A wheel hub bearing clearance detection system and method

Abstract

The present invention relates to the technical field of wheel hub bearing detection, and in particular, to a wheel hub bearing clearance detection system and method. The bearing assembly includes an inner ring unit, an outer ring unit, and a rolling unit. The detection assembly includes a supporting unit, a driving unit, and a connecting rod unit. The driving unit includes a driving seat and an elastic part. The driving seat and the supporting unit are spaced apart. The driving seat and the elastic part are detachably connected. The connecting rod unit includes a sleeve, a support rod, and a rotating rod. The rotating rod includes an abutting part, a transmission part, and a gasket part. The wheel hub bearing clearance detection system includes a first press-fit state and a second press-fit state. The first press-fit state includes an end of the gasket part away from the transmission part abutting against the inner wall of the first inner ring. The second press-fit state includes the gasket part being inserted into the abutment between the first inner ring and the second inner ring. In this way, the problem of difficulty in detecting the clearance of the wheel hub bearing is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of wheel hub bearing detection, and in particular to a wheel hub bearing clearance detection system and method. Background Art

[0002] With the development of science and technology, wheel hub bearings are increasingly used. Wheel hub bearings are one of the key components of automobiles. They bear the load and rotation of the vehicle. During the driving process of the car, the wheel hub bearing not only bears axial and radial loads, but also provides precise motion guidance during high-speed rotation. The performance of wheel hub bearings directly affects the comfort, safety and reliability of the vehicle.

[0003] Hub bearing clearance is the relative movement between the inner ring unit and the outer ring unit of the bearing in the axial and radial directions, and is one of the important parameters for measuring hub bearing performance. The size of hub bearing clearance directly affects the performance of hub bearings. Too small hub bearing clearance will lead to overheating, increased wear, and even damage to hub bearings; too large hub bearing clearance will cause hub bearings to lose rigidity, affecting the vehicle's handling performance and stability. Therefore, accurate detection and control of hub unit clearance is of great significance to ensure the efficiency and reliability of the vehicle's transmission system. Summary of the invention

[0004] In order to solve the problem of difficulty in detecting the clearance of a wheel hub bearing, the present invention provides a system and method for detecting the clearance of a wheel hub bearing.

[0005] In a first aspect, the present invention provides a wheel hub bearing clearance detection system, the wheel hub bearing clearance detection system comprising:

[0006] A bearing assembly, the bearing assembly comprising an inner ring unit, an outer ring unit, and a rolling unit; the outer ring unit is sleeved on the inner ring unit; the inner ring unit and the outer ring unit are spaced apart; the inner ring unit is rotatably connected with the outer ring unit through the rolling unit; the inner ring unit comprises a first inner ring and a second inner ring; one end of the first inner ring abuts against one end of the second inner ring;

[0007] A detection component, the detection component includes a supporting unit, a driving unit, and a connecting rod unit; the driving unit includes a driving seat and an elastic part; the driving seat and the supporting unit are spaced apart; the driving seat and the elastic part are detachably connected; the connecting rod unit includes a sleeve, a support rod, and a rotating rod; one end of the support rod is detachably connected to the elastic part, and the other end extends in a direction close to the supporting unit; the outer peripheral wall of the sleeve abuts against the inner peripheral wall of the inner ring unit; the inner peripheral wall of the sleeve abuts against the outer peripheral wall of the support rod; the rotating rod is symmetrically arranged On both sides of the support rod; the rotating rod includes an abutment portion, a transmission portion, and a gasket portion; one end of the abutment portion is fixedly connected to the transmission portion, and the other end is drivingly connected to an end of the support rod close to the supporting unit; one end of the transmission portion close to the abutment portion is rotatably connected to the inner wall of the sleeve, and the other end passes through the internal cavity of the sleeve and extends toward the direction close to the driving seat to the external space of the sleeve; one end of the gasket portion is rotatably connected to an end of the transmission portion close to the driving seat, and the other end extends toward the direction close to the inner wall of the first inner ring;

[0008] The wheel hub bearing clearance detection system includes a first press-fit state and a second press-fit state; the first press-fit state includes the end of the gasket part away from the transmission part abutting against the inner wall of the first inner ring; the second press-fit state includes the gasket part being inserted into the abutment between the first inner ring and the second inner ring.

[0009] In some embodiments, a plurality of the rotating rods are evenly spaced along the circumference of the supporting rod and are disposed in the hollow cavity of the inner ring unit.

[0010] In some embodiments, the length dimensions of the plurality of gasket portions in the radial direction of the support rod gradually increase along the circumference of the support rod.

[0011] In some embodiments, the sleeve includes a cylinder body, a sliding cavity, an installation cavity, and a mounting hole; a sliding cavity with openings at both ends is formed in the cylinder body; part of the outer peripheral wall of the support rod abuts against the inner wall of the sliding cavity; the installation cavity with openings at both ends is formed in the cylinder body; the installation cavities are arranged at intervals along the circumference of the sliding cavity; the installation cavity is connected to the sliding cavity; one rotating rod is arranged in one installation cavity; the installation hole is arranged on the inner wall of one end of the installation cavity close to the supporting unit; one end of the transmission part close to the abutting part is rotatably connected to the inner wall of the cylinder body through the installation hole.

