CN104568453B - A kind of engine pedestal automatically adjusts centralising device - Google Patents

Abstract

An automatic adjustment and centering device for an engine stand, which relates to the technical field of engine testing, and its main feature is that: a displacement sensor measures the relative displacement between the end face and the circumference of the engine flywheel, and inputs it to the ECU for analysis and processing, and the ECU then sends the engine support to the engine support. Stepping motor 1 and stepping motor 2 send out electric pulse signals, the angular displacement of the stepping motor is converted into the angular displacement of the screw, the screw positioning plate limits the axial displacement of the screw along itself, and finally the angular displacement of the screw rotation is converted into the support The displacement of the cover and the support legs, so as to realize the adjustment of the automatic centering of the engine stand. Compared with the existing stand, it can save manpower and time, save cost, improve the use efficiency of the stand, and prolong the service life of the stand.

Description

An automatic adjustment and centering device for an engine stand

technical field

The invention relates to the technical field of engine testing, in particular to an engine platform centering device.

Background technique

During the bench test, it is necessary to connect the flywheel of the engine to the flange of the dynamometer. In order to ensure the safety of the equipment during the experiment, the engine crankshaft and the crankshaft of the dynamometer are required to have a very high coaxiality, less than 0.2mm. At present, when the bench is centered before the test, tools such as hammers and copper rods are often used to strike the engine support to adjust the centering, so as to achieve the purpose of bench centering. However, in the whole process, the adjustment amount of the engine support is not controlled, and it needs repeated adjustment, measurement, and readjustment. A large proportion of the time directly affects the operating rate of the test equipment. And it will also cause irreversible damage to the stand bracket, reducing the service life.

Therefore, how to provide an engine stand that allows the engine and the dynamometer to be aligned quickly and automatically and accurately without damaging the stand support has become a problem to be solved by those skilled in the art.

Utility model content

The present invention aims to solve the above technical problems, and provides an engine stand device capable of quickly and accurately automatically adjusting and aligning the engine and the dynamometer.

In order to solve the problems of the technologies described above, the technical solution of the present invention is as follows:

