A four-wheel synchronous walking test machine

Abstract

The present invention relates to a four-wheel synchronous walking test machine for synchronously testing the durability and wear resistance of four casters under different loads, including a test bench, a wheel frame for mounting the four casters, a driving device for driving the four casters to rotate synchronously, and a load device for uniformly applying force to the four casters. The wheel frame can move up and down relative to the test bench. Four wheel axles for fixing the four casters respectively are arranged on the wheel frame. The four wheel axles are in the same plane, and the plane where the four wheel axles are located is parallel to the plane where the test bench is located. The present invention provides a four-wheel synchronous walking test machine, which can synchronously test the durability and wear resistance of four casters and can greatly improve the test efficiency.

Description

Technical Field

[0001] The present invention relates to the field of testing, and particularly to a four-wheel synchronous walking test machine. Background Art

[0002] The walking test machine can test casters, and can measure the durability and wear resistance of casters under different loads to ensure that the product performance meets the production requirements. However, the existing walking test machine can only test one caster at a time, with low efficiency, and urgent improvement is needed. Summary of the Invention

[0003] In view of this, the present invention provides a four-wheel synchronous walking test machine, which can synchronously test the durability and wear resistance of four casters, and can greatly improve the test efficiency.

[0004] The object of the present invention is achieved by the following technical solutions:

[0005] A four-wheel synchronous walking test machine for synchronously testing the durability and wear resistance of four casters under different loads, including a test bench, a wheel frame for mounting four casters, a driving device for driving the four casters to rotate synchronously, and a load-bearing device for uniformly applying force to the four casters. The wheel frame can move up and down relative to the test bench. Four wheel axles for respectively fixing the four casters are arranged on the wheel frame. The four wheel axles are in the same plane, and the plane where the four wheel axles are located is parallel to the plane where the test bench is located.

[0006] Preferably, the four wheel axles are respectively a first wheel axle, a second wheel axle perpendicular to the straight line where the first wheel axle is located, a third wheel axle perpendicular to the straight line where the second wheel axle is located, and a fourth wheel axle perpendicular to the straight line where the third wheel axle is located.

[0007] Preferably, the straight line where the first wheel axle is located coincides with the straight line where the third wheel axle is located, and the straight line where the second wheel axle is located coincides with the straight line where the fourth wheel axle is located

[0008] Preferably, the driving device includes a servo motor, a positioning bearing, a transmission spline shaft, and a driving gear.

[0009] Preferably, the wheel frame moves up and down relative to the test bench through the transmission spline shaft.

[0010] Preferably, all four wheel axles are meshed and driven with the driving gear. When the driving gear rotates, the plane where the rotation trajectory of any point on the driving gear is located is parallel to the plane where the test bench is located.

[0011] Preferably, the wheel frame further includes a frame body for mounting the four wheel axles, and the four wheel axles can rotate relative to the frame body.

[0012] Preferably, the load-bearing device includes a pressing block in contact connection with the frame body, a force-applying lever in universal connection with the pressing block, and a weight suspended at one end of the force-applying lever.

[0013] Preferably, a spherical groove is provided on the briquette, and a universal ball head is provided on the force-applying lever. The universal ball head is embedded in the spherical groove and rotatably connected to the spherical groove. The spherical groove coincides with the center of gravity of the briquette or the connecting line is perpendicular to the plane where the test bench is located.

[0014] Preferably, it further includes a frame, and the test bench and the servo motor are fixedly arranged on the frame.

[0015] The beneficial effects of the present invention compared with the prior art are as follows:

[0016] The four-wheel synchronous walking test machine of the present invention can synchronously test the durability and wear resistance of four casters, and can greatly improve the test efficiency. Since a transmission spline shaft is also provided between the wheel frame and the servo motor, the wheel frame can move up and down to a certain extent relative to the test bench. Therefore, the four axles will synchronously descend a certain distance under load, so that the casters are subjected to a certain weight load. The servo motor is started to drive the wheel frame to rotate. The casters contact the test bench surface and roll along the test bench. The casters make a circular motion with the center of the wheel frame as the center of the circle, so as to test the durability and wear resistance of the casters. Description of the Drawings

[0017] Figure 1 It is a structural diagram of the four-wheel synchronous walking test machine in an embodiment of the present invention. Detailed Embodiment

[0018] For the convenience of those skilled in the art to understand, the present invention will be further described in detail below in conjunction with specific embodiments and the accompanying drawings.

[0019] Please refer to Figure 1 , the embodiments of the present invention include:

[0020] A four-wheel synchronous walking test machine for synchronously testing the durability and wear resistance of four casters under different loads, including a test bench 1, a wheel frame 2 for mounting four casters, a driving device for driving the four casters to rotate synchronously, a load-bearing device for uniformly applying force to the four casters, and a frame 14. The wheel frame 2 can move up and down relative to the test bench 1. Four wheel axles for respectively fixing the four casters are provided on the wheel frame 2. The four wheel axles are in the same plane, and the plane where the four wheel axles are located is parallel to the plane where the test bench 1 is located.

