Telescoping Railroad Tool Pin Locking Mechanism
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Solution Overview
Problem
Existing tools for rotating railroad car wheel brakes and pivoting knuckle couplers require frequent ladder climbing, making the process time-consuming and dangerous for railroad employees.
Innovation Solution
A telescoping extension tool with a claw mechanism that allows for adjustable length and reduced rotation resistance, enabling the tool to be used without climbing ladders by extending and retracting with minimal force and preventing jamming, while incorporating anti-rotation features to secure the tool in place.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed-length tool is used for rotating railroad car wheel brakes, then the tool structure is simple, but the employee must climb ladders making the process time-consuming and dangerous
Solution Approach 1:
The tool is divided into two telescoping pole sections that can extend and retract relative to each other. The first pole section and second pole section are connected through bushings that allow sliding movement, enabling the tool length to be adjusted based on the distance to the brake wheel, thereby eliminating the need to climb ladders while maintaining a manageable tool size when not in use.
Solution Approach 2:
The tool incorporates a dynamic telescoping mechanism that allows the pole length to change during operation. The bushings enable smooth extension and retraction of the pole sections, providing the flexibility needed to reach brake wheels at various distances without requiring the employee to reposition themselves or climb ladders.
2Ease of operation
If a telescoping mechanism is added to the tool, then the tool can extend and retract without ladder climbing, but friction and jamming issues may occur
Solution Approach 1:
Bushings are introduced as intermediary components between the first pole section and the second pole section. These bushings facilitate smooth sliding movement between the telescoping sections, reducing direct metal-to-metal contact and minimizing friction that could cause jamming. The bushings act as mediators that enable reliable extension and retraction motion.
Solution Approach 2:
The tool incorporates features that change geometric parameters to prevent jamming. The second pole section includes a flattened portion that engages with a corresponding feature in the first pole section, creating an anti-rotation mechanism. This geometric modification ensures the poles maintain proper alignment during telescoping, preventing binding and jamming while enabling smooth extension and retraction.
3Weight of moving object
If the telescoping pole is made lightweight for easy carrying, then portability is improved, but structural strength may be compromised
Solution Approach 1:
The tool employs composite construction combining different materials to achieve both light weight and structural strength. The poles are designed to incorporate materials with favorable strength-to-weight ratios, and the bushings provide耐磨 surfaces that reduce friction during telescoping. This composite approach allows the tool to remain lightweight for easy carrying while maintaining the structural integrity needed to apply force to brake wheels.
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 tool allows for safe and efficient rotation of railroad car wheel brakes and pivoting of knuckle couplers without the need for ladder climbing, enhancing safety and reducing operational time by providing a lightweight, easy-to-carry solution with reduced friction and jamming issues.
Implementation Method 1
A spring biases the pin into the protruded position for extending into a selected one of the plurality of apertures of the second pole for fixing the position of the second pole relative to the first pole
Implementation Method 2
A lubricant sheet is coupled to the anti-rotation insert for positioning between the flatten portion and the anti-rotation insert and reducing friction between the second pole and the anti-rotation insert
Data Source
AI summary
An extension tool is disclosed and comprises a first pole and a second pole. The second pole is slidably received within the first pole. The second pole has a plurality of apertures. A pin is coupled to the first pole and is slidably positioned into a protruded position for engaging into the plurality of apertures of the second pole for terminating displacement of the first pole relative to the second pole. The pin is slidably positioned into a retracted position for disengaging with the plurality of apertures of the second pole for permitting displacement of the first pole relative to the second pole. A device, tool or support may be secured to the second end of the second pole.