Side Handle Vibration Decoupling via Segmented Leaf Spring
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Solution Overview
Problem
Existing side handles for hand-held power tools are costly and bulky due to complex constructions that fail to effectively reduce vibrations, impacting user comfort and handling efficiency.
Innovation Solution
A decoupling device with two parallel swinging elements, formed by a bent leaf spring, that securely attaches to the power tool, providing stable guidance while significantly reducing vibrations transmitted to the handle holder, thus allowing for a compact and cost-effective design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a complex support unit construction is used for translational displacement of the handle holder, then the guidance stability is improved, but the device complexity and manufacturing cost increase significantly
Solution Approach 1:
The support unit is divided into multiple guiding elements (first and second guiding elements) that are spaced apart from each other. These elements work together to provide stable guidance in directions parallel to the receiving axis while allowing movement in the direction of the main vibration axis, achieving guidance stability without complex construction.
Solution Approach 2:
The guiding elements are arranged in a specific spatial configuration (spaced apart and extending perpendicular to the receiving axis) to create directional guidance properties. This spatial arrangement allows the handle holder to move freely in the vibration direction while maintaining stability in perpendicular directions, resolving the contradiction between stability and simplicity.
2Reliability
If a bulky construction is used to ensure stable guidance, then the guidance reliability is improved, but the volume and compactness deteriorate
Solution Approach 1:
The guidance function is segmented into multiple simple guiding elements rather than one complex structure. These spaced-apart elements provide reliable guidance through their collective geometric arrangement, achieving reliability with minimal volume.
Solution Approach 2:
The guiding elements have a slender, elongate geometry with minimal cross-sectional area. Despite their thin profile, they provide effective guidance when spaced appropriately, enabling reliable handle holder positioning without increasing device volume.
3Object-affected harmful factors
If the decoupling device allows free movement of the handle holder, then vibration reduction is improved, but the alignment stability deteriorates
Solution Approach 1:
The decoupling function is achieved through multiple spaced guiding elements rather than a single flexible connection. This segmented approach allows vibration decoupling in the direction parallel to the receiving axis while maintaining alignment stability through the geometric constraints provided by the spaced elements.
Solution Approach 2:
The guiding elements act as intermediaries between the handle holder and the power tool body. They mediate the interaction by allowing controlled movement for vibration isolation while maintaining precise alignment through their specific geometric arrangement and spacing.
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 ensures comfortable handling and reduced manufacturing costs by effectively decoupling vibrations in the main axis direction, maintaining alignment and stability during tool operation, while being compact and non-intrusive.
Implementation Method 1
a decoupling device for connecting the handle holder with the attachment device with a partial vibration decoupling of the handle holder from the attachment device
Implementation Method 2
The swinging elements of the decoupling device, which are deflected parallel to each other
Data Source
AI summary
A side handle (2) for a hand-held power tool, such as, e.g., hammer drill or chisel hammer, includes a handle holder (10), an attachment device (6) for securing the side handle (2) on the power tool (4), and a decoupling device (8) for connecting the handle holder (10) with the attachment device (6) and for guiding the handle holder (10) relative to the attachment device (6), with the decoupling device (8) having two, spaced from each other, swinging elements deflectable parallel to each other.