A continuous performance detection device for shock absorber bumper block of vehicle

Abstract

The application belongs to the technical field of shock absorber bumper block performance detection, and particularly relates to a continuous shock absorber bumper block performance detection device for vehicles, which comprises a detection tool, wherein the detection tool comprises a tool frame, a driving motor, a gear, a toothed disc, a driving shaft, a reciprocating mechanism and a mechanical sensor; the reciprocating mechanism comprises a reciprocating block, a reciprocating sleeve, a reciprocating shaft and a spring; the driving motor is fixedly installed above the tool frame; the reciprocating sleeve is slidably connected to the tool frame, and a limit is arranged at the sliding connection position; the bottom of the reciprocating block is provided with a sliding hole, and the spring is arranged in the sliding hole; the reciprocating shaft is fixedly installed in the middle of the inner wall of the reciprocating sleeve and is inserted into the sliding hole; and the reciprocating block is integrally formed at the lower end of the driving shaft. The device solves the problems of low detection efficiency, low detection accuracy and high energy consumption in the detection process of the dynamic force performance of the shock absorber bumper block.

Description

Technical Field

[0001] This invention belongs to the technical field of shock absorber buffer block performance testing, specifically relating to a continuous vehicle shock absorber buffer block performance testing device. Background Technology

[0002] With the continuous development of the automotive industry, shock absorber blocks, as key vibration damping components, directly affect the comfort, handling stability, and safety of the entire vehicle. To ensure that shock absorber blocks maintain good dynamic mechanical performance during long-term service, there is an urgent need for a device capable of continuously, efficiently, and accurately testing their performance. However, existing dynamic mechanical performance testing equipment is mostly designed for general materials or specific structural components, making it difficult to meet the testing requirements of automotive shock absorber blocks under simulated real-world conditions, including continuous loading, high-frequency reciprocating compression, and simultaneous acquisition of multiple parameters.

[0003] A search revealed a patent for a dynamic mechanical property testing system with publication number CN221925971U, authorized on October 29, 2024. This patent simulates the bending deformation of the test piece in a real environment by using a rotating and bending component in conjunction. However, it lacks a continuous and automated testing process, making it difficult to achieve batch and continuous performance evaluation of multiple buffer block samples, resulting in low testing efficiency.

[0004] A search revealed a patent (CN114383939B) for a device, sample, and method for testing the dynamic mechanical properties of materials, with an authorization announcement date of December 6, 2024. This patent is based on electromagnetic forming technology, applying a high strain rate tensile load to the sample via electromagnetic force and combining high-speed imaging and strain acquisition for real-time measurement. While the device boasts high precision and high response speed, its loading mode is tensile rather than compressive, and it relies on a complex electromagnetic coil system and specialized sample structure, making it unsuitable for shock absorber blocks made of non-conductive polymer materials such as rubber or polyurethane. More importantly, the system cannot perform long-term, continuous cyclic compression tests and lacks the comprehensive ability to evaluate the dynamic stiffness, damping characteristics, and fatigue performance of the buffer block under various frequency and amplitude conditions.

[0005] The aforementioned problems indicate that existing dynamic mechanical performance testing devices are insufficient to meet the actual needs of automotive shock absorber buffer block performance testing in terms of loading modes, applicable materials, testing continuity, and operating condition simulation capabilities. Therefore, this invention provides a continuous automotive shock absorber buffer block performance testing device, aiming to achieve automated, high-precision testing of the buffer block's continuous, high-frequency, axial compression performance under simulated real vehicle operating conditions. This improves testing efficiency and data reliability, providing strong support for buffer block quality control and product development. Summary of the Invention

