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公开(公告)号：US09650232B2
公开(公告)日：2017-05-16
申请号：US14077508
申请日：2013-11-12
发明人： Naoki Sugano , Naoto Hori , Takaharu Michida
IPC分类号： F15B15/02 , B66D1/44 , F15B11/024
CPC分类号： B66D1/44 , F15B11/024 , F15B2011/0243 , F15B2211/3053 , F15B2211/3058 , F15B2211/329 , F15B2211/351 , F15B2211/40569 , F15B2211/415 , F15B2211/428 , F15B2211/46 , F15B2211/7058 , F15B2211/761
摘要： Provided is a hydraulic drive apparatus for working machine capable of preventing an excessive pressure reduction on a meter-in side and moving a load in a lowering direction at a stable speed requiring no counter balance valve. The apparatus includes a hydraulic pump, a hydraulic actuator for lowering the load, an operating device, a hydraulic circuit including a meter-in flow passage, a meter-out flow passage and a regeneration flow passage, a control valve, a meter-in-flow-rate controller for controlling a meter-in flow rate, a meter-out-flow-rate controller for controlling a meter-out flow rate to one not lower than the meter-in flow rate, a back pressure generator located downstream of the regeneration flow passage in the meter-out flow passage, and a meter-out-flow-rate limiter. The meter-out-flow-rate limiter minimizes a flow passage area of the meter-out orifice when a pressure in the meter-in flow passage falls to or below a permissible pressure.
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公开(公告)号：US09316236B2
公开(公告)日：2016-04-19
申请号：US13713680
申请日：2012-12-13
发明人： Hiroo Kondo , Takaharu Michida , Katsuki Yamagata , Naoto Hori , Naoya Kitazumi , Satoshi Maekawa , Naoki Sugano
IPC分类号： F15B11/04 , F15B9/08 , F15B11/044 , F15B21/04
CPC分类号： F15B9/08 , F15B11/044 , F15B21/047 , F15B2211/3116 , F15B2211/3157 , F15B2211/329 , F15B2211/353 , F15B2211/46 , F15B2211/7058 , F15B2211/75 , F15B2211/761 , F15B2211/8609
摘要： Provided is a hydraulic driving apparatus for a working machine, preventing an excessive decrease in pressure on a meter-in side and moving a load at a stable speed in a lowering direction. The apparatus comprises: a hydraulic pump; a hydraulic actuator; a manipulation device; a working hydraulic circuit including a meter-in flow passage and a meter-out flow passage; a control valve for changing a state of supply of hydraulic fluid to drive the hydraulic actuator at a speed designated by the manipulation device; a meter-in flow adjuster and a meter-out flow adjuster adapted to adjust a meter-in flow rate and meter-in flow rate respectively to respective value corresponding to the speed designated by the manipulation device; and a relief valve. The meter-in and meter-out flow adjusters have respective flow adjustment characteristics such that the meter-in flow rate is greater than the meter-out flow rate.
摘要翻译： 本发明提供一种用于工作机械的液压驱动装置，防止了进入侧的压力的过度降低，并且在下降方向上以稳定的速度移动负载。 该装置包括：液压泵; 液压执行器; 操纵装置; 工作液压回路，包括流入通道和流出通道; 控制阀，用于改变液压流体的供给状态，以由操纵装置指定的速度驱动液压致动器; 一个流入式流量调节器和一个流出量调节器，适用于分别将流量和流量流量调整到对应于由操纵装置指定的速度的相应值; 和安全阀。 输入和输出流量调节器具有相应的流量调节特性，使得流入流量大于流出流量。
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公开(公告)号：US09528531B2
公开(公告)日：2016-12-27
申请号：US14077532
申请日：2013-11-12
发明人： Naoki Sugano , Naoto Hori , Takaharu Michida
IPC分类号： F15B15/02 , F15B11/044 , F15B11/042
CPC分类号： F15B11/044 , F15B11/042 , F15B2211/30525 , F15B2211/3116 , F15B2211/351 , F15B2211/40569 , F15B2211/41527 , F15B2211/45 , F15B2211/46 , F15B2211/50545 , F15B2211/5156 , F15B2211/7058 , F15B2211/761 , F15B2211/8609
摘要： Provided is a hydraulic drive apparatus for working machine capable of preventing an excessive pressure drop on a meter-in side and moving a load in a lowering direction at a stable speed requiring no counter balance valve, including a hydraulic pump, a first hydraulic actuator lowering a first load, an operating device, a first hydraulic circuit including meter-in and meter-out flow passages, a control valve, a meter-in-flow-rate controller, a meter-out-flow-rate controller making a meter-out flow rate not lower than a meter-in flow rate, a second hydraulic actuator, a second hydraulic circuit between the first hydraulic circuit and a tank and for the second hydraulic actuator, a back pressure valve between the second hydraulic circuit and the tank, a regeneration line leading a part of hydraulic fluid from between the second hydraulic circuit and the back pressure valve to the meter-in flow passage, and a check valve in the regeneration line.
