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公开(公告)号：EP3604823A1
公开(公告)日：2020-02-05
申请号：EP17903375.8
申请日：2017-11-07
发明人： KAI Takamasa , TAKAHASHI Hiromasa , SAITOH Teppei , SHIMIZU Juri
IPC分类号： F15B11/044 , E02F9/20 , F15B11/02 , F15B11/024 , F15B11/08
摘要： A construction machine includes a bidirectionally tiltable type hydraulic pump 2, a hydraulic cylinder 1 having a cap chamber 1e and a rod chamber 1f, a first flow path 11 connecting the hydraulic pump 2 and the cap chamber 1e, a second flow path 12 connecting the hydraulic pump 2 and the rod chamber 1f, a discharge flow path 16 branched from the first flow path 11, a discharge valve 32 that is disposed in the discharge flow path 16 and controls a discharge rate of hydraulic working oil from the cap chamber 1e to the discharge flow path 16, an operation device 54 that instructs an action of the hydraulic cylinder 1, and a controller 56. The controller 56 controls the hydraulic pump 2 and the discharge valve 32 such that at least a part of hydraulic working oil discharged from the cap chamber 1e is discharged to the discharge flow path 16 when an operation amount of the operation device 54 lies within a fine operation region during a pulling action of the hydraulic cylinder 1 in a state that a load is applied in a contraction direction. Accordingly, operability improves during fine operation of the pulling action of the hydraulic cylinder in the state that the load is applied in the contraction direction.
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公开(公告)号：EP3486502A1
公开(公告)日：2019-05-22
申请号：EP17827394.2
申请日：2017-06-26
摘要： Provided is a construction machine capable of detecting a stuck-open state of a surplus flow control valve in real time during operation without involving a reduction in the operational speed. The construction machine is equipped with: a surplus flow control valve control section configured to output a closing command to a first surplus flow control valve at the operation start when an operation amount signal of an operation lever device is detected; a pump delivery control section configured to output a delivery flow rate command to an adjustment section of an open circuit pump; an assist valve control section configured to continue to output a closing command from before to an assist valve; a sticking detection determination section configured to compare a pressure signal with a previously set threshold value and determining that the surplus flow control valve is in a stuck-open state when the pressure signal is less than the threshold value and determining that the surplus flow control valve is normal when the pressure signal exceeds the threshold value; and a stop signal generating section configured to input therein a sticking determination signal, output in the case of a stuck-open state a control signal maintaining a closed state of the assist valve to the assist valve control section, and output in the case of a normal state a control signal causing the assist valve to perform an opening operation to the assist valve control section.
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公开(公告)号：EP3043078A1
公开(公告)日：2016-07-13
申请号：EP14840826.3
申请日：2014-09-01
发明人： SHIMIZU Juri , SAITOH Teppei , MIZUOCHI Mariko , HIRAKU Kenji , ISHII Akinori , TAKAHASHI Hiromasa , KUSAMA Takashi
CPC分类号： E02F9/22 , E02F9/2242 , E02F9/2267 , E02F9/2278 , E02F9/2289 , E02F9/2292 , E02F9/2296 , F15B11/042 , F15B11/17 , F15B2211/20561 , F15B2211/20576 , F15B2211/27 , F15B2211/3059 , F15B2211/7135
摘要： To provide a driving device capable of improving the operability of a plurality of single rod hydraulic cylinders. The present invention takes a construction provided with a closed circuit A in which first and third hydraulic pumps 12, 14 and a boom cylinder 1 are connected through selector valves 43a, 45a in a closed-circuit fashion, a plurality of open circuits E, F provided with second and and fourth hydraulic pumps 13, 15 and selector valves 44a, 46a that switch the supply destinations of hydraulic oils flowing out from the second and and fourth hydraulic pumps 13, 15, and a connection passage 301 connected to sides of the selector valves 44a, 46a from which sides hydraulic oil flows out, and connected to the closed circuit A.
