Vibration test bench for shock absorber and test method thereof

Abstract

The invention relates to a vibration test bench for a shock absorber and a test method thereof, and relates to the technical field of vibration test equipment. The device comprises a base and a fixing frame arranged on the base, and a fixing assembly used for fixing a to-be-tested piece is arranged between the base and the fixing frame; a machine frame is arranged on the side, away from the base, of the fixing frame, a clamping assembly used for clamping the to-be-tested end of a to-be-tested piece is arranged on the machine frame, and a lifting piece is arranged on the machine frame and used for driving the clamping assembly to conduct high-frequency lifting movement; the test bench has the effect of improving the test precision of the test bench.

Description

Technical Field

[0001] This application relates to the technical field of vibration testing equipment, and in particular to a vibration test bench for shock absorbers and its testing method. Background Art

[0002] As a core component of a vehicle suspension system, the performance of a shock absorber directly affects driving comfort and safety. Vibration testing is an important means to evaluate the dynamic characteristics of shock absorbers. In order to meet different bump conditions on different road surfaces, vibration test benches are commonly used in the industry to simulate actual working conditions.

[0003] In related technologies, a vibration test bench includes a frame and a fixture provided on the frame. The fixture is used to clamp the piston rod of the top cylinder of the test piece to be measured. A fixing structure for fixing the test piece to be measured is installed on the frame. A high-frequency electric cylinder is provided on the frame, and the output end of the high-frequency electric cylinder is fixedly connected to the fixture. The high-frequency electric cylinder applies a moving force to the fixture and the piston rod to drive the fixture to drive the piston rod to move at a high frequency along the telescopic direction of the output end of the high-frequency electric cylinder, so as to simulate a simulated vibration test on the piston rod of the test piece to be measured.

[0004] In view of the above related technologies, in order to accurately reproduce the vibration conditions of complex road conditions, it is necessary to continuously increase the simulated vibration intensity. When the high-frequency electric cylinder applies a moving test force of nearly 10 kN to the fixture and the test area of the shock absorber, in order to ensure stable clamping of the test area of the shock absorber by the fixture, considering the friction coefficient between the fixture and the test area of the shock absorber, it is usually necessary for the fixture to provide a clamping force far greater than 10 kN to the test area of the shock absorber; moreover, in order to reduce the influence on the test data of the high-frequency electric cylinder and the space for installing the fixture structure inside the vibration test bench is very limited, it is necessary to control the overall weight and inertia of the fixture structure. However, in the prior art, it is difficult for a lightweight clamping structure to provide such a large clamping force in a limited space, resulting in the phenomenon that the fixture and the test area of the shock absorber are easily misaligned during high-intensity testing, thus affecting the final test accuracy, so it needs to be improved. Summary of the Invention

[0005] In order to improve the test accuracy of the test bench, this application provides a vibration test bench for shock absorbers and its testing method.

[0006] In a first aspect, a vibration test bench for shock absorbers provided by this application adopts the following technical solutions: A vibration test bench for a shock absorber comprises a base and a fixing frame arranged on the base, a fixing assembly for fixing a workpiece to be tested is arranged between the base and the fixing frame; a frame is arranged on a side of the fixing frame away from the base, a clamping assembly for clamping a test end of the workpiece to be tested is arranged on the frame, and a lifting member is arranged on the frame for driving the clamping assembly to perform high-frequency lifting and lowering movements.

[0007] By adopting the above technical solution, the fixing component fixes the test piece and the base, the clamping component provides a stable clamping force of not less than 10kN to the test end of the test piece, and the output end of the lifting component drives the clamping component to drive the test end of the test piece to perform high-frequency lifting and lowering movements, so as to perform stable vibration testing on the test end of the test piece, thereby improving the test accuracy of the test bench.

[0008] Preferably, the fixing assembly includes a fixing block, a bearing seat, a positioning member, a lifting plate and a lifting cylinder; the fixing block is arranged on the side wall of the fixing frame facing the base, and a passage opening is provided on the fixing block for the tested end of the test piece to pass through, and the fixing block is provided with a flared groove for the tested end to be pressed into the inner side wall of the passage opening, and a makeshift opening is provided on the outer side wall of the fixing block to facilitate the tested end of the tested piece to press into the passage opening; the bearing seat is arranged on the side wall of the base facing the fixed block, and the positioning member is arranged on the bearing seat for auxiliary positioning of the tested piece; the lifting plate is arranged on the side wall of the bearing seat facing the base, and the lifting cylinder is arranged on the base for driving the lifting plate close to or away from the fixed block.

[0009] By adopting the above technical solution, the positioning member stably positions the workpiece to be tested on the supporting seat, and the output end of the lifting cylinder drives the lifting plate to bring the workpiece to be tested gradually closer to the fixed block, so that the end of the workpiece to be tested gradually passes through the passage, and the end of the workpiece to be tested away from the supporting seat is pressed into the inside of the flared groove, so as to achieve the fixation of the workpiece to be tested.

