CN103674422A - Test bench - Google Patents

Abstract

The invention provides a test bench, comprising a host and a binding assembly, the host includes a swing assembly and an overturning system; the swing assembly includes a swing plate that can swing freely in the front and rear directions; the overturn system is arranged on the swing plate , used to drive the object to be tested to flip and/or rotate in the horizontal plane; the main machine also includes a leveling system for adjusting the wobble plate to return to the equilibrium position without external force; the binding assembly is arranged on the turning system The test bench is used to fix the object to be tested; the test bench also includes an inclinometer for measuring the inclination angle of the wobble plate and a period meter for testing the swing period of the wobble plate. The test bench provided by the invention can measure many parameters, has short measurement process and high efficiency.

Description

a test bench

technical field

The invention relates to a test bench, in particular to a bench for testing the center of mass and moment of inertia of a rigid body.

Background technique

With the rapid development of the economy and the improvement of people's living standards, people have obviously higher requirements for the quality of life. For example, the change of transportation, from the first walking to the bicycle era, and then slowly transitioning from the bicycle era to the motorcycle era, and now more and more cars have entered the homes of ordinary people and become an indispensable means of transportation for people. .

For a passenger car, the height of its center of mass directly affects the roll and pitch performance of the passenger car; its moment of inertia directly affects the vehicle's transient handling stability; moreover, parameters such as the center of mass and moment of inertia of the car are determined during the simulation analysis process of the car Parameters that must be known in .

In the prior art, there are mainly three methods for measuring the center of mass and moment of inertia of an object: the three-wire pendulum method, the torsional pendulum method and the compound pendulum method. Among them, the three-wire pendulum method for measuring the moment of inertia of the object under test has the advantage of simple equipment, but its disadvantages are that its measurement accuracy is low, the installation of the test piece is time-consuming and laborious, and the test cycle is long. The principles of the torsion pendulum method and the compound pendulum method are basically the same, but the test bench measured by the torsion pendulum method, the adjustment of the various postures of the measured object on the test bench and the measurement of each relative position are not easy to get a good control, which will give the final measurement Accuracy has a great impact, and it is not easy to obtain good test accuracy.

At present, the tests of center of mass and moment of inertia are mainly torsion pendulum method and compound pendulum method. Existing various test instruments are complex in structure, expensive, and the parameters that can be measured are limited, which takes a long time, resulting in low test efficiency.

Contents of the invention

In order to overcome the problems of limited measurement parameters and long time consumption of testing instruments in the prior art, the present invention provides a test bench with many measurable parameters, short measurement process and high efficiency.

The test bench disclosed in the present invention includes a host and a binding assembly, the host includes a swing assembly and an overturning system; the swing assembly includes a swing plate that can freely swing in the front and rear directions; the overturn system is arranged on the swing plate for Drive the object to be tested to flip and/or rotate in the horizontal plane; the host also includes a leveling system for adjusting the wobble plate to return to a balanced position without external force; the binding assembly is arranged on the turning system, used It is used to fix the object to be tested; the test bench also includes an inclinometer for measuring the inclination angle of the wobble plate and a cycle meter for testing the swing period of the wobble plate.

When the test bench disclosed by the present invention is used to test the center of mass or the moment of inertia, the object to be tested is fixed on the turning system through the binding assembly, and the turning system is adjusted so that the object to be tested is in a different state, and the rotation of the object to be tested is known. Angle and flip angle, the center of mass of the object to be tested can be obtained through calculation. In addition, the object to be tested is placed in different states, the wobble plate is made to oscillate, and the cycle of the wobble plate is known, and the moment of inertia of the object to be tested can be obtained through calculation. Therefore, the test of the center of mass and moment of inertia of the object to be measured is realized, and the measurement process is short and the efficiency is high.

As the first improved structure, on the basis of the aforementioned original structure, the leveling system includes a sliding assembly, the sliding assembly includes a sliding plate that is arranged on the wobble plate and can slide back and forth relative to the wobble plate; the test bench Also included are gages for measuring the sliding distance of the slider.

As a second improved structure, on the basis of the first improved structure, the turning system includes a rotating assembly and a turning assembly; the rotating assembly includes a turntable that is arranged on the sliding plate and can rotate horizontally on the surface of the sliding plate; The turning assembly includes a turning plate arranged on the turntable and capable of tilting left and right relative to the turntable.

As a third improved structure, on the basis of the second improved structure, the main engine further includes a base, the swing assembly is fixed on the base; the binding assembly is arranged on the turning plate.

As a fourth improved structure, on the basis of the original structure or any one of the first, second, and third improved structures, the swing assembly further includes a bracket and a swing arm, and the swing arm is fixed at opposite ends of the swing plate, And extend upwards and be connected with the bracket, and the swing arm can swing freely back and forth on the bracket.

As a fifth improved structure, on the basis of the original structure or any one of the first, second and third improved structures, the swing assembly includes two opposite brackets, and fixed blocks are fixedly connected to the brackets, and the fixed The block protrudes upwards to form a knife edge with the first side and the second side as the surface; the swing assembly also includes a swing block, and the bottom end of the swing block is recessed upward to form a notch with the third side and the fourth side as the surface; the swing The block is located on the fixed block, and the top of the knife edge is located at the bottom of the notch; the swing blocks are fixedly connected with swing arms, and the opposite ends of the swing plate are fixed on the swing arms; the first side and the second side of the knife edge The intersection line is the swing axis, and the swing axis is also the intersection line of the third side and the fourth side;

Alternatively, the swing assembly includes two opposite brackets, each of which is fixedly connected with a fixed block, and the fixed block is recessed downward to form a notch with the first side and the second side as the surface; the swing assembly also includes Swing block, the bottom end of the swing block protrudes downward to form a knife edge with the third side and the fourth side as the surface; the swing block is located on the fixed block, and the top of the knife edge is located at the bottom end of the notch; the swing block is fixedly connected with a swing arm The opposite ends of the swing plate are fixed on the swing arm; the intersection of the third side and the fourth side of the blade is the swing axis, and the swing axis is also the intersection of the first side and the second side.

As the sixth improved structure, on the basis of the fifth improved structure, the swing assembly also includes two cantilevers extending from the top ends of the two brackets; the fixed block is fixed on the cantilever; a connecting plate is fixed above the swing block , the connecting plates all extend downwards out of the swing arm.

As the seventh improved structure, on the basis of the fifth or sixth improved structure, the fixed block protrudes upwards to form a knife edge with the first side and the second side as the surface; The fourth side is a notch on the surface; the angle between the first side and the second side is 58-92°; the angle between the third side and the fourth side is 26 greater than the angle between the first side and the second side -34°;

Alternatively, the fixed block is recessed downward to form a notch with the first side and the second side as the surface; the bottom end of the swing block protrudes downward to form a knife edge with the third side and the fourth side as the surface. The included angles of the four sides are 58-92°, and the included angles between the first side and the second side are 26-34° larger than the included angles between the third side and the fourth side.

As the eighth improved structure, on the basis of the fifth or sixth improved structure, the fixed block protrudes upwards to form a knife edge with the first side and the second side as the surface; The fourth side is a notch on the surface; the angle between the first side and the second side is 58-62° or 88-92°; the angle between the third side and the fourth side is larger than that of the first side and the second side The included angle is 26-34° larger;

Alternatively, the fixed block is recessed downward to form a notch with the first side and the second side as the surface; the bottom end of the swing block protrudes downward to form a knife edge with the third side and the fourth side as the surface. The angle between the four sides is 58-62° or 88-92°, and the angle between the first side and the second side is 26-34° larger than the angle between the third side and the fourth side.

As a ninth improved structure, on the basis of any one of the first to eighth improved structures, the swing plate has slide rails arranged in the front and rear directions, and the slide plate is arranged on the slide rails and can move along the slide rails. slide.

As the tenth improved structure, on the basis of the ninth improved structure, the electric cylinder body is fixed on the wobble plate, the electric cylinder connector is fixed on the sliding plate, and the electric cylinder body and the electric cylinder connector Cooperate with the connection to realize the sliding and fixing of the sliding plate.

As an eleventh improved structure, based on any one of the second to eighth improved structures, a rotating mechanism is fixed on the sliding plate, and the rotating mechanism is fixedly connected to the turntable and can control the turntable to rotate itself.

As the twelfth improved structure, on the basis of any one of the second to the eighth and the eleventh improved structures, the lower mounting seats are fixed on the left and right ends of the turntable, and the lower mounting seats are hinged to the upper Mounting seat; the turning plate is fixed on the upper mounting seat, and the hinge shaft on the left or right side can be used as the turning axis to turn over, so that the turning plate is inclined relative to the turntable.

As the thirteenth improved structure, on the basis of the twelfth improved structure, the turntable has four lower mounting seats distributed in a rectangle, and the rectangles are arranged with the front and rear directions as the length direction.

As a fourteenth improved structure, on the basis of the third improved structure, the measuring tool is set on the swing plate; the angle meter is set on the swing plate; and the periodometer is set on the base.

As the fifteenth improved structure, on the basis of any one of the second to eighth, eleventh to fifteenth improved structures, taking the vertical direction where the geometric center of the wobble plate is located as the center line, the pendulum The center of mass of the disk, slide plate, turntable and turntable is located on the center line, and when the turntable rotates, the center of mass of the turntable remains unchanged.

As a sixteenth improved structure, on the basis of the original structure and any one of the first to fifteenth improved structures, the binding assembly includes a base plate and a binding strap with a free end and a connecting end; the two ends of the base plate are respectively The first side wall and the second side wall extend upwards; the outside of the first side wall and the second side wall are respectively provided with a binding ratchet mechanism and a positioning part; the connecting end of the binding strap is fixedly connected to the lifting ratchet mechanism. The free end of the binding strap is used for detachable fixed connection with the positioning part; the length of the binding strap is adjustable.

As the seventeenth improved structure, on the basis of the sixteenth improved structure, the binding assembly further includes a positioning shaft with a positioning shaft body, the free end of the binding strap has a connecting sleeve, and the connecting sleeve is used for the sleeve It is arranged on the positioning shaft body of the positioning shaft; the positioning part is a positioning seat, and a positioning shaft installation hole for detachably installing the positioning shaft is opened on the positioning seat.

As the eighteenth improved structure, on the basis of the seventeenth improved structure, the two ends of the positioning shaft body have positioning caps whose diameter is larger than that of the positioning shaft body; the positioning shaft installation hole includes a circular positioning introduction hole and the positioning hole, the positioning introduction hole and the positioning hole communicate with each other, and the center of the positioning introduction hole is lower than the center of the positioning hole; the diameter of the positioning introduction hole is greater than the diameter of the positioning hole; the diameter of the positioning cap is smaller than that of the positioning introduction hole The diameter is greater than the diameter of the positioning hole; the diameter of the positioning shaft body is less than or equal to the diameter of the positioning hole, and at the same time less than or equal to the width of the connection between the positioning introduction hole and the positioning hole.

As a nineteenth improved structure, on the basis of any one of the sixteenth to eighteenth improved structures, the first side wall and/or the second side wall are screwed with a limiting rod, and the limiting One end of the stop bar is located between the first side wall and the second side wall, and the binding assembly further includes a limit plate, and the limit plate is fixed to the stop bar and is located between the first side wall and the second side wall The end; the binding belt is a soft nylon belt.

As the twentieth improved structure, on the basis of the original structure and any one of the first to nineteenth improved structures, the test bench further includes a limiting device, and the limiting device includes a base, a rotating shaft and Limiting rotary block, the two ends of the base respectively extend a first support base and a second support base towards the same side of the base, and the rotating shaft is arranged on the first support base and the second support base and is rotatable; the first The rotating shaft between the supporting seat and the second supporting seat has two limiting turning blocks fixed relative to the rotating shaft for limiting; the two oppositely arranged limiting turning blocks have different limiting widths; the rotation of the rotating shaft The limit width between the two limit turn blocks directly above the rotating shaft can be changed; the limit beam extending along the left and right directions is fixed on the bottom of the wobble plate, the limit device is arranged on the base, and the rotating shaft is located in the front and rear direction ; The limiting beam is located in the limiting area.

As the twenty-first improved structure, on the basis of the twentieth improved structure, each of the two limit rotation blocks independently includes a base block and an optional limit block; the two base blocks are relatively fixed On the rotating shaft, at least one limiting block is fixed on two opposite sides of the two base blocks.

As the twenty-second improved structure, on the basis of the twenty-first improved structure, a plurality of limit blocks are fixed on the base block, and the number of limit blocks on the two base blocks is the same and the positions are symmetrical to each other; The limit widths between the two symmetrical limit blocks are different.

As the twenty-third improved structure, on the basis of the twenty-second improved structure, the two mutually symmetrical limiting blocks have the same thickness.

As the twenty-fourth improved structure, on the basis of any one of the twenty-first to the twenty-third improved structures, the base block is a disc with the center of the rotating shaft as the center, and the limit block is from the circle The center of the disc extends to the edge of the disc.

As the twenty-fifth improved structure, on the basis of any one of the twentieth to the twenty-fourth improved structures, the rotating shaft protrudes from the outside of the second support seat, and the outside of the second support seat is fixed with a The positioning part that fixes the rotating shaft in the circumferential direction of the rotating shaft.

As the twenty-sixth improved structure, on the basis of the twenty-fifth improved structure, the rotating shaft has a plurality of positioning holes, and the positioning holes are located on the circumferential side wall of the rotating shaft outside the second support seat; The positioning part includes a pin seat fixed on the outside of the second support seat and a pin disposed in the pin seat, and the pin can be inserted into or out of the positioning hole.

