A wheel hub bearing machining system and method

Abstract

This invention relates to the field of automated equipment technology, specifically to a wheel hub bearing processing system and method. The wheel hub bearing includes a bearing unit and a splined bore; the splined bore is recessed from one end of the bearing unit along its axial direction to the other; a moving assembly includes a gripping unit, a first sliding module, and a second sliding module; and a splined shaft. The wheel hub bearing processing system operates in two states: a preparatory state and an assembly state. In the preparatory state, the minimum included angle between the splined bore axis and the splined shaft axis is less than or equal to a set value, and the splined bore and splined shaft are spaced apart along the axial direction of the splined shaft. In the assembly state, the inner peripheral wall of the splined bore abuts against the outer peripheral wall of the splined shaft. During the process of the gripping unit driving the splined shaft from the preparatory state to the assembly state, a sliding column moves from the end of the sliding groove closest to the splined shaft towards the direction away from the splined shaft. This solves the problem that the splined shaft and splined bore are difficult to align using only a robotic arm.

Description

Technical Field

[0001] This invention relates to the field of automated equipment technology, and more specifically, to a wheel hub bearing processing system and method. Background Technology

[0002] In the machining and assembly process of wheel hub bearings, the precise alignment and insertion of the spline shaft and spline hole is one of the key steps. In existing technologies, this step primarily relies on a collaborative system of a robotic arm and a vision sensor. The robotic arm, as the core actuator, is responsible for driving the spline shaft or spline hole to spatial displacement; its motion trajectory is planned and controlled by a supporting control system. The vision sensor, acting as a position detection unit, is installed at a preset position on the machining station. It collects the three-dimensional spatial coordinates, attitude, and other positional parameters of the spline shaft in real time, converting the detected information into electrical signals that are transmitted to the robotic arm control system. Upon receiving the signals, the control system analyzes and calculates the relative positional relationship between the spline shaft and the spline hole, and then issues drive commands to the robotic arm, guiding it to adjust its motion attitude and path, ultimately completing the insertion of the spline shaft into the spline hole.

[0003] However, the core detection components and signal processing modules of vision sensors have high manufacturing costs, which directly increases the overall investment cost of processing equipment. At the same time, after the vision sensor acquires position information, it needs to go through multiple stages such as signal conversion, transmission and control system calculation, which inevitably results in slight delays. Moreover, the detection process is easily affected by factors such as light and dust in the processing environment, which can cause slight errors. It is difficult to compensate for the slight positional deviation between the spline shaft and the spline hole by the movement of the robotic arm alone, which ultimately increases the difficulty of alignment and affects assembly efficiency. Summary of the Invention

[0004] To address the problem that it is difficult to align the spline shaft and spline hole using only a robotic arm, this invention provides a wheel hub bearing processing system and method.

[0005] In a first aspect, the present invention discloses a wheel hub bearing processing system, the wheel hub bearing processing system comprising:

[0006] A hub bearing includes a bearing unit and a splined bore; the splined bore is recessed from one end of the bearing unit axially toward the other end;

[0007] The moving component includes a gripping unit, a first sliding module, and a second sliding module. The first sliding module includes a sleeve and a sliding groove. The sliding groove is formed by a recess in the peripheral sidewall of the sleeve. 0° < α < 90°, where α is the minimum angle between the length direction of the sliding groove and the axial direction of the sleeve. The second sliding module includes a sliding body and a sliding column. The sliding body is connected to the sliding column. The sliding column is slidably connected to the sliding groove. The gripping unit is connected to the sliding body.

[0008] Spline shaft;

[0009] The working states of the hub bearing machining system include a preparatory state and an assembly state. The preparatory state includes a minimum included angle between the spline hole axis and the spline shaft axis that is less than or equal to a set value, and the spline hole and the spline shaft are spaced apart along the axial direction of the spline shaft. The assembly state includes the inner peripheral wall of the spline hole abutting against the outer peripheral wall of the spline shaft. During the process of the gripping unit driving the spline shaft from the preparatory state to the assembly state, the sliding column moves from the end of the sliding groove near the spline shaft toward the direction away from the spline shaft.

[0010] In some embodiments, the moving component further includes a first elastic portion; one end of the first elastic portion abuts against the sleeve and the other end abuts against the sliding body;

[0011] The working state also includes the compression of the first elastic part during the process of moving from the preparatory state to the assembly state;

[0012] The wheel hub bearing processing system also includes a reset state; the reset state includes a state in which the first elastic part drives the sliding column to move in the sliding groove toward the gripping unit when the force exerted by the sliding body on the first elastic part is less than the elastic force of the first elastic part.

[0013] In some embodiments, the bearing unit includes an outer ring module, an inner ring module, and rolling elements; the outer ring module is sleeved on the outer periphery of the inner ring module; the rolling elements are disposed in the space between the outer ring module and the inner ring module; the rolling elements abut against the outer ring module and the inner ring module respectively; the spline hole is recessed in the bearing unit from one end along the axial direction of the inner ring module to the other end.

