A device and method for testing the life of a car bushing

Abstract

The application discloses a kind of automobile bushing life test device and test method, it is related to automobile bushing test technical field, to solve the technical problem that existing compression-torsion testing machine is difficult to test out the instantaneous impact that bushing is subjected to in actual working condition and the influence of life attenuation, including base, the top of base is arranged with multiple compression-torsion test components, the top of base is connected with support frame, multiple impact test components are arranged on support frame, and the impact test component includes impact column, support frame top is arranged with progressive drive component, multiple transmission components are arranged below progressive drive component, and the transmission component includes transmission rod, and multiple drive columns are connected to the circumferential outer wall of transmission rod, and progressive drive component can drive multiple transmission rods to be progressively lifted, and stroke adjusting mechanism is arranged on the side of impact test component, and the stroke adjusting mechanism includes adjusting block.The application has the advantages that instantaneous impact that bushing is subjected to in actual working condition can be simulated.

Description

Technical Field

[0001] This invention relates to the field of automotive bushing testing technology, and more specifically, to an automotive bushing life testing device and testing method. Background Technology

[0002] The suspension system of a car has the most bushings and the most complex operating conditions. In the suspension system, bushings are elastic buffer elements that connect key components such as suspension control arms, frame, and steering knuckles. They are mostly made of rubber, polyurethane, or composite elastic materials. Their function is to ensure stable connection of suspension components, absorb road bumps and impacts, suppress metal impact noise, and filter vibrations transmitted to the vehicle body to improve ride comfort.

[0003] In existing technologies, bushings are typically tested using a compression-torsion testing machine. This machine is a specialized testing device used to simulate the combined load state of bushings under actual working conditions, where they simultaneously bear axial pressure and radial torque, thereby detecting their mechanical properties, structural strength, and durability. However, in reality, when vehicles drive over potholes, crush stones, or speed bumps, the impact load on the bushings is instantaneous. Existing compression-torsion testing machines struggle to reproduce such pulsed impacts, resulting in significant deviations between the test conditions and actual service environments. Consequently, they cannot effectively capture the true failure mechanism and life decay law of bushings under impact loads. Therefore, we propose an automotive bushing life testing device and method. Summary of the Invention

[0004] The purpose of this invention is to provide an automotive bushing life testing device and method to solve the technical problem that existing compression and torsion testing machines are unable to test the impact of instantaneous impacts on bushing life attenuation under actual working conditions.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an automotive bushing life testing device, comprising a base, a plurality of compression and torsion testing components arranged on the top of the base, a support frame connected to the top of the base, a plurality of impact testing components arranged on the support frame, each impact testing component including an impact column; a successive drive assembly arranged on the top of the support frame, a plurality of transmission assemblies arranged below the successive drive assembly, each transmission assembly including a transmission rod, a plurality of drive columns connected to the outer circumference of the transmission rod, the transmission rod being used to drive the impact column upward and release the impact column to impact downward; the successive drive assembly is capable of Multiple transmission rods are driven to rise and fall sequentially, causing the multiple impact columns to form a sequential instantaneous impact state. A stroke adjustment mechanism is arranged on the side of the impact test assembly. The stroke adjustment mechanism includes an adjustment block. The adjustment block has a guide hole from top to bottom. The inner wall of the guide hole has multiple guide grooves. The guide grooves are composed of a lower vertical groove, a turning groove, and an upper vertical groove. The transmission rod is slidably arranged in the guide hole, and the drive column is movably arranged in the guide groove. When the drive column slides from the lower vertical groove to the turning groove, the drive column can drive the transmission rod to rotate, causing the transmission rod to release the impact column to impact downward.

[0006] Preferably, the plurality of the compression and torsion test components are arranged in a ring array, and the compression and torsion test components include a horizontal clamping member and a vertical clamping member; the vertical clamping member includes a lower clamping block and an upper clamping block, the top of the upper clamping block is integrally formed with a pressure receiving block, the pressure receiving block is arranged below the impact column, the pressure receiving block is used to receive the instantaneous impact of the impact column and transmit the pressure to the vehicle suspension bushing.

[0007] Preferably, the multiple impact test components are arranged in a circular array. Each impact test component includes a fixed plate disposed on the side wall of the support frame, a guide frame connected to the side wall of the fixed plate, and multiple guide grooves formed on the side wall of the guide frame. The impact column is slidably disposed in the inner cavity of the guide frame. A spring is sleeved on the outer circumference of the impact column, and a fixed circular plate is also connected to the outer circumference of the impact column. The spring is disposed between the fixed circular plate and the inner top of the guide frame. Multiple guide blocks are integrally formed on the side wall of the fixed circular plate, and sliders are integrally formed on the side wall of the guide blocks. The sliders are slidably disposed in the guide grooves, and the guide blocks make contact with the inner side wall of the guide frame to ensure the verticality of the impact column's vertical movement. A rotating cylinder is rotatably connected to the upper side wall of the impact column, multiple toothed plates are disposed on the outer side wall of the guide frame, and a slide rail is disposed on the other outer side wall of the guide frame.

[0008] Preferably, the multiple transmission components are arranged in a circular array, and the transmission components further include multiple lifting rods. An adaptation plate is rotatably arranged on the top of the lifting rod, and multiple guide wheels are arranged on the side wall of the adaptation plate. Multiple fixed cylinders are connected to the side wall of the support frame, and the lifting rod is slidably arranged in the inner cavity of the fixed cylinder. The bottom of the lifting rod is rotatably connected to the top of the transmission rod.

[0009] Preferably, a support plate is connected to the upper side wall of the transmission rod, and a release plate is integrally formed on the side wall of the support plate. The side wall of the release plate has a groove, and the top of the release plate has multiple extrusion grooves. An extrusion plate is slidably arranged in the extrusion grooves. The bottom of the extrusion plate is set as an inclined structure. The bottom of the extrusion plate is connected to a second spring through a connecting block. The other end of the second spring is connected to the side wall of the release plate. The groove is used to provide a moving channel for the rotating drum. When the release plate moves downward from above the rotating drum, the rotating drum can pass through the groove and extrude the inclined structure at the bottom of the extrusion plate to enter the top of the extrusion plate. At this time, the extrusion plate provides support for the rotating drum.

[0010] Preferably, the sequential drive assembly includes a rotating column rotatably arranged on the top of the support frame and a rotary motor mounted on the side wall of the support frame. The output end of the rotary motor is connected to a gear. The outer circumference of the rotating column is provided with teeth, and the gear meshes with the teeth. The outer circumference of the rotating column is connected to an inclined inner circular frame via multiple connecting rods. The inclined inner circular frame is connected to an inclined outer circular frame via a connecting ring plate. A circular guide groove, an upper circular sliding groove, and a lower circular sliding groove are formed between the inclined inner circular frame and the inclined outer circular frame. The upper circular sliding groove and the lower circular sliding groove are connected through the circular guide groove. The adapting plate is movably arranged in the circular guide groove, wherein multiple guide wheels are rotatably arranged in the upper circular sliding groove, and another multiple guide wheels are rotatably arranged in the lower circular sliding groove.

