Elastic expansion assembly structure and assembly method of thin-walled angular contact full ball bearing ring

Abstract

The application discloses a thin-wall angular contact full ball bearing ring elastic expansion assembly structure and an assembly method, relates to the technical field of thin-wall bearing assembly, and is based on a tool base plate and a fixed assembly ring and contains an electromagnetic action assembly of an electric push rod and a pressure sensing structure. A ball head at the end of the assembly is connected with an outer ring support spring frame supporting a supporting ball, forming an outer ring deformation "transfer structure". The assembly process is divided into three linking stages, namely, fixed assembly, ball embedding and dynamic adaptation. The dynamic adaptation and ball embedding stages are performed synchronously. Through the basic processes of centering positioning, raceway alignment and ball pressing, combined with the real-time adjustment of the fixed assembly ring micro-amplitude reciprocating rotation, pressure sensing feedback and the electromagnetic action assembly, closed-loop control is formed, the controllable elastic expansion of the outer shaft ring is realized, the full ball assembly is completed by utilizing the controllable elastic deformation of the shaft ring, the shaft ring is locked after springback after assembly, the deformation demand of the full ball assembly and the bearing assembly precision are considered, and the assembly efficiency and the yield are improved.

Description

Technical Field

[0001] This invention relates to the field of thin-walled bearing assembly technology, specifically to the elastic expansion assembly structure and assembly method of thin-walled angular contact full-ball bearing rings. Background Technology

[0002] In the process of thin-walled angular contact full ball bearings, the key step is the "forced" assembly process of the balls relative to the inner and outer rings. Ball cage assembly and thermal expansion and contraction assembly methods can be used. However, for full ball assembly requirements, the deformation of the ring caused by the wall thickness and ball clearance must also be considered.

[0003] In practice, the deformability of the bearing ring is also required to achieve full-ball assembly. This involves designing specific elastic grooves or weak areas on the bearing ring and using specialized tooling to induce controllable elastic deformation (expansion) of the bearing ring, allowing for easy insertion of the steel balls. After release, the bearing ring springs back and locks in place. However, controlling the deformation method / degree is a key step affecting assembly quality. If the deformation is excessive, it will affect the overall assembly accuracy of the bearing. Conversely, if the deformation is insufficient, the balls will not be able to be accurately embedded in the bearing raceway. This invention proposes a solution to this problem. Summary of the Invention

[0004] The purpose of this invention is to provide an elastic expansion assembly structure and assembly method for thin-walled angular contact full-ball bearing rings. In the full-ball assembly process of thin-walled bearings, due to the differences in ring deformation and ball assembly accuracy, differences in bearing assembly accuracy may occur in actual operation.

[0005] The objective of this invention can be achieved through the following technical solution: an elastic expansion assembly structure for a thin-walled angular contact full-ball bearing ring, comprising a tooling chassis, an outer ring drive assembly, and a center fixed-mount drive assembly. A fixed-mount ring is rotatably mounted on the tooling chassis. The thin-walled angular contact bearing is placed in the center point region corresponding to the fixed-mount ring. Multiple electromagnetic actuation components are installed along the diameter direction on the inner wall of the fixed-mount ring. An outer ring support spring corresponding to the outer wall of the bearing ring is provided at the end of the drive shaft of the electromagnetic actuation component. The electromagnetic actuation component includes an electric push rod and a pressure sensing structure.

[0006] A pressing structure frame is provided on the upper surface of the tooling chassis. A fixed pressing frame is provided on the pressing structure frame along the position of the outer ring of the angular contact full ball bearing, and a movable pressing column is provided along the position of the rolling ball in the angular contact full ball bearing. An embedding notch is provided on the inner wall of the outer ring of the thin-walled angular contact bearing.

[0007] The configuration is further defined as follows: the outer ring drive assembly includes a drive gear and a drive motor; the center fixed-mount drive assembly includes a fixed-mount frame and a transverse translation push rod; the drive gear maintains external meshing with the outside of the fixed-mount ring; the fixed-mount frame maintains engagement with the inner ring of the angular contact bearing; and the fixed-mount frame moves linearly along the direction parallel to the diameter of the fixed-mount ring via the transverse translation push rod.

