Patent ID: 9030068
Filing Date: 2015-05-12
Classification: H02K,Y10T

Abstract:
1. A spindle motor comprising: a shaft fixedly connected directly or indirectly to a base member and having a depression groove formed in a central portion of an outer peripheral surface thereof; a sleeve rotatably installed on the shaft and having a communication hole formed so as to be connected to the depression groove; a rotor hub fixedly installed on the sleeve to thereby rotate together therewith; a lower thrust member installed on the base member and mounted on a lower end portion of the shaft; and an upper thrust member fixedly installed on an upper end portion of the shaft, wherein the communication hole is inclined so that lubricating fluid is easily injected into the depression groove, the sleeve includes a fluid storage part formed on an outer peripheral surface thereof, the fluid storage part being connected to the communication hole and temporarily storing the lubricating fluid therein, and the rotor hub includes