Retainer structure convenient to lubricate

Abstract

The utility model provides a retainer structure convenient to lubricate, which comprises a plurality of pockets uniformly formed in the circumferential surface of a retainer in the circumferential direction, rolling balls to be locked are respectively arranged in the pockets, a lintel is arranged between two adjacent pockets, bumps are arranged on the inner diameter surface of the lintel, and two adjacent bumps form a locking opening structure. The two faces, arranged in the circumferential direction, of the protruding block are a first arc-shaped face and a second arc-shaped face which are oppositely arranged, two first included angles are formed between the first arc-shaped face and the two end faces of the protruding block, and two second included angles are formed between the second arc-shaped face and the two end faces of the protruding block. The two first included angles and the two second included angles are in contact with the rolling ball to be locked; and meanwhile, more areas of the rolling bodies are in contact with lubricating oil, so that the lubricating performance is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearings, in particular to a cage structure facilitating lubrication. Background Art

[0002] In fields such as machine tools and high-speed motors, the rotational speed of bearings is relatively high, and the heat dissipation performance of bearings directly determines the thermal equilibrium rotational speed that the bearings can reach. On the premise that the bearing rings and rolling elements are the same, a smaller weight of the cage can reduce the generation of frictional heat caused by the moment of inertia. At the same time, reducing the contact between the cage and the rolling elements can also reduce the generation of frictional heat, facilitate the formation of an oil film, and provide a better lubrication effect. Currently, common cage materials include copper, stamped steel plates, phenolic resins, and plastics. Among them, phenolic resins and plastics are often selected for high-speed bearings due to their advantages such as small weight, good toughness, impact resistance, low noise, and corrosion resistance. For example, in a straight cylindrical pocket cage, this structure has a good lubrication effect, but in order to prevent excessive caging movement, only the thickness of the cage can be increased to achieve outer ring guidance or inner ring guidance. Summary of the Utility Model

[0003] In view of the above problems, the purpose of this application is to provide a cage structure facilitating lubrication, which can reduce the generation of frictional heat, and at the same time, a larger area of the rolling elements is in contact with the lubricating oil, improving the lubrication performance.

[0004] To achieve the above partial or all purposes or other purposes, the following technical solutions are provided in this application: A cage structure facilitating lubrication, on the circumferential surface of the cage, a number of pockets are evenly arranged circumferentially. In each of the several pockets, a rolling element to be locked is provided. The beam is arranged between two adjacent pockets. On the inner diameter surface of the beam, a convex block is provided. Two adjacent convex blocks form a locking structure. The two surfaces of the convex block arranged along the circumferential direction are a first arc surface and a second arc surface. The first arc surface and the second arc surface are arranged oppositely. The first arc surface forms two first included angles with the two end faces of the convex block, and the second arc surface forms two second included angles with the two end faces of the convex block. The two first included angles and the two second included angles are in contact with the rolling element to be locked.

[0005] Further, the two first included angles and the two second included angles form a guiding structure for the rolling element to be locked.

[0006] Further, the first arc surface and the second arc surface are not in line contact with the rolling element to be locked.

[0007] Further, the pocket is a straight pocket.

[0008] Further, the radius of the side of the first arc surface and the second arc surface close to the pocket is equal to the radius of the pocket, and the radius of the side of the first arc surface and the second arc surface far from the pocket is smaller than the radius of the pocket.

[0009] Further, the cage is made of nylon; nylon is selected as the material.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows: The two-stage structure combination design is adopted. The cage pocket is of a straight cylinder structure. Two adjacent convex blocks on the inner diameter surface of the cross beam form a locking structure, and the four included angles of the convex blocks form a guiding structure for the rolling balls to be locked; this not only reduces the weight of the cage but also solves the problem of large cage crosstalk; a cage structure with four-point contact of the rolling elements is realized, reducing the generation of frictional heat. At the same time, a larger area of the rolling elements comes into contact with the lubricating oil, improving the lubrication performance; the rolling elements retain more lubricating fluid, and the lubrication effect is better. Description of the Drawings

[0011] Figure 1 is a schematic structural diagram of the present utility model;

[0012] Figure 2 is a schematic diagram of the four-point contact between the cage and the rolling balls to be locked;

[0013] In the figure: 1, cage; 2, pocket; 3, cross beam; 4, convex block; 5, first arc surface; 6, second arc surface; 7, first included angle; 8, second included angle; 9, rolling balls to be locked. Detailed Embodiments

[0014] In order to make the structure and function of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model.

