Vehicle Stabilizer Ball Screw Mechanism for Stiffness Control
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Solution Overview
Problem
Existing mobile vehicle stabilization systems face challenges such as limited stiffness variability, complex hydraulic installations, and difficulty in maintaining pressure on the drive wheel, particularly during braking, leading to instability and increased costs.
Innovation Solution
A mobile vehicle stabilization system utilizing a ball screw mechanism with a rotary shaft and ball nut, coupled with a braking device, a spring for deployment, and a damper for vibration absorption, allowing for adjustable stiffness and reliable operation without hydraulic complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If hydraulic stabilizers with solenoid valves are used to block oil circulation and make the stabilizer rigid, then stability is improved, but the stiffness cannot be varied and the system becomes complex
Solution Approach 1:
The patent extracts the hydraulic system entirely from the stabilization mechanism, replacing it with a purely mechanical ball screw assembly. The ball screw mechanism provides rigid positioning without requiring hydraulic fluid, solenoid valves, or complex control systems, thereby eliminating the complexity while maintaining stability.
Solution Approach 2:
The patent replaces the hydraulic actuation system with a mechanical ball screw system. The ball screw converts rotational motion to linear motion mechanically, providing rigid stabilizer positioning without hydraulic components. This substitution eliminates the need for solenoid valves and hydraulic fluid circulation systems.
2Adaptability or versatility
If controlled hydraulic stabilizers are used to modify stiffness according to vehicle inclination or load, then adaptability is improved, but the hydraulic installation becomes complex
Solution Approach 1:
The patent implements dynamic adaptability through a mechanical linkage system connected to the ball screw mechanism. As the forklift tilts or loads change, the mechanical linkage automatically adjusts the ball screw position, varying the stabilizer stiffness in response to vehicle conditions without requiring complex hydraulic control systems.
Solution Approach 2:
The stabilization system operates autonomously through its mechanical design. The ball screw mechanism with its inherent friction and mechanical advantage automatically maintains rigid positioning once deployed, and the mechanical linkage self-adjusts to vehicle conditions without requiring external hydraulic control or active management.
3Ease of manufacture
If fixed lateral stabilizers are used with suspended drive wheels, then manufacturing simplicity is improved, but the ability to maintain sufficient pressure on the drive wheel during braking deteriorates
Solution Approach 1:
The patent segments the stabilization function from the drive wheel suspension, using a separate ball screw mechanism to control stabilizer wheel position. This independent control allows the stabilizer to maintain ground contact pressure while the drive wheel suspension remains simple, ensuring both manufacturing ease and reliable braking performance.
Solution Approach 2:
The ball screw mechanism provides periodic mechanical advantage through its threaded geometry, allowing the stabilizer wheel to be firmly pressed against the ground during braking events while maintaining system simplicity. The mechanical threading converts small rotational inputs into large linear forces periodically applied to maintain grip.
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 system provides reliable, cost-effective, and simple stabilization by allowing adjustable stiffness and maintaining contact with the ground, ensuring stability and grip, even in varying conditions and during energy loss scenarios.
Implementation Method 1
a ball screw comprising a rotary shaft associated with a ball nut, the balls cooperating with said guide member movable in translation such that a translational movement of said guide member is transformed into a rotation of said rotary shaft and vice versa
Implementation Method 2
at least one shaft braking device being provided to brake and /or block the rotation of said rotating shaft
Implementation Method 3
the system comprises a spring which urges said stabilization wheel towards its deployed position
Implementation Method 4
the system includes a damper, in particular linear or rotary, to absorb the vibrations
Data Source
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Figure 7
AI summary
Moving vehicle stabilisation system A moving vehicle stabilisation system (1), comprising at least one stabilisation wheel (10) that can move between a retracted position and a deployed position, a support member (20) associated with said stabilisation wheel (10), which movably connects said at least one stabilisation wheel (10) both to a chassis (30) and to a guiding member (40) that can move translationally, said system comprising a ball screw (50) comprising a rotating shaft (51) associated with a ball nut (52), said ball screw (50) cooperating with said guiding member (40) that can move translationally in such a way that a translational movement of said guiding member (40) is transformed into a rotation of said rotating shaft (51) and vice versa, at least one shaft braking device (60; 70) being provided for braking and/or rotationally immobilising said rotating shaft (51).