An automatic testing machine for dynamic balance of shock absorber

Abstract

The invention relates to an automatic detection machine for dynamic balance of seismic resistance of a shock absorber, which belongs to shock absorber detection equipment and comprises a detection frame, an upper lifting and fixing frame system, a lower power system and a random stroke selection system. The random stroke selection system is installed on the lower side of the upper lifting and fixing frame system, the upper lifting and fixing frame system is installed on the detection frame, the random stroke selection system is installed with an upper mounting rod, the lower power system is installed with a lower mounting rod, the random stroke selection system comprises an upper selection mounting frame, an ascending selection device and a descending selection device, both of which are installed on the upper selection mounting frame, the lower end of the upper lifting and fixing frame system is provided with a vertically arranged long hole, the height of the upper top end of the ascending selection device changes periodically, the ascending selection device stops moving after pressing the long hole, the height of the lower top end of the descending selection device changes periodically, the descending selection device stops moving after pressing the long hole, and the irregular undulation of a rugged road surface can be simulated and tested.

Description

Technical Field

[0001] The present invention relates to the technical field of shock absorber detection, and particularly to an automatic dynamic balance detection machine for the earthquake resistance of shock absorbers. Background Art

[0002] As an important part of the vehicle suspension system, the main function of the shock absorber is to absorb the vibration caused by road unevenness and improve the ride smoothness and comfort of the vehicle. The shock performance detection of the shock absorber is a necessary step before the shock absorber leaves the factory.

[0003] The methods and steps for shock absorber detection generally include: visual inspection: checking whether the shock absorber has leakage, deformation or other obvious external damage. Most external problems can be found through visual inspection; functional test: using professional equipment to perform compression and stretching tests on the shock absorber, measuring its damping characteristics, using a special test bench to perform dynamic tests on the shock absorber, simulating the vibration it receives during vehicle driving, and measuring the damping force curve at different compression and rebound speeds; road test: performing road tests under safe conditions to feel the stability and comfort of the vehicle under different road conditions; dynamic test: checking the reaction of the shock absorber by pressing the vehicle body or performing emergency braking to determine whether it is working properly; disassembly inspection: disassembling the shock absorber to perform compression and stretching tests, checking whether there is a stable resistance difference, and determining whether there is lack of oil or valve component damage.

[0004] When the existing special test bench detects the shock absorber, it is difficult to quickly adjust the degree of shock absorber rebound and extrusion, and cannot adapt to the simulation of irregular undulations of uneven roads. Summary of the Invention

[0005] To overcome the technical defects existing in the prior art, the present invention provides an automatic dynamic balance detection machine for the earthquake resistance of shock absorbers, which can simulate and test the irregular undulations of rough roads.

[0006] The technical solution adopted by the present invention is:

[0007] An automatic detection machine for the dynamic balance of the seismic resistance of a shock absorber, comprising a detection frame, an upper lifting and fixing frame system, a lower power system, and a random stroke selection system. The random stroke selection system is installed on the lower side of the upper lifting and fixing frame system. The upper lifting and fixing frame system is installed on the detection frame. The lower power system is installed on the detection frame. The random stroke selection system is provided with an upper mounting rod, and the lower power system is provided with a lower mounting rod. The random stroke selection system includes an upper selection mounting frame, an upward selection device, and a downward selection device. The upward selection device and the downward selection device are rotatably installed on the upper selection mounting frame. The lower ends of the upper lifting and fixing frame system are each provided with a vertically arranged long hole. The height of the upper top end of the upward selection device changes periodically. The upward selection device stops operating after pressing on the long hole. The height of the lower top end of the downward selection device changes periodically. The downward selection device stops operating after pressing on the long hole.

[0008] Preferably, a lifting slideway is provided on the detection frame, a lifting power groove is provided on the detection frame, the lifting power groove is communicated with the lifting slideway, the lower power system moves up and down along the lifting slideway, and the lower power system is installed in the lifting power groove.

[0009] Preferably, the upper lifting and fixing frame system includes a lifting frame, a lifting cross bar, and a lifting fixing member. The lifting cross bar is slidably installed on the lifting frame. The lifting frame is installed on the detection frame. The lifting cross bar is installed on the lifting frame through a lifting fixing rod.