[0010] Preferably, the positioning member includes a positioning seat, a plug-in rod, an anti-slip plate and a positioning rod; the positioning seat is arranged at the end of the supporting seat facing the fixed block, and the side wall of the positioning seat is provided with a placement notch for facilitating the insertion of the end of the test piece away from the fixed block; the inner side wall of the placement notch is penetrated by a plug-in hole, the plug-in rod is passed through the inside of the plug-in hole, the anti-slip plate is arranged at the end of the plug-in rod, and the anti-slip plate faces the side wall of the plug-in rod and abuts against the inner side wall of the placement notch; the positioning rod is arranged on the side wall of the anti-slip plate away from the plug-in rod, so as to pass through the end of the test piece away from the fixed block.

[0011] By adopting the above technical solution, the insertion rod is inserted into the insertion hole, realizing the rapid positioning of the insertion rod and the positioning seat; the positioning rod penetrates through the end of the component to be measured away from the fixed block, and the anti-disengagement plate restricts the insertion rod and the positioning rod from disengaging from the positioning seat, so as to use the positioning rod to realize the rapid positioning of the component to be measured, reducing the phenomenon that the component to be measured is skewed during the process of the bearing seat driving the component to be measured to move up and down.

[0012] Preferably, the clamping assembly includes a mounting plate, a mounting block, two clamping arms, a clamping block and a driving member; the mounting plate is arranged at the output end of the lifting member, and the mounting block is arranged on the side wall of the mounting plate away from the lifting member; the two clamping arms are both rotatably arranged at the end of the mounting block facing the fixed frame, and the clamping arms are distributed on both sides of the width direction of the mounting block relatively; the clamping block is arranged on the side walls of the two clamping arms facing each other, and clamping grooves for the end to be measured of the component to be measured to be inserted are formed on the side walls of the two clamping blocks facing each other; the side walls of the two clamping arms facing away from each other are both inclined in the direction away from the clamping block, and the driving member is arranged on the mounting plate to be used for driving the two clamping blocks to approach or separate from each other.

[0013] By adopting the above technical solution, the driving member drives the two clamping arms to rotate, making the clamping blocks approach each other, so as to provide a stable clamping force for the end to be measured of the component to be measured; when driving the clamping arms to drive the clamping blocks to separate from each other, the clamping of the clamping blocks on the component to be measured can be quickly cancelled, so as to replace the component to be measured.

[0014] Preferably, the driving member includes a driving frame, a driving cylinder, a rolling wheel and a warping block; the driving frame is slidably arranged outside the two clamping arms, and the driving cylinder is arranged between the driving frame and the mounting plate to be used for driving the driving frame to approach or move away from the mounting plate; the rolling wheel is rotatably arranged inside the driving frame, all the clamping arms are located between the two rolling wheels, the rolling wheels and the clamping arms are arranged in one-to-one correspondence respectively, and the side wall of each rolling wheel facing the clamping arm abuts against the side wall of the corresponding clamping arm; the ends of the two clamping arms away from the mounting block both extend in the direction away from each other, and the distance between each clamping arm and the corresponding rolling wheel gradually decreases in the direction away from the mounting block; the warping block is bent and arranged on the side walls of the two clamping arms facing away from each other, each warping block is located at the end of the clamping arm close to the mounting block, and each warping block can abut against the corresponding rolling wheel.

[0015] By adopting the above technical solution, the output end of the driving cylinder drives the driving frame to move up and down. When the driving frame drives the rolling wheel to gradually approach the clamping block, the two clamping blocks gradually approach each other and stably clamp the end to be measured of the component to be measured; when the driving frame drives the rolling wheel to gradually approach and abut against the warping block, the warping block makes the end of the clamping arm drive the clamping block to gradually separate from each other, so as to facilitate the clamping block to cancel the clamping of the component to be measured; The overall structure of the clamping assembly is very compact, highly symmetrical and lightweight, facilitating the provision of a clamping force of no less than 30 kN to the clamping block and the component under test within the compact internal space of the test bench, thereby ensuring the clamping stability of the component under test during high-intensity tests. Moreover, the symmetrical and lightweight clamping assembly reduces the offloading during the testing process of the lifting member, minimizing the impact on the final test data, thus ensuring the final test accuracy.

[0016] Preferably, a pressing assembly is provided on the positioning seat for assisting in pressing and fixing the component under test; a clamping assembly is provided on the positioning seat for clamping and fixing the component under test to the positioning seat.

[0017] By adopting the above technical solution, the pressing assembly assists in pressing and fixing the component under test inside the positioning seat, and the clamping assembly clamps and fixes the component under test to the positioning seat, improving the connection stability between the component under test and the positioning seat, thereby enhancing the fixing stability of the fixing assembly to the component under test, and further improving the accuracy and stability of the vibration test bench in detecting the component under test.

[0018] Preferably, the pressing assembly includes a rotating shaft, a pressing rod, a pressing block, a torsion member and a linkage member; the rotating shaft is rotatably arranged on the lifting plate, the pressing rod is arranged on the rotating shaft, the pressing block is arranged on the side wall of the pressing rod facing the positioning seat, and the pressing block is provided with a pressing groove for the end of the component under test to abut against; the torsion member is arranged between the pressing rod and the lifting plate to drive the pressing rod to move away from the positioning seat by its own torsion; the linkage member is arranged on the lifting plate for driving the pressing rod to drive the pressing block to approach the positioning seat.

