Title:
POWER TRANSMISSION DEVICE
Document Type and Number:
Japanese Patent JPS58119746
Kind Code:
A
Abstract:
PURPOSE:To enable to accurately control an operation of a power transmission device by employing as decelerating means of a servo mechanism power transmission device a frictional roller instead of a gear wheel, eliminating a backlach and providing a detector at the output shaft side of the decelerating means. CONSTITUTION:A detector 4 is mounted at one end of a motor 1, a motor rotational shaft 13 is mounted at the other end, and the shaft 13 is coupled to ths sun roller 10 of a planetary roller reduction gear. Three planetary rollers 6 are disposed around the roller 10. An elastic ring 7 is disposed outside them. The ring 7 is elastically deformed by thrust force through a shim 12, and can be set in inner diameter to an adequate size. A transmission type photodetector having an LED and a photodiode is provided at an encoder disc 14. In this manner, accurate operation control can be facilitated, thereby eliminating the noise of the gear.
Inventors:
OOTSUKI HARUAKI
Application Number:
JP31782A
Publication Date:
July 16, 1983
Filing Date:
January 06, 1982
Export Citation:
Assignee:
HITACHI LTD
International Classes:
F16H13/08; F16H35/00; H02K7/116; H02K7/20; (IPC1-7): F16H13/08; F16H35/00; H02K7/20
Attorney, Agent or Firm:
Toshiyuki Usuda