Multi-axis fretting wear testing device for wheel hub bearings

Abstract

The present invention discloses a multi-axis fretting wear testing device for a hub bearing, comprising an equipment frame, a hydraulic oil source system assembly, a temperature simulation environment chamber, a tooling structure component, and an auxiliary lifting mechanism. The temperature simulation environment chamber is mounted on the equipment frame, the tooling structure component is used to mount the hub bearing to be tested, the tooling structure component is mounted in the temperature simulation environment chamber, the auxiliary lifting mechanism is arranged above the temperature simulation environment chamber, and a radial load actuator, an axial load actuator, and a swing actuator are arranged in the equipment frame. The multi-axis fretting wear testing device for a hub bearing of the present invention can effectively simulate the ambient temperature and apply loads in multiple directions by swinging motion to achieve testing.

Description

Technical Field

[0001] The present 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 is a complex type of wear caused by small-amplitude vibrations between pressed metal surfaces. Currently, the load forces generated by road bumps during batch transportation of complete vehicles are transmitted to the wheel hub bearing, causing fretting wear between the inner flange, rolling elements, and outer flange. Therefore, fretting wear must be considered during bearing production and its impact on bearing service life must be studied. However, currently, suitable equipment is not available to enable such research. Summary of the Invention

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

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a multi-axis micro-motion wear testing device for a wheel hub bearing, characterized in that it includes an equipment frame, a hydraulic oil source system assembly, a temperature simulation environment chamber, a tooling structure component and an auxiliary lifting mechanism, wherein the temperature simulation environment chamber 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 chamber to realize the micro-motion wear operation of the wheel hub bearing, the auxiliary lifting mechanism is arranged above the temperature simulation environment chamber, 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 swinging actuator to provide radial load, axial load and swinging 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 swinging actuator to provide hydraulic power to the radial load actuator, the axial load actuator and the swinging 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 and 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 units through pipes, so that the temperature inside the space can be controlled by continuously outputting high and low temperature gases to the space inside the box cover through the high and low temperature units.

[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 to 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 position below 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 and the loading rod of the radial load actuator are linked through the right-angle plate.

[0009] As a further improvement of the present invention, the loading rod is coaxially sleeved with a spring with a protruding middle and contracted at both ends at a position above the acute angle of the right-angle plate and below the end of the push rod of the swinging 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, a detection rod is fixed on the rotating shaft of the angle encoder, a U-shaped groove is provided on the 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, and 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 opened on the fixing plate.

[0012] The beneficial effects of the present invention are as follows: by arranging 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 constituted; and by arranging a radial load actuator, an axial load actuator and a swing actuator in the equipment frame, radial load application, axial load application and swing motion 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 This is an overall structural diagram of the multi-axis fretting wear testing device for a hub bearing according to the present invention;

[0014] Figure 2 for Figure 1 The overall structure diagram of the medium temperature simulation environment chamber;

[0015] Figure 3 It is the overall structural diagram of the tooling structural components;

[0016] Figure 4 This is the overall structural diagram of the combination of radial load actuator, axial load actuator and swing actuator. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0018] Reference Figures 1 to 4As shown, a multi-axis micro-motion wear testing device for a hub bearing of the present embodiment includes 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. The temperature simulation environment box 3 is installed on the equipment frame 1, and the tooling structure component 4 is used to install the hub bearing to be tested. The tooling structure component 4 is installed in the temperature simulation environment box 3 to realize the micro-motion wear operation of the hub bearing. The auxiliary lifting mechanism 5 is arranged above the temperature simulation environment box 3 and is used to lift the hub bearing to be tested and install it into the tooling structure component 4. A radial load actuator 6, an axial load actuator 7 and a swing actuator 8 are provided in the equipment frame 1 to provide radial load, axial load and swing motion to the hub bearing to be tested installed in the tooling structure component 4. 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. When using the test device of this embodiment to test the wheel hub bearing, it is only necessary to install the wheel hub bearing to be tested into the tooling structure component 4, and the ambient temperature can be simulated through the temperature simulation environment box 3. Then, the radial load is applied by the radial load actuator 6 in the equipment frame 1, 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-wear working condition of the wheel hub bearing is well realized, and the test of the multi-axis micro-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.

[0019] 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 There are two vertically distributed air vents 321 on the top, and the two air vents 321 are connected to the high and low temperature units 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 units. Through the arrangement of the above structure, the temperature in the space can be controlled by using the high and low temperature units 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.

