EV Drive Casing Layout for High-Voltage Vibration Isolation
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Solution Overview
Problem
In vehicle driving devices, vibration is directly transmitted to high voltage components through the cover, leading to potential damage and inefficiency, as existing technologies do not effectively mitigate this vibration.
Innovation Solution
The driving device configuration includes a casing that accommodates an electric motor and gear, with the high voltage component fixed to the casing's side wall and the cover connected to a constituent member via a bracket, allowing for reduced vibration transmission by damping the vibrations through the casing's side wall before they reach the high voltage component.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the inverter body is fixed to the cover, then the structure is simple and easy to manufacture, but vibration applied to the cover is directly transmitted to the inverter body causing potential damage
Solution Approach 1:
The patent introduces the casing as an intermediary component between the cover and the inverter body. The inverter body is fixed to the casing rather than directly to the cover, creating a decoupling effect that interrupts the direct vibration transmission path while maintaining structural integrity and ease of assembly.
2Device complexity
If the inverter body is fixed to the cover, then the device complexity is reduced, but vibration transmission to the high voltage component increases
Solution Approach 1:
The casing serves as a mediator that reduces vibration transmission to the inverter body. By fixing the inverter body to the casing rather than the cover, the system maintains simple device complexity while the casing absorbs and dampens vibrations before they reach the high voltage component.
3Device complexity
If vibration is directly transmitted to the high voltage component, then the structure requires fewer components, but the durability of the high voltage component decreases
Solution Approach 1:
The casing acts as a protective intermediary between the cover and the inverter body. This additional component dampens vibrations and protects the high voltage component from direct vibration exposure, thereby extending its durability and service life while maintaining reasonable device complexity.
Data Source
AI summary
A driving device includes an electric motor configured to drive a wheel of a vehicle, a gear connected to the electric motor, a casing accommodating at least one of the electric motor and the gear, a high voltage component fixed to a side wall of the casing from outside of the casing and electrically connected to the electric motor, and a cover fixed to the side wall of the casing from outside of the casing and covering the high voltage component. The cover is connected to a constituent member located outside the cover.