Automobile shaft detection device and detection method

Abstract

The invention relates to the field of automobile shaft detection, in particular to an automobile shaft detection device and method. The device comprises a stretching assembly, a detection plate, an adjusting assembly and a detection assembly. The stretching assembly is located on the detection table and is fixed in the middle and telescopic at two ends; one group of detection plates is positioned on the fixed part of the stretching assembly, and the other two groups of detection plates are respectively positioned on the telescopic parts of the stretching assembly; the adjusting assembly is arranged on the detection plate; the detection assembly is arranged on the adjusting assembly and moves on the detection plate in the X direction and the Y direction through position adjustment of the adjusting assembly. The detection assembly comprises a detection outer sleeve connected with the adjusting assembly and a detection inner sleeve coaxially rotating in the detection outer sleeve; the interior of the detection inner sleeve is used for an automobile shaft to pass through and is provided with a detection end, and the two ends of the detection inner sleeve are provided with rotating parts with polishing and clamping functions. Flexible multi-point detection is carried out on the automobile axle, the detection method is diversified, the detection range is large, the efficiency is high, errors are small, and the quality of an automobile chassis is guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of automobile axle detection, and in particular to an automobile axle detection device and a detection method. Background Art

[0002] The automobile chassis is the supporting frame of the vehicle, which mainly includes the transmission system, suspension system, steering system, braking system and frame / body structure. The automobile axle is one of the core components of the chassis transmission system and suspension system. Its main functions include transmitting power, supporting weight and connecting wheels. Automobile axles are usually divided into two categories: drive shafts and wheel axles. Automobile axles are subjected to large torsion, bending, tension, compression and wear during operation. In order to ensure that the axle will not break due to insufficient strength or defects during operation and cause accidents, it is necessary to test the deformation and fracture resistance of automobile axles when subjected to torque, bending and stretching during the production process of automobile chassis.

[0003] A Chinese patent document with authorization announcement number CN111474321B discloses an automobile axle detection device and detection method, including a symmetrical L-shaped bracket, one end of the horizontal plate of each of the L-shaped brackets is fixedly connected to one end of a symmetrical support plate, the other end of each pair of support plates is fixedly connected to the two vertical rod ends of the U-shaped bracket, the upper sides of the symmetrical U-shaped brackets are fixedly connected to a circular ring plate one, the lower ends of the inner walls of the symmetrical circular ring plates one are fixedly connected to one end of a horizontal rod, and the other ends of the symmetrical horizontal rods are fixedly connected to the lower parts of both sides of a fixing ring.

[0004] The above-mentioned automobile axle detection device and detection method have the following shortcomings: the use of the detector to directly detect the automobile axle cannot simulate the stress condition of the automobile axle. Therefore, the categories of automobile axle performance that can be detected are limited, the automobile axle performance data that can be obtained is single, and it is even more impossible to intuitively detect the performance changes of the automobile axle in response to torsion, bending, tension, compression and wear during operation. Summary of the invention

[0005] In view of the problems existing in the background technology, an automobile axle detection device and detection method are proposed. By performing flexible multi-point detection on the automobile axle, the detection method is diverse, the detection range is large, the efficiency is high, and the error is small, which is conducive to ensuring the quality of the automobile chassis.

[0006] The present invention proposes an automobile axle detection device, comprising a stretching assembly, a detection plate, an adjustment assembly and a detection assembly. The stretching assembly is located on the detection table and is arranged to be fixed in the middle and telescopic at both ends; the detection plate is arranged in three groups, one group is located on the fixed part of the stretching assembly, and two groups are respectively located on the telescopic parts of the stretching assembly; the adjustment assemblies are arranged on the detection plate in a one-to-one correspondence; the detection assemblies are arranged on the adjustment assemblies in a one-to-one correspondence, and move along the X and Y directions on the detection plate through the position adjustment of the adjustment assemblies; the detection assembly comprises a detection outer sleeve connected to the adjustment assembly and a detection inner sleeve coaxially rotating in the detection outer sleeve; the interior of the detection inner sleeve is for the automobile axle to pass through, and a detection end is arranged, and rotating parts with grinding and clamping functions are arranged at both ends of the detection inner sleeve.

