Automobile shock absorber endurance detection bench

Abstract

The application relates to the technical field of detection benches, and particularly relates to a kind of automobile shock absorber endurance detection bench, including machine table, the detection bench is fixedly connected with detection table on the machine table through multiple support columns, the top wall of the detection table is provided with through hole, the inner wall of the through hole is rotatably connected with rotary plate through pivot, the side wall of the rotary plate is provided with rectangular hole, the top wall of the detection table is fixedly connected with support plate, the inner wall of the support plate is slidably connected with detection column, the side wall of the detection column is fixedly connected with return spring, the other end of the return spring is fixedly connected with the side wall of the support plate. The application is provided with multiple connecting rods, sliding blocks and rotary plates and other structures, the detection column will drive the rear mounting bracket in contact with it to slide and press the automobile shock absorber, and then the extrusion test of the automobile shock absorber is completed, and then the above process is repeated, so that the automobile shock absorber can be continuously extruded, relaxed, extruded and relaxed in the regular road condition.

Description

Technical Field

[0001] This invention relates to the field of testing bench technology, and specifically to a durability testing bench for automotive shock absorbers. Background Technology

[0002] Car shock absorbers are wear-prone parts during vehicle use. Their performance directly affects the vehicle's ride smoothness and the lifespan of other components; therefore, they should be kept in good working order at all times. They convert the vibration energy generated during vehicle operation into heat through hydraulic or pneumatic principles, effectively reducing vehicle swaying and shaking. Shock absorbers also help maintain close contact between the tires and the ground, improving traction and handling.

[0003] Currently, in the manufacturing process of automotive shock absorbers, durability testing is required. Current testing devices often continuously compress both ends of the shock absorber to simulate its normal operating environment. However, in actual use, when a vehicle encounters bumpy road sections with significant height differences, the shock absorber is subjected to rapid impacts. In such cases, there are fewer durability testing items, resulting in an incomplete durability test for automotive shock absorbers.

[0004] To address this, we propose a durability testing bench for automotive shock absorbers. Summary of the Invention

[0005] The purpose of this invention is to solve the problems existing in the prior art by proposing a durability testing bench for automotive shock absorbers.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A durability testing bench for automotive shock absorbers includes a machine base. A testing platform is fixedly connected to the machine base via multiple support columns. The top wall of the testing platform has a through hole, and a rotating plate is rotatably connected to the inner wall of the through hole via a rotating shaft. A rectangular hole is formed in the side wall of the rotating plate. A support plate is fixedly connected to the top wall of the testing platform. A testing column is slidably connected through the inner wall of the support plate. A return spring is sleeved and fixedly installed on the side wall of the testing 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 testing column. A rear mounting bracket with an automatic locking function is slidably connected to the top wall of the testing platform. A front mounting bracket is slidably connected to the top of the testing platform. The machine base has a first slide groove and a second slide groove. A driving block is slidably connected to the inner wall of the first slide groove, and a push rod is fixedly connected to the side wall of the driving block.

[0008] The machine tool is equipped with a switching mechanism for switching the execution state of the drive block.

[0009] Preferably, the switching mechanism includes a groove formed on the side wall of the drive block, a first wedge block elastically connected to the inner wall of the groove by a first spring, a long strip block slidably connected to the inner wall of the second slide, a push column fixedly connected to the side wall of the long strip block, a powerful spring fixedly connected to the side wall of the drive block, a connecting plate fixedly connected to the inner wall of the groove, the other end of the powerful spring being fixedly connected to the side wall of the connecting plate, and a second wedge block fixedly connected to the top wall of the machine platform.

[0010] Preferably, the switching mechanism further includes a drive motor fixedly connected to the machine base, the output end of the drive motor being fixedly connected to a main shaft, the side wall of the main shaft away from the drive motor being fixedly connected to a first connecting rod, the other end of the first connecting rod being rotatably connected to a second connecting rod, an adjustment groove being provided on the inner wall of the elongated block, a micro motor being fixedly connected to the inner side wall of the adjustment groove, a lead screw being fixedly connected to the output end of the micro motor, a nut being threadedly connected to the side wall of the lead screw, a slider being fixedly connected to the top wall of the nut, and the end of the second connecting rod away from the first connecting rod being rotatably connected to the side wall of the slider.

[0011] Preferably, a display screen is installed on the testing platform, the push column and the first wedge block are in contact with each other, the first wedge block and the second wedge block slide against each other, the push column and the second wedge block are misaligned, and the push rod and the rotating plate slide against each other.

