A method and device for detecting the positive clearance of a hub bearing

Abstract

The present application relates to the technical field of hub bearing, in particular to a kind of hub bearing positive play detection method and device.Method includes placing hub bearing in support unit, so that the flange plate of inner ring flange of hub bearing is set up upwards, and support unit is supported at the bottom end of outer ring unit of hub bearing.Based on hub bearing is located in support unit, outer ring unit is pressed tightly fixed downward.Based on the completion of outer ring unit fixation, downward first pressure is applied to the inner ring unit of hub bearing.Based on the first pressure applied to inner ring unit, control displacement detector abuts the top of down pressure assembly.Based on displacement detector abuts the top of down pressure assembly, vertical upward first thrust is applied to the bottom end of inner ring unit.Based on the first thrust applied to inner ring unit, the distance that inner ring unit is detected to move upwards by displacement detector is obtained, and detection is completed.This solves the problem of how to ensure the accuracy of positive play detection while simplifying the structure of detection equipment.

Description

Technical Field

[0001] This invention relates to the field of wheel hub bearing technology, and more specifically, to a method and apparatus for detecting positive clearance in wheel hub bearings. Background Technology

[0002] As a core component connecting the wheel and axle, wheel bearings must simultaneously withstand radial loads (such as vehicle weight) and axial loads (such as forces generated during steering and braking). They typically consist of key components such as an inner ring, outer ring, and rolling elements. Wheel bearing clearance is divided into positive clearance and negative clearance. Positive clearance refers to the gap between the rolling elements and the raceways of the inner and outer rings, while negative clearance refers to the interference fit between the rolling elements and the raceways of the inner and outer rings. During wheel bearing manufacturing, the end of the inner ring flange furthest from the flange plate needs to be rolled to restrict the axial position of the mating inner ring, i.e., the smaller inner ring. Inspecting the positive clearance of the wheel bearing before the inner ring flange furthest from the flange plate is rolled is crucial for quality control. Typically, the positive clearance of the inner ring flange before rolling is 0.04mm to 0.06mm. The axial clearance after rolling is controlled to -0.025mm to -0.005mm, which is the negative clearance. The core objective is to ensure that the bearing clearance is within the design range under actual operating conditions, thereby guaranteeing the vehicle's driving performance and operational safety.

[0003] In the process of positive clearance testing of wheel hub bearings, existing technologies face a contradiction between simplifying the equipment structure and ensuring testing accuracy. Current testing equipment often has a complex structure design to achieve high testing accuracy, resulting in large equipment size, cumbersome operation, and high cost. On the other hand, if one blindly pursues simplification of the equipment structure, it is easy to reduce the testing accuracy due to insufficient consideration of testing stability and accuracy during the simplification process, thus failing to meet actual testing requirements. Summary of the Invention

[0004] To address the challenge of simplifying the structure of testing equipment while maintaining the accuracy of positive clearance detection, this invention provides a method and apparatus for detecting positive clearance in wheel hub bearings.

[0005] In a first aspect, the present invention provides a method for detecting positive clearance of a wheel hub bearing, the method comprising:

[0006] The hub bearing is placed on the support unit so that the axis of the hub bearing is vertical, the flange of the inner ring flange of the hub bearing faces upward, and the support unit is supported on the bottom end of the outer ring unit of the hub bearing.

[0007] Since the hub bearing is located in the support unit, the control clamping unit presses the outer ring unit downwards and fixes it.

[0008] With the outer ring unit fixed in place, the pressing assembly applies a downward first pressure to the inner ring unit of the wheel hub bearing; wherein, while the pressing assembly applies the first pressure to the inner ring unit, the pressing assembly has an upward movement allowance; the inner ring unit includes the inner ring flange and a mating inner ring; the inner ring flange includes an integrally formed inner ring body and the flange plate; the inner ring body and the mating inner ring are interference-fitted;

[0009] The first pressure is applied to the inner ring unit based on the pressing component, and the displacement detector is controlled to abut against the top of the pressing component;

[0010] Based on the displacement detector abutting against the top of the pressing component, the lifting component is controlled to apply a vertically upward first thrust to the bottom end of the inner ring unit; wherein, the first thrust is greater than the first pressure.

[0011] The first thrust is applied to the inner ring unit by the lifting component, and the upward displacement distance of the inner ring unit detected by the displacement detector is obtained, thus completing the detection.

[0012] In some embodiments, the step of controlling the pressing assembly to apply a downward first pressure to the inner ring unit of the wheel hub bearing, based on the completion of the outer ring unit fixing, includes:

[0013] Once the outer ring unit is fixed, the control pole is adjusted to the target height.

