Automobile shifting fork friction performance detection table

Abstract

The utility model discloses an automobile shift fork friction performance detection bench, and specifically relates to the shift fork friction performance detection technology field, the automobile shift fork friction performance detection bench comprises a box body, the top of the box body is fixedly connected with a support frame, the top of the box body is fixedly connected with a fixed rod, the middle part of the fixed rod is fixedly connected with a support ring, and the top of the fixed rod is sleeved with a first nut and a shift fork; a rotating rod is inserted into the top of the box body, and the bottom of the rotating rod is fixedly connected with a first gear. According to the utility model, the fixed rod is matched with the first nut and the support ring, so that the shifting fork can be conveniently installed and fixed, the fixed disc is pushed by the starting cylinder, the friction block can be attached to the fork end of the shifting fork, and the rotating rod is sequentially controlled by the starting motor to drive the friction block to rotate, so that the friction performance of the shifting fork can be tested; the device is convenient to test and use, can test one side of the shifting fork or simultaneously test the friction performance of two sides of the shifting fork according to needs, is convenient to test and use, and improves the use effect.

Description

Technical Field

[0001] This utility model relates to the field of shift fork friction performance testing technology, and more specifically, to an automotive shift fork friction performance testing platform. Background Technology

[0002] The shift fork is a component on a car transmission. It is connected to the gear lever and located at the lower end of the lever. It moves the middle gear wheel to change the input / output speed ratio. The shift fork is mainly used for clutch shifting. In actual use, due to the engagement of the gears on the end faces of the lower fork, long-term use will cause wear on the end faces of the lower fork. Therefore, the wear performance of the shift fork needs to be tested during the actual production process.

[0003] Traditional methods for testing the friction performance of automotive shift forks involve testing the assembled gearbox on a gearbox test bench. This test indirectly assesses the friction life of the shift forks while also testing the overall performance of the gearbox. However, this method forces companies that manufacture shift forks to equip themselves with a complete gearbox test bench, which is costly, wastes resources, and is inconvenient for testing the friction performance of shift forks. Therefore, a new automotive shift fork friction performance testing bench is proposed. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides an automotive shift fork friction performance testing platform to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automotive shift fork friction performance testing platform, comprising a housing, a support frame fixedly connected to the top of the housing, a fixed rod fixedly connected to the top of the housing, a support ring fixedly connected to the middle of the fixed rod, a first nut and a shift fork sleeved on the top of the fixed rod, the second support ring of the fixed rod facilitating the installation and limiting of the shift fork, and the compression of the shift fork by the first nut improving the stability of the shift fork, a rotating rod inserted into the top of the housing, and a first gear fixedly connected to the bottom of the rotating rod;

[0006] A motor is fixedly connected to the middle of the housing. The output end of the motor is connected to a second gear. A connecting ring is provided in the middle of the first gear. An electric push rod is connected to the bottom of the connecting ring. Starting the motor controls the second gear to drive the first gear to rotate, which can control the rotation rod to rotate. Starting the electric push rod controls the connecting ring to drive the first gear downward, which can control the rotation rod to move downward, making it convenient to separate the top of the rotation rod.

[0007] A limiting groove is formed in the middle of the rotating rod, and a stabilizing rod is fixedly connected to the middle of the limiting groove. Springs and limiting sliders are symmetrically sleeved at both ends of the stabilizing rod. A fixed plate is fixedly connected to the outside of the limiting slider. Friction blocks are provided on opposite sides of the two fixed plates. A threaded rod is fixedly connected to one side of the friction blocks. A pressing plate is provided on opposite sides of the two fixed plates. A cylinder is provided on one side of the pressing plate. By controlling the pressing plate to push the fixed plate with the cylinder, the fixed plate can drive the friction block to move towards one side of the shift fork until the friction block is in contact with the shift fork. The friction performance on the shift fork can be controlled by the rotation of the friction block, which is convenient for testing. By controlling the thrust of the cylinder on the fixed plate, the pressure of the friction block on the shift fork can be adjusted, which is convenient for testing the friction performance under different pressures.

[0008] Preferably, the top end of the fixing rod is threadedly connected to the first nut, the shift fork is disposed at the bottom of the first nut, and one end of the shift fork extends between the two fixing discs. The shift fork is pressed by the first nut, which facilitates the installation and fixing of the shift fork.

