Fast Assembly Head for Telescopic Boom Self-Assembly

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Solution Overview

Problem

Mobile cranes with separable telescopic booms are not usable for work deployments when disassembled, as they lack the pulley head necessary for lifting loads, and independent assembly is not possible without reattaching the inner boom set.

Innovation Solution

A fast assembly head for a telescopic boom that can be separated into an inner and outer boom set, featuring a pulley head with deflection pulleys and a telescopic tube section that can be reversibly mounted on the inner telescopic section of the outer boom set, allowing for independent use of the crane before reassembly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Weight of moving object

If the inner boom set is removed to reduce weight for road transport, then the weight for road transport is reduced, but the mobile crane becomes unusable for work deployments without the pulley head

Engineering Contradiction:

Improveweight for road transportVSAvoidusability for work deployments

Core Design Contradiction:

Weight of moving objectVSAdaptability or versatility

Solution Approach 1:

The boom is divided into separable inner and outer boom sets, allowing the inner boom set to be removed for transport while the outer boom set with assembly head remains usable for work deployments

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

An assembly head with pulley head is introduced as an intermediary component that can be mounted on the outer boom set to enable work deployments even when the inner boom set is removed for transport

Inventive Principle:

Principle #24Intermediary (Mediator)

2Weight of moving object

If the inner boom set is dismantled for road transport, then road transport weight is reduced, but independent assembly is not possible without reattaching the inner boom set

Engineering Contradiction:

Improveroad transport weightVSAvoidindependent assembly capability

Core Design Contradiction:

Weight of moving objectVSEase of manufacture

Solution Approach 1:

The assembly head is designed to enable the mobile crane to perform independent assembly operations without requiring the reattachment of the inner boom set, allowing the crane to assemble itself or perform work independently

Inventive Principle:

Principle #25Self-service

3Adaptability or versatility

If a complete pulley head is provided on the assembly head, then the mobile crane can be used for work deployments before reassembly, but the assembly head becomes more complex

Engineering Contradiction:

Improveusability before reassemblyVSAvoidassembly head complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The assembly head is designed with a complete pulley head that serves multiple functions: enabling work deployments before reassembly, facilitating independent assembly operations, and maintaining compatibility with the outer boom set

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12286332B2Fast assembly head for a telescopic boom and method of assembling same

Publication Date: 2025.04.29 LIEBHERR WERK EHINGEN

AI summary

The disclosure relates to an assembly head for a telescopic boom that can be separated into an inner and an outer boom set and that is reversibly mountable at an inner telescopic section of the outer boom set. The assembly head comprises a pulley head having deflection pulleys and a telescopic tube section that is arranged the pulley head, that can be pushed into the inner telescopic section from its end, and that has a substantially smaller length than the inner telescopic section. The disclosure further relates to a separable telescopic boom having an assembly head in accordance with the disclosure, to a mobile crane having a telescopic boom in accordance with the disclosure, and to a method for the self-assembly of an assembly head in accordance with the disclosure at the outer boom set of a telescopic boom.