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91. 发明授权

US5447027A Hydraulic drive system for hydraulic working machines 失效
标题翻译：液压工程机液压驱动系统
公开(公告)号：US5447027A
公开(公告)日：1995-09-05
申请号：US302786
申请日：1994-09-12
申请人： Koji Ishikawa , Toichi Hirata , Genroku Sugiyama
发明人： Koji Ishikawa , Toichi Hirata , Genroku Sugiyama
IPC分类号： E02F9/22 , F15B11/04 , F15B11/05 , F16D31/02
CPC分类号： E02F9/2285 , E02F9/2225 , E02F9/2235 , E02F9/2282 , E02F9/2296 , F15B11/04 , F15B11/05 , F15B2211/20553 , F15B2211/255 , F15B2211/30505 , F15B2211/3116 , F15B2211/329 , F15B2211/351 , F15B2211/353 , F15B2211/615 , F15B2211/6309 , F15B2211/6313 , F15B2211/6316 , F15B2211/6326 , F15B2211/633 , F15B2211/6333 , F15B2211/6355 , F15B2211/7053 , F15B2211/71
摘要： A hydraulic drive system comprises a controller (12) and several condition sensors. A boom-up target flow rate setting section determines a boom-up target flow rate based on signals from a pressure sensor (11) and a rotational speed meter (16), a pump delivery rate detecting section determines a pump delivery rate based on signals from a tilt angle sensor (15) and the rotational speed meter (16), a differential pressure detecting section and a center bypass flow rate calculating section determine a center bypass flow rate based on signals from pressure sensors (9, 10), a boom cylinder calculating section determines a boom cylinder flow rate from the pump delivery rate and the center bypass flow rate, and a first pump target displacement volume calculating section calculates a first pump target tilt angle .theta..sub.1 in accordance with the difference between the boom-up target flow rate and the boom cylinder flow rate. In this case, .theta..sub.1 is larger than a second pump target tilt angle .theta..sub.2 for negative control and is selected by a maximum value selecting section. Then, a minimum value selecting section selects the smaller one of .theta..sub.1 and a maximum tilt angle .theta..sub.max determined with horsepower control, and drive signal generating section outputs a corresponding target current to a solenoid proportional valve (13) for driving a piston (6a) of a regulator (6) to the right in FIG. 4.
摘要翻译： PCT No.PCT / JP94 / 00464 Sec。 371日期1994年9月12日 102（e）1994年9月12日PCT PCT 1994年3月23日PCT公布。出版物WO94 / 21925 日期1994年9月29日。液压驱动系统包括控制器（12）和几个状态传感器。动臂上升目标流量设定部基于来自压力传感器（11）和转速计（16）的信号来确定动臂上升目标流量，泵输送速度检测部基于信号来确定泵输送速度从倾斜角传感器（15）和转速计（16），差压检测部和中心旁通流量计算部基于来自压力传感器（9,10），吊杆（9,10）的信号来确定中心旁通流量气缸计算部根据泵输送速度和中心旁通流量来确定起重臂液压缸流量，第一泵目标排量体积计算部根据悬臂上升目标的差计算第一泵目标倾斜角θ1 流量和动臂缸流量。在这种情况下，θ1大于用于负控制的第二泵目标倾斜角θ2，并且由最大值选择部选择。然后，最小值选择部选择通过马力控制确定的θ1中的较小值和最大倾斜角θmax，驱动信号生成部将用于驱动活塞（6a）的电磁比例阀（13）输出对应的目标电流）在图1中右侧的调节器（6）。 4。

