Bus bar unit and motor

Patent metadata

Field	Value
Publication number	US-11075562-B2
Application number	US-201816487510-A
Country	US
Kind code	B2
Filing date	Mar 13, 2018
Priority date	Mar 31, 2017
Publication date	Jul 27, 2021
Grant date	Jul 27, 2021

Abstract

A bus bar unit includes a bus bar holder, a bus bar extending in a direction perpendicular to an axial direction and fixed to the bus bar holder, and an external connection terminal connected to the bus bar and extending to one side in the axial direction from the bus bar. The external connection terminal has a plate shape. The external connection terminal includes a first plate portion extending toward one side in the axial direction and a second plate portion that is positioned on a base end side of the first plate portion, is provided with a connection portion connected to the bus bar, and faces a direction different from the first plate portion. The first plate portion and the second plate portion are connected to each other in a bending line extending in the axial direction, and the second plate portion extends from one surface side to the other surface side of the first plate portion when viewed in the axial direction.

First claim

The invention claimed is:

1. A bus bar unit that is provided in a motor, the bus bar unit comprising:
a bus bar holder provided on one side in an axial direction of a stator disposed in an annular shape around a central axis extending in a vertical direction;
a bus bar extending in a direction perpendicular to the axial direction and fixed to the bus bar holder; and
an external connection terminal connected to the bus bar and extending to one side in the axial direction from the bus bar; wherein
the external connection terminal has a plate shape, and includes a first plate portion extending toward one side in the axial direction, and a second plate portion that is positioned on a base end side of the first plate portion, is provided with a connection portion connected to the bus bar, and faces a direction different from the first plate portion;
the first plate portion and the second plate portion are connected to each other in a bending line extending in the axial direction; and
the second plate portion extends from one surface side to the other surface side of the first plate portion when viewed in the axial direction.

2. The bus bar unit of claim 1 , wherein the first plate portion extends from one surface side to the other surface side of the second plate portion when viewed in the axial direction.

3. The bus bar unit of claim 1 , wherein
the bus bar unit includes the plurality of bus bars including a first bus bar and a second bus bar;
the second plate portion includes the plurality of connection portions including a first connection portion connected to the first bus bar and a second connection portion connected to the second bus bar; and
the first connection portion is located on one surface side of the first plate portion, and the second connection portion is located on the other surface side of the first plate portion, when viewed in the axial direction.

4. The bus bar unit of claim 3 , wherein
axial positions of the first bus bar and the second bus bar are different from each other;
the first connection portion is a first convex portion protruding downwardly and is inserted into a first through hole provided in the first bus bar; and
the second connection portion is a second convex portion protruding downwardly and is inserted into a second through hole provided in the second bus bar.

5. The bus bar unit of claim 1 , wherein the first plate portion includes a pair of protrusions protruding to both sides in a width direction.

6. The bus bar unit of claim 5 , wherein the bus bar holder includes a terminal holding portion to hold the pair of protrusions.

7. The bus bar unit of claim 6 , wherein
the terminal holding portion includes a pair of holding grooves extending along the axial direction; and
the protrusion is inserted into the holding groove.

8. A motor comprising:
the bus bar unit of claim 1 ;
the stator around which a coil wire is wound; and
a rotor facing the stator in the radial direction through a gap.

Assignees

• Nidec Corp

Inventors

• Yamashita Yoshiaki
• Takahashi Shunsuke
• Atarashi Takao

Classifications

• H02K2203/09

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

• H02K3/522 Primary

  for generally annular cores with salient poles · CPC title

• B62D5/14

  Rotary motor · CPC title