Rotating electric machine with sealing members

Patent metadata

Field	Value
Publication number	US-9831738-B2
Application number	US-201414525565-A
Country	US
Kind code	B2
Filing date	Oct 28, 2014
Priority date	Oct 30, 2013
Publication date	Nov 28, 2017
Grant date	Nov 28, 2017

Abstract

A rotating electric machine includes a cover formed in a cylindrical shape and extending in an axial direction to cover the controller section, a lid section disposed inside of the cover body to seal the cover body, a first sealing member compressed between the lid section and the cover, and a second sealing member compressed in a different direction than the first sealing member between the cover and the first frame or the second frame. The rotating electric machine also includes a tab formed on an outer periphery of the first frame or the second frame, and a claw extending from the one end of the cover body and engageable with the tab to hold the sealing members in a compressed state. As a result, the rotating electric machine is sealed from dust and water.

First claim

What is claimed is:

1. A rotating electric machine comprising:
a motor section including an annular stator, a winding wire wound on the stator, and a rotor rotatably disposed inside the stator;
a shaft disposed at a center of rotation of the rotor;
a controller section disposed in an axially non-overlapping position with the stator and controlling a supply of electric power to the winding wire which provides a drive control of the motor section;
a first frame disposed between the motor section and the controller section;
a second frame disposed on a side of the motor section opposite to the first frame, in which the motor section is interposed between the first frame and the second frame;
a cover having a cover body with a cylindrical shape that extends in an axial direction of the stator toward (i) one end of the cover body and (ii) the first frame or the second frame, the cover covering at least the controller section;
a lid section disposed on a side of the controller section opposite to the motor section and inside of the cover body, the lid section sealing an other end of the cover body;
a first sealing member compressed between the lid section and the cover;
a second sealing member compressed between (i) the one end of the cover and (ii) the first frame or the second frame, the second sealing member having a direction of compression of the second sealing member that is different than a direction of compression of the first sealing member; and
a fastener (i) fastening the cover onto at least one of the first frame, the second frame, or the lid section, and (ii) maintaining the first sealing member and second sealing member in a compressed state, wherein the fastener includes a tab formed on an outer periphery of the first frame or the second frame and a claw that extends from the one end of the cover body and is configured to engage with the tab, and
wherein the tab and the claw are circumferentially adjacent to each other.

2. The rotating electric machine of claim 1 , wherein
the direction of compression of the first sealing member is parallel with an axis of the cover body, and
the direction of compression of the second sealing member is perpendicular to the axis of the cover body.

3. The rotating electric machine of claim 2 , wherein
the cover includes an inside annular section that extends from the other end of the cover body toward the one end of the cover,
the first sealing member is disposed between the lid section and the inside annular section, and
the second sealing member is disposed between (i) the first frame or the second frame and (ii) the one end of the cover.

4. The rotating electric machine of claim 1 , wherein
the direction of compression of the first sealing member is perpendicular to an axis of the cover body, and
the direction of compression of the second sealing member is parallel with the axis of the cover body.

5. The rotating electric machine of claim 4 , wherein
the cover includes an outer flange that extends in a radially outward direction from the one end of the cover body,
the first sealing member is disposed at a position between the lid section and the other end of the cover, and
the second sealing member is disposed at a position between (i) the first frame or the second frame and (ii) the outer flange.

6. The rotating electric machine of claim 1 , wherein
the lid section has a groove on a surface of the lid section facing away from the motor section and toward the cover, and
the cover has an extension engaged with the groove and configured to prevent a radially-outwardly expanding deformation of the cover relative to the lid section and a shifting movement of the cover toward the motor section relative to the lid section.

7. The rotating electric machine of claim 1 , wherein
the fastener is a screw that fastens the cover to the lid section, the first frame, or the second frame.

8. The rotating electric machine of claim 1 , further comprising:
a connector connected to at least one of
(i) a power supply wire harness extending from the lid section in a direction that is opposite to the controller section, the power supply wire harness supplying an electric power for the winding wire, or
(ii) a control wire harness that transmits a signal to the controller section.

9. The rotating electric machine of claim 1 , further comprising at least one screw and corresponding hole through one of the lid section and the cover, wherein the screw passes through the hole to fix the lid section to the cover and the hole is located outside of the first sealing member with respect to a sealing direction of the first sealing member.

10. The rotating electric machine of claim 1 , wherein the claw comprises a substantially L-shaped portion.

11. The rotating electric machine of claim 10 , further comprising a second substantially L-shaped portion that is a mirror image of and adjacent to the substantially L-shaped portion.

Assignees

• Denso Corp

Inventors

• Yamasaki Masashi
• Yamashita Daisuke

Classifications

• H02K5/15

  Mounting arrangements for bearing-shields or end plates · CPC title

• H02K5/10 Primary

  with arrangements for protection from ingress, e.g. water or fingers · CPC title

• H02K11/33

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

• H02K11/38

  Control circuits or drive circuits associated with geared commutator motors of the worm-and-wheel type · CPC title

• H02K11/028

  Suppressors associated with the rotor · CPC title