[0011] Preferably, the rotation axis of the rotating column is vertical, and the inclined inner circular frame and the inclined outer circular frame are inclined at an angle in the horizontal direction. When the rotating column drives the inclined inner circular frame and the inclined outer circular frame to rotate, the inclined inner circular frame and the inclined outer circular frame form a periodic inclined oscillating rotation state.

[0012] Preferably, a support plate is connected to the side wall of the adjusting block, and a sliding plate is arranged on the side wall of the support plate. The sliding plate is slidably engaged with the slide rail on the outer side wall of the guide frame. A worm gear is rotatably arranged on the side wall of the adjusting block, and multiple gears are coaxially connected to the worm gear. A worm is rotatably arranged on the other side wall of the adjusting block, and a handwheel is coaxially connected to the worm. The worm meshes with the worm gear, and the gears mesh with the toothed plate on the outer side wall of the guide frame.

[0013] A test method for an automotive bushing life testing device includes the following steps:

[0014] S1. Clamping and fixing operation: The inner cavity of the car suspension bushing is interference-fitted with the test shaft, and then the test shaft is clamped and fixed by the horizontal clamping member. Then the outer wall of the car suspension bushing is clamped by the lower and upper clamping blocks of the vertical clamping member. Multiple car suspension bushings are clamped and fixed in this way.

[0015] S2. Compression and Torque Test Operation: The reciprocating rotation of the horizontal clamping member drives the test shaft to reciprocate, forming a state of applying reciprocating torque to the vehicle suspension bushing. At the same time, the downward movement of the vertical clamping member forms a state of applying continuous pressure to the vehicle suspension bushing.

[0016] S3. Under pressure-torsion conditions, an instantaneous impact test is performed. Maintaining the pressure-torsion test state, multiple transmission rods are driven by the sequential drive assembly to perform sequential lifting and lowering movements. Simultaneously, the drive column on the outer circumference of the transmission rod moves upward along the lower vertical groove. At the same time, the transmission rod drives the release plate to rise synchronously. The release plate supports the rotating cylinder at the top of the impact column through the compression plate, pulling the impact column upward along with the transmission rod. During the upward movement of the impact column, spring one is in a compressed, stored state. When the drive column slides along the lower vertical groove to the turning groove, guided by the trajectory of the turning groove, the drive column drives the transmission rod to rotate around its own axis. The transmission rod then drives the release plate to rotate synchronously. After the release plate rotates, the support relationship between the compression plate and the rotating cylinder is released. Under the elastic restoring force of spring one, the impact column slides rapidly downward along the inner cavity of the guide frame, its bottom directly impacting the pressure block. The pressure block transmits the instantaneous impact force to the clamped automotive suspension bushing, completing the instantaneous impact action. Multiple transmission components, under the action of the sequential drive assembly, achieve alternating movements, causing multiple impact columns to form continuous, sequential instantaneous impacts on the corresponding automotive suspension bushings.

[0017] S4. Under the same compression and torsion conditions, perform impact tests with different instantaneous impact forces. Keep multiple automotive suspension bushings in the state of compression and torsion testing. Change the impact stroke of the impact column through the stroke adjustment mechanism to achieve loading tests with different instantaneous impact forces.

[0018] Specifically, the adjustment of the impact stroke and the application of different impact forces are achieved through the following steps:

[0019] S4.1 Impact stroke adjustment operation: The operator turns the handwheel, which drives the worm to rotate. The worm wheel rotates with the worm and drives the second gear to roll on the tooth plate, thereby driving the adjustment block to move in the vertical direction, thus changing the height position of the turning groove in the guide groove of the adjustment block.

[0020] S4.2 Different impact force loading tests: When the height of the turning groove is adjusted upward, the stroke of the drive column sliding along the lower vertical groove to the turning groove increases, and the height of the impact column driven by the transmission rod increases accordingly, resulting in a greater instantaneous downward impact force of the impact column; when the height of the turning groove is adjusted downward, the height of the impact column driven by the drive column decreases, and the instantaneous downward impact force of the impact column decreases; by adjusting the height of the turning groove of multiple stroke adjustment mechanisms to multiple different heights, impact tests with different instantaneous impact forces can be performed on multiple automotive suspension bushings under the same pressure and torque conditions.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. This invention designs multiple impact test components, successive drive components, and multiple transmission components. First, the pressure and torque test components apply pressure and torque to the automotive suspension bushing to achieve a composite loading test. Then, the successive drive components are activated, causing the transmission rods of multiple transmission components to rise and fall sequentially along the guide holes on the adjusting block. During the rise of the transmission rods, the impact column of the impact test components can be raised and released at a certain height, causing the impact column to apply an instantaneous impact to the automotive suspension bushing. Through the successive rise and fall of multiple transmission rods, multiple impact columns form a successive instantaneous impact state, enabling the automotive suspension bushing to undergo instantaneous impact testing under continuous pressure and torque composite test conditions. This can simulate the instantaneous impact experienced by the bushing in real-world scenarios such as vehicles driving over potholes, crushing stones, or rapidly passing over speed bumps. The invention tests the changes in the mechanical properties of the bushing under composite dynamic loads, the accumulation of structural damage, and the law of lifespan decay, providing more realistic test data support for the durability design and quality assessment of the bushing.

[0023] 2. This invention designs an inclined inner and outer circular frame with an inclined state in the successive drive assembly. The inclined inner and outer circular frames can form a periodic inclined oscillating rotation state during rotation. The resulting track provides periodic lifting and lowering guidance to the guide wheel, thereby driving the adaptation plate and the transmission rods of multiple associated transmission components to achieve successive lifting and lowering movements. Multiple transmission rods drive multiple impact columns to perform successive lifting and lowering movements. This eliminates the need for a separate drive mechanism for each impact column, allowing multiple impact columns to create continuous, successive instantaneous impacts on multiple automotive suspension bushings. This avoids the energy waste caused by configuring separate drive mechanisms for each impact column. Simultaneously, the successive impacts of multiple impact columns disperse the impact load, preventing simultaneous impacts from easily causing excessive impact force on the entire device.

