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    • 63. 发明授权
    • Chuck for axially clamping a tool to a machine tool spindle
    • 夹具用于将工具轴向夹紧到机床主轴
    • US5035557A
    • 1991-07-30
    • US504313
    • 1990-04-04
    • Johann KohlbauerHorst Jager
    • Johann KohlbauerHorst Jager
    • B23B31/107B23B31/117B23B31/26
    • B23B31/261Y10T409/309464
    • A rotary chuck for axially clamping a tool includes a spindle terminus forming part of a rotary machine tool spindle; a clamping element holder immobilized in the central bore of the spindle terminus; and a plurality of clamping elements circumferentially evenly distributed about the holder. Each clamping element is a one-armed spreading lever having a first end pivotally supported in the holder to provide for a pivotal movement of each clamping element in a plane containing the spindle axis. Each clamping element has a second end having a radially outwardly swung clamping position in which each second end is adapted to be clamped against an inner shoulder of a hollow tool shank received in the spindle bore for axially pulling the tool into engagement with a frontal end face of the spindle terminus. Each second end has a radially inwardly swung releasing position in which the tool is released from the chuck. There is further provided a clamping drive extending coaxially with the spindle axis and being operatively coupled to the clamping elements. The clamping drive is axially movable in a first direction for displacing the clamping elements into the clamping position and in a second direction for displacing the clamping elements into the releasing position.
    • 用于轴向夹紧工具的旋转卡盘包括形成旋转机床主轴的一部分的主轴端头; 固定在主轴终端的中心孔中的夹持元件支架; 以及围绕保持器周向均匀分布的多个夹紧元件。 每个夹紧元件是单臂伸展杆,其具有枢转地支撑在保持器中的第一端,以提供每个夹紧元件在包含主轴轴线的平面中的枢转运动。 每个夹紧元件具有第二端,该第二端具有径向向外摆动的夹持位置,其中每个第二端适于夹紧在容纳在主轴孔中的中空工具柄的内肩上,用于轴向拉动工具与前端面 的主轴终点。 每个第二端具有径向向内摆动的释放位置,其中工具从卡盘释放。 还提供了与主轴相同轴并且可操作地联接到夹紧元件的夹紧驱动器。 夹紧驱动器可沿第一方向轴向移动,用于将夹紧元件移位到夹紧位置,并沿第二方向移动夹紧元件以将夹紧元件移位到释放位置。