Corn Header Tensioning Sprocket Flange for Anti-Disengagement
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Solution Overview
Problem
Conventional tensioning sprockets in corn headers are prone to disengage due to upward forces exerted by lifting chains, leading to misalignment and potential damage, as they lack sufficient upward movement prevention mechanisms in their design.
Innovation Solution
The tensioning sprocket incorporates a continuous circumferential flange on its lower face to replace point deformations, providing a stable anchorage and preventing axial movement between the sprocket and bearing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If point plastic deformations (annular embossment) are used to prevent upward movement of the sprocket, then the sprocket is blocked from moving upwards and disengaging from the bearing, but the assembly complexity increases and manufacturing precision requirements increase
Solution Approach 1:
The annular embossment is segmented into multiple point plastic deformations distributed along a circumference on the lower face of the sprocket. This segmentation provides effective upward movement prevention while maintaining simpler manufacturing compared to a continuous embossed ring, as point deformations can be created through standard punching or forming operations.
Solution Approach 2:
Instead of adding a separate retaining ring or blocking mechanism on the upper face of the sprocket (the conventional approach), the invention inverts the blocking mechanism to the lower face by creating point plastic deformations that protrude upward. This inverted approach prevents disengagement while simplifying the overall structure by eliminating the need for additional retaining components.
2Ease of manufacture
If a continuous circumferential flange is used instead of point deformations, then manufacturing is simplified and assembly efficiency is enhanced, but the precision of anchorage may be reduced
Solution Approach 1:
The invention merges the blocking function with the bearing mounting surface by creating a continuous circumferential flange on the lower face of the sprocket. This flange integrates the anchorage function into the sprocket body itself, eliminating the need for separate retaining components and simplifying manufacturing while maintaining sufficient precision through the continuous contact surface with the bearing.
3Device complexity
If no upward blocking mechanism is provided, then the sprocket design is simpler, but the lifting chains can disengage the sprocket causing misalignment and damage
Solution Approach 1:
The invention applies preliminary anti-action by providing an upward blocking mechanism (either point plastic deformations or continuous flange) that prevents the harmful upward movement of the sprocket before it can occur. This preliminary prevention eliminates the risk of chain disengagement, misalignment, and potential damage to the drive box while maintaining relative structural simplicity.
Data Source
AI summary
A tensioning sprocket designed to be mounted on the frame or row of a corn header of the type consisting of a control box (8) on which two drive gears (6) and (7) are mounted that generate the linear movement at the lifting chains (1) and (2), which maintain their adequate tension by action of the pair of tensioning sprockets (9) and (10) that are arranged on respective bearings (12) mounted on the appropriate carrier arms (11), wherein each tensioning sprocket includes an annular step (16) adjacent to its upper face; wherein each tensioning sprocket includes a annular embossment that defines a continuous circumferential line (17).