DETENT DEVICE FOR A CONTROL LEVER

摘要

A detent device for a control lever comprising a cam (21) which moves integral with a control lever by operation of the control lever, a piston (26) provided on a fixed portion in the state wherein the end thereof comes into sliding contact with the cam (21) by movement of said cam (21), a pressure chamber (29) formed at the rear of said piston (26), and a spring (27) provided within said pressure chamber (29) to bias said piston (26) toward said cam (21), wherein said cam (21) is provided with a detent portion (23) in a part of the surface with which the end of said piston (26) sliding contacts, said detent portion (23) wherein the sliding resistance with the end of the piston (26) is greater than the other portions at the detent position of the control lever, further comprising detection means for detecting that the end of the piston (26) is positioned at said detent portion (23), and oil-pressure supply means for supplying oil pressure to said pressure chamber (29) on the basis of a detection signal from said detection means. The detection means comprises an electric contact constituted by a piston and a cam.