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1. (WO2014196397) ACTUATOR

Pub. No.:    WO/2014/196397    International Application No.:    PCT/JP2014/063820
Publication Date: Fri Dec 12 00:59:59 CET 2014 International Filing Date: Tue May 27 01:59:59 CEST 2014
IPC: F16H 25/24
F16C 29/04
F16C 29/08
F16H 25/20
F16H 25/22
Applicants: THK CO., LTD.
Inventors: YAMAKURA Wataru
山倉 亙
KONO Takaya
河野 貴哉
秋吉 充
Provided is an actuator in which the side surface covers can be easily attached and detached without damaging the upper surface cover, and for which, because the actuator, with the side surface covers removed, is tightened and fixed to a base from above, usability is improved and cost can be controlled since increasing actuator size is not necessary. The actuator comprises: a long screw shaft on the outside of which a helical first roller rolling groove is formed; an inner block in which a screw hole through which the screw shaft passes is formed and on the outside of which second roller rolling grooves parallel to the screw shaft are formed; an outer rail facing the second roller rolling grooves; and multiple rollers disposed between the screw shaft and the inner block and between the inner block and the outer rail, respectively. The actuator is provided with: side surface covers that extend between a pair of end members set at the two ends of the screw shaft; and an upper surface cover disposed so as to close an opening that is formed between the side surface covers, the opening being parallel with the screw shaft. The side surface covers are provided with an upper plate formed to be parallel with the upper surface cover and a side plate that hangs down from one edge of the upper plate. The end members comprise position-holding means, which contact the corner between the upper plate and the side plate.