Rear Post Opening for Door Stop Rod in Motor Vehicle
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Solution Overview
Problem
Existing vehicle body structures for rear hinged doors are inadequate for installing a door stop mechanism in small utility vehicles, as they either require reducing the mechanism's dimensions to save manufacturing costs or placing parts outside the vehicle, which compromises loading capacity.
Innovation Solution
Designing an improved body structure with a rear foot that includes an opening for the door stop mechanism's rod to exit into a free space above the wheel arch area, allowing the rod to be housed within the vehicle without reducing loading capacity, and incorporating features like air extraction openings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the door stop mechanism is placed outside the vehicle body, then the mechanism can be installed without modifying the body structure, but the vehicle loading capacity is reduced due to intrusion into the vehicle trunk
Solution Approach 1:
The door stop mechanism rod is nested within the vehicle body structure by routing it through a channel formed in the rear foot and wheel arch area. The rod passes through a opening in the rear foot and is contained within a defined space above the wheel arch, effectively hiding the mechanism inside the vehicle body without protruding into the trunk space.
Solution Approach 2:
The rod is positioned in a three-dimensional space above the wheel arch area rather than in the traditional horizontal plane of the rear foot. This vertical positioning utilizes unused space in the body structure, allowing the mechanism to be housed within the vehicle body without compromising trunk loading capacity.
2Adaptability or versatility
If the rear foot section is made smaller to accommodate the rod, then the door stop mechanism can be installed, but the manufacturing cost increases due to additional manufacturing steps
Solution Approach 1:
The opening in the rear foot serves dual purposes: it allows the door stop mechanism rod to pass through and emerge into the free space above the wheel arch, and it also functions as an air extraction opening for the vehicle's ventilation system. This multi-functionality eliminates the need for separate openings and reduces manufacturing complexity.
Solution Approach 2:
The air extraction function is merged with the door stop mechanism opening. The same opening in the rear foot that accommodates the rod also serves as an air extraction opening, combining two functional requirements into a single structural feature and avoiding additional manufacturing steps.
3Volume of moving object
If the rod dimensions are reduced to fit within the rear pillar, then the mechanism can be installed in small utility vehicles, but the manufacturing cost increases
Solution Approach 1:
Instead of reducing the rod dimensions to fit within the constrained rear pillar space, the rod is routed through the rear foot opening and positioned in the three-dimensional space above the wheel arch area. This dimensional relocation allows the rod to maintain its standard dimensions while still accommodating the door stop mechanism in small utility vehicles.
Data Source
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AI summary
Vehicle, particularly a motor vehicle, comprising an improved bodywork structure for fitting a door stop mechanism (10) for a pivoting rear door (20), the said structure comprising a rear post and the said door (20) collaborating with a door stop mechanism (10) which comprises a rod (11) attached to the door and of which the free end (11a) - or stop - by jamming against the rear post, defines the wide open position of the door (20), characterized in that the said structure has an opening (6) formed in the rear post so that the rod (11) can come out of the said rear post, so as to allow the rod (11) to emerge into an empty space (E) located above the wheel arch region (P).