Vehicle Body Lower Structure Rocker Bracket Energy Absorbing Member
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Solution Overview
Problem
The existing vehicle body lower structures require multiple types of energy absorbing members to accommodate different vehicle widths, leading to increased costs when using a single type of power source across various vehicle widths.
Innovation Solution
A vehicle body lower structure design that includes a pair of rockers, a power source, a first energy absorbing member under the rocker, a second energy absorbing member between the first member and the power source, and a bracket extending from the power source to the second member, which allows for a single type of power source to be used across different vehicle widths by dividing the energy absorbing member based on vehicle width, while ensuring firm support through additional fixation points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single EA member is used to connect the rocker and power source, then the structure is simple, but multiple types of EA members are required for different vehicle widths, increasing cost
Solution Approach 1:
The EA member is divided into a first EA member connected to the rocker and a second EA member connected to the power source, with a bracket extending from the power source. This segmentation allows the first EA member to be selected based on vehicle width while the second EA member and bracket remain standardized, reducing the number of unique parts needed across different vehicle models.
2Adaptability or versatility
If two EA members are arranged between the power source and rocker, then adaptability to different vehicle widths is improved, but the supporting structure for the power source becomes weaker
Solution Approach 1:
A bracket extending from the bottom of the power source in the vehicle width direction is introduced as an intermediary element. The bracket is fixed to the second EA member and provides an additional fixation point, allowing the two EA members to be arranged for adaptability while maintaining structural strength through the bracket's support.
3Strength
If the bracket is fixed to the first EA member and second EA member, then the power source is supported firmly, but the structure becomes more complex
Solution Approach 1:
The bracket serves multiple functions: it extends from the power source in the vehicle width direction, provides a fixation point for the second EA member, and connects to the first EA member to firmly support the power source. By making the bracket multi-functional, the design achieves firm support without proportionally increasing structural complexity.
Data Source
AI summary
A vehicle body lower structure may include: a rocker arranged in a lower lateral part of a vehicle body and extending along a front-rear direction of the vehicle body; a power source arranged adjacent to the rocker; a first energy absorbing member arranged under the rocker; a second energy absorbing member arranged between the first energy absorbing member and the power source; and a bracket extending from a bottom of the power source along a vehicle width direction, the bracket being fixed to the second energy absorbing member, wherein the first energy member, the rocker, and the bracket are fixed to each other.