A method and system for processing ball cage components

Abstract

This invention relates to the field of transmission technology, specifically to a method and system for processing a ball cage assembly. The method includes: triggering a processing command to bring the open end of the ball cage assembly abutting against a positioning unit; driving the positioning unit to rotate, causing a positioning protrusion of the positioning unit to extend into the raceway of the ball cage assembly; driving the positioning unit to rotate the ball cage assembly to a first predetermined position; driving a limiting post to rotate to a second predetermined position, transporting the ball cage assembly and fitting it onto the outer periphery of the limiting post; wherein a limiting protrusion connected to the limiting post extends into the raceway; driving a clamping unit to abut against the end of the ball cage assembly away from the limiting post, causing one end of the limiting post to abut against the internal space of the ball cage assembly; driving the limiting post to rotate, causing the limiting protrusion to drive the ball cage assembly to rotate; and a processing unit abutting against and processing the outer peripheral surface of the ball cage assembly. This solves the problem of high scrap rate when precision machining the outer peripheral surface of the ball cage.

Description

Technical Field

[0001] This invention relates to the field of transmission technology, and more specifically, to a method and system for processing ball cage components. Background Technology

[0002] As the core transmission component of a constant velocity universal joint, the ball cage is widely used in power transmission systems of automobiles, construction machinery, and other industries. Its main function is to achieve constant speed power transmission between two shafts when the included angle changes. The ball cage typically adopts a thin-walled hollow spherical structure with multiple arc-shaped raceway grooves around its circumference to accommodate the steel balls. The dimensional accuracy, form and position tolerances, and surface roughness of the raceways directly determine the transmission efficiency, operational smoothness, and service life of the constant velocity universal joint.

[0003] In precision machining processes such as CNC milling, high-precision grinding, and hard turning of the outer circumference of a ball cage, to ensure machining efficiency and surface accuracy, the ball cage needs to be driven to rotate at high speed around its own axis. At the same time, a clamping device is needed to reliably position and fix the ball cage. However, if a traditional rigid clamping device is used to apply a large clamping force, although it can suppress centrifugal displacement during high-speed rotation to a certain extent and ensure clamping stability, the excessive clamping force can easily cause local plastic deformation or stress concentration in the thin-walled part of the ball cage, resulting in out-of-tolerance roundness error, uneven wall thickness, and even damage to the preset raceway curvature. If the clamping force is reduced to avoid deformation, the radial runout of the ball cage will be aggravated due to centrifugal force under high-speed rotation conditions. This not only results in a high surface roughness but may also cause relative slippage between the fixture and the ball cage, causing the machining dimensions to deviate from the design requirements, thus resulting in a high scrap rate. Summary of the Invention

[0004] To address the issue of high scrap rates during precision machining of the outer circumference of ball cages, this invention provides a method and system for machining ball cage components.

[0005] Firstly, this application proposes a method for processing a ball cage assembly, including:

[0006] Triggered by a processing command, the open end of the ball cage assembly abuts against the positioning unit;

[0007] Drive the positioning unit to rotate, so that the positioning protrusion of the positioning unit extends into the raceway of the ball cage assembly;

[0008] Drive the positioning unit to rotate, causing the ball cage assembly to rotate to a first predetermined position;

[0009] The driving limit post is rotated to the second set position, and the ball cage assembly is transported and sleeved on the outer periphery of the limit post; wherein, the limiting protrusion connected to the limit post extends into the raceway;

[0010] The drive clamping unit abuts against the end of the ball cage assembly away from the limiting post, so that the end of the limiting post abuts against the internal space of the ball cage assembly;

[0011] By driving the limiting post to rotate, the limiting protrusion drives the ball cage assembly to rotate;

[0012] The processing unit abuts against the outer peripheral surface of the ball cage assembly and performs processing.

[0013] In some embodiments, driving the positioning unit to rotate causes the positioning protrusion of the positioning unit to extend into the raceway of the ball cage assembly:

[0014] The rotation of the positioning unit is a reciprocating rotation within a set angle.

[0015] In some embodiments, the ball cage assembly includes a ball cage unit; the ball cage unit includes a ball cage shell and a plurality of said raceways; the raceways are recessed into the inner peripheral wall of the ball cage shell;

[0016] The step of triggering a machining command to bring one open end of the ball cage assembly abutting against the positioning unit includes:

[0017] Based on the processing command trigger, the raceway tilt data is acquired; wherein, the tilt data includes the tilt direction along the circumference of the ball cage shell in the direction from the opening of the ball cage assembly to the bottom wall of the ball cage assembly.

[0018] Based on the acquired raceway tilt data, the open end of the ball cage assembly is brought into contact with the positioning unit;

[0019] The step of driving the limiting post to rotate, and the limiting protrusion driving the ball cage assembly to rotate, includes:

[0020] Based on the tilt data, the limiting post is driven to rotate in a set direction;

[0021] The rotation of the limiting post drives the limiting protrusion to rotate the ball cage assembly.

[0022] In some embodiments, driving the limiting post to rotate along a set direction based on the tilt data includes:

[0023] Based on the tilt data of all the raceways as a first tilt state, the limiting post is driven to rotate along the second circumferential direction of the circumference of the ball cage shell; wherein, the first tilt state is that the raceway is tilted along the first circumferential direction of the circumference of the ball cage shell in the direction from the opening of the ball cage assembly to the bottom wall of the ball cage assembly.

[0024] In some embodiments, driving the limiting post to rotate along a set direction based on the tilt data includes:

[0025] Based on the tilt data of all the raceways being in a second tilt state, the limiting post is driven to rotate in the first circumferential direction of the circumference of the ball cage shell; wherein, the second tilt state is that the raceway is tilted in the second circumferential direction of the circumference of the ball cage shell in the direction from the opening of the ball cage assembly to the bottom wall of the ball cage assembly.

[0026] In some embodiments, a portion of the raceway is inclined in a first circumferential direction along the circumference of the cage shell in the direction from the opening of the cage assembly to the bottom wall of the cage assembly; another portion of the raceway is inclined in a second circumferential direction along the circumference of the cage shell in the direction from the opening of the cage assembly to the bottom wall of the cage assembly; the first circumferential direction and the second circumferential direction are opposite.

[0027] Based on the tilt data, driving the limiting post to rotate along a set direction includes:

[0028] Based on the inclination data of the raceway where the limiting protrusion is located being in a first inclination state, the limiting post is driven to rotate in the second circumferential direction of the circumference of the ball cage shell; or, based on the inclination data of the raceway where the limiting protrusion is located being in a second inclination state, the limiting post is driven to rotate in the first circumferential direction of the circumference of the ball cage shell.

