A bending durability test device for automobile transmission shaft

Abstract

The present invention discloses a vehicle transmission shaft bending durability test device, which specifically relates to the field of vehicle transmission shaft test technology, including a base and a test bench arranged above the base, two support members are installed between the test bench and the base, a test mechanism is installed on the test bench, and a random test mechanism is installed between the lower surface of the test bench and one of the support members. Under the linkage of the random test mechanism, the present invention enables the trigger component to complete the triggering with the second fixing seat in a rotating manner, simulating the vibration of the transmission shaft body in the running state, the test frequency of the trigger component can be driven and controlled by the rotating component, and the triggering strength of multiple trigger components is different, which can complete the random switching of the transmission shaft body in the running state, which is beneficial to the improvement and upgrading of the transmission shaft body, and at the same time, the test times of each steel ball part on multiple trigger components are recorded by the recording mechanism, reducing the difficulty of subsequent maintenance.

Description

Technical Field

[0001] The invention relates to the technical field of automobile transmission shaft testing, in particular to an automobile transmission shaft bending durability testing device. Background Art

[0002] The automobile transmission shaft is one of the important parts of the automobile engine. It is mainly composed of the driving shaft, the driven shaft, the telescopic sleeve and the universal joint fork, which can transmit the power generated by the engine to the wheels.

[0003] The drive shaft will be affected by various complex torques and vibrations during operation, which may cause the drive shaft to bend. At this time, the bent drive shaft can easily cause the whole vehicle to shake and whistle when driving at high speed. Severe failures may cause serious faults such as tearing of related parts such as the gearbox housing, flywheel housing, and clutch housing. Therefore, the drive shaft must have sufficient strength and durability. After the drive shaft is produced, it is necessary to carry out simulation tests using a test device to obtain the drive shaft's limit data.

[0004] A vehicle transmission shaft bending durability test structure disclosed in a patent application with reference publication number CN118464443A can simulate vibrations of different amplitudes of a vehicle during driving through a rotating disk, a steel ball, a top block, a lifting rod and a second fixed seat, so that the endurance test data is closer to the actual application scenario data and the experimental test data is more accurate.

[0005] The above test device can well complete the test work of the automobile transmission shaft through the effect of the steel ball, but the steel ball of the above test device needs to be discharged from the mixing barrel and dropped into the placement tank, and then the simulation test work is carried out. The overall test process is too cumbersome and complicated, and the subsequent maintenance is difficult. At the same time, there are accidental risks in the process of the steel ball being discharged, entering the placement tank, and the subsequent recycling process. The steel ball is very likely to fall and cause safety accidents, and the restriction effect of the steel ball is not ideal. The steel ball is easily squeezed and separated from the detection position during the test, and the safety is poor.

[0006] Moreover, the test device cannot record the usage status of the tested steel balls in real time. Therefore, during random operation, the long-term worn steel balls further increase the risk of falling off, and the worn steel balls will interfere with the test data, resulting in a decrease in detection accuracy, making it impossible to obtain the limit data of the drive shaft, which is not conducive to the subsequent structural improvement and upgrading of the drive shaft. Summary of the invention

[0007] The purpose of the present invention is to provide a vehicle transmission shaft bending durability test device to solve the above technical problems.

[0008] To solve the above technical problems, the present invention is implemented through the following technical solutions.

[0009] The present invention is a vehicle transmission shaft bending durability test device, comprising a base and a test bench arranged above the base, two supporting members are installed between the test bench and the base, a test mechanism is installed on the test bench, a random test mechanism is installed between the lower surface of the test bench and one of the supporting members, the random test mechanism cooperates with the test mechanism, the random test mechanism consists of a rotating component and a plurality of trigger components, the rotating component is assembled on one side of the lower surface of the test bench, a plurality of trigger components are assembled and installed on the rotating component to complete the rotation, and the workstations of the plurality of trigger components can complete the movement and adjustment, the plurality of trigger components can provide vibrations of different amplitudes to the test mechanism, and a recording mechanism is added to the random test mechanism, the recording mechanism is used to complete the synchronous recording operation of the states of the plurality of trigger components.

[0010] Furthermore, the testing mechanism includes a No. 1 fixing seat and a No. 2 fixing seat. The No. 1 fixing seat is detachably fixed on one side of the upper surface of the testing bench, and the No. 2 fixing seat is slidably installed on the testing bench. A sensing arm is fixedly installed in the middle position of the lower surface of the No. 2 fixing seat, and a trigger head is installed at the bottom of the sensing arm, and a reset spring is provided on the outside of the sensing arm.

[0011] Furthermore, a test motor is installed on the upper surface of the test bench at one side of the No. 1 fixing seat, and a transmission shaft body is jointly restricted on the No. 1 fixing seat and the No. 2 fixing seat.

