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Patent Searching and Data


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 (2681 Hirosawacho 1-chom, Kiryu-shi Gunma 55, 〒3768555, JP)
INOUE Masaki (2681 Hirosawacho 1-chom, Kiryu-shi Gunma 55, 〒3768555, JP)
SUZUKI Masatoshi (2681 Hirosawacho 1-chom, Kiryu-shi Gunma 55, 〒3768555, JP)
TAJIMA Yusuke (2681 Hirosawacho 1-chom, Kiryu-shi Gunma 55, 〒3768555, JP)
SUZUKI Yuta (2681 Hirosawacho 1-chom, Kiryu-shi Gunma 55, 〒3768555, JP)
OKI Shinya (2681 Hirosawacho 1-chom, Kiryu-shi Gunma 55, 〒3768555, JP)
Application Number:
JP2013/068221
Publication Date:
January 23, 2014
Filing Date:
July 03, 2013
Export Citation:
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Assignee:
MITSUBA CORPORATION (2681, Hirosawacho 1-chome Kiryu-sh, Gunma 55, 〒3768555, JP)
International Classes:
H02K23/30; H02K7/06; H02K23/38
Domestic Patent References:
WO2007116788A12007-10-18
Foreign References:
JP2007187279A2007-07-26
JP2010110137A2010-05-13
JP2007187279A2007-07-26
JP2008517570A2008-05-22
JPH07174204A1995-07-11
JP2000253618A2000-09-14
JP2011509381A2011-03-24
JP2009501503A2009-01-15
Other References:
See also references of EP 2876791A4
Attorney, Agent or Firm:
TAKANO Yasushi (TAKANO & PARTNER, Miyamasuzaka-Toho-Estate 602 1-12-12, Shibuy, Shibuya-ku Tokyo 02, 〒1500002, JP)
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