Balanced elbow fatigue test device

Abstract

The utility model provides a balance elbow fatigue test device. The device comprises a transmission device, a driving wheel, a crawler belt, a loading wheel, a guide wheel, a crawler belt adjuster, a pavement motion simulation device, a rack, a torsion bar spring, a balance elbow support, a torsion bar support, a guide wheel support and a driving wheel support. According to the utility model, stress simulation of the balance elbow during vehicle driving can be realized, and whether the balance elbow meets technical requirements is determined by testing the fatigue life of the balance elbow. According to the test device, the balance elbow does not need to be installed on a whole vehicle, and a real environment road surface can be simulated. Compared with the traditional test mode, the device has the advantages of obvious effect, short test period and low cost, and can effectively shorten the research and development period of new products and reduce the cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle manufacturing, and particularly relates to a balance elbow fatigue test device. Background Technique

[0002] When a tracked vehicle travels on rough ground, once it encounters bumps or obstacles with high and low undulations, the vehicle body will be subjected to vibrations or impacts. As a result, the crew is prone to fatigue, and the vehicle body parts are also prone to damage, which will affect the crew's control of the vehicle and on-vehicle equipment, and at the same time reduce the vehicle's movement speed. If the suspension device is designed to be elastic, the road wheels can roll relative to the vehicle body along the uneven ground. When the road wheels move up and down relative to the vehicle body, the torsion bar spring between the vehicle body and the road wheels will generate torsion. Due to the buffering effect of the torsion bar spring, the impact received by the vehicle body is reduced. The suspension device consists of a bracket, a torsion bar spring, a balance elbow, etc. Among them, the balance elbow is used to connect the road wheels and the torsion bar spring. With the continuous increase of national strategic needs, the equipment in the transportation field presents characteristics such as lightweight, high load, strong protection, extreme working conditions, low cost, and high reliability. The leapfrog development of the new generation of equipment puts forward new requirements for the development of materials and process technologies. And lightweight is considered to be the most direct and effective way to improve the mobility performance of vehicles. In this context, the balance elbows for vehicles often adopt materials with high specific strength for lightweight structure design. However, in order to verify its reliability, the current method is to conduct a vehicle running test. Since the driving range of the vehicle covers the entire territory, including use in various regions such as paved roads, dirt roads, and gravel roads, there are problems such as long test cycles and high costs. Therefore, developing a simulation running test method and device with a short test cycle and low cost to test the fatigue life of the balance elbow is particularly important for shortening the new product R & D cycle and reducing the R & D cost. Content of the Utility Model

[0003] (1) Technical Problems to be Solved

[0004] The utility model provides a balance elbow fatigue test device to solve the technical problem of being able to conduct reliability verification with a short cycle and low cost when the balance elbow is manufactured with a new structure, new materials, and new processes.

[0005] (2) Technical Solutions

[0006] To solve the above technical problems, the utility model provides a balance elbow fatigue test device, which includes a transmission device, a driving wheel, a crawler belt, road wheels, a guide wheel, a crawler adjuster, a road surface movement simulation device, a frame, a torsion bar spring, a balance elbow bracket, a torsion bar bracket, a guide wheel bracket, and a driving wheel bracket; among them,

[0007] The transmission device is fixed on the frame and is used to provide power for the fatigue test, capable of meeting the speed and torque requirements during the simulation of vehicle driving.

[0008] The driving wheel bracket is fixed on the frame, and the output end of the transmission device is connected to the driving wheel through the driving wheel bracket.

[0009] The balance elbow bracket is fixed on the frame. One end of the balance elbow as the test piece is fixedly connected to the balance elbow bracket through a fastener, and the other end is fixedly connected to the load wheel through a fastener.

[0010] The torsion bar bracket is fixed on the frame. One end of the torsion bar spring is inserted into the spline hole of the balance elbow by splines and fixed through a fastener, and the other end of the torsion bar spring is inserted into the spline hole of the torsion bar bracket by splines and fixed through a fastener.

