Multiple row combination ball bearing

Patent metadata

Field	Value
Publication number	US-9360046-B2
Application number	US-201213581950-A
Country	US
Kind code	B2
Filing date	Jan 17, 2012
Priority date	Feb 25, 2011
Publication date	Jun 7, 2016
Grant date	Jun 7, 2016

Abstract

A multiple row combination ball bearing 10 includes at least two rows of ball bearings 11 A and 11 B. A counterbore 12 d is formed on a groove shoulder 12 c of an outer ring 12 of the respective ball bearings 11 A and 11 B. The respective ball bearings 11 A and 11 B have an inner and outer diameter dimension and a width dimension corresponding to a standard bearing of the ISO standard. An extension line L of a contact angle α of the ball bearing 11 A passes through an axial direction end plane 12 e of the ball bearing 11 B which is adjacent to the ball bearing 11 A at one side in the axial direction. The extension line L of the contact angle α of the adjacent ball bearing 11 B passes through the axial direction end plane 13 e of the ball bearing 11 A.

First claim

The invention claimed is:

1. A multiple row combination ball bearing, comprising:
at least two rows of ball bearings arranged in a parallel combination, the at least two rows of ball bearings including a first ball bearing and a second ball bearing arranged adjacent to each other in an axial direction,
wherein each of the ball bearings comprises an outer ring and an inner ring,
wherein the outer ring comprises a first outer ring groove shoulder, a second outer ring groove shoulder having a smaller radial thickness than the first outer ring groove shoulder, and an outer ring raceway groove provided between the first and second outer ring groove shoulders,
wherein the inner ring comprises a first inner ring groove shoulder, a second inner ring groove shoulder having a smaller radial thickness than the first inner ring groove shoulder, and an inner ring raceway groove provided between the first and second inner ring groove shoulders,
wherein an extension line of a contact angle of the first ball bearing passes through an axial direction end plane of the second outer ring groove shoulder of the second ball bearing, and an extension line of the contact angle of the second ball bearing passes through an axial direction end plane of the second inner ring groove shoulder of the first ball bearing, the second outer ring groove shoulder of the second ball bearing forming a counterbore having an inclination angle of 3° to 15° with respect to the axial direction,
wherein the first and second ball bearings are arranged in tandem, and
wherein the extension lines of the first and second ball bearings extend in substantially the same direction.

2. The multiple row combination ball bearing according to claim 1 ,
wherein said at least two rows of the ball bearings further comprises a third ball bearing arranged adjacent to the second ball bearing such that the second ball bearing is arranged between the first and third ball bearings in the axial direction, and
wherein the extension line of the contact angle of the second ball bearing passes through an axial direction end plane of one of the first and second outer ring groove shoulders of the third ball bearing that is adjacent to the first outer ring groove shoulder of the second ball bearing.

3. A multiple row combination ball bearing comprising:
at least two rows of ball bearings arranged in a parallel combination, the at least two rows of ball bearings including a first ball bearing and a second ball bearing arranged adjacent to each other in an axial direction,
wherein each of the ball bearings comprises an outer ring and an inner ring,
wherein the outer ring comprises a first outer ring groove shoulder, a second outer ring groove shoulder having a smaller radial thickness than the first outer ring groove shoulder, and an outer ring raceway groove provided between the first and second outer ring groove shoulders,
wherein the inner ring comprises a first inner ring groove shoulder, a second inner ring groove shoulder having a smaller radial thickness than the first inner ring groove shoulder, and an inner ring raceway groove provided between the first and second inner ring groove shoulders,
wherein extension lines passing through radial direction bilateral end points of an osculating ellipse inside the outer ring raceway groove of the first ball bearing and a ball center of the first ball bearing respectively pass through an outer circumferential surface of the outer ring of the first ball bearing and an axial direction end plane of the second outer ring groove shoulder of the second ball bearing,
wherein extension lines passing through radial direction bilateral end points of an osculating ellipse inside the inner ring raceway groove of the second ball bearing and a ball center of the second ball bearing respectively pass through an inner circumferential surface of the inner ring of the second ball bearing and an axial direction end plane of the second inner ring groove shoulder of the first ball bearing,
the second outer ring groove shoulder of the second ball bearing forms a counterbore having an inclination angle of 3° to 15° with respect to the axial direction,
wherein the first and second ball bearings are arranged in tandem, and
wherein the extension lines of the first and second bearings extending in substantially the same direction.

4. The multiple row combination ball bearing according to claim 3 ,
wherein said at least two rows of the ball bearings further comprises a third ball bearing arranged adjacent to the second ball bearing such that the second ball bearing is arranged between the first and third ball bearings in the axial direction, and
wherein extension lines passing through radial direction bilateral end points of an osculating ellipse inside the outer ring raceway groove of the second ball bearing and the ball center of the second ball bearing respectively pass through an outer circumferential surface of the outer ring of the second ball bearing and an axial direction end plane of one of the first and second outer ring groove shoulders of the third ball bearing that is adjacent to the first outer ring groove shoulder of the second ball bearing.

5. A multiple row combination ball bearing comprising:
at least two rows of ball bearings arranged in a parallel combination, the at least two rows of ball bearings including a first ball bearing and a second ball bearing arranged adjacent to each other in an axial direction; and
an inner ring spacer and an outer ring spacer provided between the first and second ball bearings,
wherein each of the ball bearings comprises an outer ring and an inner ring,
wherein the outer ring comprises a first outer ring groove shoulder, a second outer ring groove shoulder having a smaller radial thickness than the first outer ring groove shoulder, and an outer ring raceway groove provided between the first and second outer ring groove shoulders,
wherein the inner ring comprises a first inner ring groove shoulder, a second inner ring groove shoulder having a smaller radial thickness than the first inner ring groove shoulder, and an inner ring raceway groove provided between the first and second inner ring groove shoulders,
wherein an extension line of a contact angle of first ball bearing passes through an axial direction end plane of the outer ring spacer provided adjacent to the second outer ring groove shoulder of the second ball bearing and an axial direction end plane of the second outer ring groove shoulder of the second hail bearing, and an extension line of a contact angle of the second ball bearing passes through an axial direction end plane of the inner ring spacer provided adjacent to the second inner ring groove shoulder of the first ball bearing and an axial direction end plane of the second inner ring groove shoulder of the first ball hearing,
wherein the first and second ball bearings are arranged in tandem, and
wherein the extension lines of the first and second bearings extend in substantially the same direction.

6. The multiple row combination ball bearing according to claim 5 , further comprising another outer ring spacer and another inner ring spacer,
wherein said at least two rows of the ball bearings further comprises a third ball bearing arranged adjacent to the second ball bearing such that the other outer ring spacer and the other inner ring spacer are provided between the second and third ball bearings and such that the second ball bearing is arranged between the first and third ball bearings in the axial direction,
wherein the extension line of the contact angle of the second ball bearing passes through an axial direction end plane of the other outer ring spacer which is adjacent to the second outer ring groove shoulder of the third ball bearing.

Assignees

• Okamoto Shin
• Katsuno Yoshiaki
• Nsk Ltd

Inventors

• Okamoto Shin
• Katsuno Yoshiaki

Classifications

• F16C2240/34

  Contact angles · CPC title

• F16C19/541 Primary

  Systems consisting of juxtaposed rolling bearings including at least one angular contact bearing · CPC title

• F16C19/163

  with angular contact · CPC title

• F16C33/58

  Raceways; Race rings · CPC title