[0012] Furthermore, the rotating assembly includes a vertical table installed on the lower surface of the test bench, a spline shaft is rotatably installed between the vertical table and one of the supports, a rotating motor connected to the spline shaft is installed on the side wall of the vertical table through a bracket, and an electric push rod is installed at the bottom of the vertical table.

[0013] Furthermore, each trigger assembly includes a truncated cone, and the truncated cones of multiple trigger assemblies are connected in parallel and at intervals. A circular track is detachably fixed to the side wall of the truncated cone near the electric push rod, and a sliding block is slidably engaged in the circular track. The sliding block is transmission-connected to the output end of the electric push rod. Multiple open grooves are arranged in a circular array around the truncated cone, and steel ball seats are slidably engaged in the multiple open grooves, and steel ball parts are rotatably installed on the top of the steel ball seats. Limit seats are installed at the bottom of the multiple open grooves below the steel ball seats, and two open areas are symmetrically extended on both sides of each open groove. Two support ears are symmetrically installed on both sides of the steel ball seat, and the two support ears extend correspondingly and slide into the two open areas. Blocking members are slidably installed on the top of the two open areas, and the steel ball seat is restricted in the open groove by the cooperation of the blocking member and the support ears. Reinforcement members are installed on one side of the bottom of the two open areas.

[0014] Furthermore, each blocking member includes a blocking plate that is slidably inserted into the top of the open area, and the lower surface of the blocking plate is in contact with the upper surface of the support ear. At the same time, a sliding area is hidden on the round platform on one side of the open area, and a slider is slidably installed in the sliding area. The slider is fixedly connected to the lower surface of the blocking plate, and a No. 1 spring is installed between the side wall of the slider and the sliding area.

[0015] Furthermore, each reinforcement member includes a counterweight block slidably installed on one side of the bottom of the open area, a No. 2 spring is installed between the lower surface of the counterweight block and the bottom of the open area, a sliding seat is slidably installed on the top of the open area, two No. 3 springs are installed between the two sides of the back of the sliding seat and the open area, an insertion rod is installed on the side of the sliding seat facing the blocking plate, a positioning groove is installed on the side of the side wall of the blocking plate facing the sliding seat, a wedge block is installed on the top of the counterweight block, and an inclined surface is provided on the side of the sliding seat away from the blocking plate.

[0016] Furthermore, the recording mechanism includes an annular cavity concentrically sleeved on the outside of the spline shaft, an annular baffle is rotatably installed at the front end of the annular cavity, a paint box is installed on the inner wall of the support below the annular cavity, and a plurality of metal telescopic tubes are arranged in a circular array on the annular baffle.

[0017] Furthermore, the front ends of the multiple metal telescopic tubes are connected to a main pipe installed, and the multiple main pipes extend to one side of the open grooves on the multiple truncated tables respectively. A trigger member is installed at the bottom of each open groove, and the trigger member drives the steel ball seat to separate from the limit seat. The trigger member is respectively linked with the main pipe and the steel ball seat, and the recording operation is completed by squeezing the trigger member by the steel ball seat.

[0018] Furthermore, each trigger member includes an extrusion cylinder, in which a piston rod is installed in a sliding seal, the top of the piston rod slides through the limit seat and contacts the lower surface of the steel ball seat, and a trigger spring is sleeved on the outside of the piston rod, a No. 1 pipe is installed on one side of the bottom of the extrusion cylinder, and a No. 2 pipe is installed on the other side of the bottom of the extrusion cylinder, and the No. 1 pipe is connected to the main pipe through a pipeline, and a recording tank is installed on one side of each open slot through a bracket.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention is provided with a random test mechanism, so that the trigger component completes the triggering with the second fixing seat in a rotating manner, simulating the vibration of the transmission shaft body in the running state, and can complete the position adjustment of multiple trigger components through the push of the electric push rod, so as to complete the random switching of the transmission shaft body in the running state, and can complete targeted simulation tests for the actual operating environment of the transmission shaft body, so as to obtain the limit data of the transmission shaft body, which is beneficial to the improvement and upgrading of the transmission shaft body and can know the defects of the transmission shaft; the present invention is provided with a recording mechanism, when the steel ball piece is subjected to a single vibration impact, the extrusion cylinder is synchronously linked to complete a recording work, and then each steel ball piece corresponds to the recording tank. The use frequency of the steel ball parts can be quickly known by the liquid level height. The recording mechanism completes the record of the test times of each steel ball part on multiple trigger components, and can quickly maintain and replace the steel ball parts with too many tests, reducing the difficulty of subsequent maintenance. At the same time, it ensures the test accuracy of the random test mechanism and avoids the damage of the steel ball parts from interfering with the test accuracy. The present invention is provided with a test mechanism, and the transmission shaft body is sleeved on the No. 1 fixing seat and the No. 2 fixing seat. The test motor is subsequently connected to the transmission shaft body so that the transmission shaft body rotates to complete the simulation test, and the No. 2 fixing seat adopts a movable design, which moves the trigger head and the No. 2 fixing seat to simulate the vibration impact of the transmission shaft body in operation. Of course, any product implementing the present invention does not necessarily need to achieve all the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is the overall front view of the present invention;

