Modular Electric Motorcycle Frame Structure for Compact Chassis Design
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Solution Overview
Problem
Conventional electric motorcycle chassis structures face challenges in efficiently mounting and wiring electric components due to complex wiring and limited space, making it difficult to create a lighter and smaller design while stably supporting the electric motor.
Innovation Solution
A modular frame structure for electric motorcycles, where half-frame bodies are formed into modules with integrated electric components and wiring, allowing for easier assembly and reduced mounting space requirements, and a support structure that stabilizes the electric motor with a bracket for the side kickstand at multiple points around the output shaft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If electric components are mounted in a chassis with left and right half-frame parts bonded together, then the chassis structure is stable, but it becomes difficult to mount wirings and cables
Solution Approach 1:
The chassis framework is divided into left and right half-frame parts that are bonded together. This segmentation allows the wirings and cables to be routed along the outer periphery of the bonded structure, making mounting easier while maintaining structural stability.
2Reliability
If thick high voltage cables are used to connect main components, then reliable power transmission is achieved, but the components become uneasy to mount
Solution Approach 1:
The wirings and high voltage cables are routed and positioned along the outer periphery of the bonded half-frame structure before final assembly. This preliminary arrangement makes it easier to handle and mount the thick cables while ensuring reliable power transmission between components.
3Volume of moving object
If the mounting space in the chassis is reduced to make the electric motorcycle lighter and smaller, then the overall size is reduced, but it becomes more difficult to mount the wirings
Solution Approach 1:
Instead of routing wirings through the internal mounting space, the invention utilizes the outer periphery dimension of the bonded half-frame structure. This dimensional shift allows wirings to be mounted externally, accommodating reduced internal space while maintaining wiring accessibility.
4Adaptability or versatility
If a bracket for side kickstand is attached to the chassis framework near the electric motor support position, then the side kickstand function is achieved, but the area available to support the electric motor is limited
Solution Approach 1:
The chassis framework structure is designed to serve multiple functions: it provides both the attachment position for the side kickstand bracket and sufficient support area for the electric motor. The bonded half-frame configuration allows both functions to coexist by utilizing different spatial zones.
5Reliability
If the electric motor is supported at three or more points around the output shaft, then stable support is achieved, but a wide lateral side area of the chassis framework is required
Solution Approach 1:
The electric motor support function is distributed across multiple attachment points on the bonded half-frame structure. The segmentation of the chassis into left and right parts allows support points to be positioned at three or more locations around the output shaft, achieving stability without requiring excessive lateral area.
Data Source
AI summary
There is provided a frame structure for an electric motorcycle. A plurality of electric components are mounted in a chassis framework comprised of a pair of half-frame bodies. One of the half-frame bodies is formed into a module to which electric components are connected via cables.