[0024] 3. This invention utilizes multiple guide grooves on the inner wall of the guide hole of the adjusting block, designing the guide grooves as a structural path composed of a lower vertical groove, a turning groove, and an upper vertical groove. When the sequentially driven component drives the transmission rod to rise along the guide hole, the drive column first slides vertically upward along the lower vertical groove. The vertical structure of the lower vertical groove ensures that there is no additional rotational offset during the rise of the transmission rod, allowing the transmission rod to stably drive the release plate to rise synchronously. Then, the extrusion plate reliably supports the rotating cylinder at the top of the impact column, achieving a smooth rise of the impact column. When the drive column slides to the top of the lower vertical groove and enters the turning groove, the arc-shaped turning path of the turning groove generates a lateral guiding force on the drive column, forcing the drive column to drive the transmission rod to rotate around its own axis. This rotational action is directly transmitted to the release plate on the transmission rod, causing the release plate to rotate synchronously, thereby releasing the support relationship between the extrusion plate and the rotating cylinder, allowing the impact column to quickly impact downward, completing the instantaneous impact action. The guide grooves realize the rising and falling action of the impact column, and the entire process does not require manual intervention or additional program control, greatly improving the continuity of the test.

[0025] 4. In this invention, the operator rotates the handwheel of the stroke adjustment mechanism, which drives the coaxially connected worm gear to rotate. Because the worm gear meshes with the worm wheel on the side wall of the adjustment block, the worm wheel rotates with the worm gear and drives the coaxially connected gear two to rotate synchronously. Furthermore, because gear two meshes with the toothed plate on the outer side wall of the guide frame, and the adjustment block slides with the guide frame's slide rail through the support plate and slide plate, the rotation of gear two is converted into the adjustment block moving vertically along the slide rail. This changes the height of the turning groove in the guide groove of the adjustment block. The height of the turning groove determines the stroke node when the drive column drives the transmission rod to release the impact column, ultimately realizing the adjustment of the impact column's impact stroke. This provides conditions for testing different instantaneous impact forces, and the operation is simple and convenient. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 This is a schematic diagram of the compression and torsion test assembly of the present invention.

[0028] Figure 3 This is a schematic diagram of the top structure of the compression and torsion test assembly of the present invention.

[0029] Figure 4 This is a schematic diagram of the disassembled structure of the compression and torsion test assembly of the present invention.

[0030] Figure 5 This is a schematic diagram of the support frame structure of the present invention.

[0031] Figure 6 This is a schematic diagram of the successive drive component split structure of the present invention.

[0032] Figure 7This is a second-view schematic diagram of the split structure of the successive drive component of the present invention.

[0033] Figure 8 This is a schematic diagram of the overall structure of the impact testing assembly, transmission assembly, and stroke adjustment mechanism of the present invention.

[0034] Figure 9 This is a schematic diagram showing the disassembled structure of the impact testing assembly, transmission assembly, and stroke adjustment mechanism of the present invention.

[0035] Figure 10 This is a schematic diagram of the stroke adjustment mechanism of the present invention.

[0036] Figure 11 This is a schematic diagram of the transmission component structure of the present invention.

[0037] Figure 12 This is a schematic diagram of the impact column structure of the present invention.

[0038] Figure 13 This is a schematic diagram of the release plate structure of the present invention.

[0039] Figure 14 This is a schematic diagram of the disassembled structure of the release plate and the compression plate of the present invention.

[0040] Figure 15 This is a schematic diagram of the cross-sectional structure of the adjustment block of the present invention.

[0041] Figure 16 This is a second-view schematic diagram of the cross-sectional structure of the adjustment block of the present invention.

[0042] Explanation of the labels in the diagram:

[0043] 1. Base; 2. Compression and Torsion Test Assembly; 3. Support Frame; 4. Impact Test Assembly; 5. Successive Drive Assembly; 6. Transmission Assembly; 7. Stroke Adjustment Mechanism; 8. Automotive Suspension Bushing;

[0044] 21. Horizontal clamping component; 22. Vertical clamping component; 23. Test shaft;

[0045] 2101. First clamping component; 2102. Second clamping component; 2103. Bevel gear one; 2104. Bevel gear two; 2105. Reciprocating motor; 2201. Lower clamping block; 2202. Upper clamping block; 2203. Pressure block; 2204. Cylinder;

[0046] 301. Fixed cylinder; 401. Impact column; 402. Fixed plate; 403. Guide frame; 404. Guide groove; 405. Spring 1; 406. Fixed circular plate; 407. Guide block; 408. Slider; 409. Rotary cylinder; 410. Toothed plate; 411. Slide rail;

[0047] 501. Rotating column; 502. Rotary motor; 503. Gear 1; 504. Toothed edge; 505. Connecting rod; 506. Inclined inner circular frame; 507. Connecting ring plate; 508. Inclined outer circular frame; 509. Circular guide groove; 510. Upper circular slide groove; 511. Lower circular slide groove;

[0048] 601. Transmission rod; 602. Drive column; 603. Lifting rod; 604. Adaptive plate; 605. Guide wheel; 606. Support plate; 607. Release plate; 608. Groove; 609. Extrusion groove; 610. Extrusion plate; 611. Connecting block; 612. Spring II;

[0049] 701. Adjusting block; 702. Guide hole; 703. Guide groove; 7031. Lower vertical groove; 7032. Turning groove; 7033. Upper vertical groove; 704. Support plate; 705. Slide plate; 706. Worm gear; 707. Gear II; 708. Worm; 709. Handwheel. Detailed Implementation

[0050] Example 1, as Figures 1 to 16 As shown, this embodiment provides an automotive bushing life testing device, including a base 1. Multiple compression-torsion test components 2 are arranged on the top of the base 1. The compression-torsion test components 2 are used to perform a combined pressure and torque loading test on the automotive suspension bushing 8. A support frame 3 is connected to the top of the base 1. Multiple impact test components 4 are arranged on the support frame 3. The impact test components 4 are arranged above the compression-torsion test components 2. The impact test components 4 include an impact column 401, which is used to apply an instantaneous impact to the automotive suspension bushing 8.

[0051] Specifically, a sequential drive assembly 5 is arranged on the top of the support frame 3, and multiple transmission assemblies 6 are arranged below the sequential drive assembly 5. The transmission assemblies 6 are arranged on the side of the impact test assembly 4. The transmission assembly 6 includes a transmission rod 601, and multiple drive columns 602 are connected to the outer circumference of the transmission rod 601. The transmission rod 601 is used to drive the impact column 401 to rise and release the impact column 401 to impact downward. The sequential drive assembly 5 can drive multiple transmission rods 601 to rise and fall sequentially, so that multiple impact columns 401 form a sequential instantaneous impact state. A stroke adjustment mechanism 7 is arranged on the side of the impact test assembly 4. The stroke adjustment mechanism 7 includes an adjustment block 701. The adjustment block 701 has a guide hole 702 from top to bottom, and the transmission rod 601 is slidably arranged in the guide hole 702.