[0014] Based on the fact that the upright is located at the target height, the control bar is rotated to the top of the wheel hub bearing so that the pressure block presses against the top of the inner ring unit of the wheel hub bearing. Under the action of the counterweight unit, the pressure block applies a downward first pressure to the inner ring unit.

[0015] In some embodiments, based on the completion of the detection, the detection device is reset to the initial state, and the detection count is incremented by 1 to update the detection count; wherein, in the initial state, the lifting assembly, the clamping unit, and the pressing assembly are all disengaged from the wheel hub bearing, and the displacement detector is disengaged from the pressing assembly;

[0016] Based on the completion of the update of the number of detections, determine whether the number of detections has reached the first count;

[0017] Based on the number of detections reaching the first number, the value of the target height is adjusted according to the number of detections, and the target height is negatively correlated with the number of detections;

[0018] Based on the initial state of the detection device, the wheel hub bearing that has completed the detection is removed from the support unit;

[0019] After the numerical adjustment based on the target height is completed, the next wheel bearing to be tested is returned to the step of placing the wheel bearing on the support unit so that the axis of the wheel bearing is vertically set, the flange of the inner ring flange of the wheel bearing is set upward, and the support unit is supported at the bottom end of the outer ring unit of the wheel bearing.

[0020] In some embodiments, based on the completion of the detection count update, it is determined whether the detection count has reached the second count;

[0021] Based on the number of tests reaching the second number, the position and model of the counterweight unit are adjusted according to the number of tests; the distance between the counterweight unit and the upright is negatively correlated with the number of tests; the model includes weight;

[0022] Once the counterweight unit adjustment is complete, the next wheel bearing to be tested is returned to the step of placing the wheel bearing on the support unit so that the axis of the wheel bearing is vertically oriented, the flange of the inner ring flange of the wheel bearing faces upward, and the support unit is supported at the bottom end of the outer ring unit of the wheel bearing.

[0023] In some embodiments, the second number is greater than the first number.

[0024] In some embodiments, based on the upright being at the target height, controlling the crossbar to rotate above the hub bearing so that the pressure block presses against the top of the inner ring unit of the hub bearing, and under the action of the counterweight unit, the pressure block applies a downward first pressure to the inner ring unit, including:

[0025] Based on the fact that the upright is at the target height, the crossbar is controlled to rotate around the first axis and the second axis until the crossbar rotates above the hub bearing, so that the pressure block presses against the top of the inner ring unit of the hub bearing. Under the action of the counterweight unit, the pressure block applies a downward first pressure to the inner ring unit; wherein, the first axis and the second axis are perpendicular; the first axis is the axis of the upright; the second axis is horizontally arranged.

[0026] In some embodiments, the step of controlling the lifting assembly to apply a first vertical upward thrust to the bottom end of the inner ring unit based on the displacement detector abutting against the top of the pressing assembly includes:

[0027] Based on the displacement detector abutting against the top of the pressing assembly, the lifting assembly is controlled to apply a vertically upward first thrust to the bottom end of the inner ring flange and / or the mating inner ring.

[0028] Secondly, the present invention provides a wheel hub bearing positive clearance detection device, wherein the wheel hub bearing positive clearance detection device is applied to the wheel hub bearing positive clearance detection method of any of the above embodiments, and the wheel hub bearing positive clearance detection device comprises:

[0029] Rack components;

[0030] A positioning assembly, comprising a support unit and a clamping unit; the support unit supports the outer ring unit of the wheel hub bearing; the clamping unit clamps the outer ring unit of the wheel hub bearing; the support unit and the clamping unit are detachably connected to the frame assembly.

[0031] A downward pressure assembly includes a linkage unit and a counterweight unit; the linkage unit is movably connected to the frame assembly; the position of the linkage unit is adjustable; the counterweight unit is connected to the linkage unit; the downward pressure assembly is used to provide a downward first pressure to the inner ring unit of the wheel hub bearing;

[0032] A lifting assembly includes a lifting seat and a lifting drive unit; the lifting seat is connected to the lifting drive unit; the lifting drive unit drives the lifting seat to move up and down; the lifting assembly provides an upward first thrust to the bottom end of the inner ring unit of the wheel hub bearing; the first thrust is greater than a first pressure; the lifting drive unit is detachably connected to the frame assembly.

[0033] The detection component includes a displacement detector connected to the frame assembly; the position of the displacement detector is adjustable.

[0034] In some embodiments, the linkage unit includes an upright, a crossbar, and a pressure block; the upright is vertically arranged; the upright is rotatably connected to the frame assembly; the axis of the upright is a first axis; the upright rotates about the first axis; the height of the upright is adjustable; the crossbar and the upright are rotatably connected about a second axis; the second axis is horizontally arranged; the counterweight unit is connected to the crossbar; the pressure block is rotatably connected to the crossbar about a third axis; the third axis is parallel to the second axis.

