IP Library › Granted Patent US 10,396,623
Granted Patent B2
US 10,396,623 · App. 16/169,734 · Granted Aug 27, 2019

Motor shaft, motor and motor assembly

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Quick Facts
Patent No.
US 10,396,623
App. No.
16/169,734
Granted
Aug 27, 2019
Kind
B2
Abstract

A motor includes: a motor shaft including a press-fitting surface; and a first annular projection group and a second annular projection group formed in the press-fitting surface of the motor shaft. The first annular projection group and the second annular projection group are separated from each other in an axial direction, a distance between an adjacent two of annular projections in the first annular projection group and a distance between an adjacent two of annular projections in the second annular projection group are smaller than a distance between the first annular projection group and the second annular projection group in the axial direction.

Claims (24)

1. A motor comprising:

a motor shaft including a press-fitting surface; and

a first annular projection group and a second annular projection group formed in the press-fitting surface of the motor shaft,

wherein the first annular projection group and the second annular projection group are separated from each other in an axial direction, a distance between an adjacent two of annular projections in the first annular projection group and a distance between an adjacent two of annular projections in the second annular projection group are smaller than a distance between the first annular projection group and the second annular projection group in the axial direction.

2. The motor according to claim 1 ,

wherein the first annular projection group includes the two annular projections.

3. The motor according to claim 2 ,

wherein the second annular projection group includes the two annular projections.

4. The motor according to claim 1 ,

wherein an outer diameter of the first annular projection group and an outer diameter of the second annular projection group are greater than an outer diameter of the shaft between the first annular projection group and the second annular projection group.

5. The motor according to claim 1 , wherein the outer diameter of the second annular projection group is greater than the outer diameter of the first annular projection group.

6. The motor according to claim 1 ,

wherein the second annular projection group is formed in rear end side with respect to the first annular projection group in the axial direction.

7. The motor according to claim 1 , further comprising

a magnet fixed to the motor shaft, and

a coil.

8. The motor according to claim 1 ,

wherein the first annular projection group is formed on the side of a front end in the a press-fitting surface of the motor shaft, and

the second annular projection group is formed on the side of a rear end in the a press-fitting surface of the motor shaft.

9. A motor assembly comprising:

a motor shaft including a press-fitting surface; and

a first annular projection group and a second annular projection group formed in the press-fitting surface of the motor shaft,

wherein the first annular projection group and the second annular projection group are separated from each other in an axial direction,

a distance between an adjacent two of annular projections in the first annular projection group and a distance between an adjacent two of annular projections in the second annular projection group are smaller than a distance between the first annular projection group and the second annular projection group in the axial direction.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 5, 2020
From: MINEBEA CO., LTD.
To: MINEBEA MITSUMI INC.
Reel/Frame 051803/0293 →