Haymaking Machine Rake Relief Automation
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Solution Overview
Problem
Existing hay-making machines with multiple raking rotors face issues with uneven soil contact and increased wear due to manual adjustments of relief systems, which are time-consuming and pose safety risks during operation.
Innovation Solution
A hay-making machine with at least two raking rotors equipped with adjustable undercarriages and relief devices, where the distance from the central axis is automatically adjusted by sensors and actuators to maintain consistent weight distribution, eliminating the need for manual adjustments and ensuring optimal soil contact and reduced wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual adjustment of relief devices is performed, then the weight distribution on support wheels can be adjusted, but the operator must leave the cab which increases safety risks and time consumption
Solution Approach 1:
The relief device automatically adjusts the preloading force of the spiral spring based on the distance between the rake rotor and the central axis, eliminating the need for manual intervention. The system self-regulates the weight distribution on support wheels through the actuator controlled by the control unit, allowing the operator to remain in the cab and improving safety.
Solution Approach 2:
The control unit receives input signals about the distance between the rake rotor and the central axis, and automatically adjusts the relief device's preloading force accordingly. This closed-loop feedback system ensures optimal weight distribution without manual intervention, resolving the contradiction between safety and operational ease.
2Adaptability or versatility
If the distance between rake rotor and central axis is changed, then the working width is adjusted, but the relief effect changes causing uneven soil contact and increased wear
Solution Approach 1:
The relief device dynamically adjusts the preloading force of the spiral spring in response to changes in the distance between the rake rotor and the central axis. As the working width is adjusted, the actuator automatically modifies the relief effect to maintain consistent soil contact and prevent uneven wear, enabling adaptability without compromising reliability.
Solution Approach 2:
The control unit continuously monitors the distance between the rake rotor and the central axis, and automatically adjusts the relief device's preloading force to compensate for changes in working width. This feedback mechanism ensures that soil contact remains uniform across different working widths, resolving the contradiction between adaptability and reliability.
3Productivity
If the relief device is not adjusted when working width changes, then manual intervention is avoided, but the rake rotor weight causes increased stress and material fatigue
Solution Approach 1:
The relief device automatically adjusts the preloading force of the spiral spring based on the distance between the rake rotor and the central axis, eliminating the need for manual intervention. The system self-regulates the weight distribution on support wheels through the actuator controlled by the control unit, allowing the operator to remain in the cab and improving safety.
Solution Approach 2:
The control unit receives input signals about the distance between the rake rotor and the central axis, and automatically adjusts the relief device's preloading force accordingly. This closed-loop feedback system ensures optimal weight distribution without manual intervention, resolving the contradiction between safety and operational ease.
4Strength
If the relief device is over-adjusted, then wear is reduced, but the rake rotor cannot maintain sufficient ground contact on uneven terrain
Solution Approach 1:
The relief device dynamically adjusts the preloading force of the spiral spring in response to changes in the distance between the rake rotor and the central axis. As the working width is adjusted, the actuator automatically modifies the relief effect to maintain consistent soil contact and prevent uneven wear, enabling adaptability without compromising reliability.
Solution Approach 2:
The control unit continuously monitors the distance between the rake rotor and the central axis, and automatically adjusts the relief device's preloading force to compensate for changes in working width. This feedback mechanism ensures that soil contact remains uniform across different working widths, resolving the contradiction between adaptability and reliability.
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
Automated adjustment of rake rotor relief ensures consistent crop collection and reduced wear on machine components, eliminating the need for manual adjustments and minimizing the risk of accidents during operation.
Implementation Method 1
spiral springs as well as hydraulic pressure accumulators and/or piston-cylinder units are known
Implementation Method 2
the set distance of a rake rotor to the central axis is detected by at least one sensor and sent to a control unit
Implementation Method 3
with the rake rotors being at least partially provided with a relief device, so that the weight of the rake rotors, which acts on the ground via the support wheels, is reduced, with a change in the distance of a rake gyro to the central axis, the effect of the relief device is automatically adjusted by an adjusting device
Data Source
Figure 1
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Figure 3
AI summary
Haymaking machine (1) with at least two rotary rakes (4) mounted on booms (7), which are equipped with chassis (9) having support wheels (10) to brace themselves against the ground, and whose distance (a) to an imaginary central axis (m) extending longitudinally to the direction of travel (f) of the haymaking machine (1) is individually adjustable by at least one actuator (15), wherein the rotary rakes (4) are at least partially provided with a relief device (16) so that the weight force of the rotary rakes (4) acting on the ground via the support wheels (10) is reduced, wherein by changing the distance (a) of a rotary rake (4) to the central axis (m) the effect of the relief device (16) is automatically adjusted by an adjusting device (21), depending on the distance (a) of the corresponding rotary rake (4), such that the weight force exerted on the support wheels mounted on the chassis (9) is reduced. (10) transferred to the ground,approximately assumes a predetermined value.