| 摘要 |
PURPOSE:To prevent malfunction and to achieve smooth operation by an arrangement wherein a traveling motor is actuated upon elapse of predetermined time after actuation of an auxiliary motor constituting a hydraulic source based on the function of a delay means at the starting time of vehicle. CONSTITUTION:A hydraulic source g, 25 comprising an auxiliary motor e, 23 and a hydraulic pump f, 24 for operating a hydraulic change-over valve c, 15 is provided. A delay means h, 42 is disposed between the hydraulic source g, 25 and a traveling motor a, 21 in order to actuate the traveling motor, a, 21 upon elapse of predetermined time after driving of the auxiliary motor e, 23 constituting the hydraulic source g, 25 when a vehicle is started. Consequently, immediately upon driving of the traveling motor a, 21, driving force thereof is transmitted through an automatic speed change gear b, 2 to a driven body d. According to the arrangement, pressure oil supply from a hydraulic oil change-over valve c, 15 is prevented from lagging due to the rising time of the hydraulic pump f, 24 when a vehicle is started, resulting in a smooth operation. |
