Title:
ELECTRIC SEAT DRIVING DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/113234
Kind Code:
A1
Abstract:
The present invention relates to an electric seat driving device that prevents slippage between a rotor shaft and a nut shaft and enhances coupling strength therebetween by using a D-cut structure between the rotor shaft and the nut shaft, which are axially coupled to a rod, in coupling same. The electric seat driving device according to the present invention, for linearly reciprocating an electric seat along a rod, comprises: a housing having a case, of which the two ends are open and which has a circular hollow portion therein, and first and second covers detachably coupled to the two ends of the case; first and second bearings provided inside the first and second covers; a nut shaft, which has one end of the outer circumference thereof rotatably supported by the first bearing and has an inner circumferential portion thereof axially coupled to the rod; a hollow rotor shaft, which has one end thereof press-fitted to the outer circumference of the nut shaft and the other end thereof rotatably supported by the second bearing; a rotor, which has a plurality of N-pole and S-pole magnets alternately mounted on the outer circumferential portion of the rotor shaft; and a stator, which is embedded inside the case and has a coil wound around a stator core, wherein the nut shaft and the rotor shaft form a rotational shaft of the rotor, and the press-fitted portion is coupled by a D-cut structure to prevent slippage.
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Inventors:
KIM BYUNG SOO (KR)
Application Number:
PCT/KR2022/017244
Publication Date:
June 22, 2023
Filing Date:
November 04, 2022
Export Citation:
Assignee:
AMOTECH CO LTD (KR)
International Classes:
B60N2/06; B60N2/02; B60N2/07
Foreign References:
| KR102164948B1 | 2020-10-13 | |||
| CN202510680U | 2012-10-31 | |||
| KR20210114760A | 2021-09-24 | |||
| KR101991256B1 | 2019-06-21 | |||
| JP2015063212A | 2015-04-09 |
Attorney, Agent or Firm:
LEE, Jae Hwa (KR)
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