[0022] Figure 2 It is a schematic diagram of the testing mechanism of the present invention;

[0023] Figure 3 A schematic diagram of installing the random test mechanism of the present invention on a test bench;

[0024] Figure 4 It is a schematic diagram of installing the random test mechanism of the present invention on a support member;

[0025] Figure 5 It is a schematic diagram of the distribution of random test institutions and test institutions of the present invention;

[0026] Figure 6 It is a schematic diagram of the distribution of the trigger head and the random test mechanism of the present invention;

[0027] Figure 7 A schematic diagram of a randomized trial mechanism of the present invention;

[0028] Figure 8 It is a schematic diagram of the distribution of multiple trigger components of the present invention;

[0029] Fig. 9A schematic diagram of the distribution of the trigger assembly and the annular cavity of the present invention;

[0030] Fig.10 It is a schematic diagram of the recording mechanism of the present invention;

[0031] Fig.11 It is a schematic diagram of installing the trigger member of the present invention in an open slot;

[0032] Fig.12 It is a schematic diagram of installing the blocking plate of the present invention in an open area;

[0033] Fig.13 It is a schematic diagram of the distribution of the insertion rod and the positioning groove of the present invention;

[0034] Fig.14 It is a schematic diagram of the separation of the wedge block and the inclined plane of the present invention;

[0035] Fig.15 This is a schematic diagram of installing the counterweight block of the present invention in an open area.

[0036] In the figure: 1, base; 2, test bench; 3, support; 4, No. 1 fixed seat; 5, No. 2 fixed seat; 6, sensing arm; 7, trigger head; 8, reset spring; 9, test motor; 10, transmission shaft body; 11, guide rod; 12, vertical table; 13, spline shaft; 14, rotating motor; 15, electric push rod; 16, round table; 17, circular track; 18, sliding block; 19, open groove; 20, steel ball seat; 21, steel ball piece; 22, limit seat; 23, open area; 24, support ear; 25, blocking member; 251, blocking plate; 252, sliding area; 2 53. Slider; 254. Spring No. 1; 26. Reinforcement; 261. Counterweight; 262. Spring No. 2; 263. Slide; 264. Spring No. 3; 265. Rod; 266. Positioning groove; 267. Friction plate; 268. Wedge block; 269. Inclined surface; 27. Annular cavity; 28. Annular baffle; 29. ​​Paint box; 30. Metal telescopic tube; 31. Main tube; 32. Trigger; 321. Extrusion cylinder; 322. Piston rod; 323. Trigger spring; 324. Tube No. 1; 325. Tube No. 2; 326. Recording tank; 327. Tube No. 3. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0038] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0039] Embodiment 1: The present invention provides a technical solution: Figures 1 to 15 As shown, a vehicle transmission shaft bending durability test device comprises a base 1 and a test bench 2 arranged above the base 1, two support members 3 are installed between the test bench 2 and the base 1, a controller is installed on one side of one of the support members 3, the controller establishes connections with the test mechanism, the random test mechanism and the recording mechanism to complete the control, a test mechanism is installed on the test bench 2, a random test mechanism is installed between the lower surface of the test bench 2 and one of the support members 3, the random test mechanism cooperates with the test mechanism, the random test mechanism consists of a rotating component and a plurality of trigger components, the rotating component is assembled on one side of the lower surface of the test bench 2, a plurality of trigger components are assembled and installed on the rotating component to complete the rotation, and the stations of the plurality of trigger components can complete the movement adjustment, the plurality of trigger components can provide vibrations of different amplitudes to the test mechanism, and a recording mechanism is added to the random test mechanism, the recording mechanism is used to complete the synchronous recording operation of the states of the plurality of trigger components;

