Motor and actuator

Patent metadata

Field	Value
Publication number	US-11088591-B2
Application number	US-201815918445-A
Country	US
Kind code	B2
Filing date	Mar 12, 2018
Priority date	Mar 15, 2017
Publication date	Aug 10, 2021
Grant date	Aug 10, 2021

Abstract

A motor comprising a frame and one or a plurality of magnets disposed inside the frame, wherein a gap extending in a circumferential direction is provided between an inner peripheral surface of the frame and an outer peripheral surface of the magnet, and the magnet and the frame arranged at both sides of the gap are coupled together in a rotational shaft direction by means of an adhesive.

First claim

What is claimed is:

1. An actuator comprising:
a motor; and
a housing including an accommodating part for the motor, the housing being formed with two members, wherein
the motor includes:
a frame including a plurality of corner parts and a surface part arranged between two neighboring corner parts of the frame; and
one or a plurality of magnets disposed inside the frame, wherein,
the magnet and the frame are coupled with an adhesive in a rotational shaft direction,
magnetic pole elements of the one or the plurality of magnets are disposed at the plurality of corner parts of the frame,
regions of the frame facing in a radial direction of the motor vibrate in reverse directions relative to each other during operation of the motor,
a node of the vibration of the frame is arranged at the corner part of the frame,
a belly of the vibration of the frame is arranged at the surface part of the frame,
regions of the frame adjacent to each other vibrate in reverse directions relative to each other during operation of the motor,
a reinforcing member is provided at the frame and extends in a circumferential direction along the surface part of the frame,
the reinforcing member extends in the radial direction between the frame and the accommodating part,
the reinforcing member is formed with a member different from a member of the frame,
the accommodating part includes a plurality of corner parts and a surface part arranged between two neighboring corner parts of the accommodating part,
a rib is provided at the surface part of the accommodating part, and
the rib extends in a circumferential direction with respect to the motor disposed in the accommodating part.

2. The actuator according to claim 1 , wherein
a plurality of reinforcing members are provided at the frame, the plurality of reinforcing members including the reinforcing member,
a plurality of ribs are provided at the housing, the plurality of ribs including the rib,
the reinforcing member and the rib urge the surface part of the frame toward the inside of the motor.

3. The actuator according to claim 1 , wherein an end portion of the rib is provided at one of the two neighboring corner parts of the accommodating part.

4. The actuator according to claim 1 , wherein the rib is formed with a protruding portion or is formed between a plurality of recessed portions of the housing.

5. The actuator according to claim 1 , wherein a plurality of reinforcing members are provided at the frame, the plurality of reinforcing members including the reinforcing member, a plurality of ribs are provided at the housing, the plurality of ribs including the rib, and
the plurality of the reinforcing members and the plurality of the ribs are arranged on an end portion side of the frame with respect to the center of the surface part of the frame.

6. The actuator according to claim 1 , wherein the reinforcing member is provided at the corner part and the surface part of the frame.

7. An actuator comprising:
a motor; and
a housing including an accommodating part for the motor, the housing being formed with two members, wherein
the motor includes:
a frame including a plurality of corner parts and a surface part provided between two neighboring corner parts of the frame; and
one or a plurality of magnets disposed inside the frame, wherein,
the magnet and the frame are coupled with an adhesive in a rotational shaft direction,
magnetic pole elements of the one or the plurality of magnets are disposed at the plurality of corner parts of the frame,
a reinforcing member is provided at the frame and extends in a circumferential direction along the surface part of the frame,
the reinforcing member extends in the radial direction between the frame and the accommodating part,
the reinforcing member is formed with a member different from a member of the frame,
the accommodating part includes a plurality of corner parts and a surface part provided between two neighboring corner parts of the accommodating part,
a rib is provided at the surface part of the accommodating part, and
the rib extends in a circumferential direction with respect to the motor disposed in the accommodating part.

8. The actuator according to claim 7 , wherein
a plurality of reinforcing members are provided at the frame, the plurality of reinforcing members including the reinforcing member,
a plurality of ribs are provided at the housing, the plurality of ribs including the rib,
the reinforcing member and the rib urge the surface part of the frame toward the inside of the motor.

9. The actuator according to claim 7 , wherein an end portion of the rib is provided at one of the two neighboring corner parts of the accommodating part.

10. The actuator according to claim 7 , wherein the rib is formed with a protruding portion or is formed between a plurality of recessed portions of the housing.

11. The actuator according to claim 7 , wherein
a plurality of reinforcing members are provided at the frame, the plurality of reinforcing members including the reinforcing member,
a plurality of ribs are provided at the housing, the plurality of ribs including the rib,
the plurality of the reinforcing members and the plurality of the ribs are arranged on an end portion side of the frame with respect to the center of the surface part of the frame.

12. The actuator according to claim 7 , wherein the reinforcing member is provided at the corner part and the surface part of the frame.

13. An actuator comprising:
a motor; and
a housing including an accommodating part for the motor, the housing being formed with two members, wherein
the motor includes:
a frame including a plurality of corner parts and a surface part provided between two neighboring corner parts of the frame; and
one or a plurality of magnets disposed inside the frame, wherein:
magnetic pole elements of the one or the plurality of magnets are disposed at the plurality of corner parts of the frame,
a reinforcing member is provided at the frame and extends in a circumferential direction along the surface part of the frame,
the reinforcing member extends in the radial direction between the frame and the accommodating part,
the reinforcing member is formed with a member different from a member of the frame,
the accommodating part includes a plurality of corner parts and a surface part provided between two neighboring corner parts of the accommodating part,
a rib is provided at the surface part of the accommodating part, and
the rib extends in a circumferential direction with respect to the motor disposed in the accommodating part.

14. The actuator according to claim 13 , wherein
a plurality of reinforcing members are provided at the frame, the plurality of reinforcing members including the reinforcing member,
a plurality of ribs are provided at the housing, the plurality of ribs including the rib, and
the reinforcing member and the rib urge the surface part of the frame toward the inside of the motor.

15. The actuator according to claim 13 , wherein an end portion of the rib is provided at one of the two neighboring corner parts of the accommodating part.

16. The actuator according to claim 13 , wherein the rib is formed with a protruding portion or is formed between a plurality of recessed portions of the housing.

17. The actuator according to claim 13 , wherein
a plurality of reinforcing members are provided at the frame, the plurality of reinforcing members including the reinforcing member,
a plurality of ribs are provided at the housing, the plurality of ribs includ

Assignees

• Minebea Mitsumi Inc

Inventors

• Ikuta akiko
• Ogushi Masaki

Classifications

• H02K23/40

  characterised by the arrangement of the magnet circuits · CPC title

• H02K1/17 Primary

  Stator cores with permanent magnets · CPC title

• H02K1/185

  to outer stators · CPC title

• H02K13/006

  Structural associations of commutators · CPC title

• H02K23/405

  Machines with a special form of the pole shoes · CPC title