Concealed Door Hinge Insert Form-Fit Adjustment
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Solution Overview
Problem
Conventional concealed door hinges experience play and wear due to uneven force distribution over time, leading to increased wear and instability.
Innovation Solution
The door hinge design features inserts held in a form-fitting manner with guide formations and a U-shaped receiving space, along with a receiving pocket for the adjusting screw, to minimize play and ensure precise alignment, using metal castings for enhanced stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a simple cap screw is used as the adjusting screw with an open receiving pocket for easy assembly, then ease of assembly is improved, but play and mobility within the receiving pocket cannot be avoided, leading to uneven force distribution and increased wear over time
Solution Approach 1:
A door belt is introduced as an intermediary component between the adjusting screw and the receiving pocket. The door belt features a T-shaped cross-section with a T-head that fits into a T-shaped recess in the receiving pocket, creating a form-fitting connection that eliminates play while maintaining adjustability. This intermediary element resolves the contradiction by providing both secure mechanical engagement and ease of assembly through the adjusting screw mechanism.
2Adaptability or versatility
If the inserts are allowed to move freely in the receiving pocket for adjustment purposes, then adaptability is improved, but play increases leading to tilting and uneven loading
Solution Approach 1:
The receiving pocket is designed with differentiated local qualities: a T-shaped recess provides form-fitting guidance in horizontal directions to prevent tilting and excessive movement, while still allowing vertical adjustment motion. This localized geometric constraint ensures inserts remain stable against tilting forces while maintaining the necessary adjustability for door alignment.
3Device complexity
If conventional adjusting mechanisms are used without form-fitting constraints, then device complexity is reduced, but play cannot be avoided leading to increased wear over time
Solution Approach 1:
The door belt employs asymmetric T-shaped geometry in its cross-section, with the T-head and T-shaped recess creating a directional form-fitting connection. This asymmetric design provides effective anti-tilt constraints in specific directions while allowing necessary adjustment movements, achieving wear resistance without requiring complex multi-directional constraint mechanisms.
Data Source
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AI summary
1. Door hinge for a concealed arrangement between door leaf and door frame, comprising a first receiving body (1) and a second receiving body (2) which can be inserted into recesses in the door frame and a narrow side of the door leaf, and comprising a hinge bracket arrangement connecting the receiving bodies (1, 2), which has at least two hinge brackets (4a, 4b) pivotably connected to each other about a vertical axis (5), wherein the hinge bracket arrangement is rotatably held on the second receiving body (2) by two spaced-apart, separate inserts (7') and wherein the inserts (7') are each adjustable in a second horizontal direction (y) perpendicular to a front surface of the second receiving body (2) relative to the second receiving body (2) by means of an adjusting screw (15).According to the invention, the inserts (7') are each held in a form-fitting manner in the vertical direction (z) between two mutually spaced counter surfaces and guided along the second horizontal direction (y).