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1. 发明专利

JPS6113002A Hydraulic circuit 失效
标题翻译：液压回路
公开(公告)号：JPS6113002A
公开(公告)日：1986-01-21
申请号：JP13089384
申请日：1984-06-27
申请人： Hitachi Constr Mach Co Ltd
发明人： TANAKA SOUTAROU
IPC分类号： E02F9/22 , F15B11/16 , F15B11/17 , F15B13/042
CPC分类号： F15B13/0422
摘要： PURPOSE:To make a directional control valve increasable so easily and inexpensively with a simple circuit structure, by selecting a converging directional control valve to a position at the opposite discharge side with an operating signal out of a newly increased directional control valve. CONSTITUTION:In order to control a newly increased hydraulic cyliner 22, a directional control valve 23 is via each of pilot pipe lines 25a and 25b. These pilot pipe lines 25a and 25b are connected to a pilot port of a converging directional control valve 4c via a pilot pipe line 27 and a shuttle valve 26, and with an operating signal of the directional control valve 23, the converging directional valve 4c is selected to a position at the opposite discharge side. With this constitution, installation for a logic valve, a selector valve, etc., is longer required, so that a new directional control valve is increasable so easily and inexpensively with a simple circuit structure.
摘要翻译：目的：通过简单的电路结构使方向控制阀可以容易且廉价地增加，通过从新增的方向控制阀中的操作信号选择会聚方向控制阀到相对排放侧的位置。构成：为了控制新增的液压缸22，方向控制阀23经由先导管路25a和25b中的每一个。这些先导管路25a，25b经由先导管路27和梭阀26与会聚方向控制阀4c的先导端口连接，并且通过方向控制阀23的操作信号，会聚方向阀4c为选择到相对放电侧的位置。采用这种结构，需要更长时间地安装逻辑阀，选择阀等，从而通过简单的电路结构，新的方向控制阀可以容易且廉价地增加。

2. 发明专利

JPS59106701A Buffer for hydraulic cylinder 失效
标题翻译：液压缸缓冲器
公开(公告)号：JPS59106701A
公开(公告)日：1984-06-20
申请号：JP21342182
申请日：1982-12-07
申请人： Hitachi Constr Mach Co Ltd
发明人： TAKAHASHI YUTAKA , YAGIYUU TAKASHI , TANAKA SOUTAROU , YAMAGUCHI TAKESHI
IPC分类号： F15B11/00 , F15B11/04
摘要： PURPOSE: To secure the superior buffer performance at any operation speed of a hydraulic cylinder by supplying a pressure for turning-back a spool in the neutral drection in relation to the operation speed of the hydraulic cylinder a gainst a pilot pressure supplied to the spool of a hydraulic control valve through a manual reducing valve.
CONSTITUTION: A pressure supply means, e.g., an electromagnetic proportional control valve 27 receives an electric signal from a calculator 28 and makes contact with a pilot pump 22. A position detector 29 detects the position of the piston of a hydraulic cylinder 10 at each unit time and outputs the position signal into the calculator 28. Shuttle valves 30 and 31 select the higher pressure out of a pilot pressure supplied through manual reducing valves 25 and 26 and a pressure supplied through an electromgnetic proportional control valve 27, and supplies said pressure into the spool of a hydraulic control valve 21. The calculator 28 outputs the instruction signal for increasing the pressure supplied, into the electromagnetic proportional control valve 27, when the operation speed is high when a buffer starts operation.
COPYRIGHT: (C)1984,JPO&Japio
摘要翻译：目的：为了通过提供相对于液压缸的操作速度的中立式转弯中的阀芯的回转压力来确保液压缸的任何运行速度下的优越的缓冲性能，增加供给到阀芯的阀芯的先导压力一个通过手动减压阀的液压控制阀。构成：压力供应装置，例如电磁比例控制阀27接收来自计算器28的电信号并与先导泵22接触。位置检测器29检测液压缸10在每个单元处的位置时间并将位置信号输出到计算器28中。梭阀30和31从通过手动减压阀25和26提供的先导压力以及通过电动比例控制阀27供给的压力选择较高的压力，并将所述压力供应到液压控制阀21的阀芯。当缓冲器开始运行时，当运行速度高时，计算器28输出用于增加供给的压力的指令信号到电磁比例控制阀27中。

