Eccentric Wheel Suspension Layout for Variable Impact Damping
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Solution Overview
Problem
Suspension systems in vehicles face difficulties in variably coping with impacts from different driving environments, such as road surfaces, which affects the comfort and stability of electric and hybrid vehicles equipped with autonomous driving functions.
Innovation Solution
A driving device comprising a wheel part, an eccentric part connected to the vehicle body, and a suspension system that provides elastic force to dampen impacts between the vehicle body and wheel part, with the eccentric part having a rotation axis parallel to and eccentric from the wheel part's rotation axis, and a suspension that connects the wheel and eccentric parts to absorb and alleviate impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional suspension system is used, then the vehicle can handle basic road conditions, but it cannot variably cope with impacts from different driving environments
Solution Approach 1:
The suspension system incorporates an eccentric mechanism that allows dynamic adjustment of the suspension characteristics. The eccentric part rotates relative to the wheel part, changing the suspension geometry and stiffness in real-time based on road conditions, enabling the system to adapt to different driving environments while maintaining stability
Solution Approach 2:
The system changes the suspension parameters (stiffness, damping characteristics) by varying the eccentric offset distance through rotation. This allows the suspension to provide different levels of rigidity and compliance depending on the road conditions, improving both adaptability and reliability across varying environments
2Stability of the object's composition
If the suspension is made stiffer to improve stability, then vehicle stability improves, but impact damping capability decreases
Solution Approach 1:
The eccentric mechanism enables dynamic adjustment of suspension stiffness. When stable road conditions are detected, the system can adopt a stiffer configuration for improved stability. When rough roads are encountered, the system transitions to a more compliant configuration to better dampen impacts, thus resolving the contradiction between stability and impact damping
3Object-affected harmful factors
If the suspension is made softer to improve impact damping, then impact absorption improves, but vehicle stability deteriorates
Solution Approach 1:
By changing the eccentric offset parameter through rotation, the system can adjust the suspension characteristics. A larger eccentric offset provides softer suspension for better impact damping on rough roads, while a smaller offset provides stiffer suspension for better stability on smooth roads, dynamically resolving the contradiction
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 solution effectively absorbs and alleviates impacts, improving the comfort and stability of vehicles by controlling the relative location of the wheel to the vehicle body and providing efficient damping of external forces, thereby enhancing the vehicle's ability to handle varying road conditions.
Implementation Method 1
a suspension coupled to the wheel part and to the eccentric part. The suspension is configured to provide an elastic force to damp an impact between the vehicle body and the wheel part
Implementation Method 2
an eccentric part configured to connect a vehicle body to the wheel part; and an eccentric link extending from the eccentric center and configured to rotate about the rotation axis of the wheel part
Data Source
AI summary
A driving device includes a wheel part with a wheel frame, and a wheel driving unit disposed at a center of the wheel frame to be able to rotate the wheel frame, an eccentric part connecting a vehicle body to the wheel part, and a suspension coupled to the wheel part and to the eccentric part. The suspension is configured to provide an elastic force to damp an impact between the vehicle body and the wheel body. The eccentric part includes an eccentric center having a rotation center being eccentric from a rotation axis of the wheel part, and an eccentric link extending from the eccentric center. The eccentric link is rotatable about the rotation axis of the wheel frame.