-
公开(公告)号：US5701691A
公开(公告)日：1997-12-30
申请号：US596103
申请日：1996-01-31
申请人： Hiroshi Watanabe , Toichi Hirata , Masakazu Haga , Eiji Yamagata , Kazuo Fujishima , Hiroyuki Adachi
发明人： Hiroshi Watanabe , Toichi Hirata , Masakazu Haga , Eiji Yamagata , Kazuo Fujishima , Hiroyuki Adachi
CPC分类号： E02F9/2033 , E02F3/435
摘要： In an excavation area limiting control system for a construction machine for limitingly controlling an area to be excavated, a region where a front device 1A is movable is set beforehand. The position and posture of the front device are calculated based on signals from angle sensors 8a-8c, and a target speed vector of the front device is calculated based on detection signals from control lever units and load pressures detected by pressure sensors 270a to 271b. The target speed vector is modified so that a vector component of the target speed vector in the direction toward the boundary of the set region is reduced when the front device is within the set region near the boundary thereof, and the front device is returned to the set region when the front device is outside the set region. Control signals corresponding to the modified target speed vector are further modified depending on the load pressures and output to proportional solenoid valves 210a to 211b. As a result, the excavation within a limited area can be implemented efficiently and smoothly, and stable control is achieved with good accuracy regardless of change in the load pressures of hydraulic actuators.
摘要翻译： PCT No.PCT / JP95 / 01053 Sec。 371日期1996年1月31日 102（e）日期1996年1月31日PCT提交1995年5月31日PCT公布。 第WO95 / 33100号公报 日期1995年12月7日在用于限制要开挖区域的施工机械的挖掘区域限制控制系统中，预先设置前置装置1A可移动的区域。 基于来自角度传感器8a-8c的信号计算前部装置的位置和姿势，并且基于来自控制杆单元的检测信号和由压力传感器270a至271b检测的负载压力来计算前部装置的目标速度矢量。 目标速度矢量被修改为当前置装置位于其边界附近的设定区域内时，目标速度矢量朝向设定区域的边界方向的矢量分量减小，并且前置装置返回到 当前置设备在设定区域之外时，设置区域。 对应于修改的目标速度矢量的控制信号根据负载压力进一步修改并输出到比例电磁阀210a至211b。 结果，可以有效地平稳地实施有限区域内的挖掘，而且与液压致动器的负载压力的变化无关地实现高精度的稳定的控制。
-
72.发明授权Excavation area setting system for area limiting excavation control in construction machines 失效施工机械区域限制开挖控制挖掘区设定系统
公开(公告)号：US5960378A
公开(公告)日：1999-09-28
申请号：US776007
申请日：1997-01-16
CPC分类号： E02F3/437 , E02F3/32 , E02F9/2285 , E02F9/2296 , E02F9/26
摘要： An excavation area setting system for area limiting excavation control in construction machines, with the excavation control being performed to calculate a target speed vector for control of a front device on the basis of a body, modify the target speed vector to limit a moving speed of the front device in the direction toward a boundary of a preset excavation area when the front device comes close to the boundary of the excavation area, and move the front device along the boundary of the excavation area. To set the excavation area, an external reference is installed horizontally outside the hydraulic excavator and a depth from the external reference to the boundary of the excavation area is set by using a setting device. The excavation area is set in a manner matched with the excavation control in which calculation is executed based on the position of the body.
摘要翻译： 一种用于施工机械中的区域限制挖掘控制的挖掘区域设定系统，进行挖掘控制以计算用于基于身体控制前方装置的目标速度矢量，修改目标速度矢量以限制目标速度向量的移动速度 当前部装置靠近挖掘区域的边界时，该前部装置朝向预定挖掘区域的边界方向，并且沿着挖掘区域的边界移动前部装置。 为了设置挖掘区域，在液压挖掘机外部水平地安装外部基准，并且通过使用设定装置来设定从外部参照到挖掘区域的边界的深度。 挖掘区域以与基于身体的位置执行计算的挖掘控制相配合的方式设定。
-
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
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.
-
74.发明授权
公开(公告)号：US4955344A
公开(公告)日：1990-09-11
申请号：US374836
申请日：1989-07-03
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.
