Oscillation Damping Device for Hand-Power Tool Vibration Reduction
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Solution Overview
Problem
Portable power tools experience significant vibrations during operation, leading to user discomfort and increased wear, which existing vibration absorbing devices fail to adequately address due to inefficiencies in force transmission and maintenance complexity.
Innovation Solution
A vibration absorbing device comprising holding parts that enclose an absorption mass and an absorption spring, where the holding parts are identical and connected directly to the mechanism housing, allowing for efficient force counteraction and reduced friction, with a spring receptacle providing a form-fitting connection to the absorption mass for enhanced stability and ease of maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a vibration absorbing device is added to counteract vibrations, then vibration reduction is improved, but device complexity increases
Solution Approach 1:
The vibration absorbing device is integrated into the handle of the power tool, merging the vibration counteraction function with the existing handle structure. This reduces overall device complexity by eliminating separate vibration absorption components while maintaining effective vibration reduction through the combined structure.
2Object-affected harmful factors
If multiple components are used in the vibration absorbing device, then vibration absorption effectiveness is improved, but ease of manufacture deteriorates
Solution Approach 1:
The vibration absorbing device is divided into distinct functional components (absorption spring, absorption mass, holding parts) that can be manufactured separately using standard processes and then assembled. This segmentation allows each component to be optimized for its specific manufacturing requirements while simplifying the overall production process compared to creating a single complex integrated component.
3Object-affected harmful factors
If the absorption mass is freely moving, then vibration absorption is improved, but reliability deteriorates due to increased wear
Solution Approach 1:
The absorption spring is pre-loaded to create a cushioning force that prevents direct contact and impact between the absorption mass and the holding parts during normal operation. This beforehand cushioning reduces friction and wear by maintaining a small clearance, thereby improving reliability while preserving the vibration absorption function.
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 solution enables a robust, compact, and cost-effective portable power tool with low-vibration operation, reduced assembly effort, and minimized wear, while maintaining reliable performance and ease of maintenance.
Implementation Method 1
at least an absorption spring, an absorption mass
Implementation Method 2
the absorption spring is formed to be elastically deformable in the spring direction by at least 25% of a length in the unloaded state
Implementation Method 3
an absorption mass which is provided to reduce the vibration in particular of the portable power tool housing by inertia by means of an acceleration force and/or a deceleration force
Implementation Method 4
the vibration absorbing device works passively, that is to say without supplying energy apart from the vibration energy
Data Source
AI summary
A hand-power tool includes at least one oscillation-damping device that has at least one damping spring, a damping mass, and a mechanism housing. The oscillation-damping device has at least two retaining parts that at least partly enclose the damping mass.