Vehicle Lid Drive Tie-Up Point Reinforcement
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Solution Overview
Problem
Existing body-side tie-up points for vehicle lid drives lack the necessary rigidity and fatigue strength to effectively transmit high forces and absorb torque, leading to instability and reduced durability under load.
Innovation Solution
A body-side tie-up point design featuring a sealing duct with an inner and outer reinforcing plate, a strengthening element that spans across the duct, and a bush for indirect support, allowing for spaced-apart support and enhanced stability, thereby absorbing high forces and torques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a simple tie-up point structure is used, then the device complexity is reduced, but the strength and rigidity to transmit high forces are insufficient
Solution Approach 1:
The tie-up point employs a composite structure combining multiple materials and components: a sealing duct (flexible element), inner and outer reinforcing plates (rigid elements), and a strengthening element (structural connector). This composite construction achieves high strength and rigidity while distributing mechanical loads across different material properties, resolving the contradiction between strength requirements and structural simplicity.
Solution Approach 2:
The tie-up point is segmented into distinct functional components: the sealing duct for flexibility and sealing, inner reinforcing plates for structural support, outer reinforcing plates for additional strength, and a strengthening element for load distribution. This segmentation allows each component to be optimized for its specific function while collectively achieving the required overall strength without excessive complexity.
2Reliability
If a single-point support structure is used, then the device complexity is reduced, but the fatigue strength and durability under cyclic loads are insufficient
Solution Approach 1:
The support structure transitions from a single-point support to a distributed multi-point support system. The strengthening element is supported at multiple locations (first support point on the sealing duct, second support point on the outer reinforcing plate) along its length, creating a dimensional expansion from point to line support. This dimensional change distributes cyclic loads across multiple support points, significantly improving fatigue strength and durability while maintaining reasonable structural complexity.
3Force
If a rigid tie-up point structure is used, then the force transmission capability is improved, but the ability to absorb torque and lateral loads is insufficient
Solution Approach 1:
Different components of the tie-up point possess different local qualities optimized for specific load types: the sealing duct provides flexibility and sealing properties, the inner reinforcing plates provide rigid structural support for force transmission, the outer reinforcing plates add torsional rigidity, and the strengthening element connects these components to distribute both linear forces and torques. This local differentiation of properties enables the structure to simultaneously handle force transmission and torque absorption effectively.
Data Source
AI summary
A body-side tie-up point for a drive of a lid for a body aperture of a vehicle. The tie-up point has an inner reinforcing plate which is fastened on the outside to a sealing duct laterally adjacent to the body aperture, and an outer reinforcing plate which is fastened to the inner reinforcing plate on a side facing away from the sealing duct. A strengthening element is provided which bears against the sealing duct and the inner reinforcing plate in a contact zone on a side facing away from the inner reinforcing plate. The outer reinforcing plate directly or indirectly supports the strengthening element in a region spaced apart from the contact zone.