[0008] The configuration is further defined as follows: the electromagnetic actuation components are arranged in a circular array along the center point of the tooling chassis, and the electric push rods and pressure sensing structures therein are arranged in an alternating manner, with the outer ring support spring frame and the end of the transmission shaft of the electromagnetic actuation components maintaining a ball joint connection.

[0009] The configuration is further defined as follows: a gap is left between each adjacent outer ring support spring frame, and two support balls are provided at the inner wall position of the corresponding angular contact bearing of the outer ring support spring frame, and the support balls are symmetrically arranged along the setting position of the electromagnetic actuation component transmission shaft.

[0010] Further configuration: the fixed mounting lower pressure frame and the movable lower pressure column are arranged along the direction of the vertical tooling chassis upper surface, and the fixed mounting lower pressure frame and the movable lower pressure column are both fixed ring center points distributed in a ring, and the ends of the fixed mounting lower pressure frame and the movable lower pressure column are both provided with arc-shaped magnetic chucks.

[0011] The configuration is further defined as follows: the fixed pressure frame and the pressure structure frame are fixedly connected, the pressure structure frame is provided with an arc-shaped through groove corresponding to the movable pressure column, and an air pump assembly corresponding to the movable pressure column is installed on the upper surface of the pressure structure frame.

[0012] The configuration is further defined as follows: the number of electromagnetic actuation components is n, and the rotation angle range of the fixed ring is -360 / n° to -360 / n°.

[0013] The elastic expansion assembly method for thin-walled angular contact full-ball bearing rings includes a fixed assembly stage, a ball insertion stage, and a dynamic adaptation stage, as detailed below:

[0014] The mounting stage: The outer and inner shaft rings of the thin-walled angular contact bearing are placed into the mounting ring in sequence. The center mounting component completes the snapping action of the inner shaft ring, and multiple outer ring support springs complete the centering action of the outer shaft ring.

[0015] Bead embedding stage: First, multiple balls are naturally placed between the outer and inner rings. Then, the inner ring is linearly moved in conjunction with the lateral translation push rod and the embedding notch is engaged.

[0016] Dynamic adaptation stage: This stage is carried out simultaneously with the ball embedding stage. When the ball is embedded in the embedding notch, the pressing structure frame is kept horizontal. The fixed pressing frame completes the pressing and fixing of the outer shaft ring. One movable pressing column is used as the actuating part, and the other multiple movable pressing columns are used as the positioning parts. The air pump assembly in the actuating part is connected to press the ball into the position between the outer shaft ring and the inner shaft ring along the position of the embedding notch.

[0017] Meanwhile, the outer ring drive assembly drives the fixed ring to perform multiple reciprocating rotations, and uses a pressure sensing structure to obtain pressure fluctuation values ​​of multiple outer ring support springs, and adjusts the frequency of the fixed ring's reciprocating rotation based on the pressure fluctuation values.

[0018] The present invention has the following beneficial effects:

[0019] 1. Achieve controllable elastic expansion and precise assembly accuracy of thin-walled angular contact full-ball bearing rings, effectively solving the key problem of excessive or insufficient ring deformation in traditional assembly. Through the pressure sensing structure of the electromagnetic actuation component, support pressure data is collected in real time. Combined with the outer ring drive component driving the micro-amplitude reciprocating rotation of the fixed ring, a closed-loop control of pressure detection, rotation frequency adjustment, and local elastic expansion is formed. The ring deformation can be adjusted in real time according to the assembly status. Simultaneously, local precise expansion replaces the traditional integral expansion, enabling on-demand adjustment of ring deformation. This avoids excessive deformation reducing bearing assembly accuracy and affecting subsequent operational stability, while also preventing insufficient deformation from causing the balls to fail to accurately embed into the raceway. It ensures that the ring springs back and locks after assembly, with the raceway and balls tightly fitted, meeting the clearance and accuracy requirements of full-ball assembly.

