Method and device for detecting positive clearance of hub bearing

Abstract

The invention relates to the technical field of hub bearings, in particular to a hub bearing positive clearance detection method and device. The method comprises the steps that the hub bearing is placed on the supporting unit, so that a flange plate of an inner ring flange of the hub bearing is arranged upwards, and the supporting unit is supported at the bottom end of an outer ring unit of the hub bearing. The outer ring unit is pressed and fixed downwards on the basis that the hub bearing is located on the supporting unit. And on the basis that the outer ring unit is fixed, downward first pressure is applied to the inner ring unit of the hub bearing. The displacement detector is controlled to abut against the top of the downward pressing assembly based on the first pressure applied to the inner ring unit. And based on the fact that the displacement detector abuts against the top of the downward pressing assembly, vertically-upward first thrust is applied to the bottom end of the inner ring unit. And on the basis of applying the first thrust to the inner ring unit, the upward moving distance of the inner ring unit detected by the displacement detector is obtained, and detection is completed. Therefore, the problem of how to simplify the structure of the detection equipment while ensuring the detection precision of the positive clearance is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of wheel hub bearings, and in particular to a method and device for detecting the positive clearance of a wheel hub bearing. Background Art

[0002] As a core component connecting the wheel to the axle, wheel hub bearings must withstand both 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 the inner ring, outer ring, and rolling elements. Wheel hub bearing clearance is categorized as positive and negative. Positive clearance refers to the gap between the rolling elements and the inner and outer ring raceways, while negative clearance refers to the interference fit between the rolling elements and the raceways. During wheel hub bearing manufacturing, the end of the inner ring flange facing away from the flange is crimped to restrict the axial position of the mating inner ring, also known as the small inner ring. Testing the positive clearance of the wheel hub bearing, when the end of the inner ring flange facing away from the flange is not crimped, is crucial for ensuring its quality. Typically, the positive clearance of the inner ring flange of a wheel hub bearing before crimping is between 0.04mm and 0.06mm. After crimping, the axial clearance is controlled between -0.025mm and -0.005mm, also known as negative clearance. The core purpose is to ensure that the bearing clearance under actual working conditions is within the design range, thereby ensuring the vehicle's driving performance and operational safety.

[0003] During wheel hub bearing positive clearance testing, existing technologies face a dilemma between simplifying the equipment structure and ensuring accuracy. To achieve high accuracy, current testing equipment often has complex structural designs, resulting in large size, cumbersome operation, and high costs. However, blindly pursuing simplified equipment structure can lead to insufficient consideration of test stability and accuracy during the simplification process, resulting in reduced accuracy and failure to meet actual testing requirements. Summary of the Invention

[0004] In order to solve the problem of how to simplify the structure of the detection equipment while ensuring the positive clearance detection accuracy, the present invention provides a wheel hub bearing positive clearance detection method and device.

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

[0006] Placing the hub bearing on the support unit so that the axis of the hub bearing is arranged vertically, the flange plate of the inner ring flange of the hub bearing is arranged upward, and the support unit is supported on the bottom end of the outer ring unit of the hub bearing;

[0007] Based on the hub bearing being located on the support unit, controlling the pressing unit to press the outer ring unit downward and fix it;

[0008] Upon completion of the fixing of the outer ring unit, the pressing assembly is controlled to apply a first downward pressure to the inner ring unit of the hub bearing; wherein, when the pressing assembly applies the first pressure to the inner ring unit, the pressing assembly has an upward margin of movement; the inner ring unit comprises the inner ring flange and a mating inner ring; the inner ring flange comprises an integrally formed inner ring body and the flange plate; the inner ring body and the mating inner ring are interference fit;

[0009] Based on the pressing component applying the first pressure to the inner ring unit, controlling the displacement detector to abut against the top of the pressing component;

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

[0011] Based on the first thrust applied by the lifting assembly to the inner ring unit, the upward movement distance of the inner ring unit detected by the displacement detector is obtained, and the detection is completed.

