Device for braking a vehicle wheel

A device for braking a vehicle wheel whose hub is rotatably mounted on a stub axle of a rear axle of the vehicle and which is rotated through a drive shaft emerging at the free end of the stub axle, and on which is fixed the sun wheel of an epicyclic train reducer whose planet wheels, engaged with a ring gear integral with a ring gear carrier fixed on the stub axle, are mounted on shafts carried by the bottom of a casing integral with the hub and enclosing the reducer, this device being fixed on the outer face of the bottom of the casing and comprising a watertight case enclosing at least one friction disc interlocked in rotation with the drive shaft, as well as an annular plate axially movable under the action of control means for applying it against the disc, characterized in that the control means comprise push-rods housed in the shafts carrying the planet wheels, these rods bearing on the annular plate with one of their ends and being connected at their other end by a ring disposed inside the ring gear carrier, a non-rotatable counter-plate adapted to be applied against the ring for pushing it, against resilient return members, towards the friction disc, rocking levers for moving the counter-plate and means for actuating the rocking levers.