Vehicle Body Structure Damper Base Load Distribution
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Solution Overview
Problem
Existing vehicle body structures face challenges in efficiently transmitting and distributing load from damper bases to rear side frames while minimizing component increase and weight, particularly when the cross member is offset.
Innovation Solution
The proposed vehicle body structure includes a damper base with inward and outward projecting beads, a gusset with overlapping beads for reinforcement, and a damper-base stiffener, which effectively transfers and absorbs load to the rear side frames, and optionally incorporates a reinforcing member and connection to a roof side rail.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the cross member is offset frontward from the damper bases, then the vehicle body structure can achieve better load distribution, but it becomes difficult to transmit the load from the damper bases only to the cross member
Solution Approach 1:
The patent introduces a gusset as an intermediary component between the damper base and the cross member. The gusset includes a third bead that overlaps with the first bead of the damper base, creating an intermediate load transmission path that facilitates effective load distribution when the cross member is offset from the damper bases.
2Strength
If the strength of the damper bases and connecting portions is increased, then the load transmission reliability is improved, but the number of components and weight increase
Solution Approach 1:
The patent merges the reinforcing function into the gusset component itself by forming a third bead that overlaps with the first bead of the damper base. This integration provides structural reinforcement and increases connection strength without requiring separate reinforcing components, thereby avoiding excessive weight increase.
Solution Approach 2:
The patent utilizes the dimensional overlap of beads in the vehicle width direction to enhance connection strength. The third bead of the gusset overlaps with the first bead of the damper base in the vehicle width direction, creating a multi-layered reinforcement structure that increases strength without simply adding more components in the traditional sense.
3Reliability
If multiple beads are overlapped to increase strength, then the connection reliability is improved, but the manufacturing complexity increases
Solution Approach 1:
The gusset component serves multiple functions: it reinforces the connecting portion between the damper base and cross member, provides an intermediate load transmission path, and increases connection reliability through bead overlap. This multi-functionality reduces the need for separate components and simplifies the overall manufacturing process.
Data Source
AI summary
A vehicle body structure for an automobile includes a damper base connected to an outer wall of a rear side frame in a vehicle width direction on a rear side of a cross member and including a first bead projecting inward in the vehicle width direction and extending in an up-down direction and a damper support portion projecting outward in the vehicle width direction disposed on both sides of the first bead in a front-rear direction, a rear wheel house having a second bead extending in the up-down direction to overlap with an inner surface of of the first bead in the vehicle width direction, and a gusset having a third bead extending in the up-down direction to overlap with the inner surface of the first bead in the vehicle width direction and connected to an upper wall of the rear side frame.