Multi-shaft fretting wear testing device for hub bearing

Abstract

The invention discloses a multi-shaft fretting wear testing device for a hub bearing, which comprises an equipment rack, a hydraulic oil source system assembly, a temperature simulation environment box, a tool structure component and an auxiliary hoisting mechanism, and is characterized in that the temperature simulation environment box is mounted on the equipment rack, the tool structure component is used for mounting the hub bearing to be tested, and the auxiliary hoisting mechanism is mounted on the equipment rack; the tool structure component is installed in the temperature simulation environment box, the auxiliary hoisting mechanism is arranged above the temperature simulation environment box, and a radial load actuator, an axial load actuator and a swing actuator are arranged in the equipment rack. According to the multi-axis fretting wear testing device for the hub bearing, simulation of the environment temperature and application of loads in multiple directions can be effectively achieved, so that testing is achieved by applying swing actions.

Description

Technical Field

[0001] The invention relates to a fretting wear testing device, and more particularly to a multi-axis fretting wear testing device for a hub bearing. Background Art

[0002] Fretting wear refers to a composite type of wear caused by small amplitude vibration between metal surfaces that are pressed against each other. In the prior art, the load force generated by road bumps during the batch transportation of whole vehicles. When this load force is transmitted to the wheel hub bearing, fretting wear will occur between the inner flange, rolling elements and outer flange. Therefore, fretting wear needs to be considered during the production of bearings, and the impact of fretting wear on the service life of bearings needs to be studied. However, there is currently no suitable equipment to implement the above research. Summary of the invention

[0003] In view of the deficiencies in the prior art, an object of the present invention is to provide a multi-axis fretting wear testing device for a hub bearing that can effectively study the influence of fretting wear on the service life of the bearing.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multi-axis micro-motion wear test device for a wheel hub bearing, characterized in that it includes an equipment frame, a hydraulic oil source system assembly, a temperature simulation environment box, a tooling structure component and an auxiliary lifting mechanism, wherein the temperature simulation environment box is installed on the equipment frame, the tooling structure component is used to install the wheel hub bearing to be tested, and the tooling structure component is installed in the temperature simulation environment box to realize the micro-motion wear operation of the wheel hub bearing, the auxiliary lifting mechanism is arranged above the temperature simulation environment box, and is used to lift the wheel hub bearing to be tested and install it into the tooling structure component, the equipment frame is provided with a radial load actuator, an axial load actuator and a swing actuator to provide radial load, axial load and swing motion to the wheel hub bearing to be tested installed in the tooling structure component, and the hydraulic oil source system assembly is connected to the radial load actuator, the axial load actuator and the swing actuator to provide hydraulic power to the radial load actuator, the axial load actuator and the swing actuator.

[0005] As a further improvement of the present invention, the temperature simulation environment box includes a box base and a box cover, the box base is an L-shaped plate structure, and the box cover is a hollow rectangular structure. One side of the box cover is hinged to the side of the box base so that the box cover can be installed on the box base by flipping left or right. The lower side of the box cover and the side facing the box base are open so that they can be combined with the box base to form a space after the box cover is flipped to the right. The tooling structure component is fixedly installed on the box base, and two vertically distributed air vents are provided on the box base. The two air vents are connected to the high and low temperature unit through pipes, so that the temperature inside the space is controlled by continuously outputting high and low temperature gases to the space inside the box cover through the high and low temperature unit.

[0006] As a further improvement of the present invention, the tooling structure components include a fixed plate, a base plate, a connecting plate, a test shaft and a loading block. The fixed plate is fixedly mounted on the box seat, the base plate is coaxially fixedly mounted at the center position of the fixed plate on the side facing away from the box seat, the connecting plate is coaxially fixed on one end of the base plate facing away from the fixed plate, the test shaft is coaxially fixed on one end of the connecting plate facing away from the base plate, the bearing to be tested is coaxially sleeved on the test shaft, the loading block is fixed on the outer ring of the bearing to be tested, and is linked with the radial load actuator, the axial load actuator and the swing actuator to provide radial load, axial load and swing motion to the bearing to be tested.

