Roller bearing cage and manufacturing method therefor as well as roller bearing manufacturing method

Patent metadata

Field	Value
Publication number	US-9422981-B2
Application number	US-201314383217-A
Country	US
Kind code	B2
Filing date	Mar 7, 2013
Priority date	Mar 7, 2012
Publication date	Aug 23, 2016
Grant date	Aug 23, 2016

Abstract

A roller bearing cage ( 1 A) is configured such that a pair of ring parts ( 4, 6 ) axially separated from each other is connected by column parts ( 5 ) sliding on outer peripheral surfaces of rollers (RA), and pocket holes (P) are evenly formed to store and hold the rollers (RA) in a peripheral wall portion in a circumferential direction. The cage ( 1 A) is manufactured such that a base body ( 2 ) including the ring part ( 4 ) and the column parts ( 5 ) with square columnar convexes ( 5 A) and a connection body ( 3 ) including the ring part ( 6 ) with square holes ( 6 A) are set as separate members.

First claim

The invention claimed is:

1. A roller bearing cage configured such that a pair of ring parts axially separated from each other is connected by a plurality of column parts sliding on outer peripheral surfaces of conical rollers or spherical rollers as rolling elements, and a plurality of pocket holes is evenly formed in a peripheral wall portion in a circumferential direction to store and hold the rolling elements,
wherein a base body including one of the ring parts and the column parts with square columnar convexes at leading ends thereof and a connection body including the other ring part with square holes for fitting with the square columnar convexes of the column parts are set as separate members,
wherein these members are manufactured based on blanks obtained by cutting and processing steel plates,
wherein the column parts of the base body are formed by folding along an outer peripheral portion of the ring part of the base body or are formed by folding along an inner peripheral portion of the ring part of the base body,
wherein when the column parts of the base body are formed by folding along the outer peripheral portion of the ring part of the base body, tongue pieces are formed so as to be protruded from the outer peripheral portion of the ring part of the base body to between the column parts, and inclined surfaces to be in surface contact with end surfaces of the rolling elements are formed in the tongue pieces,
wherein when the column parts of the base body are formed by folding along the inner peripheral portion of the ring part of the base body, tongue pieces are formed so as to be protruded from the inner peripheral portion of the ring part of the base body to between the column parts, and inclined surfaces to be in surface contact with the end surfaces of the rolling elements are formed in the tongue pieces, and
wherein the base body and the connection body are joined and fixed together while the square columnar convexes of the base body are fitted into the square holes of the connection body.

2. The roller bearing cage according to claim 1 , wherein the inclined surfaces are formed by a press process after the base body and the connection body are integrated.

3. The roller bearing cage according to claim 1 , wherein the ring part of the connection body is formed in a disc-spring shape so as to be orthogonal to the column parts of the base body.

4. The roller bearing cage according to claim 1 , wherein press-fit portions to be press-fitted into the square holes of the connection body are formed at the base end-side portions on both circumferential side surfaces of the square columnar convexes of the base body.

5. The roller bearing cage according to claim 1 , wherein protrusion pieces protruded from circumferential front-back surfaces are formed at the
base-end sides of the square columnar convexes in the column parts of the base body, and
a clearance is formed between a pair of protrusion pieces protruded from one to the other of the adjacent column parts.

6. The roller bearing cage according to claim 5 , wherein circumferential width dimension of the square columnar convexes is set equal to or larger than circumferential width dimension of the column parts at the base-end sides across the protrusion pieces.

7. The roller bearing cage according to claim 1 , wherein the rolling elements are spherical rollers, and
retaining projections to be inserted into retaining concaves in end surfaces of the spherical rollers are formed at the ring part of the base body or the ring part of the connection body.

8. The roller bearing cage according to claim 1 , wherein the base body and the connection body are joined and fixed together by inserting the square columnar convexes of the base body into the square holes of the connection body, and protruding leading ends of the square columnar convexes from the surface of the connection body, and then performing a swing swaging process on the leading ends of the square columnar convexes for plastic deformation to increase the square columnar convexes in diameter, and
swaged portions are evenly formed in the circumferential direction, which are protruded from the surface of the connection body and are approximately rectangular in shape as seen from the axial direction.

9. A roller bearing cage configured such that a pair of a small-diameter ring part and a large-diameter ring part axially separated from each other is connected by a plurality of column parts sliding on outer peripheral surfaces of spherical rollers as rolling elements, and a plurality of pocket holes is evenly formed in a circumferential direction to store and hold the rolling elements in a bowl-shaped or inverted cone-shaped peripheral wall portion while the small-diameter ring part is on the lower side and an axial direction is vertically located,
wherein a base body including the small-diameter ring part and the column parts with square columnar convexes at leading ends thereof and a connection body including the large-diameter ring part with square holes for fitting with the square columnar convexes of the column parts are set as separate members,
wherein these members are manufactured based on blanks obtained by cutting and processing steel plates, and
wherein the large-diameter ring part is provided with large diameter-side end surface receivers that slide on large diameter-side end surfaces of the rolling elements to guide the rolling elements.

10. The roller bearing cage according to claim 9 , wherein inclined surfaces to be in surface contact with the large diameter-side end surfaces of the rolling elements are formed in the large diameter-side end surface receivers.

11. The roller bearing cage according to claim 9 , wherein tongue pieces are fanned so as to be protruded from the outer peripheral portion of the small-diameter ring part of the base body to between the column parts, and
inclined surfaces to be in surface contact with small diameter-side end surfaces of the rolling elements are formed in the tongue pieces.

12. The roller bearing cage according to claim 9 , wherein rotation center axes of the spherical rollers are located at the inner-diameter side across the column parts, and
the large diameter-side end surface receivers are formed at an inner diameter-side end portion of the large-diameter ring part or at the inner diameter-side end portion and outer diameter-side end portion of the large-diameter ring part.

13. The roller bearing cage according to claim 9 , wherein the rotation center axes of the spherical rollers are located at the outer-diameter side across the column parts, and
the large diameter-side end surface receivers are formed at the outer diameter-side end portion of the large-diameter ring part.

14. The roller bearing cage according to claim 9 , wherein the base body and the connection body are joined and fixed together by inserting the square columnar convexes of the base body into the square holes of the connection body, and protruding leading ends of the square columnar convexes from the surface of the connection body, and then performing a swing swaging process on the leading ends of the square columnar convexes for plastic deformation to increase the square columnar convexes in diameter, and
swaged portions are evenly formed in the circumferential direction, which are protruded from the surface of the connection body and are approximately rectangular in shape as seen from the axial direction.

Assignees

• Nakanishi Metal Works Co

Inventors

• Kamiji Michiyuki
• Okano Masaki
• Maeda Hiroyuki
• Kawatake Yoshio
• Teshima Kenji
• YABUBAYASHI Yasuki
• HOSOKAWA Tomomi

Classifications

• B21D53/12 Primary

  cages for bearings · CPC title

• F16C2220/82

  by cutting · CPC title

• F16C33/4605 Primary

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

• F16C23/086

  forming a track for rolling elements · CPC title

• F16C33/542

  made from sheet metal · CPC title