Patent ID: 6497160
Filing Date: 2002-12-24
Classification: F16H,Y10T

Abstract:
A control device for a semiautomatic gearshift mechanism of a vehicle, said control device comprising:a first actuator configured to move a gearshift shaft for gutter selection in a first shaft movement direction; a second actuator configured to move the gearshift shaft for gear selection in a second shaft movement direction; wherein said first actuator comprises a primary piston (36) and at least two auxiliary pistons (42-45) configured to move said primary piston (36) alternatingly in two travel directions; wherein said primary piston (36) has a piston body (37) having first and second piston body end faces facing away from one another; wherein said primary piston (36) comprises first and second piston rods (38, 39), wherein said first piston rod (38) is connected to said first piston body end face and said second piston rod (39) is connected to said second piston body end face, wherein said first and second piston rods (38, 39) project away form said first and second piston body end faces and extend in said travel directions; and wherein said first piston rod (38) has a first piston rod end face (86), said second piston rod (39) has a second piston rod end face (87), each of said auxiliary pistons (42-45) has a piston end face (82-85), wherein said first and second piston rod end face (86, 87) and said piston end faces (82-85) are configured to be loaded by a pressure medium, and wherein said first and second piston rod end faces (86, 87) have a size that differs from a size of said piston end faces (82-85).