Damping Element for Hand-Held Tool Vibration Decoupling
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Solution Overview
Problem
Existing hand-held power tools face challenges in effectively decoupling vibrations between the drive unit and the handle, particularly under high load conditions, which can lead to discomfort and reduced tool longevity due to direct material contact and complex structural designs.
Innovation Solution
Incorporating a damping element between the motor casing and the machine casing that serves both as a support and a vibration reducer, allowing for simplified design and effective oscillation decoupling by transmitting forces in multiple directions, and optionally using a carrier ring or receiving devices for secure assembly and force transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a separate casing part is used to receive the drive motor with vibration decoupling, then vibration decoupling is achieved, but device complexity increases
Solution Approach 1:
The patent merges the drive motor support function and vibration decoupling function into a single integrated damping element. This element is disposed directly between the motor casing and the machine casing, eliminating the need for a separate casing part while achieving both structural support and vibration reduction.
Solution Approach 2:
The damping element serves multiple functions simultaneously: it acts as a carrier element for holding and supporting the drive motor, provides vibration decoupling between the motor casing and machine casing, and transmits forces in multiple directions. This multi-functionality reduces overall device complexity while maintaining effective vibration control.
2Device complexity
If direct contact between motor casing and machine casing is allowed, then structural simplicity is achieved, but vibration transmission increases
Solution Approach 1:
The damping element acts as an intermediary component between the motor casing and the machine casing. It prevents direct contact while transmitting necessary forces, thereby decoupling vibrations in at least two differing directions without compromising structural integrity or requiring complex casing designs.
3Object-affected harmful factors
If damping elements transmit forces in multiple directions, then vibration decoupling is improved, but the requirement for exclusive support by damping elements increases design constraints
Solution Approach 1:
The damping element is designed with directionally optimized damping properties, providing enhanced vibration decoupling in specific critical directions while maintaining adequate support in other directions. This allows the element to transmit forces effectively in at least two differing directions without requiring overly complex assembly procedures.
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
This solution ensures effective vibration decoupling, reduces the need for separate casing parts, and allows for a single-piece handle design, enhancing user comfort and tool durability under high loads while simplifying the structural configuration of the hand-held power tool.
Implementation Method 1
a damping element is disposed in the machine casing, in the transmission path between the drive unit and a casing part
Implementation Method 2
The vibration decoupling device comprises flexurally elastic column elements
Data Source
AI summary
A hand-held machine tool comprises a driving motor that is mounted in a machine tool housing and is used to drive a tool, and a damping element accommodated in the machine tool housing. At least one damping element is arranged between the housing of the driving motor and the machine tool housing and forms a support element for mounting and supporting the driving motor in the machine tool housing.