公开(公告)号：US20190186105A1

公开(公告)日：2019-06-20

申请号：US16328054

申请日：2017-05-09

申请人： Hitachi Construction Machinery Co., Ltd.

发明人： Shinya IMURA ,  Hiroaki AMANO ,  Shinji NISHIKAWA ,  Masafumi HITA

IPC分类号： E02F9/22 ,  E02F3/32 ,  E02F9/20 ,  E02F3/42 ,  E02F3/43 ,  F15B11/16

CPC分类号： E02F9/2228 ,  E02F3/32 ,  E02F3/425 ,  E02F3/435 ,  E02F9/2004 ,  E02F9/22 ,  E02F9/2267 ,  E02F9/2271 ,  E02F9/2285 ,  E02F9/2296 ,  F15B11/16 ,  F15B2211/20523 ,  F15B2211/351 ,  F15B2211/353 ,  F15B2211/6346 ,  F15B2211/7053 ,  F15B2211/71 ,  F15B2211/78

摘要： A work machine includes directional control valves 43 and 44 each controlling a direction and a flow rate of a pressurized fluid supplied to each a boom cylinder 32 and a bucket cylinder 36; operation amount sensors 51a, 52a, and 52b detecting operation amounts of operation devices 51 and 52; a variable flow control valve 45 that can restrict the flow rate of the pressurized fluid in a meter-in passage of the directional control valve 44 related to the bucket cylinder 36; and a controller 60 controlling the variable flow control valve on the basis of the detection results by the operation amounts from the operation amount sensors, and the controller changes over an action mode to any one of a normal mode for restricting the flow rate of the pressurized fluid by the variable flow control valve and a responsiveness priority mode for not restricting the flow rate of the pressurized fluid by the variable flow control valve in response to the detection results of the operation amounts of the plurality of operation devices. It is thereby possible to enhance responsiveness in an action that requires responsiveness such as an action in which an operation amount of an operation lever frequently changes in a short period of time and to suppress a decline in work efficiency.

公开(公告)号：US20190032682A1

公开(公告)日：2019-01-31

申请号：US16075558

申请日：2017-03-28

申请人： Parker-Hannifin Corporation

发明人： Jarmo Antero Harsia ,  Germano Franzoni

IPC分类号： F15B13/04 ,  F15B13/042 ,  F16K11/07

CPC分类号： F15B13/0403 ,  F15B13/042 ,  F15B2211/3144 ,  F15B2211/31576 ,  F15B2211/351 ,  F15B2211/353 ,  F16K11/0716

摘要： A valve member having a supply pressure and a method of controlling the supply pressure in the valve member includes a valve body having a fluid inlet, a fluid outlet, and a controlled port. The valve member includes a spool moveable within the valve body to fluidly connect at least one of the fluid inlet and the fluid outlet with the controlled port. The spool includes an end in fluid communication with a control pressure port and a pin received within the end of the spool that is moveable relative to the spool. Fluid flow through the control pressure port acts against a cross-sectional area of the pin and an annular area of the spool to modulate the supply pressure through the valve member.

公开(公告)号：US09957982B2

公开(公告)日：2018-05-01

申请号：US14436263

申请日：2012-10-18

申请人： KABUSHIKI KAISHA TOYOTA JIDOSHOKKI

发明人： Yuki Ueda ,  Tsutomu Matsuo ,  Hirohiko Ishikawa

IPC分类号： F15B11/04 ,  B66F9/22

CPC分类号： F15B11/0413 ,  B66F9/22 ,  F15B2211/20569 ,  F15B2211/30505 ,  F15B2211/30515 ,  F15B2211/3057 ,  F15B2211/353 ,  F15B2211/355 ,  F15B2211/46 ,  F15B2211/473 ,  F15B2211/7052 ,  F15B2211/8606

摘要： An electromagnetic switching valve, for which the maximum opening is set to be small, is disposed on piping between a lift cylinder and a hydraulic pump motor. A pilot check valve, for which the maximum opening is set to be larger than the electromagnetic switching valve, is disposed on piping, different from the piping, between the lift cylinder and the hydraulic pump motor. In addition, during lowering operations, first, the electromagnetic switching valve is opened, and then after the same is opened, the pilot check valve is opened after a prescribed time has passed. Thus, the shock generated when lowering an object to be raised/lowered is reduced and a fork is operated quickly.