[0019] By adopting the above technical solution, the torsion member drives the pressing rod to drive the pressing block away from the positioning seat, reducing the phenomenon that the placement notch is blocked by the pressing block and affecting the feeding of the component under test; the linkage member drives the pressing rod to drive the pressing block to approach the positioning seat, facilitating the stable pressing and fixing of the component under test inside the positioning seat by the pressing block.

[0020] Preferably, the linkage member includes a linkage block, a traction rope and a guide wheel; the linkage block is arranged on the pressing rod, the traction rope is arranged on the linkage block, the guide wheel is mounted on the lifting plate, and the end of the traction rope away from the linkage block passes through the guide wheel and is connected to the base.

[0021] By adopting the above technical solution, after the workpiece to be tested is placed inside the positioning seat and simply positioned by the positioning rod, during the process of driving the lifting plate to drive the positioning seat away from the base by the lifting oil cylinder, the traction rope is used to drive the pressing rod to drive the pressing block to rotate towards the positioning seat, and the end of the workpiece to be tested inside the positioning seat is stably pressed, improving the connection stability between the positioning seat and the workpiece to be tested, reducing the phenomenon that the workpiece to be tested is skewed through the placement notch during the test process, and thus improving the test accuracy; and during the process of driving the lifting plate to drive the positioning seat close to the base by the lifting oil cylinder, the traction rope is gradually relaxed, and the torsion of the torsion member is used to drive the pressing rod and the pressing block to gradually move away from the positioning seat for resetting, so as to facilitate the feeding of the subsequent workpiece to be tested; in addition, the lifting movement of the lifting plate is used to drive the pressing block, reducing the need to additionally provide a controller and a power source to drive the pressing block, simplifying the operation process of the overall equipment and saving costs.

[0022] Preferably, the clamping assembly includes a mounting shaft, a rotating arm, a clamping block, a reset member, a pull rope and a wire harness holder; the mounting shaft is rotatably arranged on both sides in the width direction of the positioning seat, the rotating arm is arranged on each group of mounting shafts, the clamping block is arranged at the end of each group of rotating arms away from the mounting shaft, and the clamping block is located on the side wall of the rotating arm facing the positioning seat. Through holes communicating with the inside of the placement notch are formed in both side walls in the width direction of the positioning seat for the clamping block to pass through, and the clamping block is used to clamp and fix the workpiece to be tested inside the placement notch; the reset member is arranged between the rotating arm and the positioning seat to drive each group of rotating arms to move away from the positioning seat by its own torsion; the pull rope is arranged at the end of each group of rotating arms away from the mounting shaft, the wire harness holder is arranged on the positioning seat, and the end of each pull rope away from the rotating arm passes through the wire harness holder and is connected to the base.

[0023] By adopting the above technical solution, the reset member drives the rotating arm to drive the clamping block away from the positioning seat by its own torsion, reducing the phenomenon that the clamping block hinders the convenient feeding of the workpiece to be tested; during the process of driving the lifting plate to drive the positioning seat away from the base by the lifting oil cylinder, the pull rope is used to drive the rotating arm to drive the clamping block to rotate towards the positioning seat, and the lifting movement of the lifting plate is used to drive the clamping block, saving costs; In addition, by using the cooperation of the reset member and the pull rope with the lifting movement of the positioning seat, the two steps of jacking up the positioning seat and closing the clamping block to clamp the workpiece to be tested are combined into one step, and the two steps of lowering the positioning seat and rotating the clamping block to open the placement notch are combined into one step, ensuring the stable fixation of the workpiece to be tested while simplifying the operation steps and production costs.

[0024] In the second aspect, The present application provides a test method for a vibration test bench for a shock absorber, including the following steps: Loading: The fixing component fixes the component to be tested on the fixing frame to achieve the loading of the component to be tested; Clamping: The clamping component clamps and fixes the end to be tested of the component to be tested that has been fixed; Testing: The lifting component drives the clamping component to drive the end to be tested of the component to be tested to perform high-frequency lifting movement for vibration testing.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: By setting the fixing component to fix the component to be tested and the base, the clamping component provides a stable clamping force of not less than 30 kN for the end to be tested of the component to be tested, and the output end of the lifting component drives the clamping component to drive the end to be tested of the component to be tested to perform high-frequency lifting movement, so as to perform stable vibration testing on the end to be tested of the component to be tested, thereby improving the testing accuracy of the test bench; By setting the clamping component to cooperate with the lifting component, the overall structure of the clamping component is very compact. In this embodiment, the occupied space is only 260 mm * 70 mm * 220 mm in size. The overall clamping structure is symmetrical and very lightweight, reducing the influence of using the lifting component to test the component to be tested; By setting the pressing component to assist in pressing and fixing the component to be tested inside the positioning seat, and the clamping component clamps and fixes the component to be tested on the positioning seat, the connection stability between the component to be tested and the positioning seat is improved, thereby improving the fixing stability of the fixing component for the component to be tested, and further improving the accuracy and stability of the vibration test bench for detecting the component to be tested. Description of the Drawings

[0026] Figure 1 is a schematic structural diagram of a vibration test bench for a shock absorber and its test method according to Embodiment 1 of the present application.

