Round Baler Catching Stop for Controlled Bale Ejection
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Solution Overview
Problem
Existing round balers for crops face challenges in controlling the ejection of bales on sloping ground, leading to uncontrolled rolling of bales due to the unchecked ejection from the press housing.
Innovation Solution
The ejection flap of the round baler is equipped with a catching stop that protrudes into the path of the bale, which can be pivoted into a catching position to slow down the bale and feature a damping spring for gentle braking, and can be designed as a freely rotatable catching roller for reduced frictional damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the ejection flap is opened to eject the bale, then the bale can be discharged from the press housing, but the bale may roll away uncontrollably on sloping ground
Solution Approach 1:
The catching stop is positioned in advance within the ejection path to intercept the bale before it can roll away uncontrollably. This preliminary positioning of the stopping mechanism resolves the contradiction by preparing the control function before the ejection problem manifests.
Solution Approach 2:
The catching stop acts as an intermediary element between the ejection flap and the bale, providing controlled deceleration. This mediator allows the bale to be discharged while preventing uncontrolled rolling, thus resolving the contradiction between ease of ejection and placement control.
2Reliability
If a catching stop is added to control bale ejection, then bale placement control is improved, but the device complexity increases
Solution Approach 1:
The catching stop is integrated with the ejection flap assembly, combining the ejection function and the control function into a single structural unit. This merging reduces device complexity by eliminating separate control mechanisms while maintaining reliable bale placement control.
Solution Approach 2:
The catching stop is designed to function automatically as the ejection flap opens, utilizing the natural motion of the flap to activate the stopping action. This self-service design reduces complexity by eliminating the need for separate actuators or control systems.
3Speed
If a rigid catching stop is used to stop the bale, then braking effectiveness is improved, but damage to the bale casing increases
Solution Approach 1:
The catching stop is designed with cushioning characteristics that absorb impact energy during bale deceleration. This beforehand cushioning prevents damage to the bale casing while maintaining effective braking, resolving the contradiction between stopping power and damage prevention.
Solution Approach 2:
The catching stop is designed to change its interaction parameters with the bale during deceleration, transitioning from high friction to rolling contact. This parameter change allows effective speed reduction while minimizing damaging frictional forces on the casing.
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 solution ensures controlled placement of bales on the ground by decelerating them with the catching stop, minimizing the risk of further rolling on sloping surfaces and preventing damage through gentle braking, while maintaining simple construction conditions.
Implementation Method 1
the catch stop can be supported against the ejection flap by means of a damping spring
Implementation Method 2
the catch stop can be supported against the ejection flap by means of a damping spring
Implementation Method 3
the catching stop can be designed as a freely rotatably mounted catching roller, so that the catching roller can roll on the casing of the bale of straw
Data Source
Figure 1
Figure 2
AI summary
A round baler for straw is described, comprising a press housing (2) mounted on a chassis (1). The press housing includes a chassis-fixed housing part (3) and a discharge flap (4) pivotally mounted on this housing part (3) about an upper pivot axis (5). In its open position, the discharge flap defines a discharge opening for the straw bale (7) rolling out of the press housing (2). To ensure advantageous discharge conditions for the straw bales (7), it is proposed that the discharge flap (4) has, at its end opposite the pivot axis (5), a catch stop (12) for the straw bale (7) projecting into the path of the straw bale (7) rolling out of the press housing (2) in a predetermined catching position.