Cattle Head Gate Eccentric Crank Adjustment and Torsion Bar
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Solution Overview
Problem
Conventional head gates for cattle containment chutes lack efficient adjustment mechanisms for accommodating animals of different sizes, leading to potential injury and difficulty in quick confinement, and do not facilitate easy release or stress reduction during treatment.
Innovation Solution
The head gate design includes adjustable upstanding squeeze bars with an eccentric crank mechanism for rapid width adjustment, a neck sweep bar for improved access during treatment, and an enhanced latching system for easy release, along with a torsion bar to absorb impact forces and reduce stress on the animal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the head gate uses fixed spacing squeeze bars, then the structure is simple, but it cannot accommodate animals of different sizes and may cause injury
Solution Approach 1:
The head gate employs an adjustable spacing mechanism that allows the squeeze bars to be dynamically repositioned along the door structure. This enables the gate to adapt its width to match different animal sizes, transforming a static structure into a dynamic one that can respond to varying operational requirements.
Solution Approach 2:
The invention changes the spatial parameter of the squeeze bar positioning by providing multiple predetermined positions along the door. This allows the operator to adjust the spacing between bars to match the size of the animal being confined, thereby resolving the contradiction between fixed simple structure and adaptable functionality.
2Reliability
If the head gate bars are positioned close together for small animals, then small animals can be properly trapped, but larger animals may be injured
Solution Approach 1:
The adjustable spacing mechanism allows the operator to dynamically set the appropriate bar distance based on the animal size before confinement begins. This ensures that the squeeze bars are positioned to match the animal's dimensions, providing reliable confinement without causing injury from excessive compression.
Solution Approach 2:
The head gate allows preliminary adjustment of the bar spacing to match the anticipated animal size before the animal enters. This preliminary action ensures that the confinement parameters are properly set in advance, preventing both ineffective trapping and potential injury during the confinement process.
3Ease of operation
If the head gate requires manual handling for each animal, then precise control is possible, but the process is time-consuming
Solution Approach 1:
The quick-adjust mechanism allows the operator to rapidly reposition the squeeze bars between animals without complex procedures. This dynamic adjustment capability significantly reduces the time required to prepare the head gate for different animal sizes while maintaining precise control over the spacing.
Solution Approach 2:
The head gate provides predetermined adjustment positions that can be quickly selected and locked into place before each animal enters. This preliminary positioning reduces the time needed for adjustment during the confinement process, as the operator simply needs to select from pre-established positions rather than making continuous fine adjustments.
4Strength
If the head gate doors are heavy for strength, then they can withstand animal force, but they are difficult to release quickly
Solution Approach 1:
The latch mechanism acts as an intermediary that decouples the strength requirement from the release operation. The latch holds the heavy doors in the closed position, allowing the doors to be strong without requiring constant manual force to maintain closure. Releasing simply requires operating the latch, not moving the entire door assembly.
Solution Approach 2:
The head gate design allows the doors to self-maintain their closed position through the latching mechanism once closed, without requiring continuous manual effort. The operator only needs to initially close and latch the doors, after which the system maintains itself until release is deliberately triggered, reducing operational effort for both closing and releasing.
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 quick and safe confinement of animals of varying sizes, reduces stress during treatment, and facilitates easy release, improving operational efficiency and animal safety.
Implementation Method 1
an upstanding torsion bar rigidly connected at an upper end to the upper rail and rigidly connected at a lower end to the lower rail; the upstanding torsion bar being arranged so as to twist when forces are applied to the upstanding squeeze bars from impact with the animal
Implementation Method 2
an eccentric crank mounted on the upper rail rotatable about a crank axis transverse to the upper rail; an upper link connecting the eccentric crank to the upstanding squeeze bar where rotation of the eccentric crank about the crank axis causes the upstanding squeeze bar to move toward and away from the pivot axis
Data Source
AI summary
An animal head gate includes head gate doors each having a squeeze bar to trap the neck mounted between upper and lower rails. Adjustment of the spacing between the bars uses an eccentric crank operated by lever which cooperates with two manual latches on a rail at maximum and minimum spacing. A neck sweep bar is mounted on one gate and movable from a retracted position to a position forward of the squeeze bar across the head gate so as to engage the neck of the animal in front of the squeeze bar and to turn the neck and head. The head gate is held closed by front and rear abutment members each of which is formed as a roller which rotates to reduce friction under load. Each gate includes an upstanding torsion bar which twists when forces are applied to the squeeze bars from impact with the animal.