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211 条记录 (耗时 0.027 秒)

    WORK MACHINE
    1.
    发明授权
    WORK MACHINE 有权

    公开(公告)号：EP3073125B1

    公开(公告)日：2018-09-26

    申请号：EP14864885.0

    申请日：2014-11-07

    申请人： Hitachi Construction Machinery Co., Ltd.

    发明人： TAKAHASHI Hiromasa

    IPC分类号： F15B11/02 ,  E02F9/22 ,  F15B11/17 ,  E02F3/43

    CPC分类号： E02F3/435 ,  E02F9/2207 ,  E02F9/2235 ,  E02F9/2289 ,  E02F9/2292 ,  E02F9/2296 ,  F15B11/17 ,  F15B2211/20561 ,  F15B2211/20569 ,  F15B2211/20576 ,  F15B2211/27 ,  F15B2211/30595 ,  F15B2211/71

    摘要： Provided is a work machine driving device which can reduce unnecessary switching control of switching valves. The present invention is configured so that at least two closed-circuit hydraulic pumps 2a to 2f can be connected in a closed loop to any one of hydraulic actuators 7a to 7c, 10c through electromagnetic switching valves 12, in which a controller 16 includes a priority order calculating circuit 31 which calculates the allocation of the closed-circuit hydraulic pumps 2a to 2f to the hydraulic actuators 7a to 7c, 10c according to operation of operation levers 17a, 17b and a priority order map 32 determining priority connection relationships between the closed-circuit hydraulic pumps 2a to 2f and the hydraulic actuators 7a to 7c, 10c, and the priority order calculating circuit 31 selects and allocates an unallocated closed-circuit hydraulic pump 2a to 2f when the number of closed-circuit hydraulic pumps 2a to 2f to be allocated increases.

    HYDROSTATIC SYSTEMS WITH SHUTTLE VALVE FOR COMPENSATING DIFFERENTIAL FLOW RATE OF SINGLE-ROD ACTUATORS
    2.
    发明授权
    HYDROSTATIC SYSTEMS WITH SHUTTLE VALVE FOR COMPENSATING DIFFERENTIAL FLOW RATE OF SINGLE-ROD ACTUATORS 有权

    公开(公告)号：EP3112697B1

    公开(公告)日：2018-09-19

    申请号：EP15174803.5

    申请日：2015-07-01

    申请人： Demirer Teknolojik Sistemler Sanayi ve Ticaret Limited Sirketi

    发明人： ÇALI KAN, Hakan

    IPC分类号： F15B13/02

    CPC分类号： F15B13/027 ,  F15B7/006 ,  F15B13/0402 ,  F15B13/042 ,  F15B2211/20561 ,  F15B2211/20569 ,  F15B2211/212 ,  F15B2211/27 ,  F15B2211/3052 ,  F15B2211/7053

    摘要： The present invention relates to an improvement in the shuttle valve spool (4.2) of a hydraulic unit comprising a single-rod hydraulic actuator (1) having two ports directly connected to the pump (2) inlet-outlet ports, a flow rate controlled pump (2), which regulates the flow rate going to said single-rod hydraulic actuator (1), a hydraulic accumulator (3) used for compensating the differential flow rate formed in the hydrostatic circuit due to hydraulic actuator (1) movement, and a shuttle valve (4) providing bidirectional flow between the hydrostatic circuit and said hydraulic accumulator (3) and comprising shuttle valve spool (4.2) at the inner part thereof. The invention is characterized in that; with the operation of the hydraulic unit, in order to prevent the instability problem encountered during compensation of the differential flow rate occurring as a result of the asymmetric actuator (1) structure, at the center position of said shuttle valve spool (4.2), it comprises: a valve spool overlap (4.7) found between Port A (4.4) that is connected to the cap-side chamber (1.4) of the hydraulic actuator (1) and Port C (4.6) that is connected to the hydraulic accumulator (3); and preventing the flow between the hydraulic accumulator line (C) connected to said hydraulic accumulator (3) and the cap-side chamber line (A) connected to the cap-side chamber (1.4) of the hydraulic actuator (1), and a valve spool underlap (negative spool overlap) (4.8) found between Port B (4.5) that is connected to the rod-side chamber (1.5) of the hydraulic actuator (1) and Port C (4.6) that is connected to the hydraulic accumulator (3); and enabling flow between the hydraulic accumulator line (C) connected to the hydraulic accumulator (3) and the rod-side chamber line (B) connected to the rod-side chamber (1.5) of the hydraulic actuator (1).

