Vibration Damping Structure for Power Tool Handle

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Solution Overview

Problem

Power tools that apply impact forces or torques generate vibrations, leading to operator discomfort and potential damage to tool components due to loosening of connections.

Innovation Solution

Incorporation of vibration damping elements between the handle housing, motor housing, and connecting member to reduce vibration transmission and enhance connection strength, using elastic materials to dampen vibrations and prevent component damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If vibration damping elements are added between the handle housing and motor housing, then vibration transmission is reduced, but device complexity increases

Engineering Contradiction:

Improvevibration transmissionVSAvoiddevice complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent introduces vibration damping elements as intermediary components between the handle housing and motor housing. These elements act as mediators that absorb and dissipate vibration energy, reducing the transmission of harmful vibrations to the handle portion while maintaining the structural connection between components.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The vibration damping elements are made from composite materials that combine different material properties to effectively dampen vibrations. The use of composite materials allows for optimized vibration absorption characteristics while managing the added complexity through material-level solutions rather than complex mechanical structures.

Inventive Principle:

Principle #40Composite materials

2Strength

If vibration damping elements are added to reduce vibration, then connection strength is improved, but manufacturing complexity increases

Engineering Contradiction:

Improveconnection strengthVSAvoidease of manufacture

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

The patent merges the vibration damping function with the existing connection structure by integrating damping elements into the assembly process. The damping elements are incorporated between existing components (handle housing, motor housing, connecting member) rather than requiring separate attachment steps, thereby improving connection strength while minimizing manufacturing complexity.

Inventive Principle:

Principle #5Merging (Combining)

3Reliability

If vibration damping structure is implemented, then reliability is improved by preventing component loosening, but device complexity increases

Engineering Contradiction:

ImprovereliabilityVSAvoiddevice complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The vibration damping elements provide beforehand cushioning by being pre-installed between components to absorb and reduce vibration energy before it can cause cumulative damage or loosening of connections. This preventive approach enhances reliability by addressing the root cause of component failure before it occurs.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

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 vibration damping structure effectively reduces vibration transmission, increases connection strength, and minimizes damage to tool components, providing a better user experience and preventing loosening of connections.

Implementation Method 1

a vibration damping structure configured to reduce transmission of vibration from the motor housing to the handle housing

Methodology Applied

Scientific EffectVibration damping: Damping

Implementation Method 2

using elastic materials to dampen vibrations and prevent component damage

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS20250091189A1Vibration damping structure for power tool and power tool with vibration damping structure

Publication Date: 2025.03.20 MILWAUKEE ELECTRIC TOOL CORP

AI summary

A power tool includes a working portion with a motor housing enclosing a motor, a handle portion including a handle housing, a connecting member having a first end coupled to the handle housing and a second end coupled to the motor housing, and a vibration damping structure configured to reduce transmission of vibration from the motor housing to the handle housing.