Crop Stripper Header Tooth and Backer Mounting for Fast Replacement
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Solution Overview
Problem
Conventional crop stripper headers face challenges in the labor-intensive installation and replacement of stripper teeth sections and backer plates, with hardware security issues due to plastic expansion and contraction, leading to potential loosening and loss of bolts.
Innovation Solution
A mounting system for stripper tooth sections and backer plates using keyhole slots and threaded fasteners that allow for secure attachment to a central core, enabling simultaneous installation and removal of these components as a pair, with the fasteners applying clamping force through metal inserts to prevent deformation and ensure secure retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional mounting slots with threaded fasteners are used to attach stripper teeth sections and backer plates, then the components can be securely attached to the central core, but the installation and replacement process becomes labor-intensive and time-consuming
Solution Approach 1:
The mounting system is divided into modular components: keyhole slots in the stripper teeth sections and backer plates, threaded fasteners, and metal inserts. This segmentation allows for easier assembly and disassembly while maintaining secure attachment during operation.
Solution Approach 2:
The keyhole slot design provides dynamic mounting capability - during installation, the slot allows insertion from multiple angles, and during operation, the threaded fastener secures the component firmly. This transitions the mounting from a static rigid connection to a dynamic assembly process that is both secure and time-efficient.
2Weight of moving object
If plastic backer plates are used for mounting, then the structure can be lightweight and cost-effective, but the plastic expansion and contraction causes hardware to loosen and bolts to be lost
Solution Approach 1:
Metal inserts are introduced as intermediary elements between the plastic backer plate and the threaded fastener. These inserts provide a stable, non-deforming mounting surface that prevents hardware loosening while allowing the plastic backer plate to maintain its lightweight and cost-effective properties.
Solution Approach 2:
The mounting system uses composite construction by combining plastic backer plates with metal inserts. This composite approach leverages the advantages of both materials: the lightweight and economical properties of plastic, combined with the dimensional stability and hardware-retention properties of metal.
3Manufacturing precision
If multiple stripper teeth sections and backer plates are mounted individually, then each component can be precisely positioned, but the overall assembly process becomes complex and lengthy
Solution Approach 1:
The keyhole slot design allows stripper teeth sections and backer plates to be positioned and secured through a unified mounting mechanism. This merging of positioning and fastening operations into a single keyhole interface simplifies the overall assembly process while maintaining precise component positioning.
Data Source
AI summary
In a crop stripper rotor including a central core defining angularly spaced mounting slots facing outwardly of the axis in each slot is mounted a stripper tooth section and an overlying backer section with the stripper teeth aligned with the backer fingers to form a pair held in place by threaded fasteners extending through mounting holes at the slot to secure the pair to the central core. Each threaded fastener is threaded to a plate on one side of the slot. The stripper second and backer section each have key hole shaped mounting slots at the inner edge so that rotation in an unthreading direction releases the sections to move outward for removal. The backer section is formed of plastic and includes a metal insert at the slot. The backer section has a ledge along the inner edge thereof and projecting knubs in one face to locate the stripper section.