Link 1 slides along fixed guides a-a and has pins b which enter holes c of inserts 4. Rotating in inserts 4 is shaft 3 which is rigidly attached to (or integral with) wedge 7 and wide-face gear 5. Round cylindrical link 2 is connected by a sliding pair to wedge 7. When gear 6 rotates about fixed axis A-A, gear 5 rotates with shaft 3 about axis B-B. The eccentricity of link 2 can be changed by shifting link 1 along guides a-a and clamping it in the required position. The eccentricity can be changed while shaft 3 is in operation.
$2393$SG,LL$