O-RINGDICHTUNG FUER EINEN GETRIEBEMOTOR

摘要

An O-ring seal arrangement is between a motor unit (50) and a reduction gear head (51) of a geared motor. An O-ring holder (7h) which holds in place an O-ring (20) is defined by a flange face (7b) of a flange (7f) of a bracket (7) which is fitted into a recess (3d) of a frame (3) of the motor unit (50) and also by a guide groove (7g) which is formed on an outer face (7d) of a circular boss (7c). The flange (7f) has a thickness which is smaller by a distance (F) than the depth of the recess (3d). As a result of the distance difference (F) and the guide groove (7g), the O-ring (20) cannot slip off or become trapped when the reduction gear head (51) is coupled to the motor unit (50). <IMAGE>