[0052] This invention designs multiple impact test components 4, successive drive components 5, and multiple transmission components 6. First, the pressure and torque test component 2 applies pressure and torque to the automotive suspension bushing 8 to achieve a composite loading test. Then, the successive drive component 5 is activated, causing the transmission rods 601 of the multiple transmission components 6 to rise and fall sequentially along the guide holes 702 on the adjusting block 701. During the ascent of the transmission rods 601, the impact pins 401 of the impact test component 4 rise, and at a certain height, the impact pins 401 are released, causing them to strike the automotive suspension bushing 8 downwards. The bushing 8 applies instantaneous impact, and through the successive raising and lowering of multiple transmission rods 601, multiple impact columns 401 form a successive instantaneous impact state. This enables the automotive suspension bushing 8 to undergo instantaneous impact testing under continuous compression and torsion combined test conditions. It can simulate the instantaneous impact experienced by the bushing in real-world scenarios such as vehicles driving over potholes, crushing stones, or rapidly passing over speed bumps. The test can reveal the changes in the mechanical properties of the bushing under combined dynamic loads, the accumulation of structural damage, and the law of lifespan decay. This provides more realistic test data support for the durability design and quality assessment of the bushing.

[0053] In an embodiment of the present invention, multiple compression and torsion test components 2 are arranged in a ring array. The compression and torsion test components 2 include a horizontal clamping member 21 and a vertical clamping member 22. The horizontal clamping member 21 is used to clamp the test shaft 23 that is interference-connected in the inner cavity of the automobile suspension bushing 8. The torque test of the automobile suspension bushing 8 is realized by the reciprocating rotation of the horizontal clamping member 21.

[0054] The horizontal clamping member 21 includes a first clamping member 2101 and a second clamping member 2102. Both the first clamping member 2101 and the second clamping member 2102 are rotatably arranged on the top of the base 1. The second clamping member 2102 is coaxially connected to a bevel gear 2103, and the bevel gear 2103 is meshed with a bevel gear 2104. A reciprocating motor 2105 is arranged in the inner cavity of the base 1, and the output end of the reciprocating motor 2105 is connected to the bevel gear 2104. When the reciprocating motor 2105 reciprocates, it can drive the bevel gear 2104 to reciprocate. The bevel gear 2104 drives the second clamping member 2102 to reciprocate through the bevel gear 2103, thereby realizing the reciprocating rotation of the horizontal clamping member 21 and realizing the torque test of the automobile suspension bushing 8.

[0055] It is worth noting that the vertical clamping member 22 includes a lower clamping block 2201 and an upper clamping block 2202. The top of the upper clamping block 2202 is integrally formed with a pressure-bearing block 2203. The lower clamping block 2201 and the upper clamping block 2202 are used to clamp the outer wall of the automotive suspension bushing 8. By moving the vertical clamping member 22 downward, continuous pressure is applied to the automotive suspension bushing 8, forming a pressure test on the automotive suspension bushing 8. The pressure-bearing block 2203 is arranged on the impact column. Below 401, the pressure block 2203 is used to receive the instantaneous impact of the impact column 401 and transmit the pressure to the vehicle suspension bushing 8; there are also multiple cylinders 2204 arranged in the inner cavity of the base 1. The output end of the cylinder 2204 is connected to the bottom of the lower clamping block 2201. By the contraction movement of the output end of the cylinder 2204, the lower clamping block 2201 can be driven to move downward, thereby realizing the downward movement of the vertical clamping member 22 and applying continuous pressure to the vehicle suspension bushing 8.

[0056] In an embodiment of the present invention, multiple impact test components 4 are arranged in a ring array. The impact test component 4 includes a fixed plate 402 arranged on the side wall of the support frame 3. A guide frame 403 is connected to the side wall of the fixed plate 402. Multiple guide grooves 404 are provided on the side wall of the guide frame 403. An impact column 401 is slidably arranged in the inner cavity of the guide frame 403. A spring 405 is sleeved on the outer circumference of the impact column 401. A fixed circular plate 406 is also connected to the outer circumference of the impact column 401. The spring 405 is arranged between the fixed circular plate 406 and the top of the guide frame 403. Multiple guide blocks 407 are integrally formed on the side wall of the fixed circular plate 406. A slider 408 is integrally formed on the side wall of the guide block 407. The slider 408 is slidably arranged in the guide grooves 404. The guide blocks 407 and the inner side wall of the guide frame 403 form contact sliding to ensure the verticality of the impact column 401 in the vertical direction. A rotating cylinder 409 is rotatably connected to the upper side wall of the impact column 401. Multiple toothed plates 410 are arranged on the outer side wall of the guide frame 403, and a slide rail 411 is arranged on the other outer side wall of the guide frame 403. When the transmission assembly 6 drives the impact column 401 to move, the impact column 401 slides along the inner cavity of the guide frame 403. During the sliding process, the fixed circular plate 406 on the outer circumference of the impact column 401 moves synchronously. Because the spring 405 is arranged between the fixed circular plate 406 and the inner top of the guide frame 403, the fixed circular plate 406 will compress or release the spring 405. The elastic force of the spring 405 provides power for the subsequent instantaneous impact of the impact column 401. Simultaneously, the guide block 407 on the side wall of the fixed circular plate 406 contacts and slides against the inner side wall of the guide frame 403. The slider 408 on the side wall of the guide block 407 slides along the guide groove 404 on the side wall of the guide frame 403. The two work together to ensure the verticality of the impact column 401's vertical movement, preventing the impact column 401 from deviating and affecting the impact accuracy.

[0057] In an embodiment of the present invention, multiple transmission components 6 are arranged in a ring array. The transmission components 6 also include multiple lifting rods 603. An adaptation plate 604 is rotatably arranged on the top of the lifting rod 603, and multiple guide wheels 605 are arranged on the side wall of the adaptation plate 604. Multiple fixed cylinders 301 are connected to the side wall of the support frame 3. The lifting rod 603 is slidably arranged in the inner cavity of the fixed cylinder 301, and the bottom of the lifting rod 603 is rotatably connected to the top of the transmission rod 601. A support plate 606 is connected to the upper side wall of the transmission rod 601. A release plate 607 is integrally formed on the side wall of the support plate 606. A groove 608 is provided on the side wall of the release plate 607. Multiple extrusion grooves 609 are provided on the top of the release plate 607. An extrusion plate 610 is slidably arranged in the extrusion grooves 609. The bottom of the extrusion plate 610 is set as a slope structure. A spring 612 is connected to the bottom of the extrusion plate 610 through a connecting block 611. The other end of the spring 612 is connected to the side wall of the release plate 607. The groove 608 is used to provide an active channel for the rotating drum 409. When the release plate 607 moves downward from above the rotating drum 409, the rotating drum 409 can pass through the groove 608 and be squeezed into the slope structure at the bottom of the extrusion plate 610 to enter the top of the extrusion plate 610. At this time, the extrusion plate 610 provides support for the rotating drum 409.

