公开(公告)号：EP2098437A1

公开(公告)日：2009-09-09

申请号：EP07860262.0

申请日：2007-12-26

申请人： Hitachi Construction Machinery Co., Ltd ,  TCM Corporation

发明人： NAKAMURA, Kazunori ,  NAKAMURA, Tsuyoshi ,  KIHARA, Mitsuo ,  AZUMA, Hiroyuki ,  SHIMAZU, Atsushi

IPC分类号： B62D5/28 ,  B62D5/07 ,  B62D5/09 ,  E02F9/20 ,  E02F9/22

CPC分类号： B62D12/00 ,  B62D5/065 ,  B62D5/075 ,  B62D5/09 ,  E02F9/225 ,  E02F9/2253 ,  E02F9/2285 ,  E02F9/2296

摘要： A hydraulic steering unit 5 generates a control pressure corresponding to the rotational quantity and rotational direction of the steering wheel 109 on the basis of pressurized oil of a pilot pump 13. Signals of pressure sensors 6a and 6b used to detect the control pressure, and a signal of a front operation detection unit 31, are inputted into a controller 132. A controller 32 and solenoid valves 33a and 33b control a stroke of a steering valve 4 so that the stroke becomes larger with increase in control pressure detected by each of the pressure sensors 6a and 6b. In addition to it, when the operation of a front work device is detected, the controller 32 and the solenoid valves 33a and 33b control the stroke of the steering valve 4 so that the stroke becomes larger than that provided when the operation of the front work device is not detected. As a result, the wheel steering speed is kept at an optimum value in the simultaneous operation of both traveling and the operation of the front work device, and in the operation of traveling only. Therefore, the work efficiency and security can be ensured, and the operability can be also improved.

公开(公告)号：EP1900607A3

公开(公告)日：2009-02-25

申请号：EP07015893.6

申请日：2007-08-13

申请人： NISSAN MOTOR CO., LTD.

发明人： Kooriyama, Masayuki

IPC分类号： B62D5/07

CPC分类号： B62D5/075 ,  B66F9/22

摘要： A priority flow rate control valve (4) increases a distribution ratio of pressurized oil to a power steering device (1) of a fork-lift track via a power steering oil passage (9) as a differential pressure between a power steering pressure ( PS ) in the power steering oil passage (9) and a pilot pressure ( LS ) decreases. A load signal port (24) which outputs a pressure indicative of a load exerted on the power steering device (1) and the power steering oil passage (9) are connected via two orifices (26A, 26B), and the pilot pressure ( LS ) pressure is extracted from a point between the two orifices (26A, 26B). By providing a bypass passage (31, 35) which bypasses one of the two orifices (26A, 26B) and a bypass valve (30) which opens and closes the bypass passage (26A, 26B), a response of the priority flow rate control valve (4) can be increased temporarily.

公开(公告)号：EP0999115B1

公开(公告)日：2008-07-09

申请号：EP99921224.4

申请日：1999-05-20

申请人： JTEKT Corporation

发明人： MATSUOKA, Hirofumi, Koyo Seiko Co. Ltd. ,  GOTO, Yoshihiro, Koyo Seiko Co. Ltd. ,  HAMASAKI, Yoshiaki, Koyo Seiko Co. Ltd.

IPC分类号： B62D5/07 ,  H02K9/22 ,  H02K11/00 ,  F04B17/03 ,  F04B53/08

CPC分类号： F04B53/08 ,  F04B17/03 ,  H02K7/14 ,  H02K11/33

摘要： A power steering device for assisting a steering operation by a hydraulic pressure generated from a hydraulic pump, comprising an electric motor, the hydraulic pump driven by the electric motor, and a control device which is positioned between the electric motor and the hydraulic pump and controls the electric motor all formed integrally with each other, wherein a radiating body is positioned between the control device and the hydraulic pump and a heat generated by the control device is radiated to the hydraulic pump so that the heat generated in the control device can be radiated efficiently, a radiation design can be made without being affected by the atmospheric conditions, and the members of the power steering device can be replaced with low heat resisting members.

