Fixing device and method for motorcycle chassis vibration endurance test bench clamp

Abstract

The application discloses a fixing device and method of a motorcycle chassis vibration endurance test bench clamp, a front fixing component, which is used for clamping and fixing a handle of a motorcycle; a middle load component, which is used for applying a load along a gravity direction to a middle part of the motorcycle to simulate a stress state of the motorcycle in a riding state; a rear wheel rolling wheel component, which is used for limiting a rear wheel of the motorcycle; a front drum rotating mechanism and a rear drum rotating mechanism, which are used for providing driving force for rotation of the motorcycle wheel, and a plurality of special-shaped protrusions are arranged on the front drum rotating mechanism and the rear drum rotating mechanism, the motorcycle wheel and the special-shaped protrusions can be periodically contacted to make the motorcycle present an up-and-down vibration state, wherein the special-shaped protrusions are in an asymmetric state and are composed of two curved surfaces with different radii. The special-shaped protrusions can simulate road conditions of climbing long and steep slopes and can also simulate road conditions of bouncing when the motorcycle climbs a step from the ground.

Description

Technical Field

[0001] This invention relates to the field of fixing devices and methods, and in particular to a fixing device and method for a motorcycle chassis vibration durability test bench fixture. Background Technology

[0002] It is impossible for products to avoid vibration during transportation and use. Vibration can lead to damage such as resonance, deformation, cracking, fatigue, friction, and impacts between components. Vibration testing is an effective measure to improve product quality. Vibration test benches simulate vibration environments under laboratory conditions to test the structural strength and reliability of products in various application environments. They can perform various tests, including random, impact, and road spectrum simulation tests. Vibration test benches are widely used in aerospace, defense, automotive, motorcycle manufacturing, power, and electronics industries.

[0003] The vibration test fixture is used to firmly fix the test piece (motorcycle chassis) on the vibration table worktable. The vibration table's drum and bumps rotate simultaneously, generating radial vibration that is transmitted to the test piece. The test piece refers to the entire motorcycle chassis. Currently, when performing vibration testing on the motorcycle chassis on the test bench, the vertical direction of the entire vehicle must first be fixed. The front and rear wheels of the vehicle are respectively on the test bench. As the front wheel drum rotates and encounters the bumps, the tires will rise or fall, causing the entire motorcycle chassis to generate radial vibration in the vertical direction. A 75KG load is installed in the driver's position. The motorcycle chassis needs to be fixed in the front direction by a front fixing device fixture to ensure that the front and rear wheels are on the same plane to prevent the motorcycle from tilting. The rear wheel limit device prevents the motorcycle from sliding backward. During the vibration process, the motorcycle remains perpendicular to the test bench, allowing the vibration test piece to complete the test smoothly.

[0004] In existing technology, the front fixing device for securing the motorcycle chassis uses the front axle to fix the front wheel, clamps the left and right front shock absorbers on both sides, and fixes the front wheel and front suspension together. A sandbag (75KG) is tied to the seat with a rubber strap in the middle. A rear wheel is positioned behind the rear wheel, and a fixing bracket is used to secure the rear of the motorcycle. However, this front fixing device is only suitable for motorcycles with a dual front shock absorber structure and requires removing the original front axle and replacing it with a custom-made double-threaded front axle. Different models and displacements of motorcycles require different front axles. The dimensions also vary, requiring the customization of many different sizes and specifications of double-threaded front axles to meet the installation requirements of the front mounting device. The process of disassembling and assembling the front axle is cumbersome, and the testing and clamping time is lengthy, wasting labor time. It is not suitable for single-sided front shock absorber structures with a single arm. This clamping structure cannot meet the needs of some special front motorcycles (such as single-sided front shock absorber structures). This structure is limited in its use as a mounting device, causing the motorcycle to tilt during vibration testing. Furthermore, the mounting protrusions on the drum surface are semi-circular, failing to simulate test conditions with different slopes. Therefore, this application aims to provide a solution that overcomes the above-mentioned shortcomings. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a fixing device and method for a motorcycle chassis vibration durability test bench fixture.

