Motorcycle Cowling Joint Cover Structure for Hidden Fasteners
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Solution Overview
Problem
Existing straddle-type vehicle cowling structures expose joints between cowlings, necessitating strict gap control and visible fastening members, which compromises appearance quality.
Innovation Solution
A cowling structure for straddle-type vehicles featuring a front cowling and side cowlings with an outer cowling design that hides the joint between the cowlings, using a third outer cowling to cover the joint and employing screwing or clipping methods without exposing fastening members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the joint between cowlings is exposed to the outside, then the structure is simple and easy to manufacture, but the appearance quality deteriorates due to visible gaps and fastening members
Solution Approach 1:
The outer cowling is divided into multiple segments (first outer cowling, second outer cowling, and third outer cowling) that can be assembled separately and then joined together. This segmentation allows the joint between cowlings to be positioned inside the hollow space rather than exposed externally, resolving the contradiction between manufacturing simplicity and appearance quality.
Solution Approach 2:
The outer cowling is designed as a hollow space that contains and hides the joint between the first and second outer cowlings. The third outer cowling specifically covers the joint area from the outside, creating a nested structure where the joint is enclosed within the overall cowling assembly, thus improving appearance while maintaining ease of manufacture.
2Shape
If strict gap control is implemented between cowlings, then appearance quality improves, but manufacturing complexity and difficulty increase
Solution Approach 1:
By segmenting the outer cowling into multiple parts that are joined within the hollow space, the design allows for easier gap control during assembly. The joint is positioned internally where it can be managed more effectively, reducing manufacturing complexity while maintaining appearance quality.
Solution Approach 2:
The third outer cowling acts as an intermediary element that specifically covers the joint area between the first and second outer cowlings. This intermediary component facilitates easier gap control and joint management while maintaining the overall appearance quality, reducing the complexity of the overall manufacturing process.
3Ease of operation
If fastening members are exposed to the outside, then assembly is simple and visible for inspection, but appearance quality deteriorates
Solution Approach 1:
The hollow space structure of the outer cowling allows fastening members to be positioned and concealed within the internal cavity. The third outer cowling covers the joint area where fastening members would be located, effectively hiding them from external view while maintaining ease of assembly through the same access points used for joining the cowlings.
Solution Approach 2:
The segmented design of the outer cowling allows for assembly access from the inside of the hollow space, enabling fastening members to be installed and hidden within the structure. This segmentation approach maintains ease of assembly while ensuring fastening members are not exposed to the outside, thus preserving appearance quality.
Data Source
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AI summary
A cowling structure for a straddle-type vehicle (1). The cowling structure includes a front cowling (51) covering a vehicle front portion from a front side, and a pair of side cowlings (61) covering the vehicle front portion from lateral sides. The pair of side cowlings each includes an outer cowling (62) forming an outer surface of the side cowling, and an inner cowling (66) forming an inner surface of the side cowling. The outer cowling at least includes a first outer cowling (63) facing a first region of the inner cowling, a second outer cowling (64) facing a second region of the inner cowling, and a third outer cowling (65) covering, from an outer side in a vehicle width direction, a joint between the first outer cowling and the second outer cowling.