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公开(公告)号：US07650907B2
公开(公告)日：2010-01-26
申请号：US11894508
申请日：2007-08-20
IPC分类号： F16K11/07
CPC分类号： F15B11/044 , F15B13/01 , F15B2211/327 , F15B2211/351 , F15B2211/353 , F15B2211/7052 , F15B2211/75 , Y10T137/8671
摘要： A hydraulic control apparatus for a single action cylinder includes a switch valve for supplying fluid to and draining fluid from the cylinder, a cylinder side passage connected to the cylinder, a switch valve side passage connected to the switch valve, and a valve body accommodation chamber. The valve body accommodation chamber linearly extends between the cylinder side passage and the switch valve side passage. An on-off valve is located in a vicinity of a first end of the valve body accommodation chamber. The on-off valve defines a first back pressure chamber. A flow control valve is located in a vicinity of a second end that is opposite to the first end. The flow control valve defines a second back pressure chamber. The on-off valve and the flow control valve are separated from each other by a partitioning member.
摘要翻译： 用于单动作气缸的液压控制装置包括用于向缸体供给流体和排出流体的开关阀，连接到气缸的气缸侧通道，连接到开关阀的开关阀侧通道和阀体容置室 。 阀体容纳室在气缸侧通路与开关阀侧通路之间直线延伸。 开关阀位于阀体容纳室的第一端附近。 开关阀限定第一背压室。 流量控制阀位于与第一端相对的第二端附近。 流量控制阀限定第二背压室。 开关阀和流量控制阀通过分隔构件彼此分离。
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公开(公告)号：US20080053304A1
公开(公告)日：2008-03-06
申请号：US11894508
申请日：2007-08-20
IPC分类号： F15B11/08
CPC分类号： F15B11/044 , F15B13/01 , F15B2211/327 , F15B2211/351 , F15B2211/353 , F15B2211/7052 , F15B2211/75 , Y10T137/8671
摘要： A hydraulic control apparatus for a single action cylinder includes a switch valve for supplying fluid to and draining fluid from the cylinder, a cylinder side passage connected to the cylinder, a switch valve side passage connected to the switch valve, and a valve body accommodation chamber. The valve body accommodation chamber linearly extends between the cylinder side passage and the switch valve side passage. An on-off valve is located in a vicinity of a first end of the valve body accommodation chamber. The on-off valve defines a first back pressure chamber. A flow control valve is located in a vicinity of a second end that is opposite to the first end. The flow control valve defines a second back pressure chamber. The on-off valve and the flow control valve are separated from each other by a partitioning member.
摘要翻译： 用于单动作气缸的液压控制装置包括用于向缸体供给流体和排出流体的开关阀，连接到气缸的气缸侧通道，连接到开关阀的开关阀侧通道和阀体容置室 。 阀体容纳室在气缸侧通路与开关阀侧通路之间直线延伸。 开关阀位于阀体容纳室的第一端附近。 开关阀限定第一背压室。 流量控制阀位于与第一端相对的第二端附近。 流量控制阀限定第二背压室。 开关阀和流量控制阀通过分隔构件彼此分离。
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3.发明授权公开(公告)号：US07287375B2
公开(公告)日：2007-10-30
申请号：US10465772
申请日：2003-06-19
IPC分类号： F16D31/02
CPC分类号： B66F9/22 , F15B11/165 , F15B2211/20515 , F15B2211/255 , F15B2211/30505 , F15B2211/30525 , F15B2211/3056 , F15B2211/3111 , F15B2211/3144 , F15B2211/31576 , F15B2211/327 , F15B2211/329 , F15B2211/45 , F15B2211/6052 , F15B2211/6055 , F15B2211/615 , F15B2211/6653 , F15B2211/6654 , F15B2211/7135
摘要： A main spool is located in a bypass line connecting a pump line to a return line. The main spool moves in an axial direction according to the pressure in a spring chamber and the pressure in a pilot chamber, thereby adjusting the opening degree of the bypass line. A pilot switching valve is located in a pressure control passage connecting the spring chamber to the return line. The pilot switching valve controls the flow rate of hydraulic oil that flows from the spring chamber to the return line in accordance with the load pressure of a hydraulic actuator, thereby adjusting the pressure of hydraulic oil in the spring chamber. As a result, the range of the flow rate of hydraulic oil supplied to the hydraulic actuator, which range precludes the influence of the load pressure of the hydraulic actuator, is expanded.