[0035] In some embodiments, the distance between the counterweight unit and the second axis is greater than the distance between the pressure block and the third axis; the distance between the counterweight unit and the second axis is adjustable.

[0036] To address the problem of simplifying the structure of the detection equipment while ensuring the accuracy of positive clearance detection, this invention has the following advantages:

[0037] By placing the wheel hub bearing on the support unit with the axis vertically set, the support unit supporting the bottom of the outer ring unit, controlling the clamping unit to fix the outer ring unit, controlling the pressing component to apply a first pressure with upward movement margin to the inner ring unit, controlling the displacement detector to abut the top of the pressing component, and controlling the lifting component to apply a first thrust greater than the first pressure to the bottom of the inner ring unit, the upward movement distance of the inner ring unit detected by the displacement detector is obtained. This achieves axial movement of the inner ring unit under the action of the lifting thrust after maintaining a set gap with the rolling element, allowing the displacement detector to quickly obtain the positive clearance value of the inner ring unit before it is rolled. This simplifies the equipment structure for positive clearance detection of wheel hub bearings and ensures detection accuracy, ultimately guaranteeing the negative clearance accuracy of the wheel hub bearing after assembly. Attached Figure Description

[0038] Figure 1 A flowchart illustrating an embodiment of a method for detecting positive clearance of wheel hub bearings is shown.

[0039] Figure 2 A schematic diagram of the structure of a detection device according to one embodiment is shown;

[0040] Figure 3 It shows Figure 2 A top view of the detection device in the diagram;

[0041] Figure 4 It shows Figure 2 A schematic diagram of the testing device used to test wheel hub bearings.

[0042] Reference numerals: 10 Hub bearing; 11 Inner ring unit; 111 Inner ring flange; 1111 Inner ring body; 1112 Flange; 112 Mating inner ring; 12 Outer ring unit; 13 Rolling element; 14 Cage; 20 Frame assembly; 30 Positioning assembly; 31 Support unit; 311 Support seat; 312 Leg; 32 Clamping unit; 321 Clamping rod; 322 Clamping drive unit; 40 Pressing assembly; 41 Linkage unit; 411 Vertical rod; 412 Horizontal rod; 413 Clamping block; 42 Counterweight unit; 43 Overlapping unit; 50 Lifting assembly; 51 Lifting seat; 52 Lifting drive unit; 53 First arcuate surface; 54 Second arcuate surface; 60 Detection assembly; 61 Displacement detector; 62 Rotating frame. Detailed Implementation

[0043] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the disclosure.

[0044] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily used to better describe this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art will understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art will understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0045] In the positive clearance testing of wheel hub bearings (Type 10), there is a technical challenge in simultaneously simplifying the equipment structure and ensuring testing accuracy. This is because the coordinated operation of various components during testing often requires complex connection and control structures, resulting in a cumbersome overall equipment structure. Furthermore, the precision requirements for the fit between components during force transmission and displacement detection are extremely high. Lowering the component fit standards to simplify the structure can easily lead to increased testing errors, making it difficult to guarantee testing accuracy, thus creating a contradiction between structural simplification and accuracy assurance.

[0046] Example 1:

[0047] To address the aforementioned problems, this embodiment discloses a method for detecting the positive clearance of a wheel hub bearing 10. In this embodiment, as follows... Figure 1 As shown, the method for detecting the positive clearance of the hub bearing 10 includes steps S10 to S60, and the detailed steps are described below:

[0048] In step S10, the hub bearing 10 is placed on the support unit 31 so that the axis of the hub bearing 10 is vertically oriented, the flange 1112 of the inner ring flange 111 of the hub bearing 10 faces upward, and the support unit 31 is supported by the bottom end of the outer ring unit 12 of the hub bearing 10. This step, by standardizing the placement posture and support position of the hub bearing 10, ensures the stability of the initial state during testing, provides a unified benchmark for subsequent operations, and ensures the consistency of testing.

[0049] In step S20, based on the hub bearing 10 being located in the support unit 31, the clamping unit 32 is controlled to press and fix the outer ring unit 12 downwards. By fixing the outer ring unit 12, displacement of the outer ring unit 12 during the detection process can be avoided, providing a stable reference for the force and displacement detection of the inner ring unit 11, and reducing detection errors caused by outer ring wobbling.