[0040] In the embodiment of the present invention, the test mechanism includes a No. 1 fixing seat 4 and a No. 2 fixing seat 5. Both the No. 1 fixing seat 4 and the No. 2 fixing seat 5 are composed of two semicircular seats, and the two semicircular seats are connected by a detachable structure. The No. 1 fixing seat 4 is detachably fixedly installed on one side of the upper surface of the test bench 2, and the No. 2 fixing seat 5 is slidably installed on the test bench 2. A sensing arm 6 is fixedly installed at the middle position of the lower surface of the No. 2 fixing seat 5. The sensing arm 6 is correspondingly slid through the test bench 2, and a trigger head 7 is detachably fixedly installed at the bottom of the sensing arm 6, and a trigger head 7 is detachably fixedly installed on the outside of the sensing arm 6. A reset spring 8 is sleeved and located between the top of the trigger head 7 and the lower surface of the test bench 2. The reset spring 8 pulls the No. 2 fixing seat 5 to reset and fit the test bench 2. A test motor 9 is installed on the upper surface of the test bench 2 on one side of the No. 1 fixing seat 4. A transmission shaft body 10 is detachably restricted on the No. 1 fixing seat 4 and the No. 2 fixing seat 5, and the transmission shaft body 10 is transmission-connected to the test motor 9. Two guide rods 11 are symmetrically installed on the lower surface of the No. 2 fixing seat 5, and the two guide rods 11 slide through the test bench 2 correspondingly;

[0041] It is worth noting that: when conducting the test: by providing a testing mechanism, the transmission shaft body 10 is mounted on the No. 1 fixing seat 4 and the No. 2 fixing seat 5, and then the test motor 9 is connected to the transmission shaft body 10, so that the transmission shaft body 10 rotates to complete the simulation test, which is conducive to subsequent testing.

[0042] Among them, electrical components such as the electric push rod 15, the test motor 9, and the rotating motor 14 are all connected to switches through wires, and the switches are electrically connected to a controller. The specific structure of the controller is not limited. Absolute encoders are installed on the test motor 9 and the rotating motor 14 for accurately positioning the test motor 9 and the rotating motor 14.

[0043] Embodiment 2: Based on the random test institution provided in Embodiment 1, this embodiment provides a further technical solution for the random test institution.

[0044] like Figures 3 to 9 and Figures 12 to 15 As shown, the rotating assembly includes a vertical table 12 mounted on the lower surface of the test bench 2, a spline shaft 13 is rotatably mounted between the vertical table 12 and one of the supporting members 3, a rotating motor 14 connected to the spline shaft 13 is installed on the side wall of the vertical table 12 through a bracket, and an electric push rod 15 is installed at the bottom of the vertical table 12;

[0045] In the embodiment of the present invention, each trigger assembly includes a truncated table 16, which is slidably sleeved on the spline shaft 13, and the inner wall of the truncated table 16 is provided with a spline groove that matches the spline shaft 13, so that the truncated table 16 can move on the spline shaft 13, and the truncated tables 16 of multiple trigger assemblies are detachably fixedly connected side by side at intervals, and a circular track 17 is detachably fixed on the side wall of the truncated table 16 close to the electric push rod 15. The circular track 17 is concentrically arranged with the truncated table 16, and a sliding block 18 is slidably engaged in the circular track 17. The sliding block 18 is transmission-connected to the output end of the electric push rod 15. A plurality of open grooves 19 are provided in a circular array around the truncated table 16, and a steel ball seat 20 is slidably engaged in the plurality of open grooves 19, and a steel ball piece 21 is rotatably installed on the top of the steel ball seat 20, and the bottom of the plurality of open grooves 19 is located at the steel ball seat 20 A limit seat 22 is installed at the bottom. The sizes of the steel ball parts 21 on the multiple trigger components are different. Such a design enables the multiple trigger components to provide vibration tests of different amplitudes for the test mechanism, which is conducive to the subsequent random switching simulation. Two open areas 23 are symmetrically extended on both sides of each open slot 19, and two ears 24 are symmetrically installed on both sides of the steel ball seat 20. The two ears 24 slide and extend into the two open areas 23 accordingly. A blocking member 25 is slidably installed on the top of the two open areas 23. The blocking member 25 is used to complete the restriction on the top of the open area 23. The steel ball seat 20 is restricted in the open slot 19 through the cooperation of the blocking member 25 and the ears 24. At the same time, a reinforcing member 26 is installed on one side of the bottom of the two open areas 23. The reinforcing member 26 is used to complete the reinforcement restriction on the blocking member 25;

[0046] It is worth noting that: when conducting a random test: a random test mechanism is provided, first the rotating motor 14 is started to drive the spline shaft 13 and multiple trigger components to complete a circular rotation, so that the steel ball pieces 21 on the multiple trigger components can cyclically contact the trigger head 7, and push the trigger head 7 and the second fixing seat 5 to move up to simulate the vibration impact of the running state of the transmission shaft body 10. Subsequently, the reset spring 8 pulls the second fixing seat 5 to reset, and a test is completed. At the same time, the guide rod 11 can guide the No. 2 fixing seat 5 to move up and down. Since the sizes of the steel ball pieces 21 on the multiple trigger components are different, it is only necessary to start the electric push rod 15 to push multiple The truncated table 16 on each trigger assembly slides on the spline shaft 13 to complete the position adjustment, so that the steel ball pieces 21 of different sizes randomly contact with the trigger head 7 to complete the impact, and the truncated table 16 can rotate freely, so that the multiple steel ball pieces 21 set on each truncated table 16 can cyclically contact with the trigger head 7 to complete the vibration impact, so that the electric push rod 15 can complete the random control according to the operating environment of the transmission shaft body 10, the structure is simple, the operation is stable, and the number of rotations of the rotating motor 14 and the number of extensions and retractions of the electric push rod 15 are recorded, and the test limit number of the transmission shaft body 10 can be obtained, so that the overall test work can be carried out safely and stably;

