Hand-Held Power Tool Support Device Clamping Mechanism
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Solution Overview
Problem
Existing hand-held power tools, such as routers, face issues with vibration-induced separation of the support device from the machine housing, leading to impaired working results and safety concerns due to the release of clamping nuts.
Innovation Solution
A hand-held power tool with a support device featuring a swivelable clamping lever and rotatable clamping knob connected by a clamping screw, eliminating the need for a clamping nut and providing a high clamping force through a clamping collar mechanism, ensuring secure attachment to the machine housing even under vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a clamping nut is used to secure the support device to the machine housing, then the support device can be fixed to the machine housing, but the clamping nut may become released due to vibration and be lost
Solution Approach 1:
The patent removes the clamping nut from the clamping mechanism, eliminating the component that becomes lost due to vibration. The support device is clamped directly to the machine housing using a clamping screw with a clamping lever and clamping knob, without requiring a separate clamping nut that could detach and be lost.
Solution Approach 2:
The clamping mechanism is divided into distinct functional components: a clamping screw with threaded portion, a swivelable clamping lever, and a rotatable clamping knob. This segmentation allows each component to perform its specific function while being securely integrated, preventing any single component from becoming detached and lost.
2Reliability
If a clamping nut is used to secure the support device, then the support device can be fixed, but the clamping nut may separate from the clamping screw under vibration
Solution Approach 1:
The clamping nut is completely removed from the assembly, eliminating the potential for separation between the clamping nut and clamping screw. The direct connection between the clamping screw and the support device carrier element provides a more stable and vibration-resistant connection.
Solution Approach 2:
The clamping lever is designed to be swivelable rather than fixed, allowing it to dynamically adjust to vibrations and operational forces while maintaining the clamped state. This dynamic capability enables the clamping mechanism to absorb vibrations without compromising the stability of the connection.
3Reliability
If a clamping nut and screw system is used, then the support device can be clamped, but the system becomes more complex and prone to part loss
Solution Approach 1:
The clamping lever and clamping knob are integrated with the clamping screw to form a unified clamping mechanism. The clamping lever is connected to the clamping screw, and the clamping knob is connected to the clamping lever, creating a combined system that eliminates the need for a separate clamping nut and reduces overall complexity.
Solution Approach 2:
The clamping nut is removed from the system, simplifying the clamping mechanism by reducing the number of components. This extraction of the unnecessary component decreases device complexity while maintaining or improving the reliability of the attachment.
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 prevents separation of the support device during use, ensuring optimal working results and high safety by maintaining a secure clamping force, allowing for ergonomic and rapid fixation without the risk of lost clamping nuts, and enabling precise height adjustments.
Implementation Method 1
The support device can be clamped to the machine housing by means of a swivelable clamping lever and/or a rotatable clamping knob, the clamping lever and the clamping knob being connected to each other by means of a clamping screw
Implementation Method 2
providing a high clamping force through a clamping collar mechanism, ensuring secure attachment to the machine housing even under vibration
Implementation Method 3
A swivelable clamping lever and/or a rotatable clamping knob connected by a clamping screw... providing a high clamping force through a clamping collar mechanism
Data Source
AI summary
A hand-held power tool includes a machine housing and a support device configured to guide the hand-held power tool in a plane-parallel manner on a workpiece. The support device has a substantially hollow-cylindrical carrier element configured to at least portionally receive the machine housing. The carrier element has a longitudinal slot and a foot plate. The foot plate is disposed at a defined angle at an axial end facing toward the workpiece. The foot plate has a recess for an insert tool. The carrier element is clampable to the machine housing by a swivelable clamping lever and/or a rotatable clamping knob. The clamping lever and the clamping knob are connected to each other by a clamping screw.