[0027] Figure 2 is a schematic structural diagram for reflecting the connection relationship between the clamping component and the component to be tested in Embodiment 1.

[0028] Figure 3 is an exploded schematic diagram for reflecting the connection relationship between the fixing component and the component to be tested in Embodiment 1.

[0029] Figure 4 is an exploded schematic diagram for reflecting the connection relationship between the lifting component and the clamping component in Embodiment 1.

[0030] Figure 5 is a schematic structural diagram for reflecting the connection relationship between the pressing component and the positioning seat in Embodiment 2.

[0031] Figure 6 is a schematic structural diagram for reflecting the connection relationship between the clamping component and the positioning seat in Embodiment 2.

[0032] Description of the reference numerals: 1. Base; 10. Component to be measured; 101. End to be measured; 11. Fixing frame; 12. Frame; 13. Lifting member; 2. Fixing assembly; 21. Fixing block; 211. Passing port; 212. Yielding port; 22. Bearing seat; 23. Positioning member; 231. Positioning seat; 2311. Placing notch; 2312. Insertion hole; 2313. Yielding notch; 232. Insertion rod; 233. Anti - detachment plate; 234. Positioning rod; 24. Lifting plate; 25. Lifting oil cylinder; 3. Clamping assembly; 31. Mounting plate; 32. Mounting block; 33. Clamping arm; 34. Clamping block; 341. Clamping groove; 35. Driving member; 351. Driving frame; 352. Driving cylinder; 353. Rolling wheel; 354. Warping block; 4. Pressing assembly; 41. Rotating shaft; 42. Pressing rod; 43. Pressing block; 431. Pressing groove; 44. Torsion member; 45. Linking member; 451. Linking block; 452. Traction rope; 453. Guide wheel; 5. Clamping and connecting assembly; 51. Mounting shaft; 52. Rotating arm; 53. Clamping block; 54. Reset member; 55. Pulling rope; 56. Cable rack. Detailed implementation manners

[0033] The following further elaborates on this application in conjunction with the attached Figure 1-6 drawings for a more detailed description.

[0034] Embodiment 1: Embodiment 1 of this application discloses a vibration test bench for shock absorbers and its test method, which is used to improve the clamping stability of the area to be measured of the shock absorber and improve the test accuracy of the test bench.

[0035] Refer to Figure 1 and Figure 2 , a vibration test bench for shock absorbers includes a base 1 fixed to the ground by anchor bolts and a fixing frame 11 fixedly installed on the base 1 through three columns. A frame 12 fixedly connected to the columns is installed on one side of the fixing frame 11 away from the base 1. In this embodiment, the three columns are arranged in a triangular shape to improve the stability of the overall device.

[0036] Refer to Figure 1 , Figure 2 and Figure 3A fixing assembly 2 for securing a test piece 10 is mounted between the base 1 and the fixing frame 11. Specifically, the test piece 10 is a shock absorber to be tested. A clamping assembly 3 for clamping the test end 101 of the test piece 10 is mounted on the frame 12. A lifting member 13 is mounted on the frame 12. The lifting member 13 is a high-frequency electric cylinder. The output end of the lifting member 13 is fixedly connected to the clamping assembly 3, driving the clamping assembly 3 to move the test end 101 of the test piece 10 at high frequency. A vibration sensor electrically connected to a computer terminal is mounted on the base 1 via a bracket to detect the impact force applied to the base 1 after the test piece 10 has been subjected to shock absorption.

[0037] Reference Figure 2 and Figure 3 The fixing assembly 2 includes a fixing block 21, a bearing seat 22, a positioning member 23, a lifting plate 24, and a lifting cylinder 25. The fixing block 21 is fixed to the side wall of the fixing frame 11 facing the base 1 by screws. The fixing block 21 is provided with a passage 211 for the test end 101 of the test piece 10 to pass through. The outer wall of the fixing block 21 is provided with a clearance opening 212 to facilitate the test end 101 of the test piece 10 to enter the passage 211. The fixing frame 11 is also provided with a passage gap for the test piece 10 to pass through. The fixing block 21 is provided with a flared groove on the inner side wall of the passage 211 for the test piece 10 to enter. The inner diameter of the flared groove gradually increases in the direction away from the fixing frame 11, so that the test piece 10 can enter the flared groove.

[0038] Reference Figure 1 and Figure 3 Lifting cylinder 25 is fixedly mounted within base 1, with the output end of lifting cylinder 25 extending through the upper surface of base 1. Lifting plate 24 is fixedly mounted to the output end of lifting cylinder 25, and a lifting rod is slidably connected to base 1 via a guide rod. Supporting seat 22 is fixedly mounted to the side wall of lifting plate 24 facing away from base 1 via screws. Positioning member 23 is fixedly mounted on supporting seat 22 to assist in positioning test piece 10.

