| 摘要 |
PURPOSE:To obtain a damping force so as to restrain pitching and rolling and so as to quickly carry out the damping, and to delay the angular velocity of rolling in turning run so as to obtain the stability of running by providing variable throttle valves having a check valve for the left and the right rod sides of the front and for the left and the right rod sides of the rear in the circuit of the rod side. CONSTITUTION:A suspension lock hydraulic circuit 1 is provided with suspension lock cylinders 2-5 for the left and the right sides of the front and for the left and the right sides of the rear. In the circuit 6 of a head side, variable throttle valves 12, 13 with a check valve for the left and the right head sides of the front and variable throttle valves 14, 15 for the left and the right head sides of the rear are provided. And in the circuit 7 of a rod side, variable throttle valves 16, 17 with a check valve for the left and the right rod sides of the front and variable throttle valves 18, 19 with a check valve for the left and the right rod sides of the rear are provided. And pitching and rolling are restrained by throttling the orifice of the variable throttle valves 12-16 with a check valve to obtain a damping force in braking and running on an uneven ground, and the damping is quickly carried out, and the angular velocity of rolling is delayed in turning run. |