[0006] The objective of this invention is achieved through the following technical solution: a fixing device for a motorcycle chassis vibration durability test bench fixture, characterized in that it comprises: a front fixing assembly for clamping and fixing the motorcycle handlebars; a middle load assembly for applying a load along the direction of gravity to the middle of the motorcycle to simulate the force state under motorcycle riding conditions; a rear wheel rolling wheel assembly for limiting the rear wheel of the motorcycle; a front drum rotating mechanism and a rear drum rotating mechanism for providing driving force for the rotation of the motorcycle wheel, wherein the front drum rotating mechanism and the rear drum rotating mechanism are each provided with a plurality of irregularly shaped protrusions, and the motorcycle wheel can periodically contact the irregularly shaped protrusions so that the motorcycle can exhibit an up-and-down vibration state, wherein the irregularly shaped protrusions are asymmetrical and are composed of two curved surfaces with different curvatures.

[0007] Preferably, the front fixing assembly includes a front fixing bracket slide assembly, a front fixing bracket base, a rocker arm, a left forearm, and a right forearm. The front fixing bracket slide assembly is disposed on the test bench base plate, the front fixing bracket base is slidably disposed on the front fixing bracket slide assembly, one end of the rocker arm is hinged to the front fixing bracket base, and the left and right forearms are both connected to the other end of the rocker arm.

[0008] Preferably, a double-headed bolt shaft is rotatably mounted on the front fixed frame base, the rocker arm is connected to the double-headed bolt shaft, a forearm connecting plate is rotatably mounted on the rocker arm, and both the left rocker arm and the right rocker arm are connected to the forearm connecting plate.

[0009] Preferably, both the left forearm and the right forearm include a forearm body and a universal joint adjustment assembly threaded to the end of the forearm body. The universal joint adjustment assembly is provided with a universal ball bullseye wheel, and a bushing is nested inside the universal ball bullseye wheel. A handle fixing seat clamping block is provided on the bushing.

[0010] Preferably, the central load assembly includes a left support folding frame assembly, a right support folding frame assembly, and a load plate steel block. The left support folding frame assembly is connected to one end of the load plate steel block, and the right support folding frame assembly is connected to the other end of the load plate steel block.

[0011] Preferably, both the left support folding frame assembly and the right support folding frame assembly include a load fixing frame base, a middle fixing support frame assembly, a first folding rocker arm, a second folding rocker arm, and a telescopic guide rod. The load fixing frame base is disposed on the test bench base plate, the middle fixing support frame assembly is connected to the load fixing frame base, the first folding rocker arm is hinged to the middle fixing support frame assembly, the second folding rocker arm is hinged to the first folding rocker arm, and the two ends of the telescopic guide rod are respectively hinged to the first folding rocker arm and the second folding rocker arm.

[0012] Preferably, the rear wheel rolling assembly includes a rolling wheel fixing bracket groove base, a rolling wheel support bracket assembly, and a rolling wheel assembly. The rolling wheel fixing bracket groove base is disposed on the test bench base plate, the rolling wheel support bracket assembly is slidably disposed on the test bench base plate, and the rolling wheel assembly is rotatably disposed on the rolling wheel support bracket assembly.

[0013] Preferably, the fixing device further includes a rear fixing assembly, which includes a right rear fixing base, a left rear fixing base, a rear fixing cross tube assembly, and a rubber band. The right rear fixing base and the left rear fixing base are arranged parallel to each other on the test platform base plate. The rear fixing cross tube assembly is connected to both the right rear fixing base and the left rear fixing base. The rubber band is disposed on the rear fixing cross tube assembly.

[0014] Preferably, protective components are provided on both sides of the rear drum rotating mechanism.

[0015] A method for fixing a motorcycle chassis vibration durability test fixture, characterized in that it includes: a front fixing assembly for clamping and fixing the motorcycle handlebars; a middle load assembly for applying a load along the direction of gravity to the middle of the motorcycle to simulate the force state under motorcycle riding conditions; a rear wheel rolling wheel assembly for limiting the rear wheel of the motorcycle; and a front drum rotating mechanism and a rear drum rotating mechanism for providing driving force for the rotation of the motorcycle wheels. The front drum rotating mechanism and the rear drum rotating mechanism are configured such that each has several irregularly shaped protrusions, allowing the motorcycle wheels to periodically contact the irregularly shaped protrusions to achieve an up-and-down vibration state of the motorcycle. The irregularly shaped protrusions are asymmetrical, consisting of two curved surfaces with different curvatures.