[0021] The four wheel axles are respectively a first wheel axle 3, a second wheel axle perpendicular to the straight line where the first wheel axle 3 is located, a third wheel axle 4 perpendicular to the straight line where the second wheel axle is located, and a fourth wheel axle perpendicular to the straight line where the third wheel axle 4 is located. The straight line where the first wheel axle 3 is located coincides with the straight line where the third wheel axle 4 is located, and the straight line where the second wheel axle is located coincides with the straight line where the fourth wheel axle is located. The driving device includes a servo motor 5, a positioning bearing 6, a transmission spline shaft 7, and a driving gear 8.

[0022] The wheel carrier 2 moves up and down relative to the test bench 1 through the transmission spline shaft 7. All four wheel axles are in meshing transmission with the driving gear 8. When the driving gear 8 rotates, the plane where the rotation locus of any point on the driving gear 8 is located is parallel to the plane where the test bench 1 is located. The wheel carrier 2 further includes a frame body 9 for mounting the four wheel axles, and the four wheel axles can rotate relative to the frame body 9.

[0023] The load-bearing device includes a pressing block 10 in contact connection with the frame body 9, a force-applying lever 11 in universal connection with the pressing block 10, and a weight 12 suspended at one end of the force-applying lever 11. A spherical groove is provided on the pressing block 10, and a universal ball head 13 is provided on the force-applying lever 11. The universal ball head 13 is embedded in the spherical groove and rotatably connected to the spherical groove. The spherical groove coincides with the center of gravity of the pressing block 10 or the connection line is perpendicular to the plane where the test bench 1 is located. The test bench 1 and the servo motor 5 are fixedly arranged on the machine frame 14.

[0024] The working principle is as follows. A caster is sleeved on the end of each of the four wheel axles. At this time, the four casters are arranged in a uniform circular distribution. By adjusting the weight, the downward pressure of the force-applying lever on the pressing block is changed. Since the force-applying lever and the pressing block are connected by a universal ball head, when there is an angle between the force-applying lever and the horizontal plane, the downward pressure applied by the force-applying lever on the pressing block can still be kept perpendicular to the test bench downward. The pressing block under the action of the downward pressure applies a downward force perpendicular to the test bench to the frame body. The force received by the frame body is evenly distributed on the four axles. Since there is also a transmission spline shaft between the wheel carrier and the servo motor, the wheel carrier can move up and down to a certain extent relative to the test bench. Therefore, at this time, the four axles will synchronously descend a certain distance, and the casters receive a certain weight of load. The servo motor is started to drive the wheel carrier to rotate. The casters contact the test bench surface and roll along the test bench. The casters make a circular motion with the center of the wheel carrier as the center of the circle, thereby testing the durability and wear resistance of the casters.

[0025] Although the description of the present invention is made in combination with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and changes according to the above content. Therefore, all such substitutions, improvements and changes are included in the spirit and scope of the appended claims.

Claims

1. A four-wheel synchronous walking test machine, characterized in that, Used for synchronously testing the durability and wear resistance of four casters under different loads, including a test bench (1), a caster frame (2) for mounting four casters, a driving device for driving the four casters to rotate synchronously, and a loading device for applying uniform force to the four casters. The caster frame (2) can move up and down relative to the test bench (1). Four wheel axles for respectively fixing the four casters are arranged on the caster frame (2). The four wheel axles are in the same plane, and the plane where the four wheel axles are located is parallel to the plane where the test bench (1) is located. The driving device includes a servo motor (5), a positioning bearing (6), a transmission spline shaft (7), and a driving gear (8). The caster frame (2) moves up and down relative to the test bench (1) through the transmission spline shaft (7). All four wheel axles are meshed and driven with the driving gear (8). When the driving gear (8) rotates, the plane where the rotation trajectory of any point on the driving gear (8) is located is parallel to the plane where the test bench (1) is located. The loading device includes a pressing block (10) in contact connection with a frame body (9), a force-applying lever (11) in universal connection with the pressing block (10), and a weight (12) suspended at one end of the force-applying lever (11).

2. The four-wheel synchronous walking test machine according to claim 1, characterized in that, The four wheel axles are respectively a first wheel axle (3), a second wheel axle perpendicular to the straight line where the first wheel axle (3) is located, a third wheel axle (4) perpendicular to the straight line where the second wheel axle is located, and a fourth wheel axle perpendicular to the straight line where the third wheel axle (4) is located.

3. The four-wheel synchronous walking test machine according to claim 2, characterized in that, The straight line where the first wheel axle (3) is located coincides with the straight line where the third wheel axle (4) is located, and the straight line where the second wheel axle is located coincides with the straight line where the fourth wheel axle is located.

4. The four-wheel synchronous walking test machine according to claim 1, characterized in that, The caster frame (2) further includes a frame body (9) for mounting the four wheel axles, and the four wheel axles can rotate relative to the frame body (9).

5. The four-wheel synchronous walking test machine according to claim 1, characterized in that, A spherical groove is arranged on the pressing block (10), and a universal ball head (13) is arranged on the force-applying lever (11). The universal ball head (13) is embedded in the spherical groove and is rotatably connected with the spherical groove. The spherical groove coincides with the center of gravity of the pressing block (10) or the connection line is perpendicular to the plane where the test bench (1) is located.

6. The four-wheel synchronous walking test machine according to claim 1, characterized in that, It further includes a machine frame (14), and the test bench (1) and the servo motor (5) are fixedly arranged on the machine frame (14).

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