[0009] Preferably, a controller is provided on the top of the housing, and an air pump is provided in the middle of the housing. The output end of the air pump is connected to the cylinder through a pressure valve and a pipe. The controller facilitates start-up, and the air pump can inject gas into the cylinder to facilitate start-up.

[0010] Preferably, the two cylinders are respectively located at the top of the support frame and the middle of the housing. The cross-section of the extrusion plate is set with an arc-shaped structure. A ball bearing is provided on one side of the extrusion plate. By pushing the fixed plate with the extrusion plate, the movement of the friction block can be easily controlled, and the ball bearing is provided to avoid friction between the fixed plate and the extrusion plate.

[0011] Preferably, the limiting slider is disposed on the opposite side of the two springs, the limiting slider is slidably connected to the limiting groove, and the stabilizing rod passes through the middle of the limiting slider. By pushing the limiting slider with the spring, the limiting slider can generate a force away from the shift fork when not in use, which facilitates the disassembly and installation of the shift fork.

[0012] Preferably, the surface of the fixed disk is provided with threaded holes, and the threaded rod corresponds one-to-one with the threaded hole. The threaded rod passes through the threaded hole and is fitted with a second nut. The multiple friction blocks form a ring structure. Through the cooperation of the threaded rod and the second nut with the threaded hole, it is convenient to install and disassemble the friction blocks and to replace the friction blocks.

[0013] Preferably, the first gear meshes with the second gear, and ball bearings are symmetrically arranged on both sides of the connecting ring. The electric push rod and the motor are both fixed in the middle of the housing. Activating the electric push rod controls the first gear to drive the rotating rod to move up and down. Activating the motor controls the second gear to drive the first gear to rotate the rotating rod. This, in turn, controls the fixed plate to rotate the friction block through the limit slider, facilitating the testing of the friction performance of the shift fork.

[0014] The technical effects and advantages of this utility model are as follows:

[0015] 1. This utility model firstly facilitates the installation and fixation of the shift fork by setting a fixing rod and cooperating with the first nut and support ring. By starting the cylinder to push the fixing plate, the friction block can be made to fit with the fork end of the shift fork. By starting the motor to control the rotating rod to drive the friction block to rotate, the friction performance of the shift fork can be tested. This is convenient for testing and can be used to test the friction performance of one side of the shift fork or both sides of the shift fork at the same time, which is convenient for testing and improves the use effect.

[0016] 2. This utility model also avoids friction between the extrusion plate and the fixed plate by setting ball bearings, and pushes the limit slider by spring to push the extrusion plate against the fixed plate, so that the friction block generates a force away from the fork, which facilitates separation and improves the use effect. The friction block is conveniently installed and fixed by the cooperation of the threaded rod, the second nut and the threaded hole, which facilitates the replacement of the friction block after it is severely damaged, thus improving the use effect.

[0017] In summary, through the interaction of the above-mentioned multiple functions, it is convenient to test the friction performance of the fork end of the shift fork, which facilitates testing and use, and also makes it easy to replace severely damaged friction blocks, thereby improving the performance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of this utility model.

[0020] Figure 3 This is a schematic diagram of the disassembled cross-sectional structure of the friction block, fixed disk, and rotating rod of this utility model.

[0021] Figure 4 This is a schematic diagram of the extrusion plate of this utility model.

[0022] The attached diagram is labeled as follows: 1. Housing; 2. Support frame; 3. Fixing rod; 4. Support ring; 5. First nut; 6. Shift fork; 7. Rotating rod; 8. First gear; 9. Second gear; 10. Motor; 11. Limiting groove; 12. Stabilizing rod; 13. Spring; 14. Limiting slider; 15. Fixing plate; 16. Threaded hole; 17. Friction block; 18. Threaded rod; 19. Second nut; 20. Connecting ring; 21. Electric push rod; 22. Controller; 23. Air pump; 24. Cylinder; 25. Extrusion plate; 26. Ball bearing. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] As attached Figure 1-4 The automotive shift fork friction performance testing platform shown includes a housing 1, a support frame 2 fixedly connected to the top of the housing 1, a fixed rod 3 fixedly connected to the top of the housing 1, a support ring 4 fixedly connected to the middle of the fixed rod 3, a first nut 5 and a shift fork 6 sleeved on the top of the fixed rod 3, the fixed rod 3 and the second support ring 4 facilitate the installation and limiting of the shift fork 6, and the first nut 5 squeezes the shift fork 6 to improve the stability of the shift fork 6, a rotating rod 7 inserted into the top of the housing 1, and a first gear 8 fixedly connected to the bottom of the rotating rod 7;

