Cranked Stabilizer Bar with Aligned Connection Points
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Solution Overview
Problem
Existing stabilizer bar designs for vehicles experience bending loads and axial movement, leading to increased dimensions, weight, and packaging issues, which can result in undesirable rolling movements and reduced working life.
Innovation Solution
A stabilizer bar with cranked parts aligned with bearings, where each connection point is substantially in the same plane as the bearing, and hollow shaft with internal bearings to reduce dimensions and prevent axial movement, using composite materials and flexible bushings for limited angular movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the connection points are spaced apart from the bearings in the longitudinal direction of the shaft, then the stabilizer bar can accommodate the bearing mounting requirements, but bending loads are applied to the shaft causing undesirable rolling movement and reduced working life
Solution Approach 1:
The connection points are positioned in the longitudinal direction (along the shaft axis) rather than being spaced apart laterally, changing the spatial dimension of the force application. This alignment ensures forces act through the shaft's longitudinal axis, preventing bending moments while maintaining bearing mounting capability
2Strength
If the shaft dimensions are increased to withstand bending loads, then the stabilizer bar can resist bending moments, but the overall dimensions and weight of the stabilizer bar increase
Solution Approach 1:
Instead of increasing shaft dimensions to resist bending loads, the design inverts the approach by aligning the connection points with the bearings to eliminate bending loads entirely. This allows the use of lighter, smaller-diameter shafts that only need to withstand torsional loads, significantly reducing weight while maintaining or improving performance
3Strength
If the shaft dimensions are increased to withstand bending loads, then the stabilizer bar can resist bending moments, but the packaging space and ground clearance requirements increase
Solution Approach 1:
The design eliminates the need for oversized shafts by inverting the load management approach - connection points are aligned with bearings to prevent bending moments, allowing the use of compact, smaller-volume shafts that fit better within vehicle packaging constraints and maintain adequate ground clearance
4Stability of the object's composition
If traditional stabilizer bar designs are used, then the structure can support rolling movement, but axial movement of the stabilizer bar occurs interfering with normal operation
Solution Approach 1:
The stabilizer bar is segmented into functional zones: the shaft provides torsional rigidity for roll control, while the hollow ends provide axial constraint through bearing mounting surfaces. This segmentation allows each part to specialize - the shaft resists twisting while the end structures prevent unwanted axial movement, improving overall reliability
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 provides a compact, low-weight stabilizer bar that effectively resists torsional loads while minimizing bending moments, enhancing roll stabilization and reducing packaging constraints and ground clearance issues.
Implementation Method 1
Such angular movement applies a twisting, torsional load to the shaft 5. This relative angular movement is resisted by the inherent stiffness of the shaft 5, thus the shaft 5 serves to control or limit the rolling movement.
Implementation Method 2
The bushing 26 is made of a flexible material such as rubber or rubber-like material.
Implementation Method 3
Each bearing preferably comprises a flexible material bushing located upon a support and compressed between a part of the support and a part of the respective bracket, the bushing being located within the shaft.
Data Source
AI summary
The invention relates to stabilizer bar (10) for use with the suspension of a vehicle such as a truck. The stabilizer bar (10) comprises a shaft (12) supported by bearings (18), cranked parts for example in the form of crank arms (30) being provided at or adjacent each end of the shaft (12), each cranked part having a connection point (32) for connection, in use, to a respective link member (34), wherein each connection point (32) is substantially aligned with a respective one of the bearings (18) relative to the axis of the shaft (12). The invention also relates to a vehicle incorporating such a stabilizer bar (10) and to a roll stabilization method using such a stabilizer bar (10).