[0039] Reference Figure 1 and Figure 3, the positioning member 23 includes a positioning seat 231, a plugging rod 232, an anti - detachment plate 233 and a positioning rod 234; the positioning seat 231 is threadedly installed at the end of the bearing seat 22 facing the fixed block 21. A placement notch 2311 is formed on the side wall of the positioning seat 231, and the inner side wall of the placement notch 2311 is in fitting contact with the outer side wall of the end of the workpiece to be measured 10 away from the fixed block 21, so that the end of the workpiece to be measured 10 away from the fixed block 21 can be inserted. An insertion hole 2312 is formed through the inner side wall of the placement notch 2311. The plugging rod 232 is slidably inserted into the insertion hole 2312. The anti - detachment plate 233 is integrally formed at the end of the plugging rod 232 facing the inside of the placement notch 2311, and a groove is formed on the inner side wall of the placement notch 2311 around the insertion hole 2312 for the anti - detachment plate 233 to be inserted into.

[0040] Referring to Figure 1 and Figure 4 , the clamping assembly 3 includes a mounting plate 31, a mounting block 32, two groups of clamping arms 33, a clamping block 34 and a driving member 35; the mounting plate 31 is fixedly installed at the output end of the lifting member 13 by screws, and the mounting block 32 is fixedly connected to the side wall of the mounting plate 31 facing away from the lifting member 13 by screws. The two groups of clamping arms 33 are rotatably installed at the end of the mounting block 32 facing the fixing frame 11 through rotating shafts, and the clamping arms 33 are distributed on both sides of the width direction of the mounting block 32.

[0041] Referring to Figure 2 and Figure 4 , the clamping block 34 is snap - fitted and installed on the side walls of the two groups of clamping arms 33 facing each other. The clamping block 34 is located at the end of each group of clamping arms 33 away from the mounting block 32, and clamping grooves 341 for the measured end 101 of the workpiece to be measured 10 to be inserted are formed on the side walls of the two groups of clamping blocks 34 facing each other, so as to increase the contact area between the clamping block 34 and the measured end 101 of the workpiece to be measured 10. In this embodiment, the side walls of the two groups of clamping arms 33 facing away from each other are inclined in a direction away from the clamping block 34. Specifically, the included angle between the inclination direction of the side wall of each group of clamping arms 33 away from the clamping block 34 and the vertical direction is not less than 4.2 degrees.

[0042] Referring to Figure 1 and Figure 4 , the driving member 35 is installed on the mounting plate 31 for driving the two groups of clamping blocks 34 to approach or separate from each other. The driving member 35 includes a driving frame 351, a driving cylinder 352, a rolling wheel 353 and a warping block 354; the driving cylinder 352 is fixedly installed on the side wall of the mounting plate 31 facing the mounting block 32, and the driving cylinder 352 is located at both ends of the mounting plate 31 in the length direction. The driving frame 351 is fixedly connected to the output ends of the two groups of driving cylinders 352, so as to realize lifting movement through the telescopic movement of the output ends of the driving cylinders 352, and the two groups of clamping arms 33 are both located inside the driving frame 351.

[0043] Reference Figure 1 and Figure 4 The rolling wheels 353 are rotatably mounted inside the drive frame 351 via a rotating shaft, and all clamping arms 33 are located between two sets of rolling wheels 353. The rolling wheels 353 are respectively arranged in a one-to-one correspondence with the clamping arms 33, and each set of rolling wheels 353 faces the side wall of the clamping arm 33 and is used to press the side wall of the corresponding clamping arm 33.

[0044] Reference Figure 2 and Figure 4 The ends of the two groups of clamping arms 33 away from the mounting block 32 are extended in directions away from each other, and the distance between each group of clamping arms 33 and the corresponding rolling wheel 353 gradually increases toward the mounting block 32, so that when the rolling wheel 353 moves away from the mounting block 32, the two groups of rolling wheels 353 press the ends of the clamping blocks 34 driven by the clamping arms 33, and make the two groups of clamping blocks 34 gradually approach each other, and provide a clamping force of not less than 10kN on the test end 101 of the test piece 10.

[0045] Reference Figure 2 and Figure 4 The warping blocks 354 are bent and formed on the sidewalls of the two sets of clamping arms 33 that are spaced apart from each other. Each set of warping blocks 354 is located at the end of the clamping arm 33 near the mounting block 32, and each set of warping blocks 354 extends away from the clamping arm 33. Each set of warping blocks 354 can abut against a corresponding rolling wheel 353. When the rolling wheel 353 abuts against the corresponding warping block 354, the two sets of clamping arms 33 can be driven to move the ends of the clamping blocks 34 away from each other, thereby loosening the clamping of the test end 101 of the test piece 10.

[0046] In this embodiment, the selection of the cylinder diameter of the driving cylinder 352 is as follows: Set according to common actual conditions: The friction coefficient between the clamping block 34 and the end to be measured 101 is: 0.3; The pressure provided by the air pressure system used to drive the cylinder 352 is: 0.5MPa; The maximum moving force provided by the output end of the lifting member 13 is: 10kN; The force-increasing angle of the clamping arm 33 away from the inclined side wall of the clamping block 34 is: 4.2°; The clamping force perpendicular to the end to be tested 101 is not less than: 10 / 0.3=30kN; According to the force-boosting angle of 4.2°, The output force of the driving cylinder 352 must be no less than: 30*sin(4.2°)≈2.2kN; According to the installation method of the driving cylinder 352 and in cooperation with the 0.5 Mpa pressure provided by the pneumatic system, the cross-sectional area of the driving cylinder 352 should not be less than: 2.2 * 1000 / 0.5 = 4000 mm 2 ; the cylinder diameter of the driving cylinder 352 should not be less than: SQRT(4000 / 3.14) * 2 ≈ 71.4 mm; In summary, in this embodiment, the driving cylinder 352 preferably has a cylinder diameter size of 100 mm. In the embodiment of the present application, when the lifting member 13 applies a vertical moving force of 10 kN to the test end 101, the driving cylinder 352 cooperates with the clamping arm 33 and the clamping block 34 to be able to apply a stable clamping force of not less than 30 kN in the horizontal direction to the test end 101.

