Gear-Driven Shearing Mechanism for Labor-Saving Garden Shears
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Solution Overview
Problem
Traditional garden shears lack labor-saving features and have complex connection structures that complicate production and assembly.
Innovation Solution
A shearing mechanism with a gear-tooth matching transmission structure, including a mounting bracket, first and second shearing assemblies, and a linkage mechanism, allowing for synchronized rotation of actuating arms and shearing portions, and a sliding member for linkage between shearing portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a connecting rod mechanism or connecting rod-sliding block mechanism is used to achieve labor-saving effect, then labor-saving effect is improved, but structure complexity increases and production assembly becomes complicated
Solution Approach 1:
The shearing mechanism is divided into two independent shearing assemblies (first and second shearing assemblies), each with its own actuating arm and shearing portion. This segmentation allows each assembly to function independently while maintaining overall coordination, reducing the complexity of the connection mechanism compared to traditional connecting rod systems.
Solution Approach 2:
A linkage mechanism serves as an intermediary between the first and second actuating arms, enabling synchronized reverse rotation without requiring complex connecting rod mechanisms. The linkage mechanism mediates the motion transmission, simplifying the overall structure while achieving the desired coordination effect.
2Ease of operation
If a complex connecting rod mechanism is used, then labor-saving effect is achieved, but manufacturing and assembly complexity increases
Solution Approach 1:
By segmenting the shearing mechanism into modular assemblies with standardized components (actuating arms, shearing portions, gears), the design becomes more manufacturable and easier to assemble. Each module can be produced independently and then assembled, reducing overall manufacturing complexity.
Solution Approach 2:
The invention changes the fundamental parameter of motion transmission from connecting rod mechanisms to gear-tooth matching. This parameter change enables a different approach to achieving synchronized motion, one that is simpler to manufacture and assemble while maintaining the labor-saving effect.
3Device complexity
If traditional direct connection of shearing portion to handle is used, then structure simplicity is maintained, but labor-saving effect is lost
Solution Approach 1:
The linkage mechanism acts as an intermediary between the two shearing assemblies, providing coordinated motion control while maintaining structural simplicity. This intermediary enables the labor-saving effect without requiring the complexity of traditional connecting rod mechanisms.
Solution Approach 2:
The invention merges the functions of two shearing assemblies into a coordinated system, where both assemblies work together through the linkage mechanism. This combining approach achieves enhanced labor-saving effect while maintaining relative structural simplicity through the unified design.
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 mechanism simplifies manufacturing, saves labor, and allows for compact design while enhancing shearing control, reducing shearing deviations and assembly complexity.
Implementation Method 1
the first actuating arm is provided with a first driving gear, and the first shearing portion is provided with a first driven gear engaged with the first driving gear
Implementation Method 2
the second actuating arm is provided with a second driving gear, and the second shearing portion is provided with a second driven gear engaged with the second driving gear
Implementation Method 3
the linkage mechanism may include a sliding member slidably arranged on the mounting bracket, and the first shearing portion and the second shearing portion are respectively provided with a sliding structure matched with the sliding member in a sliding manner
Data Source
AI summary
A shearing mechanism may include a mounting bracket, a first shearing assembly, a second shearing assembly and a linkage mechanism. The first shearing assembly may include a first actuating arm rotatably arranged on the mounting bracket and a first shearing portion rotatably arranged on the mounting bracket. The first actuating arm is provided with a first driving gear, and the first shearing portion is provided with a first driven gear engaged with the first driving gear. The second shearing assembly may include a second actuating arm rotatably arranged on the mounting bracket and a second shearing portion rotatably arranged on the mounting bracket. The second actuating arm is provided with a second driving gear, and the second shearing portion is provided with a second driven gear engaged with the second driving gear. A garden shear may include the shearing mechanism.