Electric Motorcycle Layout for Low Center of Gravity Stability
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Solution Overview
Problem
Existing electric motorcycles face challenges in achieving stability and safety at speeds above 50 km/h due to increased vibration frequency and higher requirements for vehicle body strength and battery endurance.
Innovation Solution
The battery pack, controller, and charging device are arranged on the frame adjacent to the front wheel, with the controller positioned on the battery pack, creating a compact structure and lowering the center of gravity, enhancing structural strength and stability, allowing speeds up to 120 km/h.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the battery pack, controller and charging device are arranged in a conventional distributed layout, then the vehicle body strength and stability are maintained, but the structure is not compact, the center of gravity is high, and the wind resistance is large when running at high speeds
Solution Approach 1:
The patent merges the battery pack, controller and charging device into a single integrated assembly located adjacent to the front wheel. This combining of multiple components into one compact unit reduces overall structural complexity and improves space utilization while maintaining vehicle body strength through the unified mounting structure on the frame.
Solution Approach 2:
The patent repositions components along the height direction of the frame, arranging the battery pack, controller and charging device in sequence vertically. This dimensional reorganization creates a compact structure that lowers the center of gravity and reduces wind resistance, while the frame structure maintains the required strength and rigidity.
2Stability of the object's composition
If the battery pack, controller and charging device are arranged adjacent to the front wheel, then the structure becomes compact and the center of gravity lowers, but the arrangement must maintain structural strength and stability at high speeds
Solution Approach 1:
The patent concentrates the heavy components (battery pack, controller, charging device) in a specific location adjacent to the front wheel, creating a localized mass concentration that lowers the center of gravity. This local quality change improves overall vehicle stability and controllability at high speeds while the frame structure ensures safety and reliability.
Solution Approach 2:
By arranging the battery pack, controller and charging device in sequence along the height direction and positioning them adjacent to the front wheel, the patent creates a balanced mass distribution that achieves optimal center of gravity positioning. This equipotential arrangement ensures stable vehicle composition and reliable safety performance at speeds up to 120 km/h.
3Speed
If the electric motor is positioned on the rear fork, then the motor and rear fork move synchronously eliminating speed difference in toothed drive belt operation, but the configuration must maintain wheel alignment and stability at high speeds
Solution Approach 1:
The patent positions the electric motor on the rear fork, allowing both components to move up and down synchronously during suspension operation. This dynamic positioning ensures that the toothed drive belt maintains constant tension and engagement without speed differences, while the frame structure maintains proper wheel alignment and stability at high speeds.
Data Source
AI summary
An electric motorcycle includes a battery pack, a controller and a charging device arranged in sequence along the height direction of the frame. The battery pack and the charging device are positioned on the frame adjacent to the front wheel. The rear suspension comprises a rear fork and a shock absorber connected to the frame by a shaft, the rear fork is connected to the rear wheel, and the electric motor is arranged on the rear fork. The center of gravity of the electric motorcycle is lower. The electric motorcycle can run stably even at a speed of 120 km/h.