Electric motor and blowing apparatus

Patent metadata

Field	Value
Publication number	US-10298096-B2
Application number	US-201515322632-A
Country	US
Kind code	B2
Filing date	Jun 12, 2015
Priority date	Jun 30, 2014
Publication date	May 21, 2019
Grant date	May 21, 2019

Abstract

An electric motor includes a shaft extending along an axial direction, a stator, a rotor arranged farther away from the shaft than the stator in a radial direction of the shaft, a stator fixing part fixed to the shaft and fixed to the stator, and a rotor fixing part facing the stator fixing part and the stator with an air gap formed between in the axial direction. The rotor fixing part is rotatably coupled to the shaft and fixed to the rotor. A rotor hole is formed in the rotor fixing part. The rotor hole passes through the rotor fixing part to be communicated with the air gap. A stator hole is formed in the stator fixing part. The stator hole passes through the stator fixing part to be communicated with the rotor hole with the air gap formed between.

First claim

What is claimed is:

1. An electric motor, comprising:
a shaft extending along an axial direction;
a stator;
a rotor arranged farther away from said shaft than said stator in a radial direction of said shaft;
a stator fixing part fixed to said shaft and fixed to said stator;
a rotor fixing part facing said stator fixing part and said stator with an air gap formed therebetween in said axial direction, said rotor fixing part being rotatably coupled to said shaft and fixed to said rotor,
a rotor hole being formed in said rotor fixing part, said rotor hole passing through said rotor fixing part to be communicated with said air gap, and
a stator hole being formed in said stator fixing part, said stator hole passing through said stator fixing part to be communicated with said rotor hole and with said air gap formed therebetween.

2. The electric motor according to claim 1 , further comprising:
a protruding part disposed between said stator and said rotor fixing part and protruding from one of said stator and said rotor fixing part toward an other one of said stator and said rotor fixing part,
said rotor hole being is located nearer to said shaft than said protruding part.

3. The electric motor according to claim 2 , wherein
said protruding part is fixed to said stator and faces said rotor fixing part with an air gap formed therebetween.

4. The electric motor according to claim 3 , further comprising:
a bearing rotatably attaching said shaft and said rotor fixing part,
said stator including an inner peripheral surface that faces said shaft with an air gap formed therebetween in said radial direction.

5. The electric motor according to claim 4 , wherein
said stator hole is formed in said stator fixing part in a position nearer to said shaft than said inner peripheral surface.

6. The electric motor according to claim 3 , wherein
said stator hole is located nearer to said shaft than said rotor hole in said radial direction.

7. A blowing apparatus including the electric motor according to claim 3 , the blowing apparatus further comprising:
a fan fixed to said rotor fixing part in order to draw air from said rotor hole.

8. The electric motor according to claim 2 , further comprising:
a bearing rotatably attaching said shaft and said rotor fixing part,
said stator including an inner peripheral surface that faces said shaft with an air gap formed therebetween in said radial direction.

9. The electric motor according to claim 8 , wherein
said stator hole is formed in said stator fixing part in a position nearer to said shaft than said inner peripheral surface.

10. The electric motor according to claim 2 , wherein
said stator hole is located nearer to said shaft than said rotor hole in said radial direction.

11. A blowing apparatus including the electric motor according to claim 2 , the blowing apparatus further comprising:
a fan fixed to said rotor fixing part in order to draw air from said rotor hole.

12. The electric motor according to claim 1 , wherein
said stator hole is located nearer to said shaft than said rotor hole in said radial direction.

13. A blowing apparatus including the electric motor according to claim 1 , the blowing apparatus further comprising:
a fan fixed to said rotor fixing part in order to draw air from said rotor hole.

14. The electric motor according to claim 1 , further comprising:
rotatably attaching said shaft and said rotor fixing part,
said stator including an inner peripheral surface that faces said shaft with an air gap formed therebetween in said radial direction.

15. The electric motor according to claim 14 , wherein
said stator hole is formed in said stator fixing part in a position nearer to said shaft than said inner peripheral surface.

Assignees

• Daikin Ind Ltd

Inventors

• Takayama Yoshinori
• Tsukida Junji

Classifications

• H02K7/086

  radially supporting the rotor around a fixed spindle; radially supporting the rotor directly (H02K7/09 takes precedence) · CPC title

• H02K9/06 Primary

  with fans or impellers driven by the machine shaft · CPC title

• H02K7/14

  Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06) · CPC title

• H02K5/20

  with channels or ducts for flow of cooling medium · CPC title

• H02K5/207

  with openings in the casing specially adapted for ambient air · CPC title