Hydraulic drive system for construction machine
    3.
    发明授权
    Hydraulic drive system for construction machine 有权
    施工机械液压驱动系统

    公开(公告)号:US08857169B2

    公开(公告)日:2014-10-14

    申请号:US13121040

    申请日:2009-09-09

    IPC分类号: F15B11/16 E02F9/22

    摘要: A main relief valve 13 includes a biasing force altering unit 60, which constitutes, in combination with a gate lock valve 23 and a gate lock lever 24, relief pressure altering means for manually switching the relief pressure of the main relief valve 13 between a first pressure (a standard pressure of 25 MPa, for example) and a second lower pressure for engine start-up (e.g., 3.0 MPa). This allows the main relief valve 13 to return the hydraulic fluid discharged from a hydraulic pump 2 to a tank T in conjunction with an unloading valve 9 when multiple actuators 5a, 5b, . . . are not in operation under the ambient temperature below freezing point. As a result, it is possible to reduce the load on the hydraulic pump during cold engine start-up without compromising the anti-hunting characteristics of the unloading valve, thereby improving the engine start-up performance.

    摘要翻译: 主安全阀13包括偏压力改变单元60,该偏压力改变单元60与闸门锁定阀23和闸门锁定杆24组合,安全压力改变装置,用于手动地将主安全阀13的溢流压力切换到第一 压力(例如,25MPa的标准压力)和用于发动机起动的第二较低压力(例如,3.0MPa)。 这允许主安全阀13在多个致动器5a,5b,...时将与液压泵2排出的液压流体连同卸载阀9一起返回到储罐T. 。 。 在低于冰点的环境温度下不工作。 结果,可以在冷启动时降低液压泵的负荷,而不会影响卸载阀的防狩猎特性,从而提高发动机起动性能。

    ELECTRIC DRIVE UNIT FOR CONSTRUCTION MACHINE
    4.
    发明申请
    ELECTRIC DRIVE UNIT FOR CONSTRUCTION MACHINE 有权
    建筑机械电驱动装置

    公开(公告)号:US20140046552A1

    公开(公告)日:2014-02-13

    申请号:US14113658

    申请日:2012-05-10

    IPC分类号: E02F9/22

    摘要: An electric drive unit for a construction machine is capable of increasing the operating time of the construction machine. The electric drive unit has an electricity storage device, a hydraulic pump of the fixed displacement type which is driven by a motor/generator, a plurality of directional control valves which respectively control the flow of hydraulic fluid supplied to a plurality of hydraulic actuators, a bidirectional converter which performs variable control on the revolution speed of the motor/generator, and an LS control device which controls the bidirectional converter so that LS differential pressure Pls equals a target value Pgr. The bidirectional converter performs regeneration control for converting the inertial force of the rotor of the motor/generator into electric power thereby charging the electricity storage device when the revolution speed of the motor/generator is decreased in response to an excess of the LS differential pressure Pls over the target value Pgr.

    摘要翻译: 用于建筑机械的电驱动单元能够增加施工机械的操作时间。 电驱动单元具有蓄电装置,由电动机/发电机驱动的固定排量型的液压泵,分别控制供给多个液压致动器的液压流体的流量的多个方向控制阀, 双向转换器,其对电动机/发电机的转速进行可变控制;以及LS控制装置,其控制双向转换器,使得LS压差P1s等于目标值Pgr。 双向转换器执行用于将电动机/发电机的转子的惯性力转换成电力的再生控制,从而当电动机/发电机的转速响应于LS压差P1s过大而减小时对蓄电装置充电 超过目标值Pgr。

    HYDRAULIC DRIVE SYSTEM FOR CONSTRUCTION MACHINE
    5.
    发明申请
    HYDRAULIC DRIVE SYSTEM FOR CONSTRUCTION MACHINE 有权
    液压驱动系统

    公开(公告)号:US20110173964A1

    公开(公告)日:2011-07-21

    申请号:US13121040

    申请日:2009-09-09

    IPC分类号: F16H61/433

    摘要: A main relief valve 13 includes a biasing force altering unit 60, which constitutes, in combination with a gate lock valve 23 and a gate lock lever 24, relief pressure altering means for manually switching the relief pressure of the main relief valve 13 between a first pressure (a standard pressure of 25 MPa, for example) and a second lower pressure for engine start-up (e.g., 3.0 MPa). This allows the main relief valve 13 to return the hydraulic fluid discharged from a hydraulic pump 2 to a tank T in conjunction with an unloading valve 9 when multiple actuators 5a, 5b, . . . are not in operation under the ambient temperature below freezing point. As a result, it is possible to reduce the load on the hydraulic pump during cold engine start-up without compromising the anti-hunting characteristics of the unloading valve, thereby improving the engine start-up performance.