[0006] The purpose of this invention is to provide a continuous vehicle shock absorber buffer block performance testing device to solve the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a continuous vehicle shock absorber buffer block performance testing device, comprising a testing fixture, the testing fixture including a fixture frame, a drive motor, gears, a gear plate, a drive shaft, a reciprocating mechanism, and a force sensor; the reciprocating mechanism including a reciprocating block, a reciprocating sleeve, a reciprocating shaft, and a spring; the drive motor is fixedly mounted on the upper part of the fixture frame; the reciprocating sleeve is slidably connected to the fixture frame, and a limit switch is provided at the sliding connection; the bottom of the reciprocating block is provided with a sliding hole, and the spring is disposed in the sliding hole. The reciprocating shaft is fixedly installed in the middle of the inner wall of the reciprocating sleeve and inserted into the sliding hole. The reciprocating block is integrally formed on the lower end of the drive shaft. The gear is sleeved and fixed on the outer side of the drive shaft. The gear is fixedly connected to the output end of the drive motor and meshes with the gear. Limiting positions are provided between the upper and lower parts of the gear and the gear. Several sets of interconnected inclined grooves and connecting grooves are provided on the outer side of the reciprocating block. Rollers are rotatably connected to the inner wall of the reciprocating sleeve and are rolled in the inclined grooves and connecting grooves. The mechanical sensor is fixedly installed on the lower end of the reciprocating sleeve.

[0008] The present invention further explains that the mechanical sensor is used for dynamic compression characteristic detection. The mechanical sensor collects dynamic compression force and damping force. The drive motor drives the mechanical sensor to dynamically compress and vibrate the shock absorber buffer block through a reciprocating mechanism. Its operation steps include: Step S1, starting detection, the drive motor runs, the frequency and amplitude are set through the reciprocating mechanism, and the peak and valley values ​​of dynamic force and damping force are collected in real time through the mechanical sensor, and the dynamic stiffness at different frequencies is recorded; Step S2, saving the time of dynamic force and the displacement curve of dynamic force, and completing the detection of multiple samples.

[0009] The present invention further illustrates that the reciprocating block includes an upper block and a lower block. The lower surface of the upper block and the upper surface of the lower block are both provided with countersunk holes, and a snap-fit ​​shaft is connected inside the countersunk hole and fits against each other. A screw is rotatably connected to the upper end of the snap-fit ​​shaft. A hole is passed through the middle of the drive shaft and the upper block, and the screw is threaded into the hole. A nut is integrally formed at the upper end of the screw. The reciprocating block is divided into an upper block and a lower block through the middle position of the connecting groove.

[0010] The present invention further illustrates that the screw has a pressure hole and a pressing hole inside, the pressure hole and the pressing hole are interconnected, the upper end and the left and right sides of the snap-fit ​​shaft are provided with through holes, the upper and lower ends of the snap-fit ​​shaft are provided with limiters, the through holes are connected to the countersunk hole and the through holes are aligned with the pressing holes, forming a channel that passes through the countersunk hole, the through holes, the pressing holes and the pressure holes.

[0011] The present invention further illustrates that the upper end of the pressure hole is connected to an external hydraulic pump pipeline.

[0012] The present invention further explains that the pressure of the external hydraulic pump connected to the pressure port is adjusted according to the frequency of dynamic compression.

[0013] The present invention further explains that the operating modes of the external hydraulic pump connected to the pressure port include positive pressure and negative pressure, wherein positive pressure is for discharging liquid and negative pressure is for extracting liquid.

[0014] The present invention further illustrates that a sealing ring is provided below the threaded portion of the screw and at the rotatable connection with the snap-fit ​​shaft.

[0015] The present invention further illustrates that annular grooves are provided above the inner wall of the sliding hole at the lower end of the reciprocating block and at the upper end of the reciprocating shaft, and the upper and lower ends of the spring are respectively embedded in the two annular grooves.