[0007] As a further improvement of the present invention, the loading block is an L-shaped rod structure, the vertical rod of the L-shaped rod structure is fixed on the outer ring of the bearing to be tested, and the loading rod is fixed on the lower side of the horizontal rod. The radial load actuator, axial load actuator and swing actuator are all hydraulic push rods, and the push rod end of the axial load actuator is hingedly installed on the side of the loading rod, the lower end of the loading rod is linked with the end of the push rod of the radial load actuator, and the push rod end of the swing actuator is hinged on the side of the loading rod and is below the push rod end of the axial load actuator.

[0008] As a further improvement of the present invention, a right-angle plate is hingedly installed at a lower position of the equipment frame relative to the box seat, the right angle of the right-angle plate is hinged to the equipment frame, the lower end of the loading rod penetrates downward through the box seat and is hingedly installed on one of the acute angles of the right-angle plate, and the end of the push rod of the radial load actuator is hinged on the other acute angle of the right-angle plate, so that the push rod of the radial load actuator and the loading rod are linked through the right-angle plate.

[0009] As a further improvement of the present invention, a spring with a protruding middle part and contracted at both ends is coaxially sleeved on the loading rod at a position above the acute angle of the right-angle plate and below the end of the push rod of the swing actuator, and the middle part of the spring is fixedly mounted on the equipment frame.

[0010] As a further improvement of the present invention, an angle encoder is fixed on the side of the vertical rod of the loading block facing away from the outer ring of the bearing to be tested, and a detection rod is fixed to the rotating shaft of the angle encoder. A U-shaped groove is provided at one end of the detection rod facing away from the rotating shaft of the angle encoder, and an insertion rod is eccentrically fixed on the end face of the connecting disk facing away from the base disk. The insertion rod passes through the loading block and is inserted into the U-shaped groove to limit the rotation angle of the detection rod.

[0011] As a further improvement of the present invention, a scale is fixed on the side of the fixing plate, and a plurality of long grooves for installing the base plate are formed on the fixing plate.

[0012] The beneficial effects of the present invention are as follows: through the arrangement of an equipment frame, a hydraulic oil source system assembly, a temperature simulation environment chamber, tooling structural components and an auxiliary lifting mechanism, a device for testing a hub motor can be effectively formed; and through the arrangement of a radial load actuator, an axial load actuator and a swing actuator in the equipment frame, radial load application, axial load application and swing action application can be realized for the hub bearing to be tested, thereby effectively realizing multi-axis micro-motion wear testing of the hub bearing under multiple ambient temperatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is an overall structural diagram of the multi-axis fretting wear testing device for the hub bearing of the present invention; Figure 2 for Figure 1 The overall structure diagram of the medium temperature simulation environment chamber; Figure 3 It is the overall structural diagram of the tooling structural components; Figure 4 It is the overall structural diagram of the combination of radial load actuator, axial load actuator and swing actuator. DETAILED DESCRIPTION

[0014] The present invention will be further described below in conjunction with the embodiments given in the accompanying drawings.

[0015] Reference Figures 1 to 4As shown, a multi-axis micro-motion wear test device for a wheel hub bearing of the present embodiment comprises an equipment frame 1, a hydraulic oil source system assembly 2, a temperature simulation environment box 3, a tooling structure component 4 and an auxiliary lifting mechanism 5, wherein the temperature simulation environment box 3 is installed on the equipment frame 1, and the tooling structure component 4 is used to install the wheel hub bearing to be tested, and the tooling structure component 4 is installed in the temperature simulation environment box 3 to realize the micro-motion wear operation for the wheel hub bearing, and the auxiliary lifting mechanism 5 is arranged above the temperature simulation environment box 3, and is used to lift the wheel hub bearing to be tested and install it into the tooling structure component 4, and the equipment frame 1 is provided with a radial load actuator 6, an axial load actuator 7 and a swing actuator 8 to provide radial load, axial load and swing motion to the wheel hub bearing to be tested installed in the tooling structure component 4, and the hydraulic oil source system assembly 2 and the radial load actuator 6, The axial load actuator 7 and the swing actuator 8 are connected to provide hydraulic power to the radial load actuator 6, the axial load actuator 7 and the swing actuator 8. In the process of testing the wheel hub bearing using the test device of this embodiment, it is only necessary to install the wheel hub bearing to be tested into the tooling structure component 4, and the simulation of the ambient temperature can be realized through the temperature simulation environment box 3, and then the radial load actuator 6 in the equipment frame 1 applies the radial load, the axial load actuator 7 applies the axial load and the swing actuator 8 applies the swing. In this way, the simulation of the multi-axis micro-motion wear condition of the wheel hub bearing is well realized, and then the test of the multi-axis micro-motion wear of the wheel hub bearing is realized simply and effectively. In addition, an electrical cabinet is also provided in this embodiment, and electrical components and an upper industrial computer are installed in the electrical control cabinet to control, detect and record various moving parts and detection parts.

