# US 2025/0146510 A1 · Motor and axial fan

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- Number: US 2025/0146510 A1
- Document ID: US20250146510A1
- Status: Published application
- Kind: A1
- Application number: 19/014,588
- Filed: 2025-01-09
- Published: 2025-05-08
- Earliest claimed: 2021-10-19
- Assignees: Nidec Corporation
- Applicants: Nidec Corporation
- Inventors: Atsushi MICHISHITA; Yuta YAMASAKI; Hirofumi YONEDA
- Web page: https://patentgrep.com/patent/US20250146510A1

## CPC

- F04D 29/526: {Details of the casing section radially opposing blade tips (ducts F04D29/545)}
- F04D 19/002: {Axial flow fans}
- F04D 25/0613: {the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator}
- F04D 29/522: {especially adapted for elastic fluid pumps}
- F04D 29/64: of axial pumps
- F04D 29/646: {Mounting or removal of fans}
- F04D 25/0693: {Details or arrangements of the wiring}
- F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02)

## Abstract

A motor includes a rotor rotatable in a circumferential direction around a center axis extending vertically, a stator to rotate the rotor, a lead wire connected to the stator, and a housing covering the rotor and the stator from a radially outer side. The housing includes a first housing located on a first side in an axial direction, and a second housing located on a second side in the axial direction. The first housing includes a wiring convex portion protruding toward the second side in the axial direction. The second housing includes a wiring recess that is recessed toward the second side in the axial direction and penetrates in a radial direction. The wiring convex portion is located in the wiring recess. The wiring convex portion includes a tip surface opposing the second side. The wiring recess includes a bottom surface opposing the first side.

## Claims

### Claim 1

A motor comprising:
a rotor rotatable about a center axis extending vertically;
a stator to rotate the rotor; and
a housing covering the rotor and the stator from a radially outer side; wherein
the housing includes a first housing located on a first side in an axial direction, and a second housing located on a second side in the axial direction;
the housing includes a through-hole penetrating in the axial direction, the through-hole includes a first through-hole located in the first housing, and a second through-hole located in the second housing; and
at least one of the first through-hole and the second through-hole includes a small-diameter portion, and a large-diameter portion having a larger hole diameter than the small-diameter portion.

### Claim 2 (depends on 1)

The motor according to claim 1, wherein the small-diameter portion and the large-diameter portion are provided in the first through-hole, the small-diameter portion of the first through-hole is located on the first side in the axial direction, and the large-diameter portion of the first through-hole is located on the second side in the axial direction.

### Claim 3 (depends on 1)

The motor according to claim 1, wherein the small-diameter portion and the large-diameter portion are provided in the second through-hole, the small-diameter portion of the second through-hole is located on the second side in the axial direction, and the large-diameter portion of the second through-hole is located on the first side in the axial direction.

### Claim 4 (depends on 1)

The motor according to claim 1, wherein one of the first housing and the second housing includes a convex portion protruding to the radially inner side from a radially inner surface, another one of the first housing and the second housing includes a recess that is recessed in the axial direction and in which the convex portion is located, and the convex portion is provided at an outer edge portion of the through-hole.

### Claim 5 (depends on 1)

The motor according to claim 1, wherein the small-diameter portion of the through-hole is a hole into which a fastener including a screw portion is screwed, and a hole diameter of the large-diameter portion is larger than an outer diameter of the screw portion.

### Claim 6 (depends on 1)

The motor according to claim 1, wherein a length of the small-diameter portion in the axial direction is shorter than a length of the large-diameter portion in the axial direction.

### Claim 7 (depends on 1)

An axial fan including the motor according to claim 1, and a rotor blade attached to the rotor.