[0029] In some embodiments, the raceway includes a first raceway and a second raceway; the first raceway is inclined in a first circumferential direction along the circumference of the cage shell in the direction from the opening of the cage assembly to the bottom wall of the cage assembly; the second raceway is inclined in a second circumferential direction along the circumference of the cage shell in the direction from the opening of the cage assembly to the bottom wall of the cage assembly; the first raceway and the second raceway are arranged alternately and at intervals along the circumference of the cage shell; in a defined plane, the distance between the center point of one of the first raceways and the center point of an adjacent second raceway is L1, and the distance between the center point of one of the first raceways and the center point of another adjacent second raceway is L2; ​​L1 > L2.

[0030] The positioning protrusion includes a first positioning protrusion and a second positioning protrusion; at least one adjacent first positioning protrusion and second positioning protrusion are at a distance of K1, or at least one adjacent first positioning protrusion and second positioning protrusion are at a distance of K2; K1 > K2.

[0031] The step of driving the positioning unit to rotate, causing the positioning protrusion of the positioning unit to extend into the raceway of the ball cage assembly, includes:

[0032] The positioning unit is driven to rotate. Based on two adjacent first positioning protrusions and second positioning protrusions as K1, the first positioning protrusion extends into the first raceway, and the second positioning protrusion extends into the second raceway with a distance of L1 from the first raceway where the first positioning protrusion is located.

[0033] The positioning unit is driven to rotate. Based on two adjacent first positioning protrusions and second positioning protrusions, K2, the first positioning protrusion extends into the first raceway, and the second positioning protrusion extends into the second raceway, which is L2 away from the first raceway where the first positioning protrusion is located.

[0034] In some embodiments, the processing unit abuts against the outer peripheral surface of the ball cage assembly and is processing it. At the contact point between the processing unit and the ball cage assembly, the linear velocity of the processing unit relative to the ball cage assembly is downward.

[0035] In some embodiments, the drive limiting post rotates to a second predetermined position, transporting and fitting the ball cage assembly onto the outer periphery of the limiting post; wherein, the limiting protrusion connected to the limiting post extends into the raceway, including:

[0036] The ball cage assembly at the first set position is lifted by the transport component to separate from the positioning unit; at the first set position, at least one of the positioning protrusions is located directly above or directly below the projection of the rotation axis of the limiting post;

[0037] The ball cage assembly is raised, lowered, and translated by the transport component, and rotated so that the opening faces the limiting post, driving the limiting post to rotate to a second set position; in the second set position, the limiting protrusion is located directly above the limiting post;

[0038] The ball cage assembly is translated along the rotation axis of the limiting post by the transport assembly until the ball cage assembly is fitted onto the outer periphery of the limiting post; wherein the limiting protrusion connected to the limiting post extends into the raceway.

[0039] Secondly, this application proposes a cage assembly processing system, which is applied to any of the cage assembly processing methods in the first aspect; the cage assembly processing system includes:

[0040] A ball cage assembly includes a ball cage unit; the ball cage unit includes a ball cage shell and a raceway; the raceway is recessed into the inner peripheral wall of the ball cage shell; the raceway passes through one open end of the ball cage shell;

[0041] The positioning unit includes a positioning disk and a positioning protrusion; the positioning protrusion is connected to the outer peripheral wall of the positioning disk; the outer diameter of the positioning disk is smaller than the inner diameter of the ball cage shell; the shape of the positioning protrusion is adapted to the shape of the raceway.

[0042] The processing assembly includes a processing machine, a processing unit, a clamping unit, and a limiting unit; the limiting unit includes a limiting post and a limiting protrusion; the limiting post is rotatably connected to the processing machine; the outer diameter of the limiting post is smaller than the inner diameter of the ball cage shell; the shape of the limiting protrusion is adapted to the shape of the raceway; the clamping unit is movably connected to the processing machine, and the direction of movement of the clamping unit coincides with the axis of the limiting post; the processing unit is movably connected to the processing machine.

[0043] In some embodiments, the raceway includes a first raceway and a second raceway; the first raceway is inclined in a first circumferential direction along the circumference of the cage shell in the direction from the opening of the cage assembly to the bottom wall of the cage assembly; the second raceway is inclined in a second circumferential direction along the circumference of the cage shell in the direction from the opening of the cage assembly to the bottom wall of the cage assembly; the first raceway and the second raceway are arranged alternately along the circumference of the cage shell.

[0044] The positioning protrusion includes a first positioning protrusion and a second positioning protrusion; the first positioning protrusion and the second positioning protrusion are spaced apart circumferentially along the positioning disk; at the first set position, the first positioning protrusion extends to the first raceway and the second positioning protrusion extends to the second raceway.

[0045] To address the problem of high scrap rates during precision machining of the outer circumference of the ball cage, this invention offers the following advantages:

[0046] One open end of the ball cage assembly abuts against the positioning unit, laying the foundation for subsequent raceway positioning. This utilizes the ball cage's own raceway as a positioning carrier, achieving precise positioning through the engagement of the positioning protrusion with the raceway. Further adjustment of the ball cage's orientation ensures that the limiting protrusion of the limiting post accurately embeds into the raceway in subsequent steps, preventing misalignment between the raceway and the limiting protrusion, which could lead to installation failure or damage to the raceway caused by forced installation. Rotating the limiting post to the second predetermined position ensures its engagement with the raceway. The ball cage is then transferred from the positioning unit to the limiting post; the secondary engagement of the limiting protrusion with the raceway provides internal support and positions the ball cage assembly.