[0010] Preferably, the lower power system includes a lower traction rod, a lower connecting rod, and a lower motor. The lower traction rod moves up and down along the detection frame. The lower motor is installed on the detection frame. One point of the lower connecting rod is rotatably installed on the lower traction rod. The lower connecting rod is rotatably installed at an eccentric position of the output end of the lower motor.

[0011] Preferably, the upward selection device includes an upward selection motor. An upward selection gear is eccentrically installed at the output end of the upward selection motor. An upper rack meshing with the upward selection gear is provided at the top of the long hole.

[0012] Preferably, the downward selection device includes a downward selection motor. A downward selection gear is eccentrically installed at the output end of the downward selection motor. A lower rack meshing with the downward selection gear is provided at the bottom of the long hole.

[0013] Preferably, a strain gauge is installed on the upper lifting and fixing frame system.

[0014] The beneficial effects of the present invention are:

[0015] The random stroke selection system is installed on the lower side of the up-and-down fixing frame system, and the up-and-down fixing frame system is installed on the detection frame. The up-and-down fixing frame system can adjust the installation height on the detection frame according to the different requirements of shock absorber models. The lower power system is installed on the detection frame. The random stroke selection system is equipped with an upper mounting rod, and the lower power system is equipped with a lower mounting rod. Both ends of the shock absorber to be detected are installed on this automatic detection machine through the upper mounting rod and the lower mounting rod respectively. The random stroke selection system includes an upper selection mounting frame, an ascending selection device and a descending selection device. The ascending selection device and the descending selection device are rotatably installed on the upper selection mounting frame. The lower ends of the up-and-down fixing frame system all have vertically arranged long holes. The height of the upper top end of the ascending selection device changes periodically. After the ascending selection device presses on the long hole, it stops moving to ensure stable traction. The height of the lower top end of the descending selection device changes periodically. After the descending selection device presses on the long hole, it stops moving to ensure stable pushing. Due to the different periods of the periodic changes of the ascending selection device and the descending selection device and the lifting movement period of the lower power system, the effect of randomly changing the traction and pushing strokes is produced. Brief Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of the present invention.

[0017] Figure 2 It is a schematic diagram of the installation positions of the upper selection motor and the lower selection motor.

[0018] Figure 3 It is a schematic structural diagram of the ascending selection device.

[0019] Figure 4 For Figure 1 The enlarged schematic diagram at position A in

[0020] Figure 5 For Figure 2 The enlarged schematic diagram at position B in

[0021] Figure 6 It is a schematic cross-sectional view of the principles of the ascending selection device and the descending selection device.

[0022] Explanation of the Reference Numerals in the Drawings:

[0023] 1. Detection frame; 11. Lifting slideway; 12. Lifting power groove;

[0024] 2. Up-and-down fixing frame system; 21. Long hole; 22. Lifting frame; 23. Lifting cross bar;

[0025] 3. Lower power system; 31. Lower traction rod; 32. Lower connecting rod; 33. Lower motor;

[0026] 4. Random stroke selection system; 41. Upper selection mounting bracket; 411. Guide slider; 42. Ascending selection device; 421. Upper selection motor; 422. Upper selection gear; 423. Upper friction plate; 43. Descending selection device; 431. Lower selection motor; 432. Lower selection gear; 433. Lower friction plate;

[0027] 5. Upper mounting rod;

[0028] 6. Lower mounting rod. Specific implementation manner

[0029] The present invention will be further described below with reference to the accompanying drawings:

[0030] As Figure 1 — Figure 6 shown, this embodiment provides a shock absorber anti-seismic dynamic balance automatic detector, including a detection frame 1, an ascending and descending fixed frame system 2, a lower power system 3 and a random stroke selection system 4. The random stroke selection system 4 is installed on the lower side of the ascending and descending fixed frame system 2, the ascending and descending fixed frame system 2 is installed on the detection frame 1, and the ascending and descending fixed frame system 2 can adjust the installation height on the detection frame 1 according to the needs of different shock absorber models. The lower power system 3 is installed on the detection frame 1. The random stroke selection system 4 is installed with an upper mounting rod 5, and the lower power system 3 is installed with a lower mounting rod 6. Both ends of the shock absorber to be detected are installed on this automatic detector through the upper mounting rod 5 and the lower mounting rod 6 respectively. The random stroke selection system 4 includes an upper selection mounting bracket 41, an ascending selection device 42 and a descending selection device 43. The ascending selection device 42 and the descending selection device 43 are rotatably installed on the upper selection mounting bracket 41. The lower ends of the ascending and descending fixed frame system 2 all have vertically arranged long holes 21. The height of the upper end of the ascending selection device 42 changes periodically. After the ascending selection device 42 presses on the long hole 21, it stops moving to ensure stable pulling. The height of the lower end of the descending selection device 43 changes periodically. After the descending selection device 43 presses on the long hole 21, it stops moving to ensure stable pushing. Due to the different periods of the periodic changes of the ascending selection device 42 and the descending selection device 43 and the period of the lifting movement of the lower power system 3, the effect of randomly changing the pulling and pushing strokes is produced.

