Motor driven compressor

Patent metadata

Field	Value
Publication number	US-9520759-B2
Application number	US-201314070037-A
Country	US
Kind code	B2
Filing date	Nov 1, 2013
Priority date	Nov 15, 2012
Publication date	Dec 13, 2016
Grant date	Dec 13, 2016

Abstract

A motor-driven compressor that includes a metal housing accommodating a compression unit and an electric motor, a cover coupled to the housing, wherein the cover includes a resin portion and a metal shield, and the shield blocks electromagnetic noise, and a bolt that couples the cover to the housing. The housing and the cover define an accommodating chamber that accommodates a motor driving circuit that drives the electric motor. The cover includes an insertion hole into which the bolt is insertable. The shield includes a seat that surrounds the insertion hole and is held between the bolt and the housing. The cover is configured to allow for an axial force of the bolt to be applied to the seat and not to the resin portion.

First claim

The invention claimed is:

1. A motor-driven compressor comprising:
a metal housing accommodating a compression unit and an electric motor; a cover coupled to the housing, wherein the cover includes a resin portion and a metal shield, and the shield blocks electromagnetic noise; and
a bolt that couples the cover to the housing, wherein
the housing and the cover define an accommodating chamber that accommodates a motor driving circuit that drives the electric motor,
the cover includes an insertion hole into which the bolt is insertable,
the shield includes a seat that surrounds the insertion hole and is held between the bolt and the housing without the resin portion being held therebetween so that an axial force of the bolt is applied to the seat and not to the resin portion.

2. The motor-driven compressor according to claim 1 wherein,
the insertion hole includes a first insertion hole, which is formed in the shield, and a second insertion hole, which is formed in the resin portion,
the second insertion hole has a larger diameter than the first insertion hole,
the motor-driven compressor further comprises a spacer arranged in the second insertion hole,
the bolt is inserted into the spacer,
the spacer receives the axial force of the bolt and is held between the bolt and the seat, and
the spacer includes an end surface that contacts the seat.

3. The motor-driven compressor according to claim 2 , wherein the spacer is integrally fixed to the resin portion.

4. The motor-driven compressor according to claim 2 , further comprising an annular first sealing member, wherein
the bolt includes a shaft and a head,
the first sealing member surrounds the shaft and is held between the spacer and the head of the bolt in an axial direction of the bolt.

5. The motor-driven compressor according to claim 1 , wherein
the insertion hole includes a first insertion hole, which is formed in the shield, and a second insertion hole, which is formed in the resin portion,
the bolt includes a shaft, which is inserted into the first insertion hole, a large diameter portion, which is arranged in the second insertion hole and has a larger outer diameter than the shaft, and a head,
the shaft and the head are located at opposite sides of the large diameter portion,
the bolt includes a first step, which is located between the shaft and the large diameter portion, and a second step, which is located between the large diameter portion and the head, and
the first step is in contact with the seat.

6. The motor-driven compressor according to claim 1 , wherein the shield is inside the resin portion.

7. A motor-driven compressor comprising:
a metal housing accommodating a compression unit and an electric motor;
a cover coupled to the housing, wherein the cover includes a resin portion and a metal shield, and the shield blocks electromagnetic noise;
a bolt that couples the cover to the housing, wherein
the housing and the cover define an accommodating chamber that accommodates a motor driving circuit that drives the electric motor,
the cover includes an insertion hole into which the bolt is insertable,
the shield includes a seat that surrounds the insertion hole and is held between the bolt and the housing,
the cover is configured to allow for an axial force of the bolt to be applied to the seat and not to the resin portion,
the insertion hole includes a first insertion hole, which is formed in the shield, and a second insertion hole, which is formed in the resin portion,
the bolt includes a shaft, which is inserted into the first insertion hole, a large diameter portion, which is arranged in the second insertion hole and has a larger outer diameter than the shaft, and a head,
the shaft and the head are located at opposite sides of the large diameter portion,
the bolt includes a first step, which is located between the shaft and the large diameter portion, and a second step, which is located between the large diameter portion and the head, and
the first step is in contact with the seat; and

an annular second sealing member arranged in the second insertion hole around the large diameter portion.

8. The motor-driven compressor according to claim 7 , wherein the second sealing member is pressed by the second step toward the housing and elastically deformed.

9. The motor-driven compressor according to claim 8 , wherein the second sealing member is held between the second step and the shield in an axial direction of the bolt.

10. The motor-driven compressor according to claim 8 , wherein the second sealing member is held between the second step and the resin portion in the axial direction of the bolt.

11. A motor-driven compressor comprising:
a metal housing accommodating a compression unit and an electric motor;
a cover coupled to the housing, wherein the cover includes a resin portion and a metal shield, and the shield blocks electromagnetic noise; and
a bolt that couples the cover to the housing, wherein
the housing and the cover define an accommodating chamber that accommodates a motor driving circuit that drives the electric motor,
the cover includes an insertion hole into which the bolt is insertable,
the shield includes a seat that surrounds the insertion hole and is held between the bolt and the housing,
the cover is configured to allow for an axial force of the bolt to be applied to the seat and not to the resin portion, and
a surface of the seat is in direct contact with the housing.

Assignees

• Toyota Jidoshokki Kk

Inventors

• Yano Junya
• Kinoshita Yusuke
• Egawa Satoru
• Kuroki Kazuhiro
• Suitou Ken

Classifications

• F04B35/04

  the means being electric · CPC title

• H02K5/24

  specially adapted for suppression or reduction of noise or vibrations · CPC title

• H02K11/022 Primary

  Electricity · mapped topic

• H02K11/02

  for suppression of electromagnetic interference · CPC title

• F04C29/00

  Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00 · CPC title