Cutting Tool Blade Holder With Rotary Lever Locking Mechanism
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Solution Overview
Problem
Existing cutting tools with non-segmented blades require time-consuming replacement processes that necessitate the use of additional tools, such as screwdrivers, making the process cumbersome and inefficient.
Innovation Solution
A cutting tool design featuring a housing with a movable locking member and a rotary lever that allows for easy blade exchange without tools, where the locking member is pivotally mounted and can be actuated to lock or release the blade, ensuring secure holding and easy operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a non-segmented blade is used in a cutting tool, then the blade structure is simpler and more robust, but the blade replacement process becomes time-consuming and requires additional tools
Solution Approach 1:
The blade is divided into a blade body and a separate blade holder that can be independently replaced. The blade holder contains the cutting edge and can be quickly exchanged without replacing the entire blade assembly, thus reducing replacement time while maintaining structural integrity through the holder design.
Solution Approach 2:
The cutting edge is extracted as a separate replaceable component (blade holder) from the main blade assembly. This allows the cutting edge to be replaced independently without affecting the blade body or requiring additional tools, significantly reducing replacement time while maintaining the robustness of the overall structure.
2Reliability
If a secure locking mechanism is used to hold the blade, then the blade is held firmly during use, but the blade replacement process becomes more complex and time-consuming
Solution Approach 1:
The locking mechanism is designed to automatically engage and disengage without requiring additional tools or complex operations. The blade holder features self-locking elements that secure the blade firmly during use but can be easily released by simple manual manipulation, thus maintaining high reliability while minimizing complexity.
Solution Approach 2:
The locking mechanism is localized to specific engagement points on the blade holder rather than requiring a complex overall locking system. This allows the blade to be securely held at critical positions while maintaining simplicity in the overall mechanism design, enabling quick replacement without compromising holding security.
3Ease of operation
If a tool-free blade replacement system is implemented, then the replacement process is simplified and faster, but the blade holding security during use may be compromised
Solution Approach 1:
The blade holder incorporates self-locking features that automatically secure the blade without requiring tools during replacement. The same self-locking mechanism ensures firm holding during use through positive engagement, thus achieving both ease of operation and reliable blade security without compromising either aspect.
Solution Approach 2:
The blade holder design uses asymmetric locking surfaces that provide strong mechanical engagement during use but allow easy one-way release during replacement. This asymmetric geometry enables tool-free replacement while maintaining secure holding, as the locking direction provides stability during cutting while the release direction allows simple manual operation.
Data Source
Figure 1
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AI summary
The cutting tool (1) has a housing (2), a changing-blade (8), which is arranged on a holding portion (6) of the housing. A blocking element is provided for blocking the blade on the housing. The housing has a first positive locking element and the blocking element has a second positive locking element, which are locked together with the blade in a given position on the housing. Independent claims are included for the following: (1) a changing-blade with a clink head; and (2) a method for changing a changing-blade of a cutting tool.