Pivoting Tool Holder for Tool-Free Axial Clamping
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Solution Overview
Problem
Existing tool holders for handheld power tools face challenges in providing a simple, user-friendly, and cost-effective way to couple application tools with a high level of operating convenience, especially in accommodating different tools and minimizing axial space usage.
Innovation Solution
A tool holder design featuring a translation unit with a slotted guide or inclined surface to convert non-axial movements into clamping force, a hollow cylinder drive shaft enclosing the clamping element, a pivotable bearing unit with a radial support element, and a spring-loaded clamping mechanism, allowing for flexible mounting and space-efficient storage of fastening elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional tool holder design is used, then the structure is simple, but the coupling of application tools is not user-friendly and requires centering recesses that increase axial space
Solution Approach 1:
The fastening element is designed to be movable relative to the drive shaft, allowing it to pivot between a retracted position (for tool insertion) and a clamping position (for securing the tool). This dynamic mechanism enables tool-free coupling without requiring centering recesses, thus improving ease of operation while reducing axial space requirements
Solution Approach 2:
The spring element automatically pushes the fastening element into the clamping position after tool insertion, and the translation unit automatically converts the insertion movement into clamping force. This self-actuating mechanism eliminates the need for manual centering operations and reduces axial space while maintaining user-friendly coupling
2Ease of operation
If a pivotable fastening element is used, then coupling becomes tool-free and user-friendly, but the device complexity increases
Solution Approach 1:
The translation unit combines the bearing unit, spring element, and fastening element into an integrated mechanism where the fastening element's pivotable movement is directly coupled with the clamping action. This merging of functions reduces the number of separate components and simplifies the overall device structure while maintaining tool-free coupling capability
Solution Approach 2:
The fastening element serves multiple functions: it acts as a bearing surface for the application tool, a clamping element for securing the tool, and a translation element that converts insertion movement into clamping force. This multi-functionality reduces the need for separate components, thereby reducing device complexity while enabling tool-free coupling
3Adaptability or versatility
If the fastening element is mounted pivotably, then it can accommodate different tools, but the mounting complexity increases
Solution Approach 1:
The tool holder is segmented into modular components: the drive shaft, the bearing unit with fastening element, and the translation unit. This segmentation allows the fastening element to be independently mounted pivotably on the bearing unit, enabling tool compatibility while keeping the mounting structure relatively simple and maintainable
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 a simple, cost-effective, and reliable tool coupling system that supports various application tools, reduces wear, and extends tool life by eliminating the need for centering recesses, thus enhancing operational convenience and reducing axial space requirements.
Implementation Method 1
a spring element (52) is supported on the support element (50) of the tensioning element (24) in the axial direction (18), the spring element (52) being formed by a helical spring, the spring element (52) being formed by a compression spring
Implementation Method 2
the translation unit has, in particular, a translation contour, such as a slotted guide or an inclined surface
Implementation Method 3
the translation unit has, in particular, a translation contour, such as a slotted guide or an inclined surface, a lever mechanism
Data Source
Figure 1
Figure 2~3
Figure 4a~4b
AI summary
The invention relates to a tool holder (10, 110, 210), particularly a hand-held power tool holder, which is provided for an oscillating and/or rotational drive of at least one insertion tool (12) comprising at least one holder-side fastening element (14, 114, 214) that is provided at least substantially for a coupling with the insertion tool (12), and comprising at least one bearing unit (16, 116, 216) that is provided for movably mounting the fastening element (14, 114, 214) in a movement at least partially deviating from an axial direction (18). According to the invention, the movement at least partially deviating from the axial direction (18) of the at least one fastening element (14, 114, 214) is provided at least substantially for creating a fastening force in the axial direction (18).