Straddled Vehicle Footrest Bracket for Bite-Free Folding
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Solution Overview
Problem
Existing straddled vehicle footrests can bite into the bracket when violently flipped up, preventing the footrest from returning to the expanded position, and the complex shape required to adjust the receiving surface angle complicates manufacturing and increases weight.
Innovation Solution
A bracket with a simple structure, featuring a base portion and an extending portion with a receiving surface located at the outer edge, allows for easy adjustment of the receiving surface angle to prevent biting, while maintaining manufacturing flexibility and reducing footrest weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the receiving surface is provided on the surface of the base portion, then the footrest can be supported at the folded position, but it is not easy to set the receiving surface at a desired angle and the bracket shape becomes complicated
Solution Approach 1:
The receiving surface is positioned at the outer edge of the extending portion rather than on the base portion surface, utilizing the lateral dimension to achieve the desired angle while maintaining a simple bracket structure that is suitable for extrusion processing
Solution Approach 2:
The angle of the receiving surface is optimized to be 45 degrees or more relative to the extending portion, which prevents footrest biting while allowing the bracket to maintain a simple geometry compatible with low-cost manufacturing methods
2Manufacturing precision
If the receiving surface is provided on the surface of the base portion, then the footrest can be supported at the folded position, but a high-cost manufacturing method such as aluminum forging is required
Solution Approach 1:
By relocating the receiving surface to the outer edge of the extending portion and optimizing its angle to 45 degrees or more, the bracket achieves the desired functionality with a simple geometry that can be manufactured using low-cost extrusion processing instead of expensive aluminum forging
3Reliability
If the contact portion extends long from the footrest toward the receiving surface, then the footrest can contact the receiving surface, but the weight of the footrest increases
Solution Approach 1:
The receiving surface is extracted and positioned at the outer edge of the extending portion, which shortens the required length of the contact portion on the footrest while ensuring reliable contact, thereby reducing the footrest weight
Solution Approach 2:
By optimizing the receiving surface angle to 45 degrees or more and positioning it at the outer edge, the contact geometry is improved such that a shorter contact portion achieves the same contact reliability, reducing footrest weight
Data Source
AI summary
A straddled vehicle includes a vehicle body frame, a bracket, and a footrest. The bracket is attached to the vehicle body frame. The footrest is movably supported by the bracket to be in one of an expanded position and a folded position. In the expanded position, the footrest extends outward from the vehicle body frame in the left-right direction. In the folded position, the footrest is rotated upward from the expanded position. The bracket includes a base portion and an extending portion. The base portion is disposed along the vehicle body frame. The extending portion extends outward from the base portion in the left-right direction. The footrest includes a contact portion that contacts the bracket at the folded position. The extending portion includes a receiving surface that contacts the contact portion, and that is located at an outer edge in the left-right direction of the extending portion.