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US 8,803,391 B2Granted
Spindle motor
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorJun Seop Shin
Life of this patent
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Abstract
There is provided a spindle motor including: a sleeve supporting a shaft; and a rotor hub coupled to an upper portion of the shaft to thereby form a bearing clearance with the sleeve, wherein the sleeve and the rotor hub are provided with a plurality of sealing parts for preventing a leakage of a lubricating fluid.
Claims7
A spindle motor comprising:
- a sleeve supporting a shaft;
- and
- a rotor hub coupled to an upper portion of the shaft to thereby form a bearing clearance with the sleeve, the rotor hub including an extension wall part extended downwardly in the axial direction from a lower surface thereof,
- wherein the sleeve includes a protrusion part protruding in the outer diameter direction so as to be disposed under the extension wall part, and
- the sleeve and the rotor hub are provided with a plurality of sequentially disposed sealing parts for preventing a leakage of a lubricating fluid, the plurality of sealing parts including
- a first sealing part formed by an outer peripheral surface of the sleeve disposed above the protrusion part and an inner surface of the extension wall part, and
- a second sealing part formed by a lower surface of the extension wall part and an upper surface of the protrusion part.
4 more elements
Dependencies are inferred from the claim text.