Quick-Release Collet Mechanism for Tool Blade Replacement
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Solution Overview
Problem
The inefficiency of replacing saw blades and sand discs in multi-function tools due to the need to remove and re-tighten screws, and the risk of losing hexagonal wrenches, which hinders tool functionality.
Innovation Solution
A quick exchange structure featuring an elastic collet with a locking shaft that moves axially within the collet, allowing for the saw blade or sand disc to be clamped and released by rotating a rotary knob, eliminating the need for screws and reducing the risk of lost wrenches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If screws and hexagonal wrenches are used to fix the saw blade, then the saw blade can be securely fixed, but the replacement process becomes time-consuming and the wrench may be lost
Solution Approach 1:
The patent extracts the hexagonal wrench from the system by replacing the screw-fixing mechanism with a self-contained quick-release collar mechanism. The collar integrates the locking function previously requiring an external wrench, eliminating the tool and reducing replacement time while maintaining secure fixing through the collar's interference fit design with the output shaft's hexagonal section.
Solution Approach 2:
The patent segments the fixing mechanism into modular components: the output shaft with hexagonal section, the collar with internal hexagonal opening, and the quick-release mechanism. This segmentation allows each component to perform its specific function efficiently and enables rapid assembly and disassembly without requiring multiple tools or complex operations.
2Reliability
If screws and hexagonal wrenches are used to fix the saw blade, then the saw blade can be securely fixed, but the structure becomes more complex requiring additional parts
Solution Approach 1:
The patent merges the locking function, the fixing mechanism, and the release function into a single integrated collar component. The collar combines the hexagonal opening for engagement with the output shaft, the quick-release mechanism, and the positioning features into one part, reducing the total number of components while maintaining secure fixing capability.
Solution Approach 2:
The collar is designed as a multi-functional component that simultaneously provides: (1) secure engagement with the output shaft through its internal hexagonal opening, (2) positioning of the saw blade through its structure, (3) quick release through the integrated mechanism, and (4) prevention of radial displacement. This universality reduces the need for separate specialized components.
3Reliability
If traditional screw fixing is used, then the saw blade can be firmly attached, but the operation becomes difficult and less convenient
Solution Approach 1:
The quick-release collar mechanism is designed to be self-operating without requiring external tools. The user can directly manipulate the collar's release mechanism with hand operation, and the spring-loaded or cam-based quick-release system automatically performs the loosening and release actions, making the operation convenient while maintaining firm attachment during use.
Solution Approach 2:
The collar incorporates dynamic elements such as spring-loaded locking features or cam mechanisms that automatically adjust during operation. The mechanism transitions smoothly between the locked state (firm attachment) and the released state (easy removal) through dynamic motion, improving ease of operation while maintaining reliability in both states.
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 solution significantly enhances the efficiency of saw blade and sand disc replacement, ensuring easy operation and maintaining tool functionality without the need for screws or hexagonal wrenches, resulting in a compact and efficient multi-function tool design.
Implementation Method 1
an elastic collet able to do axial movement is arranged. In the collet a locking shaft is arranged, and the locking shaft is driven to move axially within the elastic collet by an elastic assembly to realize the opening and closing of the elastic collet
Implementation Method 2
by rotating rotary knob arranged on the head of the structure, the axial sliding movement of the output shaft assembly and the locking assembly is controlled to release or clamp the saw blade
Data Source
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AI summary
A multifunctional tool and a rapid replacement structure thereof, comprise an output shaft assembly. An elastic chuck (16) capable of moving axially is arranged in the output shaft assembly. A locking shaft (10) is arranged in the elastic chuck (16) and driven by an elastic assembly to move axially in the elastic chuck (16), thus expansion opening and closing of the elastic chuck (16) are achieved. The present invention controls the axial sliding of the output shaft assembly and the locking shaft assembly by rotating a knob at the head of the machine, thus the saw web is controlled to be loosened or clamped and the rapid replacement function is achieved.