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    • 7. 发明公开
    • SCHRAUBENANTRIEB
    • EP3003645A1
    • 2016-04-13
    • EP14736302.2
    • 2014-06-05
    • EJOT GmbH & Co. KG
    • LANDSMANN, Nils
    • B25B15/00
    • The invention relates to a screw (10) with a screw head having a drive (12), wherein the drive (12) comprises cams (14a, 14b, 14c) formed by recesses introduced into the screw head around the cams (14a, 14b, 14c), wherein each cam has two side faces (18a, 18b), which are used for transmitting rotational motion, and an end face (16a, 16b, 16c) connecting the side faces (18a, 18b), the end face (16a, 16b, 16c) having a concave surface contour on the end of the screw head facing away from the screw shank. The invention is characterized in that the end face (16a, 16b, 16c) is designed such that a virtual circular periphery (20a, 20b) around the screw axis in a plane orthogonal to the screw axis and having a radius associated with the plane has a point of contact (22a, 22b, 22c) on the cam with the end face (16a, 16b, 16c). Over at least one portion of the axial height of the end face (16a, 16b, 16c) – the contact region – a plurality of such points of contact (22a, 22b, 22c) are formed, said points of contact (22a, 22b, 22c) forming a contact line (24a, 24b, 24c) in the centre of the end face (16a, 16b, 16c).
    • 本发明涉及一种具有驱动装置的螺钉头和相应的驱动工具的螺钉,以及具有螺钉和驱动工具的驱动系统。 螺钉包括具有驱动器的螺钉头; 驱动器包括由引导在螺钉头周围的凸轮的凹部形成的凸轮。 每个凸轮具有用于传递扭矩的两个侧面和连接侧面的端面。 端面在螺钉头的远离螺杆的端部具有凹面轮廓。 端面在垂直于其的平面中具有绕螺杆轴线的虚拟圆形周边,并且具有与该平面相关联的半径在凸轮与端面具有接触点。 在端面的轴向高度的至少一部分上,多个接触点在端面的中心形成接触线。 驱动工具包括具有向外部径向延伸的整体夹带元件的基本主体。 导入用于驱动螺钉的末端的基体形成朝向尖端逐渐变细的圆锥形部分。