Segmented Roller Door for Skid Steer Cab Access
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Solution Overview
Problem
Conventional skid steer operator cabs face challenges with limited interior space and visual obstructions due to folding or translatable doors, which restrict operator access and visibility.
Innovation Solution
A segmented door with a roller assembly that rolls up to open, allowing for unobstructed ingress and egress, and providing a rigid barrier when closed, utilizing a frame with opposing side and roof panels and an actuator-driven spool system for controlled movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a folding or translatable door is used, then the operator can enter and exit the cab, but the door creates visual obstructions and cramps operations inside the small cab
Solution Approach 1:
The door is repositioned from the front of the cab to the side of the cab, changing the spatial dimension of access. This side-mounted configuration allows the door to open outward away from the cab interior, eliminating visual obstructions for the operator while maintaining ease of entry and exit. The door moves along a track system that guides it from a closed position overlapping the cab opening to an open position extended laterally away from the cab.
2Ease of operation
If a pivoting swing-out front door panel is used, then the operator can enter and exit the small interior space, but the door configuration restricts operations inside the cab
Solution Approach 1:
The door system employs a dynamic track-based mechanism that allows the door to move laterally along a guide track rather than pivoting on fixed hinges. This dynamic configuration enables the door to sweep open along the side of the cab, providing unobstructed access while reducing mechanical complexity compared to traditional swing-out mechanisms. The track system with rollers provides smooth, controlled movement without requiring complex hinge assemblies or counterbalance mechanisms.
3Ease of operation
If the door opens into the interior space of the cabin, then the operator can access the cab, but it further cramps operations inside the small cab
Solution Approach 1:
The door opening path is extracted from the cab interior space and relocated to the exterior side of the cab. The door opens laterally along the side of the cab rather than inward, completely removing the door's movement path from the limited cab interior volume. This extraction principle ensures that the door mechanism and its range of motion do not encroach upon the operator's working space within the cab, maximizing the available interior volume for operations.
Data Source
AI summary
An operator cab mounted on a chassis of a mobile work vehicle. The cab comprised of a frame supporting a back panel, a pair of opposing side panels, and a roof panel, wherein the side panels and the roof panel each have a first edge proximate the back panel and a second edge opposite the first edge, the second edges defining a door opening. A door proximate the door opening, the door movable to a closed position or an open position and defining a front barrier when in the closed position. A roller assembly positioned proximate the roof panel and connected to the door, wherein the door is moved about the roller assembly to an open position from the closed position, allowing for an operator to ingress and egress through door opening.