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Title:
OPERATION UNIT
Document Type and Number:
Japanese Patent JP2017082827
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an operation unit having a paradox planetary gear mechanism in which a gear is hardly broken.MEANS FOR SOLVING THE PROBLEM: An operation unit (100) for operating a valve shaft of an adjustment valve has: a sun gear (3) rotated while receiving torque by a driving motor; a fixed internal gear (5) fixed and disposed in a manner of surrounding the sun gear, and having teeth on its inner peripheral face; a plurality of planetary gears (4, 14, 24, 34) disposed between the sun gear and the fixed internal gear, engaged with the sun gear and the fixed internal gear, and rotating while revolving around the sun gear; a movable internal gear (6) disposed coaxially with the fixed internal gear, having teeth engaged with the planetary gears on its inner peripheral face, and rotatably disposed; and an output shaft connected to the movable internal gear for rotating the valve shaft of the adjustment valve. The planetary gears has a torque limiting structure for limiting power transmission when certain or more torque is applied in the rotating direction.SELECTED DRAWING: Figure 1

Inventors:
OHASHI TOMOFUMI
Application Number:
JP2015208852A
Publication Date:
May 18, 2017
Filing Date:
October 23, 2015
Export Citation:
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Assignee:
AZBIL CORP
International Classes:
F16D7/02; F16H1/28; F16K31/04; F16K31/53
Domestic Patent References:
JP2006029542A2006-02-02
JP2010266062A2010-11-25
JP2012167747A2012-09-06
JPH06137450A1994-05-17
JP2002267036A2002-09-18
JP2008202757A2008-09-04
JP2002068070A2002-03-08
Attorney, Agent or Firm:
Masaki Yamakawa
Shigeki Yamakawa