Shock absorber shock resistance dynamic balance automatic detection machine

Abstract

The invention relates to an automatic detection machine for shock resistance dynamic balance of a shock absorber, which belongs to shock absorber detection equipment and comprises a detection rack, an upper lifting fixing frame system, a lower power system and a random stroke selection system, the random stroke selection system is mounted on the lower side of the upper lifting fixing frame system, and the upper lifting fixing frame system is mounted on the detection rack. The random stroke selection system is provided with an upper installation rod, the lower power system is provided with a lower installation rod, the random stroke selection system comprises an upper selection installation frame, an ascending selection device and a descending selection device, and the ascending selection device and the descending selection device are both installed on the upper selection installation frame. The height of the upper top end of the ascending selection device changes periodically, the ascending selection device stops acting after being pressed in the long hole, the height of the lower top end of the descending selection device changes periodically, and the descending selection device stops acting after being pressed in the long hole. And irregular fluctuation of the rugged road surface can be subjected to simulation test.

Description

Technical Field

[0001] The invention relates to the technical field of shock absorber detection, in particular to an automatic detection machine for dynamic balance of shock absorber seismic resistance. 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 uneven roads and improve the stability and comfort of vehicle driving. The shock absorption performance testing of the shock absorber is a necessary step before the shock absorber leaves the factory.

[0003] The methods and steps of shock absorber inspection generally include appearance inspection: check whether the shock absorber has leakage, deformation or other obvious appearance damage. Most appearance problems can be found through visual inspection; Functional test: use professional equipment to perform compression and tension tests on the shock absorber to measure its damping characteristics, use a special test bench to perform dynamic tests on the shock absorber to simulate the vibration it is subjected to during vehicle driving, and measure the damping force curve under different compression and rebound speeds; Driving test: conduct road tests under safe conditions to feel the stability and comfort of the vehicle under different road conditions; Dynamic test: check the reaction of the shock absorber by pressing the body or emergency braking to determine whether it is working properly; Disassembly inspection: remove the shock absorber for tension and compression tests to check whether it has a stable resistance difference and determine whether there is oil shortage or valve component damage.

[0004] When testing the shock absorber, the existing dedicated test bench is difficult to quickly adjust the degree of shock absorber rebound and extrusion, and cannot adapt to the simulation of irregular ups and downs of uneven roads. Summary of the invention

[0005] In order to overcome the technical defects of the prior art, the present invention provides an automatic detection machine for the dynamic balance of the seismic resistance of a shock absorber, which can perform simulation tests on the irregular ups and downs of a rough road surface.

[0006] The technical solution adopted by the present invention is: A shock absorber seismic resistance dynamic balance automatic detection machine 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 mounted on the upper selection mounting frame, the lower end of the upper lifting and fixing frame system has a vertically arranged long hole, the upper top end height of the ascending selection device changes periodically, the ascending selection device stops after pressing on the long hole, the lower top end height of the descending selection device changes periodically, the descending selection device stops after pressing on the long hole.

[0007] Preferably, the detection frame is provided with a lifting slide, the detection frame is provided with a lifting power slot, the lifting power slot is connected to the lifting slide, the lower power system is lifted and lowered along the lifting slide, and the lower power system is installed in the lifting power slot.

[0008] Preferably, the upper lifting and fixing frame system comprises a lifting frame, a lifting cross bar and a lifting fixing piece, 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.

[0009] Preferably, 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, the lower motor is mounted on the detection frame, one point of the lower connecting rod is rotatably mounted on the lower traction rod, and the lower connecting rod is rotatably mounted at an eccentric position at the output end of the lower motor.

[0010] Preferably, 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 provided at the top of the long hole.

[0011] Preferably, the descending selection device comprises a lower selection motor, a lower selection gear is eccentrically mounted on the output end of the lower selection motor, and a lower rack meshing with the lower selection gear is provided at the bottom of the long hole.

[0012] Preferably, a strain gauge is installed on the upper lifting and fixing frame system.