[0016] The present invention further illustrates that grooves are provided on both sides of the upper and lower ends of the snap-fit ​​shaft, and protrusions are provided on the inner wall of the countersunk hole, and the protrusions and grooves are snapped together.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The method of detecting the dynamic force of the buffer block in the present invention accurately verifies the actual working condition load-bearing capacity of the buffer block, avoids failure under vehicle bumps and extreme road conditions after subsequent installation on automobiles, ensures driving safety, improves the smoothness and durability of the shock absorber, reduces abnormal noise and jerking problems, reduces the after-sales failure rate of the shock absorber buffer block, controls production costs, and the detected dynamic force has high accuracy. The automated detection can improve detection efficiency and achieve low energy consumption for the drive motor, which helps to reduce detection costs. The detection process has high continuity. As the drive motor rotates continuously, the dynamic force and damping force peak and valley values ​​are collected in real time through mechanical sensors, and multiple samples are continuously tested. When the load-bearing capacity of the buffer block needs to be adjusted under actual working conditions, the gap in the inclined groove is increased, making the roller roll more smoothly and increasing the frequency of dynamic force application during testing. This automatically adapts to the load-bearing capacity of the buffer block under different working conditions. At the same time, when the roller rolls in the inclined groove, the axial force increases, and the length of the connecting groove increases, which increases the strength of the spring when it deforms and returns to its original position. This increases the impact strength on the buffer block, further improving the load-bearing capacity of the buffer block. The testing effect and accuracy are further improved, and the overall structure is simple, allowing for mass production to significantly improve testing efficiency. Conversely, when it is necessary to reduce the frequency, the nut is turned in the opposite direction to increase the friction between the roller and the inner wall of the inclined groove, thereby slowing down the rotation speed and reducing the testing frequency. The operation is convenient. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the reciprocating mechanism of the present invention; Figure 3 This is a front sectional view of the reciprocating mechanism of the present invention; Figure 4 This is an exploded view of the reciprocating mechanism of the present invention; Figure 5 This is a schematic diagram showing the positional relationship between the roller and the inclined groove of the present invention; Figure 6 This is a side sectional view of the reciprocating mechanism of the present invention; Figure 7 This is an exploded side view of the reciprocating mechanism of the present invention; Figure 8 This is a plan view of the reciprocating mechanism of the present invention; In the diagram: 1. Tooling frame; 2. Gear; 3. Gear disc; 4. Drive shaft; 5. Force sensor; 6. Reciprocating sleeve; 61. Reciprocating shaft; 611. Annular groove; 62. Spring; 63. Inclined groove; 64. Connecting groove; 65. Roller; 66. Upper block; 67. Lower block; 68. Snap-fit ​​shaft; 69. Screw; 691. Pressure hole; 692. Pressing hole; 693. Countersunk hole. Detailed Implementation

[0019] The following detailed, non-limiting description of the technical solution of the present invention, in conjunction with preferred embodiments and accompanying drawings, is provided. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-8 The present invention provides a technical solution: a continuous vehicle shock absorber buffer block performance testing device, including a testing fixture, which includes a fixture frame 1, a drive motor, a gear 2, a gear disk 3, a drive shaft 4, a reciprocating mechanism, and a mechanical sensor 5. The reciprocating mechanism includes a reciprocating block, a reciprocating sleeve 6, a reciprocating shaft 61, and a spring 62. The drive motor is fixedly installed on the upper part of the tooling frame 1. The reciprocating sleeve 6 is slidably connected to the tooling frame 1, and a limit is provided at the sliding connection. A sliding hole is provided at the bottom of the reciprocating block, and the spring 62 is set in the sliding hole. The reciprocating shaft 61 is fixedly installed in the middle of the inner wall of the reciprocating sleeve 6 and inserted into the sliding hole. The reciprocating block is integrally formed on the lower end of the drive shaft 4. The gear 3 is sleeved and fixed on the outer side of the drive shaft 4. The gear 2 is fixedly connected to the output end of the drive motor and meshes with the gear 3. A limit is provided between the upper and lower parts of the gear 3 and the gear 2. Several sets of interconnected inclined grooves 63 and connecting grooves 64 are provided on the outer side of the reciprocating block. A roller 65 is rotatably connected to the inner wall of the reciprocating sleeve 6, and the roller 65 is tumblingly connected in the inclined grooves 63 and connecting grooves 64. The mechanical sensor 5 is fixedly installed at the lower end of the reciprocating sleeve 6.

