Brush Cutter Swing Assistance Device with Multi-Axis Rotation
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Solution Overview
Problem
Conventional swing assistance devices for brush cutters restrict free swing operations, leading to increased fatigue and difficulty in performing neat and tidy mowing, especially for beginners, as they only allow rotation in left-right or front-back directions, making it challenging to maintain the blade at a consistent height and increasing the risk of injury.
Innovation Solution
A swing assistance device with a bracket, coupling unit, extension rods, rotation parts, and rotation rollers that enable free swing operations in both left-right and front-back directions, along with a slope adjustment unit using a pivot structure and restoration springs, allowing the blade to be inclined and maintained at a predetermined height, reducing operator fatigue and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wheels are attached to the shaft to support the blade at a predetermined height, then the blade is spaced apart from the ground, but the wheels can only rotate in left-right or front-back directions, increasing operator fatigue and restricting free swing operations
Solution Approach 1:
The patent applies the dynamics principle by making the rotation part rotatable about a vertical axis in addition to the horizontal rotation. This dynamic configuration allows the wheel to adapt its rotation axis orientation, enabling free swing operations in any direction while maintaining blade height stability, thus resolving the contradiction between reliability and ease of operation.
Solution Approach 2:
The patent introduces an additional rotational dimension by allowing the rotation part to rotate about a vertical axis perpendicular to the ground. This dimensional addition transforms the wheel from a single-axis rotator to a multi-axis rotator, enabling three-dimensional swing operations while maintaining the height-support function, thereby resolving the contradiction between blade height stability and swing freedom.
2Object-affected harmful factors
If the shaft is lifted to maintain spacing from the ground during swing operations, then the blade does not hit the ground, but beginners find this operation inconvenient and dangerous
Solution Approach 1:
The patent applies preliminary action by pre-configuring the rotation part and wheel structure to automatically maintain the blade at a predetermined height above the ground. This preliminary setup eliminates the need for beginners to manually lift and adjust the shaft during swing operations, preventing blade-ground contact while simplifying the operation for inexperienced users.
Solution Approach 2:
The patent implements self-service through the automatic height-maintaining mechanism where the rotation part and wheel work together to keep the blade spaced from the ground without requiring continuous manual intervention. The system self-adjusts during swing operations, making the brush cutter safe and convenient for beginners without requiring them to understand complex handling characteristics.
3Device complexity
If conventional wheels are used that rotate only in left-right or front-back directions, then the structure is simple, but a free swing operation is not enabled, increasing operator fatigue
Solution Approach 1:
The patent applies dynamics by introducing a rotatable rotation part that can orient itself in different directions. This dynamic component allows the wheel to rotate about a vertical axis in addition to its horizontal rotation, enabling free swing operations in any direction. The added functionality is achieved through a relatively simple structural addition that does not significantly increase overall device complexity while dramatically reducing operator fatigue.
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
Enables easy and convenient mowing for beginners by allowing free swing operations and adjustable blade height, minimizing fatigue and improving operating efficiency while preventing blade contact with the ground, thus enhancing safety and work quality.
Implementation Method 1
a plurality of rotation rollers rotatably coupled to the outer circumference of each of the left and right rotation parts at predetermined intervals, and configured to, when the shaft swings in the left-right directions, rotate with respect to the ground and assist in the swing operation in the left-right directions by allowing the left and right rotation parts to be moved in front-back directions
Implementation Method 2
a restoration spring coupled to the coupling unit and configured to restore the coupling unit to an initial state in which the insertion depression receives the shaft
Data Source
AI summary
A swing assistance device for a brush cutter. The swing assistance device includes: a bracket; a coupling unit disposed on the top surface of the bracket, and coupled to a shaft at an inclined angle; left and right extension rods configured such that the outer ends thereof are located on both sides of a blade with the inner ends thereof coupled to both sides of the bracket; left and right rotation parts rotatably coupled to the outer ends of the left and right extension rods, and configured to, when the shaft swings in left-right directions, rotate while drawing arcs and assist in the swing operation; and a plurality of rotation rollers rotatably coupled to the outer circumference of each of the left and right rotation parts, and configured to, when the shaft swings in the left-right directions, rotate and assist in the swing operation.