[0012] Preferably, the top wall of the testing platform is symmetrically slidably connected with semi-sealed boxes, and each semi-sealed box has a connecting pipe embedded and fixedly connected to its inner wall, and a temperature sensor is fixedly connected to its inner side wall.

[0013] Preferably, a cam is fixedly connected to the side wall of the main shaft via a one-way bearing, a circulation box is fixedly connected to the machine base via a lifting column, a piston is slidably connected inside the circulation box, the side wall of the piston is elastically connected to the inner wall of the circulation box via a restoring spring, a mating plate is fixedly connected to the side wall of the piston, and the mating plate is slidably connected to the side wall of the circulation box in a sealed manner.

[0014] Preferably, a heat preservation box is fixed on the machine base, and multiple heating resistance tubes are embedded in the inner wall of the heat preservation box. Multiple first one-way tubes and multiple 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 connected to one end of a connecting tube, and the other end of the connecting tube is fixedly connected to the heat preservation box. The end of the second one-way tube away from the circulation box is fixedly connected to the other end of the heat preservation box.

[0015] Preferably, an electromagnet is embedded in the side wall of the semi-sealed box, and the temperature sensor and the display screen are electrically connected.

[0016] 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.

[0017] Preferably, the synchronous shaft is slidably connected inside the rectangular hole, and the first wedge block is slidably connected inside the groove.

[0018] Compared with existing technologies, the advantages of this invention are:

[0019] 1. By setting up multiple linkages, sliders and rotating plates, the test column will drive the rear mounting bracket that is in contact with it to slide and squeeze the car shock absorber, thereby completing the compression test of the car shock absorber. Then, by continuously repeating the above process, the continuous compression-relaxation-compression-relaxation cycle test of the car shock absorber under normal road conditions can be carried out.

[0020] 2. Since the rotating plate and the rotating shaft form a lever mechanism, and the distance of the rotating shaft from the side wall of the rotating plate is set, a greater force is generated on the upper part of the rotating plate to drive the detection column to slide to the right for compression detection;

[0021] 3. When a simulated impact test is required for a car shock absorber, the rear mounting bracket is used to move the car shock absorber away from the test post a certain distance. Then, the rear mounting bracket is fixed. By setting up a nut, drive block, and strong spring, the drive block will quickly slide to the left a certain distance under the action of the compressed strong spring. The drive block drives the test post to slide quickly to the right through the push rod, rotating plate, rectangular hole, and synchronous shaft until the test post comes into contact with the front mounting bracket and impacts and squeezes, simulating the scenario of the car shock absorber encountering a bumpy road condition and experiencing a rapid impact.

[0022] 4. When it is necessary to conduct durability tests on automotive shock absorbers at different temperatures, the heating resistance tube is energized to heat the heating oil inside the circulation tank. By setting up structures such as one-way bearings, pistons, and circulation tubes, the heating oil is continuously circulated and heated inside the circulation tubes, increasing the ambient temperature during the testing of the automotive shock absorbers and simulating the durability of automotive shock absorbers during use under high temperature conditions. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the external structure of a durability testing bench for automotive shock absorbers proposed in this invention.

[0024] Figure 2 This is a top view schematic diagram of a durability testing bench for automotive shock absorbers proposed in this invention;

[0025] Figure 3 This is a schematic diagram showing the connection relationship between the rotating shaft and the rotating plate in a durability testing bench for automotive shock absorbers proposed in this invention.

[0026] Figure 4 This is a schematic diagram of the internal structure of the adjustment groove in a durability testing bench for automotive shock absorbers proposed in this invention.

[0027] Figure 5 This is a schematic diagram of the internal structure of the circulation box and the insulation box in a durability testing bench for automotive shock absorbers proposed in this invention.

[0028] Figure 6 This is a schematic diagram of the internal structure of the groove in a durability testing bench for automotive shock absorbers proposed in this invention.

[0029] In the diagram: 1. Machine base; 2. Support column; 3. Detection table; 4. First slide groove; 5. Drive block; 6. Push rod; 7. Rotating plate; 8. Rotating shaft; 9. Rectangular hole; 10. Synchronous shaft; 11. Detection 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 slide groove; 21. Long strip block; 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 box; 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 tube; 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 box. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Reference Figure 1 - Figure 6A durability testing bench for automotive shock absorbers includes a machine base 1. A testing platform 3 is fixedly connected to the machine base 1 via multiple support columns 2. A through hole 42 is formed in the top wall of the testing platform 3. 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 has a U-shaped structure, and 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 testing platform 3. A testing column 11 is slidably connected through the inner wall of the support plate 12. A return spring 13 is sleeved and fixed to the side wall of the testing column 11. The spring 13 has a small stiffness coefficient. The other end of the return spring 13 is fixedly connected to the side wall of the support plate 12. The side wall of the detection column 11 is fixedly connected to the synchronous shaft 10. The top wall of the detection table 3 is slidably connected to the rear mounting bracket 43, and the rear mounting bracket 43 can be automatically locked to the top wall of the detection table 3 after sliding adjustment. The top of the detection table 3 is slidably connected to the front mounting bracket 44. The machine base 1 is provided with a first slide groove 4 and a second slide groove 20. The inner wall of the first slide groove 4 is slidably connected to the drive block 5, and the side wall of the drive block 5 is fixedly connected to the push rod 6.