As the twenty-seventh improved structure, on the basis of the twenty-sixth improved structure, the number of the positioning holes is the same as the number of the upper limit blocks of the base block; the limit blocks are evenly distributed on the base block , the positioning holes are evenly distributed on the circumferential side wall of the rotating shaft.

As the twenty-eighth improved structure, on the basis of the twenty-sixth or twenty-seventh improved structure, the pin seat is located directly below the rotating shaft, and the pin can be inserted into the positioning hole of the rotating shaft in a vertical upward direction middle.

As the twenty-ninth improved structure, on the basis of any one of the twenty-fourth to twenty-eighth improved structures, each base block has 2-6 limit blocks; A support seat outside, and form a hand wheel at its end.

As the thirtieth improved structure, on the basis of the original structure and any one of the first to twenty-ninth improved structures, the test bench further includes a support assembly for supporting the object to be tested on the turning plate, so The support assembly includes a base and a support column. One end of the support column is threadedly connected to the base, and a top helmet is fixed at the other end. The side wall of the top helmet has a top helmet adjustment hole for rotating the top helmet and the support column in the circumferential direction.

As a thirty-first improved structure, based on the thirtieth improved structure, the side wall of the base has a base adjustment hole for rotating the base.

As the thirty-second improved structure, on the basis of the thirty-first improved structure, the adjustment holes of the top helmet are evenly distributed in the circumferential direction of the side wall of the top helmet; the adjustment holes of the base are evenly distributed in the circumferential direction of the side wall of the base .

As the thirty-third improved structure, on the basis of the thirty-first or thirty-second improved structure, there are 3-8 adjustment holes for the top helmet, and 3-8 adjustment holes for the base.

As the thirty-fourth improved structure, on the basis of the original structure and any one of the first to thirty-third improved structures, the test bench also includes a hoist for hoisting the object to be tested on the turning plate Assemblies, the sling assembly includes a sling body, a plurality of upper flexible slings and a plurality of lower flexible slings; The lower flexible sling has the same number of lower connecting parts, the plurality of upper connecting parts are distributed in a fixed polygon, and the plurality of lower connecting parts are distributed in a fixed polygon; one end of the upper flexible sling is fixedly connected to the upper connecting part, and the other One end is used to connect the lifting equipment; one end of the lower flexible sling is fixedly connected to the lower connecting part, and the other end is used to connect the object to be hoisted; the lengths of the upper flexible sling and the lower flexible sling are independently adjustable.

As the thirty-fifth improved structure, on the basis of the thirty-fourth improved structure, the upper flexible sling has four, and the four upper connecting parts are distributed in a quadrilateral; the lower flexible sling has four, four The lower connecting parts are distributed in a quadrangular shape; the sling assembly also includes a hanger for connecting the lifting equipment; among the four upper flexible slings, the two upper flexible slings opposite along the diagonals of the quadrilateral are integrated to form two An integrated sling; the hanger is set on the integrated sling and can be fixed at different positions on the integrated sling.

As the thirty-sixth improved structure, on the basis of the thirty-fifth improved structure, the suspension head includes a frame and a hook connection part fixed on the frame for connecting lifting equipment, and the frame has at least A card beam, the frame on one side of the card beam, the frame on the other side of the card beam, and the frame on the other side of the card beam are alternately located on both sides of the integrated sling.

As the thirty-seventh improved structure, on the basis of any one of the thirty-fourth to thirty-sixth improved structures, the spreader body has four connecting shafts, and the connecting shafts serve as the upper connecting part and the The lower connection part; the four connection shafts are distributed in a fixed square; the four upper flexible suspenders are respectively connected to the four connection shafts, and the four lower flexible suspenders are respectively connected to the four connection shafts.

As the thirty-eighth improved structure, on the basis of the thirty-seventh improved structure, the spreader assembly further includes four high hangers and four low hangers; one end of the high hanger is connected to the upper flexible sling, and one end It is connected with the connecting shaft and can rotate around the connecting shaft. One end of the low suspension is connected with the lower flexible sling, and the other end is connected with the connecting shaft and can rotate around the connecting shaft.

As the thirty-ninth improved structure, on the basis of the thirty-eighth improved structure, the sling assembly further includes four hoisting ratchet mechanisms, and the hoisting ratchet mechanisms are fixed on the low sling and connected to the lower flexible sling Fixed connection at the end to adjust the length of the lower flexible sling.

As the fortieth improved structure, on the basis of the thirty-ninth improved structure, the end of the lower flexible sling away from the hoisting ratchet mechanism is detachably fixedly connected to a ring belt; the upper flexible sling and/or the lower The flexible sling is a nylon webbing.

Multiple parameters of the object to be tested can be tested through the test stand disclosed by the invention, and the efficiency is high.

Description of drawings

Fig. 1 is a front view of the working state of the test bench provided by the present invention.

Fig. 2 is a left view of the working state of the test bench provided by the present invention.

Fig. 3 is a partial enlarged view of A in Fig. 1 .

Fig. 4 is a partial enlarged view of B in Fig. 1 .

Fig. 5 is a partial enlarged view of position C in Fig. 2 .

Fig. 6 is a schematic diagram of the structure of the fixed block and the swinging block in the test bench provided by the present invention.

Fig. 7 is a structural schematic diagram of the binding assembly in the test bench provided by the present invention.

Fig. 8 is a schematic diagram of the use state of the binding assembly in the test bench provided by the present invention.

Fig. 9 is a schematic structural view of the positioning seat in the test bench provided by the present invention.

Fig. 10 is a partial enlarged view at D in Fig. 8 .

Fig. 11 is a schematic structural view of the positioning shaft in the test bench provided by the present invention.

Fig. 12 is a front sectional view of the limit device in the test bench provided by the present invention.

Fig. 13 is a left view of the limit device in the test bench provided by the present invention.

Fig. 14 is a front view of the limit turning block in the test bench provided by the present invention.

Fig. 15 is a top view of the limit turning block in the test bench provided by the present invention.

Fig. 16 is a left view of the limit turning block in the test bench provided by the present invention.

Fig. 17 is a front view of the support assembly in the test bench provided by the present invention.

Fig. 18 is a partial cross-sectional view of the support assembly in the test bench provided by the present invention.

Fig. 19 is a schematic diagram of the hoisting state of the hanger assembly in the test bench provided by the present invention.

Fig. 20 is an enlarged view at E in Fig. 19 .

Fig. 21 is a front view of the suspension head in the test stand provided by the present invention.

Fig. 22 is a top view of the suspension head in the test bench provided by the present invention.

Fig. 23 is a top view of the hanger body in the test bench provided by the present invention.

Fig. 24 is a front view of the test bench provided by the present invention in the left-turned working condition.

Fig. 25 is a front view of the horizontal working condition in the test bench test provided by the present invention.

Fig. 26 is a front view of the right-turned working condition during the test bench test provided by the present invention.

Fig. 27 is a top view of the left turning condition in the test bench test provided by the present invention.

Fig. 28 is a top view of the horizontal working condition in the test bench test provided by the present invention.

Fig. 29 is a top view of the right turning condition in the test bench test provided by the present invention.

Among them, reference signs:

11. Bracket; 12. Cantilever; 13. Abutment;

21. Swing arm; 22. Connecting plate; 23. Swing plate; 231. Angle meter; 232. Periodometer;

31. Fixed block; 311. First side; 312. Second side; 32. Swing block; 321. Third side; 322. Fourth side; 33. Swing axis;

4. Limiting device; 411, base; 412, first support seat; 413, second support seat; 421, handwheel; 422, rotating shaft; 43, limit turn block; 431, base block; 432, first Limiting block; 433, the second limiting block; 434, the third limiting block; 441, the latch seat; 442, the latch; 45, the limiting beam.

5. Slider; 51. Electric cylinder body; 52. Electric cylinder connector; 53. Grating ruler;

6. Turntable;

71. Turning plate; 72. Lower mounting base; 73. Upper mounting base; 74. Hinge shaft; 75. Support rod;

8. Passenger cars; 81. Tires;

9. Support assembly; 91. Base; 911. Base adjustment hole; 92. Support column; 93. Top helmet; 931. Top helmet adjustment hole;

101, hanging head; 1011, frame; 1012, card beam; 1013, hook connection part; 102, integrated sling; 103, sling body; 1031, connecting shaft; 104, lower flexible sling; Low hanging; 107, hoisting ratchet mechanism; 108, ring belt; 1091, hook;

1111, base plate; 1112, first side wall; 1113, second side wall; 112, binding ratchet mechanism; 113, binding belt; 1131, connection sleeve; 114, positioning shaft; 1141, positioning shaft body; 1142, positioning cap; 1143, bump; 115, positioning seat; 1151, positioning shaft mounting hole; 11511, positioning introduction hole; 11512, positioning hole; 117, filling block.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

In describing the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "inner", The orientation or positional relationship indicated by "outside" is based on the orientation or positional relationship shown in Figure 1, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation , constructed and operated in a particular orientation and therefore should not be construed as limiting the invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

The test bench disclosed in the present invention includes a host and a binding assembly, the host includes a swing assembly and an overturning system; the swing assembly includes a swing plate that can freely swing in the front and rear directions; the overturn system is arranged on the swing plate for Drive the object to be tested to flip and/or rotate in the horizontal plane; the host also includes a leveling system for adjusting the wobble plate to return to a balanced position without external force; the binding assembly is arranged on the turning system, used It is used to fix the object to be tested; the test bench also includes an inclinometer for measuring the inclination angle of the wobble plate and a cycle meter for testing the swing period of the wobble plate.

The swing assembly includes a swing plate, and the swing plate can swing freely in the front and rear directions. As known to those skilled in the art, the swing is a pendulum swing, that is, free swing around a swing axis. The swinging direction is the front-back direction.

In the present invention, there is no special limitation on the wobble plate in the oscillating assembly, as long as the wobble plate can freely swing in the front and rear directions, and various existing structures can be adopted for its supporting structure. According to the present invention, preferably, the swing assembly further includes a bracket and a swing arm, the swing arm is fixed at opposite ends of the swing plate, extends upwards, and is connected with the bracket, and the swing arm can move forward and backward freely on the bracket swing.

Preferably, the oscillating assembly includes two opposite brackets, each of which is fixedly connected with a fixed block, and the fixed block protrudes upwards to form a knife edge with the first side and the second side as the surface; the oscillating assembly also includes Swing block, the bottom end of the swing block is recessed upward to form a notch with the third side and the fourth side as the surface; the swing block is located on the fixed block, and the top of the knife edge is located at the bottom of the notch; the swing block is fixedly connected with a swing arm The opposite ends of the swing plate are fixed on the swing arm; the intersection of the first side and the second side of the knife edge is the swing axis, and the swing axis is also the intersection of the third side and the fourth side.

At this time, through the cooperation of the knife edge and the notch, the swing arm and the swing plate can swing around the swing axis, the swing resistance is small, the swing period is fully attenuated, and the swing period is stable.

Further preferably, the angle between the first side and the second side is 58-92°; the angle between the third side and the fourth side is 26-34° greater than the angle between the first side and the second side. Furthermore, the angle between the first side and the second side is 58-62° or 88-92°.

In the above structure, the bracket is used as a supporting body for supporting the whole assembly. For its structure, there is no limit, as long as it can realize the supporting function. For example, a frame-like bracket can be used, and a plate-like support arm can also be used.

According to the present invention, for supporting the entire swing system, there are two supports, which are arranged oppositely. There is a swing area between the two oppositely arranged supports.

A fixed block is fixed on the support. In the present invention, the fixed block is an important component for realizing the swing. There are many ways to install the fixing block on the bracket. Preferably, it includes two cantilevers extending from the top ends of the two brackets; the fixing block is fixed on the cantilever.

A fixed block is respectively fixed at the top of the two oppositely extending cantilevers. The fixing block protrudes upwards to form a knife edge with the first side and the second side as surfaces. In the present invention, taking the intersection of the first side and the second side as the swing axis, the cross section of the knife edge perpendicular to the swing axis is triangular. It can be understood that the line of intersection of the first side and the second side of the knife edge on the left support and the line of intersection of the first side and the second side of the knife edge on the right support are on the same straight line.

According to the present invention, the included angle between the first side and the second side is 58-92°. That is, the knife edge angle is 58-92°.

Meanwhile, the swing shaft assembly also includes a swing block. The swinging block is used as a functional part to cooperate with the fixed block to realize swinging. The swing block is arranged on the fixed block. The bottom end of the oscillating block is recessed upwards to form a notch with the third side and the fourth side as surfaces. At the same time, the swing axis is also the intersection line of the third side and the fourth side; that is, the intersection line of the third side and the fourth side is the same line as the swing axis. Since the knife edge and the notch are different three-dimensional objects, to be precise, the intersection line between the first side and the second side (that is, the swing axis) and the intersection line between the third side and the fourth side cannot be the same straight line, but this In the invention, the difference here can be ignored, and the very close top of the knife edge (intersection line of the first side and the second side) and the bottom end of the notch (intersection line of the third side and the fourth side) are regarded as the same straight line. That is, the cross section of the notch perpendicular to the swing axis is triangular. Moreover, the angle between the third side and the fourth side is 26-34° larger than the angle between the first side and the second side. That is, the notch angle is 26-34° larger than the included angle of the knife edge.

