Tilting Linkage Roller Wheel Motion Limiter for Track Systems
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Solution Overview
Problem
Tracked work vehicles face challenges in maintaining traction and reducing track wear when encountering uneven terrain with a mix of soft and hard surfaces, as existing track systems struggle to balance stiffness and kinematic compliance.
Innovation Solution
A track system featuring a tilting linkage that connects roller wheels to an undercarriage beam, with a roller wheel motion limiter that applies elastic or damping actions to enhance ground pressure uniformity, either passively through elastic elements or actively using actuators, to adapt to varying ground conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the track system uses a rigid suspension structure to maintain stability, then the vehicle maintains stable operation on uniform soft ground, but the track undergoes excessive wear when encountering hard obstacles
Solution Approach 1:
The suspension structure is transformed from a rigid fixed configuration to a dynamic tilting configuration. The roller wheels are mounted on tilting linkages that allow them to tilt relative to the undercarriage beam, enabling the system to adapt its geometry dynamically when encountering obstacles while maintaining stability on uniform terrain
Solution Approach 2:
The suspension system is divided into independent tilting linkage units, each capable of tilting independently. This segmentation allows localized adaptation to obstacles without compromising the overall stability of the entire suspension system
2Productivity
If the roller wheels are constrained to provide proper support on uniform soft ground, then traction performance is maintained, but the rollers cannot retract sufficiently when hard bodies are present on the ground surface
Solution Approach 1:
The roller wheel mounting structure incorporates tilting linkages that provide dynamic adjustment capability. The roller wheels can tilt forward to retract from hard obstacles while maintaining their support function on soft ground, achieving both traction performance and obstacle adaptability through geometric transformation
3Object-affected harmful factors
If the track system uses a compliant suspension design to adapt to obstacles, then track wear is reduced, but the vehicle loses stability on uniformly soft ground
Solution Approach 1:
The tilting linkages are designed with specific geometric parameters and constrained motion paths that provide compliance only in the tilting degree of freedom. The roller wheels remain firmly supported in the vertical direction on uniform ground, maintaining stability while gaining adaptive capability through controlled tilting motion
Solution Approach 2:
The compliance is localized to the tilting degree of freedom of each roller wheel assembly, while other degrees of freedom maintain rigid support characteristics. This selective compliance allows adaptation to obstacles without sacrificing overall suspension stability
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 improves traction and reduces track wear by ensuring consistent ground pressure and adapting to obstacles, while also being retrofittable for existing vehicles.
Implementation Method 1
roller wheel motion limiter can be either passive, i.e. an elastic and/or damping element such as a spring, in particular a rubber or gas spring
Implementation Method 2
roller wheel motion limiter can be either passive, i.e. an elastic and/or damping element such as a spring
Data Source
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AI summary
A track system for a work vehicle comprises a driving wheel (7), an undercarriage beam (14) hinged to a frame (2) of the vehicle, at least one idler wheel (9), at least a first and a second roller wheels (11, 12) attached to the undercarriage beam (14) and a rubber track (6) wound about at least driving wheel (7), idler wheel (9), first and second roller wheels (11, 12). The track system further comprises a tilting linkage (20) to attach first and second roller wheels (11, 12) to the undercarriage beam (14) and a roller wheel motion limiter (21) attached to the tilting linkage (20) such that, during tilting of the linkage when a load is applied on one roller wheel, a loading action is applied from the first to second roller wheel (11, 12) through the limiter (21) to increase the pressure uniformity of the track on the ground.