Fuel Cell Drive Mounting Structure for Distributed Frame Load
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Solution Overview
Problem
The existing mounting structure for fuel cell drive systems concentrates the total load of the fuel cell system and drive unit on the vehicle body frame, necessitating reinforcement and increased weight.
Innovation Solution
A mounting structure that includes a fuel cell drive system with a stack case and auxiliary device case arranged alongside each other, connected by a mount member to the vehicle body frame, distributing the load across multiple frames and eliminating the need for separate support members, thereby reducing the vehicle body frame's weight and size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the total load of the fuel cell system and drive unit is concentrated on the vehicle body frame supporting the drive unit, then the mounting structure is simplified, but the vehicle body frame requires reinforcement which increases its weight
Solution Approach 1:
The mounting structure is segmented into multiple independent mounting positions distributed across the vehicle body frame. Instead of concentrating the load on a single reinforced frame, the fuel cell system and drive unit are mounted at separate locations, distributing the mechanical load across multiple frame sections without requiring overall frame reinforcement.
2Strength
If the vehicle body frame is reinforced to support the concentrated load, then the load-bearing capacity is improved, but the weight of the vehicle body frame increases
Solution Approach 1:
The load-bearing function is segmented from the overall frame structure and distributed to specific mounting sections. Each mounting position is designed to handle its portion of the load independently, allowing the frame to maintain adequate strength without requiring comprehensive reinforcement of the entire frame structure.
Solution Approach 2:
The frame structure is designed with localized strengthening only at the specific mounting positions where the fuel cell system and drive unit are attached. The rest of the frame maintains its original, lighter construction, achieving necessary load-bearing capacity only where required rather than reinforcing the entire frame.
3Reliability
If separate support members are provided for the fuel cell stack and auxiliary device, then the support function is improved, but the device complexity and size increase
Solution Approach 1:
The mounting structure merges the support functions for the fuel cell system and drive unit into a unified arrangement. The fuel cell system and drive unit are positioned and mounted in close proximity, sharing common mounting infrastructure and spatial organization, which reduces the number of separate support members needed while maintaining reliable support for both components.
Solution Approach 2:
The mounting structure is designed with multi-functionality, where the same mounting framework and attachment mechanisms serve both the fuel cell system and the drive unit. This universal mounting approach eliminates the need for dedicated separate support members for each component, reducing overall complexity while ensuring both systems are reliably supported.
Data Source
AI summary
In a mounting structure for a fuel cell drive system, a mount member includes a first mount and a second mount. The first mount connects the first end of a stack case to the first frame. The second mount connects the second end of an auxiliary device case to the second frame. The fuel cell drive system includes a first connecting member and a second connecting member. The first connecting member connects the stack case and a motor to each other. The second connecting member connects the auxiliary device case and a speed reducer to each other.