Grinding Head Driver Interface for Replaceable Abrasive Pads

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Solution Overview

Problem

Existing grinding heads for power tools, particularly those used for finishing and polishing concrete floors, face issues with wear and tear, leading to unnecessary waste and high maintenance costs due to the need for replacing entire driver plate assemblies or hook-and-loop fasteners that deteriorate over time.

Innovation Solution

A driver interface for a grinding head assembly that includes a center plate with mounting channels and pads, a clamping plate system, and a flexible disk attachment mechanism using touch fasteners, allowing for quick and efficient replacement of abrasive surfaces without disassembly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If hook-and-loop fasteners are used for removable attachment of grinding disks, then individual grinding disks can be replaced without replacing the entire driver plate assembly, but the hook-and-loop fasteners themselves wear out after prolonged usage requiring replacement of the driver plate assembly

Engineering Contradiction:
Improveease of disk replacementVSAvoidfastener durability
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The driver plate assembly is segmented into multiple functional components: a reusable driver plate body, replaceable mounting pads with fresh hook-and-loop fasteners, and replaceable grinding disks. This segmentation allows the mounting pads to be replaced independently when their fasteners wear out, extending the overall system life without replacing the entire driver plate assembly.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The mounting pads are designed as consumable components that can be discarded and replaced when their hook-and-loop fasteners wear out. The reusable driver plate body and disk locators are recovered and retained for continued use, minimizing waste and reducing the frequency of complete assembly replacements.

Inventive Principle:
Principle #34Discarding and recovering

2Reliability

If the entire driver plate assembly is replaced after prolonged wear, then all worn components are discarded, but this creates unnecessary waste and requires disassembly and reassembly of the grinding head

Engineering Contradiction:
Improveoverall assembly durabilityVSAvoidmaterial waste
Core Design Contradiction:
ReliabilityVSLoss of substance

Solution Approach 1:

The driver plate assembly is divided into permanent components (driver plate body, disk locators) and consumable components (mounting pads with fasteners). This segmentation enables selective replacement of only the worn consumable parts while retaining the durable permanent components, eliminating unnecessary material waste.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The mounting pads are designed as disposable consumables that are discarded when worn, while the expensive driver plate body and disk locators are recovered and reused. This approach minimizes material waste and reduces the frequency of complete assembly replacements.

Inventive Principle:
Principle #34Discarding and recovering

3Reliability

If the entire driver plate assembly is replaced after prolonged wear, then all components are discarded, but this requires disassembly and reassembly of the grinding head

Engineering Contradiction:
Improveassembly durabilityVSAvoiddowntime for replacement
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The driver plate assembly is segmented into modular components with mounting pads that can be quickly detached and replaced without disassembling the entire grinding head. This modular design significantly reduces replacement time compared to replacing the entire driver plate assembly.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The mounting pads are pre-equipped with hook-and-loop fasteners that enable quick attachment and detachment of grinding disks. This preliminary preparation of the mounting system allows for rapid component replacement without requiring time-consuming disassembly and reassembly procedures.

Inventive Principle:
Principle #10Preliminary action

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 easy and cost-effective replacement of abrasive surfaces, minimizing downtime and reducing waste by allowing individual components to be swapped out as needed, thus extending the life of the grinding head.

Implementation Method 1

The flexible grinding disk attachment means has an anchoring portion and a grinding disk receiving portion, configured so that the grinding disk attachment means wraps around the outer edge of the center plate

Methodology Applied
Scientific EffectElasticity: Elasticity

Implementation Method 2

a means for removably fastening the upper clamping plate and the lower clamping plate to the center plate

Methodology Applied
Scientific EffectMechanical Force: Mechanical Force

Data Source

PatentUS12397391B2Grinding head assembly and driver interface
Publication Date: 2025.08.26 MULTIQUIP INC
  • US12397391B2 patent drawing
  • US12397391B2 patent drawing
  • US12397391B2 patent drawing

AI summary

A driver interface for a grinding head has a center plate defining a top surface, a bottom surface, and an outer edge. An upper plate is engaged to a mounting channel formed in the top surface and a lower plate is engaged to the bottom surface. The center plate has mounting pads formed on the bottom surface, each mounting pad having a raised edge. The lower plate includes disk locating apertures that align around the mounting pads. Disk attachers are clamped to the center plate between the upper and lower plates. Each disk attacher defines a disk receiving portion that aligns with one of the mounting pads and is located within one of the disk locating apertures.