Hinge Assembly on Hollow Chamber Profiles Using Intermediate Piece
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Solution Overview
Problem
Hollow chamber profiles, commonly used in building construction, deform and twist under large loads due to inadequate load-bearing capacity when hinges are attached, particularly in window frames.
Innovation Solution
An intermediate piece is introduced between the hinge and the hollow chamber profile, secured with a retaining screw and fastening screws that engage internal threads, distributing forces and preventing deformation by creating a non-positive connection, while self-tapping screws enhance flexibility and stability, and a reinforcing element can be used to absorb mechanical loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a hinge is directly attached to a hollow chamber profile, then the assembly effort is low and the structure is simple, but the load-bearing capacity is insufficient and the profile deforms under high load
Solution Approach 1:
An intermediate piece is introduced between the hinge and the hollow chamber profile to serve as a mediator. This intermediate piece has a larger surface area that distributes the concentrated forces from the hinge over a broader area of the profile, preventing local deformation while maintaining structural integrity. The intermediate piece effectively transfers loads from the hinge mounting points to the broader profile structure.
Solution Approach 2:
The solution combines multiple materials with different properties: the hollow chamber profile (typically plastic or light metal), the intermediate piece (providing force distribution), and reinforcement elements (such as metal inserts or stiffening ribs). This composite approach leverages the advantages of each material to achieve both ease of assembly and high load-bearing capacity.
2Reliability
If fastening screws are used to attach the hinge, then the connection is secure, but the hollow chamber profile deforms under overtightening
Solution Approach 1:
The intermediate piece acts as a mediator between the fastening screws and the hollow chamber profile. It provides a robust interface that can withstand the clamping forces from the screws without transmitting excessive stress to the profile walls, thereby preventing deformation while maintaining secure connection.
Solution Approach 2:
The solution changes the mechanical parameters of the connection system by introducing an intermediate piece with optimized thickness and material properties. This allows the fastening screws to achieve reliable clamping force while the intermediate piece's structural parameters prevent stress concentration that would deform the profile.
3Ease of manufacture
If the hinge is attached directly to the profile, then the assembly is simple, but point loads cause deformation and twisting
Solution Approach 1:
The intermediate piece serves as a force-distributing intermediary that converts point loads from the hinge into distributed loads across the profile surface. This prevents local deformation and twisting while adding minimal complexity to the assembly process, as the intermediate piece can be pre-assembled or easily attached.
Solution Approach 2:
The intermediate piece extends the force distribution from a point contact (0D) to a surface contact (2D) by providing a larger mounting surface. This dimensional transition disperses the concentrated forces across multiple areas of the profile, preventing deformation while maintaining assembly simplicity.
Data Source
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AI summary
The invention relates to an assembly system of a hinge (1) on a hollow chamber profile (2), an intermediate piece (3) being arranged between the hinge (1) and the hollow chamber profile (2). The intermediate piece (3) is held with a holding screw (4) on the hollow chamber profile (2). The hinge (1) has pegs (6) which pass through assigned openings (7) of the intermediate piece (3) and engage in recesses (8) of the hollow chamber profile (2). The hinge (1) is fastened to the hollow chamber profile (2) by means of fastening screws (9), which pass through the assigned adapted internal threads (10) of the intermediate piece (3).