92. 发明授权

US5203678A Valve apparatus and hydraulic drive system 失效
标题翻译：阀门装置和液压驱动系统
公开(公告)号：US5203678A
公开(公告)日：1993-04-20
申请号：US655368
申请日：1991-02-28
申请人： Genroku Sugiyama , Toichi Hirata , Yusuke Kajita
发明人： Genroku Sugiyama , Toichi Hirata , Yusuke Kajita
IPC分类号： E02F9/22 , F15B13/04
CPC分类号： E02F9/2232 , E02F9/2296 , F15B13/0417 , Y10T137/87185
摘要： A valve apparatus has a flow control valve having a supply passage communicating with a hydraulic fluid supply source, a load passage communicating with an actuator, and a first meter-in variable restrictor disposed between the supply passage and the load passage and opened dependent on an operation amount there; a first signal passage located downstream of the first variable restrictor and having a passage section for detecting load pressure of the actuator; a tank passage communicating with a reservoir tank; a discharge passage for communicating the first signal passage with the tank passage; and a second variable restrictor provided in the discharge passage and having its opening variable dependent on the operation amount of the flow control valve to produce in the first signal passage a control pressure different from the load pressure, the control pressure in the first signal passage being led to the hydraulic fluid supply source though a second signal passage. An auxiliary restrictor is disposed in the first signal passage to reduce the load pressure detected in the passage section of the first signal passage so that a pressure lower than the detected load pressure is produced in the first signal passage as the control pressure.
摘要翻译： PCT No.PCT / JP90 / 01407 Sec。 371日期1991年2月28日 102（e）日期1991年2月28日PCT 1990年11月1日PCT PCT。公开号WO91 / 10833 日期：1991年7月25日。一种阀装置具有流量控制阀，该流量控制阀具有与液压流体供给源连通的供给通道，与致动器连通的负载通道，以及设置在供给通道和负载通道和开启取决于操作量; 第一信号通道，位于第一可变节流器的下游，并具有用于检测致动器的负载压力的通道部分; 与储罐连通的罐通道; 用于使第一信号通道与油箱通道连通的排出通道; 以及第二可变节流器，其设置在所述排出通道中，其开口变化取决于所述流量控制阀的操作量，以在所述第一信号通道中产生与所述负载压力不同的控制压力，所述第一信号通道中的控制压力为通过第二个信号通道导致液压流体供应源。辅助限制器设置在第一信号通道中以减小在第一信号通道的通道部分中检测到的负载压力，使得在第一信号通道中产生低于检测到的负载压力的压力作为控制压力。

93. 发明授权

US5161575A Direction selector valve having load-sensing function 失效
标题翻译：方向选择阀具有负载感应功能
公开(公告)号：US5161575A
公开(公告)日：1992-11-10
申请号：US717537
申请日：1991-06-19
申请人： Rindo Morikawa , Kiyoshi Oyama , Toichi Hirata , Yusuke Kajita , Genroku Sugiyama
发明人： Rindo Morikawa , Kiyoshi Oyama , Toichi Hirata , Yusuke Kajita , Genroku Sugiyama
IPC分类号： E02F9/22 , F15B11/00 , F15B11/05 , F15B11/16 , F15B13/04 , F16K11/07
CPC分类号： F15B13/0417 , Y10T137/86702 , Y10T137/87169 , Y10T137/87185
摘要： There is disclosed a direction selector valve having function of detecting load. The valve is used in a hydraulic system. A spool has two passage holes extending axially partially through the spool from both side ends. These two passage holes have their respective high-pressure holes. When the spool is in its neutral position, the high-pressure holes are closed off by spool hole walls between bridge ports and actuator ports. The two passage holes further include low-pressure holes which are in communication with tank ports via load check valves mounted in the passage holes, respectively. Guide holes are formed near the front end of one passage hole and in communication with a load-sensing port. A restriction portion is formed on the outer surface of the spool adjacently to the guide holes to control the flow from the load-sensing port to the tank ports. First guide holes and second guide holes which are close to each other are formed near the front end of the other passage hole. The first guide holes are in communication with the load-sensing port even when the spool is in its neutral position. The second guide holes are placed in communication with the load-sensing port after the spool has shifted from its neutral position, connecting the high-pressure holes with the bridge ports. This structure smoothly responds to the load pressure in the actuator.
摘要翻译：公开了一种具有检测负载功能的方向选择阀。阀门用于液压系统。阀芯具有从两侧端部轴向部分地穿过阀芯延伸的两个通道孔。这两个通孔具有各自的高压孔。当阀芯处于其中性位置时，高压孔由桥接口和执行器端口之间的阀芯孔封闭。两个通道孔还包括分别通过安装在通孔中的负载止回阀与罐口连通的低压孔。在一个通孔的前端附近形成导向孔，并与负载传感端口连通。限制部分形成在与引导孔相邻的卷轴的外表面上，以控制从负载感测端口到罐口的流动。在另一个通孔的前端附近形成彼此靠近的第一导向孔和第二引导孔。即使当阀芯处于其中立位置时，第一引导孔也与负载感测端口连通。在阀芯已经从其中立位置移动之后，第二引导孔与负载感测端口连通，将高压孔与桥接口连接。该结构平滑地响应致动器中的负载压力。