[0011] The guide wheel bracket is fixed on the frame, and the guide wheel is connected to the guide wheel bracket through a fastener.

[0012] The track adjuster is fixed on the frame, used to apply a set value of pressure to the track, adjust its contact position with the track according to the change of the track tightness, and maintain the application of the set pressure.

[0013] The road surface motion simulation device is fixed on the frame, and applies a thrust to the track through the change of up and down displacement to simulate the rough road condition, so that the load wheel swings up and down around the spline center of the balance elbow, forming a relative motion with the frame; the load wheel drives the torsion bar spring to generate torsion through the balance elbow, and reduces the impact through the buffering effect of the torsion bar spring.

[0014] The track is installed around the driving wheel, load wheel and guide wheel. The driving wheel is driven to rotate by the transmission device, driving the track to move, and the track drives the load wheel and guide wheel to rotate under the action of friction.

[0015] Further, the transmission device is fixed on the frame through a fastener.

[0016] Further, the driving wheel bracket is fixed on the frame by a fastener or welding; the balance elbow bracket is fixed on the frame by a fastener or welding; the torsion bar bracket is fixed on the frame by a fastener or welding; the guide wheel bracket is fixed on the frame by a fastener or welding.

[0017] Further, the track adjuster is fixed on the frame through a fastener.

[0018] Further, the road surface motion simulation device is fixed on the frame through a fastener.

[0019] Further, the limiter bracket is fixed to the frame. When the load wheel during simulated movement is impacted and rises relative to the vehicle body and reaches the limit position, the balance elbow impacts the limiter bracket, and the limiter bracket absorbs the impact energy, and the torsion bar spring stops rotating.

[0020] Further, the limiter bracket is fixed to the frame by fasteners or welding.

[0021] (III) Beneficial effects

[0022] The utility model provides a balance elbow fatigue test device, which includes a transmission device, a driving wheel, a crawler belt, a load wheel, a guide wheel, a crawler belt adjuster, a road surface movement simulation device, a frame, a torsion bar spring, a balance elbow bracket, a torsion bar bracket, a guide wheel bracket and a driving wheel bracket. The utility model can simulate the force on the balance elbow during vehicle driving, and determine whether the balance elbow meets the technical requirements by testing its fatigue life. This test device enables the balance elbow to simulate the real environment road surface without being installed on the whole vehicle. Compared with the traditional test method, the utility model has obvious effects, short test period and low cost, and can effectively shorten the R & D cycle of new products and reduce costs. Description of the drawings

[0023] Figure 1 is the front view of the balance elbow fatigue test device of the utility model;

[0024] Figure 2 is the top view of the balance elbow fatigue test device of the utility model. Specific embodiments

[0025] To make the purpose, content and advantages of the utility model clearer, the following further describes the specific embodiments of the utility model in detail with reference to the drawings and embodiments.

[0026] This embodiment provides a balance elbow fatigue test device, the structure of which is as Figure 1 and 2 shown, mainly including a transmission device 1, a driving wheel 2, a crawler belt 3, a load wheel 4, a guide wheel 5, a crawler belt adjuster 6, a road surface movement simulation device 7, a frame 10, a torsion bar spring 12, a balance elbow bracket 8, a limiter bracket 9, a torsion bar bracket 11, a guide wheel bracket 14 and a driving wheel bracket 15.

[0027] The transmission device 1 is fixed to the frame 10 by fasteners, and is used to provide power for the fatigue test, and can meet the speed and torque requirements during simulated vehicle driving.

[0028] The driving wheel bracket 15 is fixed to the frame 10 by fasteners or welding, etc., and the output end of the transmission device 1 is connected to the driving wheel 2 through the driving wheel bracket 15.

