Clamping Wing Tool Coupling for Fast, Low-Vibration Tool Changes
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Solution Overview
Problem
Hand-held power tools lack efficient and quick connection mechanisms for tool devices, often requiring additional securing elements and tools, leading to increased vibration and complexity during operation.
Innovation Solution
A tool device with a connection device featuring clamping wings that securely attach to the tool receiving device without additional tools, ensuring alignment and minimizing vibrations through a recess design that allows for torque transmission and vibration absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional connection mechanisms are used, then additional securing elements and tools are required, but this increases device complexity and operation time
Solution Approach 1:
The connection device is designed to automatically clamp onto the output shaft through spring-loaded clamping wings that self-adjust and self-lock without requiring external tools or additional securing elements. The clamping wings automatically engage with the shaft surface through elastic deformation, eliminating the need for manual intervention or complex fastening mechanisms.
Solution Approach 2:
The invention extracts and eliminates the need for additional securing elements (screws, nuts, clips) and external tools (wrenches, screwdrivers) from the connection mechanism. The clamping wings themselves perform both the clamping and securing functions, simplifying the overall connection system to its essential components.
2Strength
If additional securing elements are used, then connection strength is improved, but vibration increases during operation
Solution Approach 1:
The invention converts the potentially harmful rigid connection into a beneficial elastic connection. The spring-loaded clamping wings use elastic deformation to create a compliant connection that absorbs vibrations and shocks during operation, transforming what would be transmitted vibrations into useful elastic energy storage and dissipation.
Solution Approach 2:
The connection strength is maintained through controlled elastic deformation parameters of the clamping wings. The spring constant, wing geometry, and material properties are optimized to provide sufficient clamping force while allowing micro-movements that reduce vibration transmission. The elastic modulus and wing thickness are specifically selected to balance strength and vibration absorption.
3Adaptability or versatility
If conventional connection devices are used, then compatibility is achieved, but alignment precision deteriorates
Solution Approach 1:
The clamping wings are designed with asymmetric geometry relative to the output shaft, with one wing positioned to provide primary clamping force and another to provide alignment guidance. This asymmetric arrangement creates a self-aligning mechanism where the wings naturally orient themselves during the clamping process, ensuring precise coaxial alignment between the tool device and output shaft.
Solution Approach 2:
The clamping wings are pre-positioned and pre-loaded in a relaxed state before contact with the output shaft. As the tool device approaches the shaft, the springs are pre-compressed, and the wings automatically adjust their position to accommodate minor misalignments, performing the alignment function before full engagement occurs.
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 quick and secure tool changes, reduces vibrations during operation, and ensures compatibility with conventional machine tools, enhancing operator convenience and tool stability.
Implementation Method 1
The clamping wing can have a torque-absorbing area, in particular a drive edge and/or a drive surface, for receiving a torque in the circumferential direction around the tool rotation axis
Implementation Method 2
ensuring alignment and minimizing vibrations through a recess design that allows for torque transmission and vibration absorption
Data Source
Figure 1
Figure 2
Figure 3a~3b
AI summary
The invention relates to a tool device (11), in particular for machining a workpiece, for receiving in a hand-held power tool (211) rotatably about an output shaft of a tool holding device (213), comprising at least one connecting device (13) which can be detachably connected to an output shaft of the hand-held power tool (211), wherein the connecting device (13) can be attached to the tool holding device (213) in such a way that a drive axis (A) of the output shaft and a tool rotation axis (a) of the tool device (11) essentially coincide, wherein the connecting device (13) has a recess (17).It is proposed that the connecting device (13) has at least one clamping wing (19) which at least partially limits the recess (17) in the radial direction of the tool rotation axis (a), which is essentially limited in the radial direction to the tool rotation axis (a) by a first limiting edge (21) which lies on a first, in particular minimal, limiting circle (23) around the tool rotation axis (a), wherein the clamping wing (19) extends at least essentially along an orthogonal plane to the tool rotation axis (a).