Traction Aid with Scissor Brackets for Variable Tire Diameters
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Solution Overview
Problem
Existing traction aids for motor vehicles are not easily adaptable to different tire diameters and are ineffective in improving friction on icy, snow-covered, or muddy surfaces, particularly for starting vehicles.
Innovation Solution
A traction aid comprising a carrier, central element, and at least three brackets with angled casing elements that pivot to increase friction, featuring a gear mechanism for adjustable mounting and release, and optional spring-loaded connecting joints for enhanced grip.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional traction aids are mounted on tires, then friction on icy or snowy surfaces is improved, but the device is not adaptable to different tire diameters
Solution Approach 1:
The traction aid employs a dynamic scissor mechanism that can expand and contract to adapt to different tire diameters. The scissor arms are connected through pivot joints, allowing the structure to flex and adjust its size to fit various tire dimensions while maintaining the friction-enhancing function on icy or snowy surfaces.
Solution Approach 2:
The device changes its geometric parameters through the scissor mechanism's expansion and contraction. By altering the length and configuration of the scissor arms, the traction aid can be adjusted to match different tire diameters, thereby resolving the contradiction between maintaining reliable friction performance and adapting to varying tire sizes.
2Ease of manufacture
If traction aids with fixed geometry are used, then manufacturing is simplified, but they cannot be easily adapted to different tire sizes
Solution Approach 1:
The traction aid is divided into modular scissor arms that can be manufactured using standard components and then assembled in different configurations. This segmentation allows for simplified manufacturing of individual parts while enabling adaptability through reconfiguration of the modular segments to suit different tire diameters.
3Adaptability or versatility
If complex adjustment mechanisms are added to accommodate different tire sizes, then adaptability is improved, but device complexity increases
Solution Approach 1:
The scissor mechanism provides self-adjusting capability through its inherent mechanical design. The pivot joints and arm configurations allow the structure to naturally adapt to different tire diameters without requiring additional complex control systems, sensors, or actuation mechanisms, thereby maintaining relatively simple device architecture while achieving adaptability.
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 traction aid effectively increases friction on icy, snow-covered, or muddy surfaces by adjusting its geometry to securely attach to various tire sizes, improving starting capabilities and adaptability.
Implementation Method 1
The central element is at least partially a gear, in particular a spur gear or an internal gear and/or the base elements of the brackets are at least partially gears, in particular spur gears
Implementation Method 2
optional spring-loaded connecting joints for enhanced grip
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
The invention relates to a pull-away aid for the tyre on a motor vehicle, comprising a support, a central element and at least three brackets, wherein the brackets each comprise a base element, a radial element and a jacket element at an angle to the radial element. The central element is connected to the support so as to be rotatable about a first axis. Each bracket is connected to the support so as to be pivotable about a further axis each. The central element is in effective engagement with the brackets in such a manner that a rotation of the central element about the first axis causes pivoting of the brackets around one of the further axes, such that a distance between the jacket elements concerned and the first axis changes.