[0014] In some embodiments, the gripping unit includes a gripping seat, a first clamping portion, and a second elastic portion; the gripping seat is connected to the sliding body; the first clamping portion is movably connected to the gripping seat; the second elastic portion is connected to the gripping seat; the second elastic portion is disposed within the space surrounding a plurality of the first clamping portions;

[0015] The positioning assembly includes a positioning unit and the splined shaft;

[0016] The working state also includes the first clamping part clamping the inner ring module, and after the gripping unit drives the spline hole to move from the preparatory state to the assembly state in the direction of the spline shaft, the first clamping part releases the inner ring module and the second elastic part drives the inner ring module to move to the positioning state; wherein, the positioning state includes the first dimension being the overlap dimension between the positioning unit and the outer ring module in the axial direction of the outer ring module;

[0017] The assembly state also includes the inner peripheral wall of part of the spline hole abutting against the outer peripheral wall of the spline shaft, the first clamping part clamping the inner ring module, the outer peripheral wall of the outer ring module being located within the enclosing space of the positioning unit, and the overlapping dimension of the positioning unit and the outer ring module in the axial direction of the outer ring module being the second dimension; the second dimension is smaller than the first dimension;

[0018] The wheel hub bearing machining system also includes a machining state; the machining state includes the positioning unit clamping the outer ring module, and the spline shaft driving the spline hole to rotate around the central axis of the spline shaft.

[0019] In some embodiments, the outer ring module includes an outer ring body and a first flange; the inner circumferential surface of the first flange is connected to the outer circumferential wall of the outer ring body; the inner ring module includes an inner ring body and a second flange; the second flange is connected to one axial end of the inner ring body; the outer ring body is sleeved on the outer circumferential side of the inner ring body; the rolling element is disposed in the space between the inner ring body and the outer ring body; the rolling element abuts against the inner ring body and the outer ring body respectively; the second flange is disposed on one axial side of the outer ring body; the first flange and the outer ring body are spaced apart at the ends away from the second flange;

[0020] The assembly state also includes the inner peripheral wall of part of the spline hole abutting against the outer peripheral wall of the spline shaft, the first clamping part clamping the second flange, the outer peripheral wall of the outer ring body being located within the enclosing space of the positioning unit, and the first flange being spaced apart from the positioning unit on the side closer to the first sliding module.

[0021] The positioning state also includes the first flange being abutted against the side of the positioning unit near the first sliding module.

[0022] In some embodiments, X2≥X1+D; where D is the distance between the first flange and the positioning unit along the axial direction of the spline hole when assembled; X2 is the maximum deformation of the second elastic part along the axial direction of the spline hole; X1 is the maximum displacement of the sliding column along the axial direction of the spline hole in the sliding groove; A>D>0.

[0023] In some embodiments, the maximum elastic force of the first elastic portion is less than the maximum elastic force of the second elastic portion.

[0024] In some embodiments, the first sliding module further includes a protrusion; the protrusion is connected to the outer peripheral wall of the sleeve; the protrusion is disposed at one end of the sleeve in the axial direction; the sliding body is sleeved on the outer peripheral side of the sleeve;

[0025] The moving component also includes a limiting part;

[0026] The wheel hub bearing processing system also includes a material handling state; the material handling state includes one end of the limiting part abutting against one end of the protrusion near the sliding body, and the other end abutting against one end of the sliding body near the protrusion;

[0027] The working state also includes the space between the protrusion, the sliding body and the limiting part being spaced apart.

[0028] In a second aspect, the present invention discloses a wheel hub bearing processing method, wherein the wheel hub bearing processing method is applied to a wheel hub bearing processing system according to any embodiment of the first aspect, and the wheel hub bearing processing method includes:

[0029] The gripping unit grips the bearing unit;

[0030] The gripping unit moves the bearing unit to a ready state; wherein, the ready state includes a minimum included angle between the spline hole axis and the spline shaft axis that is less than or equal to a set value, and the spline hole and the spline shaft are spaced apart along the axial direction of the spline shaft;

[0031] The gripping unit drives the spline hole to move toward the spline shaft to the assembly state; wherein, in the assembly state, the inner peripheral wall of the spline hole abuts against the outer peripheral wall of the spline shaft; during the process of the spline shaft moving from the preparatory state to the assembly state, the sliding column moves from the end of the sliding groove near the spline shaft toward the direction away from the spline shaft.

[0032] In some embodiments, the first sliding module further includes a protrusion; the protrusion is connected to the outer peripheral wall of the sleeve; the protrusion is disposed at one end of the sleeve in the axial direction; the sliding body is sleeved on the outer peripheral side of the sleeve; the moving component further includes a limiting part;

[0033] The gripping unit grips the bearing unit, including:

[0034] The limiting part moves to the material picking state; wherein, the material picking state includes one end of the limiting part abutting against the end of the protrusion near the sliding body, and the other end abutting against the end of the sliding body near the protrusion;

[0035] The grasping unit grasps the bearing unit;

[0036] The gripping unit drives the spline hole to move toward the spline shaft to the assembly state, including:

[0037] The limiting part moves to a spatially spaced position relative to the protrusion and the sliding body;

[0038] The gripping unit drives the spline hole to move toward the spline shaft to the assembly state.

