Door Hanging Apparatus Elastic Roller Mechanism
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Solution Overview
Problem
Existing door hanging apparatuses experience reduced driving efficiency and increased wear due to running resistance in the derailing prevention mechanism, which also leads to tilting issues when doors are opened and closed.
Innovation Solution
A door hanging apparatus with an elastic connection mechanism that adjusts the position of the second door roller relative to the upper rail, allowing for minimal contact or a predetermined gap to reduce running resistance, and includes a quadrangular link mechanism for efficient positioning during acceleration, deceleration, and foreign object collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the second door roller is constantly pressed against the upper rail to prevent derailing, then derailing prevention performance is improved, but running resistance increases and driving efficiency decreases
Solution Approach 1:
The patent applies the dynamics principle by making the pressing force of the second door roller against the upper rail variable rather than constant. The elastic connection mechanism allows the roller to maintain light contact or a predetermined gap during normal operation (reducing running resistance), while automatically increasing contact pressure when derailing forces are detected (maintaining reliability). This dynamic adjustment resolves the contradiction between continuous derailing prevention and minimal energy loss.
2Stability of the object's composition
If the second door roller is constantly pressed against the upper rail to prevent tilting, then door stability is improved, but wear of the door roller increases
Solution Approach 1:
The patent implements dynamics by enabling the second door roller to adjust its contact pressure with the upper rail dynamically. During stable door operation, the roller maintains minimal contact or a predetermined gap, significantly reducing wear. When tilting forces occur, the elastic connection mechanism automatically increases the pressing force to prevent tilting. This dynamic behavior extends door roller service life while maintaining door stability when needed.
3Productivity
If the elastic connection mechanism allows minimal contact or gap between the second door roller and upper rail, then running resistance is reduced and driving efficiency is improved, but derailing prevention capability may be compromised
Solution Approach 1:
The patent resolves this contradiction through dynamics by designing the elastic connection mechanism to provide variable contact pressure. The mechanism allows minimal contact or a predetermined gap during normal high-speed operation, maximizing driving efficiency. However, when derailing forces are applied, the elastic elements automatically compress and increase the pressing force, ensuring derailing prevention capability is maintained. The system dynamically adapts to operational conditions.
Solution Approach 2:
The patent applies beforehand cushioning by incorporating elastic elements in the connection mechanism that are pre-configured to provide cushioning force. These elastic elements are designed to compress under specific load conditions, automatically increasing the pressing force of the second door roller against the upper rail before severe derailing occurs. This preparatory cushioning mechanism ensures that derailing prevention capability is activated in advance when needed, while maintaining minimal resistance during normal operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively prevents derailing and tilting of doors while minimizing running resistance, allowing for easy installation and maintaining high derailing prevention performance.
Implementation Method 1
the elastic connection mechanism includes an elastic portion, and the elastic connection mechanism is provided so as to be capable of changing the relative position between the second door roller and the drive connection portion by elastic deformation
Data Source
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AI summary
A door hanging apparatus is provided that can reliably prevent the derailing of door rollers and the tilting of a door when the door is opened and closed, while having little running resistance caused by a derailing prevention mechanism. Upper and lower rails (13a, 13b) are provided with running surfaces (18a, 18b) opposing each other in the vertical direction. First door rollers (19, 20) run in contact with the lower rail 13b, and are rotatably supported to a first door roller supporting member 21 that suspends a door 11. Second door rollers (24, 25) are rotatably supported to swing members (22, 23) swingably connected to the first door roller supporting member 21, and are provided so as to be capable of coming into contact with the upper rail 13a. A drive connection portion 26 is provided for holding and connecting the door 11 to an open-close drive mechanism 12. An elastic connection mechanism 27 includes an elastic portion (30a, 30b) capable of changing the relative position between the second door rollers (24, 25) and the drive connection portion 26, and connects the swing members (22, 23) to the drive connection portion 26.