94. 发明授权

US5161373A Hydraulic control valve system 失效
标题翻译：液压控制阀系统
公开(公告)号：US5161373A
公开(公告)日：1992-11-10
申请号：US717532
申请日：1991-06-19
申请人： Rindo Morikawa , Yusuke Kajita , Genroku Sugiyama
发明人： Rindo Morikawa , Yusuke Kajita , Genroku Sugiyama
IPC分类号： F15B11/05 , F15B11/16 , F15B13/04 , F15B21/08
CPC分类号： F15B13/0402 , F15B11/163 , F15B13/0417 , F15B21/08 , F15B2211/20553 , F15B2211/30535 , F15B2211/3111 , F15B2211/57 , F15B2211/6054 , F15B2211/6055 , F15B2211/6355 , F15B2211/71
摘要： Disclosed is a hydraulic control valve system, for driving a plurality of hydraulic actuators by a single pump, including pressure compensation valves and a shuttle valve disposed in a vertical bore orthogonal to a lateral bore of a valve body, into which a spool of a direction switching valve is fitted. A load sensing chamber for introducing a load pressure of an actuator is formed at an intersection between the lateral bore and the vertical bore. An opening-side first pressure receiving surface of the pressure compensation valve confronts the load sensing chamber. The pressure compensation valve has an opening-side second pressure receiving surface contacting a pilot pressure in the vicinity of the opening-side first pressure receiving surface. Formed on the upper side of the pressure compensation valve are a closing-side first pressure receiving surface on which a bridge pressure acts and a closing-side first pressure receiving surface on which an external control pressure acts. The pressure compensation valve incorporates a throttle check valve working as a resistance at a descending time upon receiving a closing-side pressure in a region of the opening-side first pressure receiving surface.
摘要翻译：公开了一种用于通过单个泵驱动多个液压致动器的液压控制阀系统，包括压力补偿阀和布置在垂直于阀体的侧孔的垂直孔中的梭阀，其中方向的阀芯安装开关阀。用于引入致动器的负载压力的负载感测室形成在侧向孔和垂直孔之间的交叉处。压力补偿阀的开口侧的第一压力接收表面面对负载感测室。压力补偿阀具有接触开口侧第一受压面附近的先导压力的开口侧第二受压面。在压力补偿阀的上侧形成有桥接压力作用的封闭侧第一受压面和作用外部控制压力的封闭侧第一受压面。压力补偿阀包括在接收开口侧第一压力接收表面的区域中的闭合侧压力时在下降时间作为电阻工作的节气门止回阀。

95. 发明授权

US5150574A Hydraulic drive system for civil engineering and construction machine 失效
标题翻译：公路工程施工机械液压驱动系统
公开(公告)号：US5150574A
公开(公告)日：1992-09-29
申请号：US573138
申请日：1990-09-24
申请人： Toichi Hirata , Hideaki Tanaka , Genroku Sugiyama , Yusuke Kajita
发明人： Toichi Hirata , Hideaki Tanaka , Genroku Sugiyama , Yusuke Kajita
IPC分类号： E02F9/22 , F15B13/04
CPC分类号： F15B13/0417 , E02F9/2232 , E02F9/2296
摘要： A hydraulic drive system for a construction machine has a flow control valve (5) disposed between a hydraulic pump and an acutator, a pressure compensating valve for controlling a differential pressure across the flow control valve, and a pump delivery rate regulator for controlling a flow rate of the hydraulic fluid delivered from the hydraulic pump dependent on a differential pressure (Pd-PLS) between a pump pressure and a load pressure of the actuator. The pressure compensating valve has a valve body subjected to control forces. A first control force based on the differential pressure across the flow control valve to the valve body urges the valve body in the valve-closing direction. A second predetermined control force urges the valve body in the valve-operating direction; and a third control force based on the differential pressure (Pd-PLS) between the pump pressure and the load pressure of the actuator urges the valve body in the valve-opening direction.
摘要翻译： PCT No.PCT / JP90 / 00573 Sec。 371 1990年9月24日第 102（e）1990年9月24日PCT PCT 1990年5月1日PCT公布。 WO90 / 13748 PCT公开日本1990年11月15日。一种用于建筑机械的液压驱动系统具有设置在液压泵和辅助器之间的流量控制阀（5），用于控制流量控制阀两端的压差的压力补偿阀，以及泵输送速率调节器，用于根据泵压力和致动器的负载压力之间的差压（Pd-PLS）控制从液压泵输送的液压流体的流量。压力补偿阀具有经受控制力的阀体。基于流量控制阀与阀体两端的差压的第一控制力在阀关闭方向上推动阀体。第二预定控制力促使阀体处于阀操作方向; 并且基于泵压力和致动器的负载压力之间的差压（Pd-PLS）的第三控制力促使阀体沿阀打开方向。

