Pivot Link With Opposite Threads For Sheet Bending Brake

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Solution Overview

Problem

Sheet bending brakes face challenges in providing adjustable clamping force to accommodate different material thicknesses and ensuring durability against clamping forces, as existing pivot links may yield or bend under stress.

Innovation Solution

A pivot link with an arm portion and a locking bar portion connected by a threaded stud, featuring opposite thread forms, allows for efficient adjustment and prevents vibration, eliminating the need for a retention mechanism by ensuring secure engagement and precise movement between the locking bar and pivoting arm.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a conventional pivot link is used, then the structure is simple, but the link may yield or bend under clamping forces, reducing durability

Engineering Contradiction:

Improvedurability of pivot linkVSAvoidcomplexity of pivot link structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The pivot link is divided into multiple segments: a first portion connected to the locking bar, a second portion connected to the pivoting arm, and a threaded stud interconnecting them. This segmentation allows each part to be optimized for its specific function while distributing mechanical stresses across multiple components, preventing yield or bend under clamping forces.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If the pivot link is made adjustable for different material thicknesses, then adaptability improves, but the adjustment mechanism increases complexity

Engineering Contradiction:

Improveadjustability for material thicknessVSAvoidcomplexity of adjustment mechanism

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The adjustment mechanism replaces complex mechanical retention systems with a threaded stud featuring opposite hand threads. This threaded connection provides both adjustment capability for different material thicknesses and inherent vibration resistance through the opposing thread directions, eliminating the need for additional retention mechanisms.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Productivity

If the threaded stud uses opposite thread forms, then adjustment speed increases and vibration is prevented, but manufacturing complexity increases

Engineering Contradiction:

Improvespeed of adjustmentVSAvoidease of manufacturing threaded stud

Core Design Contradiction:

ProductivityVSEase of manufacture

Solution Approach 1:

The threaded stud incorporates opposite hand threads (left-hand and right-hand threads) on different portions of the same stud. This parameter change in thread direction allows simultaneous engagement with two components moving in opposite directions during adjustment, enabling fast adjustment while the opposing threads naturally prevent vibration and loosening.

Inventive Principle:

Principle #35Parameter changes

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The pivot link enhances the speed of adjustment and durability, providing consistent clamping force across various material thicknesses without the need for additional retention mechanisms, thus improving the operational efficiency and reliability of the sheet bending brake.

Implementation Method 1

The threaded stud is disposed in threaded engagement with both the arm portion and the locking bar portion. The threaded stud includes a first thread portion in threaded engagement with the first threaded bore, and a second thread portion in threaded engagement with the second threaded bore.

Methodology Applied

Scientific EffectThreaded engagement: Screw

Implementation Method 2

The first threaded bore and the first thread portion include one of a left hand thread form or a right hand thread form, and the second threaded bore and the second thread portion include the other of the left hand thread form or the right hand thread form. The opposite thread forms prevent the stud from vibrating out of position.

Methodology Applied

Scientific EffectVibration prevention through opposite threading:

Data Source

PatentUS9283603B2Pivot link for bending brake

Publication Date: 2016.03.15 WESTLAKE ROYAL BUILDING PRODUCTS INC

AI summary

A pivot link for interconnecting a locking bar and a pivoting arm of a sheet bending brake includes an arm portion and a locking bar portion. The arm portion defines a first threaded bore, and the locking bar portion defines a second threaded bore. A threaded stud extends between and interconnects the arm portion and the locking bar portion, and is disposed in threaded engagement with both the arm portion and the locking bar portion. The threaded stud includes a first thread portion in threaded engagement with the first threaded bore, and a second thread portion in threaded engagement with the second threaded bore. The first threaded bore and the first thread portion include one of a left hand thread or a right hand thread, and the second threaded bore and the second thread portion include the other of the left hand thread or the right hand thread.