Assigned torsion nut

Abstract

A specified torque nut, which is suitable for tightening fittings, etc., can only be tightened to the specified tightening torque, and can be checked at a glance whether the tightening is complete or not. The torque operation part with the tool locking surface on the outside is integrally formed with the nut body with the female thread hole, and the torque operation part has a non-circular hole concentric with the female thread hole and larger in diameter than the female thread hole from the end surface to the nut body , At the junction between the nut main body and the torque operating part, there is a torque limiting part that surrounds the non-circular hole and includes at least two weak parts.

Description

technical field [0001] The present invention relates to nuts, in particular nuts for which a tightening torque can be specified. Background technique [0002] Often in many occasions, the nuts are screwed in and tightened in a state where the bolts or threaded shafts do not rotate. [0003] As an example thereof, for example, a roll-up fitting. This is for connecting hoses to other hoses or equipment, and is used to secure coupling parts in the form of collars and flanges to hose ends. [0004] This type of tightening fitting, as can be understood with reference to the prior art (Fig. 28), consists of a shrinkable ring, a baffle and a nut, wherein the shrinkable ring is to be formed with a male thread within the required range of the two free ends. The wire is wound 1.5 times, and the two ends are extended in the same direction; the baffle has a curved surface corresponding to the curvature of the wire, and guide cylinders are formed on both ends to allow the above-mention...

AI Technical Summary

Problems solved by technology

However, with such a nut, the adjustment of the tightening torque depends entirely on the operator's experience and feeling. Therefore, due to insufficient tightening torque, the fixing of the tightening fitting and the joint part is not tight enough, and the joint part is easily disengaged, or High pressure fluid leaks out

Or, on the contrary, if the tightening torque is too large, the hose will be cracked, broken or damaged. In this way, high-pressure fluid may be ejected and cause a major accident.

In addition, there is a possibility of damage to the female and male threads due to the application of excessive torque

Images