CN108263158B

CN108263158B - Special limiting block for reducing freedom degree of twisting seat on spiral spring and mounting structure thereof

Info

Publication number: CN108263158B
Application number: CN201810106035.1A
Authority: CN
Inventors: 马玉坡; 李而康; 郭晓燕; 詹瞻羽; 刘启佳; 王长城; 吴增斌; 左振玉; 廖桐舟; 米召阳; 徐冰; 张文
Original assignee: China North Vehicle Research Institute
Current assignee: China North Vehicle Research Institute
Priority date: 2018-02-02
Filing date: 2018-02-02
Publication date: 2023-06-02
Anticipated expiration: 2038-02-02
Also published as: CN108263158A

Abstract

The invention provides a special limiting block for reducing the freedom degree of a twisting seat on a spiral spring in a wheel type armored vehicle suspension system and a mounting structure thereof. The anti-falling protrusion of the invention is in clearance fit with the vehicle body auxiliary seat, and the inner part of the anti-falling protrusion is in clearance fit with the spiral spring upper twisting seat, thereby being convenient for installation, reducing impact noise, and simultaneously not changing the structures of the vehicle body auxiliary seat and the spiral spring damping system, thereby meeting the interchangeability requirement of the armored vehicle on the spiral spring damping system and the hydro-pneumatic spring damping system.

Description

Special limiting block for reducing freedom degree of twisting seat on spiral spring and mounting structure thereof

Technical Field

The invention relates to a limiting device, in particular to a limiting block for reducing the freedom degree of a twisting seat on a spiral spring in a suspension system of a wheeled armored vehicle.

Background

Automotive suspensions are a generic term for all force-transmitting connections between a vehicle frame (or carrying body) and an axle (or wheel). The main function of the suspension is to transmit the vertical reaction force (supporting force), the longitudinal reaction force (driving force and braking force) and the lateral reaction force of the road surface acting on the wheels and the moment formed by the reaction forces to the frame (or the bearing body) so as to ensure the normal running of the automobile.

The suspension mainly comprises three parts of an elastic element, a guiding device, a damping element (shock absorber) and the like.

The elastic element enables the frame and the axle to be in elastic connection, bears and transmits vertical load, and relieves and suppresses impact caused by uneven road surfaces; the guiding device is used for transmitting longitudinal force, lateral force and moment thereof and ensuring certain movement rules of wheels relative to the frame or the vehicle body; the vibration damper is used for accelerating the damping of vibration and limiting the vibration of the vehicle body and the wheels. Therefore, the three components respectively play roles of buffering, guiding and damping, and the combination of the three components plays a role of common transmission force. In order to prevent excessive lateral tilting of the body during driving or steering on uneven road surfaces, some automobiles are also equipped with auxiliary elastic elements, lateral stabilizers and balance bars.

The elastic elements adopted in the common automobile suspension system mainly comprise a steel plate spring, a coil spring, a torsion bar spring, an air spring, a rubber spring and other structural forms.

Coil springs are widely used in independent suspensions, particularly front wheel independent suspensions. However, in some rear wheel independent suspensions of cars, the elastic element thereof also employs a coil spring. The coil spring has the following advantages compared with the leaf spring: the lubrication is not needed, and the longitudinal installation space required by the device is not large; the spring itself has a small mass. The coil spring itself has no damping effect, and therefore, a damper must be additionally installed in the coil spring suspension. In addition, the coil spring can only bear vertical load, so a guide mechanism must be provided to transmit various forces and moments other than vertical force. The spiral spring is formed by rolling spring steel bars and can be made into equal pitch or variable pitch. The former stiffness is constant and the latter stiffness is variable.

The gas spring is filled with compressed gas in a sealed container, and the compressibility of the gas is used for realizing the spring action. The stiffness of such springs is variable because as the load on the springs increases, the amount of gas in the container is compressed and the gas pressure increases, the stiffness of the springs increases; conversely, when the load decreases, the air pressure in the spring decreases and the stiffness decreases, so that the spring has a relatively ideal stiffness-changing characteristic. The gas spring is provided with an air spring and a hydro-pneumatic spring. The air springs are divided into a bag type and a film type, and the hydro-pneumatic springs comprise a single-chamber hydro-pneumatic spring, a double-chamber hydro-pneumatic spring and a two-stage pressure hydro-pneumatic spring.

