Adapter Bushing Pin Retention for Furrowing Tip Seizure
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Solution Overview
Problem
The existing furrowing opener systems face issues with threaded connections seizing due to exposure to elements, making it difficult to replace the tip body, and require tight manufacturing tolerances for secure positioning, which is costly and challenging.
Innovation Solution
An adapter bushing with a cooperating aperture that receives a retainer pin by interference fit, allowing for secure attachment of the tip body to the shank body without seizing and accommodating a wider range of manufacturing tolerances, featuring a radial slot for compression and a C-shaped cross-section for retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a threaded connection (bolt and nut) is used to secure the tip body to the shank body, then the tip body can be retained on the opener body, but the threaded connection becomes seized due to exposure to elements, making it difficult to replace the tip body
Solution Approach 1:
The patent extracts the threaded connection (bolt and nut) from the system and replaces it with a pin-based retention mechanism. The tip body is secured using a pin that fits into a transverse opening in the shank body and a transverse aperture in the tip body, eliminating the threaded components that are prone to seizing from exposure to elements.
Solution Approach 2:
The patent replaces the threaded mechanical connection system with a simpler pin-and-opening mechanical system. This substitution eliminates the complexity of threads and the associated problem of seizing, while maintaining secure retention of the tip body on the shank body.
2Reliability
If a square nut is used with close tolerances to securely position the tip body, then the tip body is securely retained, but manufacturing becomes difficult and costly
Solution Approach 1:
The patent changes the dimensional parameters and tolerance requirements of the retention system. Instead of requiring close tolerances on a square nut and its mating opening, the design uses a pin with standard tolerances that fits into a transverse opening and aperture. This parameter change allows for easier and less costly manufacturing while maintaining secure positioning of the tip body.
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 adapter bushing enables secure, replaceable tip body attachment without thread seizing and simplifies manufacturing by allowing greater tolerance ranges, reducing costs and complexity.
Implementation Method 1
an adapter bushing which receives a retainer pin by interference fit through co-operating apertures in the adapter bushing and a furrowing tip
Data Source
AI summary
An adapter bushing is supported on a furrowing opener of an agricultural implement. The adapter bushing includes a bushing body received by interference fit within a transverse opening in a shank body of the furrowing opener. A cooperating aperture is formed in the bushing body so as to be arranged for alignment with a corresponding pin receiving aperture of a replacement tip body of the furrowing opening such that a retainer pin is arranged to be received simultaneously within the cooperating aperture of the adapter bushing and the pin receiving aperture of the tip body.