Vehicle Body Front Structure With Deformable Impact Absorber
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Solution Overview
Problem
Existing vehicle body structures do not effectively absorb impact energy of a motor mounted on the front side of a vehicle during a frontal collision.
Innovation Solution
A vehicle body front structure comprising a bulkhead portion, a front mount portion, a rear mount portion, and an impact absorbing portion that work together to absorb impact energy by allowing the motor to rotate and deform the impact absorbing portion, preventing it from entering the cabin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the motor is mounted on the front side of the vehicle, then the driving force can be applied to the drive wheel, but the impact energy during frontal collision cannot be absorbed effectively
Solution Approach 1:
The patent introduces an intermediary structure (the motor mount assembly with energy absorption components) between the motor and the vehicle body. This intermediary system absorbs impact energy through controlled deformation of the mount assembly, preventing direct transmission of impact forces to the motor and protecting the cabin from motor intrusion during frontal collisions.
Solution Approach 2:
The patent implements beforehand cushioning by designing the motor mount assembly with energy absorption capabilities that are prepared in advance. The mount assembly includes deformable elements and energy dissipation structures that are pre-configured to absorb impact energy before it can reach the motor or cabin, thereby preventing harmful effects during frontal collisions.
2Stability of the object's composition
If the motor is supported rigidly during normal operation, then the motor stability is maintained, but the impact energy cannot be absorbed during collision
Solution Approach 1:
The patent applies dynamics by designing the motor mount assembly to transition from a rigid support state during normal operation to a deformable energy-absorbing state during collision. The mount assembly includes elastic elements and deformable structures that maintain motor stability during normal conditions but allow controlled deformation to absorb impact energy during collisions, thereby resolving the contradiction between stability and energy absorption.
Solution Approach 2:
The patent utilizes parameter changes by designing the motor mount assembly with materials and structures that change their mechanical properties under different loading conditions. The mount assembly maintains high stiffness during normal operation for motor stability but transitions to lower stiffness and increased deformability during impact, enabling energy absorption. This is achieved through material selection and structural design that allow parameter changes in response to load magnitude.
3Loss of energy
If the motor can move freely to absorb impact, then the impact energy is absorbed, but the motor positioning precision deteriorates
Solution Approach 1:
The patent applies dynamics by designing the motor mount assembly to transition from a rigid support state during normal operation to a deformable energy-absorbing state during collision. The mount assembly includes elastic elements and deformable structures that maintain motor stability during normal conditions but allow controlled deformation to absorb impact energy during collisions, thereby resolving the contradiction between stability and energy absorption.
Solution Approach 2:
The patent utilizes parameter changes by designing the motor mount assembly with materials and structures that change their mechanical properties under different loading conditions. The mount assembly maintains high stiffness during normal operation for motor stability but transitions to lower stiffness and increased deformability during impact, enabling energy absorption. This is achieved through material selection and structural design that allow parameter changes in response to load magnitude.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively absorbs impact energy of the motor during a frontal collision, preventing it from entering the vehicle cabin and enhancing safety.
Implementation Method 1
an impact absorbing portion that is provided integrally with the bulkhead portion on a front side in the vehicle front-rear direction of the bulkhead portion and that is configured to be deformed when an impact load is applied from the front side of the vehicle
Data Source
AI summary
The vehicle includes a motor, a bulkhead portion constituting a part of a front part formed as a metal casting and partitioning the vehicle cabin and the power unit room on a vehicle rear side of the motor, a front mount portion which supports a vehicle front side portion of the motor with respect to the front part and is capable of releasing a support state of the motor when a load of a predetermined size or more is input from the vehicle front side, a rear mount portion which supports a vehicle rear side portion of the front mount portion and the vehicle upper side of the motor with respect to the front part, and an impact absorbing portion which is integrally provided with the bulkhead portion on the vehicle front side of the bulkhead portion and deforms when an impact load from the vehicle front side is input.