-
公开(公告)号：US5168705A
公开(公告)日：1992-12-08
申请号：US661600
申请日：1991-02-28
CPC分类号： E02F9/2232 , Y10T137/87185
摘要： A flow control valve has a first variable restrictor to control a flow rate of a hydraulic fluid supplied from a hydraulic fluid supply line to a hydraulic actuator and a second variable restrictor to control a flow rate of the hydraulic fluid discharged from the hydraulic actuator to a hydraulic fluid return line. A pressure compensating valve holds constant a differential pressure across the first variable restrictor, and a recovery circuit having a recovery line has a check valve that allows flow of the hydraulic fluid only toward the supply line. The recovery circuit receives at least part of the hydraulic fluid discharged from the hydraulic actuator and returns it to the supply line at a portion between the pressure compensating valve and the first variable restrictor through the recovery line upon controlling of the discharged flow rate by the second variable restrictor to thereby recover the discharged hydraulic fluid. A third variable restrictor disposed in the return line at a portion downstream of the second variable restrictor controls the recovery pressure of the hydraulic fluid returned to the supply line, and its restriction amount is changed dependent upon an input amount of the flow rate control valve.
-
公开(公告)号：USD437602S1
公开(公告)日：2001-02-13
申请号：US29106979
申请日：1999-06-28
-
77.发明授权
公开(公告)号：US5048296A
公开(公告)日：1991-09-17
申请号：US463300
申请日：1990-01-09
申请人： Kazuhiro Sunamura , Osamu Tomikawa , Toichi Hirata
发明人： Kazuhiro Sunamura , Osamu Tomikawa , Toichi Hirata
CPC分类号： F15B1/021 , E02F3/43 , E02F9/2207
摘要： A working machine such as a hydraulic excavator is provided with a working apparatus including a boom pivotally mounted on the body of the working apparatus and a boom-cylinder hydraulic system for the working apparatus. The hydraulic system includes an actuator for moving the boom up and down and a directional selecting valve. The directional selecting valve is arranged to effect selective switching of the feed of a pressurized working fluid to and the discharge of the working fluid from with respect to the rod-side and the bottom-side hydraulic chamber. The hydraulic system further includes a device for relieving the pressure of the bottom-side hydraulic chamber of the actuator. This relieving device is connected to the bottom-side hydraulic chamber of the actuator via a hydraulic circuit. When the pressure in the bottom-side hydraulic chamber changes from rise to fall, the pressure is released to a low-pressure side of the hydraulic circuit, thereby suppressing oscillation of the boom.
-
公开(公告)号：US20050071064A1
公开(公告)日：2005-03-31
申请号：US10500032
申请日：2003-08-25
申请人： Kazunori Nakamura , Toichi Hirata , Yasushi Arai , Yoichi Kowatari , Gen Yasuda , Hiroshi Watanabe
发明人： Kazunori Nakamura , Toichi Hirata , Yasushi Arai , Yoichi Kowatari , Gen Yasuda , Hiroshi Watanabe
CPC分类号： F02D29/04 , F04B17/05 , F04B49/002 , F04B49/065 , F04B2201/1202 , F15B11/165 , F15B11/167 , F15B2211/20523 , F15B2211/20553 , F15B2211/20584 , F15B2211/30505 , F15B2211/30525 , F15B2211/3056 , F15B2211/3116 , F15B2211/31576 , F15B2211/329 , F15B2211/50536 , F15B2211/50563 , F15B2211/575 , F15B2211/6054 , F15B2211/63 , F15B2211/6355 , F15B2211/66 , F15B2211/71 , F15B2211/865 , F15B2211/88
摘要： A machine body controller 70A includes a modification control unit 70Ab for computing a torque modification value based on detected signals from environment sensors 75 to 83, and modifies a maximum absorption torque of a hydraulic pump controlled by a basic control unit 70Aa. An engine controller 70B includes a modification control unit 70Bb for computing an injection modification value based on detected the signals from the environment sensors 75 to 83, and modifies a fuel injection state of a fuel injection device 14 controlled by a basic control unit 70Ba. The controllers 70A, 70B further include computation element altering units 171, 181. A communication controller 70C downloads alteration data obtained from an external terminal 150 to the computation element altering units 171, 181, whereby corresponding computation elements contained in the modification control units 70Ab, 70Bb are altered.