Specifically, the connection between the swing block and the fixed block is realized by the top of the knife edge of the fixed block being located at the bottom of the notch. At this time, the line of intersection between the first side and the second side (ie, the top of the knife edge) and the line of intersection between the third and fourth sides (ie, the bottom of the notch) are regarded as collinear in the present invention. It should be noted that, in the up-down direction, the knife edge protrudes upwards, and the top of the knife edge is located at the uppermost part of the entire knife edge structure. The notch is formed by the upward depression of the bottom end of the swing block, so the opening end of the notch is located at the bottom of the entire notch structure, and the bottom end of the notch is located at the top of the entire notch structure.

According to the present invention, there are two fixed blocks with knife edges, which are respectively located on the two cantilevers at the top ends of the two opposite supports. Similarly, there are two notches matched with the knife edge, that is, there are two swing blocks, which are all connected to the fixed block according to the aforementioned connection mode between the knife edge and the notch.

In the test of the moment of inertia of passenger cars, etc., it is usually necessary to use the swing to test the relevant parameters. Therefore, the swing process has a great influence on the accuracy of the parameter test. The inventors found that the swing period of the existing swing mechanisms, such as bearings, changes very quickly, usually there is not enough time to obtain the parameters, and, due to the fast change, the obtained swing period parameters have a large error, which in turn affects the final moment of inertia. Test accuracy.

However, in the oscillating assembly disclosed in the present invention, when the angle of the knife edge is 58-92° and the notch angle is 26-34° larger than the angle of the knife edge, the slower the swing cycle changes during the swing process, the more time is available to obtain the swing cycle. In addition, the long swing cycle can obtain more sets of data, and can better eliminate errors, so that the higher the accuracy of the obtained swing cycle, the smaller the error, which is very beneficial to improve the test accuracy.

In addition, when the angle of the notch and the angle of the knife edge meet the above relationship, it can be guaranteed that the knife edge will not slip back during the swing process, and the torque of the knife edge and the notch during the swing process can be greatly reduced, ensuring that the knife edge and the notch Stable and free from damage; at the same time, the knife edge and notch matched with the above angles can greatly ensure the stability of the swing, make the swing swing stable, and ensure that the obtained parameters such as the swing cycle have high accuracy.

Further, when the angle between the first side and the second side (that is, the angle of the knife edge) is 58-62° or 88-92°, the above effect is particularly obvious. Especially when the blade angle is 88-92°, on the basis of the aforementioned advantages, the service life of the balance shaft assembly can be further improved.

In the present invention, the swing block is fixedly connected with a swing arm. The swing arm can be directly fixed on the swing block. Preferably, a connecting plate is fixed above the swing block, and the connecting plate extends downward out of the swing arm. A swing plate is connected between the swing arms connected by the two swing blocks. The wobble plate is used to carry objects to be tested. Preferably, when the swing assembly is in a natural state, the swing plate is in a horizontal state.

Preferably, two swing arms extend downwards from both ends of the connecting plate. The two swing arms at the same end of the connecting plate are both connected to the corresponding end of the swing plate for more stable connection with the swing plate. The plane where the two swing arms at the same end of the connecting plate are located is perpendicular to the swing axis.

In order to make the center of mass of the swing assembly disclosed in the present invention more stable and avoid affecting the swing test, preferably, the vertical plane where the swing axis is located is the plane of symmetry, and the bracket, the cantilever, the fixed block, the swing block, and the connecting plate are The structures of the swing arm and the swing plate are respectively symmetrical with respect to the symmetry plane.

Similarly, according to the present invention, the positions of the knife edge and the notch in the above structure can be interchanged, that is, the knife edge is located at the bottom of the oscillating block, and the notch is located at the top of the fixed block. Specifically, the swing assembly includes two opposite brackets, each of which is fixedly connected with a fixed block, and the fixed block is recessed downward to form a notch with the first side and the second side as the surface; the swing assembly also It includes a swing block, the bottom end of which protrudes downward to form a knife edge with the third side and the fourth side as the surface; the swing block is located on the fixed block, and the top of the knife edge is located at the bottom end of the notch; The opposite ends of the swing plate are fixed on the swing arm; the intersection of the third side and the fourth side of the knife edge is the swing axis, and the swing axis is also the intersection of the first side and the second side .

Similar to the aforementioned structure, the angle between the third side and the fourth side (that is, the angle of the knife edge) is 58-92°, and the angle between the first side and the second side (that is, the angle of the notch) is larger than that between the third side and the second side. The included angle of the fourth side is 26-34° larger.

Similarly, when the angle between the third side and the fourth side (that is, the angle of the knife edge) is 58-62° or 88-92°, it is more beneficial to further ensure the stability of the swing and improve the test accuracy. Especially when the blade angle is 88-92°, on the basis of the aforementioned advantages, the service life of the balance shaft assembly can be further improved.

Similar to the aforementioned structure, in this structure, in the vertical direction, the knife edge protrudes downward, and the top of the knife edge is located at the bottom of the entire knife edge structure. The notch is formed by the downward depression of the top of the fixing block, so the opening end of the notch is located at the uppermost part of the entire notch structure, and the bottom end of the notch is located at the lowermost part of the entire notch structure.

According to the present invention, the swing assembly further includes two cantilevers extending from the top ends of the two supports; the fixed block is fixed on the cantilever; a connecting plate is fixed above the swinging block, and the connecting plates extend downwards out of the swing arm.

The swinging of the object to be tested is realized by the above-mentioned swinging assembly. However, in the measurement of the center of mass and the test of the moment of inertia, it is necessary to return the wobble plate carrying the object to be tested to the equilibrium position (that is, under the action of no external force, the wobble plate returns to the state where no swing occurs. location when cheap). However, after the object to be tested is fixed on the test bench, the whole system is in an unbalanced state. Without the action of external force, the wobble plate will swing, and its position will deviate in the front-back direction. In this regard, the test bench disclosed in the present invention also includes a leveling system for adjusting the wobble plate to return to the equilibrium position without external force.

Specifically, the above-mentioned leveling system can add a counterweight to a specific position of the wobble plate until the wobble plate returns to a balanced position. The disk gradually returns to the equilibrium position.

Preferably, the leveling system includes a slide assembly, the slide assembly includes a slide plate that is arranged on the swing plate and can slide back and forth relative to the swing plate; the test bench also includes a slide plate for measuring the sliding distance of the slide plate measuring tool.

In the test bench disclosed in the present invention, the sliding plate is arranged on the swing plate, and can slide on the swing plate in the front-rear direction. When testing, since the center of mass of the object under test is unknown, when the object under test is fixed on the turntable, the center of mass of the object under test and the center of mass of the test bench are generally not on a vertical line, and the entire system (the object under test and the test bench frame) is in an unstable state, and the wobble plate will swing in the front and back directions, deviating from its original position. At this time, by sliding the sliding plate, the turning system on it and the object to be tested on the turning plate are driven to slide, and the position of the center of mass of the entire system is adjusted, so that the swinging plate slowly returns to the original position, so that the system is balanced again.

In order to make the sliding plate slide on the swing plate, it can be realized in various ways. In the present invention, preferably, the swing plate has slide rails arranged in the front and rear directions, and the slide plate is arranged on the slide rails and can Slide along the rails.

According to the present invention, an electric cylinder body is fixed on the swing plate, an electric cylinder connector is fixed on the sliding plate, and the electric cylinder body and the electric cylinder connector are matched and connected to realize sliding and fixing of the sliding plate. That is, during use, when it is necessary to slide the sliding plate, control the electric cylinder body and the electric cylinder connector to make the electric cylinder core in the electric cylinder body expand and contract, realize the push-pull action, and make the sliding plate slide relative to the swing plate. Through the cooperation of the electric cylinder body and the electric cylinder connector, not only can the sliding plate be started to slide, but also it can be locked. It should be noted that the arrangement of the above-mentioned electric cylinder connector and electric cylinder body is only one way, and other similar arrangement structures can also be used, as long as the drive slider can move in the front and rear direction relative to the swing plate, and the slider can be locked. , so that the sliding plate is stationary relative to the swinging plate.

When the test bench disclosed by the present invention is used for testing, it is usually necessary to know the sliding distance of the sliding plate. According to the present invention, preferably, a measuring tool for measuring the sliding distance of the sliding plate is provided on the wobble plate. In order to improve the accuracy, more preferably, a grating ruler can be used as a measuring tool. As we all know, the grating ruler is composed of two parts: the scale grating and the grating reading head. In the present invention, the grating reading head is fixed on the swing plate, the scale grating is arranged on the slide plate, and the indicating grating is installed in the grating reading head. The sliding of the slide plate drives the grating of the scale to move, which moves relative to the reading head of the grating, and then generates readings. This reading is the distance the slide plate slides relative to the wobble plate.

During the above process, the sliding distance of the sliding plate is constantly adjusted through the electric cylinder block and the electric cylinder connector, so that the wobble plate slowly returns to the original position. Since the wobble plate is in a non-original position, in the vertical direction, it deviates from the original position by a certain angle, according to the present invention, in order to better monitor whether the wobble plate returns to the original position, preferably, the wobble plate A goniometer is fixed on it. Measure the tilting angle of the wobble plate with an inclinometer. In the present invention, the goniometer can adopt various goniometers in the prior art, as long as it can test the swinging angle of the wobble plate, for example, the goniometer is fixed on the wobble plate, when the wobble plate is horizontally stationary, The pointer of the angle meter points to the scale "0", indicating that the deflection angle of the wobble plate is 0; when the wobble plate swings, tilts and is in a non-horizontal state, at this time, the pointer in the angle meter fixed on the wobble plate moves relative to the dial , so that the reading of the pointer is not 0, the reading on the dial pointed by the pointer is the deflection angle of the wobble plate.

After knowing that the wobble plate returns to the original position through the above-mentioned angle meter, read the reading of the grating ruler and record it.

In order to realize the test of the center of mass and moment of inertia of the object to be tested, the attitude of the object to be tested needs to be adjusted several times. In the present invention, it is realized by the flipping system. Specifically, the turning system includes a rotating assembly and a flipping assembly; the rotating assembly includes a turntable that is arranged on the sliding plate and can rotate horizontally on the surface of the sliding plate; Turning plate tilted left and right.

According to the present invention, the turntable is arranged on the slide plate and can rotate on the slide plate.

Usually, in order to realize the test of the center of mass and moment of inertia of the object to be tested, the attitude of the object to be tested needs to be changed. In the present invention, the turntable is arranged on the slide plate and can rotate on the slide plate. Further, the turntable fixed on the turntable and the object to be tested on the turntable are driven to rotate, thereby realizing the change of the attitude of the object to be tested.

In order to realize the rotation of the turntable on the slide plate, the specific structure is not limited, as long as the above purpose can be achieved. Preferably, the slide plate is fixed with a rotating mechanism, which is fixedly connected to the turntable and can control the turntable rotation. Specifically, the slide plate and the turntable are connected through a rotating track, and the turntable can rotate along the turning track. The rotation of the turntable can be driven by manpower or connected to the turntable by a motor or motor to drive the turntable to rotate.

The same purpose as the turntable, in order to realize the test of the center of mass and moment of inertia of the object to be tested, the attitude of the object to be tested needs to be changed. In the present invention, the object to be tested is driven to turn over and tilt by turning over the plate, so as to test parameters such as its center of mass and moment of inertia.

In order to achieve the above object, according to the present invention, it is enough to drive the reversing plate to turn and tilt in the left and right directions. Preferably, the left and right ends of the turntable are fixed with a lower mount, and the lower mount is hinged to an upper mount through a hinge; the turntable is fixed on the upper mount, and the hinge on the left or right can be The turning axis is turned over, so that the turntable is inclined relative to the turntable.

According to the above structure, when turning to the left, the turntable can be driven, and the turning can be done with the hinge axis on the left as the turning axis; similarly, when turning to the right is needed, the turning can be turned with the hinge axis on the right.

Based on the above structure, preferably, the turntable has four lower mounting seats, and the four lower mounting seats are distributed in a rectangular shape with the front-rear direction as the length direction. That is, the rectangle formed by connecting the four lower mounting bases has four sides located in the front-rear direction and the left-right direction respectively.

After turning the turntable at a certain angle, the turntable needs to be fixed to keep it in a tilted state for testing. In the above state, the lower mounting seat fixed on the turntable and the upper mounting seat fixed on the turntable are hinged by hinge shafts. When flipping is required, the hinge shaft on one side can be disassembled, so that the flip disk can rotate around the hinge shaft on the other side to realize flipping and tilting. For example, when flipping to the left, the hinge shaft on the right side and the Disassemble the upper mounting base and the lower mounting base, and use the lifting equipment to lift the right side of the turntable to make it tilt, and then use the support rod to support it between the turntable and the right side of the turntable, and fix the turntable to keep it in a tilted state .

Meanwhile, according to the present invention, the host machine further includes a base, and the swing assembly is fixed on the base. The two brackets are fixed on the abutment. The two brackets are connected through the abutment, so that the swing assembly becomes a fixed whole. to facilitate its movement.

When using the test bench disclosed in the present invention to test the moment of inertia, it is necessary to obtain the swing cycle of the wobble plate. In the present invention, a period meter can be fixed on the base to test the swing cycle of the wobble plate. In the present invention, the periodometer can adopt various periodometers in the prior art, as long as it can test the swing period of the wobble plate.

