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南京林業(yè)大學(xué)本科畢業(yè)設(shè)計
南京林業(yè)大學(xué)
本科畢業(yè)設(shè)計（論文）
題 目： 小型挖坑機的設(shè)計
學(xué) 院： 南方學(xué)院
專 業(yè)： 機械設(shè)計制造及其自動化
學(xué) 號： N090301122
學(xué)生姓名：
指導(dǎo)教師： 周
職 稱： 講師
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目錄
1 引言...................................................................................................................................................................... 5
2 方案對比與結(jié)構(gòu).................................................................................................................................................. 5
2.1 國內(nèi)外研究現(xiàn)狀...................................................................................................................................... 5
2.2 挖坑機的構(gòu)造.......................................................................................................................................... 7
2.2.1 挖坑機的工作條件...................................................................................................................... 7
2.2.2 挖坑機的分類............................................................................................................................... 7
2.2.3 挖坑機的鉆頭.............................................................................................................................. 8
3 手提式挖坑機的設(shè)計.......................................................................................................................................... 9
3.1 手提式挖坑機的工作原理...................................................................................................................... 9
3.2 動力選擇................................................................................................................................................ 11
3.3 螺旋鉆頭的設(shè)計和計算......................................................................................................................... 12
3.3.1 螺旋工作面的設(shè)計..................................................................................................................... 12
3.3.2 刀片的設(shè)計................................................................................................................................ 12
3.3.3 鉆尖的設(shè)計................................................................................................................................ 13
3.4 離合器的設(shè)計.......................................................................................................................................... 14
3.5 減速器的設(shè)計.......................................................................................................................................... 22
4 發(fā)展趨勢............................................................................................................................................................ 32
4.1 一機多能........................................................................................................................................ 32
4.2 人機和諧........................................................................................................................................ 32
4.3 應(yīng)用范圍........................................................................................................................................ 32 參考文獻................................................................................................................................................................ 33
摘要
本文介紹了手提式挖坑機的相關(guān)背景、國內(nèi)外研究現(xiàn)狀、挖坑機的設(shè)計要求及其類型、工作原 理、技術(shù)性能。通過對原始數(shù)據(jù)的分析比較、方案的論證以及綜合考慮，完成了手提式挖坑機的總體 設(shè)計。在此基礎(chǔ)上對手提式挖坑機從結(jié)構(gòu)原理、動力選擇 、離合器的設(shè)計、螺旋鉆頭的設(shè)計、減速器 設(shè)計進行闡述。擺線針輪行星減速器作為重要的機械傳動部件具有體積小、重量輕、傳動效率高的特 點。本設(shè)計在全面考慮多齒嚙合、運轉(zhuǎn)平穩(wěn)、輪齒均載等運動學(xué)和動力學(xué)的要求，實現(xiàn)高承載能力、 高傳遞效率、高可靠性和優(yōu)良動力學(xué)性能等指標(biāo)，而且要便于制造、裝配和檢修，設(shè)計了該具有合理 結(jié)構(gòu)的擺線針輪行星減速器。
本設(shè)計建立了合理的動力分析數(shù)學(xué)模型，對擺線針輪傳動中的擺線輪、轉(zhuǎn)臂軸承、柱銷及軸進行 準(zhǔn)確的受力分析，并其求解。計算并校核主要件的強度及轉(zhuǎn)臂軸承、各支承軸承的壽命，分析結(jié)果可 以看到，各軸承性能指標(biāo)均符合要求。
利用Auto CAD軟件對擺線針輪減速器各零件建立幾何三維模型、擺線針輪減速器虛擬裝配及工程 圖生成。用本文的方法設(shè)計擺線針輪減速器，具有設(shè)計快捷、方便等特點。研究結(jié)果對提高設(shè)計的速 度、質(zhì)量具有重要意義。
Abstract：
This article introduces the portable digger including the relevant background ， overseas and domestic research status ， the design requirements and the type of the digger ， operating principle ， technical characteristic 。 By analysising and comparing the the original data，The cycloid—gear reducer is one of the most important transmission components of the pumping unit by its smaller volume ， lighter weight and effective transmission. In order to realize four targets which include high transmission efficiency, high reliability and the excellent dynamics performance and guarantee credible lubricate ability, receive high efficiency of transmission, and make it easy for manufacture, assembly and inspection, we thought over all the requests in the round and design the rational structure cycloid—gear reducer.
In this design，we built the exact force analysis mathematical
model of the cycloid—gear reducer, analyzed the forces born by the cycloid-gear, the bearings and the shaft, and produce the Matlab language software analyze of the forces analysis. We analyzed the forces of parts in the cycloid—gear reducer and calculated the intensity and the life of parts. From analyzed the results, we found the parts are our requests.
When we establish the three—dimensional structure of the Planet—cycloid
Reducer model with the software UG，Carry on visual design and virtual assemble
and drawing paper．The result of study have the guide meaning to accelerate design speed and quantities of the Planet—cycloid Reducer．
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