公开(公告)号：WO0173223A3

公开(公告)日：2007-10-25

申请号：PCT/JP0102813

申请日：2001-03-30

Applicant: HITACHI CONSTRUCTION MACHINERY ,  ADACHI HIROYUKI ,  HIRATA TOICHI ,  SUGIYAMA GENROKU ,  WATANABE HIROSHI ,  SHIBATA KOICHI ,  KOMATSU HIDEKI

Inventor： ADACHI HIROYUKI ,  HIRATA TOICHI ,  SUGIYAMA GENROKU ,  WATANABE HIROSHI ,  SHIBATA KOICHI ,  KOMATSU HIDEKI

IPC: E02F9/20

CPC classification number: E02F9/20 ,  E02F9/2054 ,  E02F9/26

Abstract: The position of a work machine is measured. A position signal representing the measured position is transmitted and received so as to calculate management information concerning the work machine according to the received position signal. The calculated management information is transmitted to the work machine. The management information includes the type of attachment proper to the quality of soil and weather forecast.

Abstract translation: 测量作业机的位置。 发送和接收表示测量位置的位置信号，以便根据接收到的位置信号计算关于作业机器的管理信息。 计算出的管理信息被传送到作业机器。 管理信息包括适合土壤和天气预报质量的附件类型。

公开(公告)号：WO1995030059A1

公开(公告)日：1995-11-09

申请号：PCT/JP1995000843

申请日：1995-04-27

Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD. ,  HIRATA, Toichi ,  YAMAGATA, Eiji ,  WATANABE, Hiroshi ,  HAGA, Masakazu ,  FUJISHIMA, Kazuo ,  ADACHI, Hiroyuki

Inventor： HITACHI CONSTRUCTION MACHINERY CO., LTD.

IPC: E02F03/43

CPC classification number: E02F9/2033 ,  E02F3/301 ,  E02F3/435

Abstract: An area limiting digging control device for a hydraulic shovel characterized in that an area where a front device (1A) can travel is set in advance, that the position and attitude of the front device are calculated by a control unit (9) based on signals from angle detectors (8a-8c), that a target speed vector (Vc) for the front device is calculated based on signals from operation lever devices (4a, 4b), that the target speed vector so calculated is maintained when the front device is not present in the vicinity of a boundary within the set area, while the target speed vector is corrected so as to reduce a vector component (Vcy) in a direction in which the front device approaches the boundary of the set area when the front device is present in the vicinity of the boundary within the set area, and that the target speed vector is corrected such that the front device can return to within the set area when it is out of the set area, whereby an area-limited digging operation can be carried out in an efficient fashion.

Abstract translation: 一种用于液压挖掘机的区域限制挖掘控制装置，其特征在于，预先设置前置装置（1A）可行进的区域，通过控制单元（9）基于信号计算前置装置的位置和姿态 从角度检测器（8a-8c），基于来自操作杆装置（4a，4b）的信号计算出用于前置装置的目标速度矢量（Vc），当前部装置为 不存在于设定区域内的边界附近，同时校正目标速度矢量，以便当前置装置是前置装置是前置装置接近设定区域的边界时的方向上减小矢量分量（Vcy） 存在于设定区域内的边界附近，并且校正目标速度矢量，使得当设备区域超出设定区域时，前端设备可以返回到设定区域内，从而可以进行区域限制的挖掘操作 携带o 以高效的方式。

公开(公告)号：WO1990012165A1

公开(公告)日：1990-10-18

申请号：PCT/JP1990000426

申请日：1990-03-29

Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD. ,  NAKAMURA, Kazunori ,  HIRATA, Toichi

Inventor： HITACHI CONSTRUCTION MACHINERY CO., LTD.

IPC: E02F09/22

CPC classification number: F16H61/4148 ,  E02F9/2235 ,  E02F9/2253 ,  E02F9/2292 ,  E02F9/2296 ,  F16H61/4078 ,  F16H61/456 ,  F16H61/47

Abstract: A hydraulic driving apparatus of a caterpillar vehicle including a hydraulic pump (2), a pair of right and left driving motors (3, 4) driven by pressure oil discharged from said pump, a plurality of actuators including at least one actuator (5) besides these motors, a plurality of flow rate control valves (6, 8, 10) for controlling the flows of the pressure oil supplied to these actuators, and a plurality of branched flow compensation valves (7, 8, 11) for controlling differential pressures across these flow rate control valves, each of the branched flow compensation valves having driving means (7d, 7f, 9d, 9f, 11d, 11f) for setting the target value of differential pressure across the corresponding flow rate control valve. The apparatus is further equipped with first means (28) for outputting a switch signal for changing the operation speeds of the pair of driving motors (3, 4) and second means (30, 31) for controlling the driving means (7f, 9f) of the branched flow compensation valves (7, 9) related with the pair of the driving motors in accordance with the switch signal outputted from the first means and changing the target values of differential pressures across the corresponding flow rate control valves (6, 8).