[0047] Each blocking member 25 includes a blocking plate 251 that is slidably installed on the top of the open area 23. One end of the blocking plate 251 slides through the side wall of the truncated cone 16, and the other end of the blocking plate 251 is correspondingly engaged with one side of the inner wall of the open area 23. A handle is added to the side where the blocking plate 251 passes through the truncated cone 16. The lower surface of the blocking plate 251 fits with the upper surface of the support ear 24. At the same time, a sliding area 252 is hidden on the truncated cone 16 and located on one side of the open area 23. A slider 253 is slidably installed in the sliding area 252. The slider 253 is fixedly connected to the lower surface of the blocking plate 251. A No. 1 spring 254 is installed between the side wall of the slider 253 and the sliding area 252. The No. 1 spring 254 is used to push the blocking plate 251 to extend into the open area 23 to complete the restriction.

[0048] It is worth noting that when the steel ball part 21 is disassembled: the steel ball seat 20 is pushed into the open groove 19, and the support ear 24 thereon is correspondingly restricted in the open area 23. Under normal circumstances, the blocking plate 251 is pushed into the open area 23 by the No. 1 spring 254, and the top of the open area 23 is blocked by the blocking plate 251 to prevent the steel ball seat 20 from escaping from the open groove 19. When the steel ball seat 20 needs to be separated later, it is only necessary to pull the blocking plate 251 to compress the No. 1 spring 254 so that the blocking plate 251 moves out of the open area 23. At this time, the steel ball seat 20 can be smoothly taken out of the open groove 19, which is convenient for the technicians to replace and maintain later. In order to improve the stability of the blocking plate 251 under the test state, the spline shaft 13 drives the round table 16 to rotate in a circle, so that the counterweight block 261 obtains centrifugal force, and the counterweight block 2 61 overcomes the upward movement of the second spring 262, and the linkage wedge block 268 moves upward to squeeze the inclined surface 269, so that the slide 263 overcomes the movement of the third spring 264. At this time, the plug rod 265 is correspondingly inserted into the positioning groove 266, which can reinforce the blocking plate 251 to prevent it from falling off, and at the same time ensure the stability of the steel ball 21 in the test state. At this time, the friction plate 267 is squeezed by the slide 263 and frictionally contacts the side wall of the blocking plate 251, further improving the stability. At the same time, when the rotation speed of the round table 16 increases, the greater the squeezing force applied by the friction plate 267 to the blocking plate 251, the stability is improved. When the test is stopped later, the slide 263 is pulled back to its original position by the third spring 264, and the counterweight block 261 is pulled back to its original position by the second spring 262. At this time, the plug rod 265 moves out of the positioning groove 266, which is convenient for subsequent maintenance by technical personnel;

[0049] Among them, each reinforcement 26 includes a counterweight block 261 slidably installed on one side of the bottom of the open area 23, and a No. 1 track is opened on one side of the inner wall of the open area 23 for limiting the up and down sliding of the counterweight block 261, and a No. 2 spring 262 is installed between the lower surface of the counterweight block 261 and the bottom of the open area 23. The No. 2 spring 262 is used to pull the counterweight block 261 to reset toward the bottom of the open area 23, and a slide seat 263 is slidably installed at the top of the open area 23. A No. 2 track is opened on the top of the inner wall of the open area 23 for limiting the left and right sliding of the slide seat 263. The slide seat 263 slides close to the blocking plate 251 and away from the blocking plate 251 under the restriction of the No. 2 track, and two No. 3 springs 264 are installed between the two sides of the back of the slide seat 263 and the open area 23. The two No. 3 springs 264 are used to pull the slide seat 263 away from the blocking plate 251 moves, an insertion rod 265 is installed on the side of the slide 263 facing the blocking plate 251, and a positioning groove 266 is installed on the side of the side wall of the blocking plate 251 facing the slide 263, the insertion rod 265 can be inserted into the positioning groove 266 to complete the restriction, and the size of the positioning groove 266 is larger than the size of the insertion rod 265, and two friction plates 267 are symmetrically installed on both sides of the insertion rod 265 at the front end of the slide 263, and the two friction plates 267 can be in friction contact with the side wall of the blocking plate 251, a wedge block 268 is installed on the top of the counterweight block 261, and an inclined surface 269 is provided on the side of the slide 263 away from the blocking plate 251, the inclined surface 269 is coordinated with the wedge block 268, and the upward movement of the wedge block 268 squeezes the inclined surface 269 to link the insertion rod 265 to insert into the positioning groove 266, at this time, the friction plate 267 is in friction contact with the side wall of the blocking plate 251.

