Patent ID: 6315691
Filing Date: 2001-11-13
Classification: B60K,F16D,F16H

Abstract:
A toothed selector clutch in a power shift transmission having an apparatus for a stepless transmission ratio variation, the transmission including downstream gearwheel stages with at least one associated toothed selector clutch thereby providing a plurality of gears, the toothed selector clutch including a coaxial double differential clutch comprising:a clutch carrier mounted on a rotatable shaft;a shift bridge operatively connected to the clutch carrier by radial toothing thereby providing for the transmission of torque between the clutch carrier and the shift bridge and for the axial displacement of the shift bridge, the shift bridge being subjected to a pressure medium on axially opposite ends and wherein the shift bridge includes shift toothing on each of the axially opposite ends;a pair of separately controllable pressure spaces internal to the shift bridge for applying pressure to the opposite ends of the shift bridge, each of the pressure spaces being capable of being subjected to pressure simultaneously to place the shift bridge in a neutral, central position; andwherein each of the pressure spaces is capable of being depressurized individually so that the shift toothing at the end of the shift bridge adjacent the pressurized pressure space engages an adjacent gear at a synchronous speed without transferring load from the shaft to the gear being engaged and without interruption to the transmission of torque from the shaft to an engaged gear designated to be disengaged.