Robotic Lawn Mower Cutting Assembly for Stable Height Adjustment
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Solution Overview
Problem
Existing robotic lawn mowers have complex and unstable adjusting mechanisms for adjusting the height of their mowing systems, which affect their stability and structural complexity.
Innovation Solution
A height adjusting mechanism that allows the mounting shaft and mowing member to move up and down independently of the prime mover, reducing the number of parts that move synchronously and minimizing weight, thereby improving stability and compactness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the height adjusting mechanism adjusts the entire mowing system including the prime mover, then the mowing height can be changed, but the structure becomes complex and stability deteriorates
Solution Approach 1:
The patent divides the mowing system into two independent parts: the prime mover (fixed) and the cutting assembly (movable). The height adjusting mechanism only moves the cutting assembly relative to the prime mover, rather than moving the entire system. This segmentation allows height adjustment while maintaining system stability and reducing structural complexity.
2Adaptability or versatility
If the height adjusting mechanism moves the entire mowing system, then different mowing heights are achieved, but the number of moving parts increases and device complexity worsens
Solution Approach 1:
The system is segmented into a fixed prime mover and a movable cutting assembly. The height adjusting mechanism only needs to move the cutting assembly, significantly reducing the number of moving parts and structural complexity compared to moving the entire system.
Solution Approach 2:
The prime mover is extracted from the moving components and fixed to the housing. Only the cutting assembly remains as a movable component, which simplifies the height adjusting mechanism and reduces overall device complexity.
3Adaptability or versatility
If the prime mover moves synchronously with the mowing member, then the complete system adjusts, but weight increases and miniaturization becomes difficult
Solution Approach 1:
The patent segments the system so that the heavy prime mover remains fixed while only the lighter cutting assembly moves. This reduces the weight of moving parts and enables miniaturization of the robotic lawn mower.
Solution Approach 2:
The prime mover is extracted from the moving mass and fixed to the housing. This extraction significantly reduces the weight that needs to be moved during height adjustment, facilitating miniaturization and improving overall system efficiency.
Data Source
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AI summary
A robotic lawn mower includes a mowing system, a housing (50), a working assembly and an energy source device. The mowing system includes a cutting assembly, a driving mechanism and a height adjusting mechanism. The cutting assembly includes a mowing member (122) for cutting the grass and a mounting shaft (121) for mounting the mowing member. The mounting shaft (121) is capable of rotating about a first axis (101) relative to the housing. The driving mechanism (110) includes a driving shaft for driving the cutting assembly to rotate. The height adjusting mechanism is used to adjust the movement of the cutting assembly along the first axis (101) to achieve different cutting heights of the mowing member. When the height adjusting mechanism adjusts the cutting assembly to move along the first axis (101), the mounting shaft moves relative to the driving shaft along the first axis (101).