In order to improve the flexibility of the suspension system of the wheel type armored vehicle, flexible exchange of the two damping systems of the hydro-pneumatic spring and the spiral spring is needed. Therefore, a mounting support for the pin shaft on the hydro-pneumatic spring is required to be arranged on the vehicle body. However, this increases the freedom of the coil spring damping system, resulting in uncontrolled movement and deformation of the coil spring and even wear of the coil spring and the damper.

The present invention has been made keeping in mind the above problems occurring in the prior art.

Disclosure of Invention

Aiming at the technical problems existing in the prior art, the invention provides a limiting block for reducing the freedom degree of a twisting seat on a spiral spring.

In order to achieve the above purpose, the basic concept of the limiting block provided by the invention is as follows:

a special limiting block arranged in a wheel type armored vehicle suspension system for reducing the freedom degree of a twisting seat on a spiral spring comprises a limiting block main body, wherein a hole is formed in the middle of the main body, the main body comprises a first end part and a second end part which are positioned on two opposite sides of the hole, the first end part and the second end part extend from a first position between the first end part and the second end part to the second end part, and the thickness of the main body is gradually increased, so that the main body forms a limiting curved surface.

Preferably, the first end portion is provided with an anti-falling protrusion, and the anti-falling protrusion is provided on a side portion of the hole of the first end portion, and protrudes upward from the side portion.

Preferably, the edges of the apertures of the first and second ends are provided with outwardly facing recesses.

Preferably, the drop-off preventing protrusions are provided on the side portions of the concave portions.

Preferably, the first position is located at a middle position of the main body.

Preferably, the thickness of the body increases linearly and gradually from the first position to the second end.

Preferably, the protrusion extends to the edge of the first end portion, and the height of the protrusion gradually increases from the edge of the first end portion to the edge of the hole of the first end portion.

Preferably, the height of the protrusions increases linearly from the edge of the first end to the edge of the hole of the first end.

The utility model provides a mounting mechanism among wheeled armored car suspension, mounting mechanism includes that the automobile body attaches seat, spiral spring goes up the hank seat stopper, the shock absorber goes up ball hank, spiral spring goes up hank seat, spiral spring and bumper shock absorber upper limbs, and the automobile body attaches the seat and is fixed in the automobile body through the welding mode, and the bumper shock absorber upper limbs is fixed with spiral spring goes up hank seat through the shock absorber on the ball hank, and spiral spring goes up hank seat and automobile body attached seat hinge, installs the stopper on spiral spring upper portion hank seat, the stopper is the stopper before.

Preferably, the outer width of the limiting block is slightly smaller than the inner width of the vehicle body attaching seat.

The beneficial effects of the invention are as follows:

1) Because the limiting block is provided with the limiting curved surface based on the characteristics of the existing vehicle body support and the spiral spring upper twisting seat, the movement of the spiral spring upper twisting seat can be effectively limited, and the spiral spring upper twisting seat is simple in structure and convenient to install.

2) When the limiting curved surface acts on the vehicle body support, the limiting block can be subjected to the action of outward thrust, and the falling danger exists, so that the limiting block is designed with falling-off preventing protrusions, the local strength can be increased, the limiting block is prevented from being damaged and falling off, and the reliability is improved.

Drawings

FIG. 1 is a three-dimensional block diagram of a stopper of the present invention;

FIG. 2 is a front view of the stop block of FIG. 1;

FIG. 3 is a top view of the stop block of FIG. 1;

FIG. 4 is a schematic diagram illustrating an exemplary application of the stopper mounting structure of the present invention.

In the above figures:

1 is a vehicle body attaching seat; 2 is an adjusting block; 3 is a spiral spring upper twisting seat limiting block; 4, ball twisting on the shock absorber; 5 is a spiral spring upper twisting seat; 6 is a spiral spring; 7 is the upper limb of the shock absorber; 8 is a pin shaft; 9 a first end; 10 a second end; 11 a first position; 12 holes, 13 recesses.