公开(公告)号：WO1990009528A1

公开(公告)日：1990-08-23

申请号：PCT/JP1990000193

申请日：1990-02-19

Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD. ,  SUGIYAMA, Genroku ,  HIRATA, Toichi

Inventor： HITACHI CONSTRUCTION MACHINERY CO., LTD.

IPC: F15B11/00

CPC classification number: E02F9/2296 ,  E02F9/2221 ,  E02F9/2232 ,  E02F9/2282 ,  E02F9/2285 ,  E02F9/2292 ,  F15B11/163 ,  F15B11/168 ,  F15B2211/20553 ,  F15B2211/25 ,  F15B2211/30535 ,  F15B2211/30555 ,  F15B2211/3111 ,  F15B2211/329 ,  F15B2211/50518 ,  F15B2211/5159 ,  F15B2211/55 ,  F15B2211/6054 ,  F15B2211/71 ,  F15B2211/78

Abstract: This invention relates to a hydraulic circuit for working machines, provided with a hydraulic fluid source (1), at least one hydraulic actuator (3 or 13) adapted to be driven by the hydraulic fluid supplied from the hydraulic fluid source, flow rate control valves (4; 4A or 14; 14A) adapted to control a flow of the hydraulic fluid supplied to the actuator, and pressure control means (5; 5A or 15; 15A) for maintaining the pressure differences across the flow rate control valves on predetermined levels. The apparatus according to this invention has a first means (20; 23; 35, 36) for selectively producing one of a pressure equal to a load pressure and an intermediate pressure higher than the load pressure but lower than a supply pressure, on the basis of a load pressure on the actuator (3 or 13) and a supply pressure in the hydraulic fluid source (1), and outputting the resultant pressure as a control pressure; a second means (21; 27; 29; 34, 36) for operating the first means to specify a pressure to be selected as a control pressure, i.e. one of the pressure equal to the load pressure and the intermediate pressure; and a communication means (22) for introducing the control pressure to the pressure control means (5; 5A or 15; 15A). The pressure control means is adapted to maintain the above-mentioned pressure difference on the above-mentioned predetermined level when the control pressure is equal to the load pressure, and set the pressure difference to one lower than the predetermined level when the control pressure is the intermediate pressure.

公开(公告)号：WO1989008200A1

公开(公告)日：1989-09-08

申请号：PCT/JP1989000218

申请日：1989-03-02

Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD. ,  HIRATA, Toichi ,  YOSHIDA, Kuniaki ,  TANAKA, Hideaki ,  SUGIYAMA, Genroku ,  HAGA, Masakazu

Inventor： HITACHI CONSTRUCTION MACHINERY CO., LTD.

IPC: F15B11/04

CPC classification number: E02F9/2235 ,  F16H61/4061 ,  G05B2219/35392 ,  G05B2219/41302 ,  G05B2219/42241 ,  G05B2219/43203

Abstract: This invention relates to a method and an apparatus for driving a hydraulic machine equipped with a plurality of hydraulic actuators such as hydraulic shovel, which can operate all of the hydraulic actuators with normal operation speed characteristics (first mode), can change the operation speed characteristics of at least part of the hydraulic actuator(s) among these hydraulic actuators to other characteristics (second mode) in accordance with the work requirements and can operate the part of the hydraulic actuator(s) with the operation speed characteristics of the second mode without affecting the operation speed characteristics of the other hydraulic actuators.

公开(公告)号：WO1997011278A1

公开(公告)日：1997-03-27

申请号：PCT/JP1996002660

申请日：1996-09-17

Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD. ,  HIRATA, Toichi ,  SUGIYAMA, Genroku ,  TOYOOKA, Tsukasa

Inventor： HITACHI CONSTRUCTION MACHINERY CO., LTD.

