Nut and bolt arrangement, comprises nut with larger diameter thread than the bolt and this nut is mounted in a casing and connected to wrap spring brakes

摘要

The nut (D) is rotatably mounted in a nut casing (E) via two bearings (F1, F2) and has a thread diameter greater than that of the bolt (C). Two wrap spring brakes (H1, H2) are secured to the nut to provide braking in both the clockwise and anti-clockwise directions. The nut and bolt central axes extend parallel to each other, separated by a distance equal to half the difference in thread diameter.