Square Baler Plunger Pivoting Mechanism for Density
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Solution Overview
Problem
Existing agricultural balers face challenges in increasing bale density without significantly increasing the reactive forces on the plunger, which can lead to inefficient compression and long-term operation issues.
Innovation Solution
A plunger mechanism with a first guide mechanism allowing pivoting about an axis parallel to the opening and a second guide mechanism connected to the bale chamber walls, enabling the plunger end face to compress crop material equally, reducing reactive loads by controlling the orientation of the plunger as it reciprocates between positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the resistive force of the plunger is increased to achieve greater bale density, then the density of crop material in the bale is improved, but the reactive forces on the plunger and reciprocating mechanism increase which is not desirable for long-term operation
Solution Approach 1:
The plunger is designed to rock or pivot about a horizontal axis during its reciprocating motion, transitioning from a horizontal to an inclined position. This dynamic orientation change allows the plunger to compress crop material more effectively (increasing density) while distributing the reactive forces differently, reducing the peak forces transmitted to the reciprocating mechanism and improving long-term operational reliability.
2Force
If a complex mechanism is used to reduce force applied to the plunger, then the reactive forces are reduced, but the device complexity increases and additional costs are incurred
Solution Approach 1:
The guiding mechanism is divided into two independent components: a first guide mechanism that constrains the reciprocating motion of the plunger, and a second guide mechanism that controls the rocking or pivoting motion about the horizontal axis. This segmentation allows each guide mechanism to perform a specific function with simple structure, avoiding the need for a single complex mechanism while achieving both force reduction and density improvement.
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
The solution allows for increased bale density without increasing reactive forces on the plunger, facilitating efficient compression and bale formation with a simplified and cost-effective mechanism.
Implementation Method 1
the plunger compresses the wad of crop material into flakes to form a bale
Implementation Method 2
A first guide mechanism for translation of the plunger between the first and second positions, the first guide mechanism permitting pivoting of the plunger about an axis substantially parallel to the front edge of the opening
Data Source
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AI summary
A baler (10) having a reciprocating plunger (30) within a main bale chamber (26) for compressing crop material (52) into bales (54). The plunger (30) has a first guide mechanism (76) for permitting linear movement within the main bale chamber (26) that allows a pivoting of an end face (66). A second guide mechanism (78) includes a slot (64) allowing the plunger (62) to be oriented so that the second edge (70) of the end face (66) compresses crop material first and then subsequently pivots to compress equally and finally to have the second edge (70) leading the first edge (68) of the end face (66) away from the bale (54) to provide greater bale compression without additional force.