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1. 发明授权

EP2115305B1 HYDRAULISCHER ANTRIEB, INSBESONDERE FÜR WERKZEUGMASCHINEN, UND VERFAHREN ZUM STEUERN DES HYDRAULISCHEN ANTRIEBS 有权
标题翻译：液压驱动装置，特别是用于工具机的液压驱动装置以及用于控制液压驱动装置的方法
公开(公告)号：EP2115305B1
公开(公告)日：2018-03-21
申请号：EP08758919.8
申请日：2008-05-31
申请人： Voith Patent GmbH
发明人： BRAHMER, Bert
IPC分类号： F15B11/044 , B30B15/22
CPC分类号： F15B11/044 , B30B15/16 , F15B2211/20538 , F15B2211/212 , F15B2211/30525 , F15B2211/3144 , F15B2211/31576 , F15B2211/40507 , F15B2211/40515 , F15B2211/41527 , F15B2211/428 , F15B2211/46 , F15B2211/50536 , F15B2211/5151 , F15B2211/55 , F15B2211/7053

2. 发明授权

EP3165496B1 INDUSTRIAL VEHICLE 有权
公开(公告)号：EP3165496B1
公开(公告)日：2018-03-14
申请号：EP16196817.7
申请日：2016-11-02
申请人： Kabushiki Kaisha Toyota Jidoshokki
发明人： Goto, Tetsuya , Hagino, Kenichi , Kuwano, Yasushi , Nibe, Akihito , Nakajima, Shigeto , Takano, Satoshi
IPC分类号： B66F9/22 , E02F9/22
CPC分类号： F15B1/26 , B66F9/22 , E02F9/2228 , E02F9/2267 , F15B13/024 , F15B2211/255 , F15B2211/40592 , F15B2211/55
摘要： When an engine stall is likely to occur, the pressure of the back pressure chamber of a relief pressure valve is released to adjust the relief pressure of the relief pressure valve. This actuates a pressure compensating circuit to release the pressure in a control circuit to an oil tank. Thus, a rapid increase of the pressure due to a cargo handling operation is restricted, and an engine stall due to insufficient torque of the engine is avoided.

3. 发明公开

EP3277986A1 DRAIN VALVE 有权转让
标题翻译：排水阀
公开(公告)号：EP3277986A1
公开(公告)日：2018-02-07
申请号：EP16713456.8
申请日：2016-04-01
申请人： Punch Powertrain N.V.
发明人： SMID, Peter Mark , VAN RAEMDONCK, Stefan Hubertus Godelieve
IPC分类号： F16H61/00 , F16H61/02
CPC分类号： F16D25/123 , B60T13/12 , B60T15/02 , F15B11/16 , F15B13/024 , F15B13/06 , F15B2211/30525 , F15B2211/50518 , F15B2211/50536 , F15B2211/5157 , F15B2211/528 , F15B2211/55 , F15B2211/575 , F15B2211/6355 , F15B2211/67 , F15B2211/863 , F15B2211/8633 , F15B2211/8752 , F16D25/14 , F16D67/04 , F16H61/0021 , F16H61/0025 , F16H61/0206
摘要： A hydraulic system for a multiple friction transmission, comprising: a first pressure relief valve 5 regulable by means of a first pilot pressure; a normally-open drain valve 8, which is a directional valve switchable between an open state and a closed state by means of a second pilot pressure; at least one first pressure regulator 11 for operating the drain valve by means of a first pilot pressure and a second pilot pressure, respectively; wherein in the event of detrimental hydraulic pressure build up, the second pilot pressure is dropped to open the drain valve, so as to relieve pressure through the drain line.

4. 发明公开

EP3225752A2 HYDRAULIC SYSTEM FOR WORK MACHINE 有权
标题翻译：工作机液压系统
公开(公告)号：EP3225752A2
公开(公告)日：2017-10-04
申请号：EP16206929.8
申请日：2016-12-27
申请人： KUBOTA CORPORATION , KYB Corporation
发明人： TANAKA, Yoshimitsu , BITO, Kunihiko , HARAGUCHI, Tsukasa , OTANI, Toshiaki , KAWANO, Yuji , KUMATANI, Masaru , MAEDA, Junki , KAWANO, Shoichi , IWAMURA, Hitoshi , KUNIZAWA, Teruo , WAKASUGI, Takehiro , MATSUURA, Akio
IPC分类号： E02F9/22
CPC分类号： F15B11/168 , E02F3/422 , E02F9/2221 , E02F9/2239 , E02F9/2246 , E02F9/2285 , E02F9/2289 , E02F9/2292 , E02F9/2296 , F15B1/26 , F15B11/10 , F15B21/044 , F15B2211/35 , F15B2211/55 , F15B2211/7052 , F15B2211/7058 , F15B2211/71 , F15B2211/78
摘要： A hydraulic system for a work machine includes a first switch valve and a first return circuit. The first switch valve has a confluent position to connect a first operation fluid tube to a second operation fluid tube and to connect a first transmission fluid tube to a second transmission fluid tube and an isolation position to release the connection between the first operation fluid tube and the second operation fluid tube and to release the connection between the first operation fluid tube and the second operation fluid tube, the first switch valve being configured to be switched to the confluent position and to the isolation position.
摘要翻译：用于作业机械的液压系统包括第一转换阀和第一回路。第一转换阀具有汇合位置以将第一操作流体管连接到第二操作流体管并且将第一变速器流体管连接到第二变速器流体管和隔离位置以释放第一操作流体管和第二操作流体管并释放第一操作流体管和第二操作流体管之间的连接，第一开关阀构造成切换到汇合位置和隔离位置。