[0032] The machine tool 1 is equipped with a switching mechanism for switching the execution state of the drive block 5.

[0033] The switching mechanism includes a groove 16 (such as) formed on the side wall of the drive block 5. Figure 6 As shown), the inner wall of the groove 16 is elastically connected to the first wedge block 18 via the first spring 17, the inner wall of the second slide 20 is slidably connected to the long strip block 21, the side wall of the long strip block 21 is fixedly connected to the push column 19, the side wall of the drive block 5 is fixedly connected to the strong spring 28, the strong spring 28 has a large stiffness coefficient and good bending resistance, or the side of the strong spring 28 is in contact with the inner wall of the first slide 4 for limiting, the inner wall of the first slide 4 is fixedly connected to the connecting plate 49, the other end of the strong spring 28 is fixedly connected to the side wall of the connecting plate 49, and the top wall of the machine base 1 is fixedly connected to the second wedge block 27.

[0034] The switching mechanism also includes a drive motor 29 fixedly connected to the machine base 1. The output end of the drive motor 29 is fixedly connected to a main shaft 30. The side wall of the main shaft 30 away from the drive motor 29 is fixedly connected to a first connecting rod 26. The other end of the first connecting rod 26 is rotatably connected to 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. A lead screw 23 is fixedly connected to the output end of the micro motor 41. A nut 48 is threadedly connected to the side wall of the lead screw 23. The nut 48 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 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.

[0035] The testing platform 3 is equipped with a display screen 15. 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 misaligned. The push rod 6 slides against the rotating plate 7.

[0036] The top wall of the testing platform 3 is symmetrically connected with semi-sealed boxes 38. The two semi-sealed boxes 38 can slide away from each other or come close together. Each semi-sealed box 38 has a connecting pipe 40 embedded and fixedly connected to its inner wall. A temperature sensor 39 is fixedly connected to the inner side wall of the semi-sealed box 38.

[0037] A cam 31 is fixedly connected to the side wall of the main shaft 30 via a one-way bearing 45. The one-way bearing 45 is existing technology. The one-way bearing 45 is a type of bearing that can rotate freely in one direction and is locked in the other direction. A circulation box 32 is fixedly connected to the machine base 1 via a lifting column. A piston 33 is slidably connected inside the circulation box 32. The side wall of the piston 33 is elastically connected to the inner wall of the circulation box 32 via a restoring spring 34. A mating plate 46 is fixedly connected to the side wall of the piston 33. The mating plate 46 is slidably connected to the side wall of the circulation box 32 in a sealed manner.

[0038] A heat preservation box 50 is fixed on the machine 1. Multiple heating resistance tubes 35 are embedded in 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. The end of the first one-way tube 36 away from the circulation box 32 is fixedly connected to one end of a connecting tube 40. The other end of the connecting tube 40 is fixedly connected to the heat preservation box 50. The end of the second one-way tube 37 away from the circulation box 32 is fixedly connected to the other end of the heat preservation box 50.

[0039] Electromagnets 47 are embedded in the side wall of the semi-sealed box 38. The electromagnets 47 embedded in the side wall of the two semi-sealed boxes 38 have opposite polarities and are magnetically attracted to each other. The temperature sensor 39 is electrically connected to the display screen 15. The ambient temperature of the car shock absorber is determined by the temperature displayed on the display screen 15 by the temperature sensor 39.

[0040] A pressure sensor 14 is fixedly installed at one end of the detection column 11. The pressure sensor 14 is electrically connected to the display screen 15. The pressure sensor 14 displays the squeezing force of the detection column 11 on the rear mounting bracket 43 on the display screen 15.

[0041] Synchronous shaft 10 is slidably connected inside rectangular hole 9, and first wedge block 18 is slidably connected inside groove 16.

