Fence Post Mount with Universal Collet for Stability
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Solution Overview
Problem
Conventional fence post mounts are prone to loosening and instability, especially when subjected to loads such as those from gates, due to their design which allows for clearance at the top of the base.
Innovation Solution
A fence post mount device featuring a base with at least one cavity, a universal collet with collet legs attached through separation notches, and a cap nut system that secures the post by deforming its inner wall when a full thread nut is tightened.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional base design with clearance at top is used, then ease of installation is improved, but reliability deteriorates due to posts easily pulling out and loosening under load
Solution Approach 1:
The collet legs are designed with a draft angle parameter that enables them to deform and create interference fit with the post inner wall. When the cap nut is tightened, the collet legs change their dimensional parameters to match the post dimensions, creating a pressure fit that prevents loosening while maintaining ease of installation
Solution Approach 2:
The collet legs provide localized quality enhancement by concentrating the gripping force at specific points on the post inner wall. The separation notches create discrete gripping zones that locally deform the post material to create friction fit, improving reliability without requiring complete redesign of the entire base structure
2Manufacturing precision
If conventional mounts sized for particular post size are used, then manufacturing precision is improved, but adaptability deteriorates as they handle much less load
Solution Approach 1:
The collet mechanism provides universal adaptability by using the same base structure with adjustable collet legs that can accommodate multiple post sizes. The separation notches allow the collet legs to be positioned at different angles to match various post diameters, enabling one mount design to handle different loads and post dimensions while maintaining manufacturing precision
3Strength
If cap nut tightening system is used, then strength is improved by deforming post inner wall, but device complexity increases with additional components
Solution Approach 1:
The cap nut and collet legs form a nested structure where the collet legs are inserted into the base cavity and the cap nut threads onto the collet assembly. This nesting arrangement creates a compact, integrated structure that achieves high locking strength through the deformation mechanism while minimizing overall device complexity by combining multiple functions in a nested configuration
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 device provides a secure and stable mounting solution for fence posts of different sizes by ensuring a pressure fit and enhanced structural strength, reducing the likelihood of posts pulling out or loosening under load.
Implementation Method 1
each of the collet legs of the first universal collet deforms an inner wall of the post such that the post is securely locked within the cavity of the base
Data Source
AI summary
A fence post mount device comprising: a base having at least one cavity; a first universal collet having a plurality of collet legs attached to each other through at least one of a plurality of separation notches, wherein a distal end of the first universal collet is inserted into the cavity from a proximal end of the base; a first cap nut inserted into the first universal collet; a post inserted into the cavity of the base; a full thread nut threaded into the first cap nut from a distal end of the base through an opening, wherein each of the plurality of separation notches are broken when the full thread nut is tightened into the first cap nut and each of the collet legs of the first universal collet deforms an inner wall of the post such that the post is securely locked within the cavity of the base.