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公开(公告)号：EP3943755B1
公开(公告)日：2024-09-04
申请号：EP20779689.7
申请日：2020-02-28
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公开(公告)号：EP2884010B1
公开(公告)日：2018-06-06
申请号：EP13825330.7
申请日：2013-06-19
发明人： TSURUGA Yasutaka , TAKAHASHI Kiwamu
CPC分类号： E02F9/2292 , E02F3/325 , E02F3/425 , E02F3/964 , E02F9/02 , E02F9/2239 , E02F9/2296 , F15B9/17 , F15B11/165 , F15B11/17 , F15B2211/20523 , F15B2211/2053 , F15B2211/20553 , F15B2211/20576 , F15B2211/2656 , F15B2211/30535 , F15B2211/30565 , F15B2211/50536 , F15B2211/6054 , F15B2211/7135 , F15B2211/7142
摘要： In a hydraulic drive system performing the load sensing control by using a pump device having two delivery ports whose delivery flow rates are controlled by a single pump controller, surplus flow is prevented and energy loss at an unload valve and a pressure compensating valve is reduced in combined operations in which two actuators are driven at the same time while producing a relatively large supply flow rate difference therebetween. A boom cylinder 3a is connected so that the hydraulic fluids delivered from delivery ports P1 and P2 of a pump device 1a are merged and supplied to the boom cylinder 3a. An arm cylinder 3h is connected so that the hydraulic fluids delivered from delivery ports P3 and P4 of a pump device 1b are merged and supplied to the arm cylinder 3h. A travel motor 3d is connected so that the hydraulic fluid delivered from one (delivery port P2) of the delivery ports of the pump device 1a and the hydraulic fluid delivered from one (delivery port P4) of the delivery ports of the pump device 1b are merged and supplied to the travel motor 3d. A travel motor 3e is connected so that the hydraulic fluid delivered from the other (delivery port P1) of the delivery ports of the pump device 1a and the hydraulic fluid delivered from the other (delivery port P3) of the delivery ports of the pump device 1b are merged and supplied to the travel motor 3e.
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公开(公告)号：EP2832932B1
公开(公告)日：2018-04-11
申请号：EP13767558.3
申请日：2013-02-12
发明人： HIROZAWA, Mitsunori , UEDA, Koji
CPC分类号： E02F9/2239 , E02F3/435 , E02F9/2066 , E02F9/2217 , E02F9/2246 , E02F9/2285 , E02F9/2292 , E02F9/2296 , F15B11/024 , F15B11/17 , F15B2211/20523 , F15B2211/20576 , F15B2211/3058 , F15B2211/30595 , F15B2211/41527 , F15B2211/41581 , F15B2211/6309 , F15B2211/6313 , F15B2211/6316 , F15B2211/6346 , F15B2211/665 , F15B2211/6651 , F15B2211/6652 , F15B2211/6654 , F15B2211/78 , F15B2211/88
摘要： A control device is configured to sufficiently reduce the drive loss of a hydraulic pump. The control device is provided with a controller (14) configured to control a regeneration valve (22) to switch to a regeneration state, and to control the flow rate of a second hydraulic pump (16) to reduce the ejection flow rate of the second hydraulic pump (16) in accordance with regeneration of hydraulic oil through the regeneration valve (22) when a combined operation of lowering a boom and pressing an arm is performed. The controller (14) outputs a command for setting the number of rotations of an engine (5) to be smaller than the rotation number designated by a rotation number designating unit (29) when the ejection flow rate of the second hydraulic pump (16) is not larger than a predetermined flow rate during the combined operation.
