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公开(公告)号:US09790966B2
公开(公告)日:2017-10-17
申请号:US14354735
申请日:2012-09-11
申请人: Teruo Akiyama , Noboru Iida , Koji Saito , Koji Yamashita
发明人: Teruo Akiyama , Noboru Iida , Koji Saito , Koji Yamashita
CPC分类号: F15B15/02 , E02F9/2217 , E02F9/2242 , E02F9/226 , E02F9/2282 , E02F9/2289 , E02F9/2292 , E02F9/2296 , F15B11/17 , F15B2211/20546 , F15B2211/20561 , F15B2211/20576 , F15B2211/30525 , F15B2211/327 , F15B2211/613 , F15B2211/633 , F15B2211/6346 , F15B2211/7053 , F15B2211/785
摘要: A shuttle valve connects a second flowpath and a drain flowpath when the hydraulic pressure in a first flowpath is greater than the hydraulic pressure in the second flowpath. The shuttle valve connects the first flowpath and the drain flowpath when the hydraulic pressure in a second flowpath is greater than the hydraulic pressure in the first flowpath. The ratio between the pressure receiving area of a first pressure section and the pressure receiving area of a second pressure section is the same as the ratio between the pressure receiving area of a first chamber side and the pressure receiving area of a second chamber side of a cylinder rod.
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公开(公告)号:US20140283510A1
公开(公告)日:2014-09-25
申请号:US14354735
申请日:2012-09-11
申请人: Teruo Akiyama , Noboru Iida , Koji Saito , Koji Yamashita
发明人: Teruo Akiyama , Noboru Iida , Koji Saito , Koji Yamashita
IPC分类号: F15B15/02
CPC分类号: F15B15/02 , E02F9/2217 , E02F9/2242 , E02F9/226 , E02F9/2282 , E02F9/2289 , E02F9/2292 , E02F9/2296 , F15B11/17 , F15B2211/20546 , F15B2211/20561 , F15B2211/20576 , F15B2211/30525 , F15B2211/327 , F15B2211/613 , F15B2211/633 , F15B2211/6346 , F15B2211/7053 , F15B2211/785
摘要: A shuttle valve connects a second flowpath and a drain flowpath when the hydraulic pressure in a first flowpath is greater than the hydraulic pressure in the second flowpath. The shuttle valve connects the first flowpath and the drain flowpath when the hydraulic pressure in a second flowpath is greater than the hydraulic pressure in the first flowpath. The ratio between the pressure receiving area of a first pressure section and the pressure receiving area of a second pressure section is the same as the ratio between the pressure receiving area of a first chamber side and the pressure receiving area of a second chamber side of a cylinder rod.
摘要翻译: 当第一流路中的液压大于第二流路中的液压时,梭阀连接第二流路和排水流路。 当第二流路中的液压大于第一流路中的液压时,梭阀连接第一流路和排水流路。 第一压力部的受压面积与第二压力部的受压面积之比与第一室侧的受压面积和第二室侧的受压面积之比 气缸杆。
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公开(公告)号:US09683585B2
公开(公告)日:2017-06-20
申请号:US14129387
申请日:2012-08-13
申请人: Teruo Akiyama , Noboru Iida , Koji Saito , Takayuki Watanabe , Koji Yamashita
发明人: Teruo Akiyama , Noboru Iida , Koji Saito , Takayuki Watanabe , Koji Yamashita
IPC分类号: F15B11/042 , E02F9/22 , F15B11/04
CPC分类号: F15B11/0423 , E02F9/2217 , E02F9/2228 , E02F9/2232 , E02F9/2285 , E02F9/2289 , E02F9/2292 , E02F9/2296 , F15B11/0413 , F15B2211/20546 , F15B2211/20561 , F15B2211/20576 , F15B2211/27 , F15B2211/613 , F15B2211/633 , F15B2211/6346 , F15B2211/7053 , F15B2211/785
摘要: A hydraulic driving system includes a hydraulic pump, a driving source, a hydraulic cylinder, a closed circuit hydraulic path between the pump and cylinder, a pump-flow-rate control unit controlling a discharge flow rate of the pump, a flow rate control valve between the pump and the cylinder in the fluid path, a directional control unit, a target flow rate setting unit and a control device. The directional control unit allows a flow of fluid from the pump to the cylinder and prohibits a flow of fluid from the cylinder to the pump when fluid is supplied from the pump to the cylinder via the flow rate control valve. The control device controls fluid flow to the cylinder with the flow rate control valve when the target flow rate is within a prescribed range, and with the pump-flow-rate control unit when the target flow rate is greater than the prescribed range.
