Power feed section structure of electric power assisting motor apparatus

Patent metadata

Field	Value
Publication number	US-9899891-B2
Application number	US-201314784206-A
Country	US
Kind code	B2
Filing date	Nov 19, 2013
Priority date	Jun 6, 2013
Publication date	Feb 20, 2018
Grant date	Feb 20, 2018

Abstract

The connection terminal and the power supply terminal are held by a common holding member made of a resin. The power supply terminal includes a press-fitting portion press-fitted into a press-fitted portion of the holding member. The press-fitted portion of the holding member has a shape that is long in a plate width direction of the power supply terminal and short in a plate thickness direction of the power supply terminal. Assuming that a dimension of each of both end portions of the press-fitted portion in the plate width direction of the power supply terminal is defined as L 1 , a dimension of a center portion of the press-fitted portion is defined as L 2 , and a plate thickness of the power supply terminal is defined as T, L 2 <T<L 1 is satisfied under a non-press-fitted state.

First claim

The invention claimed is:

1. A power supply unit structure of an electric power assist motor apparatus, comprising:
a connection terminal to be connected to a coil of an electric motor for outputting an assist torque; and
a power supply terminal to be connected to a control circuit unit for controlling drive of the electric motor,
wherein the connection terminal and the power supply terminal are held by a common holding member made of a resin,
wherein the power supply terminal comprises a press-fitting portion press-fitted into a press-fitted portion of the holding member,
wherein the press-fitted portion of the holding member has a shape that is long in a plate width direction of the power supply terminal and short in a plate thickness direction of the power supply terminal, and
wherein, assuming that a dimension of each of both end portions of the press-fitted portion in the plate width direction of the power supply terminal is defined as L 1 , a dimension of a center portion of the press-fitted portion in the plate width direction of the power supply terminal is defined as L 2 , and a plate thickness of the power supply terminal is defined as T, the dimension L 1 , the dimension L 2 , and the plate thickness T satisfy L 2 <T<L 1 under a non-press-fitted state.

2. A power supply unit structure of an electric power assist motor apparatus according to claim 1 ,
wherein a part of the holding member in which the press-fitted portion is formed has one surface side being an opening side and another surface side being a closing side, and
wherein the press-fitted portion comprises a bottomed hole portion.

3. A power supply unit structure of an electric power assist motor apparatus according to claim 1 , wherein the press-fitted portion of the holding member comprises a through hole.

4. A power supply unit structure of an electric power assist motor apparatus according to claim 2 , wherein the press-fitted portion of the holding member comprises a tapered portion formed on a press-fitting inlet side thereof, which is widened from a hole-depth side toward an opening.

5. A power supply unit structure of an electric power assist motor apparatus according to claim 1 ,
wherein a pair of back surface grooves is formed in the holding member on an opposite side to the press-fitting inlet side of the press-fitted portion,
wherein the back surface grooves are arranged respectively on both sides of the press-fitted portion in the plate thickness direction of the power supply terminal, and
wherein the pair of back surface grooves is formed apart from the press-fitted portion in the plate thickness direction of the power supply terminal when viewed in a press-fitting direction in a projected manner.

6. A power supply unit structure of an electric power assist motor apparatus according to claim 1 ,
wherein back surface holes are formed on both sides of the press-fitted portion in the plate thickness direction of the power supply terminal, respectively, and
wherein the pair of back surface holes is formed apart from the press-fitted portion in the plate thickness direction of the power supply terminal when viewed in a press-fitting direction in a projected manner.

7. A power supply unit structure of an electric power assist motor apparatus according to claim 1 , wherein the press-fitting portion of the power supply terminal comprises a tapered portion narrowed toward a distal end thereof.

8. A power supply unit structure of an electric power assist motor apparatus according to claim 7 , wherein the press-fitting portion of the power supply terminal comprises a circular arc portion on a part connecting a terminal end of a widened portion of the tapered portion and a portion connected to the tapered portion.

Assignees

• Mitsubishi Electric Corp

Inventors

• Sawada Kazuki
• Takashima Kazuhisa
• Nishikawa Hideya
• Funabiki Yusuke

Classifications

• H02K3/522 Primary

  for generally annular cores with salient poles · CPC title

• H02K5/08

  Insulating casings · CPC title

• H02K2203/06

  Machines characterised by the wiring leads, i.e. conducting wires for connecting the winding terminations · CPC title

• H02K2203/09

  Machines characterised by wiring elements other than wires, e.g. bus rings, for connecting the winding terminations · CPC title

• H02K5/225 Primary

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