公开(公告)号：US20240254729A1

公开(公告)日：2024-08-01

申请号：US18632668

申请日：2024-04-11

申请人： SUMITOMO CONSTRUCTION MACHINERY CO., LTD.

发明人： Riichi NISHIKAWARA

IPC分类号： E02F9/22

CPC分类号： E02F9/2292 ,  E02F9/2282 ,  E02F9/2285

摘要： An excavator includes an excavation attachment including a boom, an arm, and a bucket, a left main pump and a right main pump mounted on an upper rotating body, a control valve serving as a confluence valve that merges an operating oil discharged from the left main pump and the operating oil discharged from the right main pump with each other, and a controller that can control functioning of the control valve. The controller moves the control valve to merge the operating oil discharged from the left main pump and the operating oil discharged from the right main pump with each other while the boom, the arm, and the bucket are moving simultaneously.

公开(公告)号：US11873894B2

公开(公告)日：2024-01-16

申请号：US17397168

申请日：2021-08-09

申请人： KUBOTA CORPORATION

发明人： Yuji Fukuda ,  Jun Tomita ,  Yuya Konishi ,  Fumitaka Fujisawa ,  Daiki Abe ,  Kohei Kurachi ,  Yudai Koga ,  Yuya Tanabe

IPC分类号： F16H61/47 ,  F16H61/431 ,  E02F9/22 ,  F15B11/17 ,  F16H61/456 ,  F16H61/438 ,  E02F3/34

CPC分类号： F16H61/47 ,  E02F9/2235 ,  E02F9/2253 ,  E02F9/2282 ,  E02F9/2285 ,  E02F9/2289 ,  E02F9/2292 ,  E02F9/2296 ,  F15B11/17 ,  F16H61/431 ,  B60Y2400/85 ,  E02F3/3414 ,  E02F9/2228 ,  F15B2211/20576 ,  F15B2211/6355 ,  F15B2211/7135 ,  F16H61/438 ,  F16H61/456

摘要： A working machine includes a first traveling fluid passage connected to a first pressure-receiving portion, a second traveling fluid passage connected to a second pressure-receiving portion, a third traveling fluid passage connected to a third pressure-receiving portion, a fourth traveling fluid passage fluidly connected to a fourth pressure-receiving portion, and a connection fluid passage connecting at least two of the first, second, third and fourth pressure-receiving portions to each other. When a traveling operation member is operated, operation fluid flows to the first pressure receiving portion through the first traveling fluid passage, to the second pressure receiving portion through the second traveling fluid passage, to the third pressure receiving portion through the third traveling fluid passage, and to the fourth pressure receiving portion through the fourth traveling fluid passage.

公开(公告)号：US20230167622A1

公开(公告)日：2023-06-01

申请号：US17910953

申请日：2021-03-31

申请人： Hitachi Construction Machinery Co., Ltd.

发明人： Kento KUMAGAI ,  Shinya IMURA ,  Yasutaka TSURUGA ,  Takaaki CHIBA ,  Hiroaki AMANO ,  Shinji NISHIKAWA ,  Akihiro NARAZAKI ,  Genroku SUGIYAMA ,  Shinjiro YAMAMOTO

IPC分类号： E02F3/43 ,  E02F9/22 ,  F15B11/024 ,  F15B11/042 ,  F15B11/044 ,  F15B11/08 ,  F15B11/16

CPC分类号： E02F3/435 ,  E02F9/2203 ,  E02F9/2217 ,  E02F9/2235 ,  E02F9/2242 ,  E02F9/2282 ,  E02F9/2292 ,  E02F9/2296 ,  F15B11/08 ,  F15B11/16 ,  F15B11/024 ,  F15B11/042 ,  F15B11/044 ,  F15B2211/46 ,  F15B2211/327 ,  F15B2211/329 ,  F15B2211/426 ,  F15B2211/455 ,  F15B2211/3058 ,  F15B2211/3116 ,  F15B2211/6306 ,  F15B2211/6309 ,  F15B2211/6336 ,  F15B2211/6346 ,  F15B2211/6355 ,  F15B2211/6652 ,  F15B2211/6654 ,  F15B2211/20553 ,  F15B2211/20576 ,  F15B2211/30505 ,  F15B2211/30595

摘要： An object of the present invention is to provide a work machine that can increase the operation speed of an actuator by a regenerating function while ensuring accuracy of position control of the actuator. For this purpose, a controller computes a target actuator supply flow rate by subtracting a regeneration flow rate from a target actuator flow rate, computes a target flow control valve opening amount on the basis of the target actuator supply flow rate, computes a target pump flow rate equal to or more than the sum of a plurality of the target actuator supply flow rates, controls flow control valves according to the target flow control valve opening amount, and controls a hydraulic pump according to the target pump flow rate.

