公开(公告)号：US20240301651A1

公开(公告)日：2024-09-12

申请号：US18119573

申请日：2023-03-09

申请人： KUBOTA CORPORATION

发明人： Kohei NAGAO ,  Yuji FUKUDA

IPC分类号： E02F3/42 ,  E02F3/34 ,  E02F3/43 ,  E02F9/20 ,  E02F9/22 ,  E02F9/26 ,  F15B11/08 ,  F15B15/20 ,  F15B19/00

CPC分类号： E02F3/422 ,  E02F3/3414 ,  E02F3/431 ,  E02F9/2004 ,  E02F9/2203 ,  E02F9/262 ,  F15B11/08 ,  F15B15/20 ,  F15B19/00 ,  E02F3/96 ,  E02F9/2285 ,  E02F9/2292 ,  E02F9/2296

摘要： A working machine includes: at least one support member connectable to a work attachment to do work by making contact with an object to be contacted; at least one hydraulic cylinder to move the work attachment connected to the at least one support member, a rod-side pressure detector to detect a rod-side hydraulic pressure of hydraulic fluid in communication with a rod-side fluid chamber of the at least one hydraulic cylinder; a bottom-side pressure detector to detect a bottom-side hydraulic pressure of hydraulic fluid in communication with a bottom-side fluid chamber of the at least one hydraulic cylinder; and a controller to calculate a relationship in pressure between the rod-side hydraulic pressure and the bottom-side hydraulic pressure and evaluate, based on the calculated relationship in pressure, a contact state which is a state of contact of the work attachment with the object.

公开(公告)号：US20240276916A1

公开(公告)日：2024-08-22

申请号：US18111272

申请日：2023-02-17

申请人： DRAGONE S.R.L.

发明人： Claudio RAPALINO ,  Marco PONZO ,  Marco CHIALE ,  Simone BARBERO

IPC分类号： A01D43/00 ,  A01D69/03 ,  F15B11/08 ,  F15B13/044

CPC分类号： A01D43/00 ,  A01D69/03 ,  F15B11/08 ,  F15B13/044 ,  A01D2101/00 ,  F15B2211/55

摘要： A vegetation management machine for clearing the ground along a fence or a row has a connecting device, which is configured to connect a vehicle to move the machine forward along a given path and which has a coupling to mechanically connect the connecting device to the vehicle; a support structure selectively connectable to a mulcher; and an articulated arm extending from the support structure to support a mechanical weeding device independently of the mulcher and to allow the mechanical weeding device to be moved between a position wherein it falls within the mulcher bulk and a position wherein it protrudes from the mulcher in relation to the forward direction.

公开(公告)号：US12018705B2

公开(公告)日：2024-06-25

申请号：US17518841

申请日：2021-11-04

申请人： Deere & Company

发明人： Alex Brimeyer ,  David E. Renner ,  Michael L. Vandeven ,  Joshua R. Pierson ,  Todd M. Verhoef

IPC分类号： F15B13/02 ,  A01B63/00 ,  A01B63/108 ,  F15B1/26 ,  A01B63/10 ,  A01D41/127 ,  A01D41/14 ,  F15B1/02 ,  F15B11/08 ,  F15B13/04 ,  F15B13/044

CPC分类号： F15B13/021 ,  A01B63/008 ,  A01B63/108 ,  F15B1/26 ,  A01B63/10 ,  A01D41/127 ,  A01D41/141 ,  A01D41/145 ,  F15B1/02 ,  F15B11/08 ,  F15B13/0401 ,  F15B13/044 ,  F15B2211/30565 ,  F15B2211/3058 ,  F15B2211/3127 ,  F15B2211/426 ,  F15B2211/526 ,  F15B2211/625 ,  F15B2211/7053 ,  F15B2211/75 ,  F15B2211/76

摘要： A header assembly for an agricultural harvesting machine comprises a first frame assembly, a second frame assembly that supports a cutter, and is movable relative to the first frame assembly, a float cylinder coupled between the first frame assembly and the second frame assembly, an accumulator, a controllable reservoir, and fluidic circuitry. The fluidic circuitry comprises a first conduit forming a first fluid path that provides a flow of pressurized fluid under pressure to the float cylinder, so the float cylinder exerts a float force on the second frame assembly, a valve mechanism that is actuatable to inhibit fluid flow along the first fluid path between the accumulator and the float cylinder, a second conduit forming a second fluid path fluidically coupled to the controllable reservoir, the controllable reservoir being controllable to add fluid to the float cylinder.