[0020] 2. Structurally, the outer ring support spring frame adapts to the curvature of the shaft ring through a ball joint connection. The supporting ball transforms sliding friction into rolling friction, preventing wear on the outer wall of the shaft ring. The arc-shaped magnetic chucks of the fixed lower pressure frame and the movable lower pressure column are magnetically fixed, without rigid clamping force, preventing damage to the shaft ring and axial displacement. During assembly, the actions of each component are digitally controlled by the electronic control system, achieving precise control of the electric push rod extension and retraction, pressing pressure, rotation frequency, and push rod translation distance, replacing manual operation and significantly reducing human error. At the same time, the fixed installation, ball embedding, and dynamic adaptation stages are connected and partially synchronized. The magnetically positioned ball replaces manual limiting, and the lateral translation push rod achieves precise alignment of the raceway, solving the problem of ball embedding jamming. The layered and coordinated linkage of each component greatly shortens the assembly process, improves the overall assembly efficiency, and achieves high-precision positioning of the inner and outer shaft rings without damage throughout the process, further ensuring assembly quality. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the elastic expansion assembly structure and assembly method for the thin-walled angular contact full-ball bearing rings proposed in this invention.

[0023] Figure 2 This is a top view of the tooling chassis in this invention;

[0024] Figure 3 This is a diagram showing the clamping position of the corresponding bearing in this invention;

[0025] Figure 4 This is a diagram showing the position of the bearing corresponding to the outer ring support spring frame in this invention;

[0026] Figure 5 This is a schematic diagram of the outer ring support spring frame in this invention;

[0027] Figure 6 This is a schematic diagram of the lower pressure structure frame in this invention.

[0028] In the diagram: 1. Tooling chassis; 2. Outer ring drive assembly; 3. Fixed mounting ring; 4. Lower pressure structure frame; 5. Electromagnetic actuation assembly; 6. Outer ring support spring frame; 601. Supporting ball; 7. Center fixed mounting drive assembly; 8. Movable lower pressure column; 9. Air pump assembly; 10. Fixed mounting lower pressure frame. Detailed Implementation

[0029] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1: First, a brief introduction to the ball embedding process of thin-walled bearings. Although it is called a full-ball embedding process, in reality, the maximum number of balls are embedded according to the diameter of the bearing ring. When adapting to the full-ball assembly requirements, there is always a core problem of difficulty in controlling the deformation of the bearing ring: On the one hand, the thin-walled bearing ring has a thin wall thickness and poor rigidity, and is prone to irreversible deformation due to uneven force during assembly. If the deformation is excessive, it will directly reduce the overall assembly accuracy of the bearing and affect the subsequent operational stability of the bearing; on the other hand, if the force is deliberately controlled to avoid deformation, it will result in insufficient deformation of the bearing ring, and the balls cannot be accurately embedded in the bearing ring raceway, which cannot meet the process requirements of full-ball assembly.

[0031] The current basic process of full-ball bearing assembly is as follows: first, the balls are placed naturally, and then pressed in by pressing them into the notch. In this solution, the tooling chassis 1 is used as the base support. The fixed mounting ring 3 is used to achieve the basic positioning of the bearing ring. The combination structure of the electromagnetic actuation component 5 and the outer ring support spring frame 6 is used to achieve the centering support and controllable elastic expansion of the outer ring. The center fixed mounting drive component 7 is used to complete the snap-fit ​​and position fine adjustment of the inner ring, ensuring the precise alignment of the inner and outer rings. The fixed mounting lower pressure frame 10 and the movable lower pressure column 8 on the lower pressure structure frame 4, together with the air pump component 9, achieve the axial fixation of the outer ring and the precise pressing of the balls. The outer ring drive component 2 drives the fixed mounting ring 3 to rotate slightly back and forth. Combined with the pressure sensing structure of the electromagnetic actuation component 5, a closed-loop control of pressure detection, rotation frequency adjustment and elastic expansion adaptation is formed.

