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公开(公告)号:US4507057A
公开(公告)日:1985-03-26
申请号:US467961
申请日:1983-02-18
CPC分类号: E02F9/2235 , F04B49/007 , F04B49/065 , F04B2205/05 , F04B2207/042 , F04B2207/0421 , F04B2207/0422 , F15B2211/20576 , F15B2211/251 , F15B2211/265 , F15B2211/6309
摘要: A civil machine having a flow-rate controller which applies a preset signal instead of a normal flow-rate signal to a variable type hydraulic pump when delivery pressure of the hydraulic pump exceeds a preset pressure value. The normal flow-rate signal corresponds to the position of an operating lever. The preset signal has a value of minimum flow rate to hold a working tool in a certain posture. With this control system, pressure loss and temperature rise in hydraulic operating oil as well as fuel consumption of the machine can be reduced and cycle time of the work can be improved.
摘要翻译: 一种具有流量控制器的民用机器,当液压泵的输送压力超过预设压力值时,其将预置信号代替正常流量信号施加到可变型液压泵。 正常流量信号对应于操作杆的位置。 预设信号具有以一定姿态保持作业工具的最小流量的值。 利用该控制系统,可以减少液压油中的压力损失和温度上升以及机器的燃料消耗,并且可以提高工作的循环时间。
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公开(公告)号:US4377043A
公开(公告)日:1983-03-22
申请号:US221564
申请日:1980-12-31
申请人: Takayasu Inui , Kazuo Ootsuka , Saburo Nogami , Michiaki Igarashi , Toshiaki Horikoshi , Kazuhiro Izumi
发明人: Takayasu Inui , Kazuo Ootsuka , Saburo Nogami , Michiaki Igarashi , Toshiaki Horikoshi , Kazuhiro Izumi
CPC分类号: E02F3/439
摘要: A semi-automatic hydraulic excavator capable of automatically controlling arm and bucket angles when bringing the bucket back to the original excavation posture after completion of dumping excavated soil. For this purpose, arm and bucket angle detectors are provided therein and the automatic control is performed by negatively feeding back values detected by these detectors to minimize deviations between these values and preset values produced from arm and bucket angle setters corresponding to the arm and bucket angles in the original excavation posture. The automatic control mode is selected by a signal from an automatic control command signal producing circuit. With this system, the bucket is swiftly brought back to the original excavation posture from the dumping posture without requiring much operator's skill and efforts.
摘要翻译: 一种半自动液压挖掘机,能够在倾倒挖土后完成铲斗回到原始挖掘姿势时自动控制铲斗角度。 为此,在其中设置了臂和斗角检测器,并且通过对由这些检测器检测到的值进行负反馈来执行自动控制,以使这些值之间的偏差和从臂和铲斗角度对应的臂和铲斗角度设定器产生的预设值最小化 在原始挖掘姿势。 通过来自自动控制命令信号产生电路的信号来选择自动控制模式。 利用该系统,铲斗从倾倒姿态迅速恢复到原始的挖掘姿势,而不需要很多操作者的技能和努力。
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