In order to make the center of mass of the test bench disclosed by the present invention more stable and avoid affecting the swing test, preferably, the vertical line passing through the midpoint of the swing axis is the center line, and the swing plate, sliding plate, and turntable , the center of mass of the turntable is located on the center line; and, when the turntable rotates, the center of mass of the turntable remains unchanged. For the above structure, equivalently, the central line can be used as the center of symmetry, and the structures of the wobble plate, the sliding plate, the rotating plate, and the turning plate are respectively axisymmetric to the center line. The wobble plate, sliding plate, turntable, and turning plate with the above characteristics can be realized during the processing, and the centroid of each component can also be obtained after the processing is completed. The acquisition method is well known in the art, for example, for components with symmetrical and uniform mass distribution , whose centroid is its geometric center. As for the above-mentioned wobble plate, slide plate, turntable, and turning plate, preferably, the wobble plate, turn plate, and slide plate are plate-shaped cube structures, and the turntable is plate-shaped cube structures or plate-shaped cylinder structures.

In the present invention, the mutual positional relationship among the above-mentioned wobble plate, sliding plate, turntable and turning plate can be adjusted, as long as it can drive the object to be tested to rotate and flip. For example, the positions of the turntable and the turntable can be reversed.

In the present invention, only the setting of the wobble plate, the slide plate, the turntable, and the turn plate from bottom to top is taken as an example for illustration.

According to the present invention, the purpose of the above-mentioned binding assembly is to fix the object to be tested on the turning plate. There are many structures that can achieve the above purpose. In the present invention, preferably, the binding assembly includes a base plate and a free end and a connecting end. Binding belt; the base plate is provided with a positioning part, the connecting end of the binding band is fixedly connected to the base plate, and the free end of the binding band is used for detachable fixed connection with the positioning part; the length of the binding band can be Tune.

In the above structure, the substrate is used to support and fix the object to be tested, so that the bundled object to be tested and the binding assembly are fixed as a whole. Typically, in use, the substrate is fixed on a test bench. The substrate can be in various plate-like structures. Preferably, the first side wall and the second side wall respectively extend upwards from both ends of the substrate. The first side wall and the second side wall are respectively used for installing the binding belt and the positioning part.

For the binding belt used in the above structure, various flexible belts can be used. Preferably, the binding belt is a soft nylon belt. Nylon soft bags have the advantages of good flexibility and high strength.

The component used for binding the object to be tested, the binding strip has two ends, which are respectively defined as a free end and a connecting end in the present invention, and the connecting end is used to be fixedly connected to the substrate. The free end is used for detachable connection to the positioning part, that is, when the binding is performed, the free end is fixedly connected to the positioning part; when the binding is not performed, the free end can be separated from the positioning part, and its position is not limited.

Moreover, the length of the above-mentioned binding strap is adjustable. In the present invention, the adjustable length of the binding belt is defined as: the length of the binding belt can be adjusted, and when the length of the binding belt is adjusted properly, its length can be fixed, so as to perform a firm binding position. When bundling, the length of the strap is defined as "bundle length". That is, it can be understood that in the present invention, the adjustable length of the binding belt means that the "binding length" of the binding belt is adjustable.

Specifically, the connecting end of the binding strap is fixedly connected to the base plate, and there are many adjustment structures for its length, and various structures in the prior art can be used. Preferably, in the present invention, the length of the binding strap is realized by the binding ratchet mechanism Specifically, a binding ratchet mechanism is fixed on the end of the base plate opposite to the positioning portion, and the connecting end of the binding strap is fixedly connected to the binding ratchet mechanism.

Specifically, when both ends of the base plate have a first side wall and a second side wall, the binding ratchet mechanism and the positioning part can be respectively fixed on the outer sides of the first side wall and the second side wall.

When both ends of the substrate have the first side wall and the second side wall, in order to better realize the fixation of the object to be tested on the substrate, preferably, the binding assembly also includes a A filler block between the side wall and the second side wall. Through the blocking effect of the filling block, it is possible to better prevent the object to be tested from sliding sideways on the substrate, so that the binding is more stable.

Furthermore, in order to more accurately and stably fix the object to be bound laterally, the first side wall and/or the second side wall are screwed with a limit rod, and one end of the limit rod is located on the first side wall and the second side wall.

Preferably, the binding assembly further includes a limiting plate, and the limiting plate is fixed to the end of the limiting rod located between the first side wall and the second side wall.

The area between the first side wall and the second side wall is used as the binding area, and the limit rod is screwed to the first side wall and/or the second side wall. At this time, the extension of the limit rod can be adjusted by rotating the limit rod. When in use, rotate the limit rod so that the limit plate at the end of the limit rod is against the side of the object to be bound, and exert a lateral force on the object to be bound, which can better prevent the object to be bound Side slip occurs on the base plate, making the binding more stable. And this structure only needs to adjust the limit rod to realize the binding and positioning of the objects to be bound with different widths.

In the above structure, the limiting plate is fixed to the end of the limiting rod, for example, it can be realized by welding or other methods. It is only necessary to fix the limit plate in the axial direction of the limit rod.

In order to facilitate the rotation of the limit rod, a runner can be arranged at the other end of the limit rod.

Through the above-mentioned binding ratchet mechanism, the length of the binding belt can be adjusted conveniently, and its structure is stable, and the object to be tested can be firmly fixed when binding.

According to the present invention, there are many structures in which the free end of the binding strap can be detachably fixedly connected to the positioning part. For example, the free end of the binding strap can be fixedly connected to a hook, and a shaft is set at the positioning part. When binding, The hook can be hooked on the shaft for fixing; when not binding, the hook can be taken off.

Preferably, in order to make the binding structure more stable, so that the object to be tested is bound more firmly, preferably, the free end of the binding strap is used to fix the positioning shaft; the positioning part is a positioning seat, and the positioning seat A positioning shaft installation hole for detachably installing the positioning shaft is opened on the top.

There are various structures for fixing the free end of the binding strap on the positioning shaft. For example, a positioning cap at one end of the positioning shaft axially extends out of a projection along the positioning shaft body. A connecting sleeve is formed at the free end of the binding band, and the connecting sleeve is used to be sleeved on the positioning shaft body. When it is necessary to fix the free end of the binding strap on the positioning shaft, the protrusion can be used as the front end to pass through the connecting sleeve at the free end of the binding strap, so that the positioning shaft body is in the connecting sleeve.

In order to prevent the positioning shaft from slipping out of the positioning shaft mounting hole when it is installed in the positioning shaft mounting hole, preferably, the positioning shaft includes a positioning shaft body and positioning caps located at both ends of the positioning shaft body, and the positioning shaft The diameter of the body is smaller than that of the positioning cap. At this time, the positioning shaft body can be firmly fixed on the positioning seat through the limiting function of the positioning cap.

As known to those skilled in the art, the above-mentioned positioning seat includes two parallel support bodies, each of which has installation positioning holes, and the installation positioning holes on the two support bodies are opposite to each other.

For the above positioning installation hole, preferably, the positioning shaft installation hole includes a circular positioning introduction hole and a positioning hole, the positioning introduction hole and the positioning hole communicate with each other, and the center of the positioning introduction hole is lower than the center of the positioning hole; The diameter of the positioning introduction hole is greater than the diameter of the positioning hole; the diameter of the positioning cap is smaller than the diameter of the positioning introduction hole and greater than the diameter of the positioning hole; the diameter of the positioning shaft body is less than or equal to the diameter of the positioning hole, and at the same time less than or It is equal to the width of the connection between the positioning guide hole and the positioning hole. At this time, the fixing and removal of the positioning shaft in the positioning shaft installation hole can be realized conveniently, and when the binding assembly is in use, one end of the binding strap is fixed on the binding ratchet mechanism, and the connecting sleeve at the other end is sleeved with the positioning shaft of the positioning shaft. On the body, the positioning shaft is located in the positioning hole. When binding, the binding belt is in a stressed state, and the object to be bound is fixed through the binding ratchet mechanism fixed on the base plate and the positioning hole of the positioning part. At this time, the positioning shaft is pulled obliquely by the binding belt and will not fall into the positioning guide hole; when the object to be bound needs to be unloaded, adjust the binding ratchet mechanism to loosen the binding band, the positioning shaft will fall into the positioning guide hole under the action of gravity, and the positioning shaft will be connected to the end of the binding band. Just take it out of the case.

In the test bench disclosed in the present invention, the limit device includes a base, a rotating shaft and a limit turning block, and the two ends of the base respectively extend a first supporting seat and a second supporting seat toward the same side of the base, and the rotating shaft It is arranged on the first support base and the second support base and is rotatable; on the rotating shaft between the first supporting base and the second supporting base, there are two limit turning blocks fixed relative to the rotating shaft for limiting; the oppositely arranged There are different limit widths between the two limit turn blocks; the rotation of the rotating shaft can change the limit width between the two limit turn blocks directly above the turn shaft; the bottom of the wobble plate is fixed with limit The beam, the limiting device is arranged on the base platform, and the rotating shaft is located in the front-back direction; the limiting beam is located between the two limiting rotary blocks.

When hoisting the tested vehicle onto the test bench, it is necessary to ensure the stability of the test bench as much as possible and avoid swinging as much as possible. However, during the test, the test bench needs to swing to a certain extent. If the test bench is completely fixed when hoisting the vehicle under test, the subsequent swing test cannot be performed.

According to the present invention, when used on a test bench of a passenger car, the limit turning block can be adjusted to minimize the limit width of the limit and ensure that the test bench does not swing greatly. Two limit turn blocks can ensure the safety of the test bench swing. At the same time, when the swing test is required, the limit turning block can be adjusted to increase the limit width which acts as a limit, so that the test bench can swing safely within this range, which is convenient for testing.

In addition, due to the heavy weight of the tested vehicle on the test bench, the force and load generated by it are also very large, which can easily cause damage to the limit device, which not only poses a safety hazard, but also shortens the service life of the limit device. In the present invention, the limiting rotary block is fixed to the rotating shaft, and the limiting rotating block is completely fixed on the rotating shaft, so that the limiting rotating block can bear huge pressure along the axial direction of the rotating shaft. Moreover, the structure will not cause damage to the rotating shaft, thereby improving the service life of the limiting device. Moreover, the limit turn block and the rotating shaft are fixed, even if the limit turn block collides with the parts to be limited, the limit turn block will not move, and the distance between the two oppositely set limit turn blocks will not change. Test During the test process, the swing stability of the platform is greatly improved, which is very beneficial to improve the test accuracy.

According to the present invention, the above-mentioned base is used as the basis of the position-limiting device, and is usually fixed during use to ensure the stability of the position-limiting device.

The two ends of the base respectively extend a first support base and a second support base towards the same side of the base. The first supporting seat and the second supporting seat are used as supporting components for supporting the rotating shaft and the limit turning block.

The rotating shaft is arranged on the first supporting base and the second supporting base and is rotatable. The above-mentioned structure can adopt various existing structures, as long as the rotating shaft can be fixed on the first supporting seat and the second supporting seat, so that its relative position with the first supporting seat and the second supporting seat is fixed, but the rotating shaft can rotate freely . Specifically, the first support seat and the second support seat have two opposite rotating shaft installation holes, the rotating shaft passes through the shaft sleeve and is fixed in the shaft installation hole, and the rotating shaft can rotate in the shaft sleeve.

Two limit turning blocks are fixed on the rotating shaft, and the limit turning blocks are arranged between the first support base and the second support base. The position of the limit turning block on the rotating shaft is fixed and cannot be moved, but it can rotate with the rotating shaft. The portion above the rotating shaft between the two limiting turning blocks forms a limiting area, that is, the space above the rotating shaft and between the two opposite limiting turning blocks is the limiting area. During use, the limit beam is in the limit area.

There are different limit widths between the two limit turn blocks arranged oppositely. The aforementioned limiting width is the width between the parts of the two limiting rotary blocks that can function as limiting components. There are different limit widths between the two limit turn blocks by setting the two opposite sides of the two limit turn blocks as non-planar, that is, the above two planes have different distances, and the limit turn blocks have The part of the distance can play the role of limit.

The rotation of the limit turning block can change the limit width between the two limit turning blocks directly above the rotating shaft. Through this structure, it is possible to adjust the width of the required limit by turning the limit rotary block.

The above-mentioned structure can be realized by various means. Preferably, the two limit turning blocks independently include a base block and an optional limit block; the two base blocks are relatively fixed on the rotating shaft, and the two base blocks At least one limiting block is fixed on the two opposite sides of the block. For example, when two limit turn blocks are arranged left and right, the right side of the left limit turn block is opposite to the left side of the right limit turn block. The left limit turning block includes a left base block, a limit block covering a part of the right side is fixed on the right side of the left base block, and the right limit turn block only includes a right base block. At this time, the limiting block on the right side of the left base block and the right base block, and the left base block and the right base block are two groups that can play a limiting role. At this time, the distance from the limit block on the right side of the left base block to the right base block can be regarded as the first limit width, and the distance between the left base block and the right base block can be regarded as the second limit width. bit width.

According to the present invention, in order to increase the number of adjustable limit widths, preferably, a plurality of limit blocks are fixed on the base block, the number of limit blocks on the two base blocks is the same and the positions are symmetrical to each other; multiple groups The distances between the two mutually symmetrical limiting blocks are different.

At this time, the spacing between the two mutually symmetrical limiting blocks respectively located on the two base blocks is the corresponding limiting width of the above two limiting blocks.

