Patent ID: 9121443
Filing Date: 2015-09-01
Classification: F16C

Abstract:
1. An angular ball bearing comprising: an outer ring comprising: a raceway surface on the inner circumferential surface thereof; a shoulder portion on one side of the raceway surface; and a first counter bore on the other side of the raceway surface; an inner ring comprising: a raceway surface on the outer circumferential surface thereof; a shoulder portion on one side of the raceway surface; and a second counter bore on the other side of the raceway surface; a plurality of balls provided between the raceway surface of the outer ring and the raceway surface of the inner ring so as to be rotatable at a contact angle, wherein the outer diameter dimension of the shoulder portion of the inner ring is larger than the inner diameter dimension of the shoulder portion of the outer ring, the shoulder portion of the outer ring and the shoulder portion of the inner ring are overlapped with each other when viewed in the axial direction, the first counter bore having no shoulder portion on at least one side when viewed in the axial direction, and wherein engagement portions are formed at the shoulder portion of the inner ring and at the shoulder portion of the outer ring such that the engagement portions each include a cut-out portion, and wherein when the angular ball bearings are stacked on top of one another in the axial direction, the cut-out of the engagement portion formed at the shoulder portion of the inner ring of one of the angular ball bearings is engaged with the cut-out of the engagement portion formed at the shoulder portion of the outer ring of the other angular ball bearing.