[0012] In some embodiments, the support rod includes a rod body and a slide groove; one end of the rod body is detachably connected to the elastic part, and the other end extends through the sliding cavity toward the supporting unit; the slide groove is arranged on the outer peripheral wall adjacent to one end of the rod body close to the supporting unit; the slide groove is recessed in the direction close to the central axis of the rod body; the side wall of the slide groove close to the supporting unit is slidably connected to the abutment part; the first press-fit state also includes the part of the outer peripheral wall of the rod body in the sliding cavity abutting against one side of the transmission part.

[0013] In some embodiments, the supporting unit includes a base and a steel ball; the base abuts against the end of the second inner ring away from the first inner ring; part of the steel ball is embedded in the base close to the second inner ring; the steel ball and the support rod are on the same central axis; the second press-fit state also includes one end of the support rod close to the base abutting against the steel ball.

[0014] In a second aspect, the present invention provides a hub bearing clearance detection method, which can be applied to the hub bearing clearance detection system of any embodiment of the first aspect, and the hub bearing clearance detection method comprises:

[0015] Step S10, based on the clearance detection requirement of the bearing assembly, driving the hub bearing clearance detection system to enter the first press-fitting state;

[0016] Step S20, based on the first press-fitting state, driving the connecting rod unit to move to a first set position in a direction close to the supporting unit; wherein the first set position includes an end of the gasket portion away from the transmission portion abutting against an inner wall of an end of the first inner ring adjacent to the second inner ring;

[0017] Step S30, based on the connecting rod unit moving to the first set position, driving the hub bearing clearance detection system to switch to the second press-fit state;

[0018] Step S40: acquiring a negative clearance value of the bearing assembly based on the second press-fit state.

[0019] In some embodiments, step S30 includes:

[0020] Step S31, based on the connecting rod unit moving to the first set position, the driving seat moves toward the first inner ring until it abuts against the first inner ring, and drives the connecting rod unit to rotate circumferentially along the central axis of the support rod to a first set time;

[0021] Step S32, based on the drive seat abutting against the first inner ring and driving the connecting rod unit to rotate at a set speed along the circumferential direction of the central axis of the support rod for a set time, the wheel hub bearing clearance detection system switches to the second press-fit state; wherein, the second press-fit state also includes compression deformation of the elastic part, and the outer circumferential wall of the sleeve abuts against the inner circumferential wall of the second inner ring.

[0022] In some embodiments, step S40 includes:

[0023] Step S401, based on the second press-fitting state, obtaining a standard thickness value and a first angle value of the gasket portion; wherein the first angle value is an angle between the gasket portion and an inner wall of the outer ring unit close to the first inner ring;

[0024] Step S402, based on the completion of obtaining the standard thickness value and the first angle value of the gasket portion, obtaining the first initial position of the first inner ring; wherein the first initial position is the position of the first inner ring in the second press-fit state;

[0025] Step S403, based on the first initial position, fixing the outer ring unit and driving the hub bearing clearance detection system to run a first detection state; wherein the first detection state includes driving the detection assembly, the inner ring unit and the rolling unit to move along the central axis of the connecting rod unit in a first direction to a second set position with a first pressure value; wherein the second set position includes one side of the first rolling body of the rolling unit abutting against the first inner ring, and the other side abutting against the inner wall of the outer ring unit;

[0026] Step S404, based on the detection component, the inner ring unit and the rolling unit moving to the second set position, driving the inner ring unit to rotate relative to the outer ring unit to a second set time;

[0027] Step S405, based on the inner ring unit rotating relative to the outer ring unit to a second set time, obtaining a first average position of the first inner ring; wherein the first average position is an average position of a plurality of positions of the first inner ring in the first detection state;

[0028] Step S406, obtaining the negative clearance value of the bearing assembly based on the first initial position, the first average position, the standard thickness value of the gasket portion, and the first angle value.

[0029] In some embodiments, the step S40 further includes:

[0030] Step S411, based on the second press-fitting state, obtaining a standard thickness value, a first angle value, and a second angle value of the gasket portion; wherein the first angle value is an angle between the gasket portion and an inner wall of the outer ring unit close to the first inner ring; and the second angle value is an angle between the gasket portion and an inner wall of the outer ring unit close to the second inner ring;

[0031] Step S412, obtaining a first initial position of the first inner ring based on the standard thickness value of the gasket portion and the first angle value being obtained;

[0032] Step S413, based on the first initial position, fixing the outer ring unit and driving the hub bearing clearance detection system to run a first detection state; wherein the first detection state includes driving the detection assembly, the inner ring unit and the rolling unit to move along the central axis of the connecting rod unit in a first direction to a second set position with a first pressure value; the second set position includes one side of the first rolling body of the rolling unit abutting against the first inner ring, and the other side abutting against the inner wall of the outer ring unit;

[0033] Step S414, based on fixing the outer ring unit and driving the hub bearing clearance detection system to run the first detection state, the standard thickness value of the gasket part, and the second angle value are obtained, and the second initial position of the second inner ring is obtained;

[0034] Step S415, based on fixing the outer ring unit and driving the hub bearing clearance detection system to run a first detection state and obtaining a second initial position of the second inner ring, driving the inner ring unit to rotate relative to the outer ring unit for a second set time and then stopping the rotation;

