Motorised bicycle gearshift with actuation in translation of the drive shaft

摘要

A motorised bicycle gearshift that has a deformable articulated kinematic mechanism, fixed to a bicycle frame and capable of taking up different operating configurations; a chain guide, carried by the deformable articulated kinematic mechanism, capable of taking up different positions with respect to the bicycle frame according to the different operating configurations of the deformable articulated kinematic mechanism; a motor member, comprising a motor casing and a master drive shaft that projects directly from the motor casing, the motor member being mounted on the deformable articulated kinematic mechanism so as to deform it, thus making it take up the different operating configurations. The master drive shaft is immobile in rotation and mobile in translation in the axial direction, with respect to the motor casing. This gearshift provides greater precision in use, because the possible presence of dirt on the master drive shaft does not hamper the movements thereof.

主权项

1. Motorised bicycle gearshift, comprising:
a deformable articulated kinematic mechanism, intended to be fixed to a bicycle frame and able to take up different operating configurations; a chain guide, carried by the deformable articulated kinematic mechanism, capable of taking up different positions with respect to the bicycle frame according to the different operating configurations of the deformable articulated kinematic mechanism; a motor member, comprising a motor casing and a master drive shaft directly projecting from the motor casing, the motor member being mounted on the articulated kinematic mechanism so as to deform it, thus making it take up the different operating configurations; wherein the master drive shaft is immobile in rotation and mobile in translation in the axial direction, with respect to the motor casing.