[0039] To solve the problem that it is difficult to align the spline shaft and spline hole using only a robotic arm, this invention has the following advantages:

[0040] Through the cooperation of the first and second sliding modules of the moving component, specifically the sliding groove formed by the recessed sidewall of the sleeve of the first sliding module and the sliding column of the second sliding module are slidably connected, and the sliding body is connected to the sliding column and the gripping unit is connected to the sliding body. During the process of the gripping unit driving the spline shaft to move from the preparatory state to the assembly state, the sliding column moves along the sliding groove from the end close to the spline shaft to the direction away from the spline shaft, which can realize the fine adjustment of the position of the spline shaft, thereby achieving precise alignment of the spline hole and the spline shaft. There is no need to use a costly vision sensor, which effectively solves the problem of excessive equipment investment cost and difficulty for the robotic arm to complete the alignment of the spline hole and the spline shaft due to the reliance on vision sensors in the existing technology, and ensures the stable progress of the wheel hub bearing assembly process. Attached Figure Description

[0041] Figure 1 A schematic diagram of the first-view structure of a wheel hub bearing machining system according to one embodiment is shown;

[0042] Figure 2 A schematic diagram of the hub bearing machining system of one embodiment is shown from a second perspective.

[0043] Figure 3 A partial first-view schematic diagram of a wheel hub bearing machining system according to one embodiment is shown;

[0044] Figure 4 A cross-sectional schematic diagram of a wheel hub bearing machining system according to one embodiment is shown;

[0045] Figure 5 A partial second-view schematic diagram of a wheel hub bearing machining system according to one embodiment is shown.

[0046] Reference numerals: 10 Hub bearing; 11 Bearing unit; 111 Outer ring module; 1111 Outer ring body; 1113 First flange; 112 Inner ring module; 1121 Inner ring body; 1122 Second flange; 113 Rolling element; 12 Splined bore; 20 Moving assembly; 21 First sliding module; 211 Sleeve; 212 Sliding groove; 213 Protrusion; 22 Second sliding module; 221 Sliding body; 222 Sliding column; 23 First elastic part; 24 Limiting part; 25 Gripping unit; 251 Gripping seat; 252 First clamping part; 253 Second elastic part; 26 Moving unit; 30 Positioning assembly; 31 Positioning unit; 311 Positioning seat; 312 Second clamping part; 313 Second drive part; 32 Splined shaft; 33 Key drive part. Detailed Implementation

[0047] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the disclosure.

[0048] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation or being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientations or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances. In addition, the terms "installed", "set up", "equipped with", "connected", and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0049] During the assembly of the wheel hub bearing 10, the spline shaft 32 and the spline hole 12 need to be precisely aligned and inserted. In the prior art, visual sensors are often used to assist in positioning in order to achieve this alignment requirement. However, the application of visual sensors will significantly increase the overall investment cost of the equipment. If the spline shaft 32 is moved by the robotic arm alone, it is difficult to eliminate the slight positional offset between the spline shaft 32 and the spline hole 12 due to the lack of a targeted positional deviation compensation mechanism for the motion control of the robotic arm. This results in the inability to reliably achieve precise alignment between the two, which in turn affects the smooth progress of the assembly process of the wheel hub bearing 10.

[0050] Example 1: This example discloses a machining system for a wheel hub bearing 10, such as... Figure 1As shown, the wheel hub bearing 10 machining system includes: wheel hub bearing 10, moving assembly 20 and splined shaft 32. The wheel hub bearing 10 includes bearing unit 11 and splined hole 12. The splined hole 12 is recessed from one end of the bearing unit 11 in the axial direction to the other end, which is adapted to the insertion and assembly requirements of splined shaft 32, laying the structural foundation for the meshing and engagement of the two, and realizing the axial positioning of wheel hub bearing 10 and splined shaft 32.

[0051] The moving component 20 includes a gripping unit 25, a first sliding module 21, and a second sliding module 22; the first sliding module 21 includes a sleeve 211 and a sliding groove 212; as shown Figure 3 As shown, a sliding groove 212 is formed by a recess on the side wall of the sleeve 211; 0° < α < 90°, where α is the minimum angle between the length direction of the sliding groove 212 and the axial direction of the sleeve 211; the second sliding module 22 includes a sliding body 221 and a sliding column 222; the sliding body 221 is connected to the sliding column 222; the sliding column 222 is slidably connected to the sliding groove 212; the gripping unit 25 is connected to the sliding body 221; during the process of the gripping unit 25 driving the hub bearing 10 to move toward the spline shaft 32, when the spline shaft 32 and the spline hole 12 cannot be aligned (the projection area of ​​the spline shaft 32 along its own axial direction is located within the space surrounded by the inner circumferential surface of the spline hole 12, which is alignment; the projection area of ​​the spline shaft 32 along its own axial direction is not completely located within the space surrounded by the inner circumferential surface of the spline hole 12, which is not alignment), the spline shaft 32 abuts against one end of the spline hole 12 in the axial direction. As the moving unit 26 continues to move toward the spline shaft 32, the sliding groove 212 also moves toward the spline shaft 32. When the sliding column 222 moves within the sliding groove 212, the included angle design of 0° < α < 90° allows the spline hole 12 to rotate around its own axis. Once the spline shaft 32 and the spline hole 12 are aligned, as the moving unit 26 continues to move toward the spline shaft 32, the spline shaft 32 can be inserted into the spline hole 12.

