Grinder Blade Proximal Locking Hub for Concrete Cutting
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Solution Overview
Problem
Existing flush cut grinder blades for concrete become inefficient and pose safety risks due to wear and tear of fasteners, leading to potential breakage and injury.
Innovation Solution
A secure grinder blade with a tapered tool-side locking hub and non-countersunk machine screws, where the fasteners are disposed proximally to the tool-side plane, ensuring secure locking and reducing the risk of fastener wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fasteners are disposed distally to the tool-side plane (conventional design), then the blade can be secured to the grinder, but the fasteners become exposed to grinding operations and suffer from wear and tear, leading to inefficiency and safety risks
Solution Approach 1:
The patent inverts the conventional fastener placement by moving fasteners from the distal side to the proximal side of the tool-side plane. This inversion protects fasteners from exposure to grinding operations, eliminating wear and tear while maintaining secure blade attachment to the grinder spindle.
Solution Approach 2:
The patent introduces a threaded flange as an intermediary component between the blade and fasteners. The flange is secured to the blade body with fasteners disposed proximally to the tool-side plane, acting as a mediator that allows fastener placement in a protected position while still achieving secure blade attachment to the grinder.
2Reliability
If fasteners are disposed proximally to the tool-side plane, then fastener wear is reduced and reliability is improved, but the device complexity increases due to additional structural components
Solution Approach 1:
The patent merges the locking hub and blade assembly into a unified structure where the threaded flange serves dual purposes: securing the locking hub to the blade body while also providing the mounting interface for fasteners. This integration reduces overall device complexity despite the innovative fastener placement.
Solution Approach 2:
The threaded flange performs multiple functions: it secures the locking hub to the blade body, provides a mounting surface for fasteners, and enables attachment to the grinder spindle. This multi-functionality reduces the need for separate components, offsetting the complexity introduced by proximal fastener placement.
3Productivity
If conventional fastening methods are used, then the blade can be attached to the grinder, but continuous use leads to fastener wear, blade inefficiency, and potential breakage
Solution Approach 1:
The patent implements preliminary protection by positioning fasteners proximally to the tool-side plane before grinding operations begin. This preliminary arrangement prevents fastener exposure to wear-inducing conditions, ensuring consistent blade security and grinding efficiency throughout the blade's service life without premature failure.
Data Source
AI summary
An apparatus may include a grinder blade for flush cutting concrete, the grinder blade comprising: a distal side that defines a flush cutting plane and a proximal side opposite the distal side, and a locking hub receiver section unitarily formed from the grinder blade at a center portion and extending from the grinder blade a proximal direction to receive a locking hub with a plurality of fasteners disposed proximally to the grinder blade to secure the locking hub against the grinder blade.