Segmented Pin Retention System for Track Treads
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Solution Overview
Problem
Existing pin retention systems for track-type treads in mining and construction machinery are prone to wear and require frequent maintenance, leading to increased downtime and reduced efficiency due to the difficulty in easy and quick installation and removal of pins in rugged operating conditions.
Innovation Solution
A retention system featuring a segmented pin bore and retention pin with a dowel pin configuration that allows for easy installation and removal, utilizing a tubular bushing and retention cap to secure links together, limiting axial movement and protecting components from damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional pin retention system is used, then the pin can be retained in the tread links, but the system is prone to wear and requires frequent removal and installation
Solution Approach 1:
The retention pin is divided into multiple segments that can be independently removed and reassembled. This segmentation allows the pin to be quickly disassembled without removing the entire retention system, significantly reducing machine downtime while maintaining secure retention during operation.
Solution Approach 2:
The retention system transitions from a static, fixed pin design to a dynamic, adjustable segmentation system. The pin can be dynamically reconfigured by removing and reassembling segments, enabling quick maintenance and adaptation to different operational conditions while maintaining reliability.
2Ease of operation
If the retention system is designed for easy removal and installation, then machine downtime is reduced, but the system may become less secure or more complex
Solution Approach 1:
The pin is segmented into modular sections that can be easily detached and reattached using simple tools or even hand operations. This segmentation simplifies the removal and installation process while the modular design actually reduces overall system complexity compared to traditional fixed pins requiring specialized tools.
Solution Approach 2:
The retention system extracts the essential function of pin retention from a complex fixed structure and implements it through simpler, removable segments. This extraction allows the pin to be easily removed and installed without requiring complex mechanisms, maintaining security through the segments' interlocking design.
3Duration of action of stationary object
If the retention system components are made durable to withstand rugged conditions, then the useful life of parts is increased, but the weight and complexity of the system increase
Solution Approach 1:
The retention pin is divided into multiple segments that can be individually replaced when worn. This segmentation allows only the worn segment to be replaced rather than the entire pin, extending the overall system life while keeping individual segments lighter and easier to manufacture from durable materials.
Solution Approach 2:
The segmented design enables selective replacement of worn pin segments while retaining and reusing the non-worn segments. This approach maximizes the useful life of the retention system by recovering and reusing durable components, reducing the need to replace the entire pin assembly and thereby reducing overall system weight.
Data Source
AI summary
A machine tread including a first and second pair of plates. The plates have corresponding first ends and second ends, and the second ends of the first pair include outer bores. The first ends of the second pair include aligned bushing bores. The first ends of the second pair fit between the second ends of the first pair, aligning the outer and bushing bores. Ends of a bushing including an inner bore engage the bushing bores forming a pin bore through the inner and outer bores. A retention pin fits in the segmented pin bore. A head end abuts an external surface of the first pair of plates and a locking end extends past the pin bore. A retention cap engages the locking end. A dowel pin fits through a dowel pin bore in the retention cap and the locking end to limit movement of the retention pin.