[0016] As a specific embodiment of the improvement, the temperature simulation environment box 3 includes a box seat 31 and a box cover 32, the box seat 31 is an L-shaped plate structure, the box cover 32 is a hollow rectangular parallelepiped structure, one side of the box cover 32 is hinged to the side of the box seat 31, so that the box cover 32 can be installed on the box seat 31 by flipping left and right, the lower side of the box cover 32 and the side facing the box seat 31 are open, so that after the box cover 32 is flipped to the right, it is combined with the box seat 31 to form a space, the tooling structure component 4 is fixedly installed on the box seat 31, and the box seat 31 Two vertically distributed air holes 321 are provided on the top, and the two air holes 321 are connected to the high and low temperature unit through pipes, so as to control the temperature inside the space by continuously outputting high and low temperature gases to the space inside the box cover 32 through the high and low temperature unit. Through the arrangement of the above structure, the temperature in the space can be controlled by using the high and low temperature unit to blow hot air or cold air into the space inside the box cover 32 and the box seat 31 through pipes. Compared with the method of directly setting a heating wire in the box seat 31 or the box cover 32, the temperature in the space will be more stable and reliable.

[0017] As a specific implementation of the improvement, the tooling structure component 4 includes a fixed plate 41, a base plate 45, a connecting plate 43, a test shaft 44 and a loading block 42. The fixed plate 41 is fixedly installed on the box seat 31, and the base plate 45 is coaxially fixedly installed at the center position of the fixed plate 41 on the side facing away from the box seat 31. The connecting plate 43 is coaxially fixed on one end of the base plate 45 facing away from the fixed plate 41. The test shaft 44 is coaxially fixed on one end of the connecting plate 43 facing away from the base plate 45. The bearing to be tested is coaxially sleeved on the test shaft 44. The loading block 42 is fixed on the outer ring of the bearing to be tested, and is linked with the radial load actuator 6, the axial load actuator 7 and the swing actuator 8 to provide radial load, axial load and swing motion to the bearing to be tested. Through the setting of the above structure, it can be provided to the mounting component of the wheel hub bearing to be tested through the test shaft 44, and then through the action of the loading block 42, the radial load, axial load and swing motion are transmitted to the wheel hub bearing to be tested, thereby realizing the test of the wheel hub bearing.

[0018] As a specific implementation of the improvement, the tooling structure component 4 includes a fixed plate 41, a base plate 45, a connecting plate 43, a test shaft 44 and a loading block 42. The fixed plate 41 is fixedly installed on the box seat 31, and the base plate 45 is coaxially fixedly installed at the center position of the fixed plate 41 on the side facing away from the box seat 31. The connecting plate 43 is coaxially fixed on one end of the base plate 45 facing away from the fixed plate 41. The test shaft 44 is coaxially fixed on one end of the connecting plate 43 facing away from the base plate 45. The bearing to be tested is coaxially sleeved on the test shaft 44. The loading block 42 is fixed on the outer ring of the bearing to be tested, and is linked with the radial load actuator 6, the axial load actuator 7 and the swing actuator 8 to provide radial load, axial load and swing action to the bearing to be tested. In this way, through the arrangement of the above structure, the load application to the wheel hub bearing to be tested can be simply and effectively realized.

[0019] As an improved specific implementation method, the loading block 42 is in an L-shaped rod structure, the vertical rod of the L-shaped rod structure is fixed on the outer ring of the bearing to be tested, and the loading rod 421 is fixed on the lower side of the horizontal rod. The radial load actuator 6, the axial load actuator 7 and the swing actuator 8 are all hydraulic push rods, and the push rod end of the axial load actuator 7 is hingedly installed on the side of the loading rod 421. The lower end of the loading rod 421 is linked to the end of the push rod of the radial load actuator 6, and the push rod end of the swing actuator 8 is hinged on the side of the loading rod 421 and is below the push rod end of the axial load actuator 7. Through the arrangement of the above structure, it can be achieved that the loading block 42 can transfer the load to the wheel hub bearing under the premise that more space is provided to connect with the radial load actuator 6, the axial load actuator 7 and the swing actuator 8.

