Motor

Patent metadata

Field	Value
Publication number	US-12355310-B2
Application number	US-202217807742-A
Country	US
Kind code	B2
Filing date	Jun 20, 2022
Priority date	Jun 21, 2021
Publication date	Jul 8, 2025
Grant date	Jul 8, 2025

Abstract

A motor includes a frame, a bracket, a brush, a cover, and an electronic component. The bracket includes a first portion accommodated in the frame and a second portion protruding from the first portion toward the cover. The second portion is accommodated in the cover. The brush is disposed at the first portion of the bracket. The electronic component is disposed at the second portion of the bracket.

First claim

The invention claimed is:

1. A motor, comprising:
a frame;
a bracket;
a bearing;
a shaft supported by the bracket via the bearing;
a brush;
a cover; and
a first electronic component, wherein
the bracket comprises a first portion accommodated in the frame, a second portion protruding from the first portion toward the cover and a side wall formed continuously from the first portion to the second portion,
the second portion is accommodated in the cover,
the brush is disposed at the first portion of the bracket, and
the first electronic component is accommodated at the second portion of the bracket,
a first terminal is disposed at the second portion of the bracket,
an opening is formed in a side wall of the cover facing a side wall of the bracket, the opening being open toward the first terminal, and
the first terminal and the first electronic component are arranged side by side in the bracket in a radial direction,
a substrate attached with the first electronic component, wherein
the substrate is fixed to an end surface of the second portion in the cover side,
the side wall of the cover comprises an engaging portion, and
the side wall of the bracket comprises an engaged portion engaged with the engaging portion,
the cover is engaged with the frame.

2. The motor according to claim 1 , wherein a terminal of an external device is connected to the first terminal via the opening.

3. The motor according to claim 1 , further comprising:
a second electronic component accommodated in the first portion of the bracket; and
a second terminal disposed at the first portion of the bracket and connecting the first terminal and the second electronic component, wherein
the second terminal comprises a protruding portion protruding toward the second electronic component, and
a portion of the second electronic component at a side of the frame faces the protruding portion in an axial direction.

4. The motor according to claim 1 , wherein
an encoder is provided at an inner surface of the cover, and
the side wall of the cover comprises the opening as a first opening, and a second opening facing a terminal of the encoder.

5. The motor according to claim 1 , wherein the first electronic component reduces noise having a particular frequency.

6. The motor according to claim 1 , wherein
the engaging portion of the cover is a protrusion protruding toward the side wall of the bracket,
the engaged portion of the bracket is a recess, and
the protrusion of the cover and the recess of the bracket engage with each other.

7. The motor according to claim 6 , wherein
an outer circumferential surface of the protrusion of the cover has a recess, and a part of the frame at an opening side engages with the recess of the cover.

8. The motor according to claim 1 , further comprising:
a rotation shaft;
a commutator contacting with the brush;
an armature core; and
a coil.

9. A motor, comprising:
a frame;
a bracket;
a bearing;
a shaft supported by the bracket via the bearing;
a brush;
a cover; and
a first electronic component, wherein
the bracket comprises a first portion accommodated in the frame, a second portion protruding from the first portion toward the cover and a side wall formed continuously from the first portion to the second portion,
the second portion is accommodated in the cover,
the brush is disposed at the first portion of the bracket, and
the first electronic component is disposed at the second portion of the bracket,
an encoder is provided at an inner surface of the cover, and
the side wall of the cover comprises an opening as a first opening, and a second opening facing a terminal of the encoder,
the cover is engaged with the frame.

10. The motor according to claim 9 , wherein
an accommodating portion accommodating the first electronic component is formed at the second portion of the bracket,
a first terminal is disposed at the second portion of the bracket,
the opening is formed in a side wall of the cover facing the side wall of the bracket, the opening being open toward the first terminal, and
the first terminal and the first electronic component are arranged side by side in the bracket in a radial direction.

11. The motor according to claim 10 , wherein a terminal of an external device is connected to the first terminal via the opening.

12. The motor according to claim 10 , further comprising:
a second electronic component accommodated in the first portion of the bracket; and
a second terminal disposed at the first portion of the bracket and connecting the first terminal and the second electronic component, wherein
the second terminal comprises a protruding portion protruding toward the second electronic component, and
a portion of the second electronic component at a side of the frame faces the protruding portion in an axial direction.

13. The motor according to claim 9 , wherein
the engaging portion of the cover is a protrusion protruding toward the side wall of the bracket,
the engaged portion of the bracket is a recess, and
the protrusion of the cover and the recess of the bracket engage with each other.

14. The motor according to claim 13 , wherein
an outer circumferential surface of the protrusion of the cover has a recess, and a part of the frame at an opening side engages with the recess of the cover.

15. The motor according to claim 9 , comprising:
a rotation shaft;
a commutator contacting with the brush;
an armature core; and
a coil.

Assignees

• Minebea Mitsumi Inc

Inventors

• OHBA Hirofumi

Classifications

• H02K5/145 Primary

  Fixedly supported brushes or brush holders, e.g. leaf or leaf-mounted brushes · CPC title

• H02K11/215

  Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements · CPC title

• H02K11/026 Primary

  Suppressors associated with brushes, brush holders or their supports · CPC title

• H02K5/04

  Casings or enclosures characterised by the shape, form or construction thereof · CPC title

• H02K5/24

  specially adapted for suppression or reduction of noise or vibrations · CPC title