[0025] A motor 10 is fixedly connected to the middle of the housing 1. A second gear 9 is connected to the output end of the motor 10. A connecting ring 20 is provided in the middle of the first gear 8. An electric push rod 21 is connected to the bottom of the connecting ring 20. A limit groove 11 is opened in the middle of the rotating rod 7. A stabilizing rod 12 is fixedly connected to the middle of the limit groove 11. Springs 13 and limit sliders 14 are symmetrically sleeved at both ends of the stabilizing rod 12. A fixed plate 15 is fixedly connected to the outside of the limit slider 14. Friction blocks 17 are provided on opposite sides of the two fixed plates 15. A threaded rod 18 is fixedly connected to one side of the friction blocks 17. A pressing plate 25 is provided on opposite sides of the two fixed plates 15. A cylinder 24 is provided on one side of the pressing plate 25. Machine 10 controls the second gear 9 to drive the first gear 8 to rotate, which in turn controls the rotation of the rotating rod 7. Activating the electric push rod 21 controls the connecting ring 20 to drive the first gear 8 downwards, which in turn controls the downward movement of the rotating rod 7, facilitating the separation of the top of the rotating rod 7. The cylinder 24 controls the pressing plate 25 to push the fixed plate 15, causing the fixed plate 15 to move the friction block 17 towards one side of the shift fork 6 until the friction block 17 is in contact with the shift fork 6. The rotation of the friction block 17 can control the friction performance on the shift fork 6, facilitating testing. Furthermore, by controlling the pushing force of the cylinder 24 on the fixed plate 15, the pressure of the friction block 17 on the shift fork 6 can be adjusted, facilitating the testing of friction performance under different pressures.

[0026] As attached Figure 1-4As shown, the top of the fixing rod 3 is threadedly connected to the first nut 5, the shift fork 6 is located at the bottom of the first nut 5, and one end of the shift fork 6 extends between the two fixing discs 15. A controller 22 is located on the top of the housing 1, and an air pump 23 is located in the middle of the housing 1. The output end of the air pump 23 is connected to the cylinder 24 through a pressure valve and a pipe. The two cylinders 24 are respectively located on the top of the support frame 2 and in the middle of the housing 1. The cross-section of the extrusion plate 25 is set with an arc-shaped structure, and a ball bearing 26 is provided on one side of the extrusion plate 25. The limiting slider 14 is located on the opposite side of the two springs 13. The limiting slider 14 is slidably connected to the limiting groove 11. The stabilizing rod 12 passes through the middle of the limiting slider 14. The surface of the fixed plate 15 has a threaded hole 16. The threaded rod 18 corresponds to the threaded hole 16 one by one. The threaded rod 18 passes through the threaded hole 16 and is fitted with a second nut 19. Multiple friction blocks 17 form a ring structure. The first gear 8 and the second gear 9 mesh. Ball bearings are symmetrically arranged on both sides of the connecting ring 20. The electric push rod 21 and the motor 1 All components are fixed in the middle of the housing 1. The first nut 5 presses against the shift fork 6, facilitating its installation and fixation. The controller 22 facilitates start-up control. The air pump 23 injects gas into the cylinder 24, facilitating its start-up. The pressing plate 25 pushes the fixed plate 15, facilitating the movement of the friction block 17. The ball bearings 26 prevent friction between the fixed plate 15 and the pressing plate 25. The spring 13 pushes the limiting slider 14, causing it to move away from the shift fork 6 when not in use, facilitating the disassembly and installation of the shift fork 6. The threaded rod 18 and the second nut 19, in conjunction with the threaded hole 16, facilitate the installation, disassembly, and replacement of the friction block 17. The electric push rod 21 controls the first gear 8 to move the rotating rod 7 up and down. The starting motor 10 controls the second gear 9 to rotate the first gear 8, causing the rotating rod 7 to rotate. This, in turn, controls the fixed plate 15 to rotate the friction block 17 via the limiting slider 14, facilitating the testing of the friction performance of the shift fork 6.