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公开(公告)号：EP2602491A4
公开(公告)日：2018-02-28
申请号：EP11814260
申请日：2011-07-28
发明人： SAOTOME YOSHIMI , OGUMA SHOTA
CPC分类号： E02F3/36 , E02F9/2239 , E02F9/2282 , E02F9/2285 , E02F9/2292 , F15B2211/20576 , F15B2211/3116
摘要： The present invention is directed to providing a construction machine capable of improving boom raising performance. The construction machine comprises: a lower propelling body (1); an upper slewing body (2); a working attachment (9) which includes a boom (3), an arm (4), a bucket (5), and three cylinders (6, 7, 8) for driving respective ones of the boom (3), arm (4) and bucket (5); two travel motors (10, 11); a slewing motor (12); a hydraulic actuator circuit; and first to third pumps (13 to 15). The hydraulic actuator circuit comprises: a first circuit (A) connected to one of the travel motors (10, 11) and the boom cylinder (6); a second circuit (B) connected to the other travel motor and the arm cylinder (7); and a third circuit (C) connected to the slewing motor (12), wherein the first to third circuits have a plurality of control valves (16 to 20) each associated with the hydraulic actuator. Each of the first to third pumps (13 to 15) discharges hydraulic fluid toward the respective first to third circuits (A to C). Each of the travel motors is disposed on an upstreammost side in the first and second circuits (A, B). The hydraulic actuator circuit includes a merging valve (22A), which has: a first position (P1) for unloading the hydraulic fluid discharged from the third pump (15) through the second circuit (B) when none of the hydraulic actuators other than the two travel motors (10, 11) is operated; a second position (P2) for merging hydraulic fluid discharged from the third pump (15) into each of the first and second circuits (A, B) when a simultaneous operation of the two travel motors (10, 11), and an operation of at least one of the remaining hydraulic actuators except for a boom raising operation which is an operation for raising the boom are performed; and a third position for merging hydraulic fluid discharged from the third pump (15) into the first circuit (A) while blocking the hydraulic fluid from the second circuit (B) when the boom raising operation is performed.
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公开(公告)号：EP3284953A1
公开(公告)日：2018-02-21
申请号：EP16779919.6
申请日：2016-03-30
申请人： KYB Corporation
发明人： ISOGAI, Hiroki
CPC分类号： E02F9/2228 , E02F9/22 , E02F9/2239 , E02F9/2267 , E02F9/2271 , E02F9/2292 , F15B11/00 , F15B11/17 , F15B2211/20576 , F15B2211/3116 , F15B2211/329 , F15B2211/50518 , F16K27/003 , F16K31/1221 , Y10T137/86163 , Y10T137/87877 , Y10T137/87885
摘要： A fluid pressure control device (100) includes a first circuit system (10) having a first pump (P1) and a first control valve (121-125). The first circuit system (10) includes an intermediate cut valve (40) provided downstream of the first control valve (121-125) in a first intermediate passage (11) and which connects and disconnects a connection between the first intermediate passage (11) and the tank T, and an external output port (64) communicating at a part downstream of the first control valve (121-125) in the first intermediate passage (11) and upstream of the intermediate cut valve (40), the external output port (64) being capable of externally supplying working fluid discharged from the first pump (P1).
摘要翻译： 流体压力控制装置（100）包括具有第一泵（P1）和第一控制阀（121-125）的第一回路系统（10）。 第一回路系统10在第一中间通路11中包括设置在第一控制阀121-125下游的中间截止阀40，并且将第一中间通路11与第二中间通路11之间的连接连接和断开。 和罐T以及在第一中间通路（11）的第一控制阀（121-125）的下游侧且中间截止阀（40）的上游侧连通的外部输出口（64），外部输出 （64）能够从外部供应从第一泵（P1）排出的工作流体。
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公开(公告)号：EP2977620B1
公开(公告)日：2018-01-17
申请号：EP14768311.4
申请日：2014-03-17
发明人： TAKAHASHI Kiwamu , TSURUGA Yasutaka , TAKEBAYASHI Yoshifumi , MORI Kazushige , NAKAMURA Natsuki
CPC分类号： F15B11/166 , E02F3/325 , E02F9/2239 , E02F9/2285 , E02F9/2292 , E02F9/2296 , F15B11/17 , F15B2211/20553 , F15B2211/20576 , F15B2211/253 , F15B2211/2656 , F15B2211/30535 , F15B2211/30595 , F15B2211/6658 , F15B2211/7135 , F15B2211/7142 , F15B2211/88
摘要： In addition to a main pump 102 having two delivery ports 102a and 102b and performing the load sensing control, two subsidiary pumps 202 and 302 for the load sensing control for respectively performing assist driving on a boom cylinder 3a and an arm cylinder 3b are provided. When driving the boom cylinder 3a or the arm cylinder 3b, a selector valve 141 or 241 is switched and flows of hydraulic fluid are merged together and supplied to the boom cylinder 3a or the arm cylinder 3b. When driving actuators other than the boom cylinder 3a or the arm cylinder 3b, only the hydraulic fluid from the main pump is supplied to the actuators. In short, the hydraulic drive system is configured so that two specific actuators having great demanded flow rates and tending to have a great load pressure difference between each other when driven at the same time can be driven with hydraulic fluid delivered from separate delivery ports. With this configuration, wasteful energy consumption due to pressure loss in a pressure compensating valve can be suppressed, and in cases of driving an actuator of a low demanded flow rate, the hydraulic pump can be used at a point where the volume efficiency is high.
