Cabin Skylight Frame Layout Around Roof Air Ducts
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Solution Overview
Problem
Conventional work vehicles with air conditioning units have reduced visibility and ventilation due to the narrow space required for skylights, as the air conditioning ducts occupy a significant portion of the roof, limiting the size of the skylight.
Innovation Solution
A work vehicle design featuring a skylight frame with a first frame portion behind the air conditioning duct and a second frame portion that overlaps the duct in the front-rear direction, allowing for a larger skylight opening and improved visibility and ventilation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an air conditioning duct is installed in the front portion of the roof, then conditioned air can be discharged to the driver's seat, but the space for the skylight becomes narrow and visibility is reduced
Solution Approach 1:
The skylight frame extends in the front-rear direction to overlap with the air conditioning duct, utilizing the third dimension (depth) to compensate for the loss of skylight area. This allows the skylight to maintain sufficient area despite the duct occupying roof space.
Solution Approach 2:
The skylight frame is divided into a first frame portion (behind the duct) and a second frame portion (overlapping the duct), allowing the skylight to be positioned in multiple locations to optimize both air conditioning discharge and visibility.
2Ease of manufacture
If the skylight area is reduced to accommodate the air conditioning duct, then space is saved for the duct installation, but ventilation amount and daylight amount are reduced
Solution Approach 1:
By extending the skylight frame in the front-rear direction to overlap with the duct, the skylight maintains adequate area for ventilation and daylighting while accommodating the duct in the roof structure.
Solution Approach 2:
The skylight frame is positioned with specific portions overlapping the duct and other portions behind it, creating localized optimization where the skylight area is preserved in regions not occupied by the duct.
Data Source
AI summary
[Problem] The present invention provides a work vehicle capable of sufficiently securing visibility of a skylight regardless of installation of an air conditioning unit in a cabin.[Solution] A tractor 1 includes a work vehicle including a cabin 12 having a driver's seat 30 includes: a skylight 52 disposed in a roof portion 42 of the cabin 12; and an air conditioning duct front portion 49b disposed in a front portion of the roof portion 42, wherein a skylight frame 53 opened to the skylight 52 includes a first frame portion 53a provided behind the duct front portion 49b, and a second frame portion 53b continuous from the first frame portion in a region that at least partially overlaps the duct front portion 49b in a front-rear direction and in which the duct front portion 49b is not disposed in a plan view.