Interlocking Rivet Tool Jaws for Precise Reassembly Alignment

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Solution Overview

Problem

Existing blind rivet setting tools face challenges in maintaining accurate jaw alignment during reassembly, which can lead to ineffective rivet setting due to wear or the need to accommodate different rivet sizes and types.

Innovation Solution

A jaw assembly for blind rivet setting tools is designed with interlocking mechanisms that allow radial movement while restricting axial movement, ensuring accurate alignment and grip on the mandrel of blind rivets. Each jaw features gripping teeth and incorporates a retainer, such as an o-ring, to maintain radial alignment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the jaw assembly is designed to accommodate different rivet sizes and types, then the adaptability is improved, but the alignment precision during reassembly deteriorates

Engineering Contradiction:

Improveaccommodation of different rivet sizes and typesVSAvoidjaw alignment precision during reassembly

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The jaw assembly is divided into multiple individual jaws (typically three), each capable of independent movement and adjustment. This segmentation allows each jaw to be optimized for specific rivet sizes while maintaining overall alignment through the interlocking mechanism.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

An interlocking mechanism consisting of protrusions and corresponding recesses acts as an intermediary between adjacent jaws. This intermediary structure enables radial movement for adaptability while constraining axial movement to maintain alignment precision during reassembly.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If the jaws are allowed to move radially to grip different rivet diameters, then the adaptability is improved, but the axial stability deteriorates

Engineering Contradiction:

Improveradial movement for different rivet diametersVSAvoidaxial stability of jaw positioning

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The jaw assembly employs dynamic characteristics by allowing radial movement of individual jaws to adapt to different rivet diameters. The interlocking mechanism with protrusions and recesses enables this controlled movement while maintaining axial stability through geometric constraint.

Inventive Principle:

Principle #15Dynamics

3Ease of repair

If the jaw assembly is made disassemblable for maintenance and replacement, then the ease of repair is improved, but the alignment precision during reassembly deteriorates

Engineering Contradiction:

Improvejaw replacement and maintenanceVSAvoidjaw alignment precision during reassembly

Core Design Contradiction:

Ease of repairVSManufacturing precision

Solution Approach 1:

The jaw assembly is segmented into replaceable individual jaws that can be easily removed and replaced during maintenance. The standardized interlocking mechanism with protrusions and recesses ensures that replacement jaws align precisely with the same geometric constraints that guided original assembly.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentEP4311615B1Jaw assembly for a rivet setting tool

Publication Date: 2025.04.30 BLACK & DECKER CORP

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AI summary

A jaw assembly for a rivet setting tool the jaw assembly comprising a plurality of jaws each jaw defining part of an interlocking mechanism and an oppositely located part of another interlocking mechanism wherein adjacent jaws interlock via engagement of the parts of the interlocking mechanisms of the respective jaws for enabling radial movement of the jaws relative to each other while restricting axial movement of the jaws relative to each other.