| 摘要 |
<p>The carrier has at least one shaft (26), a boss (80) supporting the tool and a shear member (88). The shear member is in firm but releasable engagement with the shaft and also with the boss. The shear member is ring-shaped with an opening. On the wall of the opening, drivers are formed as inner teeth, which engage with an outer toothed area (86) of the shaft. The shear member has external teeth which engage with the boss. The drivers are shorter than the teeth of the outer tooth area. The drivers extend ring-shaped into axially opening recesses (94) in the boss. The drivers have a cylindrical cross-section and the recesses are formed correspondingly to this cross-section.</p> |
