High-speed mute angular contact ball bearing retainer

Abstract

The utility model discloses a high-speed mute angular contact ball bearing retainer, which is applied to the technical field of angular contact ball bearing retainers, and adopts the technical scheme that the high-speed mute angular contact ball bearing retainer comprises a retainer base body, a plurality of pockets used for guiding rolling balls are evenly distributed in the retainer base body in the circumferential direction, and guide steps used for locking radial movement between the retainer base body and the rolling balls are symmetrically arranged on the inner wall of the retainer base body and located on the two sides of the pockets in the center line direction. The pockets are connected with the guide steps based on arc-shaped connecting parts; the angular contact bearing has the technical effects that the structure is simple, the stability of the angular contact bearing is improved, and the operation noise is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of angular contact ball bearing retainers, in particular to a high-speed and silent angular contact ball bearing retainer. Background Art

[0002] The main structure of a rolling bearing is mainly composed of an inner ring, an outer ring, rolling elements and a cage. The cage is used to limit the setting position of the rolling elements and keep the rolling elements rotating normally during the bearing transmission process. The rolling elements are installed inside the pockets of the cage. The bearing cage mainly plays the role of evenly distributing and guiding the rolling elements, storing grease, and keeping the bearing running smoothly. In the field of ultra-high-speed bearings, the cage has always been the main problem affecting the quality of bearing operation.

[0003] During the high-speed operation of angular contact bearings, the instability of the bearing cage movement will directly lead to the generation of noise. Figure 1 As shown, a common solution to this problem is to use a ball-guided stepped hole to lock the radial movement between the cage and the ball, thereby preventing the cage from contacting the inner and outer rings of the bearing during movement. This design makes the cage movement more stable, thereby reducing the generation of noise. However, under high-speed operation, due to centrifugal force and temperature, the cage expands radially, thereby reducing the gap between the cage and the ball, increasing heat generation, and thus affecting and limiting the speed of the cage. There is a need for improvement. Utility Model Content

[0004] The utility model aims to provide a high-speed and silent angular contact ball bearing retainer, which has the advantages of simple structure, increased stability of the angular contact bearing and reduced operating noise.

[0005] The above technical objectives of the present utility model are achieved through the following technical solutions: a high-speed and silent angular contact ball bearing retainer, comprising a retainer base; the retainer base is evenly distributed with a number of pockets for guiding rolling balls along the circumferential direction, the inner wall of the retainer base is symmetrically provided with guide steps on both sides of the pockets along the center line direction for locking the radial movement between the retainer base and the rolling balls, and the pockets and the guide steps are connected based on an arc-shaped connecting portion.

[0006] The utility model is further configured as follows: an arc-shaped fitting portion for fitting to the surface of the rolling ball is provided on the guide step.

[0007] The present invention is further configured as follows: a rounded corner is provided between the arc-shaped connecting portion and the arc-shaped fitting portion.

[0008] The utility model is further configured such that: the guide steps are provided between adjacent pockets with transition slopes inclined toward both sides of the retaining frame base for improving deformation caused by material shrinkage during injection molding of the retaining frame base.

[0009] The utility model is further configured as follows: the transition slope is connected to the inner side surface of the retaining frame base based on a transition fillet, and the flexibility of the rolling ball in rotating in the pocket is improved based on the transition fillet.

[0010] In summary, the present invention has the following beneficial effects:

[0011] 1. During the high-speed rotation of the cage, the cage base undergoes radial expansion and axial deformation due to centrifugal force and temperature. By arranging guide steps on both sides of the pocket to replace the traditional circumferential guide, the radial expansion of the guide steps will make the contact between the rolling ball and the cage base closer, thereby improving the defect that the center of the rolling ball is not aligned with the center of the pocket due to the gap between the pocket and the rolling ball of the cage, and providing additional support for the rolling ball during the rotation of the cage, thereby improving the stability of the cage during movement. At the same time, the axial deformation of the cage base releases the contact between the rolling ball and the cage base, effectively increasing the stability of the cage base during rotation, and adapting to use in higher-speed scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 Schematic diagram of the structure of the circumferential guide cage of this embodiment;

[0013] Figure 2 It is a front view of the whole embodiment;

[0014] Figure 3 It is a schematic diagram of the overall structure of this embodiment;

[0015] Figure 4 It is a cross-sectional view of the overall structure of this embodiment;

[0016] Figure 5 yes Figure 4 An enlarged schematic diagram of part A.