    摘要翻译: 主安全阀13包括偏压力改变单元60,该偏压力改变单元60与闸门锁定阀23和闸门锁定杆24组合,安全压力改变装置,用于手动地将主安全阀13的溢流压力切换到第一 压力(例如,25MPa的标准压力)和用于发动机起动的第二较低压力(例如,3.0MPa)。 这允许主安全阀13在多个致动器5a,5b,...时将与液压泵2排出的液压流体连同卸载阀9一起返回到储罐T. 。 。 在低于冰点的环境温度下不工作。 结果,可以在冷启动时降低液压泵的负荷,而不会影响卸载阀的防狩猎特性,从而提高发动机起动性能。

    Hydraulic drive system for construction machine
    6.
    发明授权
    Hydraulic drive system for construction machine 有权
    施工机械液压驱动系统

    公开(公告)号:US09200431B2

    公开(公告)日:2015-12-01

    申请号:US13641571

    申请日:2011-03-09

    IPC分类号: F15B9/17 E02F9/22 F15B11/16

    摘要: A hydraulic drive system for a construction machine has a travel detection device which detects whether or not the operation mode is a traveling operation and a setting changing device. The setting changing device sets the target differential pressure of load sensing control at an absolute pressure Pa when the operation mode is not a traveling operation, and sets the target differential pressure of the load sensing control at an absolute pressure Pa′ rather than the absolute pressure Pa. In this way, in the actuator operation other than traveling, a necessary actuator speed can be obtained and supplied with the necessary maximum flow rate. In addition, during the combined operation, a flow rate in accordance with the opening area ratios of flow control valves can be distributed to actuators different in load pressure from one another; and energy efficiency is enhanced due to less energy loss during traveling operation.

    摘要翻译: 用于建筑机械的液压驱动系统具有行驶检测装置,其检测操作模式是行驶操作还是设置改变装置。 设定更改装置将操作模式不是行驶操作时的负载感测控制的目标压差设定在绝对压力Pa,将负载感测控制的目标压差设定为绝对压力Pa'而不是绝对压力 以这种方式,除了行驶之外的致动器操作中,可以获得必要的致动器速度并提供必要的最大流量。 此外,在组合操作中,根据流量控制阀的开口面积比的流量可以分配给彼此负载压力不同的致动器; 并且由于行驶中的能量损失较少,能量效率得到提高。

    Hydraulic Drive System
    9.
    发明申请
    Hydraulic Drive System 审中-公开
    液压驱动系统

    公开(公告)号:US20090031719A1

    公开(公告)日:2009-02-05

    申请号:US11576559

    申请日:2006-05-08

    IPC分类号: F15B11/17 F15B13/06

    摘要: The hydraulic drive system comprises an engine 1, a pump unit 100, a plurality of actuators 5a, 5b and 5c, a control valve unit 4, and engine revolution speed detecting means 4f. The pump unit 100 includes a pump tilting control mechanism 8 for load sensing control, and the control valve unit 4 includes a plurality of flow control valves 15a, 15b and 15c and pressure compensation valves 10a, 10b and 10c. The engine revolution speed detecting means 4f includes a first differential pressure reducing valve 14 for outputting, as an absolute value, a pressure depending on an engine revolution speed. The output pressure of the first differential pressure reducing valve 14 is introduced, as a target load-sensing differential pressure, to the pump tilting mechanism 8 via a line 127.

    摘要翻译: 液压驱动系统包括发动机1,泵单元100,多个致动器5a,5b和5c,控制阀单元4和发动机转速检测装置4f。 泵单元100包括用于负载感测控制的泵倾转控制机构8,并且控制阀单元4包括多个流量控制阀15a,15b和15c以及压力补偿阀10a,10b和10c。 发动机转速检测装置4f包括用于输出取决于发动机转速的压力作为绝对值的第一差压减压阀14。 第一差压减压阀14的输出压力通过管线127作为目标载荷感测差压引入泵倾斜机构8。

    Winding and cutting machine for rolled paper
    10.
    发明授权
    Winding and cutting machine for rolled paper 失效
    卷纸卷绕切割机

    公开(公告)号:US06915980B2

    公开(公告)日:2005-07-12

    申请号:US10376316

    申请日:2003-03-03

    申请人: Yasutaka Tsuruga

    发明人: Yasutaka Tsuruga

    摘要: A winding and cutting machine for rolled paper provided with a roller shaft holding a roll from an inner side, a feeding roller and a feeding aid roller to hold and pull the paper for a predetermined length, and a fixed cutting blade disposed between the feeding roller and a winding rotational body which is constructed as to press the paper to the fixed cutting blade into the predetermined length by winding the paper and giving tensile force to the paper.

    摘要翻译: 一种用于卷纸的卷绕切割机,其具有从内侧保持辊的辊轴,进给辊和进给辅助辊,用于将纸张保持和拉出预定长度;以及固定切割刀片,设置在进给辊之间 以及卷绕旋转体,其被构造成通过卷绕纸张并向纸张施加张力将纸张压向固定切割刀片到预定长度。