IPC: F15B11/17

CPC classification number: E02F9/2242 ,  E02F9/2292 ,  E02F9/2296

Abstract: The respective pump ports (9p, 10p, 11p, 13p) of directional control valves (9-11, 13) for a boom, an arm, a bucket and a first drive are connected to first and second hydraulic pumps (1a, 1b) via feeder lines (93a, 93b, 103a, 103b, 113a, 113b, 133a, 133b) which are provided with auxiliary valves (91a, 91b, 101a, 101b, 111a, 111b, 131a, 131b) controlled by proportional solenoid valves (31a, 31b; 32a, 32b; 33a, 33b; 34a, 34b). The auxiliary valves function as variable resistances, including the functions of a check valve and a shut-off valve. This arrangement enables a hydraulic system of a closed center circuit to form a confluent circuit and a preferential circuit of simple structures, and the degree of preference and metering characteristics in a complex operation of an actuator to be set independently of each other.

Abstract translation: 用于动臂，臂，铲斗和第一驱动的方向控制阀（9-11,13）的各个泵口（9p，10p，11p，13p）连接到第一和第二液压泵（1a，1b） 通过比例电磁阀（31a）控制的辅助阀（91a，91b，101a，101b，111a，111b，131a，131b）的供给管路（93a，93b，103a，103b，113a，113b，133a，133b） ，31b; 32a，32b; 33a，33b; 34a，34b）。 辅助阀具有可变电阻的功能，包括止回阀和截止阀的功能。 这种布置使得闭合中心电路的液压系统能够形成合流电路和简单结构的优选电路，以及要彼此独立设置的致动器的复杂操作中的偏好度和计量特性。

公开(公告)号：WO1996000820A1

公开(公告)日：1996-01-11

申请号：PCT/JP1995001258

申请日：1995-06-23

Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD. ,  SUGIYAMA, Genroku ,  HIRATA, Toichi ,  ISHIKAWA, Koji ,  TOYOOKA, Tsukasa ,  NAKAMURA, Tsuyoshi

Inventor： HITACHI CONSTRUCTION MACHINERY CO., LTD.

IPC: E02F03/42

CPC classification number: E02F9/2282 ,  E02F9/2228 ,  E02F9/2242 ,  E02F9/2285

Abstract: In order that a boom can be hoisted smoothly in a triple-action operation including boom hoisting, arm crowding and bucket crowding actions, a hydraulic circuit apparatus for a hydraulic excavator is provided in a first valve group in a hydraulic valve unit (12) with a variable throttle valve (70) at the downstream side on a load check valve (32a) in a feeder passage (32) for a directional switching valve (21) for a bucket, and a secondary pressure (C) as a boom hoisting command is introduced into a pilot operating element (70a), which is operated in the throttling direction of the variable throttle valve (70), via a line (71). When the secondary pressure (C) is zero or low, the variable throttle valve is fully opened, and the area of an opening of this variable throttle valve is reduced as the secondary pressure (C) increases, whereby a flow rate of a pressure oil supplied through the directional switching valve (21) for a bucket is restricted.

Abstract translation: 为了在包括起重臂提升，斗杆拥挤和铲斗拥挤动作的三重动作操作中能够平稳地提升起重臂，液压挖掘机的液压回路装置设置在液压阀单元（12）的第一阀组中， 在用于铲斗的方向切换阀（21）的供给通道（32）中的负载止回阀（32a）的下游侧的可变节流阀（70）和作为悬臂起重指令的二次压力（C） 被引入经由管线（71）在可变节流阀（70）的节流方向上操作的先导操作元件（70a）。 当二次压力（C）为零或低时，可变节流阀完全打开，并且该可变节流阀的开口面积随着二次压力（C）增加而减小，由此压力油的流量 通过用于铲斗的方向切换阀（21）供应的限制。

公开(公告)号：WO1994013959A1

公开(公告)日：1994-06-23

申请号：PCT/JP1993001763

申请日：1993-12-03

Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD. ,  HIRATA, Toichi ,  SUGIYAMA, Genroku ,  OCHIAI, Masami

Inventor： HITACHI CONSTRUCTION MACHINERY CO., LTD.

