Track Chain Assembly with Segmented Links and Lubricated Pin
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Solution Overview
Problem
Traditional track chain assemblies are high-impact tolerant but have a short working life, while rotating bushing chains are low-impact tolerant and have a longer life, necessitating a solution that balances high impact tolerance with extended working life.
Innovation Solution
A track chain assembly featuring a link set and a unitary link with a bushing assembly that allows relative rotation, incorporating a pin with a lubricant reservoir, collars with apertures for pin accommodation, and reinforcement clips to enhance friction and prevent link walking, thereby increasing torsional rigidity and working life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional press-fit track chains are used, then high impact tolerance is achieved, but working life is short due to high torsional rigidity
Solution Approach 1:
The track chain is divided into two types of links: traditional press-fit links for high impact tolerance and rotating bushing links for extended working life. This segmentation allows the track to exhibit both high impact resistance and reduced torsional rigidity, resolving the contradiction between strength and duration of action.
2Duration of action of moving object
If rotating bushing chains are used, then working life is extended, but impact tolerance is reduced and susceptibility to seal leakage increases
Solution Approach 1:
The track chain alternates between rotating bushing links and press-fit links, creating a segmented structure where each link type contributes different properties. The rotating bushing links provide extended working life while the press-fit links maintain high impact tolerance, solving the contradiction between duration and strength.
Solution Approach 2:
Different sections of the track chain have different local qualities: rotating bushing links in areas requiring flexibility and longevity, and press-fit links in areas requiring impact resistance. This local differentiation allows the overall system to achieve both extended working life and high impact tolerance.
3Stability of the object's composition
If traditional press-fit construction is used, then high torsional rigidity is achieved, but seal leakage and dry joints occur more frequently
Solution Approach 1:
The track chain is segmented into rotating and press-fit links, allowing sections with reduced torsional rigidity (rotating links) to accommodate seal movement and prevent leakage, while maintaining overall structural stability through press-fit links.
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 achieves high impact tolerance with a longer working life by maintaining torsional rigidity and reducing the likelihood of seal leakage and dry joints, making the track chain assembly suitable for both high and low impact applications.
Implementation Method 1
The pin may also include first and second opposing ends. The bushing assembly may also include a left inner collar, a right inner collar, a left outer collar, and a right outer collar. The left inner collar may be coupled to the left portion of the unitary link. The right inner collar may be coupled to the right portion of the unitary link. Both the left inner collar and the right inner collar may include a first aperture for rotatably accommodating the pin.
Data Source
AI summary
In accordance with the present disclosure, a track chain assembly for a work vehicle may comprise of a link set, a unitary link, and a bushing assembly. The link set may include a first link and a second link. The unitary link may include a single link. The bushing assembly may couple the link set and the unitary link for relative rotation between the link set and the unitary link.