3. 发明专利

JPS5920564A Engine starter 失效
标题翻译：发动机起动器
公开(公告)号：JPS5920564A
公开(公告)日：1984-02-02
申请号：JP12901282
申请日：1982-07-26
申请人： Hitachi Constr Mach Co Ltd
发明人： TANAKA SOUTAROU , YAMAGUCHI TAKESHI , SAKAKI YASUO , YAGIYUU TAKASHI
IPC分类号： F02B63/06 , F02N7/08
CPC分类号： F02N7/08
摘要： PURPOSE:To provide easy starting of an engine in a device, described in the heading, which has two hydraulic pumps by supplying one hydraulic pump connected to the engine with pressure oil from the other hydraulic pump which is driven by a readily started driving device. CONSTITUTION:The second hydraulic pump 9 supplies the first hydraulic pump 3 with pressure oil and a driving device 10 is a small-sized engine which drives the second hydraulic pump 9. In case an engine, when cool, is started, the driving device 10 is first turned and the second hydraulic pump 9 is driven to supply the pressure oil thereof for a pipe passage 3a of a closed circuit. Under the condition, a pilot control valve 16 is controlled to actuate a displacement variable mechanism driving device 4, making the displacement variable mechanism motored by the first hydraulic pump 3. The first hydraulic pump 3 is gradually started and an engine 1 is also started. If a stop valve 6 is closed, an oil pressure circuit toward the hydraulic motor 5 may be cut off, whereby producing no adverse influence on the hydraulic motor 5.
摘要翻译：目的：为了简便起动发动机，在标题中描述的装置中，其具有两个液压泵，该液压泵通过将一个连接到发动机的液压泵与来自另一个由容易启动的驱动装置驱动的液压泵的压力油相连。构成：第二液压泵9向第一液压泵3供给压力油，驱动装置10是驱动第二液压泵9的小型发动机。在发动机冷却时起动的情况下，驱动装置10 首先转动，第二液压泵9被驱动以供给用于闭合回路的管道3a的压力油。在这种条件下，控制先导控制阀16来驱动位移可变机构驱动装置4，使第一液压泵3驱动位移可变机构。第一液压泵3逐渐启动，发动机1也起动。如果截止阀6关闭，则可以切断朝向液压马达5的油压回路，从而不会对液压马达5产生不利影响。

4. 发明专利

JPS57123332A Oil pressure circuit for civil engineering and construction machinery 失效
标题翻译：石油工程与建筑机械油压电路
公开(公告)号：JPS57123332A
公开(公告)日：1982-07-31
申请号：JP858181
申请日：1981-01-24
申请人： Hitachi Constr Mach Co Ltd
发明人： YAMAGUCHI TAKESHI , TANAKA SOUTAROU , YAGIYUU TAKASHI , SAKAKI YASUO , IZUMI EIKI
IPC分类号： E02F9/22 , F15B11/08 , F15B11/16 , F15B11/17
CPC分类号： F15B11/17 , F15B2211/20538 , F15B2211/20553 , F15B2211/20576 , F15B2211/6355 , F15B2211/67 , F15B2211/7058 , F15B2211/7135 , F15B2211/7142
摘要： PURPOSE:To prevent the rotation of an engine being stopped by providing an opening and closing valve and a check valve to a circuit in such a way that no influence of the oil pressure of a pump in operation exerts on the pump being stopped of plural oil-pressure pumps. CONSTITUTION:When an engine 11a turns and an engine 11b is stopped, a swirl pump 16a and a pilot pump 15a are actuated, and their discharge pressures are supplied through a check valve 28a to a pilot valve 23. Also, under the condition that an valve 26a is in opened state, the discharge pressure of the pump 15a is supplied as a servo pressure to the regulator 22a. By this, the swirl pump 10 is turned through the regulator 22a and the pump 16a by operation of a lever 24. On the other hand, since the pilot pump 15 does not discharge oil and the discharge pressure of the pilot pump 15a is interrupted by the check valve 28b, the valve 26b is inclosed state, a servo pressure circuit 25b is connected with a tank 27b, and the circuit pressure is zeroed.
摘要翻译：目的：为了防止发动机的转动，通过向电路提供一个开闭阀和一个止回阀，使得泵的操作不会对泵的油压产生影响，停止多个油压力泵。构成：当发动机11a转动并且发动机11b停止时，旋转泵16a和先导泵15a被致动，并且它们的排出压力通过止回阀28a被提供给先导阀23.而且，在阀26a处于打开状态，泵15a的排出压力作为伺服压力被提供给调节器22a。由此，通过操作杆24，旋流泵10通过调节器22a和泵16a转动。另一方面，由于先导泵15不排出油，并且先导泵15a的排出压力被中断了止回阀28b，阀26b处于闭合状态，伺服压力回路25b与油箱27b连接，回路压力为零。