It is relatively simple to realize that the spacing between two symmetrical limit blocks (that is, the limit width) is different. For example, by adjusting the thickness of the limit block, the adjustment of the corresponding limit width can be realized. The spacing between the two limiting blocks that realize mutual symmetry (that is, the limiting width) is different.

There are multiple groups of the above-mentioned limiting blocks on the two base blocks, and the distances between the multiple groups of the above-mentioned limiting blocks are different. Therefore, the limiting device has multiple limiting widths. Only by turning the limit rotary block, the change of the limit width can be realized.

According to the present invention, preferably, the two mutually symmetrical limiting blocks have the same thickness.

At this time, it can be assumed that there is a middle plane parallel to the two base blocks in the middle of the two base blocks, and the distances from the two opposite sides of the two base blocks to the middle plane are equal. When the thicknesses of the two symmetrical limit blocks are equal, the two limit blocks are mirrored relative to the middle plane, and the distance between the two limit blocks (that is, the distance between the two limit blocks) bit width) is on this midplane.

It can be known that, when the two symmetrical limiting blocks on the two base blocks have the same thickness, the midpoints of each group of the two symmetrical limiting blocks are located on the middle plane. In the natural state, the object to be limited is placed in the middle of the two limit turning blocks, that is, the above-mentioned middle plane. When swinging, the two limit turning blocks are equidistantly and symmetrically distributed on both sides of the object to be limited, which makes the swing process more balanced and stable, and is more beneficial to improving the test accuracy.

In the above structure, the rotation of the rotating shaft drives the rotation of the limiting block, and the limiting block continuously enters the limiting area, and at the same time, the limiting block turns out of the limiting area. Moreover, there may be multiple sets of limiting blocks in the limiting area. Each set of limit blocks has its own different limit width. But among them, only one group of limit blocks can actually play a limit role. At this time, this group of limit blocks is the limit block that actually plays a limit role, and its corresponding limit width is the current actual limit. width.

Preferably, the thickness of the upper limit block of the base block increases or decreases sequentially. And the distribution of the limit blocks usually needs to ensure that each limit block can play a limiting role under appropriate conditions. For example, when the limit beam is large, the distance between the limit blocks needs to be increased to ensure that the limit blocks can function independently. And when the limiting beam is smaller, the spacing between the limiting blocks can be reduced. The specific distribution only needs to meet the above requirements.

According to the present invention, in order to keep the rotating shaft stable and not rotate when the position is limited, preferably, the rotating shaft extends out of the second support base; Fixed positioning part. Those skilled in the art can understand that the above-mentioned "fixing the rotating shaft in the circumferential direction of the rotating shaft" refers to fixing the rotating shaft in the circumferential direction of the rotating shaft to prevent it from rotating. position, the shaft can be fixed in this position.

Through the positioning part, the rotating shaft can be fixed in the circumferential direction of the rotating shaft, and then the limit turning block can be fixed, so that the limit width can not be changed under the action of external force, and the stability of the limit is improved.

In order to achieve the above purpose, various structures commonly used in the prior art can be adopted. Preferably, the rotating shaft has a plurality of positioning holes, and the positioning holes are located on the circumferential side of the rotating shaft outside the second support seat. On the wall; the positioning part includes a pin seat fixed on the outside of the second support seat and a pin arranged in the pin seat, and the pin can be inserted into or out of the positioning hole.

In the above structure, the direction between the first support seat and the second support seat is inward, the direction of the first support seat away from the second support seat and the direction of the second support seat away from the first support seat are outward.

The rotation of the rotating shaft can change the positioning hole towards the bolt seat. Rotate the rotating shaft, when it is rotated to an appropriate position, when it is necessary to fix the rotating shaft in the circumferential direction of the rotating shaft, insert the latch along the latch seat into the corresponding positioning hole, and then the rotating shaft can be fixed in the circumferential direction of the rotating shaft. When it is necessary to continue to rotate the rotating shaft, the latch is pulled out so that the latch is separated from the positioning hole, and at this moment, the rotating shaft can rotate freely.

According to the present invention, in order to correspondingly adjust and fix the limiting width of the limiting area, preferably, the number of the positioning holes is the same as the number of the upper limit blocks of the base block. Moreover, when a group of mutually symmetrical limiting blocks plays a limiting role, there is a positioning hole corresponding to the latch, and when the limiting width corresponding to the group of limiting blocks needs to be fixed, the latch can be inserted into the positioning hole. The number of positioning holes is the same as the number of upper limit blocks of the base block, which can ensure that each limit block can be fixed at its limit position, that is, a stable limit width corresponding to the number can be obtained.

For the limiting device with the above structure, preferably, the limiting blocks are evenly distributed on the base block, and the positioning holes are evenly distributed on the circumferential side wall of the rotating shaft.

In order to facilitate installation and operation, the bolt seat is located directly below the rotating shaft, and the bolt can be inserted into the positioning hole of the rotating shaft in a vertical upward direction.

Various shapes and structures can be used for the base block. For ease of operation, preferably, the base block is a disc with the center of the rotating shaft as the center.

The setting of the upper limit block of the base block is not too restrictive, as long as the rotation of the limit rotary block can change the width of the limit area, preferably, the limit block extends from the center of the disc to the edge of the disc .

The number of limiting blocks depends on the size of the actual limiting beam, that is, the required limiting width, and those skilled in the art can choose according to the actual use conditions. Preferably, 2-6 limit blocks are fixed on each base block.

According to the present invention, in order to facilitate operation, preferably, the rotating shaft protrudes from the outside of the first support seat, and forms a hand wheel at its end. When the rotating shaft needs to be turned, the handwheel can be turned directly, which is easy to operate.

In the test bench disclosed by the present invention, the support assembly includes a base and a support column, one end of the support column is screwed to the base, and a top helmet is fixed at the other end, and a top for rotating the top helmet and the support column is provided on the top helmet. Helmet adjustment holes.

When the vehicle is used as the object to be tested, since the vehicle is in contact with the turntable through the tire, the tire will deform when the attitude of the vehicle changes during the test, resulting in a change in the center of mass of the vehicle and affecting the test accuracy.

For this, when in use, the support assembly is placed on the turntable, then the top helmet and the support column are rotated, and the top helmet is slowly raised until the top helmet touches the lower part of the vehicle under test. The top helmet can prevent the change of the height of the vehicle caused by the deformation of the wheels during the post-test process, thereby avoiding the change of its center of mass. At this time, the adjustment of the support height of the support assembly can be realized by rotating the top helmet and the support column, which is convenient and stable; and, after the height of the support assembly is adjusted, the support assembly can exert a stable force on the tested vehicle, so that the tested vehicle The vehicle is more stable and the testing process is safer.

For the above-mentioned base, it can be in various shapes, such as square structure and cylindrical structure. A cylindrical structure is preferred. The base and the support column are threaded. There is no limit to the way of threaded connection. For example, the support column is cylindrical, and its copper inner wall has internal threads, and the base has a protruding column with external threads on its surface, and the internal threads and external threads are mated and connected. However, according to the present invention, in order to further improve the stability of the support assembly when supporting, preferably, the outer surface of the support column has external threads, and the base has internal threads. Specifically, the above-mentioned threads can be coarse threads or rectangular thread. The above-mentioned internal thread and external thread are matched and connected. That is, the support column "slips into" the base.

In the above case, the support column is a cylindrical structure.

At the same time, a top helmet is also fixed on the upper end of the support column, and the top helmet is used to contact the supported object and exert an upward force on the supported object.

The top helmet is fixed with the support column, and the rotation of the top helmet drives the rotation of the support column. The top helmet has a top helmet adjustment hole for rotating the top helmet and the support column. The top helmet can be driven to rotate through the top helmet adjustment hole. Specifically, for example, a rigid stick is inserted into the top helmet adjustment hole, and the rigid stick is pushed to drive the top helmet to rotate.

The top helmet can be in various structures, such as cylinder structure, square structure.

According to the present invention, the adjustment hole of the top helmet is arranged on the side wall of the top helmet.

In order to facilitate the rotation of the top helmet, the top helmet adjustment holes are evenly distributed in the circumferential direction of the top helmet side wall. Especially when the top helmet has a cylindrical structure, the top helmet adjustment holes evenly distributed in the circumferential direction divide the circumference into a plurality of equal circular arcs. During the rotation process, every time a top helmet adjustment hole is turned, the rotation angle of the top helmet can be obtained. For example, there are n uniformly distributed top helmet adjustment holes, and the 360° circle is divided into n equal angles (for example, recorded as the first angle).

According to the present invention, the side wall of the base has a base adjustment hole for rotating the base. At this time, the support height of the support assembly can also be controlled by the rotation of the rotating base.

Similar to the uniform distribution of the aforementioned top helmet adjustment holes in the circumferential direction of the top helmet side wall, the base adjustment holes are evenly distributed on the base side wall. Similarly, for example, there are m uniformly distributed base adjustment holes, and the 360° circle is divided into m equal angles (for example, recorded as the second angle). When rotating the top helmet and support column, with reference to the base adjustment holes evenly distributed in the circumferential direction of the side wall of the base, rotate a certain top helmet adjustment hole to the position of the adjacent top helmet adjustment hole, and you can quickly know the rotation value. Angle (first angle), high rotation accuracy. When a plurality of supporting components are used simultaneously, it is convenient to control that all supporting components have the same jacking height.

There is no special requirement on the number of the above-mentioned top helmet adjustment holes and base adjustment holes. Preferably, there are 3-8 adjustment holes for the top helmet and 3-8 adjustment holes for the base. Further preferably, there are 4-6 adjustment holes for the top helmet, and 4-6 adjustment holes for the base. Wherein, the number of the top helmet adjustment holes and the base adjustment holes is too many, which will reduce the strength of the support assembly, and the number is too small, which is not conducive to rotating the top helmet adjustment holes and the base adjustment holes.

More preferably, the number of the top helmet adjustment holes and the base adjustment holes is different. At this time, the angle between the radii of the adjacent two top helmet adjustment holes (the first angle) and the angle between the radii of the adjacent two base adjustment holes (The second angle) is different. During the rotation process, you can use a certain base adjustment hole as a reference to rotate a certain top helmet adjustment hole to the position of the adjacent top helmet adjustment hole. At this time, the top helmet rotates by the first angle. It is also possible to use a certain base adjustment hole as a reference to rotate a certain top helmet adjustment hole to the corresponding position of the base adjustment hole adjacent to the aforementioned base adjustment hole. At this time, the top helmet has rotated a second angle. Through the optional multi-angle adjustment, the rotation angle of the top helmet can be controlled more precisely.

At the same time, on the basis of obtaining the height of the support column and the thread pitch of the base, the rotation angle of the support column (that is, the rotation angle of the top helmet) can be obtained to accurately obtain the height of the top helmet. The support height of the device is very favorable.

For the height of the base, the support column and the top helmet, there is not much restriction in the present invention, only the total minimum height of the support assembly (that is, when the support column is screwed into the deepest part of the base) is less than the distance between the vehicle under test and the test bench. The distance and the total maximum height of the support assembly (that is, when the support column is unscrewed from the highest point of the base) should be greater than the distance between the chassis of the vehicle under test and the test bench. Those skilled in the art can make selections and adjustments according to actual needs.

In the test bench disclosed by the present invention, the sling assembly includes a sling body, a plurality of upper flexible slings and a plurality of lower flexible slings; the sling body is a frame, and the sling body has the same The upper connecting portion and the lower connecting portion having the same number as the lower flexible sling, the plurality of upper connecting portions are distributed in a fixed polygon, and the plurality of lower connecting portions are distributed in a fixed polygon; one end of the upper flexible sling is connected to the upper One end of the lower flexible sling is fixedly connected to the lower connection part, and the other end is used to connect the object to be tested; the lengths of the upper flexible sling and the lower flexible sling are independently adjustable.

The hanger assembly disclosed in the present invention can be used to predict which direction the center of gravity of the object to be hung is biased, and to place the hanger in this direction through coarse adjustment (before lifting, adjust the length of the upper flexible sling). Move, shorten the distance from the hanging head to the connecting part in this direction (that is, shorten the length of the upper flexible sling)), so that after hoisting, the object to be hoisted is in a roughly horizontal state, but usually at this time, it is still in an unbalanced state. Then perform fine adjustment (after lifting, adjust the length of the flexible sling), and adjust the object to be hoisted to a stable horizontal state. Moreover, in the process of adjusting the lower flexible sling, due to the supporting effect of the sling body, the object to be hoisted is more stable, and the hoisting process is safer.

Moreover, the positions of the upper connecting part and the lower connecting part on the spreader body will not change, combined with the supporting function of the connecting body, only the length of the lower flexible sling will be changed during the fine adjustment process, and the lower flexible sling and the lower flexible sling will not be changed. The objects to be hung generate friction, which avoids damage to the objects to be hung. In addition, the spreader assembly has a small footprint for easy storage and placement.

According to the present invention, there are multiple upper flexible slings, and the sling body has multiple upper connecting parts, and the number of the upper flexible slings is the same as the number of the upper connecting parts. The plurality of upper connecting parts are distributed in a fixed polygon. In order to form a polygon, that is, there are at least three upper connecting parts and upper flexible slings. Further, in order to make the hoisting process more stable, the position of the upper connection part on the sling body can make the center of mass of the object to be tested be located within the polygon formed by the plurality of upper connection parts during the hoisting process. Likewise, there are multiple lower flexible straps. The quantity of the lower flexible suspenders is the same as the quantity of the lower connecting parts. The plurality of lower connecting parts are distributed in a fixed polygon. In order to form a polygon, that is, there are at least three lower connecting parts and lower flexible straps.