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公开(公告)号：EP3839267A1
公开(公告)日：2021-06-23
申请号：EP20765841.0
申请日：2020-02-18
摘要： To make it possible to prevent a decrease in work speed due to a decrease in the speed of a given actuator when an operator unintentionally performs a fine operation of the control lever of the other actuator in a state in which the given actuator is driven by the hydraulic fluid delivered from a plurality of pumps, a controller (41) sets, as a composite dead zone line serving as a boundary of a composite dead zone, a composite dead zone line such that as an operation amount in one direction of a control lever (12L) or (13L) of a control lever device (12) or (13) is increased, the width of the composite dead zone corresponding to an operation amount in the other direction of the control lever is widened, and corrects the operation amount in the other direction such that the demanded flow rate of an actuator increases from zero, when the control lever is operated in the other direction in a state in which the operation amount in the one direction of the control lever remains within a range of the composite dead zone, and the operation amount in the other direction exceeds the composite dead zone line.
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公开(公告)号：EP3073125A1
公开(公告)日：2016-09-28
申请号：EP14864885.0
申请日：2014-11-07
发明人： TAKAHASHI Hiromasa
CPC分类号： E02F3/435 , E02F9/2207 , E02F9/2235 , E02F9/2289 , E02F9/2292 , E02F9/2296 , F15B11/17 , F15B2211/20561 , F15B2211/20569 , F15B2211/20576 , F15B2211/27 , F15B2211/30595 , F15B2211/71
摘要： Provided is a work machine driving device which can reduce unnecessary switching control of switching valves. The present invention is configured so that at least two closed-circuit hydraulic pumps 2a to 2f can be connected in a closed loop to any one of hydraulic actuators 7a to 7c, 10c through electromagnetic switching valves 12, in which a controller 16 includes a priority order calculating circuit 31 which calculates the allocation of the closed-circuit hydraulic pumps 2a to 2f to the hydraulic actuators 7a to 7c, 10c according to operation of operation levers 17a, 17b and a priority order map 32 determining priority connection relationships between the closed-circuit hydraulic pumps 2a to 2f and the hydraulic actuators 7a to 7c, 10c, and the priority order calculating circuit 31 selects and allocates an unallocated closed-circuit hydraulic pump 2a to 2f when the number of closed-circuit hydraulic pumps 2a to 2f to be allocated increases.
摘要翻译： 提供了一种能够减少开关阀的不必要的开关控制的作业机械驱动装置。 本发明被构造成使得至少两个闭路液压泵2a至2f可以通过电磁切换阀12以闭环方式连接到液压致动器7a至7c，10c中的任何一个，其中控制器16包括优先级 根据操作杆17a，17b的操作计算闭锁液压泵2a至2f对液压致动器7a至7c，10c的分配的顺序计算电路31以及确定闭路液压泵2a至2f之间的优先连接关系的优先级顺序图32。 电动液压泵2a〜2f以及液压致动器7a〜7c，10c，优先顺序运算电路31选择并分配未分配的闭路液压泵2a〜2f， 分配增加。
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公开(公告)号：EP4015712A1
公开(公告)日：2022-06-22
申请号：EP20870901.4
申请日：2020-09-30
发明人： SHIMIZU Juri , HIRAKU Kenji , TAKAHASHI Hiromasa , SAITOH Teppei
摘要： A construction machine that makes it possible for an operator to linearly push a bucket simply by operating an arm in a pushing direction is provided. A controller 50 is configured to, in a case where a straight locus is selected by a bucket locus selecting device 52, calculate a constant flow rate ratio α according to a boom initial angle that is an angle of a boom 2 sensed by a boom angle sensor 33 at a time point when an arm 4 is operated in a pushing direction by an operation device 51, and control the delivery flow rate of a first hydraulic pump 12 such that a hydraulic fluid is discharged from a cap chamber 1a of a boom cylinder 1 at a flow rate Qb obtained by multiplying a flow rate Qa of a flow supplied to a cap chamber 3a of an arm cylinder 3 by the flow rate ratio α while the arm 4 is operated in the pushing direction by the operation device 51 and there is not an instruction for operation of the boom 2.