5. 发明专利

JPS57123330A Oil-pressure circuit for oil-pressure excavator 失效
标题翻译：油压开挖机油压回路
公开(公告)号：JPS57123330A
公开(公告)日：1982-07-31
申请号：JP858281
申请日：1981-01-24
申请人： Hitachi Constr Mach Co Ltd
发明人： YAMAGUCHI TAKESHI , TANAKA SOUTAROU , YAGIYUU TAKASHI , SAKAKI YASUO
IPC分类号： E02F3/43 , E02F9/22
CPC分类号： E02F9/2217
摘要： PURPOSE:To recover the potential energy of boom by using a system in which when oil pressure on the bottom side of a boom cylinder is higher than that on rod side, an oil chamber on the bottom side is shortcircuited with an oil chamber on the rod side in terms of oil pressure. CONSTITUTION:In case a holding pressure is present in the bottom side oil chamber of a boom cylinder 7, a valve 22 connects the circuit of pilot pressure signal P2 to a valve 21 by a pressure difference between the bottom side oil chamber and the rod side oil chamber, whereby permitting the pilot pressure signal P2 to be put in the valve 21. Under the condition, when the pilot pressure signal P2 is sent out by an operating lever 19, the signal P2 acts on the valve 21 through the valve 22 to open it, and the bottom side oil chamber of the boom cylinder 7 is shortcircuited with the rod side oil chamber in terms of oil pressure. At the same time, a direction switch valve 14 is switched to the left side by the signal P2. By this, part of oil is flowed into the rod side oil chamber by the holding pressure of the bottom side oil chamber, the rest of oil is released to a tank 17 through the valve 14, the rod of the boom cylinder 7 is shrunk, and the boom is lowered and potential energy is recovered.
摘要翻译：目的：通过使用一个系统来恢复动臂的潜在能量，当系统中，当液压缸底部的油压比杆侧的油压高时，底侧的油室与杆上的油室短路在油压方面。构成：在动臂缸7的底侧侧油室中存在保持压力的情况下，阀22通过底侧油室与杆侧之间的压力差将先导压力信号P2的回路连接到阀21 油室，由此允许先导压力信号P2放入阀21中。在这种情况下，当先导压力信号P2被操作杆19输出时，信号P2通过阀22作用在阀21上打开它，并且在油压方面，悬臂缸7的底侧油室与杆侧油室短路。同时，方向切换阀14通过信号P2向左侧切换。由此，一部分油通过底侧油室的保持压力流入杆侧油室，其余油通过阀14释放到油箱17中，动臂油缸7的杆收缩，并且起重臂被降低并且潜在的能量被恢复。

6. 发明专利

JPS5781536A Turnable oil-pressure closed circuit for construction machinery 失效
标题翻译：用于建筑机械的可压缩油压闭合电路
公开(公告)号：JPS5781536A
公开(公告)日：1982-05-21
申请号：JP15578380
申请日：1980-11-07
申请人： Hitachi Constr Mach Co Ltd
发明人： TANAKA SOUTAROU , YAMAGUCHI TAKESHI , SAKAKI YASUO , YAGIYUU TAKASHI
IPC分类号： E02F9/22 , E02F9/12 , E02F9/20 , F16H61/40 , F16H61/42 , F16H61/433
摘要： PURPOSE: To make easier the operation of control on construction machinery by a method in which a turnable oil-pressure circuit is closed when a turning oil- pressure motor is stopped, and the turning oil-pressure motor is turned so that a hold valve is closed by a pilot pressure.
CONSTITUTION: A hold valve 20 by which the main circuit is closed at the position A and a pipeline on a turning oil-pressure motor 3 is blocked at the position B is provided, and higher pilot pressure for the inclined angle control mechanism 18 of a variable capacity type oil-pressure pump 2 is supplied through a shuttle valve 21 to the pilot port of the hold valve 20. And, a check valve 23 is provided to the first pilot pipeline connecting the shuttle valve 21 with the pilot port of the hold valve 20, and the second pilot circuit 24 is provided between the check valve 23 and the shuttle valve 21. When the inclined angle of the oil-pressure pump 2 is 0, the second pipeline 24 is opened, but when the inclined angle is other than 0, the pilot pipeline 24 is closed.
COPYRIGHT: (C)1982,JPO&Japio
摘要翻译：目的：通过在转向油压电机停转时关闭可转动油压回路的方法，使转向油压电机转动，使保持阀为由先导压力关闭。构成：在位置A处主阀闭合的保持阀20和转向油压马达3上的管路在位置B处被堵塞，并且提供用于倾斜角度控制机构18的较高先导压力可变容量型油压泵2通过梭阀21供给到保持阀20的先导口。并且，在将梭阀21与保持阀的先导口连接的第一先导管路上设置止回阀23 阀20，第二先导回路24设置在止回阀23和梭阀21之间。当油压泵2的倾斜角度为0时，第二管路24打开，但是当倾斜角为其他超过0时，先导管道24关闭。

