Title:
ELECTRIC ACTUATOR
Document Type and Number:
WIPO Patent Application WO/2016/125748
Kind Code:
A1
Abstract:
Provided is an electric actuator with which the ease of maintenance is enhanced and cost reduction is achieved by simplifying the structure thereof. In an electric linear actuator provided with a ball screw mechanism 8 that converts the rotational motion of an electric motor 3 to a linear motion in the axial direction of a drive shaft 7 via a speed-reducing mechanism 6: an annular groove 21 is formed in an opening of a blind hole 9 in a first housing 2a; a sleeve 18 is positioned and secured in the axial direction by a hole stopper ring 22 that engages with the annular groove 21 and in which curved sections 22a are formed such that apexes thereof are positioned in a symmetrical manner on the left and right sides of a notched section 23 so as to face each other in the circumferential direction; a depression 24 for locking a detachable jig is formed in the hole stopper ring 22 at the inner circumference of the notched section 23; the depression 24 is provided with an arc section 24a having a radius of curvature R1 and a flat section 24b that extends from the arc section 24a in the tangential direction; and the dimension of an opening 24c is set to be less than the diameter 2R1 of the arc section 24a.
Inventors:
SHIMIZU TATSUNORI (JP)
Application Number:
PCT/JP2016/052941
Publication Date:
August 11, 2016
Filing Date:
February 01, 2016
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
International Classes:
F16H25/24; B22F3/02; F16B21/18; F16H25/20; H02K7/06; H02K7/116; C22C33/02
Foreign References:
| JP2013167334A | 2013-08-29 | |||
| JPH10508080A | 1998-08-04 | |||
| JPS6159913U | 1986-04-22 |
Other References:
See also references of EP 3255311A4
Attorney, Agent or Firm:
KOSHIKAWA, TAKAO (JP)
Takao Koshikawa (JP)
Takao Koshikawa (JP)
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