Inner-rotor motor

Patent metadata

Field	Value
Publication number	US-10122225-B2
Application number	US-201615131108-A
Country	US
Kind code	B2
Filing date	Apr 18, 2016
Priority date	May 6, 2015
Publication date	Nov 6, 2018
Grant date	Nov 6, 2018

Abstract

An inner-rotor motor includes a separating member, a stator and a rotor. The separating member is made of an insulating material and includes a first separating part and a second separating part. The separating member includes at least one engaging portion extending along an axial direction of the inner-rotor motor. The stator includes an iron core received in a space jointly defined by the first and second separating parts. The iron core includes at least one engaging groove arranged on an outer surface thereof and extending along the axial direction of the inner-rotor motor. The at least one engaging portion is received in the at least one engaging groove. The rotor is rotatably coupled to the separating member. As such, a convenient assembly and reduced volume of the inner-rotor motor are provided.

First claim

What is claimed is:

1. An inner-rotor motor comprising:
a separating member made of an insulating material and comprising a first separating part and a second separating part, wherein the separating member comprises at least one engaging portion extending along an axial direction of the inner-rotor motor, wherein the first separating part comprises a base plate extending along a radial direction of the inner-rotor motor, wherein a lateral wall is connected to the base plate and extends along the axial direction of the inner-rotor motor towards the second separating part, wherein the at least one engaging portion comprises a plurality of first engaging portions arranged on the lateral wall of the first separating part, wherein the first separating part comprises a first channel arranged at one of the plurality of first engaging portions, wherein the second separating part comprises a base plate extending along the radial direction of the inner-rotor motor, wherein a lateral wall is connected to the base plate of the second separating part and extends along the axial direction of the inner-rotor motor towards the first separating part, wherein the at least one engaging portion further comprises a plurality of second engaging portions aligned with the plurality of first engaging portions along the axial direction of the inner-rotor motor, wherein the plurality of second engaging portions is arranged on the lateral wall of the second separating part and extends along the axial direction of the inner-rotor motor, and wherein the second separating part comprises a second channel arranged at one of the plurality of second engaging portions;
a stator comprising an iron core received in a space jointly defined by the first and second separating parts, wherein the iron core comprises a plurality of engaging grooves arranged on an outer surface thereof and extending along the axial direction of the inner-rotor motor, and wherein the plurality of first engaging portions and the plurality of second engaging portions are received in the plurality of engaging grooves;
a rotor rotatably coupled to the separating member; and
a metallic housing receiving the separating member.

2. The inner-rotor motor as claimed in claim 1 , wherein the first separating part comprises a first coupling portion arranged in the first channel, and wherein the second separating part comprises a second coupling portion arranged in the second channel and coupled to the first coupling portion.

3. The inner-rotor motor as claimed in claim 2 , wherein the first coupling portion is in a form of a fastener, wherein the second coupling portion is in a form of a fastening groove, and wherein the first and second coupling portions are coupled to each other via the fastener and the fastening groove.

4. The inner-rotor motor as claimed in claim 1 , wherein the rotor comprises a shaft arranged at a center of the iron core, wherein the plurality of engaging grooves extends towards the shaft, and wherein the plurality of first engaging portions and the plurality of second engaging portions protrude inwards towards the iron core.

5. The inner-rotor motor as claimed in claim 1 , wherein a quantity of the plurality of first engaging portions is equal to or larger than a quantity of the plurality of second engaging portions.

6. The inner-rotor motor as claimed in claim 1 , wherein a screwing member extends through the metallic housing, the first channel and the second channel to fasten the separating member in the metallic housing.

7. The inner-rotor motor as claimed in claim 6 , wherein the metallic housing comprises a body in a form of a hollow cylinder having two openings formed at two opposite ends thereof, wherein the body encloses the first and second separating parts of the separating member, wherein two lids are arranged respectively at the two openings of the body, wherein each of the two lids comprises a fastening hole arranged at an outer area adjacent to an outer edge thereof, wherein the fastening hole is aligned with the one of the plurality of first engaging portions and the one of the plurality of second engaging portions along the axial direction of the inner-rotor motor, and wherein the screwing member extends through the fastening holes of the two lids to fix the separating member between the two lids.

8. An inner-rotor motor comprising:
a separating member made of an insulating material and comprising a first separating part and a second separating part, wherein the separating member comprises at least one engaging portion extending along an axial direction of the inner-rotor motor, wherein the first separating part comprises a base plate extending along a radial direction of the inner-rotor motor, wherein a lateral wall is connected to the base plate and extends along the axial direction of the inner-rotor motor towards the second separating part, wherein the at least one engaging portion comprises a plurality of first engaging portions arranged on the lateral wall of the first separating part, wherein the first separating part comprises a first channel arranged at one of the plurality of first engaging portions, wherein the second separating part comprises a base plate extending along the radial direction of the inner-rotor motor, wherein a lateral wall is connected to the base plate of the second separating part and extends along the axial direction of the inner-rotor motor towards the first separating part, and wherein the at least one engaging portion further comprises a plurality of second engaging portions aligned with the plurality of first engaging portions along the axial direction of the inner-rotor motor, wherein the plurality of second engaging portions is arranged on the lateral wall of the second separating part and extends along the axial direction of the inner-rotor motor, and wherein the second separating part comprises a second channel arranged at one of the plurality of second engaging portions;
a stator comprising an iron core received in a space jointly defined by the first and second separating parts, wherein the iron core comprises a plurality of engaging grooves arranged on an outer surface thereof and extending along the axial direction of the inner-rotor motor, and wherein the plurality of first engaging portions and the plurality of second engaging portions are received in the plurality of engaging grooves; and
a rotor rotatably coupled to the separating member,
wherein the separating member further comprises a through-hole arranged at the first separating part or the second separating part, wherein a wire extends out of the separating member via the through-hole, and wherein the wire is received in the first channel or the second channel.

9. The inner-rotor motor as claimed in claim 8 , wherein the rotor comprises a shaft arranged at a center of the iron core, wherein the plurality of engaging grooves extends towards the shaft, and wherein the plurality of first engaging portions and the plurality of second engaging portions protrude inwards towards the iron core.

10. The inner-rotor motor as claimed in claim 8 , further comprising a circuit board received in the space defined by the first and second separating parts together, wherein one end of the wire is electrically connected to the circuit board, and wherein another end of the wire extends along the first channel or the second channel.

11. The inner-rotor motor as claimed in claim 8 , wherein a coil is arranged around an outer periphery of the iron core of the stator, wherein one end of the wire is electrically connected to the coil, and wherein another end of the wire extends along the first channel or the second channel.

12. The inner-rotor moto

Assignees

• Sunonwealth Electric Machine Ind Co Ltd

Inventors

• Horng Alex
• Yin Tso-Kuo
• Shan Duo-Nian

Classifications

• H02K5/22

  Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes · CPC title

• H02K5/04

  Casings or enclosures characterised by the shape, form or construction thereof · CPC title

• H02K5/1732

  radially supporting the rotary shaft at both ends of the rotor (H02K5/1737 takes precedence) · CPC title

• H02K1/185 Primary

  to outer stators · CPC title

• H02K11/33

  Drive circuits, e.g. power electronics (H02K11/38 takes precedence) · CPC title