Straddled Vehicle Rear Fender with Dynamic Wire Adjustment
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Solution Overview
Problem
Existing straddled vehicles face challenges in reducing the size of the rear portion while maintaining effective mud spatter prevention and ensuring reliable maintenance access, as traditional rear fender designs either increase vehicle size or compromise mud spatter functionality due to changes in wheel position during maintenance.
Innovation Solution
A rear fender unit attached to the axle shaft, featuring a length adjusting portion for the electrical wire and a mud guard supported by a stay, allows for adjustable clearance and reduced size, ensuring effective mud spatter prevention and easy maintenance by maintaining the positional relationship between the rear wheel and fender.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the rear fender is extended to a position near the rear wheel to improve mud spatter prevention, then the mud spatter prevention function is improved, but the length of the rear fender increases and the rear portion of the vehicle increases in size
Solution Approach 1:
The rear fender is designed with a movable connection to the rear arm, allowing it to dynamically adjust its position. The fender can move relative to the rear arm to maintain optimal clearance with the rear wheel during maintenance operations, while still extending sufficiently to prevent mud spatter when the wheel is in its normal position.
Solution Approach 2:
The rear fender system is divided into separate components: the rear fender itself and the rear arm, connected through a movable joint. This segmentation allows the fender to be positioned independently to achieve both adequate length for mud spatter prevention and reduced overall vehicle size.
2Length of moving object
If the rear fender is attached to the rear frame to reduce rear vehicle size, then the size of the rear fender is reduced, but the clearance between the rear fender and rear wheel changes during maintenance, reducing mud spatter prevention function
Solution Approach 1:
The rear fender is connected to the rear arm through a movable joint rather than being fixed to the rear frame. This dynamic connection allows the fender to move with the rear arm during maintenance operations, maintaining consistent clearance with the rear wheel and ensuring continuous mud spatter prevention functionality.
3Device complexity
If the electrical wire is fixed length to connect the license plate lamp, then the wiring structure is simple, but the wire cannot accommodate changes in rear wheel position during maintenance
Solution Approach 1:
The electrical wire is replaced with a flexible cable assembly that can bend and extend. This flexible cable connects the license plate lamp to the vehicle's electrical system, allowing it to accommodate changes in the position of the rear wheel and rear fender during maintenance operations without restricting movement or requiring complex routing.
Data Source
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AI summary
A rear fender unit (21) is attached to an axle shaft (16). The rear fender unit includes an attachment portion (25) for a license plate (24), a license plate lamp (31), an electrical wire (43), and a length adjusting portion (44). The license plate lamp is attached to the attachment portion and is configured to illuminate the license plate. The electrical wire is connected to the license plate lamp. The length adjusting portion is configured to adjust the length of the electrical wire in response to the position of the rear wheel (17) relative to the rear arm (15).