Robotic Lawnmower Edge Trimmer for Complete Lawn Coverage
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Solution Overview
Problem
Conventional robotic lawnmowers fail to trim weeds along the edges of lawns, leaving uncovered areas that require manual trimming, increasing user workload.
Innovation Solution
A robotic lawnmower equipped with a trimmer mechanism, including a mount, trimmer head, drive motor, and control assembly, capable of trimming areas near the edges, featuring a detection assembly to monitor trimmer line length and an edge contact assembly for navigation adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional robotic lawnmower design is used, then the structure is simple and easy to manufacture, but it cannot cover and trim areas within a specific width distant from the edges of the lawns
Solution Approach 1:
The robotic lawnmower is divided into two independent functional modules: a main cutting device for open areas and a trimmer mechanism for edge areas. The trimmer mechanism includes a separate trimmer head, spool, and drive motor that can be independently controlled and mounted on the side of the robotic body, allowing each module to optimize its design for specific cutting tasks
Solution Approach 2:
The robotic lawnmower integrates multiple functions into a single system: the main cutting device handles grass in open areas while the trimmer mechanism handles grass along edges and in hard-to-reach areas. Both mechanisms share common components like the robotic body, control system, and power source, allowing the system to perform multiple cutting tasks without requiring separate devices
2Productivity
If the trimmer mechanism is added to cover edge areas, then the coverage area is improved, but the device complexity increases
Solution Approach 1:
The trimmer mechanism is integrated with the main robotic body through a shared mounting structure and control system. The connection portion with mounting holes allows the trimmer head to be securely attached to the robotic body, while the control assembly coordinates both the main cutting device and trimmer mechanism through a unified control architecture, reducing overall system complexity
Solution Approach 2:
The detection assembly automatically monitors grass length and triggers the trimmer mechanism when edge areas require trimming. The system self-regulates by detecting when the trimmer line needs to be extended or when trimming operations are complete, eliminating the need for manual intervention or complex external control systems
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 trimmer mechanism effectively covers and trims areas near the edges, reducing manual workload and ensuring complete lawn maintenance without manual intervention.
Implementation Method 1
an elastic member is situated between the spool and a top portion of the housing, the elastic member is configured to drive the spool to be abutted against the bottom portion of the housing such that the ratchet bump is inserted into the ratchet groove
Implementation Method 2
the drive motor is arranged on the stand, an output shaft of the drive motor extends into the housing and is connected to the spool, the drive motor is configured to drive the spool to rotate and drive the housing to synchronously rotate to drive the trimmer line to rotate and unreel the trimmer line
Implementation Method 3
a ratchet bump is arranged at a bottom portion of the housing, wherein the through hole is in communication with the accommodation chamber, a ratchet groove is arranged in the spool... such that the ratchet bump is inserted into the ratchet groove and is meshed with the ratchet groove in a rotation direction of the drive motor
Data Source
AI summary
A robotic lawnmower comprising a robotic body and a trimmer mechanism. A mount column hole is arranged in a side face of the robotic body. The trimmer mechanism includes a mount, a trimmer head and a drive motor. The mount includes a stand and a connection portion. The connection portion is fixedly connected to the stand and configured to be inserted into the mount hole. The trimmer head is rotatably arranged on a bottom face of the stand. The drive motor is configured to drive the trimmer head to rotate. The robotic lawnmower with the trimmer mechanism is capable of covering and trimming the areas within a specific width distant from the edges of the lawns, which effectively solves the problem that the conventional robotic lawnmowers are incapable of covering and trimming such areas of the lawns, reduces manual workload, and lowers cost of manpower.