[0020] As a specific implementation of the improvement, a right-angle plate 11 is hingedly installed at a position below the equipment frame 1 relative to the box seat 31, and the right angle of the right-angle plate 11 is hinged to the equipment frame 1. The lower end of the loading rod 421 penetrates downwardly through the box seat 31 and is hingedly installed on one of the acute angles of the right-angle plate 11. The end of the push rod of the radial load actuator 6 is hinged on the other acute angle of the right-angle plate 11, so that the push rod of the radial load actuator 6 and the loading rod 421 are linked through the right-angle plate 11. Through the arrangement of the above structure, the application of the radial load can be achieved mainly through the right-angle plate 11. In this way, the output direction of the radial load actuator 6 does not need to be the same as the direction of the loading rod 421, which greatly reduces the vertical space requirement and thereby reduces the height of the overall equipment.

[0021] As a specific implementation of the improvement, the loading rod 421 is coaxially sleeved with a spring 422 with a protruding middle part and contracted at both ends at a position above the acute angle of the right-angle plate 11 and below the end of the push rod of the swing actuator 8. The middle part of the spring 422 is fixedly mounted on the equipment frame 1. Through the setting of the spring 422, a buffering effect can be effectively provided during the load application process to ensure the stability of the load application process.

[0022] As an improved specific implementation, an angle encoder 423 is fixed on the side of the vertical rod of the loading block 42 facing away from the outer ring of the bearing to be tested, and a detection rod 424 is fixed to the rotating shaft of the angle encoder 423. A U-shaped groove is provided on the end of the detection rod 424 facing away from the rotating shaft of the angle encoder 423, and an insertion rod 431 is eccentrically fixed on the end face of the connecting plate 43 facing away from the base plate 45. The insertion rod 431 passes through the loading block 42 and is inserted into the U-shaped groove to limit the rotation angle of the detection rod 424. Through the arrangement of the above-mentioned structure, the detection rod 424 and the insertion rod 431 can be simply and effectively used to cooperate to realize the detection of the angle.

[0023] As an improved specific implementation, a scale is fixed on the side of the fixed plate 41, and a plurality of long grooves for installing the base plate 45 are opened on the fixed plate 41. By setting the scale, it is possible to simply and effectively provide the base plate 45 with an adjustment space for the upper and lower positions, thereby making it better suitable for testing wheel hub bearings with different diameters.

[0024] In summary, the multi-axis fretting wear testing device for the wheel hub bearing of the present embodiment, by means of the equipment frame 1, the hydraulic oil source system assembly 2, the temperature simulation environment chamber 3, the tooling structure components 4 and the auxiliary lifting mechanism 5, can simply and effectively constitute a device for performing multi-axis fretting wear testing on the wheel hub bearing, thereby being able to effectively study the influence of the fretting wear phenomenon on the service life of the bearing.

[0025] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A multi-axis fretting wear test device for a hub bearing, characterized in that: The invention comprises an equipment frame (1), a hydraulic oil source system assembly (2), a temperature simulation environment box (3), a tooling structure component (4) and an auxiliary lifting mechanism (5), wherein the temperature simulation environment box (3) is installed on the equipment frame (1), the tooling structure component (4) is used to install a wheel hub bearing to be tested, and the tooling structure component (4) is installed in the temperature simulation environment box (3) to realize a micro-motion wear operation on the wheel hub bearing, and the auxiliary lifting mechanism (5) is arranged above the temperature simulation environment box (3) and is used to lift the wheel hub shaft to be tested. The device is installed in a tooling structure component (4), wherein a radial load actuator (6), an axial load actuator (7) and a swing actuator (8) are arranged in the equipment frame (1) to provide radial load, axial load and swing motion to the wheel hub bearing to be tested installed in the tooling structure component (4), and the hydraulic oil source system assembly (2) is connected to the radial load actuator (6), the axial load actuator (7) and the swing actuator (8) to provide hydraulic power to the radial load actuator (6), the axial load actuator (7) and the swing actuator (8).

