A limit fixture for testing the shock absorption performance of a shock absorber

Abstract

The present invention discloses a limit tooling for shock absorption performance testing of a shock absorber, comprising a testing platform, a pushing base installed on the top of the pushing base, a clamping frame and a correction frame provided on the top of the pushing base, the clamping frame and the correction frame cooperate to correct and clamp the shock absorber, a sliding shaft is provided in an movable card inside the clamping frame, the sliding shaft can be adjusted according to the position offset of the hinged ring at the bottom of the shock absorber, a pair of limit vertical rods installed on the pushing base are inserted inside the correction frame, a transmission slider is provided for sliding on one side of the correction frame, an articulated frame is provided on one side of the transmission slider, adjustment plates are installed at both ends of the articulated frame, a clamping end plate is provided on the outer end of the adjustment plate, and a pushing block is provided at one end of the clamping end plate against the outside of the shock absorber; compared with the prior art, the present invention adopts the linkage design of the articulated frame, the arc-shaped pressure plate and the reset ring, and can also be combined with a pressure-sensitive sensor and a resistance sensing function, so as to monitor the offset state of the shock absorber in real time during the test.

Description

Technical Field

[0001] The invention relates to the technical field of shock absorber production, in particular to a position limiting tool for testing the shock absorption performance of a shock absorber. Background Art

[0002] As a core component of the vehicle suspension system, the performance of motorcycle shock absorbers directly affects driving safety, handling stability and riding comfort. Under extreme road conditions or high-load conditions, the compression / rebound stroke of the shock absorber can easily exceed the design threshold, resulting in abnormal wear of internal components (such as damping valves and seals) or even structural failure.

[0003] During the production process, it is necessary to conduct sampling inspections on shock absorbers in the same batch to reduce the unexpected occurrence of a large number of defective products. In traditional inspection methods, fixed mechanical limit blocks are usually used to physically constrain the shock absorber stroke. Existing mechanical limit devices are mostly designed with a single size and cannot be compatible with the outer diameter and stroke parameter differences of different models of shock absorbers. The fixture needs to be replaced frequently during inspection, which has low operating efficiency and is prone to positioning offset due to human errors. For this reason, we propose a limit fixture for shock absorber damping performance testing to solve the above problems. Summary of the Invention

[0004] The object of the present invention is to provide a limit fixture for testing the shock absorption performance of a shock absorber, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a limit fixture for testing the shock absorption performance of a shock absorber, comprising:

[0006] The testing platform has a push base installed on the top, and a clamping frame and a correction frame are provided on the top of the pushing base. The clamping frame and the correction frame cooperate to correct and clamp the shock absorber;

[0007] The cam is fixed on the upper end of the support frame, and the cam is fixed on the upper end of the support frame with a plurality of movable members, and the movable members can be adjusted according to the position offset of the hinge ring at the bottom of the shock absorber; a pair of limit vertical rods installed on the pushing base are inserted into the correction frame; a transmission slider is slidingly provided on one side of the correction frame, and an articulated frame is provided on one side of the transmission slider; adjustment plates are installed at both ends of the articulated frame; a clamping end plate is provided on the outer end of the adjustment plate, and a pushing block is provided at one end of the clamping end plate that rests on the outside of the shock absorber; when the shock absorber needs to be tested, it can be limited and clamped by means of the clamping frame and the correction frame, so that the shock absorber can be clamped on the test bench, and the subsequent limit top block can rest on the top of the shock absorber; as the pushing base runs, the shock absorber can be continuously compressed, and the performance of the shock absorber under different pressures can be observed from the side.

[0008] Preferably, the position of the clamping frame can be adjusted to control the clamping position of the shock absorber, and adjustable transmission blocks are installed at both ends of the sliding shaft, a rectangular frame is installed on the top of the transmission block, and a fixed disk is installed on the rectangular frame, and a clamping cone is rotatably provided at one end of the fixed disk, and the clamping cone is symmetrically arranged, which can clamp and limit the hinge ring at the bottom of the shock absorber.

[0009] Preferably, an annular groove for clamping a buffer washer is provided on the clamping cone, and a locking rod is inserted at the rear end of the fixed plate for clamping and limiting the clamping cone;

[0010] An arc-shaped groove is provided at the bottom of the sliding shaft, and a buffer pad is installed inside the arc-shaped groove for supporting the bottom of the shock absorber.

