Rear Suspension Structure Balancing Rigidity and Wheel Independence
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Solution Overview
Problem
The torsion beam type rear suspension structure faces a challenge in achieving a balance between flexural rigidity and torsional rigidity, leading to potential inhibition of independent wheel suspension when the torsion beam has excessively high flexural rigidity, and existing solutions struggle to optimize energy efficiency and vehicle stability.
Innovation Solution
A rear suspension structure is designed with a hub carrier having a front arm portion extending towards the vehicle front side and a rear arm portion extending towards the vehicle rear side, coupled to a lateral beam, and a trailing arm with a vehicle body attachment point and a front arm attachment point, allowing for balanced flexural and torsional rigidity, eliminating the need for a torsion beam and improving energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the torsion beam has high flexural rigidity to transmit lateral force, then lateral force transmission is improved, but twisting of the torsion beam is inhibited and independent suspension operation is restricted
Solution Approach 1:
The invention divides the lateral force transmission function from the torsion beam by introducing a separate lateral beam that connects the rear arm portions of the hub carriers. This segmentation allows the torsion beam to focus on torsional flexibility for independent wheel suspension while the lateral beam handles lateral force transmission, resolving the contradiction between lateral force transmission and independent suspension operation.
2Stability of the object's composition
If the torsion beam has excessively high flexural rigidity, then structural stability is improved, but the balance between flexural rigidity and torsional rigidity is disrupted
Solution Approach 1:
The invention extracts the lateral force transmission function from the torsion beam system by introducing a dedicated lateral beam. This allows the torsion beam to be optimized for torsional rigidity without needing excessive flexural rigidity, simplifying the rigidity balance while maintaining structural stability through the separate lateral beam structure.
3Ease of operation
If a torsion beam is used to support rear wheels, then independent suspension is achieved, but the structure becomes complex and space utilization is reduced
Solution Approach 1:
The invention merges the lateral beam function into the hub carrier structure by having the rear arm portions of the hub carriers serve as connection points for the lateral beam. This integration reduces the number of separate components compared to traditional torsion beam designs while maintaining independent suspension capability through the front arm portions that extend beyond the axle.
Data Source
AI summary
A rear suspension structure includes a hub carrier having a wheel support portion by which a rear wheel is rotatably supported, the hub carrier includes a front arm portion that extends in a vehicle inner direction and toward the vehicle front side beyond an axle of the rear wheel and a rear arm portion that extends toward the vehicle rear side, the rear arm portion is coupled to a lateral beam extending in a vehicle width direction, on the vehicle rear side of the axle, a vehicle rear side end portion of a trailing arm extending in a vehicle front-rear direction is coupled to the lateral beam, and the front arm portion is coupled to a front arm attachment portion provided in the trailing arm.