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    HYDRAULIC EXCAVATOR DRIVE SYSTEM
    1.
    发明申请
    HYDRAULIC EXCAVATOR DRIVE SYSTEM 审中-公开

    公开(公告)号：US20180080196A1

    公开(公告)日：2018-03-22

    申请号：US15711497

    申请日：2017-09-21

    申请人： KAWASAKI JUKOGYO KABUSHIKI KAISHA

    发明人： Akihiro KONDO ,  Takehisa KATO

    IPC分类号： E02F9/22

    CPC分类号： E02F9/226 ,  E02F9/2228 ,  F15B2211/20576 ,  F15B2211/30525 ,  F15B2211/329 ,  F15B2211/40576

    摘要： A hydraulic excavator drive system includes: a control valve for a cylinder that swings a swinging unit; an operation device that outputs an operation signal in accordance with an inclination angle of an operating lever when receiving a first operation of moving the swinging unit closer to a cabin or a second operation of moving the swinging unit farther from the cabin; a solenoid proportional valve connected to a first pilot port of the control valve, the first pilot port being intended for the first operation; and a controller that, when the operation device receives the first operation, controls the solenoid proportional valve such that: a pilot pressure outputted from the solenoid proportional valve is proportional to the operation signal outputted from the operation device until the pilot pressure reaches an upper limit pressure; and the closer the swinging unit to the cabin, the higher the upper limit pressure.

    Hydraulic system
    2.
    发明授权
    Hydraulic system 有权

    公开(公告)号：US09605690B2

    公开(公告)日：2017-03-28

    申请号：US14374854

    申请日：2012-01-31

    申请人： Yuichi Taguchi

    发明人： Yuichi Taguchi

    IPC分类号： F15B11/20 ,  F15B11/02

    CPC分类号： F15B11/20 ,  F15B11/022 ,  F15B2211/405 ,  F15B2211/40576 ,  F15B2211/41527 ,  F15B2211/428 ,  F15B2211/7053 ,  F15B2211/7121 ,  F15B2211/783

    摘要： A hydraulic system, wherein an actuating cylinder and an accelerating cylinder each includes a piston, a rod, and a tube. When the rod of the actuating cylinder extends in an unloaded condition, a circuit is configured such that oil discharged from the bottom-side section of the accelerating cylinder is supplied to the bottom-side section of the actuating cylinder through a bottom line. When the rod of the actuating cylinder extends in a loaded condition, a circuit is configured such that oil supplied to the bottom line without passing through the accelerating cylinder is supplied to the bottom-side section of the actuating cylinder. The circuit for the unloaded condition and the circuit for the loaded condition is switched based on a pressure sensing in the bottom line.

    Hydraulic control in monoblock structure for lifting and lowering a load with at least two electromagnetically actuatable proportional distributing valve elements
    5.
    发明授权
    Hydraulic control in monoblock structure for lifting and lowering a load with at least two electromagnetically actuatable proportional distributing valve elements 失效
    用于通过至少两个可电磁致动的比例分配阀元件提升和降低负载的整体结构中的液压控制

    公开(公告)号：US5839345A

    公开(公告)日：1998-11-24

    申请号：US880967

    申请日：1997-06-23

    申请人： Hartmut Sandau, deceased ,  Werner Schumacher ,  Rainer Trucksess ,  Holger Lueues

    发明人： Hartmut Sandau, deceased ,  Werner Schumacher ,  Rainer Trucksess ,  Holger Lueues

    IPC分类号： B66F3/24 ,  B66F9/22 ,  F15B11/00 ,  F15B11/04 ,  F15B13/01 ,  F15B13/044 ,  F15B11/08

    CPC分类号： F15B13/015 ,  F15B11/003 ,  F15B2211/20538 ,  F15B2211/30505 ,  F15B2211/40515 ,  F15B2211/40576 ,  F15B2211/413 ,  F15B2211/41572 ,  F15B2211/41581 ,  F15B2211/7052

    摘要： A hydraulic circuit in a monoblock structure for lifting and lowering a load has at least two electromagnetically actuatable proportional distributing valve elements, a check valve, a pressure balance for load-independent lifting of the load as an input element, a housing accommodating at least some of the elements and having at least one pump connection, at least one consumer connection, and at least one return connection, the proportional distributing valve elements being disposed parallel to one another, electromagnetic drives seated side-by-side on a same side and at a same height, the pressure balance having a piston which is disposed coaxially next to a longitudinal slide of a first one of the proportional distributing valve elements in a bore that guides and supports both the valve elements, the longitudinal slide of the first proportional distributing valve elements being spring-loaded, and at least one component for adjusting a prestressing and bracing of a spring on the housing of a control penetrating the piston of the pressure balance.