[0027] The working principle of this utility model is as follows: When in use, one end of the shift fork 6 is fitted onto the top of the fixing rod 3, and the first nut 5 is threaded onto the top of the fixing rod 3 to fix the shift fork 6, and the position of the fork body of the shift fork 6 is located on the side close to the rotating rod 7.

[0028] When it is necessary to test the friction performance of the top of the shift fork 6, the top cylinder 24 is started to control the pressing plate 25 to push the top fixed plate 15 until the top friction block 17 is in contact with the top of the shift fork 6. Then the motor 10 is started to control the friction block 17 to rotate in sequence. By observing the rotation time and the friction condition of the shift fork 6 surface after friction, the friction performance of the shift fork 6 can be understood.

[0029] When it is necessary to control the extrusion friction intensity, the air pressure intensity inside the input cylinder 24 can be controlled, which can sequentially control the extrusion intensity of the friction block 17 on the shift fork 6, making it convenient for testing.

[0030] When it is necessary to test the friction performance of the bottom of the shift fork 6, the bottom cylinder 24 is activated to control the bottom friction block 17 to fit against the bottom wall of the shift fork 6 in sequence. By controlling the friction block 17 to rotate and fix for a certain period of time, and the friction condition of the surface of the shift fork 6 after friction, the friction performance of the shift fork 6 can be understood; this is convenient for testing.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A test bench for testing the friction performance of automotive shift forks, comprising a housing (1), characterized in that: A support frame (2) is fixedly connected to the top of the box (1), a fixing rod (3) is fixedly connected to the top of the box (1), a support ring (4) is fixedly connected to the middle of the fixing rod (3), a first nut (5) and a fork (6) are sleeved on the top of the fixing rod (3), a rotating rod (7) is inserted into the top of the box (1), and a first gear (8) is fixedly connected to the bottom of the rotating rod (7). A motor (10) is fixedly connected to the middle of the housing (1), and a second gear (9) is connected to the output end of the motor (10). A connecting ring (20) is provided in the middle of the first gear (8), and an electric push rod (21) is connected to the bottom of the connecting ring (20). A limiting groove (11) is provided in the middle of the rotating rod (7). A stabilizing rod (12) is fixedly connected to the middle of the limiting groove (11). A spring (13) and a limiting slider (14) are symmetrically sleeved at both ends of the stabilizing rod (12). A fixed plate (15) is fixedly connected to the outside of the limiting slider (14). A friction block (17) is provided on the opposite side of the two fixed plates (15). A threaded rod (18) is fixedly connected to one side of the friction block (17). A pressing plate (25) is provided on the opposite side of the two fixed plates (15). A cylinder (24) is provided on one side of the pressing plate (25).

2. The automotive shift fork friction performance testing bench according to claim 1, characterized in that: The top of the fixing rod (3) is threaded to the first nut (5), the shift fork (6) is located at the bottom of the first nut (5), and one end of the shift fork (6) extends between the two fixing discs (15).

3. The automotive shift fork friction performance testing bench according to claim 1, characterized in that: A controller (22) is provided on the top of the housing (1), and an air pump (23) is provided in the middle of the housing (1). The output end of the air pump (23) is connected to the cylinder (24) through a pressure valve and a pipe.

4. The automotive shift fork friction performance testing bench according to claim 1, characterized in that: The two cylinders (24) are respectively located at the top of the support frame (2) and the middle of the box (1). The cross-section of the extrusion plate (25) is set as an arc structure, and a ball bearing (26) is provided on one side of the extrusion plate (25).

5. The automotive shift fork friction performance testing bench according to claim 1, characterized in that: The limiting slider (14) is located on the opposite side of the two springs (13), the limiting slider (14) is slidably connected to the limiting groove (11), and the stabilizing rod (12) passes through the middle of the limiting slider (14).

6. The automotive shift fork friction performance testing bench according to claim 1, characterized in that: The surface of the fixed disk (15) is provided with threaded holes (16), and the threaded rod (18) corresponds one-to-one with the threaded hole (16). The threaded rod (18) passes through the threaded hole (16) and is fitted with a second nut (19). The multiple friction blocks (17) form a ring structure.

7. The automotive shift fork friction performance testing bench according to claim 1, characterized in that: The first gear (8) meshes with the second gear (9), and the connecting ring (20) is symmetrically provided with balls on both sides. The electric push rod (21) and the motor (10) are both fixed in the middle of the housing (1).

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