Tapered Door Hinge Pin Punch for Self-Centering Removal
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Solution Overview
Problem
Existing door hinge pin removal tools lack a prying and punching option with a centering function, leading to misalignment, damage to hinge knuckles, and insufficient striking power.
Innovation Solution
A door hinge pin removal tool with a tapered pin punch structure that automatically centers itself in the hinge knuckle, providing stability and enhanced striking power through a larger base and tapered design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a rod structure of the same size and shape as the door hinge pin shaft is used, then the tool structure is simple, but the tool may be too large to fit into the door hinge knuckle and causes misalignment
Solution Approach 1:
The pin punch structure uses a tapered design where the punch end section has a smaller diameter than the base portion. This parameter change allows the punch end to fit into the door hinge knuckle while the larger base provides stability and strength, resolving the contradiction between simple structure and proper fitting.
2Device complexity
If a rod structure is used, then the tool structure is simple, but misalignment occurs causing damage to the knuckle and surrounding structures
Solution Approach 1:
The pin punch structure employs an asymmetric tapered shape instead of a uniform rod. The tapered geometry provides automatic centering guidance that prevents misalignment and directs the force accurately, eliminating damage to the knuckle and surrounding structures while maintaining structural simplicity.
3Device complexity
If a thin rod structure is used, then the tool structure is simple, but the rod is not strong enough and does not transfer forces well
Solution Approach 1:
The pin punch structure is segmented into two functional parts: a punch end section for fitting into the knuckle and a larger base portion for strength and stability. This segmentation allows each part to perform its specific function optimally - the punch end for precise engagement and the base for force transfer - while remaining a single integrated structure.
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
Ensures proper fitting and alignment, minimizing damage to hinge components while delivering effective dislodging of hinge pins with improved stability and force transfer.
Implementation Method 1
The punch portion is designed to taper in diameter from the base portion to the punch end section to provide greater stability and punching power and an automatic centering of the punch end section in a door hinge knuckle
Implementation Method 2
since it has a larger base combined with a tapered design, the pin punch structure has greater stability and strength and will transfer more force to the end for greater striking power
Data Source
AI summary
A door hinge pin removal tool generally comprises a handle, a tool head, and a pin punch structure. The pin punch structure includes a base portion and a punch portion. The punch portion includes a punch end section that has a maximum diameter less than an inner diameter of a door hinge knuckle. The base portion has a maximum diameter greater than an inner diameter of a door hinge knuckle. The punch portion is designed to taper in diameter from the base portion to the punch end section to provide greater stability and punching power and an automatic centering of the punch end section in a door hinge knuckle in a door hinge pin removal procedure.