[0050] Embodiment 3: Based on the recording mechanism provided in Embodiment 1, this embodiment provides a further technical solution for the recording mechanism.

[0051] like Fig.10 and Fig.11As shown, the recording mechanism includes an annular cavity 27 concentrically sleeved on the outside of the spline shaft 13, the annular cavity 27 is installed on the inner wall of one of the supports 3, an annular baffle 28 is rotatably installed at the front end of the annular cavity 27, and a paint box 29 is installed on the inner wall of the support 3 below the annular cavity 27, a feeding port is installed on one side of the top of the paint box 29, and a feeding pipe is installed in the paint tank, the feeding pipe is interconnected with the annular cavity 27 through a pipeline, and a plurality of metal telescopic tubes 30 are arranged in a circular array on the annular baffle 28, and the plurality of metal telescopic tubes 30 are composed of a No. 1 metal tube and a No. 2 metal tube, and the No. 2 metal tube is drawn and arranged in the No. 1 metal tube to complete the length adjustment of the metal telescopic tube 30, and the plurality of metal telescopic tubes 30 pass through the annular baffle 28 and the annular cavity 27 are interconnected, and the front ends of the multiple metal telescopic tubes 30 are connected and installed with a main pipe 31, which is made of metal material, and the main pipe 31 is detachably fixedly connected to the front ends of the metal telescopic tubes 30, and the main pipe 31 is installed in the multiple open grooves 19 through a bracket, and the main pipe 31 is connected to the multiple open grooves 19 with a detachable structure, the number of the multiple metal telescopic tubes 30 is consistent with the number of the multiple open grooves 19, and the multiple main pipes 31 extend to one side of the open grooves 19 on the multiple truncated cones 16, and a trigger member 32 is installed at the bottom of each open groove 19, the trigger member 32 drives the steel ball seat 20 to separate from the limit seat 22, and the trigger member 32 is respectively linked with the main pipe 31 and the steel ball seat 20, and the recording operation is completed by squeezing the trigger member 32 by the steel ball seat 20;

[0052] It is worth noting that when recording: a recording mechanism is provided, the paint is first fed into the paint box 29, the feed tube is communicated with the annular cavity 27, and at the same time, multiple metal telescopic tubes 30 follow the annular baffle 28 to rotate on the annular cavity 27, so that the paint in the annular cavity 27 can be quickly fed into multiple trigger components 32 through the metal telescopic tubes 30 and the main pipe 31, and at the same time, the metal telescopic tubes 30 can complete telescopic compensation for the positions of multiple trigger components, and the top of the piston rod 322 of the trigger component 32 contacts the steel ball seat 20, and is limited by the trigger spring 323, so that the bottom of the steel ball seat 20 is separated from the limit seat 22 by a distance, and then when the steel ball piece 21 on the corresponding steel ball seat 20 contacts the trigger head 7, the steel ball piece 21 first obtains the downward pressure provided by the trigger head 7, so that the steel ball seat 20 moves down to squeeze the piston rod 322 until the steel ball seat 20 contacts the limit seat 22 to complete the support and no longer moves down, and the piston rod 322 moves down. During the movement, the pigment in the extrusion cylinder 321 is discharged through the No. 2 pipe 325, and then sent to the recording tank 326 through the No. 3 pipe 327 for collection. After the impact test, the trigger spring 323 pushes the piston rod 322 to reset, and at the same time pushes the steel ball seat 20 to move up and reset. Under this action, the piston rod 322 sucks the pigment in the main pipe 31 into the extrusion cylinder 321 through the No. 1 pipe 324 during the upward movement. Therefore, when the steel ball part 21 is subjected to a single vibration impact, the extrusion cylinder 321 is synchronously linked to complete a recording work. Subsequently, the use frequency of the steel ball part 21 can be quickly known through the liquid level height of the pigment in the recording tank 326 corresponding to each steel ball part 21, which is conducive to the subsequent targeted maintenance by the technical personnel, avoiding the interference of the test accuracy caused by the excessive use of a small amount of steel ball parts 21 in the random test, thereby improving the test accuracy. Finally, the pigment in each recording tank 326 is taken out through the No. 4 pipe and returned to the pigment box 29 for recycling.

