Gardening Shears Effort-Saving Axle Mechanism
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Solution Overview
Problem
Conventional gardening shears require repeated and effort-consuming operation to prune larger branches due to the need for frequent opening and closing of handles, making the process time-consuming and labor-intensive.
Innovation Solution
The gardening shears feature an axle assembly that moves along an elongated groove on the shank, altering the torque applied to the handles, allowing for easier operation by increasing torque when cutting larger branches, thus reducing user effort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional gardening shears are used to prune larger branches, then the cutting function is achieved, but the user has to repeatedly open and close the handles many times, making it effort-consuming and time-consuming
Solution Approach 1:
The axle assembly is designed to move dynamically along the elongated groove of the shank during the cutting process. This dynamic positioning changes the torque produced by the force applied on the handles, allowing the shears to adapt to different cutting stages and reduce the number of repeated operations needed for larger branches
Solution Approach 2:
The invention changes the torque parameter during operation by moving the axle assembly along the elongated groove. This parameter change allows the shears to optimize the mechanical advantage at different stages of cutting, reducing user effort and the number of operations required
2Productivity
If the handles are opened and closed repeatedly to cut larger branches, then the cutting depth increases, but the user effort and time consumption increase significantly
Solution Approach 1:
The movable axle assembly creates a dynamic mechanical advantage system that increases cutting efficiency. As the axle moves along the groove, it optimizes the torque distribution, allowing deeper cuts to be achieved with fewer handle operations and reduced user effort
Solution Approach 2:
The elongated groove is divided into different positions that correspond to different cutting stages. The axle assembly moves through these segmented positions, with each position providing optimized torque for that specific stage of the cutting process, thereby improving overall productivity
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 design enables users to apply smaller forces when cutting larger branches, significantly reducing effort and time required for pruning, enhancing convenience and efficiency.
Implementation Method 1
the axle assembly is moved along the elongated groove of the shank, and the first shear blade and the second shear blade are opened or closed accordingly
Data Source
AI summary
A gardening shears includes a shank having an elongated groove, a first handle connected to the bottom end of the shank, a first shear blade having a first blade portion and a first shank portion with top end connected to the bottom end of the first blade portion, a second handle connected to the bottom end of the first shank portion, and a second shear blade having a second blade portion and a second shank portion with top end connected to the bottom end of the second blade portion. The first shank portion has an axle assembly located in the elongated groove. The second shank portion is pivotably connected with the first shank portion and the shank by first and second pivot members respectively. When the handles are opened or closed, the axle assembly moves along the elongated groove to change the torque on the handles to save effort.