ROTATION DETECTING DEVICE AND HOLLOW ACTUATOR

Title:

ROTATION DETECTING DEVICE AND HOLLOW ACTUATOR

Document Type and Number:

WIPO Patent Application WO/2017/212654

Kind Code:

A1

Abstract:

A hollow type rotation detecting device (3) includes a dipole magnet ring (15) and a multipolar gear (16) secured coaxially on the outer circumferential surface of a spindle end portion (6) of a hollow motor spindle which extends coaxially inside a cylindrical cover (13). Rigid boards (21 to 25) are arranged with an attitude facing in a tangential direction at predetermined intervals in the circumferential direction in an annular gap (20) between the dipole magnet ring (15) and the multipolar gear (16), and the cylindrical cover (13). The rigid boards are electrically connected to one another by means of flexible printed circuit boards (26, 27, 28 ...). The present invention makes it possible to obtain a rotation detecting device suitable to be incorporated into the narrow annular gap (20) between a motor house (4) and the spindle end portion (6) of the hollow motor spindle in a hollow motor (1) having a large hollow diameter.

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Inventors:

UENO SHINTARO (JP)
YAMAGUCHI RYUTARO (JP)
KOBAYASHI KIYOTO (JP)
TAKEWAKA KEISUKE (JP)

Application Number:

PCT/JP2016/067449

Publication Date:

December 14, 2017

Filing Date:

June 10, 2016

Export Citation:

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Assignee:

HARMONIC DRIVE SYSTEMS (JP)

International Classes:

G01D5/245; H02K11/215

Domestic Patent References:

WO2011061794A1

2011-05-26

Foreign References:

JP2014062770A	2014-04-10
JPH0333982U	1991-04-03

Other References: