Rotating member for motor and base assembly for motor, and motor including the same

Patent metadata

Field	Value
Publication number	US-8952585-B2
Application number	US-201213609567-A
Country	US
Kind code	B2
Filing date	Sep 11, 2012
Priority date	Sep 26, 2011
Publication date	Feb 10, 2015
Grant date	Feb 10, 2015

Abstract

There is provided a rotating member for a motor, the rotating member including: a hub coupled to a shaft system of the motor and rotating together therewith; a main wall portion protruding from one surface of the hub and allowing oil to be sealed between the main wall portion and a sleeve supporting the shaft system; and a pumping portion formed in a lower surface of the main wall portion and generating fluid pressure for preventing a leakage of the oil.

First claim

What is claimed is:

1. A rotating member for a motor, the rotating member comprising:
a hub coupled to a shaft system of the motor and rotating together therewith;
a main wall portion protruding from one surface of the hub and allowing oil to be sealed between the main wall portion and a sleeve supporting the shaft system; and
a pumping portion formed in a lower surface of the main wall portion and generating fluid pressure for preventing a leakage of the oil.

2. The rotating member of claim 1 , wherein the pumping portion generates the fluid pressure in an inner diameter direction in the case in which the hub rotates.

3. The rotating member of claim 1 , wherein the pumping portion is formed as a groove having a spiral shape or a helix shape.

4. The rotating member of claim 1 , wherein the main wall portion is formed to surround an outer peripheral surface of the sleeve so that a fluid-air interface between the oil and surrounding air is formed between the main wall portion and an outer peripheral surface of an upper portion of the sleeve.

5. The rotating member of claim 1 , wherein the lower surface of the main wall portion faces a base to which the sleeve is fixed.

6. A base assembly for a motor, the base assembly comprising:
a sleeve supporting a shaft system of the motor rotating together with a hub and allowing oil to be sealed between the sleeve and a main wall portion protruding from one surface of the hub;
a base having the sleeve fixed thereto; and
a pumping portion formed in an upper surface of the base and generating fluid pressure for preventing a leakage of the oil.

7. The base assembly of claim 6 , wherein the pumping portion generates the fluid pressure in an inner diameter direction in the case in which the hub rotates.

8. The base assembly of claim 6 , wherein the pumping portion is formed as a groove having a spiral shape or a helix shape.

9. The base assembly of claim 6 , wherein an outer peripheral surface of the sleeve facing the main wall portion is tapered so as to have a diameter reduced downwardly in an axial direction.

10. The base assembly of claim 6 , wherein the upper surface of the base faces a lower surface of the main wall portion protruding from one surface of the hub.

11. A motor comprising:
a hub coupled to a shaft system of the motor and rotating together therewith;
a sleeve supporting the shaft system;
a base having the sleeve fixed thereto;
a main wall portion protruding from one surface of the hub and allowing oil to be sealed between the main wall portion and the sleeve; and
a pumping portion formed in at least one of a lower surface of the main wall portion and the base facing the lower surface of the main wall portion and generating fluid pressure for preventing a leakage of the oil.

Assignees

• Park Dong Jin
• Samsung Electro Mech

Inventors

• Park Dong Jin

Classifications

• F16C17/107

  with at least one surface for radial load and at least one surface for axial load · CPC title

• H02K7/085 Primary

  radially supporting the rotary shaft at only one end of the rotor (H02K7/086, H02K7/09 take precedence) · CPC title

• F16C33/745

  by capillary action · CPC title

• G11B19/20

  Driving; Starting; Stopping; Control thereof · CPC title

• G11B33/02 Primary

  Cabinets; Cases; Stands; Disposition of apparatus therein or thereon · CPC title