6. 发明公开

EP2792797A4 WORKING VEHICLE 失效转让
公开(公告)号：EP2792797A4
公开(公告)日：2015-09-30
申请号：EP12856890
申请日：2012-12-12
申请人： YANMAR CO LTD
发明人： SAKAMOTO KUNIHIKO
IPC分类号： E02F9/22 , E02F9/20 , F04B1/29 , F04B49/08 , F15B11/028 , F15B11/042
CPC分类号： F04B1/324 , E02F9/2079 , E02F9/2235 , E02F9/2246 , E02F9/226 , E02F9/2282 , E02F9/2285 , E02F9/2292 , E02F9/2296 , F04B1/29 , F04B1/32 , F04B17/05 , F04B49/065 , F04B49/08 , F04B49/20 , F04B2203/0209 , F15B11/0423 , F15B20/007 , F15B2211/20523 , F15B2211/20538 , F15B2211/20546 , F15B2211/20576 , F15B2211/30595 , F15B2211/50518 , F15B2211/50536 , F15B2211/5157 , F15B2211/526 , F15B2211/55 , F15B2211/633 , F15B2211/6346 , F15B2211/6652 , F15B2211/86
摘要： The present invention addresses the problem of being able to increase the effect of preventing an engine from stalling by reducing the engine load attributable to a fixed-capacity hydraulic pump. A working vehicle (1) provided with a fixed-capacity hydraulic pump (23) driven by power from an engine (9) and a working hydraulic actuator (7, 13, 14, 15, 18) driven by working oil pumped from the fixed-capacity hydraulic pump (23) is a rotary working vehicle (1) which is provided with a pressure modifying means (43) for modifying the pressure of working oil from the fixed-capacity hydraulic pump (23), and the rotary working vehicle (1) is such that if the actual number of revolutions (N) of the engine (9) is reduced by a set number of revolutions (Ns) as the load on the engine (9) increases, then the pressure modifying means (43) operates in accordance with the deviation (e) between the actual number of revolutions (N) of the engine (9) and the specified number of revolutions (Ns), and the pressure of the working oil from the fixed-capacity hydraulic pump (23) is modified.

7. 发明公开

EP2700825A4 OIL PRESSURE CIRCUIT 有权
标题翻译：油压控制电路
公开(公告)号：EP2700825A4
公开(公告)日：2015-09-16
申请号：EP12873485
申请日：2012-04-03
申请人： BOSCH REXROTH CORP
发明人： MATSUSHIMA NOBUHISA
IPC分类号： F15B11/02 , F15B11/042 , F15B13/02 , F15B15/02 , F15B15/20 , F16K17/06 , F16K17/30
CPC分类号： F15B15/20 , F15B11/0423 , F15B13/024 , F15B15/02 , F15B2211/20553 , F15B2211/3111 , F15B2211/50518 , F15B2211/528 , F15B2211/55 , F15B2211/6346 , F15B2211/6652 , F16K17/06 , F16K17/30
摘要： There is provided a hydraulic circuit which can further improve a responsive characteristic in a pressure reducing operation and a reliability in the pressure reducing operation of a relief valve device, when a main circuit pressure exceeds a predetermined pressure. A relief valve device for reducing the main circuit pressure in the hydraulic circuit including a hydraulic pump includes a first valve unit having a pilot spool and a pilot spring, a position of the pilot spool being determined by a balance between a throttle pressure supplied from the main circuit via a throttle oil passage and the control pressure and a biasing force of the pilot spring, and releasing the main circuit pressure outward via the throttle oil passage, and includes a second valve unit having a valve piston and a valve spring, a position of the valve piston being determined by a balance between the main circuit pressure and the throttle pressure and the biasing force of the valve spring, and releasing the main circuit pressure outward.

