Cab-Over Truck Headlight Adjustment Access via Washer Cap
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Solution Overview
Problem
Adjusting the vertical and horizontal positions of the high beam and low beam in a cab-over engine truck is laborious due to the displacement of the driver cabin's center of gravity when tilted, making it difficult to access the adjustment members through service caps in the side walls.
Innovation Solution
An adjustment mechanism access opening is positioned adjacent to the headlight unit, allowing easy access to the adjustment mechanism ends, with flexible cables or rods connecting these ends to the adjustment mechanism, and the headlight washer cap can be deactivated to provide unobstructed access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If service caps are provided in side walls to access adjustment members, then access to adjustment mechanism is possible, but the operation becomes laborious and difficult for the operator
Solution Approach 1:
The patent combines the adjustment mechanism access opening with the headlight washer cap, merging two separate access functions into a single integrated structure. The headlight washer cap serves dual purposes: protecting the headlight washer and providing access to the adjustment mechanism, thereby eliminating the need for separate service caps in side walls and simplifying the overall structure while improving operator accessibility
Solution Approach 2:
The patent repositions the access opening from the side wall dimension to the front dimension by utilizing the headlight washer cap location. This dimensional shift allows the operator to access the adjustment mechanism from the front of the vehicle, which is more accessible and ergonomic, rather than reaching into side wall service caps
2Ease of operation
If the cabin part is tilted to allow access to the engine compartment, then engine access is enabled, but the center of gravity displacement prevents adjustment of beam positions
Solution Approach 1:
The patent positions the adjustment mechanism and its access opening in a location that remains accessible and functional regardless of the cabin's tilted position. By placing the adjustment mechanism ends and access opening at the front of the chassis near the headlight unit, the system allows beam adjustment to be performed before or after engine compartment access without requiring the cabin to be in a specific orientation, thereby maintaining beam position accuracy independent of cabin tilt
3Ease of operation
If a separate adjustment mechanism access opening is provided, then access to adjustment members is improved, but the device complexity and number of components increases
Solution Approach 1:
The patent merges the adjustment mechanism access opening function with the existing headlight washer cap structure. This integration eliminates the need for a separate, dedicated access opening while maintaining full accessibility to the adjustment mechanism, thereby reducing the total number of components and simplifying the vehicle's front-end structure
Solution Approach 2:
The headlight washer cap is designed to serve multiple functions: it protects the headlight washer from debris, provides access to the headlight washer for maintenance, and simultaneously serves as the access opening for the adjustment mechanism. This multi-functionality reduces the need for separate access points and simplifies the overall design
Data Source
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AI summary
A cab-over engine truck has a front side, a chassis, an engine compartment and a driver cabin at least partially positioned over the engine compartment. The driver cabin includes an cabin part that is tiltable with regard to the chassis to allow access to the engine compartment by being hinged about a horizontal axis arranged at the front side and a chassis part that remains associated with the chassis when the cabin part is tilted. The chassis part and/or cabin part has a front section carrying a headlight unit for producing a high beam and/or a low beam. The headlight unit comprises a vertical positioning adjustment member for adjusting the vertical position of the high beam and/or a low beam and a horizontal positioning adjustment member for adjusting the horizontal position of the high beam and/or a low beam. The cab-over engine truck comprises an adjustment mechanism with first ends engaging the vertical positioning adjustment member and the horizontal positioning adjustment member and second ends for being operated by an operator. The front side of the chassis part and/or cabin part comprises an adjustment mechanism access opening for allowing access to the second ends of the adjustment mechanism.