Automobile shock absorber durability detection rack

Abstract

The invention relates to the technical field of detection racks, in particular to an automobile shock absorber durability detection rack which comprises a machine table, a detection table is fixedly connected to the machine table through a plurality of supporting columns, a through hole is formed in the top wall of the detection table, a rotating plate is rotationally connected to the inner wall of the through hole through a rotating shaft, and a rectangular hole is formed in the side wall of the rotating plate. The top wall of the detection table is fixedly connected with a supporting plate, the inner wall of the supporting plate is slidably connected with a detection column in a penetrating mode, the side wall of the detection column is fixedly sleeved with a reset spring, and the other end of the reset spring is fixedly connected with the side wall of the supporting plate. By arranging a plurality of connecting rods, a sliding block, a rotating plate and other structures, the detection column can drive the rear mounting frame abutting against the detection column to slide so as to extrude the automobile shock absorber, so that the extrusion test of the automobile shock absorber is completed, and then the process is continuously repeated; therefore, cyclic detection of continuous extrusion-relaxation-extrusion relaxation of the automobile shock absorber under conventional road conditions can be carried out.

Description

Technical Field

[0001] The present invention relates to the technical field of test benches, and particularly relates to a durability test bench for automotive shock absorbers. Background Art

[0002] Automotive shock absorbers are vulnerable parts during the use of automobiles. The performance of shock absorbers directly affects the driving smoothness of automobiles and the service life of other components. Therefore, shock absorbers should always be in good working condition. It converts the vibration energy generated during vehicle driving into heat through hydraulic or pneumatic principles, thereby effectively reducing vehicle swaying and rocking. Shock absorbers also help maintain close contact between the tires and the ground, improving traction and handling.

[0003] Currently, during the manufacturing process of automotive shock absorbers, durability testing of automotive shock absorbers is required. Current testing devices often continuously squeeze both ends of the automotive shock absorber to simulate the operating environment of the automotive shock absorber under normal conditions. However, during actual use, when the vehicle encounters bumpy roads with a certain height difference during driving, the automotive shock absorber will be subjected to rapid impacts. There are few durability testing items in this case, and thus the durability testing of automotive shock absorbers is not comprehensive enough.

[0004] Therefore, we propose a durability test bench for automotive shock absorbers. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems existing in the prior art, and propose a durability test bench for automotive shock absorbers.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions: A durability test bench for automotive shock absorbers, including a machine platform. A test bench is fixedly connected to the machine platform through a plurality of support columns. A through hole is opened on the top wall of the test bench. A rotating plate is rotatably connected to the inner wall of the through hole through a rotating shaft. A rectangular hole is opened on the side wall of the rotating plate. A support plate is fixedly connected to the top wall of the test bench. A detection column is slidably connected through the inner wall of the support plate. A return spring is sleeved and fixed on the side wall of the detection column. The other end of the return spring is fixedly connected to the side wall of the support plate. A synchronous shaft is fixedly connected to the side wall of the detection column. A rear mounting bracket with an automatic locking function is slidably connected to the top wall of the test bench. A front mounting bracket is slidably connected to the top of the test bench. A first chute and a second chute are opened on the machine platform. A driving block is slidably connected to the inner wall of the first chute. A push rod is fixedly connected to the side wall of the driving block; A switching mechanism for switching the execution state of the driving block is provided on the machine platform.

[0007] Preferably, the switching mechanism includes a groove formed in the side wall of the driving block. The inner wall of the groove is elastically connected with a first wedge-shaped block through a first spring. A long strip block is slidably connected to the inner wall of the second chute. A push column is fixedly connected to the side wall of the long strip block. A strong spring is fixedly connected to the side wall of the driving block. A connecting plate is fixedly connected to the inner wall of the groove. The other end of the strong spring is fixedly connected to the side wall of the connecting plate. A second wedge-shaped block is fixedly connected to the top wall of the machine table.