An automatic adjustment and centering device for an engine stand, including a displacement sensor 1 for measuring the displacement of the end face of the flywheel of the engine, a displacement sensor 2 for measuring the circumferential displacement of the flywheel, an ECU connected to the displacement sensor, a buzzer connected to the ECU, and an engine support One, engine support two and engine support three, each of the engine support structures is the same, including base 15, support cover 2, support legs 9, chute hole 1 on the support cover 2, 5 on the support legs Chute hole two 26, the bolt fixture 4 that connects chute hole one 5 and chute hole two 26, the engine fixing hole 1 that is located on the support cover, screw hole one 27, the screw that one end matches with screw hole one 27 13. The bevel gear 17 connected to the other end of the screw rod 13, the bevel gear 28 meshing vertically with the bevel gear 17, the gear shaft 23 connected to the bevel gear 2, and the positioning key 13 on the gear shaft 23 The sleeve-10, the stepper motor-28 connected with the sleeve-10, the screw positioning plate-25 welded on both sides of the support leg 9, the screw-3 matched with the screw positioning plate-25 side Positioning groove one 6 on the top, positioning groove three 24 on the gear shaft 23 matched with the other side of the screw positioning plate one 25, and the screw positioning plate one 25 play a role in restricting the screw rod one 3 and the gear shaft 23 The effect of the axial displacement along the respective axial direction, the screw hole 11 on the support leg 9, the screw 18 matched with the screw hole 2, the sleeve 22 connected with the positioning key 13 at the two ends of the screw 18 and the sleeve Three 12, the stepping motor connected with the sleeve two 22 or the sleeve three 12 two, the positioning groove two 19 located in the middle part on the screw two 18, the screw positioning plate two 20 connected with the positioning groove two 19 , limit the plate slot hole 16 on the base 15 of the screw positioning plate two 20, the chute hole three 14 on both sides of the bearing leg 9, the screw positioning hole 17 on the base 15, and the screw fixing that matches with the screw positioning hole 17 Part 21; it is characterized in that: the support cover is connected with the engine through the engine fixing hole; the displacement sensor one and the displacement sensor two are respectively installed on the flange of the dynamometer, and rotates together with the dynamometer shaft; the displacement sensor one measures The axial relative displacement on the end face of the engine flywheel disc, the displacement sensor two measures the relative height and the relative radial displacement on the circumference of the engine flywheel disc; the displacement sensor is connected with the ECU, and the relative displacement measured by the displacement sensor one and the displacement sensor two The displacement is transmitted to the ECU; the ECU is connected to the stepping motor 1 and the stepping motor 2 supported by the engine, and the ECU analyzes and processes the data and generates a pulse wavelength corresponding to the displacement and transmits it to the stepping motor 1 and the stepping motor 2 supported by the engine; Stepping motor one is connected with sleeve one, sleeve one is connected with bevel gear two through positioning key and gear shaft, bevel gear two is meshed with bevel gear one, bevel gear one is connected with said screw one, and said screw one passes through Screw hole one on the support cover; the screw one, the screw two and the gear shaft respectively have the positioning groove one, the positioning groove two and the positioning groove three, and the screw positioning plate one 25 There are two gaps on it, which just fit with the positioning groove one 6 and the positioning groove three 24, limiting Determine the displacement of the screw rod one 3 and the gear shaft 23 along its own axis, the screw rod positioning plate two 20 cooperates with the positioning groove two 19 to limit the displacement of the screw rod two 18 along its own axis, and the two ends of the screw rod two have The positioning key is connected with the sleeve two and the sleeve three to transmit torque, the screw positioning plate one is welded to the two ends of the support leg, and the screw positioning plate two is fixed in the slot hole of the plate; the screw one and the support cover Cooperate with the first screw hole, so that the first screw rotates and the relative displacement of the support cover, and the second screw cooperates with the second screw hole of the support leg, so that the second rotation of the screw and the relative displacement of the support leg; The stepping motors 1 and 2 rotate corresponding angular displacement after receiving the displacement pulse, and the torque of the stepping motor 1 is transmitted to the screw 1 through the sleeve 1, the bevel gear 2 and the bevel gear 1 to make the screw 1 rotate, and the screw 1 The rotation drives the support cover to move up and down, thereby adjusting the up and down height and inclination of the crankshaft of the engine; the stepper motor 2 transmits the angular displacement to the screw rod 2 through the sleeve 2 or sleeve 3 and the positioning key, and the rotation of the screw rod 2 prompts the support The seat legs generate relative displacement along the axis of the screw rod, thereby adjusting the horizontal displacement of the crankshaft of the engine.

The bolt positioning holes of the engine support one and the engine support two are on the same straight line; this line is in a plane parallel to the end face of the dynamometer; after each displacement is adjusted, the displacement sensor one and the displacement sensor two measure the engine again. The relative displacement of the flywheel is output to the ECU for analysis and processing. If the requirements are met, the ECU does not send a signal to the stepper motor 1 and stepper motor 2, but sends a signal to the buzzer, and the buzzer When the prompt sounds, the staff can tighten and lock the bolt fixing part and the screw fixing part, and the centering work is completed; if the relative displacement of the flywheel does not meet the requirements, then the above centering process is repeated again.

The present invention has the advantages compared with the existing gantry: the centering process does not need to manually adjust the engine support, which is convenient and quick, saves labor costs, protects the engine support, prolongs the service life of the gantry, and improves the utilization rate of the gantry.

Description of drawings

Fig. 1 is a schematic structural diagram of an engine support (without a stepping motor) of an automatic adjustment centering device of an engine stand according to the present invention.

Fig. 2 is a schematic diagram of the working process of an automatic adjustment and centering device for an engine stand according to the present invention.

Fig. 3 is a schematic diagram showing the cooperation of bevel gear 1 and bevel gear 2 of an automatic adjustment and centering device for an engine pedestal according to the present invention.

Fig. 4 is a schematic structural view of the screw rod 1 of the automatic adjustment and centering device of an engine stand according to the present invention.

Fig. 5 shows a schematic structural view of screw 2 of an automatic adjustment and centering device for an engine stand according to the present invention.

