# US 2014/0197700 A1 · Rotor

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- Number: US 2014/0197700 A1
- Document ID: US20140197700A1
- Status: Published application
- Kind: A1
- Application number: 14/150,948
- Filed: 2014-01-09
- Published: 2014-07-17
- Earliest claimed: 2013-01-11
- Applicants: Bigbest Solutions, Inc.
- Inventors: Chao-Pi CHANG; Jia-Yuan LIANG
- Web page: https://patentgrep.com/patent/US20140197700A1

## CPC

- H02K 1/30: using intermediate parts, e.g. spiders
- H02K 1/278: Surface mounted magnets; Inset magnets
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})

## Abstract

A rotor includes an axle, a back iron unit, a magnet unit and an adhesive layer. The back iron unit includes annular inner and outer components, and a plurality of plastic components. The inner component is made from a non-metal material and is sleeved on the axle. The outer component is made from a magnetically permeable metal material and surrounds the inner component. The plastic components protrude from an outer surface of the outer component. The magnet unit has a cavity for receiving the back iron unit. The plastic components abut against a cavity-defining surface of the magnet unit that defines the cavity. The adhesive layer is formed in a space between the back iron unit and the magnet unit.

## Claims

### Claim 1

A rotor comprising:
an axle;
a back iron unit including an annular inner component that is made from a non-metal material, and that is sleeved on said axle, an annular outer component that is made from a magnetically permeable metal material and that surrounds said inner component, and a plurality of plastic components protruding from an outer surface of said outer component;
a magnet unit having a cavity for receiving said back iron unit, said plastic components abutting against a cavity-defining surface of said magnet unit that defines said cavity; and
an adhesive layer formed in a space between said back iron unit and said magnet unit.

### Claim 2 (depends on 1)

The rotor as claimed in claim 1, wherein said inner component is formed with a plurality of holes, which are annularly and radially arranged and each of which is fan-shaped.

### Claim 3 (depends on 1)

The rotor as claimed in claim 1, wherein the outer surface of said outer component of said back iron unit is formed with a plurality of embedding slots, each of said plastic components being secured in a respective one of said embedding slots.

### Claim 4 (depends on 1)

The rotor as claimed in claim 1, wherein the plastic components are symmetrically disposed around said outer component.