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公开(公告)号:US20140130487A1
公开(公告)日:2014-05-15
申请号:US14129387
申请日:2012-08-13
申请人: Teruo Akiyama , Noboru Iida , Koji Saito , Takayuki Watanabe , Koji Yamashita
发明人: Teruo Akiyama , Noboru Iida , Koji Saito , Takayuki Watanabe , Koji Yamashita
IPC分类号: F15B11/042 , F15B11/04 , E02F9/22
CPC分类号: F15B11/0423 , E02F9/2217 , E02F9/2228 , E02F9/2232 , E02F9/2285 , E02F9/2289 , E02F9/2292 , E02F9/2296 , F15B11/0413 , F15B2211/20546 , F15B2211/20561 , F15B2211/20576 , F15B2211/27 , F15B2211/613 , F15B2211/633 , F15B2211/6346 , F15B2211/7053 , F15B2211/785
摘要: A hydraulic driving system includes a hydraulic pump, a driving source, a hydraulic cylinder, a closed circuit hydraulic path between the pump and cylinder, a pump-flow-rate control unit controlling a discharge flow rate of the pump, a flow rate control valve between the pump and the cylinder in the fluid path, a directional control unit, a target flow rate setting unit and a control device. The directional control unit allows a flow of fluid from the pump to the cylinder and prohibits a flow of fluid from the cylinder to the pump when fluid is supplied from the pump to the cylinder via the flow rate control valve. The control device controls fluid flow to the cylinder with the flow rate control valve when the target flow rate is within a prescribed range, and with the pump-flow-rate control unit when the target flow rate is greater than the prescribed range.
摘要翻译: 液压驱动系统包括液压泵,驱动源,液压缸,泵和缸之间的闭路液压路径,控制泵的排出流量的泵流量控制单元,流量控制阀 在流体路径中的泵和缸之间,方向控制单元,目标流量设定单元和控制装置。 方向控制单元允许流体从泵到气缸流动,并且当流体经由流量控制阀从泵供应到气缸时,阻止流体从气缸流到泵。 当目标流量在规定范围内时,控制装置利用流量控制阀,当目标流量大于规定范围时,利用泵流量控制单元来控制流向缸的流体。
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公开(公告)号:US09810246B2
公开(公告)日:2017-11-07
申请号:US14129414
申请日:2012-08-13
申请人: Teruo Akiyama , Noboru Iida , Kenji Oshima , Koji Saito
发明人: Teruo Akiyama , Noboru Iida , Kenji Oshima , Koji Saito
CPC分类号: F15B15/02 , E02F9/2235 , E02F9/2289 , E02F9/2292 , E02F9/2296 , F15B21/087 , F15B2211/20546 , F15B2211/20561 , F15B2211/20576 , F15B2211/27 , F15B2211/613 , F15B2211/633 , F15B2211/6336 , F15B2211/6346 , F15B2211/7053 , F15B2211/785
摘要: A hydraulic driving system includes a hydraulic cylinder with a cylinder tube and a cylinder rod, a main pump, a hydraulic-fluid path, a charge pump, a stroke position detecting unit, and a pump control unit. The hydraulic-fluid path forms a closed circuit between a main pump and the hydraulic cylinder. The cylinder rod expands or contracts depending on how hydraulic fluid is supplied and exhausted to and from first and second chambers. The charge pump replenishes hydraulic-fluid in the hydraulic-fluid path. The pump control unit performs flow-rate reduction control in which the pump control unit reduces a suction flow rate so that a suction flow rate of the main pump is equal to or less than a maximum discharge flow rate of the charge pump when the stroke position becomes closer to a stroke end of the cylinder rod than a prescribed reference position during the flow rate reduction control.
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公开(公告)号:US20140123639A1
公开(公告)日:2014-05-08
申请号:US14129414
申请日:2012-08-13
申请人: Teruo Akiyama , Noboru Iida , Kenji Oshima , Koji Saito
发明人: Teruo Akiyama , Noboru Iida , Kenji Oshima , Koji Saito
IPC分类号: F15B15/02
CPC分类号: F15B15/02 , E02F9/2235 , E02F9/2289 , E02F9/2292 , E02F9/2296 , F15B21/087 , F15B2211/20546 , F15B2211/20561 , F15B2211/20576 , F15B2211/27 , F15B2211/613 , F15B2211/633 , F15B2211/6336 , F15B2211/6346 , F15B2211/7053 , F15B2211/785
摘要: A hydraulic driving system includes a hydraulic cylinder with a cylinder tube and a cylinder rod, a main pump, a hydraulic-fluid path, a charge pump, a stroke position detecting unit, and a pump control unit. The hydraulic-fluid path forms a closed circuit between a main pump and the hydraulic cylinder. The cylinder rod expands or contracts depending on how hydraulic fluid is supplied and exhausted to and from first and second chambers. The charge pump replenishes hydraulic-fluid in the hydraulic-fluid path. The pump control unit performs flow-rate reduction control in which the pump control unit reduces a suction flow rate so that a suction flow rate of the main pump is equal to or less than a maximum discharge flow rate of the charge pump when the stroke position becomes closer to a stroke end of the cylinder rod than a prescribed reference position during the flow rate reduction control.