In the present invention, there are four upper flexible slings, and the four upper connecting parts are distributed in a quadrangular shape; there are four lower flexible slings, and the four lower connecting parts are distributed in a quadrangular shape. At this time, the lifting process can be made more stable.

For the above-mentioned spreader body, its shape is not too limited, preferably a symmetrical circular or rectangular structure.

According to the present invention, there are many ways to connect the upper flexible sling to the lifting device. For example, the end of the upper flexible sling has a sling ring, and the sling ring can be placed on the hook of the lifting device, which is not limited in the present invention. According to the present invention, preferably, the sling assembly further includes a hanger for connecting the lifting device; among the four upper flexible slings, the two upper flexible slings opposite along the diagonals of the quadrilateral are integrated to form two An integrated sling; the hanging head is arranged on the integrated sling and can be fixed at different positions on the integrated sling.

In the above structure, the two upper flexible slings are integrated, and the two upper flexible slings can be combined together or one flexible sling can be used, which is regarded as two combined upper flexible slings. At this time, the two integrated slings pass through the suspension head, and each integrated sling is divided into two sections by the suspension head, and the integrated sling from the upper connection part to the suspension head is the upper flexible sling. By changing the position of the hanging head on the integrated sling, it is regarded as changing the length of the upper flexible sling.

Specifically, the hanger includes a frame and a hook connection part fixed on the frame for connecting the lifting equipment. There is at least one clamping beam inside the frame, the frame on one side of the clamping beam, the clamping beam, and the other side of the clamping beam. The side frames are sequentially staggered on both sides of the integrated sling.

According to the above structure, the frame can be in various shapes, such as circle, rectangle and so on. There is a card beam in the middle of the frame. Specifically, the card beam connects the two sides of the frame. For example, in a rectangular frame, the card beam is parallel to the two opposite sides. That is, when there is one card beam, the card beam and the frame form a "day". font" structure. When there are multiple card beams, the multiple card beams are arranged in parallel. For example, when there are two parallel card beams, a "mesh-shaped" structure is formed between the card beams and the frame. When there are more than two card beams, the structure of the card beam and the frame can be deduced by analogy. For example, when there are two card beams, it is recorded here as the first card beam and the second card beam, the frame on one side of the card beam (such as the first card beam), the first card beam, the second card beam, and the card beam (For example, the frame on the other side of the first card beam) is alternately located on both sides of the integrated sling in turn, that is, the integrated sling passes downward between the first card beam and the frame on one side of the first card beam, and bypasses the The first card beam passes upwards from between the first card beam and the second card beam, and then bypasses the second card beam, and passes through the frame on the other side of the second card beam and the first card beam (that is, away from the first card beam) beam, and the frame adjacent to the second card beam) upwards.

At the same time, the hook connecting part is fixed on the frame and is used for connecting the lifting equipment. For this structure, those skilled in the art can adopt various common structures to realize, for example, the hook connecting part and the frame form a ring, and the plane where the hook connecting part is located is perpendicular to the plane where the frame is located.

Among the aforementioned various structures, the upper connection part and the lower connection part can adopt various common structures, as long as the upper flexible sling and the lower flexible sling can be connected to the spreader body. According to the present invention, preferably, the upper connecting portion is an upper connecting shaft, and the upper flexible sling is connected to the upper connecting shaft. For example, the end of the upper flexible sling is a collar, the upper connecting shaft is located in the collar, and the upper flexible sling can rotate around the upper connecting shaft. Likewise, the lower connecting portion is a lower connecting shaft, and the lower flexible sling is connected to the lower connecting shaft.

According to the present invention, when there are four upper flexible slings, the sling body has four connecting shafts, and the connecting shafts serve as the upper connecting portion and the lower connecting portion at the same time; the four upper flexible slings are respectively connected to the four connecting shafts, And the four lower flexible suspenders are respectively connected to the four connecting shafts.

That is, at this time, the upper connecting portion and the lower connecting portion are overlapped, and the connecting shaft is simultaneously used as the upper connecting portion and the lower connecting portion. Both the upper flexible sling and the lower flexible sling are connected to the connecting shaft.

In order to achieve a better balance and stable lifting effect, further, the four connecting shafts are distributed in a fixed square.

The upper flexible sling can be directly connected to the connecting shaft, or can be connected to the connecting shaft through a high suspension, that is, one end of the high suspension is connected to the upper flexible suspension, and the other end is connected to the connecting shaft, and can rotate around the connecting shaft. Likewise, the lower flexible sling can be connected directly or with a low suspension to the connecting shaft. Preferably, the sling assembly also includes four high hangers and four low hangers; one end of the high hangers is connected to the upper flexible sling, one end is connected to the connecting shaft, and can rotate around the connecting shaft, and one end of the low hangers It is connected with the lower flexible sling, and one end is connected with the connecting shaft, and can rotate around the connecting shaft.

When the high suspension and the low suspension are connected to the connecting shaft at the same time, shaft sleeves can be provided on the high suspension and the low suspension, and the connection shaft is simultaneously passed through the shaft sleeves of the high suspension and the low suspension. High hanging and low hanging can be independently rotated around the connecting shaft.

The length of the lower flexible sling can be adjusted in various ways. Further, the sling assembly also includes four hoisting ratchet mechanisms. The hoisting ratchet mechanisms are fixed on the lower sling and fixedly connected to the end of the lower flexible sling. The length of the lower flexible suspenders can be adjusted.

Specifically, as known to those skilled in the art, the hoisting ratchet mechanism can realize the one-way rotation of the ratchet. In the present invention, the one-way rotation of the ratchet can control the change of the length of the lower flexible sling.

According to the present invention, the end of the lower flexible sling away from the hoisting ratchet mechanism is detachably and fixedly connected to the ring belt. The loop is used to connect the object to be tested.

As mentioned above, the above-mentioned test bench also includes additional functional components such as a grating ruler for measurement, an angle meter, an electric cylinder body, an electric cylinder connector, a binding assembly, and a supporting assembly for connecting various components and achieving different postures. . Since the above-mentioned additional functional components are relatively small in weight relative to the main body of the stand (including the swing plate, sliding plate, turntable, and turning plate), the impact on the test results is relatively small, and in the present invention, it can be ignored. .

Referring to the accompanying drawings, Figs. 1-6 show a preferred embodiment of the test bench disclosed in the present invention.

The test bench includes the host and bundled components.

The main engine includes a base 13, a swing assembly fixed on the base 13, a sliding assembly, a rotating assembly and a turning assembly;

The swing assembly includes a base 13, two brackets 11 are fixed at the left and right ends of the base 13, and a cantilever 12 extends from the top of the two brackets 11 respectively, and the two cantilever arms 12 are arranged facing each other, as shown in FIG. 3 . That is, the left cantilever 12 in FIG. 1 extends from the left support 11 toward the right support 11 , and similarly, the right cantilever 12 is set from the right support 11 toward the left support 11 .

A fixed block 31 is fixed on the top of the cantilever 12, and the top of the fixed block 31 has a knife edge protruding upward. The upper surface of the knife edge is two intersecting planes, namely the first side 311 and the second side 312 . The intersection line of the first side 311 and the second side 312 is the swing axis 33 . As shown in FIG. 7 , in this embodiment, the angle formed by the first side 311 and the second side 312 is 90°.

A swing block 32 is arranged on the fixed block 31 . The swing block 32 has a notch at the bottom, and the notch surfaces are two intersecting planes, ie the third side 321 and the fourth side 322 . The intersection line of the third side 321 and the fourth side 322 is collinear with the swing axis 33 . As shown in FIG. 6 , in this embodiment, the angle formed by the third side 321 and the fourth side 322 is 120°. The top of the knife edge is at the bottom of the notch. Specifically shown in Figure 5.

Referring to FIG. 2 , the top end of the swing block 32 is fixed on the connecting plate 22 . Two swing arms 21 extend downward from the two ends of the connecting plate 22 in a direction perpendicular to the swing axis 33 , and two swing arms 21 extend from the two connecting plates 22 on the two brackets 11 , and there are four swing arms 21 in total. , the four swing arms 21 are fixedly connected to opposite ends of the swing plate 23 to fix the swing plate 23 .

As shown in FIG. 1 , the swing plate 23 is a square plate. There is also a square sliding plate 5 on it, and the sliding plate 5 and the pendulum plate 23 are connected by slide rails arranged in the front and rear directions, and the sliding plate 5 can slide along the slide rails (not shown in the figure). Moreover, an electric cylinder block 51 is fixed on the swing plate 23 , and an electric cylinder connector 52 is fixed on the sliding plate 5 , and the electric cylinder block 51 and the electric cylinder connector 52 are mated and connected. At the same time, a grating ruler 53 is also arranged on the swing plate 23 to read the moving distance of the slide plate 5 .

In addition, an inclinometer 231 is provided on the swing plate 23 for measuring the swing angle of the swing plate 23 .

A periodometer 232 is arranged above the base 13 and below the swing plate 23 for measuring the swing period of the swing plate 23 .

A turntable 6 is fixed above the slide plate 5, the slide plate 5 and the turntable 6 are connected by a rotating track, and the turntable 6 can rotate along the turn track (not shown in the figure).

There are four lower mounts 72 distributed in a rectangular shape above the turntable 6 . The longitudinal direction of the rectangle is the front-back direction. Specifically referring to FIG. 4 , each triangular lower mounting seat 72 is connected to a triangular upper mounting seat 73 through a hinge shaft 74 . The upper mount 73 is fixed on the bottom of the turning plate 71 . The turning plate 71 is used to fix the passenger car 8 , and in the figure, the passenger car 8 is used as the passenger car 8 . As can be seen in FIG. 4 , the tire 81 of the passenger car 8 is located on the turning plate 71 above the upper mounting seat 73 and the lower mounting seat 72 .

When it is necessary to turn over and tilt to the left, the hinge shaft 74 on the right side and the upper mounting base 73 and the lower mounting base 72 on the right side can be disassembled, and the right side of the turning plate 71 can be lifted by the lifting equipment to make it tilt, and then use The supporting rod 75 is supported between the turntable 6 and the right side of the turntable 71, and fixes the turntable 71 to keep it in an inclined state.

Taking the vertical direction where the geometric center of the wobble plate 23 is located as the centerline, the structures of the wobble plate 23 , the sliding plate 5 , the turntable 6 , and the turning plate 71 are respectively axisymmetric to the center line. That is, the centers of mass of the wobble plate 23 , the sliding plate 5 , the turntable 6 , and the turning plate 71 are located on the center line, and when the turntable 6 rotates, the center of mass of the turntable 6 remains unchanged.

Refer to Fig. 7-Fig. 11 for the structure of the above bundled components.

Figure 7 discloses a preferred embodiment of the binding assembly provided by the present invention, including a base plate 1111, the two ends of the base plate 1111 respectively extend from a first side wall 1112 and a second side wall 1113, and the first side wall 1112 and the second side wall 1113 are located on the upper side of the substrate 1111 . That is, the substrate 1111 together with the first sidewall 1112 and the second sidewall 1113 form a “concave” structure.

A binding ratchet mechanism 112 is fixed on the outer side of the first side wall 1112 (with the groove in the "concave" structure as the inside, and the direction away from the first side wall 1112 and the second side wall 1113 as the outside). The binding ratchet mechanism 112 is connected with the connecting end of the binding belt 113, and the stretched length of the binding belt 113 can be adjusted through the binding ratchet mechanism 112.

The free end of the binding band 113 has a connecting sleeve 1131 , and the positioning shaft 114 is sleeved in the connecting sleeve 1131 .

Refer to FIG. 11 for the specific structure of the positioning shaft 114 , which includes a positioning shaft body 1141 and a positioning cap 1142 , and the positioning caps 1142 are located at both ends of the positioning shaft body 1141 . Both the positioning shaft 114 and the positioning cap 1142 are cylindrical, and the diameter of the cross section of the positioning cap 1142 is larger than the diameter of the cross section of the positioning shaft 114 . A protrusion 1143 extends axially from the positioning cap 1142 at one end of the positioning shaft body 1141 along the positioning shaft body 1141 . When the positioning shaft 114 is sleeved in the connecting sleeve 1131 , the positioning shaft body 1141 is sleeved in the connecting sleeve 1131 , and the positioning caps 1142 at both ends of the positioning shaft body 1141 are located outside the positioning cap 1142 .

A positioning seat 115 is fixed on the outer side of the second side wall 1113 , and a positioning shaft mounting hole 1151 is opened on the positioning seat 115 . Refer to Fig. 9 for the specific structure of the positioning seat 115. The positioning seat 115 is provided with a positioning shaft mounting hole 1151. The positioning shaft mounting hole 1151 includes a circular positioning introduction hole 11511 and a positioning hole 11512. The diameter of the positioning introduction hole 11511 is larger than the positioning hole. Hole 11512. The positioning hole 11512 communicates with the positioning introduction hole 11511 , and the width of the connection is greater than the diameter of the positioning shaft body 1141 .

Moreover, the diameter of the positioning introduction hole 11511 is larger than the diameter of the positioning cap 1142 , and the diameter of the positioning hole 11512 is smaller than the diameter of the positioning cap 1142 .

The structure of the above-mentioned limiting device 4 is shown in Fig. 12-Fig. 16 .