公开(公告)号：US09835179B2

公开(公告)日：2017-12-05

申请号：US14785887

申请日：2014-03-31

申请人： Danfoss Power Solutions ApS

发明人： Frede Callesen ,  Dirk Wroblewski

IPC分类号： F16K11/00 ,  F15B11/024 ,  F15B15/14 ,  F16K3/02 ,  G05D7/06 ,  G05D16/20

CPC分类号： F15B11/024 ,  F15B15/149 ,  F15B2011/0246 ,  F15B2211/30565 ,  F15B2211/351 ,  F15B2211/353 ,  F15B2211/6306 ,  F15B2211/6309 ,  F15B2211/6313 ,  F15B2211/665 ,  F15B2211/6654 ,  F15B2211/7053 ,  F15B2211/761 ,  F16K3/0254 ,  G05D7/0652 ,  G05D16/204

摘要： A hydraulic valve arrangement (1) is provided comprising comprising a supply port arrangement having a high pressure port (2) and a low pressure port (4), a working port arrangement having two working ports (6, 7), a first valve (13) arranged between said high pressure port (2) and said working port arrangement (6, 7), a second valve (14) arranged between said low pressure port (4) and said working port arrangement (6, 7), a controller (19) for controlling said first valve (13) and said second valve (14), said controller (19) having an input connection (20) for receiving a signal of an operator input device, and a regenerative flow path which can be established by means of at least one of said first valve (13) and said second valve (14). The function of such a hydraulic valve arrangement should be enhanced. To this end said controller (19) said controller interrupts said regenerative flow path when a feed pressure at said working port arrangement (6, 7) exceeds a predetermined pressure level.

公开(公告)号：US09702118B2

公开(公告)日：2017-07-11

申请号：US14547672

申请日：2014-11-19

申请人： Caterpillar Inc.

发明人： Corey Lee Gorman ,  John J. Krone ,  Adam Martin Nackers

IPC分类号： F15B11/024 ,  E02F9/22 ,  F15B21/14 ,  E02F3/32 ,  E02F9/08 ,  F15B1/02

CPC分类号： E02F9/2225 ,  E02F3/32 ,  E02F9/0866 ,  E02F9/2217 ,  E02F9/2246 ,  E02F9/2285 ,  E02F9/2296 ,  F15B1/024 ,  F15B21/14 ,  F15B2211/212 ,  F15B2211/329 ,  F15B2211/353 ,  F15B2211/355 ,  F15B2211/6355 ,  F15B2211/67 ,  F15B2211/7058 ,  F15B2211/7135 ,  F15B2211/761

摘要： A hydraulic system is disclosed for use with a machine. The hydraulic system may have a pump configured to pressurize fluid, a first actuator configured to receive pressurized fluid from the pump, and an accumulator configured to receive fluid from the first actuator. The hydraulic system may also have a second actuator configured to receive pressurized fluid from the pump and the accumulator, and a pilot circuit configured to receive pressurized fluid from the pump and the accumulator. The hydraulic system may further have at least one valve movable to provide priority of fluid flow from the accumulator to the pilot circuit over the second actuator when a pressure of the accumulator is less than a low-pressure threshold.

公开(公告)号：US09476432B2

公开(公告)日：2016-10-25

申请号：US14046328

申请日：2013-10-04

申请人： HUSCO International, Inc.

发明人： Jason Greenwood ,  Matthew J. Rades ,  Susan Kelpin

IPC分类号： F15B13/043 ,  F15B13/01 ,  F15B13/02

CPC分类号： F15B13/0433 ,  F15B13/015 ,  F15B13/021 ,  F15B2211/353 ,  Y10T137/0318 ,  Y10T137/86879

摘要： An apparatus has a pilot-operated spool valve connecting first and second work passages selectively to a supply conduit and a tank conduit. A first check valve normally allows fluid flow only in one direction from the first work passage to a first workport and when pilot-operated allows bidirectional fluid flow. A second check valve normally allows fluid flow only from the second work passage to a second workport and when pilot-operated allows bidirectional fluid flow. A first pilot valve selectively applies pressure to one end of the spool and to pilot operate the first check valve. A second pilot valve selectively applies pressure to another end of the spool and to pilot operate the second check valve. When fluid drains from a workport to the tank conduit, the associated check valve operates to maintain a predefined pressure in the first or second work passage through which that fluid flows.

