Multiple row combination ball bearing

摘要

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

主权项

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.