[0008] Preferably, the switching mechanism further includes a driving motor fixedly connected to the machine table. The output end of the driving motor is fixedly connected with a main shaft. A first connecting rod is fixedly connected to the side wall of the end of the main shaft away from the driving motor. The other end of the first connecting rod is rotatably connected with a second connecting rod. An adjusting groove is formed in the inner wall of the long strip block. A micro motor is fixedly connected to the inner side wall of the adjusting groove. The output end of the micro motor is fixedly connected with a lead screw. A nut is threadedly connected to the side wall of the lead screw. A slider is fixedly connected to the top wall of the nut. The other end of the second connecting rod away from the first connecting rod is rotatably connected to the side wall of the slider.

[0009] Preferably, a display screen is installed on the detection table. The push column is in contact with the first wedge-shaped block. The first wedge-shaped block slides against the second wedge-shaped block. The push column and the second wedge-shaped block are arranged in a dislocation manner. The push rod slides against the rotating plate.

[0010] Preferably, semi-sealed boxes are symmetrically and slidably connected to the top wall of the detection table. A communication pipe is fixedly embedded and connected to the inner wall of each semi-sealed box. A temperature sensor is fixedly connected to the inner side wall of the semi-sealed box.

[0011] Preferably, a cam is fixedly connected to the side wall of the main shaft through a one-way bearing. A circulation box is fixedly connected to the machine table through a lifting column. A piston is hermetically and slidably connected inside the circulation box. The side wall of the piston is elastically connected to the inner wall of the circulation box through a restoring spring. A matching plate is fixedly connected to the side wall of the piston. The matching plate hermetically penetrates and slides through the side wall of the circulation box.

[0012] Preferably, a heat preservation box is fixed on the machine table. A plurality of heating resistance tubes are fixedly embedded and installed on the inner wall of the heat preservation box. A plurality of first one-way tubes and a plurality of second one-way tubes are fixedly connected through the inner wall of the circulation box. The end of the first one-way tube away from the circulation box is fixedly communicated with one end of one of the communication pipes. The other end of the communication pipe is fixedly communicated with the heat preservation box. The end of the second one-way tube away from the circulation box is fixedly communicated with the other end of the heat preservation box.

[0013] Preferably, an electromagnet is fixedly embedded and installed on the side wall of the semi-sealed box. The temperature sensor is electrically connected to the display screen.

[0014] Preferably, a pressure sensor is fixedly installed at one end of the detection column, and the pressure sensor is electrically connected to the display screen.

[0015] Preferably, the synchronization shaft is slidably connected inside the rectangular hole, and the first wedge-shaped block is slidably connected inside the groove.

[0016] Compared with the existing technology, the advantages of the present invention are as follows: 1. By setting up structures such as multiple connecting rods, sliders, and rotating plates, the detection column will drive the rear mounting frame in contact with it to slide and squeeze the vehicle shock absorber, thereby completing the extrusion test of the vehicle shock absorber. Subsequently, by continuously repeating the above process, the cyclic detection of continuous extrusion - relaxation - extrusion relaxation of the vehicle shock absorber under normal road conditions can be carried out; 2. Since the rotating plate and the rotating shaft form a lever mechanism, and through the setting of the distance of the rotating shaft on the side wall of the rotating plate, a greater acting force is generated on the upper part of the rotating plate to drive the detection column to slide to the right for extrusion detection; 3. When it is necessary to simulate a collision test on the vehicle shock absorber, at this time, the vehicle shock absorber is driven by the rear mounting frame to move away from the detection column by a certain distance, and then the rear mounting frame is fixed. By setting up structures such as nuts, driving blocks, and strong springs, under the action of the compressed strong spring, the driving block will quickly slide to the left by a certain distance. The driving block drives the detection column to quickly slide to the right through the push rod, rotating plate, rectangular hole, and synchronization shaft until the detection column abuts against the front mounting frame for impact extrusion, simulating the scenario of a rapid impact when the vehicle shock absorber encounters a bumpy road condition; 4. When it is necessary to conduct durability testing on the vehicle shock absorber at different temperatures, at this time, the heating resistance tube is energized to raise the temperature of the heating oil inside the circulation tank. By setting up structures such as one-way bearings, pistons, and circulation pipes, the heating oil is continuously circulated and heated inside the circulation pipe to increase the ambient temperature during the detection of the vehicle shock absorber, simulating the durability of the vehicle shock absorber during use under high-temperature conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the external structure of a vehicle shock absorber durability test bench proposed by the present invention; Figure 2 is a top view schematic diagram of a vehicle shock absorber durability test bench proposed by the present invention; Figure 3 is a schematic diagram of the connection relationship between the rotating shaft and the rotating plate in a vehicle shock absorber durability test bench proposed by the present invention; Figure 4 is a schematic diagram of the internal structure of the adjustment groove in a vehicle shock absorber durability test bench proposed by the present invention; Figure 5Schematic diagram of the internal structures of the circulation tank and the insulation tank in a durability test bench for an automotive shock absorber proposed by the present invention; Figure 6 Schematic diagram of the internal structure of a groove in a durability test bench for an automotive shock absorber proposed by the present invention.

