Caterpillar Track Inner Traction Members for Non-Slip Wheel Contact
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Solution Overview
Problem
Caterpillar tracks on forest work machines face challenges in maintaining traction on poor terrain conditions due to low friction caused by snow or mud, leading to slipping and potential damage to wheel bearings, especially when ice forms between the track and tire, and tightening the track around a single wheel is difficult without stressing the bogie structure.
Innovation Solution
Incorporating traction members on the inner surface of the caterpillar track that adapt to the wheel surface, allowing for non-slip contact without over-tightening, self-cleaning, and breaking ice to maintain traction and prevent structural damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the caterpillar track is tightened very tight around the wheels to prevent slipping, then the traction between the wheel and caterpillar track is improved, but the bogie structure is stressed and wheel bearings are damaged
Solution Approach 1:
The caterpillar track incorporates grouser shoes with different functional characteristics - the inner surface has a smoother finish for reduced friction and适应ability to wheel surface, while the outer surface has aggressive lugs for terrain engagement. This local differentiation allows the track to provide adequate traction without requiring excessive tightness that would stress the bogie structure.
Solution Approach 2:
The patent modifies the surface characteristics of the caterpillar track by providing an inner surface with a specific finish (smoother than the outer surface) and incorporating traction members. This parameter change in surface texture and composition allows the track to maintain reliable traction through improved contact quality rather than increased tension, thereby protecting the bogie structure and bearings.
2Reliability
If the caterpillar track is tightened very tight around a single wheel to prevent slipping, then the traction is improved, but the installation becomes difficult and the wheel bearings are damaged
Solution Approach 1:
The caterpillar track features an inner surface with a smoother finish specifically designed for easier contact with the wheel, reducing the tightness required for proper installation and adjustment. This local quality differentiation allows the track to be installed on a single wheel without excessive stress while maintaining reliable traction.
3Reliability
If the caterpillar track is tightened tight under snow conditions to prevent slipping, then the traction is improved, but the ice layer increases the tension and reduces traction
Solution Approach 1:
The patent changes the surface parameters of the caterpillar track by providing an inner surface with a smoother finish and incorporating traction members that can adapt to icy conditions. This allows the track to maintain adequate friction and break through ice layers without requiring excessive tightness, thereby reducing the tension in the caterpillar track while preserving traction.
4Ease of operation
If the caterpillar track is left untightened to ease installation around a single wheel, then the ease of installation is improved, but the traction between wheel and caterpillar track is lost
Solution Approach 1:
The caterpillar track incorporates an inner surface with a smoother finish and traction members specifically positioned to optimize contact with the wheel. This local quality enhancement allows the track to maintain reliable traction even when installed with less tightness, facilitating easier installation around a single wheel while preventing slippage.
Solution Approach 2:
The caterpillar track design with its specialized inner surface and traction members allows it to self-adjust and maintain adequate contact with the wheel without requiring excessive pre-tightening. The structure enables the track to find its own optimal contact state, providing reliable traction while easing installation.
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 ensures consistent traction on both single and multi-wheel setups, prevents ice buildup, and reduces the risk of damage to the bogie structure by allowing for easy installation and movement, even in challenging conditions.
Implementation Method 1
the required friction between a wheel of the work machine and the caterpillar track may be low due to snow or mud
Implementation Method 2
the traction members break the ice on the caterpillar track and therefore prevent the ice between the wheels and caterpillar track increasing the tension
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a caterpillar track of a work machine, comprising a support structure (42, 44) formed into a loop and a plurality of successive grouser shoes (32, 34, 36) supported by it, and the caterpillar track (30) having an outer surface (52), inner surface (54), a first side edge (56), and a second side edge (58). On the inner surface (54) side of the caterpillar track (30), the caterpillar track comprises traction members (62, 64, 66) implemented with a chain, cable, rope, or another form-conformable structure.