Oscillating Tool Adapter Assembly for Eccentric Clamping
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Solution Overview
Problem
Existing fastening systems for hand-held power tools with oscillating rotational movement require complex adapter parts and partial clamping mechanisms, leading to inefficient assembly and reduced versatility when using tools with large window areas or central openings.
Innovation Solution
A fastening system featuring a clamping head with a clamping flank that can be moved eccentrically, combined with a frusto-conical adapter element that allows axial assembly and distribution of clamping force over a larger circumference, enabling secure attachment without requiring separation from the drive profile section and accommodating different tool designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a clamping head with a clamping flank is used to fasten the output profile section to the drive profile section, then the tool can be securely attached, but the assembly process becomes complex and requires separation from the drive profile section when using tools with large window areas or central openings
Solution Approach 1:
The patent introduces an adapter element as an intermediary component between the clamping head and the output profile section. This adapter element features an inner edge that engages with the clamping flank and an outer edge that rests on the broad side of the output profile section, mediating the connection and enabling secure attachment without complex assembly procedures
Solution Approach 2:
The fastening system is segmented into distinct functional components: the drive profile section with driving projections, the output profile section with niches and broad side, the clamping head with clamping flank, and the adapter element with inner and outer edges. This segmentation allows each component to perform its specific function independently, simplifying the overall assembly process
2Ease of manufacture
If the clamping head is arranged concentrically to the axis of rotation, then the assembly is straightforward, but the clamping force cannot be distributed over a larger circumference
Solution Approach 1:
The patent transitions from a one-dimensional concentric arrangement to a two-dimensional eccentric arrangement of the clamping head relative to the axis of rotation. This dimensional change allows the clamping flank to engage the adapter element at an offset position, enabling clamping force to be distributed over a larger circumference while maintaining assembly straightforwardness through the mediating adapter element
3Force
If the adapter element is designed with a frusto-conical shape, then the clamping force is distributed over a larger circumference, but the adapter element requires radial movement from push-through position into clamping position
Solution Approach 1:
The adapter element is designed with dynamic characteristics, allowing it to move radially from a push-through position during initial assembly to a clamping position where the inner edge engages with the clamping flank. This dynamic movement enables the frusto-conical shape to effectively distribute clamping force over a larger circumference while maintaining ease of operation through a simple two-position assembly process
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
Facilitates simple and versatile assembly of output profile sections onto drive profile sections, ensuring secure clamping and centering, while allowing use on various tool designs without the need for additional adapter parts, enhancing tool compatibility and ease of use.
Implementation Method 1
If the adapter element has the preferred configuration as a plate spring, the clamping force introduced eccentrically into the adapter element is distributed over the entire circumference of the large-diameter edge of the adapter element
Data Source
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AI summary
The invention relates to a fastening system for fastening a driven profile section (2) of a tool (1) to a drive profile section (12) of a hand-held power tool (10) which can be brought into an oscillating rotary motion by a motor about an axis of rotation (11), the drive profile section (12) being uniform angular distribution on an arc of a circle around the axis of rotation (11) and has entraining projections (14) protruding axially from a support area (13), the driven profile section (2) having a window (3) with an edge (5) and in one on the Has niches (4) arranged adjacent to the edge (5) for the entry of the driving projections (14) and is designed as a flat piece, with a first broad side (7) which rests on the support area (13) and a second broad side (8) lying opposite this , against which an outer edge (21) of an adapter element (22) rests, the inner edge (22) of which is supported by a clamping flank (32) of an eccentric to D axis (11) arranged clamping head (31) is acted upon in the axial direction.