Testing device for hydraulic pump

Abstract

The utility model provides a testing device for a hydraulic pump, which comprises a testing table, a sliding table is arranged on the surface of the testing table through a guide rod in a sliding manner, a supporting plate is arranged on the surface of the testing table through a sliding rail in a sliding manner, an air cylinder is mounted on the surface of the testing table, and the output end of the air cylinder is connected to the side face of the supporting plate. And a positioning mechanism is arranged on the surface of the test board. The sliding table is pushed to drive the motor to move in the direction close to the hydraulic pump, the rack can be driven by the sliding table to move synchronously, then the positioning mechanism can act, the short shaft of the hydraulic pump is fixed through the positioning plate, and when the motor drives the coupler to continue to be close to the short shaft of the hydraulic pump, the short shaft is fixed. The positioning plate can release the positioning of the short shaft of the hydraulic pump, so that the short shaft of the hydraulic pump can be completely connected with the coupler, the connection strength of the hydraulic pump and the motor is prevented from being influenced, and the normal test of the hydraulic pump is prevented from being influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic pump testing, and particularly relates to a testing device for a hydraulic pump. Background Technique

[0002] A hydraulic pump is a power element of a hydraulic system. It is driven by an engine or a motor, sucks oil from a hydraulic oil tank, forms pressurized oil and discharges it, and sends it to an actuator. To ensure that the performance of the produced hydraulic pump meets the quality requirements, it is necessary to conduct an operation test on the hydraulic pump;

[0003] Publication number "CN117989123A" provides a hydraulic pump testing device, including a test bench. A fuel tank is arranged below the test bench, a positioning mechanism is arranged above the test bench, a supporting mechanism is arranged on one side of the positioning mechanism close to the fuel tank, an adjusting mechanism is arranged on one side of the positioning mechanism far from the fuel tank, and a motor is fixedly installed above the adjusting mechanism. This device positions the input end of the hydraulic pump through the positioning mechanism, so that the axis of the input end of the hydraulic pump and the axis of the coupling are in the same vertical plane. Then, the up and down positions of the motor and the coupling are adjusted through the adjusting mechanism, so that the axis of the input end of the hydraulic pump and the axis of the coupling are on the same straight line, and hydraulic pumps of different specifications and models can be tested;

[0004] However, the above solution still has the following defects:

[0005] Two positioning plates approach each other to position the output end of the hydraulic pump. However, for some hydraulic pumps with short shafts, when the short shaft of the hydraulic pump needs to be connected to the coupling, the positioning plate will hinder the connection between the coupling and the short shaft during the positioning of the short shaft of the hydraulic pump, thus affecting the connection strength between the hydraulic pump and the motor, and further affecting the normal test of the hydraulic pump. Content of the Utility Model

[0006] The purpose of the utility model is to provide a testing device for a hydraulic pump to solve the problems put forward in the above background technique.

[0007] To achieve the above purpose, the utility model provides the following technical solution:

[0008] A testing device for a hydraulic pump, including a test bench. A sliding table is slidably arranged on the surface of the test bench through a guide rod, a supporting plate is slidably arranged on the surface of the test bench through a slide rail, a cylinder is installed on the surface of the test bench, and the output end of the cylinder is connected to the side surface of the supporting plate. A positioning mechanism is arranged on the surface of the test bench;

[0009] The positioning mechanism includes a rack, a gear, a traction shaft, a drive shaft, a base, a positioning plate and a torsion spring. The drive shaft is rotatably arranged on the surface of the base, and one end of the drive shaft penetrates through the base and extends to the side of the base. The base is fixed on the surface of the test bench. The positioning plate is slidably arranged on the surface of the drive shaft through a guiding structure and a limiting structure. The traction shaft is installed at one end of the drive shaft through a clutch structure. The gear is fixed on the surface of the traction shaft. The rack is fixed on the side of the sliding table, and the rack meshes with the gear. The torsion spring is fixed between the gear and the base.

[0010] Preferably, the guiding structure includes a guiding groove, a through hole and a guiding protrusion. The through hole is arranged on the surface of the positioning plate. The guiding protrusion is arranged at the top of the inner cavity of the through hole. The guiding groove is arranged on the surface of the drive shaft. The positioning plate is slidably arranged on the surface of the drive shaft through the through hole, and the guiding protrusion is slidably arranged in the guiding groove.