摘要翻译： 提供一种用于工作机械的液压驱动装置，其能够防止在计量侧上的过大的压降和以不需要平衡阀的稳定速度沿下降方向移动负载，包括液压泵，第一液压致动器降低 第一负载，操作装置，包括输入和流出流路的第一液压回路，控制阀，流量计流量控制器，流量计流量控制器， 第二液压致动器，第一液压回路和油箱之间的第二液压回路以及用于第二液压致动器的第二液压回路，在第二液压回路和油箱之间的背压阀， 再生线，将一部分液压流体从第二液压回路和背压阀之间引导到入口流路，再生管路中的止回阀。
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公开(公告)号：US20130152575A1
公开(公告)日：2013-06-20
申请号：US13713680
申请日：2012-12-13
发明人： Hiroo Kondo , Takaharu Michida , Katsuki Yamagata , Naoto Hori , Naoya Kitazumi , Satoshi Maekawa , Naoki Sugano
IPC分类号： F15B9/08
CPC分类号： F15B9/08 , F15B11/044 , F15B21/047 , F15B2211/3116 , F15B2211/3157 , F15B2211/329 , F15B2211/353 , F15B2211/46 , F15B2211/7058 , F15B2211/75 , F15B2211/761 , F15B2211/8609
摘要： Provided is a hydraulic driving apparatus for a working machine, preventing an excessive decrease in pressure on a meter-in side and moving a load at a stable speed in a lowering direction. The apparatus comprises: a hydraulic pump; a hydraulic actuator; a manipulation device; a working hydraulic circuit including a meter-in flow passage and a meter-out flow passage; a control valve for changing a state of supply of hydraulic fluid to drive the hydraulic actuator at a speed designated by the manipulation device; a meter-in flow adjuster and a meter-out flow adjuster adapted to adjust a meter-in flow rate and meter-in flow rate respectively to respective value corresponding to the speed designated by the manipulation device; and a relief valve. The meter-in and meter-out flow adjusters have respective flow adjustment characteristics such that the meter-in flow rate is greater than the meter-out flow rate.
摘要翻译： 本发明提供一种用于工作机械的液压驱动装置，防止了进入侧的压力的过度降低，并且在下降方向上以稳定的速度移动负载。 该装置包括：液压泵; 液压执行器; 操纵装置; 工作液压回路，包括流入通道和流出通道; 控制阀，用于改变液压流体的供给状态，以由操纵装置指定的速度驱动液压致动器; 一个流入式流量调节器和一个流出量调节器，适用于分别将流量和流量流量调整到对应于由操纵装置指定的速度的相应值; 和安全阀。 输入和输出流量调节器具有相应的流量调节特性，使得流入流量大于流出流量。
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公开(公告)号：US20140130486A1
公开(公告)日：2014-05-15
申请号：US14077532
申请日：2013-11-12
发明人： Naoki Sugano , Naoto Hori , Takaharu Michida
IPC分类号： F15B15/02
CPC分类号： F15B11/044 , F15B11/042 , F15B2211/30525 , F15B2211/3116 , F15B2211/351 , F15B2211/40569 , F15B2211/41527 , F15B2211/45 , F15B2211/46 , F15B2211/50545 , F15B2211/5156 , F15B2211/7058 , F15B2211/761 , F15B2211/8609
摘要： Provided is a hydraulic drive apparatus for working machine capable of preventing an excessive pressure drop on a meter-in side and moving a load in a lowering direction at a stable speed requiring no counter balance valve, including a hydraulic pump, a first hydraulic actuator lowering a first load, an operating device, a first hydraulic circuit including meter-in and meter-out flow passages, a control valve, a meter-in-flow-rate controller, a meter-out-flow-rate controller making a meter-out flow rate not lower than a meter-in flow rate, a second hydraulic actuator, a second hydraulic circuit between the first hydraulic circuit and a tank and for the second hydraulic actuator, a back pressure valve between the second hydraulic circuit and the tank, a regeneration line leading a part of hydraulic fluid from between the second hydraulic circuit and the back pressure valve to the meter-in flow passage, and a check valve in the regeneration line.
摘要翻译： 提供一种用于工作机械的液压驱动装置，其能够防止在计量侧上的过大的压降和以不需要平衡阀的稳定速度沿下降方向移动负载，包括液压泵，第一液压致动器降低 第一负载，操作装置，包括输入和流出流路的第一液压回路，控制阀，流量计流量控制器，流量计流量控制器， 第二液压致动器，第一液压回路和油箱之间的第二液压回路以及用于第二液压致动器的第二液压回路，在第二液压回路和油箱之间的背压阀， 再生线，将一部分液压流体从第二液压回路和背压阀之间引导到入口流路，再生管路中的止回阀。
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