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    • 7. 发明公开
    • BOHRKRONE MIT EINEM AUSTAUSCHBAREN SCHNEIDABSCHNITT
    • EP3083116A1
    • 2016-10-26
    • EP14812557.8
    • 2014-12-17
    • Hilti Aktiengesellschaft
    • HOOP, Matthaeus
    • B23B51/04
    • B23B51/0473B23B51/0406B23B51/0466B23B2240/04B23B2240/32B23B2251/02B23B2251/50B23B2260/072B28D1/041Y10T408/895
    • Drill bit (10) which is rotatable about a rotation axis (22), having a first drill bit portion which is configured as a cutting portion (11) and has an annular portion (13) which is connected at one end to one or more cutting elements (14) and at another end has a first connecting device (15), and a second drill bit portion which is configured as a drilling shank portion (12) and has a cylindrical drilling shank (16) which has a second connecting device (17) at an end facing the cutting portion (11). The first and second connecting devices (15, 17) form a releasable connection in the connected state and ensure force and torque transmission from the drilling shank portion (12) to the cutting portion (11). The cutting portion (11) has a third connecting device (31) different from the first connecting device (15), and the drilling shank portion (12) has a fourth connecting device (32) different from the second connecting device (17), wherein the third and fourth connecting devices (31, 32) form a form-fitting connection between the cutting portion (11) and the drilling shank portion (12) in the connected state in an axial direction parallel to the rotation axis (22).
    • 公开了可围绕旋转轴线旋转的钻头。 所述钻头具有被配置为切割部分的第一钻头部分,并且具有在一端连接到一个或多个切割元件的环形部分,并且在另一端处连接有第一连接装置。 钻头具有构造为钻杆部分的第二钻头部分,并且具有圆柱形钻杆轴,其一端具有第二连接装置。 处于连接状态的第一和第二连接装置形成可拆卸连接,并且从钻杆部分到切割部分发生力传递和扭矩传递。 切割部具有第三连接装置,钻杆部具有第四连接装置。 连接状态的第三连接装置和第四连接装置在与轴线平行的轴向方向上形成形状配合连接。