Straddle Vehicle Cover Joint Structure for Multidirectional Strength
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Solution Overview
Problem
Existing joint structures for vehicle body covers in straddled vehicles provide high joint strength in one direction but low strength in others, and using fasteners like rivets or bolts results in reduced flexibility.
Innovation Solution
A joint structure with alternating and overlapping plate portions and protrusions/holes that engage in multiple directions, providing flexibility and high joint strength without strong fasteners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If hooks are locked in locking holes to join covers, then joint strength in one direction is high, but joint strength in other directions is low
Solution Approach 1:
The joint structure is segmented into multiple functional elements: first inner plate portions, second inner plate portions, first outer plate portions, second outer plate portions, first protrusions, and second protrusions with corresponding holes. These segmented elements work together to provide multi-directional joint strength, resolving the contradiction by distributing joining functions across multiple components rather than relying on a single hook-locking mechanism
Solution Approach 2:
The invention transitions from a single-plane hook-locking mechanism to a multi-dimensional plate portion structure with overlapping arrangements in the thickness direction. The first outer plate portions overlap the second inner plate portions, and second outer plate portions overlap the first inner plate portions, creating a three-dimensional joint structure that provides strength in multiple directions simultaneously
2Strength
If fastening members such as rivets or bolts are used to firmly fasten covers, then joint strength is increased, but rigidity of the fastening portion becomes too high, making it difficult to follow deformation
Solution Approach 1:
The invention uses thin plate portions (first inner plate portions, second inner plate portions, first outer plate portions, second outer plate portions) instead of rigid fastening members. These flexible plate portions can deform with the vehicle body cover while maintaining joint strength, resolving the contradiction between strength and flexibility by using thin, adaptable structures rather than rigid fasteners
Solution Approach 2:
The joint structure is designed to be dynamic rather than static. The plate portions and protrusions can move and adjust relative to each other during deformation, allowing the joint to adapt to changing conditions while maintaining strength. This dynamic design enables the fastening portion to follow deformation of the vehicle body cover
Data Source
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AI summary
There is disclosed a straddle vehicle (1), wherein first inner plate portions (32A, 32B, 32C) and first outer plate portions (31A, 31B, 31C) are provided in a first cover (21); second inner plate portions (42A, 42B, 42C) and second outer plate portions (41A, 41B, 41C) are provided on a second cover (22); The first outer plate portions (31A, 31B, 31C) respectively overlapping with the second inner plate portions (42A, 42B, 42C) from the outside in the thickness direction; the second outer plate portions (41A, 41B, 41C) respectively overlapping the first inner plate portions (32A, 32b, 32C) from the outside in the thickness direction; first protrusions (37A, 37B, 37C) being provided on one (31A, 31B, 31C) of the first outer plate portions (31A, 31B, 31C) and the second inner plate portions (42A, 42B, 42C), respectively; First holes (48A, 48B, 48C) being respectively provided in the other (42A, 42B, 42C) of the first outer plate portions (31A, 31B, 31C) and the second inner plate portions (42A, 42B, 42C); Second protrusions (48A, 48B, 48C) are respectively provided on one (41A, 41B, 41C) of the first inner plate portions (32A, 32B, 32C) and the second outer plate portions (41A, 41B, 42C);. second holes (38A 38B, 38C) being respectively provided in the other (32A, 32B, 32C) of the first inner plate portions (32A, 32B, 32C) and the second outer plate portions (41A, 41B, 41C).