Title:
LINEAR ACTUATOR
Document Type and Number:
WIPO Patent Application WO/2014/013870
Kind Code:
A1
Abstract:
[Problem] To reduce the size of a linear actuator motor without increasing the operation noise thereof, and to thereby achieve a quieter, more compact linear actuator. [Solution] A linear actuator (1) comprises: a shaft (26) that is rotated in the forward and reverse directions by a motor (34) via a double start worm (36) and a worm wheel (41); a screw nut (29) that is screwed to the shaft (26); and a piston tube (10) that is fixed to the screw nut (29) and that advances or retreats in accordance with the rotation of the shaft (26). The motor (34) comprises: a 4-pole magnet (85); an armature (81) having a plurality of layers of an armature coil (91) wound thereon; a commutator (86); brushes (93a, 93b) that are disposed above and below at positions offset by approximately 90°; and an equalizing line (94) for connecting coils from among the armature coils (91) that require potential equalization.
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Inventors:
NAKAMURA MASATO (JP)
INOUE MASAKI (JP)
SUZUKI MASATOSHI (JP)
TAJIMA YUSUKE (JP)
SUZUKI YUTA (JP)
OKI SHINYA (JP)
INOUE MASAKI (JP)
SUZUKI MASATOSHI (JP)
TAJIMA YUSUKE (JP)
SUZUKI YUTA (JP)
OKI SHINYA (JP)
Application Number:
PCT/JP2013/068221
Publication Date:
January 23, 2014
Filing Date:
July 03, 2013
Export Citation:
Assignee:
MITSUBA CORP (JP)
International Classes:
H02K23/30; H02K7/06; H02K23/38
Domestic Patent References:
| WO2007116788A1 | 2007-10-18 |
Foreign References:
| JP2007187279A | 2007-07-26 | |||
| JP2010110137A | 2010-05-13 | |||
| JP2007187279A | 2007-07-26 | |||
| JP2008517570A | 2008-05-22 | |||
| JPH07174204A | 1995-07-11 | |||
| JP2000253618A | 2000-09-14 | |||
| JP2011509381A | 2011-03-24 | |||
| JP2009501503A | 2009-01-15 |
Other References:
See also references of EP 2876791A4
Attorney, Agent or Firm:
TAKANO YASUSHI (JP)
Yasushi Takano (JP)
Yasushi Takano (JP)
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