[0011] Preferably, a positioning rod is inserted on the sliding shaft, and a plurality of limit holes are provided at the bottom of the clamping frame. The positioning rod is clamped inside the limit hole for adjusting the position of the sliding shaft. A straight groove is provided at the rear end of the sliding shaft, and a positioning shaft is installed inside the straight groove. The positioning shaft is clamped between the limit vertical rods.

[0012] Preferably, a group of hinge shafts are installed on the surface of the transmission slider, and a telescopic end block is installed at the rear end of the articulated frame. The telescopic end block is clamped between the hinge shafts. A pair of slide grooves are opened on the articulated frame, and the adjustment plate can move inside the slide grooves for adjustment according to shock absorbers of different sizes.

[0013] Preferably, a rectangular groove is provided inside the adjustment plate, and the pushing block is movably clamped inside the rectangular groove. A plurality of limiting holes and a pair of clamping slots are provided on the top of the adjustment plate. A limiting plug is provided on the top of the adjustment plate, and a limiting hole is provided at the bottom of the limiting plug to rest on the top of the pushing block for positioning. A clamping frame movably provided inside the clamping slot is provided on the top of the limiting plug for limiting the limiting plug. The position of the adjustment plate can be adjusted according to the actual size of the shock absorber, and the plate has good applicability.

[0014] Preferably, a transmission rod is installed at the rear end of the pushing block, and an arc-shaped pressure plate is installed at the front end of the pushing block. Docking grooves are installed at both ends of the arc-shaped pressure plate, and a hollow tube with an open side wall is installed inside the docking groove. A clamping shaft is rotatably provided inside the hollow tube, and a reset ring with a plurality of rubber pads connected to the outer wall is movably provided on the surface of the clamping shaft. A through groove is provided on the side of the hollow tube corresponding to the docking groove.

[0015] Preferably, a transmission plate is provided on the inner wall of the arc-shaped pressure plate, both ends of the transmission plate are arc-shaped and can be compressed and deformed under the action of external force, both ends of the transmission plate are against the reset ring, a plurality of fixed clamping shafts are installed on the surface of the transmission plate, elastic sheets are installed at both ends of the fixed clamping shafts, and an adsorption plate is provided between the elastic sheets, the adsorption plate is composed of a nylon mesh and a sponge gasket, and is used to rest on the surface of the shock absorber piston connecting rod to assist in correcting the limit, and the sponge gasket in the adsorption plate is used to clean the surface of the piston connecting rod during the movement to reduce residual debris on the surface that may scratch the surface of the piston connecting rod and affect the test results.

[0016] Preferably, a plurality of lifting rods are installed on the detection platform, and a transmission platform is movably provided on the lifting rods, a transmission plate is provided at the bottom of the transmission platform, and a plurality of limiting top blocks are installed on the transmission plate, a reset hole is opened on the detection platform, and a pair of pushing shafts are installed at the bottom of the pushing base and are clamped in the reset hole, a buffer pad is installed on the detection platform, and the buffer pad is located directly below the pushing base to play a buffering role.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention adopts a linkage design of an articulated frame, an arc-shaped pressure plate, and a reset ring, and can also be combined with a pressure-sensitive sensor and resistance sensing function to monitor the shock absorber offset status in real time during the test process. The resistance change curve or digital display feedback can be used to intuitively determine whether the clamping is straight, effectively avoiding test data distortion caused by installation offset.

[0019] 2. The present invention utilizes an adjustable sliding shaft, transmission block, and a snap-fit ​​cone structure, combined with the sliding groove movement function of the adjustment plate, to enable the fixture to flexibly adapt to shock absorber hinge rings and piston connecting rods of different diameters and lengths, significantly reducing the frequency of specialized fixture replacement and improving the versatility of the test equipment.

[0020] 3. The present invention provides a buffer structure at key contact points such as the clamping cone annular groove and the reset ring rubber pad, which can reduce the mechanical wear on the surface of the hinge hole at the bottom of the shock absorber during the clamping process. In addition, the buffer pad can also disperse the test pressure during the clamping process and ensure the clamping stability.