摘要翻译： 主阀芯位于将泵管线连接到回流管线的旁路管路中。 主阀芯根据弹簧室内的压力和先导室中的压力沿轴向移动，从而调节旁路管路的开度。 先导换向阀位于将弹簧室连接到回流管线的压力控制通道中。 先导切换阀根据液压致动器的负载压力控制从弹簧室流向返回管路的液压油的流量，从而调节弹簧室中的液压油的压力。 结果，扩大了供给液压致动器的液压油的流量范围，该范围排除了液压致动器的负载压力的影响。
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公开(公告)号：US08109198B2
公开(公告)日：2012-02-07
申请号：US12086042
申请日：2007-03-26
IPC分类号： F16K11/07
CPC分类号： F15B11/0413 , B66F9/22 , E02F9/2203 , E02F9/2225 , E02F9/2267 , F15B11/044 , F15B11/05 , F15B13/0402 , F15B2211/30545 , F15B2211/353 , F15B2211/40561 , F15B2211/47 , F15B2211/473 , F15B2211/7052 , Y10T137/87169
摘要： A hydraulic control apparatus 1 includes a switch valve 11, a valve support chamber 35, a flow control valve 12 movable within the valve support chamber 35, an on-off valve 13 movable within the communication path chamber 12a, and a valve control device 14. The flow control valve 12 has a communication path chamber 12a and a back pressure chamber 12d. The on-off valve 13 is capable of opening and shutting off a communication path X between a cylinder line 32 and a switch valve line 33. A restrictor is formed between the flow control valve 12 and a wall defining the valve support chamber 35. The restrictor connects the cylinder line 32 and the communication path chamber 12a to each other. The opening degree of the restrictor is changed in correspondence with movement of the flow control valve 12. When the switch valve 11 is located at the neutral position or the supply position, the valve control device 14 applies a fluid pressure in the cylinder line 32 to the back pressure chamber 12d for urging the on-off valve 13 in a direction for shutting off the communication path 12a. When the switch valve 11 is located at the drainage position, the valve control device 14 applies a pilot pressure lower than the fluid pressure in the cylinder line 32 to the back pressure chamber 12d, thereby moving the on-off valve 13 in a direction for opening the communication path X.
摘要翻译： 液压控制装置1包括开关阀11，阀支撑室35，可在阀支撑室35内移动的流量控制阀12，可在连通路径室12a内移动的开关阀13以及阀控制装置14 流量控制阀12具有连通路径室12a和背压室12d。 开关阀13能够打开和关闭气缸管线32和切换阀线路33之间的连通路径X.在流量控制阀12和限定阀支撑室35的壁之间形成限流器。 限流器将气缸管线32和连通路径室12a彼此连接。 限制器的开度根据流量控制阀12的移动而改变。当开关阀11位于中立位置或供给位置时，阀控制装置14将气缸管线32中的流体压力施加到 用于在断开连通路径12a的方向上推压开关阀13的背压室12d。 当切换阀11位于排水位置时，阀控制装置14将低于气缸管线32中的流体压力的先导压力施加到背压室12d，从而沿开关阀13向 打开通信路径X.
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公开(公告)号：US08091577B2
公开(公告)日：2012-01-10
申请号：US11667049
申请日：2005-11-08
IPC分类号： G05D11/00
CPC分类号： F16K17/04 , F16K15/026 , Y10T137/2642 , Y10T137/2663 , Y10T137/87499 , Y10T137/87756
摘要： A valve seat 20 is arranged between the supply circuit 8 and a downstream circuit 18. A valve body 21 blocks a fluid flow between the supply circuit 8 and the downstream circuit 18 by contacting the valve seat 20. The valve body 21 connects the supply circuit 8 to the downstream circuit 18 for supplying the fluid to the downstream circuit 18 by separating from the valve seat 20. A through hole 24 extends through the valve body 21 and thus defines a part of the supply circuit 8. The through hole 24 is defined in such a manner that the fluid that has flowed from the through hole 24 proceeds between the valve seat 20 and the valve body 21 and is thus supplied to the downstream circuit 18. The valve body 21 is formed in such a manner that a pressure receiving area at an upstream side of the through hole 24 is smaller than a pressure receiving area at a downstream side of the through hole 24. This reduces a pressure loss caused by the fluid passing through a backflow prevention structure that permits forward fluid flow from the supply circuit 8 to the downstream circuit 18 but prohibits backflow of the fluid.
