Rotating Support Ring for Handheld Cutting Device Stability
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Solution Overview
Problem
Handheld motorized cutting devices for hard materials like tiles and stone slabs struggle to produce perfectly straight cuts due to their lightweight design and lack of lateral guidance, leading to uncontrolled cuts and potential damage from vibrations when attempting to support the tool on the material surface.
Innovation Solution
A support accessory with a rotating bearing and support ring is integrated onto the motor shaft of the cutting device, allowing the tool to be used with the support ring resting on the material surface, providing stability and guidance for the cutting disc without interfering with the tool's rotation or causing scratches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the cutting device is made lightweight for portability, then operator fatigue is reduced and portability is improved, but control precision and cutting straightness deteriorate due to insufficient weight to counteract blade stresses
Solution Approach 1:
A support ring is introduced as an intermediary component between the cutting device and the material surface. This support ring provides the necessary stability and guidance for straight cuts without requiring the entire device to be heavier. The support ring acts as a mediator that enables precise control while maintaining the lightweight design of the main cutting device.
2Ease of operation
If the device is designed for freehand operation without support, then portability and ease of use are maintained, but cutting control and straightness deteriorate due to lack of lateral guidance
Solution Approach 1:
The support ring is designed to rotate freely around the motor shaft, allowing it to adapt dynamically to the cutting process. This rotational freedom enables the support ring to provide guidance and stability during freehand operation without constraining the operator's movement. The dynamic design maintains ease of operation while improving cutting control.
3Manufacturing precision
If a support frame is added to guide the cutting blade, then cutting straightness is improved, but the frame vibrations cause micro-scratches on the finished surface
Solution Approach 1:
The harmful vibrational support function is extracted from the main cutting device and separated into an independent support ring component. This support ring is specifically designed with low-friction or anti-abrasion material finish to prevent surface scratches while providing the necessary guidance. By separating the support function, the device achieves cutting straightness without transmitting harmful vibrations to the material surface.
4Manufacturing precision
If the support ring is fixed to prevent rotation, then guidance stability is improved, but friction causes surface damage and operator difficulty
Solution Approach 1:
The support ring is designed to rotate freely around the motor shaft, allowing it to adapt dynamically to the cutting process. This rotational freedom enables the support ring to provide guidance and stability during freehand operation without constraining the operator's movement. The dynamic design maintains ease of operation while improving cutting control.
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 the operator to make controlled, straight cuts by allowing the support ring to remain stationary while the cutting disc rotates, reducing operator effort and preventing surface damage with a low-friction or anti-abrasion material finish.
Implementation Method 1
The bearing 4 is dimensioned in such a way that it can be fit centred on the shaft 1a... the support ring 5 integral with the outer ring of the bearing 4... The support ring 5 has an external radius which is smaller than the radius of the cutting disc 2... The support ring 5 can be used as a support means on the surface of the material to be cut... the support ring 5 remains idle with respect to the rotation of the cutting disc 2
Data Source
Figure 1
Figure 2~3
Figure 4A
AI summary
It is disclosed an accessory equipment for a motorized handheld cutting device, comprising a hub to be coupled to a motor body of said device, coaxially to a motor shaft (la), and a supporting surface suitable for resting on a surface of a material to be cut, wherein said hub (6, 60) is integral with an inner ring of a rotating bearing (4) having a central hole adapted to be fitted coaxially on said motor shaft (la) of said motorized cutting device, and in that said supporting surface is constituted by a support ring (5) which is integral in rotation to an outer ring of said rotating bearing (4).