Vehicle Rear Spoiler Four-Bar Coupling Mechanism
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Solution Overview
Problem
Existing rear spoiler devices for vehicles with box-like structures and rear doors are complex, difficult to operate, and often impair the pivoting-open operation of rear doors due to intricate hinge connections, leading to issues like jamming, wobbling, and imprecise adjustments.
Innovation Solution
A coupling device that securely connects the side air guiding element and the roof air guiding element through a pressure-resistant and tension-resistant mechanism, utilizing a four-bar coupling with parallel and offset articulation axes, allowing for precise and easy adjustment between travel and basic positions without folding lines, and supported by gravitational and resilient forces for stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If folding mechanisms with rod assemblies and crank handles are used to retract air guiding elements, then the rear spoiler device can be compact in the basic position, but the operation becomes difficult and the weight increases
Solution Approach 1:
The air guiding elements are designed to fold and extend automatically based on the position of the rear doors. When the rear doors are opened, the air guiding elements automatically extend to the travel position; when the rear doors are closed, they automatically retract to the basic position. This eliminates the need for manual operating mechanisms like crank handles, significantly improving ease of operation while maintaining compact storage space.
2Strength
If complex hinge connections are used to connect air guiding elements to rear doors, then the air guiding elements can be securely attached, but the pivoting-open operation of rear doors is impaired and jamming occurs
Solution Approach 1:
The air guiding elements are divided into separate components (side air guiding elements and roof air guiding element) that can independently move. Each element is connected to the rear door through simplified hinge mechanisms that allow smooth pivoting without interference. This segmentation enables secure attachment while maintaining unimpaired door opening operation and preventing jamming.
3Measurement precision
If additional handling devices like crank handles are added to adjust air guiding elements, then the adjustment can be controlled, but the overall weight and costs increase
Solution Approach 1:
The air guiding elements automatically adjust their positions based on the door position without requiring additional handling devices. The side air guiding elements and roof air guiding element move automatically to the appropriate travel or basic position, eliminating the need for crank handles or other manual adjustment mechanisms. This reduces the overall weight and cost while maintaining precise adjustment through the automatic coupling mechanism.
4Adaptability or versatility
If adjustment mechanisms are added to move air guiding elements, then the aerodynamic optimization can be achieved, but the device complexity increases and wobbling occurs
Solution Approach 1:
The adjustment mechanism is merged with the door opening/closing mechanism itself. The air guiding elements are coupled to the rear doors through hinge connections that automatically adjust the air guiding elements' positions as the doors move. This integration eliminates the need for separate adjustment mechanisms, reducing device complexity and preventing wobbling while maintaining aerodynamic optimization capability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution simplifies the operation and enhances stability, reducing wobbling and friction losses, enabling precise adjustment with lower operational force and allowing for independent access to rear doors without disrupting their opening, while maintaining structural integrity and aerodynamic efficiency.
Implementation Method 1
direct support of the roof air guiding element on the side air guiding element is also possible so that a coupling which is supported by gravitational force
Implementation Method 2
a coupling which is supported by gravitational force and which is preferably also resiliently loaded
Data Source
AI summary
A rear spoiler device for a vehicle with at least one rear door has a side air guiding element which can be adjusted between a retracted basic position and a travel position for contour extension and aerodynamic air guiding, a roof air guiding element which can be adjusted between a basic position and a travel position for contour extension and aerodynamic air guiding, and a coupling device for coupling the adjustment movements of the side air guiding element and the roof air guiding element. The coupling device is provided between a lower side of the roof air guiding element and an upper end of the side air guiding element. The upper end of the side air guiding element can be adjusted along the lower side of the roof air guiding element during the adjustment movement.