[0016] The present invention has the following advantages:

[0017] (1) The front fixing component is clamped on the left and right grip positions of the handlebar. A universal ball eye wheel is used to align the motorcycle handlebar. The angle can be adjusted according to the handlebar angle of different models. There is a fixed seat clamping block on each side of the universal ball eye wheel for axial limiting and locking, simulating the position and movement of the driver's left and right hands holding the handlebar when driving a motorcycle. This fixture is easy to install with the motorcycle handlebar parts and is suitable for the handlebar angle of all motorcycle structures. It does not require removing the original front wheel axle and replacing it with a special axle, saving time and reducing labor costs.

[0018] (2) The base of the front fixed component is connected to the first rocker arm by a hinge and can rotate flexibly. A T-shaped bushing can be installed inside the rocker arm bushing. Lubricating oil injection nozzles can be installed on the bushings fixed at both ends of the rocker arm to lubricate the T-shaped bushing and the shaft to reduce friction. The T-shaped bushing can be replaced after wear, saving maintenance costs. When the motorcycle vibrates and bounces up and down, the rocker arm will swing to play a buffering role, extend the service life of the clamp, and greatly improve durability.

[0019] (3) The irregular protrusions on the wheel are irregularly shaped, and the slope surface is designed asymmetrically: the function of the irregular protrusions is to simulate the road conditions of motorcycle wheels climbing long slopes and steep slopes; it can also simulate the road conditions when the vehicle bounces up the steps from the ground; the effect of this irregular protrusion is particularly obvious when tested on the test bench.

[0020] (4) The load plate steel block replaces the traditional sandbag load. The telescopic guide rod plays a free up and down extension and retraction role when the test piece, i.e., the motorcycle, vibrates and bounces up and down, balancing the load weight on both sides and maintaining vertical up and down movement; avoiding the left and right swing of the folding mechanism and the left and right movement of the load steel block. Attached Figure Description

[0021] Figure 1 A schematic diagram of the use of the fixing device of the motorcycle chassis vibration durability test bench fixture in the main view.

[0022] Figure 2 A top-view diagram illustrating the usage of the fixing device for the motorcycle chassis vibration durability test bench fixture.

[0023] Figure 3 A schematic diagram of the use of the fixing device of the motorcycle chassis vibration durability test bench fixture in axial view.

[0024] Figure 4 A schematic diagram of the structure of the left or right forearm;

[0025] Figure 5 A schematic diagram of the left support folding frame assembly or the right support folding frame assembly;

[0026] In the diagram, 100-front fixed assembly, 200-middle load assembly, 300-rear wheel rolling assembly, 400-protection assembly, 500-rear fixed assembly, 910-front drum rotating mechanism, 920-rear drum rotating mechanism, 1000-test bench base plate, 510-right base of rear fixed frame, 520-left base of rear fixed frame, 530-rear fixed frame horizontal tube assembly, 540-rear fixed frame bolt, 570-rubber rope, 930-rotor, 960-irregular protrusion, 940-front drive motor, 970-rear drive motor, 950-first transmission belt, 980-second transmission belt, 110-front fixed frame slide rail assembly, 120-front fixed frame base, 130-double-headed bolt shaft. 140-Rocker arm, 150-Forearm connecting plate, 160-Left forearm, 170-Right forearm, 180-Handle fixing seat clamping block, 174-Universal joint adjustment assembly, 179-Internal thread, 172-Forearm body, 177-External thread, 175-Universal ball eye wheel, 183-Bushing, 280-Left support folding frame assembly, 290-Right support folding frame assembly, 260-Load plate steel block, 270-Positioning ring assembly, 210-Load fixing frame base, 220-Middle fixing support frame assembly, 230-First folding rocker arm, 240-Second folding rocker arm, 250-Telescopic guide rod, 310-Rolling wheel fixing frame slide base, 320-Rolling wheel support frame assembly, 330-Rolling wheel assembly. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings. The scope of protection of the present invention is not limited to the following description:

