Crop Stripper Header Tooth Plate Mounting for Fast Replacement
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Solution Overview
Problem
Conventional crop stripper headers face challenges in the tedious and labor-intensive process of installing and replacing 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 and backer plates using keyhole slots and threaded fasteners that allow simultaneous installation and removal of paired sections, with metal inserts to prevent plastic deformation and secure clamping, and features like projecting buttons and ledges for precise alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional mounting slots and threaded fasteners are used to secure stripper teeth sections and backer plates, then the components can be attached to the rotor, but the installation and replacement process becomes tedious and labor-intensive
Solution Approach 1:
The mounting system is divided into modular components: keyhole slots in the rotor, corresponding protrusions on tooth sections and backer plates, and threaded fasteners. This segmentation allows each component to be independently manufactured and assembled, simplifying the overall installation process while maintaining security.
2Device complexity
If plastic backer plates are used to reduce weight and complexity, then device complexity is reduced, but the plastic expansion and contraction causes hardware to loosen and bolts to be lost
Solution Approach 1:
Metal inserts are embedded in the plastic backer plates at the mounting locations before final assembly. These inserts provide a rigid, thermally stable foundation for the threaded fasteners, cushioning against the harmful effects of plastic thermal expansion and contraction that would otherwise cause hardware loosening.
Solution Approach 2:
The backer plate system uses a composite construction combining plastic (for weight reduction and corrosion resistance) with metal inserts (for structural stability and fastener security). This composite approach allows the plastic to provide its beneficial properties while the metal inserts compensate for its thermal instability.
3Manufacturing precision
If multiple separate mounting operations are performed for stripper teeth sections and backer plates, then precise alignment can be achieved, but the installation process becomes more complex and time-consuming
Solution Approach 1:
The keyhole slot design merges the alignment and securing functions into a single integrated feature. The tapered geometry of the keyhole slot provides automatic alignment guidance during insertion, while the same slot structure accommodates the threaded fastener for securing, eliminating the need for separate alignment and mounting operations.
Data Source
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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.