Sanding Frame with Rotational Coupling for Quick Element Replacement
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Solution Overview
Problem
Existing devices for sanding concrete and stone floor areas are laborious to maintain, as sanding elements require frequent replacement and are not easily interchangeable, and existing solutions for power trowels are either unsuitable for large areas or prone to wear due to tiltable connections.
Innovation Solution
A device with a subframe and sanding frame that allows for simple replacement of sanding elements by vertically raising the subframe, decoupling it from the sanding frame, and optionally coupling with a power trowel, using a form-fitting adapter and receiver for rotational coupling without interlocking elements, enabling easy handling and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sanding elements are attached to a fixed sanding frame, then the sanding structure is stable, but the sanding elements become laborious to replace
Solution Approach 1:
The device is divided into a sanding frame and a subframe that can be separated from each other. The sanding elements are attached to the sanding frame, which can be detached from the subframe. This segmentation allows the sanding frame with elements to be easily removed and replaced without replacing the entire assembly, resolving the contradiction between structural stability and ease of replacement.
Solution Approach 2:
The connection between the sanding frame and subframe is made dynamic rather than fixed. The sanding frame is rotatably coupled to the subframe and can be freely supported to allow vertical raising and decoupling. This dynamic connection enables easy replacement of sanding elements while maintaining operational stability during use.
2Ease of operation
If a tiltable detachable connection is used for tool coupling, then the tool has high manoeuvrability, but the connection becomes weaker and more susceptible to wear
Solution Approach 1:
Instead of using a tiltable connection that compromises strength, the invention inverts the approach by using a rotational coupling mechanism where the sanding frame rotates on the subframe. The adapter and receiver provide a form-fitting connection that maintains strength while allowing necessary movement. This inverted approach prioritizes connection reliability while achieving manoeuvrability through rotation rather than tilting.
Solution Approach 2:
An adapter and receiver mechanism serves as an intermediary between the subframe and sanding frame. This intermediary provides a form-fitting rotational coupling that maintains strong connections while enabling the sanding frame to rotate and be freely supported. The intermediary component resolves the contradiction by providing both strength and mobility through its specific mechanical design.
3Manufacturing precision
If sanding elements are replaced frequently, then the sanding quality is maintained, but the maintenance time and labor increase
Solution Approach 1:
The sanding frame is segmented from the subframe, allowing the sanding frame with attached elements to be removed as a single unit. This segmentation enables quick replacement of worn sanding elements without disassembling the entire device or replacing elements individually, thus maintaining sanding quality while minimizing maintenance time.
Solution Approach 2:
The sanding frame is pre-assembled with sanding elements attached to holders on the frame itself. This preliminary assembly means that when elements need replacement, the entire pre-assembled sanding frame can be quickly swapped out and a fresh pre-assembled frame installed, reducing maintenance time compared to replacing elements one by one on-site.
Data Source
Figure 1~3
Figure 4
Figure 5A~5B
AI summary
The present invention relates to a device (14) for sanding floor areas, the device comprising a frame, a steering, a motor which is provided to said frame, a subframe (13) rotatably coupled with said motor, said subframe being centrally provided with an adapter (7) along the lower side, a sanding frame (1), said sanding frame being centrally provided with a receiver (2) along the upper side, said receiver receiving said adapter, and at least one holder (5) for sanding elements, said holder being provided along the lower side of said sanding frame and being suitable for the attachment of sanding elements (15). In particular, the subframe is freely supported by the sanding frame, via said adapter and receiver, said adapter and receiver being rotationally coupled. In other aspects, the invention relates to a sanding frame, a sanding element and a method for sanding floor areas, as well as a floor area obtained by application of said method.