ACTUATOR MECHANISM, RAILWAY MODEL COUPLER AND HUMANOID ROBOT MIMETIC MUSCLE DRIVE UNIT

Japanese Patent JP2016044672

A

PROBLEM TO BE SOLVED: To provide a traction actuator suitable for a railway model coupler or a humanoid robot mimetic muscle drive unit.SOLUTION: This invention comprises an arm 32 integrally arranged with a revolving shaft 10; a shape memory alloy wire 21 having one end fixed to an external supporting member, wound around the revolving shaft 10 only by an optional angle, thereafter having the other end fixed to the revolving shaft 10; and a load fixing part 30 on the arm 32. Upon shrinkage and deformation of the shape memory alloy wire 21, its shrinkage force may act as a vector in a tangential direction against the revolving shaft 10 at a contact point connecting an external wire fixing point 22 with a circumference of the revolving shaft 10, pull back the wound-around shape memory alloy wire 21, accordingly the revolving shaft 10 and the arm 32 are rotated, an entire assembly may form a lever with a point of the shape memory alloy wire 21 contacted with the revolving shaft 10 being applied as a point of effort, with a rotation center of the revolving shaft 10 being applied as a fulcrum and with a connecting point with a load arranged at the arm 32 being as a point of action. A motion of the shape memory alloy wire 21 is expanded in response to a ratio of distance between a fulcrum and a point of action and distance between a fulcrum and a point of effort.SELECTED DRAWING: Figure 1

HONMA MASARU
NISHIDA ARIGA

JP2014182711A

April 04, 2016

August 22, 2014

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TOKI CORP

F03G7/06; A63H3/04; A63H3/36; A63H19/18; A63H29/22

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