[0007] Preferably, the stretching assembly includes a double-headed telescopic driving member; the double-headed telescopic driving member is arranged in parallel on both sides of the detection platform; a slider 1 is arranged on the telescopic end of each group of double-headed telescopic driving members; and the slider 1 is connected to the detection plate.

[0008] Preferably, the adjustment assembly includes an adjustment frame; the adjustment frame is slidably arranged on the detection plate along the X direction, and a slider 2 is arranged on the adjustment frame for sliding along the Y direction; the detection jacket is connected to the slider 2; and a pulling reinforcement member is arranged on the adjustment frame for pulling the slider 2 to move horizontally.

[0009] Preferably, the detection inner sleeve comprises a sleeve body rotatably connected to the detection outer sleeve; a driving member for driving the detection inner sleeve to rotate is arranged at the end of the sleeve body; and a plurality of groups of rotating members are arranged along the sleeve opening of the sleeve body.

[0010] Preferably, the rotating member comprises a driving motor located on the sleeve; a bending rod is connected to the main shaft of the driving motor; an electric grinding roller is connected to the bending rod; and the electric grinding roller is arranged parallel to the center line of the automobile shaft.

[0011] Preferably, a circle of mounting grooves is arranged inside the sleeve body; the mounting groove is the detection end, and an ultrasonic detector is arranged in the mounting groove.

[0012] Preferably, a dust suction piece is arranged inside the casing; the dust suction piece comprises a dust suction port and a dust collecting box located on the casing; a negative pressure pump is arranged inside the dust collecting box and is connected to the dust suction port through a dust suction pipe.

[0013] Preferably, dust collecting cavities are arranged on both sides of the installation groove; a dust suction port is arranged in a circle along the sleeve body and is respectively connected to the dust collecting cavities on both sides; and a dust suction pipe is connected to the dust collecting cavities.

[0014] The present invention further proposes a vehicle axle detection method, using the above-mentioned vehicle axle detection device, and the detection steps are as follows: S1. Pass the automobile axle through three sets of detection inner sleeves in sequence; S2. Detection method 1: Use rotating parts to fix the automobile shaft from both ends; stretch the automobile shaft by stretching the assembly to perform telescopic detection; Detection method 2: Use rotating parts to fix the automobile shaft at three points; the detection component in the middle moves to one side of the automobile shaft, and the detection components at both ends move to the other side of the automobile shaft to perform bending detection; Detection method three: Use rotating parts to fix the automobile shaft at three points; the detection component in the middle does not move, and the detection components at both ends move in opposite directions toward the two sides of the automobile shaft to perform bending detection; Detection method 4: Use rotating parts to fix the automobile shaft from both ends, and the detection inner sleeves at both ends rotate in opposite directions to perform torsion detection; Detection method 5: Use rotating parts to fix the automobile shaft from both ends, and the detection plate in the middle moves between the detection plates on both sides. The rotating part in the middle grinds the automobile shaft during the movement to perform wear detection; S3. The detection end collects the detection data of the automobile shaft to determine the deformation and fracture resistance of the automobile shaft when subjected to torsion, bending, tension, compression and wear.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects: first, the detection assembly can move in the X direction and the Y direction during detection. By moving in different directions and applying corresponding loads, the automobile shaft can be tested for tension, compression and bending. Then, the detection inner sleeve rotates coaxially in the detection outer sleeve, and the automobile shaft is fixed with the rotating parts on both sides, so that the automobile shaft can be driven to rotate, and the torsion detection can be performed by adjusting the steering and the rotation speed. Since the rotating parts are arranged to be movable and rotatable, and are paired one after the other, not only can the rotation of the automobile shaft be controlled, but also the automobile shaft can be clamped and polished to meet the wear detection requirements. Finally, the ultrasonic detector collects the automobile shaft performance data in a timely and comprehensive manner. The dust collecting part cleans the automobile shaft and the ultrasonic detector, and removes the dust during polishing. Finally, through the cooperation of multiple groups of detection plates, adjustment components and detection components, the automobile shaft is flexibly detected at three points. The detection method is diverse, the detection range is large, the efficiency is high, the error is small, and it is conducive to ensuring the quality of the automobile chassis. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the automobile axle detection device in the present invention; Figure 2 It is a schematic diagram of the disassembly of the automobile axle detection device in the present invention; Figure 3 It is a structural schematic diagram of a single set of detection panels, adjustment components and detection components in the present invention; Figure 4 for Figure 3 Schematic diagram of the splitting; Figure 5 It is a structural schematic diagram of the detection component in the present invention; Figure 6 for Figure 4 The enlarged schematic diagram of point A in the middle; Figure 7 is a cross-sectional view of the detection component in the present invention; Figure 8 for Figure 7 A magnified schematic diagram of point B in the middle.

