Clamping-Wing Tool Holder for Fast, Low-Vibration Tool Changes
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Solution Overview
Problem
Existing tool devices for hand-held power tools lack efficient mechanisms for minimizing vibrations and ensuring secure, rapid tool changes without the need for additional securing elements, leading to suboptimal performance and compatibility issues with conventional power tools.
Innovation Solution
A tool device with a connector system featuring clamping wings that provide a clearance for precise alignment and secure fastening, allowing for vibration-minimizing operation and easy tool changes, while ensuring compatibility with conventional power tools through a design that includes asymmetrical clamping wings and a support flange for robust connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a connector device without clearance is used, then alignment precision is improved, but tool change speed deteriorates and vibration increases
Solution Approach 1:
The connector device is segmented into multiple functional elements: clamping wings for rapid engagement, a clearance for alignment tolerance, and asymmetric features for orientation. This segmentation allows each element to perform its specific function optimally - the clearance enables quick insertion while the clamping wings provide secure fastening, resolving the contradiction between alignment precision and tool change speed.
Solution Approach 2:
The clearance in the connector device performs a preliminary alignment function during the tool change process. By providing built-in alignment tolerance through the clearance, the system eliminates the need for precise manual alignment, thereby speeding up tool changes while maintaining adequate alignment precision.
2Reliability
If additional securing elements are used, then connection reliability is improved, but device complexity increases
Solution Approach 1:
The clamping wing combines multiple functions into a single integrated component: it provides clamping force, features asymmetric geometry for orientation guidance, and includes clearance for alignment. This merging of functions into one element achieves reliable connection without requiring separate securing elements, thereby reducing device complexity while maintaining connection reliability.
Solution Approach 2:
The asymmetric clamping wing design enables self-alignment and self-orientation during tool attachment. The clearance and asymmetric features guide the tool into the correct position automatically, eliminating the need for additional securing elements or complex alignment mechanisms, thus achieving reliable connection with simpler device structure.
3Ease of operation
If symmetric clamping wings are used, then ease of assembly is improved, but vibration minimization deteriorates
Solution Approach 1:
The clamping wing employs asymmetric geometry that provides built-in orientation guidance during assembly. This asymmetry creates a preferred mounting orientation that minimizes vibration during operation, while the asymmetric design itself does not complicate assembly since the clearance accommodates the asymmetric features. The asymmetry resolves the contradiction by enabling vibration minimization without sacrificing ease of assembly.
Data Source
AI summary
A tool device for a hand-held power tool, which can be operated such that the tool device is rotated about an output shaft of a tool-holding device, has at least one connecting device, which is detachably connected to an output shaft of the power tool. The connecting device is fastened to the tool-holding device so that a drive axis of the output shaft and a tool axis of rotation substantially coincide. The connecting device has a cut-out and at least one clamping wing, which at least partly bounds the cut-out in the radial direction of the tool axis of rotation and which is bounded substantially in the direction radial to the tool axis of rotation by a first bounding edge, which lies on a first bounding circle around the tool axis of rotation. The clamping wing extends at least substantially along a plane orthogonal to the tool axis of rotation.