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    • 1. 发明授权
    • Power draw bar
    • 电力拉杆
    • US4589808A
    • 1986-05-20
    • US671924
    • 1984-11-16
    • Charles A. O'Connor
    • Charles A. O'Connor
    • B23B31/26B23C5/26B23B31/10
    • B23B31/265B23B31/266B23B2270/20Y10T408/957Y10T409/309464
    • An automatic draw bar for removably securing machine tools carried by a tool holder within the spindle of a milling machine or the like, in which the tool holder is formed with an internally threaded bore. The spindle is provided with an elongated bore having a recess at its end to receive the shank of the tool holder. A hollow draw bar is slidably carried within the spindle and is exteriorly threaded at one end with a thread engagable with the tool holder interior thread. An elongated draw bar expander slidably carried within the draw bar and responsive to a source of linear power is adapted to couple the threads on the draw bar and tool holder to draw the tool holder into frictional engagement with the spindle upon activation of the power source.
    • 一种自动牵引杆,用于可拆卸地固定由工具架在铣床等的主轴内承载的机床,其中工具架形成有内螺纹孔。 主轴设置有细长的孔,在其端部具有凹部以容纳工具架的柄。 一个空心拉杆可滑动地承载在主轴内,并且在一端具有外螺纹,并具有可与工具架内螺纹接合的螺纹。 可滑动地承载在牵引杆内并且响应于线性动力源的细长拉杆膨胀器适于联接拉杆和工具夹具上的螺纹,以在启动动力源时将工具架与主轴摩擦接合。