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公开(公告)号：US07891458B2
公开(公告)日：2011-02-22
申请号：US12303288
申请日：2007-12-07
IPC分类号： B62D5/06
摘要： A priority valve 7 is disposed between a hydraulic pump 2 and a steering valve 4 and is used to supply priority steering cylinders 103a and 103b with pressurized oil discharged from the hydraulic pump 2 by controlling the differential pressure across a meter-in hydraulic line of the steering valve 4 such that the differential pressure is kept at a target value. A pressure sensor 31 for detecting the load pressures of the steering cylinders 103a and 103b is provided. On the basis of the detected load pressures, the target value set for the priority valve 7 is modified by devices including a controller 32, a solenoid valve 33, a pilot hydraulic line 29, and a pressure receiving unit 24c of the priority valve 7. The above configuration enables suppression of a shock occurring at the start of turning of the steering wheel.
摘要翻译： 优先阀7设置在液压泵2和转向阀4之间，并且用于通过控制液压泵2的流入液压管路中的压差来向液压泵2排出的加压油供应优先转向缸103a和103b。 转向阀4使差压保持在目标值。 设置有用于检测转向缸103a，103b的负载压力的压力传感器31。 基于检测到的负载压力，通过包括优先阀7的控制器32，电磁阀33，先导液压管路29和压力接收单元24c的装置来改变对优先阀7设定的目标值。 上述结构能够抑制在方向盘转动开始时发生的冲击。
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公开(公告)号：US20090255750A1
公开(公告)日：2009-10-15
申请号：US12303288
申请日：2007-12-07
摘要： A priority valve 7 is disposed between a hydraulic pump 2 and a steering valve 4 and is used to supply priority steering cylinders 103a and 103b with pressurized oil discharged from the hydraulic pump 2 by controlling the differential pressure across a meter-in hydraulic line of the steering valve 4 such that the differential pressure is kept at a target value. A pressure sensor 31 for detecting the load pressures of the steering cylinders 103a and 103b is provided. On the basis of the detected load pressures, the target value set for the priority valve 7 is modified by devices including a controller 32, a solenoid valve 33, a pilot hydraulic line 29, and a pressure receiving unit 24c of the priority valve 7. The above configuration enables suppression of a shock occurring at the start of turning of the steering wheel.
摘要翻译： 优先阀7设置在液压泵2和转向阀4之间，并且用于通过控制液压泵2的流入液压管路中的压差来向液压泵2排出的加压油供应优先转向缸103a和103b。 转向阀4使差压保持在目标值。 设置有用于检测转向缸103a，103b的负载压力的压力传感器31。 基于检测到的负载压力，通过包括优先阀7的控制器32，电磁阀33，先导液压管路29和压力接收单元24c的装置来改变对优先阀7设定的目标值。 上述结构能够抑制在方向盘转动开始时发生的冲击。
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公开(公告)号：US20140090369A1
公开(公告)日：2014-04-03
申请号：US14118141
申请日：2012-05-17
申请人： Tsuyoshi Nakamura , Kazunori Nakamura , Yasuo Okano , Kouji Ishikawa , Kensuke Sato , Hiroyuki Azuma , Mitsuhiko Kanehama , Yusuke Kajita
发明人： Tsuyoshi Nakamura , Kazunori Nakamura , Yasuo Okano , Kouji Ishikawa , Kensuke Sato , Hiroyuki Azuma , Mitsuhiko Kanehama , Yusuke Kajita
IPC分类号： F15B15/20
CPC分类号： F15B15/20 , E02F9/123 , E02F9/2217 , E02F9/2242 , E02F9/2285 , E02F9/2292 , E02F9/2296
摘要： A hydraulic drive device for a hydraulic excavator, includes: a first hydraulic pump; a first boom directional control valve and a second arm directional control valve which are connected in parallel to the first pump; a second hydraulic pump; and a second boom directional control valve and a first arm directional control valve which are connected in parallel to the second pump; wherein: the hydraulic drive device also includes: a third hydraulic pump; a third boom directional control valve connected to the third pump and controlling the flow of pressure oil supplied to a boom cylinder; and a third arm directional control valve connected in tandem with the third boom directional control valve and controlling the flow of pressure oil supplied to an arm cylinder.
