会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 61. 发明授权
    • Load sensing hydraulic circuit having power matching means
    • 具有动力匹配装置的负载感测液压回路
    • US4024710A
    • 1977-05-24
    • US670151
    • 1976-03-25
    • Lester L. Zelle
    • Lester L. Zelle
    • B62D11/18E02F9/22F15B11/17F16H61/46F16H61/47F15B13/09F16H39/46
    • B62D11/183E02F9/2232E02F9/2239E02F9/2292E02F9/2296F15B11/17F16H61/46F16H61/47F15B2211/20553F15B2211/20576F15B2211/30505F15B2211/30535F15B2211/3133F15B2211/351F15B2211/4053F15B2211/6054F15B2211/65F15B2211/71F15B2211/7142
    • A load sensitive hydraulic circuit for material handling equipment is energized by a prime mover. The hydraulic circuit includes variable displacement pumps coupled to the prime mover and having pressure and flow compensating control means for varying the volumetric output. Each pump is connected to a valve bank which controls various hydraulic actuators of the material handling equipment. Load pressure feedback is provided to the pump compensators for establishing pump flows to operate the actuators at a fixed pressure differential in excess of load pressure. The valve banks contain pressure compensated valves for providing desired fluid flow rates and speeds in the hydraulic actuators. Means are provided to sense reductions in the prime mover speed resulting from excessive hydraulic loads. The means is connected to the pump compensators for simultaneously adjusting the volumetric output of the hydraulic pumps at the preselected pressure differential over the load pressure and power demands on the prime mover so that demands on the prime mover are matched to its available power output.
    • 用于材料处理设备的负载敏感液压回路由原动机通电。 液压回路包括耦合到原动机的可变排量泵,并具有用于改变体积输出的压力和流量补偿控制装置。 每个泵连接到阀组,其控制材料处理设备的各种液压致动器。 负载压力反馈被提供给泵补偿器,用于建立泵流量以在超过负载压力的固定压力差下操作致动器。 阀组包含压力补偿阀,用于在液压致动器中提供所需的流体流速和速度。 提供装置以感测由于过大的液压负载而导致的原动机速度的降低。 该装置连接到泵补偿器,用于在预先选择的压力差上,在原动机上的负载压力和功率需求上同时调节液压泵的体积输出,使得对原动机的要求与其可用功率输出相匹配。
    • 66. 发明专利
    • Hydraulic driving device of hydraulic excavator
    • 液压挖掘机液压驱动装置
    • JP2008150860A
    • 2008-07-03
    • JP2006339981
    • 2006-12-18
    • Hitachi Constr Mach Co Ltd日立建機株式会社
    • NAKAMURA KAZUNORI
    • E02F9/22E02F3/43F15B11/17F15B21/14
    • F15B21/14E02F3/437E02F9/2217E02F9/2296F15B2211/20546F15B2211/3133F15B2211/31588F15B2211/329F15B2211/88
    • PROBLEM TO BE SOLVED: To provide a hydraulic driving device of a hydraulic excavator for efficiently performing horizontal leveling work, by using remaining energy of pressure oil in a hydraulic circuit of not paying attention in a conventional technology. SOLUTION: This hydraulic driving device of the hydraulic excavator has a boom cylinder 1 and an arm cylinder 2, a main hydraulic pump 4 supplying the pressure oil to both cylinders 1 and 2, a directional control valve 7 for a boom and a directional control valve 8 for an arm for respectively controlling a flow of the pressure oil supplied to the boom cylinder 1 and the arm cylinder 2, and a tank oil passage 8c connecting the directional control valve 8 for the arm to a hydraulic fluid tank 6. A flow control valve 15 capable of selectively closing the tank oil passage 8c is provided. When rod side hydraulic pressure of the arm cylinder 2 increases to a preset value or more when performing the horizontal leveling work by composite operation of boom lifting and arm crowding, the outflow of rod side pressure oil of the arm cylinder 2 to the hydraulic fluid tank 8c, is checked by closing the tank oil passage 8c by the flow control valve 15, and the rod side pressure oil is supplied to the bottom side of the boom cylinder 1. COPYRIGHT: (C)2008,JPO&INPIT
    • 要解决的问题:提供一种液压挖掘机的液压驱动装置,用于通过在传统技术中不注意的液压回路中使用压力油的剩余能量来有效地执行水平流平作业。 解决方案:液压挖掘机的该液压驱动装置具有动臂缸1和斗杆缸2,向两个缸1和2供应压力油的主液压泵4,用于吊杆的方向控制阀7和 用于分别控制供给到动臂缸1和斗杆缸2的压力油的流动的臂的方向控制阀8和将臂的方向控制阀8连接到液压油箱6的油箱油路8c。 提供能够选择性地关闭油箱油路8c的流量控制阀15。 当通过吊臂提升和斗臂拥挤的复合操作进行水平调平作业时,臂缸2的杆侧液压增加到预设值以上时,将臂缸2的杆侧压力油流出到液压油箱 如图8c所示,通过流量控制阀15关闭油箱油路8c进行检查,将杆侧压力油供给到动臂缸1的底侧。版权所有(C)2008,JPO&INPIT
    • 70. 发明授权
    • Hydraulic system with bi-directional regeneration
    • 液压系统具有双向再生
    • US09003951B2
    • 2015-04-14
    • US13253143
    • 2011-10-05
    • Edwin Sefcik
    • Edwin Sefcik
    • F15B11/036F15B11/024F15B15/14
    • F15B11/024F15B15/1466F15B15/149F15B2211/3133F15B2211/7055Y10T29/494
    • A hydraulic actuator system including an actuator and a valve assembly configured for bi-directional regeneration. The actuator may include a hollow body and a rod disposed within and extending outwardly from the hollow body. The rod may include a first chamber within the rod and a piston disposed at one end of the rod, defining a second chamber and a third chamber within the hollow body. A valve assembly may be in fluid communication with a first conduit, a second conduit, the first chamber, the second chamber, and the third chamber, wherein the valve assembly is configured to selectively couple one of the first conduit and the second conduit to one or more of the first port, the second port, and the third port, wherein one of the first conduit and the second conduit is configured as a pressure source.
    • 液压致动器系统,包括致动器和构造成用于双向再生的阀组件。 致动器可以包括中空体和设置在中空体内并从中空体向外延伸的杆。 杆可以包括在杆内的第一腔室和设置在杆的一端的活塞,在第二腔室和中空体内的第三腔室中。 阀组件可以与第一管道,第二管道,第一室,第二室和第三室流体连通,其中阀组件被配置为选择性地将第一管道和第二管道中的一个连接到一个 或更多的第一端口,第二端口和第三端口,其中第一导管和第二导管中的一个被配置为压力源。