示出并描述为包括一个壳体上的夹紧装置（2），包括：壳体（2）可旋转地安装心轴（3）和具有弹性的夹紧部件（4），其中所述夹紧构件（4）通过从第一位置施加力， 其中心轴（3）可在第二位置转动，在第二位置中心轴（3）被夹紧元件（4）夹紧。 利用本发明的夹紧装置高夹持力或保持的时刻，所述夹紧元件（4）周围的一方面，待夹紧的主轴（3）内筒（5），与内筒（5）同轴，可以用简单的结构设计特征来实现，设置外筒（6） 以及具有内筒（5）和（6）将所述膜片（7）的外筒，该夹紧元件（4）形成大致罐形，其中，在所述夹持部件的中心（4）通过内筒（5）中形成开口 围绕被夹持心轴（3），并且所述夹紧元件（4）被布置和设计成使得由夹紧元件的致动（4）上的力，膜片的曲率（7）是可改变的，曲率的方法，其中的改变 所述隔膜（7）改变所述内缸（5）的夹紧部分（8）或所述外缸（6）的夹紧部分（9,22）或所述隔膜 原因跑（7）到所述心轴（3），从而通过作用在夹紧元件（4）上的力，所述心轴（3）通过夹紧元件（4）夹持或所述心轴（3）的夹紧被解除。

Shown and described is a clamping device with a housing (2), having a housing (2) rotatably mounted spindle (3) and with an elastic clamping member (4) wherein the clamping member (4) by applying a force from a first position, in which the spindle (3) is rotatable, is clamped to a second position in which the spindle (3) by the clamping element (4) can be moved. The clamping device according to the invention high clamping forces or holding torques can in simple structural design be achieved that the clamping element (4) a to clamping spindle (3) surrounding the inner cylinder (5), a coaxially with the inner cylinder (5) arranged outside the cylinder (6) and the inner cylinder (5) and the outer cylinder (6) connecting the diaphragm (7), in that the clamping element (4) is formed approximately pot-shaped, wherein at the center of the clamping member (4) through the inner cylinder (5) is formed an opening which surrounds the to be clamped spindle (3), and that the clamping element (4) is arranged and designed such that by acting on the clamping element (4) with a force, the curvature of the diaphragm (7) is changeable, wherein a change of the curvature the membrane (7) causes a change in the distance of a clamping section (8) of the inner cylinder (5) or a clamping portion (9, 22) of the outer cylinder (6) or the diaphragm (7) to the spindle (3), so that by acting on the the clamping element (4) is clamped with a force, the spindle (3) by the clamping element (4) or a clamping of the spindle (3) is released.