Device for driving maes strength connecting a force transmission shaft with a rotatable part, in particular of the hub of the front wheel axle of a vehicle, in particular of a vehicle with selectively grade two-wheeler - or four wheel drive

摘要

An automatic hub clutch for the front wheels of a four-wheel drive vehicle which enables said wheels to automatically become engaged or disengaged from the front axle shaft when the transfer case of the vehicle is shifted to the required operating mode. The hub clutch comprises a plurality of gears the engagement of which is carried out through a control assembly that includes a control plate which forces a plurality of ball members over a cam surface for compressing a spring member to move the gear members into engagement with one another. The gear members are moved out of engagement under the action of a spring when the ball members are moved over the cam surface in the opposite direction.