Wing Support Rotation Pin Stress Relief
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Solution Overview
Problem
Current wing supports for farm vehicles, such as tractors, face limitations in steering angle due to wing interference with the tractor's nose, and suffer from premature failure of the rotation pin under bending stresses, leading to reduced durability and efficiency.
Innovation Solution
A support system featuring a first and second attachment element connected by a spiral spring, with a guide element to alleviate bending stresses on the rotation pin, allowing the wing to align with the wheel up to maximum steering angle without interference and maintaining alignment post-interference, utilizing a stop mechanism to lock the second attachment element and a guide element to redirect stresses as tensile or compressive forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the wing is rigidly connected to the wheel support, then the wing and wheel are solidly constrained with respect to rotation about the steering axis, but the wing interferes with the flank of the tractor at maximum steering angle
Solution Approach 1:
The connection between the wing support and wheel support is changed from rigid to dynamic through the introduction of a rotatable second attachment element. This element can rotate about a rotation pin, allowing the wing to dynamically adjust its position relative to the wheel during steering operations, enabling maximum steering angles without wing interference with the tractor flank.
Solution Approach 2:
A second attachment element is introduced as an intermediary between the wing support (first attachment element) and the wheel. This intermediary component, equipped with a rotation pin, mediates the connection by allowing relative rotation, thus resolving the conflict between maintaining constraint stability and achieving full steering range.
2Ease of operation
If the rotation pin connects the first and second attachment elements, then the wing can rotate relative to the wheel, but the rotation pin is subject to considerable bending stresses leading to breakage
Solution Approach 1:
The bending stress problem is resolved by extracting the rotation function from the rotation pin itself. The rotation pin is designed to rotate about its own longitudinal axis rather than承受bending moments, effectively removing the harmful bending stresses that led to premature failure.
Solution Approach 2:
Instead of having the rotation pin resist bending stresses, the design inverts the approach by allowing the pin to freely rotate about its longitudinal axis. This inversion transforms the pin from a load-bearing component subject to bending into a simple rotational hinge, eliminating the bending stress issue.
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 support system enhances resistance and durability by eliminating bending stresses on the rotation pin, allowing for increased operational cycles without failure and maintaining efficient steering performance.
Implementation Method 1
A spiral spring is interposed between the first and the second attachment element so as to rotate the second attachment element elastically towards the first position
Data Source
Figure 1
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Figure 4~5
AI summary
A support for a wing, comprising: a first attachment body (2), predisposed to be constrained to a support (91) of a wheel (90) in such a manner as to be solidly constrained to the wheel with respect to the rotation about a steering axis (ST); a second attachment body (31, 32), predisposed to be connected to a wing (100), and rotatably connected to the first attachment body (2) about a main rotation axis (X), parallel to the steering axis (ST), by means of a rotation pin (4); said first attachment body (2) being rotatable with respect to the second attachment body (31, 32) between an initial position and a final position that are spaced one from the other by a given angular pitch with respect to the main rotation axis (X); a guide element (6) that is solidly constrained to the first attachment body (2) and to the second attachment body (31, 32) with respect to the translation parallel to the main rotation axis (X), and it is slidable with respect to the first attachment body and/or to the second attachment body along a circular arc trajectory (T) concentric to the main rotation axis (X).