[0012] In some embodiments, controlling the pressing assembly to apply a first downward pressure to the inner ring unit of the hub bearing based on the outer ring unit being fixed comprises:

[0013] Based on the outer ring unit being fixed, the control pole is adjusted to the target height;

[0014] Based on the vertical pole being at the target height, the cross bar is controlled to rotate above the hub bearing so that the pressure block is pressed against the top of the inner ring unit of the hub bearing. Under the action of the counterweight unit, the pressure block applies a first downward pressure to the inner ring unit.

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

[0016] Based on the completion of the update of the detection number, determining whether the detection number has reached the first number;

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

[0018] Based on the detection device being in the initial state, removing the detected hub bearing from the support unit;

[0019] Based on the completion of the numerical adjustment of the target height, the next hub bearing to be tested is placed on the support unit and the step of placing the hub bearing on the support unit is returned to execute so that the axis of the hub bearing is vertically arranged, the flange plate of the inner ring flange of the hub bearing is arranged upward, and the support unit is supported on the bottom end of the outer ring unit of the hub bearing.

[0020] In some embodiments, based on the completion of the update of the number of detections, determining whether the number of detections reaches a second number;

[0021] Based on the number of detections reaching the second number, adjusting the position of the counterweight unit and the model of the counterweight unit according to the number of detections; the distance between the counterweight unit and the vertical pole is negatively correlated with the number of detections; the model includes weight;

[0022] Based on the completion of the adjustment of the counterweight unit, the next wheel hub bearing to be tested is placed on the support unit, and the step of placing the wheel hub bearing on the support unit is returned to execute so that the axis of the wheel hub bearing is vertically arranged, the flange plate of the inner ring flange of the wheel hub bearing is arranged upward, and the support unit is supported on the bottom end of the outer ring unit of the wheel hub bearing.

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

[0024] In some embodiments, based on the vertical rod being at the target height, controlling the crossbar to rotate to above the hub bearing so that the pressure block is pressed 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 first downward pressure on the inner ring unit, including:

[0025] Based on the vertical pole being at the target height, the cross bar is controlled to rotate around the first axis and the second axis until the cross bar rotates to the top of the wheel hub bearing, so that the pressure block is pressed 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 first downward pressure to the inner ring unit; wherein, the first axis and the second axis are perpendicular; the first axis is the axis of the vertical pole; and the second axis is horizontally arranged.

[0026] In some embodiments, 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 first vertical upward thrust to the bottom end of the inner ring flange and / or the mating inner ring.

[0028] In a second aspect, the present invention provides a hub bearing positive clearance detection device, which is applied to the hub bearing positive clearance detection method of any one of the above embodiments, and includes:

[0029] Rack components;

[0030] A positioning assembly, the positioning assembly comprising a supporting unit and a pressing unit; the supporting unit is used to support the outer ring unit of the hub bearing; the pressing unit is used to press the outer ring unit of the hub bearing; the supporting unit and the pressing unit are respectively detachably connected to the frame assembly;

[0031] A downward pressing assembly, comprising a connecting rod unit and a counterweight unit; the connecting rod unit is movably connected to the frame assembly; the position of the connecting rod unit is adjustable; the counterweight unit is connected to the connecting rod unit; the downward pressing assembly is used to provide a first downward pressure on the inner ring unit of the hub bearing;

[0032] A jacking assembly, comprising a jacking seat and a jacking drive unit; the jacking seat is connected to the jacking drive unit; the jacking drive unit drives the jacking seat to move up and down; the jacking assembly is used to provide a first upward thrust to the bottom end of the inner ring unit of the hub bearing; the first thrust is greater than the first pressure; the jacking drive unit is detachably connected to the frame assembly;

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

[0034] In some embodiments, the connecting rod unit includes a vertical rod, a horizontal rod and a pressure block; the vertical rod is vertically arranged; the vertical rod is rotatably connected to the frame assembly; the axis of the vertical rod is a first axis; the vertical rod rotates around the first axis; the height of the vertical rod is adjustable; the horizontal rod and the vertical rod are rotatably connected around a second axis; the second axis is horizontally arranged; the counterweight unit is connected to the horizontal rod; the pressure block is rotatably connected to the horizontal rod around 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; and the distance between the counterweight unit and the second axis is adjustable.