[0031] Specifically, a lifting slideway 11 is provided on the detection frame 1, a lifting power groove 12 is provided on the detection frame 1, the lifting power groove 12 is communicated with the lifting slideway 11, and the lower power system 3 ascends and descends along the lifting slideway 11, thereby pulling the shock absorber to ascend and descend. The lower power system 3 is installed in the lifting power groove 12, and the lifting power groove 12 provides an installation space for the pulling action of the lower power system 3.

[0032] Specifically, the lifting and fixing frame system 2 includes a lifting frame 22, a lifting cross bar 23 and a lifting fixing member. The lifting cross bar 23 is slidably installed on the lifting frame 22. The lifting frame 22 is installed on the detection frame 1. The lifting cross bar 23 is installed on the lifting frame 22 through the lifting fixing member, so as to adjust the height of the lifting cross bar 23 to adapt to different shock absorbers. Specifically, the lifting fixing member is a screw. When it is necessary to fix the lifting cross bar 23 on the lifting frame 22, tighten the screw so that the screw abuts against the lifting frame 22, thereby adjusting the height of the lifting cross bar 23.

[0033] To ensure the stable operation of the ascending selection device 42 and the descending selection device 43, the upper selection mounting frame 41 is installed with a guiding slider 411 that slides along the long hole 21. When the lower power system 3 pulls the shock absorber to move up and down, the ascending selection device 42 and the descending selection device 43 intermittently press on the upper end and the lower end of the long hole 21. Due to the periodic change in the height of the upper top end of the ascending selection device 42 and the periodic change in the height of the lower top end of the descending selection device 43, the stroke of the elongation and retraction of the shock absorber is random.

[0034] Specifically, the lower power system 3 includes a lower traction rod 31, a lower connecting rod 32 and a lower motor 33. The lower traction rod 31 moves up and down along the detection frame 1. The lower motor 33 is installed on the detection frame 1. One end of the lower connecting rod 32 is rotatably installed on the lower traction rod 31, and the lower connecting rod 32 is rotatably installed at an eccentric position of the output end of the lower motor 33. The action of the lower motor 33 drives the lower traction rod 31 to move up and down, thereby driving the shock absorber to act.

[0035] The most important function of the present invention is to randomly change the compression and elongation strokes of the shock absorber, and the randomness of the stroke depends on the ascending selection device 42 and the descending selection device 43 to achieve.

[0036] Specifically, the ascending selection device 42 includes an upper selection motor 421. An upper selection gear 422 is eccentrically installed at the output end of the upper selection motor 421. For the specific installation method, please refer to the following text. An upper rack engaged with the upper selection gear 422 is provided at the top of the long hole 21. The upper selection gear 422 stops after contacting the long hole 21 due to the meshing effect with the long hole 21, ensuring stable transmission.

[0037] Specifically, the descending selection device 43 includes a lower selection motor 431. A lower selection gear 432 is eccentrically installed at the output end of the lower selection motor 431. For the specific installation method, please refer to the following text. A lower rack engaged with the lower selection gear 432 is provided at the bottom of the long hole 21. The lower selection gear 432 stops after contacting the long hole 21 due to the meshing effect with the long hole 21, ensuring stable transmission.

[0038] Specifically, both the upper and lower ends of the long hole 21 are rack profiles, preventing the upper selection gear 422 and the lower selection gear 432 from continuing to rotate after pressing against the upper and lower ends of the long hole 21.

