Gear 1 is mounted rigidly on sleeve 6 and rotates freely with the sleeve on fixed shaft 2 about fixed axis A-A. Bevel gear 5 is rigidly attached to shaft 2 and meshes with bevel gear 3 which rotates about axis B-B of a stud on sleeve 6 and also rotates, together with sleeve 6, about axis A-A. Pin a of gear 3 enters annular internal slot b of cylinder 4 which rotates about axis A-A and slides along shaft 2 and the key on sleeve 6. Sleeve 6 is restricted axially by two stop rings. When gear 1 rotates, it drives cylinder 4 and gear 3 rolls around stationary gear 5 so that pin a oscillates cylinder 4 along shaft 2 and sleeve 6.
$2401$SG,FD$