Detachable Whitebody Interface for Fast Crash Sled Replacement
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Solution Overview
Problem
Existing methods for attaching a vehicle body-in-white (whitebody) to a sled base for crash testing are laborious and time-consuming, necessitating frequent replacement due to deformation during testing.
Innovation Solution
A detachable interface system comprising sled and body brackets, along with braces and bearing members, allows for rapid connection and disconnection of the whitebody to the sled base, absorbing forward momentum during testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If existing welding methods are used to attach the whitebody to the sled base, then the connection is strong and stable, but the attachment and removal process is laborious and time-consuming
Solution Approach 1:
The interface is divided into multiple detachable components including sled brackets, body brackets, and connection elements. This segmentation allows the whitebody to be quickly attached and detached from the sled base without welding, resolving the contradiction between strong connection and quick removal by providing modular, reusable connection points that maintain structural integrity while enabling rapid reconfiguration.
Solution Approach 2:
The interface transitions from a static welded connection to a dynamic detachable connection system. The brackets and connection elements can be assembled and disassembled as needed, allowing the system to adapt between providing strong structural connection during testing and enabling rapid removal for whitebody replacement, thus resolving the time-loss contradiction.
2Reliability
If the whitebody is frequently replaced due to deformation, then testing can continue with undamaged components, but the laborious attachment process reduces productivity
Solution Approach 1:
By segmenting the interface into detachable brackets and connection elements, the system enables rapid replacement of deformed whitebodies with new ones. The standardized connection points allow quick assembly of replacement components, maintaining testing continuity while significantly improving productivity compared to traditional welded attachment methods.
Solution Approach 2:
The detachable interface allows damaged whitebody components to be quickly discarded and replaced with new ones, while the reusable sled brackets and connection elements are recovered and retained for subsequent testing cycles. This approach maintains reliability by ensuring undamaged components are used while improving productivity through rapid component turnover.
3Ease of operation
If a detachable interface is used instead of welding, then removal and replacement is quick and easy, but the connection may lack the strength and stability of welded joints
Solution Approach 1:
The interface is segmented into multiple brackets and connection elements that work together to distribute and bear loads. This segmentation allows each component to be simple and easy to attach while collectively providing the strength and stability needed for crash testing, resolving the contradiction between ease of operation and connection strength.
Solution Approach 2:
Multiple connection elements and brackets are merged into an integrated interface system that combines the advantages of simplicity and strength. The sled brackets, body brackets, and connection elements work together as a unified structure that provides both ease of attachment/removal and the necessary structural integrity for high-stress testing conditions.
Data Source
AI summary
An interface for detachably connecting a vehicle test body to a sled base in a vehicle body assembly includes a sled first bracket connected to the sled base, a sled second bracket connected to the sled base opposite the sled first bracket, a body first bracket connected to the test body and structured to be detachably connectible to the sled first bracket, and a body second bracket connected to the test body and structured to be detachably connectible to the sled second bracket. In some arrangements, the interface also includes a brace connected to the sled base and a bearing member connected to the test body and structured to contact the brace when the test body is detachably connected to the sled base. The interface enables rapid removal of the test body from the sled base and also absorbs forward momentum of the test body during testing.