Electric Spike Puller With Guided Hollow Tube for Stable Rail Spike Removal
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing spike pullers for railroad spikes lack a simple and stable structure, leading to inefficient and unreliable spike removal, particularly when dealing with longer spikes and requiring ergonomic handling.
Innovation Solution
A spike puller with a housing, a linear displacement unit featuring a hollow tube guided within the housing, and an electric drive unit, allowing for a stable and efficient pulling mechanism with a maximum stroke height and modular length adaptation, along with a claw unit for engaging the spike and a carrying handle for ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional spike puller structure is used, then the device can perform basic spike removal, but the structure becomes complex and unstable, leading to unreliable operation
Solution Approach 1:
The device is divided into distinct functional modules: a housing unit, a linear displacement unit with hollow tube, a claw unit, and an electric drive unit. Each module performs a specific function and can be independently manufactured and assembled, reducing overall structural complexity while maintaining reliability through modular design.
Solution Approach 2:
The hollow tube serves as an intermediary guiding element between the linear displacement unit and the housing. It provides a simple yet effective guidance mechanism that ensures stable linear movement of the claw unit without requiring complex guiding structures, thus improving reliability while keeping the design simple.
2Stability of the object's composition
If the hollow tube is made large enough to prevent rotation, then guidance stability is improved, but the device size increases
Solution Approach 1:
The hollow tube has a polygonal cross-section (square, hexagonal, or octagonal) that matches the corresponding polygonal cross-section of the housing. This asymmetric geometric pairing prevents rotational movement of the tube within the housing while using minimal material, achieving guidance stability without excessive volume increase.
Solution Approach 2:
The hollow tube's outer dimension is made slightly larger than the housing's inner dimension in the radial direction. This excessive dimension in one direction (radial) provides sufficient guidance stability and prevents rotation, while the tube remains hollow to minimize overall volume and weight of the moving parts.
3Ease of operation
If the spike puller is designed for ergonomic handling, then ease of operation improves, but the device becomes heavier
Solution Approach 1:
A carrying handle is integrated into the housing, providing an ergonomic grip dimension that improves handling comfort. The handle extends in a direction perpendicular to the main body of the device, allowing the user to hold and maneuver the tool comfortably without significantly increasing the weight of the functional components.
Solution Approach 2:
The electric drive unit serves multiple functions: it provides the driving force for spike removal, and its integrated design with the housing creates a balanced weight distribution that facilitates ergonomic handling. The same structural components serve both functional and ergonomic purposes.
4Device complexity
If the linear displacement unit is guided directly in the housing, then the construction is simplified, but precision of guidance may be compromised
Solution Approach 1:
The hollow tube acts as an intermediary guiding element between the linear displacement unit and the housing. This simple tubular structure provides precise guidance for the linear displacement unit while maintaining construction simplicity, achieving both goals simultaneously through its geometric design.
Solution Approach 2:
The polygonal cross-section of the hollow tube (square, hexagonal, or octagonal) provides precise guidance by preventing rotational movement through geometric interlocking with the corresponding polygonal housing cross-section. This asymmetric design ensures accurate linear guidance without requiring complex machining or additional guiding components.
Data Source
AI summary
A spike puller for pulling a railroad spike of a track includes a housing, a linear displacement unit mounted at the housing, and a claw unit for gripping the railroad spike. The claw unit is displaceable in a linear manner relative to the housing in a displacement direction by using the linear displacement unit. The linear displacement unit includes a hollow tube which is guided in the housing. An electric drive unit electrically operates the linear displacement unit. A method for pulling a railroad spike of a track is also provided.