[0052] The working states of the wheel hub bearing 10 machining system include a preparatory state and an assembly state. In the preparatory state, the minimum included angle between the axis of the spline hole 12 and the axis of the spline shaft 32 is less than or equal to a set value, which can be 1~3°, so that the axis of the spline hole 12 and the axis of the spline shaft 32 are collinear or nearly collinear. The spline hole 12 and the spline shaft 32 are spaced apart along the axial direction of the spline shaft 32, providing initial conditions for subsequent precise alignment and reducing the difficulty of alignment. In the assembly state, the inner peripheral wall of the spline hole 12 abuts against the outer peripheral wall of the spline shaft 32. During the process of the gripping unit 25 driving the spline shaft 32 to move from the preparatory state to the assembly state, the sliding column 222 moves from the end of the sliding groove 212 close to the spline shaft 32 towards the direction away from the spline shaft 32. During this process, the spline hole 12 will rotate, further cooperating to achieve fine adjustment of the position of the spline hole 12, and finally ensuring the precise alignment of the spline hole 12 and the spline shaft 32. After assembly is completed, the movable component 20 can be moved to a position spaced apart from the hub bearing 10. At this time, the spline shaft 32 can rotate around its own axis, driving the hub bearing 10 to rotate synchronously, and the machining component can machine the outer surface of the hub bearing 10.

[0053] Furthermore, such as Figure 2 As shown, the moving component 20 also includes a first elastic part 23; one end of the first elastic part 23 abuts against the sleeve 211 and the other end abuts against the sliding body 221; the first elastic part 23 establishes an elastic connection between the sleeve 211 and the sliding body 221 by abutting against the sleeve 211 and the sliding body 221 at both ends, providing an elastic force basis for the relative movement of the two and providing power support for the relative movement of the sliding module.

[0054] The working state also includes the process of moving from the preparatory state to the assembly state, during which the first elastic part 23 is compressed; the compression process of the first elastic part 23 can store elastic potential energy, and by storing elastic potential energy, it provides energy reserves for the subsequent realization of the reset state, thereby ensuring that the reset action after processing can be executed smoothly.

[0055] The wheel hub bearing 10 machining system also includes a reset state; the reset state includes a situation where the force exerted by the sliding body 221 on the first elastic part 23 is less than the elastic force of the first elastic part 23, and the first elastic part 23 drives the sliding column 222 to move towards the gripping unit 25 within the sliding groove 212. When the force exerted by the sliding body 221 on the first elastic part 23 is less than its elastic force, the first elastic part 23 releases its stored elastic potential energy, driving the sliding column 222 to move along the sliding groove 212 towards the gripping unit 25, thereby achieving a relative separation between the first sliding module 21 and the second sliding module 22, so that the sliding column 222 is located at one end of the sliding groove 212 near the gripping unit 25, ultimately providing a suitable initial structural state for the next alignment of the spline hole 12 and the spline shaft 32.

[0056] Furthermore, such as Figure 4 As shown, the bearing unit 11 includes an outer ring module 111, an inner ring module 112, and rolling elements 113. The outer ring module 111 is fitted onto the outer periphery of the inner ring module 112, forming a stable space, which provides a precise installation position for the rolling elements 113 and ensures the relative rotational freedom between the inner ring module 112 and the outer ring module 111. The rolling elements 113 are disposed within the space between the outer ring module 111 and the inner ring module 112. The rolling elements 113 abut against the outer ring module 111 and the inner ring module 112 respectively, and rotate through the outer ring module 111 and the inner ring module 112. The rolling motion of body 113 replaces traditional sliding friction, effectively reducing frictional resistance when bearing unit 11 rotates, improving rotational efficiency and reducing component wear; the spline hole 12 is recessed from one end of the axial bearing unit 11 along the inner ring module 112 towards the other end, so that the spline hole 12 and the inner ring module 112 form an integrated structure, ensuring the coaxiality of the spline hole 12 and the inner ring module 112, providing structural guarantee for the precise fit between the spline shaft 32 and the spline hole 12, while ensuring stability and reliability in the torque transmission process.

[0057] Furthermore, such as Figure 5 As shown, the gripping unit 25 includes a gripping seat 251, a first clamping part 252, and a second elastic part 253. The gripping seat 251 is connected to the sliding body 221, enabling the power of the sliding body 221 to be transmitted to the gripping unit 25, ensuring that the gripping unit 25 responds synchronously with the sliding movement of the sliding body 221. The first clamping part 252 is movably connected to the gripping seat 251. The first driving part can drive the first clamping part 252 to clamp. The second elastic part is connected to the gripping seat 251, providing installation assurance for the stable output of its elastic force. The second elastic part 253 is disposed within the space surrounding multiple first clamping parts 252. When the spline shaft 32 and the spline hole 12 are aligned, the elastic support of the second elastic part 253 can push the inner ring module 112 to fit towards the spline shaft 32, increasing the overlap length of the spline shaft 32 and the spline hole 12 in the axial direction of the spline shaft 32, thereby improving the tightness of the fit between the two and achieving a stable clamping effect.

