MOTOR

• US 20200136477A1
• Filed: 07/02/2018
• Published: 04/30/2020
• Est. Priority Date: 07/10/2017
• Status: Active Grant

• Current Assignee: Minebea Mitsumi, Inc.
• Original Assignee: Minebea Mitsumi, Inc.
• Inventors: AMAGI, Yuta, KANO, Tsuyoshi, MASUDA, Kumio
• Granted Patent: US 11,323,011 B2
• Time in Patent Office: Days
• CPC Class Codes: H02K 11/215 Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
• CPC Class Codes: H02K 21/16 having annular armature cores with salient poles with homopolar co-operation H02K21/20
• CPC Class Codes: H02K 2211/03 Machines characterised by circuit boards, e.g. pcb
• CPC Class Codes: H02K 29/08 using magnetic effect devices, e.g. Hall-plates, magneto-resistors H02K29/12 takes precedence

Abstract

There is provided a motor having a sensor disposable at a desired position. The motor comprises a frame (11), a rotor, a stator, a substrate (40) provided in the stator, and a sensor (53) provided at the substrate (40). The substrate (40) includes a surface facing the rotor, and an outer peripheral portion (41). In the outer peripheral portion (41) of the substrate (40), a contact portion (49) contacting an inner peripheral portion (11a) of the frame (11) is provided. In the inner peripheral portion (11a) of the frame (11), contacted portions (11j), (11k) contacting the outer peripheral portion (41) of the substrate (40) are provided. In at least one of the contact portion (49) and the contacted portion (11j), (11k), a projecting portion (49j), (49k) projecting toward another of the contact portion and the contacted portion is provided.

Claims

1. A motor comprising:

a frame;

a rotor;

a stator;

a substrate provided in the stator; and

a sensor provided at the substrate, wherein the substrate includes a surface facing the rotor, and an outer peripheral portion,

in the outer peripheral portion of the substrate, a contact portion contacting an inner peripheral portion of the frame is provided,

in the inner peripheral portion of the frame, a contacted portion contacting the outer peripheral portion of the substrate is provided, and

at least one of the contact portion and the contacted portion projects, toward another of the contact portion and the contacted portion projects, provided as a projecting portion.

2. The motor according to claim 1, wherein the projecting portion projects towards the other of the contact portion and the contacted portion, with respect to the an annular contour wherein

the one of the contact portion and the contacted portion is provided at the outer peripheral portion of the substrate or the inner peripheral portion of the frame, and

the outer peripheral portion of the substrate and the inner peripheral portion of the frame include the annular contour.

3. The motor according to claim 1, wherein the contact portion contacting the contacted portion is tensioned to a radial direction and/or a circumferential direction.

4. The motor according to claim 1, wherein the substrate is present at a position biased in the radial direction toward a part of the frame.

5. The motor according to claim 1, wherein the one of the contact portion and the contacted portion includes a plurality of projecting portions, and

the plurality of projecting portions are unevenly distributed in the circumferential direction.

6. The motor according to claim 1, wherein the stator includes a stator core and a resin member,

the resin member is present between the stator core and the substrate in a rotary shaft direction,

the outer peripheral portion of the substrate includes a recessed part recessed in the radial direction,

the resin member includes a protruding part extending in the rotary shaft direction, and

the protruding part is present inside the recessed part.

7. The motor according to claim 6, wherein the resin member is attached to the stator core, and

the protruding part is as a positioning part of the substrate.

8. The motor according to claim 6, wherein the contact portion and the recessed part are unevenly distributed in regions different from each other in the circumferential direction.

9. The motor according to claim 1, wherein the projecting portion is provided in the contact portion, and

the contacted portion is an inner peripheral surface curved along the outer peripheral portion of the substrate in the circumferential direction.

10. The motor according to claim 1, wherein the projecting portion is provided in the contacted portion, and

the projecting portion projects toward the outer peripheral portion of the substrate in the radial direction.

11. The motor according to claim 10, wherein the contact portion is a side surface of the outer peripheral portion of the substrate, the side surface being curved along the inner peripheral portion of the frame in the circumferential direction.

12. The motor according to claim 1, wherein the contact portion and the contacted portion are present at positions different from each other in the circumferential direction,

the contact portion includes a first projecting portion projecting toward the inner peripheral portion of the frame in the radial direction, and

the contacted portion includes a second projecting portion projecting toward the outer peripheral portion of the substrate in the radial direction.