HYDRAULIQUE DRIVE DEVICE

摘要

Hydraulic pumps (3a, 3b) are connected to main lines (105, 116, 107) through a delivery line (102) and a supply line (100). Branch portions (150A, 150C, 150E) include flow control valves (15, 17, 19) for allowing a hydraulic fluid to flow from the hydraulic pumps (3a, 3b) toward hydraulic cylinders (5a, 5b, 6, 7). A hydraulic reservoir (2) is connected to main lines (115, 106, 117) through a reservoir line (103) and a drain line (101). Branch portions (151A, 151C, 151E) include flow control valves (16, 18, 20) for allowing a hydraulic fluid to flow from the hydraulic cylinders (5a, 5b, 6, 7) toward the hydraulic reservoir (2). A line (104) branched from the delivery line (102) includes a bypass valve (21) for supplying the hydraulic fluid delivered from the hydraulic pumps (3a, 3b) to the supply line (100) at a desired flow rate and returning the remaining hydraulic fluid to the hydraulic reservoir (2). <IMAGE>