Integrally-formed retainer and bearing

Abstract

The integrally-formed retainer comprises two symmetrically-arranged retainer bodies, each retainer body comprises an annular base part, and each annular base part is provided with a front side and an opposite rear side; the plurality of cantilever parts extend from the front side of the annular base part in the axial forward direction of the retainer body, and the cantilever parts are arranged along the circumference of the annular base part, so that a pocket for accommodating a ball is formed between every two adjacent cantilever parts; and the connecting part comprises connecting pieces and connecting grooves, the connecting pieces and the connecting grooves are sequentially and alternately arranged on the inner sides of the cantilever parts one by one, and the connecting pieces are inserted into the connecting grooves so that the two retainer bodies can be connected. The retainer body is integrally formed and can be connected with each other in a matched mode, and connection is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing cages, in particular to an integrally formed cage and a bearing. Background Art

[0002] A cage (i.e., a bearing cage, also known as a bearing retainer) refers to a bearing part that partially wraps all or part of the rolling elements and moves with them, used to isolate the rolling elements, and usually also guides the rolling elements and holds them in the bearing. Most of the existing cages are integral. Due to being formed by integral processing, they have the integrity of an integrated structure. Once a failure, damage occurs, or dust enters inside and needs to be replaced, the entire cage structure needs to be replaced, and it is impossible to perform separate repairs or replace parts, resulting in higher maintenance costs.

[0003] Since the split cage has detachability, designing a split cage can effectively avoid the above problems. For the existing split cages, although the detachable structure is achieved, the connection strength is relatively low. For example, in the patent application No. 202410225259.X, the patent name is a split cage and a bearing, a cage body, the cage body includes a first cage body and a second cage body; the first cage body and the second cage body are butt - connected through a connection assembly; the connection assembly includes a connecting piece and a fastening piece; the connecting pieces are arranged at intervals along the circumferential direction between the first cage body and the second cage body for connecting the first cage body and the second cage body; the fastening piece is used for locking between the connecting piece and the first cage body and the second cage body. Such a disassembly structure requires additional fastening pieces, that is, the connection requires the cage body and the fastening pieces, with many parts, and the connection and installation are inconvenient. Summary of the Utility Model

[0004] Aiming at the deficiencies in the above problems, the utility model provides an integrally formed cage.

[0005] To achieve the above object, the utility model provides an integrally formed cage, including two symmetrically arranged cage bodies, and each cage body includes:

[0006] An annular base having a front side and an opposite rear side;

[0007] A plurality of cantilever portions extending forward along the axial direction of the cage body from the front side of the annular base, and the cantilever portions are arranged along the circumference of the annular base such that a pocket for accommodating a ball is formed between two adjacent cantilever portions;

[0008] The connecting part includes a connecting piece and a connecting groove. The connecting piece and the connecting groove are alternately arranged one by one inside the cantilever part. The connecting piece is inserted into the connecting groove to connect the two cage bodies. A through groove penetrating the front and rear sides of the annular base is formed on the cantilever part provided with the connecting piece.

[0009] Wherein, the radial thickness of the annular base is greater than that of the cantilever part, and the inner wall of the pocket is a cylindrical surface extending along the radial direction of the cage body, and the diameter of the cylindrical surface gradually increases from inside to outside.

[0010] Preferably, a positioning post and a positioning hole are provided on the top surface of one cantilever part.

[0011] Preferably, oil grooves are symmetrically formed on both sides at the top end of the inner wall of the pocket, and the cylindrical surface gradually increases from bottom to top.

[0012] Preferably, an arc surface is provided at the connection between the annular base and the bottom end of the cylindrical surface.

[0013] Preferably, a conical arc structure is provided at the bottom between adjacent pockets.

[0014] Preferably, a plurality of circular grooves are provided on the cage body, and the circular grooves and the pockets are arranged at both ends of the cage body oppositely. [[ID=,19]]

[0015] Preferably, the cage body is integrally formed and the material is PA46-GF30.

[0016] Preferably, a stop block is provided at the top end of the connecting piece, and a stop groove cooperating with the stop block is correspondingly arranged at the bottom end of the connecting groove.

[0017] Preferably, an elastic deformation groove is formed on the outer side surface of the connecting piece along its height direction.