[0032] The overall assembly method is divided into three stages: fixed assembly, ball insertion, and dynamic adaptation. The three stages are connected, and dynamic adaptation is carried out synchronously with the ball insertion stage. Through the process of "centering and positioning → raceway alignment → ball pressing → dynamic adjustment", the controllable elastic deformation of the bearing ring is used to complete the full ball assembly. After the assembly is completed, the bearing ring springs back and locks, which not only meets the deformation requirements of the full ball assembly, but also ensures the bearing assembly accuracy, and achieves the overall operation goal of "controllable deformation, accurate positioning, and efficient assembly".

[0033] Example 2: This example provides an integrated explanation of the coordinated operation process of all core components in the elastic expansion assembly structure of a thin-walled angular contact full-ball bearing ring:

[0034] S1: The tooling chassis 1 is fixed on the working platform. The drive gear of the outer ring drive assembly 2 is externally meshed with the fixed ring 3. The drive motor is in a ready-to-start state. The external meshing of the gears ensures the transmission stability and accuracy of the rotation of the fixed ring 3. Multiple sets of electromagnetic actuation assemblies 5 are arranged in a staggered ring array along the center of the tooling chassis 1. The electric push rod and the pressure sensing structure are staggered. The outer ring support spring frame 6 is connected to the end of the transmission shaft of the electromagnetic actuation assembly 5 through a ball joint. The support ball 601 faces the center of the fixed ring 3. A uniform gap is reserved between adjacent outer ring support spring frames 6. The ball joint connection allows the outer ring support spring frame 6 to adapt to the curvature of the shaft ring. The reserved gap provides deformation space for the elastic expansion of the shaft ring. The lower pressure structure frame 4 is fixed to the tooling chassis 1. On the upper surface, the fixed mounting lower pressure frame 10 is fixedly connected to the lower pressure structure frame 4. The movable lower pressure column 8 is inserted into the arc-shaped through groove and corresponds one-to-one with the air pump assembly 9. Essentially, the air pump assembly drives the movable lower pressure column 8 to move downward in the inflated state, providing downward pressure to press the ball into the outer and inner shaft rings. The arc-shaped magnetic chucks at the ends of the fixed mounting lower pressure frame 10 and the movable lower pressure column 8 are in a de-energized and ready-to-activate state. The arc-shaped through groove provides radial fine-tuning space for the movable lower pressure column 8 to adapt to the assembly of bearings of different specifications. The fixed mounting frame of the central fixed mounting drive assembly 7 is in the initial centering position, and the lateral translation push rod is in the retracted state. The overall structure is ready for assembly and waiting for the bearing rings to be installed. The initial positioning of each component lays the foundation for the high-precision operation of the subsequent assembly.

[0035] S2: Place the outer ring of the thin-walled angular contact bearing into the center area of ​​the mounting ring 3. The electric push rods of multiple sets of electromagnetic actuation components 5 extend synchronously, driving the outer ring support spring 6 to move towards the center of the mounting ring 3, completing the initial centering and fixing of the outer ring until the support ball 601 is fully in contact with the outer wall of the outer ring. The pressure sensing structure collects the initial support pressure of each outer ring support spring 6 in real time. If the pressure value deviation exceeds the threshold, the corresponding electric push rod is individually fine-tuned to achieve the centering of the outer ring. The center of the outer ring coincides with the center of the mounting ring 3. The synchronous extension and individual fine-tuning method achieves high-precision centering of the outer ring. The real-time detection of pressure sensing can ensure that the outer ring is subjected to uniform force, avoiding irreversible deformation of the thin-walled ring due to force deviation. The support ball 601 changes sliding friction into rolling friction, reducing the risk of wear on the outer wall of the outer ring.

[0036] The inner shaft ring is placed in the center area of ​​the outer shaft ring. The mounting bracket of the center mounting drive assembly 7 is engaged with the inner shaft ring. The lateral translation push rod makes a small linear movement to complete the initial centering of the inner shaft ring. The snap-fit ​​connection ensures the synchronous movement of the inner shaft ring and the mounting bracket. The precise linear translation drive can achieve micron-level centering of the inner shaft ring.