[0036] In order to solve the problem of how to simplify the structure of the detection equipment while ensuring the accuracy of positive clearance detection, the present invention has the following advantages:

[0037] By placing the wheel hub bearing on the support unit so that the axis is set vertically, the support unit supports the bottom end of the outer ring unit, controlling the clamping unit to fix the outer ring unit, controlling the down-pressing component to apply a first pressure with an upward movable margin to the inner ring unit, controlling the displacement detector to abut the top of the down-pressing component, and controlling the lifting component to apply a first thrust greater than the first pressure to the bottom end of the inner ring unit, thereby obtaining the upward movement distance of the inner ring unit detected by the displacement detector, achieving axial movement of the inner ring unit under the action of the lifting thrust after maintaining a set gap with the rolling body, and enabling the displacement detector to quickly obtain the positive clearance value of the inner ring unit before curling, thereby simplifying the equipment structure for positive clearance detection of the wheel hub bearing and ensuring detection accuracy, and ultimately ensuring the negative clearance accuracy after the wheel hub bearing is assembled. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A schematic flow chart of a method for detecting positive clearance of a hub bearing according to an embodiment is shown;

[0039] Figure 2 A schematic structural diagram of a detection device according to an embodiment is shown;

[0040] Figure 3 Shown Figure 2 A schematic top view of the detection device in FIG.

[0041] Figure 4 Shown Figure 2 Schematic diagram of the detection device for detecting wheel hub bearings.

[0042] Figure numerals: 10 wheel 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 retaining frame; 20 frame assembly; 30 positioning assembly; 31 supporting unit; 311 supporting seat; 312 supporting leg; 32 clamping unit; 321 pressure rod; 322 clamping drive unit; 40 pressing assembly; 41 connecting rod unit; 411 vertical rod; 412 horizontal rod; 413 pressure block; 42 counterweight unit; 43 overlapping unit; 50 lifting assembly; 51 lifting seat; 52 lifting drive unit; 53 first arc surface; 54 second arc surface; 60 detection assembly; 61 displacement detector; 62 rotating frame. DETAILED DESCRIPTION

[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 implement the present disclosure, rather than to imply any limitation on the scope of the present disclosure.

[0044] As used herein, the term "including" 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 "based, at least in part, 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." Terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "vertical," "horizontal," "transverse," and "longitudinal" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily intended to better describe the present application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationships. For example, the term "on" may also be used in certain circumstances to indicate a dependency or connection relationship. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances. Furthermore, the terms "installed," "disposed," "provided with," "connected," and "connected" are to 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, an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those skilled in the art, the specific meanings of the above terms in this application will be understood based on the specific circumstances. In addition, the terms "first," "second," etc. are primarily used to distinguish different devices, elements, or components (the specific types and structures of which 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 specified, "plurality" means two or more.

[0045] Testing the positive clearance of the wheel hub bearing 10 presents a technical challenge in simultaneously simplifying the equipment structure and ensuring detection accuracy. This is because the coordinated operation of the various components during the testing process often requires complex connections and control structures, resulting in a cumbersome overall structure. Furthermore, the components must meet extremely high precision requirements for force transmission and displacement detection. Lowering component matching standards to simplify the structure can easily lead to increased detection errors, making it difficult to ensure detection accuracy, thus creating a conflict between structural simplification and precision assurance.

[0046] Example 1:

[0047] In order to solve the above problems, this embodiment discloses a method for detecting the positive clearance of a hub bearing 10. In this embodiment, as shown in FIG. 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 as follows:

[0048] In step S10, the wheel hub bearing 10 is placed on the support unit 31 so that the axis of the wheel hub bearing 10 is vertically oriented, the flange plate 1112 of the inner ring flange 111 of the wheel hub bearing 10 is facing upward, and the support unit 31 is supported by the bottom end of the outer ring unit 12 of the wheel hub bearing 10. This step standardizes the placement and support position of the wheel hub bearing 10, ensuring a stable initial state during testing, providing a unified benchmark for subsequent operations and ensuring consistency in testing.

[0049] In step S20, based on the hub bearing 10 being positioned on the support unit 31, the pressing unit 32 is controlled to press the outer ring unit 12 downward and secure it. By securing the outer ring unit 12, displacement of the outer ring unit 12 is prevented during testing, providing a stable reference for force and displacement testing of the inner ring unit 11 and reducing testing errors caused by outer ring movement.