[0021] The mechanical sensor 5 is used for dynamic compression characteristic detection. The mechanical sensor 5 collects dynamic compression force and damping force. The drive motor drives the mechanical sensor 5 to dynamically compress and vibrate the shock absorber buffer block through the reciprocating mechanism. Its operation steps include: Step S1, start detection, drive the motor to run, set the frequency and amplitude through the reciprocating mechanism, and collect the peak and valley values ​​of dynamic force and damping force in real time through the mechanical sensor 5, and record the dynamic stiffness at different frequencies; Step S2, save the time of dynamic force and the displacement curve of dynamic force, and complete the detection of multiple samples. Principle: The shock absorber buffer block is placed on the fixture 1 and contacts the bottom end of the force sensor 5. Then, the drive motor runs clockwise, and through the meshing of gear 2 and gear plate 3, it drives the drive shaft 4 to rotate. The drive shaft 4 drives the reciprocating block to rotate, and the reciprocating sleeve 6 is limited and cannot rotate, so that the roller 65 rolls in the connecting groove 64 and the inclined groove 63. When the roller 65 rolls in the inclined groove 63, the roller 65 contacts the lower surface of the inclined groove 63 and generates an axial force, which lifts the reciprocating sleeve 6 upward. The reciprocating sleeve 6 deforms by compressing the spring 62 through the reciprocating shaft 61. After the roller 65 rolls into the connecting groove 64, the axial force disappears and the spring 62 quickly returns to its original position, so that the reciprocating sleeve 6 quickly descends, causing the lower end of the force sensor 5 to rise and impact the shock absorber buffer block, thereby detecting the dynamic force on the buffer block. The speed of the drive motor is uniform and stable. Beneficial effects: This method detects the dynamic force of the buffer block, accurately verifies its actual working capacity, and prevents failure under vehicle bumps and extreme road conditions after installation, ensuring driving safety. It also improves the smoothness and durability of the shock absorber, reduces abnormal noise and jerking, lowers the after-sales failure rate of the shock absorber buffer block, controls production costs, and provides high accuracy in detecting dynamic force. The automated detection improves testing efficiency and reduces energy consumption for the drive motor, thus lowering testing costs. The testing process is highly continuous; as the drive motor rotates continuously, the mechanical sensor 5 collects the peak and valley values ​​of dynamic force and damping force in real time, continuously completing the testing of multiple samples.

[0022] The reciprocating block includes an upper block 66 and a lower block 67. The lower surface of the upper block 66 and the upper surface of the lower block 67 are both provided with countersunk holes 693, and a snap-fit ​​shaft 68 is connected inside the countersunk hole 693 and fits against each other. The upper end of the snap-fit ​​shaft 68 is rotatably connected to a screw 69. The drive shaft 4 and the middle of the upper block 66 have a through hole, and the screw 69 is threaded into the hole. The upper end of the screw 69 is integrally formed with a nut. The reciprocating block is divided into an upper block 66 and a lower block 67 by the middle position of the connecting slot 64; Principle: When it is necessary to adjust the load-bearing capacity of the buffer block under actual working conditions, the operator can turn the nut to make the screw 69 rotate. Through the thread transmission, the screw 69 moves downward and pushes the snap-fit ​​shaft 68 downward, which pushes the lower block 67 to move downward slightly, so that the lower block 67 is disengaged from the upper block 66. At this time, the connecting groove 64 is disconnected, the length of the connecting groove 64 changes, and the gap of the inclined groove 63 increases. Beneficial effects: The increased clearance in the inclined groove 63 allows the roller 65 to roll more smoothly, increasing the frequency of dynamic force application during testing. This automatically adapts to the load-bearing capacity of the buffer block under different working conditions. Simultaneously, the axial force increases as the roller 65 rolls within the inclined groove 63, and the increased length of the connecting groove 64 enhances the strength of the spring 62 upon deformation and reset, thereby increasing the impact strength on the buffer block. This further improves the load-bearing capacity of the buffer block, enhancing both the testing effect and accuracy. Furthermore, the overall structure is simple, allowing for mass production and significantly improving testing efficiency. Conversely, when a lower frequency is required, the nut is turned in the opposite direction to increase the friction between the roller 65 and the inner wall of the inclined groove 63, thus slowing down the rotation speed and reducing the testing frequency. Operation is convenient.

[0023] The screw 69 has a pressure hole 691 and a pressure hole 692 inside, which are connected to each other. The upper end and the left and right sides of the snap-fit ​​shaft 68 are provided with through holes. The upper and lower ends of the snap-fit ​​shaft 68 are provided with limiters. The through holes are connected to the inside of the countersunk hole 693, and the through holes are aligned with the pressure hole 692, forming a channel that runs through the countersunk hole 693, the through holes, the pressure holes 692 and the pressure hole 691.