[0021] 4. The present invention adopts a nylon mesh and sponge composite structure through the adsorption plate, combined with the friction cleaning effect of the reset ring on the piston connecting rod, which can automatically remove the oil and debris remaining during the test process, facilitate replacement, further simplify the daily maintenance process, and improve the sustainable operation efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2This is a schematic diagram of the transmission seat structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the push base of the present invention;

[0025] Figure 4 For the present invention Figure 3 A partial enlarged schematic diagram in the middle;

[0026] Figure 5 This is a schematic diagram of the top structure of the clamping frame of the present invention;

[0027] Figure 6 This is a structural diagram of one side of the correction frame of the present invention;

[0028] Figure 7 This is a schematic diagram of the structure of the clamping component of the present invention;

[0029] Figure 8 For the present invention Figure 7 A partial enlarged schematic diagram of point B in the middle;

[0030] In the figure: 1. Testing table; 2. Pushing base; 3. Clamping frame; 4. Correction frame; 5. Clamping end plate; 11. Transmission table; 12. Limiting top block; 21. Pushing shaft; 31. Sliding shaft; 311. Positioning plug rod; 32. Transmission block; 33. Fixed plate; 34. Snap-fit ​​cone; 35. Positioning shaft; 41. Limiting vertical rod; 42. Articulated frame; 421. Transmission slider; 43. Telescopic end block; 44. Adjustment plate; 45. Limiting plug block; 51. Pushing block; 511. Transmission plug rod; 52. Arc pressure plate; 53. Hollow tube; 54. Snap-fit ​​shaft; 541. Reset ring; 55. Transmission plate; 551. Fixed clamping shaft; 56. Adsorption plate. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] See also Figures 1-8 The present invention provides a technical solution: a limit fixture for testing the shock absorption performance of a shock absorber, comprising:

[0033] The testing platform 1 has a driving base 2 installed on its top. The driving base 2 has a clamping frame 3 and a correction frame 4 on its top. The clamping frame 3 and the correction frame 4 cooperate to correct and clamp the shock absorber.

[0034] Among them, the clamping frame 3 is movablely provided with a sliding shaft 31 inside, and the sliding shaft 31 can be adjusted according to the position offset of the hinge ring at the bottom of the shock absorber. A pair of limiting vertical rods 41 installed on the pushing base 2 are inserted inside the correction frame 4, and a transmission slider 421 is slidingly provided on one side of the correction frame 4, and a hinge frame 42 is provided on one side of the transmission slider 421. Adjustment plates 44 are installed at both ends of the hinge frame 42, and a clamping end plate 5 is provided at the outer end of the adjustment plate 44. A pushing block 51 is provided at one end of the clamping end plate 5 that rests on the outside of the shock absorber. When the shock absorber needs to be tested, it can be limited and clamped by means of the clamping frame 3 and the correction frame 4, so that the shock absorber can be clamped on the test bench 1, and the subsequent limiting top block 12 can rest on the top of the shock absorber. As the pushing base 2 runs, the shock absorber can be continuously compressed, and the performance of the shock absorber under different pressures can be observed from the side.

[0035] like Figure 3 and Figure 4 As shown, in order to limit the shock absorbers of different sizes, the position of the clamping frame 3 can be adjusted to control the clamping position of the shock absorber. Adjustable transmission blocks 32 are installed at both ends of the sliding shaft 31, and a rectangular frame is installed on the top of the transmission block 32, and a fixed plate 33 is installed on the rectangular frame. A clamping cone 34 is rotatably provided at one end of the fixed plate 33. The clamping cone 34 is symmetrically arranged, and the position of the transmission block 32 can be adjusted. The hinged ring at the bottom of the shock absorber is clamped inside the clamping cone 34, which can play a limiting role.

[0036] like Figure 4 As shown, in order to ensure the stability of the clamping limit of the device, an annular groove for clamping the buffer washer is opened on the clamping cone 34, and a locking rod is inserted into the rear end of the fixed plate 33 to clamp and limit the clamping cone 34. During the clamping process, it can be clamped in the hinge ring at the bottom of the shock absorber with the cooperation of the buffer washer, reducing the wear during the clamping process and further ensuring the stability of the clamping.

[0037] An arc-shaped groove is provided at the bottom of the sliding shaft 31 , and a buffer plate is installed inside the arc-shaped groove for supporting the bottom of the shock absorber. The bottom of the shock absorber can rest on the buffer plate to play an auxiliary supporting role.

[0038] In order to facilitate the subsequent detection of whether the shock absorber clamping is offset, a positioning rod 311 is inserted on the sliding shaft 31, and a plurality of limit holes are provided at the bottom of the clamping frame 3. The positioning rod 311 is clamped inside the limit hole for adjusting the position of the sliding shaft 31. A straight groove is provided at the rear end of the sliding shaft 31, and a positioning shaft 35 is installed inside the straight groove. The positioning shaft 35 is clamped between the limit vertical rods 41. The operator can push and pull the sliding shaft 31 to move, which can drive the shock absorber as a whole to tilt. At this time, the angle of the telescopic end block 43 and the articulated frame 42 can be changed. With the resistance feedback generated during the transmission process of the arc pressure plate 52, the operator can know whether the shock absorber is in a straightened state.