IPC: F15B11/02

CPC classification number: E02F9/2282 ,  E02F9/2217 ,  E02F9/2221 ,  E02F9/2296 ,  F15B11/024 ,  F15B2011/0243 ,  F15B2011/0246 ,  F15B2211/20546 ,  F15B2211/20576 ,  F15B2211/30505 ,  F15B2211/30525 ,  F15B2211/3058 ,  F15B2211/3116 ,  F15B2211/31576 ,  F15B2211/329 ,  F15B2211/6303 ,  F15B2211/6309 ,  F15B2211/6313 ,  F15B2211/6316 ,  F15B2211/6346 ,  F15B2211/6654 ,  F15B2211/6655 ,  F15B2211/67 ,  F15B2211/7053 ,  F15B2211/7058 ,  F15B2211/71 ,  F15B2211/75 ,  F15B2211/88

Abstract: A hydraulic regenerator provided in a hydraulic driving unit which is provided with a plurality of actuators (4, 5) operated by a pressure oil supplied from a capacity-variable type hydraulic pump (1), and a plurality of direction change-over valves (2, 3) respectively provided between the hydraulic pump and actuators and adapted to control a flow of the pressure oil supplied to the corresponding actuators; and having variable resistance means (6, 60) provided in a first line (12), via which a tank port (23) of at least one direction change-over valve (2) out of the direction change-over valves and a tank (9) communicate with each other, and adapted to control the flow rate of the pressure oil flowing from a tank port to the tank in accordance with a control signal (Px), a third line (14) via which a portion on the upstream side of the variable resistance means in the first line and a second line (10C) connected to pump port (24) of the above-mentioned direction change-over valve communicate with each other, and a check valve (7) provided in the third line and allowing only a flow of the pressure oil running from the first line to the second line. This hydraulic regenerator is further provided with (a) means (101, 106, 102a, 102b, 103a, 103b) for detecting the quantities of state (Pd, Ph, Pia1, Pia2, Pib1, Pib2) associated with the operation of the above actuators, (b) control means (100, 100A-100H) receiving signals from the detecting means and generating on the basis of the preregistered relation driving signals (i, i*) corresponding to the above-mentioned quantities of state, and (c) a control signal generating means (105) adapted to receive the above-mentioned driving signals and generate the above-mentioned control signal (Px) in accordance with the same driving signals, and it is designed so as to enable the characteristics of the variable resistance means to be set arbitrarily, and sudden variation of a regeneration flow rate to be prevented.

Abstract translation: 液压再生器设置在液压驱动单元中，该液压驱动单元设置有由从容量可变型液压泵（1）供应的压力油操作的多个致动器（4,5）和多个方向转换阀（ 分别设置在液压泵和致动器之间并且适于控制供应到相应致动器的压力油的流动; 并且具有设置在第一管线（12）中的可变阻力装置（6,60），通过所述第一管路将至少一个方向转换阀（2）的罐口（23）从所述方向转换阀和罐 （9）彼此连通，并且适于根据控制信号（Px）控制从罐口流向罐的压力油的流量;第三管线（14），上游的一部分 第一线中的可变电阻装置的侧面和与上述方向转换阀的泵口（24）连接的第二线路（10C）彼此连通，并且设置在第三线路中的止回阀（7） 并且仅允许从第一线路运行到第二线路的压力油的流动。 该液压再生器还设置有（a）用于检测与上述操作相关联的状态量（Pd，Ph，Pia1，Pia2，Pib1，Pib2）的装置（101,106,102a，102b，103a，103b） 致动器，（b）从检测装置接收信号并基于与上述数量的状态相对应的预注册关系驱动信号（i，i *）产生的控制装置（100,100A-100H）和（c ）控制信号发生装置（105），其适于接收上述驱动信号并根据相同的驱动信号产生上述控制信号（Px），并且被设计成使得可变的特性 电阻装置被任意设定，并且可防止再生流量的突然变化。

公开(公告)号：WO1993021395A1

公开(公告)日：1993-10-28

申请号：PCT/JP1993000508

申请日：1993-04-20

Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD. ,  SUGIYAMA, Genroku ,  HIRATA, Toichi

Inventor： HITACHI CONSTRUCTION MACHINERY CO., LTD.

IPC: E02F03/43

CPC classification number: F15B13/0403 ,  E02F9/2232 ,  E02F9/2239 ,  E02F9/2282 ,  E02F9/2292 ,  E02F9/2296 ,  F15B11/161 ,  F15B11/17 ,  F15B13/0418 ,  F15B2211/20553 ,  F15B2211/20576 ,  F15B2211/30555 ,  F15B2211/3116 ,  F15B2211/3127 ,  F15B2211/329 ,  F15B2211/351 ,  F15B2211/365 ,  F15B2211/40515 ,  F15B2211/428 ,  F15B2211/45 ,  F15B2211/6054 ,  F15B2211/6057 ,  F15B2211/6355 ,  F15B2211/7058 ,  F15B2211/7142 ,  F15B2211/78

