Synthetic resin cage and deep groove ball bearing for deep groove ball bearing

摘要

PPROBLEM TO BE SOLVED: To provide a synthetic resin holder for a deep groove ball bearing capable of improving lubricating properties. PSOLUTION: At one side in the axial direction of a first cylindrical split holder 41, the other side in the axial direction of the second cylindrical split holder 42 is assembled, and notches 45 and 50 forming a pocket for holding a ball with both split holders 41 and 42 assembled are formed at a one-side surface in the axial direction of the first split holder 41 and at the other-side surface in the axial direction of the second split holder 42 with a space in the circumferential direction. Between the first split holder 41 and the second split holder 42, a connection part X for the non-separation of both split holders 41 and 42 in the axial direction by means of engagement when both the split holders 41 and 42 are assembled is provided. After assembled to a deep groove ball bearing, when an outer race 11 and an inner race 21 relatively rotate, pump action is generated in the bearing due to the difference of the circumferential speed caused by the difference of the diameters between the first split holder 41 and the second split holder 42, and lubricating oil is forcedly made to flow in the bearing. PCOPYRIGHT: (C)2011,JPO&INPIT