Tool-Free Pin Lock Assembly for Abrasive Mining Connections
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Solution Overview
Problem
Mining equipment, particularly dragline bucket systems, face significant downtime due to the abrasive nature of their operating environments, which leads to wear and tear on pin connections, requiring frequent maintenance and handling of heavy components, posing safety risks and efficiency challenges.
Innovation Solution
A pin assembly with a retainer system that securely locks pins in place, allowing for easy installation and removal without the need for separate handling of locks, using a design with aligned pin holes and retainer openings, and a lock mechanism that can be accessed and operated without tools, reducing the need for manual handling and maintenance time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional pin connections are used in mining equipment, then the equipment can operate in abrasive environments, but frequent maintenance and pin replacement are required due to wear
Solution Approach 1:
The pin connection system is segmented into modular components: the pin body, the retainer, and the locking mechanism. This allows individual parts to be replaced or maintained independently, reducing overall maintenance downtime while maintaining connection reliability in abrasive mining environments
Solution Approach 2:
The locking mechanism is pre-configured with a tool-free release system that allows operators to quickly unlock and replace worn pins without extensive disassembly. The retainer and locking components are designed in advance to enable rapid maintenance actions, minimizing equipment downtime
2Reliability
If pins are securely locked in place to prevent removal and turning, then connection reliability improves, but the locking mechanism becomes more complex
Solution Approach 1:
The locking mechanism is designed to be self-servicing through its tool-free operation. The release button and cam mechanism allow the operator to securely lock and unlock the pin using only manual hand operations, eliminating the need for external tools while maintaining simple overall system design
Solution Approach 2:
The retainer and locking mechanism are merged into a single integrated component assembly. The retainer body incorporates the locking features, release button, and cam mechanism as one unified unit, reducing the number of separate parts while achieving secure pin retention through reliable mechanical engagement
3Device complexity
If separate handling of locks and retainers is required, then the locking mechanism can be simple, but the handling of heavy components increases safety risks
Solution Approach 1:
The retainer and locking mechanism are combined into a single integrated assembly that moves as one unit during installation and removal. This eliminates the need for operators to handle heavy components separately, reducing safety risks while maintaining a relatively simple locking mechanism design
Solution Approach 2:
The retainer is pre-attached to the pin assembly during manufacturing, creating a pre-assembled unit that is handled as one component. This preliminary assembly action ensures that during field operations, operators only need to handle the complete pin-retainer-locking assembly, minimizing safety risks associated with handling heavy parts separately
Data Source
AI summary
A pin assembly for a component, such as a trunnion bracket, includes a pin received in pin hole of the component, and a retainer received in a retainer opening of the component to releasably secure the pin in the pin hole. The retainer can be secured to the pin, such that the pin and lock assembly rotate as a single component.