[0017] Figure numerals: 1, test table; 101, slideway 1; 2, test plate; 3, stretching assembly; 301, double-head telescopic drive member; 302, slider 1; 4, adjustment assembly; 401, adjustment frame; 402, slider 3; 403, mounting table; 404, pulling reinforcement member; 405, slideway 3; 406, slider 2; 407, connecting block; 408, lead screw; 5, test assembly; 501, test outer sleeve; 502, test inner sleeve ; 50201, sleeve; 50202, mounting groove; 50203, ultrasonic detector; 50204, dust suction port; 50205, dust collection chamber; 50206, dust collection box; 50207, dust suction tube; 503, rotating part; 50301, driving motor; 50302, bending rod; 50303, electric grinding roller; 505, mounting groove; 506, driving part; 50601, gear; 50602, gear ring. DETAILED DESCRIPTION

[0018] Embodiment 1, as Figure 1-Figure 4 As shown, a vehicle axle detection device proposed by the present invention comprises a stretching assembly 3, a detection plate 2, an adjustment assembly 4 and a detection assembly 5. The stretching assembly 3 is located on the detection platform 1 and is arranged to be fixed in the middle and telescopic at both ends; the detection plate 2 is arranged in three groups, one group is located on the fixed part of the stretching assembly 3, and the other two groups are respectively located on the telescopic part of the stretching assembly 3; the adjustment assembly 4 is arranged on the detection plate 2 in a one-to-one correspondence; the detection assembly 5 is arranged on the adjustment assembly 4 in a one-to-one correspondence, and moves along the X and Y directions on the detection plate 2 through the position adjustment of the adjustment assembly 4; the detection assembly 5 comprises a detection outer sleeve 501 connected to the adjustment assembly 4 and a detection inner sleeve 502 coaxially rotating in the detection outer sleeve 501; the interior of the detection inner sleeve 502 is for the automobile axle to pass through, and a detection end is arranged, and rotating parts 503 with grinding and clamping functions are arranged at both ends of the detection inner sleeve 502.

[0019] The X direction mentioned in the present invention refers to the length direction of the automobile shaft (needs to be parallel to the detection plate 2), and the Y direction refers to the diameter direction of the automobile shaft (needs to be parallel to the detection plate 2).

[0020] like Figure 1-Figure 2 As shown, the stretching assembly 3 includes a double-headed telescopic driving member 301; the double-headed telescopic driving member 301 is arranged in parallel on both sides of the detection platform 1; a slider 302 is arranged on the telescopic end of each group of double-headed telescopic driving members 301; the slider 302 is connected to the detection plate 2.

[0021] It should be further explained that a slide groove 101 is provided on the testing platform 1 for the sliding block 302 to slide.

[0022] The double-headed telescopic drive member 301 is set as a double-headed bidirectional cylinder. The double-headed bidirectional cylinder applies tension or pressure to both ends of the automobile shaft at the same time to simulate the tensile or compressive load that the automobile shaft bears in actual use, thereby testing its performance. During the test, the two ends of the double-headed bidirectional cylinder are respectively connected to the test bench 1 at both ends through the slider 1 302, and the automobile shaft is fixed by the rotating member 503. Ensure that the push rod of the double-headed bidirectional cylinder is aligned with the center line of the automobile shaft to avoid eccentric loading. Then perform tension and compression tests.

[0023] During the tensile test, tension is applied to both ends of the vehicle shaft at the same time, and the load is gradually increased until the preset value is reached or the shaft breaks. During the compression test, opposite pressure is applied to both ends of the vehicle shaft. The detection end records the change data of the vehicle shaft during the tensile and compression tests.