[0018] In the figure: 1, machine table; 2, support column; 3, test bench; 4, first chute; 5, drive block; 6, push rod; 7, rotating plate; 8, rotating shaft; 9, rectangular hole; 10, synchronizing shaft; 11, test column; 12, support plate; 13, return spring; 14, pressure sensor; 15, display screen; 16, groove; 17, first spring; 18, first wedge block; 19, push column; 20, second chute; 21, long strip; 22, adjustment groove; 23, lead screw; 24, slider; 25, second connecting rod; 26, first connecting rod; 27, second wedge block; 28, strong spring; 29, drive motor; 30, main shaft; 31, cam; 32, circulation tank; 33, piston; 34, restoration spring; 35, heating resistance tube; 36, first one-way tube; 37, second one-way tube; 38, semi-sealed box; 39, temperature sensor; 40, connecting pipe; 41, micro motor; 42, through hole; 43, rear mounting bracket; 44, front mounting bracket; 45, one-way bearing; 46, mating plate; 47, electromagnet; 48, nut; 49, connecting plate; 50, insulation tank. Specific embodiments

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Refer to Figure 1 - Figure 6, An automotive shock absorber durability test bench, including a machine platform 1, on which a test bench 3 is fixedly connected through multiple support columns 2. A through hole 42 is opened on the top wall of the test bench 3, and a rotating shaft 8 is rotatably connected to the inner wall of the through hole 42. A rotating plate 7 is fixedly connected to the side wall of the rotating shaft 8. The top of the rotating plate 7 is in a concave shape. A rectangular hole 9 is opened on the side wall of the rotating plate 7. A support plate 12 is fixedly connected to the top wall of the test bench 3. A detection column 11 is slidably connected through the inner wall of the support plate 12. A return spring 13 is sleeved and fixed on the side wall of the detection column 11. The spring constant of the return spring 13 is relatively small. The other end of the return spring 13 is fixedly connected to the side wall of the support plate 12. A synchronous shaft 10 is fixedly connected to the side wall of the detection column 11. A rear mounting frame 43 is slidably connected to the top wall of the test bench 3, and the rear mounting frame 43 can be automatically locked on the top wall of the test bench 3 after sliding adjustment. A front mounting frame 44 is slidably connected to the top of the test bench 3. A first chute 4 and a second chute 20 are opened on the machine platform 1. A driving block 5 is slidably connected to the inner wall of the first chute 4. A push rod 6 is fixedly connected to the side wall of the driving block 5; A switching mechanism for switching the execution state of the driving block 5 is provided on the machine platform 1.

