Cavity-Structured Damping Element for Lawn Mower Handle Vibration
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Solution Overview
Problem
Manually guided motorized lawn and garden care implements cause vibrations, and existing damping arrangements require a large number of components, making them complex and inefficient.
Innovation Solution
A damping arrangement for the handle of these implements using a small number of damping elements with cavities or recesses, which can be easily assembled and feature varying damping characteristics, connected directly to the handle or housing, and incorporating overload protection for enhanced durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If known damping arrangements are used to reduce vibrations, then vibration damping is achieved, but the number of components increases
Solution Approach 1:
The patent combines multiple damping functions into a single integrated damping element that is directly mounted on the handle. This single element incorporates cavities and recesses to provide vibration damping in multiple directions, eliminating the need for separate damping components arranged perpendicular to each other as in prior art.
Solution Approach 2:
The damping element features locally optimized cavities and recesses positioned at specific locations on the handle surface. These cavities are strategically placed to address vibration patterns at different locations, providing targeted damping where needed while maintaining a simple single-component structure.
2Reliability
If multiple damping elements with varying characteristics are used, then damping performance is improved, but manufacturing complexity increases
Solution Approach 1:
The damping element is segmented into multiple functional zones with different cavity configurations, allowing each region to address specific vibration characteristics. This segmentation provides varied damping performance within a single manufacturable component that can be produced as one piece rather than requiring assembly of multiple separate elements.
Solution Approach 2:
The single damping element serves multiple damping functions simultaneously by incorporating different cavity types and configurations in different regions. This multi-functional design achieves comprehensive vibration damping performance while simplifying manufacturing and assembly compared to using multiple specialized damping 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
The solution effectively reduces vibration transmission with a simpler design that is easy to manufacture and maintain, allowing for customizable damping performance and protection against excessive loads.
Implementation Method 1
The damping arrangement includes one or more damping elements, with each damping element having cavities or recesses
Implementation Method 2
DE-A-35 03 398 shows an elastic bearing arrangement of handgrips of handles for motorized implements guided by two hands
Data Source
AI summary
An implement for lawn and garden care includes a housing, a drive, and a handle attached to the housing with a vibration damping arrangement. The damping arrangement includes an at least partially elastic damping element. The stiffness of the damping element is determined by its cross section that includes at least one cavity or recess.