Work Vehicle Door Hinge Assembly Sag Prevention
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Solution Overview
Problem
Work vehicle doors with hinge assemblies coupled via single openings are prone to sagging due to the weight of the panel, making it difficult for operators to rotate the door from a closed to an open position when obstructed by implements like dozer blades, hindering egress.
Innovation Solution
A hinge assembly design featuring two protrusions extending through separate openings in the panel, with a handle that engages these protrusions to securely couple the panel to the hinge, reducing sagging and enabling quick disengagement for egress, using a single handle to simplify operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the hinge assembly is coupled to the panel via a single opening, then the device complexity is reduced, but the panel sags due to its weight
Solution Approach 1:
The hinge assembly is segmented into two separate protrusions (first protrusion and second protrusion) that extend through separate openings in the panel. This segmentation provides distributed support points along the panel, preventing sagging while maintaining relatively simple individual component designs. Each protrusion independently supports a portion of the panel weight, collectively stabilizing the entire panel.
2Ease of operation
If the door is obstructed by an implement overlapping the door, then the operator cannot rotate the door from closed to open position, but the operator needs to egress quickly
Solution Approach 1:
The hinge assembly incorporates a handle that can be actuated to dynamically change the coupling state between the panel and hinge. The handle moves between an engaged position (where the panel is securely coupled to the hinge and cannot rotate) and a disengaged position (where the panel can be removed). This dynamic capability allows the operator to quickly disengage the panel and egress through the implement obstruction without waiting for the obstruction to clear.
Data Source
AI summary
A hinge assembly for a work vehicle door includes a hinge having a body and a first protrusion. The first protrusion is configured to extend through a first opening in a panel of the work vehicle door, and the first protrusion has a first engagement feature. The hinge assembly also includes a handle having a first corresponding engagement feature configured to engaged the first engagement feature of the first protrusion while the handle is in an engaged position to couple the panel to the hinge. One of the hinge or the handle has a second protrusion, and the other of the hinge or the handle has a recess configured to receive the second protrusion. The second protrusion is configured to extend through a second opening in the panel of the work vehicle door, and the handle is configured to rotate about the second protrusion to the engaged position.