Offset Motor Wire Fixing for Collision Safety
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Solution Overview
Problem
In electrically driven vehicles, during frontal collisions, the driving unit and electric compressor can rotate towards the passenger compartment, potentially displacing high-pressure cables which may direct towards the compartment, posing a safety risk.
Innovation Solution
The vehicle design includes a motor offset to one side with specific fixing and electric wire positioning configurations to prevent cables from being directed towards the passenger compartment during collisions, enhancing safety through strategic positioning and support structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the motor is disposed offset to one side of the passenger compartment, then the motor can be effectively positioned for driving function, but the electric wire may be directed towards the passenger compartment during collision
Solution Approach 1:
The patent positions the electric wire fixing portion not only in the horizontal plane but also in the vertical dimension by placing it below the imaginary straight line connecting the fixing portions. This three-dimensional positioning ensures that even when the motor rotates during collision, the electric wire cannot reach the passenger compartment from below, adding a vertical safety dimension to the offset motor configuration.
Solution Approach 2:
The patent introduces an intermediary protective structure (the frame member or cover) that covers the electric wire fixing portion from above. This intermediary element prevents direct access to the electric wire from the passenger compartment side, acting as a physical barrier that mediates between the offset motor position and the passenger safety requirement.
2Ease of operation
If the motor is disposed offset to one side of the passenger compartment, then the motor can be effectively positioned for driving function, but the motor may rotate towards the passenger compartment during collision
Solution Approach 1:
The patent addresses motor rotation by positioning the electric wire fixing portion in the vertical dimension (below the imaginary straight line). This vertical positioning creates a safety margin that prevents the electric wire from reaching the passenger compartment even when the motor rotates horizontally during collision, effectively using the vertical dimension to mitigate horizontal rotation risks.
Solution Approach 2:
The patent performs preliminary protective action by positioning the electric wire fixing portion and covering it with the frame member or cover before any collision occurs. This pre-positioning ensures that when collision and motor rotation occur, the electric wire is already in a protected state that prevents it from reaching the passenger compartment.
3Reliability
If high-pressure cables are disposed between the driving unit and the dash panel, then electrical connectivity is maintained, but the cables may be dislocated and directed towards the passenger compartment during collision
Solution Approach 1:
The patent moves the electric wire fixing portion into the vertical dimension by positioning it below the imaginary straight line connecting the fixing portions. This vertical displacement ensures that the electric wire is positioned in a safe zone that cannot be reached by the passenger compartment during collision, while still maintaining electrical connectivity to the offset motor.
Solution Approach 2:
The patent introduces the frame member or cover as an intermediary protective element that covers the electric wire fixing portion. This intermediary structure maintains the electrical connectivity function while physically preventing the electric wire from being dislocated towards the passenger compartment during collision.
Data Source
AI summary
A vehicle includes a motor disposed so as to be offset to one side with respect to a center of the vehicle in a front-to-rear direction and a frame member for supporting the motor via at least two supporting devices. A first fixing portion which is situated relatively closer to the one side is formed in a higher position in a vertical direction than a second fixing portion which is situated closer to the other side. An electric wire fixing portion of the motor is formed in a position below an imaginary straight line which passes through a center of the first fixing portion and a center of the second fixing portion, in a side view of the motor.