[0017] Reference numerals: 1. cage base; 2. pocket; 3. guide step; 4. arc-shaped connecting portion; 5. arc-shaped fitting portion; 6. transition slope; 7. transition fillet. DETAILED DESCRIPTION

[0018] The present invention will be described in further detail below with reference to the accompanying drawings.

[0019] Example:

[0020] refer to Figures 2 to 5 A high-speed and silent angular contact ball bearing cage includes a cage base 1. A plurality of pockets 2 for guiding rolling balls are evenly distributed on the cage base 1 along the circumferential direction. Guide steps 3 for locking the radial movement between the cage base 1 and the rolling balls are symmetrically provided on the inner wall of the cage base 1 on both sides of the pockets 2 along the center line direction. The pockets 2 and the guide steps 3 are connected based on an arc-shaped connecting portion 4 to avoid interference with the rolling balls. An arc-shaped fitting portion 5 for fitting the surface of the rolling balls is provided on the guide steps 3. A rounded corner is provided between the arc-shaped connecting portion 4 and the arc-shaped fitting portion 5. The arc-shaped fitting portion 5 supports the upper and lower sides of the rolling balls. During the high-speed rotation of the cage, due to the effects of centrifugal force and temperature, the cage base 1 produces radial expansion and axial deformation. The radial expansion of the guide step 3 will make the contact between the rolling ball and the cage base 1 closer, thereby improving the defect that the center of the rolling ball is not aligned with the center of the pocket 2 due to the gap between the cage pocket 2 and the rolling ball, and providing additional support for the rolling ball during the rotation of the cage, thereby improving the stability of the cage during movement. At the same time, due to the axial deformation of the cage base 1, the contact between the rolling ball and the cage base 1 is released, effectively increasing the stability of the cage base 1 during rotation.

[0021] refer to Figure 5 Specifically, the guide step 3 is provided with a transition slope 6 between adjacent pockets 2, which is inclined toward both sides of the cage base 1 to improve the deformation caused by material shrinkage during injection molding of the cage base 1. The transition slope 6 is connected to the inner side surface of the cage base 1 based on a transition fillet 7, and the flexibility of the rolling ball in the pocket 2 is improved based on the transition fillet.

[0022] Brief description of the usage process: Due to the centrifugal force and temperature during the high-speed rotation of the cage, the cage base 1 produces radial expansion and axial deformation. The radial expansion of the guide step 3 will make the contact between the rolling ball and the cage base 1 closer, thereby improving the defect that the center of the rolling ball is not aligned with the center of the pocket 2 due to the gap between the cage pocket 2 and the rolling ball. At the same time, the axial deformation of the cage base 1 releases the contact between the rolling ball and the cage base 1, effectively increasing the stability of the cage base 1 during rotation.

[0023] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A high-speed and silent angular contact ball bearing cage, comprising a cage base (1); characterized in that: The retaining frame base (1) is provided with a plurality of pockets (2) for guiding rolling balls evenly distributed along the circumferential direction, the inner wall of the retaining frame base (1) is symmetrically provided with guide steps (3) for locking the radial movement between the retaining frame base (1) and the rolling balls on both sides of the pockets (2) along the center line direction, and the pockets (2) and the guide steps (3) are connected based on an arc-shaped connecting portion (4).

2. A high-speed and silent angular contact ball bearing cage according to claim 1, characterized in that: The guide step (3) is provided with an arc-shaped fitting portion (5) for fitting to the surface of the rolling ball.

3. A high-speed and silent angular contact ball bearing cage according to claim 2, characterized in that: A rounded corner is provided between the arc-shaped connecting portion (4) and the arc-shaped fitting portion (5).

4. The high-speed and silent angular contact ball bearing cage according to claim 1, characterized in that: The guide step (3) is provided between adjacent pockets (2) with a transition slope (6) inclined toward both sides of the retainer base (1) for improving deformation caused by material shrinkage during injection molding of the retainer base (1).

5. The high-speed and silent angular contact ball bearing cage according to claim 4, characterized in that: The transition slope (6) is connected to the inner side surface of the retaining frame base (1) based on a transition fillet (7), and the flexibility of the rolling ball rotating in the pocket (2) is improved based on the transition fillet (7).

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