Hydraulic Pin Puller Assembly With Modular Column Reach
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Solution Overview
Problem
Heavy equipment pins, such as those found on construction sites and farms, are difficult to remove due to their weight and potential rusting, necessitating improved mechanisms and methods for extraction.
Innovation Solution
A pin puller assembly comprising a piston-cylinder unit, a pull rod, a reaction member, and a column assembly, which includes a first and second column member, is designed to facilitate the removal of pins by leveraging hydraulic fluid to extend the piston, transferring force through the pull rod and column assembly to extract the pin from a machine frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If manual removal methods are used, then the device complexity is low, but the ability to remove heavy and rusted pins is insufficient
Solution Approach 1:
The patent employs a hydraulic piston-cylinder unit to generate the necessary pulling force for extracting heavy and rusted pins. Hydraulic fluid is introduced into the cylinder chamber, causing the piston to move and transfer force through the pull rod to the pin, providing sufficient force without requiring overly complex mechanical systems
Solution Approach 2:
The column assembly is divided into multiple modular column members that can be individually assembled and disconnected. This segmentation allows the system to achieve the required length and force transmission capability while maintaining ease of assembly and disassembly, balancing force requirements with operational simplicity
2Length of moving object
If a long pull rod is used to reach deep pins, then the reach is improved, but the device becomes more difficult to handle and position
Solution Approach 1:
The column assembly is segmented into multiple column members that can be assembled in sections. This allows the overall length to be adjusted based on the pin depth while maintaining manageable individual component sizes that are easier to handle and position during assembly and operation
3Strength
If a robust single-piece column is used, then the structural strength is high, but the assembly and disassembly process becomes time-consuming
Solution Approach 1:
The column is divided into multiple column members that can be independently assembled and disconnected. Each segment maintains the necessary structural strength while the modular design enables rapid assembly and disassembly operations, significantly reducing the time required compared to a single-piece construction
Solution Approach 2:
The column assembly transitions from a static single-piece structure to a dynamic modular system that can be configured as needed. The column members can be assembled in different configurations and easily disassembled when the pin removal is complete, providing both strength and operational flexibility
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 assembly effectively and efficiently removes pins from recesses by providing a robust mechanism that can handle the force required, even when pins are heavy and rusted, by using hydraulic power and a modular column assembly for extended reach.
Implementation Method 1
fluid passing through the port causing movement of the piston relative to the cylinder
Implementation Method 2
transferring force through the pull rod and column assembly to extract the pin
Data Source
AI summary
A pin puller assembly, a column assembly, and methods of assembling and operating a pin puller assembly. The pin puller assembly may be operable to pull a pin from a machine having a frame supporting the pin. The pin puller assembly may generally include a piston-cylinder unit; a pull rod positionable through a piston passage, the second rod end being connectable to the pin to be pulled; a reaction member engageable between the rod and the piston; and a column assembly positionable between the cylinder and the frame, the column assembly including a first column member connectable to the cylinder and having a first length along the axis, and a second column member releasably lockable to the first column member and having a second length along the axis. The reaction member may include a split reaction member assembly.