[0028] like Figures 1 to 5As shown, this application provides a fixing device for a motorcycle chassis vibration durability test bench fixture, including a front fixing component 100, a middle load component 200, a rear wheel rolling wheel assembly 300, a protection component 400, a rear fixing component 500, a front drum rotating mechanism 910, a rear drum rotating mechanism 920, and a test bench base plate 1000. The front fixing component 100, middle load component 200, protection component 400, and rear fixing component 500 are all mounted on the test bench base plate 1000. The front fixing component 100 is used to clamp and fix the handlebars of the test piece (motorcycle) to be tested. The middle load component 200 is used to fix the middle of the motorcycle and apply a certain load to the middle of the motorcycle to simulate the weight of the driver. The rear fixing component 500 is used to bind and fix the motorcycle to prevent it from moving forward during the test. During the test, the motorcycle is placed on the test bench base plate 1000. The motorcycle's front wheel is mounted on the front swivel mechanism 910, and the rear wheel is mounted on the rear swivel mechanism 920. Rotation of the front and rear swivel mechanisms 910 and 920 simulates the motorcycle's driving state. Two protective components 400 are provided, located on the left and right sides of the rear wheel to prevent excessive wheel sway during testing. The rear wheel roller assembly 300 abuts against the rear wheel, further limiting its movement.

[0029] Preferably, the rear fixing device 500 mainly consists of a right rear fixing bracket base 510, a left rear fixing bracket base 520, a rear fixing bracket cross tube assembly 530, and four rear fixing bracket bolts 540. The rear fixing bracket cross tube assembly 530 has four internally threaded holes that mate with the rear fixing bolts 540. Rubber straps 570 can be attached to the rear fixing bolts 540 to secure them to the rear of the motorcycle, thus preventing the motorcycle from lurching forward.

[0030] Preferably, both the front drum rotating mechanism 910 and the rear drum rotating mechanism 920 include a rotating wheel 930 and a plurality of irregularly shaped protrusions 960 disposed on the surface of the rotating wheel 930. The front drum rotating mechanism 910 is equipped with a front drive motor 940, and the rear drum rotating mechanism 920 is equipped with a rear drive motor 970. The front drive motor 940 is connected to the rotating wheel of the front drum rotating mechanism 910 via a first transmission belt 950, and the rear drive motor 970 is connected to the rotating wheel of the rear drum rotating mechanism 920 via a second transmission belt 980. The rotation of the rotating wheel is achieved by driving the front drive motor and the rear drive motor, thereby synchronously driving the rotation of the front and rear wheels of the motorcycle. The plurality of irregularly shaped protrusions 960 can be fixed to the rotating wheel with hexagonal head bolts. The plurality of irregularly shaped protrusions 960 can be arranged at intervals along the circumference of the rotating wheel. One surface of the irregularly shaped protrusion 960 is an irregularly shaped long sloping arc shape, and the other surface is a stepped surface with rounded corners. The rear drive motor 970 drives the front drum rotating mechanism 910 to rotate clockwise via the second transmission belt 980. When the wheel rotates clockwise, the friction between the two objects drives the front wheel of the motorcycle to rotate counterclockwise. During the rotation, when the front tire hits the irregular protrusion 960, the front wheel assembly will bounce up and down vertically. The vibration is transmitted to the motorcycle frame assembly through the front fork suspension assembly, simulating the road test conditions. This allows for testing the vibration resistance and fatigue strength of various parts of the motorcycle chassis.

[0031] Preferably, the front fixing assembly 100 mainly consists of a front fixing frame slide groove assembly 110, a front fixing frame base 120, a double-ended bolt shaft 130, two rocker arms 140, a forearm connecting plate 150, a left forearm 160, a right forearm 170, and four handle fixing seat clamping blocks 180. The front fixing frame base 120 is welded from thick steel plates and steel pipes. The front fixing frame slide groove assembly 110 is mounted on the test bench base plate 1000. The front fixing frame base 120 is slidably mounted on the front fixing frame slide groove assembly 110 and can move along the sliding groove on the front fixing slide groove assembly 110. The double-ended bolt shaft 130 is hinged to the front fixing frame base 120 to rotate about its own central axis, and a rocker arm 140 is connected to each of the two ends of the double-ended bolt shaft 130. The forearm connecting plate 150 is connected to both rocker arms. It is understood that the forearm connecting plate 150 can be hinged to the rocker arms to achieve their rotation. Both the left forearm 160 and the right forearm 170 are mounted on the forearm connecting plate 150. Two handlebar clamping blocks 180 are respectively mounted on the left forearm 160 and the right forearm 170. The handlebar clamping blocks 180 are hinged to the left and right forearms 160 and 170 using a ball joint, allowing for 360° rotation and easy adjustment of the angle of the handlebar clamping blocks 180 according to the motorcycle model. The specific installation method of the handlebar clamping blocks 180 is as follows: one end of the universal joint adjusting assembly 174 is fixed with an internal thread 179 that mates with the external thread 177 of the forearm body 172; the other end has a universal ball eye wheel 175 fixed in a hole, and a bushing 183 is fixed inside the hole of the universal ball eye wheel 175. The bushing 183 is made of 304 stainless steel tubing; the handlebar clamping blocks 180 can be fitted onto the bushing 183.