摘要翻译： 一种装置具有先导操作的滑阀，其将第一和第二工作通道选择性地连接到供应管道和罐管道。 第一止回阀通常允许仅在从第一工作通道到第一工作端口的一个方向上流体流动，并且当先导操作允许双向流体流动时。 第二止回阀通常仅允许流体从第二工作通道流到第二工作端口，并且当先导操作允许双向流体流动时。 第一先导阀选择性地向阀芯的一端施加压力，并且先导操作第一止回阀。 第二先导阀选择性地向阀芯的另一端施加压力，并且先导操作第二止回阀。 当流体从工作口排出到罐管道时，相关联的止回阀操作以在第一或第二工作通道中保持预定的压力，通过该流体流动。

公开(公告)号：US20150096291A1

公开(公告)日：2015-04-09

申请号：US14384399

申请日：2013-03-25

申请人： KAYABA INDUSTRY CO., LTD.

发明人： Tooru Takeuchi

IPC分类号： E02F9/22 ,  F15B13/042 ,  F15B13/04 ,  F15B11/00 ,  F15B13/02

CPC分类号： E02F9/2285 ,  E02F9/2203 ,  E02F9/2221 ,  E02F9/2225 ,  E02F9/2267 ,  F15B11/003 ,  F15B11/044 ,  F15B13/01 ,  F15B13/021 ,  F15B13/0402 ,  F15B13/042 ,  F15B13/0422 ,  F15B2211/20576 ,  F15B2211/30515 ,  F15B2211/30565 ,  F15B2211/3157 ,  F15B2211/329 ,  F15B2211/353 ,  F15B2211/355 ,  F15B2211/365 ,  F15B2211/40515 ,  F15B2211/41527 ,  F15B2211/428 ,  F15B2211/46 ,  F15B2211/50545 ,  F15B2211/5151 ,  F15B2211/575 ,  F15B2211/7053 ,  F15B2211/715 ,  F15B2211/761 ,  F16K11/0716 ,  F16K31/1221

摘要： A fluid pressure control device includes a switching valve that operates in conjunction with a control valve by a pilot pressure to switch an operation of an operated check valve. The switching valve includes a spool that moves according to the pilot pressure of a pilot chamber, and a piston that is accommodated in the pilot chamber and imparts a thrust force to the spool upon receiving the pilot pressure. The piston includes a first piston that is slidingly accommodated in the pilot chamber and is acted upon by the pilot pressure, and a second piston whose distal end faces the spool and is inserted into an accommodating hole formed in the first piston. A spherical protrusion is provided on a center of either one of a bottom surface of the accommodating hole of the first piston and a back surface of the second piston.

摘要翻译： 流体压力控制装置包括切换阀，其通过先导压力与控制阀一起操作以切换操作的止回阀的操作。 切换阀包括根据先导室的先导压力移动的阀芯和容纳在先导室中的活塞，并且在接收到先导压力时向阀芯施加推力。 活塞包括滑动地容纳在先导室中并被先导压力作用的第一活塞，以及第二活塞，其顶端面向阀芯并插入形成在第一活塞中的容纳孔中。 在第一活塞的容纳孔的底表面和第二活塞的后表面的中心上设置有球形突起。

公开(公告)号：US20130300128A1

公开(公告)日：2013-11-14

申请号：US13696671

申请日：2012-01-20

申请人： Kazuo Fujishima ,  Mitsuo Sonoda ,  Seiji Hijikata

发明人： Kazuo Fujishima ,  Mitsuo Sonoda ,  Seiji Hijikata

IPC分类号： H02K7/18

CPC分类号： H02K7/1853 ,  E02F9/2075 ,  E02F9/2091 ,  E02F9/2217 ,  E02F9/2285 ,  F15B21/14 ,  F15B2211/353 ,  F15B2211/6654 ,  F15B2211/761

摘要： A motive power regeneration apparatus for a working machine includes a regeneration circuit that is connected to a hydraulic line through which a returning fluid of a boom cylinder is distributed during a boom lowering operation. Also included are a hydraulic motor connected to a generator, a flow regulating circuit that is connected to the hydraulic line and provided with a control valve, an inverter that controls the flow rate on the regeneration circuit in accordance with a first flow rate setting which varies with the operation amount of an operating apparatus, and a control valve and a proportional valve that control the flow rate on the flow regulating circuit in accordance with a second flow rate setting which varies with the operation amount of the operating apparatus. Therefore, the motive power regeneration apparatus is capable of making an operator constantly feel comfortable with the working machine operations.

