Saddle Vehicle Frame Cross Pipe Segmentation for Storage Volume
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Solution Overview
Problem
The existing frame structure of saddle riding type vehicles compromises storage box capacity due to the large size of cross pipes required for stiffness, resulting in reduced space and smaller storage volumes.
Innovation Solution
The frame structure incorporates a pair of cross pipes with curved and inclined portions that connect seat rails, allowing for smaller diameter pipes while maintaining stiffness, and an upper end support bracket with a U-shape to enhance stiffness and secure the rear cushion's compression range, thereby increasing storage box volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a single large diameter cross pipe is used to achieve sufficient stiffness, then the stiffness of the vehicle body frame is improved, but the storage box volume is reduced due to the large size of the cross pipe
Solution Approach 1:
The patent divides a single large diameter cross pipe into multiple smaller diameter cross pipes (typically three: left, center, and right cross pipes). This segmentation allows the frame to achieve sufficient stiffness through the combined effect of multiple pipes while reducing the space occupied by each individual pipe, thereby increasing storage box volume.
Solution Approach 2:
The patent combines multiple smaller cross pipes into a unified frame structure that works together to provide the required stiffness. The cross pipes are positioned at specific intervals and connected to seat rails and the swing arm, creating a distributed support system that achieves frame rigidity without requiring any single pipe to be large in diameter.
2Volume of stationary object
If the cross pipe diameter is reduced to increase storage box volume, then the storage box capacity is improved, but the stiffness of the vehicle body frame is reduced
Solution Approach 1:
By segmenting the cross pipe structure into multiple smaller pipes positioned at different locations (left, center, right), the patent maintains frame stiffness through distributed support while allowing each pipe to have a smaller diameter that fits within the available space for the storage box.
Solution Approach 2:
The patent optimizes the spatial arrangement of cross pipes in three-dimensional space, positioning them at specific longitudinal intervals and lateral positions. This dimensional optimization allows the frame to achieve stiffness through strategic placement rather than relying on large pipe diameters, thereby preserving storage box volume.
3Volume of stationary object
If the cross pipe is positioned to maximize storage box space, then the storage box volume is improved, but the compression range of the rear cushion is reduced
Solution Approach 1:
The patent uses multiple cross pipes positioned at different longitudinal locations to provide frame support. This segmentation allows the rear cushion to be positioned between the cross pipes with adequate vertical clearance for compression, while the cross pipes themselves are positioned laterally to maximize storage box space.
Solution Approach 2:
The patent resolves the spatial conflict by utilizing the lateral dimension for cross pipe placement (maximizing storage volume) while maintaining sufficient vertical clearance between the cross pipes and the rear cushion for proper compression range. This multi-dimensional spatial arrangement satisfies both requirements simultaneously.
Data Source
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AI summary
To provide a frame structure of a saddle riding type vehicle, capable of making capacity of a storage box large by reducing a cross pipe in size, while achieving stiffness of a vehicle body frame. A frame structure (30) of a saddle riding type vehicle (1) is provided. The frame structure (30) includes: a vehicle body frame (10) including a pair of left and right seat rails (16) disposed downwardly of a seat (72) for occupant seating; a storage box (74) disposed downwardly of the seat (72) and between the pair of seat rails (16); a swing arm (40), swingably supported on the vehicle body frame (10), for rotatably holding a rear wheel (25); and a cushion (26) having a lower end portion connected to the swing arm (40). The vehicle body frame (10) further includes: a pair of cross pipes (32) and (33) extending laterally in a rear portion of the pair of seat rails (16) to thereby connect the pair of seat rails (16) and spaced apart longitudinally from each other; and an upper end support bracket (87), connecting the pair of cross pipes (32 and 33), for supporting an upper end portion of the cushion (26).