公开(公告)号：US11655613B2

公开(公告)日：2023-05-23

申请号：US17637764

申请日：2020-07-31

申请人： KAWASAKI JUKOGYO KABUSHIKI KAISHA

发明人： Akihiro Kondo ,  Hideyasu Muraoka ,  Yoshiyuki Tode

IPC分类号： E02F9/22 ,  F15B11/16

CPC分类号： E02F9/2228 ,  E02F9/2282 ,  E02F9/2285 ,  F15B11/166

摘要： A hydraulic system of a construction machine includes: control valves interposed between a main pump and hydraulic actuators; and first solenoid proportional valves connected to pilot ports of the control valves. The hydraulic system further includes: a relief valve for the main pump, the relief valve including a pilot port; and a second solenoid proportional valve connected to the pilot port of the relief valve by a secondary pressure line and connected to an auxiliary pump by a primary pressure line. A switching valve including a pilot port connected to the secondary pressure line by a pilot line is interposed between the auxiliary pump and the first solenoid proportional valves.

公开(公告)号：US20190249390A1

公开(公告)日：2019-08-15

申请号：US16393966

申请日：2019-04-25

申请人： KUBOTA CORPORATION

发明人： Jun TOMITA ,  Yuji FUKUDA ,  Yuya KONISHI

IPC分类号： E02F3/42 ,  E02F9/22 ,  F15B1/02 ,  E02F3/43

CPC分类号： E02F3/422 ,  E02F3/3414 ,  E02F3/432 ,  E02F9/2203 ,  E02F9/2217 ,  E02F9/2267 ,  E02F9/2282 ,  F15B1/021 ,  F15B2211/30565 ,  F15B2211/3059 ,  F15B2211/30595 ,  F15B2211/625 ,  F15B2211/6658 ,  F15B2211/71

摘要： A hydraulic system for a work machine includes a first control cylinder to move a boom and a second control cylinder to move a bucket. A body of the first control cylinder has a first fluid chamber and a second fluid chamber. A first control valve is connected to the first fluid chamber via a first fluid path and connected to the second fluid chamber via a second fluid path to control the first hydraulic cylinder. A bucket positioning valve is connected to the second fluid path and a third fluid path to control a second hydraulic cylinder so as to rotate the bucket. A discharge fluid path is connected to the second fluid path between the bucket positioning valve and the first control valve. A discharge control valve is provided in the discharge fluid path to be opened and closed.

公开(公告)号：US20190127957A1

公开(公告)日：2019-05-02

申请号：US16143667

申请日：2018-09-27

申请人： KOBELCO CONSTRUCTION MACHINERY CO., LTD.

发明人： Kazuomi ENDO

IPC分类号： E02F9/22 ,  E02F9/26 ,  E02F9/20 ,  E02F3/43

CPC分类号： E02F9/2235 ,  E02F3/43 ,  E02F3/963 ,  E02F9/0858 ,  E02F9/2025 ,  E02F9/2029 ,  E02F9/2037 ,  E02F9/2282 ,  E02F9/264 ,  E02F9/265 ,  G07C5/008

摘要： Provided is a working machine having an expanded range of a working device posture which permits information on an attachment of the working device to be transmitted from the attachment to a machine body through wireless communication. The working machine includes: a transmitter disposed in the attachment so as to be displaced together with the attachment relatively to the machine body and configured to send an information signal containing information on the attachment; a receiver disposed in the machine body and configured to receive the information signal; a controller which acquires information on the attachment based on the information signal received by the receiver; and a relay device disposed in the working device main body to receive the information signal sent by the transmitter and transmit the information signal to a position at which the information signal can be received by the receiver.

公开(公告)号：US10072679B2

公开(公告)日：2018-09-11

申请号：US14961393

申请日：2015-12-07

申请人： HUSCO INTERNATIONAL, INC.

发明人： Eric P Hamkins ,  Jacob Ballweg ,  Joseph Pfaff ,  Mark Elton

IPC分类号： F15B11/024 ,  E02F9/22

CPC分类号： F15B11/024 ,  E02F9/2217 ,  E02F9/2282 ,  F15B2211/3059 ,  F15B2211/3133 ,  F15B2211/329 ,  F15B2211/355 ,  F15B2211/665 ,  F15B2211/6658 ,  F15B2211/7053 ,  F15B2211/71 ,  F15B2211/761

摘要： A hydraulic system and method for using the same are provided. The hydraulic system includes a pump, a first actuator having a first head chamber and a first rod chamber, and a second actuator having a second head chamber and a second rod chamber. The hydraulic system further includes a first control valve and a second control valve. The second control valve to selectively provide regeneration fluid flow from the first rod chamber to the first head chamber in response to a first function command is less than a first function command limit, a second function command is greater than a second function command limit, and a second function load is greater than a second function load limit.