[0018] The present invention also provides a bearing, which includes an outer ring, an inner ring and balls arranged between the outer ring and the inner ring. The bearing further includes the above-mentioned cage, and the cage is used for accommodating the balls.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] The cage body of the present invention is integrally formed and can be connected to each other in a matching manner, and the connection is more convenient. Description of the Drawings

[0021] Figure 1 It is a structural diagram of the integrally formed cage body of the present invention;

[0022] Figure 2Top view of the integrally formed cage body of the present utility model;

[0023] Figure 3 Structural diagram of the integrally formed cage of the present utility model;

[0024] Figure 4 Schematic diagram of the bearing of the present utility model;

[0025] Figure 5 Cross-sectional view of the bearing of the present utility model. Description of the drawings

[0027] 1. Cage body; 11. Ring-shaped base; 12. Cantilever part; 13. Conical arc structure; 14. Circular ring-shaped groove; 2. Pocket; 22. Arc surface; 3. Connecting part; 31. Connecting piece; 32. Connecting groove; 311. Stopper; 321. Stopping groove; 33. Positioning hole; 34. Positioning post; 35. Through groove; 4. Outer ring; 5. Inner ring; 6. Ball. Detailed implementation manners

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0029] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0030] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0031] The following will further describe the present utility model in detail with reference to the accompanying drawings: Figures 1-5 The following will further describe the present utility model in detail with reference to the accompanying drawings:

[0032] Referring to Figure 1 , the present utility model provides an integrally formed cage, including two symmetrically arranged cage bodies 1. The two symmetrically arranged cage bodies 1 are integrally formed, and the material thereof is glass fiber reinforced polyimide PA46-GF30. This material has a lighter mass and lower friction performance, making it the preferred raw material to meet the requirements of high rotational speeds.

[0033] The cage body 1 includes:

[0034] An annular base 11 having a front side and an opposite rear side;

[0035] A plurality of cantilever portions 12 extending forward along the axial direction of the cage body 1 from the front side of the annular base 11. The cantilever portions 12 are arranged along the circumference of the annular base 11, such that a pocket 2 for accommodating balls is formed between two adjacent cantilever portions 12;

[0036] A connecting portion 3, which includes a connecting member 31 and a connecting groove 32. The connecting member 31 and the connecting groove 32 are alternately arranged one by one inside the cantilever portion 12 in sequence. The connecting member 31 is inserted into the connecting groove 32 to connect the two cage bodies 1;

[0037] Wherein, the radial thickness of the annular base 11 is greater than the radial thickness of the cantilever portion 12. The radial thickness of the annular base 11 being greater than the radial thickness of the cantilever portion 12 can significantly reduce or inhibit the deformation of the cage, namely the so-called umbrella effect; the inner wall of the pocket 2 is a cylindrical surface extending along the radial direction of the cage body 1, and the diameter of the cylindrical surface gradually increases from inside to outside. In this way, not only can the pocket 2 store more grease and avoid friction and wear between the balls installed in the pocket 2 and the inner wall surface of the pocket 2, but also the inner space in the pocket 2 is small and it is not easy to cause large crosstalk of the balls in the pocket 2, and the balls are effectively controlled.

[0038] Referring to Figure 2 , a positioning post 34 and a positioning hole 33 are provided on the top surface of a cantilever portion 12. The two cage bodies 1 are better positioned and connected through the positioning post 34 and the positioning hole 33. The connecting portion 3 may or may not be provided on this cantilever portion 12; of course, generally the connecting portion 3 is not provided for better positioning and installation.

[0039] Furthermore, the connecting member 31 is a rectangular block, and the connecting groove 32 is matched with the connecting member 31. In order to make the connection more firm, a stop block 311 is provided at the top end of the connecting member 31, and a stop groove 321 matched with the stop block 311 is correspondingly provided at the bottom end of the connecting groove 32. After this connection, it is more difficult for the two cage bodies 1 to separate, and the connection is more firm.

[0040] In this embodiment, an elastic deformation groove 312 is formed on the outer side of the connecting member 31 along its height direction. The highly elastic deformation groove 312 can not only reduce the weight of the retainer body 1, but also can be more easily deformed during installation and connection for easy installation.