[0050] In step S30, based on the completion of the outer ring unit 12 being fixed, the pressing assembly 40 is controlled to apply a downward first pressure to the inner ring unit 11 of the hub bearing 10. While the pressing assembly 40 is applying the first pressure to the inner ring unit 11, it has an upward movement margin. That is, the pressing assembly 40 can swing or move up and down. Figure 4 As shown, the inner ring unit 11 includes an inner ring flange 111 and a mating inner ring 112. The inner ring flange 111 includes an integrally formed inner ring body 1111 and a flange 1112. The flange 1112 is located at one end of the inner ring body 1111. The mating inner ring 112 is located at the other end of the inner ring body 1111. The inner ring body 1111 and the mating inner ring 112 are interference-fitted. Figure 3 As shown, during the positive clearance test, the end of the inner ring body 1111 away from the flange 1112 has not yet undergone the edge-rolling process to limit the position of the mating inner ring 112. This results in a larger axial movement of the inner ring body 1111. Simultaneously, it facilitates the adjustment of the clearance and interference between the rolling elements 13 of the wheel hub bearing 10 and the inner ring unit 11 and outer ring unit 12 after the positive clearance test. Applying the first pressure creates a predetermined pre-tightening clearance between the inner ring unit 11 and the rolling elements 13 to simulate the assembly conditions of the wheel hub bearing 10. The upward movement allowance provides space for the subsequent upward movement of the inner ring unit 11. The structural features of the inner ring unit 11 ensure the overall stability of its stress distribution, facilitating effective force transmission.

[0051] In step S40, based on the application of a first pressure to the inner ring unit 11 by the pressing component 40, the displacement detector 61 is controlled to abut against the top of the pressing component 40. The contact between the displacement detector 61 and the pressing component 40 can capture the displacement changes of the pressing component 40 with the inner ring unit 11 in real time, providing a direct data acquisition point for accurately obtaining the axial movement distance of the inner ring unit 11.

[0052] In step S50, based on the displacement detector 61 abutting against the top of the pressing assembly 40, the lifting assembly 50 is controlled to apply a vertically upward first thrust to the bottom end of the inner ring unit 11. The first thrust is greater than the first pressure. This setting of the first thrust being greater than the first pressure allows the inner ring unit 11 to move upward against the first pressure, thus fully manifesting the positive clearance between the inner ring unit 11 and the rolling element 13 through axial movement.

[0053] In step S60, a first thrust is applied to the inner ring unit 11 based on the lifting component 50, and the upward movement distance of the inner ring unit 11 detected by the displacement detector 61 is obtained, thus completing the detection. By obtaining this movement distance, the positive clearance value of the inner ring unit 11 before it is rolled can be directly obtained, which ultimately helps to ensure the negative clearance accuracy of the wheel hub bearing 10 after the rolled assembly.

[0054] Furthermore, based on the completion of the outer ring unit 12 being fixed, the control pressing assembly 40 applies a downward first pressure to the inner ring unit 11 of the hub bearing 10, i.e., step S30, which includes:

[0055] Step S31: After the outer ring unit 12 is fixed, the control rod 411 is adjusted to the target height. By adjusting the rod 411 to the target height, the height requirements of different specifications of wheel hub bearings 10 can be adapted, providing a positional basis for the pressure block 413 to be accurately aligned with the top of the inner ring unit 11 (i.e., flange 1112), and ensuring the accuracy of pressure application.

[0056] Step S32: Based on the upright 411 being at the target height, the horizontal bar 412 is rotated above the hub bearing 10, so that the pressure block 413 presses against the top of the inner ring unit 11 of the hub bearing 10. Under the action of the counterweight unit 42, the pressure block 413 applies a downward first pressure to the inner ring unit 11. Figure 4 As shown, the first pressure is applied by the pressure block 413 in combination with the lever principle, which can ensure the stability and uniformity of the pressure, and eliminates the need for a complex power device, thereby simplifying the structure and reducing the cost of the equipment.

[0057] In some other embodiments, the method for detecting the positive clearance of the hub bearing 10 further includes step S70, which includes steps S71 to S75:

[0058] Step S71: Based on the completion of the detection, the detection device is reset to its initial state, and the detection count is incremented by 1 to update the detection count. In the initial state, the lifting assembly 50, the clamping unit 32, and the pressing assembly 40 are all disengaged from the wheel hub bearing 10, and the displacement detector 61 is disengaged from the pressing assembly 40. The reset operation prevents each assembly from interfering with the detection of the next wheel hub bearing 10, and updating the detection count provides a basis for subsequent adjustment operations.

[0059] Step S72: Based on the completion of the detection count update, determine whether the detection count has reached the initial count. For example... Figure 4 As shown, the counterweight unit 42 is located near the end of the crossbar 412 away from the vertical bar 411 to apply initial pressure to the flange 1112 via leverage. However, with increasing testing frequency, the crossbar 412 tilts and deforms due to the pressure from the counterweight unit 42, causing a difference in the force exerted on the flange 1112 by the first and second sides of the pressure block 413. The downward pressure on the first side is less than that on the second side. The first side of the pressure block 413 is closer to the vertical bar 411; the second side of the pressure block 413 is closer to the counterweight unit 42. This determination helps determine whether the target height needs adjustment to make the crossbar 412 more horizontal, and it is crucial to ensure that the adjustment is performed at the appropriate time to avoid unnecessary adjustments affecting the test results. Simultaneously, pre-adjustment ensures a uniform force distribution within the bearing area of ​​the pressure block 413 and the flange 1112, improving the accuracy of the test results.

