Steerable Track Assembly With Nested Gear Train for Smaller Vehicles
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Solution Overview
Problem
Conventional steerable track systems for vehicles, especially agricultural and construction vehicles, face issues such as increased ride height, unsuitability for smaller vehicles due to frame clearance limitations, and high weight, which can lead to ground compaction and traction problems on soft or uneven surfaces.
Innovation Solution
A steerable track system with a frame having a cavity and a gear train positioned inside, allowing for reduced weight and maintenance while maintaining structural strength, and designed to be fitted onto smaller vehicles without significantly raising the ride height, using a gear train and powertrain assembly to drive an endless track with track-supporting wheel assemblies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional track systems use a large drive sprocket to provide desired ground speed, then ground speed capability is improved, but the system becomes unsuitable for smaller vehicles due to frame clearance limitations
Solution Approach 1:
The gear train is nested within the drive sprocket assembly, with gears positioned inside the cavity of the drive sprocket structure. This nesting allows the gear train to occupy space that would otherwise be empty, enabling compact packaging of the power transmission system that fits within frame clearance limitations of smaller vehicles while maintaining the necessary ground speed capability through proper gear ratio selection
2Speed
If conventional track systems use a large drive sprocket for desired ground speed, then ground speed is improved, but the overall vehicle height increases
Solution Approach 1:
The drive sprocket assembly is designed with a hollow cavity that accommodates the gear train internally. This dimensional reorganization places the power transmission components in the radial dimension rather than extending them axially outward, allowing the drive assembly to maintain the necessary ground speed capability through gear ratios while keeping the outer diameter compact to avoid increasing vehicle height
3Strength
If conventional track systems use traditional structural design, then structural strength is maintained, but weight increases leading to ground compaction
Solution Approach 1:
The drive sprocket assembly uses a hollow cavity structure with strategic wall thickness distribution. The cavity walls are thickened in regions subject to high stress (such as the outer perimeter and mounting flanges) while thinner sections are used in low-stress areas. This local quality variation maintains structural strength where needed while reducing overall weight to minimize ground compaction
Data Source
AI summary
A steerable track system usable with a vehicle that has a chassis, an axle frame extending laterally outwardly from the chassis and having an attachment portion at an end thereof to which the steerable track system is connectable, and a driven shaft extending laterally outwardly from the chassis suitable for driving the steerable track system. The steerable track system has a frame having a cavity defined therein and being operatively connectable to the axle frame so as to be pivotable about a steering axis for steering the track system, and a gear train with components disposed in the cavity. The gear train transmits driving forces from the driven shaft to a driven wheel assembly of a plurality of track-supporting wheel assemblies. An endless track extends around the track-supporting wheel assemblies and is drivable by the driven wheel assembly.