In fig. 2, a is a limited curved surface, and b is an anti-falling protrusion; c is the thickness of the spacer.

In fig. 3, d is the inner width of the positioning block, e is the inner width of the anti-falling protrusion, f is the inner length of the anti-falling protrusion, and g is the outer width of the anti-falling protrusion.

Detailed Description

The following detailed description of specific embodiments of the invention refers to the accompanying drawings, in which:

fig. 1-3 show a specific structure of the stopper of the present invention. As shown in fig. 1-3, a special stopper for reducing the freedom of a twist seat on a coil spring provided in a suspension system of a wheeled armored vehicle comprises a stopper body having a hole 12 provided in the middle thereof, the body having a first end 9 and a second end 10 on opposite sides of the hole 12, and extending from a first position 11 between the first end 9 and the second end 10 to an edge of the second end 10, the thickness of the body gradually increasing so that the body forms a curved surface for limiting.

According to the invention, the limiting curved surface is arranged through the limiting block, so that the limiting curved surface is attached to the vehicle body auxiliary seat, and the function of limiting the spiral spring upper seat is realized.

Preferably, the thickness of the body increases linearly and gradually from the first position to the second end. Through the linear increase of main part thickness, make it attach the seat with the automobile body and laminate more, further realize the spacing function of hank seat on the coil spring.

Preferably, the thickness of the body remains unchanged from the first end edge to the first position.

Preferably, the first end 9 is provided with a drop-preventing protrusion b, which is provided on a side of the hole 12 of the first end 9, protruding upward from the side.

Preferably, the anti-falling protrusion b is disposed at the first end 9, so as to counteract the lateral thrust force applied to the limiting block to the right (refer to the orientation in fig. 4) when the limiting curved surface a and the vehicle body mount 1 collide with each other, and prevent the limiting block from being deformed and falling under the action of the thrust.

Preferably, the edges of the holes of the first end 9 and the second end 10 are provided with outward recesses 13. The limiting block is sleeved on the pin shaft 8 mounting support of the spiral spring upper winch seat 5 through the concave part 13, the limiting block and the pin shaft 8 mounting support form clearance fit, the installation is convenient, the relative position of the limiting block and the vehicle body auxiliary seat is restrained, the extrusion position of the limiting block and the vehicle body auxiliary seat 1 is ensured to be positioned on the limiting curved surface a, and the function of limiting the freedom degree of the spiral spring upper winch seat 5 is achieved.

Preferably, the shape of the concave part 13 is consistent with the pin shaft 8 mounting support of the spiral spring upper twisting seat 5, and the size is slightly larger.

Preferably, the anti-falling protrusion b is provided on an edge of the recess 13. As shown in fig. 1 and 2.

Preferably, as shown in fig. 2, the protrusion b extends to the edge of the first end 9, and the height of the protrusion b gradually increases from the edge of the first end 9 to the edge of the hole 13 of the first end, so that the strength of the protrusion b can be enhanced, and the reliability of the stopper can be further improved.

Preferably, the height of the protrusions b increases linearly from the edge of the first end 9 to the edge of the hole of the first end 9. The specific application and principle of the stopper of fig. 1-3 of the present invention can be further illustrated by fig. 4. Fig. 4 shows the mounting mechanism of the coil spring and the shock absorber in the double-wishbone suspension and the vehicle body attaching seat (the vehicle body attaching seat and wishbone structure meet the mounting requirement of the hydro-pneumatic spring). As shown in fig. 4, the mounting mechanism comprises a vehicle body attached seat 1, an adjusting block 2, a spiral spring upper twisting seat limiting block 3, a shock absorber upper ball twisting seat 4, a spiral spring upper twisting seat 5, a spiral spring 6, a shock absorber upper limb 7 and a pin shaft 9. The auxiliary seat 1 is fixed on the vehicle body in a welding mode, the upper limbs 7 of the shock absorber are fixed with the spiral spring upper twisting seat 5 through the upper ball twisting 4 of the shock absorber, and the spiral spring upper twisting seat 5 is hinged with the vehicle body auxiliary seat 1 through the two adjusting blocks 2 and the pin shaft 8.

