Extendable V-Shaped Rollover Protection Structure
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Solution Overview
Problem
Existing rollover protection structures for vehicles, such as tractors, often fail to provide complete protection due to limitations in design, requiring driver intervention, mechanical stress, and limited geometric expansion, leading to inadequate safety and potential trapping of the driver during rollover incidents.
Innovation Solution
An extendable 'V' shaped protective structure with retractable vertical and horizontal tubular bars, controlled by a bi-axial tilt sensor, automatically deploys by increasing height and width upon rollover detection, using pressurized gas and semi-circular buffers to ensure secure deployment and prevent folding back, providing active safety independent of driver action.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a fixed protective structure is used, then the structure is simple and reliable, but it does not provide sufficient protection space when the vehicle rolls over
Solution Approach 1:
The protective structure transitions from a static fixed configuration to a dynamic deployable configuration. The lateral bars and upper bar are designed to be movable relative to each other, allowing the structure to expand outward when deployed, increasing the protection space volume while maintaining simplicity in the folded state
Solution Approach 2:
The lateral bars are nested within each other in a telescopic arrangement, with inner bars sliding within outer bars. This nesting allows the structure to compact to a small volume when folded while enabling significant expansion when deployed, resolving the contradiction between compact storage and expanded protection space
2Volume of moving object
If a telescopic structure with mechanical articulation is used, then the structure can expand, but it creates extra stress and possible trapping of the driver
Solution Approach 1:
The complex mechanical articulation elements that cause stress and trapping risks are removed from the design. Instead of using articulated joints with moving connections, the patent employs telescopic bars with simple linear guides and elastic rods that slide within tubular sections, eliminating the harmful mechanical articulation while preserving the expandable function
Solution Approach 2:
The structure uses simple, robust components like elastic rods and telescopic bars that can be easily replaced if needed, rather than complex articulated mechanisms. The design prioritizes simplicity and reliability over mechanical sophistication, using basic elements that minimize stress concentration points
3Extent of automation
If manual activation is used, then the structure is simple to construct, but it requires driver intervention and may not deploy automatically
Solution Approach 1:
The protective structure is designed to deploy automatically without driver intervention. The tilt sensor detects vehicle rollover conditions and triggers the deployment mechanism autonomously, while the elastic rods and gas pressure devices provide self-powered deployment action, making the system self-activating and removing the need for manual operation
Solution Approach 2:
The manual mechanical activation system is replaced with an automated sensor-based control system. A tilt sensor detects vehicle orientation changes and electronically triggers the deployment, substituting mechanical driver action with an automated sensing and actuation system that reduces complexity in the control interface while increasing automation
4Volume of moving object
If the structure increases height only, then deployment is simple, but the width remains the same and protection is limited
Solution Approach 1:
The protective structure expands in multiple dimensions simultaneously - both vertically (height) and horizontally (width). The lateral bars extend outward perpendicular to the vehicle centerline while also rising vertically, creating a three-dimensional expansion that increases protection volume more effectively than unidirectional deployment
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 structure effectively expands to enhance the driver's safety space by increasing both height and width, ensuring complete protection during rollovers without driver intervention, reducing mechanical stress, and maintaining stability through efficient deployment and blocking mechanisms.
Implementation Method 1
controlled by a system of commands associated with a bi-axial tilt sensor
Implementation Method 2
propelling the protection bar by using gas to cause a wholly vertical deployment
Implementation Method 3
with a number of elastic elements that allow the folding and unfolding of the structure
Data Source
AI summary
The invention relates to an extendable vehicle roll-over protection structure formed by a closed V-shaped structure (1), in which both the vertical side segments (4) and the horizontal upper segment (7) can be extended and retracted telescopically, with both the width and the height of the structure being increased as it moves from the retracted position to the extended position. The lower end of the vertical side tubular elements (4) of the structure are suitably secured to the chassis of the associated vehicle (2). The structure (1) is extended prior to a pre-determined inclination of the vehicle via the pressing of an inclination sensor and by means of an activation algorithm or command.