[0021] The switching mechanism includes a groove 16 opened on the side wall of the driving block 5 (as Figure 6 shown). A first wedge-shaped block 18 is elastically connected to the inner wall of the groove 16 through a first spring 17. A long strip 21 is slidably connected to the inner wall of the second chute 20. A push column 19 is fixedly connected to the side wall of the long strip 21. A strong spring 28 is fixedly connected to the side wall of the driving block 5. The spring constant of the strong spring 28 is relatively large, and the anti-bending ability of the strong spring 28 is good, or the side of the strong spring 28 is abutted against the inner wall of the first chute 4 for limitation. A connecting plate 49 is fixedly connected to the inner wall of the first chute 4. The other end of the strong spring 28 is fixedly connected to the side wall of the connecting plate 49. A second wedge-shaped block 27 is fixedly connected to the top wall of the machine platform 1.

[0022] The switching mechanism further includes a driving motor 29 fixedly connected to the machine platform 1. The output end of the driving motor 29 is fixedly connected with a main shaft 30. A first connecting rod 26 is fixedly connected to the side wall of the end of the main shaft 30 away from the driving motor 29. The other end of the first connecting rod 26 is rotatably connected with a second connecting rod 25. An adjustment groove 22 is opened on the inner wall of the long strip 21. A micro motor 41 is fixedly connected to the inner side wall of the adjustment groove 22. The output end of the micro motor 41 is fixedly connected with a lead screw 23. A nut 48 is threadedly connected to the side wall of the lead screw 23. The nut 48 abuts and slides against the side wall of the adjustment groove 22. A slider 24 is fixedly connected to the top wall of the nut 48. The other end of the second connecting rod 25 away from the first connecting rod 26 is rotatably connected to the side wall of the slider 24.

[0023] A display screen 15 is installed on the detection table 3. After the push column 19 moves a certain distance, it comes into contact with the first wedge block 18. After the first wedge block 18 moves a certain distance, it slides against the second wedge block 27. The push column 19 and the second wedge block 27 are arranged in a dislocation manner, and the push rod 6 slides against the rotating plate 7.

[0024] On the top wall of the detection table 3, two semi-sealed boxes 38 are symmetrically and slidably connected. The two semi-sealed boxes 38 can slide away from or close to each other. A communication pipe 40 is fixedly connected by embedding on the inner wall of each semi-sealed box 38, and a temperature sensor 39 is fixedly connected to the inner side wall of the semi-sealed box 38.

[0025] On the side wall of the main shaft 30, a cam 31 is fixedly connected through a one-way bearing 45. The one-way bearing 45 is a prior art. The one-way bearing 45 is a bearing that can rotate freely in one direction and is locked in the other direction. On the machine table 1, a circulation box 32 is fixedly connected through a lifting column. Inside the circulation box 32, a piston 33 is hermetically and slidably connected. The side wall of the piston 33 is elastically connected to the inner wall of the circulation box 32 through a restoring spring 34. A matching plate 46 is fixedly connected to the side wall of the piston 33, and the matching plate 46 hermetically penetrates and slidably connects through the side wall of the circulation box 32.

[0026] On the machine table 1, a heat preservation box 50 is fixed. A plurality of heating resistance tubes 35 are fixedly connected by embedding on the inner wall of the heat preservation box 50. Two first one-way tubes 36 and two second one-way tubes 37 are fixedly connected through the inner wall of the circulation box 32. One end of the first one-way tube 36 away from the circulation box 32 is fixedly communicated with one end of one of the communication pipes 40, and the other end of this communication pipe 40 is fixedly communicated with the heat preservation box 50. One end of the second one-way tube 37 away from the circulation box 32 is fixedly communicated with the other end of the heat preservation box 50.

[0027] An electromagnet 47 is fixedly connected by embedding on the side wall of the semi-sealed box 38. The electromagnets 47 embedded on the side walls of the two semi-sealed boxes 38 have opposite polarities and are mutually magnetic attractive forces. The temperature sensor 39 is electrically connected to the display screen 15, and the use environment temperature of the vehicle shock absorber is judged by the temperature displayed on the display screen 15 through the temperature sensor 39.

