| 摘要 |
Device (10, 20, 30) and method for tightening a bolt (2) or a nut (12) threaded on its end, which end extends through at least a first body (3) and screws into a hole (5) in a second body (4) or extends through the second body into another nut (13). The device has gripping means (7, 17) co-acting with the bolt-head or the nuts. Means (8) process a signal generated by sensor means (18) subject to the axial force exerted on the surface of the first body by the bolt-head or the first nut, or on the surface of the second body by the second nut, and control the device such that the bolt-head or a nut is tightened subject to the axial force exerted on the surface-of one of the bodies, which sensor means are in an annular body (16) around the threaded hole between the bolt-head or first nut and the first body or between the second nut and second body. |