摘要翻译： 用于工作机械的动力再生装置包括再生回路，该再生回路连接到在动臂下降动作期间分配有动臂缸的返回流体的液压管路。 还包括连接到发电机的液压马达，连接到液压管路并设置有控制阀的流量调节电路，根据变化的第一流量设定来控制再生电路上的流量的逆变器 以及操作装置的操作量，以及根据随着操作装置的操作量而变化的第二流量设定来控制流量调节电路上的流量的控制阀和比例阀。 因此，动力再生装置能够使操作者对工作机械的操作感到舒适。

公开(公告)号：US20100083651A1

公开(公告)日：2010-04-08

申请号：US11988908

申请日：2006-01-27

申请人： Ivan Hristov ,  Josef Zürcher

发明人： Ivan Hristov ,  Josef Zürcher

IPC分类号： F16D31/02

CPC分类号： F15B11/003 ,  B66F9/22 ,  E02F9/2203 ,  F15B11/024 ,  F15B13/021 ,  F15B2211/30505 ,  F15B2211/3051 ,  F15B2211/30515 ,  F15B2211/30525 ,  F15B2211/3058 ,  F15B2211/3127 ,  F15B2211/3144 ,  F15B2211/31576 ,  F15B2211/31588 ,  F15B2211/329 ,  F15B2211/351 ,  F15B2211/353 ,  F15B2211/50518 ,  F15B2211/55 ,  F15B2211/88

摘要： Circuit for controlling a double-action hydraulic drive cylinder includes a directional control valve having working ports A and B, a pump port P, and a tank port T, wherein the directional control valve has a neutral position in which pump port P is blocked and working ports A, B are connected to tank port T. A pressure-limiting valve and a controllable load-holding valve are connected to the piston space in parallel, and a regeneration check valve is connected in series between a connection point for the parallel components and the rod space. A first precharge valve is connected between the working port A and the connection point, and a first bypass check valve is connected anti-parallel parallel with the first precharge valve and the load-holding valve. A second precharge valve is connected in series with the directional control valve between the tank port P and the rod space.

公开(公告)号：US07451685B2

公开(公告)日：2008-11-18

申请号：US11079059

申请日：2005-03-14

申请人： Keith A. Tabor

发明人： Keith A. Tabor

IPC分类号： F15B13/16

CPC分类号： F15B21/14 ,  F15B11/006 ,  F15B11/163 ,  F15B21/082 ,  F15B2211/30575 ,  F15B2211/327 ,  F15B2211/351 ,  F15B2211/353 ,  F15B2211/63 ,  F15B2211/6309 ,  F15B2211/6313 ,  F15B2211/6654 ,  F15B2211/6658 ,  F15B2211/7053 ,  F15B2211/71 ,  F15B2211/75 ,  F15B2211/78 ,  F15B2211/88

摘要： A system operates a hydraulic actuator, such as a cylinder, in one of several modes that include powered extension and retraction, self-powering regeneration modes in which fluid exhausting from one cylinder chamber is routed into the other cylinder chamber, and cross function regeneration modes wherein the fluid exhausted from one actuator is routed in the supply conduit to power a different actuator. A controller determines which modes are viable based on existing system conditions and selects from among the viable available modes. That determination is a function of the desired velocity for the actuator, the hydraulic load on the actuator, and pressures in the supply and return hydraulic conduits. The system also can recover potential or kinetic energy through pressure intensification which recovered energy can be used to power another simultaneously active hydraulic function or to drive the prime mover via an over-center variable pump/motor.

摘要翻译： 系统将液压致动器（例如气缸）操作在包括动力伸展和回缩的多种模式中的一种模式中，其中一个气缸室中排出的液体排出到另一气缸室中的自动再生模式以及交叉功能再生模式 其中从一个致动器排出的流体在供应导管中被路由以为不同的致动器供电。 控制器根据现有系统条件确定哪些模式可行，并从可行的可用模式中进行选择。 该确定是致动器的期望速度，致动器上的液压负载以及供应和返回液压管道中的压力的​​函数。 该系统还可以通过压力增强来恢复潜能或动能，回收的能量可用于为另一个同时有效的液压功能供电，或通过一个过中心的可变泵/电机来驱动原动机。