Motor

Patent metadata

Field	Value
Publication number	US-11637472-B2
Application number	US-201917255758-A
Country	US
Kind code	B2
Filing date	Jul 9, 2019
Priority date	Jul 11, 2018
Publication date	Apr 25, 2023
Grant date	Apr 25, 2023

Abstract

The present invention may provide a motor including a housing, a cover which covers the housing, a stator disposed inside the housing, a rotor disposed inside the stator, a rotary shaft coupled to the rotor, a bearing disposed on the cover, and a nut which is coupled to the cover and which is in contact with an outer ring of the bearing, wherein the cover incudes a first pocket accommodating the bearing and a second pocket which is disposed above the first pocket and to which the nut is rotation-coupled, the nut includes a body disposed to be lower than an upper surface of the cover and including a screw thread and an extension portion disposed to be higher than the upper surface of the cover, the body incudes a protrusion protruding outward from the screw thread, and the second pocket includes a first groove in which the protrusion is positioned.

First claim

The invention claimed is:

1. A motor comprising:
a housing;
a cover that covers the housing;
a stator disposed inside the housing;
a rotor disposed inside the stator;
a rotary shaft coupled to the rotor;
a bearing disposed on the cover; and
a nut that is coupled to the cover and that is in contact with an outer ring of the bearing,
wherein the cover incudes a first pocket accommodating the bearing and a second pocket that is disposed above the first pocket and to which the nut is rotation-coupled,
the nut includes a body disposed to be lower than an upper surface of the cover and including a screw thread and an extension portion disposed to be higher than the upper surface of the cover,
the body incudes a protrusion protruding outward from the screw thread, and
the second pocket includes a first groove in which the protrusion is positioned,
wherein the extension portion includes a second groove,
wherein the cover includes a third groove connected to the second groove, and
wherein the protrusion is disposed under a bottom surface of the third groove.

2. The motor of claim 1 , wherein:
the second groove is concavely disposed at a boundary between an upper surface of the extension portion and an outer side surface of the extension portion; and
the third groove is concavely disposed in the upper surface of the cover.

3. The motor of claim 2 , wherein a bottom surface of the second groove and a bottom surface of the third groove are disposed to be aligned at the same height.

4. The motor of claim 2 , wherein a planar shape formed by the second groove and the third groove is symmetrical with respect to a reference line passing through a center of the cover in a radial direction.

5. The motor of claim 1 , wherein the third groove is disposed above the screw thread of the body.

6. The motor of claim 2 , wherein:
a lower surface and an outer side surface of the outer ring of the bearing are in contact with an inner wall of the first pocket; and
a lower surface of the nut is in contact with an upper surface of the outer ring of the bearing.

7. The motor of claim 6 , wherein:
the second groove and the third groove are disposed as a plurality of second grooves and a plurality of third grooves, respectively; and
the plurality of the second grooves and the third grooves are disposed to be rotationally symmetrical with respect to a center of the cover.

Assignees

• Lg Innotek Co Ltd

Inventors

• Kim Jin Ho

Classifications

• H02K5/1732 Primary

  radially supporting the rotary shaft at both ends of the rotor (H02K5/1737 takes precedence) · CPC title

• F16B39/28

  by special members on, or shape of, the nut or bolt (F16B39/26 takes precedence; locknuts F16B39/12) · CPC title

• H02K7/083

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

• F16C2380/26

  Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators · CPC title

• F16C2226/60

  with threaded parts, e.g. bolt and nut connections · CPC title