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公开(公告)号：EP3225752A2
公开(公告)日：2017-10-04
申请号：EP16206929.8
申请日：2016-12-27
发明人： TANAKA, Yoshimitsu , BITO, Kunihiko , HARAGUCHI, Tsukasa , OTANI, Toshiaki , KAWANO, Yuji , KUMATANI, Masaru , MAEDA, Junki , KAWANO, Shoichi , IWAMURA, Hitoshi , KUNIZAWA, Teruo , WAKASUGI, Takehiro , MATSUURA, Akio
IPC分类号： E02F9/22
CPC分类号： F15B11/168 , E02F3/422 , E02F9/2221 , E02F9/2239 , E02F9/2246 , E02F9/2285 , E02F9/2289 , E02F9/2292 , E02F9/2296 , F15B1/26 , F15B11/10 , F15B21/044 , F15B2211/35 , F15B2211/55 , F15B2211/7052 , F15B2211/7058 , F15B2211/71 , F15B2211/78
摘要： A hydraulic system for a work machine includes a first switch valve and a first return circuit. The first switch valve has a confluent position to connect a first operation fluid tube to a second operation fluid tube and to connect a first transmission fluid tube to a second transmission fluid tube and an isolation position to release the connection between the first operation fluid tube and the second operation fluid tube and to release the connection between the first operation fluid tube and the second operation fluid tube, the first switch valve being configured to be switched to the confluent position and to the isolation position.
摘要翻译： 用于作业机械的液压系统包括第一转换阀和第一回路。 第一转换阀具有汇合位置以将第一操作流体管连接到第二操作流体管并且将第一变速器流体管连接到第二变速器流体管和隔离位置以释放第一操作流体管和 第二操作流体管并释放第一操作流体管和第二操作流体管之间的连接，第一开关阀构造成切换到汇合位置和隔离位置。
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8.发明公开DRIVING STRAIGHT AHEAD DEVICE FOR CONSTRUCTION MACHINE AND CONTROL METHOD THEREFOR 审中-公开驱动施工机械的前向装置及其控制方法
公开(公告)号：EP3216927A1
公开(公告)日：2017-09-13
申请号：EP14905308.4
申请日：2014-11-05
发明人： JOUNG, Hea-Gyoon , KIM, Sung-Gon
IPC分类号： E02F9/02
CPC分类号： E02F9/2004 , E02F9/02 , E02F9/2037 , E02F9/2045 , E02F9/2225 , E02F9/2239 , E02F9/2242 , E02F9/225 , E02F9/2285 , E02F9/2292 , E02F9/2296 , F15B11/17
摘要： Disclosed are a straight traveling apparatus for a construction machine and a control method thereof, which can allow a curved travel when the working device is operated during the curved travel. The straight traveling apparatus comprises a first and a second variable displacement hydraulic pump and a pilot pump; a left travel motor and a first working device that are operated by the first hydraulic pump; a plurality of switch valve that are installed in the path of the first hydraulic pump and control the hydraulic oil supplied to the left travel motor or the first working device; a right travel motor and a second working device that are operated by the second hydraulic pump; a plurality of switch valve that are installed in the path of the second hydraulic pump and control the hydraulic oil supplied to the right travel motor or the second working device; a straight travel valve that is switched by the pilot pressure applied from an electrical control valve, and supplies the hydraulic oil of one of the first and second hydraulic pumps to the left and right travel motors while supplying the hydraulic oil of the other of the first and second hydraulic pumps to the left and right working devices; a pressure detection sensor for detecting the pilot pressure applied to the left and right travel motor switch valves and the pilot pressure applied to the first and second working device switch valves; and a controller that outputs the control signal to the electrical control valve so that the pilot pressure applied to the straight travel valve is blocked in case that the difference between the pilot pressures applied to the left and right travel motor switch valves is larger than the pre-set pressure value, when the first and second working devices are operated during the travel.
