Motorcycle Frame Battery Nesting for Rigidity
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Solution Overview
Problem
Motorcycles face challenges in achieving high rigidity while maintaining a lightweight design due to the need for openings in the body frame to accommodate batteries, which compromises structural integrity and increases weight when thickening is required.
Innovation Solution
The motorcycle design incorporates a battery assembly housed within cylindrically-shaped engine suspension shafts, eliminating the need for openings in the body frame and utilizing dead space efficiently, thereby maintaining rigidity without weight increase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an opening is formed in the hollow frame to accommodate the battery, then the battery can be attached and detached, but the rigidity of the body frame deteriorates
Solution Approach 1:
The battery is nested within the hollow interior space of the body frame, utilizing the existing cavity without requiring any openings. The battery fits inside the hollow frame like a doll within a doll, maintaining the frame's structural integrity while accommodating the power source.
Solution Approach 2:
The battery mounting function is extracted from the body frame structure itself and relocated to a separate, dedicated battery mounting structure. This allows the body frame to remain intact and rigid while the battery is securely mounted elsewhere in the vehicle assembly.
2Strength
If the hollow frame is thickened to secure rigidity after forming an opening, then the body frame rigidity is improved, but the weight of the motorcycle increases
Solution Approach 1:
The battery is nested within the existing hollow interior space of the body frame, eliminating the need to thicken the frame walls. By utilizing the already-present cavity, the original frame thickness and weight are preserved while still accommodating the battery.
Solution Approach 2:
The battery mounting function is extracted from the body frame structure, allowing the frame to maintain its original thin-walled design without requiring additional thickening for structural support. A separate lightweight mounting structure handles the battery securing function.
3Volume of moving object
If the battery is disposed in the hollow frame, then the dead space is effectively utilized, but an opening in the hollow frame is required which compromises structural integrity
Solution Approach 1:
The battery is nested within the hollow interior space of the body frame, utilizing the dead space effectively. The battery fits inside the existing cavity without requiring any openings or modifications to the frame structure, thereby maintaining full structural integrity.
Data Source
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AI summary
To provide a small, lightweight motorcycle with a high rigidity, a motorcycle includes a driving source, a body frame (10) to which the driving source is attached, a pipe (32) that is attached to the body frame (10) and has at least one open end, and a power source (40) for the driving source. The power source (40) is housed in the pipe (32).