[0050] In step S30, based on the outer ring unit 12 being fixed, the pressing assembly 40 is controlled to apply a first downward pressure to the inner ring unit 11 of the hub bearing 10. When the pressing assembly 40 applies the first pressure to the inner ring unit 11, the pressing assembly 40 has an upward margin of movement. In other words, 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 inner ring body 1111 and a flange 1112 formed integrally. 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 fit. Figure 3 As shown, during positive clearance testing, the end of the inner ring body 1111 away from the flange 1112 has not yet been crimped to restrict the position of the mating inner ring 112. This allows greater axial movement of the inner ring body 1111 and facilitates adjustment of the clearance and interference fit between the rolling elements 13 of the hub bearing 10 and the inner and outer ring units 11, 12 after positive clearance testing. Applying a first pressure creates a set preload clearance between the inner ring unit 11 and the rolling elements 13, simulating the assembly condition of the hub bearing 10. The upward play reserves space for subsequent upward movement of the inner ring unit 11. The structural features of the inner ring unit 11 ensure its overall force stability, facilitating effective force transmission.

[0051] In step S40, based on the first pressure applied by the hold-down assembly 40 to the inner ring unit 11, the displacement detector 61 is controlled to abut the top of the hold-down assembly 40. The abutment between the displacement detector 61 and the hold-down assembly 40 captures the displacement changes of the hold-down assembly 40 in real time as the inner ring unit 11 moves, providing a direct data collection point for accurately determining the movement distance of the inner ring unit 11.

[0052] In step S50, based on the displacement detector 61 abutting the top of the pressing assembly 40, the lifting assembly 50 is controlled to apply a first vertical upward thrust to the bottom end of the inner ring unit 11. The first thrust is greater than the first pressure. This configuration propels the inner ring unit 11 upward, overcoming the first pressure, and fully realizing the positive clearance between the inner ring unit 11 and the rolling elements 13 through axial play.

[0053] In step S60, the jacking assembly 50 applies a first thrust to the inner ring unit 11, and the displacement detector 61 detects the upward movement distance of the inner ring unit 11, completing the detection. This movement distance directly determines the positive clearance value of the inner ring unit 11 before crimping, ultimately facilitating the accuracy of the negative clearance after crimping assembly of the hub bearing 10.

[0054] Furthermore, based on the outer ring unit 12 being fixed, the pressing assembly 40 is controlled to apply a first downward pressure to the inner ring unit 11 of the hub bearing 10, that is, step S30. Step S30 includes:

[0055] In step S31, based on the outer ring unit 12 being fixed, the control rod 411 is adjusted to the target height; by adjusting the rod 411 to the target height, the height requirements of hub bearings 10 of different specifications can be met, and a position basis is provided for the pressure block 413 to be accurately aligned with the top of the inner ring unit 11 (that is, the flange 1112), thereby ensuring the accuracy of pressure application.

[0056] In step S32, based on the vertical rod 411 being at the target height, the horizontal rod 412 is controlled to rotate to the top of the hub bearing 10 so that the pressing block 413 is pressed against the top of the inner ring unit 11 of the hub bearing 10. Under the action of the counterweight unit 42, the pressing block 413 applies a first downward pressure to the inner ring unit 11. Figure 4 As shown, applying the first pressure by the pressing block 413 in combination with the lever principle can ensure the stability and uniformity of the pressure without requiring a complex power device, thereby simplifying the structure and reducing equipment costs.

[0057] In 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: Upon completion of the test, the detection device is reset to its initial state, and the detection count is incremented by 1 to update the detection count. In this initial state, the lifting assembly 50, the pressing unit 32, and the pressing assembly 40 are all disengaged from the wheel hub bearing 10, and the displacement detector 61 is also disengaged from the pressing assembly 40. This reset prevents any interference between the components and the next wheel hub bearing 10 test. The updated detection count provides a basis for subsequent adjustments.

