# US 2018/0323671 A1 · Armature for permanent magnet brushed motor

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- Number: US 2018/0323671 A1
- Document ID: US20180323671A1
- Status: Published application
- Kind: A1
- Application number: 15/586,265
- Filed: 2017-05-03
- Published: 2018-11-08
- Earliest claimed: 2017-05-03
- Inventors: Chi-Wen Chen
- Web page: https://patentgrep.com/patent/US20180323671A1

## CPC

- H02K 3/38: around winding heads, equalising connectors, or connections thereto
- H02K 13/04: Connections between commutator segments and windings
- H01R 39/32: Connections of conductor to commutator segment
- H02K 2203/06: Machines characterised by the wiring leads, i.e. conducting wires for connecting the winding terminations
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})
- H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS

## Abstract

An armature for a permanent magnet brushed motor includes a shaft, a number of silicon steel laminations circumferentially around the shaft, a commutator adjacent to an end of the shaft, and an enameled wire winding wound around the silicon steel laminations and the commutator. A plastic sleeve capable of withstanding high temperature is disposed between the commutator and the silicon steel laminations and adjacent to the commutator. A plastic member wraps around where the enameled wire winding winds the commutator, and fixedly attaching to the plastic sleeve. As such, the plastic member establishes a first point of attachment at where the enameled wire winding winds the commutator and a second point of attachment to the plastic sleeve. The problem of the enameled wire winding being loosed or broken due to the armature's high-speed rotation is prevented, thereby enhancing the motor's robustness and operational life.

## Claims

### Claim 1

An armature for a permanent magnet brushed motor, comprising a shaft, a plurality of silicon steel laminations circumferentially around a middle section of the shaft, a commutator configured adjacent to an end of the shaft, and an enameled wire winding wound around the silicon steel laminations and the commutator; characterized in that the armature further comprises
a plastic sleeve capable of withstanding high temperature disposed between the commutator and the silicon steel laminations and adjacent to the commutator; and
a plastic member wrapping around where the enameled wire winding winds the commutator, and fixedly attaching to the plastic sleeve.

### Claim 2 (depends on 1)

The armature according to claim 1, further comprising two insulating sleeves capable of withstanding high temperature mounted to the two ends of the silicon steel laminations, respectively.

### Claim 3 (depends on 1)

The armature according to claim 1, wherein the plastic member is made of epoxy resin.

### Claim 4 (depends on 1)

The armature according to claim 1, wherein the plastic member is made of silicone.