[0015] See the attached Figure 1-2 , a cage 1 structure with high rotational speed, light weight and easy lubrication. A number of pockets 2 are evenly arranged in the circumferential direction on the circumferential surface of the cage 1. A number of rolling balls 9 to be locked are respectively arranged in the pockets 2. The cross beam 3 is arranged between two adjacent pockets 2. A convex block 4 is arranged on the inner diameter surface of the cross beam 3. Two adjacent convex blocks 4 form a locking structure. The two surfaces of the convex block 4 arranged in the circumferential direction are a first arc surface 5 and a second arc surface 6. The first arc surface 5 and the second arc surface 6 are arranged oppositely. The first arc surface 5 and the two end surfaces of the convex block 4 form two first included angles 7, and the second arc surface 6 and the two end surfaces of the convex block 4 form two second included angles 8. The two first included angles 7 and the two second included angles 8 are in contact with the rolling balls 9 to be locked.

[0016] Further, the two first included angles 7 and the two second included angles 8 form a guiding structure for the rolling balls 9 to be locked.

[0017] Further, the first arc surface 5 and the second arc surface 6 are not in line contact with the rolling balls 9 to be locked; instead, they are in point contact to reduce the generation of frictional heat.

[0018] Further, the pocket hole 2 is a straight pocket hole 2.

[0019] Further, the radii of the sides of the first arc surface 5 and the second arc surface 6 close to the pocket hole 2 are equal to the radius of the pocket hole 2, and the radii of the sides of the first arc surface 5 and the second arc surface 6 away from the pocket hole 2 are smaller than the radius of the pocket hole 2.

[0020] Further, the cage 1 is made of nylon; the nylon material is selected and a new structure design is adopted, which not only meets the strength of the retainer but also reduces the weight and the generation of frictional heat.

[0021] The above-disclosed are only the preferred embodiments of the present application. Of course, the scope of rights of the present application cannot be limited thereby. Therefore, equivalent changes made according to the claims of the present application still fall within the scope covered by the present application.

Claims

1. A cage structure facilitating lubrication, characterized in that: A number of pocket holes are evenly arranged circumferentially on the circumferential surface of the cage. A number of pocket holes are respectively provided with rolling elements to be locked. The beam is arranged between two adjacent pocket holes. A convex block is arranged on the inner diameter surface of the beam. Two adjacent convex blocks form a locking structure. The two surfaces of the convex block arranged along the circumference are a first arc surface and a second arc surface. The first arc surface and the second arc surface are arranged oppositely. The first arc surface forms two first included angles with the two end faces of the convex block, and the second arc surface forms two second included angles with the two end faces of the convex block. The two first included angles and the two second included angles are in contact with the rolling elements to be locked.

2. The cage structure facilitating lubrication according to claim 1, characterized in that: The two first included angles and the two second included angles form a guiding structure for the rolling elements to be locked.

3. The cage structure facilitating lubrication according to claim 1, characterized in that: The first arc surface and the second arc surface are not in line contact with the rolling elements to be locked.

4. The cage structure facilitating lubrication according to claim 1, wherein: The pocket holes are straight pocket holes.

5. The cage structure facilitating lubrication according to claim 4, characterized in that: The radius of the side of the first arc surface and the second arc surface close to the pocket hole is equal to the radius of the pocket hole, and the radius of the side of the first arc surface and the second arc surface far from the pocket hole is smaller than the radius of the pocket hole.

6. The cage structure facilitating lubrication according to claim 1, wherein: The cage is made of nylon material.

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