Sequential Bottom Door Mechanism Reduces Opening Force
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Solution Overview
Problem
The existing bottom door mechanisms of carriages require a large action force to open multiple sets of door bodies simultaneously, leading to reliability issues and potential mechanical failure due to high impact forces.
Innovation Solution
A telescoping cylinder-driven mechanism that allows successive rotation of multiple door bodies, reducing the required action force by enabling each door body to be opened sequentially, with each rotating shaft connected by rocker arms and discs that facilitate a linked opening process, thereby decreasing the necessary force and impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple sets of door bodies are opened simultaneously by a single air cylinder, then the opening operation is completed in one action, but the required action force becomes very large and the impact force increases
Solution Approach 1:
The patent segments the door opening operation into multiple sequential stages by dividing the door bodies into different groups (first group and second group). Each group is opened by a separate air cylinder at different times, transforming a single high-force simultaneous opening into multiple lower-force sequential openings. This segmentation reduces the peak force requirement while maintaining operational efficiency.
2Force
If a large-diameter air cylinder or multiple air cylinders are used to provide sufficient action force, then the required force is met, but the device complexity and space requirements increase
Solution Approach 1:
Instead of using one large-diameter air cylinder or multiple synchronized cylinders, the patent employs multiple smaller-diameter air cylinders that operate sequentially. Each cylinder is responsible for opening a specific group of door bodies, reducing the force requirement for each cylinder while achieving the overall opening function through coordinated sequential operation.
Solution Approach 2:
The patent implements periodic action by controlling the air cylinders to operate in sequence rather than simultaneously. The first air cylinder opens the first group of door bodies, then the second air cylinder opens the second group after a time delay. This periodic operation allows each cylinder to complete its action before the next one activates, reducing the required force for each individual cylinder.
3Force
If a large-diameter air cylinder is used to overcome resistance moments of multiple door bodies, then the opening force is sufficient, but the impact force during opening increases and reliability decreases
Solution Approach 1:
The patent applies periodic action by introducing time delays between the operation of different air cylinders. The first air cylinder operates to open the first group of door bodies, completes its action, and only then does the second air cylinder operate to open the second group. This sequential timing reduces impact forces by ensuring each cylinder operates independently without simultaneous load peaks, thereby improving the reliability of the bottom door mechanism.
Data Source
AI summary
A bottom door of a carriage includes a telescoping cylinder and at least two sets of door bodies, each set of the door body is provided with one set of driving mechanisms, each of the driving mechanisms includes a rotating shaft and a driving rod, and the rotating shaft is connected with the respective door body by the driving rod, to allow the door body to be driven to rotate when the rotating shaft rotates; each of the rotating shaft is driven to rotate by the telescoping cylinder, and at least two of the rotating shafts are configured to be driven to rotate successively by the telescoping cylinder.