Abrasive Disc Cup with Radial Dust Channels
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing abrasive discs for electric tools suffer from dust clogging, which reduces the abrasive material's effectiveness due to dust collection in the cup-shaped portion and subsequent deposition on the abrasive surface during operation.
Innovation Solution
The disc features a cup-shaped portion with strategically placed openings and discharge channels that redirect dust away from the abrasive surface, combined with a threaded chuck shaft for secure attachment without a locknut, optimizing dust expulsion and enhancing mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a cup-shaped portion is provided to receive the locknut, then the locknut does not extend beyond the abrasive surface, but dust collected in the cup-shaped portion strikes the abrasive material and deposits thereon, reducing its functionality
Solution Approach 1:
The cup-shaped portion is segmented with multiple openings distributed on its lateral wall, dividing the internal space into multiple discharge zones. This segmentation allows dust to be expelled through multiple pathways rather than accumulating and striking the abrasive material, resolving the contradiction between providing a locknut receptacle and preventing dust deposition.
Solution Approach 2:
The openings in the lateral wall of the cup-shaped portion act as intermediary channels that redirect dust away from the abrasive material. Instead of dust directly striking the abrasive surface, the openings serve as intermediate pathways that channel dust outward, preventing the harmful deposition while maintaining the cup's structural function.
2Productivity
If openings are provided in the lateral wall of the cup-shaped portion, then dust is discharged efficiently, but the structural integrity and rigidity of the cup-shaped portion may be compromised
Solution Approach 1:
The openings are strategically positioned on the lateral wall of the cup-shaped portion, with different sizes and distributions according to local dust accumulation patterns. This local quality approach allows optimal dust discharge in specific zones while maintaining structural integrity in other areas, resolving the contradiction between dust discharge efficiency and structural strength.
Solution Approach 2:
The cup-shaped portion is constructed from composite material comprising a rigid base material with integrated reinforcing elements. This composite structure provides the necessary structural integrity to maintain cup shape and rigidity even with multiple openings present, allowing both dust discharge functionality and structural strength to coexist.
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
This design ensures efficient dust removal, maintaining the abrasive material's functionality, improving operational efficiency, and providing cooling airflow while increasing the tool's rigidity and preventing dust from clogging the abrasive surface.
Implementation Method 1
During rotation of the disc a part of the dust produced strikes the cup-shaped portion and collects in the concavity thereof. By effect of the rotation of the disc, the powder collected in the cup-shaped portion is expelled therefrom in a radial direction towards the external periphery of the disc.
Data Source
Figure 1~2
Figure 3~4
AI summary
A disc for electric tools for supporting abrasive material, comprising an annular portion (2) destined to retainingly receive abrasive material, a cup-shaped portion (6) which develops internally of the annular portion (2) and comprises a bottom wall (7) affording a central hole (9) for passage of a shaft of an electric tool chuck, and a lateral wall (8) connecting the bottom wall (7) and the annular portion (2). The cup-shaped portion (6) comprises a plurality of openings (10) arranged on the lateral wall (8) and a plurality of walls (11) which develop between the hole (9) and the openings to define a plurality of discharge channels (12) for the accumulated dust in the cup-shaped portion (6) during use of the disc (1).