[0028] One end of the detection column 11 is fixedly installed with a pressure sensor 14. The pressure sensor 14 is electrically connected to the display screen 15, and the extrusion force of the detection column 11 acting on the rear mounting bracket 43 is displayed on the display screen 15 by the pressure sensor 14.

[0029] The synchronous shaft 10 is slidably connected inside the rectangular hole 9, and the first wedge block 18 is slidably connected inside the groove 16.

[0030] In the present invention, the inspector fixedly installs both ends of the vehicle shock absorber to be subjected to durability testing to the front mounting bracket 44 and the rear mounting bracket 43 respectively, simulating the actual use scenario of the vehicle shock absorber. Then, the rear mounting bracket 43 is slid and adjusted by a certain distance and then locked and fixed, so that the rear mounting bracket 43 abuts and presses against one end of the detection column 11, and the vehicle shock absorber is in a compressed state. And the position of the adjusting nut 48 on the right part of the lead screw 23 is adjusted by the micro motor 41.

[0031] Then, the inspector turns on the driving motor 29. The driving motor 29 is a forward and reverse motor. When the output end of the driving motor 29 drives the main shaft 30 to rotate clockwise, at this time, under the action of the one-way bearing 45, the cam 31 will not rotate. Then, the main shaft 30 will drive the first connecting rod 26 fixedly connected thereto to rotate, so that the first connecting rod 26 drives the second connecting rod 25 connected thereto to move. The second connecting rod 25 drives the slider 24 to slide reciprocally in the horizontal direction. The slider 24 drives the long strip 21 to move synchronously through the nut 48 and the lead screw 23. When the long strip 21 slides from right to left (as Figure 3 shown), under the elastic force of the strong spring 28, the push column 19 fixedly connected to the side wall of the long strip 21 will always abut against the side wall of the first wedge block 18. The driving block 5 will drive the rotating plate 7 to rotate clockwise by a certain angle through the push rod 6, so that the rotating plate 7 drives the synchronous shaft 10 and the detection column 11 to slide to the right by a certain distance through the rectangular hole 9. Then, the detection column 11 will drive the rear mounting bracket 43 in contact with it to slide in the same direction by a certain distance. The rear mounting bracket 43 will squeeze the vehicle shock absorber. And because the rotating plate 7 and the rotating shaft 8 form a lever mechanism, and through the setting of the distance of the rotating shaft 8 on the side wall of the rotating plate 7, a greater acting force is generated on the upper part of the rotating plate 7 to drive the detection column 11 to slide to the right for extrusion detection.

[0032] When the long strip 21 slides from left to right, since the nut 48 is located at the right part of the lead screw 23 at this time (as Figure 3 shown), then the push column 19 will drive the driving block 5 to move synchronously to the right to squeeze the strong spring 28 through the first wedge block 18. Then, during the process of the driving block 5 sliding to the right, the first wedge block 18 will not abut against the second wedge block 27. Under the elastic force of the return spring 13, the detection column 11 will slide reversely by a certain distance, thereby completing the extrusion test of the vehicle shock absorber. Subsequently, the above process is continuously repeated to perform the cyclic detection of continuous extrusion - relaxation - extrusion - relaxation of the vehicle shock absorber under normal road conditions.

