Telescopic Pin Height Adjustment for European Groove Hinges
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Solution Overview
Problem
Conventional two-way door hinges for European grooves experience material wear over time, leading to sagging of the structures that allow rotation due to the pin's fixed position, which is not adjustable.
Innovation Solution
A telescopic pin with a first washer at half-length and an internally threaded second washer that screws or unscrews between the hinge flaps, providing a height adjustment mechanism to prevent material wear and sagging, utilizing a threaded bolt for secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed pin is used in conventional hinges, then the structure is simple, but material wear causes sagging over time
Solution Approach 1:
The hinge pin is made telescopic rather than fixed, allowing it to extend and retract. This dynamic adjustment mechanism compensates for material wear by enabling height correction, thereby maintaining door stability without requiring complete hinge replacement.
Solution Approach 2:
The pin's position is changed from fixed to adjustable through a telescopic mechanism with thread engagement. This parameter change allows the pin height to be modified, compensating for wear-induced sagging and maintaining proper door alignment.
2Duration of action of stationary object
If a telescopic pin with thread is used, then material wear is prevented, but the device complexity increases
Solution Approach 1:
The pin incorporates a telescopic mechanism with internal threading, transforming it from a static component to a dynamic one. This allows the pin to adjust its effective length by extending or retracting, thereby compensating for wear and extending the hinge's service life.
Solution Approach 2:
The telescopic pin features nested segments that can slide relative to each other, with one segment containing threading for adjustment. This nested structure allows compact storage when retracted while providing adjustment capability when extended, maximizing space efficiency.
3Adaptability or versatility
If the pin is made adjustable, then height correction is possible, but the manufacturing complexity increases
Solution Approach 1:
The pin is divided into multiple segments or sections, with the adjustment mechanism localized to specific portions. This segmentation allows the complex telescopic and threaded portions to be manufactured separately and then assembled, reducing overall manufacturing complexity.
Solution Approach 2:
The adjustment mechanism combines multiple functions into the pin structure itself - the telescopic action provides length adjustment while the threading enables secure positioning. This merging of functions into a single component reduces the number of separate parts needed.
Data Source
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AI summary
Two-way door hinge for European groove comprising two flaps (10) (1), fixed to the brackets (9) (4) through attachment means (3) (5) and a threaded bolt (2), and which are coupled each other through a threaded bushing (8) that fits at the flap (10) and receives the telescopic pin (7) fitted in the flap (1); the telescopic pin (7) has a washer (12) at the same distance to its upper and lower ends, and a thread (13) followed by a recess (14) which receives the attachment means (5) in order to fix the lower bracket (4); the hinge has a washer (6) with two diameters, outer diameter and inner diameter; the washer (6) fits in the lower end of the telescopic pin (7); the upper end of the telescopic pin (7) is received into the externally threaded bushing (8), and this one slides up to the washer (12) till fixing its lower end at said washer; and the hinge has a cover (11) which is adaptable to the upper flap (10) and fitted in its rotating part.