[0035] Step S416, based on the inner ring unit rotating relative to the outer ring unit for a first set time and then stopping, obtaining a first average position of the first inner ring and switching the hub bearing clearance detection system to a second detection state; wherein the second detection state includes driving the detection assembly, the inner ring unit and the rolling unit to move along the central axis of the connecting rod unit in a second direction to a third set position by the first pressure value; the first direction is opposite to the second direction; the third set position includes one side of the second rolling body of the rolling unit abutting against the second inner ring, and the other side abutting against the inner wall of the outer ring unit;

[0036] Step S417, based on the hub bearing clearance detection system switching to the second detection state, driving the inner ring unit to rotate relative to the outer ring unit for a third set time and then stopping the rotation;

[0037] Step S418, obtaining a second average position of the second inner ring based on the inner ring unit rotating relative to the outer ring unit for the third set time and then stopping rotating;

[0038] Step S419, obtaining the negative clearance value of the bearing assembly based on the first initial position, the first average position, the second initial position, the second average position, the standard thickness value of the gasket portion, the first angle value, and the second angle value.

[0039] In order to solve the problem of difficulty in detecting the clearance of the hub bearing, the present invention has the following advantages:

[0040] When the wheel hub bearing clearance detection system is in the second press-fit state, the gasket portion is inserted into the abutment between the first inner ring and the second inner ring, so that the first inner ring and the second inner ring move along the center line in the direction away from the gasket portion, thereby increasing the relative distance between the inner ring unit and the outer ring unit, thereby converting the negative clearance of the wheel hub bearing into a positive clearance, causing the inner ring unit and the outer ring unit to generate movement when subjected to force. By obtaining the difference between the movement generated by the inner ring unit and the outer ring unit when subjected to force and the thickness of the gasket portion, the negative clearance of the wheel hub bearing can be detected. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A schematic diagram of a wheel hub bearing clearance detection system according to an embodiment is shown;

[0042] Figure 2 A schematic diagram of a wheel hub bearing clearance detection system according to another embodiment is shown;

[0043] Figure 3 A partial schematic diagram of a wheel hub bearing clearance detection system according to an embodiment is shown.

[0044] Figure markings: 01 bearing assembly; 11 inner ring unit; 111 first inner ring; 112 second inner ring; 12 outer ring unit; 13 rolling unit; 131 retaining frame; 132 first rolling element; 133 second rolling element; 02 detection assembly; 21 supporting unit; 211 base; 212 steel ball; 22 driving unit; 221 driving seat; 222 elastic part; 23 connecting rod unit; 231 sleeve; 2311 cylinder; 2312 sliding cavity; 2313 mounting cavity; 2314 mounting hole; 2315 avoidance groove; 232 support rod; 2321 rod body; 2322 slide groove; 233 rotating rod; 2331 abutment part; 2332 transmission part; 2333 gasket part. DETAILED DESCRIPTION

[0045] 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, rather than implying any limitation on the scope of the present disclosure.

[0046] As used herein, the term "including" and its variants are to be interpreted as open 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". The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like is based on the orientation or position relationship shown in the drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated system, element or component to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to being used to indicate an orientation or position relationship, some of the above terms may also be used to indicate other meanings, such as the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances. In addition, the terms "install", "set", "provided with", "connected", and "connected" should be understood in a broad sense. 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 directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two systems, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different systems, 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 and quantity of the indicated systems, elements or components. Unless otherwise specified, "plurality" means two or more.

[0047] The wheel hub bearing is one of the key parts of the automobile, and its performance directly affects the comfort, safety and reliability of the vehicle. The size of the wheel hub bearing clearance directly affects the performance of the wheel hub bearing. When the clearance of the bearing assembly 01 is negative, the bearing assembly 01 cannot work normally and may even cause the wheel hub bearing to deform. This embodiment discloses a wheel hub bearing clearance detection system, which may include a bearing assembly 01 and a detection assembly 02.

[0048] The bearing assembly 01 may include an inner ring unit 11, an outer ring unit 12, and a rolling unit 13. The outer ring unit 12 may be sleeved on the inner ring unit 11. The inner ring unit 11 may be rotatably connected to the outer ring unit 12 through the rolling unit 13, so that relative rolling may occur between the inner ring unit 11 and the outer ring unit 12. The inner ring unit 11 may include a first inner ring 111 and a second inner ring 112. One end of the first inner ring 111 may abut against one end of the second inner ring 112. The design of the first inner ring 111 and the second inner ring 112 enables the bearing assembly 01 to better distribute the load and enhance the axial load-bearing capacity of the bearing assembly 01.

