Multi-link Suspension with Elastic Bushes for Ride Quality
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Solution Overview
Problem
Existing suspension devices for vehicle wheels lack effective means to restrict large displacements while maintaining adequate ride quality, leading to reduced forward-backward rigidity and increased shock absorption needs.
Innovation Solution
A suspension device with two lower links and an upper link, where the lower links are mounted to the axle and suspension member with elastic bushes allowing for vertical swinging and relative displacement, generating elastic forces to restrict excessive movement and absorb shocks, thereby reducing forward-backward rigidity and enhancing ride quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the suspension device uses rigid links to maintain structural stability, then the forward-backward rigidity is high, but the ride quality deteriorates due to increased shock transmission
Solution Approach 1:
The patent changes the rigidity parameter of the links by introducing elastic properties. The links are designed with elastic materials or elastic structures that allow them to deform under load, transforming the rigid connection into a flexible one that can absorb shocks while maintaining structural integrity during normal operation.
Solution Approach 2:
The elastic links provide beforehand cushioning by incorporating elastic elements that can store and dissipate energy before shocks are transmitted to the wheel assembly. This preemptive energy absorption reduces the impact of road irregularities on the vehicle.
2Object-affected harmful factors
If the suspension device reduces forward-backward rigidity to improve ride quality, then shock absorption is enhanced, but wheel displacement control is insufficient
Solution Approach 1:
The patent applies local quality by making different parts of the suspension system have different rigidity characteristics. The links have elastic properties in the vertical direction to absorb shocks, while maintaining sufficient rigidity in the horizontal direction to control wheel displacement and maintain steering stability.
Solution Approach 2:
The suspension system transitions from a static rigid structure to a dynamic system where the links can elastically deform in response to vertical loads while maintaining their structural configuration for horizontal stability. This dynamic behavior allows the system to adapt to varying road conditions.
3Ease of operation
If the suspension device uses elastic linking portions to allow relative displacement, then ride quality is improved, but the complexity of the device increases
Solution Approach 1:
The patent merges the functions of structural support and shock absorption into a single integrated link structure. The elastic links combine the load-bearing function with the shock-absorbing function, eliminating the need for separate cushioning elements and simplifying the overall suspension architecture.
Solution Approach 2:
The elastic links serve multiple functions simultaneously: they provide structural support, absorb shocks, allow relative displacement, and maintain wheel position control. This multi-functionality reduces the number of separate components needed in the suspension system.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The suspension device effectively restricts wheel displacement, reduces shock and vibration, and increases steering stability by setting low forward-backward rigidity and high horizontal rigidity, improving ride quality and stability during braking and turning.
Implementation Method 1
At least one elastic linking portion links the projecting portion to the second link
Implementation Method 2
the lower links are mounted to the axle and suspension member with elastic bushes allowing for vertical swinging and relative displacement, generating elastic forces to restrict excessive movement and absorb shocks
Data Source
AI summary
A wheel suspension device for a vehicle includes a wheel supporting member rotatably supporting a wheel. The wheel supporting member is linked to a vehicle-body side by a first link and a second link, with the second link arranged substantially parallel to the first link in a vehicle width direction. The first link has a projecting portion, and at least one elastic linking portion links the projecting portion to the second link.