Rotating electric machine for vehicle

Patent metadata

Field	Value
Publication number	US-11515760-B2
Application number	US-202016862672-A
Country	US
Kind code	B2
Filing date	Apr 30, 2020
Priority date	Oct 31, 2017
Publication date	Nov 29, 2022
Grant date	Nov 29, 2022

Abstract

A rotating electric machine for a vehicle includes a rectifier fixed to an outer side of the frame member and constituting a rectification circuit which rectifies the alternating current generated by the stator; a battery terminal protruding from the rectifier and configured to be connected with a battery cable; an insulating member having a through hole in which the battery terminal is inserted; and a waterproof cap attached to the insulating member so as to cover a connection part of the battery terminal with the battery cable in a waterproof state. The insulating member includes an annular protruding part protruding inward from an inner peripheral surface of the through hole. The protruding part is in contact with an outer peripheral surface of the battery terminal in such a state that the protruding part is elastically deformed.

First claim

What is claimed is:

1. A rotating electric machine for a vehicle, the machine comprising:
a rotor fixed to a rotation shaft;
a stator for generating an alternating current as the rotor rotates;
a frame member for holding the rotor and the stator;
a rectifier fixed to an outer side of the frame member and constituting a rectification circuit which rectifies the alternating current generated by the stator;
a battery terminal protruding from the rectifier and configured to be connected with a battery cable;
an insulating member having an inner peripheral surface that forms a through hole in which the battery terminal is inserted, a gap being present between the inner peripheral surface of the insulating member and an outer peripheral surface of the battery terminal; and
a waterproof cap attached to the insulating member so as to cover a connection part of the battery terminal with the battery cable in a waterproof state, at least a portion of the connection part of the battery terminal being located within an internal volume of the waterproof cap, wherein
the insulating member includes an annular protruding part protruding inward from the inner peripheral surface and toward a central axis of the through hole, and
the protruding part spans the gap between the inner peripheral surface of the insulating member and the outer peripheral surface of the battery terminal so as to be in contact with the outer peripheral surface of the battery terminal in such a state that the protruding part is elastically deformed.

2. The rotating electric machine for a vehicle according to claim 1 , wherein
the protruding part is spaced, in an axial direction, from an end of the through hole located closest to the connection part of the battery terminal.

3. The rotating electric machine for a vehicle according to claim 1 , wherein
the protruding part is deformed along the outer peripheral surface of the battery terminal, and a tip of the protruding part is pointed toward a base side of the battery terminal.

4. The rotating electric machine for a vehicle according to claim 1 , wherein
the protruding part is provided with a deformable part which can be elastically deformed.

5. The rotating electric machine for a vehicle according to claim 4 , wherein
the deformable part is formed on a base side of the protruding part.

6. The rotating electric machine for a vehicle according to claim 1 , wherein
the protruding part is provided at an end of the through hole located, in an axial direction, closest to the connection part of the battery terminal, and
a section of the battery terminal that comes into contact with the protruding part has a reduced diameter so that the outer peripheral surface of the battery terminal includes (i) a pressure contact face, a protruding end face of the protruding part being pressed against the pressure contact face, and (ii) a positioning face which comes into contact with a face intersecting with the protruding end face of the protruding part.

7. The rotating electric machine for a vehicle according to claim 1 , wherein
the insulating member includes (i) a rear cover, which covers the rectifier and has a through hole into which the battery terminal is inserted, and (ii) a protection member assembled to the through hole of the rear cover and provided with the through hole of the insulating member,
the protection member includes a cylindrical part, an outer periphery of which has a stepped shape, and a part of the cylindrical part with a reduced outer diameter serves as a held part which is held in the through hole of the rear cover, and
the protruding part is provided at a position in an axial direction of the through hole where the held part is held by an inner peripheral surface of the rear cover that forms the through hole of the rear cover.

8. The rotating electric machine for a vehicle according to claim 1 , wherein
a plurality of protruding parts are provided along an axial direction of the through hole.

9. The rotating electric machine for a vehicle according to claim 8 , wherein
center positions of circles drawn by inner peripheral edges of the protruding parts are different from each other.

10. The rotating electric machine for a vehicle according to claim 1 , wherein
the protruding part is formed of a material including an elastomer.

11. The rotating electric machine for a vehicle according to claim 1 , wherein
the rotating electric machine is assembled to the vehicle such that the battery terminal extends in a direction intersecting with a direction of gravity, and
a lower position of the protruding part in the direction of gravity is closer to a base side than is an upper position of the protruding part.

Assignees

• Denso Corp

Inventors

• Morishita Kazuki

Classifications

• H02K11/05 Primary

  Rectifiers associated with casings, enclosures or brackets · CPC title

• H02K5/10

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

• H01R13/5205

  Sealing means between cable and housing, e.g. grommet (H01R13/5221 takes precedence) · CPC title

• H01R4/34

  Conductive members located under head of screw · CPC title

• H02K5/225 Primary

  Terminal boxes or connection arrangements (specially adapted for submersible motors H02K5/132) · CPC title