Miniature bearing plastic retainer

Abstract

The invention discloses a miniature bearing plastic retainer. The miniature bearing plastic retainer is characterized in that each pocket of the miniature bearing plastic retainer is designed in a three-section mode in the radial direction of a retainer body, the middle section of the miniature bearing plastic retainer is a cylindrical hole, the inner section and the outer section of the miniaturebearing plastic retainer are each in a cone shape with a large outside and small inside in the radial direction of the retainer body, and the cone angle of the inner section is larger than that of the outer section. Due to the fact that the inlet and the outlet of each pocket are conical, when the bearing rotates at a high speed, lubricating grease can be easily contained at the bottom close to the inner diameter end of each pocket and can easily enter the pocket, and the lubricating effect between steel balls and the pockets of the retainer is enhanced; the cone angle of the inner section isgreater than that of the outer section so that lubricating grease can be easily retained at the port of the outer section when flowing out of the pocket, and can be quickly sprayed to an outer raceway under the action of quick rotation of the steel balls and centrifugal force, thereby the contact lubricating effect between the outer raceway and the steel balls can be improved; and the designed oil groove is beneficial to oil storage and lubrication between the steel balls and the retainer when the bearing rotates at a high speed, friction and temperature rise are reduced, deformation of a locking jaw is reduced, normal guiding of the steel balls is guaranteed, and the service life of the bearing is prolonged.

Description

technical field [0001] The invention belongs to a bearing cage, in particular to a miniature bearing plastic cage. Background technique [0002] Such as figure 1 As shown, the miniature bearing plastic cage generally includes a ring-shaped frame body 1, the frame body has a ring wall, and a plurality of pocket holes 2 are uniformly opened on the ring wall, and the pocket holes 2 are usually designed to be at the upper end along the radial direction of the frame body 1. Open cylindrical through hole. However, if figure 2 As shown, due to the inner guide method of the cage, the inner guide gap δ1 between the inner diameter of the cage and the rib of the bearing inner ring 5 is smaller than the gap δ2 between the outer diameter of the cage and the rib of the bearing outer ring 6 (δ1 <δ2), the lubricating grease is difficult to hold near the bottom of the inner diameter of the pocket, and it is also difficult to enter the pocket, resulting in poor lubrication effect betwe...

AI Technical Summary

Problems solved by technology

However, if figure 2 As shown, due to the inner guide method of the cage, the inner guide gap δ1 between the inner diameter of the cage and the rib of the bearing inner ring 5 is smaller than the gap δ2 between the outer diameter of the cage and the rib of the bearing outer ring 6 (δ1

Images