[0047] The implementation principle of the vibration test bench for a shock absorber in Embodiment 1 of the present application is as follows: The test piece 10 is placed inside the placement notch 2311 of the positioning seat 231, and the end of the test piece 10 is sleeved on the positioning rod 234; the output end of the lifting oil cylinder 25 drives the lifting plate 24 to drive the positioning seat 231 and the test piece 10 to gradually approach the fixed block 21, and the test end 101 of the test piece 10 penetrates through the through port 211, and the end of the test piece 10 away from the positioning seat 231 is inserted into the flared groove, realizing the stable feeding of the test piece 10.

[0048] The output end of the driving cylinder 352 drives the driving frame 351 to gradually move away from the mounting block 32, so that the rolling wheel 353 rolls on the end of the clamping arm 33 driving the clamping block 34, so that the two clamping blocks 34 approach each other and stably clamp the test end 101 of the test piece 10. The output end of the lifting member 13 drives the mounting plate 31 to drive the clamping block 34 and the test end 101 of the test piece 10 to perform high-frequency lifting and moving, so as to realize the stable test of the test end 101 of the test piece 10, thereby improving the clamping stability of the test area of the shock absorber and improving the test accuracy of the test bench.

[0049] Embodiment 1 of the present application also discloses a test method for a vibration test bench for a shock absorber, including the following steps: Feeding: The fixing component 2 fixes the test piece 10 on the fixing frame 11 to realize the feeding of the test piece 10; Clamping: The clamping component 3 clamps and fixes the test end 101 of the fixed test piece 10; Test: The lifting member 13 drives the clamping assembly 3 to drive the test end 101 of the test piece 10 to perform high-frequency lifting movement for vibration testing; the vibration sensor detects the impact force received by the base 1 and transmits it to the inside of the calculator terminal, so as to detect the motion characteristics of the test piece 10 at different vibration speeds and frequencies, and then form a corresponding curve graph to confirm the function of the shock absorber.

[0050] Embodiment 2: The difference between Embodiment 2 and Embodiment 1 is: Refer to Figure 5 and Figure 6 , a pressing assembly 4 is installed on the positioning seat 231 for assisting in pressing and fixing the test piece 10; the pressing assembly 4 includes a rotating shaft 41, a pressing rod 42, a pressing block 43, a torsion member 44 and a linkage member 45; the rotating shaft 41 is rotatably connected to the side wall of the lifting plate 24, the pressing rod 42 is integrally formed on the rotating shaft 41, and the pressing block 43 is integrally formed at the end of the pressing rod 42 away from the rotating shaft 41. The pressing block 43 is located on the side wall of the pressing rod 42 facing the positioning seat 231, and a pressing groove 431 for the end of the test piece 10 to be inserted into is formed on the side wall of the pressing block 43, so that the end of the test piece 10 is closely attached to the inner side wall of the pressing groove 431.

[0051] Refer to Figure 5 and Figure 6 , in this embodiment, the torsion member 44 is a torsion spring; the torsion member 44 is sleeved on the rotating shaft 41, one end of the torsion member 44 is adhesively connected to the pressing rod 42, and the other end of the torsion member 44 is adhesively connected to the lifting plate 24. The torsion member 44 drives the pressing rod 42 to drive the pressing block 43 to rotate in a direction away from the positioning seat 231 through its own torsion.

[0052] Refer to Figure 5 and Figure 6 , the linkage member 45 is installed on the lifting plate 24 for driving the pressing rod 42 to drive the pressing block 43 to approach the positioning seat 231. The linkage member 45 includes a linkage block 451, a traction rope 452 and a guide wheel 453; the linkage block 451 is fixedly installed on the side wall of the pressing rod 42, and the traction rope 452 is fixedly installed on the side wall of the linkage block 451. The guide wheel 453 is rotatably installed on the side wall of the lifting plate 24 through a bracket, and the end of the traction rope 452 away from the linkage block 451 passes through the guide wheel 453 and is fixedly connected to the base 1.

[0053] Refer to Figure 5 and Figure 6When the lifting cylinder 25 drives the lifting plate 24 to move the positioning seat 231 away from the base 1, the traction rope 452 gradually tightens, and pulls the linkage block 451 to drive the pressing rod 42 to rotate, so that the pressing rod 42 drives the pressing block 43 to rotate toward the positioning seat 231, and the pressing block 43 stably presses the end of the test piece 10 inside the positioning seat 231.

