Motor including a bracket board support structure for a circuit board

Patent metadata

Field	Value
Publication number	US-11196317-B2
Application number	US-201916535278-A
Country	US
Kind code	B2
Filing date	Aug 8, 2019
Priority date	Sep 28, 2018
Publication date	Dec 7, 2021
Grant date	Dec 7, 2021

Abstract

A motor includes a stationary structure, and a rotor rotatable about a central axis with respect to the stationary structure. The stationary structure includes a stator including a coil, a bracket that supports the stator, and a circuit board disposed between the stator and the bracket. The bracket includes a board support that holds the circuit board between the bracket and the stator in an axial direction. The board support includes a wiring through hole that penetrates the board support in the axial direction and through which a wire extending from the circuit board passes, a lid that partially covers the wiring through hole, and a guide bridge that is located inside the wiring through hole when viewed in the axial direction and holds the wire between the lid and the guide bridge.

First claim

What is claimed is:

1. A motor comprising:
a stationary structure; and
a rotor rotatable about a central axis with respect to the stationary structure; wherein
the stationary structure includes:
a stator including a coil;
a bracket that supports the stator; and
a circuit board disposed between the stator and the bracket;

the bracket includes a board support that holds the circuit board between the bracket and the stator in an axial direction;
the board support includes:
a wiring through hole that penetrates the board support in the axial direction and through which a wire extending from the circuit board passes;
a lid that partially covers the wiring through hole; and
a guide bridge that is located inside the wiring through hole when viewed in the axial direction and holds the wire between the lid and the guide bridge;

the wiring through hole is located next to the circuit board in a circumferential direction when viewed in the axial direction; and
the guide bridge is bridged from an end on a radially inner side of the wiring through hole to an end on a radially outer side, inside the wiring through hole.

2. The motor according to claim 1 , wherein the guide bridge includes at least one recessed groove that holds the wire, on a surface of one side in the axial direction.

3. The motor according to claim 2 , wherein
the guide bridge includes a first recessed groove that holds a first wire having a first wire diameter, and a second recessed groove that holds a second wire having a second wire diameter smaller than the first wire diameter; and
a distance in the axial direction from a bottom surface of the first recessed groove to the lid is larger than a distance in the axial direction from a bottom surface of the second recessed groove to the lid.

4. The motor according to claim 2 , wherein
the guide bridge includes a first recessed groove that holds a first wire having a first wire diameter, and a second groove that holds a second wire having a second wire diameter smaller than the first wire diameter; and
the first recessed groove is located at a radially inner side from the second recessed groove.

5. The motor according to claim 1 , wherein
the lid includes a recess that is recessed toward one side in the axial direction or a lid through hole that penetrates the lid in the axial direction, in a region facing the guide bridge in the axial direction; and
an edge of the recess or the lid through hole presses the wire from one side in the axial direction.

6. The motor according to claim 5 , further comprising a seal that closes the lid through hole.

7. The motor according to claim 1 , wherein a connecting portion between the wire and the circuit board is a solder joint portion.

Assignees

• Nidec Corp

Inventors

• Takemoto Shinji
• Fukami Kenji

Classifications

• H02K5/08 Primary

  Insulating casings · CPC title

• H02K29/00

  Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices · CPC title

• H02K5/225 Primary

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

• H02K2211/03

  Machines characterised by circuit boards, e.g. pcb · CPC title

• H02P6/085

  in a bridge configuration · CPC title