[0059] Step S72: Based on the completion of the detection number update, determine whether the detection number has reached the first number. Figure 4 As shown, since the counterweight unit 42 is set near the end of the crossbar 412 away from the vertical rod 411, so as to apply a first pressure to the flange 1112 through the lever principle, however, as the number of tests increases, the crossbar 412 tilts and deforms due to the pressure of the counterweight unit 42, resulting in a difference in the force exerted on the flange 1112 by the first side and the second side of the pressure block 413, and the downward force on the first side is less than the downward force on the second side. The first side of the pressure block 413 is the side close to the vertical rod 411; the second side of the pressure block 413 is the side close to the counterweight unit 42. Counterweight unit 42. Through this judgment, it can be determined whether the target height needs to be adjusted so that the crossbar 412 tends to be horizontal, and it is necessary to ensure that the adjustment operation is performed at the appropriate time to avoid unnecessary adjustments affecting the test results. At the same time, through pre-adjustment, the force in the resistance force area between the pressure block 413 and the flange 1112 is evenly distributed, thereby improving the accuracy of the test results.

[0060] Step S73, based on the number of detections reaching the first number, adjust the target height value according to the number of detections, and the target height is negatively correlated with the number of detections; adjusting the target height as the number of detections increases can adapt to subtle changes in the equipment caused by multiple uses, ensuring that the inner ring unit 11 is evenly stressed.

[0061] Step S74 , based on the detection device being in the initial state, the detected hub bearing 10 is removed from the support unit 31 ; this facilitates the rapid replacement of the hub bearing 10 to be detected and ensures the continuity of the detection process.

[0062] In step S75, based on the completion of the numerical adjustment of the target height, the next hub bearing 10 to be inspected is placed on the support unit 31, with the axis of the hub bearing 10 vertically oriented, the flange plate 1112 of the inner ring flange 111 of the hub bearing 10 facing upward, and the support unit 31 supported by the bottom end of the outer ring unit 12 of the hub bearing 10, i.e., step S10 is executed. This loops the inspection process, improves inspection efficiency, and ensures the orderly progress of batch inspections.

[0063] In 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 update of the number of detections, determine whether the number of detections reaches the second number; this judgment can determine whether the counterweight unit 42 needs to be adjusted to ensure the necessity and timeliness of the adjustment operation.

[0065] Step S82, based on the number of detections reaching the second number, adjust the position of the counterweight unit 42 and the model of the counterweight unit 42 according to the number of detections; the distance between the counterweight unit 42 and the vertical pole 411 is negatively correlated with the number of detections; the model includes weight; by adjusting the position and model of the counterweight unit 42, the first pressure applied to the inner ring unit 11 can be changed to adapt to the force changes of the equipment after multiple detections, and ensure that the inner ring unit 11 is evenly stressed.

[0066] Step S83, based on the completion of the adjustment of the counterweight unit 42, the next wheel hub bearing 10 to be inspected is placed on the support unit 31, so that the axis of the wheel hub bearing 10 is vertically arranged, and the support unit 31 is supported on the bottom end of the outer ring unit 12 of the wheel hub bearing 10; the inspection process is continued to ensure the stability and consistency of batch inspection.

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

[0068] Furthermore, based on the vertical rod 411 being at the target height, the horizontal rod 412 is controlled to rotate above the hub bearing 10 so that the pressing block 413 is pressed against the top of the inner ring unit 11 of the hub bearing 10. Under the action of the counterweight unit 42, the pressing block 413 applies a first downward pressure to the inner ring unit 11, i.e., step S32. Step S32 includes:

[0069] Step S321, based on the vertical pole 411 being at the target height, control the cross bar 412 to rotate around the first axis and the second axis until the cross bar 412 rotates to the top of the hub bearing 10, so that the pressure block 413 is pressed against the top of the inner ring unit 11 of the hub bearing 10, and under the action of the counterweight unit 42, the pressure block 413 applies a first downward pressure on the inner ring unit 11; wherein, the first axis and the second axis are perpendicular; the first axis is the axis of the vertical pole 411; the second axis is horizontally arranged; the cross bar 412 can flexibly adjust its own posture by rotating around mutually perpendicular axes, ensuring that the pressure block 413 can accurately align with and press the inner ring units 11 of different specifications, and ensure the stable application of the first pressure. This is the posture adjustment method of the cross bar 412.

[0070] Step S322, based on the displacement detector 61 abutting the top of the pressing assembly 40, the lifting assembly 50 is controlled to apply a first vertical upward 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 selectively applying 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 to avoid relative displacement of the inner ring flange 111 and the mating inner ring 112 due to non-crimping, thereby 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 the hub bearing 10 in any of the above embodiments. Figure 2 As shown, the detection device includes: a frame assembly 20, a positioning assembly 30, a pressing assembly 40, a lifting assembly 50, and a detection assembly 60. The frame assembly 20 is mainly used to support other components to facilitate the assembly of each component. Figure 2 、 Figure 4 As shown, the positioning assembly 30 includes a support unit 31 and a pressing unit 32. The support unit 31 is used to support the outer ring unit 12 of the hub bearing 10. The pressing unit 32 is used to press the outer ring unit 12 of the hub bearing 10. The support unit 31 and the pressing unit 32 are detachably connected to the frame assembly 20 respectively. 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 is used to provide a first downward pressure on the inner ring unit 11 of the hub bearing 10. As shown Figure 2 、 Figure 4 As shown, the jacking assembly 50 includes a jacking seat 51 and a jacking drive unit 52. The jacking seat 51 is connected to the jacking drive unit 52. The jacking drive unit 52 drives the jacking seat 51 to rise and fall. The jacking assembly 50 is used to provide a first upward thrust to the bottom end of the inner ring unit 11 of the hub bearing 10. The first thrust is greater than the first pressure. The jacking drive unit 52 is detachably connected to the frame assembly 20. The detection assembly 60 includes a displacement detector 61, and the displacement detector 61 is connected to the frame assembly 20. The position of the displacement detector 61 is adjustable. The division of labor of each component ensures the realization of functions such as support, fixation, pressure, and detection during the detection process. The detachable connection and position adjustable design facilitate the installation and maintenance of the equipment and adapt to the detection requirements of hub bearings 10 of different specifications, ensuring the feasibility and flexibility of the detection.

[0073] In other embodiments, Figure 4As shown, the hub bearing 10 includes an inner ring unit 11, an outer ring unit 12, rolling elements 13, and a retaining frame 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 inner ring body 1111 and a flange 1112 that are integrally formed. 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 fit. The outer ring unit 12 is sleeved on the inner ring body 1111 and the mating inner ring 112. Rolling elements 13 and retaining frame 14 are provided on the raceway between the outer ring unit 12 and the inner ring unit 11. As shown 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 is spaced apart from the frame assembly 20. Figure 4 As shown, a hole is reserved in the center of the support seat 311 so that the end of the hub bearing 10 away from the flange 1112 can pass through. A contoured groove is provided on the side of the support seat 311 close to the hub bearing 10 to facilitate the fitting and positioning of the outer ring unit 12 of the hub bearing 10. Figure 2 、 Figure 3 As shown, multiple clamping units 32 are arranged at intervals around the circumference of the support unit 31 to position and fix the hub bearing 10 at multiple points. The clamping unit 32 includes a clamping rod 321 and a clamping drive unit 322. The clamping drive unit 322 is used to provide a clamping force for the clamping rod 321. One end of the clamping rod 321 abuts against the side of the outer ring unit 12 of the hub bearing 10 away from the support seat 311. Figure 2 、 Figure 3 As shown, the detection assembly 60 further 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 for easy detection.