[0033] When a simulated collision test of the automobile shock absorber is required, the rear mounting frame 43 is moved so that the rear mounting frame 43 drives the automobile shock absorber away from the detection column 11 for a distance, and then the rear mounting frame 43 and the detection platform 3 are fixed, and the micro motor 41 is turned on. The output end of the micro motor 41 drives the lead screw 23 to rotate. Since the side wall of the lead screw 23 is threadedly connected with a nut 48, the position of the nut 48 on the lead screw 23 will change, and then the nut 48 is finally located at the leftmost position of the lead screw 23. Then, the drive motor 29 is turned on again to make the long strip 21 reciprocate in the horizontal direction. The long strip 21 will drive the push column 19 to move synchronously during the sliding to the right, and the push column 19 passes through the first wedge block 1 8 drives the driving block 5 to move right synchronously, so that the driving block 5 continuously squeezes the strong spring 28 until the first wedge block 18 and the second wedge block 27 contact each other, then the first wedge block 18 will slide a distance inside the groove 16 until the first wedge block 18 and the push column 19 are separated from each other, then under the action of the compressed strong spring 28, the driving block 5 will quickly slide a distance to the left, and then the driving block 5 drives the rotating plate 7 to rotate quickly through the push rod 6, and the rotating plate 7 drives the detection column 11 to slide quickly to the right through the rectangular hole 9 and the synchronous shaft 10 until the detection column 11 contacts the front mounting frame 44 for collision and extrusion, simulating the scene of rapid impact when the shock absorber of the detection car encounters bumpy road conditions. When the long strip block 21 moves to the left, the long strip block 21 drives the push column 19 and the inclined surface of the first wedge block 18 to contact each other, and then pushes the first wedge block 18 to slide a distance inside the groove 16, and then the above process is repeated continuously.

[0034] Each time the detection column 11 and the rear mounting frame 43 come into contact with each other, the squeezing force applied to the automobile shock absorber will be displayed on the display screen 15 under the action of the pressure sensor 14, so as to facilitate the detection personnel to make judgments and records.

[0035] When durability testing of automotive shock absorbers at different temperatures is required, the heating resistance tube 35 is energized at this time to raise the temperature of the heating oil inside the circulation tank 32. Then, the two semi-sealed boxes 38 are pushed, so that the two semi-sealed boxes 38 are mutually attached to the side of the automotive shock absorber. Then, the output end of the drive motor 29 rotates in the reverse direction by a certain angle. At this time, under the action of the one-way bearing 45, the one-way bearing 45 will also drive the cam 31 to rotate synchronously, so that the cam 31 drives the mating plate 46 that slides against it to reciprocate on the side wall of the circulation tank 32. Furthermore, the mating plate 46 drives the piston 33 to reciprocate and slide in a sealed manner inside the circulation tank 32. Then, the piston 33 will squeeze the heating oil inside the circulation tank 32 into the corresponding communication pipe 40 through the first one-way pipe 36 for circulation. The original heating oil inside the communication pipe 40 will enter the heat preservation box 50 for heating. And the piston 33 will pump the heated heating oil inside the heat preservation box 50 into the circulation tank 32 through the second one-way pipe 37. Thus, the heating oil is continuously circulated and heated inside the communication pipe 40, increasing the environmental temperature during the detection of automotive shock absorbers and simulating the durability of automotive shock absorbers during use under high-temperature conditions.

[0036] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. An automotive shock absorber durability test bench, comprising a machine table (1), characterized in that, A detection table (3) is fixedly connected to the machine table (1) through a plurality of support columns (2). A through hole (42) is formed in the top wall of the detection table (3). A rotating plate (7) is rotatably connected to the inner wall of the through hole (42) through a rotating shaft (8). A rectangular hole (9) is formed in the side wall of the rotating plate (7). A support plate (12) is fixedly connected to the top wall of the detection table (3). A detection column (11) is slidably connected through the inner wall of the support plate (12). A return spring (13) is sleeved and fixed on the side wall of the detection column (11). The other end of the return spring (13) is fixedly connected to the side wall of the support plate (12). A synchronous shaft (10) is fixedly connected to the side wall of the detection column (11). A rear mounting frame (43) with an automatic locking function is slidably connected to the top wall of the detection table (3). A front mounting frame (44) is slidably connected to the top of the detection table (3). A first chute (4) and a second chute (20) are formed in the machine table (1). A driving block (5) is slidably connected to the inner wall of the first chute (4). A push rod (6) is fixedly connected to the side wall of the driving block (5); A switching mechanism for switching the execution state of the driving block (5) is provided on the machine table (1).