[0047] This axial clamping method achieves axial positioning of the ball cage assembly and enhances the internal fit between the limiting post and the ball cage. The rotational power of the limiting post is transmitted from the limiting protrusion to the ball cage assembly. This avoids sliding friction during ball cage assembly rotation. Compared to using an outer ring clamping structure to drive the ball cage assembly rotation, this method ensures that the ball cage assembly rotation speed matches the limiting post rotation speed, maintains stable posture during ball cage rotation, and prevents slippage between the ball cage assembly and the outer ring clamping structure during high-speed rotation. This ensures machining accuracy during subsequent machining of the outer circumferential surface of the ball cage assembly in the machining unit. Attached Figure Description

[0048] Figure 1 A flowchart illustrating a method for fabricating a ball cage assembly according to one embodiment;

[0049] Figure 2 This is a schematic diagram of the structure of a ball cage assembly processing system according to one embodiment;

[0050] Figure 3 for Figure 2 A structural diagram of the conveying component, positioning component, and handling component;

[0051] Figure 4 for Figure 3 Schematic diagram of the structure of the conveying component and the positioning component;

[0052] Figure 5 for Figure 3 Schematic diagram of the middle clamping unit;

[0053] Figure 6 for Figure 4 A schematic diagram of the positioning unit in the middle;

[0054] Figure 7 for Figure 5 A structural schematic diagram of the positioning unit from another perspective;

[0055] Figure 8 for Figure 2 Schematic diagram of the limiting unit;

[0056] Figure 9 for Figure 2 Schematic diagram of the middle clamping unit;

[0057] Figure 10 for Figure 2 Schematic diagram of the structure of the ball cage assembly;

[0058] Figure 11 for Figure 10 Another structural schematic diagram of the middle ball cage assembly;

[0059] Figure 12 for Figure 10 Another structural schematic diagram of the ball cage assembly.

[0060] Figure label:

[0061] 10. Conveying assembly; 11. Conveying bracket; 12. Fourth drive unit; 13. Conveyor belt; 20. Positioning assembly; 21. Housing unit; 211. Positioning bracket; 212. Housing body; 22. Positioning unit; 221. First drive unit; 222. Positioning disk; 223. Positioning protrusion; 2231. First positioning protrusion; 2232. Second positioning protrusion; 224. Sensor; 30. Handling assembly; 31. First translation part; 32. Second translation part; 33. Vertical translation part; 34. Clamping unit; 341. Tilting part; 342. Clamping seat; 343, Fifth drive unit; 344, Gripper; 35, Transport frame; 40, Machining assembly; 41, Machining machine table; 42, Limiting unit; 421, Second drive unit; 422, Limiting post; 423, Limiting protrusion; 43, Tightening unit; 431, Tightening seat; 432, Ejector pin; 44, Machining unit; 441, Machining section; 442, Third drive unit; 50, Ball cage assembly; 51, Ball cage unit; 511, Ball cage shell; 512, Raceway; 5121, First raceway; 5122, Second raceway; 52, Shaft unit. Detailed Implementation

[0062] 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.

[0063] 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.

[0064] In precision machining processes such as CNC milling, high-precision grinding, and hard turning of the outer circumference of a ball cage, to ensure machining efficiency and surface accuracy, the ball cage needs to be driven to rotate at high speed around its own axis, while a clamping device is required to reliably position and fix the ball cage. However, if a traditional rigid clamping device is used to apply a large clamping force, although it can suppress centrifugal displacement during high-speed rotation to a certain extent and ensure clamping stability, excessive clamping force can easily cause local plastic deformation or stress concentration in the thin-walled part of the ball cage, resulting in out-of-tolerance roundness error, uneven wall thickness, and even damage to the preset 512 curvature of the raceway. If the clamping force is reduced to avoid deformation, the radial runout of the ball cage will be aggravated due to centrifugal force under high-speed rotation conditions, which not only results in a high surface roughness but may also cause relative slippage between the fixture and the ball cage, causing the machining dimensions to deviate from the design requirements, thus resulting in a high scrap rate.

[0065] Example 1:

[0066] This application proposes a method for processing ball cage components, such as... Figure 1 As shown, it includes steps S10 to S70.

[0067] Step S10: Based on the processing command trigger, the open end of the ball cage assembly 50 abuts against the positioning unit 22. This lays the foundation for the subsequent positioning of the raceway 512.

[0068] Step S20: Drive the positioning unit 22 to rotate, so that the positioning protrusion 223 of the positioning unit 22 extends into the raceway 512 of the ball cage assembly 50. In this way, the raceway 512 of the ball cage assembly 50 itself is used as a positioning carrier, and precise positioning is achieved by the engagement of the positioning protrusion 223 with the raceway 512.

[0069] Step S30: Drive the positioning unit 22 to rotate so that the ball cage assembly 50 rotates to the first set position. By adjusting the posture of the ball cage assembly 50, it can be ensured that the limiting protrusion 423 of the limiting post 422 can be accurately embedded in the raceway 512 in subsequent steps, avoiding failure of fitting due to misalignment between the raceway 512 and the limiting protrusion 423 or damage to the raceway 512 caused by forced fitting.

[0070] Step S40: Drive the limiting post 422 to rotate to the second set position, transport the ball cage assembly 50 and fit it onto the outer periphery of the limiting post 422. The limiting protrusion 423 connected to the limiting post 422 extends into the raceway 512. Rotating the limiting post 422 to the second set position ensures that the limiting post 422 can engage with the raceway 512. Then, the ball cage assembly 50 is transferred from the positioning unit 22 to the limiting post 422. The secondary engagement of the limiting protrusion 423 with the raceway 512 provides internal support and positioning for the ball cage assembly 50.

[0071] Step S50: Drive the clamping unit 43 to abut against the end of the ball cage assembly 50 away from the limiting post 422, so that one end of the limiting post 422 abuts against the internal space of the ball cage assembly 50. In this way, the axial positioning of the ball cage assembly 50 is achieved through axial clamping, and the fit between the limiting post 422 and the internal space of the ball cage assembly 50 is strengthened.

[0072] Step S60: By driving the limiting post 422 to rotate, the limiting protrusion 423 drives the ball cage assembly 50 to rotate. The rotational power is transmitted from the limiting post 422 to the limiting protrusion 423, and then to the ball cage assembly 50. This avoids sliding friction when the ball cage assembly 50 rotates. Compared with setting an outer ring clamping structure to drive the ball cage assembly 50 to rotate, this ensures that the rotational speed of the ball cage assembly 50 is consistent with the rotational speed of the limiting post 422, ensures the stability of the ball cage assembly 50's posture during rotation, and avoids slippage between the ball cage assembly 50 and the outer ring clamping structure during high-speed rotation. This ensures the machining accuracy when the outer peripheral surface of the ball cage assembly 50 is machined in the subsequent machining unit 44.

[0073] Step S70: The processing unit 44 abuts against the outer peripheral surface of the ball cage assembly 50 and performs processing. Since the limiting post 422 and the limiting protrusion 423 are supported inside the ball cage assembly 50 and drive the ball cage assembly 50 to rotate, and there are no external clamping structures obstructing the outer peripheral surface of the ball cage assembly 50, the processing unit 44 can achieve full peripheral surface coverage processing, avoiding processing blind spots caused by traditional clamping. Furthermore, since there is no clamping force causing deformation of the outer peripheral surface of the ball cage assembly 50, the processed ball cage assembly 50 does not require correction, thus improving the processing efficiency of the ball cage assembly 50 and reducing the scrap rate.

