Quad Track Skid-Steer Loader Conversion Mechanism
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Solution Overview
Problem
Wheeled skid-steer loaders lack the traction and reduced soil compaction benefits of track loaders, while track loaders are heavier and harder to transport, necessitating a conversion method that maintains the advantages of both types.
Innovation Solution
Converting wheeled skid-steer loaders into quad track skid-steer loaders by mounting track assemblies on each axle, with a single drive motor powering both track assemblies on each side, allowing for easy switching between wheel and track tractive elements using hubs and anti-rotation devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If track assemblies are mounted on each axle to improve traction and reduce soil compaction, then the machine becomes heavier and harder to transport
Solution Approach 1:
The patent implements a convertible system where the skid-steer loader can dynamically switch between wheeled and tracked configurations. The track assemblies are designed to be mounted or removed from each axle, allowing the machine to adapt its weight and traction characteristics based on operational requirements. This dynamic reconfiguration resolves the contradiction by enabling the machine to be light for transport and heavy for traction when needed.
Solution Approach 2:
The patent creates a multi-functional machine that can operate in both wheeled and tracked modes. The axles are designed to accommodate either wheels or track assemblies, making the machine universal in its capability. This allows the same base machine to serve dual purposes: wheeled operation for easy transport and tracked operation for improved traction and reduced soil compaction.
2Object-generated harmful factors
If track assemblies are mounted on each axle to improve traction, then the device complexity increases
Solution Approach 1:
The patent divides the track system into separate track assemblies, with each axle having its own independent track assembly. This segmentation allows for modular installation and removal, simplifying the conversion process. Each track assembly can be independently mounted or removed without affecting other axles, reducing the overall complexity of the conversion system.
Solution Approach 2:
The patent introduces hubs as intermediary components that facilitate the connection between axles and either wheels or track assemblies. These hubs serve as a standardized interface, simplifying the mounting process and reducing the complexity of direct connections. The hubs act as mediators that enable easy conversion between different tractive elements.
3Device complexity
If a single drive motor powers both track assemblies on each side, then the system becomes simpler, but the adaptability for different terrain conditions is reduced
Solution Approach 1:
The patent combines the drive function for both track assemblies on each side into a single drive motor per side. This merging approach simplifies the drive system by reducing the number of motors from four to two, while still maintaining the ability to provide differential speed control for steering. The single motor configuration reduces system complexity while preserving essential operational capabilities.
Data Source
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AI summary
Disclosed embodiments are directed to quad track skid-steer loaders and power machines having a frame (110, 210, 310), a cab (250), and a lift arm assembly (230, 330) pivotally coupled to the frame rearward of at least a portion of the cab and extending forward of the frame. A first axle assembly (227A, 327 A, 427 A) and a second axle assembly (227B, 327B, 427B) on a first side of the frame mount first and second track assemblies (419A, 419B). A third axle assembly (227C, 327C, 428C) and a fourth axle assembly (227D, 327D, 427D) on a second side of the frame mount third and fourth track assemblies (419C, 419D). A first drive motor (226A) rotates the first and second axles to drive the first and second track assemblies and a second drive motor (226B) rotates the third and fourth axles to drive the third and fourth track assemblies.