7. 发明专利

JPS5920563A Engine starter 失效
标题翻译：发动机起动器
公开(公告)号：JPS5920563A
公开(公告)日：1984-02-02
申请号：JP12901182
申请日：1982-07-26
申请人： Hitachi Constr Mach Co Ltd
发明人： TANAKA SOUTAROU , YAMAGUCHI TAKESHI , SAKAKI YASUO , YAGIYUU TAKASHI
IPC分类号： F02B63/06 , F02N7/08
CPC分类号： F02N7/08
摘要： PURPOSE:To provide easy starting of an engine in a device, described in the heading, which has two hydraulic pumps by supplying one hydraulic pump connected to the engine with pressure oil from the other hydraulic pump which is driven by a readily started driving device. CONSTITUTION:The second hydraulic pump 9 supplies the first hydraulic pump 3 with pressure oil and a driving device 10 is a small-sized engine which drives the second hydraulic pump 9. In case an engine, when cool, is started, the second hydraulic pump 9 is first driven, to supply a pressure oil of the second hydraulic pump 9 to a pipe passage 3a of the hydraulic pump 3. Under the condition, a pilot control valve 16 is controlled to actuate a displacement variable mechanism driving device 4, making the mechanism motored by the first hydraulic pump 3. The first hydraulic pump 3 is then gradually makes revolution with a great torque and an engine 1 which is connected thereto is revolved together.
摘要翻译：目的：为了简便起动发动机，在标题中描述的装置中，其具有两个液压泵，该液压泵通过将一个连接到发动机的液压泵与来自另一个由容易启动的驱动装置驱动的液压泵的压力油相连。构成：第二液压泵9向第一液压泵3供给压力油，驱动装置10是驱动第二液压泵9的小型发动机。在发动机冷却时起动的情况下，第二液压泵 9被驱动，将第二液压泵9的压力油提供给液压泵3的管路3a。在这种条件下，控制先导控制阀16致动位移可变机构驱动装置4，由第一液压泵3驱动的机构。然后，第一液压泵3以大的扭矩逐渐地进行转动，并且与之连接的发动机1一起旋转。

8. 发明专利

JPS58204234A Oil-pressure circuit for oil-pressure type excavator 失效
标题翻译：油压式挖掘机油压回路
公开(公告)号：JPS58204234A
公开(公告)日：1983-11-28
申请号：JP8489782
申请日：1982-05-21
申请人： Hitachi Constr Mach Co Ltd
发明人： YAGIYUU TAKASHI , YAMAGUCHI TAKESHI , TANAKA SOUTAROU , SAKAKI YASUO
IPC分类号： E02F9/22 , F15B11/00
CPC分类号： E02F9/2292 , E02F9/2239
摘要： PURPOSE:To optimize the operating speed of an actuator at the maximum operation amount by a method in which when supplying pressure oil from a variable capacity discharge pump to plural actuators, a regulator having a discharge setter is provided to the discharge pump. CONSTITUTION:When the discharge pressures of variable capacity pumps 1 and 2 are raised, the discharge amounts of the pumps are lowered by regulators 28 and 29. When pilot pressure signal P is less than P1, the pump discharge amount becomes Q=Q1, and in the ranges of P1
摘要翻译：目的：通过将可变容量排放泵的压力油供给多个执行器的方法，以最大运行量来优化执行机构的运转速度，将具有排气定位器的调节器设置在排出泵上。构成：当可变容量泵1和2的排出压力升高时，泵的排出量由调节器28和29降低。当先导压力信号P小于P1时，泵排出量变为Q = Q1，在P1 <= P <= P3的范围内，泵排出量Q增加。在超过P3的情况下，将排出量设定为Q = Q3，并且调整斜盘角度的倾斜度。然后，当从可变容量油压泵1和2之一向多个致动器（例如，臂缸11或悬臂缸12等）供应压力油时，将泵的排放设置为在每个致动器的操作量最大时设定的排出量被提供给调节器28和29。