[0053] In the embodiment of the present invention, each trigger member 32 includes an extrusion cylinder 321 with an open top design, the extrusion cylinder 321 is installed at the bottom of the open groove 19, a retaining ring is detachably installed on the top of the extrusion cylinder 321, and the position of the piston rod 322 is limited by the retaining ring, and the piston rod 322 is installed with a sliding seal in the extrusion cylinder 321, and a telescopic head can be added at the top of the piston rod 322, and the length of the piston rod 322 is adjusted by the telescopic head, thereby completing the fine adjustment of the distance between the steel ball seat 20 and the limit seat 22, and the top of the piston rod 322 slides through the limit seat 22 to contact the lower surface of the steel ball seat 20, and a trigger spring 323 is sleeved on the outside of the piston rod 322, and the trigger spring 323 is detachably fixedly installed between the lower surface of the limit seat 22 and the bottom of the piston rod 322, and the piston rod 322 is pushed toward The steel ball seat 20 is reset, and a No. 1 pipe 324 is installed on one side of the bottom of the extrusion cylinder 321, and a No. 1 one-way valve for unidirectionally introducing the pigment into the extrusion cylinder 321 is installed at the end of the No. 1 pipe 324. A No. 2 pipe 325 is installed on the other side of the bottom of the extrusion cylinder 321, and a No. 2 one-way valve for unidirectionally sending the pigment out of the extrusion cylinder 321 is installed at the end of the No. 2 pipe 325. The No. 1 pipe 324 is connected to the main pipe 31 through a pipeline, and a recording tank 326 is installed on one side of each open slot 19 through a bracket. The recording tank 326 is made of transparent material, and a scale bar is set on the surface of the recording tank 326. The bottom of the recording tank 326 is correspondingly installed with a No. 3 pipe 327 and a No. 4 pipe, and manual valves for controlling the on and off of the No. 3 pipe 327 and the No. 4 pipe are installed at the ends of the No. 3 pipe 327 and the No. 4 pipe, and the No. 3 pipe 327 is connected to the No. 2 pipe 325 through a pipeline.

[0054] The present invention provides a vehicle transmission shaft bending durability test device, and the specific working principle is as follows: first, the transmission shaft body 10 is assembled on the No. 1 fixing seat 4 and the No. 2 fixing seat 5, and then under the drive of the test mechanism, the transmission shaft body 10 is rotated to complete the simulated running state, and the No. 2 fixing seat 5 can move up and down. Under the linkage of the random test mechanism, the trigger component is triggered with the No. 2 fixing seat 5 in a rotating manner, so that the No. 2 fixing seat 5 is pushed to move up, thereby simulating the vibration of the transmission shaft body 10 in the running state, and the test frequency of the trigger component can be driven and controlled by the rotating component, and the triggering strengths of multiple trigger components are different, so through the push of the electric push rod 15, it can be completed. The positions of multiple trigger components can be adjusted to complete random switching under the operating state of the transmission shaft body 10. Targeted simulation tests can be completed for the actual operating environment of the transmission shaft body 10 to obtain the limit data of the transmission shaft body 10, which is beneficial to the improvement and upgrading of the transmission shaft body 10 and the defects of the transmission shaft. At the same time, a recording mechanism is added to record the test times of each steel ball piece 21 on the multiple trigger components, which is beneficial to the subsequent maintenance of technical personnel and can quickly perform maintenance and replacement on the steel ball piece 21 with too many tests, thereby reducing the difficulty of subsequent maintenance and improving maintenance efficiency. At the same time, the test accuracy of the random test mechanism is guaranteed to avoid interference with the test accuracy caused by damage to the steel ball piece 21.

