Gear Hinge Rotational Guide for Rotary Door Stress Reduction
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Solution Overview
Problem
Existing door hinge systems face challenges in minimizing rotational moment between the upper and lower sides of a door, leading to increased compressive and tensile stresses, which result in friction noise, deformation, and inaccurate door operation, especially in larger doors with increased loads.
Innovation Solution
A rotational actuation guide device featuring first and second vertical supports with specific convex and concave contact surfaces that reduce the rotational moment applied to the gear hinge unit, minimizing tensile and compressive stresses and deformations by altering the contact line distance during door opening and closing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the size of the door is enlarged, then the door provides better functionality and aesthetics, but the rotational moment on the vertical plane increases, requiring larger and more rigid hinge parts and fixing means
Solution Approach 1:
The hinge system is divided into multiple gear hinge units distributed along the vertical plane of the door. Each unit independently handles a portion of the rotational moment, allowing the door to be enlarged without proportionally increasing the size of individual hinge components. The segmentation of the hinge system into multiple units effectively distributes the mechanical load.
Solution Approach 2:
The invention transitions from a single-point hinge connection to a distributed multi-point hinge system along the vertical dimension. By arranging gear hinge units at different vertical positions, the system utilizes the vertical dimension to distribute rotational moment, reducing the strength requirements for each individual hinge unit while supporting larger door sizes.
2Length of moving object
If the cross-sectional size of the door is minimized to meet consumer demand for slim doors, then aesthetics and space efficiency are improved, but the fixing means size must be increased to maintain sufficient rigidity
Solution Approach 1:
The hinge system is divided into multiple gear hinge units distributed along the vertical plane of the door. Each unit independently handles a portion of the rotational moment, allowing the door to be enlarged without proportionally increasing the size of individual hinge components. The segmentation of the hinge system into multiple units effectively distributes the mechanical load.
Solution Approach 2:
The invention transitions from a single-point hinge connection to a distributed multi-point hinge system along the vertical dimension. By arranging gear hinge units at different vertical positions, the system utilizes the vertical dimension to distribute rotational moment, reducing the strength requirements for each individual hinge unit while supporting larger door sizes.
3Device complexity
If general pin-type hinge rods are used, then the hinge structure is simple, but it is difficult to enlarge the door without increasing hinge part and fixing means size due to weak rigidity against rotational moment
Solution Approach 1:
The hinge system is divided into multiple gear hinge units distributed along the vertical plane of the door. Each unit independently handles a portion of the rotational moment, allowing the door to be enlarged without proportionally increasing the size of individual hinge components. The segmentation of the hinge system into multiple units effectively distributes the mechanical load.
Solution Approach 2:
The invention replaces the simple pin-type hinge rod mechanism with a gear-based hinge unit system. The gear mechanism provides inherent mechanical advantage and rigidity against rotational moment while maintaining relatively simple individual unit structures. This substitution enables larger door sizes without proportionally increasing hinge component dimensions.
Data Source
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AI summary
The present invention relates to a device capable of guiding a stable rotational actuation between a first support bracket fixedly connected to a supporting frame side of a door frame and a second support bracket fixedly connected to the door side in a gear hinge unit constituting a rotating door, specifically, in a door hinge in which a gear hinge unit is provided between the first support bracket fixedly connected to the support frame side of the door frame and the second support bracket fixedly connected to the door side, by minimizing the compressive stress generated in the lower gear hinge unit under a neutral axis of the door and the tensile stress generated in the upper gear hinge unit above the neutral axis of the door by the rotational moment applied to the gear hinge unit due to the load of the door, it is possible not only to secure and maintain the correct opening/closing performance of the door, but also to minimize damage to parts caused by friction or friction noise in the door hinge.