2. The durability test bench for an automotive shock absorber according to claim 1, characterized in that The switching mechanism includes a groove (16) formed in the side wall of the driving block (5). A first wedge block (18) is elastically connected to the inner wall of the groove (16) through a first spring (17). A long strip block (21) is slidably connected to the inner wall of the second chute (20). A push column (19) is fixedly connected to the side wall of the long strip block (21). A strong spring (28) is fixedly connected to the side wall of the driving block (5). A connecting plate (49) is fixedly connected to the inner wall of the groove (16). The other end of the strong spring (28) is fixedly connected to the side wall of the connecting plate (49). A second wedge block (27) is fixedly connected to the top wall of the machine table (1).

3. The automotive shock absorber durability test bench according to claim 2, wherein, The switching mechanism further includes a driving motor (29) fixedly connected to the machine table (1). The output end of the driving motor (29) is fixedly connected to a main shaft (30). A first connecting rod (26) is fixedly connected to the side wall of the end of the main shaft (30) far from the driving motor (29). The other end of the first connecting rod (26) is rotatably connected to a second connecting rod (25). An adjusting groove (22) is formed in the inner wall of the long strip block (21). A micro motor (41) is fixedly connected to the inner side wall of the adjusting groove (22). The output end of the micro motor (41) is fixedly connected to a lead screw (23). A nut (48) is threadedly connected to the side wall of the lead screw (23). A slider (24) is fixedly connected to the top wall of the nut (48). The other end of the second connecting rod (25) far from the first connecting rod (26) is rotatably connected to the side wall of the slider (24).

4. The automotive shock absorber durability test bench according to claim 3, characterized in that A display screen (15) is installed on the detection table (3). The push column (19) is in contact with the first wedge block (18). The first wedge block (18) slides against the second wedge block (27). The push column (19) and the second wedge block (27) are arranged in a staggered manner. The push rod (6) slides against the rotating plate (7).

5. The durability test bench for an automotive shock absorber according to claim 4, characterized in that, On the top wall of the detection table (3), semi-sealed boxes (38) are symmetrically and slidably connected. Inside the wall of each semi-sealed box (38), a communicating pipe (40) is embedded and fixedly connected. On the inner side wall of the semi-sealed box (38), a temperature sensor (39) is fixedly connected.

6. The automotive shock absorber durability test bench according to claim 5, characterized in that, On the side wall of the main shaft (30), a cam (31) is fixedly connected through a one-way bearing (45). On the machine table (1), a circulation box (32) is fixedly connected through a lifting column. Inside the circulation box (32), a piston (33) is hermetically and slidably connected. On the side wall of the piston (33), it is elastically connected to the inner wall of the circulation box (32) through a restoring spring (34). On the side wall of the piston (33), a mating plate (46) is fixedly connected. The mating plate (46) hermetically penetrates and slidably connects through the side wall of the circulation box (32).

7. An automotive shock absorber durability test bench according to claim 6, characterized in that, On the machine table (1), a heat preservation box (50) is fixed. Inside the wall of the heat preservation box (50), a plurality of heating resistance tubes (35) are embedded and installed. Inside the wall of the circulation box (32), a plurality of first one-way tubes (36) and a plurality of second one-way tubes (37) are fixedly connected through. One end of the first one-way tube (36) far from the circulation box (32) is fixedly communicated with one end of one of the communicating pipes (40). The other end of the communicating pipe (40) is fixedly communicated with the heat preservation box (50). One end of the second one-way tube (37) far from the circulation box (32) is fixedly communicated with the other end of the heat preservation box (50).

8. A durability test bench for an automotive shock absorber according to claim 5, characterized in that, On the side wall of the semi-sealed box (38), an electromagnet (47) is embedded and installed. The temperature sensor (39) is electrically connected to the display screen (15).

9. The durability test bench for an automotive shock absorber according to claim 4, characterized in that, At one end of the detection column (11), a pressure sensor (14) is fixedly installed. The pressure sensor (14) is electrically connected to the display screen (15).

10. A durability test bench for an automotive shock absorber according to claim 2, characterized in that, The synchronous shaft (10) is slidably connected inside the rectangular hole (9). The first wedge-shaped block (18) is slidably connected inside the groove (16).

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