Forcing mechanism of wheel rotating bending fatigue testing machine

Abstract

The utility model relates to the technical field of wheel rotating bending fatigue tests, and discloses a wheel rotating bending fatigue testing machine stress application mechanism which comprises a linear guide rail, a sliding block is arranged at the rear end of the linear guide rail, the sliding block is connected with the linear guide rail in a sliding mode, and a connecting block is fixedly connected to the rear portion of the left end of the sliding block. A bearing support is fixedly connected to the left end of the connecting block, a wheel body is arranged at the rear end of the bearing support, a conveying belt is arranged at the bottom end of the wheel body, the top of the conveying belt is attached to the bottom of the wheel body, and a rotary bending shaft is fixedly connected to the middle of the wheel body. According to the utility model, the bearing bracket can move on the linear guide rail along with the sliding block, so that the test force value is stable, the self-aligning ball bearing assembly reduces the abrasion to the rotating bending shaft while avoiding the damage of the double-bearing loading acceleration bearing, and the mounting assembly can quickly assemble and disassemble the rotating bending shaft, so that the test efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wheel rotation bending fatigue test, in particular to a force applying mechanism of a wheel rotation bending fatigue testing machine. Background Art

[0002] With the development of the automotive industry and the new motorcycle industry, higher requirements are put forward for the service life and safety performance of wheels. Special testing machines for wheel performance testing have developed greatly. Among them, the wheel rotation bending fatigue testing machine is a typical testing device, which mainly tests the fatigue performance of the wheel against torsional bending under the condition of high-speed rotation. The loading mechanism for the rotation bending shaft is the core component.

[0003] During the test, the driving wheel starts to rotate, and the rotation speed needs to be kept constant to simulate the state of the wheel during actual driving. The force applying mechanism starts to apply a fatigue load to the wheel according to the set parameters to simulate the repeated bending stress suffered by the wheel during actual use. During the test process, the control system will continuously monitor the applied load and the response of the wheel, and record the test data, such as load, displacement, rotation times, etc. The testing machine continuously applies a fatigue load to the wheel until the predetermined number of cycles is reached or the wheel shows fatigue failure. After the test, the collected data is analyzed to evaluate the fatigue life and durability of the wheel.

[0004] For the products on the market now, the loading mechanism adopts double-bearing loading. Since the rotation bending shaft has large bending changes during loading and is in a rotating state, it will generate a biasing force on the double bearings, which will cause serious wear of the shaft and large errors in test values over time. In addition, the test force applying mechanism needs to test different wheels, but some force applying mechanisms cannot quickly install the wheels, thus reducing the test efficiency. Therefore, a force applying mechanism of a wheel rotation bending fatigue testing machine is proposed to solve the above problems. Content of the Utility Model

[0005] In order to make up for the above deficiencies, the utility model provides a force applying mechanism of a wheel rotation bending fatigue testing machine, aiming to improve the problems in the prior art that double-bearing loading is easy to cause bearing damage, serious wear of the shaft and large errors in test values, and the inconvenience of installing and disassembling the wheel and the force applying mechanism leads to a reduction in test efficiency.

[0006] To achieve the above object, the utility model adopts the following technical solutions: a force applying mechanism of a wheel rotation bending fatigue testing machine, including a linear guide rail, a slider is arranged at the rear end of the linear guide rail, the slider is slidably connected with the linear guide rail, a connecting block is fixedly connected to the rear part of the left end of the slider, a bearing bracket is fixedly connected to the left end of the connecting block, a wheel body is arranged at the rear end of the bearing bracket, a conveyor belt is arranged at the bottom end of the wheel body, the top of the conveyor belt is attached to the bottom of the wheel body, a rotation bending shaft is fixedly connected to the middle of the wheel body, the front end of the rotation bending shaft is located in the middle of the bearing bracket, four fixing blocks are fixedly connected to the outer side of the rotation bending shaft at equal intervals, insertion blocks are fixedly connected to the front ends of the four fixing blocks, threaded grooves are formed at the front ends of the insertion blocks, first magnets are embedded at the front ends of the fixing blocks at the ends away from each other of the insertion blocks, a self-aligning ball bearing assembly is arranged at the inner end of the bearing bracket, the self-aligning ball bearing assembly is used for the swinging angle, an installation assembly is arranged at the inner end of the self-aligning ball bearing assembly, the installation assembly is used for fixing the rotation bending shaft and the self-aligning ball bearing assembly, a force applying push plate is fixedly connected to the right end of the connecting block, and a load sensor is fixedly connected to the outer side of the left end of the force applying push plate.

