# US 9,431,873 B2 · Motor having a braking function and used in linear actuator

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- Number: US 9,431,873 B2
- Document ID: US9431873B2
- Status: Granted
- Kind: B2
- Application number: 14/973,176
- Filed: 2015-12-17
- Published: 2016-04-14
- Granted: 2016-08-30
- Earliest claimed: 2011-12-30
- Assignees: Timotion Technology Co., Ltd.
- Applicants: Timotion Technology Co., Ltd.
- Inventors: Chou-Hsin Wu
- Web page: https://patentgrep.com/patent/US9431873B2

## CPC

- H02K 7/102: with friction brakes
- F16D 49/02: shaped as a helical band or coil with more than one turn, with or without intensification of the braking force by the tension of the band or contracting member (similar clutches F16D13/08)
- F16H 25/2454: {Brakes; Rotational locks}
- H02K 7/116: with gears
- H02K 7/1166: {comprising worm and worm-wheel (structural association with bearings specially adapted for worm gear drives H02K7/081)}
- A61G 7/018: Control or drive mechanisms
- F16H 2025/209: {using worm gears}
- H02K 7/14: Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06)
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})
- F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16H: GEARING
- A61G: TRANSPORT, PERSONAL CONVEYANCES OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS (appliances for aiding patients or disabled persons to walk A61H3/00); OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES (embalming corpses A01N1/00)

## Abstract

A motor, which has a braking function and is used in a linear actuator includes a main body, a rotation shaft, a braking means and a stopping means. The rotation shaft penetrates the center of the main body. The braking means includes a braking ring and a helical ring. The braking ring includes a plurality of curved plates. The helical ring surrounds outer edges of the curved plates. Each curved plate is put on the outer periphery of the rotation shaft. The stopping means is disposed between the main body and the braking means for restricting the rotation of any of the curved plates. By this arrangement, a better braking and decelerating function can be achieved.

## Claims

### Claim 1

A motor having a braking function and used in a linear actuator, including:
a main body;
a rotation shaft penetrating the center of the main body;
a braking means comprising a braking ring and a helical ring, the braking ring being constituted of a plurality of curved plates, the helical ring surrounding an outer edge of each curved plate, each curved plate being put on an outer periphery of the rotation shaft; and
a stopping means disposed between the main body and the braking means for restricting the rotation of any of the curved plates;
wherein the main body comprises a shaft tube, the shaft tube is put on the rotation shaft and fixed to the interior of the main body, and the stopping means includes an insertion hole provided in the shaft tube and a pin fixed to any of the curved plates and inserted into the insertion hole.

### Claim 2 (depends on 1)

The motor having a braking function and used in a linear actuator according to claim 1, wherein the main body is provided with an insertion trough, the helical spring extends to form a positioning arm, and the positioning arm is inserted into the insertion trough for positioning.

### Claim 3 (depends on 1)

The motor having a braking function and used in a linear actuator according to claim 1, wherein the braking ring is formed into a circular shape, and the helical spring is a circular ring for elastically pressing the braking ring.

### Claim 4 (depends on 1)

The motor having a braking function and used in a linear actuator according to claim 1, wherein the braking ring is formed into a stepped circular shape, and the helical spring is a circular ring for elastically pressing the braking ring.