Taper roller bearing

Patent metadata

Field	Value
Publication number	US-10221891-B2
Application number	US-201515516226-A
Country	US
Kind code	B2
Filing date	Oct 23, 2015
Priority date	Oct 29, 2014
Publication date	Mar 5, 2019
Grant date	Mar 5, 2019

Abstract

A taper roller bearing includes: an inner ring, an outer ring, a plurality of taper rollers in which a cavity portions are formed on a large end surface, and an annular cage. The cage includes a small-diameter annular portion on one axial side, a large-diameter annular portion which is positioned on the other axial side and on the outer side in the radial direction of the large flange, and a plurality of column portions. An outer diameter of an axial inner surface included in the large-diameter annular portion is greater than a diameter of a virtual circle that links outer end portions in the radial direction of the cavity portions of the plurality of taper rollers.

First claim

The invention claimed is:

1. A taper roller bearing comprising:
an inner ring that includes a small flange that is positioned on a first side of the taper roller bearing in an axial direction and that protrudes to an outer side of the inner ring in a radial direction, and a large flange that is positioned on a second side of the taper roller bearing in the axial direction and that protrudes to the outer side of the inner ring in the radial direction;
an outer ring that is positioned on the outer side of the inner ring in the radial direction;
a plurality of taper rollers that are positioned between the inner ring and the outer ring, each taper roller including a cavity portion on a side of the taper roller that faces the second side of the taper roller bearing; and
an annular cage that holds the plurality of taper rollers at an interval in a circumferential direction,
wherein:
the cage includes a small-diameter annular portion that is positioned on the first side of the taper roller bearing, a large-diameter annular portion that is positioned on the second side of the taper roller bearing and on the outer side of the inner ring in the radial direction, and a plurality of column portions that link the small-diameter annular portion and the large-diameter annular portion with each other,
an outer diameter of an inner surface in the axial direction of the large-diameter annular portion is larger than a diameter of a virtual circle that links outer end portions in the radial direction of the cavity portions of the plurality of taper rollers,
a clearance is formed between the large-diameter annular portion and the large flange, and
all of the cavity portions are covered by a labyrinth structure made by the large-diameter annular portion, the large flange, and the clearance, whereby for each of the cavity portions, the inner surface of the large-diameter annular portion in the axial direction covers the majority of the cavity portion in the radial direction.

2. The taper roller bearing according to claim 1 , wherein:
spaces formed between the large-diameter annular portion and the small-diameter annular portion and between the column portions adjacent to each other in the circumferential direction are pockets that hold the taper rollers, and
cut-out portions that are continuous to the pockets are provided on the outer circumferential side of the large-diameter annular portion.

Assignees

• Jtekt Corp

Inventors

• Kamamoto Shigeo
• Murata Junji
• Shishihara Yuki

Classifications

• F16C33/4605

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

• F16C2300/02

  General use or purpose, i.e. no use, purpose, special adaptation or modification indicated or a wide variety of uses mentioned · CPC title

• F16C33/4635

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

• F16C33/6674

  related to the amount supplied, e.g. gaps to restrict flow of the liquid · CPC title

• F16C33/4676 Primary

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