[0039] like Figure 5 and Figure 6 As shown, in order to adapt to shock absorbers of different sizes and reduce the frequency of replacing clamping accessories, a group of hinged shafts are installed on the surface of the transmission slider 421, and a telescopic end block 43 is installed at the rear end of the hinge frame 42. The telescopic end block 43 is clamped between the hinged shafts, and a pair of slide grooves are opened on the hinge frame 42. The adjustment plate 44 can move inside the slide grooves and is used to adjust according to shock absorbers of different sizes. The position of the adjustment plate 44 can be adjusted according to actual conditions, and the push block 51 can be pressed against the outer wall of the shock absorber to play an auxiliary support role.

[0040] like Figure 6 As shown, in order to ensure the limiting effect of the equipment, a rectangular groove is provided inside the adjusting plate 44, and the pushing block 51 is movably clamped inside the rectangular groove. A plurality of limiting holes and a pair of card slots are provided on the top of the adjusting plate 44, and a limiting plug 45 is provided on the top of the adjusting plate 44. The bottom of the limiting plug 45 is provided with a through limiting hole that is pressed against the top of the pushing block 51 for positioning. The top of the limiting plug 45 is provided with a clamping frame movably set inside the card slot for limiting the limiting plug 45. When it is confirmed that the shock absorber is clamped, straightened and stable, the inward extrusion of the adjusting plate 44 can be adjusted, and the pushing block 51 can be pressed against both ends of the shock absorber to further enhance the clamping force, which can play an anti-drift role in the subsequent pressure test of the shock absorber.

[0041] like Figure 7 and Figure 8As shown, in order to reduce the offset during the clamping process, a transmission plug rod 511 is installed at the rear end of the pushing block 51, and an arc-shaped pressure plate 52 is installed at the front end of the pushing block 51. Docking grooves are installed at both ends of the arc-shaped pressure plate 52, and a hollow tube 53 with an open side wall is installed inside the docking groove. A clamping shaft 54 ​​is rotatably provided inside the hollow tube 53, and a reset ring 541 with a plurality of rubber pads connected to the outer wall is movably provided on the surface of the clamping shaft 54. A through groove is provided on the side of the hollow tube 53 corresponding to the docking groove. The angles of the telescopic end block 43 and the articulated frame 42 can be changed, so that the arc-shaped pressure plate 52 clamped on the surface of the piston connecting rod can slide along the surface of the piston connecting rod during the tilting process. During movement, when there is no problem with the shock absorber correction, the resistance generated during the sliding process is small, and the shock absorber can be tilted smoothly. When the shock absorber hinge ring is offset during the clamping process, the arc-shaped pressure plate 52 receives gradually increasing resistance as the tilt angle increases. Compared with direct observation with the naked eye, feeling the transmitted resistance can more intuitively detect whether there is a problem with the shock absorber clamping, and reduce the impact of subsequent shock absorber offset on the performance test results. In order to monitor more intuitively, a pressure-sensitive sensor and a digital display screen can be set inside the arc-shaped pressure plate 52, which can detect whether there is an unexpected offset based on the pressure change curve, and provide more intuitive feedback.

[0042] like Figure 8 As shown, a transmission plate 55 is provided on the inner wall of the arc pressure plate 52. Both ends of the transmission plate 55 are arc-shaped and can be compressed and deformed under the action of external force. Both ends of the transmission plate 55 are against the reset ring 541. A plurality of fixed card shafts 551 are installed on the surface of the transmission plate 55. Elastic sheets are installed at both ends of the fixed card shaft 551, and an adsorption plate 56 is provided between the elastic sheets. During the transmission process of the arc pressure plate 52, the reset ring 541 can continuously rub against the surface of the piston connecting rod and can squeeze the two ends of the transmission plate 55 with the rubber pads on the surface of the reset ring 541, so that the transmission plate 55 is compressed and drives the adsorption plate 56 to fit the surface of the piston connecting rod for cleaning, thereby reducing the adhesion and residue of oil and debris on the surface of the piston connecting rod. The adsorption plate 56 is composed of nylon mesh and sponge gasket, which is used to rest on the surface of the shock absorber piston connecting rod to assist in correcting the limit. The sponge plate can absorb excess oil on the surface of the piston connecting rod. In the monitoring process, the cleaning of lubricating oil leakage due to unexpected circumstances can be blocked with the help of the sponge plate, thereby reducing the time required for cleaning and maintenance.