[0042] In this invention, the inspector fixes the two ends of the car shock absorber that needs 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 car shock absorber. Then, the rear mounting bracket 43 is slidably adjusted to a certain distance and locked in place, so that the rear mounting bracket 43 and one end of the test column 11 are pressed against each other, and the car shock absorber is under pressure. The nut 48 is adjusted to the right position of the lead screw 23 by the micro motor 41.

[0043] Next, the inspector turns on the drive motor 29. The drive motor 29 is a reversible motor. When the output of the drive motor 29 drives the main shaft 30 to rotate clockwise, the cam 31 will not rotate under the action of the one-way bearing 45. The main shaft 30 will then drive the first connecting rod 26, which is fixedly connected to it, to rotate. This causes the first connecting rod 26 to drive the second connecting rod 25, which is rotatably connected to it, to move. The second connecting rod 25 then drives the slider 24 to slide back and forth horizontally. The slider 24, through the nut 48 and the lead screw 23, drives the long block 21 to move synchronously. When the long block 21 slides from right to left (e.g....), Figure 3 As shown), under the elastic force of the strong spring 28, the push column 19 fixedly connected to the side wall of the long strip block 21 will always be in contact with the side wall of the first wedge block 18. The drive 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 a certain distance through the rectangular hole 9. Then the detection column 11 will drive the rear mounting bracket 43, which is in contact with it, to slide in the same direction a certain distance. The rear mounting bracket 43 will squeeze the car shock absorber. Since 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 from the side wall of the rotating plate 7, the upper part of the rotating plate 7 generates a greater force to drive the detection column 11 to slide to the right for compression detection.

[0044] When the long strip 21 slides from left to right, since the nut 48 is located on the right side of the lead screw 23 (as shown in the image), Figure 3 As shown), the push column 19 will drive the drive block 5 to move synchronously to the right through the first wedge block 18 to compress the strong spring 28. During the sliding of the drive block 5 to the right, the first wedge block 18 will not come into contact with the second wedge block 27. Under the elastic force of the return spring 13, the detection column 11 will slide in the opposite direction for a distance, thereby completing the compression test of the car shock absorber. Then, the above process is repeated continuously to perform the continuous compression-relaxation-compression-relaxation cycle test of the car shock absorber under normal road conditions.

[0045] When a simulated impact test is required for the car shock absorber, the rear mounting bracket 43 is moved to move the car shock absorber away from the test post 11 by a certain distance. Then, the rear mounting bracket 43 and the test 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 lead screw 23 has a nut 48 threaded on its side wall, the position of the nut 48 on the lead screw 23 will change, and the nut 48 will eventually be located at the leftmost position of the lead screw 23. Then, the drive motor 29 is turned on to make the long block 21 reciprocate horizontally. As the long block 21 slides to the right, it will drive the push post 19 to move synchronously. The push post 19 is then driven by the first wedge block 1. 8 drives the drive block 5 to move synchronously to the right, causing the drive block 5 to continuously compress the strong spring 28 until the first wedge block 18 and the second wedge block 27 come into contact. Then, the first wedge block 18 will slide a distance inside the groove 16 until the first wedge block 18 and the push post 19 disengage. Under the action of the compressed strong spring 28, the drive block 5 will quickly slide a distance to the left. Then, the drive block 5 drives the rotating plate 7 to rotate rapidly through the push rod 6. The rotating plate 7 then drives the detection post 11 to slide rapidly to the right through the rectangular hole 9 and the synchronous shaft 10 until the detection post 11 comes into contact with the front mounting bracket 44 and impacts and compresses, simulating the scenario of a car shock absorber encountering a bumpy road condition and rapidly impacting. When the long strip block 21 moves to the left, the long strip block 21 drives the push post 19 to come into contact with the inclined surface of the first wedge block 18, thus pushing the first wedge block 18 to slide a distance inside the groove 16, and then continuously repeating the above process.

[0046] Each time the test column 11 and the rear mounting bracket 43 come into contact, the pressure sensor 14 will display the squeezing force applied to the car shock absorber on the display screen 15, which is convenient for the test personnel to judge and record.