[0074] Furthermore, in step S20, the rotation of the positioning unit 22 is a reciprocating rotation within a set angle. When the positioning unit 22 reverses direction, the direction of the frictional force generated with the ball cage assembly 50 changes. Due to inertia, the ball cage assembly 50 has a larger relative displacement with the positioning unit 22. Compared with the positioning unit 22 rotating in a fixed direction, this makes it easier for the positioning protrusion 223 to extend into the raceway 512, thereby improving the positioning efficiency.

[0075] Furthermore, the ball cage assembly 50 includes a ball cage unit 51; the ball cage unit 51 includes a ball cage shell 511 and a plurality of raceways 512; the raceways 512 are recessed into the inner peripheral wall of the ball cage shell 511.

[0076] Step S10 includes steps S11 and S12.

[0077] Step S11: Based on the processing command trigger, acquire the tilt data of raceway 512. The tilt data includes the tilt direction along the circumference of the ball cage shell 511 in the direction from the opening of the ball cage assembly 50 to the bottom wall of the ball cage assembly 50. The tilt data of raceway 512 includes a first tilt state and a second tilt state.

[0078] Step S12: Based on the obtained tilt data of the raceway 512, the open end of the ball cage assembly 50 is brought into contact with the positioning unit 22. The tilt direction of the raceway 512 directly determines the force angle and rotation speed of the inner wall of the raceway 512. If the tilt data is not obtained and positioning is performed directly, it may cause axial or radial movement of the ball cage assembly 50 during subsequent processing, thereby affecting the processing effect.

[0079] Step S60 includes steps S61 and S62.

[0080] Step S61: Based on the tilt data, drive the limiting post 422 to rotate along a set direction. The set direction includes the first circumferential direction of the sphere cage 511 and the second circumferential direction of the sphere cage 511.

[0081] Step S62: The rotation of the limiting post 422 drives the limiting protrusion 423 to rotate the ball cage assembly 50. Based on the tilt data, the rotation direction of the limiting post 422 is specifically selected, which can control the direction of the axial force brought by the limiting protrusion 423 abutting against the inner wall of the raceway 512, thereby making the ball cage assembly 50 more stable when rotating, and facilitating the machining component 40 to process the outer peripheral wall of the ball cage assembly 50.

[0082] Further, step S61 includes step S611.

[0083] Step S611: Based on the tilt data of all raceways 512 as the first tilt state, drive the limiting post 422 to rotate along the second circumferential direction of the circumference of the ball cage shell 511; wherein, the first tilt state is that the raceway 512 is tilted along the first circumferential direction of the circumference of the ball cage shell 511 in the direction from the opening of the ball cage assembly 50 to the bottom wall of the ball cage assembly 50. In this way, when the limiting protrusion 423 abuts against the inner wall of the raceway 512, the axial force generated pushes the ball cage assembly 50 outward. Thus, when the clamping unit 43 is clamped at the end of the ball cage assembly 50 away from the opening of the ball cage, the axial force generated, together with the clamping unit 43, can prevent the ball cage assembly 50 from axially moving, thereby making the ball cage assembly 50 more stable when rotating, and facilitating the processing component 40 to process the outer circumferential wall of the ball cage assembly 50.

[0084] Further, step S61 includes step S612.

[0085] Step S612: Based on the tilt data of all raceways 512 being in the second tilt state, drive the limiting post 422 to rotate along the first circumferential direction of the circumference of the ball cage shell 511; wherein, the second tilt state is that the raceway 512 is tilted along the second circumferential direction of the circumference of the ball cage shell 511 in the direction from the opening of the ball cage assembly 50 to the bottom wall of the ball cage assembly 50. In this way, when the limiting protrusion 423 abuts against the inner wall of the raceway 512, the axial force generated pushes the ball cage assembly 50 outward. Thus, when the clamping unit 43 is clamped at the end of the ball cage assembly 50 away from the opening of the ball cage, the axial force generated, together with the clamping unit 43, can prevent the ball cage assembly 50 from axially moving, thereby making the ball cage assembly 50 more stable when rotating, and facilitating the machining component 40 to process the outer circumferential wall of the ball cage assembly 50.

[0086] Furthermore, part of the raceway 512 is inclined along the first circumferential direction of the circumference of the ball cage shell 511 in the direction from the opening of the ball cage assembly 50 to the bottom wall of the ball cage assembly 50; another part of the raceway 512 is inclined along the second circumferential direction of the circumference of the ball cage shell 511 in the direction from the opening of the ball cage assembly 50 to the bottom wall of the ball cage assembly 50. The first circumferential direction and the second circumferential direction are opposite. In the application of the ball cage shell 511, a ball is simultaneously mounted on the first raceway 5121 and the second raceway 5122. The opposing first raceway 5121 and the second raceway 5122 allow the ball to be in contact with the corresponding raceway 512 in both forward and reverse directions, distributing the single-point force to the two raceways 512, achieving uniform torque distribution, and avoiding local overload. This is the basic structural design logic of constant velocity transmission. Moreover, by guiding the displacement of the steel ball in both directions, the movement space of the steel ball can be expanded, the compensation range of the shaft angle can be improved, and constant velocity transmission can still be maintained under large-angle conditions such as steering and bumps.

[0087] Step S61 includes step S613.

[0088] Step S613: Based on the inclination data of the raceway 512 where the limiting protrusion 423 is located as the first inclination state, drive the limiting post 422 to rotate in the second circumferential direction along the circumference of the ball cage shell 511; or, based on the inclination data of the raceway 512 where the limiting protrusion 423 is located as the second inclination state, drive the limiting post 422 to rotate in the first circumferential direction along the circumference of the ball cage shell 511.

[0089] Regardless of whether the inclination data of the raceway 512 where the limiting protrusion 423 is located is in the first inclination state or the second inclination state, the axial force generated when the limiting protrusion 423 abuts against the inner wall of the raceway 512 pushes the ball cage assembly 50 outward. When the clamping unit 43 is clamped at the end of the ball cage assembly 50 away from the ball cage opening, the axial force generated, together with the clamping unit 43, can prevent the ball cage assembly 50 from axially moving, thereby making the ball cage assembly 50 more stable when rotating, and facilitating the processing component 40 to process the outer peripheral wall of the ball cage assembly 50.