[0041] Furthermore, a through groove is provided on the cantilever portion 12 on which the connecting member 31 is provided. This through groove not only reduces the weight of the retainer body 1, but also reduces the radial distance from the axis of the retainer body 1 to the radial outer surface of the cantilever portion 12. In other words, the smaller outer diameter of the cantilever portion 12 and the reduced material due to the presence of the through groove result in a reduction in the centrifugal force acting on the cantilever portion 12. Therefore, the retainer body 1 has the technical advantage of reduced radial outward bending, which can reduce or suppress the so-called umbrella effect. The presence of the connecting groove 32 and the retaining groove 321 also further reduces the material of the cantilever portion 12, thereby further reducing or suppressing the so-called umbrella effect. The umbrella effect is that when a point contacts a surface, when the force on the surface increases, the surface deforms into an umbrella shape, that is, the position of contact with the point deforms in the same direction as the force, and the remaining position on the surface deforms in the opposite direction of the force, similar to the contraction of an umbrella.

[0042] In this embodiment, oil grooves are symmetrically provided on both sides of the top of the inner wall of the pocket 2, and the cylindrical surface gradually increases from bottom to top, that is, the distance between the ball and the cylindrical surface gradually increases in the range of 0.10-0.15 mm; in this way, not only can the pocket 2 store more grease and avoid friction and wear between the ball installed in the pocket 2 and the arc surface of the pocket 2, but also the small inner space in the pocket 2 does not easily cause the ball to move around in the pocket 2, and the ball is effectively controlled.

[0043] Reference Figure 2 A circular arc surface 22 is provided at the connection between the annular base 11 and the bottom end of the cylindrical surface. This arrangement increases the capacity of the pocket 2. The pocket 2 can not only store more grease and avoid friction and wear between the balls installed in the pocket 2 and the inner wall of the pocket 2, but also is more suitable for the balls, and the balls are less likely to escape from the range of the pocket 2.

[0044] Reference Figure 3 The bottoms between adjacent pockets 2 are provided with conical arc-shaped structures 14. This arrangement not only reduces the weight of the retainer body 1 but also maintains the balance of the bottom. The retainer body 1 is provided with multiple annular grooves 13, which are arranged at opposite ends of the retainer body 1, corresponding to the pockets 2. Similarly, this arrangement further reduces the weight of the retainer body 1 without affecting the balance of the bottom.

[0045] Reference Figures 4-5, the present utility model further provides a bearing, which includes an outer ring 4, an inner ring 5 and balls 6 arranged between the outer ring 4 and the inner ring 5. The bearing further includes the above-mentioned cage, and the cage is used to accommodate the balls 6.

[0046] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, various changes and modifications can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. An integrally formed cage, characterized in that, Comprising two cage bodies arranged symmetrically, the cage bodies are integrally formed and include: An annular base having a front side and an opposite rear side; A plurality of cantilever portions extending forward in the axial direction of the cage body from the front side of the annular base, the cantilever portions being arranged along the circumference of the annular base such that a pocket for accommodating balls is formed between two adjacent cantilever portions; and A connecting portion including a connecting member and a connecting groove, the connecting member and the connecting groove are alternately arranged one by one inside the cantilever portion, and the connecting member is inserted into the connecting groove to connect the two cage bodies.

2. The one-piece formed cage according to claim 1, characterized in that, A positioning post and a positioning hole are provided on the top surface of one of the cantilever portions.

3. The integrally formed cage according to claim 1, wherein, The radial thickness of the annular base is greater than the radial thickness of the cantilever portion, and the inner wall of the pocket is a cylindrical surface extending along the radial direction of the cage body, the diameter of the cylindrical surface gradually increases from inside to outside and the cylindrical surface gradually increases from bottom to top.

4. The integrally formed cage according to claim 3, characterized in that, An arc surface is provided at the connection of the annular base with the bottom end of the cylindrical surface.

5. The integrally formed cage according to claim 1, characterized in that, A conical arc structure is provided at the bottom between adjacent pockets.

6. The integrally formed cage according to claim 5, wherein, A plurality of circular grooves are provided on the cage body, and the circular grooves are oppositely arranged at both ends of the cage body with respect to the pockets.

7. The integrally formed cage according to claim 1, wherein The cage body is integrally formed and the material is PA46-GF30.

8. The integrally formed cage according to claim 1, wherein A stop block is provided at the top end of the connecting member, and a stop groove is correspondingly provided at the bottom end of the connecting groove to cooperate with the stop block.

9. The integrally formed cage according to claim 1, wherein, An elastic deformation groove is provided on the outer side surface of the connecting member along its height direction.

10. A bearing, the bearing comprising an outer ring, an inner ring, and balls disposed between the outer ring and the inner ring, characterized in that, The bearing further includes a cage as described in any one of claims 1-9, and the cage is used to accommodate the balls.

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