[0060] Step S73: Based on the number of tests reaching the first count, adjust the target height value according to the number of tests. The target height is negatively correlated with the number of tests. Adjusting the target height as the number of tests increases can adapt to the slight changes caused by multiple uses of the equipment and ensure that the inner ring unit 11 is subjected to uniform force.

[0061] Step S74: Based on the initial state of the testing device, the tested wheel hub bearing 10 is removed from the support unit 31; this facilitates quick replacement of the wheel hub bearing 10 to be tested and ensures the continuity of the testing process.

[0062] Step S75: After the numerical adjustment based on the target height is completed, the next wheel hub bearing 10 to be inspected is moved back to the previous step of placing the wheel hub bearing 10 on the support unit 31 so that the axis of the wheel hub bearing 10 is vertically oriented, the flange 1112 of the inner ring flange 111 of the wheel hub bearing 10 faces upward, and the support unit 31 is supported at the bottom end of the outer ring unit 12 of the wheel hub bearing 10, i.e., executing step S10. This creates a loop in the inspection process, improves inspection efficiency, and ensures the orderly conduct of batch inspections.

[0063] In some other embodiments, the method for detecting the positive clearance of the hub bearing 10 further includes step S80, which includes steps S81 to S83:

[0064] Step S81: Based on the completion of the detection count update, determine whether the detection count has reached the second count; this determination can determine whether the counterweight unit 42 needs to be adjusted, ensuring the necessity and timeliness of the adjustment operation.

[0065] Step S82: Based on the number of tests reaching the second count, adjust the position and model of the counterweight unit 42 according to the number of tests; the distance between the counterweight unit 42 and the upright 411 is negatively correlated with the number of tests; the model includes weight; by adjusting the position and model of the counterweight unit 42, the magnitude of the first pressure applied to the inner ring unit 11 can be changed to adapt to the force changes of the equipment after multiple tests, ensuring that the inner ring unit 11 is subjected to uniform force.

[0066] Step S83: Based on the completion of the adjustment of the counterweight unit 42, the next wheel hub bearing 10 to be tested is placed back to execute the step of placing the wheel hub bearing 10 on the support unit 31 so that the axis of the wheel hub bearing 10 is set vertically and the support unit 31 is supported on the bottom end of the outer ring unit 12 of the wheel hub bearing 10; so that the testing process continues and the stability and continuity of batch testing are guaranteed.

[0067] Furthermore, the second number is greater than the first number; by setting the second number to be greater than the first number, as the number of tests accumulates, the pressure adjustment can be gradually refined by first adjusting the upright 411 and then adjusting the counterweight unit 42, thus avoiding excessive fluctuations in the first pressure caused by adjusting the counterweight unit 42, thereby improving the adjustment accuracy and reducing the adjustment difficulty.

[0068] Furthermore, based on the upright 411 being at the target height, the horizontal bar 412 is rotated above the hub bearing 10 so that the pressure block 413 presses against the top of the inner ring unit 11 of the hub bearing 10. Under the action of the counterweight unit 42, the pressure block 413 applies a downward first pressure to the inner ring unit 11, which is step S32. Step S32 includes:

[0069] Step S321: Based on the upright 411 being at the target height, control the horizontal bar 412 to rotate around the first axis and the second axis until the horizontal bar 412 rotates above the hub bearing 10, so that the pressure block 413 presses against the top of the inner ring unit 11 of the hub bearing 10. Under the action of the counterweight unit 42, the pressure block 413 applies a downward first pressure to the inner ring unit 11. The first axis and the second axis are perpendicular; the first axis is the axis of the upright 411; the second axis is horizontal. The horizontal bar 412 can flexibly adjust its posture by rotating around mutually perpendicular axes to ensure that the pressure block 413 can accurately align and press against inner ring units 11 of different specifications, ensuring the stable application of the first pressure. This is the posture adjustment method of the horizontal bar 412.

[0070] In step S322, based on the displacement detector 61 abutting against the top of the pressing assembly 40, the lifting assembly 50 is controlled to apply a vertically upward first thrust to the bottom end of the inner ring flange 111 and / or the mating inner ring 112 of the inner ring unit 11. By selecting to apply the thrust to the inner ring flange 111 and / or the mating inner ring 112, the force application point can be adjusted according to the structural characteristics of the inner ring unit 11, so as to avoid relative misalignment between the inner ring flange 111 and the mating inner ring 112 due to the lack of rolled edges, thus ensuring the structural stability of the inner ring unit 11 during the detection process and improving the detection accuracy.