公开(公告)号：US10072395B2

公开(公告)日：2018-09-11

申请号：US14662435

申请日：2015-03-19

申请人： SUMITOMO(S.H.I.) CONSTRUCTION MACHINERY CO., LTD.

发明人： Hiroyuki Tsukamoto

IPC分类号： E02F9/12 ,  E02F9/20 ,  E02F9/22 ,  E02F9/26 ,  F16P3/14 ,  E02F3/43

CPC分类号： E02F9/2033 ,  E02F3/435 ,  E02F9/123 ,  E02F9/128 ,  E02F9/2282 ,  E02F9/2285 ,  E02F9/2292 ,  E02F9/2296 ,  E02F9/262 ,  F16P3/141 ,  F16P3/142 ,  F16P3/147

摘要： A shovel includes a lower running body and an upper turning body that is turnably provided on the lower running body. An engine is mounted on the upper turning body. A hydraulic pump is driven by the engine to discharge an operating oil. A hydraulic actuator is mounted on the upper turning body. A control device controls operations of the shovel. An entering object detection device detects a position of an entering object in a monitoring area of said shovel and outputs a detection signal indicating the detection position of said entering object. The control device supplies, after a determination of an entry of the entering object into the monitoring area, the operating oil from the hydraulic pump to the hydraulic actuator.

公开(公告)号：US09963856B2

公开(公告)日：2018-05-08

申请号：US15038179

申请日：2014-12-02

申请人： Hitachi Construction Machinery Tierra Co., Ltd.

发明人： Kiwamu Takahashi ,  Kazushige Mori ,  Yoshifumi Takebayashi ,  Natsuki Nakamura

IPC分类号： F16D31/02 ,  E02F9/22 ,  F15B11/16 ,  F15B11/17 ,  E02F3/42 ,  F15B13/06 ,  E02F3/32 ,  E02F3/96

CPC分类号： E02F9/2271 ,  E02F3/325 ,  E02F3/425 ,  E02F3/964 ,  E02F9/2235 ,  E02F9/2239 ,  E02F9/2267 ,  E02F9/2282 ,  E02F9/2285 ,  E02F9/2292 ,  E02F9/2296 ,  F15B11/163 ,  F15B11/165 ,  F15B11/17 ,  F15B13/06 ,  F15B2211/20546 ,  F15B2211/20576 ,  F15B2211/255 ,  F15B2211/30565 ,  F15B2211/3111 ,  F15B2211/3116

摘要： An object to achieve favorable operability, in a combined operation that involves a specific actuator and involves a great difference in load pressure and when an operation of an operating unit for the specific actuator is a fine operation, by reducing energy consumption arising from wasted restricting pressure loss of a pressure compensating valve and by flexibly varying a flow rate of a hydraulic fluid supplied to the specific actuator depending on the load pressure. To achieve this object, a boom cylinder (3a) is provided with an open center type flow control valve (6a) that controls a hydraulic fluid from a main pump (202) and a closed center type flow control valve (6i) that controls a hydraulic fluid from a main pump (102). The main pump (102) is subject to load sensing control. The flow control valve (6a) is opened to control a supply flow rate up to an intermediate zone of an operating range of an operating unit for the boom cylinder (3a). Both the flow control valves (6a) and (6i) are opened to control the supply flow rate after the intermediate zone.

公开(公告)号：US09932994B2

公开(公告)日：2018-04-03

申请号：US14538920

申请日：2014-11-12

申请人： SUMITOMO(S.H.I.) CONSTRUCTION MACHINERY CO., LTD.

发明人： Hirofumi Hashimoto

IPC分类号： F16K31/00 ,  F15B11/10 ,  F15B13/04 ,  E02F9/22 ,  F15B11/16

CPC分类号： F15B11/10 ,  E02F9/2242 ,  E02F9/2267 ,  E02F9/2282 ,  E02F9/2285 ,  E02F9/2292 ,  E02F9/2296 ,  F15B11/162 ,  F15B13/0402 ,  F15B2211/20576 ,  F15B2211/3052 ,  F15B2211/30525 ,  F15B2211/3056 ,  F15B2211/30565 ,  F15B2211/3116 ,  F15B2211/31576 ,  F15B2211/31582 ,  F15B2211/35 ,  F15B2211/40507 ,  F15B2211/41509 ,  F15B2211/41554 ,  F15B2211/45 ,  F15B2211/7135 ,  F15B2211/7142 ,  F15B2211/78 ,  F15B2211/781

摘要： A hydraulic circuit for a construction machine including a direction control valve group including direction control valves provided in tandem to a center bypass passage, a bleed-off valve provided to the center bypass passage downstream of the direction control valve group, and a control valve controlling an amount of pressure oil to be supplied to the direction control valve.