Rail Tie Gripper Fingers With Teeth For Replaceable Segmented Jaws
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Solution Overview
Problem
Conventional railroad tie replacing machines have unitary jaws that wear unevenly, requiring replacement of the entire unit when one end is worn, leading to increased maintenance efforts and costs, as well as stress on attachment points due to reciprocal movement of extending members.
Innovation Solution
A rail tie gripping mechanism featuring a pair of gripper levers with individually replaceable gripper fingers, each with a plurality of teeth for secure grasping, and a fastener system for easy detachment and replacement, reducing maintenance time and costs, and distributing load across a larger area to prevent damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If unitary jaws are used in conventional gripping mechanisms, then the structure is simple and strong, but maintenance becomes difficult and time-consuming when wear occurs
Solution Approach 1:
The gripping mechanism is divided into multiple independent gripper fingers that can be separately replaced. Each finger is a separate component attached to the gripper lever, allowing individual replacement without replacing the entire gripping assembly. This segmentation enables easier maintenance while keeping the overall structure relatively simple.
2Productivity
If unitary jaws are used, then manufacturing is simpler, but replacement costs and time increase significantly
Solution Approach 1:
The jaw is segmented into multiple independent fingers, so only the worn portions need replacement rather than the entire unit. This reduces maintenance time and material costs while maintaining manufacturing simplicity through standardized finger designs.
Solution Approach 2:
The design allows selective replacement of only the worn gripper fingers while retaining the unused fingers and the gripper lever assembly. This partial discarding approach reduces waste and maintenance time compared to replacing the entire unitary jaw.
3Reliability
If conventional jaws are used, then the gripping force is sufficient, but uneven wear occurs requiring complete replacement
Solution Approach 1:
The jaw is divided into multiple fingers that can be independently replaced. This segmentation allows the system to maintain high gripping reliability through proper finger design while making repair easy by replacing only the worn fingers rather than the entire jaw assembly.
4Adaptability or versatility
If reciprocating extending members are used, then the gripping mechanism can remove and insert ties, but stress concentrates on attachment points
Solution Approach 1:
The gripping mechanism uses multiple fingers distributed across the gripper lever, which segments the gripping function. This distribution helps spread the stress from reciprocating motion across multiple attachment points rather than concentrating it at a single location, while maintaining the ability to perform both removal and insertion operations.
Data Source
AI summary
A gripping mechanism is provided for use with an apparatus for removing and inserting a rail tie that needs repair or replacement from a railroad track, and includes at least one gripper lever constructed and arranged to be actuated between a closed position and an open position, and a plurality of gripper fingers. Each gripper finger is configured for being individually attachable to and removable from a corresponding one of the at least one gripper lever for grasping the rail tie.