Vibration-Decoupled Battery Mounting Rails for Electric Hand Tools
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Solution Overview
Problem
Existing electric hand tools with vibration-damped connection interfaces for battery units provide limited vibration damping, which can lead to damage from strong drive-related vibrations.
Innovation Solution
A vibration-decoupled connection interface featuring spaced-apart retaining rail parts with elastomer elements, allowing for both vibration isolation and a modular design that can be adapted to different power tools, including a three-dimensional decoupling mechanism using a support pin and elastomer element under preload.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a single elastomer buffer is placed in front of the battery unit for vibration damping, then some vibration protection is provided, but the vibration damping effect is limited and insufficient for strong drive-related vibrations
Solution Approach 1:
The single elastomer buffer is segmented into multiple elastomer elements (at least two) that are spaced apart from each other. This segmentation distributes the vibration isolation function across multiple points, significantly improving the overall vibration damping effectiveness while maintaining the same basic approach of using elastomeric materials.
Solution Approach 2:
The elastomer elements are arranged in a spaced-apart configuration rather than a single concentrated position. This spatial distribution creates a multi-dimensional vibration isolation system that addresses vibrations from multiple directions and frequencies, enhancing protection against strong drive-related vibrations.
2Object-affected harmful factors
If vibration decoupling components are added to protect the battery unit, then vibration protection is improved, but the space required for the connection interface increases
Solution Approach 1:
The mounting module is designed with universal applicability, allowing it to be used in both vibration-decoupled and non-vibration-decoupled configurations. The retaining rail parts and elastomer elements are integrated in a way that provides vibration protection without requiring additional space beyond what is needed for the basic mounting function.
Solution Approach 2:
The vibration decoupling function is merged with the existing mounting structure. The elastomer elements are integrated into the retaining rail parts, combining the mechanical retention function with the vibration isolation function in a single compact assembly, thereby avoiding additional space requirements.
3Object-affected harmful factors
If a vibration-decoupled connection interface is implemented, then battery unit protection is improved, but the device complexity increases due to additional components
Solution Approach 1:
The mounting module is designed to be universal, capable of functioning in both vibration-decoupled and non-vibration-decoupled configurations. This universality reduces overall system complexity by using a single modular component that can adapt to different protection requirements without requiring entirely different assembly structures.
Solution Approach 2:
The connection interface incorporates dynamic elements (elastomer elements) that automatically adapt to vibration conditions. These elements provide passive vibration isolation without requiring active control systems or complex mechanical adjustments, thereby maintaining simplicity while improving protection.
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 achieves effective and space-saving vibration decoupling, protecting the battery unit from damage while maintaining a universal compatibility with various power tools.
Implementation Method 1
a vibration-decoupled connection interface comprises spaced-apart retaining rail parts (6a, 6b) for the accumulator unit (5), which are attached to the rail housing (1) via at least one associated elastomer element (7)
Implementation Method 2
Since the vibration transmission to the accumulator unit occurs via the elastomer elements, a spring-like and, due to the material properties, also a damping reduction of the vibrations takes place
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to an electric hand tool with a handheld machine housing (1) for accommodating an electromechanical drive unit (2) for a tool holding unit (3), and with an accumulator unit (5) serving to supply electrical power to the drive unit (2), which is detachably attached to the machine housing (1) via a vibration-isolated connection interface (4), wherein the vibration-isolated connection interface (4) comprises spaced-apart retaining rail parts (6a, 6b) for the accumulator unit (5), which are attached to the machine housing (1) via at least one associated elastomer element (7; 7').