Hand-Held Power Tool Handle Vibration Damping via Intermediary
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Solution Overview
Problem
Hand-held power tools experience significant vibrations during operation, which are transmitted to the handle and cause operator discomfort and stress, as existing designs fail to effectively decouple the handle from the motor unit.
Innovation Solution
The hand-held power tool is designed with a dual-housing structure, where the handle is decoupled from the motor housing using vibration reduction elements, such as damping materials or spring elements, placed between the fastening component and the handle, and optionally between the motor housing and the fastening component, to reduce vibration transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the handle is directly connected to the motor housing, then the structural complexity is reduced and manufacturing is simplified, but vibrations from the motor are transmitted to the handle causing operator discomfort
Solution Approach 1:
A vibration reduction element is introduced as an intermediary component between the motor housing and the handle. This element acts as a mediator that allows the handle to be connected to the motor housing while simultaneously reducing vibration transmission. The vibration reduction element absorbs or dampens vibrations generated by the motor, preventing them from being transmitted to the handle and thus resolving the contradiction between structural simplicity and vibration reduction.
2Ease of operation
If vibration reduction elements are added between the housing parts, then handle vibration is reduced improving operator comfort, but the device complexity and number of components increases
Solution Approach 1:
The vibration reduction element is designed to perform multiple functions simultaneously: it reduces vibrations, provides mechanical support for the handle, and can be integrated into the existing housing structure. By making the vibration reduction element multi-functional, the patent minimizes the need for additional separate components, thus improving operator comfort while limiting the increase in device complexity.
3Object-affected harmful factors
If the handle housing is divided into separate parts with vibration reduction elements, then vibration decoupling is achieved, but manufacturing and assembly complexity increases
Solution Approach 1:
The handle housing is segmented into separate parts (first housing part and second housing part) with the vibration reduction element positioned between them. This segmentation allows for effective vibration decoupling as each part can be manufactured and optimized independently. The modular approach enables the vibration reduction element to be pre-assembled or pre-tested before integration into the complete tool, potentially simplifying the overall manufacturing process despite the increased number of components.
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 design significantly reduces handle vibration loads, enhancing operator comfort and reducing work stress while allowing for ergonomic design flexibility and efficient vibration damping without additional fastening means.
Implementation Method 1
A vibration reduction element is disposed between the fastening component and the handle... the vibration reduction element is located in the transmission chain from the further housing component, via the fastening element, to the handle, such that the transmission of vibrations from the fastening component to the handle is at least reduced
Implementation Method 2
The vibration reduction element is realized as a spring element
Data Source
AI summary
A hand-held power tool has a housing including at least two separate and interconnected housing parts, wherein one housing part forms a handle housing for holding and guiding the hand-held power tool. The handle housing includes a handle and a fastening component. The fastening component is connected to the other housing part and to the handle, and a vibration reduction element is arranged between the fastening component and the handle.