PBV Rear Frame Structure for Battery Mounting and Suspension Support
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Solution Overview
Problem
Conventional frame structures for purpose-built vehicles with high-voltage batteries face challenges in supporting the front side of the rear wheel suspension due to the widened gap between side members, making it difficult to mount the battery and provide adequate rigidity against rear collisions.
Innovation Solution
A frame structure for purpose-built vehicles that compactly and firmly fixes the front side of the rear suspension to the frame without protruding outside, using an inner panel, front outer panel, center outer panel, and rear outer panel to form a closed cross-section, with kick-up portions and bulkheads to secure the rear suspension member and maintain battery mounting ease and collision rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the gap between side members is widened to allow easier battery mounting, then ease of manufacture is improved, but the ability to support the front side of rear suspension deteriorates
Solution Approach 1:
The side member is divided into multiple functional panels (inner panel, front outer panel, center outer panel, rear outer panel) that can be independently configured. This segmentation allows the gap between side members to be widened for battery mounting while maintaining structural integrity through the distributed panel configuration and alternative support paths.
2Strength
If the rear suspension is firmly fixed to the frame, then strength is improved, but device complexity increases
Solution Approach 1:
The suspension support function is merged into the side member structure itself through the center outer panel and inner panel configuration. Instead of adding separate support brackets or structures, the side member is designed to directly support the rear suspension, combining structural and functional roles to reduce overall complexity while maintaining strength.
3Volume of moving object
If the rear suspension is compactly fixed within the vehicle, then volume is reduced, but ease of operation deteriorates
Solution Approach 1:
The center outer panel and inner panel structure serves multiple functions simultaneously: it provides structural support for the side member, creates mounting locations for the rear suspension, and defines the compact boundary for suspension placement. This multi-functionality achieves compact integration while maintaining ease of operation through standardized panel-based mounting interfaces.
Data Source
AI summary
A frame structure for a purpose built vehicle (PBV) includes: an inner panel connected to the rear of a middle part of a side member to form an inner side of a rear part of the side member, a front outer panel connected to the rear of the middle part of the side member and coupled to an outer side of the inner panel to form a closed cross-section, a center outer panel connected to the rear of the front outer panel and coupled to the outer side of the inner panel to form a space in which a rear suspension member is coupled, and a rear outer panel connected to the rear of the center outer panel and coupled to the outer side of the inner panel to form a closed cross-section.