[0024] The upper end of pressure port 691 is connected to an external hydraulic pump pipeline.

[0025] The pressure of the external hydraulic pump connected to pressure port 691 is adjusted according to the frequency of dynamic compression. Principle: During the testing process, if manual operation is not possible, the operator can also inject or extract liquid into the pressure hole 691 by driving an external hydraulic pump, so that the liquid enters the countersunk hole 693 through the pressure hole 692 and the through hole. The nut rotates a full number of revolutions. After the liquid enters the countersunk hole 693, the resistance at the upper end of the snap-fit ​​shaft 68 is controlled by hydraulic control. Beneficial effects: Automatic control allows the gap of the inclined groove 63 and the length of the connecting groove 64 to change automatically, thereby automatically adjusting the frequency and amplitude of the detected dynamic force. Furthermore, the axial force generated by the roller 65 rolling in the inclined groove 63 can be quickly reset by hydraulic pressure, preventing the roller 65 from getting stuck in the connecting groove 64 and further accelerating the detection efficiency. Frequency and amplitude adjustment is more convenient and faster. At the same time, the hydraulic force can stabilize the screw 69, preventing small deviations in the screw 69 during operation, which would affect the adjustment of frequency and amplitude.

[0026] The operating modes of the external hydraulic pump connected to pressure port 691 include positive pressure and negative pressure. Positive pressure is for discharging liquid, and negative pressure is for drawing liquid. When it is necessary to reduce the frequency and amplitude, the external hydraulic pump applies positive pressure, thereby applying an upward force to the upper end of the clamping shaft 68 to control the squeezing force and friction of the inclined groove 63 on the roller 65, slowing down the rotation speed and reducing the detection frequency and amplitude. Conversely, the external hydraulic pump applies negative pressure, and the automatic operation is more effective. When used in conjunction with manual operation, it can control the frequency and amplitude of the dynamic force of the detection buffer block to the greatest extent, and the detection accuracy is greatly improved.

[0027] A sealing ring is provided below the threaded portion of the screw 69 and at the rotatable connection with the snap-fit ​​shaft 68. By providing the sealing ring, liquid leakage is prevented and the hydraulic strength within the countersunk hole 693 is guaranteed.

[0028] Annular grooves 611 are provided on the upper part of the inner wall of the sliding hole at the lower end of the reciprocating block and at the upper end of the reciprocating shaft 61. The upper and lower ends of the spring 62 are respectively embedded in the two annular grooves 611. When the reciprocating block rotates, the upper and lower ends of the spring 62 can slide in the annular grooves 611 through the annular grooves 611, so as to reduce the wear of the spring 62 and improve the service life of the structure.

[0029] The upper and lower ends of the snap-fit ​​shaft 68 are both provided with grooves, and the inner wall of the countersunk hole 693 is provided with protrusions. The protrusions and grooves are interlocked to ensure that the lower block 67 can rotate synchronously when the upper block 66 rotates, and to prevent the detection from being interrupted due to the misalignment of the inclined groove 63 and the connecting groove 64.

[0030] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features, and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A continuous vehicle shock absorber buffer block performance testing device, comprising testing fixtures, characterized in that: The testing fixture includes a fixture frame (1), a drive motor, a gear (2), a gear disc (3), a drive shaft (4), a reciprocating mechanism, and a mechanical sensor (5). The reciprocating mechanism includes a reciprocating block, a reciprocating sleeve (6), a reciprocating shaft (61), and a spring (62). The drive motor is fixedly installed above the tooling frame (1). The reciprocating sleeve (6) is slidably connected to the tooling frame (1), and a limit is provided at the sliding connection. The bottom of the reciprocating block is provided with a sliding hole, and the spring (62) is located in the sliding hole. The reciprocating shaft (61) is fixedly installed in the middle of the inner wall of the reciprocating sleeve (6) and inserted into the sliding hole. The reciprocating block is integrally formed on the drive shaft (4). At the lower end, the gear disk (3) is sleeved and fixed to the outside of the drive shaft (4), the gear (2) is fixedly connected to the output end of the drive motor and meshes with the gear disk (3), and the upper and lower parts of the gear disk (3) are provided with limit positions between the gear (2), the outer side of the reciprocating block is provided with several sets of interconnected inclined grooves (63) and connecting grooves (64), the inner wall of the reciprocating sleeve (6) is rotatably connected with rollers (65), and the rollers (65) are rolled and connected in the inclined grooves (63) and connecting grooves (64); The mechanical sensor (5) is fixedly installed at the lower end of the reciprocating sleeve (6).

