Motion-reversing device with opposing ring bevel gears able to be alternatively coupled to the shaft through an axial manoeuvre.

摘要

The device comprises: a bevel pinion (9); two opposing ring bevel gears (18, 20) simultaneously meshing with said pinion (9) on opposite sides thereof, which are idly fitted on the same shaft (14) and, for an alternative connection of said ring gears (18, 20) with said shaft (14), two sets of radially movable pawls (24) housed in said shaft of the ring bevel gears and able to cooperate with seats (22) in the hole of the hub of said ring bevel gears (18, 20); and a member (28) for controlling said pawls (24), which member is axially movable between two opposite engagement positions passing through an idle position.