Charging Unit Mounting Structure for Vehicle Vibration Rigidity
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Solution Overview
Problem
The stability (rigidity) of the charging unit with respect to the vehicle body is insufficient, leading to potential vibration and large displacement during vehicle travel or collision, as seen in existing vehicle configurations.
Innovation Solution
A stiffener connects the power conversion unit and engine unit, with one end fixed to a boss on the power conversion unit's casing, enhancing the rigidity by firmly connecting both units to the vehicle body, eliminating the need for additional fixing bosses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the power conversion unit and charging unit are sequentially stacked on a motor unit, then the device complexity is reduced, but the stability (rigidity) of the charging unit with respect to the vehicle body becomes insufficient
Solution Approach 1:
The stiffener is divided into a first stiffener connecting the power conversion unit to the motor unit, and a second stiffener connecting the charging unit to the motor unit. This segmentation allows independent optimization of each connection path, ensuring both units are firmly anchored to the vehicle body while maintaining a relatively simple overall structure.
Solution Approach 2:
The stiffeners are specifically positioned at critical locations: the first stiffener connects the power conversion unit casing to the motor unit, while the second stiffener connects the charging unit casing to the motor unit. This local reinforcement provides targeted rigidity enhancement exactly where needed, without adding unnecessary structural complexity throughout the entire assembly.
2Stability of the object's composition
If a stiffener is added to connect power conversion unit and engine unit, then the stability (rigidity) of the charging unit is improved, but the device complexity increases
Solution Approach 1:
The stiffener structure is merged with the existing sequential stacking arrangement of the power conversion unit and charging unit on the motor unit. The first stiffener integrates the power conversion unit connection, while the second stiffener integrates the charging unit connection, creating a unified reinforcement system that enhances stability without requiring separate independent support structures.
Solution Approach 2:
The motor unit serves as a universal mounting base for multiple components: it supports the power conversion unit via the first stiffener, supports the charging unit via the second stiffener, and provides the foundational connection to the vehicle body. This multi-functional use of the motor unit as a support structure reduces the need for additional separate mounting structures.
Data Source
AI summary
The vehicle includes, in the engine compartment, an engine unit fixed to the vehicle body, a motor unit fixed to the vehicle body together with the engine unit, a power conversion unit fixed on the motor unit, a charging unit fixed on the power conversion unit, and a stiffener connecting the power conversion unit and the engine unit to each other. The stiffener has at least one first end fixed to the power conversion unit and at least one second end fixed to the engine unit. The casing of the power conversion unit is provided with a boss for fixing the charging unit. The first end of the stiffener is fixed to the boss of the power conversion unit.