摘要翻译: 液压驱动系统包括具有气缸管和气缸杆的液压缸,主泵,液压流路,充电泵,行程位置检测单元和泵控制单元。 液压路径在主泵和液压缸之间形成闭合回路。 气缸杆根据液压油如何供给和排出到第一和第二室进行膨胀或收缩。 电荷泵补充液压流体路径中的液压流体。 泵控制单元执行流量降低控制,其中,泵控制单元降低吸入流量,使得当泵的行程位置(3)时主泵的吸入流量等于或小于电动泵的最大排出流量 在流量降低控制期间比在规定的基准位置更靠近气缸杆的行程端。
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公开(公告)号:US09328480B2
公开(公告)日:2016-05-03
申请号:US14127652
申请日:2012-08-13
申请人: Teruo Akiyama , Noboru Iida , Kenji Oshima , Kenji Sasano
发明人: Teruo Akiyama , Noboru Iida , Kenji Oshima , Kenji Sasano
CPC分类号: E02F9/2025 , E02F9/123 , E02F9/2037 , E02F9/2235 , E02F9/2289 , E02F9/2292 , E02F9/2296 , F15B11/02 , F15B11/028 , F15B11/17 , F15B2211/20546 , F15B2211/20561 , F15B2211/20576 , F15B2211/27 , F15B2211/50518 , F15B2211/5159 , F15B2211/526 , F15B2211/6346 , F15B2211/665 , F15B2211/6653 , F15B2211/6654 , F15B2211/7053 , F15B2211/7058 , F15B2211/7135
摘要: In a hydraulic excavator, a hydraulic cylinder drives a boom via a hydraulic fluid discharged from a first hydraulic pump. A first hydraulic circuit connects the first hydraulic pump and the hydraulic cylinder and forms a closed circuit therebetween. A hydraulic motor rotates a revolving upper unit with hydraulic fluid discharged from a second hydraulic pump. A second hydraulic circuit independent from the first hydraulic circuit connects the second hydraulic pump and the hydraulic motor. A motor hydraulic pressure reduction unit reduces the driving hydraulic pressure of the hydraulic motor when a predetermined condition is satisfied. The predetermined condition is a condition in which an operation of the boom operating member to raise the boom and an operation of the rotation operating member to rotate the revolving upper unit are conducted together and an operation amount of the boom operating member is equal to or greater than a predetermined threshold.
摘要翻译: 在液压挖掘机中,液压缸通过从第一液压泵排出的液压流体驱动动臂。 第一液压回路连接第一液压泵和液压缸,并在其间形成闭合回路。 液压马达利用从第二液压泵排出的液压流体旋转旋转的上部单元。 独立于第一液压回路的第二液压回路连接第二液压泵和液压马达。 当满足预定条件时,电动机液压减压单元降低液压马达的驱动液压。 预定条件是将起重臂操作构件升高起重臂的动作和旋转操作构件使旋转上部单元旋转的动作一起进行的状态,动臂操作构件的操作量等于或大于 超过预定阈值。
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公开(公告)号:US20140123847A1
公开(公告)日:2014-05-08
申请号:US14127652
申请日:2012-08-13
申请人: Teruo Akiyama , Noboru Iida , Kenji Oshima , Kenji Sasano
发明人: Teruo Akiyama , Noboru Iida , Kenji Oshima , Kenji Sasano
IPC分类号: E02F9/20 , F15B11/02 , F15B11/028 , E02F9/22
CPC分类号: E02F9/2025 , E02F9/123 , E02F9/2037 , E02F9/2235 , E02F9/2289 , E02F9/2292 , E02F9/2296 , F15B11/02 , F15B11/028 , F15B11/17 , F15B2211/20546 , F15B2211/20561 , F15B2211/20576 , F15B2211/27 , F15B2211/50518 , F15B2211/5159 , F15B2211/526 , F15B2211/6346 , F15B2211/665 , F15B2211/6653 , F15B2211/6654 , F15B2211/7053 , F15B2211/7058 , F15B2211/7135
摘要: In a hydraulic excavator, a hydraulic cylinder drives a boom via a hydraulic fluid discharged from a first hydraulic pump. A first hydraulic circuit connects the first hydraulic pump and the hydraulic cylinder and forms a closed circuit therebetween. A hydraulic motor rotates a revolving upper unit with hydraulic fluid discharged from a second hydraulic pump. A second hydraulic circuit independent from the first hydraulic circuit connects the second hydraulic pump and the hydraulic motor. A motor hydraulic pressure reduction unit reduces the driving hydraulic pressure of the hydraulic motor when a predetermined condition is satisfied. The predetermined condition is a condition in which an operation of the boom operating member to raise the boom and an operation of the rotation operating member to rotate the revolving upper unit are conducted together and an operation amount of the boom operating member is equal to or greater than a predetermined threshold.
