Square Baler Ejector System with Dual Shuttle Assemblies
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Solution Overview
Problem
Existing square baler ejector systems require complex control of individual dogs and manual inspection to determine which bales to discharge, leading to operational inefficiencies.
Innovation Solution
A dual shuttle assembly system where one shuttle advances the last bale and another advances the next-to-last bale, allowing for independent or combined operation to discharge either or both bales without manual positioning, using pivotable dogs that engage and retract automatically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If individual dogs are controlled selectively to discharge specific bales, then the ability to discharge only the last bale or both the last and next-to-last bale is achieved, but the device complexity increases due to the need for a selector assembly and manual inspection
Solution Approach 1:
The ejector system is divided into two independent shuttle assemblies: the first shuttle assembly handles discharge of the last bale, while the second shuttle assembly handles discharge of the next-to-last bale. Each shuttle assembly operates independently with its own dogs, eliminating the need for complex selective control of individual dogs within a single assembly. This segmentation allows versatile discharge options while simplifying the control mechanism for each individual shuttle.
2Adaptability or versatility
If multiple dogs are arranged in a series on a single shuttle assembly, then the ability to discharge different numbers of bales is achieved, but the ease of operation deteriorates due to the need for manual inspection of bale positions
Solution Approach 1:
Instead of having one shuttle assembly with multiple dogs that require selective activation, the system segments the function into two shuttle assemblies, each with dogs that automatically engage based on their fixed positions. The first shuttle's dogs are positioned to engage the last bale, while the second shuttle's dogs are positioned to engage the next-to-last bale, eliminating the need for manual inspection and selection.
Solution Approach 2:
The dogs on each shuttle assembly are designed to automatically engage with the appropriate bales based on their fixed positions and the shuttles' reciprocating motion. The system serves itself by using the mechanical interaction between the dogs and bales to achieve selective discharge without requiring the operator to manually inspect bale positions or activate specific dogs.
3Device complexity
If a single shuttle assembly with multiple dogs is used, then the structure is simpler, but the reliability decreases due to the need for precise control and positioning of individual dogs
Solution Approach 1:
The system uses two simpler shuttle assemblies instead of one complex shuttle assembly with selectively controllable dogs. Each shuttle assembly has a straightforward structure with dogs positioned to engage specific bales, improving reliability by eliminating the need for complex control mechanisms while maintaining the ability to discharge different numbers of bales.
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
Enables efficient and automated discharge of bales without the need for manual control of dogs, simplifying the operation and reducing complexity, while allowing for selective discharge of either the last or both the last and next-to-last bales.
Implementation Method 1
each dog is pivotably mounted on the shuttle assembly and designed to act in a manner analogous to the pawl of a pawl and ratchet. Thus, each dog will pivot into an extended gripping position during the forward movements of the shuttle to advance the bale towards the discharge outlet and will retract during reverse movements of the shuttle assembly to slip relative to the bale.
Data Source
AI summary
A square baler has an ejector system including a shuttle assembly mounted in a wall of the bale case for reciprocation parallel to the direction of movement of the bales in the bale case. A least one dog mounted on the shuttle assembly engages in the last bale in the bale case positioned nearest the discharge outlet and advances the bale incrementally in response to reciprocation of the shuttle assembly. A second shuttle assembly is mounted in a wall of the bale case for reciprocation independently of the first shuttle assembly. The second shuttle assembly has at least one dog to engage in the next-to-last bale in the bale case. By selecting which of the shuttle assemblies to activate, an operator may elect to eject only the last base in the bale case or the last two bales.