[0058] The positioning assembly 30 includes a positioning unit 31 and a splined shaft 32. Further, the positioning unit 31 includes a positioning seat 311, a second clamping part 312, and a second driving part 313. The positioning seat 311 is connected to the second clamping part 312, and the second driving part 313 can drive the second clamping part 312 to clamp. The positioning assembly 30 also includes a key driving part 33, which can drive the splined shaft 32 to rotate around its own axis.

[0059] The working state also includes the first clamping part 252 clamping the inner ring module 112 to prevent the inner ring module 112 from being offset relative to the first clamping part 252 in the axial or radial direction during the movement of the spline hole 12 driven by the gripping unit 25, thus ensuring the positional accuracy during the movement. After the gripping unit 25 drives the spline hole 12 to move from the preparatory state to the assembly state in the direction of the spline shaft 32, the first clamping part 252 releases the inner ring module 112 and the second elastic part 253 drives the inner ring module 112 to move to the positioning state. The positioning state includes the first dimension being the overlap dimension between the positioning unit 31 and the outer ring module 111 in the axial direction of the outer ring module 111.

[0060] The assembly state also includes the inner peripheral wall of part of the spline hole 12 abutting against the outer peripheral wall of the spline shaft 32, establishing a preliminary fit between the spline shaft 32 and the spline hole 12, ensuring the basic stability of torque transmission. The first clamping part 252 clamps the inner ring module 112, ensuring that the relative position of the inner ring module 112 and the gripping unit 25 is fixed during the assembly stage. The outer peripheral wall of the outer ring module 111 is located within the enclosing space of the positioning unit 31. The overlapping dimension of the positioning unit 31 and the outer ring module 111 in the axial direction of the outer ring module 111 is the second dimension. The second dimension is smaller than the first dimension, and the difference in size provides a travel margin for the axial movement of the inner ring module 112 driven by the second elastic part 253, ensuring a smooth switch of the positioning state. Through the active drive of the second elastic part 253, the fit depth between the spline shaft 32 and the spline hole 12 is further optimized, and at the same time, the positioning unit 31 and the outer ring module 111 are overlapped in the axial direction by the first dimension, realizing the precise positioning of the outer ring module 111.

[0061] The wheel hub bearing 10 machining system also includes a machining state; the machining state includes the positioning unit 31 clamping the outer ring module 111, the spline shaft 32 driving the spline hole 12 to rotate around the central axis of the spline shaft 32, driving the inner ring module 112 to rotate synchronously, providing stable rotational power for the subsequent machining processes of the wheel hub bearing 10, and ensuring the continuity and reliability of the machining process.

[0062] Furthermore, the outer ring module 111 includes an outer ring body 1111 and a first flange 1113; the inner circumferential surface of the first flange 1113 is connected to the outer circumferential wall of the outer ring body 1111, forming a stable integrated structure to ensure the structural strength of the outer ring module 111, while providing a reliable force-bearing carrier for the abutment fit in the positioning state; the inner ring module 112 includes an inner ring body 1121 and a second flange 1122; the second flange 1122 is connected to one axial end of the inner ring body 1121 to realize the synchronous movement of the inner ring body 1121 and the second flange 1122, ensuring that the first clamping part 252 can stably clamp the second flange 1122. The inner ring 1121 is moved to ensure the synchronicity of clamping and movement; the outer ring 1111 is sleeved on the outer periphery of the inner ring 1121; the rolling element 113 is disposed in the space between the inner ring 1121 and the outer ring 1111; the rolling element 113 abuts against the inner ring 1121 and the outer ring 1111 respectively; the second flange 1122 is disposed on the axial side of the outer ring 1111; the first flange 1113 and the outer ring 1111 are spaced apart from the end away from the second flange 1122, so as to reserve a reasonable gap for the axial structure of the outer ring module 111, avoid component interference, and at the same time provide a structural premise for the spacing in the assembly state;

[0063] The assembly state also includes the inner peripheral wall of part of the spline hole 12 abutting against the outer peripheral wall of the spline shaft 32, the first clamping part 252 clamping the second flange 1122, fixing the position of the inner ring module 112, preventing the inner ring module 112 from shifting during the assembly process, ensuring assembly accuracy, the outer peripheral wall of the outer ring body 1111 is located within the enclosed space of the positioning unit 31, the first flange 1113 and the positioning unit 31 are spaced apart on the side near the first sliding module 21, reserving axial travel for the switching of the positioning state, ensuring smooth state transition;

[0064] The positioning state also includes the first flange 1113 abutting against the side of the positioning unit 31 near the first sliding module 21, so that one axial end of the positioning unit 31 and one axial end of the bearing form a reliable abutment, avoiding an excessively large included angle between the axis of the hub bearing 10 and the positioning unit 31 (i.e., the minimum included angle between the axis of the hub bearing 10 and the positioning unit 31 is greater than the set value), preventing the axis of the hub bearing 10 and the positioning unit 31 from shifting, and ensuring the coaxiality accuracy of the spline shaft 32 and the spline hole 12 during subsequent processing.