[0090] Furthermore, the raceway 512 includes a first raceway 5121 and a second raceway 5122; the first raceway 5121 is inclined in a first circumferential direction along the circumference of the cage shell 511 in the direction from the opening of the cage assembly 50 to the bottom wall of the cage assembly 50; the second raceway 5122 is inclined in a second circumferential direction along the circumference of the cage shell 511 in the direction from the opening of the cage assembly 50 to the bottom wall of the cage assembly 50.

[0091] The first raceway 5121 and the second raceway 5122 are arranged alternately along the circumference of the ball cage shell 511. In a designated plane, the distance between the center point of one first raceway 5121 and the center point of an adjacent second raceway 5122 is L1, and the distance between the center point of one first raceway 5121 and the center point of another adjacent second raceway 5122 is L2; ​​L1 > L2. Although the first raceway 5121 and the second raceway 5122 are arranged alternately along the circumference of the ball cage shell 511, the spacing between two adjacent second raceways 5122 of the same first raceway 5121 differs. The designated plane is a plane perpendicular to the central axis of the ball cage shell 511.

[0092] The positioning protrusion 223 includes a first positioning protrusion 2231 and a second positioning protrusion 2232; the distance between at least one adjacent first positioning protrusion 2231 and second positioning protrusion 2232 is K1, or the distance between at least one adjacent first positioning protrusion 2231 and second positioning protrusion 2232 is K2; K1 > K2.

[0093] By setting the first positioning protrusion 2231 and the second positioning protrusion 2232 with different spacings, when the spacing between the first positioning protrusion 2231 and the second positioning protrusion 2232 is K1, the first positioning protrusion 2231 and the second positioning protrusion 2232 can be embedded in the first raceway 5121 and the second raceway 5122 with a spacing of L1; when the spacing between the first positioning protrusion 2231 and the second positioning protrusion 2232 is K2, the first positioning protrusion 2231 and the second positioning protrusion 2232 can be embedded in the first raceway 5121 and the second raceway 5122 with a spacing of L2. Furthermore, the first positioning protrusion 2231 and the second positioning protrusion 2232 are embedded in the first raceway 5121 and the second raceway 5122 in opposite directions. When the positioning disk 222 rotates, the axial force generated by the first positioning protrusion 2231 and the first raceway 5121 abutting is opposite to the axial force generated by the second positioning protrusion 2232 and the second raceway 5122 abutting. This can prevent the positioning protrusion 223 from being embedded in the raceway 512 and the ball cage assembly 50 from rotating relative to the positioning disk 222.

[0094] Step S20 includes steps S21 and S22.

[0095] Step S21: Drive the positioning unit 22 to rotate. Based on the distance K1 between two adjacent first positioning protrusions 2231 and second positioning protrusions 2232, the first positioning protrusion 2231 extends into the first raceway 5121, and the second positioning protrusion 2232 extends into the second raceway 5122, which is spaced L1 from the first raceway 5121 containing the first positioning protrusion 2231. The first positioning protrusion 2231 and second positioning protrusion 2232 with a distance of K1 synchronously engage with the first raceway 5121 and second raceway 5122 with a distance of L1, forming a double-protrusion cooperative support structure. During rotational adjustment, torque is transmitted to the raceway 512 simultaneously through the two protrusions, which can avoid torsion caused by single-point force. At the same time, the position of the first raceway 5121 or the second raceway 5122 can be determined by the position of the first positioning protrusion 2231 and the second positioning protrusion 2232. Subsequently, by rotating the positioning disk 222 to adjust the position of the first positioning protrusion 2231 or the second positioning protrusion 2232, the ball cage assembly 50 can be rotated to the first set position.

[0096] Step S22: Drive the positioning unit 22 to rotate. Based on the distance K2 between two adjacent first positioning protrusions 2231 and second positioning protrusions 2232, the first positioning protrusion 2231 extends into the first raceway 5121, and the second positioning protrusion 2232 extends into the second raceway 5122, which is spaced L2 from the first raceway 5121 containing the first positioning protrusion 2231. The first positioning protrusion 2231 and second positioning protrusion 2232 with a distance of K2 synchronously engage with the first raceway 5121 and second raceway 5122 with a distance of L2, forming a double-protrusion cooperative support structure. During rotational adjustment, torque is transmitted to the raceway 512 simultaneously through the two protrusions, which can avoid torsion caused by single-point force. At the same time, the position of the first raceway 5121 or the second raceway 5122 can be determined by the position of the first positioning protrusion 2231 and the second positioning protrusion 2232. Subsequently, by rotating the positioning disk 222 to adjust the position of the first positioning protrusion 2231 or the second positioning protrusion 2232, the ball cage assembly 50 can be rotated to the first set position.

[0097] Furthermore, in step S70, at the contact point between the machining unit 44 and the ball cage assembly 50, the linear velocity of the machining unit 44 relative to the ball cage assembly 50 is downward. When the linear velocity is upward, the waste chips generated during grinding or cutting are subjected to the upward motion force, easily splashing and falling back onto the already machined outer peripheral surface of the ball cage assembly 50, causing the waste chips to scratch the outer peripheral surface of the ball cage assembly 50. By ensuring that the linear velocity of the contact point between the machining unit 44 and the ball cage assembly 50 is downward relative to the contact point between the ball cage assembly 50 and the machining unit 44, scratching the outer surface of the ball cage assembly 50 when the waste chips fall can be avoided.

[0098] Further, step S40 includes: steps S41-S43.

[0099] Step S41: The ball cage assembly 50 at the first set position is lifted by the transport component 30 until it is separated from the positioning unit 22; at the first set position, at least one positioning protrusion 223 is located directly above or directly below the projection of the rotation axis of the limiting post 422. The ball cage assembly 50 needs to be rotated by the limiting post 422 and the limiting protrusion 423 for subsequent processing. In this way, during the subsequent transport process, only the ball cage unit 51 needs to be translated to fit the ball cage unit 51 onto the limiting post 422, so that the central axis of the ball cage assembly 50 is aligned with the rotation axis of the limiting post 422.

[0100] Step S42: By lifting and translating the ball cage assembly 50 using the transport component 30, the ball cage assembly 50 is rotated so that its opening faces the limiting post 422, driving the limiting post 422 to rotate to the second set position; in the second set position, the limiting protrusion 423 is located directly above the limiting post 422. The ball cage assembly 50 opening towards the limiting post 422 not only ensures alignment but also guarantees that the axis of the ball cage assembly 50 is aligned with the rotation axis of the limiting post 422. This ensures that during subsequent rotation, the limiting protrusion 423 can evenly transmit torque to the ball cage assembly 50, guaranteeing the stability of subsequent processing.

