Dual-Thread Screw Locking Structure for Temporary Hold and Auto-Stop
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Solution Overview
Problem
Current screw locking elements cannot be temporarily held to a heat dissipating unit before connection and are difficult to remove if damaged, leading to inefficiencies in assembly and potential damage to threads during tightening.
Innovation Solution
A screw locking unit structure featuring a screw main body with differently structured male threads and an elastic element, allowing temporary holding and automatic stopping to prevent over-tightening, with the ability to be easily exchanged if damaged.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the screw locking element is extended through a locating element with a sleeve for temporary holding, then the screw locking element can be temporarily held before connection, but it becomes impossible to remove the damaged screw locking element from the sleeve for reworking or changing
Solution Approach 1:
The screw locking element is divided into two distinct screw locking sections: a first screw locking section with a first male thread for engaging the locating element, and a second screw locking section with a second male thread for engaging the object. This segmentation allows the first section to provide temporary holding while the second section enables final connection, and if damaged, only the screw locking element can be removed and replaced without affecting the locating element.
Solution Approach 2:
The invention extracts the removable function from the locating element by placing it on the screw locking element itself. The first male thread on the screw locking element engages with the locating element, making the screw locking element the removable component rather than the locating element. This allows easy replacement of the screw locking element if damaged while keeping the locating element fixed on the heat dissipating unit.
2Productivity
If electric tools are used to tighten the screw locking element quickly, then assembling speed is improved, but the screw locking element is easily subjected to excessive tightening to damage the male thread
Solution Approach 1:
The first male thread on the screw locking element engages with the locating element in advance to provide preliminary anti-action. This preliminary engagement prevents the screw locking element from being excessively tightened or falling out during the assembly process. The locating element acts as a preliminary constraint that protects the threads from damage while allowing quick assembly with electric tools.
Solution Approach 2:
The locating element is fitted on the heat dissipating unit in advance, and the first male thread of the screw locking element is designed to engage with this pre-installed locating element. This preliminary action establishes a controlled engagement path that prevents excessive tightening before the final connection is made, enabling safe use of electric tools for quick assembly.
3Stability of the object's composition
If the screw locking element is tightly fitted to the heat dissipating unit with a locating element, then the screw locking element is axially limited from displacing or falling, but it cannot be removed if damaged for reworking
Solution Approach 1:
The screw locking element is segmented into a first screw locking section for engaging the locating element and a second screw locking section for engaging the object. This segmentation allows the first section to provide axial limitation and stability while the second section enables final connection. If damaged, the entire screw locking element can be removed from the locating element and replaced without affecting the stability-providing first section's engagement design.
Solution Approach 2:
The invention creates a dynamic assembly process where the screw locking element transitions from being held by the first male thread engagement with the locating element to being secured by the second male thread engagement with the object. This dynamic progression allows for easy removal and replacement of the screw locking element if needed, while maintaining stability during the assembly process through the first engagement.
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
Reduces assembly time by enabling temporary holding and easy removal of the screw locking unit, preventing thread damage and ensuring secure locking without excessive tightening.
Implementation Method 1
an elastic element, which is externally fitted around the stem portion of the screw main body to be limited between the head portion and the first screw locking section
Data Source
AI summary
A screw locking unit structure includes a screw main body having a head portion, a stem portion extended from a lower side of the head portion, a first screw locking section located below the stem portion, and a second screw locking section located below the first screw locking section; and an elastic element being externally fitted around the stem portion. The first screw locking section and the second screw locking section are externally provided with a first and a second male thread, respectively. The first and the second male thread are structurally different from one another to not only enable the screw main body to be temporarily held to an assembling interface before the latter is screw locked in place later, but also provide a function of stopping screwing automatically to prevent the second locking section extended through the assembling interface from being excessively screwed into a heat source.