Roller bearing

Patent metadata

Field	Value
Publication number	US-2017204902-A1
Application number	US-201615392263-A
Country	US
Kind code	A1
Filing date	Dec 28, 2016
Priority date	Jan 18, 2016
Publication date	Jul 20, 2017
Grant date	—

Abstract

A roller bearing includes an inner ring having an inner-ring raceway surface on an outer periphery of the inner ring, an outer ring arranged concentric with and peripherally outside the inner ring, and having, on an inner periphery of the outer ring, an outer-ring raceway surface that faces the inner-ring raceway surface, a plurality of rollers interposed between the inner-ring raceway surface and the outer-ring raceway surface in a rollable manner, and a cage that holds the rollers at predetermined intervals along a circumferential direction. Opposite end portions of the outer-ring raceway surface in an axial direction serve as guide surfaces or which rotation of the cage is guided. Or an outer periphery of the cage, slidable contact surfaces are formed which slidably contact the guide surfaces and which are arranged to thee the respective guide surfaces across a labyrinth clearance.

First claim

What is claimed is:

1 . A roller bearing comprising:
an inner ring having an inner-ring raceway surface on an outer periphery of the inner ring; an outer ring arranged concentric with and peripherally outside the inner ring and having, on an inner periphery of the outer ring, an outer-ring raceway surface that faces the inner-ring raceway surface; a plurality of rollers interposed between the inner-ring raceway surface and the outer-ring raceway surface in a rollable manner; and a cage that holds the rollers at predetermined intervals along a circumferential direction, wherein at least one end portion of the outer-ring raceway surface in an axial direction serves as a guide surface on Which rotation of the cage is guided, and on an outer periphery of the cage, a slidable contact surface is formed which slidably contacts the guide surface and which is arranged to face the guide surface across a labyrinth clearance.

2 . The roller bearing according to claim 1 , wherein crowning is applied to the outer-ring raceway surface, and
the guide surface is thrilled away from a neighborhood of a crowning center on the outer-ring raceway surface in the axial direction.

3 . The roller bearing according to claim 1 , wherein, on an outer periphery of the inner ring, an outer-peripheral cylindrical surface is formed on a first side of the inner-ring raceway surface in the axial direction, and on an inner periphery of the cage, an inner-peripheral cylindrical surface is formed which is arranged to face the outer-peripheral cylindrical surface of the inner ring across a labyrinth clearance.

4 . The roller bearing according to claim 2 , wherein, on an outer periphery of the inner ring, an outer-peripheral cylindrical surface is formed on a first side of the inner-ring raceway surface in the axial direction, and on an inner periphery of the cage, an inner-peripheral cylindrical surface is formed which is arranged to face the outer-peripheral cylindrical surface of the inner ring across a labyrinth clearance.

5 . The roller bearing according to claim 1 , wherein the cage is formed of a resin material that is hard enough to bury, into the cage, foreign matter having entered into the labyrinth clearance.

6 . The roller bearing according to claim 2 , wherein the cage is formed of a resin material that is hard enough to bury, into the cage, foreign matter having entered into the labyrinth clearance.

7 . The roller bearing according to claim 3 , wherein the cage is formed of a resin material that is hard enough to bury, into the cage, foreign matter having entered into the labyrinth clearance.

8 . The roller hearing according to claim 4 , wherein the cage is formed of a resin material that is hard enough to bury, into the cage, foreign matter having entered into the labyrinth clearance.

Assignees

• Jtekt Corp

Inventors

• Shishihara Yuki
• Kamamoto Shigeo
• Murata Junji

Classifications

• F16C33/56

  Selection of substances (F16C33/48, F16C33/49 take precedence) · CPC title

• F16C19/364 Primary

  with tapered rollers, i.e. rollers having essentially the shape of a truncated cone · CPC title

• F16C33/4605 Primary

  Details of interaction of cage and race, e.g. retention or centring · CPC title

• F16C33/4676

  of the stays separating adjacent cage pockets, e.g. guide means for the bearing-surface of the rollers · CPC title

• F16C33/46

  Cages for rollers or needles · CPC title