Screw Nut With Bent Annular Collar for Secure Clamping
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Solution Overview
Problem
Existing screw nuts face challenges in efficient operation and complex manufacturing processes, particularly in achieving a secured thread effect without intricate metal-cutting or removal of thread parts.
Innovation Solution
An annular collar is integrally formed and bent cross-sectionally to create an accommodating slot around the threaded bore, with a thread offset in the end region to provide a resilient securing effect when screwed onto a bolt or screw, using a tool for deformation and thread formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an annular collar is bent and compressed to create a spring effect for securing the nut, then the securing effect is improved, but the manufacturing complexity increases due to requiring metal-cutting operations and thread removal
Solution Approach 1:
The patent divides the nut structure into distinct functional zones: an uninterrupted thread portion for load-bearing and a separate collar portion with cutouts for spring effect generation. This segmentation allows each part to be optimized independently - the thread remains continuous for strength while the collar provides securing through controlled deformation
Solution Approach 2:
The collar is pre-formed with specific cutouts and geometric features during the threading process itself, before the final tightening operation. This preliminary structuring enables the collar to automatically generate the required spring effect and offset when compressed, eliminating the need for subsequent complex metal-cutting operations
2Reliability
If traditional methods are used to create a spring effect by removing thread parts or walls, then the securing effect is achieved, but the production time increases
Solution Approach 1:
The patent combines multiple operations into a single threading process. The collar with its spring effect features, the thread formation, and the initial compression structure are all created simultaneously during thread cutting, rather than requiring separate metal-cutting and deformation steps. This integration dramatically reduces production time while maintaining the securing effect
Solution Approach 2:
The invention changes the geometric parameters of the collar during the threading process itself - specifically creating controlled cutouts and thickness variations in the collar portion. These parameter changes enable the spring effect to be generated through simple compression rather than requiring complex subsequent operations, thereby increasing production speed
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables a simple and quick production of screw nuts with a secure clamping force on thread flanks, reducing manufacturing complexity and achieving a resilient securing effect with minimal thread offset, enhancing operational efficiency.
Implementation Method 1
an annular collar is integrally formed on one of the end faces of the screw nut and is bent cross-sectionally towards the axis in such a way that, with a section of this end face which surrounds the threaded bore as a bearing face, it delimits an accommodating slot
Implementation Method 2
the annular collar is subjected to upset forging in an end region at its upper edge during the deformation
Data Source
AI summary
A screw nut from a metal material, which comprises a tapped hole and an inner groove which radially extends in relation to the longitudinal axis thereof. An annular collar is formed onto one of the faces of the screw nut and its cross-section is bent in the direction of the axis to such a degree as to delimit, together with a section of the face surrounding the tapped hole as a contact surface, a receiving slot that is directly associated therewith.