摘要翻译： 阀座20布置在供应回路8和下游回路18之间。阀体21通过接触阀座20来阻塞供应回路8和下游回路18之间的流体流动。阀体21将供应回路 8到下游回路18，用于通过与阀座20分离将流体供给下游回路18.通孔24延伸穿过阀体21，从而限定供应回路8的一部分。通孔24被限定 使得从通孔24流出的流体在阀座20和阀体21之间进行，并且因此被供给到下游回路18.阀体21形成为使得压力接收 在通孔24的上游侧的区域小于通孔24的下游侧的受压面积。这减小了通过防回流结构体的流体引起的压力损失 在允许从供应回路8流向下游回路18的流体流动，但是禁止流体的回流。
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公开(公告)号：US07882777B2
公开(公告)日：2011-02-08
申请号：US11667043
申请日：2005-11-08
IPC分类号： F15B13/04
CPC分类号： F15B13/0402 , F15B13/0417
摘要： A supply passage, a discharge passage, an actuator passage, and a spool bore are defined in a housing. The spool bore accommodates a spool and communicates with the supply passage, the discharge passage, and the actuator passage. Load pressure detection circuit sections of load pressure detection circuit are provided in correspondence with two switch. Each of the load pressure detection circuit sections detects load pressure when the actuator passage is connected to the supply passage. Each load pressure detection circuit section is defined by a through hole provided in the housing and connected to the spool bore. Check valves are each arranged in a corresponding one of the load pressure detection circuit sections. This simplifies the configuration of each load pressure detection circuit 21 and saves the space for arranging the load pressure detection circuit 21., resulting in a relatively compact housing.
摘要翻译： 供应通道，排放通道，致动器通道和卷轴孔被限定在壳体中。 阀芯孔容纳阀芯并与供给通道，排出通道和致动器通道连通。 负载压力检测电路的负载压力检测电路部分与两个开关相对应设置。 每个负载压力检测电路部分检测到致动器通道连接到供给通道时的负载压力。 每个负载压力检测电路部分由设置在壳体中并连接到滑阀孔的通孔限定。 止回阀各自布置在对应的一个负载压力检测电路部分中。 这简化了每个负载压力检测电路21的配置，并且节省了用于布置负载压力检测电路21的空间，导致相对紧凑的壳体。
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公开(公告)号：US20090242050A1
公开(公告)日：2009-10-01
申请号：US12086042
申请日：2007-03-26
IPC分类号： F15B13/04
CPC分类号： F15B11/0413 , B66F9/22 , E02F9/2203 , E02F9/2225 , E02F9/2267 , F15B11/044 , F15B11/05 , F15B13/0402 , F15B2211/30545 , F15B2211/353 , F15B2211/40561 , F15B2211/47 , F15B2211/473 , F15B2211/7052 , Y10T137/87169
摘要： A hydraulic control apparatus 1 includes a switch valve 11, a valve support chamber 35, a flow control valve 12 movable within the valve support chamber 35, an on-off valve 13 movable within the communication path chamber 12a, and a valve control device 14. The flow control valve 12 has a communication path chamber 12a and a back pressure chamber 12d. The on-off valve 13 is capable of opening and shutting off a communication path X between a cylinder line 32 and a switch valve line 33. A restrictor is formed between the flow control valve 12 and a wall defining the valve support chamber 35. The restrictor connects the cylinder line 32 and the communication path chamber 12a to each other. The opening degree of the restrictor is changed in correspondence with movement of the flow control valve 12. When the switch valve 11 is located at the neutral position or the supply position, the valve control device 14 applies a fluid pressure in the cylinder line 32 to the back pressure chamber 12d for urging the on-off valve 13 in a direction for shutting off the communication path 12a. When the switch valve 11 is located at the drainage position, the valve control device 14 applies a pilot pressure lower than the fluid pressure in the cylinder line 32 to the back pressure chamber 12d, thereby moving the on-off valve 13 in a direction for opening the communication path X.
摘要翻译： 液压控制装置1包括开关阀11，阀支撑室35，可在阀支撑室35内移动的流量控制阀12，可在连通路径室12a内移动的开关阀13以及阀控制装置14 流量控制阀12具有连通路径室12a和背压室12d。 开关阀13能够打开和关闭气缸管线32和切换阀线路33之间的连通路径X.在流量控制阀12和限定阀支撑室35的壁之间形成限流器。 限流器将气缸管线32和连通路径室12a彼此连接。 限制器的开度根据流量控制阀12的移动而改变。当开关阀11位于中立位置或供给位置时，阀控制装置14将气缸管线32中的流体压力施加到 用于在断开连通路径12a的方向上推压开关阀13的背压室12d。 当切换阀11位于排水位置时，阀控制装置14将低于气缸管线32中的流体压力的先导压力施加到背压室12d，从而沿开关阀13向 打开通信路径X.
