Wrap Feed Nip Assembly for Bale Wrap Misfeed Prevention
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Solution Overview
Problem
Wrap material misfeeds during the wrapping process in crop baling systems, particularly due to adverse weather conditions and varying material properties, leading to improperly wrapped bales and requiring costly machine service.
Innovation Solution
A nonhomogeneous nip system with movable wrap frame roller members and chassis roller members that form varying nips at different positions of the wrap floor assembly, ensuring consistent material delivery regardless of the assembly's position relative to the chassis, and a persistent nonhomogeneous nip system that maintains nips throughout position transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If delivery assist nips are provided between pinch rollers and wrap floor belts to prevent misfeeds during windy conditions, then wrap material retention is improved, but the system complexity increases due to additional movable components and spring biasing mechanisms
Solution Approach 1:
The pinch rollers are made movable relative to the chassis through pivotal support assemblies that allow dynamic adjustment. Springs provide continuous biasing force to maintain engagement between the movable pinch rollers and the wrap floor belts, ensuring the nips remain active throughout the wrap floor assembly's range of motion without requiring complex locking mechanisms
Solution Approach 2:
The spring-biased movable pinch rollers automatically self-adjust to maintain contact with the wrap floor belts throughout the wrap floor assembly's movement cycle. The system uses the inherent motion of the wrap floor assembly itself to drive the pinch rollers through their engagement cycle, eliminating the need for separate actuation mechanisms
2Device complexity
If homogeneous nips are formed by the same set of pinch rollers and wrap floor belts regardless of wrap floor assembly position, then the nip system is simpler to design, but it cannot maintain consistent wrap material delivery when the wrap floor assembly moves between raised and lowered conformations
Solution Approach 1:
Different nips are created at different positions of the wrap floor assembly. When the wrap floor assembly is in the lowered conformation, first nips are formed between the movable wrap frame roller members and chassis roller members. When raised, second nips are formed between the chassis roller members and the wrap floor belts. This local differentiation ensures consistent wrap material delivery throughout the full range of motion
Solution Approach 2:
The system transitions from a static homogeneous nip configuration to a dynamic nonhomogeneous configuration that adapts to the wrap floor assembly's position. The movable pinch rollers and wrap frame roller members automatically adjust their engagement points based on the wrap floor assembly's conformation, maintaining reliable wrap material delivery without requiring manual intervention or complex 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
Reduces wrap material misfeeds, ensuring consistent and efficient wrapping, thereby minimizing the need for costly machine service and improving bale quality.
Implementation Method 1
a plurality of chassis roller members biased relative to the chassis of the associated harvester towards the associated wrap floor assembly
Data Source
AI summary
A nip system is provided for use with an associated wrap floor assembly that is movable between lowered and raised positions relative to a chassis supporting a module builder of an associated harvester. Wrap frame roller members are connected with a frame structure of the associated wrap floor assembly, wherein the wrap frame roller members are movable together with the associated wrap floor assembly between the lowered and raised positions relative to the chassis of the associated harvester. Chassis roller members are provided that are biased relative to the chassis of the associated harvester towards the associated wrap floor assembly. A method of retrofitting a nip system provides a persistent nonhomogeneous nip system in an associated wrap floor assembly that is movable between lowered and raised positions relative to a chassis supporting a module builder of an associated harvester.