Multi-Branch Connecting Device for Vehicle Sub-Frame Collision Force Distribution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional connecting devices between vehicle sub-frames and bodies often result in inadequate shock absorption during collisions, leading to potential harm as the sub-frame may move into the driver compartment due to insufficient energy absorption and stress concentration.
Innovation Solution
A connecting device with a multi-point rigid connection system, featuring a first end coupled with the vehicle sub-frame and a second end with multiple branches coupled with the vehicle body, distributing collision forces across various directions to enhance rigidity and reduce stress concentration, thereby preventing the sub-frame from invading the driver compartment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a flexible bush is used to connect the sub-frame and vehicle body (one-point connection), then shockproof performance and comfort level are improved, but collision energy absorption is insufficient and the sub-frame may move into the driver compartment
Solution Approach 1:
The connecting device is divided into multiple branches (first branch, second branch, third branch) that connect to different locations on the vehicle body (side member, bottom floor, etc.). This segmentation allows the collision force to be distributed across multiple connection points rather than concentrated at a single point, improving collision energy absorption while maintaining shockproof performance.
Solution Approach 2:
The invention transitions from one-point connection to multi-point connection by adding spatial dimensions to the connection system. The branches extend in different directions and connect to various parts of the vehicle body structure, creating a three-dimensional force distribution network that enhances collision resistance.
2Device complexity
If a one-point connection is used between sub-frame and vehicle body, then the connection structure is simple, but stress concentration occurs during assembly and collision
Solution Approach 1:
The single connection point is segmented into multiple connection points through the branch structure. Each branch connects to a different location on the vehicle body, distributing the stress and avoiding concentration at any single point. This maintains reasonable structural complexity while eliminating stress concentration issues.
3Reliability
If a multi-point rigid connection is used to increase connecting rigidity and reduce stress concentration, then collision force distribution is improved, but the device complexity increases
Solution Approach 1:
Multiple connection functions are merged into a single integrated connecting device. The first end couples with the sub-frame while the second end branches out to connect with multiple locations on the vehicle body simultaneously. This merging approach achieves multi-point rigid connection with a unified structure, balancing reliability improvement with controlled complexity.
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A connecting device for connecting a vehicle sub-frame (10) and a vehicle body (20) and a vehicle comprising the connecting device are provided. The connecting device comprises a first end (100) adapted to couple with the vehicle sub-frame (10), and a second end (200) adapted to couple with the vehicle body (20), and the second end (200) has at least one first branch (201 ) adapted to couple with a side member (21) of the vehicle body (20) and at least one second branch (202) adapted to couple with a bottom floor (22) of the vehicle body (20).