Title:
MOTOR PROVIDED WITH PRELOADING PORTION OF BEARING
Document Type and Number:
WIPO Patent Application WO/2023/182543
Kind Code:
A1
Abstract:
The present invention relates to a motor provided with a preloading portion of a bearing, the preloading portion being capable of reducing noise generation from the bearing that supports the rotor of the motor to be rotatable and preventing generation of defects, and according to an aspect of the present invention, the motor comprises: a rotor which forms a cylindrical accommodation space therein, and forms a hub having a magnet disposed on the inner circumference of the accommodation space; a stator which is disposed to face the accommodation space of the rotor and has a guide formed therein, the guide extending coaxially with the rotation center of the hub and having a core, on which a coil is wound, fixedly installed on the outer circumference thereof; a rotary shaft of which one end is embedded in the rotation center of the hub and the other end extends along the rotation center of the rotor to extend toward the inside of the guide; a bearing unit which comprises a ball bearing including an outer ring raceway coming into contact with the inner circumference of the guide, an inner ring raceway coming into contact with the outer circumference of the rotary shaft, and a ball located between the outer ring raceway and the inner ring raceway to be rotatable, and supports the rotary shaft to be rotatable relative to the guide; and a preloading portion pressing the bearing unit so that the contact points between the ball and the outer ring raceway and between the ball and the inner ring raceway are maintained at set positions.
Inventors:
RYU JONG SOO (KR)
LEE JUN KI (KR)
SUNG HYUN GYU (KR)
JANG JUNG HOON (KR)
LEE JUN KI (KR)
SUNG HYUN GYU (KR)
JANG JUNG HOON (KR)
Application Number:
PCT/KR2022/004046
Publication Date:
September 28, 2023
Filing Date:
March 23, 2022
Export Citation:
Assignee:
JAHWA ELECTRONICS CO LTD (KR)
International Classes:
H02K5/173; H02K1/2791; H02K5/16; H02K5/24; H02K7/08
Foreign References:
| JP2019134526A | 2019-08-08 | |||
| CN213574720U | 2021-06-29 | |||
| JP2019143516A | 2019-08-29 | |||
| JP2013148169A | 2013-08-01 | |||
| JPH11275798A | 1999-10-08 |
Attorney, Agent or Firm:
ERUUM & LEEON INTELLECTUAL PROPERTY LAW FIRM (KR)
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