[0101] Step S43: The transport assembly 30 translates the ball cage assembly 50 along the rotation axis of the limiting post 422 until it is fitted onto the outer periphery of the limiting post. The limiting protrusion 423, connected to the limiting post 422, extends into the raceway 512. Since steps S41 and S42 have ensured the coaxiality of the rotation axes of the ball cage assembly 50 and the limiting post 422, the limiting protrusion can directly extend into the raceway 512 during translation along the rotation axis, eliminating the need for further positioning steps. This avoids radial friction between the inner wall of the ball cage assembly 50 and the outer periphery of the limiting post 422, and ensures smooth power transmission during subsequent rotation.

[0102] Example 2:

[0103] This embodiment proposes a ball cage assembly processing system; the ball cage assembly processing system is applied to any of the ball cage assembly processing methods in Embodiment 1. For example... Figure 2 As shown, the ball cage assembly processing system includes a ball cage assembly 50, a positioning unit 22, and a processing component 40.

[0104] The ball cage assembly 50 includes a ball cage unit 51; the ball cage unit 51 includes a ball cage shell 511 and a raceway 512; the raceway 512 is recessed in the inner peripheral wall of the ball cage shell 511; the raceway 512 passes through one open end of the ball cage shell 511.

[0105] The positioning unit 22 includes a positioning disk 222 and a positioning protrusion 223. The positioning protrusion 223 is connected to the outer peripheral wall of the positioning disk 222. The outer diameter of the positioning disk 222 is smaller than the inner diameter of the ball cage shell 511. The shape of the positioning protrusion 223 is adapted to the shape of the raceway 512. The smaller outer diameter of the positioning disk 222 means that the positioning unit 22 extends into the ball cage shell 511. When the positioning disk 222 rotates relative to the ball cage shell 511, the positioning protrusion 223 can be inserted into the raceway 512 from its opening. Thus, by using the raceway 512 of the ball cage itself as a positioning carrier, precise positioning is achieved through the engagement of the positioning protrusion 223 and the raceway 512.

[0106] The processing assembly 40 includes a processing machine base 41, a processing unit 44, a clamping unit 43, and a limiting unit 42. The limiting unit 42 includes a limiting post 422 and a limiting protrusion 423. The limiting post 422 is rotatably connected to the processing machine base 41. The outer diameter of the limiting post 422 is smaller than the inner diameter of the ball cage shell 511. The shape of the limiting protrusion 423 is adapted to the shape of the raceway 512. The clamping unit 43 is movably connected to the processing machine base 41, and the direction of movement of the clamping unit 43 coincides with the axis of the limiting post 422. The processing unit 44 is movably connected to the processing machine base 41. When the ball cage shell 511 is fitted onto the limiting post 422, the limiting protrusion 423 can extend into the raceway 512, and the limiting protrusion 423 supports the ball cage shell 511. When the limiting post 422 rotates, the limiting protrusion 423 abuts against the raceway 512, causing the ball cage shell 511 to rotate together. The ball cage assembly 50 is then axially positioned by the clamping unit 43 through axial clamping, which also enhances the fit between the limiting post 422 and the ball cage assembly 50. Since the limiting post 422 and the limiting protrusion 423 are supported inside the ball cage assembly 50 and drive the ball cage assembly 50 to rotate, the outer circumferential surface of the ball cage assembly 50 is unobstructed by any external clamping structure. The processing unit 44 can achieve full circumferential surface coverage processing, avoiding processing blind spots caused by traditional clamping. Furthermore, since there is no clamping force that would cause deformation of the outer circumferential surface of the ball cage assembly 50, the processed ball cage assembly 50 does not require correction, thus improving processing efficiency and reducing the scrap rate.

[0107] Furthermore, such as Figure 11 and Figure 12As shown, the raceway 512 includes a first raceway 5121 and a second raceway 5122. The first raceway 5121 is inclined along the first circumferential direction of the circumference of the ball cage shell 511 in the direction from the opening of the ball cage assembly 50 to the bottom wall of the ball cage assembly 50. The second raceway 5122 is inclined along the second circumferential direction of the circumference of the ball cage shell 511 in the direction from the opening of the ball cage assembly 50 to the bottom wall of the ball cage assembly 50. The first raceway 5121 and the second raceway 5122 are arranged alternately along the circumference of the ball cage shell 511. In the application of the ball cage shell 511, a ball is simultaneously mounted on the first raceway 5121 and the second raceway 5122. The opposing first raceway 5121 and the second raceway 5122 allow the ball to be in contact with the corresponding raceway 512 in both directions during forward and reverse rotation, distributing the single-point force to the two raceways 512, achieving uniform torque distribution, and avoiding local overload. This is the basic structural design logic of constant velocity transmission. Furthermore, by guiding the displacement of the steel balls in both directions, the movement space of the steel balls can be expanded, the compensation range of the shaft angle can be increased, and constant speed transmission can still be maintained under large-angle working conditions such as turning and bumping.

[0108] In other embodiments, such as Figure 12 As shown, in the set plane, the distance between the center point of one of the first raceways 5121 and the center point of the adjacent second raceway 5122 is L1, and the distance between the center point of the adjacent second raceway 5122 and the center point of the adjacent second raceway 5122 is L2, and L1 > L2.

[0109] Furthermore, such as Figure 7 As shown, the positioning protrusion 223 includes a first positioning protrusion 2231 and a second positioning protrusion 2232; the first positioning protrusion 2231 and the second positioning protrusion 2232 are spaced apart circumferentially along the positioning disk 222; at a first set position, the first positioning protrusion 2231 extends to the first raceway 5121, and the second positioning protrusion 2232 extends to the second raceway 5122. The first positioning protrusion 2231 and the second positioning protrusion 2232 respectively extend into the first raceway 5121 and the second raceway 5122 with opposite inclination directions, forming a double-protrusion cooperative support structure. During rotational adjustment, torque is transmitted to the raceway 512 simultaneously through the two protrusions, which can avoid torsion caused by single-point force. Simultaneously, the position of the first raceway 5121 or the second raceway 5122 can be determined by the position of the first positioning protrusion 2231 or the second positioning protrusion 2232. Subsequently, by rotating the positioning disk 222 to adjust the position of the first positioning protrusion 2231 or the second positioning protrusion 2232, the position of the ball cage assembly 50 can be adjusted, thereby determining the position of the raceway 512 when the ball cage assembly 50 is subsequently transported or processed.

