Replaceable Furrow Opener Tip with Retainer Member
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Solution Overview
Problem
Existing furrow openers experience stress and wear due to the forces applied by the ground during furrow formation, particularly at the connection between the tip and opener bodies, and debris can become trapped, leading to inefficiencies in furrow formation.
Innovation Solution
A furrow opener design featuring a retainer member above the usual socket and pin connection to secure the tip body against twisting forces and prevent debris entry, with a tip body configuration that includes a rear connecting portion, a furrowing portion, and a guard portion, and a method for mounting the tip body using a retainer member to enhance stability and reduce wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If a replaceable tip is mounted on the opener body using a transverse pin connection, then the tip can be easily replaced and selected, but the pin connection experiences considerable stress and may fail under ground forces
Solution Approach 1:
The tip body is divided into two functional segments: a rear connecting portion for attachment to the opener body, and a furrowing portion for ground engagement. This segmentation allows the tip to be replaced while maintaining structural integrity during operation, as each portion performs its specific function independently.
Solution Approach 2:
The retainer member is positioned at the top end of the tip body, adding a vertical dimension to the retention system. This upper retainer member works in conjunction with the lower pin connection to provide multi-point restraint, distributing stresses across multiple locations rather than relying on a single connection point.
2Strength
If the tip body is made elongate to protect the opener body, then wear resistance is improved, but debris can become trapped between the tip body and opener body causing further wear
Solution Approach 1:
The retainer member acts as an intermediary element between the tip body and opener body. It provides a controlled interface that prevents debris from becoming trapped in the gap between these components, while still allowing the elongate tip body to protect the opener body during operation.
3Productivity
If the top end of the tip body is pulled forwardly during furrow formation, then the tip engages the ground effectively, but twisting forces are applied to the connection between the tip body and opener body
Solution Approach 1:
The retainer member is positioned in advance at the top end of the tip body to counteract twisting forces before they can damage the connection. This preventive measure cushions against the stresses generated during effective ground engagement, maintaining connection stability while allowing productive furrow formation.
Data Source
AI summary
A furrow opener comprises an opener body including a shank mount arranged to support the opener body on an agricultural implement shank for movement in a forward working direction and a tip body readily separable from the opener body and arranged for forming a furrow in the ground in the working direction. The tip body includes a furrowing portion extending downwardly and forwardly beyond the opener body so as to be arranged to form the furrow in the ground. A retainer member is supported on the opener body to retain a portion of the tip body adjacent the top end thereof on the opener body to provide support to the tip body against a moment acting on the tip body from the rearward force on the furrowing portion during furrow formation.