Handheld Soil Cultivation Device with Adjustable Oscillating Tool
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Solution Overview
Problem
Existing handheld soil cultivation tools, both manual and motor-driven, face issues such as user fatigue, need for multiple tools for different tasks, complex maintenance, and inability to adjust the blade position optimally for comfort and effectiveness.
Innovation Solution
A handheld motor-driven soil cultivation device with a removable work tool attached to a drive shaft, allowing for adjustable middle angular position and simplified movement transmission, enabling ergonomic adaptation and efficient operation with reduced friction and wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the motor is located at the high end of the handle, then the structure is simplified, but the weight cannot be used advantageously to improve blade penetration and maintenance becomes tedious
Solution Approach 1:
The patent inverts the conventional motor mounting location from the high end of the handle to the lower end near the cutting tool. This inversion allows the motor weight to be used advantageously to improve blade penetration into the soil while maintaining structural simplicity. The motor is directly coupled to the drive shaft, eliminating complex transmission mechanisms and facilitating easier maintenance.
2Stability of the object's composition
If the cutting tool is attached on both sides of the head, then the structure is stable, but access on both sides is required creating openings for dust and stones
Solution Approach 1:
The patent extracts the cutting tool attachment from the conventional two-sided configuration and relocates it to a single-sided attachment on the drive shaft. This extraction eliminates the need for two-sided access, closing off openings that would allow dust and stones to enter and foul the motor and moving parts. The single-sided attachment maintains structural stability while preventing harmful factors from affecting the device.
3Device complexity
If the middle position of the cutting tool is fixed, then the structure is simple, but the device cannot be adjusted for different ergonomic requirements and soil conditions
Solution Approach 1:
The patent transforms the fixed middle position of the cutting tool into a dynamic, adjustable position. The drive shaft is designed to allow adjustment of the cutting tool's middle angular position relative to the handle, enabling ergonomic adaptation to different users and soil conditions. This dynamic adjustment capability is achieved through a simple mechanism that maintains structural integrity while providing versatility.
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 device provides ergonomic adaptation, reduced user effort, and improved effectiveness by allowing interchangeable tools and optimal blade positioning, enhancing comfort and efficiency in soil cultivation tasks.
Implementation Method 1
under the action of the movement transmitted by a drive device comprising at least one electric actuator
Implementation Method 2
under the action of the movement transmitted by a drive device comprising at least one electric actuator or a heat engine
Data Source
AI summary
A hand-held powered ground and soil cultivation device includes a handle, a first end of which includes a holding zone and/or a holding member for the user, and the opposite end of which includes a head to which a working tool is rotationally or pivotally attached. During operation of the device, the working tool performs a reciprocating oscillating movement along a portion of a rotation and about a predetermined central angular position under the effect of the movement transmitted by a drive unit including at least an electric actuator or a heat engine. The hand-held powered device is characterized in that the working tool is releasably attached to the head, the working tool being mounted on a drive shaft that performs a reciprocating oscillating rotational movement and forms a vertical or horizontal axis of oscillation for the tool. The central angular position of the working tool can be adjusted.