Door Hinge Fastening for Hollow Profiles Using Through Sleeve Centering
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Solution Overview
Problem
Existing door hinge fastening systems for hollow profiles are complex and difficult to adapt to different widths, often requiring intricate configurations and handling to ensure rigid support without compressing the profile when fastening screws are tightened.
Innovation Solution
A door hinge attachment featuring a through sleeve with a radially projecting collar on the second outer surface of the hollow profile for centering, allowing the fastening screw to pass through in a concentric arrangement, with connecting elements that have the same outer diameter as the through sleeve to ensure precise alignment and adaptation to various profile widths, and using multiple connecting elements to prevent end plate twisting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a door hinge fastening system is designed to provide rigid support without compressing the hollow profile, then the fastening reliability is improved, but the device complexity increases due to the need for intricate configurations and multiple adjustable components
Solution Approach 1:
The fastening system is divided into separate functional components: an end plate for mounting the hinge, connecting elements that bridge the hollow profile thickness, and a separate through-sleeve with collar for centering and positioning. This segmentation allows each component to be optimized independently, reducing overall system complexity while maintaining fastening reliability.
Solution Approach 2:
A through-sleeve with a radially projecting collar is introduced as an intermediary component between the connecting element and the hollow profile. The collar acts as a mediator that centers the fastening assembly and distributes loads, providing rigid support without requiring complex adjustment mechanisms or risking profile compression.
2Adaptability or versatility
If the door hinge fastening system is designed to adapt to hollow profiles of different widths, then the adaptability is improved, but the device complexity increases due to the need for adjustable connecting elements
Solution Approach 1:
The connecting element is designed with a universal function: it bridges the hollow profile thickness and provides a mounting surface for the hinge, while the separate through-sleeve with collar handles the centering and positioning functions. This multi-functional design allows the same basic components to adapt to different profile widths without requiring adjustable mechanisms, simplifying the overall system.
Solution Approach 2:
The through-sleeve with collar creates a standardized interface that copies the hollow profile's outer dimensions, allowing the fastening system to adapt to different profile widths through the profile's own geometry rather than requiring adjustable fastening components. The collar essentially copies the profile's external shape to provide proper centering.
3Strength
If connecting elements are designed to bridge the entire thickness of the hollow profile, then the fastening strength is improved, but the ease of manufacture decreases due to the need for precise length adjustment
Solution Approach 1:
The fastening system segments the load-bearing function (connecting element) from the positioning function (through-sleeve with collar). The connecting element can be manufactured as a standard length component that bridges the profile thickness, while the through-sleeve handles the precise positioning. This segmentation allows both components to be manufactured independently with standard tolerances, improving ease of manufacture while maintaining fastening strength.
4Ease of operation
If the door hinge fastening system uses a simple configuration, then the ease of operation is improved, but the ability to provide rigid support without profile compression deteriorates
Solution Approach 1:
The through-sleeve with radially projecting collar serves as a simple intermediary component that simultaneously provides centering, positioning, and load distribution functions. This single simple component achieves rigid support without profile compression, maintaining both ease of operation and reliability.
Solution Approach 2:
The through-sleeve with collar is designed as a multi-functional component that performs centering, positioning, and load distribution in a single element. This universal design provides rigid support capability while keeping the overall system simple and easy to install, as the same component handles multiple critical functions.
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The fastener (1) has an end plate (6) contacting an outer surface of a hollow profile. A connection element (7) is fastened to the end plate, and comprises a sleeve-shaped end section (8) for accommodating a fastening screw (9). A separate passage sleeve (10) is formed at a side of the fastener, and comprises a radially-projecting flange (11) at a side that is turned away from the end plate. The flange is supported at another outer surface of the hollow profile, where outer diameter of the passage sleeve corresponds to outer diameter of the connection element. An independent claim is also included for a door arrangement comprising a door fastener.