[0043] like Figure 1 and Figure 2As shown, a plurality of lifting rods are installed on the testing platform 1, and a transmission platform 11 is movable on the lifting rod, a transmission plate is provided at the bottom of the transmission platform 11, and a plurality of limiting top blocks 12 are installed on the transmission plate, which can be against the top of the shock absorber for auxiliary limiting. A reset hole is opened on the testing platform 1, and a pair of pushing shafts 21 are installed at the bottom of the pushing base 2 and are clamped in the reset hole. A buffer pad is installed on the testing platform 1, and the buffer pad is located directly below the pushing base 2. Combined with the buffer pad, the vibration generated during the transmission of the pushing base 2 can be reduced.

[0044] Working principle: First, when the shock absorber needs to be tested, it can be limited and clamped with the help of the clamping frame 3 and the correction frame 4, so that the shock absorber can be clamped on the test platform 1, and the subsequent limiting top block 12 can be against the top of the shock absorber. As the base 2 is pushed to operate, the shock absorber can be continuously compressed, and the performance of the shock absorber under different pressures can be observed from the side. When limiting, the piston connecting rod at the bottom of the shock absorber is inserted into the inside of the correction frame 4, and the hinge ring at the bottom can be clamped between the clamping cones 34, which can limit the bottom of the shock absorber. As the piston connecting rod at the bottom of the shock absorber can be clamped between the arc-shaped pressure plates 52, it can play a role in auxiliary positioning, reducing the occurrence of offset during the clamping process;

[0045] Then, the position of the pushing block 51 is adjusted according to the size of the shock absorber, so that the arc-shaped pressure plate 52 can be fitted on the surface of the piston connecting rod. At this time, the operator can push and pull the sliding shaft 31 to move, which can drive the shock absorber as a whole to tilt. At this time, the angle of the telescopic end block 43 and the hinge frame 42 can be changed, so that the arc-shaped pressure plate 52 clamped on the surface of the piston connecting rod can slide along the surface of the piston connecting rod during the tilting process. During the sliding process, when there is no problem in correcting the shock absorber, the resistance generated during the sliding process is small, and the tilting of the shock absorber can be completed smoothly. When the shock absorber articulated ring is deviated during the clamping process, the shock absorber can be tilted. When the arc pressure plate 52 is shifted, the resistance it receives gradually increases as the tilt angle increases. Compared with direct observation with the naked eye, feeling the transmitted resistance can more intuitively detect whether there is a problem with the shock absorber clamping, reducing the impact of subsequent shock absorber offset on the results of the performance test. In addition, during the transmission process of the arc pressure plate 52, the reset ring 541 can continuously rub against the surface of the piston connecting rod, and can squeeze the two ends of the transmission plate 55 together with the rubber pad on the surface of the reset ring 541, so that the transmission plate 55 is compressed and drives the adsorption plate 56 to fit the surface of the piston connecting rod for cleaning, thereby reducing the adhesion of oil and debris on the surface of the piston connecting rod.

[0046] Finally, when it is confirmed that the shock absorber is clamped without deviation, the sliding shaft 31 can be reset, and the locking rod can be pushed into the inside of the clamping cone 34 to play a limiting role. The transmission platform 11 moves, and the top limiting top block 12 can be pressed against the top of the shock absorber, which is convenient for subsequently pushing the base 2 to move and test the various performances of the shock absorber.