After this has been done, it has been found in use that the coil spring 6 and the damper upper limb 7 will dry up, resulting in reduced operational convenience and reduced service life of the product. Through a great deal of research findings of research teams, the cause of the problem is finally found. Mainly because there is the clearance in the up end of spiral spring on hank seat 5 and automobile body attaches seat 1 lower extreme face, when the wheel acts up-and-down, spiral spring 6 and bumper shock absorber 7 compress or lengthen thereupon, and bumper shock absorber upper limbs 7 rotate around bumper shock absorber upper ball hank 4 relative spiral spring on hank seat 5, and spiral spring on hank seat 5 rotates around round pin axle 8 relative automobile body attaches seat 1 simultaneously, and the degree of freedom is too much promptly, can lead to spiral spring 6 and bumper shock absorber upper limbs 7 to take place to be dry. And further influences the interchangeability requirement of the armored vehicle on the spiral spring damping system and the hydro-pneumatic spring damping system.

Thus, research teams have overcome the current drawbacks through extensive research. As shown in FIG. 4, the problem can be solved by adopting the invention shown in FIG. 1, after the spiral spring upper twisting seat 5 and the shock absorber upper limb 7 are installed, the spiral spring upper twisting seat limiting block 3 is installed on the spiral spring upper twisting seat 5, for installation convenience, the thickness c of the limiting block is slightly smaller than the initial gap between the upper end surface of the upper twisting seat 5 and the vehicle body auxiliary seat 1, the inner width d of the limiting block is slightly larger than the distance between the outer end surfaces of two sides of the two adjusting blocks 2, the inner width e and the length f of the falling-off protrusion are slightly larger than the corresponding installation matching size of the upper twisting seat 5, and the outer width g of the falling-off prevention protrusion is slightly smaller than the inner width of the vehicle body auxiliary seat 1. Then the spiral spring upper twisting seat 5 is assembled with the vehicle body auxiliary seat 1 through the two adjusting blocks 2 and the pin shaft 8. According to the invention, the spiral spring upper seat limiting block 3 is designed to limit the relative rotation of the spiral spring upper seat 5 and the vehicle body auxiliary seat 1, and meanwhile, the structures of the vehicle body auxiliary seat and the spiral spring damping system are not changed, so that the interchangeability requirement of the armored vehicle on the spiral spring damping system and the hydro-pneumatic spring damping system is met.

Through a large number of experiments, the problem of dryness of the coil spring 6 and the upper limbs 7 of the shock absorber can be completely solved, the performance and the service life of the product are further improved, and through experiments, the average off-road speed of the product is improved by 30%.

While the invention has been described in terms of preferred embodiments, the invention is not so limited. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.

Claims

1. The mounting mechanism comprises a vehicle body attached seat, a shock absorber upper ball winch, a spiral spring upper winch seat, a spiral spring and a shock absorber upper limb, wherein the vehicle body attached seat is fixed on a vehicle body in a welding mode; the first end part is provided with an anti-falling protrusion, the anti-falling protrusion is arranged on the edge part of the hole of the first end part and protrudes upwards from the edge part; the thickness of the stopper body increases linearly and gradually from the first position to the second end.

2. The mounting mechanism in a wheeled armored vehicle suspension system of claim 1, wherein the sides of the aperture of the first end and the second end are provided with outward recesses.

3. The mounting mechanism in a wheeled armored vehicle suspension system of claim 2, wherein said anti-drop protrusions are disposed on the sides of the recess.

4. The mounting mechanism in a wheeled armored vehicle suspension system of claim 1, wherein said first position is located at a mid-position of the stopper body.

5. The mounting mechanism in a wheeled armored vehicle suspension system of claim 1, wherein the projection extends to the edge of the first end and the height of the projection increases progressively from the edge of the first end to the edge of the aperture of the first end.

6. The mounting mechanism in a wheeled armored vehicle suspension system of claim 1, wherein the height of the protrusions increases linearly from the edge of the first end to the edge of the aperture of the first end.

7. The mounting mechanism in a wheeled armored vehicle suspension system of claim 1, wherein the outer width of the stop block is slightly less than the inner width of the body mount.