2. The multi-axis fretting wear testing device for wheel hub bearings according to claim 1, characterized in that: The temperature simulation environment box (3) comprises a box seat (31) and a box cover (32); the box seat (31) is an L-shaped plate structure; the box cover (32) is a hollow rectangular parallelepiped structure; one side of the box cover (32) is hinged to the side of the box seat (31) so that the box cover (32) can be installed on the box seat (31) by flipping left and right; the lower side of the box cover (32) and the side facing the box seat (31) are open so that after the box cover (32) is flipped rightward, it is combined with the box seat (31) to form a space; the tooling structure component (4) is fixedly mounted on the box seat (31); two vertically distributed vents (321) are provided on the box seat (31); the two vents (321) are connected to a high and low temperature unit through a pipeline so that the temperature inside the space is controlled by continuously outputting high and low temperature gases to the space inside the box cover (32) through the high and low temperature unit.

3. The multi-axis fretting wear testing device for wheel hub bearings according to claim 2, characterized in that: The tooling structural component (4) comprises a fixed plate (41), a base plate (45), a connecting plate (43), a test shaft (44) and a loading block (42); the fixed plate (41) is fixedly mounted on the box seat (31); the base plate (45) is coaxially fixedly mounted at a central position of the fixed plate (41) on a side facing away from the box seat (31); the connecting plate (43) is coaxially fixed on an end of the base plate (45) facing away from the fixed plate (41); the test shaft (44) is coaxially fixed on an end of the connecting plate (43) facing away from the base plate (45); the bearing to be tested is coaxially sleeved on the test shaft (44); the loading block (42) is fixed on the outer ring of the bearing to be tested and is linked with a radial load actuator (6), an axial load actuator (7) and a swing actuator (8) to provide radial load, axial load and swing motion to the bearing to be tested.

4. The multi-axis fretting wear testing device for wheel hub bearings according to claim 3, characterized in that: The loading block (42) is an L-shaped rod structure, the vertical rod of the L-shaped rod structure is fixed on the outer ring of the bearing to be tested, and the loading rod (421) is fixed on the lower side of the horizontal rod. The radial load actuator (6), the axial load actuator (7) and the swing actuator (8) are all hydraulic push rods. The end of the push rod of the axial load actuator (7) is hingedly mounted on the side of the loading rod (421), and the lower end of the loading rod (421) is linked to the end of the push rod of the radial load actuator (6). The end of the push rod of the swing actuator (8) is hingedly mounted on the side of the loading rod (421) and is located below the end of the push rod of the axial load actuator (7).

5. The multi-axis fretting wear testing device for wheel hub bearings according to claim 4, characterized in that: A right-angle plate (11) is hingedly mounted on the equipment frame (1) at a position below the box seat (31); the right angle of the right-angle plate (11) is hingedly mounted on the equipment frame (1); the lower end of the loading rod (421) penetrates downward through the box seat (31) and is hingedly mounted on one of the acute angles of the right-angle plate (11); the end of the push rod of the radial load actuator (6) is hingedly mounted on the other acute angle of the right-angle plate (11), so that the push rod of the radial load actuator (6) and the loading rod (421) are linked via the right-angle plate (11).

6. The multi-axis fretting wear testing device for wheel hub bearings according to claim 5, characterized in that: A spring (422) with a protruding middle portion and contracted at both ends is coaxially sleeved on the loading rod (421) at a position above the acute angle of the right-angle plate (11) and below the end of the push rod of the swing actuator (8), and the middle portion of the spring (422) is fixedly mounted on the equipment frame (1).

7. The multi-axis fretting wear testing device for wheel hub bearings according to claim 6, characterized in that: An angle encoder (423) is fixed to the side of the vertical rod of the loading block (42) facing away from the outer ring of the bearing to be tested, and a detection rod (424) is fixed to the rotating shaft of the angle encoder (423). A U-shaped groove is formed at one end of the detection rod (424) facing away from the rotating shaft of the angle encoder (423). An insertion rod (431) is eccentrically fixed to the end surface of one end of the connecting disk (43) facing away from the base disk (45). The insertion rod (431) passes through the loading block (42) and is inserted into the U-shaped groove to limit the rotation angle of the detection rod (424).

8. The multi-axis fretting wear testing device for wheel hub bearings according to claim 7, characterized in that: A scale is fixed on the side of the fixing plate (41), and a plurality of long grooves for mounting the base plate (45) are provided on the fixing plate (41).

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