专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

91. 发明授权

US4967557A Control system for load-sensing hydraulic drive circuit 失效
标题翻译：负载传感液压驱动电路控制系统
公开(公告)号：US4967557A
公开(公告)日：1990-11-06
申请号：US301718
申请日：1989-01-26
申请人： Eiki Izumi , Yasuo Tanaka , Hiroshi Watanabe , Kuniaki Yoshida , Toichi Hirata
发明人： Eiki Izumi , Yasuo Tanaka , Hiroshi Watanabe , Kuniaki Yoshida , Toichi Hirata
IPC分类号： F15B11/00 , E02F9/20 , E02F9/22 , F02D29/04 , F15B11/05 , F15B11/16 , F15B21/08
CPC分类号： E02F9/2025 , E02F9/2228 , E02F9/2235 , E02F9/2246 , E02F9/2292 , E02F9/2296 , F02D29/04 , F15B11/165 , F15B21/087 , F15B2211/20553 , F15B2211/255 , F15B2211/30505 , F15B2211/30535 , F15B2211/3111 , F15B2211/31576 , F15B2211/329 , F15B2211/6054 , F15B2211/6309 , F15B2211/6313 , F15B2211/633 , F15B2211/6333 , F15B2211/634 , F15B2211/6346 , F15B2211/6355 , F15B2211/7053 , F15B2211/71
摘要： Control system for a load-sensing hydraulic drive circuit comprising; at least one hydraulic pump; hydraulic actuators driven by the hydraulic pump; and a pressure compensated flow control valve between the pump and each of the actuators, for controlling a flow rate of fluid to each actuator in response to a control signal. The control system has first detection means for detecting a differential pressure between the pump delivery pressure and the maximum load pressure; second detection means for detecting the pump delivery pressure; first means for calculating a differential pressure target pump delivery amount Q.DELTA.p to hold the differential pressure constant; second means for calculating an input limiting target pump delivery amount QT based on at least a pressure signal from the second detection means and an input limiting pump function; third means for selecting one of the differential pressure target delivery amount Q.DELTA.p and the input limiting target delivery amount QT as a pump delivery amount target value Qo, and then controlling the pump delivery amount to not exceed the input amount QT; and fourth means for calculating a compensation value Qns to limit a total consumable actuator flow rate based on at least the input amount QT and the differential pressure target delivery amount Q.DELTA.p when the input amount QT is selected by the third means, and then controlling the pressure compensated flow control valve based on the compensation valve Qns.

92. 发明授权

US4955344A Apparatus for controlling rotational speed of prime mover of construction machine 失效
标题翻译：用于控制施工机械原动机转速的装置
公开(公告)号：US4955344A
公开(公告)日：1990-09-11
申请号：US374836
申请日：1989-07-03
申请人： Akira Tatsumi , Toichi Hirata , Masaki Egashira , Osamu Tomikawa , Hiroshi Watanabe
发明人： Akira Tatsumi , Toichi Hirata , Masaki Egashira , Osamu Tomikawa , Hiroshi Watanabe
IPC分类号： E02F9/20 , E02F9/22 , F02D29/00 , F02D29/04 , F02D41/04 , F02D45/00
CPC分类号： F02D29/04 , E02F9/2025 , E02F9/2246 , E02F9/2296
摘要： A controller having an up/down switch for changing the rotational speed of a prime mover such as an engine, an actuator such as an electric motor for driving a governor on the basis of the operation of the up/down switch so as to control the rotational speed of the prime mover. A target speed is calculated on the basis of the operation of the up/down switch, and the prime mover speed is controlled by using the calculated value. Another switch is provided to immediately shift the prime mover speed to a speed previously set as desired. This shift switch is used to control the prime mover so that the prime mover rotates at the set speed, and this speed is adjusted by operating the up/down switch.

93. 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).

94. 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。

95. 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。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式