Saw Blade Quick-Change Locking Structure for Multi-Diameter Blades
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing saw blade quick-change structures are complex and limited to specific diameters, making them unsuitable for a wide range of saw blades.
Innovation Solution
A saw blade quick-change structure for electric tools featuring a locking mechanism with a movable rod, locking rod, collet chuck, locking block, stop collar, and return spring, allowing for easy installation and removal of saw blades through a quick-change buckle and eccentric block mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a quick-change structure is designed to enable fast blade replacement, then the blade change time is reduced, but the structure becomes complex and limited to specific blade diameters
Solution Approach 1:
The quick-change head is divided into independent functional modules: an actuating mechanism (button and cam) for rapid release, a locking mechanism (spring and locking block) for secure fixation, and a universal mounting interface. This segmentation allows each module to perform its specific function efficiently while keeping the overall structure manageable and adaptable to different blade sizes.
Solution Approach 2:
The quick-change head incorporates a universal mounting interface with a standardized locking mechanism that can accommodate multiple blade diameters. The spring-loaded locking block and cam actuating system provide a multi-functional solution that works with various blade sizes, eliminating the need for diameter-specific quick-change mechanisms and reducing overall device complexity.
2Adaptability or versatility
If a quick-change structure uses a fixed-diameter collet chuck, then the structure is simplified, but it cannot accommodate saw blades with different inner hole diameters
Solution Approach 1:
The locking mechanism uses a dynamic spring-loaded locking block that can adapt its position and clamping force. The spring allows the locking block to move radially, enabling it to engage with the mounting interface regardless of the specific blade diameter, providing versatility without requiring multiple fixed-diameter components.
Solution Approach 2:
The actuating mechanism changes the operational state of the locking mechanism through a simple button press, which triggers the cam to rotate and release the locking block. This parameter change (from locked to unlocked state) allows rapid adaptation to different blade sizes without manually adjusting the mechanism, maintaining simplicity while achieving versatility.
3Ease of operation
If traditional hexagon screws and pressing plates are used to fix saw blades, then the structure is simple and universal, but the assembly and disassembly process is strenuous and time-consuming
Solution Approach 1:
The traditional mechanical fastening system (hexagon screws and pressing plates requiring wrenches) is replaced with a spring-loaded locking block actuated by a button and cam mechanism. This substitution eliminates the need for external tools and manual tightening/loosening operations, making blade installation and removal simple and rapid.
Solution Approach 2:
The spring-loaded locking mechanism is self-actuating through the button press. When the button is pressed, the cam rotates and automatically releases the locking block, allowing the blade to be removed without external force or tools. Similarly, inserting the blade causes the locking block to engage automatically, providing self-service functionality that greatly improves ease of operation and reduces time loss.
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
Enables fast and simple replacement of saw blades, adaptable to various diameters, reducing the need for special blades and saving space, while maintaining secure fixation.
Implementation Method 1
a return spring contacting the locking block and used for pushing the locking block upward
Implementation Method 2
an inclined slope is formed between the upper portion with the large inner diameter and the lower portion with the small inner diameter of the locking block, an outer side of the clamping portion of the collet chuck is in close contact with the inclined slope
Implementation Method 3
the quick-change buckle comprises a quick-change trigger snap and an eccentric block, the quick-change trigger snap and the eccentric block are fixedly installed, and the eccentric block is hinged to the head shell
Data Source
AI summary
Disclosed are a saw blade quick-change structure for electric tools, and a saw blade quick-change method. The saw blade quick-change structure for electric tools comprises a locking mechanism, a head shell, a tool rest and a quick-change buckle. The locking mechanism is installed in the head shell. The tool rest is installed at the bottom of the head shell. The quick-change buckle is hinged to the head shell. The locking mechanism comprises a movable rod, a locking rod, a collet chuck, a locking block, a stop collar and a return spring. The collet chuck is located below the movable rod. The locking rod is clamped by the collet chuck. The locking block and the stop collar open or close the collar chuck. The return device returns the locking block. The saw blade is assembled and disassembled through the cooperation of the collet chuck and the locking block.