Mower Wire Box Take-Up Structure With Damping Ratchet
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Solution Overview
Problem
Existing mower wire box take-up structures face challenges in maintaining optimal cutting line length due to varying wear rates of the cutting line, leading to inefficient automatic casting-out and reduced durability, resulting in operational difficulties for operators.
Innovation Solution
A mower wire box with a take-up structure featuring a wire box, elastic ribs, a ratchet assembly, and a dual casting-out mechanism that utilizes centrifugal force and damping to ensure stable casting-out, combining automatic and manual modes to adapt to changing cutting line lengths and wear conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple automatic casting-out structure based on ratchet mechanism and damping force is used, then the device complexity is reduced, but the reliability of casting-out operation deteriorates because it cannot adapt to varying cutting line wear conditions
Solution Approach 1:
The patent applies dynamics by making the damping force adjustable rather than fixed. The damping component includes a damping plate with adjustable damping holes that can be repositioned to change the damping effect. This allows the system to adapt to varying cutting line wear conditions and maintain reliable casting-out operation across different operational states, resolving the contradiction between simple structure and reliable performance.
2Device complexity
If the damping force is fixed in the automatic casting-out structure, then the device complexity is reduced, but the adaptability to varying cutting line wear rates deteriorates
Solution Approach 1:
The damping structure is designed with adjustable damping holes in the damping plate that can be repositioned along radial slots. This dynamic adjustment capability allows the damping force to be optimized for different cutting line wear rates without increasing overall device complexity, thereby improving adaptability to varying operational conditions.
Solution Approach 2:
The patent changes the parameter of damping force by providing multiple damping hole configurations. By adjusting the position and number of damping holes, the damping characteristic can be modified to match different cutting line wear rates, enabling the system to adapt to varying operational conditions while maintaining a relatively simple overall structure.
3Productivity
If automatic casting-out is implemented without impact reduction measures, then the productivity is improved by reducing manual intervention, but the durability of the casting-out structure deteriorates due to large impact forces
Solution Approach 1:
The patent implements beforehand cushioning by incorporating a damping component that absorbs impact forces during the casting-out process. The damping holes in the damping plate create resistance to the damping plate's movement, cushioning the impact when the cutting line is cast out. This protects the casting-out structure from large impact forces while maintaining automatic operation efficiency, thereby improving both productivity and durability.
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 solution provides stable and efficient cutting line extension, reducing wear and impact forces, thereby prolonging the service life of the automatic casting-out device and improving operational stability and practicality by offering multiple casting-out methods.
Implementation Method 1
The elastic ribs are spread out by the centrifugal force, and the first rib and the second rib frictionally cooperate to form damping to achieve stable casting-out
Implementation Method 2
the first rib and the second rib frictionally cooperate to form damping
Data Source
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AI summary
The present invention discloses a take-up structure of a mower wire box, which comprises a wire box and a wire reel arranged in the wire box. The wire box is provided inside with a supporting portion for rotating support, with which the wire reel is matched through its shaft hole. A ratchet assembly, comprising an automatic casting assembly and a manual casting assembly, is arranged between the wire reel and the wire box. The wire reel is provided with an inner ring gear and an outer ring gear in coaxial relationship. The automatic casting assembly includes a first spring that presses a first pawl to the outer ring gear, and the manual casting assembly includes a second spring that presses a second pawl to the inner ring gear. The structure is reasonable in layout, and the relative rotation in the axial direction is based on a damping force, which is helpful to decrease friction and reduce wear of the wire reel and the casting cover caused by a large impact force at the moment of wire casting, thus prolonging the service life of the automatic casting device. In addition, two kinds of casting structures are provided, which can provide more casting methods, avoiding the problem of improper matching caused by automatic casting, improving the practicability and working stability of the structure.