Stator of motor and inner rotor-type motor including stator

Patent metadata

Field	Value
Publication number	US-10236740-B2
Application number	US-201615354318-A
Country	US
Kind code	B2
Filing date	Nov 17, 2016
Priority date	Dec 2, 2015
Publication date	Mar 19, 2019
Grant date	Mar 19, 2019

Abstract

A stator of a motor comprises a terminal. The terminal includes: a leg portion, a hook portion including an open end and disposed on a core outer circumference part at a position corresponding to one of core tooth parts in a circumferential direction, and a coupling portion extending from the leg portion in the circumferential direction along the core outer circumference part and connected to the hook portion. An end portion of a coil is connected to the hook portion. The coupling portion of the terminal is bent to locate the hook portion radially outside the core tooth parts.

First claim

What is claimed is:

1. A stator of a motor comprising:
a core section including a core outer circumference part forming an annular shape and core tooth parts projecting radially inward from the core outer circumference part;
an insulator covering at least an outer circumference of each of the core tooth parts and an end face in an axial direction of the core outer circumference part;
a coil wound on each of the core tooth parts via the insulator; and
a terminal attached to the core outer circumference part via the insulator, an end portion of the coil being connected to the terminal, wherein
the terminal includes:
at least one leg portion extending in the axial direction;
at least one hook portion including an open end opened in the axial direction and disposed on the core outer circumference part at a position corresponding to one of the core tooth parts in a circumferential direction, the end portion of the coil being connected to the hook portion; and
at least one coupling portion extending from the leg portion in the circumferential direction along the core outer circumference part and connected to the hook portion,

the insulator includes at least one terminal holding portion, to which the leg portion is attached, at a position in the end face of the core outer circumference part in a position not corresponding to the core tooth parts in the circumferential direction and a position corresponding to the leg portion of the terminal,
the hook portion includes:
a base end portion located on an outer side in a radial direction;
a side piece portion located on an inner side in the radial direction to be arranged side by side with the base end portion; and
a connecting portion connecting an end portion of the base end portion and an end portion of the side piece portion located on an opposite side of the open end and forming a closed end, and

the coupling portion of the terminal is bent to locate the hook portion radially outside the core tooth parts.

2. The stator of the motor according to claim 1 , wherein
the core section further includes core piece main bodies corresponding to the core tooth parts, respectively,
each of the core piece main bodies includes:
an arcuate portion disposed in a circular shape to be a part of the core outer circumference part forming the annular shape; and
a corresponding one of the core tooth parts located substantially in a center in the circumferential direction of the arcuate portion and projecting radially inward from the arcuate portion,

the insulator includes a plurality of insulators each provided in the core piece main bodies to cover outer circumferences of the core tooth parts of the core piece main bodies and end faces of the arcuate portions forming the end face of the core outer circumference part, and
the terminal holding portion is located on an outer side in the circumferential direction along the arcuate portion of at least one of the plurality of insulators covering the end face of the arcuate portion.

3. The stator of the motor according to claim 1 , wherein
the terminal is a power supply terminal including a power supply portion extending from the base end portion of the hook portion in the axial direction,
the terminal further includes:
a pair of the leg portions provided to locate the hook portion between the pair of the leg portions; and
a pair of the coupling portions connected to the base end portion of the hook portion from the respective pair of the leg portions, and

the pair of the coupling portions is bent in a manner in which the pair of the coupling portions inclines from the respective pair of the leg portions in a direction approaching the base end portion and extends radially outward from the respective pair of the leg portions, and thereafter becomes substantially parallel to the base end portion, to locate the hook portion radially outside the core tooth parts.

4. The stator of the motor according to claim 1 , wherein
the terminal is a power supply terminal including a power supply portion extending from the base end portion of the hook portion in the axial direction,
the terminal further includes:
a pair of the leg portions provided to locate the hook portion between the pair of the leg portions; and
a pair of the coupling portions connected to the base end portion of the hook portion from the respective pair of the leg portions, and

the pair of the coupling portions is bent in a manner in which the pair of the coupling portions extends toward the base end portion from the respective pair of the leg portions while curving radially outward, to locate the hook portion radially outside the core tooth parts.

5. The stator of the motor according to claim 1 , wherein
the terminal is a power supply terminal including a power supply portion extending from the base end portion of the hook portion in the axial direction the terminal further includes:
the single leg portion corresponding to the hook portion; and
the coupling portion connected to the base end portion of the hook portion from the leg portion, and

the coupling portion is bent in a manner in which the coupling portion inclines from the leg portion in a direction approaching the base end portion and extends radially outward from the leg portion and thereafter becomes substantially parallel to the base end portion, to locate the hook portion radially outside the core tooth parts.

6. The stator of the motor according to claim 1 , wherein
the terminal is a common terminal including the hook portions, a number of the hook portions corresponds to a number of phases of the motor,
the terminal further includes:
a pair of the leg portions provided for each of the hook portions to locate the hook portion between the pair of the leg portions;
a pair of the coupling portions connected from the pair of the leg portions to the base end portion of the hook portion corresponding to the pair of the leg portions; and further
at least one bridging portion connecting the leg portions located between the hook portions,

the bridging portion is disposed not to be located on or above the core tooth parts, and
the pair of the coupling portions is bent in a manner in which the pair of the coupling portions inclines from the respective leg portions in a direction approaching the base end portion of the hook portion corresponding to the leg portions and extends radially outward from the respective leg portions and thereafter becomes substantially parallel to the base end portion of the corresponding hook portion, to locate the hook portion radially outside the core tooth parts.

7. The stator of the motor according to claim 6 , wherein the terminal further includes a leg portion provided in the bridging portion to be located adjacent to the leg portions connected by the bridging portion.

8. An inner rotor-type motor comprising:
the stator of the motor according to claim 1 ; and
a rotor rotatably disposed radially inside the stator.

Assignees

• Minebea Mitsumi Inc

Inventors

• Kimpara Shuhei

Classifications

• H02K1/2706

  Inner rotors · CPC title

• H02K3/521 Primary

  applicable to stators only · CPC title

• H02K1/146

  consisting of a generally annular yoke with salient poles · CPC title

• H02K5/225

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

• H02K3/18

  Windings for salient poles · CPC title