[0013] The beneficial effects of the present invention are: The random stroke selection system is installed on the lower side of the upper lifting and fixing frame system, and the upper lifting and fixing frame system is installed on the detection frame. The upper lifting and fixing frame system can adjust the installation height on the detection frame according to the needs of different shock absorber models. The lower power system is installed on the detection frame. The random stroke selection system is installed with an upper mounting rod, and the lower power system is installed with a lower mounting rod. The two ends of the shock absorber to be detected are respectively installed on the automatic detection machine through the upper mounting rod and the lower mounting rod. 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 can be 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. The height of the upper top end of the ascending selection device changes periodically, and the ascending selection device stops after pressing the long hole to ensure the pulling stability. The height of the lower top end of the descending selection device changes periodically, and the descending selection device stops after pressing the long hole to ensure the pushing stability. Due to the different periodic changes of the ascending selection device and the descending selection device and the period of the lifting and lowering movement of the lower power system, the effect of randomly changing the pulling and pushing strokes is produced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the present invention.

[0015] Figure 2 This is a schematic diagram of the installation position of the upper selection motor and the lower selection motor.

[0016] Figure 3 This is a schematic diagram of the structure of the ascending selection device.

[0017] Figure 4 for Figure 1 Enlarged schematic diagram at point A in the middle.

[0018] Figure 5 for Figure 2 Enlarged schematic diagram of point B in the middle.

[0019] Figure 6 It is a schematic cross-sectional view of the principles of the rising selection device and the descending selection device.

[0020] Description of reference numerals: 1. Detection rack; 11. Lifting slide; 12. Lifting power slot; 2. Upper lifting and fixing frame system; 21. Long hole; 22. Lifting frame; 23. Lifting cross bar; 3. Lower power system; 31. Lower traction rod; 32. Lower connecting rod; 33. Lower motor; 4. Random stroke selection system; 41. Upper selection mounting frame; 411. Guide slide block; 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; 5. Install the rod; 6. Install the rod. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings: like Figure 1 — Figure 6 As shown, this embodiment provides an automatic testing machine for dynamic balance of shock absorber seismic resistance, including a testing frame 1, an upper lifting and fixing frame system 2, a lower power system 3 and a random stroke selection system 4, wherein the random stroke selection system 4 is installed on the lower side of the upper lifting and fixing frame system 2, the upper lifting and fixing frame system 2 is installed on the testing frame 1, the upper lifting and fixing frame system 2 can adjust the installation height on the testing frame 1 according to the needs of different shock absorber models, the lower power system 3 is installed on the testing frame 1, the random stroke selection system 4 is installed with an upper mounting rod 5, the lower power system 3 is installed with a lower mounting rod 6, the two ends of the shock absorber to be tested are respectively installed on the automatic testing machine through the upper mounting rod 5 and the lower mounting rod 6, and the random stroke selection system 4 includes It includes an upper selection mounting frame 41, an ascending selection device 42 and a descending selection device 43. Both the ascending selection device 42 and the descending selection device 43 can be rotatably mounted on the upper selection mounting frame 41. The lower end of the upper lifting and fixing frame system 2 has a vertically arranged long hole 21. The height of the upper top end of the ascending selection device 42 changes periodically. The ascending selection device 42 stops moving after pressing on the long hole 21 to ensure stable pulling. The height of the lower top end of the descending selection device 43 changes periodically. The descending selection device 43 stops moving after pressing on the long hole 21 to ensure stable pushing. Since the periodic changes of the ascending selection device 42 and the descending selection device 43 are different from the period of the lifting and lowering movement of the lower power system 3, an effect of randomly changing the pulling and pushing strokes is produced.

[0022] Specifically, a lifting slide 11 is provided on the detection frame 1, and a lifting power groove 12 is provided on the detection frame 1. The lifting power groove 12 is connected with the lifting slide 11. The lower power system 3 is lifted and lowered along the lifting slide 11, and then the shock absorber is lifted and lowered. 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 traction action of the lower power system 3.

[0023] Specifically, the upper lifting and fixing frame system 2 includes a lifting frame 22, a lifting cross bar 23 and a lifting fixing piece. The lifting cross bar 23 is slidably installed on the lifting frame 22, and 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 piece, and then the height of the lifting cross bar 23 is adjusted to adapt to different shock absorbers. Specifically, the lifting fixing piece is a screw. When the lifting cross bar 23 needs to be fixed on the lifting frame 22, the screw is tightened so that the screw supports the lifting frame 22, and then the height of the lifting cross bar 23 is adjusted.

