| 摘要 |
PURPOSE: A wheel loader equipped with hydraulic pumps having different cut-off pressure is provided to enhance a rising procedure of a boom without additional electronic components and to reduce impact by reducing the rising speed of the boom when the boom reaches to the maximum height in a loading process. CONSTITUTION: A wheel loader equipped with hydraulic pumps having different cut-off pressure comprises a pair of hydraulic pumps(110a,110b), multiple working machines, and a control valve unit(130). The hydraulic pumps discharge working fluid. The working machines comprises boom cylinders(120a,120b) driven through the pressure of the working fluid. The control valve unit controls the flow of the working fluid flowing from the hydraulic pumps to the working machines through a predetermined hydraulic line, and comprises a joint circuit(134). The joint circuit joins the working fluid discharged from the pair of hydraulic pumps. |
