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Patent Searching and Data


Title:
ROTATIONAL DRIVE DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/098218
Kind Code:
A1
Abstract:
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.

Inventors:
URATA, Junichi (AIST Tokyo Waterfront City Center 3-26, Aomi 2-chome, Koto-k, Tokyo 64, 〒1350064, JP)
Application Number:
JP2013/084247
Publication Date:
June 26, 2014
Filing Date:
December 20, 2013
Export Citation:
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Assignee:
SCHAFT INC. (AIST Tokyo Waterfront City Center, 3-26 Aomi 2-chome, Koto-k, Tokyo 64, 〒1350064, JP)
International Classes:
F16H1/32; F16H59/46; F16H61/02; F16H61/12; G01L3/10; H02P29/00
Foreign References:
JP2006347406A2006-12-28
JPH11190405A1999-07-13
JPH1058374A1998-03-03
JP2010284931A2010-12-24
JP2002071005A2002-03-08
JP2011176913A2011-09-08
JP2005328374A2005-11-24
JPH01191368A1989-08-01
Attorney, Agent or Firm:
SHIONOIRI, Akio (Fujisawa Central Bldg, 6F 1-4, Kugenuma-Tachibana 1-chome, Fujisawa-sh, Kanagawa 24, 〒2510024, JP)
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