Tapered roller bearing and cage

Patent metadata

Field	Value
Publication number	US-12305703-B2
Application number	US-202118028885-A
Country	US
Kind code	B2
Filing date	Mar 22, 2021
Priority date	Oct 6, 2020
Publication date	May 20, 2025
Grant date	May 20, 2025

Abstract

A tapered roller bearing includes: an inner ring; an outer ring; a plurality of tapered rollers in rolling contact with an inner and an outer ring raceway; and an annular cage that has a plurality of pockets for accommodating the tapered rollers. The cage has a plurality of first lateral faces respectively facing outer peripheral surfaces of the tapered rollers respectively accommodated in the plurality of pockets from a first side in a circumferential direction of the cage and a plurality of second lateral faces respectively facing the outer peripheral surfaces from a second side in the circumferential direction of the cage. The plurality of pockets includes a first pocket with a first angle as an angle formed by the first and second lateral faces, and a second pocket that has a second angle smaller than the first angle as the angle formed by the first and second lateral faces.

First claim

The invention claimed is:

1. A tapered roller bearing comprising:
an inner ring that has an inner ring raceway provided on an outer peripheral side, a small flange portion provided on a first side of the inner ring raceway in an axial direction, and a large flange portion provided on a second side of the inner ring raceway in the axial direction, the large flange portion having a larger diameter than the small flange portion;
an outer ring that has an outer ring raceway on an inner peripheral side;
a plurality of tapered rollers in rolling contact with the inner ring raceway and the outer ring raceway; and
a cage that is annular and has a plurality of pockets for accommodating the tapered rollers, wherein
the cage has a plurality of first lateral faces facing outer peripheral surfaces of the tapered rollers accommodated in the plurality of pockets from a first side in a circumferential direction of the cage and a plurality of second lateral faces facing the outer peripheral surfaces of the tapered rollers from a second side in the circumferential direction of the cage,
the plurality of pockets includes a first pocket which defines a first angle between the first lateral face and the second lateral face, and a second pocket which defines a second angle smaller than the first angle between the first lateral face and the second lateral face, and
each of the first angle and the second angle is defined by a first line and a second line crossing each other, the first line passing through a radially inner end and a radially outer end of the first lateral faces in a cross section of the cage taken along a plane perpendicular to an axial direction of each of the tapered rollers, the second line passing through a radially inner end and a radially outer end of the second lateral faces in the cross section of the cage.

2. The tapered roller bearing according to claim 1 , wherein the first lateral face and the second lateral face in the second pocket have, on the first side in the axial direction, a recessed portion that increases a gap between the tapered roller accommodated in the second pocket and the first and second lateral faces.

3. The tapered roller bearing according to claim 1 ,
wherein, in relation to a radial direction of the cage, the first lateral faces and the second lateral faces are provided to form a first gap with the tapered roller accommodated in the first pocket and are provided to form a second gap larger than the first gap with the tapered roller accommodated in the second pocket.

4. The tapered roller bearing according to claim 1 , wherein
the cage includes a plurality of small-diameter-side lateral faces respectively facing small-diameter-side end faces of the tapered rollers respectively accommodated in the plurality of pockets, and a plurality of large-diameter-side lateral faces respectively facing large-diameter-side end faces of the tapered rollers respectively accommodated in the plurality of pockets, and
when a distance between the small-diameter-side lateral face and the large-diameter-side lateral face in the first pocket is defined as a first distance, a distance between the small-diameter-side lateral face and the large-diameter-side lateral face in the second pocket is a second distance larger than the first distance.

5. The tapered roller bearing according to claim 1 , wherein
the cage includes a plurality of small-diameter-side lateral faces respectively facing small-diameter-side end faces of the tapered rollers respectively accommodated in the plurality of pockets,
each of the small-diameter-side lateral faces has a small-diameter-side first lateral face located on an inner side of the cage in the radial direction and a small-diameter-side second lateral face located further to an outer side of the cage in the radial direction with respect to the small-diameter-side first lateral face,
when a distance between the small-diameter-side first lateral face and the small-diameter-side end face in the first pocket is defined as a third distance, a distance between the small-diameter-side first lateral face and the small-diameter-side end face in the second pocket is a fourth distance larger than the third distance, and
a distance between the small-diameter-side second lateral face and the small-diameter-side end face in the second pocket is a fifth distance smaller than the fourth distance.

6. The tapered roller bearing according to claim 1 , wherein
the cage includes a plurality of large-diameter-side lateral faces respectively facing large-diameter-side end faces of the tapered rollers respectively accommodated in the plurality of pockets,
each of the large-diameter-side lateral faces has a large-diameter-side first lateral face located on an outer side of the cage in the radial direction and a large-diameter-side second lateral face located further to an inner side of the cage in the radial direction with respect to the large-diameter-side first lateral face,
when a distance between the large-diameter-side first lateral face and the large-diameter-side end face in the first pocket is defined as a sixth distance, a distance between a radially outer end of the large-diameter-side first lateral face and the large-diameter-side end face in the second pocket is a seventh distance larger than the sixth distance, and
a distance between the large-diameter-side second lateral face and the large-diameter-side end face in the second pocket is an eighth distance smaller than the seventh distance.

7. The tapered roller bearing according to claim 1 , wherein a plurality of the second pockets is spaced from each other in the circumferential direction with the first pocket interposed between the second pockets.

8. A cage for a tapered roller bearing, the tapered roller bearing including
an inner ring that has an inner ring raceway provided on an outer peripheral side, a small flange portion provided on a first side of the inner ring raceway in an axial direction, and a large flange portion provided on a second side of the inner ring raceway in the axial direction, the large flange portion having a larger diameter than the small flange portion,
an outer ring that has an outer ring raceway on an inner peripheral side, and
a plurality of tapered rollers in rolling contact with the inner ring raceway and the outer ring raceway, the cage comprising:
a plurality of pockets for accommodating the tapered rollers;
a plurality of first lateral faces facing outer peripheral surfaces of the tapered rollers respectively accommodated in the plurality of pockets from a first side in a circumferential direction of the cage; and
a plurality of second lateral faces facing the outer peripheral surfaces of the tapered rollers accommodated in the plurality of pockets from a second side in the circumferential direction of the cage, wherein
the plurality of pockets includes a first pocket which defines a first angle between the first lateral face and the second lateral face, and a second pocket which defines a second angle smaller than the first angle between the first lateral face and the second lateral face, and
each of the first angle and the second angle is between a first line and a second line crossing each other, the first line and second line passing through a radially inner end and a radially outer end of the first lateral faces in a cross section of the cage taken along a plane perpendicular to an axial direction of the tapered rollers, the second line passing through a radially inner end and a radially outer end of the second lateral faces in the cross section of the cage.

Assignees

• Jtekt Corp

Inventors

• Taniguchi Youzou

Classifications

• F16C33/4635

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

• F16C2240/46

  Gap sizes or clearances · CPC title

• F16C43/08

  by deforming the cages or the races · CPC title

• F16C43/065

  in cages · CPC title

• F16C2240/30

  Angles, e.g. inclinations · CPC title