Rotating electric machine

• US 20040189120A1
• Filed: 03/03/2004
• Published: 09/30/2004
• Est. Priority Date: 03/27/2003
• Status: Active Grant

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Takashima, Kazuhisa, Shibata, Akihiro
• Granted Patent: US 6,870,298 B2
• Time in Patent Office: Days
• US Class Current: 310/89
• CPC Class Codes: H02K 5/148 Slidably supported brushes
• CPC Class Codes: H02K 5/225 Terminal boxes or connection arrangements specially adapted for submersible motors H02K5/132

Abstract

A rotating electric machine, including: a bowl-like housing having a through hole penetrated by a shaft and having a cutout portion in a part of an opening portion; a commutator fixed to the shaft; a base fixed to the housing by a clamp screw and having a tapped hole through which the clamp screw is inserted with a play; a brush disposed in the base and rubbing against the commutator; a plate having a joint portion to which a lead wire led outside is welded and fixed to the base; a grommet penetrated by the lead wire and engaged in the cutout portion of the housing; and a positioning unit which positions the lead wire to be welded in the joint portion.

Claims

1. A rotating electric machine, comprising:

a bowl-like housing having a through hole penetrated by a shaft and having a cutout portion in a part of an opening portion;

a commutator fixed to the shaft;

a base fixed to the housing by a clamp screw and having a tapped hole through which the clamp screw is inserted with a play;

a brush disposed in the base and rubbing against the commutator;

a plate having a joint portion to which a lead wire led outside is welded and fixed to the base;

a grommet penetrated by the lead wire and engaged in the cutout portion of the housing; and

a positioning unit which positions the lead wire to be welded in the joint portion.

2. The rotating electric machine according to claim 1, wherein the positioning unit is made of a resin material for forming the base and formed integrally with the base.

3. The rotating electric machine according to claim 1, wherein the positioning unit has a tapered face for leading the lead wire to a welding position.

4. The rotating electric machine according to claim 1, wherein the lead wire has a conductor including a plurality of element wires;

and

top end portions of the plurality of element wires are welded to be fixed to the joint portion while a covering thereon is removed.

5. The rotating electric machine according to claim 1,

wherein the lead wire includes a plurality of lead wires;

the positioning unit includes a plurality of positioning units;

an interval between the lead wires penetrating through the grommet and an interval between the positioning units are equal.

6. The rotating electric machine according to claim 1, wherein the grommet has a thinned portion around the outer circumference of the lead wire penetrating through the grommet on the side of the joint portion.

7. The rotating electric machine according to claim 1, further comprising:

an elastic body;

wherein the base is fixed via the elastic body to the housing.

8. The rotating electric machine according to claim 1, wherein the plate is insert molded into the base by a resin material forming the base;

and

the joint portion being disposed inside an outer circumferential face of the base.

9. The rotating electric machine according to claim 1, the rotating electric machine is a brush motor employed for an electric power steering apparatus.