Integrated Mount Member and Seat Rail Fastening for Vibration Control
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Solution Overview
Problem
In vehicles with power transmission mechanisms inside a floor tunnel, vibrations from the power transmission are easily transmitted to seats due to the close proximity of mount member and seat rail fixation points, leading to ineffective vibration reduction and increased weight from highly rigid brackets.
Innovation Solution
A lower vehicle body structure where the mount member and seat rails are jointly fastened to the vehicle body floor, increasing the mass of the vibration system and reducing displacement, thereby minimizing vibration transmission without the need for increased bracket rigidity, and utilizing spacer members like high nuts for effective load distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If highly rigid brackets are used to fix seat rails to reduce vibration transmission, then vibration reduction effect is improved, but vehicle weight increases
Solution Approach 1:
The patent combines the mount member and seat rail support function into a single integrated structure. The mount member is configured to support both the power transmission mechanism and the seat rails, merging two separate support functions into one component. This eliminates the need for separate highly rigid brackets, reducing vehicle weight while still effectively managing vibration transmission through the integrated structure's design.
2Ease of operation
If mount member and seat rails are separately fixed to vehicle body, then installation flexibility is improved, but vibration transmission to seats increases
Solution Approach 1:
The mount member is designed as an integrated component that simultaneously supports the power transmission mechanism and the seat rails. This merging of support functions reduces vibration transmission pathways while maintaining installation flexibility through the unified structure's design features.
3Stability of the object's composition
If rigid brackets are used to support seat rails, then support stability is improved, but device complexity increases
Solution Approach 1:
The mount member integrates multiple support functions into a single structure, reducing the number of separate components needed. This integration maintains support stability for seat rails while simplifying the overall device structure by eliminating the need for separate rigid brackets.
Solution Approach 2:
The mount member is designed as a multi-functional component that performs both power transmission mechanism support and seat rail support functions. This universal design reduces device complexity by using one component for multiple purposes while maintaining the stability required for seat rail support.
Data Source
AI summary
A lower vehicle body structure is provided, which includes a vehicle body floor having a bottom surface part, a floor tunnel bulging upwardly from the bottom surface part of the vehicle body floor and extending in vehicle front-and-rear directions, a power transmission mechanism disposed inside the floor tunnel, a mount member supporting the power transmission mechanism from below, and seat rails disposed on the vehicle body floor and slidably supporting seats from below. The mount member and the seat rails are jointly fastened to the vehicle body floor.