Converting reciprocating motion into rotary motion

摘要

A mechanism for converting reciprocating motion into rotary motion comprises a pivot pin 5 coupled for displacement with a reciprocating member, e.g. the piston 6 of an I.C. engine, and a planet wheel 2 fast with the pivot pin and journalled eccentrically with a rotary member, the planet wheel 2 meshing with a non-rotatable ring gear 4 with a gear ratio of 1:2 therewith. The axis of the planet wheel 2 is offset from the axis of the pivot pin 5 by a distance equal to the radius of the rolling circle of the planet wheel 2. Counterweights 8 are provided for balancing purposes. The mechanism may be applied to an I.C. engine with offset pistons (see Fig. 5).