[0047] When durability testing of an automotive shock absorber is required at different temperatures, the heating resistance tube 35 is energized to heat the heating oil inside the circulation chamber 32. Then, the two semi-sealed chambers 38 are pushed, causing them to fit against the sides of the shock absorber. Next, the output of the drive motor 29 is rotated in the opposite 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. This causes the cam 31 to drive the mating plate 46, which slides against it, to slide back and forth on the side wall of the circulation chamber 32. In turn, the mating plate 46 drives the piston 33 to reciprocate within the circulation chamber 32. The internal seal of the ring box 32 slides back and forth. The piston 33 will squeeze the heating oil inside the circulation box 32 into the corresponding connecting pipe 40 through the first one-way pipe 36. The original heating oil in the connecting pipe 40 will enter the heat preservation box 50 for heating. The piston 33 will also draw the heated oil in the heat preservation box 50 into the circulation box 32 through the second one-way pipe 37. This continuously heats the heating oil in the connecting pipe 40, increasing the ambient temperature during the test of the car shock absorber and simulating the durability of the car shock absorber during use under high temperature conditions.

[0048] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A durability testing bench for automotive shock absorbers, comprising a machine base, characterized in that, A testing platform is fixedly connected to the machine base via multiple support columns. A through hole is formed in the top wall of the testing platform. A rotating plate is rotatably connected to the inner wall of the through hole via a rotating shaft. A rectangular hole is formed in the side wall of the rotating plate. A support plate is fixedly connected to the top wall of the testing platform. A testing column is slidably connected through the inner wall of the support plate. A return spring is sleeved and fixedly installed on the side wall of the testing 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 testing column. A rear mounting bracket with an automatic locking function is slidably connected to the top wall of the testing platform. A front mounting bracket is slidably connected to the top of the testing platform. A first sliding groove and a second sliding groove are formed on the machine base. A driving block is slidably connected to the inner wall of the first sliding groove. A push rod is fixedly connected to the side wall of the driving block. The machine base is equipped with a switching mechanism for switching the execution state of the drive block; The switching mechanism includes a groove formed on the side wall of the drive block, a first wedge block elastically connected to the inner wall of the groove by a first spring, a long strip block slidably connected to the inner wall of the second slide, a push column fixedly connected to the side wall of the long strip block, a powerful spring fixedly connected to the side wall of the drive block, a connecting plate fixedly connected to the inner wall of the groove, the other end of the powerful spring being fixedly connected to the side wall of the connecting plate, and a second wedge block fixedly connected to the top wall of the machine platform. The switching mechanism also includes a drive motor fixedly connected to the machine base. The output end of the drive motor is fixedly connected to a main shaft. A first connecting rod is fixedly connected to the side wall of the main shaft away from the drive motor. A second connecting rod is rotatably connected to the other end of the first connecting rod. An adjustment groove is opened on the inner wall of the long strip block. A micro motor is fixedly connected to the inner side wall of the adjustment groove. A lead screw is fixedly connected to the output end of the micro motor. 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 end of the second connecting rod away from the first connecting rod is rotatably connected to the side wall of the slider. A cam is fixedly connected to the side wall of the main shaft via a one-way bearing. A circulation box is fixedly connected to the machine base via a lifting column. A piston is slidably connected inside the circulation box. The side wall of the piston is elastically connected to the inner wall of the circulation box via a restoring spring. A mating plate is fixedly connected to the side wall of the piston. The mating plate is slidably connected to the side wall of the circulation box via a sealing through-hole connection.

2. The automotive shock absorber durability testing bench according to claim 1, characterized in that, The testing platform is equipped with a display screen. The push column and the first wedge block are in contact with each other. The first wedge block and the second wedge block slide against each other. The push column and the second wedge block are misaligned. The push rod and the rotating plate slide against each other.

3. The automotive shock absorber durability testing bench according to claim 2, characterized in that, The top wall of the testing platform is symmetrically slidably connected with semi-sealed boxes. Each semi-sealed box has a connecting pipe embedded and fixedly connected to its inner wall, and a temperature sensor is fixedly connected to its inner side wall.

4. The automotive shock absorber durability testing bench according to claim 1, characterized in that, A heat preservation box is fixed on the machine platform. Multiple heating resistance tubes are embedded in the inner wall of the heat preservation box. Multiple first one-way tubes and multiple 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 connected to one end of a connecting tube. The other end of the connecting tube is fixedly connected to the heat preservation box. The end of the second one-way tube away from the circulation box is fixedly connected to the other end of the heat preservation box.

5. The automotive shock absorber durability testing bench according to claim 3, characterized in that, An electromagnet is embedded in the side wall of the semi-sealed box, and the temperature sensor and the display screen are electrically connected.

6. The automotive shock absorber durability testing bench according to claim 2, characterized in that, A pressure sensor is fixedly installed at one end of the detection column, and the pressure sensor is electrically connected to the display screen.

7. The automotive shock absorber durability testing bench according to claim 1, characterized in that, The synchronous shaft is slidably connected inside the rectangular hole, and the first wedge block is slidably connected inside the groove.

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