[0110] In other embodiments, such as Figure 7As shown, the positioning protrusion 223 includes a first positioning protrusion 2231 and a second positioning protrusion 2232. The positioning protrusion 223 includes a first positioning protrusion 2231 and a second positioning protrusion 2232. At least one adjacent first positioning protrusion 2231 and second positioning protrusion 2232 are at a distance of K1, or at least one adjacent first positioning protrusion 2231 and second positioning protrusion 2232 are at a distance of K2, and K1 > K2.

[0111] In other embodiments, such as Figure 4 As shown, the ball cage assembly processing system includes a conveying assembly 10; the conveying assembly 10 includes a conveying bracket 11, a fourth drive unit 12, and a conveyor belt 13. The conveyor belt 13 is movably connected to the conveying bracket 11 and is drivenly connected to the fourth drive unit 12. The conveyor belt 13 is used to convey the ball cage assembly 50 to be positioned in the direction of approach to the positioning.

[0112] In other embodiments, such as Figure 4 As shown, the ball cage assembly processing system includes a positioning component 20; the positioning component 20 includes a housing unit 21 and a positioning unit 22; the housing unit 21 includes a positioning bracket 211 and a housing body 212. Figure 6 As shown, the positioning unit 22 includes a first drive unit 221 and a sensor 224; the positioning bracket 211 is connected to the conveying bracket 11, and the positioning disk 222 is rotatably connected to the positioning bracket 211; the inner diameter of the outer shell 212 is larger than that of the ball cage shell 511, and it is fitted onto the outer periphery of the positioning disk 222; when the ball cage shell 511 abuts against the positioning unit 22, the outer shell 212 restricts the radial displacement of the ball cage shell 511 relative to the positioning unit 22, thereby preventing the ball cage shell 511 from detaching from the positioning unit 22. The first drive unit 221 drives the positioning disk 222 and the positioning protrusion 223 to rotate, thereby causing the ball cage shell 511 to rotate, and the sensor 224 is used to detect whether the ball cage shell 511 has rotated to the first position.

[0113] In other embodiments, such as Figure 8 As shown, the limiting unit 42 includes a second driving part 421; the second driving part 421 is connected to the processing table 41; and the limiting post 422 is drivenly connected to the second driving part 421.

[0114] In other embodiments, such as Figure 9 As shown, the clamping unit 43 includes a clamping seat 431 and an ejector pin 432; the clamping seat 431 is movably connected to the processing table 41; the ejector pin 432 is drivenly connected to the clamping seat 431.

[0115] In other embodiments, such as Figure 1 As shown, the processing unit 44 includes a processing section 441 and a third drive section 442; the third drive section 442 is connected to the processing machine table 41; the processing section 441 and the third drive section 442 are drivenly connected.

[0116] In other embodiments, such as Figure 3 As shown, the ball cage assembly processing system includes a transport assembly 30; the transport assembly 30 includes a transport frame 35, a first translation section 31, a second translation section 32, a vertical translation section 33, and a clamping unit 34. Figure 5 As shown, the clamping unit 34 includes a flipping part 341, a clamping seat 342, a fifth drive part 343, and a gripper 344. The first translation part 31 is movably connected to the transport frame 35 along the x-axis; the second translation part 32 is movably connected to the first translation part 31 along the y-axis; and the vertical translation part 33 is movably connected to the second translation part 32 along the z-axis. The flipping part 341 and the vertical translation part 33 are rotatably connected, and the clamping seat 342 is connected to the flipping part 341; the fifth drive part 343 is connected to the clamping seat 342; and the gripper 344 is movably connected to the fifth drive part 343. The fifth drive part 343 drives the gripper 344 to clamp or release the ball cage unit 51. Through the movement of the first translation part 31, the second translation part 32, and the vertical translation part 33, the gripper 344 transports the ball cage unit 51 to be positioned from the conveyor belt 13 to the positioning unit 22. Then, with the rotation of the flipping part 341, the positioned ball cage unit 51 is transported from the positioning unit 22 to the limit post 422.

[0117] In other embodiments, such as Figure 10 As shown, the ball cage assembly 50 includes a ball cage unit 51 and a shaft unit 52; the shaft unit 52 is connected to the end of the ball cage shell 511 away from the opening. The processing unit 44 can process the outer peripheral surface of the ball cage shell 511 and the outer peripheral surface of the shaft unit 52.

[0118] 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 method for processing a ball cage assembly, characterized in that, The method for processing the ball cage assembly includes: Triggered by a processing command, the open end of the ball cage assembly abuts against the positioning unit; Drive the positioning unit to rotate, so that the positioning protrusion of the positioning unit extends into the raceway of the ball cage assembly; Drive the positioning unit to rotate, causing the ball cage assembly to rotate to a first predetermined position; The driving limit post is rotated to the second set position, and the ball cage assembly is transported and sleeved on the outer periphery of the limit post; wherein, the limiting protrusion connected to the limit post extends into the raceway; The drive clamping unit abuts against the end of the ball cage assembly away from the limiting post, so that the end of the limiting post abuts against the internal space of the ball cage assembly; By driving the limiting post to rotate, the limiting protrusion drives the ball cage assembly to rotate; The processing unit abuts against the outer peripheral surface of the ball cage assembly and performs processing; The ball cage assembly processing system applied to the ball cage assembly processing method includes: A ball cage assembly includes a ball cage unit; the ball cage unit includes a ball cage shell and raceways; the raceways are recessed in the inner circumferential wall of the ball cage shell; the raceways pass through one open end of the ball cage shell; the raceways include a first raceway and a second raceway; the first raceway is inclined along a first circumferential direction of the circumference of the ball cage shell in the direction from the open end of the ball cage assembly to the bottom wall of the ball cage assembly; the second raceway is inclined along a second circumferential direction of the circumference of the ball cage shell in the direction from the open end of the ball cage assembly to the bottom wall of the ball cage assembly; the first raceway and the second raceway are arranged alternately along the circumference of the ball cage shell. A positioning unit includes a positioning disk and a positioning protrusion; the positioning protrusion is connected to the outer peripheral wall of the positioning disk; the outer diameter of the positioning disk is smaller than the inner diameter of the ball cage shell; the shape of the positioning protrusion is adapted to the shape of the raceway; the positioning protrusion includes a first positioning protrusion and a second positioning protrusion; the first positioning protrusion and the second positioning protrusion are spaced apart circumferentially along the positioning disk; at a first predetermined position, the first positioning protrusion extends to the first raceway, and the second positioning protrusion extends to the second raceway; The processing assembly includes a processing machine, a processing unit, a clamping unit, and a limiting unit; the limiting unit includes a limiting post and a limiting protrusion; the limiting post is rotatably connected to the processing machine; the outer diameter of the limiting post is smaller than the inner diameter of the ball cage shell; the shape of the limiting protrusion is adapted to the shape of the raceway; the clamping unit is movably connected to the processing machine, and the direction of movement of the clamping unit coincides with the axis of the limiting post; the processing unit is movably connected to the processing machine.

