ROTATIONAL DRIVE DEVICE

WIPO Patent Application WO/2014/098218

A1

The purpose of the present invention is to reduce the weight and size of the tooth skipping detection structure of a speed reducer in a rotational drive device. The rotational drive device detects the occurrence of tooth skipping of the speed reducer on the basis of a difference in the outputs of encoders provided on rotation shafts on the input-side (motor-side) and output-side (load-side) with the speed reducer therebetween. The rotational drive device is provided with: a motor; a speed reducer disposed between the motor and a load for reducing the speed of rotation of the motor-side rotation shaft and transmitting the reduced speed rotation to the load-side rotation shaft; a first encoder for detecting the rotation of the motor-side rotation shaft of the speed reducer; a second encoder for detecting the rotation of the load-side rotation shaft of the speed reducer; a difference detection unit for determining the difference between a first detection value, which is obtained by dividing the output of the first encoder by the speed reduction ratio of the speed reducer, and a second detection value, which is obtained from the output of the second encoder; and a tooth skipping detection unit for detecting the occurrence of tooth skipping of the speed reducer on the basis of the difference.

URATA JUNICHI (JP)

PCT/JP2013/084247

June 26, 2014

December 20, 2013

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SCHAFT INC (JP)

F16H1/32; F16H59/46; F16H61/02; F16H61/12; G01L3/10; H02P29/00

JP2006347406A	2006-12-28
JPH11190405A	1999-07-13
JPH1058374A	1998-03-03
JP2010284931A	2010-12-24
JP2002071005A	2002-03-08
JP2011176913A	2011-09-08
JP2005328374A	2005-11-24
JPH01191368A	1989-08-01

SHIONOIRI, Akio (JP)
Akio Shionoiri (JP)

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