[0049] The detection assembly 02 may include a supporting unit 21, a driving unit 22, and a connecting rod unit 23. The driving unit 22 may include a driving part and an elastic part 222. The driving seat 221 may be spaced apart from the supporting unit 21. The driving seat 221 is detachably connected to the elastic part 222. The connecting rod unit 23 may include a sleeve 231, a support rod 232, and a rotating rod 233. One end of the support rod 232 is detachably connected to the elastic part 222, and the other end may extend in a direction close to the supporting unit 21. The outer peripheral wall of the sleeve 231 may abut against the inner peripheral wall of the inner ring unit 11. The inner peripheral wall of the sleeve 231 may abut against the outer peripheral wall of the support rod 232. The rotating rod 233 may be symmetrically arranged on both sides of the support rod 232. The rotating rod 233 may include an abutting part 2331, a transmission part 2332, and a gasket part 2333. One end of the abutment portion 2331 can be fixedly connected to the transmission portion 2332, and the other end can be drivingly connected to the end of the support rod 232 close to the supporting unit 21. One end of the transmission portion 2332 close to the abutment portion 2331 can be rotatably connected to the inner wall of the sleeve 231, and the other end passes through the internal cavity of the sleeve 231 and extends to the external space of the sleeve 231 in the direction close to the driving seat 221. One end of the gasket portion 2333 can be rotatably connected to the end of the transmission portion 2332 close to the driving seat 221, and the other end extends in the direction close to the inner wall of the first inner ring 111.

[0050] The wheel hub bearing clearance detection system may include a first press-fit state and a second press-fit state. Figure 1 As shown, the first press-fitting state may include that one end of the gasket portion 2333 away from the transmission portion 2332 abuts against the inner wall of the first inner ring 111, so that the driving unit 22 can drive the sliding groove 2322 of the connecting rod unit 23 to move toward the supporting unit 21, preparing for the hub bearing clearance detection. Figure 2As shown, the second press-fitting state may include the gasket portion 2333 being inserted into the abutment between the first inner ring 111 and the second inner ring 112. By inserting the gasket portion 2333 into the abutment between the first inner ring 111 and the second inner ring 112, the first inner ring 111 and the second inner ring 112 are moved along the center line in a direction away from the gasket portion 2333, thereby increasing the relative distance between the inner ring unit 11 and the outer ring unit 12, thereby converting the negative clearance of the wheel hub bearing into a positive clearance, so that the inner ring unit 11 and the outer ring unit 12 can generate a movement amount when subjected to force, and by obtaining the difference between the movement amount generated by the inner ring unit 11 and the outer ring unit 12 when subjected to force and the thickness of the gasket portion 2333, the negative clearance size of the wheel hub bearing can be detected.

[0051] In this embodiment, if Figure 3 As shown, the connecting rod unit 23 may include a plurality of rotating rods 233. The plurality of rotating rods 233 may be evenly arranged in the hollow cavity of the inner ring unit 11 along the circumferential intervals of the support rod 232. The plurality of rotating rods 233 may abut against the inner ring unit 11 along the circumferential intervals, respectively, to prevent the inner ring unit 11 from being squeezed by the rotating rods 233 abutting against the inner ring unit 11, resulting in uneven force, thereby causing the inner ring to tilt.

[0052] In this embodiment, the lengths of the plurality of gasket portions 2333 in the radial direction of the support rod 232 can be gradually increased along the circumferential direction of the support rod 232, so that the gasket portions 2333 can be gradually rotated and inserted into the abutment between the first inner ring 111 and the second inner ring 112 according to the different lengths of the gasket portions 2333, so that the gasket portions 2333 can be more easily rotated and inserted into the abutment between the first inner ring 111 and the second inner ring 112. In other embodiments, the gasket portions 2333 can be in different shapes, such as a fan shape, a trapezoidal shape, etc., so that the gasket portions 2333 can be more easily rotated and inserted into the abutment between the first inner ring 111 and the second inner ring 112.

[0053] In this embodiment, the sleeve 231 may include a cylinder 2311, a sliding cavity 2312, a mounting cavity 2313, and a mounting hole 2314. A sliding cavity 2312 with openings at both ends may be formed in the cylinder 2311. Part of the outer peripheral wall of the support rod 232 may abut against the inner wall of the sliding cavity 2312, so that a mounting cavity 2313 with openings at both ends is formed in the cylinder 2311. The mounting cavities 2313 may be arranged at intervals along the circumference of the sliding cavity 2312. The mounting cavity 2313 may be connected to the sliding cavity 2312. A rotating rod 233 may be arranged in a mounting cavity 2313 to support the inner wall of the inner ring unit 11, and also to facilitate the gasket portion 2333 to rotate and plug into the abutment between the first inner ring 111 and the second inner ring 112. The mounting hole 2314 can be arranged on the inner wall of one end of the mounting cavity 2313 close to the supporting unit 21, and one end of the transmission part 2332 close to the abutting part 2331 can be rotatably connected with the inner wall of the cylinder 2311 through the mounting hole 2314, so that the gasket part 2333 on the rotating rod 233 can change the relative position of the gasket part 2333 and the inner ring unit 11 in the radial direction through the rotation of the mounting hole 2314, so that the gasket part 2333 can be rotated and inserted into the abutment between the first inner ring 111 and the second inner ring 112. In other embodiments, the sleeve 231 can also include an avoidance groove 2315, and the avoidance groove 2315 can be arranged at one end of the cylinder 2311 away from the central axis and close to the gasket part 2333, so that when the rotating rod 233 rotates in the direction close to the base 211, a certain avoidance space can be given to the gasket part 2333, so that the rotating rod 233 can rotate more smoothly.

[0054] In this embodiment, the support rod 232 may include a rod body 2321 and a slide groove 2322. One end of the rod body 2321 is detachably connected to the elastic part 222, and the other end may extend through the sliding cavity 2312 toward the direction close to the supporting unit 21. The slide groove 2322 may be arranged on the peripheral wall adjacent to the end of the rod body 2321 close to the supporting unit 21. The slide groove 2322 may be recessed toward the direction close to the central axis of the rod body 2321. The side wall of the slide groove 2322 close to the supporting unit 21 may be slidably connected to the abutment part 2331. The first press-fit state may also include that a part of the peripheral wall of the rod body 2321 in the sliding cavity 2312 abuts against one side of the transmission part 2332. The support rod 232 may drive the transmission part 2332 to rotate toward the direction close to the base 211 through the abutment part 2331, thereby allowing the rotating rod 233 to rotate.

[0055] In this embodiment, the supporting unit 21 may include a base 211 and a steel ball 212. The base 211 abuts against the end of the second inner ring 112 away from the first inner ring 111. Part of the steel ball 212 is embedded in the side of the base 211 close to the second inner ring 112. The steel ball 212 and the support rod 232 may be on the same central axis. The second press-fitting state may also include an end of the support rod 232 close to the base 211 abutting against the steel ball 212. By embedding the steel ball 212 on the base 211, the friction between the base 211 and the support rod 232 can be reduced, which facilitates the rotation of the support rod 232 in the second press-fitting state, and then the gasket portion 2333 can be rotated and inserted into the abutment between the first inner ring 111 and the second inner ring 112.

[0056] This embodiment discloses a wheel hub bearing clearance detection method, which can be applied to any wheel hub bearing clearance detection system in the above embodiments. The wheel hub bearing clearance detection method may include:

[0057] Step S10, based on the clearance detection requirement of the bearing assembly 01, the wheel hub bearing clearance detection system can be driven to enter the first press-fit state.

[0058] In step S20, based on the first press-fit state, the connecting rod unit 23 can be driven to move to the first set position in the direction close to the supporting unit 21; wherein, the first set position may include an end of the gasket portion 2333 away from the transmission portion 2332 abutting against the inner wall of an end of the first inner ring 111 adjacent to the second inner ring 112, so that the driving unit 22 can drive the connecting rod unit 23 slide groove 2322 to move in the direction close to the supporting unit 21, in preparation for the detection of the hub bearing clearance.

[0059] Step S30: Based on the connecting rod unit 23 moving to the first set position, the wheel hub bearing clearance detection system can be driven to switch to the second press-fitting state, and the second press-fitting state can include the shim portion 2333 being inserted into the abutment between the first inner ring 111 and the second inner ring 112. By inserting the shim portion 2333 into the abutment between the first inner ring 111 and the second inner ring 112, the first inner ring 111 and the second inner ring 112 are moved along the center line in a direction away from the shim portion 2333, thereby increasing the relative distance between the inner ring unit 11 and the outer ring unit 12, so that the negative clearance of the wheel hub bearing is converted into a positive clearance.

[0060] Step S40, based on the second press-fit state, the negative clearance value of the bearing assembly 01 can be obtained. By converting the negative clearance of the hub bearing into positive clearance, the inner ring unit 11 and the outer ring unit 12 can generate movement when subjected to force, thereby detecting the clearance size of the hub bearing.

[0061] In this embodiment, step S30 may include step S31 and step S32, and each step is described in detail as follows:

[0062] In step S31, based on the connecting rod unit 23 moving to the first set position, the driving seat 221 can move toward the direction close to the first inner ring 111 until it abuts against the first inner ring 111, and drive the connecting rod unit 23 to rotate circumferentially along the central axis of the support rod 232 to the first set time. By driving the connecting rod unit 23 to rotate circumferentially along the central axis of the support rod 232, the gasket can maintain a certain inertia, which facilitates the rotation of the gasket part 2333 into the abutment between the first inner ring 111 and the second inner ring 112.

[0063] Step S32, based on the driving seat 221 abutting against the first inner ring 111 and driving the connecting rod unit 23 to rotate at a set speed for a set time along the circumferential direction of the central axis of the support rod 232, the wheel hub bearing clearance detection system can be switched to the second press-fit state; wherein the second press-fit state also includes the elastic part 222 being compressed and deformed, and the outer peripheral wall of the sleeve 231 abutting against the inner peripheral wall of the second inner ring 112. By inserting the gasket part 2333 into the abutment between the first inner ring 111 and the second inner ring 112, the first inner ring 111 and the second inner ring 112 are moved along the center line in a direction away from the gasket part 2333, thereby increasing the relative distance between the inner ring unit 11 and the outer ring unit 12, so that the negative clearance of the wheel hub bearing is converted into a positive clearance, which is convenient for subsequent measurement.

[0064] In this embodiment, step S40 may include step S401 to step S406, and each step is described in detail as follows:

[0065] Step S401, based on the second press-fitting state, obtain the standard thickness value and the first angle value of the gasket portion 2333. The first angle value may be the angle between the gasket portion 2333 and the inner wall of the outer ring unit 12 close to the first inner ring 111.

[0066] Step S402: Based on the standard thickness value and the first angle value of the gasket portion 2333, the first initial position of the first inner ring 111 can be obtained. The first initial position can be the position of the first inner ring 111 in the second press-fit state.