    HYDROSTATISCHER ANTRIEB
    5.
    发明公开
    HYDROSTATISCHER ANTRIEB 审中-公开

    公开(公告)号：EP3194758A1

    公开(公告)日：2017-07-26

    申请号：EP15748027.8

    申请日：2015-08-04

    申请人： Robert Bosch GmbH

    发明人： MAST, Michael ,  HERNANDEZ LADERA, Paul Luis

    IPC分类号： F02N7/08 ,  B60K6/12 ,  E02F9/22 ,  F15B21/14

    CPC分类号： F02N7/08 ,  B60K6/12 ,  B60K2006/126 ,  B60Y2400/46 ,  E02F9/2217 ,  E02F9/2246 ,  E02F9/226 ,  E02F9/2292 ,  E02F9/2296 ,  F15B1/033 ,  F15B11/165 ,  F15B2211/20523 ,  F15B2211/20553 ,  F15B2211/20569 ,  F15B2211/212 ,  F15B2211/4053 ,  F15B2211/411 ,  F15B2211/41509 ,  F15B2211/50518 ,  F15B2211/5157 ,  F15B2211/526 ,  F15B2211/6051 ,  F15B2211/625 ,  F15B2211/6306 ,  F15B2211/6313 ,  F15B2211/6343 ,  F15B2211/665 ,  F15B2211/6651 ,  F15B2211/6652

    摘要： The invention relates to a hydrostatic drive, which is used in particular to start an internal combustion engine. The drive comprises a hydraulic machine, which can be adjusted in the swept volume thereof from a maximum positive swept volume to a maximum negative swept volume via a zero swept volume by means of a hydraulic adjusting device and which can be operated as a pump with positive swept volume and as a motor with negative swept volume, a high-pressure accumulator, from which the hydraulic machine can be supplied with pressure medium for operation as a motor via a pressure line, which extends between a pressure connection of the hydraulic machine and the high-pressure accumulator, an accumulator-closing valve having a first position and a second position, which is arranged in the pressure line and by means of which a fluidic connection from the high-pressure accumulator to the hydraulic machine is open in the first position and closed in the second position, and an electronic control unit, in accordance with the signals of which the accumulator-closing valve can be actuated. The problem addressed by the invention is that of designing the hydrostatic drive in such a way that the components of the hydraulic machine are not subjected to high wear and a quick return from the range of negative swept volumes occurs. This problem is solved in that, in the event of an adjustment of the hydraulic machine from a negative swept volume to a positive swept volume, the electronic control device gives a signal for switching over the accumulator-closing valve from the first position to the second position and in that the accumulator-closing valve does not switch over to the second position until there is a zero swept volume or a positive swept volume of the hydraulic machine.

    摘要翻译： 本发明涉及一种特别用于启动内燃机的静液压驱动装置。 该驱动装置包括液压机，该液压机能够借助于液压调节装置通过零扫描容积在其扫掠体积中从最大正扫波体积调节至最大负扫波体积，并且该液压机器可以作为具有正 扫气量和作为具有负扫掠容量的电动机的高压蓄能器，液压机可通过压力管线供应压力介质以作为马达操作，该压力管线在液压机器的压力接口和 具有第一位置和第二位置的蓄压器关闭阀，所述蓄压器关闭阀布置在所述压力管路中，并且借助于所述第一位置和所述第二位置，从所述高压蓄压器到所述液压机的流体连接在所述第一位置中打开 并且在第二位置关闭，并且电子控制单元根据可以致动蓄能器关闭阀的信号。 本发明解决的问题在于设计静液压驱动装置，使得液压机的部件不经受高磨损，并且发生负扫掠体积范围的快速返回。 该问题通过以下方式解决，即，在液压机从负排量到正排量的调节中，电子控制装置给出用于将蓄能器关闭阀从第一位置切换到第二位置的信号 并且蓄压器关闭阀不切换到第二位置，直到液压机器的零扫气量或正扫气量为止。