Fig. 6 is a schematic structural diagram of a gear shaft of an automatic adjustment centering device for an engine stand according to the present invention.

Fig. 7 shows the front view of the screw positioning plate 1 of the automatic adjustment and centering device of the engine stand according to the present invention.

Fig. 8 shows a top view of screw positioning plate 1 of an automatic adjustment and centering device of an engine stand according to the present invention.

Fig. 9 shows the front view of the screw positioning plate 2 of the automatic adjustment and centering device of the engine stand according to the present invention.

Fig. 10 shows a schematic structural view of the bottom plate of the automatic adjustment centering device of the engine stand according to the present invention.

Fig. 11 is a schematic diagram showing the relative position of the engine support of the automatic adjustment centering device of the engine stand according to the present invention.

detailed description

Below in conjunction with example accompanying drawing, the present invention will be further described:

An automatic adjustment and centering device of an engine stand in the present invention comprises 1. an engine fixing hole; 2. a support cover; 3. a screw rod 1; 4. a bolt fixing member; ;7, bevel gear one; 8, bevel gear two; 9, support leg; 10, sleeve one; 11, screw hole two; 12, sleeve three; 13, positioning key; 14, chute hole three; 15 , base; 16, plate slot hole; 17, screw positioning hole; 18, screw two; 19, positioning groove two; 20, screw positioning plate two; 21, screw fixing part; 22, sleeve two; 23, gear shaft 24, positioning groove three; 25, screw positioning plate one; 26, chute hole two; 27, screw hole one; 28, stepping motor one; 29, stepping motor two; 30, displacement sensor one; 31, Displacement sensor two; 32, ECU; 33, buzzer; 34, engine support one; 35, engine support two; 36, engine support three.

The screw fixture 21 of described engine support 34,35,36 is fixed in the screw positioning hole 17; Then engine is placed on described engine support 34,35,36; View from engine flywheel end to free end, described The first engine support 34 is the left support of the engine, the second engine support 35 is the right support of the engine, and the third engine support 36 is the free end support of the engine.

The bolt fixing part 4 and the screw fixing part 21 are all in a loose state before the centering is adjusted, and the screw rod one 3 and the screw rod two 18 are rotatable under the action of the stepping motor one 28 and the stepping motor two 29 respectively .

The angular displacement that stepping motor one 28 and stepping motor two 29 turn over under each pulse signal is certain, and when described screw rod one 3 and screw rod two 18 turn one circle, with respect to described screw rod hole 27 and screw rod The displacement of the hole 11 is constant.

Displacement sensor 1 30 and displacement sensor 2 31 are fixed on the flange of the dynamometer and rotate together with the rotating shaft of the dynamometer. The displacement sensor 1 30 can measure the 12 o'clock and 6 o'clock of the end face of the engine flywheel. , 9 o'clock, 3 o'clock relative axis displacement of the four points, the displacement sensor 2 31 can measure 12 o'clock, 6 o'clock, 9 o'clock, 3 o'clock four points on the flywheel circumference relative radial displacement.

The first displacement sensor 30 and the second displacement sensor 31 input the relative displacement signal of the engine flywheel to the ECU32, and the ECU32 first analyzes and processes the horizontal radial displacement signal and converts the electric pulse signal to the engine support 34, 35, respectively. Stepping motor two 29 of 36, the stepping motor two 29 transmits the angular displacement to the screw two 18 through the sleeve two 22 (the stepping motor two is connected with the sleeve three 12 in the engine support two 35) corresponding angular displacement; the screw positioning plate 20 is inserted into the plate slot 16, cooperates with the positioning groove 19 to limit the displacement of the screw 2 18 along its own axis, and the screw 2 18 and the screw Hole two 11 cooperates, screw thread is arranged in screw hole (11,27), and the rotation of described screw rod two 18 is converted into the horizontal radial displacement of bearing leg 9, thereby adjusts the horizontal displacement of the parallel end face of engine flywheel.