[0067] Step S403, based on the first initial position, the outer ring unit 12 can be fixed and the wheel hub bearing clearance detection system can be driven to run the first detection state. The first detection state can include driving the detection assembly 02, the inner ring unit 11 and the rolling unit 13 to move to the second set position in the first direction along the central axis of the connecting rod unit 23 with a first pressure value. The second set position can include one side of the first rolling body 132 of the rolling unit 13 abutting against the first inner ring 111 and the other side abutting against the inner wall of the outer ring unit 12. By applying the first pressure value, one side of the first rolling body 132 of the rolling unit 13 can be abutted against the first inner ring 111 and the other side can be abutted against the inner wall of the outer ring unit 12.

[0068] Step S404, based on the detection component 02, the inner ring unit 11 and the rolling unit 13 moving to the second set position, the connecting rod unit 23 is driven to rotate relative to the outer ring unit 12 to the second set time, so that the connecting rod unit 23 can detect the position of the first inner ring 111 at different positions during rotation.

[0069] Step S405, based on the inner ring unit 11 rotating relative to the outer ring unit 12 to the second set time, obtain the first average position of the first inner ring 111. The first average position can be the average position of the first inner ring 111 at multiple positions in the first detection state. By detecting the average position of the first inner ring 111 at multiple positions in the first detection state, the error caused by the deformation of the bearing assembly 01 during measurement is reduced, and the accuracy of the data is increased.

[0070] Step S406, based on the first initial position, the first average position, the standard thickness value of the gasket portion 2333, and the first angle value, the negative clearance value of the hub bearing assembly 01 can be obtained. The positive clearance value of the first inner ring 111 in the second press-fit state can be obtained by subtracting the first average position from the first initial position. The negative clearance value of the hub bearing assembly 01 in the axial direction can be obtained by subtracting the standard thickness value of the gasket portion 2333 from the positive clearance value of the first inner ring 111 in the second press-fit state. The negative clearance value of the hub bearing assembly 01 in the radial direction can be obtained by using the negative clearance value of the hub bearing assembly 01 in the axial direction and the first angle value through trigonometric functions.

[0071] In this embodiment, step S40 may include step S411 to step S419, and each step is described in detail as follows:

[0072] Step S411, based on the second press-fitting state, the standard thickness value, the first angle value, and the second angle value of the gasket portion 2333 can be obtained. The first angle value is the angle between the gasket portion 2333 and the inner wall of the outer ring unit 12 close to the first inner ring 111. The second angle value is the angle between the gasket portion 2333 and the inner wall of the outer ring unit 12 close to the second inner ring 112.

[0073] Step S412, based on the standard thickness value and the first angle value of the gasket portion 2333 being obtained, the first initial position of the first inner ring 111 is obtained.

[0074] Step S413, based on the first initial position, fix the outer ring unit 12 and drive the wheel hub bearing clearance detection system to run the first detection state. The first detection state includes driving the detection assembly 02, the inner ring unit 11 and the rolling unit 13 to move to the second set position in the first direction along the central axis of the connecting rod unit 23 with a first pressure value. The second set position may include one side of the first rolling body 132 of the rolling unit 13 abutting against the first inner ring 111, and the other side abutting against the inner wall of the outer ring unit 12. By applying the first pressure value, one side of the first rolling body 132 of the rolling unit 13 can be abutted against the first inner ring 111, and the other side can be abutted against the inner wall of the outer ring unit 12.

[0075] Step S414, based on fixing the outer ring unit 12 and driving the hub bearing clearance detection system to run the first detection state, the standard thickness value of the gasket part 2333 and the second angle value are obtained, and the second initial position of the second inner ring 112 is obtained.

[0076] Step S415, based on fixing the outer ring unit 12 and driving the hub bearing clearance detection system to run the first detection state and obtain the second initial position of the second inner ring 112, the inner ring unit 11 is driven to rotate relative to the outer ring unit 12 for a second set time and then stops rotating.

[0077] Step S416, based on the inner ring unit 11 rotating relative to the outer ring unit 12 for a first set time and then stopping, the first average displacement of the first inner ring 111 can be obtained and the hub bearing clearance detection system is switched to the second detection state. The second detection state can include driving the detection component 02, the inner ring unit 11 and the rolling unit 13 to move to a third set position along the central axis of the connecting rod unit 23 in the second direction with a first pressure value. The first direction is opposite to the second direction. The third set position can include one side of the second rolling body 133 of the rolling unit 13 abutting against the second inner ring 112 and the other side abutting against the inner wall of the outer ring unit 12. In other embodiments, the rolling unit 13 can also include a retaining frame 131 so that the load can be evenly distributed on the first rolling body 132 and the second rolling body 133.

[0078] Step S417, based on the hub bearing clearance detection system switching to the second detection state, the inner ring unit 11 is driven to rotate relative to the outer ring unit 12 for a third set time and then stops rotating.

[0079] Step S418, based on the inner ring unit 11 rotating relative to the outer ring unit 12 for a third set time and then stopping, obtain the second average position of the second inner ring 112. The second average position is the average position of the second inner ring 112 at multiple positions in the second detection state. By detecting the average position of the second inner ring 112 at multiple positions in the second detection state, the error caused by the deformation of the bearing assembly 01 during measurement is reduced, and the accuracy of the data is increased.

