Robotic Lawnmower Cutting Deck Linkage for Angle Adjustment
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Solution Overview
Problem
Existing robotic lawnmowers face challenges in adjusting the cutting disc angle of approach towards the ground, which is necessary for achieving optimal cutting performance and maintaining the correct angle due to wear or accidents, without being complicated or unreliable.
Innovation Solution
A robotic lawnmower cutting deck with a cutting system comprising cutters supported by a cutter support beam, pivotingly attached to link arms via pivot pins, allowing adjustable rotation around a longitudinal beam extension through threaded adjustment bolts and locking screws, ensuring accurate and secure angular positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cutting disc angle is made adjustable to maintain optimal cutting performance after wear or collisions, then the reliability and cutting quality are improved, but the device complexity increases due to additional adjustment mechanisms
Solution Approach 1:
The cutting deck is designed with dynamic adjustability, allowing the cutting disc angle to be changed from a fixed to a variable configuration. The parallel linkage mechanism with adjustable link lengths enables the cutting deck to assume different angular positions relative to the horizontal, allowing optimization of cutting performance based on wear or collision conditions while maintaining structural integrity through the parallelogram configuration
Solution Approach 2:
The invention changes the geometric parameters of the support structure by making the link lengths adjustable. By varying the lengths of links in the parallel linkage mechanism, the angle of the cutting deck can be modified without changing the fundamental structure, enabling parameter optimization for different operating conditions while keeping the mechanism relatively simple
2Ease of operation
If quick adjustment means are provided for changing cutting disc angle, then the ease of operation is improved, but the device complexity increases due to additional adjustment components
Solution Approach 1:
The parallel linkage mechanism is designed to be dynamically adjustable through simple link length modifications. The adjustable links allow operators to quickly change the cutting deck angle by reconfiguring the linkage geometry, providing fast adjustment capability without requiring complex mechanical systems or multiple adjustment stages
Solution Approach 2:
The support structure is segmented into multiple adjustable links rather than being a monolithic rigid structure. This segmentation allows independent adjustment of each link's length, enabling quick and simple modification of the cutting deck angle through discrete, manageable components rather than a complex integrated adjustment mechanism
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 uncomplicated, reliable, and accurate adjustment of the cutting disc angle, maintaining optimal grass cutting performance even after wear or collisions, with a lightweight and durable frame structure.
Implementation Method 1
The adjustment aperture is adapted to receive an adjustment bolt with outer adjustment threads that engage the inner adjustment threads. Turning of the corresponding adjustment bolt will move the corresponding holding casing such that the corresponding adjustment pin is moved within the elongated opening.
Data Source
AI summary
A robotic lawnmower cutting deck may include a cutting system which may include at least two cutters with a cutting disc and cutter motor. The cutters may be supported by a cutter support beam which may be supported at respective supporting positions by a first link arm and a second link arm. At each supporting position, the link arms may be pivotably attached to the cutter support beam with a corresponding first pivot pin and second pivot pin that may be fixed relative each other. The link arms may be pivotably attached to a frame part with a corresponding third pivot pin and fourth pivot pin, which may have an adjustable relation relative each other such that the cutter support beam may be rotated about a longitudinal beam extension when the relation between the third pivot pin and fourth pivot pin is adjusted.