Then the ECU outputs the vertical displacement of the end face to the stepper motor one 28 of the engine support 34, 35, 36 respectively in the form of an electric pulse signal, and the stepper motor one 28 passes the angular displacement through the sleeve One 10, location key 13, gear shaft 23, bevel gear two 8, bevel gear one 7 are transformed into the angular displacement of screw rod one 3, and the two ends of described screw rod fixing plate one 25 are horizontally welded on the support leg 9, and described screw rod One side of fixed plate one 25 links to each other with positioning groove one 6 and limits the vertical displacement of screw rod one 3; The angular displacement of the above-mentioned screw rod 3 is converted into the vertical displacement of the bearing cover, thereby adjusting the vertical displacement of the end face of the engine flywheel.

Finally, the ECU32 converts the displacement signals at 12 o'clock and 6 o'clock on the end face into electric pulse signals and transmits them to the stepping motor-28, and the rotation of the stepping motor drives the rotation of the screw-3, and the screw -3 rotation makes the support cover 2 move up and down, thereby adjusting the end face of the engine flywheel to be parallel to the end face of the dynamometer.

After the adjustment is completed, the displacement sensor 1 30 and the displacement sensor 2 31 measure the relative displacement of the engine flywheel again and input it to the ECU 32. After the analysis by the ECU 32, if the alignment accuracy requirements are met, the ECU 32 sends a signal to the buzzer 33 , generate a prompt sound for centering adjustment, and then tighten and lock the bolt fixing part 4 and the screw fixing part 21; if the centering accuracy requirements are not met, repeat the above centering process again.

The present invention mainly provides an automatic adjustment centering device for an engine stand, so as to reduce human participation in the centering process, enhance the practical performance of the centering device, save labor costs and time, have high precision, and improve the utilization rate of the stand. Extend the life of the bench. Without departing from the essence of the present invention, the structural arrangement and size of the automatic adjustment and centering device of the engine stand can be modified accordingly, but these corresponding modifications should fall within the protection scope of the claims of the present invention.

Claims (5)