[0024] In order to ensure the stable operation of the rising selection device 42 and the descending selection device 43, the upper selection mounting frame 41 is installed with a guide slider 411 sliding along the long hole 21. When the lower power system 3 pulls the shock absorber up and down, the rising selection device 42 and the descending selection device 43 are intermittently pressed on the upper and lower ends of the long hole 21. Since the height of the upper top of the rising selection device 42 changes periodically and the height of the lower top of the descending selection device 43 changes periodically, the extension and retraction strokes of the shock absorber have randomness.

[0025] 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 is lifted and lowered 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. The lower connecting rod 32 is rotatably installed at an eccentric position at the output end of the lower motor 33. The action of the lower motor 33 pulls the lower traction rod 31 to lift and lower, thereby driving the shock absorber to move.

[0026] The most important function of the present invention is to randomly change the compression and extension stroke of the shock absorber, and the randomness of the stroke depends on the rising selection device 42 and the falling selection device 43.

[0027] Specifically, the rising selection device 42 includes an upper selection motor 421, and an upper selection gear 422 is eccentrically installed at the output end of the upper selection motor 421. The specific installation method is detailed below. An upper rack meshing with the upper selection gear 422 is provided at the top of the long hole 21. After the upper selection gear 422 contacts the long hole 21, it stops due to the meshing action between the long hole 21, thereby ensuring stable transmission.

[0028] Specifically, the descending selection device 43 includes a lower selection motor 431, and a lower selection gear 432 is eccentrically installed at the output end of the lower selection motor 431. The specific installation method is detailed below. A lower rack meshing with the lower selection gear 432 is provided at the bottom of the long hole 21. After the lower selection gear 432 contacts the long hole 21, it stops due to the meshing action between the long hole 21, thereby ensuring stable transmission.

[0029] Specifically, both upper and lower ends of the long hole 21 are rack profiles, which prevents the upper selection gear 422 and the lower selection gear 432 from continuing to rotate after being pressed onto the upper and lower ends of the long hole 21 .

[0030] Since the upper selection gear 422 and the lower selection gear 432 need to intermittently mesh with the upper and lower ends of the long hole 21, in order to prevent damage to the upper selection motor 421 and the lower selection motor 431, an upper friction plate 423 is slidably installed on the upper selection gear 422, and 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, and the upper compression spring pushes the upper friction plate 423 to rub against 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 installed on the lower selection gear 432, and the lower selection gear 432 and the lower friction plate 433 are circumferentially fixed. There is a downward compression spring, which pushes the lower friction plate 433 to rub against 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 the changes in 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 engagement timing of the upper selection gear 422 and the lower selection gear 432 with the long hole 21 random, thereby randomly changing the compression and extension stroke of the shock absorber, making the test more simulated.

[0031] It is worth noting 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 respectively limited, the impact between the upper selection gear 422, the lower selection gear 432 and the long hole 21 can be ignored, so that the equipment can operate reliably for a long time.

[0032] Specifically, strain gauges are installed on the upper lifting and fixing frame system 2 to record changes in tension and pressure. This is a prior art and will not be described in detail here.

[0033] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An automatic testing machine for dynamic balance of shock absorber, characterized in that: It includes 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 installed with an upper mounting rod, the lower power system is installed with a lower mounting rod, 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 can be 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, the upper top end of the ascending selection device changes in height periodically, the ascending selection device stops moving after pressing the long hole, the lower top end of the descending selection device changes in height periodically, the descending selection device stops moving after pressing the long hole.

2. According to claim 1, the automatic testing machine for dynamic balance of shock absorber seismic resistance is characterized in that: The detection frame is provided with a lifting slide, the detection frame is provided with a lifting power slot, the lifting power slot is connected with the lifting slide, the lower power system is lifted and lowered along the lifting slide, and the lower power system is installed in the lifting power slot.

3. 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.

4. According to claim 1, the automatic testing machine for dynamic balance of shock absorber seismic resistance is characterized in that: 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. 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.

5. The automatic testing machine for dynamic balance of shock absorber according to claim 1, 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.

6. The automatic testing machine for dynamic balance of shock absorber according to claim 1, 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.

7. 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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