[0039] Since the upper selection gear 422 and the lower selection gear 432 need to intermittently engage with the upper and lower ends of the long hole 21, to prevent damage to the upper selection motor 421 and the lower selection motor 431, an upper friction plate 423 is slidably mounted on the upper selection gear 422. The upper selection gear 422 and the upper friction plate 423 are circumferentially fixed. An upper compression spring is installed between the upper friction plate 423 and the upper selection gear 422. The upper compression spring pushes the upper friction plate 423 to friction with the output end of the upper selection motor 421, thereby realizing the transmission between the upper selection motor 421 and the upper selection gear 422. A lower friction plate 433 is slidably mounted on the lower selection gear 432. The lower selection gear 432 and the lower friction plate 433 are circumferentially fixed. A lower compression spring is installed between the lower friction plate 433 and the lower selection gear 432. The lower compression spring pushes the lower friction plate 433 to friction with the output end of the lower selection motor 431, thereby realizing the transmission between the lower selection motor 431 and the lower selection gear 432. Since the friction coefficient between the lower friction plate 433 and the lower selection motor 431, and the friction coefficient between the upper friction plate 423 and the upper selection gear 422 cannot be equal, and these two friction coefficients change in real time with their own temperature and environment, when the upper selection motor 421 and the lower selection gear 432 are not engaged with the long hole 21, the number of rotations is random, which makes the meshing timing between the upper selection gear 422, the lower selection gear 432 and the long hole 21 random, and then randomly changes the compression and elongation strokes of the shock absorber, making the test more realistic.

[0040] It should be noted that since the acceleration time and acceleration torque of the upper selection motor 421 and the lower selection motor 431 on the upper selection gear 422 and the lower selection gear 432 are limited, the impact between the upper selection gear 422, the lower selection gear 432 and the long hole 21 can be ignored, enabling the device to operate reliably for a long time.

[0041] Specifically, strain gauges are installed on the upper and lower fixing frame system 2 to record the changes in tension and pressure. This is prior art and will not be elaborated here.

[0042] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic testing machine for dynamic balance of shock absorber, characterized in that: The invention comprises a detection frame, an upper lifting and fixing frame system, a lower power system and a random stroke selection system, wherein the random stroke selection system is installed on the lower side of the upper lifting and fixing frame system, the upper lifting and fixing frame system is installed on the detection frame, the lower power system is installed on the detection frame, the random stroke selection system is installed with an upper mounting rod, the lower power system is installed with a lower mounting rod, the random stroke selection system comprises an upper selection mounting frame, an ascending selection device and a descending selection device, the ascending selection device and the descending selection device are both rotatably installed on the upper selection mounting frame, the lower end of the upper lifting and fixing frame system has a vertically arranged long hole, and the upper top end height of the ascending selection device changes periodically The rising selection device stops moving after being pressed on the long hole, the height of the lower top end of the descending selection device changes periodically, and the descending selection device stops moving after being pressed on the long hole. A lifting slide is provided on the detection frame, and a lifting power slot is provided on the detection frame. The lifting power slot is connected with the lifting slide, and the lower power system is lifted and lowered along the lifting slide. The lower power system is installed in the lifting power slot, and the lower power system includes a lower traction rod, a lower connecting rod and a lower motor. The lower traction rod is lifted and lowered along the detection frame, and the lower motor is installed on the detection frame. A point of the lower connecting rod is rotatably installed on the lower traction rod, and the lower connecting rod is rotatably installed at an eccentric position of the output end of the lower motor.

2. According to claim 1, the automatic testing machine for dynamic balance of shock absorber seismic resistance is characterized in that: The upper lifting and fixing frame system comprises a lifting frame, a lifting cross bar and a lifting fixing piece, wherein the lifting cross bar is slidably mounted on the lifting frame, the lifting frame is mounted on the detection frame, and the lifting cross bar is mounted on the lifting frame via a lifting fixing rod.

3. According to claim 1, the automatic testing machine for dynamic balance of shock absorber seismic resistance is characterized in that: The rising selection device comprises an upper selection motor, an upper selection gear is eccentrically mounted on the output end of the upper selection motor, and an upper rack meshing with the upper selection gear is arranged on the top of the long hole.

4. According to claim 1, the automatic testing machine for dynamic balance of shock absorber seismic resistance is characterized in that: The descending selection device comprises a lower selection motor, an output end of which is eccentrically mounted with a lower selection gear, and a lower rack meshing with the lower selection gear is provided at the bottom of the long hole.

5. The automatic testing machine for dynamic balance of shock absorber according to claim 1, characterized in that: The upper lifting and fixing frame system is provided with a strain gauge.

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