[0037] The pressing structure frame 4 remains horizontal. The arc-shaped magnetic chuck at the end of the fixed pressing frame 10 is energized to generate a magnetic attraction force, which completes the axial pressing and fixing of the outer shaft ring, preventing the shaft ring from shifting axially during subsequent assembly. The magnetic fixing has no rigid clamping force, which ensures positioning stability and avoids damage to the outer wall of the outer shaft ring. Thus, the fixed installation and positioning of the inner and outer shaft rings are completed. The entire fixed installation stage achieves non-damaging and high-precision positioning of the inner and outer shaft rings.

[0038] S3: Multiple balls are placed into the gap between the inner and outer axle rings in a natural placement manner. Its essence is the basic principle of the current full ball assembly process. First, the inner axle ring is moved to one end so that the inner axle ring and the inner and outer tangent points of the inner axle ring are in contact, so that there is enough space to put in the corresponding number of balls. Then, the arc-shaped magnetic chuck at the end of the movable pressure column 8 is energized to temporarily attract and position the balls, preventing the balls from rolling off. Magnetic positioning replaces manual limiting, improving the ball placement efficiency while preventing the ball position from shifting.

[0039] The transverse translation push rod of the center fixed-mount drive component 7 drives the fixed-mount frame to make precise linear translation along the diameter direction of the fixed-mount ring 3, thereby driving the inner shaft ring to move synchronously, so that the inner shaft ring raceway is precisely aligned with the embedding notch of the inner wall of the outer shaft ring, creating a precise channel for ball pressing. However, the process of pressing in the ball mainly depends on the deformation process of the outer shaft ring. The precise linear drive of the push rod can change the opening size of the raceway, making it easier for the ball to be quickly inserted into the raceway, solving the jamming problem during ball insertion from the root. This stage starts synchronously with the dynamic adaptation stage, realizing efficient connection of the assembly process and improving the overall assembly efficiency.

[0040] S4: This stage is the core stage where all components work together in unison. Each component coordinates in a layered manner to achieve precise ball bearing press-fitting and controllable elastic expansion of the bearing ring. Each step is carried out step by step as follows:

[0041] S4-1: Select one movable pressing column 8 as the actuating part, and the rest are positioning parts. The magnetic chuck of the positioning part continuously attracts the ball to maintain its position. The air pump assembly 9 corresponding to the actuating part is activated to provide a preset controllable pressure to the movable pressing column 8, pushing it to move downward along the arc-shaped through groove. The ball is pressed into the raceway of the inner and outer shaft rings along the notch of the outer shaft ring. Differentiated pressing makes the pressing force more concentrated, ensuring that the ball is smoothly embedded. The pressure driven by the air pump can be precisely controlled to avoid damage to the ball or shaft ring caused by hard impact. The guiding effect of the arc-shaped through groove ensures that the movement trajectory of the pressing column is accurate.

[0042] S4-2: The drive motor of the outer ring drive assembly 2 starts, driving the drive gear to rotate in both directions. If the number of electromagnetic action components is 6, it will drive the fixed ring 3 to reciprocate multiple times in the range of -60° to 60°. The fixed ring 3 drives the electromagnetic action assembly 5, the outer ring support spring frame 6 and the outer shaft ring to rotate synchronously with a small amplitude, so that the contact surface between the raceway and the ball changes dynamically, reducing the risk of jamming. The small-angle reciprocating rotation can make the elastic deformation of the outer shaft ring more uniform. Its purpose is to "distribute" the deformation process that the outer shaft ring may produce, avoid excessive local deformation, and at the same time, cooperate with the ball press fitting to achieve dynamic adaptation of the raceway.

