Hinge Pin Recessed Toothing for Frame Assembly
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Solution Overview
Problem
Existing bands with hinged connections for sashes to frames face difficulties in assembly, especially with multi-part and adjustable hinges, due to protruding toothing on the hinge bolt, which complicates the use of bearing bushes and hinders precise horizontal adjustment.
Innovation Solution
The band features recessed toothing on the hinge bolt and complementary projecting toothing within the receptacle, allowing the bolt to pass through bearing bushes and enabling precise horizontal adjustment with displacement and fixing mechanisms, including a turning tool attachment and clamping screw for easy operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If protruding toothing is used on the hinge pin for engagement, then the hinge pin can be securely engaged with the receptacle, but the hinge pin cannot pass through bearing bushings and assembly becomes difficult
Solution Approach 1:
The patent inverts the conventional design by recessing the toothing into the hinge pin cross-section rather than protruding it outward. This allows the hinge pin to pass through bearing bushings during assembly while the recessed toothing still provides secure engagement with the receptacle's complementary projections.
Solution Approach 2:
The recessed toothing is nested within the cross-section of the hinge pin, allowing the pin to fit through bearing bushings while containing the engagement features inside its boundary, enabling both smooth passage and secure locking.
2Adaptability or versatility
If the hinge pin is made adjustable in multiple directions, then the hinge provides greater adaptability, but the assembly process becomes more difficult and time-consuming
Solution Approach 1:
The hinge pin is pre-configured with recessed toothing and displacement features that enable straightforward adjustment through simple rotational movement, reducing the time and complexity of assembly while maintaining multi-directional adjustability.
3Reliability
If protruding toothing is used on the hinge pin, then engagement is achieved, but the load-bearing capacity of the hinge section is reduced due to weakening depressions
Solution Approach 1:
By inverting the toothing design from protruding to recessed, the patent eliminates the need for weakening depressions in the hinge pin. The recessed toothing maintains engagement security while preserving the full load-bearing cross-section of the pin.
4Reliability
If the hinge pin has protruding engagement elements, then positive locking is achieved, but the pin cannot be mounted in sliding and rotatable manner within bearing bushings
Solution Approach 1:
The patent inverts the engagement element design by recessing the toothing into the pin rather than protruding it, enabling the pin to slide and rotate within bearing bushings during mounting while still achieving positive locking through engagement with the receptacle's projections.
Data Source
Figure 1
Figure 2~4
Figure 5~8
AI summary
The invention relates to a hinge (100) for connecting a leaf to a frame so as to be hinged about a hinge axis (S), comprising a leaf hinge part (6) which can be secured to the leaf, a frame hinge part (1) which can be secured to the frame, and a hinge pin (7) which defines the hinge axis (S) and has at least one circular region in the cross-section and first engagement means (15). At least one of the hinge parts has a hinge pin receiving area (8) which extends in the direction of the hinge axis (S). The hinge also comprises second engagement means (16) which are provided within the hinge pin receiving area (8) and which are in engagement with the first engagement means (15). The first engagement means (15) comprise at least one depression (14), which is set back with respect to the cross-section of the hinge pin (7), and the second engagement means (16) comprise at least one protrusion (13) which engages into the depression (14).