Dual Vibration Decoupling for Hand-Guided Soil Compactor Battery Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing soil compaction devices experience high vibrations that can damage starter batteries and pose a strain on operators, despite vibration decoupling measures, due to the intense vibration amplitudes exceeding those in normal road traffic.
Innovation Solution
A hand-held soil compaction device with a dual vibration decoupling system, featuring a first decoupling device between the lower and upper masses and a second decoupling device between the upper mass and drawbar carrier, effectively reducing vibrations transmitted to the starter battery and operator by using elastic bearings and strategically placed buffer elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single vibration decoupling device is used between upper mass and lower mass, then some vibration protection is achieved, but acceleration values remain too high and can damage the starter battery
Solution Approach 1:
The vibration decoupling system is divided into two separate stages: first vibration decoupling device between upper mass and lower mass, second vibration decoupling device between drawbar carrier and upper mass. This segmentation allows progressive reduction of vibration acceleration through multiple decoupling stages, protecting the starter battery while maintaining control forces.
Solution Approach 2:
The drawbar carrier serves as an intermediary component between the upper mass and the guide drawbar. It provides a mounting point for the starter battery while being vibrationally decoupled from both the upper mass (via second decoupling device) and indirectly from the lower mass (via first decoupling device), creating an intermediate vibration-reduced zone.
2Reliability
If vibration decoupling measures are implemented to protect the starter battery, then battery damage is reduced, but control forces and steering forces may be weakened
Solution Approach 1:
The vibration decoupling devices use elastic elements that dynamically respond to different types of forces. They are designed to attenuate high-frequency vibrations while allowing low-frequency control and steering forces to pass through effectively, achieving frequency-selective force transmission.
Solution Approach 2:
The elastic elements in the vibration decoupling devices are designed with specific stiffness and damping parameters that optimize the balance between vibration attenuation and force transmission. By carefully selecting these parameters, the system protects the battery from high-frequency vibrations while maintaining sufficient low-frequency control forces.
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 dual vibration decoupling system significantly reduces the transmission of high vibrations to the electrical energy store and guide drawbar, protecting the battery and operator from excessive strain, while maintaining control and steering forces effectively.
Implementation Method 1
a first vibration decoupling device arranged between the lower mass and the upper mass for vibrationally decoupling the upper mass from the lower mass
Implementation Method 2
a drawbar carrier, which is carried by the upper mass and which is connected to the upper mass via a second vibration decoupling device
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A hand-held work device is described, comprising a lower mass (1) that includes a tool (3) and a working device for effecting a working movement of the tool (3); an upper mass (2) that is movable relative to the lower mass (1) and includes a drive motor for the working device; a first vibration decoupling device (6) arranged between the lower mass (1) and the upper mass (2) for vibrationally decoupling the upper mass (2) from the lower mass (1); a guide handle (16) for guiding the work device by an operator; and an electrical energy storage device (13) for providing electrical energy to start the drive motor; a handle support (8) is provided, which is supported by the upper mass (2) and which is connected to the upper mass (2) via a second vibration decoupling device (10); the guide handle (16) being attached to the handle support (8).and wherein the energy storage device (13) is supported by the drawbar support (8).