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公开(公告)号：US20080276993A1
公开(公告)日：2008-11-13
申请号：US11667052
申请日：2005-11-08
CPC分类号： F15B13/022 , F16K11/07 , Y10T137/2605 , Y10T137/265 , Y10T137/2663 , Y10T137/2668 , Y10T137/2688 , Y10T137/8671
摘要： A flow divider includes a spool for distributing fluid from a supply flow path to priority and surplus flow paths. First and second surplus restrictions vary flow rate in accordance with the movement of the spool and restrict the flow rate to the surplus flow path respectively from first and second supply passages. The second surplus restriction is formed to restrict the flow rate in at least two steps. The spool includes a cross-sectional area changing portion located at a position corresponding to the second surplus restriction. Therefore, the circuit structure is prevented from becoming complicated and the fluid force acting as a spool urging force is suppressed.
摘要翻译： 分流器包括用于将流体从供给流路分配到优先级和多余流路的阀芯。 第一和第二剩余限制根据阀芯的运动而改变流量，并且将流量分别从第一和第二供给通道限制到多余流路。 形成第二剩余限制以在至少两个步骤中限制流量。 卷轴包括位于对应于第二剩余限制的位置的横截面变化部分。 因此，防止电路结构变得复杂，并且抑制作为卷筒推动力的流体力被抑制。
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公开(公告)号：US6164415A
公开(公告)日：2000-12-26
申请号：US44893
申请日：1998-03-20
IPC分类号： B66F9/22
CPC分类号： B66F9/22
摘要： A lift control valve is switched based on the manipulation of a lift lever, so that a lift cylinder extends or retracts to move a fork, supported on a mast, to move up or down. A check valve, which is actuated with a pilot pressure, is placed between the lift control valve and the lift cylinder. A pilot pipe led out from a pipe directly coupled to an oil tank is connected to a port of the check valve. A tilt control valve is switched based on the manipulation of a tilt lever, so that a tilt cylinder extends or retracts to tilt the mast. An electromagnetic valve is disposed between the tilt cylinder and the tilt control valve. When values necessary to drive the fork are detected, a controller control the electromagnetic valve based on those values.
摘要翻译： 基于提升杆的操纵来切换升降控制阀，使得提升缸延伸或缩回以移动支撑在桅杆上的叉，以向上或向下移动。 在先导压力下启动的止回阀被放置在升降控制阀和提升缸之间。 从直接连接到油箱的管道引出的先导管连接到止回阀的端口。 基于倾斜杆的操纵来切换倾斜控制阀，使得倾斜缸延伸或缩回以使桅杆倾斜。 在倾斜缸和倾斜控制阀之间设置电磁阀。 当检测到驱动叉子所需的值时，控制器基于这些值来控制电磁阀。
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公开(公告)号：US07784494B2
公开(公告)日：2010-08-31
申请号：US11667052
申请日：2005-11-08
IPC分类号： F16K11/07
CPC分类号： F15B13/022 , F16K11/07 , Y10T137/2605 , Y10T137/265 , Y10T137/2663 , Y10T137/2668 , Y10T137/2688 , Y10T137/8671
摘要： A flow divider includes a spool for distributing fluid from a supply flow path to priority and surplus flow paths. First and second surplus restrictions vary flow rate in accordance with the movement of the spool and restrict the flow rate to the surplus flow path respectively from first and second supply passages. The second surplus restriction is formed to restrict the flow rate in at least two steps. The spool includes a cross-sectional area changing portion located at a position corresponding to the second surplus restriction. Therefore, the circuit structure is prevented from becoming complicated and the fluid force acting as a spool urging force is suppressed.
摘要翻译： 分流器包括用于将流体从供给流路分配到优先级和多余流路的阀芯。 第一和第二剩余限制根据阀芯的运动而改变流量，并且将流量分别从第一和第二供给通道限制到多余流路。 形成第二剩余限制以在至少两个步骤中限制流量。 卷轴包括位于对应于第二剩余限制的位置的横截面变化部分。 因此，防止电路结构变得复杂，并且抑制作为卷筒推动力的流体力被抑制。
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