[0071] Example 2:

[0072] This embodiment discloses a detection device, which is applied to the positive clearance detection method of wheel hub bearing 10 in any of the above embodiments. For example... Figure 2 As shown, the testing device includes: a frame assembly 20, a positioning assembly 30, a pressing assembly 40, a lifting assembly 50, and a testing assembly 60. The frame assembly 20 is mainly used to support other components, facilitating the assembly of each component. Figure 2 , Figure 4 As shown, the positioning assembly 30 includes a support unit 31 and a clamping unit 32. The support unit 31 supports the outer ring unit 12 of the wheel hub bearing 10. The clamping unit 32 clamps the outer ring unit 12 of the wheel hub bearing 10. The support unit 31 and the clamping unit 32 are detachably connected to the frame assembly 20. The pressing assembly 40 includes a connecting rod unit 41 and a counterweight unit 42. The connecting rod unit 41 is movably connected to the frame assembly 20. The position of the connecting rod unit 41 is adjustable. The counterweight unit 42 is connected to the connecting rod unit 41. The pressing assembly 40 provides a downward first pressure to the inner ring unit 11 of the wheel hub bearing 10. Figure 2 , Figure 4 As shown, the lifting assembly 50 includes a lifting seat 51 and a lifting drive unit 52. The lifting seat 51 is connected to the lifting drive unit 52. The lifting drive unit 52 drives the lifting seat 51 to rise and fall. The lifting assembly 50 provides an upward first thrust to the bottom end of the inner ring unit 11 of the wheel hub bearing 10. The first thrust is greater than the first pressure. The lifting drive unit 52 is detachably connected to the frame assembly 20. The detection assembly 60 includes a displacement detector 61, which is connected to the frame assembly 20. The position of the displacement detector 61 is adjustable. The division of labor among the components ensures the realization of functions such as support, fixation, pressure application, and detection during the detection process. The detachable connection and adjustable position design facilitate the installation and maintenance of the equipment and adapt to the detection needs of wheel hub bearings 10 of different specifications, ensuring the feasibility and flexibility of the detection.

[0073] In other embodiments, such as Figure 4As shown, the hub bearing 10 includes an inner ring unit 11, an outer ring unit 12, rolling elements 13, and a cage 14. The inner ring unit 11 includes an inner ring flange 111 and a mating inner ring 112. The inner ring flange 111 includes an integrally formed inner ring body 1111 and a flange 1112. The flange 1112 is located at one end of the inner ring body 1111. The mating inner ring 112 is located at the other end of the inner ring body 1111. The inner ring body 1111 and the mating inner ring 112 are interference-fitted. The outer ring unit 12 is fitted onto the inner ring body 1111 and the mating inner ring 112. Rolling elements 13 and a cage 14 are disposed on the raceway between the outer ring unit 12 and the inner ring unit 11. Figure 2 As shown, the support unit 31 includes a support base 311 and a support leg 312. One end of the support leg 312 is detachably connected to the support base 311, and the other end is detachably connected to the frame assembly 20. The support base 311 and the frame assembly 20 are spaced apart. Figure 4 As shown, a pre-drilled hole is provided in the center of the support base 311 so that the end of the wheel hub bearing 10 away from the flange 1112 can pass through. A contoured groove is provided on the side of the support base 311 near the wheel hub bearing 10 to facilitate the fitting and positioning of the outer ring unit 12 of the wheel hub bearing 10. Figure 2 , Figure 3 As shown, multiple clamping units 32 are circumferentially spaced around the support unit 31 to facilitate multi-point positioning and fixing of the wheel hub bearing 10. The clamping unit 32 includes a clamping rod 321 and a clamping drive unit 322. The clamping drive unit 322 provides clamping force to the clamping rod 321. One end of the clamping rod 321 abuts against the side of the outer ring unit 12 of the wheel hub bearing 10 away from the support seat 311. Figure 2 , Figure 3 As shown, the detection assembly 60 also includes a rotating frame 62. One end of the rotating frame 62 is detachably connected to the frame assembly 20, and the other end is rotatably connected to the displacement detector 61. The rotating frame 62 makes the position of the displacement detector 61 adjustable, facilitating detection.

