FRICTION VARIABLE-SPEED DRIVE Russian patent published in 1998 - IPC

FIELD: transport engineering; load lifting and agricultural machinery; mechanical transmissions. SUBSTANCE: variable speed drive has housing, drive shafts and friction members mechanically coupled with shafts and acting in pairs. Friction members has have intersection axes of rotation and are installed for changing the angle of their intersection. One of members in each pair has spherical working surface with center in point of intersection of axes of rotation. Second member is made in form of holder with rollers which are in contact with spherical surface. Axes of rollers are located in plane passing through center of spherical surface and perpendicular to axis of holder rotation. Variable speed drive has additional member with spherical working surface for each pair of friction members. Spherical surface of additional member is concentric with spherical surface of friction member and has no axle and mechanical coupling with drive shafts and alignment supports engaging with additional member. All rollers of holder are in contact with both spherical surfaces, and their axes are arranged for radial displacement in common plane relative to holder. EFFECT: reduced wear of members in contact. 8 cl, 4 dwg