96. 发明授权

US5005358A Hydraulic drive system for crawler-mounted construction vehicle 失效
标题翻译：用于履带式施工车辆的液压驱动系统
公开(公告)号：US5005358A
公开(公告)日：1991-04-09
申请号：US349851
申请日：1989-05-10
申请人： Toichi Hirata , Hideaki Tanaka , Genroku Sugiyama , Yusuke Kajita
发明人： Toichi Hirata , Hideaki Tanaka , Genroku Sugiyama , Yusuke Kajita
IPC分类号： B62D11/04 , B62D11/18 , E02F9/22 , F15B11/16 , F15B13/04 , F16H61/456
CPC分类号： E02F9/225 , B62D11/18 , E02F9/2296 , F15B11/165 , F15B13/0417 , F15B2211/20553 , F15B2211/253 , F15B2211/30515 , F15B2211/30535 , F15B2211/3111 , F15B2211/329 , F15B2211/351 , F15B2211/40515 , F15B2211/40569 , F15B2211/41581 , F15B2211/4159 , F15B2211/428 , F15B2211/45 , F15B2211/46 , F15B2211/5059 , F15B2211/6052 , F15B2211/6054 , F15B2211/6058 , F15B2211/6355 , F15B2211/7058 , F15B2211/71
摘要： A hydraulic drive system for a crawler-mounted construction vehicle includes: a hydraulic pump (1); a plurality of hydraulic actuators including traveling hydraulic motors (2, 3) driven by the hydraulic pump; a plurality of flow control valve means including first and second flow control valve means (15, 16; 35, 36) for respectively controlling the flow rates of the hydraulic fluid supplied from the pump to motors; pump controlling means (11) for effecting control during the driving of the motors in such a manner that the discharge pressure of the pump becomes higher by a fixed value than the higher one of load pressures of the motors; and first and second pressure balance valve means (17, 18; 37, 38) for respectively controlling the rates of flow through the flow control valve means during the driving of the motors in such a manner that the load pressures of the motors do not affect the rates of flow through the first and second flow control valve means. The first and second pressure balance valve means (17, 18; 37, 38) are respectively provided with valve control means (62, 63; 66, 67 ) which do not cause the associated pressure balance valve means to be actuated until the differential pressure between the load pressure generated in a first motor (2) and the load pressure generated in a second motor (3) reaches a predetermined value (.DELTA.P.sub.0), and causes the pressure balance valve means to be actuated when the differential pressure exceeds the predetermined value.

97. 发明授权

US4858649A Valve apparatus 失效
标题翻译：阀门装置
公开(公告)号：US4858649A
公开(公告)日：1989-08-22
申请号：US221509
申请日：1988-04-29
申请人： Shinichi Satoh , Toichi Hirata , Genroku Sugiyama , Hideaki Tanaka
发明人： Shinichi Satoh , Toichi Hirata , Genroku Sugiyama , Hideaki Tanaka
IPC分类号： F15B13/042
CPC分类号： F15B13/0422 , Y10T137/86582 , Y10T137/86606
摘要： A valve apparatus (1; 50; 60, 61; 90; 100) in which at least one flow control valve (21, 22; 63, 76; 101) is incorporated in a body block (20; 62, 82), and the flow control valve is connected in pilot lines (6-9) which connect a pilot valve (2) supplied with a pilot hydraulic fluid of a predetermined pressure set by a relief valve (19) and a pilot operated directional control valve (3) actuated in response to operation of the pilot valve, to permit free flow of the hydraulic fluid from the pilot valve to the directional control valve, but to restrict flow of the hydraulic fluid from the directional control valve to the pilot valve. The body block (20; 62, 82) is formed therein with a first passage (31; 52; 68, 81) connected to a return line (14; 71, 72, 86) for the relief valve (19).

