Vehicle Door Assembly with Adhesive Gap Adjustment
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Solution Overview
Problem
Conventional vehicle door assembly methods face challenges in achieving consistent and flush panel gaps and effective door seals, as the door mounting needs to be adjusted to match both the rear and front bumpers, leading to compromises in seal gaps that can result in water ingress or increased closing effort.
Innovation Solution
A method involving a chassis structure with intermediate panels and hinged or adhesive attachments to align and position door and body panels precisely, using jig parts for alignment and allowing for adjustments in adhesive fixings to ensure flush and gap consistency, enabling accurate positioning of door seals and panels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the door mounting is adjusted to match the rear bumper or fender, then the panel gap consistency is improved, but the door seal gap becomes compromised leading to water ingress or increased closing effort
Solution Approach 1:
The door assembly is segmented into separate components: the door structure with mounting points, the door outer panel, and the door seal as distinct elements. This allows independent adjustment and optimization of each component's positioning and function, enabling the panel gap and seal gap to be optimized separately rather than as a compromise.
Solution Approach 2:
A door mounting adjustment mechanism serves as an intermediary between the door structure and the body frame, allowing precise control of the door's position relative to both the rear bumper/fender and the door seal. This intermediary adjustment system enables simultaneous optimization of panel gaps and seal effectiveness.
2Reliability
If the door seal gap is reduced to improve sealing, then water ingress is prevented, but the closing effort increases due to over-compression of the seal
Solution Approach 1:
The system allows adjustment of the door mounting position parameters to optimize the seal gap dimension. By changing the mounting position rather than relying on fixed dimensions, the seal gap can be set to the optimal value that provides effective sealing without excessive compression, thereby reducing closing effort while maintaining reliability.
3Strength
If the door structure is fixed rigidly to the chassis, then mechanical strength is improved, but future removal or adjustment becomes difficult
Solution Approach 1:
The door mounting system incorporates adjustable and removable mounting points that transition from a fixed appearance to a dynamically adjustable system. The mounting structure allows the door to be securely fixed during operation for strength, while enabling removal and repositioning for repair or adjustment, combining the benefits of both fixed and flexible mounting.
Data Source
AI summary
A method of assembling a vehicle is disclosed, comprising the steps of (in sequence) providing a chassis structure, affixing a door inner panel to the chassis structure via a hinged attachment, at a location adjacent to a door opening defined by the chassis structure, attaching at least one external body panel to the chassis structure, attaching a door outer panel to the door inner panel via an adhesive fixing. In this way, the door inner panel can be attached in place during the build, at a position tailored to the needs of the seals provided between the door and the chassis structure. Production of the vehicle can continue, and in due course the exterior body panels can be fitted to the chassis structure. The door outer panel can then be attached to the door inner panel, using the tolerance in the adhesive attachment to adjust for panel gap and flushness of fit. The application also relates to a vehicle made in this way.