[0024] like Figure 3 and Figure 4 As shown, the adjustment component 4 includes an adjustment frame 401; the adjustment frame 401 is slidably set on the detection plate 2 along the X direction, and a slider 406 sliding along the Y direction is set on the adjustment frame 401; the detection jacket 501 is connected to the slider 406; the adjustment frame 401 is provided with a pulling reinforcement 404 for pulling the slider 406 to move horizontally.

[0025] It needs to be further explained that a slide groove 2 is provided on the detection plate 2 for the slider 3 402 to slide; a lead screw 408 driven to rotate by a motor is provided in the slide groove 2; the slider 3 402 is connected to the lead screw 408 by a thread and slides horizontally in the slide groove 2.

[0026] It should be further explained that mounting platforms 403 are set at both ends of the adjustment frame 401, and a slide groove 405 is set in the middle; the pulling reinforcement 404 is set as a hydraulic cylinder, and two groups of hydraulic cylinders are respectively set on two groups of mounting platforms 403, and the telescopic rods are connected to the detection jacket 501 on the left and right through the connecting block 407.

[0027] It should be further explained that the slider 2 406 is slidably disposed in the slide groove 3 405; the slide groove 3 405 and the slide groove 2 are perpendicular to each other.

[0028] By sliding the slider 2 406 along the X direction and the slider 3 402 along the Y direction, the position of the detection component 5 can be adjusted, that is, the position of the automobile axle at the detection point can be adjusted. By moving multiple detection points, not only can automobile axles of different sizes be positioned, but also loads can be applied to corresponding detection points in coordination with the pulling reinforcement 404 to achieve the detection of the deformation and fracture resistance of the automobile axle.

[0029] like Figure 5-Figure 6As shown, the detection inner sleeve 502 includes a sleeve body 50201 rotatably connected to the detection outer sleeve 501; a driving member 506 for driving the detection inner sleeve 502 to rotate is arranged at the end of the sleeve body 50201; and multiple groups of rotating members 503 are arranged along the sleeve opening of the sleeve body 50201.

[0030] It should be further explained that a circle of mounting grooves 505 are set at the sleeve opening of the sleeve body 50201; the driving member 506 includes a gear ring 50602 located in the mounting groove 505; a gear 50601 driven to rotate by a motor is set on the detection sleeve 501; the gear 50601 is meshed and connected to the gear ring 50602, driving the sleeve body 50201 to rotate coaxially relative to the detection sleeve 501.

[0031] The rotation of the sleeve 50201 can drive the detection end to rotate synchronously, realizing 360-degree detection, and can also be used for torsion detection.

[0032] like Figure 7 As shown, the rotating member 503 includes a driving motor 50301 located on the sleeve 50201; the main shaft of the driving motor 50301 is connected to a bent rod 50302; the bent rod 50302 is connected to an electric grinding roller 50303; and the electric grinding roller 50303 is arranged parallel to the center line of the automobile shaft.

[0033] During the inspection, the driving motor 50301 drives the bending rod 50302 to rotate, so that the electric grinding roller 50303 on the periphery is close to the automobile shaft and fits the shaft wall. During the inspection, since the electric grinding roller 50303 can move and rotate, and two groups are set one in front and one behind, the automobile shaft can be clamped while grinding the automobile shaft, and the rotation of the automobile shaft can also be controlled to meet the inspection requirements.

[0034] like Figure 7 As shown, a circle of mounting grooves 50202 are arranged inside the sleeve body 50201 ; the mounting groove 50202 is the detection end, and an ultrasonic detector 50203 is arranged inside the mounting groove 50202 .

[0035] The ultrasonic detector 50203 is arranged in the installation groove 50202, which can reduce the collision and wear of the automobile shaft on the ultrasonic detector 50203, thereby achieving a protective effect. During the detection, the propagation and reflection of sound waves in the automobile shaft can be used to detect defects such as cracks, pores, inclusions, etc. on the surface or inside of the shaft.

[0036] like Figure 7-Figure 8As shown, a dust collecting part is arranged inside the sleeve 50201; the dust collecting part includes a dust collecting port 50204 and a dust collecting box 50206 located on the sleeve 50201; a negative pressure pump is arranged inside the dust collecting box 50206, and is connected to the dust collecting port 50204 through a dust collecting pipe 50207; the automobile axle may be contaminated before detection, and dust may adhere to the surface. The negative pressure of the dust collecting port 50204 can clean the automobile axle and reduce the detection error. Dust will be generated during grinding detection, and dust covering the ultrasonic detector 50203 will also cause detection errors, so it can also be cleaned with the help of a dust collecting part.