[0080] Step S419, based on the first initial position, the first average position, the second initial position, the second average position, the standard thickness value of the gasket part 2333, the first angle value, and the second angle value, the negative clearance value of the bearing assembly 01 can be obtained. The positive clearance value of the first inner ring 111 in the second press-fit state can be obtained by subtracting the first average position from the first initial position. The negative clearance value of the hub bearing assembly 01 in the axial direction can be obtained by subtracting the standard thickness value of the gasket part 2333 from the positive clearance value of the first inner ring 111 in the second press-fit state. The negative clearance value of the hub bearing assembly 01 in the radial direction can be obtained by using the trigonometric function of the negative clearance value in the axial direction of the hub bearing assembly 01 and the first angle value. The positive clearance value of the second inner ring 112 in the second press-fit state can be obtained by subtracting the second average position from the second initial position. The negative clearance value of the hub bearing assembly 01 in the axial direction can be obtained by subtracting the standard thickness value of the gasket part 2333 from the positive clearance value of the second inner ring 112 in the second press-fit state. The negative clearance value in the radial direction of the hub bearing assembly 01 can be obtained by using the negative clearance value in the axial direction of the hub bearing assembly 01 and the second angle value through trigonometric function.

[0081] The final negative clearance value can be obtained by averaging the negative clearance value of the first inner ring 111 and the negative clearance value of the second inner ring 112 of the hub bearing assembly 01, thereby further increasing the accuracy of the result. In this way, the clearance detection of the hub bearing can be realized.

[0082] Those skilled in the art will appreciate 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 detail without departing from the spirit and scope of the present disclosure.

Claims

1. A wheel hub bearing clearance detection system, characterized in that: The hub bearing clearance detection system comprises: A bearing assembly, the bearing assembly comprising an inner ring unit, an outer ring unit, and a rolling unit; the outer ring unit is sleeved on the inner ring unit; the inner ring unit and the outer ring unit are spaced apart; the inner ring unit is rotatably connected with the outer ring unit through the rolling unit; the inner ring unit comprises a first inner ring and a second inner ring; one end of the first inner ring abuts against one end of the second inner ring; A detection component, the detection component includes a supporting unit, a driving unit, and a connecting rod unit; the driving unit includes a driving seat and an elastic part; the driving seat and the supporting unit are spaced apart; the driving seat and the elastic part are detachably connected; the connecting rod unit includes a sleeve, a support rod, and a rotating rod; one end of the support rod is detachably connected to the elastic part, and the other end extends in a direction close to the supporting unit; the outer peripheral wall of the sleeve abuts against the inner peripheral wall of the inner ring unit; the inner peripheral wall of the sleeve abuts against the outer peripheral wall of the support rod; the rotating rod is symmetrically arranged On both sides of the support rod; the rotating rod includes an abutment portion, a transmission portion, and a gasket portion; one end of the abutment portion is fixedly connected to the transmission portion, and the other end is drivingly connected to an end of the support rod close to the supporting unit; one end of the transmission portion close to the abutment portion is rotatably connected to the inner wall of the sleeve, and the other end passes through the internal cavity of the sleeve and extends toward the direction close to the driving seat to the external space of the sleeve; one end of the gasket portion is rotatably connected to an end of the transmission portion close to the driving seat, and the other end extends toward the direction close to the inner wall of the first inner ring; The wheel hub bearing clearance detection system includes a first press-fit state and a second press-fit state; the first press-fit state includes that one end of the gasket portion away from the transmission portion abuts against the inner wall of the first inner ring; the second press-fit state includes that the gasket portion is inserted into the abutment between the first inner ring and the second inner ring; A plurality of rotating rods are evenly arranged in the hollow cavity of the inner ring unit at intervals along the circumference of the supporting rod; The lengths of the plurality of gasket portions in the radial direction of the support rod gradually increase along the circumferential direction of the support rod; The sleeve comprises a cylinder body, a sliding cavity, a mounting cavity, and a mounting hole; a sliding cavity with openings at both ends is formed in the cylinder body; a part of the outer peripheral wall of the support rod abuts against the inner wall of the sliding cavity; the mounting cavity with openings at both ends is formed in the cylinder body; the mounting cavities are arranged at intervals along the circumference of the sliding cavity; the mounting cavity is communicated with the sliding cavity; one rotating rod is arranged in one mounting cavity; the mounting hole is arranged on the inner wall of one end of the mounting cavity close to the supporting unit; one end of the transmission part close to the abutting part is rotatably connected to the inner wall of the cylinder body through the mounting hole; The support rod includes a rod body and a slide groove; one end of the rod body is detachably connected to the elastic part, and the other end extends through the sliding cavity toward the supporting unit; the slide groove is arranged on the outer peripheral wall adjacent to the end of the rod body close to the supporting unit; the slide groove is recessed in the direction close to the central axis of the rod body; the side wall of the slide groove close to the supporting unit is slidably connected to the abutment part; the first press-fit state also includes the part of the outer peripheral wall of the rod body in the sliding cavity abutting against one side of the transmission part.

2. A wheel hub bearing clearance detection system according to claim 1, characterized in that: The supporting unit includes a base and a steel ball; the base abuts against the end of the second inner ring away from the first inner ring; part of the steel ball is embedded in the base close to the second inner ring; the steel ball and the support rod are on the same central axis; the second press-fit state also includes one end of the support rod close to the base abutting against the steel ball.