8. 发明授权

EP1387090B1 Hydraulischer Antrieb 有权
标题翻译：液压驱动
公开(公告)号：EP1387090B1
公开(公告)日：2014-04-30
申请号：EP03015768.9
申请日：2003-07-10
申请人： Bosch Rexroth AG
发明人： Bökmann, Michael , Gwozdz, Norbert
IPC分类号： F15B11/042 , F15B1/027 , F15B15/14 , B21D5/00
CPC分类号： B21D5/02 , B21D5/00 , F15B1/027 , F15B11/0423 , F15B11/0426 , F15B15/1476 , F15B2211/20515 , F15B2211/20538 , F15B2211/20584 , F15B2211/30505 , F15B2211/40515 , F15B2211/41536 , F15B2211/473 , F15B2211/50518 , F15B2211/50536 , F15B2211/5151 , F15B2211/5153 , F15B2211/55 , F15B2211/6336 , F15B2211/6651 , F15B2211/7053 , F15B2211/75

9. 发明公开

EP2700825A1 OIL PRESSURE CIRCUIT 有权
标题翻译： ÖLDRUCKKREISLAUF
公开(公告)号：EP2700825A1
公开(公告)日：2014-02-26
申请号：EP12873485.2
申请日：2012-04-03
申请人： Bosch Rexroth Corporation
发明人： MATSUSHIMA Nobuhisa
IPC分类号： F15B11/02 , F16K17/06
CPC分类号： F15B15/20 , F15B11/0423 , F15B13/024 , F15B15/02 , F15B2211/20553 , F15B2211/3111 , F15B2211/50518 , F15B2211/528 , F15B2211/55 , F15B2211/6346 , F15B2211/6652 , F16K17/06 , F16K17/30
摘要： There is provided a hydraulic circuit which can further improve a responsive characteristic in a pressure reducing operation and a reliability in the pressure reducing operation of a relief valve device, when a main circuit pressure exceeds a predetermined pressure.
A relief valve device for reducing the main circuit pressure in the hydraulic circuit including a hydraulic pump includes a first valve unit having a pilot spool and a pilot spring, a position of the pilot spool being determined by a balance between a throttle pressure supplied from the main circuit via a throttle oil passage and the control pressure and a biasing force of the pilot spring, and releasing the main circuit pressure outward via the throttle oil passage, and includes a second valve unit having a valve piston and a valve spring, a position of the valve piston being determined by a balance between the main circuit pressure and the throttle pressure and the biasing force of the valve spring, and releasing the main circuit pressure outward.
摘要翻译：提供了一种液压回路，当主回路压力超过预定压力时，能够进一步提高减压操作中的响应特性和安全阀装置的减压操作的可靠性。用于降低包括液压泵的液压回路中的主回路压力的安全阀装置包括具有先导阀芯和先导弹簧的第一阀单元，先导阀芯的位置由从通过节流油通道的主回路和控制压力和先导弹簧的偏压力，并经由节气门油路向外释放主回路压力，并且包括具有阀活塞和阀弹簧的第二阀单元，位置阀活塞由主回路压力和节气门压力和阀弹簧的偏压力之间的平衡决定，并且将主回路压力向外释放。

10. 发明授权

EP1915538B1 SCHALTUNG ZUR ANSTEUERUNG EINES DOPPELTWIRKENDEN HYDRAULISCHEN ANTRIEBSZYLINDERS 有权
标题翻译：电路，用于控制双作用液压油缸驱动
公开(公告)号：EP1915538B1
公开(公告)日：2012-04-04
申请号：EP06701053.8
申请日：2006-01-27
申请人： Bucher Hydraulics AG
发明人： HRISTOV, Ivan , ZÜRCHER, Josef
IPC分类号： F15B11/044 , F15B11/024
CPC分类号： F15B11/003 , B66F9/22 , E02F9/2203 , F15B11/024 , F15B13/021 , F15B2211/30505 , F15B2211/3051 , F15B2211/30515 , F15B2211/30525 , F15B2211/3058 , F15B2211/3127 , F15B2211/3144 , F15B2211/31576 , F15B2211/31588 , F15B2211/329 , F15B2211/351 , F15B2211/353 , F15B2211/50518 , F15B2211/55 , F15B2211/88
摘要： The invention relates to a circuit for controlling a double-action hydraulic drive cylinder (1), which is controlled by a directional control valve (5) equipped with working connections (A, B). Hydraulic fluid can be fed to a piston chamber (11), whereas hydraulic oil simultaneously discharges from a rod chamber (12), and hydraulic fluid can be fed to a rod chamber (12), whereas hydraulic oil simultaneously discharges from a piston chamber (11). The invention is characterized in that: the piston chamber (11) is connected to the rod chamber (12) via a parallel connection consisting of a pressure limiting valve (21) and of a controllable load maintaining valve (26) and via an automatic regeneration check valve (22) arranged parallel thereto; a first pretensioning valve (24) and an automatic by-pass check valve (28) situated antiparallel thereto are arranged between the connection point between the pressure limiting valve (21), load maintaining valve (26), the regeneration control valve (22) and the working connection (A) of the directional control valve (5); and another pretensioning valve (30; 45) is arranged inside a line between the rod chamber (12) and a tank in a series connection with the directional control valve (5). The invention enables a regeneration from the piston chamber (11) to the rod chamber (12) whereby reducing the power requirement for operating the pump.

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