Patent ID: 6397698
Filing Date: 2002-06-04
Classification: F16H,Y10T

Abstract:
A controlling device for a transmission comprising:plural fork shafts each having a fork engaged with an operating mechanism for speed-changing assembled into a gear portion of a transmission; a selecting member selectively engaging with one of said plural fork shafts; a selecting actuator for moving said selecting member to selected moved positions in a selecting direction so that said selecting member engages with the fork shaft setting a predetermined speed-changing shift; a shifting actuator for shift-moving said operating mechanism by applying an acting load to said fork shaft engaged by said selecting member; locking mechanism for locking said plural fork shafts at a shifted position corresponding to a shifting operation range of said operating mechanism and a neutral position; said selecting actuator being constructed to move said selecting member to a non-engaging position not engaging with any of said plural fork shafts; said selecting actuator being constructed by a hydraulic device including an inner cylinder in which a rear end of said selecting member is contained, an outer cylinder disposed coaxially with the inner cylinder, and a cylindrical piston member disposed between the inner cylinder and the outer cylinder axially movable, said hydraulic device moving said selecting member to the selected moved-positions by controlling pressure of the inner cylinder with having moved the piston member in one end, and moving said selecting member to the non-engaging position by controlling pressure of the inner cylinder with having moved the piston member in other end.