[0020] As a specific embodiment 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 mounted on the box seat 31, and the base plate 45 is coaxially fixedly mounted 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 arrangement of the above structure, the radial load, axial load and swing motion can be provided to the mounting component of the wheel hub bearing to be tested through the test shaft 44, and then the radial load, axial load and swing motion are transmitted to the wheel hub bearing to be tested through the action of the loading block 42, thereby realizing the test of the wheel hub bearing.

[0021] As a specific embodiment 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 swinging actuator 8 to provide radial load, axial load and swinging 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.

[0022] As a specific embodiment of the improvement, 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, 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 push rod end 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 is possible to provide more space for connection with the radial load actuator 6, the axial load actuator 7 and the swing actuator 8 under the premise that the loading block 42 can transfer the load to the wheel hub bearing.

[0023] As a specific embodiment of the improvement, the equipment frame 1 is hingedly installed with a right-angle plate 11 at a position below 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 the box seat 31 downward 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 thus reduces the height of the overall equipment.

[0024] 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 swinging actuator 8. The middle part of the spring 422 is fixedly mounted on the equipment frame 1. Through the setting of the spring 422, it is possible to effectively provide a buffering effect during the load application process, thereby ensuring the stability of the load application process.

[0025] As a specific embodiment of the improvement, 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 on 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 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. Through the arrangement of the above structure, the angle detection can be simply and effectively realized by utilizing the cooperation of the detection rod 424 and the insertion rod 431.

[0026] As a specific embodiment of the improvement, 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.

[0027] To sum up, the multi-axis fretting wear testing device for the wheel hub bearing of this embodiment adopts the arrangement of the equipment frame 1, the hydraulic oil source system assembly 2, the temperature simulation environment chamber 3, the tooling structure component 4 and the auxiliary lifting mechanism 5, which can simply and effectively constitute a device for performing multi-axis fretting wear testing on the wheel hub bearing, thereby effectively realizing the study of the influence of the fretting wear phenomenon on the service life of the bearing.

[0028] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A multi-axis fretting wear testing device for wheel hub bearings, characterized by: 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 the wheel hub bearing to be tested, the tooling structure component (4) is installed in the temperature simulation environment box (3) to realize the micro-wear operation of the wheel hub bearing, 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 a radial load actuator (6) is provided in the equipment frame (1). ), 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 structural component (4), 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); the tooling structural 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 mounted on the box seat ( 31), the base plate (45) is coaxially fixedly mounted on the center 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; 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 lower side of the horizontal rod is fixed with a loading rod (421), the radial load actuator (6), the axial load actuator (7) and the swing actuator (8) are all hydraulic push rods, the push rod end of the axial load actuator (7) is hingedly mounted on the side of the loading rod (421), the lower end of the loading rod (421) is linked to the push rod end of the radial load actuator (6), and the push rod end of the swing actuator (8) is hingedly mounted on the side of the loading rod (421) and is located below the push rod end of the axial load actuator (7);The temperature simulation environment box (3) includes a box base (31) and a box cover (32), wherein the box base (31) is an L-shaped plate structure, and 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 base (31) so that the box cover (32) can be installed on the box base (31) by flipping left and right. The lower side of the box cover (32) and the side facing the box base (31) are open, so that after the box cover (32) is flipped to the right, it is combined with the box base (31) to form a space. The tooling structural component (4) is fixedly installed on the box base (31). The box seat (31) is provided with two vertically distributed vent holes (321), and the two vent holes (321) are connected to the high and low temperature units 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 units; the equipment rack (1) is hingedly mounted with a right angle plate (11) at a position below the box seat (31), and the right angle of the right angle plate (11) is hingedly mounted to the equipment rack (1), and the lower end of the loading rod (421) penetrates the box seat (31) downward 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 hinged on another 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); 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), and the middle part of the spring (422) is fixedly installed on the equipment frame (1); the vertical rod of the loading block (42) is fixed with an angular spring on the side facing away from the outer ring of the bearing to be tested. An angle encoder (423) is provided, wherein a detection rod (424) is fixed to the rotating shaft of the angle encoder (423), and a U-shaped groove is provided on 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 the connecting disk (43) facing away from the base disk (45), and 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); a scale is fixed to the side of the fixing plate (41), and a plurality of long grooves are provided on the fixing plate (41) for mounting the base disk (45).

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