Trimmer Head Elastic Coupling for Blade Replacement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing trimmer heads, particularly those with straight cutting blades, are inconvenient to mount, prone to damage, and have high product breakage rates, leading to decreased efficiency and safety concerns, while string trimmer heads are complex to replace and lack durability.
Innovation Solution
A trimmer head design featuring a rotary shaft with an upper and lower case connected by elastic media, allowing easy separation and replacement of cutting blades, and incorporating shock-absorbing members to prevent damage from impacts, while minimizing friction and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If straight cutting blades are used, then workability is improved, but mounting process becomes inconvenient and time-consuming
Solution Approach 1:
The cutting blade is divided into multiple segments that can be independently mounted and replaced. Each segment can be attached to the rotating shaft separately, simplifying the mounting process while maintaining the straight blade configuration for good workability.
Solution Approach 2:
The cutting blade design incorporates dynamic mounting mechanisms that allow for quick attachment and detachment during operation. The blade can be dynamically replaced without complex tools or procedures, resolving the contradiction between maintaining straight blade workability and simplifying the mounting process.
2Ease of manufacture
If straight cutting blades are used, then workability is improved, but the blades are heavy and easily damaged
Solution Approach 1:
The straight cutting blade is segmented into multiple smaller sections connected by flexible joints. This segmentation reduces the weight of each individual blade segment while maintaining the overall straight configuration for effective cutting. The segmented design also increases flexibility and resistance to damage from impacts.
Solution Approach 2:
The cutting blade incorporates composite materials that provide high strength-to-weight ratio. The blade uses lightweight yet durable materials such as reinforced polymers or carbon-fiber composites, maintaining the straight shape for workability while significantly improving durability and reducing weight.
3Object-affected harmful factors
If string is used as cutting blade, then safety is improved, but replacement procedure becomes complex
Solution Approach 1:
The string cutting blade is organized into modular segments that can be independently replaced. Each segment is pre-cut to standard lengths and can be quickly inserted into the trimmer head without complex tools, simplifying the replacement procedure while maintaining the safety advantages of string-based cutting.
Solution Approach 2:
The string blade system incorporates self-service replacement features such as automatic feed mechanisms and easy-access loading ports. Users can quickly reload string segments without complex procedures, maintaining safety while dramatically simplifying the replacement process through intuitive, tool-free design.
4Ease of operation
If elastic media are used to connect upper and lower cases, then blade replacement is simplified, but device complexity increases
Solution Approach 1:
Elastic media serve as an intermediary mechanism between the upper and lower cases, providing a simple yet effective means to hold and release cutting blades during replacement. The elastic elements act as mediators that automatically secure blades in place and facilitate easy removal without complex locking mechanisms, balancing operational simplicity with structural considerations.
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
The design enhances operational efficiency, durability, and safety by simplifying blade replacement, reducing impact damage, and minimizing friction, resulting in increased working speed and reduced product wear.
Implementation Method 1
the upper case and the lower case are further connected to each other by a plurality of elastic media and are spaced apart by the tension of the elastic medium when the upper case and the lower case are separated from each other
Implementation Method 2
incorporating shock-absorbing members to prevent damage from impacts
Data Source
AI summary
A trimmer head having an upper case having a fastening portion formed with an upper fastening hole for coupling the rotating shaft to a center of the upper case; a lower case formed with a lower fastening hole at its center and the lower case being coupled to the upper case; a body portion positioned in a cavity between the upper case and the lower case; and a plurality of cutting means coupled to the body portion so as to be rotatable at one end thereof, wherein the upper case and the lower case are further connected to each other by a plurality of elastic media and are spaced apart by the tension of the elastic medium when the upper case and the lower case are separated from each other.