[0007] As a further description of the above technical solution: the self-aligning ball bearing assembly includes an outer ring, the outer side of the outer ring is fixedly connected with the inner side of the bearing bracket, an inner ring is arranged at the inner end of the outer ring, a plurality of activity grooves are formed at equal intervals at the outer end of the inner ring, and self-aligning balls are movably arranged in the plurality of activity grooves.

[0008] As a further description of the above technical solution: the outer side of the self-aligning ball is attached to the inner side of the outer ring, and the radius of the activity groove is slightly larger than the radius of the self-aligning ball.

[0009] As a further description of the above technical solution: the installation assembly includes an installation ring, the outer side of the installation ring is fixedly connected with the inner side of the inner ring, four slots are formed at equal intervals at the rear end of the installation ring, four second magnets are embedded at equal intervals at the rear end of the installation ring, the four second magnets are located at the outer ends of the slots and correspond to the positions of the slots, a toothed ring is rotatably connected to the front end of the installation ring inside the slots, four gears are meshed and connected at equal intervals on the inner side of the toothed ring, threaded shafts are fixedly connected to the middles of the four gears, a wireless battery motor is fixedly connected to the top of the front end of the installation ring, and an output end of the wireless battery motor is fixedly connected with a rotating shaft, and the rear end of the rotating shaft is fixedly connected with the front end of the adjacent threaded shaft.

[0010] As a further description of the above technical solution: the rear ends of the threaded shafts are all located inside the same-side slots, and the inner side of the installation ring is attached to the outer side of the rotation bending shaft.

[0011] As a further description of the above technical solution: The insertion block is snap-fitted to the same-side slot, and the threaded shaft is threadedly connected to the same-side threaded groove.

[0012] As a further description of the above technical solution: The front side of the fixed block is in contact with the rear side of the mounting ring, and the first magnet is in contact with the second magnet on the same side.

[0013] As a further description of the above technical solution: The rear end of the second magnet is the S pole, and the front end of the first magnet is the N pole.

[0014] The utility model has the following beneficial effects:

[0015] 1. In the utility model, when the wheel body is subjected to bending stress during rotation, causing the angle of the rotating bending shaft to change, the self-aligning sphere enables the inner ring to swing and deform with the rotating bending shaft for adjustment, thereby reducing the wear of the rotating bending shaft. At the same time, it also avoids the problem of double-bearing loading and accelerating the damage of one of the bearings. The bearing bracket is fixed on the slider and can move left and right along the linear guide rail with the slider, avoiding front-back swing and making the test values stable and reliable.

[0016] 2. In the utility model, by driving the wireless battery motor to rotate the rotating shaft, the upper threaded shaft and the gear are driven to rotate, causing the toothed ring to displace, thereby synchronously rotating the four threaded shafts, driving the insertion block to move outward from the slot until the threaded groove disengages from the threaded shaft, and then moving the wheel body backward to move the rotating bending shaft away from the mounting ring, so as to disassemble the wheel body. Conversely, it is convenient for the installation of the wheel body, thereby accelerating the installation and disassembly speed of the wheel body and improving the efficiency of the wheel rotating bending fatigue test. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the overall front view of the force application mechanism of the wheel rotating bending fatigue testing machine proposed by the utility model;

[0018] Figure 2 is the left front view of the left end section of the wheel of the force application mechanism of the wheel rotating bending fatigue testing machine proposed by the utility model;

[0019] Figure 3 is the disassembled view of the rotating bending shaft and the mounting ring of the force application mechanism of the wheel rotating bending fatigue testing machine proposed by the utility model;

[0020] Figure 4 is Figure 3 the enlarged view of part A in

[0021] Figure 5 is the left rear view of the left end section of the mounting ring of the force application mechanism of the wheel rotating bending fatigue testing machine proposed by the utility model.