[0054] Reference Figure 5 and Figure 6 A clamping assembly 5 is mounted on the positioning seat 231 to secure the test piece 10 to the positioning seat 231. The clamping assembly 5 includes a mounting shaft 51, a rotating arm 52, a clamping block 53, a reset member 54, a pull rope 55, and a cable tie 56. The mounting shafts 51 are rotatably mounted on both sides of the positioning seat 231 in the width direction via brackets, and the rotating arms 52 are fixedly mounted on the peripheral wall of each set of mounting shafts 51. Clearance notches 2313 are formed through the side walls of both sides of the positioning seat 231 in the width direction, and the clearance notches 2313 are connected to the interior of the placement notch 2311.

[0055] Reference Figure 5 and Figure 6 The engaging blocks 53 are integrally formed at the ends of each set of rotating arms 52, distal from the mounting shaft 51. The engaging blocks 53 are located on the sidewalls of the rotating arms 52 facing the positioning seat 231. In this embodiment, the sidewalls of the engaging blocks 53 engage with the ends of the DUT 10 located within the positioning seat 231. The engaging blocks 53 can pass through the clearance notches 2313 and engage with the ends of the DUT 10 located within the positioning seat 231, thereby preventing the DUT 10 from disengaging from the positioning seat 231.

[0056] Reference Figure 5 and Figure 6 In this embodiment, the reset member 54 is a torsion spring; the reset member 54 is sleeved onto the mounting shaft 51. One end of the reset member 54 is adhesively connected to the rotating arm 52, and the other end of the reset member 54 is adhesively connected to the positioning seat 231. The reset member 54, through its own torsional force, drives the rotating arm 52 to rotate the engaging block 53 away from the positioning seat 231.

[0057] Reference Figure 5 and Figure 6 The pull rope 55 is fixedly installed on the end of each set of rotating arms 52 away from the mounting shaft 51, and the cable rack 56 is fixedly installed on the side wall of the positioning seat 231. The end of each set of pull ropes 55 away from the rotating arm 52 passes through the cable rack 56 and the lifting plate 24 and is fixedly connected to the base 1.

[0058] Reference Figure 5 and Figure 6, when the lifting oil cylinder 25 drives the lifting plate 24 to drive the positioning seat 231 away from the base 1, the pulling rope 55 is gradually tightened and pulls the rotating arm 52 to rotate, so that the rotating arm 52 drives the clamping block 53 to rotate towards the positioning seat 231, and the clamping block 53 clamps and fixes the end of the test piece 10 inside the positioning seat 231.

[0059] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A vibration test bench for a shock absorber, characterized in that: The invention comprises a base (1) and a fixing frame (11) arranged on the base (1); a fixing assembly (2) for fixing a test piece (10) is arranged between the base (1) and the fixing frame (11); a frame (12) is arranged on a side of the fixing frame (11) away from the base (1); a clamping assembly (3) for clamping a test end (101) of the test piece (10) is arranged on the frame (12); and a lifting member (13) is arranged on the frame (12) for driving the clamping assembly (3) to perform high-frequency lifting and lowering movements; The fixing assembly (2) comprises a fixing block (21), a lifting plate (24), a lifting cylinder (25), a bearing seat (22) arranged on the base (1), and a positioning member (23) arranged on the bearing seat (22) for assisting in positioning the test piece (10); The positioning member (23) includes a positioning seat (231), a plug-in rod (232), an anti-slip plate (233) and a positioning rod (234); the positioning seat (231) is arranged at the end of the supporting seat (22) facing the lifting member (13), and the side wall of the positioning seat (231) is provided with a placement notch (2311) for facilitating the end of the test piece (10) away from the fixed block (21) to be pressed into; A pressing assembly (4) is provided on the positioning seat (231) for assisting in pressing and fixing the test piece (10); the pressing assembly (4) comprises a rotating shaft (41), a pressing rod (42), a pressing block (43), a torsion piece (44) and a linkage piece (45); the rotating shaft (41) is rotatably provided on the lifting plate (24), the pressing rod (42) is provided on the rotating shaft (41), and the pressing block (43) is provided when the pressing rod (42) is directed toward the positioning seat (231). 31), and the pressing block (43) is provided with a pressing groove (431) for the end of the test piece (10) to be pressed into; the torsion member (44) is arranged between the pressing rod (42) and the lifting plate (24) to drive the pressing rod (42) to move in a direction away from the positioning seat (231) through its own torsion force; the linkage member (45) is arranged on the lifting plate (24) to drive the pressing rod (42) to drive the pressing block (43) to approach the positioning seat (231).

2. The vibration test bench for a shock absorber according to claim 1, characterized in that: The fixed block (21) is arranged on the side wall of the fixed frame (11) facing the base (1); a passage (211) is provided on the fixed block (21) for the tested end (101) of the tested piece (10) to pass through; an expansion groove is provided on the inner side wall of the passage (211) for the tested piece (10) to be pressed into, and a clearance opening (212) is provided on the outer side wall of the fixed block (21) to facilitate the tested end (101) of the tested piece (10) to be pressed into the passage (211); the bearing seat (22) is located on the side wall of the base (1) facing the fixed block (21); the lifting plate (24) is provided on the side wall of the bearing seat (22) facing the base (1); and the lifting cylinder (25) is provided on the base (1) to drive the lifting plate (24) to approach or move away from the fixed block (21).

