Underbone Vehicle Leg Shield Protruding Storage for Mud Protection
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Solution Overview
Problem
Underbone vehicles face challenges in preventing the ingress of water and mud into the air cleaner, which can lead to engine contamination, and existing solutions complicate the frame structure or reduce driver accessibility.
Innovation Solution
A protruding portion is integrated into the leg shield, positioned to overlap with the head pipe and main frame, reducing water and mud adhesion without compromising driver access, and used to form a storage compartment that minimizes interference with foot movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the engine is disposed under the main frame, then the engine is protected from direct exposure, but the engine becomes liable to be splashed with water or mud thrown from the front wheel
Solution Approach 1:
The patent introduces an intermediary structure (shield or cover) positioned between the front wheel and the engine to block water and mud splashing. This mediator prevents the harmful substances from reaching the engine while allowing the engine to remain in its protected position under the main frame.
2Object-affected harmful factors
If a large front fender is used to decrease water and mud splashing, then the engine is protected, but the front fender overlaps with the front wheel and complicates the structure
Solution Approach 1:
The patent extracts the protective function from the front fender and implements it through a separate, dedicated shield or cover structure. This allows the front fender to maintain its primary function of covering the front wheel while the extracted protective element specifically addresses water and mud splashing toward the engine area.
3Volume of moving object
If the air cleaner is disposed between the main frame and the engine, then space is utilized efficiently, but the air cleaner becomes vulnerable to water and mud ingress
Solution Approach 1:
The patent positions the air cleaner between the main frame and engine while introducing protective shields or covers as intermediaries that block water and mud pathways. This allows the air cleaner to occupy the efficient space between components while the mediator structures prevent harmful substances from reaching it.
4Ease of operation
If the straddling portion is recessed more downward to ensure driver ease of getting on and off, then accessibility is improved, but the overall vehicle height increases
Solution Approach 1:
The patent creates a recessed straddling portion that extends downward, utilizing the vertical dimension to improve driver accessibility. By creating this localized downward extension only where needed for driver access, the overall vehicle height increase is minimized while still providing the necessary ease of mounting and dismounting.
Data Source
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AI summary
A protruding portion protrudes downward from a leg shield (52) toward a front fender (46). The protruding portion overlaps with at least a portion of a head pipe (11) or a portion of a main frame (12) in a side view of the vehicle. At least a portion of the protruding portion is disposed more laterally inward than an outer lateral edge of an air cleaner (57) in a vehicle width direction. A front end of the protruding portion is disposed more forward than a front end of the air cleaner (57). The protruding portion is a portion of a storage portion (66) having a space for storing an article. The storage portion (66) protrudes rearward from the leg shield (52). A lower end of the protruding portion is located upward than a lower end of the concave portion (54),