Excavator Wear Part Locking Pin Assembly Against Loosening
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Solution Overview
Problem
Existing connection systems for worn parts of excavation equipment face issues with low transmission efficiency, laborious installation, and instability due to constant rubbing and squeezing, leading to wear and tear.
Innovation Solution
A stable connection system using a rotating locking pin with parallel threads and a taper portion that compresses components to secure the worn part to a lip plate, combined with an anti-loosening mechanism and fine-tuning components for adaptive positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a thread connection between wedge and tube is used, then the component can be driven in and out without hammer or pry, but the constant rubbing and squeezing causes wear and reduces reliability
Solution Approach 1:
The connection system is divided into separate functional components: a pin body for insertion, a groove for positioning, and a locking mechanism with anti-loosening features. This segmentation allows each component to perform its specific function optimally without the constant rubbing and squeezing that occurs in direct thread connections.
Solution Approach 2:
The patent converts the potential harm of friction and squeezing into beneficial locking features. The groove structure and anti-loosening design utilize controlled friction and positioning to prevent unwanted movement while maintaining easy installation, transforming the harmful effects of contact into stable locking mechanisms.
2Ease of operation
If a rotating locking pin with thread connection is used, then installation is simplified, but the transmission efficiency becomes laborious and complex
Solution Approach 1:
The patent extracts the threading function from the main pin body and places it in a separate fitting part. This allows the pin to be inserted and positioned independently, then locked into place, separating the insertion operation from the locking operation and improving overall transmission efficiency.
Solution Approach 2:
The groove is pre-formed in the worn part to receive and position the pin body before final locking. This preliminary positioning action simplifies the subsequent locking operation and improves transmission efficiency by eliminating the need for complex alignment procedures.
3Device complexity
If a direct connection between wedge and tube is used, then the number of components is reduced, but the fit causes constant rubbing and squeezing leading to wear
Solution Approach 1:
The groove acts as an intermediary element between the pin body and the worn part. It provides a controlled interface that prevents direct rubbing and squeezing while maintaining connection stability, effectively mediating the interaction between components.
Solution Approach 2:
The locking mechanism incorporates dynamic anti-loosening features that adapt to operational conditions. The anti-loosening groove and positioning features allow the connection to dynamically adjust to thermal expansion, vibration, and load variations, preventing wear while maintaining stability.
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 system provides high transmission efficiency, easy installation, and enhanced stability by limiting axial displacement and preventing loosening, ensuring firm fixation of worn parts.
Implementation Method 1
the taper portion compresses the front-rest component and backrest component so that front-rest component abuts forward against the lip plate body and the backrest component abuts backward against the worn part
Implementation Method 2
the connection portion and the fitting part are connected in an insertion manner and twisted in a thread manner; the rotating locking pin rotates and moves axially in the pin channel
Data Source
AI summary
A stable connection system for fixing a worn part of an excavation equipment and an assembly method thereof are provided, the connection system includes a worn part, a lip plate, a backrest component, and a rotating locking pin; a fitting part is provided on the backrest component or lip plate, the fitting part is provided with a second parallel thread; the rotating locking pin includes a connection portion providing with a first parallel thread on a lower and a taper portion on an upper; the rotating locking pin is provided between the backrest component and the lip plate, the connection portion and the fitting part are connected in an insertion manner and twisted in a thread manner; the rotating locking pin rotates and moves axially. The taper portion compresses the backrest component and the lip plate so as to fix the worn part on the lip plate.