3. A wheel hub bearing clearance detection method, the wheel hub bearing clearance detection method is applied to a wheel hub bearing clearance detection system according to any one of claims 1-2, characterized in that: The wheel hub bearing clearance detection method comprises: Step S10, based on the clearance detection requirement of the bearing assembly, driving the hub bearing clearance detection system to enter the first press-fitting state; Step S20, based on the first press-fitting state, driving the connecting rod unit to move to a first set position in a direction close to the supporting unit; wherein the first set position includes an end of the gasket portion away from the transmission portion abutting against an inner wall of an end of the first inner ring adjacent to the second inner ring; Step S30, based on the connecting rod unit moving to the first set position, driving the hub bearing clearance detection system to switch to the second press-fit state; The step S30 comprises: Step S31, based on the connecting rod unit moving to the first set position, the driving seat moves toward the first inner ring until it abuts against the first inner ring, and drives the connecting rod unit to rotate circumferentially along the central axis of the support rod to a first set time; Step S32, based on the drive seat abutting against the first inner ring and driving the connecting rod unit to rotate at a set speed for a set time along the circumferential direction of the central axis of the support rod, the hub bearing clearance detection system switches to the second press-fit state; wherein the second press-fit state also includes compression deformation of the elastic part, and the outer peripheral wall of the sleeve abuts against the inner peripheral wall of the second inner ring; Step S40: acquiring a negative clearance value of the bearing assembly based on the second press-fit state.

4. A wheel hub bearing clearance detection method according to claim 3, characterized in that: The step S40 comprises: Step S401, based on the second press-fitting state, obtaining a standard thickness value and a first angle value of the gasket portion; wherein the first angle value is an angle between the gasket portion and an inner wall of the outer ring unit close to the first inner ring; Step S402, based on the completion of obtaining the standard thickness value and the first angle value of the gasket portion, obtaining the first initial position of the first inner ring; wherein the first initial position is the position of the first inner ring in the second press-fit state; Step S403, based on the first initial position, fixing the outer ring unit and driving the hub bearing clearance detection system to run a first detection state; wherein the first detection state includes driving the detection assembly, the inner ring unit and the rolling unit to move along the central axis of the connecting rod unit in a first direction to a second set position with a first pressure value; wherein the second set position includes one side of the first rolling body of the rolling unit abutting against the first inner ring, and the other side abutting against the inner wall of the outer ring unit; Step S404, based on the detection component, the inner ring unit and the rolling unit moving to the second set position, driving the inner ring unit to rotate relative to the outer ring unit to a second set time; Step S405, based on the inner ring unit rotating relative to the outer ring unit to a second set time, obtaining a first average position of the first inner ring; wherein the first average position is an average position of a plurality of positions of the first inner ring in the first detection state; Step S406, obtaining the negative clearance value of the bearing assembly based on the first initial position, the first average position, the standard thickness value of the gasket portion, and the first angle value.

5. A wheel hub bearing clearance detection method according to claim 3, characterized in that: The step S40 further includes: Step S411, based on the second press-fitting state, obtaining a standard thickness value, a first angle value, and a second angle value of the gasket portion; wherein the first angle value is an angle between the gasket portion and an inner wall of the outer ring unit close to the first inner ring; and the second angle value is an angle between the gasket portion and an inner wall of the outer ring unit close to the second inner ring; Step S412, obtaining a first initial position of the first inner ring based on the standard thickness value of the gasket portion and the first angle value being obtained; Step S413, based on the first initial position, fixing the outer ring unit and driving the hub bearing clearance detection system to run a first detection state; wherein the first detection state includes driving the detection assembly, the inner ring unit and the rolling unit to move along the central axis of the connecting rod unit in a first direction to a second set position with a first pressure value; the second set position includes one side of the first rolling body of the rolling unit abutting against the first inner ring, and the other side abutting against the inner wall of the outer ring unit; Step S414, based on fixing the outer ring unit and driving the hub bearing clearance detection system to run the first detection state, the standard thickness value of the gasket part, and the second angle value are obtained, and the second initial position of the second inner ring is obtained; Step S415, based on fixing the outer ring unit and driving the hub bearing clearance detection system to run a first detection state and obtaining a second initial position of the second inner ring, driving the inner ring unit to rotate relative to the outer ring unit for a second set time and then stopping the rotation; Step S416, based on the inner ring unit rotating relative to the outer ring unit for a first set time and then stopping, obtaining a first average position of the first inner ring and switching the hub bearing clearance detection system to a second detection state; wherein the second detection state includes driving the detection assembly, the inner ring unit and the rolling unit to move along the central axis of the connecting rod unit in a second direction to a third set position by the first pressure value; the first direction is opposite to the second direction; the third set position includes one side of the second rolling body of the rolling unit abutting against the second inner ring, and the other side abutting against the inner wall of the outer ring unit; Step S417, based on the hub bearing clearance detection system switching to the second detection state, driving the inner ring unit to rotate relative to the outer ring unit for a third set time and then stopping the rotation; Step S418, obtaining a second average position of the second inner ring based on the inner ring unit rotating relative to the outer ring unit for the third set time and then stopping rotating; Step S419, obtaining the negative clearance value of the bearing assembly based on the first initial position, the first average position, the second initial position, the second average position, the standard thickness value of the gasket portion, the first angle value, and the second angle value.

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