Elastic-Bracket Vibration Exciter for Low Resonance and Fatigue Control

Solution Overview

Problem

Existing vibration exciters face issues with structural fatigue due to low structural stiffness and damping in materials like nylon 12, leading to large amplitude vibrations and reduced equipment lifespan.

Innovation Solution

A vibration exciter design featuring elastic brackets with support seats, a support plate, and a voice coil, where the elastic brackets are made of a more rigid material to reduce resonance frequency and enhance amplitude, and are fixed to the cavity cover through adhesion and riveting, ensuring stable interconnection and reduced deformation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If a flexible frame made of nylon 12 material is used, then the resonance frequency is lower and amplitude is higher, but the structural stiffness and damping are low causing large amplitude vibrations that are difficult to attenuate

Engineering Contradiction:

Improveresonance frequencyVSAvoidvibration attenuation

Core Design Contradiction:

SpeedVSStability of the object's composition

Solution Approach 1:

The patent changes the material parameter from nylon 12 to aluminum alloy, fundamentally altering the mechanical properties including stiffness and damping characteristics. This parameter change allows the structure to maintain low resonance frequency while improving vibration attenuation capability through the higher inherent damping of the aluminum alloy material.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs a composite structure combining aluminum alloy brackets with rubber damping elements. The rubber material provides additional damping and vibration absorption, while the aluminum alloy provides structural stiffness. This composite approach resolves the contradiction by combining materials with complementary properties to achieve both low resonance frequency and effective vibration attenuation.

Inventive Principle:

Principle #40Composite materials

2Force

If a flexible frame made of nylon 12 material is used, then the amplitude is higher, but the structural stiffness is low leading to structural fatigue damage

Engineering Contradiction:

Improvevibration amplitudeVSAvoidstructural fatigue resistance

Core Design Contradiction:

ForceVSStrength

Solution Approach 1:

The patent changes the material parameter from nylon 12 to aluminum alloy, fundamentally altering the mechanical properties including stiffness and damping characteristics. This parameter change allows the structure to maintain low resonance frequency while improving vibration attenuation capability through the higher inherent damping of the aluminum alloy material.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs a composite structure combining aluminum alloy brackets with rubber damping elements. The rubber material provides additional damping and vibration absorption, while the aluminum alloy provides structural stiffness. This composite approach resolves the contradiction by combining materials with complementary properties to achieve both low resonance frequency and effective vibration attenuation.

Inventive Principle:

Principle #40Composite materials

3Stability of the object's composition

If rigid brackets are used to increase structural stiffness, then the resonance frequency increases, but the amplitude decreases

Engineering Contradiction:

Improvestructural stiffnessVSAvoidresonance frequency

Core Design Contradiction:

Stability of the object's compositionVSSpeed

Solution Approach 1:

The patent changes the material parameter from nylon 12 to aluminum alloy, fundamentally altering the mechanical properties including stiffness and damping characteristics. This parameter change allows the structure to maintain low resonance frequency while improving vibration attenuation capability through the higher inherent damping of the aluminum alloy material.

Inventive Principle:

Principle #35Parameter changes

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 design stabilizes the connection between components, reduces resonance frequency, and enhances amplitude, thereby improving the exciter's stability and extending its service life.

Implementation Method 1

the vibration is transferred to the support plate and then transferred to the elastic brackets through the support plate, so as to drive the cavity cover to vibrate

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Implementation Method 2

a voice coil is arranged around the main/secondary magnet

Methodology Applied

Scientific EffectElectromagnetic force: Lorentz Force

Data Source

PatentUS12598416B2Vibration exciter with elastic brackets

Publication Date: 2026.04.07 NINGBO KEPO ELECTRONICS

AI summary

A vibration exciter having an elastic support, comprising a cavity cover (1) and a vibration base (5). One side of the cavity cover (1) is provided with a PCB assembly plate (8), and a PCB is provided in the PCB assembly plate (8). An excitation signal is input into a voice coil (7) provided on the periphery of a main and auxiliary magnet (6) by means of the PCB, so that the vibration base (5) provided on the periphery of the voice coil (7) is driven, and the vibration base (5) is connected to a supporting plate (4) so that vibration is delivered to the supporting plate (4) and then is delivered to the elastic support (3) by means of the supporting plate (4), the cavity cover (1) is driven to vibrate, and a screen connected to the bottom of the cavity cover (1) is driven to vibrate. Such a structure effectively reduces a resonant frequency of the exciter, and improves the amplitude of the exciter; moreover, different structures are stably connected, and the service life of a device is prolonged.