Motor with thrust bearing

Patent metadata

Field	Value
Publication number	US-9768651-B2
Application number	US-201414530870-A
Country	US
Kind code	B2
Filing date	Nov 3, 2014
Priority date	Dec 31, 2013
Publication date	Sep 19, 2017
Grant date	Sep 19, 2017

Abstract

A motor includes a base, a bearing sleeve, a stator, a rotating member, a thrust bearing, and a hub. The bearing sleeve is arranged with the base and has an opening end and a sealing end opposite to each other. The stator connects with the base or the bearing sleeve. The rotating member is arranged inside the bearing sleeve and includes a shaft and a limiting portion adjacent to the sealing end. A first end of the shaft connects with the limiting portion, and a second end of the shaft has a coupling portion adjacent to the opening end. The thrust bearing is arranged between the shaft and an inner surface of the bearing sleeve, so that the limiting portion is between the thrust bearing and the sealing end. The hub connects with the coupling portion of the shaft and has a permanent magnet corresponding to the stator.

First claim

What is claimed is:

1. A motor with thrust bearing, comprising:
a base;
a bearing sleeve arranged with the base and having an opening end and a sealing end, with the opening and sealing ends opposite to each other;
a stator connecting with the base or the bearing sleeve;
a rotating member arranged inside the bearing sleeve and comprising a shaft and a limiting portion, wherein a first end of the shaft connects with the limiting portion, a second end of the shaft has a coupling portion, and the coupling portion is close to the opening end and away from the sealing end as well as the limiting portion is close to the sealing end and away from the opening end;
a thrust bearing arranged between the shaft and an inner surface of the bearing sleeve, wherein the limiting portion is between the thrust bearing and the sealing end; and
a hub connecting with the coupling portion of the shaft and having a permanent magnet corresponding to the stator.

2. The motor with thrust bearing as claimed in claim 1 , wherein the base has a connecting portion, a plate and a tube, the connecting portion connects with the bearing sleeve, the tube connects to a center part of the plate and has an axial hole extending through the tube axially, the connecting portion is in a form of a through-hole, and the stator connects to an outer periphery of the tube.

3. The motor with thrust bearing as claimed in claim 2 , wherein an inner surface of the tube has a radial recess, and the hub has an annular flange extending into the tube, corresponding to the radial recess, and located between the radial recess and the outer periphery of the bearing sleeve.

4. The motor with thrust bearing as claimed in claim 3 , wherein the annular flange is integrally formed on a surface of the hub, with the surface facing the bearing sleeve.

5. The motor with thrust bearing as claimed in claim 3 , wherein the hub has a plurality of engaging holes, and the hub integrally forms the annular flange via the engaging holes.

6. The motor with thrust bearing as claimed in claim 2 , wherein an end surface of the tube adjacent to the opening end has an annular groove, and the hub has an annular flange extending into the annular groove.

7. The motor with thrust bearing as claimed in claim 6 , wherein the annular flange is integrally formed on a surface of the hub, with the surface facing the bearing sleeve.

8. The motor with thrust bearing as claimed in claim 6 , wherein the hub has a plurality of engaging holes, and the annular flange engages with the engaging holes.

9. The motor with thrust bearing as claimed in claim 1 , wherein the shaft has a maximum outer diameter, the limiting portion has another maximum outer diameter, and the maximum outer diameter of the limiting portion is larger than the maximum outer diameter of the shaft.

10. The motor with thrust bearing as claimed in claim 1 , wherein a surface of the sealing end inside the bearing sleeve has a plurality of supports, and the limiting portion of the rotating member abuts against the plurality of supports.

11. The motor with thrust bearing as claimed in claim 1 , wherein a surface of the sealing end inside the bearing sleeve has a plurality of supports, and the thrust bearing has one end abutting against the plurality of supports.

12. The motor with thrust bearing as claimed in claim 1 , wherein the base comprises a plate, the bearing sleeve is a shaft tube, the shaft tube integrally connects with the plate, and the stator couples with an outer surface of the shaft tube.

13. The motor with thrust bearing as claimed in claim 12 , wherein an inner sleeve is arranged inside the shaft tube, and the inner sleeve has a radial protrusion between the thrust bearing and the sealing end.

14. The motor with thrust bearing as claimed in claim 13 , wherein the inner sleeve is integrally formed with the shaft tube.

15. The motor with thrust bearing as claimed in claim 13 , wherein a gap is formed between the limiting portion and the thrust bearing.

16. The motor with thrust bearing as claimed in claim 1 , wherein the base and the bearing sleeve are integrally formed with each other as a single piece.

Assignees

• Sunonwealth Electric Machine Ind Co Ltd

Inventors

• Horng Alex
• Wang Ko-Chien

Classifications

• F16C2370/12

  Hard disk drives or the like · CPC title

• F16C17/107

  with at least one surface for radial load and at least one surface for axial load · CPC title

• F16C43/02

  Assembling sliding-contact bearings · CPC title

• G11B19/2009

  Turntables, hubs and motors for disk drives; Mounting of motors in the drive (means for clamping of disk to turntable G11B17/022 and subgroups) · CPC title

• H02K7/085

  radially supporting the rotary shaft at only one end of the rotor (H02K7/086, H02K7/09 take precedence) · CPC title