[0011] Preferably, the limiting structure includes a groove, a limiting protrusion and a limiting groove. The groove is arranged at the bottom of the positioning plate. The positioning plate is slidably arranged on the surface of the base through the groove. The limiting protrusion is arranged on the inner wall of the groove. The limiting groove is arranged on the side wall of the base. The limiting protrusion is slidably arranged in the limiting groove.

[0012] Preferably, the guiding groove is spirally arranged on the surface of the drive shaft, and the projection of the guiding groove on the end face of the drive shaft is exactly a perfect circle.

[0013] Preferably, the clutch structure includes a counterbore, a spring, a spherical protrusion and a spherical groove. The spherical groove is arranged on the inner wall of the traction shaft. The counterbore is arranged on the surface of the drive shaft. The spherical protrusion is slidably arranged in the counterbore, and one end of the spherical protrusion is clamped in the spherical groove. The spring is fixed between the counterbore and the spherical protrusion.

[0014] Preferably, a T-shaped track is fixedly arranged on the surface of the test bench, and the bottom of the rack is slidably arranged on the surface of the T-shaped track.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] In this utility model, when the sliding table is pushed to drive the motor to move towards the hydraulic pump, the rack can be driven by the sliding table to move synchronously, so that the positioning mechanism can act, and the short shaft of the hydraulic pump is fixed by the positioning plate. When the motor drives the coupling to continue approaching the short shaft of the hydraulic pump, the positioning plate can release the positioning of the short shaft of the hydraulic pump, so that the short shaft of the hydraulic pump can be completely connected to the coupling, preventing the connection strength between the hydraulic pump and the motor from being affected, and further preventing the normal test of the hydraulic pump from being affected. Description of the Drawings

[0017] Figure 1 is a schematic diagram of the main structure of the present utility model;

[0018] Figure 2 is a schematic diagram of the main structure of the positioning mechanism of the present utility model;

[0019] Figure 3 is a schematic diagram of the main structure of the clutch structure of the present utility model;

[0020] Figure 4 is a schematic diagram of the connection structure between the positioning plate and the base of the present utility model;

[0021] Figure 5 is a schematic diagram of the internal structure of the through hole of the present utility model.

[0022] In the figure: 1, test bench; 2, guide rod; 3, sliding table; 4, slide rail; 5, supporting plate; 6, cylinder; 7, rack; 8, gear; 9, traction shaft; 10, drive shaft; 11, base; 12, positioning plate; 13, torsion spring; 14, guide groove; 15, through hole; 16, guide protrusion; 17, groove; 18, limit protrusion; 19, limit groove; 20, counterbore; 21, spring; 22, spherical protrusion; 23, spherical groove; 24, T-shaped track. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present utility model.

[0024] Please refer to Figures 1-5 , the present utility model provides a test device for a hydraulic pump, including a test bench 1. A sliding table 3 is slidably arranged on the surface of the test bench 1 through a guide rod 2. A supporting plate 5 is slidably arranged on the surface of the test bench 1 through a slide rail 4. A cylinder 6 is installed on the surface of the test bench 1. The output end of the cylinder 6 is connected to the side surface of the supporting plate 5. A positioning mechanism is arranged on the surface of the test bench 1.

[0025] Please refer to Figure 1 , a positioning mechanism identical to that in the comparative document is arranged above the sliding table 3. When the sliding table 3 is pushed, the height of the motor is adjusted through the positioning mechanism, and then the cylinder 6 is started. The cylinder 6 drives the supporting plate 5 to translate on the surface of the slide rail 4, so that the supporting plate 5 drives the hydraulic pump to approach the positioning mechanism, so as to perform positioning adjustment on the short shaft of the hydraulic pump through the positioning mechanism.

[0026] The positioning mechanism includes a rack 7, a gear 8, a traction shaft 9, a drive shaft 10, a base 11, a positioning plate 12 and a torsion spring 13. The drive shaft 10 is rotatably arranged on the surface of the base 11, and one end of the drive shaft 10 penetrates through the base 11 and extends to the side of the base 11. The base 11 is fixed on the surface of the test bench 1. The positioning plate 12 is slidably arranged on the surface of the drive shaft 10 through a guiding structure and a limiting structure. The traction shaft 9 is installed at one end of the drive shaft 10 through a clutch structure. The gear 8 is fixed on the surface of the traction shaft 9. The rack 7 is fixed on the side of the sliding table 3. A T-shaped track 24 is fixedly arranged on the surface of the test bench 1. The bottom of the rack 7 is slidably arranged on the surface of the T-shaped track 24, and the rack 7 meshes with the gear 8. The torsion spring 13 is fixed between the gear 8 and the base 11.

