Title:
LINEAR ACTUATOR
Document Type and Number:
WIPO Patent Application WO/2018/174039
Kind Code:
A1
Abstract:
In order to prevent the rotation of an output shaft and increase the precision with which the output shaft can move, this linear actuator (100), which has a structure for converting the rotation of a rotor to linear motion of an output shaft, is equipped with: a front housing (150); a tubular rotor (130) held thereon in a rotatable manner, and having on the inside an internal thread (133); a shaft (140) the outer circumference of which is provided with an external thread structure for meshing with the internal thread (133); and a rotation prevention member (143) that is housed in a columnar space (153) provided on the front housing (150) and extending in the axial direction, and that does not rotate with respect to the front housing (150), is able to slide in the axial direction inside the columnar space (153), and is secured to the shaft (140). A contact surface (154a) with which an axial end surface (143b) of the rotation prevention member (143) can make contact is provided in the front housing (150), and when the shaft (140) protrudes as far as possible the end surface (143b) makes surface contact with the contact surface (154a).
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Inventors:
INAGAKI MASAAKI (JP)
Application Number:
PCT/JP2018/010929
Publication Date:
September 27, 2018
Filing Date:
March 20, 2018
Export Citation:
Assignee:
MINEBEA MITSUMI INC (JP)
International Classes:
F16H25/20; H02K7/06
Foreign References:
| US7408277B2 | 2008-08-05 | |||
| JPH10322963A | 1998-12-04 | |||
| JPH11155275A | 1999-06-08 |
Attorney, Agent or Firm:
EINSEL Felix-Reinhard et al. (JP)
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