摘要翻译： 公开了一种用于施工机械的直行装置及其控制方法，其能够在弯曲行驶期间操作作业装置时允许弯曲行进。 直行装置包括第一和第二可变排量液压泵以及先导泵; 由第一液压泵操作的左行走马达和第一作业装置; 多个开关阀，所述开关阀安装在所述第一液压泵的路径中并且控制供应到所述左行驶马达或所述第一作业装置的液压油; 由第二液压泵操作的右行走马达和第二工作装置; 多个开关阀，其安装在第二液压泵的路径中并且控制供应到右行进马达或第二工作装置的液压油; 直行阀，其通过从电动控制阀施加的先导压力进行切换，并且将第一和第二液压泵中的一个的液压油供应到左和右行走马达，同时供应第一和第二液压泵中的另一个的液压油 第二液压泵连接到左和右工作装置; 压力检测传感器，用于检测施加到左右行驶马达转换阀的先导压力和施加到第一和第二作业装置转换阀的先导压力; 以及控制器，该控制器将控制信号输出到电控阀，以使得施加到直行阀的先导压力在施加到左行进马达切换阀和右行进马达切换阀的先导压力之间的差大于预先设定的阈值 - 当在行驶期间操作第一和第二工作装置时设定的压力值。
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9.发明公开HYDRAULIC PRESSURE CONTROL DEVICE FOR CONSTRUCTION MACHINE 审中-公开HYDRAULISCHE DRUCKSTEUERUNGSVORRICHTUNGFÜREINE BAUMASCHINE
公开(公告)号：EP3101282A4
公开(公告)日：2017-09-13
申请号：EP14908395
申请日：2014-12-16
申请人： KYB CORP
发明人： FUKUDA SHUNSUKE , YOSHIDA NOBUYOSHI
CPC分类号： F15B11/17 , E02F9/2228 , E02F9/2239 , E02F9/2253 , E02F9/2267 , E02F9/2282 , E02F9/2285 , E02F9/2292 , F15B11/02 , F16K11/0716 , F16K15/02 , F16K31/1221
摘要： A fluid pressure control device (100) for a construction machine includes a first circuit system (10) connected to the first pump (P1); a second circuit system (20) connected to the second pump (P2); a switching valve (25) having a normal position (A), a straight traveling position (B) and a merging position (C) where the working fluid of the branch section (13a) is merged into the second neutral passage (21); and an open/close mechanism (14) configured to open/close the first neutral passage (11). In a case where at least one of the control valves (222, 223, 224), on which merging is required, on the downstream of the second traveling control valve (221) is switched to a position other than the neutral position, by closing the first neutral passage (11) by the open/close mechanism (14) and switching the switching valve (25) to the merging position (C), the working fluid of the first pump (P1) is merged into the working fluid of the second pump (P2).
摘要翻译： 一种用于施工机械的流体压力控制装置（100）包括连接到第一泵（P1）的第一回路系统（10） 连接到第二泵（P2）的第二回路系统（20）; （A），直行位置（B）和合流位置（C）的切换阀（25），其中分支部分（13a）的工作流体合并到第二中性通道（21）中; 以及打开/关闭第一中性通道（11）的打开/关闭机构（14）。 在第二行驶控制阀（221）的下游侧需要合流的控制阀（222,223,224）中的至少一个被切换到中立位置以外的位置的情况下，通过关闭 通过开闭机构14将第一中立通路11切换成合流位置C，第一泵P1的工作流体合流到第一中立通路11的工作流体中， 第二泵（P2）。
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公开(公告)号：EP3165683A1
公开(公告)日：2017-05-10
申请号：EP15814280.2
申请日：2015-07-01
发明人： KAWASHIMA, Koji
CPC分类号： E02F9/2285 , E02F3/32 , E02F9/123 , E02F9/22 , E02F9/2207 , E02F9/2228 , E02F9/2239 , E02F9/2292 , F15B11/08 , F15B13/0401 , F15B13/042 , F15B2211/40515 , F15B2211/575 , F15B2211/7058
摘要： A turning body (3) of a shovel is driven to turn by a turning hydraulic motor (21B) driven with hydraulic oil supplied from a hydraulic pump (14). A hydraulic cylinder (7) is driven with the hydraulic oil supplied from the hydraulic pump (14). A pilot circuit controls a pilot pressure in accordance with the operation of an operation lever. A hydraulic control valve (17) controls the hydraulic oil supplied from the hydraulic pump (14) to the hydraulic cylinder (7) in accordance with the pilot pressure. A variable throttle (64) whose opening varies in accordance with the operating state of the operation lever (26A) is provided in the pilot circuit.
摘要翻译： 挖土机的旋转体（3）被从液压泵（14）供给的工作油驱动的旋转液压马达（21B）驱动而旋转。 利用从液压泵（14）供应的液压油驱动液压缸（7）。 先导回路根据操作杆的操作来控制先导压力。 液压控制阀（17）根据先导压力控制从液压泵（14）供应到液压缸（7）的液压油。 在先导回路中设置有开度根据操作杆（26A）的操作状态而变化的可变节流阀（64）。
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