Detent Impact Accessory for Percussion Drilling
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Solution Overview
Problem
Existing hand-held power tool systems lack an efficient mechanism for generating impact impulses necessary for percussion drilling in hard materials like concrete or rock, limiting their versatility and application range.
Innovation Solution
A compact accessory device with a notched percussion mechanism unit that converts rotary drive into axial movement, featuring a drive element connected to the insert tool holder, a spring element for intuitive operation, and a locking unit for flexible use, allowing for percussion drilling operations with various tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a hand-held power tool is equipped with a built-in percussion mechanism for drilling hard materials, then the tool can perform percussion drilling operations, but the tool structure becomes more complex and larger
Solution Approach 1:
The percussion mechanism is separated from the main power tool and placed in a detachable accessory device. This segmentation allows the power tool to remain simple while the accessory provides the additional percussion functionality when needed.
Solution Approach 2:
The accessory device is designed with a universal coupling unit that can be attached to various power tools with compatible tool holders. The accessory can perform both rotary drilling and percussion drilling operations, making it multi-functional and adaptable to different applications.
2Adaptability or versatility
If a dedicated percussion drill is provided for drilling hard materials, then percussion drilling capability is achieved, but the user must own and maintain multiple separate tools
Solution Approach 1:
The accessory device merges the functions of a standard drill and a percussion drill into a single unit. By attaching the accessory to a regular power tool, the user gains percussion drilling capability without needing a separate dedicated percussion drill.
Solution Approach 2:
The accessory is designed to be universally compatible with various power tools through standardized coupling mechanisms, allowing one accessory to enhance multiple different base tools rather than requiring separate specialized tools for each function.
3Adaptability or versatility
If an accessory device is designed to be compatible with various base units, then the overall utility and versatility of the system increases, but the coupling mechanism becomes more complex
Solution Approach 1:
The coupling unit incorporates self-aligning and self-locking features that automatically engage the accessory with the power tool without requiring complex adjustment mechanisms. The detent elements and inclined surfaces work automatically to secure the connection.
Solution Approach 2:
The coupling mechanism is divided into separate functional elements (coupling unit with detent elements, locking elements, and inclined surfaces) that work independently but cooperatively. This modular segmentation simplifies each component while achieving universal compatibility through standardized interfaces.
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
Enables efficient percussion drilling in hard materials, expanding the application range of hand-held power tools, providing high user comfort, and allowing for easy exchange of accessory devices, thus enhancing the overall utility and versatility of the system.
Implementation Method 1
a detent impact unit (20) which, in at least one operating state, is designed to generate an impact impulse (19) for a percussion drive of the tool holder (18)
Data Source
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AI summary
The invention relates to an accessory device for an arrangement on a hand-held power tool (12), comprising at least one coupling unit (14) designed for detachable mechanical coupling with the hand-held power tool (12), in particular with a coupling to a tool holder (16) of the hand-held power tool (12), and a tool holder (18) for receiving a tool. It is proposed that the accessory device includes at least one detent impact unit (20) designed in at least one operating state to generate an impact impulse for an impact drive of the tool holder (18).