[0043] S4-3: The pressure sensing structure of the electromagnetic actuation component 5 collects the pressure fluctuation values ​​of the 6 sets of outer ring support springs 6 in real time and transmits the data to the control terminal. The terminal adjusts the rotation frequency of the fixed ring 3 according to the values. If the pressure fluctuation is small, the frequency is maintained; if the pressure fluctuation exceeds the threshold, the frequency is reduced, so that the shaft ring has enough time to complete the elastic deformation adjustment. Its essence is that there is enough space to recover the deformation during the deformation process of the outer shaft ring, avoiding excessive deformation that leads to interference and inability to spring back and reset. This closed-loop control realizes real-time monitoring and dynamic adjustment of the assembly status, accurately controls the deformation of the shaft ring, avoids excessive deformation that reduces assembly accuracy, and prevents insufficient deformation that leads to ball jamming.

[0044] S4-4: If the pressure sensing structure detects a sudden increase in support pressure at a certain position, it indicates that the ball bearing is stuck at that position. The electric push rod of the electromagnetic actuation component 5 at the corresponding position extends slightly, causing the outer ring support spring 6 to move slightly outward. This causes a slight elastic expansion of the outer ring at that position, widening the raceway clearance until the ball bearing passes smoothly. Subsequently, the electric push rod resets, and the outer ring springs back and locks. This localized, precise expansion replaces the traditional integral expansion. Its purpose is to transfer the deformation process of the outer ring to the outer ring support spring. The key objective is to set the action and detection processes in an alternating manner, allowing for precise expansion of the outer ring. During the concentric positioning process, it is also necessary to obtain the reaction force generated by the outer ring on the corresponding outer ring support spring frame through pressure detection. This method provides feedback on the deformation degree of the outer ring. When the reaction force generated by the outer ring on the outer ring support spring frame is large in a local position, it indicates that there is excessive deformation in that area. This can accelerate the reciprocating rotation frequency of the mounting ring on the outer ring. The purpose is to accelerate the "distribution degree" during the deformation process, realize the "on-demand adjustment" of the ring deformation, improve the deformation control accuracy, and achieve a tight fit between the raceway and the balls after the ring rebounds, meeting the clearance requirements of full ball assembly.

[0045] In addition to the above, the following points should be added: Throughout the entire operation, the actions of each component are uniformly coordinated by the electronic control system. The pressure sensing data of the electromagnetic actuation component 5, the rotation frequency of the outer ring drive component 2, the pressing pressure of the air pump component 9, and the moving distance of the lateral translation push rod of the center fixed installation drive component 7 are all digitally controlled, ensuring the synchronization and accuracy of component operation. Digital control replaces manual operation, significantly reducing human error and improving the assembly yield. At the same time, the ball joint connection of the outer ring support spring 6 allows it to adaptively adjust its angle according to the curvature of the outer wall of the outer shaft ring. The support ball 601 transforms sliding friction into rolling friction, ensuring both the fit of the outer ring support spring 6 to the shaft ring and avoiding wear on the outer wall of the shaft ring, further ensuring assembly quality. The structural design and linkage operation of each component complement each other, ensuring high precision and high efficiency in the assembly of thin-walled angular contact full-ball bearings from both structural and operational dimensions.

[0046] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

[0047] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0048] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An elastic expansion assembly structure for thin-walled angular contact full-ball bearing rings, comprising a tooling chassis (1), an outer ring drive assembly (2), and a center-mounted drive assembly (7), characterized in that, A mounting ring (3) is rotatably mounted on the tooling chassis (1). The thin-walled angular contact bearing is placed in the center point area corresponding to the mounting ring (3). Multiple electromagnetic actuation components (5) are installed on the inner wall of the mounting ring (3) along its diameter direction. An outer ring support spring frame (6) corresponding to the outer wall of the bearing ring is provided at the end of the transmission shaft of the electromagnetic actuation component (5). The electromagnetic actuation component (5) includes an electric push rod and a pressure sensing structure. The tooling chassis (1) is provided with a pressing structure frame (4) on its upper surface. The pressing structure frame (4) is provided with a fixed pressing frame (10) along the outer ring of the angular contact full ball bearing and a movable pressing column (8) along the rolling ball of the angular contact full ball bearing. The thin-walled angular contact bearing is provided with an embedded notch on the inner wall of the outer ring.