Fig. 12 and Fig. 13 show a preferred embodiment of the limiting device 4 disclosed in the present invention. Specifically, the limiting device 4 includes a base 411 , and two ends of the base 411 respectively extend a first support seat 412 and a second support seat 413 to the upper side of the base 411 . Both the first supporting base 412 and the second supporting base 413 have mounting holes for a rotating shaft 422 , and the rotating shaft 422 is fixed on the first supporting base 412 and the second supporting base 413 through the mounting holes of the rotating shaft 422 .

At the same time, the first supporting seat 412 and the second supporting seat 413 respectively extend from the two ends of the rotating shaft 422 . The rotating shaft 422 extends out of the first support seat 412 to form a hand wheel 421 . The rotating shaft 422 extends out of the second supporting base 413 , and its circumferential sidewall has four positioning holes 11512 evenly distributed around the rotating shaft 422 .

A latch seat 441 is installed on the side wall outside the second support seat 413 , and the latch seat 441 is located below the rotating shaft 422 . The pin seat 441 has a pin 442 inside, and the pin 442 can be inserted into the positioning hole 11512 on the rotating shaft 422 and can also be pulled out from the positioning hole 11512 .

Two limiting rotary blocks 43 are fixed on the rotating shaft 422 between the first supporting base 412 and the second supporting base 413 .

The structure of the limit turning block 43 is shown in Figures 14-16. In this embodiment, the limit turning block 43 includes a circular base block 431 and a first limit block 432, a second stop block 432 fixed on the base block 431 in sequence. The limiting block 433 and the third limiting block 434 . The first limit block 432, the second limit block 433, and the third limit block 434 are all arranged along the radial direction of the circular base block 431, that is, one end of the three limit blocks faces the center of the circle, and the other end extends to the circumference of the base block 431 edge.

The first limiting block 432 , the second limiting block 433 , and the third limiting block 434 respectively have thicknesses that decrease in order. Wherein, the first limiting block 432 and the third limiting block 434 are opposite and located on the same diameter, and the second limiting block 433 is perpendicular to the first limiting block 432 and the third limiting block 434 at the same time.

In this embodiment, on the same base block 431 , the thickness of the area opposite to the second limiting block 433 is the thickness of the base block 431 . At this time, it can also be considered that there is a "fourth limiting block" with a thickness of 0.

On the corresponding limit device 4, the distance between the two first limit blocks 432 is the limit width of the first limit block 432; the distance between the two second limit blocks 433 is the second limit width. The spacing width of the bit block 433; the distance between the two third spacing blocks 434 is the spacing width of the third spacing block 434; the distance between the two base blocks 431 is the "fourth spacing" block" limit width.

The limiting device 4 is fixed on the base 13 below the swing plate 23 , so that the limiting beam 45 below the swing plate 23 is in the limiting area of the limiting device 4 .

The structure of the support assembly 9 mentioned above is shown in Fig. 17-Fig. 18 .

Referring specifically to Fig. 17 and Fig. 18, a preferred embodiment of the support assembly 9 disclosed in the present invention is shown.

As shown in the figure, the support assembly 9 includes a base 91 , which is a cylindrical structure, and four base adjustment holes 911 are evenly distributed on the circumference of the side wall of the base 91 . There is a recessed hole in the base 91, and the inner wall of the recessed hole is an internal thread.

The support column 92 is a cylindrical structure, and the side wall of the support column 92 has an external thread matched with the internal thread. The lower end of the support body is inserted into the base 91 , and the external thread is matched with the internal thread, so that the rotation of the support body can control the height of the support body protruding from the base 91 .

A top helmet 93 is fixed on the upper top of the support body, and the top helmet 93 is used to contact and support the passenger car 8 .

The top helmet 93 is also a cylindrical structure, and four top helmet adjustment holes 931 are evenly distributed on the circumference of the side wall.

Refer to Fig. 19-Fig. 23 for the structure of the above-mentioned sling assembly.

Fig. 19 shows the state of the sling assembly disclosed in the present invention during hoisting. It can be seen from Fig. 19 that the sling assembly disclosed in the present invention includes a lifting head 101, an upper flexible sling, a high sling 105, a sling body 103, a low sling 106, a lower flexible sling 104, a lifting ratchet mechanism 107, and an endless belt 108 .

Refer to Figure 21 and Figure 22 for the specific structure of the suspension head 101. In this embodiment, the suspension head 101 includes a frame 1011, which is circular. A card beam 1012 is fixed on the frame 1011, both ends of the card beam 1012 are fixed on the frame 1011, and the frame 1011 and the card beam 1012 form a "day-shaped" structure. Simultaneously, the hook connecting portion 1013 is also fixed on the frame 1011, the two ends of the hook connecting portion 1013 are fixed on the frame 1011, the hook connecting portion 1013 forms a ring with the frame 1011, and the plane where the hook connecting portion 1013 is located is the same as the frame 1011. The plane is vertical.

Returning to FIG. 19 , during hoisting, the hook 1091 of the lifting device hooks the hook connection portion 1013 of the lifting head 101 .

In the embodiment shown in Figure 19, there are two integrated slings 102, the left side frame of the card beam 1012, the card beam 1012, and the right side frame of the card beam 1012 are alternately located on both sides of the integrated sling, specifically: the integrated sling 102 is on the frame Above the plane where 1011 is located, passes between the card beam 1012 and its left frame and extends to below the plane where the frame 1011 is located, then bypasses the card beam 1012, passes between the card beam 1012 and its right frame and extends to above the plane where the frame 1011 is located . The two integrated slings 102 are connected to the suspension head 101 through the above structure, and the suspension head 101 can be fixed at any position on the integrated sling 102 through the friction force between the integrated suspension belt 102 and the frame 1011 of the suspension head 101 and the card beam 1012. When the position of the hanging head 101 on the integrated sling 102 needs to be changed, the integrated sling 102 can be pulled up at the position of the card beam 1012 along the plane direction where the vertical frame 1011 is located, and the hanging head 101 can be placed on the integrated sling 102 by moving the hanging head 101 position is adjusted.

According to the present invention, with the suspension head 101 as the end point, the two integrated suspenders 102 are divided into four upper flexible suspenders. The length of the upper flexible sling can be realized by moving the position of the aforementioned suspension head 101 .

The four upper flexible slings have four ends each fixedly connected to one end of a high hanger 105 . A high lift 105 is connected to the spreader body 103 .

Refer to Figure 23 for the specific structure of the spreader body 103. In this embodiment, the spreader body 103 is circular and specifically includes two concentric rings, and the two concentric rings are fixed to each other. As understood by those skilled in the art, The spreader body 103 can also be in other shapes, such as a rectangle. As shown in FIG. 23 , with the center of the circular spreader body 103 as the center, four connecting shafts 1031 are symmetrically distributed on the spreader body 103 . Both ends of the connecting shaft 1031 are fixed on two concentric rings of the spreader body 103 . Moreover, the axes of the connecting shafts 1031 pass through the center of the circle of the spreader body 103, that is, the four connecting shafts 1031 are divided into two groups of coaxial connecting shafts 1031, and the axes where the two groups of coaxial connecting shafts 1031 are located are perpendicular to each other. Four points formed by the intersection of the four connecting shafts 1031 and the outer ring of the spreader body 103 form a square.

Returning to Fig. 19, the connecting portion between the high crane 105 and the spreader body 103 is the upper connecting portion. In this embodiment, the upper connecting portion is the above-mentioned connecting shaft 1031 , one end of the four high suspensions 105 is fixedly connected to the upper flexible sling, and the other end is fixed on the connecting shaft 1031 and can rotate around the connecting shaft 1031 .

At this moment, when the lifting head 101 is lifted, the spreader body 103 can be lifted by the upper flexible sling.

Similarly, those skilled in the art can use three independent upper flexible slings according to the idea of the present invention, one end is connected to the upper connection part of the spreader body 103, and the other end is connected by an adjustable length device (such as a ratchet or a rope tightener). to the hook 1091.

Continuing to refer to Fig. 19, four low hangers 106 are fixed on the spreader body 103, and the connection between the low hangers 106 and the spreader body 103 is the lower connection portion. connecting part. One ends of the four low hangers 106 are fixedly connected to the four connecting shafts 1031 respectively, and can rotate around the connecting shafts 1031 .

Referring to FIG. 20 , one end of each of the four low suspensions 106 is fixedly connected to the four connecting shafts 1031 , and the other end is fixedly connected to the four lifting ratchet mechanisms 107 respectively. Four hoisting ratchet mechanisms 107 are connected with four lower flexible suspenders 104 at the same time. One end of the lower flexible sling 104 is fixed in the hoisting ratchet mechanism 107 . The one-way rotation of the hoisting ratchet mechanism 107 can control the length of the lower flexible sling 104, that is, the ratchet is rotated, and the hoisting ratchet mechanism 107 winds and packs the lower flexible sling 104, thereby shortening the length of the lower flexible sling 104.

One end of each of the four lower flexible slings 104 is respectively fixed in the four hoisting ratchet mechanisms 107 , and an endless belt 108 is detachably connected to the other end. It is fixedly connected to the passenger vehicle 8 via the endless belt 108 .

In this embodiment, the aforementioned upper flexible sling and lower flexible sling 104 are all made of nylon flat belts, which are flexible and strong.

Below, take the passenger car 8 as the object to be tested to illustrate the working process of the test bench test centroid disclosed by the present invention:

Usually, the test of the passenger car 8 will be based on the following working conditions, namely: Working condition 1 - no turning and no turning over (Figure 25 and Figure 28); working condition 2 - turning left and not turning over (Figure 27) ; Working condition 3-turn left and turn left (not shown); Working condition 4-do not turn and turn left (Figure 24); Working condition 5-do not turn right and turn (Figure 26); Working condition 6-turn right and turn right ( not shown); working condition 7-turning right without overturning (Figure 29); working condition 8-turning right and turning left (not shown); working condition 9-turning left and turning right (not shown).

In the center of mass test, for the left center of mass vehicle, working conditions 1, 2 and 3 can be used for testing; for the right center of mass vehicle, working conditions 1, 6 and 7 can be used for testing.

Moreover, in this test, on the test bench, when the angle of the swing plate 23 measured by the goniometer 231 is 0, there is a gap between the limiting beam 45 and the two limiting rotary blocks 43 .

Taking the space position of the center of mass of the turntable as the origin (that is, the origin does not change with the turnover of the turntable), the upward direction from the origin along the center line is the Z axis, and the forward direction from the origin (in Figure 1, the direction of the front of the passenger car 8) is X axis, from the origin to the left (the left side of passenger car 8 in Figure 1) is the Y axis, and a three-dimensional coordinate system is established. The coordinates of the center of mass of the passenger car 8 in the three-dimensional coordinate system are marked as C(X _c , Y _c , Z _c ).

Then, the passenger car 8 is hoisted onto the test stand to start the test.

The first step is to rotate the rotating shaft 422 to make the actual limit width of the limit device 4 the smallest (the group of limit blocks with the smallest limit width are located on both sides of the limit beam 45, and the limit beam 45 acts as an actual limit. ), and fixed, the specific process is as follows:

Loosen the pin 442 so that it is not inserted into the positioning hole 11512, turn the hand wheel 421, adjust the limit turning block 43 to minimize the actual limit width, and insert the pin 442 into the corresponding positioning hole 11512. Fix the limit width.

In the second step, the passenger car 8 is hoisted by the sling assembly, and placed on the turntable 71 of the test bench, the specific process is as follows:

Adjust the hanging head 101 to an appropriate position on the integrated sling 102 (realize the effect of adjusting the length of the upper flexible sling). The specific method can be: estimate which direction the center of gravity of the passenger car 8 is biased (for example, the powertrain of a general passenger car 8 is located in front of the vehicle, so the center of gravity of the passenger car 8 is usually biased toward the front of the vehicle), and move the hoist 101 towards the vehicle Moving in the forward direction shortens the length of the upper flexible sling in that direction.

The four endless belts 108 are fixed on the four lower flexible suspenders 104, and are respectively placed on the four wheels of the passenger car 8.

Adopt hoisting equipment to hook the suspension head 101 and start hoisting. The suspension hook 1091 catches the suspension head 101 and slowly rises, the suspension head 101 drives the upper flexible sling to rise, and the upper flexible sling drives the sling body 103 to rise. Then the passenger car 8 is hoisted by the low hoist 106 , the hoisting ratchet mechanism 107 , the lower flexible sling 104 , and the ring belt 108 fixed on the sling body 103 .

At this time, the vehicle is usually in an unbalanced state, and the length of the lower flexible sling 104 is adjusted through the hoisting ratchet mechanism 107 to slowly restore the passenger car 8 to a horizontal balanced state.

Slowly move the passenger car 8 to the top of the turning plate 71 of the test stand by the lifting device. Then control the hoisting device to slowly drop the passenger car 8 on the turning plate 71 .

The third step is to bind the tires 81 of the passenger car 8 with a binding assembly, so that the passenger car 8 is fixed on the turning plate 71, and the specific process is as follows:

Filling blocks 117 are inserted between the first sidewall 1112 and the wheel and between the second sidewall 1113 and the wheel to make the tire 81 more fixed in the lateral direction.

Then the free end of the traction binding band 113 passes through the gap between the tire 81 wheel hub and the brake pad, so that the free end of the binding band 113 is located near the positioning seat 115 outside the second side wall 1113 .

