摘 要

本次设计的是MQ4050单臂架门座起重机变幅机构，主要内容为起重机总体设计包括确定起重机的总体结构型式及主尺寸；完成货物水平位移补偿系统设计；臂架自重平衡补偿系统设计；完成整机风载荷计算；整机重量重心计算；整机抗倾覆稳定性校验、轮压计算等。再完成变幅机构驱动电动机、减速器、联轴器、制动器等的选型计算。最后运用CAD软件进行绘图，SolidWorks软件进行三维建模。

关键词：起重机；总体设计；变幅机构；Solid works

Abstract

This design is MQ4050 single arm rack door crane luffing mechanism and main contents for crane overall design includes determining the crane's overall structure types and main dimensions; finished goods level displacement compensation system design; boom weight balancing compensation system was designed; the completion of machine wind load calculation;

Weight center of gravity calculation of the whole machine, the stability of the whole machine to check the stability of the wheel pressure calculation, etc.. Then complete the selection calculation of the driving motor, reducer, coupling, brake and so on. At last, the CAD software is used to draw, and the SolidWorks software is used to carry out the 3D model.

Keywords: crane; overall design; Luffing mechanism ; Solidworks

目 录

1. 绪论......................................................................................................................................1

1.1 目的和意义..............................................................................................................................1

1.2 本次设计的内容......................................................................................................................1

1. 总体设计计算......................................................................................................................2

2.1 主要技术参数..........................................................................................................................2

2.2 确定主要工作机构和金属结构的形式..................................................................................2

2.3 确定臂架结构主要尺寸..........................................................................................................6

2.4 吊重水平位移补偿系统的设计..............................................................................................7

2.5 杠杆——活对重法臂架自重平衡系统设计.........................................................................11

2.6 各工作机构和金属结构的计算工况及计算载荷及载荷组合............................................17

2.7 各支腿支承反力计算公式....................................................................................................28

2.8 整机抗倾覆稳定性计算........................................................................................................31

2.9 本章小结................................................................................................................................32

1. 变幅机构计算....................................................................................................................33

3.1 主要设计内容........................................................................................................................33

3.2 变幅阻力的计算....................................................................................................................34

3.3 电动机的选择与验算............................................................................................................34

3.4 制动器的选择与验算............................................................................................................36

3.5 减速器的选择........................................................................................................................37

3.6 高速轴联轴器的计算与选择................................................................................................37

第4章 运用SolidWorks软件变幅机构的三维建模................................................................38

4.1 变幅机构零部件的三维建模................................................................................................38

4.2 本章小结................................................................................................................................39

第5章 总结与展望.....................................................................................................................40

5.1 总结........................................................................................................................................40

5.2 经济性分析............................................................................................................................40

5.3 展望…………………………………………………………………………………………40

参考文献.......................................................................................................................................41

致谢...............................................................................................................................................42

1. 绪论

1.1 目的和意义