2. The elastic expansion assembly structure of the thin-walled angular contact full-ball bearing ring according to claim 1, characterized in that, The outer ring drive assembly (2) includes a drive gear and a drive motor. The center fixed-mount drive assembly (7) includes a fixed-mount frame and a transverse translation push rod. The drive gear maintains external meshing with the outside of the fixed-mount ring (3). The fixed-mount frame maintains a snap-fit ​​with the inner ring in the angular contact bearing. The fixed-mount frame moves linearly along the diameter direction parallel to the fixed-mount ring (3) via the transverse translation push rod.

3. The elastic expansion assembly structure of the thin-walled angular contact full-ball bearing ring according to claim 2, characterized in that, The electromagnetic actuation assembly (5) is arranged in a circular array along the center point of the tooling chassis (1), and the electric push rod and pressure sensing structure therein are arranged in an alternating manner. The outer ring support spring frame (6) and the end of the transmission shaft of the electromagnetic actuation assembly (5) are connected in a ball joint manner.

4. The elastic expansion assembly structure of the thin-walled angular contact full-ball bearing ring according to claim 3, characterized in that, There is a gap between each adjacent outer ring support spring (6), and two support balls (601) are provided on the inner wall of the corresponding angular contact bearing of the outer ring support spring (6). The support balls (601) are symmetrically arranged along the transmission shaft of the electromagnetic actuation assembly (5).

5. The elastic expansion assembly structure of the thin-walled angular contact full-ball bearing ring according to claim 4, characterized in that, The fixed mounting pressure frame (10) and the movable pressure column (8) are arranged along the direction of the upper surface of the vertical tooling chassis (1), and the fixed mounting pressure frame (10) and the movable pressure column (8) are both distributed in a ring around the center point of the fixed mounting ring (3). The ends of the fixed mounting pressure frame (10) and the movable pressure column (8) are both provided with arc-shaped magnetic chucks.

6. The elastic expansion assembly structure of the thin-walled angular contact full-ball bearing ring according to claim 5, characterized in that, The fixed pressure frame (10) and the pressure structure frame (4) are fixedly connected. The pressure structure frame (4) has an arc-shaped through groove corresponding to the movable pressure column (8), and the upper surface of the pressure structure frame (4) is equipped with an air pump assembly (9) corresponding to the movable pressure column (8).

7. The elastic expansion assembly structure for thin-walled angular contact full-ball bearing rings according to claim 6, characterized in that, The number of electromagnetic actuation components (5) is n, and the rotation angle range of the fixed ring (3) is -360 / n° to -360 / n°.

8. A method for elastic expansion assembly of thin-walled angular contact full-ball bearing rings, using the elastic expansion assembly structure of thin-walled angular contact full-ball bearing rings as described in any one of claims 1 to 7, characterized in that, This includes the customization stage, the beading stage, and the dynamic adaptation stage, as detailed below: Mounting stage: The outer and inner shaft rings of the thin-walled angular contact bearing are placed into the mounting ring (3) in sequence. The inner shaft ring is snapped in place by the central mounting assembly (7), and the outer shaft ring is centered by the multiple outer ring support springs (6). Bead embedding stage: First, multiple balls are naturally placed between the outer and inner rings. Then, the inner ring is linearly moved in conjunction with the lateral translation push rod and the embedding notch is engaged. Dynamic adaptation stage: It is carried out in sync with the ball embedding stage. When the ball is embedded in the embedding notch, the pressing structure frame (4) is kept horizontal. The fixed pressing frame (10) completes the pressing and fixing of the outer shaft ring. One movable pressing column (8) is used as the action part, and the other multiple movable pressing columns (8) are used as the positioning part. The air pump assembly (9) in the action part is connected to press the ball into the position between the outer shaft ring and the inner shaft ring along the position of the embedding notch. At the same time, the outer ring drive assembly (2) drives the fixed ring (3) to perform multiple reciprocating rotation actions, and obtains multiple pressure fluctuation values ​​of the outer ring support spring frame (6) through the pressure sensing structure, and adjusts the frequency of the reciprocating rotation action of the fixed ring (3) according to the pressure fluctuation values.

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