Retainer suitable for high-speed deep groove ball bearing

Abstract

The utility model discloses a retainer suitable for a high-speed deep groove ball bearing, which is applied to the technical field of retainers, and adopts the technical scheme that the retainer comprises a retainer base body with a V-shaped structure and a plurality of pockets which are uniformly formed in the retainer base body at intervals along the circumferential direction and are used for accommodating rolling balls, the peripheral surface of the retainer base body is provided with an inclined face inclining towards the tip end of the inner side in the radial direction, and the side, away from the pockets, of the retainer base body is provided with a weight reduction groove used for reducing the weight of the retainer base body. The utility model has the technical effects that the deformation caused by centrifugal force is reduced, and the calorific value of high-speed rotation is reduced.

Description

Technical Field

[0001] This utility model relates to the field of cage technology, and in particular to a cage suitable for high-speed deep groove ball bearings. Background Technology

[0002] In recent years, the performance of deep groove ball bearings used in the power systems of new energy vehicles has improved. The relative rotational speeds of the outer and inner rings, as well as the cage rotational speed, have increased, leading to increased centrifugal force on the cage and making its elastic deformation no longer negligible. As the cage rotational speed increases, the centrifugal force also increases, causing radial elastic deformation of the elastic elements—that is, the top of the cage pocket displaces outward in the diametrical direction. During this elastic deformation, the main body of the cage also undergoes torsional elastic deformation, resulting in friction between the outer circumference of the cage and the inner surface of the outer ring. This increases the torque required for the relative rotation of the outer and inner rings. Simultaneously, the heat generated during operation increases temperature rise, abnormal noise, and wear on the cage surface. In extreme cases, this can lead to negative consequences such as cage breakage and bearing failure. In particular, when the aforementioned rotating machinery is used under high-temperature conditions, such as in the engine compartment of a car, the rigidity of the cage decreases, making it more prone to elastic deformation. Therefore, it is necessary to improve the existing cage structure in deep groove ball bearings to address this problem. Utility Model Content

[0003] The purpose of this invention is to provide a cage suitable for high-speed deep groove ball bearings, which has the advantages of reducing deformation caused by centrifugal force and reducing heat generation during high-speed rotation.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a cage suitable for high-speed deep groove ball bearings, comprising a cage base with a V-shaped structure and a plurality of pockets evenly spaced along the circumferential direction on the cage base for accommodating rolling balls, wherein the outer circumferential surface of the cage base is provided with an inclined surface that is radially inclined inward to the tip, and a weight-reducing groove is provided on the side of the cage base away from the pockets for reducing the weight of the cage base.

[0005] The present invention is further configured such that the radius of curvature of the inner surface of the pocket is greater than the radius of curvature of the rolling surface of the ball.

[0006] The present invention is further configured such that the cage substrate is made of polyamide resin, polyether ether ketone (PEEK), or polyarylether ether ketone (PAEK).

[0007] In summary, this utility model has the following beneficial effects:

[0008] 1. By providing an inclined surface that slopes radially inward towards the tip on the outer peripheral surface of the cage base, even if the tip of the cage undergoes elastic deformation outward in the diametrical direction when the cage rotates at high speed, friction between the tip of the cage and the inner surface of the outer ring of the bearing can be avoided, thereby reducing the heat generated during rotation. At the same time, a weight-reducing groove is provided on the side of the cage base away from the pocket, thereby reducing the overall weight of the cage base and reducing the deformation of the cage base caused by centrifugal force during high-speed rotation. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0010] Figure 2 This is a cross-sectional view of the overall structure of this embodiment.

[0011] Reference numerals: 1. Cage base; 2. Pocket; 3. Inclined surface; 4. Weight reduction groove. Detailed Implementation

[0012] The present invention will be further described in detail below with reference to the accompanying drawings.

[0013] Example:

[0014] refer to Figures 1 to 2A cage suitable for high-speed deep groove ball bearings includes a V-shaped cage base 1 and several pockets 2 evenly spaced along the circumference on the cage base 1 for accommodating rolling balls. The pockets 2 are located on the V-shaped tip side of the cage base 1. The radius of curvature of the inner surface of the pocket 2 is greater than the radius of curvature of the rolling surface of the ball, allowing the ball to maintain free rolling motion within the pocket 2. The concave surface of the pocket 2 is partially spherical with a single center of curvature. An inclined surface 3, radially inclined inward towards the inner tip, is provided on the outer circumferential surface of the cage base 1. Even if the tip of the cage undergoes elastic deformation outward in the diameter direction when the cage rotates at high speed, it can prevent the tip of the cage from rubbing against the inner surface of the outer ring of the bearing, thereby reducing the heat generated during rotation. A weight-reducing groove 4 is provided on the side of the cage base 1 away from the pocket 2 to reduce the weight of the cage base 1, thereby reducing the overall weight of the cage base 1 and reducing the deformation of the cage base 1 caused by centrifugal force during high-speed rotation. The weight-reducing groove 4 is not connected to the pocket 2 and there is a sufficient gap between them, thereby ensuring that the wider end of the cage base 1 has sufficient structural strength. In this embodiment, the cage substrate 1 is made of polyamide resin, polyether ether ketone (PEEK), or polyarylether ether ketone (PAEK). The polyamide resin may preferably include, but is not limited to, polytetramethylene hexamethylenediamine (PA46), polyhexamethylenediamine adipate (PA56), polyhexamethylenediamine adipate (PA66), polydecanediamine adipic anhydride (PA410), polydecanediamine hexamethylenediamine (PA510), poly(terephthalamide nonyldiamine) (PA9T), or polyphenylene dicarbonyldecanediamine (PA10T).

[0015] Brief description of the operating principle: By setting an inclined surface 3 that is radially inclined inward to the tip on the outer peripheral surface of the cage base 1, even if the tip of the cage undergoes elastic deformation outward in the diameter direction when the cage rotates at high speed, the tip of the cage can avoid friction with the inner surface of the outer ring of the bearing, thereby reducing the heat generated during rotation. At the same time, a weight-reducing groove 4 is opened on the side of the cage base 1 away from the pocket 2, thereby reducing the overall weight of the cage base 1 and reducing the deformation of the cage base 1 caused by centrifugal force during high-speed rotation.

[0016] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment that make creative contributions as needed, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A cage suitable for use in high speed deep groove ball bearings, characterized in that, The application relates to a cage base body (1) in a V-shaped structure and a plurality of pockets (2) for accommodating rolling balls and arranged on the cage base body (1) and uniformly spaced apart along the circumferential direction, and an outer circumferential surface of the cage base body (1) is provided with an inclined surface (3) inclined to the inside in the radial direction, when the tip of the cage base body (1) is deformed outward under the action of centrifugal force, the inclined surface (3) can form a gap avoiding interference with the inner wall of the bearing outer ring, and a lightening groove (4) for reducing the weight of the cage base body (1) is arranged on the side of the cage base body (1) away from the pockets (2).

2. A cage suitable for use in high speed deep groove ball bearings according to claim 1, characterized in that, The curvature radius of the inner surface of the pocket (2) is greater than the curvature radius of the rolling surface of the rolling ball.

3. A cage suitable for use in high speed deep groove ball bearings according to claim 1, characterized in that, The cage base body (1) is made of polyamide resin or polyether ether ketone (PEEK) or polyaryletherketone (PAEK) material.

Images