[0074] In other embodiments, Figure 2 、 Figure 4 As shown, the lifting assembly 50 also includes a first curved surface 53 and a second curved surface 54. The side of the lifting seat 51 close to the lifting drive part 52 is concave in the direction away from the lifting drive part 52 to form the first curved surface 53. The side of the lifting drive part 52 close to the lifting seat 51 is convex in the direction close to the lifting seat 51 to form the second curved surface 54. The radius of the first curved surface 53 is greater than the radius of the second curved surface 54. Through the above-mentioned curved surface setting, the lifting seat 51 can be automatically leveled when it abuts against the wheel hub bearing 10, which is convenient for applying thrust to the inner ring unit 11. A contoured groove can be formed on the side of the lifting seat 51 close to the inner ring unit 11 so as to abut against the inner ring body 1111 and the mating inner ring 112 at the same time, so as to avoid the inner ring body 1111 being subjected to a single force and causing it to be displaced from the mating inner ring 112. As shown Figure 2、 Figure 3 As shown, the hold-down assembly 40 further includes a bridge unit 43. One end of the bridge 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 testing for positive clearance, the end of the crossbar 412 away from the vertical rod 411 is suspended in the air. When the wheel hub bearing 10 is removed from the testing device, the end of the crossbar 412 away from the vertical rod 411 can be swung and adjusted to rest on the bridge unit 43, preventing the crossbar 412 from being suspended for an extended period of time, which could cause the counterweight unit 42 to bend the crossbar 412.

[0075] Furthermore, if Figure 2 、 Figure 3 As shown, the connecting rod unit 41 includes a vertical rod 411, a horizontal rod 412 and a pressure block 413. The vertical rod 411 is arranged vertically. The vertical rod 411 is rotatably connected to the frame assembly 20. The axis of the vertical rod 411 is the 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 the second axis. The second axis is arranged horizontally. The counterweight unit 42 is connected to the horizontal rod 412. The pressure block 413 is rotatably connected to the horizontal rod 412 around the third axis. The third axis is parallel to the second axis. The multi-axis rotation connection and height-adjustable design enable the posture and position of the connecting rod unit 41 to be flexibly adjusted, ensuring that the pressure block 413 can accurately dock with the inner ring unit 11 and ensure the effective application of the first pressure.

[0076] Furthermore, if 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. This distance design utilizes the principle of leverage, allowing a relatively small counterweight unit 42 to generate the required first pressure, reducing the weight requirement for the counterweight unit 42 and lowering costs. The adjustable distance allows for flexible adjustment of the pressure level to meet the pressure requirements of different testing scenarios.

[0077] Those skilled in the art will understand that the above-mentioned embodiments are specific examples for implementing the present disclosure, and in actual applications, various changes may be made thereto in form and details without departing from the scope of the present disclosure.

Claims

1. A method for detecting positive clearance of a hub bearing, characterized in that: The hub bearing positive clearance detection method comprises: Placing the hub bearing on the support unit so that the axis of the hub bearing is arranged vertically, the flange plate of the inner ring flange of the hub bearing is arranged upward, and the support unit is supported on the bottom end of the outer ring unit of the hub bearing; Based on the hub bearing being located on the support unit, controlling the pressing unit to press the outer ring unit downward and fix it; Upon completion of the fixing of the outer ring unit, the pressing assembly is controlled to apply a first downward pressure to the inner ring unit of the hub bearing; wherein, when the pressing assembly applies the first pressure to the inner ring unit, the pressing assembly has an upward margin of movement; the inner ring unit comprises the inner ring flange and a mating inner ring; the inner ring flange comprises an integrally formed inner ring body and the flange plate; the inner ring body and the mating inner ring are interference fit; Based on the pressing component applying the first pressure to the inner ring unit, controlling the displacement detector to abut against the top of the pressing component; Based on the displacement detector abutting against the top of the pressing assembly, controlling the lifting assembly to apply a first vertically upward thrust to the bottom end of the inner ring unit; wherein the first thrust is greater than the first pressure; Based on the first thrust applied by the lifting assembly to the inner ring unit, the upward movement distance of the inner ring unit detected by the displacement detector is obtained, and the detection is completed.

2. A method for detecting positive clearance of a hub bearing according to claim 1, characterized in that: The controlling the pressing assembly to apply a first downward pressure to the inner ring unit of the hub bearing based on the outer ring unit being fixed comprises: Based on the outer ring unit being fixed, the control pole is adjusted to the target height; Based on the vertical pole being at the target height, the cross bar is controlled to rotate above the hub bearing so that the pressure block is pressed against the top of the inner ring unit of the hub bearing. Under the action of the counterweight unit, the pressure block applies a first downward pressure to the inner ring unit.