Abstract: A hydraulic circuit device for construction machines wherein a first pressure regulator (130) for controlling the downstream pressure of first variable throttles (107, 107a) to a value corresponding to a first signal pressure is disposed between the first variable throttles of a directional control valve (47) for leftward running and a first running motor (57), and wherein a second pressure regulator (133) for controlling the downstream pressure of second variable throttles (108, 108a) to a value corresponding to a second signal pressure is disposed between the second variable throttles of a directional control valve (49) for rightward running and a second running motor (57). A negative pressure of either the first or second running motor, whichever is higher, is detected by a shuttle valve (136) as a maximum negative pressure, and signal switching valves (131, 135, 170) are caused to operate during combination operation in which the first and second running motors and at least one of a plurality of work machine actuators (53 to 56) are simultaneously driven, whereby themaximum negative pressure is imparted to the first and second pressure regulators as first and second signal pressures. Even when this enables a communication circuit (110) to be put into operation as the work machine actuators are put into operation during combination operation in which running and the operation of the work machine are simultaneously effected to thereby allow a pressure oil supply circuit (104) of the second directional control valve for rightward running and a pressure oil supply circuit (103) of the first directional control valve for leftward running to communicate with each other, differences in pressure across the first and second throttles become substantially equal to each other, thereby making it possible to secure a straight running capability.

Abstract translation: 一种用于施工机械的液压回路装置，其中用于将第一可变节流阀（107,107a）的下游压力控制为对应于第一信号压力的值的第一压力调节器（130）设置在方向控制阀的第一可变节流阀 （47）和第一行驶马达（57），并且其中用于将第二可变节流阀（108,108a）的下游压力控制为对应于第二信号压力的值的第二压力调节器（133）设置在 用于向右行驶的方向控制阀（49）的第二可变节流阀和第二行驶马达（57）。 第一或第二运行电机的负压（以较高者为准）由梭阀（136）作为最大负压检测，并且使信号切换阀（131,135,170）在组合操作期间操作 其中第一和第二运行电动机以及多个作业机械致动器（53至56）中的至少一个被同时驱动，由此最大负压作为第一和第二信号压力被赋予第一和第二压力调节器。 即使当这样使得通信电路（110）能够在组合操作中投入运行时，其中同时进行作业机的运行和操作，从而允许压力油供应回路（104 ）和用于向左行驶的第一方向控制阀的压力供油回路（103）彼此连通，所述第一和第二节流阀两端的压力差基本上彼此相等， 从而能够确保直线行驶能力。

公开(公告)号：WO1992009809A1

公开(公告)日：1992-06-11

申请号：PCT/JP1991001621

申请日：1991-11-26

Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD. ,  HIRATA, Toichi ,  SUGIYAMA, Genroku

Inventor： HITACHI CONSTRUCTION MACHINERY CO., LTD.

IPC: F15B11/00

CPC classification number: F15B13/0403 ,  E02F9/2232 ,  E02F9/2296 ,  F15B11/163 ,  F15B13/0417 ,  F15B2211/20546 ,  F15B2211/253 ,  F15B2211/30535 ,  F15B2211/30555 ,  F15B2211/31576 ,  F15B2211/45 ,  F15B2211/851

Abstract: Each of direction change-over valves (5, 6) respectively provided between a hydraulic supply system (50) and a plurality of actuators (3, 4) comprises: a pump port (9); a pressure chamber (10); a feeder path (11); actuator ports (12a, 12b); a tank port (13); first variable throttles (15a, 15b) of a meter-in system, which are provided between the pump port and the pressure chamber; and a pressure compensation valve (16) provided between the pressure chamber and the feeder path, one of opposing ends of which receives pressure from the pressure chamber and the other end of which receives the maximum of load pressures of the plurality of actuators. The hydraulic supply system comprises: a hydraulic pump (1); and a pump flowrate control device (2) for controlling a discharge flowrate of the hydraulic pump in such a manner that discharge pressure of the hydraulic pump is higher by a predetermined value than the maximum of load sensing pressures obtained from load pressures of the plurality of actuators. At least one of the direction change-over valves further comprises: a bleed path (21) for connecting the feeder path (11) and the tank port (13) to each other; and second variable throttles (22a, 22b) provided in this bleed path and interlocked with the first variable throttles of the meter-in system. With this arrangement, an abrupt action of the actuators for driving an inertial member is prevented and vibrations of the circuit are controlled even when one of a pump discharge flowrate and a load pressure is fluctuated.