Longitudinal Sleeper Carriage Weight Distribution
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Solution Overview
Problem
Existing railroad passenger car sleeper compartments experience uneven weight distribution, leading to stability issues and passenger discomfort, with prior solutions either increasing the car's dynamic load through balance weights or providing inadequate reclining options.
Innovation Solution
A sleeper compartment design featuring longitudinally arranged sleepers in two layers with movable upper-sleepers, convertible sofas, and a private booth configuration, including a corridor with an arc roof and semi-transparent sliding doors, which allows for even weight distribution and enhanced passenger comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If balance weight is added to the compartment at the side of the corridor to make the weight evenly distributed, then the weight distribution is improved, but the deadweight of the railroad passenger car increases
Solution Approach 1:
Instead of adding weight to the corridor side to balance the transverse weight distribution, the patent inverts the approach by arranging sleepers longitudinally along the car body. This reconfiguration naturally distributes weight evenly across the car's length without requiring additional balance weights, thereby resolving the contradiction between weight distribution and deadweight increase
Solution Approach 2:
The patent transitions from transverse sleeper arrangement (perpendicular to car length) to longitudinal arrangement (parallel to car length). This dimensional change in sleeper orientation fundamentally alters the weight distribution pattern, achieving even weight distribution along the car's length without adding extra weight
2Stability of the object's composition
If longitudinally arranged sleepers are used without partition walls, then the weight distribution is improved, but passenger privacy and comfort deteriorate
Solution Approach 1:
The patent segments the longitudinal sleeper arrangement by introducing partition walls between adjacent sleepers. This segmentation creates individual compartments for each passenger while maintaining the longitudinal orientation of sleepers, thus preserving the weight distribution benefits while adding privacy and comfort
Solution Approach 2:
The patent applies different structural qualities to different regions: the overall sleeper arrangement maintains longitudinal orientation for weight distribution, while local partition walls are added between sleepers to provide privacy. This local differentiation resolves the contradiction between weight distribution and passenger comfort
3Device complexity
If the back cushion portion is adjustable in a small range with reclining posture, then the structure complexity is reduced, but passenger comfort deteriorates
Solution Approach 1:
The patent implements a convertible sofa design where the back cushion can be dynamically adjusted between multiple positions including upright, reclining, and flat configurations. This dynamic adjustability allows passengers to choose comfortable positions while maintaining reasonable structural complexity through mechanical linkage mechanisms
Data Source
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AI summary
The present invention relates to the technical field of railroad passenger car, and more particularly relates to a sleeper compartment of a railroad passenger car. The sleeper compartment may be an open type or a private booth type, comprising: sidewalls, partition walls, and two columns of longitudinally arranged sleepers that are parallel with each other; each column of the longitudinally arranged sleepers is formed by no less than two sleepers that are joined together, the sleepers comprise an upper-sleeper layer and a lower-sleeper layer; one partition wall is provided between adjacent sleepers; the length direction of the longitudinally arranged sleepers is consistent with the length direction of the railroad passenger car; the longitudinally arranged sleepers at two sides are fixed to the sidewalls respectively, and a corridor is provided between two adjacent columns of longitudinally arranged sleepers. The weight of the sleeper compartment of a railroad passenger car in this structure is evenly distributed, and passengers have better comfort when traveling.