Hammerless Pin Assembly Lock Mechanism for Mining Equipment
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Solution Overview
Problem
Pins used in earth working equipment, such as mining rigs, wear quickly due to abrasive environments, requiring frequent replacement and posing hazards during installation and maintenance, which is time-consuming and costly.
Innovation Solution
A pin assembly with a hammerless lock mechanism that is integral to the component, allowing for easy installation and removal of pins without separate handling, reducing wear and operator risk, and featuring a threaded collar and lock pin for secure retention and release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional pins and retainers are used in earth working equipment, then the components can be joined and rotated, but the pins wear quickly in abrasive environments and require frequent replacement
Solution Approach 1:
The lock mechanism transitions from a static retained state to a dynamic released state, allowing the pin to be easily removed and replaced. The lock can move between positions to either secure or release the pin, enabling quick maintenance in abrasive environments without requiring complex disassembly procedures
2Reliability
If traditional retention plates are used to secure pins, then the pins can be retained, but cutting away and reattaching retention plates is time consuming and expensive
Solution Approach 1:
The retention system is segmented into a lock mechanism that can be independently operated from the pin and body. The lock can be released without affecting the integrity of the body or pin, allowing quick maintenance without time-consuming cutting and reattachment operations
Solution Approach 2:
The lock mechanism is designed to be easily discarded (removed) and recovered (reinstalled) during maintenance operations. The lock can be quickly detached from the body, the pin replaced, and the lock reinstalled, significantly reducing maintenance time compared to permanent retention plates
3Force
If heavy pins and components are used in mining equipment, then the equipment can handle extreme loads, but replacing pins requires heavy lifting equipment and proper alignment
Solution Approach 1:
The lock mechanism is preliminarily positioned within the body, ready for quick engagement and disengagement. The lock can be预先 installed in the body, so when pin replacement is needed, the operator only needs to manipulate the lock rather than handle the heavy pin itself, eliminating the need for heavy lifting equipment
Solution Approach 2:
The lock acts as an intermediary between the operator and the heavy pin. Instead of directly handling the heavy pin for removal and installation, the operator manipulates the lighter lock mechanism, which then controls the retention or release of the pin, making the operation safer and easier
4Reliability
If pins are frequently replaced in abrasive environments, then worn pins can be inspected and replaced, but the installation operation is hazardous for operators
Solution Approach 1:
The lock serves as an intermediary that allows operators to control pin retention from a safe position. The lock mechanism can be operated without requiring operators to be in hazardous positions near heavy moving components, reducing the risk of injury during pin replacement operations
Solution Approach 2:
The lock mechanism is preliminarily configured to allow safe operation. The lock can be designed with operational features that allow operators to release and secure pins from a safe distance or position, eliminating the need for operators to be in hazardous positions during maintenance operations
Data Source
AI summary
A pin assembly component for earth working equipment comprises a body including at least one opening into which a pin is received to couple the pin assembly component to at least one other part. A hole extends transverse to and communicating with the opening. A hammerless lock is secured in the hole and is adjustable to alternatively retain the pin in the opening and release the pin to permit installation and removal of the pin from the opening. The lock is retained to the body in the hole when holding the pin and when releasing the pin.