[0037] It should be further explained that dust collecting chambers 50205 are set on both sides of the installation groove 50202; the dust suction port 50204 is set in a circle along the sleeve 50201, and is respectively connected to the dust collecting chambers 50205 on both sides; the dust suction pipe 50207 is connected to the dust collecting chamber 50205; the dust suction port 50204 is close to the installation groove 50202, so the ultrasonic detector 50203 can also be cleaned at a close distance.

[0038] Embodiment 2: Based on the vehicle axle detection device in Embodiment 1, this embodiment proposes a vehicle axle detection method, and the detection method is as follows: Detection method 1: Pass the automobile shaft through three sets of detection inner sleeves 502 in sequence, and drive the bending rod 50302 to rotate through the driving motor 50301, so that the electric grinding roller 50303 on the outer periphery is close to the automobile shaft and fits with the shaft wall. The electric grinding roller 50303 clamps and fixes the automobile shaft from both ends; the stretching component 3 performs telescopic detection, applies tension to both ends of the automobile shaft at the same time, and gradually increases the load until it reaches the preset value or the shaft breaks; the ultrasonic detectors 50203 at both ends collect data at both ends of the automobile shaft, and the ultrasonic detector 50203 in the middle collects data in the middle of the automobile shaft.

[0039] Detection method 2: Use the rotating member 503 to fix the two ends and the middle of the automobile shaft; when performing bending detection, pull the reinforcement member 404 on the detection component 5 in the middle to apply load to the corresponding detection point, so that the automobile shaft is forced to move to one side to form a bending vertex; pull the reinforcement member 404 on the detection components 5 at both ends to apply load to the corresponding detection points, so that the automobile shaft is forced to move to the other side to form a bending end point. The ultrasonic detectors 50203 at both ends collect data at both ends of the automobile shaft, and the ultrasonic detector 50203 in the middle collects data in the middle of the automobile shaft.

[0040] Detection method three: use the rotating part 503 to fix the two ends and the middle part of the automobile shaft; when performing bending detection, the detection component 5 in the middle does not move, and the detection components 5 at both ends move in opposite directions toward the two sides of the automobile shaft, that is, the slider 2 406 moves left and right; the ultrasonic detectors 50203 at both ends collect data at both ends of the automobile shaft, and the ultrasonic detector 50203 in the middle collects data in the middle of the automobile shaft.

[0041] Detection method four: When performing torsion detection, the rotating part 503 is used to fix the automobile shaft from both ends, the gear 50601 is meshed with the connecting gear ring 50602, and the driving sleeve 50201 rotates coaxially relative to the detection outer sleeve 501. Finally, the detection inner sleeves 502 at both ends rotate in opposite directions, driving the two ends of the automobile shaft to twist; the ultrasonic detectors 50203 at both ends collect data at both ends of the automobile shaft, and the ultrasonic detector 50203 in the middle collects data in the middle of the automobile shaft.

[0042] Detection method five: When performing wear detection, the automobile shaft is fixed and clamped by a rotating part 503 from both ends, and the middle detection plate 2 moves between the detection plates 2 on both sides. The middle rotating part 503 uses an electric grinding roller 50303 to grind the automobile shaft during the movement; the dust collection part removes dust synchronously during grinding; the ultrasonic detector 50203 collects data before and after the automobile shaft is ground.

[0043] The above detection methods can be operated individually or in combination.

[0044] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A vehicle axle detection device, characterized in that: include: A stretching assembly (3), the stretching assembly (3) is located on the testing platform (1) and is arranged to be fixed in the middle and retractable at both ends; A detection plate (2), wherein the detection plate (2) is provided in three groups, one group being located on the fixed portion of the stretching component (3), and two groups being located on the telescopic portions of the stretching component (3); Adjustment components (4), the adjustment components (4) are arranged on the detection plate (2) in a one-to-one correspondence; and detection components (5), the detection components (5) being arranged one by one on the adjustment components (4) and being moved along the X and Y directions on the detection plate (2) by adjusting the position of the adjustment components (4); The detection assembly (5) comprises a detection outer sleeve (501) connected to the adjustment assembly (4) and a detection inner sleeve (502) coaxially rotating inside the detection outer sleeve (501); the interior of the detection inner sleeve (502) is for the automobile shaft to pass through and is provided with a detection end; and rotating parts (503) having grinding and clamping functions are provided at both ends of the detection inner sleeve (502).

