Lift wheel drive for use in clockwork of windup clock, has spur gears meshed with one another, and cup spring for pressing lower annular frictional engagement surface against upper annular frictional engagement surface

摘要

The drive (1) has spur gears (41, 42) meshed with one another for transferring rotation of a lift shaft on a ratchet wheel (37). A lower side crown wheel and an upper side crown wheel are provided with an upper annular frictional engagement surface (67) and a lower annular frictional engagement surface (72). The frictional engagement surfaces face each other and are provided in frictional engagement with one another. A cup spring (80) presses the lower annular frictional engagement surface against the upper annular frictional engagement surface.