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    • 91. 发明专利
    • Hydraulic actuator
    • 液压执行器
    • JPS61119804A
    • 1986-06-07
    • JP24113184
    • 1984-11-15
    • Matsushita Electric Ind Co Ltd
    • FUNADOKORO HIROYUKISEKIGUCHI TAKUYAMARUYAMA TERUO
    • B25J19/00F15B9/08F15B9/09
    • F15B9/09
    • PURPOSE:To reduce a hydraulic actuator in size, and to improve the stability and reliability by disposing an electric motor for driving an input shaft in a housing, and interposing a relative turning angle deviation regulating mechanism between the input shaft and an output shaft. CONSTITUTION:An electric motor comprises an electric motor stator 4 disposed in a housing 1 and a magnet 7 adhering to an input shaft 3, wherein a relative turning angle deviation regulating mechanisms 16, 17 are disposed between the input shaft 3 and an output shaft 2. In this arrangement, the input shaft 3 is not exposed to the outside of the housing 1, and the need of oil seal between the input shaft 3 and the housing 1 and between the input shaft 3 and the output shaft 2 can be eliminated to reduce sliding friction torque of a seal member and lessen the output of the electric motor. Accordingly, a hydraulic actuator is reduced in size. A relative turning angle deviation between the input shaft 3 and the output shaft 2 is regulated to improve the safety and the reliability.
    • 目的:为了减小液压致动器的尺寸,并通过将用于驱动壳体中的输入轴的电动机布置并且在输入轴和输出轴之间插入相对转动角度偏差调节机构来提高稳定性和可靠性。 构成:电动机包括设置在壳体1中的电动机定子4和粘附到输入轴3的磁体7,其中相对转动角度偏差调节机构16,17设置在输入轴3和输出轴2之间 在这种布置中,输入轴3不暴露于壳体1的外部,并且可以消除输入轴3和壳体1之间以及输入轴3和输出轴2之间的油封的需要 降低密封构件的滑动摩擦转矩并减小电动机的输出。 因此,液压致动器的尺寸减小。 调节输入轴3和输出轴2之间的相对转动角度偏差,以提高安全性和可靠性。
    • 92. 发明专利
    • Temperature compensation method of electric-hydraulic controller
    • 电液控制器温度补偿方法
    • JPS5917001A
    • 1984-01-28
    • JP12540882
    • 1982-07-19
    • Komatsu Ltd
    • TORISAKI SHIYUNSUKEHORIKOSHI TOSHIAKIARAKAWA HIDEJI
    • F15B9/09F16K31/06
    • F15B9/09
    • PURPOSE:To control a hydraulic work machine at low temperature, by detecting temperature of working oil in the hydraulic work machine, changing a frequency of an alternating carrier signal on the basis of this detection value, pulse width modulating the signal and controlling a solenoid valve for driving the work machine. CONSTITUTION:A temperature detector 8 detects temperature of working oil in a conduit connected to a port of a hydraulic cylinder 2 and outputs a signal ST to be applied to a voltage-frequency converter circuit 9. The circuit 9 outputs a triangular wave signal Sm'. A position signal of the hydraulic cylinder 2 is added to a position instruction signal at an addition point 1, and deviation epsilon is added to a modulator 5, while a triangular signal Sm is pulse width modulated by the deviation epsilon, and a signal Sc is output and applied to a solenoid valve. When a work machine is used under low temperature environment, a frequency of the signal Sm' is decreased, and a duration time of positive and negative polarity parts of the signal Sc is increased, then the urged time of the solenoid valve 7 is increased while sufficient oil is supplied for operating the hydraulic cylinder 2.
    • 目的:为了控制液压作业机在低温下,通过检测液压作业机械的工作油温度,根据该检测值改变交变载波信号的频率,对信号进行脉宽调制,控制电磁阀 用于驾驶工作机。 构成:温度检测器8检测连接到液压缸2的端口的管道中的工作油的温度,并输出要施加到电压 - 频率转换器电路9的信号ST。电路9输出三角波信号Sm' 。 液压缸2的位置信号被添加到加法点1的位置指令信号,并且偏差ε被加到调制器5,而三角形信号Sm被偏差ε的脉冲宽度调制,信号Sc为 输出并施加到电磁阀。 当在低温环境下使用工作机器时,信号Sm'的频率降低,信号Sc的正极性和负极性部分的持续时间增加,电磁阀7的推压时间增加,同时 供给足够的油来操作液压缸2。
    • 94. 发明公开
    • PNEUMATIC CYLINDER SYSTEM
    • US20240117821A1
    • 2024-04-11
    • US18264989
    • 2022-02-08
    • STACCATO TECHNOLOGIES AB
    • Per-Ove JOHANSSONTwana IBRAHIM
    • F15B9/09F15B11/06
    • F15B9/09F15B11/06
    • A cylinder positioning system (1) comprising a control unit for a pneumatically driven cylinder (14) in a cylinder chamber is provided. The control unit comprising a controller configured to control a set of drive units of the cylinder positioning system. Each drive unit emits a drive current to a respective electromagnetic direct acting valve (9,10, 11, 12) of the cylinder positioning system. Each respective electromagnetic direct acting valve has a closing/opening time of less than 2 ms. The control unit is configured to receive a set position for the cylinder and an actual position for the cylinder, to compare the set position of the cylinder with the actual position of the cylinder and to emit control signals to the drive units to move the cylinder from the actual position towards the set position. By providing a very short time for actuation of the valves, in combination with an actual position for the cylinder a closed loop control can be achieved to control the flow to the actuating cylinder to be proportional over essentially the entire dynamic range of the pneumatic position control system. This in turn can make the control more accurate and robust and with smaller latency.