2. The method for processing a ball cage assembly according to claim 1, characterized in that, The positioning unit is driven to rotate, causing the positioning protrusion of the positioning unit to extend into the raceway of the ball cage assembly: The rotation of the positioning unit is a reciprocating rotation within a set angle.

3. The method for processing a ball cage assembly according to claim 1, characterized in that, The ball cage assembly includes a ball cage unit; the ball cage unit includes a ball cage shell and a plurality of said raceways; the raceways are recessed into the inner peripheral wall of the ball cage shell; The step of triggering a machining command to bring one open end of the ball cage assembly abutting against the positioning unit includes: Based on the processing command trigger, the raceway tilt data is acquired; wherein, the tilt data includes the tilt direction along the circumference of the ball cage shell in the direction from the opening of the ball cage assembly to the bottom wall of the ball cage assembly. Based on the acquired raceway tilt data, the open end of the ball cage assembly is brought into contact with the positioning unit; The step of driving the limiting post to rotate, and the limiting protrusion driving the ball cage assembly to rotate, includes: Based on the tilt data, the limiting column is driven to rotate in a set direction; The rotation of the limiting post drives the limiting protrusion to rotate the ball cage assembly.

4. The method for processing a ball cage assembly according to claim 3, characterized in that, The step of driving the limiting post to rotate along a set direction based on the tilt data includes: Based on the tilt data of all the raceways as a first tilt state, the limiting post is driven to rotate along the second circumferential direction of the circumference of the ball cage shell; wherein, the first tilt state is that the raceway is tilted along the first circumferential direction of the circumference of the ball cage shell in the direction from the opening of the ball cage assembly to the bottom wall of the ball cage assembly.

5. A method for processing a ball cage assembly according to claim 3, characterized in that, The step of driving the limiting post to rotate along a set direction based on the tilt data includes: Based on the tilt data of all the raceways being in a second tilt state, the limiting post is driven to rotate in the first circumferential direction of the circumference of the ball cage shell; wherein, the second tilt state is that the raceway is tilted in the second circumferential direction of the circumference of the ball cage shell in the direction from the opening of the ball cage assembly to the bottom wall of the ball cage assembly.

6. A method for processing a ball cage assembly according to claim 3, characterized in that, Part of the raceway is inclined in the first circumferential direction of the circumference of the ball cage shell in the direction from the opening of the ball cage assembly to the bottom wall of the ball cage assembly; another part of the raceway is inclined in the second circumferential direction of the circumference of the ball cage shell in the direction from the opening of the ball cage assembly to the bottom wall of the ball cage assembly. The first circumferential direction and the second circumferential direction are opposite; Based on the tilt data, driving the limiting post to rotate along a set direction includes: Based on the inclination data of the raceway where the limiting protrusion is located being in a first inclination state, the limiting post is driven to rotate in the second circumferential direction of the circumference of the ball cage shell; or, based on the inclination data of the raceway where the limiting protrusion is located being in a second inclination state, the limiting post is driven to rotate in the first circumferential direction of the circumference of the ball cage shell.

7. A method for processing a ball cage assembly according to claim 6, characterized in that, The raceway includes a first raceway and a second raceway; the first raceway is inclined along a first circumferential direction of the circumference of the ball cage shell in the direction from the opening of the ball cage assembly to the bottom wall of the ball cage assembly; the second raceway is inclined along a second circumferential direction of the circumference of the ball cage shell in the direction from the opening of the ball cage assembly to the bottom wall of the ball cage assembly; the first raceway and the second raceway are arranged alternately and at intervals along the circumference of the ball cage shell; in a defined plane, the distance between the center point of one of the first raceways and the center point of an adjacent second raceway is L1, and the distance between the center point of one of the first raceways and the center point of another adjacent second raceway is L2; ​​L1 > L2; The positioning protrusion includes a first positioning protrusion and a second positioning protrusion; at least one adjacent first positioning protrusion and second positioning protrusion are at a distance of K1, or at least one adjacent first positioning protrusion and second positioning protrusion are at a distance of K2. K1 > K2; The step of driving the positioning unit to rotate, causing the positioning protrusion of the positioning unit to extend into the raceway of the ball cage assembly, includes: The positioning unit is driven to rotate. Based on two adjacent first positioning protrusions and second positioning protrusions as K1, the first positioning protrusion extends into the first raceway, and the second positioning protrusion extends into the second raceway with a distance of L1 from the first raceway where the first positioning protrusion is located. The positioning unit is driven to rotate. Based on two adjacent first positioning protrusions and second positioning protrusions, K2, the first positioning protrusion extends into the first raceway, and the second positioning protrusion extends into the second raceway, which is L2 away from the first raceway where the first positioning protrusion is located.

8. A method for processing a ball cage assembly according to claim 1, characterized in that, The processing unit is in contact with the outer peripheral surface of the ball cage assembly and is being processed. At the contact point between the processing unit and the ball cage assembly, the linear velocity of the processing unit relative to the ball cage assembly is downward.

9. A method for processing a ball cage assembly according to claim 1, characterized in that, The drive limiting post rotates to a second predetermined position, transporting and fitting the ball cage assembly onto the outer periphery of the limiting post; wherein, the limiting protrusion connected to the limiting post extends into the raceway, including: The ball cage assembly at the first set position is lifted by the transport component to separate from the positioning unit; at the first set position, at least one of the positioning protrusions is located directly above or directly below the projection of the rotation axis of the limiting post; The ball cage assembly is raised, lowered, and translated by the transport component, and rotated so that the opening faces the limiting post, driving the limiting post to rotate to a second set position; in the second set position, the limiting protrusion is located directly above the limiting post; The ball cage assembly is translated along the rotation axis of the limiting post by the transport assembly until the ball cage assembly is fitted onto the outer periphery of the limiting post; wherein the limiting protrusion connected to the limiting post extends into the raceway.

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