摘要翻译： 一种动力转向装置，用于通过由液压泵产生的液压来辅助转向操作，该动力转向装置包括电动机，由电动机驱动的液压泵以及位于电动机和液压泵之间的控制装置，并且控制 所述电动机全部彼此形成为一体，其中散热体位于所述控制装置和所述液压泵之间，并且由所述控制装置产生的热量辐射到所述液压泵，从而可以辐射所述控制装置中产生的热量 有效地，可以在不受大气条件影响的情况下进行辐射设计，并且动力转向装置的部件可以用低耐热部件替换。

公开(公告)号：EP1900607A2

公开(公告)日：2008-03-19

申请号：EP07015893.6

申请日：2007-08-13

申请人： NISSAN MOTOR CO., LTD.

发明人： Kooriyama, Masayuki

IPC分类号： B62D5/07

CPC分类号： B62D5/075 ,  B66F9/22

摘要： A priority flow rate control valve (4) increases a distribution ratio of pressurized oil to a power steering device (1) of a fork-lift track via a power steering oil passage (9) as a differential pressure between a power steering pressure ( PS ) in the power steering oil passage (9) and a pilot pressure ( LS ) decreases. A load signal port (24) which outputs a pressure indicative of a load exerted on the power steering device (1) and the power steering oil passage (9) are connected via two orifices (26A, 26B), and the pilot pressure ( LS ) pressure is extracted from a point between the two orifices (26A, 26B). By providing a bypass passage (31, 35) which bypasses one of the two orifices (26A, 26B) and a bypass valve (30) which opens and closes the bypass passage (26A, 26B), a response of the priority flow rate control valve (4) can be increased temporarily.

摘要翻译： 优先流量控制阀（4）通过动力转向油通道（9）增加加压油与叉车轨道的动力转向装置（1）的分配比，作为动力转向压力（PS ）和先导压力（LS）减小。 输出表示施加在动力转向装置（1）和动力转向油路（9）上的负荷的压力的负载信号端口（24）经由两个喷嘴（26A，26B）和先导压力（LS ）压力从两个孔（26A，26B）之间的点提取。 通过设置绕过两个开口（26A，26B）中的一个的旁路通道（31,35）和旁通通路（26A，26B）的旁通阀（30），优先流量控制 阀门（4）可暂时增加。

公开(公告)号：EP1826036A1

公开(公告)日：2007-08-29

申请号：EP07002859.2

申请日：2007-02-09

申请人： Actuant Corporation

发明人： Bakshi, Nikesh ,  Wen, Victor

IPC分类号： B60G17/017 ,  B60G17/04 ,  B62D5/07 ,  B62D33/08 ,  B66F9/22

CPC分类号： B62D5/07 ,  B60G17/056 ,  B60G2500/02

摘要： An auxiliary hydraulic system for a vehicle is operable to actuate one or more auxiliary hydraulic devices on board the vehicle that are only operable when the vehicle is not in transit. The vehicle has an engine that is engageable with wheels of the vehicle to propel the vehicle and a hydraulic power steering pump that is driven by the engine and supplies fluid under pressure to a power steering system of the vehicle when the vehicle is in transit. The power steering pump provides a source of hydraulic fluid under pressure to power the auxiliary hydraulic system only when the vehicle is parked.

摘要翻译： 用于车辆的辅助液压系统可操作地致动车辆上的一个或多个辅助液压装置，其仅在车辆不在运输中时可操作。 车辆具有可与车辆的车轮接合以推动车辆的发动机和由发动机驱动并在车辆运输时将压力下的流体供应到动力转向系统的液压动力转向泵。 动力转向泵仅在车辆停放时提供压力下的液压油源，为辅助液压系统供电。

公开(公告)号：EP1790551A1

公开(公告)日：2007-05-30

申请号：EP05765495.6

申请日：2005-07-05

申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.

发明人： ITOGA, Kentaro Hitachi C. M. Co., Ltd ,  NAKAMURA, Tsuyoshi Hitachi C. M.Co., Ltd ,  NAKAMURA, Kazunori Hitachi C. M. Co., Ltd

IPC分类号： B62D5/07

CPC分类号： B62D5/07 ,  E02F9/2235 ,  E02F9/225 ,  E02F9/2296

摘要： [Object] To materialize a reduction in pump loss, the assurance of sufficient working device speeds and the priority assurance of an adequate steering capacity with simpler construction and at lower cost than a load sensing system.
[Means for Achieving the Object] A hydraulic drive system for a working vehicle is provided with a priority valve for dividing pressure oil, which has been delivered from a variable displacement hydraulic pump, to give oil flow priority to a steering mechanism, plural working device actuators and a steering actuator driven by pressure oil from the priority valve, plural working device control valves for controlling flows of pressure oil to the respective working device actuators, a steering control valve for controlling a flow of pressure oil to the steering actuator, a control stroke detection means for detecting control strokes for the working device control valves, and a pump flow-rate control means for controlling a flow rate of the variable displacement hydraulic pump on the basis of a detection output from the control stroke detection means.