With the projection 1143 of the positioning shaft 114 as the front end, the positioning shaft 114 is penetrated from the positioning guide hole, and at the same time penetrates into the connecting sleeve 1131 at the free end of the binding band 113, and then the binding band 113 is tightened so that the positioning shaft body 1141 moves from the The positioning introduction hole 11511 enters the positioning hole 11512, and the positioning shaft body 1141 is fixed in the positioning hole 11512 under the action of tension.

Turn the binding ratchet mechanism 112 to shorten the length of the binding belt 113 and tighten the binding belt 113 so that the binding belt 113 firmly fixes the tire 81 on the base plate 1111 .

The fourth step is to use the support assembly 9 to support the passenger car 8. The specific process is as follows: the support assembly 9 is placed on the turning plate 71, and it is located under the vehicle body at the wheel, and a rigid stick, such as a steel rod, is inserted into the Top helmet adjustment hole 931, rotate the top helmet 93, raise the top helmet 93, make the slowly rising top helmet 93 contact the vehicle body, and then continue to rotate the top helmet 93 to make it rise to a certain height (by referring to The position of the base adjustment hole 911 or the top helmet adjustment hole 931, rotate the top helmet 93 at a certain angle, such as 90°), so that the support assembly 9 can stably support the tested vehicle and ensure safety.

The fifth step is to measure the center of mass of the passenger car 8, the specific process is as follows:

In the above state, since the center of mass of the passenger car 8 is usually not in the vertical plane where the swing axis 33 is located, the entire system is in an unbalanced state, and the wobble plate 23 on which the passenger car 8 is fixed above will be generated in the front-rear direction under the action of gravity. swing away from the original position. At this time, the platform needs to be leveled under the monitoring of the goniometer, that is, through the action of the electric cylinder body 51 and the electric cylinder connector 52, the slide plate 5 is driven to slide, and the angle of the swing plate 23 shown by the goniometer 231 is At 0 o'clock, that is, the swing plate 23 is horizontal and returns to the original position (working condition 1, Figure 25, Figure 28). At this time, the sliding plate 5 is controlled to stop moving, and the sliding distance of the sliding plate 5 is recorded.

Drive turntable 6 to rotate. Due to the deflection of the passenger car 8, its center of mass moves, and the swing plate 23 will deviate from the original position again. Follow the above-mentioned leveling process again to return the swing plate 23 to the original position (working condition 2, Figure 27). After the leveling process, record Slider 5 sliding distance.

Turn the passenger car 8 over again.

According to the above-mentioned leveling process again, the pendulum plate 23 is returned to the original position (working condition 3), and after the leveling process, the sliding distance of the sliding plate 5 is recorded.

Finally, according to the sliding distance of the sliding plate 5 obtained under various working conditions, the angle of rotation of the turntable 6 and the turning angle of the turning plate 71, the center of mass of the passenger car 8 in the above-mentioned three-dimensional coordinate system can be obtained by calculating using the principle of moment balance coordinate.

The principle of calculating the coordinates of the center of mass of the vehicle using the principle of moment balance will be described in detail below.

The system composed of passenger car 8 and test bench is taken as the research object. Taking the vertical line where the midpoint of the swing axis 33 is located as the center line, when the passenger car 8 is fixed on the test bench, since its center of mass is not on the center line, the gravity on the passenger car 8 exists relative to the center line. Moment, counted as the M _car , this moment makes the whole system in an unbalanced state, and the slide plate 5 needs to be slid to level the system. After leveling, the spatial position of the center of mass of the turntable (sliding plate 5+turning plate 6+turning plate 71) changes, and the gravity of the turntable after the position change will also have a moment relative to the center line, which is counted as _M. According to the principle of moment balance, M _vehicles = M _units . According to the torque calculation formula M=F×L (wherein, F is the gravity. L is the distance from the center of mass to the center line), the distance that the sliding plate 5 moves relative to the swing table (measured by the optical scale), the angle of rotation of the turntable 6, and the turntable 71 For the angle of rollover, the vehicle's center of mass X _c , Y _c and Z _c can be calculated below the coordinates of the center of mass of the vehicle. The specific calculation process only involves four arithmetic operations and basic trigonometric functions, which are well known to those skilled in the art and will not be repeated here.

The following briefly introduces the measurement of the moment of inertia of the vehicle.

As known in the prior art: the compound pendulum is also called the physical pendulum. An object of any shape with a mass of m can freely rotate around a smooth horizontal axis. When it is pulled from a naturally drooping static state by a small angle θ (0≤5°) from its equilibrium position, the object will rotate freely around the axis, ignoring air resistance. Swing, such a device is called a compound pendulum. It can be seen from this that the method for testing the moment of inertia of the test bench disclosed in the present invention is actually a compound pendulum method.

The method of calculating the moment of inertia of a rigid body through the compound pendulum method is known. Suppose the center of mass of the compound pendulum is at point C, the distance from C to the horizontal axis is h, and the moment of inertia of the compound pendulum to the horizontal axis is J. Under the action of gravity When the compound pendulum swings at a small angle:

M=-mghsinθ≈-mghθ;

According to the law of rotation: M=Jd ² θ/dt ² ;

Available: (d ² θ/dt ² )+mghθ/J=0;

Let ω=(mgh/J) ^1/2 =2π/T;

Get formula (1): J=mghT ² /(4π ² );

where ω is the circular frequency of the complex pendulum, and T is the swing period of the complex pendulum.

In addition, according to the parallel axis theorem, the moment of inertia J of a rigid body relative to any axis is equal to the moment of inertia J _c of a rigid body relative to an axis passing through its center of mass and parallel to the axis, plus the mass m of the rigid body and the distance d between the two axes The product of squares, namely formula (2): J=J _c +md ² ;

When calculating the moment of inertia of the passenger car 8, first calculate the moment of inertia J of the _bench relative to the swing axis 33 under a certain working condition i according to formula (1) and formula (2), and the passenger car 8 and the test The moment of inertia Jsystem of the _system composed of the stand relative to the swing axis 33 is then calculated according to the following equation (3) to obtain the moment of inertia _Jobject of the passenger car 8 relative to the swing axis 33 .

Formula (3): J _object = J _system - J _platform ;

It can be seen from formula (3) that the moment of inertia of a system relative to a certain axis is equal to the sum of the moments of inertia of the mass modules that make up the system relative to the axis. Therefore, the moment of inertia of the test bench is equal to the sum of the moment of inertia of each mass module (slider, turntable, turning plate, swing arm, swing plate, etc.) that makes up the bench. The moment of inertia of each mass module satisfies formula (1).

After the moment of inertia J _object of the passenger car 8 relative to the swing axis 33 is calculated by formula (3), the parallel axis theorem formula (2) can be used again to calculate the mass center of the passenger car 8 relative to the passenger car 8 and Moment of inertia of an axis parallel to the pivot axis 33 .

According to the present invention, in this test, a plurality of 9 working conditions are selected for testing. According to the above formula (1), in order to obtain the moment of inertia relative to the swing axis 33, it is necessary to obtain the components of the test bench (such as the swing arm 21, the swing plate 23, the sliding plate 5, the turntable 6, the turning plate 71, etc.) The weight of the vehicle 8 and the distance from the respective center of mass to the pivot axis 33 are used. For the above parameters of the test bench itself, it can be obtained when manufacturing the test bench.

During the test, for the sake of safety, the rotating shaft 422 is first adjusted so that the limit width of the limit beam 45 is at a minimum. Then adjust the test bench so that it is in a variety of working conditions, and level the bench. Measure the sliding distance of the sliding plate 5 relative to the swinging plate 23 under various working conditions by measuring tools; then rotate the rotating shaft 422 according to actual needs to adjust the limit width of the limit beam 45 . Finally, the wobble plate 23 is driven to oscillate, and the oscillating period under various working conditions is measured by the period meter 232 .

Finally, by combining the angles between any axis passing through the center of mass of the passenger car 8 (for example, the axis connecting the center of mass of the passenger car 8 and the origin) and the X-axis, Y-axis, and Z-axis, the multiplier can be further calculated. Moments of inertia J _x , J _y , J z and products of inertia J _xy , J _yz , J _xz of the vehicle 8 with respect to the X, Y, and Z _axes .

After the test is completed, according to the aforementioned hoisting method, connect the passenger car 8 to the spreader assembly, then loosen the binding assembly, use the spreader assembly to lift the passenger car 8 and move it to the flat ground.

By adopting the test bench disclosed in the present invention, parameters such as the center of mass and moment of inertia of the passenger car 8 can be quickly and accurately tested through the above method, and the test process is safe.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (10)

1. A test stand, characterized in that it comprises a main frame and a binding assembly, the main frame includes a swing assembly and a turning system; the swing assembly includes a swing plate that can freely swing in the front and rear direction; the turning system is arranged on the swing On the plate, it is used to drive the object to be tested to flip and rotate in the horizontal plane; The host also includes a leveling system for adjusting the wobble plate so that it returns to a balanced position without external force; The binding assembly is arranged on the turning system for fixing the object to be tested; The test bench also includes an inclinometer for measuring the inclination angle of the wobble plate and a cycle meter for testing the swing period of the wobble plate. 2. The test bench according to claim 1, wherein the leveling system comprises a slide assembly, and the slide assembly includes a slide plate arranged on a swing plate and can slide back and forth relative to the swing plate; The test bench also includes gages for measuring the sliding distance of the slider. 3. The test bench according to claim 2, wherein the turning system includes a rotating assembly and a turning assembly; the rotating assembly includes a turntable that is arranged on the sliding plate and can rotate horizontally on the surface of the sliding plate; The turning assembly includes a turning plate arranged on the turntable and capable of tilting left and right relative to the turntable. 4 . The test bench according to claim 3 , wherein the main machine further comprises a base, the swing assembly is fixed on the base; and the binding assembly is arranged on the turning plate. 5. The test stand according to claim 3, characterized in that, the swing assembly comprises two oppositely arranged brackets, fixed blocks are fixedly connected to the brackets, and the fixed blocks protrude upward to form a first side and a second side. Two sides are knife edges on the surface; the swing assembly also includes a swing block, and the bottom end of the swing block is recessed upward to form a notch with the third side and the fourth side as the surface; the swing block is located on the fixed block, and the top of the knife edge is located The bottom end of the notch; the swing blocks are fixedly connected with swing arms, and the opposite ends of the swing plate are fixed on the swing arms; the intersection of the first side and the second side of the knife edge is the swing axis, and the swing axis At the same time, it is the intersection line of the third side and the fourth side; Alternatively, the swing assembly includes two opposite brackets, each of which is fixedly connected with a fixed block, and the fixed block is recessed downward to form a notch with the first side and the second side as the surface; the swing assembly also includes Swing block, the bottom end of the swing block protrudes downward to form a knife edge with the third side and the fourth side as the surface; the swing block is located on the fixed block, and the top of the knife edge is located at the bottom end of the notch; the swing block is fixedly connected with a swing arm The opposite ends of the swing plate are fixed on the swing arm; the intersection of the third side and the fourth side of the blade is the swing axis, and the swing axis is also the intersection of the first side and the second side. 6 . The test bench according to claim 4 , wherein the measuring tool is set on the swing plate; the angle meter is set on the swing plate; and the periodometer is set on the base. 7 . 7. The test bench according to claim 1, wherein the binding assembly comprises a base plate and a binding strap having a free end and a connecting end; the two ends of the base plate respectively extend upwards from the first side wall and the second side wall; the outside of the first side wall and the second side wall are respectively provided with a binding ratchet mechanism and a positioning part; The connecting end of the binding strap is fixedly connected to the binding ratchet mechanism, and the free end of the binding strap is used for detachable fixed connection with the positioning part; the length of the binding strap is adjustable. 8. The test bench according to any one of claims 1-7, characterized in that, the test bench further comprises a limit device, and the limit device comprises a base, a rotating shaft and a limit turn block, The two ends of the base respectively extend a first support seat and a second support seat towards the same side of the base, and the rotating shaft is arranged on the first support seat and the second support seat and is rotatable; the first support seat and the second support seat On the rotating shaft between the support bases, there are two limit turning blocks fixed relative to the rotating shaft for limiting; the two oppositely arranged limit turning blocks have different limit widths; the rotation of the rotating shaft can change the position directly above the rotating shaft. The limit width between the two limit turn blocks; the bottom of the wobble plate is fixed with a limit beam extending in the left and right direction, the limit device is arranged on the base, and the rotating shaft is located in the front and rear direction; the limit The beam is located between the two stop blocks. 9. The test bench according to claim 8, characterized in that, the test bench also includes a support assembly for supporting the object to be tested on the turning plate, the support assembly includes a base and a support column, the support One end of the column is screwed to the base, and the other end is fixed with a top helmet, and the side wall of the top helmet has a top helmet adjustment hole for rotating the top helmet and the support column in the circumferential direction. 10. The test bench according to claim 9, characterized in that, the test bench also includes a hanger assembly for hoisting the object to be tested on the turntable, including a hanger body, a plurality of upper flexible straps and A plurality of lower flexible slings; the sling body is a frame, and the sling body has the same number of upper connecting parts as the upper flexible slings and the same number of lower connecting parts as the lower flexible slings, and the plurality of upper connecting parts form a Fixed polygonal distribution, the plurality of lower connecting parts are distributed in a fixed polygonal shape; one end of the upper flexible sling is fixedly connected to the upper connecting part, and the other end is used to connect lifting equipment; one end of the lower flexible sling is fixed to the lower connecting part The other end is used to connect the object to be hung; the lengths of the upper flexible sling and the lower flexible sling are independently adjustable.

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