Split type high-speed deep groove ball retainer and bearing

Abstract

The split type high-speed deep groove ball 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; the connecting part comprises connecting pieces and connecting grooves, the connecting pieces and the connecting grooves are sequentially and alternately arranged on the outer side of the cantilever part one by one, and the connecting pieces are inserted into the connecting grooves so that the two retainer bodies can be connected; the radial thickness of the annular base part is larger than that of the cantilever part, the inner walls of the pockets are cylindrical surfaces extending in the radial direction of the retainer body, and the diameters of the cylindrical surfaces are gradually increased from inside to outside. The radial thickness of the annular base part is greater than that of the cantilever part, so that the deformation of the retainer, namely the umbrella effect, can be obviously reduced or inhibited.

Description

Technical Field

[0001] The present invention relates to the technical field of bearing cages, and particularly to a split-type high-speed deep groove ball 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. When the bearing is in use, the balls and the cage will undergo high-speed rotational friction with each other, resulting in frictional damage to the balls and the cage, generating high temperatures that cause the cage to deform and damage. At the same time, when the rotational friction gradually increases, it will cause noise, affecting the normal use of the bearing and also the efficient and rapid transmission between components.

[0003] To solve the above problems, generally, lubricating oil is coated on the surface of the balls, so that when the balls rotate, the frictional force between the balls and the cage is reduced, it is not easy to cause frictional damage, and the generation of noise is reduced, improving the use effect of the bearing. For example, the patent application number is CN202311079327.8, and the patent name is a bearing cage and a bearing applicable to the cage. It is provided with a lubrication and noise reduction structure on the cage, so that the installation groove on the cage can store more grease and avoid frictional wear between the balls installed in the installation groove and the arc surface of the installation groove. However, as the rotational speed increases, due to the increase in centrifugal force, it bends radially outward, resulting in the so-called umbrella effect. The umbrella effect deteriorates the matching relationship between the installation groove and the balls, leading to an increase in friction between the cage and the balls, and the performance of the bearing deteriorates and / or fails. Summary of the Utility Model

[0004] In view of the deficiencies in the above problems, the present invention provides a split-type high-speed deep groove ball cage.

[0005] To achieve the above object, the present invention provides a split-type high-speed deep groove ball cage, including two symmetrically arranged cage bodies. The 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. 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] A connecting portion including a connecting member and a connecting groove. The connecting member and the connecting groove are alternately arranged one by one on the outside of the cantilever portion. The connecting member is inserted into the connecting groove to connect the two cage bodies;

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

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

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

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

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

[0014] Preferably, a plurality of circular ring grooves are provided on the cage body, and the circular ring grooves and the pocket holes are arranged at both ends of the cage body opposite to each other.

[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 provided on the outer side surface of the connecting piece along its height direction.

[0018] The present invention also provides a bearing, including 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 split cage of the present invention has detachability, which can effectively avoid the problem of high maintenance cost caused by the inability to perform separate maintenance or replacement of parts; the radial thickness of the annular base is greater than that of the cantilever part, which can significantly reduce or suppress the deformation of the cage, that is, the so-called umbrella effect; the diameter of the cylindrical surface of the pocket hole gradually increases from the inside to the outside, so that not only can the pocket hole store more grease and avoid friction and wear between the balls installed in the pocket hole and the arc surface of the pocket hole, but also the inner space of the pocket hole is small and it is not easy to cause large crosstalk of the balls in the pocket hole, and the balls are effectively controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of the split high-speed deep groove ball cage body of the present invention;

[0022] Figure 2 This is the top view of the novel split-type high-speed deep groove ball cage body;

[0023] Figure 3 This is the structural diagram of the novel split-type high-speed deep groove ball cage;

[0024] Figure 4 This is the schematic diagram of the bearing of the present invention;

[0025] Figure 5 This is the sectional view of the bearing of the present invention. Description of the Drawings

[0027] 1. Cage body; 11. Annular base; 12. Cantilever part; 13. Circular ring groove; 14. Conical arc structure; 2. Pocket; 21. Oil groove; 22. Arc surface; 3. Connecting part; 31. Connecting piece; 32. Connecting groove; 311. Block; 321. Block groove; 33. Positioning hole; 34. Positioning column; 35. Through groove; 4. Outer ring; 5. Inner ring; 6. Ball. Detailed Embodiments

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

[0029] In the description of the present novel, 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 novel 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 novel. In addition, the terms "first", "second", "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0030] In the description of the present novel, 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 novel can be understood according to specific situations.

[0031] The following will further describe the present novelty in detail in conjunction with the attached drawings: Figures 1-5

[0032] Referring to Figure 1 , the present novelty provides a split-type high-speed deep groove ball cage, including two symmetrically arranged cage bodies 1. The two symmetrically arranged cage bodies 1 are integrally formed, and their material 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 high-speed rotation requirements.

