Drehbewegungsübertragung mittels Kugeln.

摘要

A rotation transmitter using balls (5) comprises a worm gear (1) having a ball circulation path, a large number of metal balls (5) inserted into the ball circulation path in a continuous row, a worm wheel (8) having a large number of ball recesses (8 min ) for accommodating balls on the periphery thereof and meshed with the worm gear (1) via the metal balls (5), collars (4) provided at the opposite ends of the worm gear (1), and ball guides (9) of semicircular sectional configuration provided to project tangentially from the collars (4) and cover the ball ports, (6) of the worm gear (1). The ball circulation path is constituted of a helical ball race (2) formed on the outer surface of the worm gear (1), ball ports (6) formed at the ends of the ball race (2) and a ball circulation passage (3) provided to extend diagonally through the interior of the worm gear (1) at a position offset toward the surface of the worm gear (1) from the axis (12) thereof so as to cause the openings at the opposite ends of the ball circulation passage (3) to connect with the ball ports (6) at an obtuse angle. The ball guides (9) and the ball circulation path cooperate to enable smooth and stable circulation of the metal balls (5) during rotation transmission, thus improving the rotation transmission efficiency.