Cable Drive Unit With Lateral Drum Motion for Scraper Consistency
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Solution Overview
Problem
Existing free stall cleaner systems with cable drive units face inefficiencies in managing the movement of cables and scrapers, leading to ineffective manure removal in free stall barns.
Innovation Solution
A cable drive unit with a housing, a rotatable drum, and an actuation assembly that allows for bi-directional rotational movement of the drum, enabling the cable to be wound and unwound simultaneously at different ends, thereby moving scrapers effectively along the alleys to collect manure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a traditional cable drive unit is used in a free stall cleaner system, then the structure is simple, but the scraper movement is inconsistent and manure removal is ineffective
Solution Approach 1:
The drum is made laterally movable along the shaft instead of being fixed, allowing dynamic adjustment of cable winding/d unwinding positions. This enables the cable drive unit to adapt to varying alley conditions and maintain consistent scraper movement, directly improving manure removal efficiency while managing structural complexity through controlled mobility
Solution Approach 2:
The cable drive unit is divided into distinct functional modules: the laterally movable drum assembly, the shaft assembly, the actuation assembly, and the support carriage. This segmentation allows each component to be optimized independently and facilitates easier maintenance and adjustment, addressing the complexity concern while enabling improved scraper movement consistency
2Ease of operation
If the drum is fixed during rotation, then the structure is stable, but the cable cannot be effectively wound and unwound at different ends simultaneously
Solution Approach 1:
The drum is configured to move laterally along the shaft during rotation, creating a dynamic system where the cable attachment points are continuously adjusted. This allows effective winding at one end while unwinding at the other, improving ease of operation without requiring complex external mechanisms
Solution Approach 2:
The hub and sleeve structure creates an asymmetric mounting arrangement that allows the drum to move laterally in one direction along the shaft while maintaining rotational stability. This asymmetric design enables differential cable management at opposite ends of the drum, facilitating simultaneous winding and unwinding operations
3Reliability
If scrapers are moved along the alleys, then manure is removed, but the scraper movement is inconsistent leading to ineffective cleaning
Solution Approach 1:
The laterally movable drum ensures that the cable length and tension are dynamically adjusted during operation, maintaining consistent scraper movement along the alleys. This reliability in scraper movement directly translates to improved cleaning efficiency, as scrapers reliably reach and clear manure throughout the entire alley length
Solution Approach 2:
The system provides inherent feedback through the lateral movement of the drum along the shaft, which automatically adjusts cable tension and length based on the position and movement of scrapers. This self-regulating mechanism ensures consistent scraper movement and reliable manure removal without requiring external control systems
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 provides efficient manure removal by ensuring the scrapers move reciprocally and consistently, enhancing the cleaning efficiency of free stall barns without the need for pre-calibration.
Implementation Method 1
The hub and sleeve structure comprises an internal threaded surface and the shaft comprises a worm gear surface along the length for complementary engagement with internal threaded surface to provide the lateral displacement movement
Data Source
AI summary
A cable drive unit for cleaning a free stall comprises a housing defining opposite lateral sides and opposite longitudinal ends defining respective cable openings. A cable drive assembly is mounted within the housing and comprises a shaft mounted to the housing lateral sides. A drum is rotatably mounted to the shaft about a hub and sleeve structure thereof. The hub and sleeve structure mechanically interfaces with a length of the shaft for providing lateral displacement of the drum thereon between the lateral sides of the housing during rotation of the drum. The drum provides for receiving a wound cable thereon. Rotational movement of the drum provides for unwinding the cable therefrom to be moved outwardly of the opening of one of the longitudinal ends and simultaneously moving the cable inwardly at the other one of the longitudinal ends for being wound onto the drum thereby moving scrapers when mounted to the cable.