[0074] In other embodiments, such as Figure 2 , Figure 4 As shown, the lifting assembly 50 also includes a first arcuate surface 53 and a second arcuate surface 54. The lifting seat 51 is recessed on the side near the lifting drive part 52, moving away from the lifting drive part 52 to form the first arcuate surface 53. The lifting drive part 52 is protruding on the side near the lifting seat 51, moving towards the lifting seat 51 to form the second arcuate surface 54. The radius of the first arcuate surface 53 is larger than the radius of the second arcuate surface 54. This arcuate surface design allows the lifting seat 51 to automatically level itself when it abuts against the hub bearing 10, facilitating the application of thrust to the inner ring unit 11. A contour groove can be formed on the side of the lifting seat 51 near the inner ring unit 11 to simultaneously abut against the inner ring body 1111 and the mating inner ring 112, preventing misalignment between the inner ring body 1111 and the mating inner ring 112 due to single-force application. Figure 2, Figure 3 As shown, the pressing assembly 40 also includes an overlapping unit 43. One end of the overlapping unit 43 is detachably connected to the frame assembly 20, and the other end extends away from the frame assembly 20. When the wheel hub bearing 10 is detected to have positive clearance, the end of the crossbar 412 away from the upright 411 is suspended. When the wheel hub bearing 10 is removed from the detection device, the end of the crossbar 412 away from the upright 411 can be swung and adjusted to be placed on the overlapping unit 43, thus preventing the counterweight unit 42 from bending the crossbar 412 due to the crossbar 412 being suspended for a long time.

[0075] Furthermore, such as Figure 2 , Figure 3 As shown, the linkage unit 41 includes a vertical rod 411, a horizontal rod 412, and a pressure block 413. The vertical rod 411 is vertically arranged. The vertical rod 411 is rotatably connected to the frame assembly 20. The axis of the vertical rod 411 is a first axis. The vertical rod 411 rotates around the first axis. The height of the vertical rod 411 is adjustable. The horizontal rod 412 and the vertical rod 411 are rotatably connected around a second axis. The second axis is horizontally arranged. The counterweight unit 42 is connected to the horizontal rod 412. The pressure block 413 is rotatably connected to the horizontal rod 412 around a third axis. The third axis is parallel to the second axis. The multi-axis rotatable connection and height-adjustable design allow the attitude and position of the linkage unit 41 to be flexibly adjusted, ensuring that the pressure block 413 can accurately align with the inner ring unit 11, ensuring the effective application of the first pressure.

[0076] Furthermore, such as Figure 2 , Figure 3 As shown, the distance between the counterweight unit 42 and the second axis is greater than the distance between the pressure block 413 and the third axis. The distance between the counterweight unit 42 and the second axis is adjustable. The distance design utilizes the lever principle, allowing the relatively small counterweight unit 42 to generate the required first pressure, reducing the weight requirement of the counterweight unit 42 and thus reducing costs. The adjustable distance allows for flexible changes in pressure to adapt to the pressure requirements of different testing scenarios.

[0077] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes may be made in form and detail without departing from the scope of this disclosure.

Claims

1. A method for detecting positive clearance of wheel hub bearings, characterized in that, The method for detecting positive clearance of wheel hub bearings includes: The hub bearing is placed on the support unit so that the axis of the hub bearing is vertical, the flange of the inner ring flange of the hub bearing faces upward, and the support unit is supported on the bottom end of the outer ring unit of the hub bearing. Since the hub bearing is located in the support unit, the control clamping unit presses the outer ring unit downwards and fixes it. With the outer ring unit fixed in place, the pressing assembly applies a downward first pressure to the inner ring unit of the wheel hub bearing; wherein, while the pressing assembly applies the first pressure to the inner ring unit, the pressing assembly has an upward movement allowance; the inner ring unit includes the inner ring flange and a mating inner ring; the inner ring flange includes an integrally formed inner ring body and the flange plate; the inner ring body and the mating inner ring are interference-fitted; The first pressure is applied to the inner ring unit based on the pressing component, and the displacement detector is controlled to abut against the top of the pressing component; Based on the displacement detector abutting against the top of the pressing component, the lifting component is controlled to apply a vertically upward first thrust to the bottom end of the inner ring unit; wherein, the first thrust is greater than the first pressure. The first thrust is applied to the inner ring unit by the lifting component, and the upward displacement distance of the inner ring unit detected by the displacement detector is obtained, thus completing the detection.

2. The method for detecting positive clearance of a wheel hub bearing according to claim 1, characterized in that, The step of controlling the pressing assembly to apply a downward first pressure to the inner ring unit of the wheel hub bearing, based on the fixed outer ring unit, includes: Once the outer ring unit is fixed, the control pole is adjusted to the target height. Based on the fact that the upright is located at the target height, the control bar is rotated to the top of the wheel hub bearing so that the pressure block presses against the top of the inner ring unit of the wheel hub bearing. Under the action of the counterweight unit, the pressure block applies a downward first pressure to the inner ring unit.