2. The vehicle axle detection device according to claim 1, characterized in that: The stretching assembly (3) comprises a double-headed telescopic driving member (301); the double-headed telescopic driving member (301) is arranged in parallel on both sides of the detection platform (1); a slider 1 (302) is arranged on the telescopic end of each group of double-headed telescopic driving members (301); and the slider 1 (302) is connected to the detection plate (2).

3. The vehicle axle detection device according to claim 1, characterized in that: The adjustment component (4) comprises an adjustment frame (401); the adjustment frame (401) is slidably arranged on the detection plate (2) along the X direction, and a second slider (406) is arranged on the adjustment frame (401) and slides along the Y direction; the detection jacket (501) is connected to the second slider (406); and a pulling reinforcement member (404) is arranged on the adjustment frame (401) and pulls the second slider (406) to move horizontally.

4. The vehicle axle detection device according to claim 1, characterized in that: The detection inner sleeve (502) comprises a sleeve body (50201) rotatably connected to the detection outer sleeve (501); a driving member (506) for driving the detection inner sleeve (502) to rotate is provided at the end of the sleeve body (50201); A plurality of rotating members (503) are arranged along the sleeve opening of the sleeve body (50201).

5. The vehicle axle detection device according to claim 4, characterized in that: The rotating member (503) comprises a driving motor (50301) located on the sleeve (50201); a bending rod (50302) is connected to the main shaft of the driving motor (50301); and an electric grinding roller (50303) is connected to the bending rod (50302); The electric grinding roller (50303) is arranged parallel to the center line of the automobile shaft.

6. The vehicle axle detection device according to claim 4, characterized in that: A circle of mounting grooves (50202) is arranged inside the sleeve body (50201); the mounting groove (50202) is the detection end, and an ultrasonic detector (50203) is arranged inside the mounting groove (50202).

7. The vehicle axle detection device according to claim 6, characterized in that: A dust suction piece is arranged inside the sleeve (50201); the dust suction piece comprises a dust suction port (50204) and a dust collection box (50206) located on the sleeve (50201); a negative pressure pump is arranged inside the dust collection box (50206) and is connected to the dust suction port (50204) via a dust suction pipe (50207).

8. The vehicle axle detection device according to claim 7, characterized in that: Dust collecting chambers (50205) are arranged on both sides of the installation groove (50202); a dust suction port (50204) is arranged in a circle along the inside of the sleeve (50201) and is respectively connected to the dust collecting chambers (50205) on both sides; and a dust suction pipe (50207) is connected to the dust collecting chamber (50205).

9. A method for detecting an automobile axle, characterized in that: Using the automobile axle detection device described in claim 1, the detection steps are as follows: S1, passing the automobile axle through three sets of detection inner sleeves (502) in sequence; S2, detection method 1: using the rotating member (503) to fix the automobile shaft from both ends and clamp it; the stretching assembly (3) stretches and presses the automobile shaft to perform a telescopic test; Testing method 2: using a rotating member (503) to fix the automobile shaft at three points; the middle testing component (5) moves toward one side of the automobile shaft, and the two end testing components (5) move toward the other side of the automobile shaft to perform bending testing; Detection method three: using a rotating member (503) to fix the automobile shaft at three points; the detection component (5) in the middle remains stationary, and the detection components (5) at both ends move in opposite directions toward the two sides of the automobile shaft to perform bending detection; Detection method 4: Using rotating parts (503) to clamp the automobile shaft from both ends, the detection inner sleeves (502) at both ends rotate in opposite directions to perform torsion detection; Detection method five: using a rotating member (503) to fix the automobile shaft at both ends, the detection plate (2) in the middle moves between the detection plates (2) on both sides, and the rotating member (503) in the middle grinds the automobile shaft during the movement to perform wear detection; S3. The detection end collects the detection data of the automobile shaft to determine the deformation and fracture resistance of the automobile shaft when subjected to torsion, bending, tension, compression and wear.

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