Battery Cut-Off Tool Layout for Heat and Vibration Isolation
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Solution Overview
Problem
Hand-held work tools for cutting and/or abrading hard materials like concrete and stone face challenges with heat generation, vibration, exposure to harsh environments, and inefficient battery handling, leading to discomfort and tool failure.
Innovation Solution
A hand-held work tool design with a first part and a second part vibrationally isolated by resilient members, featuring a cooling system with a fan to cool both the motor and battery, and a secure battery compartment with a locking mechanism, along with a vibration isolation system to reduce operator discomfort and tool failure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If powerful motors are used to provide required power for cutting hard materials, then cutting power is improved, but heat generation increases causing overheating
Solution Approach 1:
The tool is divided into two vibrationally isolated parts: a first part containing the motor and cutting disc, and a second part containing the battery and control electronics. This segmentation allows independent thermal management of each component, with cooling channels specifically designed for the motor compartment.
Solution Approach 2:
Damping members formed in resilient material with damping coefficient are introduced as intermediaries between the first and second parts. These damping members serve as thermal barriers while maintaining mechanical connection, preventing heat transfer from the motor to the battery compartment.
2Ease of operation
If vibration isolation is implemented between motor and battery, then operator comfort is improved, but structural complexity increases
Solution Approach 1:
The damping members are designed with specific damping coefficients and resilient material properties to optimize vibration isolation performance. By adjusting material parameters and geometric dimensions, effective vibration reduction is achieved without requiring complex multi-component isolation systems.
Solution Approach 2:
The damping members are formed in resilient material that combines vibration damping properties with structural integrity. This composite approach provides both vibration isolation and mechanical support functions in a single component, reducing overall structural complexity.
3Temperature
If cooling systems are added to manage heat, then temperature control is improved, but device complexity increases
Solution Approach 1:
The cooling system is integrated with the existing tool structure, using the tool housing itself as part of the thermal management system. Cooling channels are incorporated into the motor compartment design, eliminating the need for separate cooling assemblies and reducing overall complexity.
Solution Approach 2:
The cooling system is designed to utilize ambient air flow and the tool's own operational movements to facilitate heat dissipation. The damping members themselves serve as thermal barriers, providing passive thermal management without requiring active cooling mechanisms.
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 design significantly reduces vibration and heat, enhances tool durability, and improves battery security, allowing for longer and more comfortable operation in harsh environments.
Implementation Method 1
one or more damping members are arranged in-between the first part and the second part, where at least one damping member is formed in a resilient material associated with a damping coefficient
Implementation Method 2
at least one damping member is formed in a resilient material associated with a damping coefficient
Implementation Method 3
a cooling system with a fan to cool both the motor and battery
Data Source
AI summary
A hand-held electrically powered cut-off tool (100, 200, 800, 1000, 1900) comprising a first part (110) and a second part (120) arranged vibrationally isolated from each other, the first part (110) comprising an arm (116) arranged to support a cutting disc (130) and an electric motor (140) arranged to drive the cutting disc, the second part (120) comprising front (190) and rear (195) handles for operating the cut-off tool, and a battery compartment (150) for holding an electrical storage device (220, 1800) such as a battery arranged to power the electric motor (140), wherein one or more damping members (170, 1910) are arranged in-between the first part (110) and the second part (120), where at least one damping member (170, 1910) is formed in a resilient material associated with a damping coefficient.