Releasable Chassis Mount with Fracture Sleeve
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Solution Overview
Problem
Vehicles subjected to external forces require a mechanism to release the chassis from the body structure without adding mass or altering the assembly process.
Innovation Solution
A releasable chassis mount comprising an outer sleeve, a cylindrical insert, and a chassis bolt, where the outer sleeve has a mount release feature, such as a notch, enabling the separation of the chassis from the body structure during external forces by initiating a fracture or deformation, allowing the cylindrical insert to be released from the sleeve.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a releasable chassis mount mechanism is added to enable chassis separation during external force, then vehicle safety is improved, but vehicle mass increases
Solution Approach 1:
The chassis mount is divided into separable components: an outer sleeve attached to the chassis and a cylindrical insert attached to the body structure. These segments remain connected during normal operation but can separate when needed, allowing the system to provide safety functionality without requiring a completely separate release mechanism
Solution Approach 2:
The mount release feature (notch) is pre-formed in the outer sleeve during manufacturing. This preliminary structural preparation enables the release mechanism to activate automatically during external force events without requiring additional actuators, sensors, or control systems that would increase vehicle mass
2Reliability
If a releasable chassis mount mechanism is added to enable chassis separation during external force, then vehicle safety is improved, but the vehicle assembly process becomes more complex
Solution Approach 1:
The mount components (outer sleeve and cylindrical insert) are designed as separate assemblies that can be manufactured independently using standard processes. The outer sleeve is attached to the chassis and the cylindrical insert to the body structure using existing attachment methods, allowing these components to be integrated into the vehicle assembly process without requiring new manufacturing procedures
Solution Approach 2:
The mount release feature is designed to automatically activate during external force events without requiring external control systems, actuators, or complex triggering mechanisms. This self-activating design simplifies the assembly process by eliminating the need to install and calibrate additional control components
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
Enables the separation of the chassis from the body structure when subjected to external forces without adding mass or changing the vehicle assembly process, ensuring safety and structural integrity.
Implementation Method 1
The cylindrical insert is in an interference fit relationship with the outer sleeve
Implementation Method 2
The mount release feature is configured to initiate release of the cylindrical insert from the outer sleeve during such external force
Data Source
AI summary
A releasable chassis mount for a vehicle having a body structure and a chassis and subjectable to an external force includes an outer sleeve, a cylindrical insert, and a chassis bolt. The outer sleeve is attachable to the chassis and has a mount release feature. The cylindrical insert is in an interference fit relationship with the outer sleeve and defines a hole. The chassis bolt extends through the hole for attaching the cylindrical insert to the body structure. The mount release feature is configured to initiate release of the cylindrical insert from the outer sleeve during such external force, whereby to enable the separation of the chassis from the body structure.