    摘要翻译： 用于提升和降低负载的单块结构中的液压回路具有至少两个可电磁致动的比例分配阀元件，止回阀，用于负载独立提升作为输入元件的负载的压力平衡，容纳至少一些 的元件并具有至少一个泵连接，至少一个消耗连接和至少一个返回连接，所述比例分配阀元件彼此平行设置，电磁驱动器并排在同一侧和 相同的高度，压力平衡具有活塞，该活塞在引导和支撑两个阀元件的孔中同轴地布置在比例分配阀元件中的第一个比例分配阀元件的纵向滑动件上，第一比例分配阀 弹簧加载的元件以及用于调节外壳上弹簧的预应力和支撑的至少一个部件 一个渗透压力平衡活塞的控制器。

    HYDRAULIC CONTROL DEVICE OF A FORKLIFT TRUCK
    9.
    发明申请
    HYDRAULIC CONTROL DEVICE OF A FORKLIFT TRUCK 审中-公开
    叉车液压控制装置

    公开(公告)号：US20160332854A1

    公开(公告)日：2016-11-17

    申请号：US15152012

    申请日：2016-05-11

    申请人： KABUSHIKI KAISHA TOYOTA JIDOSHOKKI

    发明人： Yuki UEDA ,  Naoya YOKOMACHI ,  Tsutomu MATSUO ,  Takashi UNO ,  Tetsuya GOTO ,  Takanori KANNA

    IPC分类号： B66F9/22 ,  F15B13/06 ,  F15B13/02 ,  B66F9/20 ,  F15B11/16

    CPC分类号： B66F9/22 ,  B66F9/205 ,  F15B11/161 ,  F15B13/021 ,  F15B13/06 ,  F15B2211/20515 ,  F15B2211/40576

    摘要： A hydraulic control device of a forklift truck includes a first hydraulic cylinder, a first instruction member, a second hydraulic cylinder, a second instruction member, a hydraulic pump, an electric motor, a first passage which has a drain passage, a lowering control valve that controls flow of hydraulic oil, a flow rate control valve, and a controller. When a lowering operation of forks and an operation of a hydraulically-operated unit are performed simultaneously, when a required rotation speed of the hydraulic pump that is required for operating the hydraulically-operated unit at an instruction speed based on an operation of the second instruction member is a specified rotation speed or lower, the controller controls an instruction rotation speed of the electric motor so as to operate the hydraulic pump at the required rotation speed to thereby restrict the operation of the hydraulic pump.

    摘要翻译： 叉车的液压控制装置包括第一液压缸，第一指令构件，第二液压缸，第二指令构件，液压泵，电动马达，具有排水通道的第一通道，下降控制阀 其控制液压油的流动，流量控制阀和控制器。 当同时执行叉的下降操作和液压操作单元的操作时，当以基于第二指令的操作的指令速度操作液压操作单元所需的液压泵所需的转速 构件是指定的转速或更低的速度，控制器控制电动机的指令转速，以便以所需的转速操作液压泵，从而限制液压泵的操作。

    Digital Hydraulics Valve Stage
    10.
    发明申请
    Digital Hydraulics Valve Stage 有权
    数字液压阀门

    公开(公告)号：US20120286180A1

    公开(公告)日：2012-11-15

    申请号：US13508600

    申请日：2010-11-04

    申请人： Hermann Mehling ,  Daniel Weiler

    发明人： Hermann Mehling ,  Daniel Weiler

    IPC分类号： F16K31/06 ,  F16K11/24

    CPC分类号： F15B11/0426 ,  F15B2211/351 ,  F15B2211/40576 ,  F15B2211/40592 ,  Y10T137/87314 ,  Y10T137/87772

    摘要： A digital hydraulics valve includes a plurality of digitally switchable individual valves, which are connected in parallel with respect to a load, and at least one equalizing valve for generating intermediate values between the opening cross-section stages that can be implemented by the digitally switchable individual valves. The equalizing valve is a poppet valve, which provides a partial opening cross-section smaller than the nominal opening cross-section thereof by actuation using a time switching pattern. The time switching pattern is preferably based on the principle of a pulse width modulation. The equalizing valve is further preferably a valve selected from the plurality of individual valves of the digital hydraulics valve.

    摘要翻译： 数字液压阀包括相对于负载并联连接的多个数字可切换单个阀和至少一个均衡阀，用于在可由数字可切换的个体实现的开放横截面级之间产生中间值 阀门 均压阀是提升阀，其通过使用时间切换模式的致动来提供小于其标称开口横截面的部分开口横截面。 时间切换模式优选地基于脉冲宽度调制的原理。 均压阀更优选地是选自数字液压阀的多个单独阀的阀。