[0032] Preferably, the central load assembly 200 is composed of a left support folding frame assembly 280, a right support folding frame assembly 290, a load plate steel block 260, and four sets of positioning ring assemblies 270. The left support folding frame assembly 280 and the right support folding frame assembly 290 have the same structure and are respectively installed on both sides of the load plate steel block 260. Specifically, both the left support folding frame assembly 280 and the right support folding frame assembly 290 include a load fixing frame base 210, a central fixing support frame assembly 220, a first folding rocker arm 230, a second folding rocker arm 240, and a telescopic guide rod 250. The load fixing frame base 210 is mounted on the test bench base plate 1000. One end of the central fixing support frame assembly 220 is connected to the load fixing frame base 210. One end of the first folding rocker arm 230 is hinged to the other end of the central fixing support frame assembly 220. One end of the second folding rocker arm is hinged to the first folding rocker arm 230. The two telescopic guide rods 250 are respectively hinged to the first folding rocker arm and the second folding rocker arm. The telescopic guide rods 250 can be extended or shortened, thereby adjusting the height of the load plate steel block 260. In use, the load plate steel block 260 can be placed on the motorcycle seat to simulate the riding position of a driver.

[0033] Preferably, the rear wheel roller assembly 300 comprises a roller fixing bracket slide base 310, a roller support bracket assembly 320, and a roller assembly 330. The roller fixing bracket slide base 310 can be fixed to the test bench base plate 1000 with screws. The roller support bracket assembly 320 is slidably mounted on the roller fixing bracket slide base 310. The roller assembly 330 is mounted on the roller support bracket assembly 320. The roller assembly 330 can abut against the rear wheel of the motorcycle, further limiting the movement of the rear wheel.

[0034] Preferably, the protective component 400 can be a cylindrical solid steel material, which serves as a limiting protection when the rear wheel rotates, protecting the rear tire from sliding and shifting within this range.

[0035] The method of using the fixing device of the motorcycle chassis vibration durability test bench fixture is as follows: Move the motorcycle onto the test bench frame, place the front wheel assembly on the front drum rotating mechanism 910, and place the rear wheel assembly on the rear drum rotating mechanism 920. First, fix the handlebar tube with the front fixing component 100, then press the motorcycle frame assembly with the load plate steel block 260 of the middle load component 200, and then use the rolling wheel component 330 of the rear wheel rolling wheel component 300 to be adjacent to the rear tire surface of the rear wheel assembly, and use rubber rope straps 570 to tie them to the rear of the motorcycle. Pull the motorcycle from the rear end to prevent the motorcycle from rushing forward.

[0036] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fixing device of a motorcycle chassis vibration endurance test bench fixture, characterized in that, The utility model relates to a motorcycle test bench, which comprises: a front fixing assembly (100) for clamping and fixing a handlebar of a motorcycle; a middle load assembly (200) for applying a load along the direction of gravity to the middle part of the motorcycle to simulate the force state of the motorcycle in a riding state; a rear wheel rolling wheel assembly (300) for limiting a rear wheel of the motorcycle; a front drum rotating mechanism (910) and a rear drum rotating mechanism (920) for providing driving force for the rotation of the wheels of the motorcycle, wherein each of the front drum rotating mechanism (910) and the rear drum rotating mechanism (920) is provided with a plurality of special-shaped protrusions (960), and the wheels of the motorcycle can periodically contact the special-shaped protrusions (960) to make the motorcycle present an up-and-down vibration state, wherein the special-shaped protrusions (960) are in an asymmetric state and are composed of two curved surfaces with different radii. The front fixing assembly (100) comprises a front fixing frame sliding groove assembly (110), a front fixing frame base (120), a rocker arm (140), a left front arm (160), and a right front arm (170), the front fixing frame sliding groove assembly (110) is arranged on a test bench base plate (1000), the front fixing frame base (120) is slidingly arranged on the front fixing frame sliding groove assembly (110), one end of the rocker arm (140) is hingedly connected to the front fixing frame base (120), and the left front arm (160) and the right front arm (170) are both connected to the other end of the rocker arm (140). A double-headed bolt shaft (130) is rotatably arranged on the front fixing frame base (120), the rocker arm (140) is connected to the double-headed bolt shaft (130), a front arm connecting plate (150) is rotatably arranged on the rocker arm (140), and the left front arm (160) and the right front arm (170) are both connected to the front arm connecting plate (150). The left front arm (160) and the right front arm (170) each comprise a front arm main body (172) and a universal joint adjusting assembly (174) threadedly connected to the end of the front arm main body (172), a universal ball eye wheel (175) is arranged on the universal joint adjusting assembly (174), a bushing (183) is nested in the universal ball eye wheel (175), and a handlebar fixing seat clamping block (180) is arranged on the bushing (183).

