# US 2013/0154418 A1 · Spindle motor

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- Number: US 2013/0154418 A1
- Document ID: US20130154418A1
- Status: Published application
- Kind: A1
- Application number: 13/711,941
- Filed: 2012-12-12
- Published: 2013-06-20
- Earliest claimed: 2011-12-15
- Assignees: Samsung Electro-Mechanics Co., Ltd.
- Inventors: Sang Jae SONG
- Web page: https://patentgrep.com/patent/US20130154418A1

## CPC

- H02K 5/165: {radially supporting the rotor around a fixed spindle; radially supporting the rotor directly (H02K5/167, H02K5/173 take precedence)}
- H02K 5/163: {radially supporting the rotary shaft at only one end of the rotor (H02K5/165, H02K5/167, H02K5/173 take precedence)}
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})

## Abstract

There is provided a spindle motor, including: a hub rotated together with a shaft; a sleeve supporting rotation of the shaft via oil; and a stopper mounted on the hub to prevent the hub from overfloating with respect to the sleeve, wherein one of opposing surfaces of the stopper and the hub is provided with at least one press-fitting groove for press-fitting the stopper in the hub, and the other of the opposing surfaces of the stopper and the hub is provided with at least one press-fitting protrusion press-fitted to the press-fitting groove.

## Claims

### Claim 1

A spindle motor, comprising:
a hub rotated together with a shaft;
a sleeve supporting rotation of the shaft via oil; and
a stopper mounted on the hub to prevent the hub from overfloating with respect to the sleeve,
one of opposing surfaces of the stopper and the hub being provided with at least one press-fitting groove for press-fitting the stopper in the hub, and the other of the opposing surfaces of the stopper and the hub being provided with at least one press-fitting protrusion press-fitted to the press-fitting groove.

### Claim 2 (depends on 1)

The spindle motor of claim 1, wherein the press-fitting groove is formed in the stopper, and
the press-fitting protrusion is formed on the hub.

### Claim 3 (depends on 1)

The spindle motor of claim 1, wherein the press-fitting groove is formed on an upper surface of the stopper, and
the press-fitting protrusion is formed on one surface of the hub facing the upper surface of the stopper.

### Claim 4 (depends on 1)

The spindle motor of claim 1, wherein the press-fitting groove and the press-fitting protrusion are seamlessly or spacedly formed in a circumferential direction.

### Claim 5 (depends on 1)

The spindle motor of claim 1, wherein the press-fitting groove and the press-fitting protrusion are symmetrically formed, based on a rotational center of the shaft.

### Claim 6 (depends on 1)

The spindle motor of claim 1, wherein the hub is provided with a wall part protruded axially downwardly from an outer surface of the sleeve, and
the stopper is mounted on the wall part.

### Claim 7 (depends on 6)

The spindle motor of claim 6, wherein an outer circumferential surface of the stopper and an inner circumferential surface of the wall part are coupled to each other by an adhesive.

### Claim 8 (depends on 1)

The spindle motor of claim 1, wherein the stopper contacts the sleeve to prevent the shaft from overfloating.