[0027] Please refer to Figure 1 and 2 , when the sliding table 3 moves, it can drive the rack 7 to move synchronously. At this time, the rack 7 can drive the traction shaft 9 to rotate synchronously. At this time, the traction shaft 9 can drive the drive shaft 10 to rotate through the clutch structure, so that the drive shaft 10 can drive the positioning plate 12 to move towards the direction close to the short shaft of the hydraulic pump through the guiding structure and the limiting structure until the positioning plate 12 abuts against the surface of the short shaft of the hydraulic pump. During the above process, when the gear 8 rotates, it will drive the torsion spring 13 to deform and store energy. When the rack 7 continues to move and disengages from the surface of the gear 8, the torsion spring 13 can drive the drive shaft 10 to reset through the gear 8, the traction shaft 9 and the clutch structure, so as to drive the positioning plate 12 to reset. At this time, the positioning plate 12 has completed the positioning of the short shaft of the hydraulic pump, so the coupling can be normally connected to the short shaft of the hydraulic pump.

[0028] The guiding structure includes a guiding groove 14, a through hole 15 and a guiding protrusion 16. The through hole 15 is arranged on the surface of the positioning plate 12. The guiding protrusion 16 is arranged at the top of the inner cavity of the through hole 15. The guiding groove 14 is arranged on the surface of the drive shaft 10. The positioning plate 12 is slidably arranged on the surface of the drive shaft 10 through the through hole 15. The guiding protrusion 16 is slidably arranged in the guiding groove 14. The guiding groove 14 is spirally arranged on the surface of the drive shaft 10. The projection of the guiding groove 14 on the end face of the drive shaft 10 is exactly a perfect circle.

[0029] Please refer to Figure 2 and 5 , when the drive shaft 10 rotates, it can drive the guiding groove 14 to rotate synchronously. When the guiding groove 14 rotates, it can pull the positioning plate 12 to translate on the surface of the base 11 through the guiding protrusion 16, thus realizing the driving of the positioning plate 12.

[0030] The limiting structure includes a groove 17, a limiting protrusion 18 and a limiting groove 19. The groove 17 is provided at the bottom of the positioning plate 12. The positioning plate 12 is slidably arranged on the surface of the base 11 through the groove 17. The limiting protrusion 18 is provided on the inner wall of the groove 17. The limiting groove 19 is provided on the side wall of the base 11. The limiting protrusion 18 is slidably arranged in the limiting groove 19.

[0031] Please refer to Figure 4 , when the positioning plate 12 moves, it can move synchronously on the surface of the base 11 through the groove 17. At this time, the positioning plate 12 can drive the limiting protrusion 18 to move synchronously inside the limiting groove 19. Through the cooperation of the limiting groove 19 and the limiting protrusion 18, the movement process of the positioning plate 12 can be limited to prevent deviation.

[0032] The clutch structure includes a counterbore 20, a spring 21, a spherical protrusion 22 and a spherical groove 23. The spherical groove 23 is provided on the inner wall of the traction shaft 9. The counterbore 20 is provided on the surface of the driving shaft 10. The spherical protrusion 22 is slidably arranged in the counterbore 20, and one end of the spherical protrusion 22 is engaged in the spherical groove 23. The spring 21 is fixed between the counterbore 20 and the spherical protrusion 22.

[0033] Please refer to Figure 3 , when the gear 8 drives the traction shaft 9 to rotate, the traction shaft 9 can drive the spherical protrusion 22 and the spring 21 in the counterbore 20 to rotate synchronously through the spherical groove 23, so that the counterbore 20 drives the driving shaft 10 to rotate synchronously. At this time, the torsion spring 13 is in an energy storage state, and the gear 8 does not disengage from the surface of the gear 8. The positioning plate 12 gradually moves towards the direction close to the short shaft of the hydraulic pump. When the positioning plate 12 just touches the surface of the short shaft of the hydraulic pump, the positioning plate 12 cannot continue to rotate, but the rack 7 is still moving. Therefore, the rack 7 can drive the gear 8 and the traction shaft 9 to continue to rotate. When the traction shaft 9 rotates, it can drive the spherical groove 23 to rotate synchronously, so that the spherical groove 23 squeezes the spherical protrusion 22 to store energy in the spring 21. At this time, the traction shaft 9 is still in a rotating state. As the slide 3 moves, when the coupling is about to contact the short shaft of the hydraulic pump, the rack 7 disengages from the bottom of the gear 8. At this time, the torsion spring 13 releases energy to drive the traction shaft 9 to rotate through the gear 8, and the spring 21 releases energy to drive the spherical protrusion 22 to re-engage in the spherical groove 23, so as to drive the driving shaft 10 to reverse through the traction shaft 9, thereby driving the positioning plate 12 away from the short shaft of the hydraulic pump. At this time, the coupling can be normally connected to the short shaft of the hydraulic pump, and the positioning plate 12 will not hinder the connection between the coupling and the short shaft of the hydraulic pump.