摘要翻译: 在液压挖掘机中,液压缸通过从第一液压泵排出的液压流体驱动动臂。 第一液压回路连接第一液压泵和液压缸,并在其间形成闭合回路。 液压马达利用从第二液压泵排出的液压油旋转旋转的上部单元。 独立于第一液压回路的第二液压回路连接第二液压泵和液压马达。 当满足预定条件时,电动机液压减压单元降低液压马达的驱动液压。 预定条件是将起重臂操作构件升高起重臂的动作和旋转操作构件使旋转上部单元旋转的动作一起进行的状态,动臂操作构件的操作量等于或大于 超过预定阈值。
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公开(公告)号:US09709076B2
公开(公告)日:2017-07-18
申请号:US14356705
申请日:2012-09-11
申请人: Teruo Akiyama , Noboru Iida , Kenji Oshima , Kenji Sasano
发明人: Teruo Akiyama , Noboru Iida , Kenji Oshima , Kenji Sasano
CPC分类号: F15B1/04 , E02F9/2217 , E02F9/2235 , E02F9/2285 , E02F9/2289 , E02F9/2292 , E02F9/2296 , F15B11/17 , F15B2211/20546 , F15B2211/20561 , F15B2211/20576 , F15B2211/275 , F15B2211/30525 , F15B2211/327 , F15B2211/613 , F15B2211/625 , F15B2211/6306 , F15B2211/633 , F15B2211/6346 , F15B2211/7053
摘要: An operating state determining unit determines whether a hydraulic cylinder is in operation or not in operation. A discharge pressure reducing unit reduces the discharge pressure of a charge pump. A discharge pressure control unit controls the discharge pressure reducing unit when the hydraulic cylinder in not in operation to reduce the discharge pressure of the charge pump to a low pressure lower than a normal pressure. The normal pressure is the discharge pressure of the charge pump when the hydraulic cylinder is in operation. An accumulator is connected to a charge flowpath. A one-way valve is disposed between the accumulator and the charge pump. The one-way valve allows the flow of hydraulic fluid from the charge pump to the accumulator and prohibits the flow of hydraulic fluid from the accumulator to the charge pump.
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公开(公告)号:US20140345265A1
公开(公告)日:2014-11-27
申请号:US14356705
申请日:2012-09-11
申请人: Teruo Akiyama , Noboru Iida , Kenji Oshima , Kenji Sasano
发明人: Teruo Akiyama , Noboru Iida , Kenji Oshima , Kenji Sasano
IPC分类号: F15B1/04
CPC分类号: F15B1/04 , E02F9/2217 , E02F9/2235 , E02F9/2285 , E02F9/2289 , E02F9/2292 , E02F9/2296 , F15B11/17 , F15B2211/20546 , F15B2211/20561 , F15B2211/20576 , F15B2211/275 , F15B2211/30525 , F15B2211/327 , F15B2211/613 , F15B2211/625 , F15B2211/6306 , F15B2211/633 , F15B2211/6346 , F15B2211/7053
摘要: An operating state determining unit determines whether a hydraulic cylinder is in operation or not in operation. A discharge pressure reducing unit reduces the discharge pressure of a charge pump. A discharge pressure control unit controls the discharge pressure reducing unit when the hydraulic cylinder in not in operation to reduce the discharge pressure of the charge pump to a low pressure lower than a normal pressure. The normal pressure is the discharge pressure of the charge pump when the hydraulic cylinder is in operation. An accumulator is connected to a charge flowpath. A one-way valve is disposed between the accumulator and the charge pump. The one-way valve allows the flow of hydraulic fluid from the charge pump to the accumulator and prohibits the flow of hydraulic fluid from the accumulator to the charge pump.
摘要翻译: 操作状态确定单元确定液压缸是否在操作中。 排出压力降低单元降低电荷泵的排出压力。 当不操作液压缸时,排出压力控制单元控制排出压力降低单元,以将电荷泵的排出压力降低到低于常压的低压。 正常压力是液压缸运行时电荷泵的排出压力。 蓄电池连接到充电流路。 蓄能器和电荷泵之间设有一个单向阀。 单向阀允许液压流体从充电泵流到蓄能器,并且禁止液压流体从蓄能器流到电荷泵。
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