| 摘要 |
PURPOSE:To realize rationalization of the structure and share parts in a drive device for liquid pressure motors provided with two liquid pressure systems each constituted of a liquid pressure pump for driving an engine and the liquid pressure motor to be driven by the pump. CONSTITUTION:Valves 11, 12 each having an identical sleeve and spool are disposed on upstream oil passages of supply ports of a first and a second liquid pressure motor 3, 6. Accordingly, it is, made possible to realize conducting changeover between a discharge oil passage of the first pump 2 and a supply port of the first liquid pressure motor 3 or a return oil passage of the first liquid pressure motor 3 and continuity between the discharge oil passage of the second pump 5 and the supply port of the second liquid pressure motor 6 or closing changeover of the discharge oil passage of the second pump 5. Consequently, it is made possible to share constituent parts in a first and a second liquid pressure system. |
