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：US11614105B2

公开(公告)日：2023-03-28

申请号：US17547054

申请日：2021-12-09

申请人： Liebherr-Aerospace Lindenberg GmbH

发明人： Tobias Roeben

IPC分类号： F15B19/00 ,  F15B11/08

摘要： The disclosure relates to a method of monitoring an electrohydrostatic actuator, wherein the electrohydrostatic actuator comprises a hydraulic pump drivable by an electric motor and a hydraulic activator drivable by means of the hydraulic pump to move a component, in particular an aircraft part. The method include detecting the instantaneous speed of the electric motor; detecting an instantaneous position of the activator; detecting a parameter that relates to an instantaneous operating point of the electrohydrostatic actuator; determining a state variable relating to an efficiency of the electrohydrostatic actuator on the basis of at least the detected speed and the detected position in dependence on the detected parameter; and determining a state of the electrohydrostatic actuator on the basis of the currently determined value.

公开(公告)号：US20230090110A1

公开(公告)日：2023-03-23

申请号：US17794488

申请日：2020-12-17

申请人： MITSUBISHI HEAVY INDUSTRIES, LTD. ,  NABTESCO CORPORATION

发明人： Motoyasu TAKEUCHI ,  Toshinori ABE ,  Kazuyuki SUZUKI ,  Hideki NIWA

IPC分类号： B64C13/50 ,  F15B11/08

摘要： An electro-hydraulic circuit includes a supply line that connects between a hydraulic supply device that supplies hydraulic fluid and a driving part to be driven by a hydraulic pressure of the hydraulic fluid; a switching valve disposed in the supply line to switch between switching lines for the hydraulic fluid supplied to the driving part; a pilot hydraulic line connected to the switching valve to supply the hydraulic fluid for switching between the switching lines; a check valve disposed in the pilot hydraulic line; a solenoid valve disposed in the pilot hydraulic line to change a supply state of the hydraulic fluid to the switching valve; a sealing material disposed in the switching valve to seal the hydraulic fluid; and a relief valve disposed in the pilot hydraulic line to release the pilot hydraulic pressure

公开(公告)号：US11608612B2

公开(公告)日：2023-03-21

申请号：US17760718

申请日：2020-09-02

申请人： DAIKIN INDUSTRIES, LTD.

发明人： Hirokazu Nakamura ,  Atsuhiro Kanbayashi ,  Hitoshi Segawa

IPC分类号： F15B19/00 ,  F15B20/00 ,  F15B11/08 ,  E02F9/22 ,  F15B1/26 ,  F15B13/04

摘要： A hydraulic unit includes a hydraulic circuit fluidly connected to a hydraulic actuator, and a control device to control the hydraulic circuit. The hydraulic circuit includes a hydraulic oil tank, a hydraulic pump that supplies the hydraulic oil to the hydraulic actuator from the hydraulic oil tank, a discharge flow path fluidly connecting a discharge side of the hydraulic pump to the hydraulic actuator, a valve that blocks a flow of the hydraulic oil in the discharge flow path, and a pressure sensor that detects a pressure of the hydraulic oil the discharge flow path. In a pressure holding state, when a rotational frequency of the hydraulic pump exceeds a predetermined first determination rotational frequency or when a discharge flow rate of the hydraulic pump exceeds a predetermined first determination discharge flow rate, the control device determines that the hydraulic circuit is abnormal.

公开(公告)号：US11497164B2

公开(公告)日：2022-11-15

申请号：US16660332

申请日：2019-10-22

申请人： CNH Industrial America LLC

发明人： Jethro Martin ,  Blaine R. Noll ,  Benjamin Kemmerer

IPC分类号： A01D41/06 ,  A01D41/14 ,  A01B63/00 ,  A01B63/10 ,  A01D75/28 ,  A01D41/127 ,  A01D41/12 ,  F15B11/08 ,  G05B15/02 ,  F15B21/00 ,  F15B21/08

摘要： An agricultural vehicle header suspension having a frame, a plurality of supports extending forward from the frame, an anchor plate, a frame pivot joining the frame to the anchor plate to be rotatable about a frame pivot axis, a frame actuator connected between the anchor plate and the frame and configured to resiliently hold the frame at a predetermined position relative to the anchor plate, and to allow the frame to move through a range of motion relative to the anchor plate, upon compression and/or extension of the frame actuator. The frame actuator may be, for example, at least one single-acting hydraulic actuator, mechanical spring, or a pneumatic cylinder.