2. The fixture of a motorcycle chassis vibration durability test bench clamp according to claim 1, characterized in that, The middle load assembly (200) comprises a left support folding frame assembly (280), a right support folding frame assembly (290), and a load plate steel block (260), the left support folding frame assembly (280) is connected to one end of the load plate steel block (260), and the right support folding frame assembly (290) is connected to the other end of the load plate steel block (260).

3. The fixture of claim 2, wherein, The left support folding frame assembly (280) and the right support folding frame assembly (290) each comprise a load fixing frame base (210), a middle fixed support frame assembly (220), a first folding rocker arm (230), a second folding rocker arm (240) and a telescopic guide rod (250), the load fixing frame base (210) is arranged on the test bench base plate (1000), the middle fixed support frame assembly (220) is connected to the load fixing frame base (210), the first folding rocker arm (230) is hinged to the middle fixed support frame assembly (220), the second folding rocker arm (240) is hinged to the first folding rocker arm (230), and the two ends of the telescopic guide rod (250) are hinged to the first folding rocker arm (230) and the second folding rocker arm (240) respectively.

4. The fixture of claim 1, wherein, The rear wheel rolling wheel assembly (300) comprises a rolling wheel fixing frame sliding groove base (310), a rolling wheel support frame assembly (320) and a rolling wheel assembly (330), the rolling wheel fixing frame sliding groove base (310) is arranged on the test bench base plate (1000), the rolling wheel support frame assembly (320) is slidingly arranged on the test bench base plate (1000), and the rolling wheel assembly (330) is rotationally arranged on the rolling wheel support frame assembly (320).

5. The fixture of claim 1, wherein, The fixing device further comprises a rear fixing assembly (500), the rear fixing assembly (500) comprises a rear fixing frame right base (510), a rear fixing frame left base (520), a rear fixing frame cross pipe assembly (530) and a rubber rope belt (570), the rear fixing frame right base (510) and the rear fixing frame left base (520) are arranged on the test bench base plate (1000) in parallel with each other, the rear fixing frame cross pipe assembly (530) is connected to the rear fixing frame right base (510) and the rear fixing frame left base (520) at the same time, and the rubber rope belt (570) is arranged on the rear fixing frame cross pipe assembly (530).

6. The fixture of claim 1, wherein, The protection assembly (400) is arranged on both sides of the rear rotating drum rotating mechanism (920).

7. A method of securing a motorcycle chassis vibration durability test bench fixture, characterized by, It comprises: A front fixing assembly (100) configured to clamp and fix the handlebar of the motorcycle; A middle load assembly (200) configured to apply a load in the direction of gravity to the middle part of the motorcycle to simulate the stress state of the motorcycle in the riding state; A rear wheel rolling wheel assembly (300) configured to limit the rear wheel of the motorcycle; A front rotating drum rotating mechanism (910) and a rear rotating drum rotating mechanism (920) configured to provide driving force for the rotation of the motorcycle wheel, wherein the front rotating drum rotating mechanism (910) and the rear rotating drum rotating mechanism (920) are configured to have a plurality of special-shaped protrusions (960) arranged thereon, so that the motorcycle wheel can periodically contact the special-shaped protrusions (960) to realize the state that the motorcycle presents up and down vibration, and the special-shaped protrusions (960) are in an asymmetric state and are composed of two curved surfaces with different radii.

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