Patent ID: 8545105
Filing Date: 2013-10-01
Classification: F16C

Abstract:
1. A rolling bearing assembly which comprises: a plurality of balls interposed between inner and outer rings; and a retainer for retaining the balls, wherein the retainer is of a crown shaped configuration including a retainer ring body having one side face formed with a plurality of pockets, each having a portion with an opening, defined at respective locations in a circumferential direction for accommodating therein the balls, a grease reservoir depressed portion provided between the pockets neighboring with each other in the circumferential direction of the retainer ring body for reserving a grease, and a communicating port in the form of a cutout open radially of the retainer ring body provided to communicate the grease reservoir depressed portion and the pocket for allowing the grease deposited on the balls to migrate into the grease reservoir depressed portion as a result of relative movement between the balls and the retainer; wherein the grease reservoir depressed portion, when viewed in a plane containing an axis of the retainer ring body and passing a middle point between the neighboring pockets, has such a shape as to be defined by an inner wall face of the retainer ring body and a connecting segment bridging between the neighboring pockets; and wherein the grease reservoir depressed portion has one or both of an inclined face of the inner wall face inclined relative to the axis and an inclined face of the connecting segment inclined relative to a plane that lies perpendicular to the axis.