1. An automatic adjustment and centering device of an engine stand, comprising a displacement sensor one for measuring the displacement of the end face of the flywheel of the engine, a displacement sensor two for measuring the circumferential displacement of the flywheel, and a displacement sensor one (30) and a displacement sensor two (31) to be connected The ECU connected to the ECU, the buzzer connected to the ECU, the engine support one, the engine support two and the engine support three, and each engine support structure is the same, including a base (15), a support cover (2), a support leg (9 ), the first chute hole (5) on the support cover (2), the second chute hole (26) on the support leg, the bolts connecting the first chute hole (5) and the second chute hole (26) Part (4), the engine fixing hole (1) located on the support cover, the screw hole one (27), the screw rod one (3) that one end matches with the screw rod hole one (27), and the other end of the screw rod one (3) Connected bevel gear one (7), bevel gear two (8) meshing vertically with bevel gear one (7), gear shaft (23) connected with bevel gear two, and positioning key (13) on the gear shaft (23) ) matched sleeve one (10), stepper motor one (28) connected to the sleeve one (10), screw positioning plate one (25) welded on both sides of the support leg (9), and the described Positioning groove one (6) on the screw rod one (3) that screw rod positioning plate one (25) one side matches, on the gear shaft (23) that matches with described screw rod positioning plate one (25) other side The positioning groove three (24), the screw positioning plate one (25) play the role of restricting the axial displacement of the screw rod one (3) and the gear shaft (23) along their respective axial directions, and the screw rod on the support leg (9) Hole two (11), screw two (18) matched with screw hole two (11), sleeve two (22) and sleeve three (12) connected to the positioning keys (13) at both ends of screw two (18) , the stepper motor two connected to the sleeve two (22) or the sleeve three (12), the positioning groove two (19) located in the middle part on the screw two (18), and the positioning groove two (19) ) connected screw positioning plate two (20), limit the plate groove hole (16) on the base (15) of the screw positioning plate two (20), the chute hole three (14) on both sides of the support leg (9), The screw positioning hole (17) on the base (15), and the screw fixing part (21) matched with the screw positioning hole (17); it is characterized in that: the support cover is connected with the engine through the engine fixing hole; the displacement sensor Displacement sensor 1 and displacement sensor 2 are installed on the flange of the dynamometer respectively, and rotate together with the shaft of the dynamometer; The axial relative displacement of the four points in the direction, the displacement sensor 2 measures the relative height and relative radial displacement of the four points in the direction of 12 o'clock, 6 o'clock, 9 o'clock, and 3 o'clock on the circumference of the engine flywheel disc; Displacement sensor one (30) and displacement sensor two (31) are connected with ECU, and the relative displacement measured is transmitted to ECU, and ECU is connected with the stepping motor one (28) of engine support one (34) and engine support two (35) Stepper Motor Two (29) Connected, the ECU analyzes and processes the data and generates the pulse wavelength corresponding to the displacement and transmits it to the stepper motor 1 and the stepper motor 2; the stepper motor 1 (28) and the stepper motor 2 (29) rotate the corresponding angular displacement after receiving the displacement pulse The second screw passes through the second screw hole on the support leg, and the screw hole has threads that match the screw, and the second screw positioning plate cooperates with the second positioning groove on the second screw, The screw positioning plate 2 is inserted into the slot hole of the plate, the screw positioning plate 2 positions the screw 2 and can only rotate, and the axis has no displacement; the rotation of the stepping motor 2 drives the rotation of the screw 2, and the screw 2 rotates. The rotation causes the support legs to produce relative displacement along the axial direction of the screw rod two; the stepping motor one is connected with the sleeve one, the sleeve one is connected with the bevel gear two through the positioning key and the gear shaft, and the bevel gear two is connected with the bevel gear one meshing, the second bevel gear is connected with the first screw, and the first screw passes through the screw hole one on the support cover; the torque of the stepping motor one is transmitted to the first screw through the sleeve one, the second bevel gear and the second bevel gear. Said screw makes screw 1 rotate at the same time, said screw positioning plate 1 limits the up and down displacement of said screw 1, and said screw 1 rotates to drive said bearing cover to move up and down; Cylinder 3 is connected; stepping motor 2 in engine support 1 is connected to sleeve 2; stepping motor 2 in engine support 3 is connected to sleeve 2; ECU is also connected to the buzzer, and the buzzer will give a prompt when the alignment is completed sound. 2. The centering device according to claim 1, characterized in that, the first displacement sensor (30) and the second displacement sensor (31) are connected to the ECU (32), and the ECU (32) is connected to the The stepper motor one (28) of engine support one (34) links to each other with the stepper motor two (29) of engine support two (35), and stepper motor one (28) drives described screw rod one (3) to rotate, stepping Motor two (29) drives described screw rod two (18) to rotate, and described screw rod one (3) rotates can make described support cover (2) produce relative displacement, and described screw rod two (18) rotates can make described support Seat leg (9) produces relative displacement. 3. The centering device according to claim 1, characterized in that bevel gear two (8) and bevel gear one (7) are meshed and the axis is at an angle of 90°, and the screw positioning plate one (25), positioning Groove one (6) and positioning groove three (24) cooperate to locate. 4. The centering device according to claim 1, characterized in that the first screw (3), the second screw (18) and the gear shaft (23) respectively have the first positioning groove (6), Positioning groove two (19) and positioning groove three (24), two gaps are arranged on the described screw positioning plate one (25), just in time with described positioning groove one (6), described positioning groove three ( 24) Cooperate to limit the displacement of the screw rod one (3) and the gear shaft (23) along its own axis, and the screw rod positioning plate two (20) cooperates with the positioning groove two (19) to limit the screw rod two (18) ) along the displacement of its own axis, the two ends of the screw rod two (18) have the positioning key (13) connected with the sleeve three (12) and the sleeve two (22) to transmit torque, the screw positioning plate one (25) Welded on the two ends of the support leg (9), the screw positioning plate two (20) is fixed in the plate slot (16). 5. The centering device according to claim 1, characterized in that the first screw (3) and the support cover (2) cooperate with the first screw hole (27), so that the first screw (3) rotates and the The support cover (2) produces relative displacement, and the screw rod two (18) cooperates with the support leg (9) with the screw hole two (11), so that the screw rod two (18) rotates and the support leg ( 9) Generate relative displacement.