MECHANISM FOR CONTROL OF CRANK HAVING VARYING LENGTH Russian patent published in 1998 - IPC

FIELD: any converters used for conversion of rotary motion into reciprocating motion at adjustable stroke of slide block or adjustable angle of rocker arm throw angle. SUBSTANCE: mechanism includes single-throw crankshaft with crank pin rigidly connected with it. Mounted movably on crank pin is eccentric bush with counterweight kinematically linked with crank pin by means of link gear consisting of pin and radial slot. One end of pin is pressed in hole of counterweight of eccentric bush. Radial slot is made in gear wheel movably mounted on concentric journal of single-throw crankshaft, free end of pin being placed in it. Connecting rod is freely mounted on eccentric bush. Mechanism is also provided with device for turning the eccentric bush relative to crankpin. Innovation of invention consists in position of hole for receiving the pin in counterweight which is made at angle of 90^o±10^o relative to eccentricity of eccentric bush. EFFECT: reduced overall dimensions of mechanism; reduced usage of metal. 3 dwg