发明名称 OIL-HYDRAULIC CIRCUIT OF HYDRAULIC CYLINDER
摘要 PROBLEM TO BE SOLVED: To eliminate switching time between a high and low pressure lines and to improve a hit rate by making accumulators in two pressure circuits into a pressure sealing type. SOLUTION: The accumulators 45, 47 for high and low pressures are provided branching in a pipe line 37 on the delivery side of a variable delivery hydraulic pump 35 which provided in an oil-hydraulic circuit 27 for driving a hydraulic cylinder 17 through a solenoid switching valve 49 and a shut off valve 75 is provided on the return pipe line 61 of the solenoid switching valve 49 to a tank 29. And, pressurized oil in the accumulator 45 for high pressure or the accumulator 47 for low pressure is sealed with the shut off valve 75, so the switching time between the high and low pressure lines is eliminated and the hit rate is improved.
申请公布号 JPH09216022(A) 申请公布日期 1997.08.19
申请号 JP19960020293 申请日期 1996.02.06
申请人 AMADA CO LTD 发明人 ASAMI JUNICHI
分类号 F15B21/14;B21D28/24;B30B15/16;B30B15/22;(IPC1-7):B21D28/24 主分类号 F15B21/14
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