摘要翻译： 机体控制器70A包括：修改控制单元70Ab，用于基于来自环境传感器75至83的检测信号计算扭矩修正值，并修改由基本控制单元70Aa控制的液压泵的最大吸收扭矩。 发动机控制器70B包括用于基于检测到来自环境传感器75至83的信号来计算喷射修改值的修改控制单元70Bb，并且修改由基本控制单元70Ba控制的燃料喷射装置14的燃料喷射状态。 控制器70A，70B还包括计算元件改变单元171,181。通信控制器70C将从外部终端150获得的改变数据下载到计算元件改变单元171,181，由此包含在修改控制单元70Ab中的对应的计算元素， 70Bb被改变。
-
公开(公告)号：US5394697A
公开(公告)日：1995-03-07
申请号：US130906
申请日：1993-10-04
申请人： Toichi Hirata
发明人： Toichi Hirata
CPC分类号： E02F9/2296 , E02F9/2235 , F15B11/165 , F15B21/087 , F15B2211/20553 , F15B2211/20584 , F15B2211/30525 , F15B2211/3111 , F15B2211/31576 , F15B2211/327 , F15B2211/329 , F15B2211/351 , F15B2211/40515 , F15B2211/41563 , F15B2211/428 , F15B2211/45 , F15B2211/50536 , F15B2211/528 , F15B2211/6054 , F15B2211/6346 , F15B2211/6355
摘要： An unloading valve is connected to a hydraulic pump, the unloading valve being opened when a differential pressure between a delivery pressure of the hydraulic pump and a maximum load pressure exceeds a predetermined value, for discharging a part of a flow rate of a hydraulic fluid delivered from the hydraulic pump to a reservoir. A fixed restriction for generating a control pressure corresponding to the flow rate of the hydraulic fluid discharged through the unloading valve is connected downstream of the unloading valve. A control device for the hydraulic pump is constructed to reduce the delivery rate of the hydraulic pump as the control pressure generated by the fixed restriction is raised, and increase the pump delivery rate as the control pressure is lowered. An adjusting valve is connected to the hydraulic pump in parallel to the unloading valve at a position upstream of the fixed restriction, and this adjusting valve is controlled such that an opening area of the adjusting valve is large when an input amount of a control lever is small, and the opening area is reduced as the input amount of the control lever increases. Thus, LS control through the unloading valve and bleed-off control through the adjusting valve are selectively performed depending on the input amount of the control lever, so that flow rate control can be implemented by utilizing characteristics of both the control modes.
摘要翻译： 卸载阀连接到液压泵，当液压泵的输送压力和最大负载压力之间的压差超过预定值时，卸载阀打开，用于排出输送的液压流体的一部分流量 从液压泵到油箱。 用于产生与通过卸载阀排出的液压流体的流量相对应的控制压力的固定限制件连接在卸载阀的下游。 用于液压泵的控制装置被构造成随着由固定限制件产生的控制压力升高而降低液压泵的输送速率，并且随着控制压力的降低而增加泵输送速率。 调节阀在固定限制件的上游位置处与卸载阀平行地连接到液压泵，并且该调节阀被控制成使得当控制杆的输入量为 小，并且随着控制杆的输入量增加，开口面积减小。 因此，根据控制杆的输入量，选择性地执行通过卸载阀的LS控制和通过调节阀的泄放控制，从而可以通过利用两种控制模式的特性来实现流量控制。
-
公开(公告)号：US5285643A
公开(公告)日：1994-02-15
申请号：US743295
申请日：1991-08-15
申请人： Toichi Hirata , Hiroshi Onoue
发明人： Toichi Hirata , Hiroshi Onoue
摘要： A hydraulic drive system for civil-engineering and construction machines has reverse motion check valves and a regulator for selectively limiting outflow of the hydraulic fluid through the reverse-motion check valves. This prevents unusual operation of the valves in certain environments, such as in a low-temperature environment and in an environment where the civil-engineering and construction machine is operated on an incline.
摘要翻译： PCT No.PCT / JP91 / 00440 Sec。 371日期1991年8月15日 102（e）日期1991年8月15日PCT 1990年4月2日PCT PCT。 公开号WO91 / 15636 日本1991年10月17日。用于土木工程和建筑机械的液压驱动系统具有反向止回阀和用于选择性地限制液压流体通过反向止回阀的流出的调节器。 这可以防止在某些环境中的异常操作，例如在低温环境和土建工程机械在斜坡上操作的环境中。
-
-
-
-
-
-
-
-
-
搜索结果
95 条记录 (耗时 0.031 秒)
