Transverse Leaf Spring Suspension with Articulated Resilient Support
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Solution Overview
Problem
Transverse leaf springs in vehicle wheel suspensions face challenges in achieving optimal rolling and lifting stability while minimizing weight and cost, with complex inner articulation requirements that include low friction, low hysteresis, and resistance to environmental factors.
Innovation Solution
A wheel suspension design featuring a transverse leaf spring supported by resilient members with articulated engagements on both sides of the vehicle longitudinal center plane, utilizing semi-oval or cylindrical pins made of hard materials for low-resistance bearing, and optionally incorporating bushings to reduce friction, allowing for simplified structure and reduced hysteresis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the inner articulation locations are constructed with complex structure to ensure high vertical rigidity, then rolling and lifting stability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines multiple functions into a single integrated transverse leaf spring structure that simultaneously provides both rolling stability and lifting stability. The leaf spring's central portion and articulation locations are designed to work together as a unified system, eliminating the need for separate complex articulation mechanisms while achieving the desired stability performance.
Solution Approach 2:
The patent optimizes the geometric parameters of the transverse leaf spring, including the spacing between inner articulation locations, the thickness distribution, and the curvature of the central portion. By carefully selecting these parameters, the spring achieves high vertical rigidity for stability while maintaining structural simplicity and ease of manufacture.
2Stability of the object's composition
If the inner articulation locations are designed with high vertical rigidity, then rolling stability is improved, but the ability to accommodate lateral deformation during lifting movements is reduced
Solution Approach 1:
The patent applies different structural characteristics to different regions of the transverse leaf spring. The inner articulation locations are designed with features that provide high vertical rigidity for rolling stability, while the central portion of the spring is configured with appropriate flexibility to accommodate lateral deformations during lifting movements. This local differentiation of structural properties resolves the contradiction between vertical rigidity and lateral adaptability.
3Weight of moving object
If resilient members are used to support the transverse leaf spring, then weight reduction is achieved by replacing superstructure springs and stabilizer, but friction and hysteresis at articulation points increase
Solution Approach 1:
The patent introduces resilient members as intermediary elements between the transverse leaf spring and the vehicle body. These resilient members are specifically designed to minimize friction and hysteresis while providing the necessary support and articulation functionality. The use of appropriate materials and surface treatments for the resilient members helps reduce energy losses.
Solution Approach 2:
The resilient members are designed to automatically compensate for friction and hysteresis effects through their elastic properties. The material selection and geometric design of the resilient members enable them to maintain low friction characteristics while providing the required load-bearing capacity, effectively managing energy losses without additional complex mechanisms.
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
This design achieves weight and cost savings, enhanced dynamic behavior, and improved resistance to environmental factors by providing low-friction, low-hysteresis articulation while maintaining desired rigidity and resilience, thus optimizing vehicle stability and comfort.
Implementation Method 1
a transverse leaf spring (2) which is arranged transversely relative to a vehicle longitudinal axis and which is supported at each of the two sides of a vehicle longitudinal center plane by at least one resilient member (10, 16) on a vehicle-side support (11, 17)
Implementation Method 2
the inner articulation locations are intended to be constructed with low friction and low hysteresis
Implementation Method 3
the inner articulation locations are intended to be constructed with low friction and low hysteresis
Data Source
AI summary
The invention relates to a wheel suspension for a vehicle, in particular a motor vehicle, having a transverse leaf spring arranged transversely relative to a vehicle longitudinal axis. The transverse leaf spring is supported at each of the two sides of a vehicle longitudinal center plane by at least one resilient member on a vehicle-side support which is securely connected to the vehicle superstructure or an auxiliary frame which is connected to the vehicle superstructure. The resilient member and the support form an articulated engagement. With an articulated engagement provided at each side of the vehicle longitudinal center plane.