Patent ID: 9086101
Filing Date: 2015-07-21
Classification: B25J,F16D,F16F

Abstract:
1. A planar torsion spring, comprising: a torsion spring outer ring ( 2 ), a torsion spring inner ring ( 3 ) and a plurality of elastic bodies; wherein the elastic bodies are uniformly distributed around a circumference and connected with the torsion spring outer ring ( 2 ) and the torsion spring inner ring ( 3 ) respectively at their two ends; each elastic body is composed of two symmetrical elastic body units, each elastic body unit includes an outer circular hole slot ( 6 ), an inner circular hole slot ( 7 ) and a connecting beam ( 8 ); for each elastic body unit, the outer circular hole slot ( 6 ) and the inner circular hole slot ( 7 ) are arranged at a same side with respect to the connecting beam ( 8 ), the connecting beam ( 8 ) represents a straight-line shape and connects respectively between the torsion spring inner ring ( 3 ) and the inner circular hole slot ( 7 ), the inner circular hole slot ( 7 ) and the outer circular hole slot ( 6 ), the outer circular hole slot ( 6 ) and the torsion spring outer ring ( 2 ); a plurality of outer ring threaded holes ( 5 ) are uniformly distributed on the torsion spring outer ring ( 2 ); a plurality of inner ring unthreaded holes ( 4 ) are uniformly distributed on the torsion spring inner ring ( 3 ).