公开(公告)号：US11815109B2

公开(公告)日：2023-11-14

申请号：US17755362

申请日：2020-09-30

申请人： KAWASAKI JUKOGYO KABUSHIKI KAISHA

发明人： Tomomichi Nose ,  Hayato Kawasaki ,  Hideyasu Muraoka ,  Nobuyuki Kinoshita

IPC分类号： F15B21/14 ,  F15B11/024 ,  E02F9/22 ,  F15B11/08

CPC分类号： F15B21/14 ,  E02F9/2217 ,  F15B11/024 ,  F15B11/08 ,  F15B2011/0246 ,  F15B2211/3058 ,  F15B2211/6313

摘要： A regeneration device includes: a regeneration valve that controls the flow rate of an operating fluid being drained from one port of a cylinder; a non-return valve that allows a regenerative flow of the operating fluid from the regeneration valve to the other port of the cylinder and blocks an opposite flow of the operating fluid; and an exhaust valve that controls the flow rate of the operating fluid output from the regeneration valve being drained to a tank. The regeneration valve controls the flow rate independently of the exhaust valve.

公开(公告)号：US11781288B2

公开(公告)日：2023-10-10

申请号：US17649816

申请日：2022-02-03

申请人： SUMITOMO CONSTRUCTION MACHINERY CO., LTD.

发明人： Riichi Nishikawara

IPC分类号： E02F9/22 ,  F15B11/08

CPC分类号： E02F9/2282 ,  E02F9/2292 ,  E02F9/2296 ,  F15B11/08

摘要： A shovel includes a lower traveling structure, an upper swing structure mounted on the lower traveling structure, an engine mounted on the upper swing structure, a hydraulic pump configured to be driven by the engine, a hydraulic actuator, an operating device configured to operate the hydraulic actuator, and a hardware processor configured to control the discharge quantity of the hydraulic pump through negative control and change a control characteristic of the negative control according to the details of an operation on the operating device.

公开(公告)号：US11761175B2

公开(公告)日：2023-09-19

申请号：US17637719

申请日：2020-07-31

申请人： KAWASAKI JUKOGYO KABUSHIKI KAISHA

发明人： Akihiro Kondo ,  Naoki Hata ,  Nobuyuki Kinoshita

IPC分类号： E02F9/22 ,  F15B11/08 ,  F15B11/16 ,  F15B13/06 ,  E02F9/12 ,  F15B13/043

CPC分类号： E02F9/2267 ,  E02F9/128 ,  E02F9/2285 ,  F15B11/08 ,  F15B11/16 ,  F15B13/0433 ,  F15B13/06 ,  F15B2211/7058 ,  F15B2211/715

摘要： A hydraulic system includes: a slewing motor; a mechanical brake; and a slewing control valve interposed between a main pump and the slewing motor. A first pilot port of the slewing control valve is connected to a first solenoid proportional valve by a pilot line. A second pilot port of the slewing control valve is connected to a second solenoid proportional valve by a second pilot line. The first solenoid proportional valve and the second solenoid proportional valve are connected to an auxiliary pump by a primary pressure line. A switching valve is interposed between the auxiliary pump and the mechanical brake. The switching valve includes a pilot port that is connected to the first pilot line by a switching pilot line. The valve switches from a closed to an open position when a pilot pressure led to the pilot port becomes higher than or equal to a setting value.

公开(公告)号：US20180319634A1

公开(公告)日：2018-11-08

申请号：US15522105

申请日：2015-10-30

申请人： XUZHOU HEAVY MACHINERY CO., LTD.

发明人： Zenghai Shan ,  Xiaodong Hu ,  Guowang Jiao ,  Bin Zhou ,  Conglin Yuan

IPC分类号： B66C13/20 ,  B66D1/08 ,  F15B11/08 ,  F15B13/16 ,  F15B13/04

CPC分类号： B66C13/20 ,  B66D1/08 ,  F15B11/08 ,  F15B13/0417 ,  F15B13/16

摘要： The present application relates to a crane hydraulic system and a controlling method of the system, wherein the crane hydraulic system includes a load sensing subsystem, and the subsystem includes a variable pump, a variable pump oil inlet line, a load feedback line, an oil return line and a pressure compensator; the pressure compensator is provided with an oil inlet, an oil outlet, a first control oil port, a second control oil port and a control spring; the oil inlet communicates with the variable pump oil inlet line, the oil outlet communicates with the oil return line, the first control oil port communicates with the load feedback line, and the second control oil port also communicates with the variable pump oil inlet line; and wherein the control spring and the first control oil port are located on the same end of the pressure compensator, and a set pressure of the control spring is greater than a pressure difference of the variable pump. According to the present application, since the load sensing subsystem is arranged, at the start and stop moments of a winch system, the pressure compensator can be opened, and the variable pump oil inlet line communicates with the oil return line to realize pressure relief, so as to reduce the pressure impact.