摘要翻译： [目标]实现减少泵损耗，确保足够的工作装置速度，并确保足够的转向能力，具有更简单的结构，成本低于负载传感系统。 实现对象的手段作业车辆的液压驱动系统设置有优先阀，用于分离从可变排量液压泵输送的压力油，以向转向机构提供油流优先权，多个工作装置 致动器和由优先阀的压力油驱动的转向致动器，用于控制对各个作业装置致动器的压力油流动的多个工作装置控制阀，用于控制向转向致动器的压力油流动的转向控制阀， 用于检测工作装置控制阀的控制冲程的行程检测装置，以及用于根据来自控制行程检测装置的检测输出来控制可变排量液压泵的流量的泵流量控制装置。

公开(公告)号：EP1724182A1

公开(公告)日：2006-11-22

申请号：EP06008565.1

申请日：2006-04-25

申请人： NISSAN MOTOR CO., LTD.

发明人： Kooriyama, Masayuki

IPC分类号： B62D5/07 ,  B66F9/22

CPC分类号： B66F9/22 ,  B62D5/075

摘要： A priority flow rate control valve (4) preferentially distributes oil discharged by an oil pump (3) to an oil pressure power steering device (1), and distributes surplus oil to a cargo handling control valve (10, 13, 14) of an oil pressure cargo handling device (2). The oil pump (3) increases the discharge flow rate according to the operation of the cargo handling device (2), and decreases the discharge flow rate according to operation stop of the cargo handling device (2). By providing an orifice (30) which drains the oil supplied to the cargo handling control valve (10, 13, 14) when the cargo handling device (2) is not operating, to a tank (8), the pressure of the oil supplied to the oil pressure power steering device (1) is prevented from temporarily decreasing when the cargo handling device (2) stops operating, thereby preventing the steering wheel (7) from suffering a so-called kickback.

摘要翻译： 优先流量控制阀（4）优先将由油泵（3）排出的油分配到油压动力转向装置（1），并将多余的油分配到货物处理控制阀（10,13,14） 油压货物处理装置（2）。 油泵（3）根据货物处理装置（2）的操作增加排出流量，并且根据货物处理装置（2）的操作停止来减小排出流量。 通过设置一个孔口（30），该孔口（30）在货物处理装置（2）不运行时将供应到货物处理控制阀（10,13,14）的油排出到罐（8）中，供应的油的压力 当货物处理装置（2）停止操作时，防止油压动力转向装置（1）暂时降低，从而防止方向盘（7）遭受所谓的反冲。

公开(公告)号：EP1710444A1

公开(公告)日：2006-10-11

申请号：EP05007336.0

申请日：2005-04-05

申请人： ARGO-HYTOS GmbH

发明人： Mössinger, Klaus ,  Baumgärtner, Reinhard

IPC分类号： F15B1/26 ,  B60T11/26 ,  B62D5/07

CPC分类号： F15B1/26

摘要： Die Erfindung betrifft einen Vorratstank (10; 80; 90) für Hydrauliköl mit einem Einlaß (32) und einem Auslaß (33) für das Hydrauliköl, wobei an den Vorratstank (10; 80; 90) ein Belüftungsfilter (35) zum Luftaustausch zwischen dem Innenraum des Vorratstanks (10; 80; 90) und der Außenatmosphäre anschließbar ist und der Vorratstank (10; 80; 90) ein Oberteil (12) und ein Unterteil (11) aufweist, die aus einem Kunststoffmaterial gefertigt und aneinander festgelegt sind. Um den Vorratstank derart weiterzubilden, daß er eine komplexe Geometrie aufweisen kann und dennoch eine hohe mechanische Belastbarkeit aufweist, wird erfindungsgemäß vorgeschlagen, daß das Ober- und das Unterteil (12, 11) formschlüssig miteinander zusammenwirkende Verbindungselemente (51, 52) umfassen.