3. The vibration test bench for a shock absorber according to claim 2, characterized in that: The inner side wall of the placement notch (2311) is penetrated by a plug hole (2312), the plug rod (232) is inserted into the plug hole (2312), the anti-slip plate (233) is arranged at the end of the plug rod (232), and the side wall of the anti-slip plate (233) facing the plug rod (232) abuts against the inner side wall of the placement notch (2311); the positioning rod (234) is arranged on the side wall of the anti-slip plate (233) away from the plug rod (232) to penetrate the end of the test piece (10) away from the fixed block (21).

4. The vibration test bench for a shock absorber according to claim 1, characterized in that: The clamping assembly (3) comprises a mounting plate (31), a mounting block (32), two groups of clamping arms (33), a clamping block (34) and a driving member (35); the mounting plate (31) is arranged at the output end of the lifting member (13), and the mounting block (32) is arranged on the side wall of the mounting plate (31) away from the lifting member (13); the two groups of clamping arms (33) are both rotatably arranged at the end of the mounting block (32) facing the fixed frame (11), and the clamping arms (33) are relatively distributed at the ends of the mounting block (32). On both sides in the width direction; the clamping blocks (34) are arranged on the side walls of the two groups of clamping arms (33) facing each other, and the side walls of the two groups of clamping blocks (34) facing each other are both provided with clamping grooves (341) for the test end (101) of the test piece (10) to be pressed into; the side walls of the two clamping arms (33) away from each other are both inclined in the direction away from the clamping blocks (34), and the driving member (35) is arranged on the mounting plate (31) to drive the two groups of clamping blocks (34) to approach each other or move away from each other.

5. The vibration test bench for a shock absorber according to claim 4, characterized in that: The driving member (35) includes a driving frame (351), a driving cylinder (352), a rolling wheel (353) and a warping block (354); the driving frame (351) is slidably arranged outside the two groups of clamping arms (33), and the driving cylinder (352) is arranged between the driving frame (351) and the mounting plate (31) to drive the driving frame (351) to approach or move away from the mounting plate (31); the rolling wheel (353) is rotatably arranged inside the driving frame (351), and all the clamping arms (33) are located between the two groups of rolling wheels (353). The rolling wheels (353) and the clamping arms (33) are respectively arranged in a one-to-one correspondence, and each The side walls of the rolling wheels (353) facing the clamping arms (33) are in contact with the side walls of the corresponding clamping arms (33); the ends of the two groups of clamping arms (33) away from the mounting block (32) are extended in directions away from each other, and the distance between each clamping arm (33) and the corresponding rolling wheel (353) gradually decreases in the direction away from the mounting block (32); the warping blocks (354) are bent and arranged on the side walls of the two groups of clamping arms (33) away from each other, each of the warping blocks (354) is located at the end of the clamping arm (33) close to the mounting block (32), and each of the warping blocks (354) can be in contact with the corresponding rolling wheel (353).

6. The vibration test bench for a shock absorber according to claim 1, characterized in that: The linkage member (45) comprises a linkage block (451), a traction rope (452) and a guide wheel (453); the linkage block (451) is arranged on the pressing rod (42), the traction rope (452) is arranged on the linkage block (451), the guide wheel (453) is mounted on the lifting plate (24), and the end of the traction rope (452) away from the linkage block (451) passes through the guide wheel (453) and is connected to the base (1).

7. A vibration test bench for a shock absorber according to claim 1, characterized in that: The positioning seat (231) is provided with a clamping assembly (5) for clamping and fixing the test piece (10) on the positioning seat (231).

8. A vibration test bench for a shock absorber according to claim 7, characterized in that: The clamping assembly (5) comprises a mounting shaft (51), a rotating arm (52), a clamping block (53), a reset member (54), a pull rope (55) and a cable tie rack (56); the mounting shaft (51) is rotatably arranged on both sides of the width direction of the positioning seat (231); the rotating arm (52) is arranged on each set of mounting shafts (51); the clamping block (53) is arranged at the end of each set of rotating arms (52) away from the mounting shaft (51); and the clamping block (53) is located on the side wall of the rotating arm (52) facing the positioning seat (231); and the side walls on both sides of the width direction of the positioning seat (231) are penetrated by a recessed notch connected to the inside of the placement notch (2311). The opening (2313) is provided for the clamping block (53) to pass through, and the clamping block (53) is used to clamp and fix the test piece (10) inside the placement notch (2311); the reset member (54) is arranged between the rotating arm (52) and the positioning seat (231) to drive each group of rotating arms (52) to move in a direction away from the positioning seat (231) through its own torque; the pull rope (55) is arranged at the end of each group of rotating arms (52) away from the installation shaft (51), and the cable rack (56) is arranged on the positioning seat (231), and the end of each pull rope (55) away from the rotating arm (52) passes through the cable rack (56) and is connected to the base (1).

9. A testing method for a vibration test bench for a shock absorber according to any one of claims 1-8, characterized in that: The steps include: Loading: The fixing component (2) fixes the test piece (10) on the fixing frame (11) to realize the loading of the test piece (10); Clamping: The clamping assembly (3) clamps and fixes the end to be tested (101) of the fixed piece to be tested (10); Testing: The lifting member (13) drives the clamping assembly (3) to drive the end to be tested (101) of the tested object (10) to move up and down at high frequency to perform vibration testing.

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