Leveling Motor

• US 20120153756A1
• Filed: 12/20/2011
• Published: 06/21/2012
• Est. Priority Date: 12/21/2010
• Status: Active Grant

• Current Assignee: LG Innotek Company Limited (LG Corporation)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: Lee, Suhyoung
• Granted Patent: US 9,172,286 B2
• Time in Patent Office: Days
• US Class Current: 310/83
• CPC Class Codes: H02K 7/06 Means for converting reciprocating motion into rotary motion or vice versa

Abstract

Disclosed is a leveling motor, which removes a gap from a threaded portion converting a rotating force of the leveling motor into an axial feeding force to minimize a movement error and enable a leveling operation to be precisely controlled, and includes a housing, a shaft axially moving in the housing and having on an outer circumference thereof a threaded portion, a threaded pipe provided on an outer circumference of the shaft and having on an inner circumference thereof a grooved portion that corresponds to the threaded portion, and an elastic member supplying an upward elastic force to the shaft, whereby the threaded portion axially comes into close contact with the grooved portion by the elastic force of the elastic member.

Claims

1. A leveling motor, comprising:

a housing;

a shaft axially moving in the housing and having on an outer circumference thereof a threaded portion;

a threaded pipe provided on an outer circumference of the shaft, and having on an inner circumference thereof a grooved portion that corresponds to the threaded portion; and

an elastic member supplying an upward elastic force to the shaft,

whereby the threaded portion axially comes into close contact with the grooved portion by the elastic force of the elastic member.

2. The leveling motor as set forth in claim 1, wherein the elastic member comprises a coil spring, connected at an upper end thereof to a lower end of the shaft and connected at a lower end thereof to a bottom of the housing.

3. The leveling motor as set forth in claim 1, wherein an outer circumference of the elastic member is supported by a lower end of the inner circumference of the threaded pipe to limit a horizontal movement of the elastic member.

4. The leveling motor as set forth in claim 2, wherein an outer circumference of the elastic member is supported by a lower end of the inner circumference of the threaded pipe to limit a horizontal movement of the elastic member.

5. The leveling motor as set forth in claim 3, further comprising:

a protrusion protruding upwards from the bottom of the housing to limit the horizontal movement of the elastic member.

6. The leveling motor as set forth in claim 4, further comprising:

a protrusion protruding upwards from the bottom of the housing to limit the horizontal movement of the elastic member.

7. The leveling motor as set forth in claim 1, further comprising:

a spherical connector interposed between the shaft and the elastic member.

8. The leveling motor as set forth in claim 7, further comprising:

a contact member interposed between the connector and the elastic member to support a bottom of the connector.

9. The leveling motor as set forth in claim 8, wherein the contact member takes a disc shape.

10. A leveling motor, comprising:

a shaft having on an outer circumference thereof threads;

a threaded pipe provided on the outer circumference of the shaft, transmitting rotating force, through grooves formed on an inner circumference of the threaded pipe, to the threads, thus moving the shaft axially; and

an elastic member disposed under a lower end of the shaft and supplying an upward elastic force so that crests of the threads come into close contact with the grooves.