Screw Joint Structure With Guided Alignment Against Member Shifting
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Solution Overview
Problem
Conventional coupling structures for superimposed members using screw members often face challenges in preventing relative positional displacement and ensuring favorable workability during assembly.
Innovation Solution
A coupling structure featuring a convex portion on the first member with a through-hole and a concave portion on the second member, where the second through-hole is narrower than the convex portion, guides the screw member to the screw hole, preventing displacement and enhancing assembly efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional coupling structures are used to fasten two superimposed members with screw members, then the members can be coupled together, but relative positional displacement between the members cannot be effectively suppressed during assembly
Solution Approach 1:
The convex portion with first through-hole and concave portion with second through-hole are provided in advance on the first and second members respectively. These guiding structures are pre-formed features that automatically align the members when brought together, eliminating the need for external fixtures or complex positioning operations during assembly.
Solution Approach 2:
The convex portion and concave portion act as intermediary guiding structures between the two members. The first through-hole in the convex portion and the second through-hole in the concave portion work together as a mediating mechanism to guide the screw member and ensure precise alignment, facilitating easy assembly while maintaining positional stability.
2Manufacturing precision
If the second through-hole has a width smaller than the convex portion, then the screw member is accurately guided to the screw hole, but the structure becomes more complex
Solution Approach 1:
The coupling structure is segmented into distinct functional elements: the convex portion with the first through-hole on one member, and the concave portion with the second through-hole on the other member. This segmentation allows each element to perform its specific guiding function independently, achieving precise alignment through the coordinated action of simpler, separate components rather than a single complex structure.
Solution Approach 2:
The second through-hole is nested within the concave portion, which itself is nested on the second member. The convex portion fits into the concave portion during assembly, creating a nested arrangement where the first through-hole and second through-hole align. This nesting approach achieves precise guiding functionality while maintaining relatively simple individual component geometries.
Data Source
AI summary
Provided is a joint structure which is capable of easily preventing relative positional shifting between two members joined by a screw member, and which has favorable workability. The joint structure joins a first member that is provided with a screw hole in which female screw threading is formed and a second member that can be stacked on the first member, by insertion from the second member side of a screw member that has formed thereon male screw threading which screws into the female screw threading. The joint structure is provided with a protruding part that is provided to the first member and that has formed therein a first through hole that guides the screw member into the screw hole. The second member has a width that is smaller than the width of the protruding part, and has formed therein a second through hole which guides the screw member into the screw hole via the first through hole, and a recessed part which accommodates the protruding part.