3. The method for detecting positive clearance of a wheel hub bearing according to claim 2, characterized in that, The method for detecting positive clearance of wheel hub bearings also includes: Based on the completion of the detection, the detection device is reset to the initial state, and the detection count is incremented by 1 to update the detection count; wherein, in the initial state, the lifting assembly, the clamping unit, and the pressing assembly are all disengaged from the wheel hub bearing, and the displacement detector is disengaged from the pressing assembly; Based on the completion of the update of the number of detections, determine whether the number of detections has reached the first count; Based on the number of detections reaching the first number, the value of the target height is adjusted according to the number of detections, and the target height is negatively correlated with the number of detections; Based on the initial state of the detection device, the wheel hub bearing that has completed the detection is removed from the support unit; After the numerical adjustment based on the target height is completed, the next wheel bearing to be tested is returned to the step of placing the wheel bearing on the support unit so that the axis of the wheel bearing is vertically set, the flange of the inner ring flange of the wheel bearing is set upward, and the support unit is supported at the bottom end of the outer ring unit of the wheel bearing.

4. The method for detecting positive clearance of a wheel hub bearing according to claim 3, characterized in that, The method for detecting positive clearance of wheel hub bearings also includes: Based on the completion of the update of the detection count, determine whether the detection count has reached the second count; Based on the number of tests reaching the second number, the position and model of the counterweight unit are adjusted according to the number of tests; the distance between the counterweight unit and the upright is negatively correlated with the number of tests; the model includes weight; Once the counterweight unit adjustment is complete, the next wheel bearing to be tested is returned to the step of placing the wheel bearing on the support unit so that the axis of the wheel bearing is vertically oriented, the flange of the inner ring flange of the wheel bearing faces upward, and the support unit is supported at the bottom end of the outer ring unit of the wheel bearing.

5. The method for detecting positive clearance of a wheel hub bearing according to claim 4, characterized in that, The second number is greater than the first number.

6. The method for detecting positive clearance of a wheel hub bearing according to claim 2, characterized in that, Based on the fact that the upright is at the target height, the crossbar is controlled to rotate above the wheel hub bearing so that the pressure block presses against the top of the inner ring unit of the wheel hub bearing. Under the action of the counterweight unit, the pressure block applies a downward first pressure to the inner ring unit, including: Based on the fact that the upright is at the target height, the crossbar is controlled to rotate around the first axis and the second axis until the crossbar rotates above the hub bearing, so that the pressure block presses against the top of the inner ring unit of the hub bearing. Under the action of the counterweight unit, the pressure block applies a downward first pressure to the inner ring unit; wherein, the first axis and the second axis are perpendicular; the first axis is the axis of the upright; the second axis is horizontally arranged.

7. The method for detecting positive clearance of a wheel hub bearing according to claim 1, characterized in that, The step of controlling the lifting assembly to apply a vertically upward first thrust to the bottom end of the inner ring unit based on the displacement detector abutting against the top of the pressing assembly includes: Based on the displacement detector abutting against the top of the pressing assembly, the lifting assembly is controlled to apply a vertically upward first thrust to the bottom end of the inner ring flange and / or the mating inner ring.

8. A testing device, applied to the wheel hub bearing positive clearance testing method according to any one of claims 1-7, characterized in that, The detection device includes: Rack components; A positioning assembly, comprising a support unit and a clamping unit; the support unit supports the outer ring unit of the wheel hub bearing; the clamping unit clamps the outer ring unit of the wheel hub bearing; the support unit and the clamping unit are detachably connected to the frame assembly. A downward pressure assembly includes a linkage unit and a counterweight unit; the linkage unit is movably connected to the frame assembly; the position of the linkage unit is adjustable; the counterweight unit is connected to the linkage unit; the downward pressure assembly is used to provide a downward first pressure to the inner ring unit of the wheel hub bearing; A lifting assembly includes a lifting seat and a lifting drive unit; the lifting seat is connected to the lifting drive unit; the lifting drive unit drives the lifting seat to move up and down; the lifting assembly provides an upward first thrust to the bottom end of the inner ring unit of the wheel hub bearing; the first thrust is greater than a first pressure; the lifting drive unit is detachably connected to the frame assembly. The detection component includes a displacement detector connected to the frame assembly; the position of the displacement detector is adjustable.

9. A detection device according to claim 8, characterized in that, The linkage unit includes an upright, a crossbar, and a pressure block; the upright is vertically arranged; the upright is rotatably connected to the frame assembly; the axis of the upright is a first axis; the upright rotates around the first axis; the height of the upright is adjustable; the crossbar and the upright are rotatably connected around a second axis; the second axis is horizontally arranged; the counterweight unit is connected to the crossbar; the pressure block and the crossbar are rotatably connected around a third axis; the third axis is parallel to the second axis.

10. A detection device according to claim 9, characterized in that, The distance between the counterweight unit and the second axis is greater than the distance between the pressure block and the third axis; the distance between the counterweight unit and the second axis is adjustable.

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