Crawler Track Guide Wheel Tensioning Mechanism
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Solution Overview
Problem
Crawler tracks experience unstable traveling properties and excessive wear due to the inability to stably support guide wheels laterally and transmit tensioning forces without lateral force components, leading to potential loss of track or chain.
Innovation Solution
A crawler track design featuring a guide wheel tensioning device with a linearly guided slide block that separates lateral support from tensioning force transmission, using a tensioning lever and slide block to ensure forces are parallel to the movement direction, allowing for stable lateral support and reduced wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the guide wheel is pivoted about the pivot bearing of the tensioning lever, then the tensioning lever can transmit tensioning force, but the lateral support of the guide wheel becomes unstable and lateral forces are generated
Solution Approach 1:
The patent divides the tensioning device into separate functional components: a tensioning lever for transmitting tensioning forces and a guide part with linear guidance for lateral support. This segmentation allows each component to perform its specific function independently, eliminating the coupling between tensioning force transmission and lateral support that causes instability.
Solution Approach 2:
The slide block acts as an intermediary element between the tensioning lever and the guide part. It converts the rotational motion of the tensioning lever into linear motion of the guide part while maintaining proper force transmission directions, thereby mediating between the two functional requirements without transferring unwanted lateral forces.
2Force
If the pivot axis of the tensioning lever has a distance from the axis of the guide wheel, then tensioning force can be transmitted, but the guide wheel imparts lateral forces on the tensioning lever and suspension
Solution Approach 1:
The slide block serves as a mediator that decouples the force transmission path. It receives forces from the tensioning lever and transmits them to the guide part in a controlled manner, ensuring that only tensioning forces are transmitted along the linear movement direction while blocking lateral force components from affecting the suspension.
Solution Approach 2:
The patent replaces the conventional direct mechanical linkage between the tensioning lever and guide wheel with a slide block mechanism. This substitution changes the mechanical interaction from a direct pivot connection to a guided linear movement system, eliminating the generation of harmful lateral forces.
3Force
If the guide wheel moves against the spring action of the tension cylinder, then tensioning can be achieved, but the interior geometry of the crawler track varies frequently causing wear
Solution Approach 1:
The patent employs a dynamic slide block mechanism that adapts to the movement of the guide wheel during tensioning cycles. The slide block maintains continuous linear guidance while accommodating the dynamic positioning changes, ensuring stable force transmission throughout the entire service life without causing geometric variations or excessive wear.
4Length of moving object
If a compact tensioning device is used, then the distance between guide wheel and caster wheel is reduced, but the lateral support stability must be maintained
Solution Approach 1:
By separating the lateral support function (performed by the guide part with linear guidance) from the tensioning force transmission function (performed by the tensioning lever via slide block), the patent achieves compact dimensions without compromising stability. Each function is optimized independently, allowing reduced overall size while maintaining proper lateral support.
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 stable lateral support for guide wheels, reduces wear, and maintains track stability by transmitting tensioning forces without lateral components, resulting in improved travel performance and extended service life.
Implementation Method 1
The slide block (11) converts the pivot movements of the tensioning lever (9) into linear movements of the guiding part (12)
Implementation Method 2
The guide part (12) is exclusively linearly guided in a linear guiding jaw (14) of the track carrier (1)
Implementation Method 3
The tensioning member (6) transmits the tensioning force via the tensioning lever (9) to the guide part (12)
Data Source
AI summary
In a crawler track comprising at least one guide wheel and caster wheels at a track carrier, at least one driving wheel for the track, and a guide wheel tensioning device including at least one tensioning member which acts on the guide wheel via a tensioning lever supported at the track carrier, the guide wheel is provided in a guide part which is exclusively linearly moveable and is laterally supported in the track carrier with a slide block arranged between the guide part and the tensioning lever, which slide block can slide crosswise and relatively to the linear direction of movement of the guide part while transmitting the tensioning force substantially parallel to the linear direction of movement of the guide part.