摘要翻译： 围绕储存器（10）的上部周围形成的插入部分（52）被插入和装配到形成在储存器的下部（11）周围的接收槽（51）中，两个部分积极地连接在一起。 用于在两个部分之间提供密封的密封环（17）位于下部的上部的下边缘或下部的上边缘。

公开(公告)号：EP1659047A1

公开(公告)日：2006-05-24

申请号：EP04772066.9

申请日：2004-08-24

申请人： Koyo Seiko Co., Ltd.

发明人： HIRAKUSHI, Shuzo, c/o KOYO SEIKO CO., LTD. ,  SANO, Osamu, c/o KOYO SEIKO CO., LTD. ,  UOTA, Masashi, c/o KOYO SEIKO CO., LTD. ,  SHINTOU, Hiroaki; c/o KOYO SEIKO CO., LTD. ,  KOTAKE, Yoshimi, c/o KOYO SEIKO CO., LTD.

IPC分类号： B62D5/07

CPC分类号： B62D5/065

摘要： A power steering unit capable of finely controlling the steering assistance power generated by a hydraulic actuator in accordance with the steering direction and driving condition without requiring a complex structure is provided at low cost.
The right steering assistance power generating state or the left steering assistance power generating state can be alternatively selected by switching the flow path of hydraulic fluid to the hydraulic actuator 10 for generating the steering assistance power with a motor-operated switching valve 23.
The switching valve 23 is controlled so that the steering assistance power acts in accordance with the determined steering direction, and an electric motor 22 for driving a pump 21 is controlled so that the pressure of the hydraulic fluid discharged from the pump 21 is varied in accordance with the determined driving condition.

摘要翻译： 能够以低成本提供能够根据转向方向和驾驶状况精细地控制由液压致动器产生的转向辅助动力而不需要复杂结构的动力转向单元。 通过用电动切换阀23将液压流体的流路切换到用于产生转向辅助动力的液压致动器10，可以选择正确的转向辅助发电状态或左转向辅助发电状态。切换阀 23被控制成转向辅助动力根据所确定的转向方向作用，并且控制用于驱动泵21的电动机22，使得从泵21排出的液压流体的压力根据确定的 驾驶条件。

公开(公告)号：EP1657136A1

公开(公告)日：2006-05-17

申请号：EP04771420.9

申请日：2004-08-09

申请人： Hitachi, Ltd.

发明人： Sasaki, Mitsuo ,  Yokota, Tadaharu ,  Sakaki, Toshimitsu ,  Hiramoto, Michiya

IPC分类号： B62D5/07 ,  B62D6/00

CPC分类号： B62D5/0481 ,  B62D5/065 ,  B62D5/30

摘要： A steering system includes a hydraulic power cylinder 5 that assists a steering force of a rack-and-pinion mechanism 4, and a first hydraulic pressure supply mechanism 8 having a first trochoid pump 23 selectively supplying hydraulic pressure to two hydraulic pressure chambers 15a and 15b of the hydraulic power cylinder via first and second fluid passages 6 and 7, and a first electric motor 24 for the first trochoid pump. When the first hydraulic pressure supply mechanism becomes failed, a second hydraulic pressure supply mechanism 11 is operated responsively to a command signal from a control unit 14 to selectively supply hydraulic pressure via third and fourth fluid passages to either one of the hydraulic pressure chambers.
Thus, it is possible to positively apply a steering assist force by means of the second hydraulic pressure supply mechanism 11, thereby reducing a driver's operating force applied to a steering wheel.

摘要翻译： 转向系统包括辅助齿条齿轮机构4的转向力的液压动力缸5和具有选择性地向两个液压室15a和15b供给液压的第一次摆线泵23的第一液压供给机构8 通过第一和第二流体通道6和7的液压动力缸，以及用于第一次摆线泵的第一电动机24。 当第一液压供给机构发生故障时，响应于来自控制单元14的指令信号响应于第二液压供给机构11而选择性地通过第三和第四流体通路向液压室中的任一个供给液压。 因此，可以通过第二液压供给机构11积极地施加转向辅助力，从而降低驾驶员施加到方向盘的操作力。