[0022] Legend:

[0023] 1. Linear guide rail; 2. Force - adding push plate; 3. Load sensor; 4. Connecting block; 5. Slide block; 6. Bearing bracket; 7. Rotating bending shaft; 8. Wheel body; 9. Fixed block; 10. Insert block; 11. Thread groove; 12. Magnet 1; 13. Mounting ring; 14. Slot; 15. Magnet 2; 16. Tooth ring; 17. Gear; 18. Threaded shaft; 19. Wireless battery motor; 20. Rotating shaft; 21. Outer ring; 22. Inner ring; 23. Activity groove; 24. Self - aligning sphere; 25. Conveyor belt. Specific implementation mode

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] Refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown in, an embodiment provided by the present utility model: a force - adding mechanism for a wheel rotating bending fatigue testing machine, including a linear guide rail 1. A slide block 5 is arranged at the rear end of the linear guide rail 1. The slide block 5 is slidably connected to the linear guide rail 1. A connecting block 4 is fixedly connected to the rear part of the left end of the slide block 5. A bearing bracket 6 is fixedly connected to the left end of the connecting block 4. A wheel body 8 is arranged at the rear end of the bearing bracket 6. A conveyor belt 25 is arranged at the bottom end of the wheel body 8. The top of the conveyor belt 25 is in contact with the bottom of the wheel body 8. A rotating bending shaft 7 is fixedly connected to the middle of the wheel body 8. The front end of the rotating bending shaft 7 is located in the middle of the bearing bracket 6. Four fixed blocks 9 are fixedly connected to the outer side of the rotating bending shaft 7 at equal intervals. Insert blocks 10 are fixedly connected to the front ends of the four fixed blocks 9. Thread grooves 11 are formed at the front ends of the insert blocks 10. Magnets 1 12 are embedded at the front ends of the fixed blocks 9 at the ends away from the insert blocks 10. A self - aligning ball bearing assembly is arranged at the inner end of the bearing bracket 6 for swinging the angle. An installation assembly is arranged at the inner end of the self - aligning ball bearing assembly for fixing the rotating bending shaft 7 and the self - aligning ball bearing assembly. A force - adding push plate 2 is fixedly connected to the right end of the connecting block 4. A load sensor 3 is fixedly connected to the outer side of the left end of the force - adding push plate 2.

[0026] Start the conveyor belt 25 to drive the rotation of the wheel body 8, simulating the state of the wheel body 8 during actual driving. The bearing bracket 6 is fixed on the slider 5 and can move left and right along the linear guide rail 1 with the slider 5, avoiding front-back swing. The test force value is stable and reliable. Apply bending stress to the rotating bending shaft 7 through the force-applying push plate 2. The load sensor 3 can detect the fatigue load value applied by the force-applying push plate 2 to the rotating bending shaft 7. Through the self-aligning ball bearing assembly, double-bearing loading is avoided, and the problem of accelerating the damage of one of the bearings is solved. The rotating bending shaft 7 can be quickly installed and disassembled through the installation assembly, improving the efficiency of the wheel rotating bending fatigue test.

[0027] Referring to Figure 2 and Figure 3 , the self-aligning ball bearing assembly includes an outer ring 21. The outer side of the outer ring 21 is fixedly connected to the inner side of the bearing bracket 6. The inner end of the outer ring 21 is provided with an inner ring 22. A plurality of movable grooves 23 are equidistantly opened at the outer end of the inner ring 22. A plurality of self-aligning spheres 24 are movably arranged inside the plurality of movable grooves 23. The outer side of the self-aligning spheres 24 is in contact with the inner side of the outer ring 21. The radius of the movable groove 23 is slightly larger than the radius of the self-aligning sphere 24.

[0028] When the force-applying push plate 2 applies force to the left, causing the inner ring 22 to apply force to the rotating bending shaft 7, the setting of the self-aligning spheres 24 enables the inner ring 22 to have a certain swing angle function and can be adjusted as the rotating bending shaft 7 swings and deforms, and the force application is reliable.

