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    • 4. 发明专利
    • Hydraulic control valve device
    • 液压控制阀装置
    • JP2012197937A
    • 2012-10-18
    • JP2012063458
    • 2012-03-21
    • Linde Material Handling Gmbhリンデ マテリアル ハンドリング ゲゼルシャフト ミット ベシュレンクテル ハフツングLinde Material Handling GmbH
    • KRAFT WOLFGANG
    • F15B11/02
    • F15B11/003F15B2211/30515F15B2211/50527F15B2211/7053
    • PROBLEM TO BE SOLVED: To provide a control valve device capable of avoiding an output loss in control of a counter balance valve while securing stable adjustment characteristics.SOLUTION: In the control valve device 1 for controlling a double-acting hydraulic cylinder 7, a control valve 2 is connected to a carrying pipe line 3 of a pump 4, a tank pipe line 6 leading to a tank 5, and consuming machine pipe lines 8a, 8b leading to a hydraulic cylinder 7, and controlled toward a control position 2b; 2c by a control hydraulic pressure P; P. The consuming machine pipe line 8a; 8b forms a supply side or outflow side connected to the carrying pipe line in the control position, and counter balance valves 15a, 15b are disposed in the consuming machine pipe lines for interrupting the hydraulic cylinder 7. The counter balance valves have interrupting positions 16a, 16b and breakthrough positions 18a, 18b, and the counter balance valve disposed on the outflow side can be operated toward the breakthrough position 18b; 18a by the control hydraulic pressure P; Pof the control valve.
    • 要解决的问题:提供一种能够在确保稳定的调节特性的同时避免控制平衡阀的输出损失的控制阀装置。 解决方案:在用于控制双作用液压缸7的控制阀装置1中,控制阀2连接到泵4的输送管线3,通向罐5的罐管线6,以及 通向液压缸7的机器管线8a,8b,并朝向控制位置2b控制; 2c通过控制液压P A ; P B 。 消耗机管线8a; 8b形成连接到控制位置的输送管线的供给侧或流出侧,并且在平衡阀15a,15b中设置有用于中断液压缸7的消耗机管路。该对位平衡阀具有中断位置16a, 16b和突破位置18a,18b和设置在流出侧的平衡阀可以朝向穿透位置18b操作; 18a通过控制液压P A ; 控制阀的P B 。 版权所有(C)2013,JPO&INPIT
    • 5. 发明专利
    • Hydraulic drive device of hydraulic work machine
    • 液压工程机械液压驱动装置
    • JP2012047298A
    • 2012-03-08
    • JP2010190922
    • 2010-08-27
    • Hitachi Constr Mach Co Ltd日立建機株式会社
    • ISHIKAWA HIROJIKAJITA YUSUKESATAKE HIDETOSHIOKI TAKATOSHI
    • F15B11/028E02F9/22F15B11/00
    • F16H61/4043E02F3/962E02F9/123E02F9/128E02F9/2282E02F9/2285E02F9/2296F15B11/0406F15B2211/20546F15B2211/50527F15B2211/613F15B2211/7058F16H61/4052F16H61/4061
    • PROBLEM TO BE SOLVED: To easily change the drive/brake pressure of a hydraulic swing motor while leaving the structure of a shock-less function as it is, and to change the maximum drive torque and brake torque of the hydraulic swing motor.SOLUTION: In a swing motor unit 4, there are arranged first swing relief valves 44a, 44b having the shock-less functions which limit the drive/brake pressure of the hydraulic swing motor 40 so as not to exceed first set pressure, and second swing relief valves 46a, 46b which limit the drive/brake pressure of the hydraulic swing motor so as not to exceed second set pressure. By switching valves 47a, 47b by operating a relief-pressure change command switch 8, there is selected one of a mode at which the relief characteristic of the first swing relief valve is made effective as it is, and a mode at which there can be obtained a relief characteristic at which the first set pressure of the relief characteristic of the first switch relief valve is lowered to the second set pressure of the second swing relief valve.
    • 要解决的问题:为了容易地改变液压摆动电动机的驱动/制动压力,同时不留下无冲击功能的结构,并且改变液压回转电动机的最大驱动转矩和制动转矩 。 解决方案:在摆动马达单元4中,布置有具有无冲击功能的第一摆动释放阀44a,44b,其限制了液压回转马达40的驱动/制动压力,使其不超过第一设定压力, 以及第二摆动释放阀46a,46b,其限制液压回转马达的驱动/制动压力,以便不超过第二设定压力。 通过操作安全压力改变指令开关8切换阀47a,47b,选择使第一回转溢流阀的溢流特性成为有效的模式中的一种,以及可以存在的模式 获得第一开关安全阀的溢流特性的第一设定压力降低到第二回转溢流阀的第二设定压力的浮力特性。 版权所有(C)2012,JPO&INPIT