9. 发明专利

JPS57127028A Hydraulic circuit for loading shovel 失效
标题翻译：液压电路用于装载
公开(公告)号：JPS57127028A
公开(公告)日：1982-08-07
申请号：JP1013181
申请日：1981-01-28
申请人： Hitachi Constr Mach Co Ltd
发明人： YAGIYUU TAKASHI , YAMAGUCHI TAKESHI , TANAKA SOUTAROU , SAKAKI YASUO
IPC分类号： E02F3/43 , E02F3/42
CPC分类号： E02F3/42
摘要： PURPOSE:To eliminate the need to raise a boom in case a bucket returns to an excavation start position, by a method wherein a switch valve is mounted at lines for connecting together a level cylinder and boom cylinder, and the switch valve is shut off at a time when a rod of an arm cylinder contracts. CONSTITUTION:A switch valve 21 is situated between lines 10 and 11 connecting together a level cylinder 9 and a boom cylinder 6. The switch valve 21 is changed over to a switching position (m) through reception of a pilot pressure signal from a line (a), and is kept in a switching position (n) where no pilot pressure signal is inputted. In order to return a bucket to an excavating start position through contraction of a rod of an arm cylinder 7 after soil is unloaded from the bucket, the switch valve 21 is kept in the switching position (n), the lines 10 and 100 are shut off, and a rod side oil chamber 9A and a bottom side oil chamber 6A are connected to a tank 16. This prevents generating of oil pressure in an oil chamber 9B even through the contraction of the rod of the cylinder 7, exerts no influence on the cylinder 6, and prevents a boom 3 from being raised.
摘要翻译：目的：为了消除在铲斗返回挖掘开始位置时提升起重臂的需要，通过一种方法，其中切换阀安装在用于将液压缸和动臂缸连接在一起的管路上，并且切换阀被切断一个胳膊arm a cylinder cylinder的时候。构成：开关阀21位于将液压缸9和动臂缸6连接在一起的管线10和11之间。切换阀21通过接收来自管线的先导压力信号而切换到切换位置（m） a），并且保持在不输入先导压力信号的切换位置（n）。为了通过在从铲斗卸载污物之后通过臂气缸7的杆的收缩将铲斗返回到挖掘起始位置，切换阀21保持在切换位置（n），线10和100被关闭并且杆侧油室9A和底侧油室6A连接到罐16.这样即使通过缸7的杆的收缩也能防止在油室9B中产生油压，不会对气缸6，并且防止吊杆3升高。

10. 发明专利

JPS57123331A Oil pressure circuit for oil-pressure excavator 失效
标题翻译：用于油压挖掘机的油压回路
公开(公告)号：JPS57123331A
公开(公告)日：1982-07-31
申请号：JP858381
申请日：1981-01-24
申请人： Hitachi Constr Mach Co Ltd
发明人： YAMAGUCHI TAKESHI , TANAKA SOUTAROU , YAGIYUU TAKASHI , SAKAKI YASUO
IPC分类号： E02F3/43 , E02F9/22
CPC分类号： E02F9/2296 , E02F9/2232
摘要： PURPOSE:To enhance the inching performance of an oil-pressure excavator by using a method in which when the pressure of the bottom side oil chamber of a boom cylinder is greater than that of a rod side oil chamber, both oil chambers are shortcircuited with each other in terms of oil pressure and also the amount of oil supplied from an oil-pressure pump is reduced. CONSTITUTION:In case where a holding pressure is present in the bottom side oil chamber of a boom cylinder 7, a pilot valve 18 sends out a boom lowering signal P2 by operation of a lever 19, and the signal P2 acts on a valve 29 through a valve 30 to open it. By this, the bottom side oil chamber is shortcircuited with a rod side oil chamber. At the same time, a switch valve 14 switched to the position A, part of oil in the bottom side oil chamber flows into the rod side oil chamber by the holding pressure, the rest is released to a tank 17 through the valve 14, and the boom is lowered and potential energy is recovered. Also, the signal P2 is reduced to a signal P5 by a reducing valve 27, put in a regulator 22 through a boom lowering command selection valve 26, and controls a discharge varying mechanism 21, whereby reducing the discharge of the pump 20.
摘要翻译：目的：为了提高油压挖掘机的冲击性能，采用这样一种方法，当起重臂缸体的底侧油室的压力大于杆侧油室的压力时，两个油室都被短路另外在油压方面，也减少了从油压泵供给的油量。构成：在动臂缸7的底侧侧油室中存在保持压力的情况下，先导阀18通过杆19的操作而发出动臂下降信号P2，信号P2作用于阀29通过阀门30打开。由此，底侧油室与杆侧油室短路。同时，切换阀14切换到位置A，底侧油室中的油的一部分通过保持压力流入杆侧油室，其余的通过阀14释放到罐17中，并且动臂降低，势能恢复。此外，通过减压阀27将信号P2减小到信号P5，通过动臂下降指令选择阀26放入调节器22中，并且控制排出变化机构21，由此减小泵20的排出。

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