[0055] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0056] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A vehicle transmission shaft bending durability test device, comprising a base (1) and a test bench (2) arranged above the base (1), two support members (3) being installed between the test bench (2) and the base (1), characterized in that: A testing mechanism is installed on the test bench (2), and a random testing mechanism is installed between the lower surface of the test bench (2) and one of the supporting members (3), and the random testing mechanism and the testing mechanism are coordinated and linked; The random test mechanism is composed of a rotating component and a plurality of trigger components. The rotating component is assembled on one side of the lower surface of the test bench (2). The plurality of trigger components are assembled and mounted on the rotating component to complete rotation. The positions of the plurality of trigger components can complete movement adjustment. The plurality of trigger components can provide vibrations of different amplitudes to the test mechanism. A recording mechanism is added to the random test mechanism. The recording mechanism is used to complete synchronous recording operation of the states of the plurality of trigger components. The test mechanism comprises a No. 1 fixing seat (4) and a No. 2 fixing seat (5), wherein the No. 1 fixing seat (4) is detachably fixedly mounted on one side of the upper surface of the test bench (2), the No. 2 fixing seat (5) is slidably mounted on the test bench (2), a sensing arm (6) is fixedly mounted at the middle position of the lower surface of the No. 2 fixing seat (5), a trigger head (7) is mounted at the bottom of the sensing arm (6), and a reset spring (8) is sleeved on the outside of the sensing arm (6); A test motor (9) is installed on the upper surface of the test bench (2) at one side of the No. 1 fixing seat (4), and a transmission shaft body (10) is constrained on the No. 1 fixing seat (4) and the No. 2 fixing seat (5); The rotating assembly comprises a vertical platform (12) mounted on the lower surface of the test bench (2), a spline shaft (13) rotatably mounted between the vertical platform (12) and one of the supporting members (3), a rotating motor (14) drivingly connected to the spline shaft (13) mounted on the side wall of the vertical platform (12) via a bracket, and an electric push rod (15) mounted at the bottom of the vertical platform (12); Each trigger assembly comprises a truncated table (16), the truncated tables (16) of the plurality of trigger assemblies are connected side by side and spaced apart, a circular track (17) is detachably fixed to the side wall of the truncated table (16) on the side close to the electric push rod (15), a sliding block (18) is slidably engaged in the circular track (17), and the sliding block (18) is drivingly connected to the output end of the electric push rod (15); A plurality of open grooves (19) are provided in a circular array around the truncated table (16), a steel ball seat (20) is slidably engaged in each of the plurality of open grooves (19), and a steel ball member (21) is rotatably installed on the top of the steel ball seat (20), a limit seat (22) is installed at the bottom of each of the plurality of open grooves (19) and located below the steel ball seat (20), two open areas (23) are symmetrically extended on both sides of each open groove (19), two ears (24) are symmetrically installed on both sides of the steel ball seat (20), the two ears (24) are correspondingly slidably extended into the two open areas (23), a blocking member (25) is slidably installed on the top of the two open areas (23), the steel ball seat (20) is limited in the open groove (19) by the cooperation of the blocking member (25) and the ears (24), and a reinforcing member (26) is installed on one side of the bottom of the two open areas (23); Each blocking member (25) comprises a blocking plate (251) slidably disposed on the top of the open area (23), the lower surface of the blocking plate (251) being in contact with the upper surface of the support ear (24), and a sliding area (252) being hidden and opened on one side of the open area (23) on the truncated table (16), a sliding block (253) being slidably mounted in the sliding area (252), the sliding block (253) being fixedly connected to the lower surface of the blocking plate (251), and a first spring (254) being mounted between the side wall of the sliding block (253) and the sliding area (252); Each reinforcement member (26) includes a counterweight block (261) slidably mounted on one side of the bottom of the open area (23); a second spring (262) is mounted between the lower surface of the counterweight block (261) and the bottom of the open area (23); a slide seat (263) is slidably mounted on the top of the open area (23); two third springs (264) are mounted between the two sides of the back of the slide seat (263) and the open area (23); a plug rod (265) is mounted on the side of the slide seat (263) facing the blocking plate (251); a positioning groove (266) is mounted on the side wall of the blocking plate (251) facing the slide seat (263); a wedge block (268) is mounted on the top of the counterweight block (261); and an inclined surface (269) is provided on the side of the slide seat (263) away from the blocking plate (251).

2. The automobile transmission shaft bending durability test device according to claim 1, characterized in that: The recording mechanism comprises an annular cavity (27) coaxially sleeved outside a spline shaft (13), an annular baffle (28) rotatably mounted at the front end of the annular cavity (27), a paint box (29) mounted on the inner wall of a support member (3) below the annular cavity (27), and a plurality of metal telescopic tubes (30) arranged in a circular array on the annular baffle (28).

3. The automobile transmission shaft bending durability test device according to claim 2, characterized in that: The front ends of the plurality of metal telescopic tubes (30) are connected to a main pipe (31) installed thereon. The plurality of main pipes (31) extend to one side of the open grooves (19) on the plurality of truncated cones (16) respectively. A triggering member (32) is installed at the bottom of each open groove (19). The triggering member (32) drives the steel ball seat (20) to separate from the limit seat (22). The triggering member (32) is respectively linked to the main pipe (31) and the steel ball seat (20). The recording operation is completed by squeezing the triggering member (32) by the steel ball seat (20).

4. The automobile transmission shaft bending durability test device according to claim 3, characterized in that: Each trigger member (32) comprises an extrusion cylinder (321), a piston rod (322) being installed in a sliding and sealing manner in the extrusion cylinder (321), the top of the piston rod (322) slidingly passing through the limit seat (22) and contacting the lower surface of the steel ball seat (20), and a trigger spring (323) being sleeved on the outside of the piston rod (322), a No. 1 pipe (324) being installed in communication at one side of the bottom of the extrusion cylinder (321), a No. 2 pipe (325) being installed in communication at the other side of the bottom of the extrusion cylinder (321), and the No. 1 pipe (324) being connected to the main pipe (31) through a pipeline, and a recording tank (326) being installed on one side of each open slot (19) through a bracket.

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