Replaceable Jaw Tips for Extraction Tongs
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Solution Overview
Problem
Existing extraction tongs with jaw tips for salvaging vehicles face wear issues, necessitating replaceable jaw tips that must be fully secured to the tong, but existing solutions lack effective mating gripping projections for secure attachment.
Innovation Solution
The design features a tapered body with inward teeth, reduced thickness for jaw tip extensions, and mating triangular projections and slots with counterbore holes for secure attachment using bolts and hex nuts, ensuring a wedge fit and flush fasteners for enhanced retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If jaw tips are made replaceable, then wear resistance is improved through replacement, but attachment security deteriorates without effective mating projections
Solution Approach 1:
The jaw tip is segmented into a replaceable component that can be separated from the tong body. The jaw tip includes a body portion with gripping surfaces and a separate attachment portion that interfaces with the tong, allowing the wear-prone gripping surfaces to be replaced while maintaining a secure mechanical connection through the attachment portion.
Solution Approach 2:
The attachment mechanism uses asymmetric triangular projections on the jaw tip that mate with corresponding triangular slots in the tong body. This asymmetric geometry provides a wedge-fit connection that prevents rotation and ensures secure attachment, with the projections fitting precisely into the slots to create a reliable mechanical bond.
Solution Approach 3:
The attachment system uses nested fastening elements where bolts pass through aligned holes in both the jaw tip and tong body, with hex nuts securing the connection on the opposite side. The counterbore holes provide nested recesses that accommodate the bolt heads and nuts, creating a multi-layered secure attachment system.
2Reliability
If jaw tips are securely attached, then reliability is improved, but ease of replacement deteriorates
Solution Approach 1:
The jaw tip is designed as a segmented component with distinct attachment features (triangular projections and aligned holes) that separate the secure attachment function from the replacement function. The segmentation allows for straightforward removal by accessing the fastening elements through the aligned holes while maintaining secure operation during use.
Solution Approach 2:
The attachment mechanism transitions from a static secure connection during operation to a dynamic, easily accessible fastening system during replacement. The aligned holes and external hex nuts allow maintenance personnel to quickly access and manipulate the fastening elements without disassembling complex structures, enabling rapid replacement while ensuring secure attachment during extraction operations.
Data Source
AI summary
Extraction tongs with replaceable jaw tips include jaw tips with mating gripping projections. Each extraction tong includes a plurality of inward extending teeth. A thickness of the extraction tong is reduced at a bottom to form a jaw tip extension. A substantially triangular projection extends outward from opposing sides of the jaw tip extension. A plurality of holes are formed through the jaw tip extension. Each jaw tip includes a tong slot, which is sized to receive the thickness of the jaw tip extension. A substantially triangular slot is formed in opposing walls of the tong slot to receive the two substantially triangular projections. A plurality of counterbore holes are formed in opposing sides of the jaw tip. A first lengthwise projection is formed on a gripping surface of the first jaw tip. A pair of second lengthwise projections are formed on a gripping surface of the second jaw tip.