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公开(公告)号：EP3872354A1
公开(公告)日：2021-09-01
申请号：EP20762036.0
申请日：2020-02-12
发明人： KAI Takamasa , SHIMIZU Juri , HIRAKU Kenji , TAKAHASHI Hiromasa , SAITOU Teppei
摘要： To provide a construction machine that has a hydraulic system mounted thereon in which a closed-circuit pump, and an open-circuit pump and a proportional valve are arranged as a pair, and that makes it possible to use an unused open-circuit pump or proportional valve to accelerate the speed of a single rod hydraulic cylinder when the single rod hydraulic cylinder and a hydraulic motor are driven simultaneously. A controller (51) controls a cap-side selector valve (46) and a rod-side selector valve (47) such that a particular open-circuit pump (15) not connected to a single rod hydraulic cylinder (3) is connected to the single rod hydraulic cylinder, and controls an opening area of a particular proportional valve (49) provided on a flow line that connects a delivery port of the particular open-circuit pump to a tank, when the single rod hydraulic cylinder and a hydraulic motor (7) are driven simultaneously.
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公开(公告)号：EP3779065A1
公开(公告)日：2021-02-17
申请号：EP19826997.9
申请日：2019-05-20
发明人： SHIMIZU Juri , HIRAKU Kenji , TAKAHASHI Hiromasa , SAITOU Teppei
IPC分类号： E02F9/22
摘要： An object of the present invention is to provide a construction machine that has a hydraulic closed-circuit system mounted therein and capable of selectively connecting some of a plurality of hydraulic pumps driven by two engines to any one of a plurality of hydraulic actuators and that can downsize the engines while maintaining high work efficiency. A controller 80 includes an actuator/engine allocation computing section F6 that, at the time of connecting closed-circuit pumps that are not connected to any of the hydraulic actuators 1, 3, 5, and 7 to any one of the hydraulic actuators, allocates closed-circuit pumps driven by a right engine 9b to the one hydraulic actuator in a case in which an estimated maximum load on a left engine 9a is heavier than an estimated maximum load on the right engine, and allocates closed-circuit pumps driven by the left engine to the one hydraulic actuator in a case in which the estimated maximum load on the right engine is heavier than the estimated maximum load on the left engine.
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公开(公告)号：EP3073125B1
公开(公告)日：2018-09-26
申请号：EP14864885.0
申请日：2014-11-07
发明人： TAKAHASHI Hiromasa
CPC分类号： E02F3/435 , E02F9/2207 , E02F9/2235 , E02F9/2289 , E02F9/2292 , E02F9/2296 , F15B11/17 , F15B2211/20561 , F15B2211/20569 , F15B2211/20576 , F15B2211/27 , F15B2211/30595 , F15B2211/71
摘要： Provided is a work machine driving device which can reduce unnecessary switching control of switching valves. The present invention is configured so that at least two closed-circuit hydraulic pumps 2a to 2f can be connected in a closed loop to any one of hydraulic actuators 7a to 7c, 10c through electromagnetic switching valves 12, in which a controller 16 includes a priority order calculating circuit 31 which calculates the allocation of the closed-circuit hydraulic pumps 2a to 2f to the hydraulic actuators 7a to 7c, 10c according to operation of operation levers 17a, 17b and a priority order map 32 determining priority connection relationships between the closed-circuit hydraulic pumps 2a to 2f and the hydraulic actuators 7a to 7c, 10c, and the priority order calculating circuit 31 selects and allocates an unallocated closed-circuit hydraulic pump 2a to 2f when the number of closed-circuit hydraulic pumps 2a to 2f to be allocated increases.
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