| 摘要 |
PURPOSE:To maintain the speed of traveling body constant by coupling a hydraulic stepless speed changer with a car speed sensor. CONSTITUTION:A traveling body 1 having an engine 4 and a travel unit 5 is provided where a hydraulic stepless speed changer 3 is arranged in the interlocking mechanism between the engine 4 and the travel unit 5. The speed changer 3 is coupled with an operating lever and a hydraulic cylinder 8. A solenoid valve 10 for electrically switching the operating direction of cylinder is provided between a hydraulic pump 9 for operating the hydraulic cylinder 8 and the cylinder 8 where said valve 10 is controlled by a microcomputer 12 on the basis of a signal from a speed sensor 2 thus to maintain the car speed constant. |
