Control Arm Base for Targeted Rigidity
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Solution Overview
Problem
Conventional wishbone suspensions with separated partial wishbones struggle to achieve targeted longitudinal and transverse rigidity due to the limitations of using simple conventional joints, making it difficult to influence the stiffness distribution effectively.
Innovation Solution
A wishbone base with multiple vehicle connection joints and partial wishbone connection joints allows for targeted manipulation of longitudinal and transverse rigidity by using a combination of rigid and elastic joints, enabling the use of ball joints, sliding joints, and additional elastic elements to optimize the distribution of forces and stiffness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If simple conventional joints are used to connect separated partial wishbones to the vehicle, then the device complexity is reduced, but the ability to targetedly influence longitudinal and transverse rigidity deteriorates
Solution Approach 1:
The wishbone is divided into multiple separated partial wishbones (at least two), each connectable to the vehicle via separate vehicle connection joints through a wishbone base. This segmentation enables independent positioning and selection of joint characteristics for each partial wishbone, allowing targeted optimization of longitudinal and transverse rigidity while maintaining relatively simple conventional joint structures.
Solution Approach 2:
Different vehicle connection joints are assigned different rigidity characteristics - one joint is designed to be rigid radially to the longitudinal direction for transverse rigidity, while another joint is designed to be soft axially to the longitudinal direction for longitudinal elasticity. This local differentiation of joint properties enables precise control over the rigidity distribution without requiring complex overall joint designs.
2Stability of the object's composition
If multiple vehicle connection joints with different rigidity characteristics are used, then the rigidity distribution is optimized, but the device complexity increases
Solution Approach 1:
The wishbone base serves as a universal mounting structure that accommodates multiple different types of vehicle connection joints (rigid ball joints, soft rubber joints, sliding joints) and multiple partial wishbones. This multi-functional base design enables the system to achieve complex rigidity distribution goals while keeping the overall structure relatively simple and modular.
3Ease of operation
If pivotable partial wishbones are used to avoid the wheel during steering, then the turning circle is reduced, but the device complexity increases
Solution Approach 1:
At least one partial wishbone is designed to be pivotable about a pivot axis extending between the wheel-side and vehicle-side joint, enabling the wishbone to dynamically change its position and avoid collision with the wheel during extreme steering movements. This dynamic capability allows the system to achieve larger maximum steering angles and reduced turning circles while maintaining a relatively simple structural design.
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 configuration enhances the maneuverability of vehicles by allowing higher maximum steering angles, reducing the turning circle, and enabling more agile vehicle movements while maintaining cost-effectiveness and reliability.
Implementation Method 1
The partial wishbones are connected to the wishbone base by a ball joint
Implementation Method 2
an elastic solid body joint, a so-called rubber joint, is used for the other vehicle-side joint
Data Source
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AI summary
The invention relates to a control arm base (30) for connecting a control arm (10), particularly a divided control arm, for a wheel (20) to a vehicle, which control arm (10) comprises at least two partial control arms (11a, 11b) which can be connected on the one hand to a vehicle-side joint (32a, 32b) and on the other to a wheel-side joint (13, 13a, 13b, 13c). In order to realize a targeted influencing of the longitudinal and transverse rigidity of the control arm with simple conventional joints, the control arm base (30) comprises at least two vehicle-connecting joints (31a; 31b) for articulated connection of the control arm base (30) to the vehicle, and at least two partial control arm connecting joints (32a, 32b) for the vehicle-side articulated connection of each of the partial control arms (11a, 11b) to the control arm base (30). The invention further relates to a wheel suspension that comprises such a control arm base (30).