3. A method for detecting positive clearance of a hub bearing according to claim 2, characterized in that: The hub bearing positive clearance detection method further comprises: Upon completion of the detection, the detection device is reset to an initial state, and the detection number is incremented by 1 to update the detection number; wherein, in the initial state, the lifting assembly, the pressing unit, and the pressing assembly are all detached from the wheel hub bearing, and the displacement detector is detached from the pressing assembly; Based on the completion of the update of the detection number, determining whether the detection number has reached the first number; Based on the number of detections reaching the first number, adjusting the value of the target height according to the number of detections, wherein the target height is negatively correlated with the number of detections; Based on the detection device being in the initial state, removing the detected hub bearing from the support unit; Based on the completion of the numerical adjustment of the target height, the next hub bearing to be tested is placed on the support unit and the step of placing the hub bearing on the support unit is returned to execute so that the axis of the hub bearing is vertically arranged, the flange plate of the inner ring flange of the hub bearing is arranged upward, and the support unit is supported on the bottom end of the outer ring unit of the hub bearing.

4. A method for detecting positive clearance of a hub bearing according to claim 3, characterized in that: The hub bearing positive clearance detection method further comprises: Based on the completion of the update of the number of detections, determining whether the number of detections reaches a second number; Based on the number of detections reaching the second number, adjusting the position of the counterweight unit and the model of the counterweight unit according to the number of detections; the distance between the counterweight unit and the vertical pole is negatively correlated with the number of detections; the model includes weight; Based on the completion of the adjustment of the counterweight unit, the next wheel hub bearing to be tested is placed on the support unit, and the step of placing the wheel hub bearing on the support unit is returned to execute so that the axis of the wheel hub bearing is vertically arranged, the flange plate of the inner ring flange of the wheel hub bearing is arranged upward, and the support unit is supported on the bottom end of the outer ring unit of the wheel hub bearing.

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

6. A method for detecting positive clearance of a hub bearing according to claim 2, characterized in that: The method comprises: based on the vertical rod being located at the target height, controlling the cross bar to rotate to above the hub bearing so that the pressure block is pressed 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 first downward pressure to the inner ring unit, including: Based on the vertical pole being at the target height, the cross bar is controlled to rotate around the first axis and the second axis until the cross bar rotates to the top of the wheel hub bearing, so that the pressure block is pressed 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 first downward pressure to the inner ring unit; wherein, the first axis and the second axis are perpendicular; the first axis is the axis of the vertical pole; and the second axis is horizontally arranged.

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

8. A detection device, applied to the hub bearing positive clearance detection method according to any one of claims 1 to 7, characterized in that: The detection device comprises: Rack components; A positioning assembly, the positioning assembly comprising a supporting unit and a pressing unit; the supporting unit is used to support the outer ring unit of the hub bearing; the pressing unit is used to press the outer ring unit of the hub bearing; the supporting unit and the pressing unit are respectively detachably connected to the frame assembly; A downward pressing assembly, comprising a connecting rod unit and a counterweight unit; the connecting rod unit is movably connected to the frame assembly; the position of the connecting rod unit is adjustable; the counterweight unit is connected to the connecting rod unit; the downward pressing assembly is used to provide a first downward pressure on the inner ring unit of the hub bearing; A jacking assembly, comprising a jacking seat and a jacking drive unit; the jacking seat is connected to the jacking drive unit; the jacking drive unit drives the jacking seat to move up and down; the jacking assembly is used to provide a first upward thrust to the bottom end of the inner ring unit of the hub bearing; the first thrust is greater than the first pressure; the jacking drive unit is detachably connected to the frame assembly; The detection component includes a displacement detector, which is connected to the frame component; the position of the displacement detector is adjustable.

9. A detection device according to claim 8, characterized in that: The connecting rod unit includes a vertical rod, a cross rod and a pressure block; the vertical rod is vertically arranged; the vertical rod is rotatably connected to the frame assembly; the axis of the vertical rod is a first axis; the vertical rod rotates around the first axis; the height of the vertical rod is adjustable; the cross rod and the vertical rod are rotatably connected around a second axis; the second axis is horizontally arranged; the counterweight unit is connected to the cross rod; the pressure block is rotatably connected to the cross rod 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; and the distance between the counterweight unit and the second axis is adjustable.

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