98. 发明授权

US4753158A Pilot hydraulic system for operating directional control valve 失效
标题翻译：用于操作方向控制阀的先导液压系统
公开(公告)号：US4753158A
公开(公告)日：1988-06-28
申请号：US904119
申请日：1986-09-05
申请人： Toichi Hirata , Genroku Sugiyama , Shinichi Satoh
发明人： Toichi Hirata , Genroku Sugiyama , Shinichi Satoh
IPC分类号： E02F9/22 , F15B13/042 , F15B9/08
CPC分类号： E02F9/2285 , F15B13/0422
摘要： A pilot hydraulic system comprises a directional control valve having at least one pilot chamber for controlling the operation of a hydraulic actuator; and a pilot valve connected through a pilot line to the pilot chamber of the directional control valve for operation thereof. The pilot line includes a flow control valve which allows a free flow of hydraulic fluid from the pilot valve to the directional control valve while limiting a flow of hydraulic fluid from the directional control valve to the pilot valve.
摘要翻译：一个先导液压系统包括方向控制阀，该方向控制阀具有用于控制液压致动器操作的至少一个先导室; 以及通过先导管路连接到方向控制阀的先导室的先导阀，用于操作。先导管路包括流量控制阀，其允许液压流体从先导阀自由流动到方向控制阀，同时限制液压流体从方向控制阀到先导阀的流动。

99. 发明授权

US4697418A Control system for hydraulically-operated construction machinery 失效
标题翻译：液压施工机械控制系统
公开(公告)号：US4697418A
公开(公告)日：1987-10-06
申请号：US904118
申请日：1986-09-05
申请人： Nobuya Okabe , Toichi Hirata , Kuniaki Yoshida , Genroku Sugiyama , Masakazu Haga , Hideaki Tanaka , Akira Tatsumi
发明人： Nobuya Okabe , Toichi Hirata , Kuniaki Yoshida , Genroku Sugiyama , Masakazu Haga , Hideaki Tanaka , Akira Tatsumi
IPC分类号： E02F9/22 , E02F9/20 , F15B9/04
CPC分类号： E02F9/2246 , B60W10/06 , B60W10/30 , B60W30/188 , E02F9/2235 , E02F9/2282 , E02F9/2292 , E02F9/2296 , B60W2300/17 , B60W2510/0638 , B60W2510/30 , B60W2540/04 , B60W2710/0644 , B60W2710/30
摘要： A control system for a hydraulic excavator having a prime mover, revolution number control device for the prime mover, at least one variable displacement hydraulic pump driven by the prime mover, displacement volume control device for the pump, actuators driven by pressurized fluid discharged from the pump and working elements driven by the respective actuators. The control system includes maximum revolution number altering device for the prime mover associated with the revolution number control device, maximum displacement volume altering device for the pump associated with the displacement volume control devices, devices for sensing the operation condition of the actuators, devices for selecting an operation mode for each working element and control devices. The maximum revolution number altering device provides at least one maximum revolution number of the prime mover and the maximum displacement volume altering device provides at least one maximum displacement volume so that maximum revolution numbers of the prime mover and maximum displacement volumes are arranged in a plurality of combinations. The plurality of combinations are set in association with the operation condition of the actuators and the selection of the operation mode. The control means selects a combination of the maximum revolution number of the prime mover and the maximum displacement volume of the pumps on basis of output signals of the sensors and selection devices and drives the maximum revolution number altering device and the maximum displacement volume altering device to set the maximum revolution number of the prime mover and the maximum displacement volume of the hydraulic pump.
摘要翻译：一种用于液压挖掘机的控制系统，具有用于原动机的原动机，转数控制装置，由原动机驱动的至少一个可变排量液压泵，用于泵的排量体积控制装置，由从泵和工作元件由相应的致动器驱动。控制系统包括与转数控制装置相关联的原动机的最大转数改变装置，与排量体积控制装置相关联的泵的最大排量变化装置，用于感测致动器的操作状态的装置，用于选择的装置每个工作元件和控制装置的操作模式。最大转数改变装置提供原动机的至少一个最大转速，并且最大排量改变装置提供至少一个最大排量，使得原动机和最大排量的最大转数排列成多个组合。多个组合与致动器的操作条件和操作模式的选择相关联地设置。控制装置基于传感器和选择装置的输出信号选择原动机的最大转数与泵的最大排量之间的组合，并将最大转数改变装置和最大排量变更装置驱动到设定原动机的最大转数和液压泵的最大排量。

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