[0058] In this invention, the bottom of the lifting rod 603 is rotatably connected to the top of the transmission rod 601. The sliding of the lifting rod 603 will synchronously drive the transmission rod 601 to rise and fall. The release plate 607 on the transmission rod 601 also moves synchronously. When the release plate 607 moves downward from above the rotating cylinder 409, the rotating cylinder 409 passes through the groove 608 on the side wall of the release plate 607 and is simultaneously pressed against the inclined structure at the bottom of the extrusion plate 610. After being pressed, the extrusion plate 610 slides along the extrusion groove 609 and stretches the second spring 612. Once the rotating drum 409 enters the top of the extrusion plate 610, the second spring 612 resets and pushes the extrusion plate 610 back, allowing it to enter the bottom of the rotating drum 409 and provide support. At this point, the transmission rod 601 rises, which, through the release plate 607 and the extrusion plate 610, drives the rotating drum 409 and the impact column 401 to rise. Subsequently, as the transmission rod 601 rotates, the release plate 607 rotates synchronously, releasing the support relationship between the extrusion plate 610 and the rotating drum 409, thus releasing the impact column 401. The groove 608 on the side wall of the release plate 607 provides clearance for component movement, preventing motion interference.

[0059] In an embodiment of the present invention, the sequential drive assembly 5 includes a rotating column 501 rotatably arranged on the top of the support frame 3 and a rotary motor 502 installed on the side wall of the support frame 3. The output end of the rotary motor 502 is connected to a gear 503. The outer circumferential wall of the rotating column 501 is provided with a toothed edge 504, and the gear 503 meshes with the toothed edge 504. The outer circumferential wall of the rotating column 501 is connected to an inclined inner circular frame 506 through a plurality of connecting rods 505. The inclined inner circular frame 506 is connected to an inclined outer circular frame 508 through a connecting ring plate 507. A circular guide groove 509 is formed between the inclined inner circular frame 506 and the inclined outer circular frame 508. An upper circular sliding groove 510 and a lower circular guide groove 509 are also provided. The upper and lower circular grooves 510 and 511 are connected by a circular guide groove 509. The rotation axis of the rotating column 501 is vertical. The inclined inner circular frame 506 and the inclined outer circular frame 508 are inclined at an angle in the horizontal direction. When the rotating column 501 drives the inclined inner circular frame 506 and the inclined outer circular frame 508 to rotate, the inclined inner circular frame 506 and the inclined outer circular frame 508 form a periodic inclined swing rotation state. The adapting plate 604 is movably arranged in the circular guide groove 509, wherein multiple guide wheels 605 are rolled in the upper circular groove 510 and multiple other guide wheels 605 are rolled in the lower circular groove 511.

[0060] Furthermore, when the sequential drive assembly 5 operates, the rotary motor 502 drives the gear 503 to rotate, and the gear 503 drives the rotating column 501 to rotate around the vertical rotation axis through the toothed end 504; when the rotating column 501 rotates, its outer circumference drives the inclined inner circular frame 506 to rotate synchronously through multiple connecting rods 505; since the inclined inner circular frame 506 is connected to the inclined outer circular frame 508 through the connecting ring plate 507, the inclined outer circular frame 508 rotates together with the inclined inner circular frame 506; since the inclined inner circular frame 506 and the inclined outer circular frame 508 are inclined at an angle in the horizontal direction, they form a periodic inclined oscillating rotation state during their rotation; the inclined inner circular frame 506... The circular guide groove 509, upper circular slide groove 510, and lower circular slide groove 511 formed between the frame 506 and the inclined outer circular frame 508 constitute a transmission track. The adapting plate 604 is movably arranged in the circular guide groove 509, and multiple guide wheels 605 on the side wall of the adapting plate 604 are respectively rolled in the upper circular slide groove 510 and the lower circular slide groove 511. When the inclined inner circular frame 506 and the inclined outer circular frame 508 periodically tilt, swing, and rotate, the track they form generates a periodic lifting and lowering guide effect on the guide wheels 605, thereby driving the adapting plate 604 and its associated transmission components 6 to achieve successive lifting and lowering actions, providing a power basis for the successive impacts of the subsequent impact column 401.

[0061] This invention designs an inclined inner circular frame 506 and an inclined outer circular frame 508 with an inclined state in the successive drive assembly 5. During the rotation of the inclined inner circular frame 506 and the inclined outer circular frame 508, they can form a periodic inclined oscillating rotation state. The track formed by them generates a periodic lifting and lowering guide effect on the guide wheel 605, thereby driving the adaptation plate 604 and the transmission rods 601 of the multiple transmission assemblies 6 associated with it to achieve successive lifting and lowering actions. The multiple transmission rods 601 drive multiple impact columns 401 to perform successive lifting and lowering actions. It is not necessary to configure a separate drive mechanism for each impact column 401. Multiple impact columns 401 can form continuous and successive instantaneous impacts on multiple automotive suspension bushings 8. This avoids the energy waste caused by configuring separate drive mechanisms for multiple impact columns 401. At the same time, the successive impact of multiple impact columns 401 disperses the impact load and avoids the large impact force that can easily be caused to the entire device by simultaneous impact.

[0062] In an embodiment of the present invention, a plurality of guide grooves 703 are provided on the inner sidewall of the guide hole 702. The guide groove 703 is composed of a lower vertical groove 7031, a turning groove 7032 and an upper vertical groove 7033. The drive column 602 is movably arranged in the guide groove 703. When the drive column 602 slides from the lower vertical groove 7031 to the turning groove 7032, the drive column 602 can drive the transmission rod 601 to rotate, so that the transmission rod 601 releases the impact column 401 to impact downward. The height of the turning groove 7032 can be adjusted to change the impact stroke of the impact column 401.

[0063] This invention utilizes multiple guide grooves 703 formed on the inner wall of the guide hole 702 of the adjusting block 701. These guide grooves 703 are designed as a structural path consisting of a lower vertical groove 7031, a turning groove 7032, and an upper vertical groove 7033. When the sequential driving assembly 5 drives the transmission rod 601 to rise along the guide hole 702, the driving rod 602 first slides vertically upward along the lower vertical groove 7031. The vertical structure of the lower vertical groove 7031 ensures that there is no additional rotational offset during the upward movement of the transmission rod 601, allowing the transmission rod 601 to stably drive the release plate 607 to rise synchronously. This, in turn, reliably supports the rotating cylinder 409 at the top of the impact column 401 through the pressing plate 610, thus achieving the smooth operation of the impact column 401. As the drive column 602 slides to the top of the lower vertical groove 7031 and enters the turning groove 7032, the arc-shaped turning path of the turning groove 7032 generates a lateral guiding force on the drive column 602, forcing the drive column 602 to drive the transmission rod 601 to rotate around its own axis. This rotational action is directly transmitted to the release plate 607 on the transmission rod 601, causing the release plate 607 to rotate synchronously, thereby releasing the support relationship between the compression plate 610 and the rotating cylinder 409, allowing the impact column 401 to quickly impact downwards and complete the instantaneous impact action. The upward and downward impact actions of the impact column 401 are realized by using the guide groove 703. The entire process does not require manual intervention or additional program control, which greatly improves the continuity of the test.

