Hay Rake Chassis Double Rockers for Uneven Ground Adaptation
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Solution Overview
Problem
Large-diameter rotary rake gyros in hay-making machines face challenges in adapting to uneven ground, leading to tine penetration and forage contamination due to limitations in wheel spacing and design, which results in broken tines and inefficient harvesting.
Innovation Solution
A rotary swather with a chassis featuring at least six feeler and support wheels mounted on three double rockers, allowing for smooth ground contact and adjustment, ensuring all wheels remain in contact during pitching and rolling, and enabling central height adjustment for optimal ground adaptation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If larger diameter gyroscopes are used to increase working width, then productivity is improved, but ground adaptation capability deteriorates
Solution Approach 1:
The chassis is divided into multiple independent wheel units (at least six feeler and support wheels) mounted on double rockers, allowing each wheel to independently adapt to ground contours while supporting the large-diameter gyroscope structure
Solution Approach 2:
The double rocker mechanism provides dynamic adaptation by allowing the wheels to move relative to the chassis frame, enabling the large gyroscope to follow ground contours through mechanical motion rather than rigid contact
2Adaptability or versatility
If wheel diameter is increased to improve ground contact, then ground adaptation is improved, but installation space requirements worsen
Solution Approach 1:
The double rocker mechanism introduces an additional degree of freedom by allowing wheels to pivot on rockers, achieving effective ground contact through angular motion rather than requiring large wheel diameters that would consume excessive installation space
3Stability of the object's composition
If chassis weight support is increased to improve stability, then slope stability is improved, but force transmission complexity worsens
Solution Approach 1:
The double rocker mechanism extracts the weight support function from the central axis force transmission path, allowing the chassis weight to be supported directly by the wheels through the rocker mechanism, thereby simplifying the force transmission path and reducing complexity
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
This configuration minimizes tine penetration and forage contamination, ensuring smooth operation and improved slope stability, reducing the risk of broken tines and maintaining a clean harvest.
Implementation Method 1
Two double rockers essentially run in the direction of travel and the third double rocker, designed as a transverse yoke, runs transversely to the direction of travel
Implementation Method 2
Gravity takes over the function of securing ground contact between the wheels of the chassis of a rotary rake
Data Source
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AI summary
The haymaking machine has a rack spinner driven around a spinner axis directed upwards and assembled with rack tooth (1). The chassis (3) has three double swings (7,7',9) held at pendulum axis and each double swing has two roller feeler and carrying wheel or depth wheel (4). Two pendulum axis runs approximately transverse to the direction of motion (F) and a pendulum axis runs approximately in direction of motion.