Rear Spoiler Device with Coupling Rod for Lorry Door Clearance
Solution Overview
Problem
Existing rear spoiler devices for vehicles with box-shaped structures often hinder the full opening of rear doors due to bulky folding mechanisms and complex adjustment systems, leading to unfavorable aerodynamics and increased installation costs.
Innovation Solution
A rear spoiler device featuring a coupling device that connects a vertically adjustable roof air guide element with a laterally or horizontally adjustable side air guide element, using a coupling rod with articulation points to allow for adjustable movements, enabling the roof air guide element to be actively adjusted while the side air guide element is adjusted passively, thus covering the free space between them and forming a closed surface to prevent turbulence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a rear spoiler device is attached to the rear door with folding mechanisms, then aerodynamic properties are improved, but the rear door cannot be fully opened by 250° due to bulky folding structures
Solution Approach 1:
The rear spoiler device is divided into separate components: a roof air guide element and a side air guide element, which can be independently positioned. This segmentation allows the spoiler to be detached from the door hinge area, enabling full 250° door opening while maintaining aerodynamic functionality when deployed.
Solution Approach 2:
The adjustment mechanism utilizes vertical movement of the roof air guide element to control the positioning of the side air guide element through a coupling rod. This dimensional approach allows compact storage and full door opening while enabling aerodynamic deployment through vertical adjustment.
2Object-affected harmful factors
If complex adjustment systems are used for the rear spoiler device, then aerodynamic performance is improved, but device complexity and installation costs increase
Solution Approach 1:
The coupling device automatically positions the side air guide element based on the vertical position of the roof air guide element. This self-adjusting mechanism eliminates the need for complex independent adjustment systems for both elements, reducing overall system complexity while maintaining aerodynamic performance.
Solution Approach 2:
A coupling rod serves as an intermediary mechanism between the roof air guide element and the side air guide element. This simple mechanical linkage translates vertical movement of the roof element into appropriate positioning of the side element, providing aerodynamic adjustment without complex control systems.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a rear spoiler device (8) for a lorry (1), which comprises: a roof air-deflector element (10) which can be adjusted between a driving position for aerodynamically extending the contour of a roof surface (5) of the lorry and a retracted base position resting against or behind a rear door (6); a lateral air-deflector element (12), which can be shifted between a driving position for extending the contour of a lateral wall (4) of the lorry (1) and a retracted base position resting against or behind the rear door; and a coupling device (15) for coupling the shifting movements of the air-deflector elements. According to the invention: the coupling device (15) is provided between a lateral edge (10c) of the roof air-deflector element (10) and an upper edge (12c) of the lateral air-deflector element (12) and connects said two edges to each other; the coupling device has a coupling rod (15b) which is attached between a rear outer corner region (10bc) of the roof air-deflector element (10) and an upper rear corner region (12bc) of the lateral air-deflector (12) and which couples the shifting movements of the corner regions to each other; and the roof air-deflector element (10) is arranged so that it can shift by means of a roof hinge device (11) such that the front edge (10a) of said element is designed to rest against the lorry (1) in the driving position and is pivoted downwards in the base position.