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    • 3. 发明授权
    • Hydraulic actuator
    • 液压执行机构
    • US3913448A
    • 1975-10-21
    • US27636972
    • 1972-07-31
    • UNIV LOUGHBOROUGH
    • PRIESTLEY TERENCE PATRICKGARSIDE JOHN DUNCAN
    • D04B15/94F15B11/02F15B13/06F15B21/02F16H43/00
    • F16H43/00D04B15/94F15B11/02F15B13/06F15B21/02F15B2211/30505F15B2211/30525F15B2211/30585F15B2211/321F15B2211/7055
    • A hydraulic actuator comprises a cylinder containing a doubleacting piston, a port adjacent each end of the cylinder and a piston-controlled intermediate port opened by the piston in moving to an intermediate position, each of the ports being connected to progressively adjustable valve means (for example a continuously rotatable valve means) coupled to operate in timed relationship to one another. The hydraulic actuator may also include a second cylinder containing a second piston which carries a probe extending axially into the first cylinder to abut the first-mentioned piston and having a port connected to continuously rotatable valve means arranged to operate in timed relationship to the first-mentioned valve means. There is also described a knitting machine including a plurality of needles, a separate hydraulic actuator for each needle of the machine, and on-off valve means for controlling supply of hydraulic fluid under pressure to the hydraulic actuators to operate hydraulic actuators in sequence to effect a knitting operation. The said valve means may be arranged to operate actuators of needles at spaced location simultaneously and the actuators of each of a number of groups of actuators sequentially. Each of the hydraulic actuators may be of the kind described above.
    • 液压致动器包括一个包含双作用活塞的缸体,与气缸两端相邻的一个端口以及活塞控制的中间端口,活塞在中间位置上移动,每个端口连接到可逐渐调节的阀装置 (例如可连续旋转的阀装置),其以相互间的定时关系操作。 液压致动器还可以包括第二气缸,该第二气缸包含第二活塞,第二活塞承载着一个轴向延伸到第一气缸中以抵靠第一个活塞的探头,并具有连接到可连续旋转的阀装置的端口,该端口设置成与第一气缸的定时关系运行, 上述阀装置。
    • 7. 发明授权
    • Impact hydraulic forming device
    • 冲击液压成型装置
    • US3721091A
    • 1973-03-20
    • US3721091D
    • 1971-04-23
    • TOKYU CAR CORP
    • TOMINAGA HTAKAMATSU M
    • B05B12/06F01B17/00F01B17/02F01L25/06F04B7/04F04B9/125F15B11/072F15B7/00
    • F15B11/072B05B12/06F01B17/00F01B17/02F01L25/066F04B7/04F04B9/125F15B2211/20576F15B2211/30525F15B2211/321F15B2211/40515F15B2211/424F15B2211/455F15B2211/7725F15B2211/8855Y10T137/7722
    • An impact hydraulic forming device has a hydraulic pressure chamber with a bore filled with water, and a plunger is arranged to be thrust into the bore by a hammer which is unitary with the plunger and which is reciprocable in a cylinder. Means are provided to direct a jet of water across the open end of the bore in such a way as to seal the water in the bore from flowing out of the bore, to provide a water membrance. The face of the hammer joined to the plunger has an annular recess of curvilinear cross section whose surface merges smoothly with the exterior surface of the plunger, and air jet means are arranged to be directed against this annular groove to retract the hammer. The hammer is advanced under air pressure for a pair of its stroke after which the pressure air is shut off and the advance of the hammer is carried out by expansion of the air in the cylinder. The air jets directed against the recessed end face of the hammer are also shut off after the hammer has completed part of its return stroke, with the return stroke being completed due to the expansion of the air jetted into the cylinder. Valve means control reciprocation of the hammer, and the valve means may be flow pressure operated valves of may be solenoid valve controlled by an electrical control device.
    • 冲击液压成型装置具有一个具有充满水的孔的液压室,并且柱塞被布置成通过与柱塞一体的锤子推入孔中并且可以在气缸中往复运动。 提供了用于引导水射流穿过孔的开口端的方式,以便密封孔中的水从孔中流出以提供水膜。 连接到柱塞的锤的表面具有曲面横截面的环形凹槽,其表面与柱塞的外表面平滑地并入,并且空气喷射装置被布置成被引导抵靠该环形槽以收回锤。 锤子在空气压力下进行一次行程,之后关闭压力空气,并且通过气缸中的空气膨胀来进行锤子的前进。 在锤完成部分返回行程之后,引导锤头凹入端面的空气射流也被切断,由于喷射到气缸中的空气膨胀,返回冲程完成。 阀门意味着控制锤的往复运动,并且阀装置可以是可由电控制装置控制的电磁阀的流量调节阀。