Wheel-Side Dual-Motor Layout for Motorcycle Handling and Battery Space
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Solution Overview
Problem
Existing electric motorcycle drive systems, such as hub and mid-drive motors, suffer from inefficiencies, increased weight, poor handling performance, reduced battery space, and poor waterproof sealing, which affect the overall performance and endurance of the vehicle.
Innovation Solution
A motorcycle wheel-side dual-motor drive system is introduced, dividing a conventional mid-drive or hub motor into two smaller motors, with one as the main drive and the other as an auxiliary, utilizing one-way transmission and gear mechanisms to optimize weight distribution, reduce motor space, and enhance waterproofing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If hub motors are used, then the structure is simple, but the weight increases and handling performance deteriorates
Solution Approach 1:
The patent divides a single hub motor into two separate wheel-side motors, with one motor mounted on each side of the rear wheel. This segmentation reduces the weight concentrated at the wheel hub while maintaining the simplicity of the hub motor structure. Each motor is independently mounted on the fork housing, distributing the weight more favorably for handling.
2Device complexity
If hub motors are used, then the structure is simple, but waterproof sealing performance deteriorates
Solution Approach 1:
The patent extracts the motor from the hub center location and mounts it on the fork housing instead. This relocation separates the motor from the wheel hub assembly, allowing for better waterproof sealing design. The motor is positioned in a more accessible location on the fork housing where sealing can be more effectively implemented, away from the complex interface between wheel, hub, and tire.
3Speed
If mid-drive motors are used, then the transmission path is extended, but battery space is reduced
Solution Approach 1:
The patent relocates the motors from the traditional mid-drive position (central location requiring long transmission shafts) to the wheel-side fork housing position. This spatial reconfiguration in a different dimension allows the motors to be positioned closer to the wheel while freeing up central battery space. The transmission path is optimized by mounting the drive components directly on the fork housing near the wheel axis.
4Weight of moving object
If wheel-side dual-motor configuration is used, then weight distribution improves, but device complexity increases
Solution Approach 1:
The patent combines the functions of two separate wheel-side motors into a coordinated dual-motor system that works together to drive the rear wheel. The left and right motors are both mounted on the fork housing and transmit power to the wheel through gear mechanisms. This merging of two motors provides improved weight distribution and balanced power delivery while sharing common mounting structures and control systems.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system improves handling performance, allows for larger batteries, increases endurance mileage, and maintains power-saving operation through independent motor control, while providing a coordinated and attractive appearance.
Implementation Method 1
transmission between the right drive motor and the output shaft being one-way transmission
Implementation Method 2
a left transmission mechanism is provided between the left drive motor and the drive wheel, the left transmission mechanism includes a left driving gear shaft and a left driven gear
Data Source
AI summary
Disclosed is a motorcycle wheel-side dual-motor drive system, including a rear fork fixing seat connected to a frame. Two sides of the rear fork fixing seat are provided with left and right power rear fork housings, left and right drive motors are provided in the corresponding left and right power rear fork housings, respectively, both the left and right drive motors are in transmission connection with an output shaft of a drive wheel, and transmission between the right drive motor and the output shaft is one-way transmission. By dividing a conventionally designed mid-drive motor or hub motor into two smaller wheel-side motors, the weight distribution of the entire vehicle is more reasonable and the handling performance is better; more space is available for larger batteries, increasing the endurance mileage; the waterproof performance of the motor is improved; and more power-saving performance and more coordinated appearance are provided.