[0029] Referring to Figure 3 , Figure 4 and Figure 5 , the installation assembly includes an installation ring 13. The outer side of the installation ring 13 is fixedly connected to the inner side of the inner ring 22. Four slots 14 are equidistantly opened at the rear end of the installation ring 13. Four magnets two 15 are equidistantly embedded at the rear end of the installation ring 13. The four magnets two 15 are located at the outer ends of the slots 14 and correspond to the positions of the slots 14. A toothed ring 16 is rotatably connected to the front end of the installation ring 13 inside the slots 14. Four gears 17 are equidistantly meshed and connected to the inner side of the toothed ring 16. Threaded shafts 18 are fixedly connected to the middle parts of the four gears 17. A wireless battery motor 19 is fixedly connected to the top of the front end of the installation ring 13. The output end of the wireless battery motor 19 is fixedly connected to a rotating shaft 20. The rear end of the rotating shaft 20 is fixedly connected to the front end of the adjacent threaded shaft 18. The rear ends of the threaded shafts 18 are all located inside the same-side slots 14. The inner side of the installation ring 13 is in contact with the outer side of the rotating bending shaft 7. The plug 10 is engaged with the same-side slot 14. The threaded shaft 18 is threadedly connected to the same-side threaded groove 11. The front side of the fixing block 9 is in contact with the rear side of the installation ring 13. The magnet one 12 is in contact with the same-side magnet two 15. The rear end of the magnet two 15 is the S pole, and the front end of the magnet one 12 is the N pole.

[0030] Align the insert block 10 with the adjacent slot 14 on the same side, and then move the wheel body 8 forward, so that the front half of the insert block 10 and the rear half of the insert block located in the slot 14 are in contact. At this time, the threaded shaft 18 enters the threaded groove 11 for a certain distance. Then start the wireless battery motor 19 to drive the rotating shaft 20, the upper threaded shaft 18 and the gear 17 to rotate. Since the gear 17 is meshed with the inner end of the toothed ring 16, when the upper gear 17 rotates, it will drive the toothed ring 16 to generate displacement, thereby driving the other three gears 17 to rotate synchronously. And the thread directions of the threaded shafts 18 are the same. Therefore, when the four threaded shafts 18 rotate synchronously, the threaded shafts 18 will be threaded with the adjacent threaded grooves 11 and drive the rotating and bending shaft 7 to move forward until the insert block 10 is engaged with the adjacent slot 14, thereby fixing the rotating and bending shaft 7 and the mounting ring 13. At this time, the front side of the fixing block 9 is in contact with the rear side of the mounting ring 13, and the magnet one 12 and the magnet two 15 on the same side are magnetically attracted together, further improving the fixing stability of the rotating and bending shaft 7 and the mounting ring 13.

[0031] Working principle: Start the conveyor belt 25 to drive the wheel body 8 to rotate, simulate the state of the wheel body 8 during actual driving, and make the force-applying push plate 2 apply fatigue load to the wheel body 8 according to the set parameters to the left, simulate the repeated bending stress received by the wheel body 8 during actual use, so that the angle of the rotating and bending shaft 7 changes. The setting of the alignment sphere 24 enables the inner ring 22 to have a certain swing angle function, which can be adjusted as the rotating and bending shaft 7 swings and deforms, thereby reducing the wear of the rotating and bending shaft 7. After the simulation test of the wheel body 8 is completed, drive the wireless battery motor 19 to rotate the rotating shaft 20, thereby driving the threaded shaft 18 and the gear 17 fixed thereto to rotate, causing the toothed ring 16 to generate displacement, so that the four gears 17 drive the threaded shafts 18 to rotate synchronously, driving the insert block 10 to move outward from the slot 14 until the threaded groove 11 disengages from the threaded shaft 18, and then move the wheel body 8 backward to make the rotating and bending shaft 7 away from the mounting ring 13, thereby disassembling the wheel body 8. Conversely, install the wheel body 8 on the mounting ring 13 and the inner ring 22 to facilitate the next rotating and bending fatigue test of the wheel body 8.