[0034] It should be noted that in the initial situation, the position of the guiding protrusion 16 needs to be set in the middle section of the guiding groove 14. In this way, when the positioning plate 12 is reset, it can stay in the middle section of the driving shaft 10. When the sliding table 3 is reset, the sliding table 3 can drive the rack 7 to reverse. At this time, the rack 7 will drive the gear 8 and the traction shaft 9 to reverse. Driven by the clutch structure, the traction shaft 9 will drive the positioning plate 12 to move towards the end of the driving shaft 10 away from the hydraulic pump, and the torsion spring 13 is in an energy storage state until the rack 7 is reset and disengages from the surface of the gear 8. At this time, the torsion spring 13 can drive the positioning plate 12 to reset to the middle section of the driving shaft 10 again for the next use.

[0035] Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A test device for a hydraulic pump, comprising a test bench (1), characterized in that: The surface of the test bench (1) is provided with a slide table (3) for sliding movement via a guide rod (2), the surface of the test bench (1) is provided with a support plate (5) for sliding movement via a slide rail (4), a cylinder (6) is installed on the surface of the test bench (1), the output end of the cylinder (6) is connected to the side of the support plate (5), and a positioning mechanism is provided on the surface of the test bench (1); The positioning mechanism comprises a rack (7), a gear (8), a traction shaft (9), a driving shaft (10), a base (11), a positioning plate (12) and a torsion spring (13); the driving shaft (10) is rotatably arranged on the surface of the base (11), and one end of the driving shaft (10) passes through the base (11) and extends to the side of the base (11); the base (11) is fixed to the surface of the test bench (1); the positioning plate (12) is slidably arranged on the surface of the driving shaft (10) through a guide structure and a limiting structure; the traction shaft (9) is installed on one end of the driving shaft (10) through a clutch structure; the gear (8) is fixed to the surface of the traction shaft (9); the rack (7) is fixed to the side of the slide table (3), and the rack (7) and the gear (8) are meshed with each other; and the torsion spring (13) is fixed between the gear (8) and the base (11).

2. A testing device for a hydraulic pump according to claim 1, characterized in that: The guide structure comprises a guide groove (14), a through hole (15) and a guide protrusion (16); the through hole (15) is arranged on the surface of the positioning plate (12); the guide protrusion (16) is arranged at the top of the inner cavity of the through hole (15); the guide groove (14) is arranged on the surface of the driving shaft (10); the positioning plate (12) is slidably arranged on the surface of the driving shaft (10) through the through hole (15); and the guide protrusion (16) is slidably arranged in the guide groove (14).

3. A testing device for a hydraulic pump according to claim 2, characterized in that: The limiting structure comprises a groove (17), a limiting protrusion (18) and a limiting groove (19); the groove (17) is arranged at the bottom of the positioning plate (12); the positioning plate (12) is slidably arranged on the surface of the base (11) through the groove (17); the limiting protrusion (18) is arranged on the inner wall of the groove (17); the limiting groove (19) is arranged on the side wall of the base (11); and the limiting protrusion (18) is slidably arranged in the limiting groove (19).

4. A testing device for a hydraulic pump according to claim 2, characterized in that: The guide groove (14) is arranged in a spiral shape on the surface of the drive shaft (10), and the projection of the guide groove (14) on the end surface of the drive shaft (10) is exactly a perfect circle.

5. A testing device for a hydraulic pump according to claim 1, characterized in that: The clutch structure comprises a countersunk hole (20), a spring (21), a spherical protrusion (22) and a spherical groove (23); the spherical groove (23) is arranged on the inner wall of the traction shaft (9); the countersunk hole (20) is arranged on the surface of the driving shaft (10); the spherical protrusion (22) is slidably arranged in the countersunk hole (20), and one end of the spherical protrusion (22) is engaged in the spherical groove (23); and the spring (21) is fixed between the countersunk hole (20) and the spherical protrusion (22).

6. A testing device for a hydraulic pump according to claim 1, characterized in that: A T-shaped track (24) is fixedly arranged on the surface of the test bench (1), and the bottom of the rack (7) is slidably arranged on the surface of the T-shaped track (24).

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