| 摘要 |
PURPOSE:To store the energy which is lost during braking and make use of the energy when needed. CONSTITUTION:A structure for accumulating pressure has a reservoir tank 1 for storing operating oil, a hydraulic pump 2 for discharging the operating oil, a hydraulic motor 3 driven by discharge hydraulic pressure, a first cutoff valve 4 located between the hydraulic motor 3 and the reservoir tank 1, an accumulator 5 located downstream of the hydraulic motor 3 and upstream of the hydraulic pump 2, a second cutoff valve 6 located between the accumulator 5 and the hydraulic pump 2, and a directional control valve 7 located downstream of the hydraulic pump 2 and upstream of the hydraulic motor 3. The hydraulic motor 3 serves also as a hydraulic pump, and the first cutoff valve 4 prevents the operating oil from the hydraulic motor 3 from flowing into the reservoir tank 1 when a predetermined signal is input thereto, and the second cutoff valve 6 allows supply of the hydraulic pressure from the accumulator 5 into the hydraulic pump 2 when a predetermined signal is input thereto, and the directional control valve 7 supplies the operating oil from the reservoir tank 1 into the hydraulic motor 3 when a predetermined signal is input thereto. |
