Grinding Machine Dust Collector Pivot Clamp for Tool-Free Attachment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing dust removal devices for hand-held machine tools, such as grinding machines, require complex activation mechanisms, often needing a screwdriver to secure the dust collection container, which is inconvenient for temporary or frequent attachment and detachment.
Innovation Solution
A dust removal device with a pivot lever that pivots between clamping and release positions, allowing easy activation with a small angle and assisted by a spring mechanism for effortless detachment, featuring a clamping mechanism with adjustable clamping legs and a shape-fit contour for secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a screw mechanism is used to activate the clamping mechanism, then the clamping force and secure attachment are improved, but the ease of operation deteriorates due to requiring a screwdriver and complex activation
Solution Approach 1:
The patent replaces the screw mechanism with a pivot lever mechanism that operates through simple rotational movement. The pivot lever (57) pivots about a pivot axis (57A) between clamping and release positions, eliminating the need for screwdrivers and complex threading operations while maintaining secure attachment through the clamping mechanism (52).
Solution Approach 2:
The patent introduces a spring mechanism (57J) that dynamically assists the pivot lever during operation. The spring provides automatic return force and reduces the activation effort required, enabling effortless detachment and attachment operations while maintaining reliable clamping when engaged.
2Reliability
If a complex activation mechanism is used, then the clamping force is improved, but the device complexity increases
Solution Approach 1:
The patent segments the activation function into two independent components: a pivot lever (57) for manual activation and a spring mechanism (57J) for assisted return. This segmentation simplifies each component's design while collectively achieving reliable clamping with reduced overall system complexity compared to integrated screw mechanisms.
Solution Approach 2:
The spring mechanism (57J) provides self-service by automatically returning the pivot lever to the release position after activation, eliminating the need for additional release mechanisms or complex control systems. This self-returning feature reduces device complexity while maintaining effective clamping force during operation.
3Ease of operation
If a pivot lever with small pivot angle is used, then the ease of operation is improved, but the clamping reliability may deteriorate
Solution Approach 1:
The patent employs asymmetric design in the pivot lever mechanism where the activation stroke (from release to clamping) requires only a small pivot angle for ease of operation, while the spring mechanism provides asymmetric force distribution that ensures reliable clamping engagement. The spring's mechanical properties create different force characteristics during engagement versus disengagement phases.
Solution Approach 2:
The patent changes the physical parameters of the spring mechanism (57J) including its stiffness, preload force, and mounting position to optimize the balance between ease of activation and clamping reliability. By adjusting these parameters, the system achieves both small pivot angle operation and secure clamping engagement.
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 convenient and secure attachment and detachment of the dust removal device to the machine tool without the need for tools, enhancing user experience and efficiency.
Implementation Method 1
assisted by a spring mechanism for effortless detachment
Data Source
AI summary
A dust removal device, in particular dust collection device, for a hand-held machine tool, in particular a grinding machine or saw, has a tubular connection body for connecting to a tubular dust removal connector of the tool. A dust/air stream for conveying away dust from grinding machine operation can flow from a dust removal space to the device, via the connector. The body has a clamping mechanism for clamping to the connector with an activation element for activating it between release and clamping positions. An accommodation cross-section of the body for the connector is smaller in the clamping position for clamping connector to body than in the release position for removing device from connector. The element includes a pivot lever mounted to pivot about a pivot axis and angle, between a clamping activation position assigned to the clamping position and a release activation position assigned to the release position.