[0064] Furthermore, a support plate 704 is connected to the side wall of the adjusting block 701, and a sliding plate 705 is arranged on the side wall of the support plate 704. The sliding plate 705 is slidably engaged with the slide rail 411 on the outer side wall of the guide frame 403. A worm gear 706 is rotatably arranged on the side wall of the adjusting block 701. Multiple gears 707 are coaxially connected to the worm gear 706. A worm 708 is rotatably arranged on the other side wall of the adjusting block 701. A handwheel 709 is coaxially connected to the worm 708. The worm 708 is meshed with the worm gear 706. The gears 707 are meshed with the toothed plate 410 on the outer side wall of the guide frame 403.

[0065] In this invention, the operator rotates the handwheel 709 of the stroke adjustment mechanism 7, which drives the coaxially connected worm gear 708 to rotate. Because the worm gear 708 meshes with the worm wheel 706 on the side wall of the adjusting block 701, the worm wheel 706 rotates with the worm gear 708 and drives the coaxially connected gear 707 to rotate synchronously. Furthermore, because the gear 707 meshes with the toothed plate 410 on the outer side wall of the guide frame 403, and the adjusting block 701 slides with the guide frame 403 via the support plate 704 and the sliding plate 705, the gear... The rotation of 707 will be converted into the vertical movement of the adjusting block 701 along the slide rail 411, thereby changing the height position of the turning groove 7032 in the guide groove 703 inside the adjusting block 701. The height of the turning groove 7032 determines the stroke node when the drive column 602 drives the transmission rod 601 to release the impact column 401, thus realizing the adjustment of the impact stroke of the impact column 401. This provides conditions for testing different instantaneous impact forces, and the operation is simple and convenient, solving the problem that adjusting the impact force of the impact column 401 is relatively troublesome.

[0066] Example 2: This example provides a test method for an automotive bushing life testing device, including the following steps:

[0067] S1. Clamping and fixing operation: The inner cavity of the automobile suspension bushing 8 is interference-fitted with the test shaft 23. Then, the test shaft 23 is clamped and fixed by the horizontal clamping member 21. Then, the outer wall of the automobile suspension bushing 8 is clamped by the lower clamping block 2201 and the upper clamping block 2202 of the vertical clamping member 22. In this way, multiple automobile suspension bushings 8 are clamped and fixed respectively.

[0068] S2. The compression and torsion test operation is carried out by the reciprocating rotation of the horizontal clamp 21, which drives the test shaft 23 to reciprocate, thus forming a state of applying reciprocating torque to the automobile suspension bushing 8. At the same time, the downward movement of the vertical clamp 22 forms a state of applying continuous pressure to the automobile suspension bushing 8.

[0069] S3. Under pressure and torsion conditions, an instantaneous impact test is performed. Maintaining the pressure and torsion test state, the rotary motor 502 drives gear 503 to rotate, which in turn drives the rotating column 501 to rotate. This causes the inclined inner circular frame 506 and the inclined outer circular frame 508 to form a periodic tilting and oscillating rotational state. During this process, the adapting plate 604 rolls within the inclined track structure composed of the circular guide groove 509, the upper circular sliding groove 510, and the lower circular sliding groove 511 via the guide wheel 605. The inclined track structure provides periodic lifting and lowering guidance to the guide wheel 605, thereby driving the adapting plate 604 and the connected lifting rod 603 to perform successive lifting and lowering movements along the inner cavity of the fixed cylinder 301. The lifting and lowering action of the lifting rod 603 synchronously drives the bottom to rotate. The connected transmission rod 601 slides along the guide hole 702 of the stroke adjustment mechanism 7. At this time, the drive column 602 on the outer circumference of the transmission rod 601 moves upward along the lower vertical groove 7031 of the guide groove 703. Simultaneously, the transmission rod 601 drives the support plate 606 and the release plate 607 to rise synchronously. The release plate 607 supports the rotating cylinder 409 at the top of the impact column 401 through the pressing plate 610, and pulls the impact column 401 upward together with the transmission rod 601. During the upward movement of the impact column 401, the fixed circular plate 406 on its outer circumference will compress the spring 405 between the top of the guide frame 403 and the fixed circular plate 406, so that the spring 405 is in a compressed and stored state. At the same time, the guide block 407 on the side wall of the fixed circular plate 406 moves along the guide frame 403. The inner wall slides, and the slider 408 on the guide block 407 moves synchronously along the guide groove 404 to ensure the stability of the vertical rise of the impact column 401; when the drive column 602 slides along the lower vertical groove 7031 to the turning groove 7032, guided by the trajectory of the turning groove 7032, the drive column 602 drives the transmission rod 601 to rotate around its own axis, and the transmission rod 601 in turn drives the release plate 607 to rotate synchronously; after the release plate 607 rotates, the support relationship between the pressing plate 610 and the rotating drum 409 is released, and the impact column 401 slides rapidly downward along the inner cavity of the guide frame 403 under the elastic restoring force of the spring 405, and its bottom directly impacts the pressure block 2203 at the top of the vertical clamping member 22, and the pressure block 2203 transmits the instantaneous impact force to The clamped car suspension bushing 8 completes the instantaneous impact action; after a single impact, as the inclined inner round frame 506 and the inclined outer round frame 508 continue to rotate, the guiding action of the track on the guide wheel 605 switches to the downward direction, driving the transmission rod 601 and the drive column 602 to fall back to the initial position along the upper vertical groove 7033 of the guide groove 703. When the release plate 607 descends with the transmission rod 601, the rotating cylinder 409 re-presses the inclined structure at the bottom of the extrusion plate 610 into the top of the extrusion plate 610, completing the reset and waiting for the next lifting and lowering impact cycle; through the above process, multiple transmission components 6 achieve alternating action under the action of the successive drive components 5, so that multiple impact columns 401 form continuous and successive instantaneous impacts on the corresponding car suspension bushing 8;

[0070] S4. Under the same pressure and torque conditions, perform impact tests with different instantaneous impact forces. Keep multiple automotive suspension bushings 8 in the pressure and torque test state. Change the impact stroke of the impact column 401 through the stroke adjustment mechanism 7 to achieve loading tests with different instantaneous impact forces.