[0065] Furthermore, X2 ≥ X1 + D, meaning the maximum deformation of the second elastic part 253 must cover the sum of the maximum axial displacement of the sliding column 222 and the axial distance between the first flange 1113 and the positioning unit 31 in the assembled state. This quantitative constraint ensures that the second elastic part 253 has sufficient deformation to drive the inner ring module 112 to the positioning state, guaranteeing that the axial overlap length between the spline shaft 32 and the spline hole 12 meets the requirements for stable clamping. Here, D is the axial distance between the first flange 1113 and the positioning unit 31 along the spline hole 12 in the assembled state. Spacing; X2 is the maximum deformation of the second elastic part 253 along the axial direction of the spline hole 12; X1 is the maximum displacement of the sliding column 222 along the axial direction of the spline hole 12 in the sliding groove 212; A > D > 0, D > 0 can avoid direct collision between the first flange 1113 and the positioning unit 31 in the assembled state, and prevent wear or damage to the parts; A is a set value. By limiting A > D, it can prevent the spacing D from being too large, which would cause the axial travel of the entire device to be too long, thus optimizing the structural layout and operating efficiency of the device. The specific value of A can be set according to the actual working conditions (such as 3mm).

[0066] Furthermore, the maximum elastic force of the first elastic part 23 is less than the maximum elastic force of the second elastic part 253. The first elastic part 23 needs to realize the function of pushing the hub bearing 10, so it needs a larger elastic force to ensure the effective execution of the pushing action; the second elastic part 253 is used for the reset operation, and has a lower elasticity requirement. It can complete the reset function without excessive elastic force, avoiding action failure or component damage caused by mismatch of elastic force, and ensuring the coordination and reliability of the system operation.

[0067] Furthermore, the first sliding module 21 also includes a protrusion 213; the protrusion 213 is connected to the outer peripheral wall of the sleeve 211, so that the two form a stable integrated structure, ensuring the load-bearing strength of the protrusion 213 and avoiding structural deformation when they come into contact; the protrusion 213 is located at one end of the sleeve 211 in the axial direction; the sliding body 221 is sleeved on the outer peripheral side of the sleeve 211, ensuring the relative sliding freedom of the sliding body 221 and the sleeve 211, and providing a structural basis for the axial movement of the sliding body 221;

[0068] The moving component 20 also includes a limiting part 24. Through the abutting action of the limiting part 24, the relative distance between the sliding body 221 and the sleeve 211 can be precisely controlled, so as to avoid the sliding module from moving unexpectedly during material picking and ensure the stability of the material picking action.

[0069] The wheel hub bearing 10 processing system also includes a material handling state; the material handling state includes one end of the limiting part 24 abutting against one end of the protrusion 213 near the sliding body 221, and the other end abutting against one end of the sliding body 221 near the protrusion 213. The relative position of the sliding body 221 and the sleeve 211 is limited by rigid abutment, so that when the gripping unit 25 grips the bearing, the sliding column 222 can be stably located in the sliding groove 212 on the side near the gripping unit 25, while avoiding the first sliding module 21 and the second sliding module 22 from getting too close to each other;

[0070] The working state also includes the space between the protrusion 213 and the sliding body 221 and the limiting part 24. When the spline shaft 32 and the spline hole 12 are not aligned, sufficient travel space is reserved for the axial movement of the sliding body 221 during the assembly stage, ensuring that the sliding column 222 can move smoothly along the sliding groove 212 during assembly, and ensuring the effective execution of the assembly action.

[0071] Example 2: This example provides a method for machining a wheel hub bearing 10. This method is applied to any of the wheel hub bearing 10 machining devices described in the above examples. The method may include steps S10 to S30, each step of which is explained in detail below:

[0072] In step S10, the gripping unit 25 grips the bearing unit 11;

[0073] In step S20, the gripping unit 25 grips the bearing unit 11 and moves the bearing unit 11 to a preparatory state. The preparatory state includes the minimum included angle between the axis of the spline hole 12 and the axis of the spline shaft 32 being less than or equal to a set value. This ensures the alignment of the spline hole 12 and the spline shaft 32 for subsequent assembly, reducing the difficulty of correcting deviations during assembly. The spline hole 12 and the spline shaft 32 are spaced apart along the axial direction of the spline shaft 32 to reserve reasonable travel space for subsequent movement towards the assembly state, avoiding initial position interference that could prevent smooth assembly and ensuring smooth state transition.

