Main shaft motor


Application Number: 00109318
Application Date: 2000.05.29
Publication Number: 1314741
Publication Date: 2001.09.26
Priority Information: 2000/3/17 KR 13610/2000
International: F16C33/10;H02K5/00;H02K5/167
Applicant(s) Name: Samsung Electronics Co., Ltd.
Address:
Inventor(s) Name: Chong Dae-Hyun
Patent Agency Code: 11219
Patent Agent: xie lina
Abstract A spindle motor is disclosed which allows more excellent abrasion resistance and productivity exhibited by making the thrust to be integrally formed at driving shaft and by making each of kinetic pressure-generating grooves that generate fluid kinetic pressure in axial direction to be formed at different formation position from each other that may be less influenced than ever by force of friction with fluid material. Whence the formation for it by the present invention is composed of a base plate 10, a sleeve 20, a stator assembly 30, a shaft 40 molded integrally with flange-shaped thrust 41 at bottom part, a rotor assembly 50, a set of kinetic pressure-generating grooves 70, which grooves are formed on inner diameter surface of the above sleeve 20 opposing the outer cylindrical surface of the above shaft 40, and another set of kinetic pressure-generating grooves 80, which grooves are formed on cover plate 60 top surface and stepwise-jawed inner cylindrical surface of the above sleeve 20 or thrust 41 top surface.