Motor and air conditioning apparatus

Patent metadata

Field	Value
Publication number	US-10855134-B2
Application number	US-201616090856-A
Country	US
Kind code	B2
Filing date	Jul 4, 2016
Priority date	Jul 4, 2016
Publication date	Dec 1, 2020
Grant date	Dec 1, 2020

Abstract

A motor includes a rotor having a shaft, a stator provided so as to surround the rotor, a first bearing and a second bearing rotatably supporting the shaft and disposed at a distance from each other in an axial direction of the shaft, a molded resin part covering the stator and having a bearing support part supporting the first bearing, a bracket attached to the molded resin part, supporting the second bearing, and having conductivity, and a conductive member provided in contact with both of the bearing support and the bracket.

First claim

What is claimed is:

1. A motor comprising:
a rotor having a shaft;
a stator provided so as to surround the rotor;
a first bearing and a second bearing rotatably supporting the shaft and disposed at a distance from each other in an axial direction of the shaft;
a molded resin part covering the stator and having a bearing support part supporting the first bearing;
a bracket attached to the molded resin part, supporting the second bearing, and having conductivity; and
a conductive member provided in contact with both of the bearing support part and the bracket,
wherein the bearing support part of the molded resin part has an outer circumferential surface having an annular shape about a central axis line of the shaft; and
wherein the conductive member has:
a first annular part contacting the outer circumferential surface of the bearing support part; and
a strip-shaped connecting part extending from the first annular part to the bracket and contacting the bracket.

2. The motor according to claim 1 , wherein the molded resin part has an insertion hole in which the rotor is inserted, and
wherein the bracket is attached to the insertion hole in which the rotor is inserted.

3. The motor according to claim 1 , wherein the bracket has a cylindrical part supporting the second bearing, and the cylindrical part has an outer circumferential surface having an annular shape about the central axis line of the shaft.

4. The motor according to claim 3 , wherein the conductive member has a second annular part contacting the outer circumferential surface of the cylindrical part, and
wherein the connecting part connects the first annular part and the second annular part to each other.

5. The motor according to claim 1 , wherein the connecting part of the conductive member extends along an outer circumferential surface of the molded resin part.

6. The motor according to claim 3 , wherein the connecting part of the conductive member does not reach the cylindrical part of the bracket.

7. The motor according to claim 1 , wherein the connecting part of the conductive member has an engaging part engaging with the bracket, and
wherein the bracket has an engaged part engaged with the engaging part of the conductive member.

8. The motor according to claim 7 , wherein the bracket has a disk part covering an insertion hole of the molded resin part in which the rotor is inserted, and
wherein the engaged part of the bracket is a groove part formed in the disk part.

9. The motor according to claim 1 , further comprising a board attached to the stator,
wherein the molded resin part is disposed so as to cover the stator and the board.

10. The motor according to claim 1 ,
wherein the conductive member is made of a metal.

11. The motor according to 10 claim 1 , wherein the bracket is made of a metal.

12. The motor according to claim 1 , wherein the molded resin part is made of a thermosetting resin.

13. The motor according to claim 1 , wherein the rotor has a resin part attached to the shaft, and a magnet supported by the resin part, and
wherein the stator has a stator core provided so as to surround the rotor, and a coil wound around the stator core.

14. An air conditioning apparatus comprising:
an outdoor unit having a first fan, and a first motor to drive the first fan;
an indoor unit having a second fan, and a second motor to drive the second fan; and
a refrigerant pipe connecting the outdoor unit and the indoor unit,
wherein at least one of the first motor and the second motor comprises:
a rotor having a shaft;
a stator provided so as to surround the rotor;
a first bearing and a second bearing rotatably supporting the shaft and disposed at a distance from each other in an axial direction of the shaft;
a molded resin part covering the stator and having a bearing support part supporting the first bearing;
a bracket attached to the molded resin part, supporting the second bearing, and having conductivity; and
a conductive member provided in contact with both of the bearing support part and the bracket,
wherein the bearing support part of the molded resin part has an outer circumferential surface having an annular shape about a central axis line of the shaft; and
wherein the conductive member has:
a first annular part contacting the outer circumferential surface of the bearing support part; and
a strip-shaped connecting part extending from the first annular part to the bracket and contacting the bracket.

Assignees

• Mitsubishi Electric Corp

Inventors

• Ishii Hiroyuki
• Oikawa Tomoaki
• Yamamoto Mineo
• Aso Hiroki
• Oya Junichiro
• Urabe Yuto

Classifications

• H02K5/08

  Insulating casings · CPC title

• H02K29/08

  using magnetic effect devices, e.g. Hall-plates, magneto-resistors (H02K29/12 takes precedence) · CPC title

• H02K5/15

  Mounting arrangements for bearing-shields or end plates · 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

• H02K5/1732 Primary

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