| 摘要 |
PROBLEM TO BE SOLVED: To provide a device for carrying out the positioning of a tranion shaft in a hydraulic transmission surely. SOLUTION: A hydraulic transmission(HST) 10 for changing a running speed steplessly, a control lever 2 for turning the tranion shaft 11 for shift operation of HST10 in response to a swing angle, an interlocking device for transmitting the swing of the control lever 2 to the tranion shaft 11, a hydraulic cylinder 8 for turning the tranion shaft 11, a solenoid valve 9 for operating the hydraulic cylinder 8 and a microcomputer control device 6 for controlling the solenoid valve 9 are installed on the working vehicle like a tractor. The micro-computer control device 6 is formed by connecting with a swing sensor 4 for detecting the swing amount of the control lever 2, a stroke sensor 16 for detecting the operation amount or operation position of the hydraulic cylinder 8 and a sensitivity adjust volume 17 for adjusting the sensitivity of a swing sensor 4. |