摘要翻译： 一种用于液压挖掘机的液压驱动装置，包括：第一液压泵; 与第一泵并联连接的第一起重臂方向控制阀和第二臂方向控制阀; 第二液压泵; 以及与第二泵并联连接的第二起重臂方向控制阀和第一臂方向控制阀; 其中：液压驱动装置还包括：第三液压泵; 连接到第三泵的第三起重臂方向控制阀，并控制供应到动臂缸的压力油的流动; 以及与第三动臂方向控制阀串联连接的第三臂方向控制阀，并控制供给到手臂缸的压力油的流动。
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公开(公告)号：US09341198B2
公开(公告)日：2016-05-17
申请号：US14118141
申请日：2012-05-17
申请人： Tsuyoshi Nakamura , Kazunori Nakamura , Yasuo Okano , Kouji Ishikawa , Kensuke Sato , Hiroyuki Azuma , Mitsuhiko Kanehama , Yusuke Kajita
发明人： Tsuyoshi Nakamura , Kazunori Nakamura , Yasuo Okano , Kouji Ishikawa , Kensuke Sato , Hiroyuki Azuma , Mitsuhiko Kanehama , Yusuke Kajita
CPC分类号： F15B15/20 , E02F9/123 , E02F9/2217 , E02F9/2242 , E02F9/2285 , E02F9/2292 , E02F9/2296
摘要： A hydraulic drive device for a hydraulic excavator, includes: a first hydraulic pump; a first boom directional control valve and a second arm directional control valve which are connected in parallel to the first pump; a second hydraulic pump; and a second boom directional control valve and a first arm directional control valve which are connected in parallel to the second pump; wherein: the hydraulic drive device also includes: a third hydraulic pump; a third boom directional control valve connected to the third pump and controlling the flow of pressure oil supplied to a boom cylinder; and a third arm directional control valve connected in tandem with the third boom directional control valve and controlling the flow of pressure oil supplied to an arm cylinder.
摘要翻译： 一种用于液压挖掘机的液压驱动装置，包括：第一液压泵; 与第一泵并联连接的第一起重臂方向控制阀和第二臂方向控制阀; 第二液压泵; 以及与第二泵并联连接的第二起重臂方向控制阀和第一臂方向控制阀; 其中：液压驱动装置还包括：第三液压泵; 连接到第三泵的第三起重臂方向控制阀，并控制供应到动臂缸的压力油的流动; 以及与第三动臂方向控制阀串联连接的第三臂方向控制阀，并控制供给到手臂缸的压力油的流动。
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公开(公告)号：US07841307B2
公开(公告)日：2010-11-30
申请号：US11909325
申请日：2006-10-24
IPC分类号： F01P7/02
CPC分类号： E02F9/226 , F01P7/044 , F01P2023/08 , F01P2025/62 , F01P2025/66
摘要： In a cooling fan drive system for a travel type working machine, the rotational speed of a cooling fan is controlled to the optimum rotational speed in accordance with temperature increase of the temperature of an engine cooling water, and the engine rotational speed is smoothly increased when the engine rotational speed is increased under travel acceleration. A fourth fan target rotational speed calculator 35e and a minimum value selector 35f are provided, and under non-operation, the fan target rotational speed is set to a low rotational speed irrespective of the temperature. When an acceleration pedal 12 is depressed to increase the rotational speed of the engine under travel acceleration, the increase of the drive pressure of a hydraulic motor 23 due to increase of the rotation of the cooling fan 9 is suppressed, and the load on the engine 1 is reduced.
摘要翻译： 在用于行驶式加工机的冷却风扇驱动系统中，根据发动机冷却水的温度升高将冷却风扇的转速控制到最佳转速，并且当发动机转速为 发动机转速在行驶加速度下增加。 提供第四风扇目标转速计算器35e和最小值选择器35f，并且在不工作的情况下，将风扇目标转速设定为低转速而与温度无关。 当加速踏板12被按压以增加发动机在行驶加速度下的转速时，由于冷却风扇9的旋转增加而导致的液压马达23的驱动压力的增加被抑制，并且发动机上的负荷 1减少。
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公开(公告)号：US20090025661A1
公开(公告)日：2009-01-29
申请号：US11909325
申请日：2006-10-24
IPC分类号： F01P7/04
CPC分类号： E02F9/226 , F01P7/044 , F01P2023/08 , F01P2025/62 , F01P2025/66
摘要： In a cooling fan drive system for a travel type working machine, the rotational speed of a cooling fan is controlled to the optimum rotational speed in accordance with temperature increase of the temperature of an engine cooling water, and the engine rotational speed is smoothly increased when the engine rotational speed is increased under travel acceleration. A fourth fan target rotational speed calculator 35e and a minimum value selector 35f are provided, and under non-operation, the fan target rotational speed is set to a low rotational speed irrespective of the temperature. When an acceleration pedal 12 is depressed to increase the rotational speed of the engine under travel acceleration, the increase of the drive pressure of a hydraulic motor 23 due to increase of the rotation of the cooling fan 9 is suppressed, and the load on the engine 1 is reduced.
摘要翻译： 在用于行驶式加工机的冷却风扇驱动系统中，根据发动机冷却水的温度升高将冷却风扇的转速控制到最佳转速，并且当发动机转速为 发动机转速在行驶加速度下增加。 提供第四风扇目标转速计算器35e和最小值选择器35f，并且在不工作的情况下，将风扇目标转速设定为低转速而与温度无关。 当加速踏板12被按压以增加发动机在行驶加速度下的转速时，由于冷却风扇9的旋转增加而导致的液压马达23的驱动压力的增加被抑制，并且发动机上的负荷 1减少。
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公开(公告)号：US08919115B2
公开(公告)日：2014-12-30
申请号：US13023789
申请日：2011-02-09
CPC分类号： E02F9/2239 , E02F9/2242 , E02F9/2285 , E02F9/2292 , E02F9/2296 , F15B2211/20576 , F15B2211/30565 , F15B2211/40515 , F15B2211/415 , F15B2211/428 , F15B2211/7142 , F15B2211/781
摘要： The operability when performing a combined arm-crowd and bucket operation can be improved. A hydraulic drive device for a hydraulic excavator includes: a bucket directional control valve and a second arm directional control valve, which are connected in parallel tandem with a first hydraulic pump; a first arm directional control valve that is connected to a second hydraulic pump; and a flow rate restriction device that restricts the flow rate of pressure oil supplied to the second arm directional control valve, during crowd operation of a bucket. This flow rate restriction device includes a variable throttle whose opening is controlled so as to become smaller as a bucket operating device is operated to the crowd side, the variable throttle being provided in a bypass path connecting to the supply port of the second arm directional control valve.
摘要翻译： 可以提高执行组合式斗杆和铲斗操作时的可操作性。 液压挖掘机的液压驱动装置包括：与第一液压泵并联连接的铲斗方向控制阀和第二臂方向控制阀; 与第二液压泵连接的第一臂方向控制阀; 以及流量限制装置，其限制在斗的人群操作期间供应到第二臂方向控制阀的压力油的流量。 该流量限制装置包括可变节流阀，其可随着铲斗操作装置向人群操作而控制开口变小，可变节气门设置在连接到第二臂方向控制器的供给口的旁路 阀。
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公开(公告)号：US07913801B2
公开(公告)日：2011-03-29
申请号：US12523937
申请日：2008-01-22
IPC分类号： B62D5/04
CPC分类号： B62D1/22 , B62D5/09 , B62D12/00 , E02F9/2228 , E02F9/225 , E02F9/2285
摘要： To provide a steering system for a construction vehicle, which is suited not only for traveling on general roadways but also for work at construction sites and can perform high-reliability steering control.A steering system for a construction vehicle is provided with a directional control valve 5 for controlling a flow of pressure oil to body-articulating hydraulic cylinders 2 that perform steering and also with a steering-wheel-operated signal generation means 6 for outputting by operation of a steering wheel 7a a pilot signal to the directional control valve 5 for switching the valve 5. The steering system is also provided with a lever-operated signal generation means for producing by operation of a lever 10a a pilot signal to switch the directional control valve 5, said lever-operated signal generation means including pressure-proportional solenoid valves 12a,12b or the like, selector valves 13a,13b switchable to permit selectively outputting the pilot signal from one of the signal generation means to the directional control valve 5, and an automated switching means for switching the selector valves 13a,13b such that upon operation of the steering wheel 7a, the pilot signal from the steering-wheel-operated signal generation means 6 can be preferentially outputted to the directional control valve 5.
摘要翻译： 提供一种适用于工程车辆的转向系统，不仅适用于一般道路行驶，而且适用于施工现场的工作，还可进行高可靠性的转向控制。 用于施工车辆的转向系统设置有用于控制压力油流向执行转向的身体关节液压缸2的方向控制阀5，以及用于通过操作输出的方向盘操作信号产生装置6输出 方向盘7a向方向控制阀5提供用于切换阀5的导向信号。转向系统还设置有操作杆操作信号产生装置，用于通过操作杆10a产生一个导向信号以切换方向控制阀 如图5所示，所述杠杆操作信号发生装置包括比例电磁阀12a，12b等，切换阀13a，13b可切换以允许选择性地将信号从信号发生装置中的一个输出到方向控制阀5;以及 用于切换选择阀13a，13b的自动切换装置，使得在方向盘7a操作时，来自s的导频信号 可以将方向盘操作信号发生装置6优先输出到方向控制阀5。
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公开(公告)号：US20100228439A1
公开(公告)日：2010-09-09
申请号：US12377393
申请日：2007-12-26
CPC分类号： B62D12/00 , B62D5/065 , B62D5/075 , B62D5/09 , E02F9/225 , E02F9/2253 , E02F9/2285 , E02F9/2296
摘要： A hydraulic steering unit 5 generates a control pressure corresponding to the rotational quantity and rotational direction of the steering wheel 109 on the basis of pressurized oil of a pilot pump 13. Signals of pressure sensors 6a and 6b used to detect the control pressure, and a signal of a front operation detection unit 31, are inputted into a controller 132. A controller 32 and solenoid valves 33a and 33b control a stroke of a steering valve 4 so that the stroke becomes larger with increase in control pressure detected by each of the pressure sensors 6a and 6b. In addition when the operation of a front work device is detected, the controller 32 and the solenoid valves 33a and 33b control the stroke of the steering valve 4 so that the stroke becomes larger than that provided when the operation of the front work device is not detected.
摘要翻译： 液压转向单元5基于先导泵13的加压油产生与方向盘109的旋转量和旋转方向对应的控制压力。用于检测控制压力的压力传感器6a和6b的信号，以及 前部操作检测单元31的信号被输入到控制器132中。控制器32和电磁阀33a和33b控制转向阀4的行程，使得随着每个压力检测到的控制压力的增加，行程变大 传感器6a和6b。 此外，当检测到前工作装置的操作时，控制器32和电磁阀33a和33b控制转向阀4的行程，使得行程变得大于前工作装置的操作时提供的行程 检测到。
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10.发明授权Control system for prime mover and hydraulic pump of hydraulic construction machine 有权液压施工机械原动机和液压泵控制系统
公开(公告)号：US5911506A
公开(公告)日：1999-06-15
申请号：US166848
申请日：1998-10-06
申请人： Kazunori Nakamura , Ei Takahashi , Tsukasa Toyooka , Kouji Ishikawa , Tsuyoshi Nakamura , Yoichi Kowatari , Tadatoshi Shimamura , Genroku Sugiyama , Toichi Hirata
发明人： Kazunori Nakamura , Ei Takahashi , Tsukasa Toyooka , Kouji Ishikawa , Tsuyoshi Nakamura , Yoichi Kowatari , Tadatoshi Shimamura , Genroku Sugiyama , Toichi Hirata
CPC分类号： E02F9/2285 , E02F9/2235 , E02F9/2246 , E02F9/2282 , E02F9/2292 , E02F9/2296
摘要： A reference pump-delivery-rate calculating portion calculates a reference delivery rate of a hydraulic pump by referring to a table stored in a memory based on a control pilot pressure for the hydraulic pump. A target pump-delivery-rate calculating portion divides the reference delivery rate by a ratio of a maximum revolution speed to a target engine revolution speed, thereby calculating a target delivery rate. A target pump tilting calculating portion divides the target delivery rate by an actual engine revolution speed and a constant, thereby calculating a target tilting. A solenoid output current calculating portion calculates a drive current to provide the target tilting and outputs the drive current to a solenoid control valve. The pump delivery rate is thereby controlled with good response following input change of an operation instructing device.
摘要翻译： 参考泵送出速度计算部分基于用于液压泵的控制先导压力参考存储在存储器中的表来计算液压泵的参考输出速率。 目标泵输送速度计算部分将参考输出速率除以最大转速与目标发动机转速的比值，由此计算目标输送速率。 目标泵倾转计算部将目标输送速度除以实际发动机转速和常数，由此计算目标倾斜。 螺线管输出电流计算部分计算驱动电流以提供目标倾斜，并将驱动电流输出到电磁控制阀。 由此，在操作指示装置的输入变化之后，以良好的响应来控制泵送出速度。
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