[0032] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A wheel rotation bending fatigue testing machine force adding mechanism, comprising a linear guide rail (1), characterized in that: A slider (5) is provided at the rear end of the linear guide rail (1), and the slider (5) is slidably connected to the linear guide rail (1). A connecting block (4) is fixedly connected to the rear left end of the slider (5), and a bearing bracket (6) is fixedly connected to the left end of the connecting block (4). A wheel body (8) is provided at the rear end of the bearing bracket (6), and a conveyor belt (25) is provided at the bottom end of the wheel body (8). The top of the conveyor belt (25) is in contact with the bottom of the wheel body (8). A rotating bending shaft (7) is fixedly connected to the middle of the wheel body (8), and the front end of the rotating bending shaft (7) is located in the middle of the bearing bracket (6). The outer side of the rotating bending shaft (7) is fixedly connected to the rotating bending shaft (7) at an equal distance. There are four fixed blocks (9), the front ends of the four fixed blocks (9) are fixedly connected to the plug blocks (10), the front ends of the plug blocks (10) are provided with threaded grooves (11), the front ends of the fixed blocks (9) are embedded with magnets (12) at the ends away from the plug blocks (10), the inner end of the bearing bracket (6) is provided with a self-aligning ball bearing assembly, the self-aligning ball bearing assembly is used for swinging angle, the inner end of the self-aligning ball bearing assembly is provided with a mounting assembly, the mounting assembly is used to fix the rotating bending shaft (7) and the self-aligning ball bearing assembly, the right end of the connecting block (4) is fixedly connected to the force-adding thrust plate (2), and the left end of the force-adding thrust plate (2) is fixedly connected to the load sensor (3).

2. The force-adding mechanism of the wheel rotation bending fatigue testing machine according to claim 1 is characterized in that: The self-aligning ball bearing assembly comprises an outer ring (21), the outer side of the outer ring (21) is fixedly connected to the inner side of the bearing bracket (6), an inner ring (22) is arranged at the inner end of the outer ring (21), a plurality of movable grooves (23) are arranged at equal distances at the outer end of the inner ring (22), and a self-aligning ball (24) is movable inside each of the movable grooves (23).

3. The force-adding mechanism of the wheel rotation bending fatigue testing machine according to claim 2 is characterized in that: The outer side of the self-aligning sphere (24) fits into the inner side of the outer ring (21), and the radius of the movable groove (23) is slightly larger than the radius of the self-aligning sphere (24).

4. The force-adding mechanism of the wheel rotation bending fatigue testing machine according to claim 1 or 2, characterized in that: The mounting assembly comprises a mounting ring (13), the outer side of the mounting ring (13) being fixedly connected to the inner side of the inner ring (22), the rear end of the mounting ring (13) being provided with four slots (14) at equal distances, the rear end of the mounting ring (13) being embedded with four magnets (15) at equal distances, the four magnets (15) being located at the outer ends of the slots (14) and corresponding to the positions of the slots (14), the interior of the mounting ring (13) being rotatably connected to a gear ring (16) at the front end of the slot (14), the inner side of the gear ring (16) being meshingly connected with four gears (17) at equal distances, the middle parts of the four gears (17) being fixedly connected to threaded shafts (18), the top of the front end of the mounting ring (13) being fixedly connected to a wireless battery motor (19), the output end of the wireless battery motor (19) being fixedly connected to a rotating shaft (20), the rear end of the rotating shaft (20) being fixedly connected to the front end of an adjacent threaded shaft (18).

5. The force-adding mechanism of the wheel rotation bending fatigue testing machine according to claim 4, characterized in that: The rear ends of the threaded shafts (18) are located inside the slots (14) on the same side, and the inner side of the mounting ring (13) fits against the outer side of the rotating bending shaft (7).

6. The force-adding mechanism of the wheel rotation bending fatigue testing machine according to claim 4, characterized in that: The insert block (10) is snap-connected with the slot (14) on the same side, and the threaded shaft (18) is threadedly connected with the threaded groove (11) on the same side.

7. The force-adding mechanism of the wheel rotation bending fatigue testing machine according to claim 4, characterized in that: The front side of the fixing block (9) is in contact with the rear side of the mounting ring (13), and the first magnet (12) is in contact with the second magnet (15) on the same side.

8. The force-adding mechanism of the wheel rotation bending fatigue testing machine according to claim 4, characterized in that: The rear end of the second magnet (15) is an S pole, and the front end of the first magnet (12) is an N pole.

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