Lattice System Connecting Element for Variable Angling

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Solution Overview

Problem

Existing methods for connecting lattice systems to telescopic boom heads are limited in flexibility and ease of operation, particularly in achieving multiple angling possibilities with single-handed operation or simple mechanical aids.

Innovation Solution

A connecting element comprising two adjustable butt straps of varying lengths or configurations, allowing for variable angle adjustments between upper and lower chords of a lattice system and a telescopic boom head, enabling multiple angling options through bolted connections and central or end-point fastening.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a single rigid connecting element is used to connect upper chords to the telescopic boom head, then structural simplicity is maintained, but flexibility in achieving multiple angling possibilities is lost

Engineering Contradiction:
Improveangling possibilitiesVSAvoidconnection structure
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The connecting element is divided into two separate butt straps instead of using a single rigid connector. Each butt strap can be independently positioned and connected to the upper chords, allowing for variable angling configurations while maintaining structural integrity through modular segmentation

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The connection structure transitions from a fixed rigid element to a dynamic configurable system. The two butt straps can be positioned at different locations on the upper chords and connected at various points, enabling the lattice system to be angled at multiple different angles depending on operational requirements

Inventive Principle:
Principle #15Dynamics

2Adaptability or versatility

If multiple connection points and adjustable butt straps are used to achieve variable angling, then adaptability is improved, but the difficulty of single-handed operation increases

Engineering Contradiction:
Improveangling possibilitiesVSAvoidsingle-handed operation
Core Design Contradiction:
Adaptability or versatilityVSEase of operation

Solution Approach 1:

The butt straps are pre-configured with multiple connection points and bore arrangements during manufacturing. This preliminary preparation allows the field operator to simply select and connect the appropriate points without complex adjustments, maintaining ease of operation while enabling multiple angling configurations

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The two butt straps act as intermediary elements between the upper chords and the telescopic boom head. They provide a simplified interface that mediates the connection process, allowing variable angling to be achieved through straightforward bolting operations rather than complex mechanical adjustments

Inventive Principle:
Principle #24Intermediary (Mediator)

3Ease of manufacture

If direct bolting of upper chords to the telescopic boom head is used, then ease of assembly is improved, but flexibility in angling configuration is lost

Engineering Contradiction:
Improveassembly simplicityVSAvoidangling possibilities
Core Design Contradiction:
Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The direct bolting connection is segmented into two separate butt strap components that can be independently positioned. This segmentation maintains assembly simplicity through standard bolting operations while introducing the flexibility to achieve multiple angling configurations by selecting different connection points

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The connection geometry is made variable by changing the positional parameters of the butt straps. The straps can be connected at different points on the upper chords and to different points on the telescopic boom head, allowing the angling parameter to be adjusted while maintaining ease of assembly through consistent bolting procedures

Inventive Principle:
Principle #35Parameter changes

Data Source

PatentUS8414214B2Element for connecting a lattice system
Publication Date: 2013.04.09 TADANO DEMAG GMBH
  • US8414214B2 patent drawing
  • US8414214B2 patent drawing
  • US8414214B2 patent drawing

AI summary

An element is provided for connecting the chords of a lattice system, which consists of upper chords and lower chords, between which struts and/or stays are arranged, to a telescopic boom head. Thereby, the lower chords are directly connected to the telescopic boom head by means of bolts, while the upper chords can be connected to the telescopic boom head by a connecting element of variable length in such a way that—with respect to the connection of the lower chords—the upper chords can be connected to one another at a variable angle, and wherein the connecting element consists of two butt straps which can each be fastened at one end of mutually facing ends of the upper chords and can be connected to one another at different points.