Telescopic Front Fork Steering for Variable Track Leaning Vehicles
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Solution Overview
Problem
Existing three-wheeled vehicles with two front steering wheels face challenges in maintaining stability during straight driving while compromising maneuverability in curves, as existing designs either limit wheel spacing or provide insufficient angle during cornering.
Innovation Solution
A system with telescopic forks for each front wheel, allowing the distance between wheels to adjust dynamically based on lateral loads, ensuring increased stability during leaning and cornering by sliding telescopic inner tubes within outer tubes, coupled by linking elements and springs to maintain optimal wheel spacing for different driving conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the front wheels are linked by a transversal arm at a fixed length to the vehicle body, then stability on straight paths is improved, but cornering ability deteriorates due to unchanging distance between front wheels
Solution Approach 1:
The patent applies the dynamics principle by replacing the fixed-length transversal arm with a telescopic linkage mechanism that allows the distance between front wheels to dynamically adjust. The telescopic forks can extend and retract based on steering angle, providing a narrow track width during straight driving for stability while allowing wider spacing during cornering for improved maneuverability and reduced steering resistance.
Solution Approach 2:
The patent implements parameter changes by varying the front track width according to driving conditions. The telescopic mechanism changes the spatial parameter (distance between wheels) from a fixed value to a variable value that adapts to steering angle and lateral acceleration, thereby optimizing both straight-line stability and cornering performance.
2Stability of the object's composition
If the supporting shafts are positioned on the outer sides of each front wheel to reduce front track width, then stability during straight driving is improved, but maneuverability in curves deteriorates due to limited steering angle
Solution Approach 1:
The patent resolves this contradiction by making the front track width dynamic rather than static. The telescopic forks automatically adjust the wheel spacing based on steering input, maintaining narrow spacing for stability during straight driving while enabling wider spacing during cornering to improve steering angle and reduce lateral forces on the wheels.
3Stability of the object's composition
If the distance between front wheels is kept narrow for straight driving, then stability is improved, but cornering performance deteriorates due to insufficient wheel spacing for optimal handling
Solution Approach 1:
The patent applies universality by designing a single steering system that performs multiple functions: maintaining narrow track width for stable straight-line driving while enabling wide track width for optimal cornering performance. The telescopic linkage mechanism allows the same front wheel assembly to adapt to different driving scenarios, eliminating the need for separate configurations.
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
Enhances stability during leaning and cornering by increasing wheel distance when needed, while maintaining a narrow spacing for straight driving, thus improving overall handling and maneuverability.
Implementation Method 1
The telescopic inner tube (14, 14a, 15, 15a) is configured to slide into and out of the upper telescopic outer tube (11, 11a, 12, 12a) and lower telescopic outer tube (16, 16a, 17, 17a)
Implementation Method 2
The telescopic inner tube (14, 14a, 15, 15a) are pushed outward by a spring element (22)
Data Source
Figure 1
Figure 2
Figure 3(a)~3(b)
AI summary
The invention relates to a system for steering a leaning motor vehicle with two front wheels and to a leaning motor vehicle with two front wheels, system for steering a leaning motor vehicle with two front wheels. The system for steering a leaning motor vehicle with two front wheels comprising a first telescopic fork for a first wheel and a second telescopic fork for a second wheel. Each of the first telescopic form and the second telescopic fork comprising an upper telescopic outer tube and a lower telescopic outer tube, the lower telescopic outer tube being connected to a means for receiving a front wheel, a telescopic inner tube having a first end in longitudinal direction and a second end opposite the first end, the telescopic inner tube being configured to slidably engage with the upper telescopic outer tube and the lower telescopic outer tube, wherein the upper telescopic outer tube engages with the telescopic inner tube at the first end and the lower telescopic outer tube engages with the telescopic inner tube at the second end, and at least one mounting element connected to the upper telescopic outer tube and rigidly connected by means of at least two connecting elements to the respective other mounting element of the other fork, wherein the at least one respective mounting element are rotatably connected the respective connecting elements.