Baler Ejection Arrangement with End Dogs
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Solution Overview
Problem
Existing baler ejection systems face issues such as slippage during initial strokes due to improper engagement of tines, complexity, and lack of robustness, leading to bale damage and inefficient ejection.
Innovation Solution
A robust ejection arrangement with a shuttle assembly featuring end dogs that engage substantially behind the bale at the inlet of the bale chamber, reducing slippage and increasing eject force, and a dual shuttle assembly design with elongated members and pivotally mounted dogs to enhance engagement and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the projecting tips of the dogs are used to engage in the bale during initial strokes, then the ejection system can move the bale, but slippage occurs due to improper engagement leading to bale damage
Solution Approach 1:
The ejection system is divided into two functional parts: end dogs positioned at the inlet end of the bale chamber that engage behind the bale, and conventional dogs positioned along the bale chamber that engage in the bale body. This segmentation allows the end dogs to provide stable initial engagement without slippage while the conventional dogs handle the ejection motion.
Solution Approach 2:
The end dogs act as an intermediary element between the shuttle assembly and the bale during initial engagement. By positioning these dogs at the inlet end to engage behind the bale first, they serve as a mediator that establishes proper engagement before the main ejection force is applied, preventing direct slippage between the conventional dogs and the bale.
2Force
If conventional dogs are positioned to engage in the bale body, then ejection force can be applied, but slippage occurs during initial strokes
Solution Approach 1:
The end dogs perform a preliminary engagement action by positioning themselves to engage behind the bale at the inlet end before the main ejection sequence begins. This preliminary action ensures proper engagement is established first, preventing slippage during the initial strokes before the full ejection force is applied by the conventional dogs.
3Device complexity
If a single shuttle assembly is used for ejection, then the system structure is simpler, but ejection efficiency is reduced
Solution Approach 1:
The ejection system is segmented into end dogs located at the inlet end and conventional dogs positioned along the bale chamber, allowing each to perform specialized functions that together achieve efficient ejection without requiring multiple complete shuttle assemblies.
4Device complexity
If the dogs are freely rotatable around a pivot point, then the ejection system is simpler, but robustness is reduced
Solution Approach 1:
The dogs are mounted on pivot points that allow controlled rotation between engaged and disengaged positions. This dynamic mounting provides robustness during engagement while allowing the dogs to be retracted during reciprocation, combining structural strength with operational flexibility.
Data Source
AI summary
A rectangular baler comprising a bale chamber; a compacting plunger moveable between a retracted position and an extended position; an ejection arrangement provided in a wall comprising a shuttle assembly with at least one dog mounted for protruding from said wall when the shuttle assembly is moving from a rest position in the forward direction to move one or more bales forward; wherein at least one end dog is located in the rest position of the shuttle assembly in a zone near of the plunger in the extended position thereof, such that when the shuttle assembly moves in the forward direction, said at least one end dog is engageable behind a bale adjacent the inlet of the bale chamber.