Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
LINEAR MOTION AND ROTATION DETECTOR, LINEAR MOTION AND ROTATION DETECTOR UNIT, AND LINEAR MOTION AND ROTATION DRIVE DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/209271
Kind Code:
A1
Abstract:
The objective of the present invention is to provide a linear motion and rotation detector with which a deterioration in the accuracy of detection of the rotational position of a moving body can be suppressed even if a rotary scale coaxial with the moving body is inclined as a result of inclination of the moving body. A linear motion and rotation detector 17 which detects displacement of an output shaft 2 includes: a linear position detecting portion 20 provided with a linear scale 76 including a linear position detection magnetized pattern 79 on a circumferential wall 76a facing in the radial direction, and a first magnetic detecting element 91 which faces the linear position detection magnetized pattern 79 from the radial direction and detects magnetic field variations; and a rotational position detecting portion 19 provided with a rotary scale 55 including a rotary position detection magnetized pattern 57 on a flat surface 55a facing in an axial direction X, and a rotational position detection magneto-resistive element 86 which faces the rotary position detection magnetized pattern 57 from the axial direction X and detects magnetic field variations. The linear scale 76 moves in the axial direction X together with the output shaft 2, and the rotary scale 55 rotates coaxially with the output shaft 2 at a predetermined position in the axial direction X.

Inventors:
MORIYAMA,Katsuya (5329 Shimosuwa-machi, Suwa-gu, Nagano 11, 〒3938511, JP)
ARUGA,Fusayoshi (5329 Shimosuwa-machi, Suwa-gu, Nagano 11, 〒3938511, JP)
Application Number:
JP2017/020568
Publication Date:
December 07, 2017
Filing Date:
June 02, 2017
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
NIDEC CORPORATION (338 Kuzetonoshiro-cho, Minami-ku Kyoto-sh, Kyoto 05, 〒6018205, JP)
International Classes:
G01D5/245; G01B7/00; G01B7/30
Download PDF: