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公开(公告)号：EP3597942A1
公开(公告)日：2020-01-22
申请号：EP18766949.4
申请日：2018-01-31
发明人： ITO, Masamichi , OOKI, Takatoshi
摘要： There is provided a hydraulic driving device for working machine having operability handling a change in burden weight in a front working device due to a loaded burden and the like when the working machine that accumulates energy in an accumulator and recovers and regenerates the energy performs an operation of lowering the front working device. A hydraulic driving device 5 includes a main pump 101, a boom cylinder 3, a tank 20, a flow rate control valve 6, an accumulator 300, a first differential pressure control valve 201, and a second differential pressure control valve 202. The first differential pressure control valve 201 is located between the boom cylinder 3 and the accumulator 300. The first differential pressure control valve 201 performs control on discharge oil from the boom cylinder 3 such that a differential pressure between before and after the flow rate control valve 6 becomes a target differential pressure. The second differential pressure control valve 202 is located between the accumulator 300 and the tank 20. The second differential pressure control valve 202 performs control on the discharge oil such that a differential pressure between an upstream pressure and a downstream pressure of the flow rate control valve 6 and the first differential pressure control valve 201 becomes the target differential pressure. The first and the second differential pressure control valves 201 and 202 are configured such that the target differential pressure increases according to an increase in pressure of the discharge oil.
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公开(公告)号：EP3203087A1
公开(公告)日：2017-08-09
申请号：EP14902957.1
申请日：2014-10-02
CPC分类号： E02F3/425 , E02F3/32 , E02F9/22 , E02F9/2217 , E02F9/2225 , E02F9/2271 , E02F9/2285 , E02F9/2292 , E02F9/2296 , F15B11/16 , F15B21/14 , F15B2211/20546 , F15B2211/46 , F15B2211/6313 , F15B2211/6326 , F15B2211/6336 , F15B2211/6346 , F15B2211/7053 , F15B2211/71 , F15B2211/88
摘要： When hydraulic fluid discharged from a hydraulic actuator is to be recovered for driving a different hydraulic actuator, the recovery frequency is increased to achieve further energy saving. To this end, a pressure increasing circuit 36 is provided in which a communication pressure increasing valve 12 is disposed in a communication passage 26 that connects a bottom side line 23 of and a rod side line 24 a boom cylinder 4. A recovery control valve 11 is controlled such that, when a first operation unit 5 is operated in a boom lowering direction (own weight falling direction of the boom) and a second operation unit 6 is operated simultaneously, only if the pressure at the bottom side of the boom cylinder 4 is higher than the pressure at the arm cylinder side that is a recovery destination of hydraulic fluid, the recovery control valve 11 is opened to recover the flow rate discharged from the bottom side of the boom cylinder 4 to the arm cylinder side.
摘要翻译： 当从液压致动器排出的液压流体被回收用于驱动不同的液压致动器时，回收频率增加以实现进一步的节能。 为此设置增压回路36，其中连通增压阀12布置在连接通道26和连杆侧线24的连通通道26中，所述连通通道26连接到动臂缸4的杆侧线24和回收控制阀11 当第一操作单元5在动臂下降方向（动臂的自重下降方向）上被操作并且第二操作单元6被同时操作时，只有当动臂油缸4的底侧处的压力 比作为工作油的回收目标的斗杆油缸侧的压力高时，恢复控制阀11打开，恢复从动臂油缸4的底侧向斗杆油缸侧排出的流量。
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公开(公告)号：EP2963191A1
公开(公告)日：2016-01-06
申请号：EP15174221.0
申请日：2015-06-29
摘要： Provided is a hydraulic system for a construction machinery capable of suppressing irregularity in the operation of the front structure not intended by the operator. The hydraulic system comprises: a regeneration motor 55 adapted to be driven by return fluid from a bottom port of a boom cylinder; a regeneration electric motor 54 adapted to convert rotary power of the regeneration motor into electric energy; return fluid control valves adapted to control the flow of the return fluid according to pilot pressure that is led from the pilot hydraulic pressure source 45 in conjunction with an operation on a boom control lever; solenoid valves for return fluid control valve adapted to control the pilot pressures for driving the return fluid control valves; and a malfunction prevention device adapted to be activated by pressure fluctuation caused by malfunction of a solenoid valve for return fluid control valve, for example, and interrupts the delivery of the pilot secondary pressure from the solenoid valve for return fluid control valve to the corresponding return fluid control valve.
摘要翻译： 提供一种用于能够抑制操作者不希望的前部结构的操作的不规则性的工程机械的液压系统。 液压系统包括：再生电动机55，其适于由来自动臂缸的底部端口的返回流体驱动; 适于将再生电动机的旋转动力转换为电能的再生电动机54; 返回流体控制阀，其适于根据从先导液压源45引导的先导压力结合在动臂控制杆上的操作来控制返回流体的流量; 用于返回流体控制阀的电磁阀，其适于控制用于驱动回流控制阀的先导压力; 以及故障防止装置，其例如适用于由于用于返回流体控制阀的电磁阀的故障引起的压力波动而被启动，并且中断从用于返回流体控制阀的电磁阀到相应回程的先导二次压力的传送 流体控制阀。
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公开(公告)号：EP1286057A1
公开(公告)日：2003-02-26
申请号：EP02700600.6
申请日：2002-02-18
发明人： ARIGA, Nobuei , SUGIYAMA, Genroku , TANAKA, Hideaki , TOYOOKA, Tsukasa , EGASHIRA, Masaki , OOKI, Takatoshi
IPC分类号： F15B11/02
CPC分类号： F15B11/17 , E02F9/2232 , E02F9/2235 , E02F9/2292 , E02F9/2296 , F04B23/06 , F04B49/08 , F15B11/165 , F15B2211/20553 , F15B2211/20584 , F15B2211/3052 , F15B2211/30525 , F15B2211/3059 , F15B2211/3116 , F15B2211/31576 , F15B2211/6054 , F15B2211/6055 , F15B2211/6309 , F15B2211/6343 , F15B2211/6656 , F15B2211/7051 , F15B2211/7058 , F15B2211/7135 , F15B2211/781
摘要： To keep one of three hydraulic pumps unaffected by variations in torque of the remaining hydraulic pumps when the three hydraulic pumps are used, displacements of the first and second hydraulic pumps are controlled based on their own delivery pressures P1,P2 and a pressure P3' obtained by reducing through a reducing valve 14 a delivery pressure P3 from the third hydraulic pump, while a displacement of the third hydraulic pump 3 is controlled only by its own delivery pressure P3. The pressure oil delivered from the third hydraulic pump 3, therefore, remains unaffected by variations in delivery flow rates from the first and second hydraulic pumps 1,2, in other words, by variations in their torque consumptions, so that the third hydraulic pump is assured to provide a stable flow rate.
摘要翻译： 当使用三个液压泵时，为了保持三个液压泵中的一个不受剩余液压泵的扭矩变化的影响，基于其自身的输送压力P1，P2和获得的压力P3'来控制第一和第二液压泵的位移 通过减压阀14减少来自第三液压泵的输送压力P3，而第三液压泵3的排量仅由其自身的输送压力P3控制。 因此，从第三液压泵3输送的压力油不受来自第一和第二液压泵1,2的输送流量的变化的影响，换句话说，它们的扭矩消耗的变化，使得第三液压泵是 保证提供稳定的流量。
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公开(公告)号：EP3026272B1
公开(公告)日：2019-09-11
申请号：EP14829246.9
申请日：2014-07-24
发明人： OOKI, Takatoshi , HIJIKATA, Seiji
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公开(公告)号：EP2698479B1
公开(公告)日：2018-06-13
申请号：EP12772007.6
申请日：2012-04-06
CPC分类号： E02F9/26 , E02F9/2066 , E02F9/2296
摘要： Disclosed is a display device 5 for a work machine having an engine 9, a hydraulic pump 10 driven by the engine, a boom cylinder 3d, an arm cylinder 3e, a bucket cylinder 3f, and other actuators driven by a hydraulic fluid supplied from the hydraulic pump 10, and an operating device 6 for operating the actuators 3d, 3e, 3f. The display device 5 includes an idle state display section 50a for displaying an engine revolution speed N as no-manipulation period operating state information which is related to an engine load that is imposed while the operating device 6 is not manipulated. This makes it possible to inform an operator of the status of the engine load in an idle state for the purpose of prompting the operator to transition into a fuel-efficient state.
