Flag-Type Side Mirror Mounting With Closed Door Section Rigidity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional flag-type side mirrors on vehicle door panels suffer from vibration issues due to an open cross-sectional structure, leading to reduced rigidity and increased weight, and pose challenges during assembly with fastening nuts falling easily.
Innovation Solution
A structure and method for mounting the flag-type side mirror with a mirror neck fastened to a door panel, where the panel is circumferentially bonded to another panel, and the quadrant reinforce is bonded to both the inner and outer panels, creating a closed cross-sectional structure for improved rigidity and allowing internal fastening to prevent nut loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the side mirror is fastened to an open cross-sectional structure, then the assembly is simple, but the rigidity is insufficient and vibration occurs
Solution Approach 1:
The door panel is divided into multiple segments (outer panel, inner panel, and intermediate panel) that are circumferentially bonded together to form a closed cross-sectional structure. This segmentation allows each panel to contribute to the overall rigidity while maintaining assembly simplicity through standardized bonding interfaces.
Solution Approach 2:
Multiple panels (outer panel, inner panel, and intermediate panel) are merged through circumferential bonding to form a unified closed cross-sectional structure. This merging creates a rigid framework that supports the mirror neck while eliminating vibration issues associated with open structures.
2Strength
If the panel thickness is increased to improve rigidity, then the structural strength increases, but the weight increases
Solution Approach 1:
The door panel is segmented into multiple thin panels (outer panel, inner panel, and intermediate panel) that are circumferentially bonded together. This segmentation allows the structure to achieve high rigidity through the closed cross-sectional configuration rather than relying on increased thickness, thereby reducing weight.
Solution Approach 2:
The door assembly uses a composite structure consisting of multiple panels bonded together with a mirror neck fastened between them. This composite construction provides enhanced rigidity through the closed cross-sectional geometry while maintaining lightweight individual panel components.
3Ease of operation
If the fastening bolt is fastened from the outside of the vehicle, then the assembly process is straightforward, but the fastening nut may fall and be lost
Solution Approach 1:
The fastening operation is inverted by fastening the mirror neck from the inside of the door rather than from the outside. The fastening bolt passes through the intermediate panel and outer panel to secure the mirror neck, with the fastening nut retained inside the closed cross-sectional structure. This inversion prevents the nut from falling out while maintaining assembly ease through accessible fastening points.
4Strength
If additional brackets and covers are added to improve structural integrity, then the rigidity increases, but the number of parts increases and weight increases
Solution Approach 1:
The structural integrity function is merged into the door panel itself by forming a closed cross-sectional structure using the outer panel, inner panel, and intermediate panel. This eliminates the need for additional separate brackets and covers, reducing the number of parts while maintaining structural strength.
Solution Approach 2:
The intermediate panel serves multiple functions: it provides structural support, forms part of the closed cross-sectional rigid framework, and acts as a mounting surface for the mirror neck. This multi-functionality eliminates the need for separate brackets, reducing part count while maintaining structural integrity.
Data Source
AI summary
A structure and method for mounting a flag-type side mirror securely fastens the flag-type side mirror on a door panel of a vehicle. The method includes: passing a wiring mounted to the flag-type side mirror through through-holes formed in an outer belt rail, a quadrant reinforce, and an inner panel of the door; placing the flag-type side mirror at a position to be installed; arranging a mirror neck of the flag-type side mirror to abut on the quadrant reinforce through an outer panel of the door; passing a fastening member through the outer belt rail and the quadrant reinforce; and fastening the fastening member to an end of the mirror neck by operating a tool in a direction from inside to outside of the vehicle.