Rolling Lawn Aerator With Vertical Soil Perforating Pipes
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Solution Overview
Problem
Lawn turf becomes solid and hard due to watering and treading, reducing aeration and water permeability, which affects normal growth.
Innovation Solution
A rolling lawn aerator with perforating devices that include perforating pipes and limiting members, allowing for vertical insertion and extraction into the soil to aerate and perforate the ground, minimizing resistance and damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional manual aeration methods are used, then lawn aeration can be achieved, but labor intensity is high and manual effort is required
Solution Approach 1:
The aerator utilizes the weight of the device itself and the elastic force of the spring to automatically drive the perforating pipes into the soil and pull them out, eliminating the need for manual operation. The device serves itself by converting gravitational force and elastic potential energy into mechanical work for soil perforation.
Solution Approach 2:
The perforating pipes are designed to be rotatable relative to the device body, allowing dynamic adjustment of their orientation. The spring enables the pipes to rotate and return to their initial positions automatically, transforming a static manual operation into a dynamic automated process that adapts to soil conditions.
2Reliability
If perforating pipes are inserted vertically into soil, then aeration effect is improved, but insertion resistance increases
Solution Approach 1:
The spring is pre-loaded to store elastic potential energy, which is then converted into kinetic energy during the perforation process. This preliminary energy storage enables the perforating pipes to overcome soil resistance and insert vertically without requiring continuous external force application.
Solution Approach 2:
The perforating pipes operate in a periodic cycle of insertion and extraction, driven by the spring's expansion and contraction. This periodic motion allows the pipes to penetrate the soil vertically repeatedly, maintaining aeration effectiveness while managing insertion resistance through rhythmic rather than continuous force application.
3Ease of operation
If perforating pipes rotate freely, then ease of operation improves, but control over insertion angle is lost
Solution Approach 1:
The spring provides a feedback mechanism that automatically adjusts the perforating pipes' orientation. When the pipes rotate during insertion, the spring's elastic force counteracts excessive rotation and returns the pipes to their optimal vertical position, creating a self-regulating system that maintains insertion angle control while allowing necessary rotation freedom.
Solution Approach 2:
The system changes the physical state of the spring from a relaxed state to a compressed state during pipe insertion, and back to relaxed state during extraction. This parameter change in the spring's elastic potential energy enables controlled rotation and return motion, balancing rotation freedom with insertion angle precision through energy transformation.
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
Enhances soil aeration, improves water and nutrient penetration, and reduces manual effort and lawn damage during the aeration process.
Implementation Method 1
Each limiting member comprises an elastic member, and the elastic member is connected to the body assembly and the respective perforating pipe. When the perforating device rolls in a first direction to perform a perforating operation, each elastic member is configured to be connected to the respective perforating pipe in contact with the ground of the lawn and is capable of limiting rotation of the perforating pipe with the body assembly
Implementation Method 2
under the condition of no external force, an extension direction of the perforating pipe does not coincide with a radial direction of the body assembly. When the perforating device rolls in a first direction to perform a perforating operation, each elastic member is configured to be connected to the respective perforating pipe in contact with the ground of the lawn and is capable of limiting rotation of the perforating pipe with the body assembly, so that the perforating pipe is inserted into the soil under the lawn at an approximately vertical angle and pulled out of the soil at an approximately vertical angle
Data Source
AI summary
The present application discloses a rolling lawn aerator, including a perforating device, where the perforating device is capable of rolling on a lawn so as to perforate and aerate the lawn. The perforating device includes a body assembly and a plurality of perforating assemblies, and the plurality of perforating assemblies are arranged in a circumferential direction of the body assembly; and each of the perforating assemblies includes a perforating pipe, and at least a part of a structure of the perforating pipe exceeds the body assembly in a radial direction of the body assembly.