挖掘機吊掛之結構安全設計探討

Investigation in Safety Design for Excavator：lifting

林俊宏(Chun-Hung Lin)

指導教授 ： 張永鵬 ； 康淵

中原大學/工學院/機械工程研究所/碩士(2011年)

https://doi.org/10.6840/cycu201101062

摘要

本文針對挖掘機執行吊掛作業之結構設計進行探討，挖掘機於英、美、德、日等先進國家早已制定使用挖掘機進行吊掛作業之相關法規，而且挖掘機在營造工地用於物料吊運有其必要性及實用性。為了從工程技術的觀點探討挖掘機實施吊掛作業之安全基準，本文分析挖掘機吊掛力學特性及構造強度，由挖掘機工作空間之機構分析，得到其大臂、小臂及鏟斗重心位置在不同姿態下之改變，進而求得其不同姿態下單位吊掛重量之內力及內力，以及翻覆力矩對應之臨界吊掛重量，將內力及內力矩代入大臂及小臂的有限元素模型進行應力分析，得到機器結構之材料強度所能承受的吊掛重量限界，因而避免挖掘機發生翻覆或結構發生永久性的破壞，最後根據國內外銲接技術相關標準及規範，對挖掘機銲接結構強度及銲接檢驗進行探討，藉由上述之分析方法確保挖掘機實施吊掛作業之安全性。

關鍵字

應力分析 ； 穩定性 ； 力學特性 ； 吊掛作業 ； 挖掘機

並列摘要

The paper aims to investigate into structural design for excavator hanging work. In UK, USA, Germany, Japan and other advanced countries have developed the use of excavators for hanging work regulations, and the excavator in the construction site is necessary for lifting materials and practicality. From the engineering point of view to investigate the safety of excavators implementation hanging operation basis, the paper analyzes the mechanical properties of excavators and construction strength of hanging by the space agencies of excavator to get the big arm, arm and bucket center of gravity the change in a different posture, and then obtained his unit hanging under the weight of the different attitude of the internal forces and internal forces, and overturning moment of the corresponding critical hanging weight, the internal force and torque on behalf of the arm and forearm into the finite element model for stress analysis, the strength of the material structure of the machine can bear the weight of hanging and bound, and thus avoid the occurrence of rollover or structure excavator permanent damage, and finally, According to domestic and international standards and regulations for welding, investigating Strength of welded structures and Welding inspection of excavator. Ensure that by the above analyze it is safety when use of excavators for hanging work.

並列關鍵字

stability ； stress analysis ； Excavator ； hanging operation ； mechanical characteristics

參考文獻

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