[0047] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A limit fixture for testing the damping performance of a shock absorber, characterized by: include, A testing platform (1) is provided with a pushing base (2) on the top thereof, a clamping frame (3) and a correction frame (4) are provided on the top of the pushing base (2), and the clamping frame (3) and the correction frame (4) cooperate to correct and clamp the shock absorber; The clamping frame (3) is provided with a sliding shaft (31) in an internal movable card, and the sliding shaft (31) can be adjusted according to the position offset of the hinge ring at the bottom of the shock absorber. A pair of limiting vertical rods (41) installed on the pushing base (2) are inserted into the correction frame (4). A transmission slider (421) is provided on one side of the correction frame (4). A hinge frame (42) is provided on one side of the transmission slider (421). Adjustment plates (44) are installed at both ends of the hinge frame (42). A clamping end plate (5) is provided on the outer end of the adjustment plate (44). A push block (51) is provided at one end of the clamping end plate (5) against the outside of the shock absorber. The rear end of the push block (51) is provided with a transmission plug rod (511), the front end of the push block (51) is provided with an arc-shaped pressure plate (52), a pressure-sensitive sensor and a digital display screen are provided inside the arc-shaped pressure plate (52), and an unexpected situation of deviation can be detected according to the curve of pressure change, docking grooves are provided at both ends of the arc-shaped pressure plate (52), and a hollow tube (53) with an open side wall is provided inside the docking groove, a clamping shaft (54) is provided inside the hollow tube (53) for rotation, and a reset ring (541) with a plurality of rubber pads connected to the outer wall of the clamping shaft (54) is provided on the surface of the clamping shaft (54), and a through groove is provided on the side of the hollow tube (53) corresponding to the docking groove; A transmission plate (55) is clamped on the inner wall of the arc-shaped pressure plate (52), and both ends of the transmission plate (55) are arc-shaped and can be compressed and deformed under the action of an external force. Both ends of the transmission plate (55) are against the reset ring (541), and a plurality of fixed card shafts (551) are installed on the surface of the transmission plate (55). Elastic sheets are installed at both ends of the fixed card shaft (551), and an adsorption plate (56) is clamped between the elastic sheets. The adsorption plate (56) is composed of a nylon mesh and a sponge gasket, and is used to abut against the surface of the shock absorber piston connecting rod to assist in correcting the limit.

2. The position limiting fixture for shock absorber damping performance testing according to claim 1, characterized in that: The position of the clamping frame (3) can be adjusted to control the clamping position of the shock absorber. Adjustable transmission blocks (32) are installed at both ends of the sliding shaft (31). A rectangular frame is installed on the top of the transmission block (32), and a fixed disk (33) is installed on the rectangular frame. One end of the fixed disk (33) is rotatably provided with a clamping cone (34), and the clamping cone (34) is symmetrically arranged.

3. The position limiting fixture for shock absorber damping performance testing according to claim 2, characterized in that: An annular groove for clamping a buffer washer is provided on the clamping cone (34), and a locking rod is inserted into the rear end of the fixed disk (33) for clamping and limiting the clamping cone (34); An arc-shaped groove is provided at the bottom of the sliding shaft (31), and a buffer pad is installed inside the arc-shaped groove for supporting the bottom of the shock absorber.

4. The position limiting fixture for shock absorber damping performance testing according to claim 1, characterized in that: A positioning rod (311) is inserted into the sliding shaft (31), and a plurality of limiting holes are provided at the bottom of the clamping frame (3). The positioning rod (311) is clamped inside the limiting holes for adjusting the position of the sliding shaft (31). A straight groove is provided at the rear end of the sliding shaft (31), and a positioning shaft (35) is installed inside the straight groove. The positioning shaft (35) is clamped between the limiting vertical rods (41).

5. The position limiting fixture for shock absorber damping performance testing according to claim 1, characterized in that: A set of hinge shafts are installed on the surface of the transmission slider (421), and a telescopic end block (43) is installed at the rear end of the hinge frame (42). The telescopic end block (43) is clamped between the hinge shafts. A pair of slide grooves are opened on the hinge frame (42), and the adjustment plate (44) can move inside the slide grooves to be adjusted according to shock absorbers of different sizes.

6. The position limiting fixture for shock absorber damping performance testing according to claim 1, characterized in that: A rectangular groove is provided inside the adjusting plate (44), and the pushing block (51) is movably clamped inside the rectangular groove. A plurality of limiting holes and a pair of clamping slots are provided on the top of the adjusting plate (44). A limiting plug (45) is provided on the top of the adjusting plate (44). The bottom of the limiting plug (45) is provided with a through limiting hole that abuts against the top of the pushing block (51) for positioning. A clamping frame movably provided inside the clamping slot is provided on the top of the limiting plug (45) for limiting the limiting plug (45).

7. The position limiting fixture for shock absorber damping performance testing according to claim 1, characterized in that: The detection platform (1) is provided with a plurality of lifting rods, and a transmission platform (11) is movable on the lifting rods. A transmission plate is provided at the bottom of the transmission platform (11), and a plurality of limit top blocks (12) are installed on the transmission plate. A reset hole is provided on the detection platform (1), and a pair of driving shafts (21) are installed at the bottom of the pushing base (2) and are clamped in the reset hole. A buffer pad is installed on the detection platform (1), and the buffer pad is located directly below the pushing base (2).

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