Welded Hollow Motor Bracket for High-Frequency Vibration Damping
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Solution Overview
Problem
Existing supports for electric motors in vehicles fail to effectively dampen or absorb vibrations generated by electric motors, which have different vibration ranges compared to combustion engines, leading to inadequate damping characteristics.
Innovation Solution
A bracket for supporting electric motors on a vehicle chassis is designed with a hollow body made from plastic material, comprising two half shells that are welded together to form a cavity, providing flexibility and resilience to dampen vibrations in the range of 750 Hz to 2000 Hz, and optionally includes a damper with an oscillating mass and resilient member to further absorb vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a plastic bracket with hollow body is used, then vibration damping in the range of 750 Hz to 2000 Hz is improved, but the structural strength may be reduced
Solution Approach 1:
The bracket is divided into two half shells that are fixed to each other, forming a hollow body. This segmentation creates internal cavities that enhance vibration damping while maintaining structural integrity through the distributed wall structure.
Solution Approach 2:
The bracket utilizes plastic material with potential fiber reinforcement to achieve a composite structure that provides both the necessary strength to support the electric motor and the flexibility required for vibration damping in the specified frequency range.
2Weight of moving object
If a hollow body structure is used, then the bracket weight is reduced, but the manufacturing complexity increases
Solution Approach 1:
The hollow body is created by manufacturing two separate half shells and fixing them together. This segmentation allows for simpler individual mold designs compared to a single complex hollow structure, while still achieving the weight reduction benefits of the hollow configuration.
Solution Approach 2:
The manufacturing process utilizes molding parameters and material properties to enable the creation of thin-walled hollow structures that are lightweight yet sufficiently strong, balancing weight reduction with manufacturing feasibility.
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
The bracket effectively dampens and absorbs vibrations in the specified frequency range, reducing structure-borne noise while being lightweight and easy to manufacture, without the need for additional fastening means, and can be adapted for both electric and hybrid vehicles.
Implementation Method 1
a resilient member arranged between the oscillating mass and the bracket
Implementation Method 2
The bracket itself by virtue of its chosen material in conjunction with its shape provides damping/absorption characteristics in a frequency range between 750 Hz and 2000 Hz
Data Source
AI summary
The invention relates to a bracket for supporting an electric motor on a chassis of a vehicle. The bracket includes a first half shell defining a first half space and a second half shell defining a second half space. In embodiments, the first half shell and the second half shell are made from a plastic material, which may in particular comprise a polymer material. In embodiments, the first half shell and the second half shell are fixed to each other, such as by welding, such that the first half shell and the second half shell define a cavity within the bracket that includes the first half space and the second half space.