[0071] Specifically, the adjustment of the impact stroke and the application of different impact forces are achieved through the following steps:

[0072] S4.1 Impact stroke adjustment operation: The operator rotates the handwheel 709 of the stroke adjustment mechanism 7. The handwheel 709 drives the coaxially connected worm 708 to rotate. Because the worm 708 meshes with the worm wheel 706 on the side wall of the adjustment block 701, the worm wheel 706 rotates with the worm 708 and drives the coaxially connected gear 707 to rotate synchronously. Also, because the gear 707 meshes with the toothed plate 410 on the outer side wall of the guide frame 403, and the adjustment block 701 slides with the guide rail 411 of the guide frame 403 through the support plate 704 and the sliding plate 705, the rotation of the gear 707 will be converted into the vertical movement of the adjustment block 701 along the slide rail 411, thereby changing the height position of the turning groove 7032 in the guide groove 703 inside the adjustment block 701.

[0073] S4.2. Different impact force loading tests: When the height of the turning groove 7032 is adjusted upwards, the stroke of the drive column 602 sliding along the lower vertical groove 7031 to the turning groove 7032 increases. The height to which the transmission rod 601 drives the impact column 401 to rise also increases. During the upward movement of the impact column 401, the deformation of the compression spring 405 increases, and the elastic potential energy stored in the spring 405 increases. When the drive column 602 enters the turning groove 7032 and the transmission rod 601 releases the impact column 401, the energy released by the spring 405 during its reset increases, and the instantaneous downward impact velocity of the impact column 401 increases, transmitting... The instantaneous impact force on the vehicle suspension bushing 8 is increased when the height of the deflection groove 7032 is lowered. The height at which the drive column 602 drives the impact column 401 to rise is reduced, the compression deformation of the spring 405 is reduced, the elastic potential energy storage is reduced, the instantaneous speed of the impact column 401 during impact is slowed down, and the instantaneous impact force on the vehicle suspension bushing 8 is weakened. By adjusting the height of the deflection groove 7032 of the multiple stroke adjustment mechanisms 7 to multiple different heights, impact test operations with different instantaneous impact forces on multiple vehicle suspension bushings 8 can be carried out under the same pressure and torque conditions.

[0074] The embodiments disclosed in this invention are preferred embodiments, but are not limited thereto. Those skilled in the art can easily understand the spirit of this invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of this invention, they are all within the protection scope of this invention.

Claims

1. A device for testing the life of automotive bushings, characterized in that, Includes a base (1), on the top of the base (1) are arranged multiple compression and torsion test components (2) and a support frame (3), on the support frame (3) are arranged multiple impact test components (4), and the impact test components (4) are arranged above the compression and torsion test components (2); Multiple compression and torsion test components (2) are arranged in a ring array. Each compression and torsion test component (2) includes a horizontal clamping member (21) and a vertical clamping member (22). The vertical clamping member (22) includes a lower clamping block (2201) and an upper clamping block (2202). The upper clamping block (2202) has a pressure block (2203) integrally formed on its top. Multiple impact test components (4) are arranged in a ring array. Each impact test component (4) includes an impact column (401) and a fixing plate (402) arranged on the side wall of the support frame (3). A guide frame (403) is connected to the side wall of the fixing plate (402). Multiple guide grooves (404) are provided on the side wall of the guide frame (403). The impact column (401) is slidably arranged in the inner cavity of the guide frame (403). A spring (405) is sleeved on the outer circumference of the impact column (401). A fixing circular plate (406) is also connected to the outer circumference of the impact column (401). Spring 1 (405) is arranged between the fixed circular plate (406) and the top of the guide frame (403). The fixed circular plate (406) has multiple guide blocks (407) integrally formed on its side wall. The guide block (407) has a slider (408) integrally formed on its side wall. The slider (408) is slidably arranged in the guide groove (404). The guide block (407) forms contact sliding with the inner side wall of the guide frame (403) to ensure the verticality of the impact column (401) in the vertical direction. The upper side wall of the impact column (401) is rotatably connected to a rotating cylinder (409). The support frame (3) has a sequential drive assembly (5) arranged on top, and multiple transmission assemblies (6) are arranged below the sequential drive assembly (5). The multiple transmission assemblies (6) are arranged in a circular array. The transmission assemblies (6) are arranged on the side of the impact test assembly (4). The transmission assembly (6) includes a transmission rod (601). Multiple drive columns (602) are connected to the outer circumference of the transmission rod (601). The transmission rod (601) is used to drive the impact column (401) upward and release the impact column (401) to impact downward. The upper sidewall is connected to a support plate (606), and the sidewall of the support plate (606) is integrally formed with a release plate (607). The sidewall of the release plate (607) is provided with a groove (608), and the top of the release plate (607) is provided with multiple extrusion grooves (609). An extrusion plate (610) is slidably arranged in the extrusion grooves (609). The bottom of the extrusion plate (610) is set with a sloping structure. The bottom of the extrusion plate (610) is connected to a second spring (612) through a connecting block (611). The other end of the second spring (612) is connected to the sidewall of the release plate (607). The sequential drive assembly (5) includes a rotating column (501) rotatably arranged on the top of the support frame (3). The outer circumference of the rotating column (501) is connected to an inclined inner circular frame (506) by a plurality of connecting rods (505). The inclined inner circular frame (506) is connected to an inclined outer circular frame (508) by a connecting ring plate (507). A circular guide groove (509) is formed between the inclined inner circular frame (506) and the inclined outer circular frame (508), an upper circular slide groove (510) and a lower circular slide groove (511). The upper circular slide groove (510) and the lower circular slide groove (511) are connected by the circular guide groove (509). The transmission assembly (6) further includes multiple lifting rods (603), with an adaptation plate (604) rotatably arranged on the top of the lifting rods (603), and multiple guide wheels (605) arranged on the side wall of the adaptation plate (604); multiple fixed cylinders (301) are connected to the side wall of the support frame (3), the lifting rods (603) are slidably arranged in the inner cavity of the fixed cylinders (301), and the bottom of the lifting rods (603) is rotatably connected to the top of the transmission rods (601); The adapting plate (604) is movably arranged in the circular guide groove (509), wherein a plurality of guide wheels (605) are rolled in the upper circular groove (510) and another plurality of guide wheels (605) are rolled in the lower circular groove (511); The sequential drive assembly (5) can drive multiple transmission rods (601) to rise and fall sequentially, so that multiple impact columns (401) form a sequential instantaneous impact state. The impact test assembly (4) is provided with a stroke adjustment mechanism (7) on its side. The stroke adjustment mechanism (7) is used to adjust the impact stroke of the impact column (401). The stroke adjustment mechanism (7) includes an adjustment block (701). The adjustment block (701) has a guide hole (702) from top to bottom. The transmission rod (601) is slidably arranged in the guide hole (702). The inner wall of the guide hole (702) is provided with a plurality of guide grooves (703). The guide groove (703) is composed of a lower vertical groove (7031), a turning groove (7032) and an upper vertical groove (7033). The drive column (602) is movably arranged in the guide groove (703). When the drive column (602) slides from the lower vertical groove (7031) to the turning groove (7032), the drive column (602) can drive the transmission rod (601) to rotate, so that the transmission rod (601) releases the impact column (401) to impact downward.