[0033] The cage body 1 includes:

[0034] An annular base 11, which has a front side and an opposite rear side;

[0035] A plurality of cantilever portions 12, which extend 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, so that a pocket 2 for accommodating the balls 6 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 on the outer side of 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] Among them, 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 cage deformation, that is, 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 the inside to the outside. In this way, not only can the pocket 2 store more grease and avoid frictional 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 6 in the pocket 2, and the balls are effectively controlled.

[0038] Referring to Figure 2 , a positioning column 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 column 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 in the shape of a rectangular block, and the connecting groove 32 matches the connecting member 31. To make the connection more secure, a stopper 311 is provided at the top of the connecting member 31, and a stopper 321 is provided at the bottom of the connecting groove 32 to match the stopper 311. This makes it less likely that the two retainer bodies 1 will separate after connection, and the connection is more secure.

[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-slot 35 is defined in the cantilever portion 12, which houses the connector 31. This through-slot 35 not only reduces the weight of the retainer body 1 but also reduces the radial distance between the axis of the retainer body 1 and the radially outer surface of the cantilever portion 12. This smaller outer diameter of the cantilever portion 12, combined with the reduced material required due to the presence of the through-slot 35, reduces the centrifugal force acting on the cantilever portion 12. Consequently, the retainer body 1 exhibits the technical advantage of reduced radial outward bending, thereby minimizing or suppressing the so-called umbrella effect. The presence of the connecting slot 32 and the retaining slot 321 further reduces the material required by the cantilever portion 12, further minimizing or suppressing the so-called umbrella effect.

[0042] In this embodiment, oil grooves 21 are symmetrically provided on both sides of the top of the inner wall of the pocket hole 2, and the cylindrical surface gradually increases from bottom to top, that is, the distance between the ball 6 and the cylindrical surface gradually increases in the range of 0.10-0.15 mm; in this way, not only can the pocket hole 2 store more grease and avoid friction and wear between the ball 6 installed in the pocket hole 2 and the arc surface of the pocket hole 2, but also the small inner space in the pocket hole 2 does not easily cause the ball 6 to move around in the pocket hole 2, and the ball 6 is effectively controlled.

[0043] Reference Figure 2 A circular arc surface 22 is provided on the annular base 11 at the connection with 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 ball 6 installed in the pocket 2 and the inner wall of the pocket 2, but also is more suitable for the ball 6, and the ball 6 is 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 13. 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 invention further provides a bearing, comprising an outer ring 4, an inner ring 5, and balls 6 disposed between the outer ring 4 and the inner ring 5. The bearing further includes the above-described cage for accommodating the balls 6.

[0046] The above are only the preferred embodiments of the present novelty and are not intended to limit the present novelty. For those skilled in the art, the present novelty can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present novelty shall be included within the protection scope of the present novelty.

Claims

1. A split-type high-speed deep groove ball cage, characterized in that, Comprising two cage bodies arranged symmetrically, the cage body comprising: 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 circumferentially along the annular base such that a pocket for accommodating balls is formed between two adjacent cantilever portions; A connecting portion comprising a connecting member and a connecting groove, the connecting member and the connecting groove being alternately provided one by one on the outer side of the cantilever portion in sequence, the connecting member being inserted into the connecting groove to connect the two cage bodies; 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 radially along the cage body, and the diameter of the cylindrical surface gradually increases from inside to outside.

2. The split-type high-speed deep groove ball 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 split-type high-speed deep groove ball cage according to claim 1, characterized in that, Oil grooves are symmetrically formed on both sides of the top end of the inner wall of the pocket, and the cylindrical surface gradually increases from bottom to top.

4. The split-type high-speed deep groove ball cage according to claim 3, characterized in that, An arc surface is provided at the connection between the annular base and the bottom end of the cylindrical surface.

5. The split-type high-speed deep groove ball cage according to claim 1, wherein, A conical arc structure is provided at the bottom between adjacent pockets.

6. The split-type high-speed deep groove ball cage according to claim 5, characterized in that, A plurality of circular grooves are provided on the cage body, and the circular grooves and the pockets are oppositely arranged at both ends of the cage body.

7. The split-type high-speed deep groove ball cage according to claim 1, characterized in that, The cage body is integrally formed and the material is PA46-GF30.

8. The split-type high-speed deep groove ball cage according to claim 1, wherein, A stop block is provided at the top end of the connecting member, and a stop groove cooperating with the stop block is correspondingly provided at the bottom end of the connecting groove.

9. The split-type high-speed deep groove ball cage according to claim 1, characterized in that, An elastic deformation groove is formed 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 comprises a cage as described in any one of claims 1-9, the cage being used for accommodating the balls.

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