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    • 33. 发明申请
    • Shelf unit for use in rack for communication equipment
    • 用于通讯设备机架的货架单元
    • US20070039901A1
    • 2007-02-22
    • US10568130
    • 2004-09-24
    • Byung Choi
    • Byung Choi
    • A47F7/00
    • H05K7/1449H04Q1/09H04Q2201/02H04Q2201/12
    • A shelf unit for use in a rack for communication equipment comprising: a front body including a pair of side panels for containing PCBs; a back board detachably mounted to the rear ends of the side panels of the front body; and a rear body including a pair of side panels for containing PCBs. Connecting members are mounted adjacent to the rear ends of the side panels of the front body and protrude outward therefrom. A pair of connecting plates extends forward from the front ends of the respective side panels of the rear body. L-shaped slots are provided at the connecting plates, into which the respective connecting members are fitted.
    • 一种用于通信设备的机架的搁架单元,包括:前体,包括一对用于容纳PCB的侧板; 可拆卸地安装到前身体的侧板的后端的后板; 以及包括用于容纳PCB的一对侧板的后体。 连接构件安装在前体侧面板的后端附近并向外伸出。 一对连接板从后体的各个侧板的前端向前延伸。 L形槽设置在连接板上,相应的连接构件安装在其中。
    • 40. 发明申请
    • Pneumatic servo valve
    • 气动伺服阀
    • US20050062003A1
    • 2005-03-24
    • US10728205
    • 2003-12-03
    • Dong KimWon Hee LeeByung ChoiKwang Kim
    • Dong KimWon Hee LeeByung ChoiKwang Kim
    • F15B13/044F16K11/07F16K27/04F16K31/02F16K31/04F16K31/124F16K37/00
    • F16K27/041F16K11/07F16K27/048F16K31/04Y10T137/86622
    • The present invention relates to a pneumatic servo valve, and more particularly, to a pneumatic servo valve, wherein displacement of a spool due to flow force of a fluid is prevented by firmly holding the spool just after position control for the spool is completed, thereby ensuring the stability of a valve system, and an encoder is employed as a spool position detecting means. The pneumatic servo valve comprises a hollow main body with a supply port, a discharge port and an exhaust port; a sleeve which is contained in a hollow portion of the main body and has slots communicating with the respective ports, and a chamber therein; a spool axially slidably installed within the chamber to control the flow of a fluid into the respective ports according to the position thereof; a torque motor installed at one side of the main body to control the position of the spool in response to electrical signals; and a spool position detecting means for compensating positional errors by receiving the fedback position of the spool. The pneumatic servo valve further comprises a spool holding means including a ball nut 60 which is engaged, via a ball, with a helical groove formed on a connection rod of the spool connected to the torque motor and rotates when the spool moves linearly, and an electronic brake for holding the ball nut not to rotate when the spool is stopped.
    • 气动伺服阀技术领域本发明涉及一种气动伺服阀,更具体地说,涉及一种气动伺服阀,其中通过在阀芯的位置控制完成之后,通过牢固地保持阀芯来防止阀芯由于流体的流动而发生位移,由此 确保阀系统的稳定性,并且使用编码器作为阀芯位置检测装置。 气动伺服阀包括具有供给口,排出口和排气口的中空主体; 套筒,其容纳在主体的中空部分中并且具有与各个端口连通的槽以及其中的室; 轴向可滑动地安装在所述腔室内以根据其位置控制流体进入各个端口的流体; 安装在主体一侧的扭矩马达,以响应于电信号控制线轴的位置; 以及卷轴位置检测装置,用于通过接收卷轴的反馈位置来补偿位置误差。 气动伺服阀进一步包括一个阀芯保持装置,该阀芯保持装置包括一个滚珠螺母60,该滚珠螺母通过一个滚珠与一个形成在连接到转矩马达上的阀芯的连接杆上形成的螺旋槽相接合,当阀芯线性运动时旋转, 当阀芯停止时,用于保持滚珠螺母的电子制动器不旋转。