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Title:
DIRECT DRIVE ELECTRIC ACTUATOR
Document Type and Number:
WIPO Patent Application WO/2018/088244
Kind Code:
A1
Abstract:
A direct drive electric actuator 1 is provided with an electric motor portion A, a screw mechanism portion B, and an operation portion C, wherein: the electric motor portion A and the screw mechanism portion B are arranged on the same axis; the rotational motion of the hollow inner rotor 52c of the electric motor portion A is transmitted to a nut 92 of the screw mechanism portion B; and the operation portion C is provided on the screw shaft 93 of the screw mechanism portion B. The direct drive electric actuator 1 is characterized in that: the hollow inner rotor 52c and the nut 92 are arranged at positions where the hollow inner rotor 52c and the nut 92 are not overlapped with each other in the shaft direction; and a rotation stop mechanism M for the screw shaft 93 is provided inside the hollow inner rotor 52c in the radial direction.

Inventors:
MATSUTO Takushi (1578 Higashikaizuk, Iwata-shi Shizuoka 10, 〒4388510, JP)
USHIDA Kimihito (1578 Higashikaizuk, Iwata-shi Shizuoka 10, 〒4388510, JP)
KAWAI Masahiro (1578 Higashikaizuk, Iwata-shi Shizuoka 10, 〒4388510, JP)
KATO Akio (1578 Higashikaizuk, Iwata-shi Shizuoka 10, 〒4388510, JP)
Application Number:
JP2017/038863
Publication Date:
May 17, 2018
Filing Date:
October 27, 2017
Export Citation:
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Assignee:
NTN CORPORATION (3-17, Kyomachibori 1-chome Nishi-ku, Osaka-sh, Osaka 03, 〒5500003, JP)
International Classes:
H02K7/06; F16H13/08; F16H25/20; F16H25/22; F16H35/10
Domestic Patent References:
WO2014103556A12014-07-03
Foreign References:
JP2015061334A2015-03-30
JP2009095174A2009-04-30
JP2014109294A2014-06-12
JP2016031120A2016-03-07
JP2014059031A2014-04-03
JP2002362388A2002-12-18
JP2014018007A2014-01-30
Attorney, Agent or Firm:
SHIROMURA Kunihiko et al. (Ehara Patent Office, 2-15 Bakurou-machi 4-chome, Chuo-ku, Osaka-sh, Osaka 59, 〒5410059, JP)
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