[0074] In step S30, the bearing unit 11 is moved to a preparatory state by the gripping unit 25, and the gripping unit 25 drives the spline hole 12 to move toward the spline shaft 32 to an assembly state. In the assembly state, the inner peripheral wall of the spline hole 12 abuts against the outer peripheral wall of the spline shaft 32. During the movement of the spline shaft 32 from the preparatory state to the assembly state, the sliding column 222 moves from the end of the sliding groove 212 near the spline shaft 32 toward the direction away from the spline shaft 32. During this movement, the sliding column 222 moves from the end of the sliding groove 212 near the spline shaft 32 toward the direction away from the spline shaft 32. Combined with the 0° < α < 90° angle design of the sliding groove 212, fine-tuning of the position of the spline shaft 32 can be achieved, thereby further ensuring the precise alignment of the spline hole 12 and the spline shaft 32 and ensuring the reliability of the assembly quality.

[0075] Furthermore, the first sliding module 21 also includes a protrusion 213; the protrusion 213 is connected to the outer peripheral wall of the sleeve 211; the protrusion 213 is located at one end of the sleeve 211 in the axial direction; the sliding body 221 is sleeved on the outer peripheral side of the sleeve 211, providing a precise abutment carrier for the limiting part 24, and the sliding body 221 sleeved on the outer peripheral side of the sleeve 211 ensures the relative sliding freedom of the two; the moving component 20 also includes a limiting part 24, which provides structural support for limiting the position of the material picking state;

[0076] Step S10 includes:

[0077] Step S11: The limiting part 24 moves to the material picking state; wherein, the material picking state includes one end of the limiting part 24 abutting against the end of the protrusion 213 near the sliding body 221, and the other end abutting against the end of the sliding body 221 near the protrusion 213, which can rigidly limit the relative position of the sliding body 221 and the sleeve 211, and prevent the sliding module from moving unexpectedly during the material picking process, thereby ensuring that the gripping unit 25 clamps the bearing unit 11 stably and accurately, laying the positional foundation for subsequent assembly operations;

[0078] Step S12: Based on the movement of the limiting part 24 to the material picking state, the gripping unit 25 grips the bearing unit 11;

[0079] Step S30 includes:

[0080] Step S31: The limiting part 24 moves to a space interval between itself and the protrusion 213 and the sliding body 221, releasing the position restriction on the sliding body 221, allowing the sliding body 221 to slide freely along the sleeve 211, reserving sufficient travel space for the sliding column 222 to move in the sliding groove 212, ensuring that the gripping unit 25 can smoothly drive the spline hole 12 to move toward the spline shaft 32, and ultimately ensuring that the spline hole 12 and the spline shaft 32 are accurately connected to the assembly state, realizing the orderly connection of material picking and assembly actions;

[0081] Step S32: Based on the spatial interval set between the limiting part 24 and the protrusion 213 and the sliding body 221, the gripping unit 25 drives the spline hole 12 to move toward the spline shaft 32 to the assembly state.

[0082] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes can be made in form and detail without departing from the scope of this disclosure.

Claims

1. A wheel hub bearing machining system, characterized in that, The hub bearing machining system includes: A hub bearing includes a bearing unit and a splined bore; the splined bore is recessed from one end of the bearing unit axially toward the other end; The moving component includes a gripping unit, a first sliding module, and a second sliding module. The first sliding module includes a sleeve and a sliding groove. The sliding groove is formed by a recess in the peripheral sidewall of the sleeve. 0° < α < 90°, where α is the minimum angle between the length direction of the sliding groove and the axial direction of the sleeve. The second sliding module includes a sliding body and a sliding column. The sliding body is connected to the sliding column. The sliding column is slidably connected to the sliding groove. The gripping unit is connected to the sliding body. Spline shaft; The working states of the hub bearing machining system include a preparatory state and an assembly state. The preparatory state includes a minimum included angle between the spline hole axis and the spline shaft axis that is less than or equal to a set value, and the spline hole and the spline shaft are spaced apart along the axial direction of the spline shaft. The assembly state includes the inner peripheral wall of the spline hole abutting against the outer peripheral wall of the spline shaft. During the process of the gripping unit driving the spline shaft from the preparatory state to the assembly state, the sliding column moves from the end of the sliding groove near the spline shaft toward the direction away from the spline shaft. The moving component further includes a first elastic part; one end of the first elastic part abuts against the sleeve and the other end abuts against the sliding body; The working state also includes the compression of the first elastic part during the process of moving from the preparatory state to the assembly state; The wheel hub bearing processing system also includes a reset state; the reset state includes a state in which the first elastic part drives the sliding column to move in the sliding groove toward the gripping unit when the force exerted by the sliding body on the first elastic part is less than the elastic force of the first elastic part.

2. The wheel hub bearing processing system according to claim 1, characterized in that, The bearing unit includes an outer ring module, an inner ring module, and rolling elements; the outer ring module is sleeved on the outer periphery of the inner ring module; the rolling elements are disposed in the space between the outer ring module and the inner ring module; the rolling elements abut against the outer ring module and the inner ring module respectively; the spline hole is recessed in the bearing unit from one end along the axial direction of the inner ring module to the other end.

