Portable Power Tool Braking Module
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Solution Overview
Problem
Existing machine tool braking devices for portable power tools are inefficient in reducing rotational speed without generating friction, and they often require complex integration and high production costs.
Innovation Solution
A portable machine tool braking device designed as an assembly module with a mechanical, electromagnetic, or eddy current brake unit, featuring a magnetic field-based braking mechanism that decouples from friction, allowing for easy integration and low production costs, and can be detached and replaced with minimal fastening elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a friction-based braking mechanism is used, then the braking function is achieved, but friction is generated causing heat and wear
Solution Approach 1:
The patent replaces the traditional friction-based mechanical braking system with an electromagnetic braking system. The electromagnetic brake uses magnetic fields to generate braking force without physical contact between braking surfaces, thereby eliminating friction-related heat and wear while maintaining effective braking function.
Solution Approach 2:
The patent changes the fundamental operating parameter of the braking system from friction-based force generation to electromagnetic force generation. By utilizing electromagnetic induction and magnetic field interactions, the system achieves braking through non-contact forces, transforming the physical mechanism from mechanical friction to electromagnetic interaction.
2Reliability
If a complex braking system is integrated into portable power tools, then braking performance is improved, but device complexity and production costs increase
Solution Approach 1:
The electromagnetic brake unit is designed as a multi-functional assembly that can be integrated into various types of portable power tools (drills, grinders, saws, etc.). The standardized design with universal mounting interfaces allows the same braking mechanism to serve multiple tool applications, reducing overall system complexity and production costs while maintaining consistent braking performance across different tool types.
Solution Approach 2:
The braking system is segmented into a modular electromagnetic brake unit that can be independently installed and removed. This segmentation separates the braking function from the main tool structure, allowing for simplified integration where the brake unit is mounted as a distinct assembly on the tool housing, thereby reducing the complexity of integrating braking into each specific tool design.
3Stability of the object's composition
If the brake unit is designed as a fixed integrated component, then structural stability is maintained, but adaptability and ease of replacement are reduced
Solution Approach 1:
The brake unit is designed as a separable module rather than a permanently fixed component. It is divided into distinct parts (brake mechanism, mounting bracket, fastening elements) that can be easily detached and reattached. This segmentation maintains structural stability during operation while enabling simple replacement when needed, resolving the contradiction between stability and adaptability.
Solution Approach 2:
The mounting system incorporates dynamic characteristics by using removable fastening elements (screws, clips, or bayonet mounts) that allow the brake unit to be securely fixed during operation but easily detached when required. This dynamic mounting approach enables the system to transition between stable operation and easy replacement based on operational needs.
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 braking device effectively reduces rotational speed without friction, ensuring reliable operation and low maintenance costs, while allowing for flexible integration into various portable machine tools.
Implementation Method 1
the braking unit is designed as an electromagnetic brake... by using a magnetic field, reduces a speed, in particular a rotational speed, of a moving component
Implementation Method 2
the brake unit is designed as an eddy current brake... uses eddy current losses of a metallic element moving in a magnetic field to brake the element
Implementation Method 3
the braking unit is designed as a hysteresis brake... generates a braking force and/or a braking torque by means of reversing the magnetization of an element moving in a magnetic field
Data Source
AI summary
The invention relates to a power tool braking device, in particular to a portable power tool braking device, for a portable power tool (12a; 12b; 12c; 12d; 12e) having at least one braking unit (14a; 14b; 14c; 14d; 14e). It is proposed that the braking unit (14b; 14c; 14d; 14e) be formed as an installation module (54a; 54b; 54c; 54d; 54e).