Vehicle Door Sash Bracket Reinforcement Patch
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Solution Overview
Problem
The attachment strength between the door sash and the bracket in vehicle doors is insufficient due to the shape of the door and the lock device, leading to reduced stiffness and potential door sash movement during high-speed travel.
Innovation Solution
A patch is attached to both the bracket and the door sash, sandwiching the door sash with the bracket to reinforce the attachment and improve stiffness, using welding or alternative joining methods like adhesive or soldering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the door sash and bracket are connected with a standard attachment structure, then the device complexity is reduced and ease of manufacture is improved, but the attachment strength and stiffness become insufficient
Solution Approach 1:
The attachment structure is segmented into three distinct components: the bracket, the door sash, and the patch. The patch acts as a separate reinforcing element that is welded to both the bracket and the door sash, creating a multi-part attachment system that distributes structural loads across multiple connection points rather than relying on a single attachment structure.
Solution Approach 2:
The attachment structure forms a composite assembly by combining the bracket, door sash, and patch into an integrated load-bearing structure. The patch material is welded to both the bracket and door sash, creating a composite structure that leverages the strength of multiple components working together to achieve superior attachment strength compared to individual components alone.
2Strength
If the attachment length between door sash and bracket is increased, then the attachment strength is improved, but the adaptability to door shape and lock device shape is reduced
Solution Approach 1:
The patch is strategically positioned at the specific location where the bracket and door sash meet, concentrating reinforcement exactly where the attachment strength is most needed. This localized approach allows the attachment structure to achieve high strength without requiring increased attachment length elsewhere, thereby maintaining adaptability to various door and lock device shapes.
Solution Approach 2:
Instead of increasing attachment length in the primary attachment direction, the patch adds a new dimensional element by being welded to both the bracket and door sash, creating a triangular reinforcement structure. This dimensional change provides additional attachment strength through a different geometric configuration rather than simply extending the attachment length linearly.
3Ease of manufacture
If the attachment structure is simplified, then the ease of manufacture is improved, but the stiffness of the door sash is reduced
Solution Approach 1:
The patch serves multiple functions simultaneously: it reinforces the attachment strength between the bracket and door sash, increases the stiffness of the door sash, and maintains ease of manufacture through a straightforward welding process. By combining these functions into a single component, the structure achieves enhanced performance without significantly complicating the manufacturing process.
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
Enhances the attachment strength and stiffness of the door sash and bracket, preventing door sash movement during high-speed travel by providing additional reinforcement.
Implementation Method 1
A patch 61 is attached to both the bracket 59 and the door sash 53, sandwiching the door sash 53 with the bracket 59 to reinforce the attachment
Implementation Method 2
a patch, which is joined to the bracket and the door sash and which sandwiches the door sash in cooperation with the bracket, thereby reinforcing the bracket
Data Source
AI summary
This disclosure relates an attachment structure of a door sash of the vehicle door. The vehicle door of this disclosure includes: a door sash; a bracket, which joins the door sash to an inner panel; and a patch, which is joined to the bracket and the door sash and which sandwiches the door sash in cooperation with the bracket, thereby reinforcing the bracket.