[0029] The balance elbow bracket 8 is fixed to the frame 10 by means of fasteners or welding. One end of the balance elbow 13, which is used as a test piece, is fixedly connected to the balance elbow bracket 8 by fasteners, and the other end is fixedly connected to the load wheel 4 by fasteners.

[0030] The torsion bar bracket 11 is fixed to the frame 10 by means of fasteners or welding. One end of the torsion bar spring 12 is splined into the spline hole of the balance elbow 13 and fixed by fasteners, and the other end of the torsion bar spring 12 is splined into the spline hole of the torsion bar bracket 11 and fixed by fasteners.

[0031] The idler wheel bracket 14 is fixed to the frame 10 by means of fasteners or welding. The idler wheel 5 is connected to the idler wheel bracket 14 by fasteners.

[0032] The track adjuster 6 is fixed to the frame 10 by fasteners, and is used to apply a set value of pressure to the track 3, adjust its contact position with the track 3 according to the change of the tightness of the track 3, and maintain the applied set pressure.

[0033] The road surface motion simulation device 7 is fixed to the frame 10 by fasteners. The road surface motion simulation device 7 applies a thrust to the track 3 through the change of up and down displacement to simulate the rough road condition, so that the load wheel 4 swings up and down around the spline center of the balance elbow 13, forming a relative motion with the frame 10. At the same time, the load wheel 4 drives the torsion bar spring 12 to generate torsion through the balance elbow 13, and reduces the impact through the buffering effect of the torsion bar spring 12.

[0034] The limiter bracket 9 is fixed to the frame 10 by means of fasteners or welding. When the load wheel 4 in the simulated motion is impacted and rises relative to the vehicle body and reaches the limit position, the balance elbow 13 impacts the limiter bracket 9, and the limiter bracket 9 absorbs the impact energy, and the torsion bar spring 12 stops rotating.

[0035] The track 3 is installed around the driving wheel 2, the load wheel 4 and the idler wheel 5. The driving wheel 2 is driven to rotate by the transmission device 1, driving the track 3 to move. Under the action of friction, the track 3 drives the load wheel 4 and the idler wheel 5 to rotate.

[0036] The specific method for conducting the balance elbow fatigue test using the above test device is as follows:

[0037] S1. One end of the balance elbow 13, which is used as a test piece, is fixedly connected to the balance elbow bracket 8 by fasteners, and the other end is fixedly connected to the load wheel 4 by fasteners. One end of the torsion bar spring 12 is splined into the spline hole of the balance elbow 13 and fixed by fasteners, and the other end of the torsion bar spring 12 is splined into the spline hole of the torsion bar bracket 11 and fixed by fasteners;

[0038] S2. The track 3 is installed around the driving wheel 2, the load wheel 4 and the idler wheel 5;

[0039] S3. The crawler adjuster 6 is fixed on the frame 10 through fasteners, applies a set value of pressure to the crawler 3, adjusts its contact position with the crawler 3 according to the change in the tightness of the crawler 3, and maintains the application of the set pressure.

[0040] S4. The road surface motion simulation device 7 is fixed on the frame 10 through fasteners, and adjusts the top of the road surface motion simulation device 7 to be in contact with the crawler 3.

[0041] S5. The transmission device 1 drives the driving wheel 2 to rotate at the test-set speed, drives the crawler 3 to move, and under the action of friction, the crawler 3 drives the idler wheel 4 and the guide wheel 5 to rotate.

[0042] S6. The road surface motion simulation device 7 moves according to the set up-and-down displacement change when simulating the uneven road surface. When moving upward, a force is applied through the crawler 3 to push the idler wheel 4 to move upward relative to the frame 10. The idler wheel 4 drives the torsion bar spring 12 to generate torsion through the balance elbow 13, the crawler 3 becomes slack, and the crawler adjuster 6 adjusts its contact position with the crawler 3 and maintains the application of the set pressure. When moving downward, the torsion bar spring 12 wants to return to its original position and releases the absorbed energy. The torsion bar spring 12 drives the idler wheel 4 to move downward through the balance elbow 13, the crawler 3 becomes taut, and the crawler adjuster 6 adjusts its contact position with the crawler 3 and maintains the application of the set pressure.

