Rolling bearing

Patent metadata

Field	Value
Publication number	US-2016290398-A1
Application number	US-201615081127-A
Country	US
Kind code	A1
Filing date	Mar 25, 2016
Priority date	Apr 1, 2015
Publication date	Oct 6, 2016
Grant date	—

Abstract

A rolling bearing includes an outer ring, an inner ring, a plurality of balls disposed between the outer ring and the inner ring and allowed to roll, and a snap cage that is made of resin and holds the balls. The snap cage includes an annular main portion and a plurality of cage bars. The cage bars each protrude from a right side surface of the main portion. Pockets are formed between the cage bars to house the respective balls. An inner circumferential surface and an outer circumferential surface of each of the cage bars in a radial direction have respective tilted surfaces that form a tapered shape in an axial direction. This allows lubricant oil to flow well in the rolling bearing in both directions.

First claim

What is claimed is:

1 . A rolling bearing comprising:
an outer bearing ring; an inner bearing ring; a plurality of rolling elements disposed between the outer bearing ring and the inner bearing ring and allowed to roll; and a snap cage that is made of resin and holds the rolling elements, wherein the snap cage includes an annular main portion and a plurality of cage bars; the cage bars each protrude in an axial direction from a side surface of the main portion on one side in the axial direction; pockets are formed between the cage bars that are adjacent to each other to house the respective rolling elements; and an inner circumferential surface and an outer circumferential surface of each of the cage bars in a radial direction have respective tilted surfaces that form a tapered shape in the axial direction.

2 . The rolling bearing according to claim 1 , wherein
in a protruding end portion of each of the cage bars of the snap cage, at least one of the inner circumferential surface and the outer circumferential surface has a straight surface that is parallel to the axial direction.

3 . The rolling bearing according to claim 1 , wherein
the tilted surfaces of the inner circumferential surface and the outer circumferential surface of each of the cage bars are tilted toward a center line of the cage bar by the same angle to form a tapered shape.

4 . The rolling bearing according to claim 2 , wherein
the tilted surfaces of the inner circumferential surface and the outer circumferential surface of each of the cage bars are tilted toward a center line of the cage bar by the same angle to form a tapered shape.

5 . The rolling bearing according to claim 1 , wherein
the tilted surfaces of the inner circumferential surface and the outer circumferential surface of each of the cage bars are tilted toward a center line of the cage bar at different angles to form a tapered shape.

6 . The rolling bearing according to claim 2 , wherein
the tilted surfaces of the inner circumferential surface and the outer circumferential surface of each of the cage bars are tilted toward a center line of the cage bar at different angles to form a tapered shape.

7 . The rolling bearing according to claim 1 , wherein
a surface of the main portion of the cage, which is on an opposite side of the main portion from the one side where the cage bars are formed, is a flat surface having no recess.

Assignees

• Jtekt Corp

Inventors

• Maeda Masaki
• Yasuda Yuu

Classifications

• F16C2361/65

  Gear shifting, change speed gear, gear box · CPC title

• F16C2361/63

  Gears with belts and pulleys · CPC title

• F16C33/6681

  Details of distribution or circulation inside the bearing, e.g. grooves on the cage or passages in the rolling elements · CPC title

• F16C33/416 Primary

  made from plastic, e.g. injection moulded comb cages · CPC title

• F16C19/06

  with a single row or balls · CPC title