EV Motor Mount Flap Dampers for Ultra-High-Frequency Vibration
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Solution Overview
Problem
Conventional motor mounts for electric vehicles struggle to effectively reduce vibrations in the ultra-high-frequency band (1000 Hz or higher), despite providing adequate damping in lower frequency bands.
Innovation Solution
A motor mount design incorporating a flap part made of high-strength materials like steel, aluminum, or plastic, with adjustable flaps that can tune damping performance by varying the number, thickness, length, and width to target specific high-frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional motor mounts are used, then low/medium/high-frequency vibration (1000 Hz or less) is reduced, but ultra-high-frequency vibration (1000 Hz or higher) cannot be effectively reduced
Solution Approach 1:
The motor mount is divided into multiple functional segments: the insulator body for low/medium-frequency damping, the rubber flap for high-frequency damping (1000 Hz or less), and the additional flap structure for ultra-high-frequency damping (1000 Hz or higher). Each segment targets specific frequency ranges, allowing the system to reduce vibrations across the entire spectrum without compromising performance in any band.
Solution Approach 2:
The motor mount employs composite material construction combining rubber material for the insulator and flap with additional flap structures. The rubber material provides baseline damping across frequency bands, while the flap structures extend damping capability into ultra-high-frequency ranges, creating a composite system that achieves broad-spectrum vibration reduction.
2Reliability
If flap structures are added to improve high-frequency damping, then damping performance in specific frequency sections is improved, but device complexity increases
Solution Approach 1:
The additional flap structures are integrated with the existing insulator and rubber flap components rather than being separate attachments. The flap structures are coupled to the insulator in a unified assembly, merging multiple damping functions into a single integrated component that reduces vibrations across multiple frequency bands simultaneously, thereby minimizing the increase in device complexity.
Solution Approach 2:
The insulator structure serves multiple functions: it provides the primary mounting function, incorporates the rubber flap for high-frequency damping, and supports the additional flap structures for ultra-high-frequency damping. This multi-functional design allows a single component to address multiple vibration problems, reducing the need for separate dedicated components for each frequency range.
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
Enhances damping performance in high-frequency bands by selectively adjusting the flaps' characteristics, achieving effective vibration reduction across multiple frequency ranges, including ultra-high frequencies.
Implementation Method 1
an insulator configured to be coupled between the inner pipe and the outer pipe and provided with a rubber flap configured to reduce vibration transmitted through the inner pipe
Implementation Method 2
a pair of flap dampers fixedly coupled to an inside of the insulator and configured to reduce vibration in a set target high-frequency band transmitted through the inner pipe
Data Source
AI summary
A motor mount for an electric vehicle includes: an inner pipe having a fastening hole provided on the inner side and configured to be fastened to a load input point of a vehicle body; an outer pipe configured to be arranged coaxially with the inner pipe on the outer side of the inner pipe; an insulator configured to be coupled between the inner pipe and the outer pipe and provided with a rubber flap configured to reduce vibration transmitted through the inner pipe; and a pair of flap dampers fixedly coupled to the inside of the insulator and configured to reduce vibration in a set target high-frequency band transmitted through the inner pipe.