[0043] When the simulated idler wheel 4 is impacted and rises relative to the vehicle body and reaches the limit position, the balance elbow 13 impacts the limiter bracket 9, and the limiter bracket 9 absorbs the impact energy. The torsion bar spring 12 stops rotating. After the impact on the idler wheel 4 ends, the torsion bar spring 12 drives the idler wheel 4 to move downward through the balance elbow 13.

[0044] S7. Repeat steps S1 to S6. The balance elbow 13 is continuously subjected to bending, torsion and impact forces, and through the test, determine whether its fatigue life meets the technical requirements.

[0045] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. A balanced elbow fatigue test device, characterized in that: The balance elbow fatigue test device comprises a transmission device, a driving wheel, a crawler track, a road wheel, a guide wheel, a crawler track adjuster, a road motion simulation device, a frame, a torsion bar spring, a balance elbow bracket, a torsion bar bracket, a guide wheel bracket and a driving wheel bracket; wherein, The transmission device is fixed on the frame and is used to provide power for fatigue testing, which can meet the speed and torque requirements of the simulated vehicle driving; The driving wheel bracket is fixed on the frame, and the output end of the transmission device is connected to the driving wheel through the driving wheel bracket; The balance elbow bracket is fixed on the frame, one end of the balance elbow as a test piece is fixedly connected to the balance elbow bracket through a fastener, and the other end is fixedly connected to the road wheel through a fastener; The torsion bar bracket is fixed on the frame, one end of the torsion bar spring is splined into the spline hole of the balance elbow and fixed by a fastener, and the other end of the torsion bar spring is splined into the spline hole of the torsion bar bracket and fixed by a fastener; The guide wheel bracket is fixed on the frame, and the guide wheel is connected to the guide wheel bracket through a fastener; The track adjuster is fixed on the frame and is used to apply a set pressure to the track, adjust the contact position between the track and the track according to the change of the tightness of the track, and keep applying the set pressure; The road motion simulation device is fixed on the frame, and applies thrust to the track through the up and down displacement changes to simulate the rough road conditions, so that the road wheel swings up and down around the center of the spline circle of the balance elbow, forming a relative motion with the frame; the road wheel drives the torsion bar spring to twist through the balance elbow, and the impact is reduced by the buffering effect of the torsion bar spring; The crawler track is installed around the driving wheel, the road wheel and the guide wheel. The driving wheel is driven to rotate through the transmission device, which drives the crawler track to move. Under the action of friction, the crawler track drives the road wheel and the guide wheel to rotate.

2. The balanced elbow fatigue test device according to claim 1, characterized in that: The transmission device is fixed to the frame by fasteners.

3. The balanced elbow fatigue test device according to claim 1, characterized in that: The driving wheel bracket is fixed to the frame by fasteners or welding; the balancing elbow bracket is fixed to the frame by fasteners or welding; the torsion bar bracket is fixed to the frame by fasteners or welding; and the guide wheel bracket is fixed to the frame by fasteners or welding.

4. The balanced elbow fatigue test device according to claim 1, characterized in that: The track adjuster is fixed to the frame by fasteners.

5. The balanced elbow fatigue test device according to claim 1, characterized in that: The road motion simulation device is fixed to the frame by fasteners.

6. The balanced elbow fatigue test device according to claim 1, characterized in that: The limiter bracket is fixed on the frame. When the road wheel in simulated motion is impacted and rises relative to the vehicle body and reaches the limit position, the balance elbow hits the limiter bracket, the limiter bracket absorbs the impact energy, and the torsion bar spring stops rotating.

7. The balanced elbow fatigue test device according to claim 6, characterized in that: The limiter bracket is fixed to the frame by fasteners or welding.

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