| 摘要 |
<p>The particular characteristic of this new self-locking nut are summarised here below: both radial and axial blockage on the screw at the termination of screwing. The blocking load is variable on the screw thread deriving from the pressure of the nut on the supporting surface during the tightening process. The nut runs freely along the screw thread until contact with the supporting surface; sure fit of the geometrical profiles of the screw thread and nut within the normal clearance allowance of working, without excessive axial tension of the screw. All the screw threads are blocked both axially and radially with a growing load according to the advancement during the stage of tightening; two different types of nut have been designed utilising the same functions that permit a low torque and high torque of screwing (see Figs. 1 and 2); the self-locking nut is specific for particular junction composed of different structures. Materials of low hardness such as thermoplastic and thermo-resines etc; the structure of the nut in two pieces consents an assembly with different materials, both metallic and non metallic. It can be produced in all materials and also of two different materials; the shape and dimension of the nut allows use with other common nuts, wrench and spanners, and normal working tools; the self-locking nut can be used with all types of screw threads, and transformed into other types of nuts such as micro-nuts and those differing from the usual exagonal shape.</p> |