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公开(公告)号：EP3301229B1
公开(公告)日：2019-12-18
申请号：EP17159127.4
申请日：2017-03-03
IPC分类号： E02F9/22 , F15B11/024 , F15B21/14
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公开(公告)号：EP2711470B1
公开(公告)日：2016-12-28
申请号：EP12785881.9
申请日：2012-05-10
CPC分类号： E02F9/123 , B60K6/46 , B60K7/0015 , B60K17/10 , B60K25/00 , B60K25/04 , B60K2001/0416 , B60L1/003 , B60L11/005 , B60L11/12 , B60L2200/40 , B60L2250/16 , B60Y2200/41 , B60Y2200/412 , B60Y2200/415 , E02F9/2075 , E02F9/2095 , E02F9/226 , E02F9/2296 , E02F9/267 , Y02T10/6217 , Y02T10/7022 , Y02T10/7077
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公开(公告)号：EP1988221B1
公开(公告)日：2012-08-01
申请号：EP06843105.5
申请日：2006-12-22
CPC分类号： E02F9/226 , E02F9/123 , E02F9/128 , E02F9/2075 , E02F9/2296 , F15B21/087 , F15B2211/20523 , F15B2211/20546 , F15B2211/3116 , F15B2211/329 , F15B2211/50527 , F15B2211/5059 , F15B2211/6336 , F15B2211/6346 , F15B2211/7058
摘要： A rotation drive device for a construction machine, enabling the operator to operate the machine according to their intension to increase safety on the machine. A rotation control means (55A) has a table (11) of lever input amount and torque and a table (13) of actual rotational speed and torque. The minimum value of torque that is obtained from each of these tables on the basis of a lever input amount and the actual rotational speed of a motor is defined as starting torque. The rotation control means (55A) further has table (15) of lever input amount and meter-out restriction area and a table (119) of actual rotational speed and relief torque. Meter-out torque is calculated by using the meter-out restriction area that is obtained from the table of lever input amount and meter-out restriction area on the basis of the lever input amount and the actual rotational speed of the motor, and the minimum value of the meter-out torque and relief torque is defined as brake torque.
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公开(公告)号：EP1286057B1
公开(公告)日：2010-10-06
申请号：EP02700600.6
申请日：2002-02-18
发明人： ARIGA, Nobuei , SUGIYAMA, Genroku , TANAKA, Hideaki , TOYOOKA, Tsukasa , EGASHIRA, Masaki , OOKI, Takatoshi
CPC分类号： F15B11/17 , E02F9/2232 , E02F9/2235 , E02F9/2292 , E02F9/2296 , F04B23/06 , F04B49/08 , F15B11/165 , F15B2211/20553 , F15B2211/20584 , F15B2211/3052 , F15B2211/30525 , F15B2211/3059 , F15B2211/3116 , F15B2211/31576 , F15B2211/6054 , F15B2211/6055 , F15B2211/6309 , F15B2211/6343 , F15B2211/6656 , F15B2211/7051 , F15B2211/7058 , F15B2211/7135 , F15B2211/781
摘要： A hydraulic circuit of construction machinery, wherein, when three hydraulic pumps are used, the displacement volumes of first and second hydraulic pumps are controlled based on the discharge pressures P1 and P2 of the first and second hydraulic pumps and a discharge pressure P3' obtained by reducing the discharge pressure P3 of a third hydraulic pump by a pressure reducing valve (14) and the displacement volume of the third hydraulic pump (3) is controlled only by the discharge pressure of the third hydraulic pump (3) so that one of the three hydraulic pumps is not affected by the variation of torque of the other hydraulic pumps, whereby a stable flow can be assured by preventing the pressure oil discharged from the third hydraulic pump (3) from being affected by the variation of the discharged flow from the first and second hydraulic pumps (1) and (2), i.e., by the variation of a torque consumption.
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