Hydrodynamic bearing assembly and motor including the same
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsHo Kyung Jang, Il Oung Park, Jong Rycol Oh
Life of this patent
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Abstract
A hydrodynamic bearing assembly includes a sleeve rotatably supporting a shaft, a thrust plate housing portion extending to an upper side of the sleeve in an axial direction so as to house a thrust plate, and a stopper ring housing portion stepped in an upper side of the thrust plate housing portion in the axial direction and housing a stopper ring for fixing the thrust plate. The stopper ring protrudes from the stopper ring housing portion such that an outer circumferential surface of the stopper ring has a larger height than an inner circumferential surface of the stopper ring housing portion.
Claims14
A hydrodynamic bearing assembly comprising:
- a sleeve rotatably supporting a shaft;
- a thrust plate housing portion extending to an upper side of the sleeve in an axial direction so as to house a thrust plate;
- a stopper ring housing portion stepped in an upper side of the thrust plate housing portion in the axial direction and housing a stopper ring for fixing the thrust plate,
- the stopper ring protruding from the stopper ring housing portion such that a step portion in an outer circumferential surface of the stopper ring having a larger height than an inner circumferential surface of the stopper ring housing portion is formed;
- and
- a welding portion formed on the step portion covering the outer circumferential surface of the stopper ring and the upper circumferential surface of the stopper ring housing portion all together.
A motor comprising:
- a shaft inserted into a sleeve to be rotatably installed;
- a rotor forcibly inserted into the shaft and comprising a magnet facing a winding coil of a stator;
- the sleeve rotatably supporting the shaft;
- a thrust plate housing portion extending to an upper side of the sleeve in an axial direction so as to house a thrust plate;
- a stopper ring housing portion stepped in an upper side of the thrust plate housing portion in the axial direction and housing a stopper ring for fixing the thrust plate,
- the stopper ring protruding from the stopper ring housing portion such that a step portion in an outer circumferential surface of the stopper ring having a larger height than an inner circumferential surface of the stopper ring housing portion is formed;
- and
- a welding portion formed on the step portion covering the outer circumferential surface of the stopper ring and the upper circumferential surface of the stopper ring housing portion all together.
Dependencies are inferred from the claim text.