Tool Receiving Device for Rapid Handheld Machine Tool Changes
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Solution Overview
Problem
Existing machine tools with rotating or oscillating driving devices face challenges in securely and efficiently mounting and changing tool devices, leading to reduced productivity and safety risks due to inaccurate positioning and lengthy tool change times.
Innovation Solution
A machine tool with a tool receiving device featuring a clamping device, holding device, and locking device that allows for secure mounting and easy tool changes by aligning the tool axis of rotation with the driving axis, using a combination of spring devices and lever mechanisms to apply and release clamping forces, enabling quick and secure tool attachment and detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional tool mounting device is used, then the structure is simple, but the tool changing time is long and productivity is reduced
Solution Approach 1:
The holding device is designed to be movable between open and closed positions, allowing dynamic adaptation during tool changing. The spring device provides dynamic clamping force that can be quickly applied and released, enabling rapid tool exchange without manual intervention for each step.
Solution Approach 2:
The tool device automatically triggers the locking device to move from locked to unlocked position when inserted, and the spring device automatically applies clamping force when the holding device closes. This self-actuating mechanism eliminates the need for separate manual operations, significantly reducing tool change time.
2Manufacturing precision
If a secure tool mounting mechanism is implemented, then tool positioning accuracy is improved, but the device complexity increases
Solution Approach 1:
The locking device and holding device are integrated into a unified mounting mechanism. The locking device works in conjunction with the holding device to provide both secure positioning and reliable retention. This merging of functions achieves accurate tool positioning without requiring entirely separate complex systems.
Solution Approach 2:
The locking device acts as an intermediary between the tool device and the holding device. It mediates the positioning process by providing a locked position that ensures accurate alignment, then transitions to an unlocked state to allow the holding device to apply clamping force for secure retention.
3Productivity
If frequent tool changes are enabled, then productivity is enhanced, but the risk of injury from unsafe tool receiving increases
Solution Approach 1:
The automatic locking and clamping mechanisms eliminate the need for manual operations during tool changing. The system self-actuates through the tool device insertion, removing the operator from the immediate danger zone and eliminating risks associated with manual tool mounting operations.
Solution Approach 2:
The design prioritizes operator safety over mechanical simplicity, accepting the complexity of the mounting device as a necessary investment. The system uses reliable, proven mechanisms (springs, locks, clamps) that have been validated in safety-critical applications, ensuring consistent safe operation.
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
The solution ensures reliable and rapid tool changes, enhancing machine tool productivity and operator safety by providing a secure and efficient method for tool mounting and dismounting, reducing the risk of injury and extending tool life.
Implementation Method 1
The spring device is configured to apply a clamping force to the holding device in the direction of the closed position
Implementation Method 2
The locking device includes a lever mechanism that can be actuated by the tool device to move the holding device between positions
Data Source
AI summary
The invention relates to a machine tool, in particular a hand held machine tool, which has a tool-accommodating device which can be moved, in particular in oscillating fashion, about a drive axis, in order to retain a tool device on the machine tool. The tool-accommodating device has at least one clamping device, at least one retaining device and at least one locking device. The retaining device can be moved from at least one first, open position into at least one second, closed position. It is also the case that the retaining device can be forced by a clamping force, by way of the clamping device, preferably in the closing direction from said first, open position in the direction of said second, closed position. The locking device can be moved between at least one first, locking position and at least one second, unlocking position. It is possible here for said locking device to block movement of the retaining device in at least one locking position. A force applied to the locking device directly or indirectly by the tool device moves said locking device from one of said locking positions into one of said unlocking positions. This allows the tool device to be inserted particularly quickly and straightforwardly into the machine tool.