Blind Rivet Nut Setting Tool Polygonal Stop Lock

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Solution Overview

Problem

Existing setting tools for blind rivet nuts face issues with unintentional adjustment of the setting stroke due to vibrations, leading to inconsistent deformation of blind rivet nuts in workpieces.

Innovation Solution

A setting tool with a stop element featuring a polygonal contour and a latching mechanism that can be moved between closed and adjustment positions, preventing rotational movement and ensuring secure positioning to prevent unintentional adjustments, allowing for precise adjustment of the setting stroke by rotating the stop element.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the stop element is screwed into the housing to adjust the setting stroke, then the setting stroke can be adjusted, but the position of the stop element can change independently due to vibrations

Engineering Contradiction:

Improveadjustability of setting strokeVSAvoidposition stability of stop element

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The locking means is designed to be movable between a locked position (where it engages with the polygonal contour to prevent rotation) and an unlocked position (where the stop element can be rotated for adjustment). This dynamic mechanism allows the system to switch between adjustable and fixed states, resolving the contradiction between adaptability and reliability.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The locking means acts as an intermediary element between the stop element and the housing. It mediates the interaction by providing a selective locking function that prevents unwanted movement while allowing intentional adjustment, thus ensuring position stability without compromising adjustability.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If the stop element is made accessible from outside for adjustment, then adjustment can be made without tools, but the setting stroke can be unintentionally adjusted

Engineering Contradiction:

Improvetool-free adjustmentVSAvoidprotection against unintentional adjustment

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The system uses a dynamic locking mechanism that requires intentional action to change state. The locking means can be moved to unlock the stop element for adjustment, but remains locked by default to prevent unintentional changes. This resolves the contradiction by making the system easily adjustable when needed while protected against accidental adjustment during normal use.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The locking means provides preliminary protection against unintentional adjustment by being in the locked position by default. This preliminary anti-action prevents harmful vibrations or accidental movements from changing the setting stroke, while still allowing intentional adjustment when the locking means is deliberately actuated.

Inventive Principle:

Principle #9Preliminary anti-action

Data Source

PatentEP2399712B1Setting device with a variable setting lift configuration

Publication Date: 2016.12.14 GESIPA BLINDNIETTECHNIK GMBH

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AI summary

The invention relates to a setting device (1) for blind rivet nuts with a variable setting stroke adjustment, wherein the setting stroke is adjustable by means of a stop element (5) that can be screwed into a housing (4). To prevent unintentional adjustment of the setting stroke, the stop element has a polygonal contour (11), wherein a locking means (9) in a closed position blocks a movement path of edges (12) of the polygonal contour (11) and releases it in an adjustment position.