3. The wheel hub bearing processing system according to claim 2, characterized in that, The gripping unit includes a gripping seat, a first clamping part, and a second elastic part; the gripping seat is connected to the sliding body; the first clamping part is movably connected to the gripping seat; the second elastic part is connected to the gripping seat; the second elastic part is disposed within the space surrounded by a plurality of first clamping parts; The positioning assembly includes a positioning unit and the splined shaft; The working state also includes the first clamping part clamping the inner ring module, and after the gripping unit drives the spline hole to move from the preparatory state to the assembly state in the direction of the spline shaft, the first clamping part releases the inner ring module and the second elastic part drives the inner ring module to move to the positioning state; wherein, the positioning state includes the first dimension being the overlap dimension between the positioning unit and the outer ring module in the axial direction of the outer ring module; The assembly state also includes the inner peripheral wall of part of the spline hole abutting against the outer peripheral wall of the spline shaft, the first clamping part clamping the inner ring module, the outer peripheral wall of the outer ring module being located within the enclosing space of the positioning unit, and the overlapping dimension of the positioning unit and the outer ring module in the axial direction of the outer ring module being the second dimension; the second dimension is smaller than the first dimension; The wheel hub bearing machining system also includes a machining state; the machining state includes the positioning unit clamping the outer ring module, and the spline shaft driving the spline hole to rotate around the central axis of the spline shaft.

4. The wheel hub bearing processing system according to claim 3, characterized in that, The outer ring module includes an outer ring body and a first flange; the inner circumferential surface of the first flange is connected to the outer circumferential wall of the outer ring body; the inner ring module includes an inner ring body and a second flange; the second flange is connected to one axial end of the inner ring body; the outer ring body is sleeved on the outer circumferential side of the inner ring body; the rolling element is disposed in the space between the inner ring body and the outer ring body; the rolling element abuts against the inner ring body and the outer ring body respectively; the second flange is disposed on one axial side of the outer ring body; the first flange and the outer ring body are spaced apart at the ends away from the second flange; The assembly state also includes the inner peripheral wall of part of the spline hole abutting against the outer peripheral wall of the spline shaft, the first clamping part clamping the second flange, the outer peripheral wall of the outer ring body being located within the enclosing space of the positioning unit, and the first flange being spaced apart from the positioning unit on the side closer to the first sliding module. The positioning state also includes the first flange being abutted against the side of the positioning unit near the first sliding module.

5. A wheel hub bearing machining system according to claim 4, characterized in that, X2≥X1+D; where D is the distance between the first flange and the positioning unit along the axial direction of the spline hole when assembled; X2 is the maximum deformation of the second elastic part along the axial direction of the spline hole; X1 is the maximum displacement of the sliding column along the axial direction of the spline hole in the sliding groove; A>D>0, and the specific value of A can be set according to the actual working conditions.

6. The wheel hub bearing machining system according to claim 4, characterized in that, The maximum elastic force of the first elastic part is less than the maximum elastic force of the second elastic part.

7. The wheel hub bearing machining system according to claim 1, characterized in that, The first sliding module further includes a protrusion; the protrusion is connected to the outer peripheral wall of the sleeve; the protrusion is disposed at one end of the sleeve in the axial direction; the sliding body is sleeved on the outer peripheral side of the sleeve; The moving component also includes a limiting part; The wheel hub bearing processing system also includes a material handling state; the material handling state includes one end of the limiting part abutting against one end of the protrusion near the sliding body, and the other end abutting against one end of the sliding body near the protrusion; The working state also includes the space between the protrusion, the sliding body and the limiting part being spaced apart.

8. A method for machining a wheel hub bearing, characterized in that, The hub bearing machining method is applied to a hub bearing machining system according to any one of claims 1-7, and the hub bearing machining method includes: The gripping unit grips the bearing unit; The gripping unit moves the bearing unit to a ready state; wherein, the ready state includes a minimum included angle between the spline hole axis and the spline shaft axis that is less than or equal to a set value, and the spline hole and the spline shaft are spaced apart along the axial direction of the spline shaft; The gripping unit drives the spline hole to move toward the spline shaft to the assembly state; wherein, in the assembly state, the inner peripheral wall of the spline hole abuts against the outer peripheral wall of the spline shaft; during the process of the spline shaft moving from the preparatory state to the assembly state, the sliding column moves from the end of the sliding groove near the spline shaft toward the direction away from the spline shaft.

9. A method for machining a wheel hub bearing according to claim 8, characterized in that, The first sliding module further includes a protrusion; the protrusion is connected to the outer peripheral wall of the sleeve; the protrusion is disposed at one end of the sleeve along the axial direction; the sliding body is sleeved on the outer peripheral side of the sleeve; the moving component further includes a limiting part; The gripping unit grips the bearing unit, including: The limiting part moves to the material picking state; wherein, the material picking state includes one end of the limiting part abutting against the end of the protrusion near the sliding body, and the other end abutting against the end of the sliding body near the protrusion; The grasping unit grasps the bearing unit; The gripping unit drives the spline hole to move toward the spline shaft to the assembly state, including: The limiting part moves to a spatially spaced position relative to the protrusion and the sliding body; The gripping unit drives the spline hole to move toward the spline shaft to the assembly state.

Images