2. The continuous vehicle shock absorber buffer block performance testing device according to claim 1, characterized in that: The mechanical sensor (5) is used for dynamic compression characteristic detection. The mechanical sensor (5) collects dynamic compression force and damping force. The drive motor drives the mechanical sensor (5) to dynamically compress and vibrate the shock absorber buffer block through the reciprocating mechanism. Its operation steps include: Step S1, start detection, drive the motor to run, set the frequency and amplitude through the reciprocating mechanism, collect the peak and valley values ​​of dynamic force and damping force in real time through the mechanical sensor (5), and record the dynamic stiffness at different frequencies; Step S2, save the time of dynamic force and the displacement curve of dynamic force, and complete the detection of multiple samples.

3. The continuous vehicle shock absorber buffer block performance testing device according to claim 2, characterized in that: The reciprocating block includes an upper block (66) and a lower block (67). The lower surface of the upper block (66) and the upper surface of the lower block (67) are provided with countersunk holes (693), and a snap-fit ​​shaft (68) is connected inside the countersunk hole (693) and fits together. The upper end of the snap-fit ​​shaft (68) is rotatably connected to a screw (69). The drive shaft (4) and the upper block (66) have a through hole in the middle, and the screw (69) is threaded into the hole. The upper end of the screw (69) is integrally formed with a nut. The reciprocating block is divided into an upper block (66) and a lower block (67) through the middle position of the connecting groove (64).

4. The continuous vehicle shock absorber buffer block performance testing device according to claim 3, characterized in that: The screw (69) is provided with a pressure hole (691) and a pressure hole (692) inside. The pressure hole (691) and the pressure hole (692) are interconnected. The upper end and the left and right sides of the snap-fit ​​shaft (68) are provided with through holes. The upper and lower ends of the snap-fit ​​shaft (68) are provided with limiters. The through hole is connected to the countersunk hole (693) and the through hole is aligned with the pressure hole (692) to form a channel that passes through the countersunk hole (693), the through hole, the pressure hole (692) and the pressure hole (691).

5. The continuous vehicle shock absorber buffer block performance testing device according to claim 4, characterized in that: The upper end of the pressure hole (691) is connected to the external hydraulic pump pipeline.

6. The continuous vehicle shock absorber buffer block performance testing device according to claim 5, characterized in that: The pressure of the external hydraulic pump connected to the pressure port (691) is adjusted according to the frequency of dynamic compression.

7. The continuous vehicle shock absorber buffer block performance testing device according to claim 6, characterized in that: The operating modes of the external hydraulic pump connected to the pressure port (691) include positive pressure and negative pressure, where positive pressure is for discharging liquid and negative pressure is for extracting liquid.

8. The continuous vehicle shock absorber buffer block performance testing device according to claim 7, characterized in that: A sealing ring is provided below the threaded portion of the screw (69) and at the rotatable connection with the snap-fit ​​shaft (68).

9. The continuous vehicle shock absorber buffer block performance testing device according to claim 8, characterized in that: Annular grooves (611) are provided on the upper part of the inner wall of the sliding hole at the lower end of the reciprocating block and at the upper end of the reciprocating shaft (61). The upper and lower ends of the spring (62) are respectively embedded in the two annular grooves (611).

10. A continuous vehicle shock absorber buffer block performance testing device according to claim 9, characterized in that: The upper and lower ends of the snap-fit ​​shaft (68) are both provided with grooves, and the inner wall of the countersunk hole (693) is provided with protrusions, which are snapped together with the grooves.

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