公开(公告)号：US20180244150A1

公开(公告)日：2018-08-30

申请号：US15443725

申请日：2017-02-27

申请人： Deere & Company

发明人： Randall L. Long ,  G. William Detrick

IPC分类号： B60K17/28 ,  B60K6/00 ,  F16H7/02 ,  F15B11/08

CPC分类号： B60K17/28 ,  A01D46/08 ,  B60K6/00 ,  B60K17/105 ,  B60K17/34 ,  B60K17/356 ,  F15B11/08 ,  F15B2211/20576 ,  F16H7/02

摘要： An auxiliary drive assembly includes a mounting structure configured to mount a first hydraulic drive component in a fixed position with respect to a second hydraulic drive component along a drive axis. A first shaft coupled to the first hydraulic drive component is configured to rotate with respect to the drive axis. A second shaft coupled to the second hydraulic drive component is configured to rotate with respect to the drive axis. A power takeoff device is arranged along the drive axis between the first and second hydraulic drive components and coupled to the first and second shafts for co-rotation with respect to the drive axis. The power takeoff device is configured to transfer rotational power from the power source as received from the first hydraulic drive component to an auxiliary component of the work vehicle.

公开(公告)号：US10000906B2

公开(公告)日：2018-06-19

申请号：US14697713

申请日：2015-04-28

申请人： SUMITOMO HEAVY INDUSTRIES, LTD.

发明人： Chunnan Wu

IPC分类号： E02F9/12 ,  F15B21/14 ,  E02F9/22 ,  F15B1/027 ,  F15B11/08

CPC分类号： E02F9/123 ,  E02F9/2217 ,  E02F9/2267 ,  F15B1/027 ,  F15B11/08 ,  F15B21/14 ,  F15B2201/40 ,  F15B2201/411 ,  F15B2211/205 ,  F15B2211/212 ,  F15B2211/25 ,  F15B2211/255 ,  F15B2211/265 ,  F15B2211/40584 ,  F15B2211/625 ,  F15B2211/6309 ,  F15B2211/6313 ,  F15B2211/7058 ,  F15B2211/715

摘要： A shovel may be provided with a swing hydraulic motor, a relief valve provided on the swing hydraulic motor, and an accumulator part that supplies to the swing hydraulic motor a working oil having a pressure lower than a relief pressure of the relief valve. The accumulator part may accumulate the working oil on a braking side of the swing hydraulic motor. The accumulator part may discharge the working oil to an upstream of a main pump.

公开(公告)号：US20180135764A1

公开(公告)日：2018-05-17

申请号：US15577847

申请日：2016-02-25

申请人： Hitachi Construction Machinery Co., Ltd.

发明人： Juri SHIMIZU ,  Teppei SAITOH ,  Kenji HIRAKU ,  Yuki AKIYAMA ,  Hiromasa TAKAHASHI

IPC分类号： F16K11/07 ,  F16H61/4104 ,  F15B11/08

CPC分类号： F16K11/07 ,  E02F9/2289 ,  F15B11/08 ,  F16H61/4104

摘要： A work machine includes a closed circuit system in which there is provided a flushing valve. The flushing valve is equipped with: a valve main body; a spool which can select, in accordance with a position where the spool is arranged in the valve main body, connection between a first flow line and a third flow line, connection between a second flow line and the third flow line, or interruption of the connection between the first flow line, the second flow line, and the third flow line; a first liquid chamber that is provided inside the valve main body and into which a hydraulic working fluid from the first flow line flows; a first piston pressurizing the hydraulic working fluid having flowed into the first liquid chamber and moving the spool to a position where the second flow line and the third flow line are connected together, by the hydraulic pressure of the first liquid chamber; a second liquid chamber that is provided inside the valve main body and into which the hydraulic working fluid from the second flow line flows; and a second piston pressurizing the hydraulic working fluid having flowed into the second liquid chamber and moving the spool to a position where the first flow line and the third flow line are connected together, by the hydraulic pressure of the second liquid chamber.