Positioning ring structure for motor

Abstract

A positioning ring structure for a motor includes an axial tube, a bearing mounted in the axial tube, and a positioning ring mounted in the axial tube for retaining the bearing in place. The positioning ring includes a central hole extended through by a shaft. The positioning ring includes at least one circulating hole facing an inner circumferential wall of the axial tube. The circulating hole is a through-hole. The lubricating oil that has flowed outward via the central hole of the positioning ring flows back into the axial tube via the circulating hole. Thus, the circulating hole provides a circulating path for the lubricating oil, prevents outflow and loss of the lubricating oil, protects the motor by preventing wear to the shaft and the bearing, and prolongs the life of the motor.

Dependencies are inferred from the claim text.