2. The automotive bushing life testing device according to claim 1, characterized in that, The horizontal clamping member (21) is used to clamp the test shaft (23) with interference fit in the inner cavity of the automobile suspension bushing (8). The reciprocating rotation of the horizontal clamping member (21) realizes the torque test of the automobile suspension bushing (8). The lower clamping block (2201) and the upper clamping block (2202) are used to clamp the outer wall of the automobile suspension bushing (8). The downward movement of the vertical clamping member (22) realizes the application of continuous pressure to the automobile suspension bushing (8), forming a pressure test on the automobile suspension bushing (8). The pressure receiving block (2203) is arranged below the impact column (401). The pressure receiving block (2203) is used to receive the instantaneous impact of the impact column (401) and transmit the pressure to the automobile suspension bushing (8).

3. The automotive bushing life testing device according to claim 2, characterized in that, The guide frame (403) has a plurality of toothed plates (410) arranged on its outer side wall, and a slide rail (411) is arranged on the other outer side wall of the guide frame (403).

4. The automotive bushing life testing device according to claim 3, characterized in that, The groove (608) is used to provide an active channel for the rotating cylinder (409). When the release plate (607) moves downward from above the rotating cylinder (409), the rotating cylinder (409) can pass through the groove (608) and squeeze the inclined structure at the bottom of the extrusion plate (610) into the top of the extrusion plate (610). At this time, the extrusion plate (610) provides support for the rotating cylinder (409).

5. The automotive bushing life testing device according to claim 4, characterized in that, The successive drive assembly (5) includes a rotary motor (502) installed on the side wall of the support frame (3). The output end of the rotary motor (502) is connected to a gear (503). The outer circumferential wall of the rotating column (501) is provided with a toothed edge (504). The gear (503) meshes with the toothed edge (504).

6. The automotive bushing life testing device according to claim 5, characterized in that, The rotation axis of the rotating column (501) is vertical. The inclined inner circular frame (506) and the inclined outer circular frame (508) are inclined at an angle in the horizontal direction. When the rotating column (501) drives the inclined inner circular frame (506) and the inclined outer circular frame (508) to rotate, the inclined inner circular frame (506) and the inclined outer circular frame (508) form a periodic inclined swing rotation state.

7. The automotive bushing life testing device according to claim 6, characterized in that, The side wall of the adjusting block (701) is connected to a support plate (704), and a sliding plate (705) is arranged on the side wall of the support plate (704). The sliding plate (705) is slidably engaged with the slide rail (411) on the outer side wall of the guide frame (403). The adjusting block (701) has a worm gear (706) rotatably arranged on its side wall. The worm gear (706) is coaxially connected to a plurality of gears (707). The adjusting block (701) has a worm (708) rotatably arranged on its other side wall. The worm (708) is coaxially connected to a handwheel (709). The worm (708) meshes with the worm gear (706). The gears (707) mesh with the toothed plate (410) on the outer side wall of the guide frame (403).

8. A test method for an automotive bushing life testing device, which utilizes the testing device described in claim 7, characterized in that, Includes the following steps: S1. Clamping and fixing operation: The inner cavity of the car suspension bushing (8) is interference-fitted with the test shaft (23), and then the test shaft (23) is clamped and fixed by the horizontal clamping member (21). Then the lower clamping block (2201) and the upper clamping block (2202) of the vertical clamping member (22) are used to clamp the outer wall of the car suspension bushing (8). In this way, multiple car suspension bushings (8) are clamped and fixed respectively. S2, Torque test operation: the test shaft (23) is driven to rotate back and forth by the reciprocating rotation of the horizontal clamp (21) to form a state of applying reciprocating torque to the automobile suspension bushing (8). At the same time, the continuous pressure is applied to the automobile suspension bushing (8) by the downward movement of the vertical clamp (22). S3. Perform an instantaneous impact test under pressure and torsion conditions, maintain the pressure and torsion test state, and drive multiple transmission rods (601) to perform successive lifting and lowering movements through the successive drive assembly (5); at this time, the drive column (602) on the outer circumference of the transmission rod (601) moves upward along the lower vertical groove (7031); at the same time, the transmission rod (601) drives the release plate (607) to rise synchronously, and the release plate (607) supports the rotating cylinder (409) at the top of the impact column (401) through the extrusion plate (610), and pulls the impact column (401) upward together with the transmission rod (601); during the rise of the impact column (401), the spring (405) is in a compressed and stored state; when the drive column (602) slides along the lower vertical groove (7031) to the turning groove (7032), it is subjected to the turning groove (7032) The trajectory guidance effect of the drive column (602) drives the transmission rod (601) to rotate around its own axis, and the transmission rod (601) in turn drives the release plate (607) to rotate synchronously; after the release plate (607) rotates, the support relationship between the extrusion plate (610) and the rotating cylinder (409) is released, and the impact column (401) slides down rapidly along the inner cavity of the guide frame (403) under the elastic restoring force of the spring (405), and its bottom directly impacts the pressure block (2203). The pressure block (2203) transmits the instantaneous impact force to the clamped car suspension bushing (8) to complete the instantaneous impact action; multiple transmission components (6) realize alternating action under the action of the successive drive components (5), so that multiple impact columns (401) form continuous and successive instantaneous impacts on the corresponding car suspension bushings (8); S4. Under the same pressure and torque conditions, perform impact test operations with different instantaneous impact forces. Keep multiple automobile suspension bushings (8) in the pressure and torque test state. Change the impact stroke of the impact column (401) through the stroke adjustment mechanism (7) to achieve loading test with different instantaneous impact forces. Specifically, the adjustment of the impact stroke and the application of different impact forces are achieved through the following steps: S4.1 Impact stroke adjustment operation: The operator turns the handwheel (709), which drives the worm (708) to rotate. The worm wheel (706) rotates with the worm (708) and drives the gear two (707) to roll on the gear plate (410), thereby driving the adjusting block (701) to move in the vertical direction, thereby changing the height position of the turning groove (7032) in the guide groove (703) inside the adjusting block (701). S4.2 Different impact force loading test: When the height of the turning groove (7032) is adjusted upward, the stroke of the drive column (602) sliding along the lower vertical groove (7031) to the turning groove (7032) increases, and the height of the impact column (401) driven by the transmission rod (601) increases accordingly, which increases the instantaneous impact force of the impact column (401) downward; when the height of the turning groove (7032) is adjusted downward, the height of the impact column (401) driven by the drive column (602) decreases, and the instantaneous impact force of the impact column (401) downward decreases; by adjusting the height of the turning groove (7032) of multiple stroke adjustment mechanisms (7) to multiple different heights, the impact test operation of multiple automobile suspension bushings (8) with different instantaneous impact forces can be carried out under the same pressure and torque conditions.

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