【正文】 I 摘 要 去年以來，我國(guó)專用車市場(chǎng)取得較好的經(jīng)營(yíng)業(yè)績(jī)，全國(guó) 395 家改裝車企業(yè)改裝汽車 萬輛，銷售 萬輛。自卸汽車 27125 輛，占總量的 ％ 。隨著國(guó)內(nèi)基礎(chǔ)設(shè)施建設(shè)需要不斷增加，自卸車產(chǎn)量近年來一直保持較高產(chǎn)銷量，在專用車綜合產(chǎn)量中保持第一位置，但在種類、型式、材料運(yùn)用方面與國(guó)外還有一定的差距。 本文首先對(duì)自卸車的設(shè)計(jì)特點(diǎn)以及國(guó)內(nèi)外發(fā)展現(xiàn)狀做了相關(guān)的概述。接著，從車廂的設(shè)計(jì)、舉升機(jī)構(gòu)的設(shè)計(jì)、取力器的設(shè)計(jì)等方面進(jìn)行了 EQ3090 自卸車的總體設(shè)計(jì)，并對(duì)主車副車架進(jìn)行了改裝與設(shè)計(jì)。對(duì)整個(gè) EQ3090 自卸車的外廓尺寸、輪距與軸距尺寸、前懸后懸以及整車的裝載質(zhì)量、整備質(zhì)量、總質(zhì)量和軸載質(zhì)量進(jìn)行了相關(guān)的計(jì)算與設(shè)計(jì)。 全套圖紙，加 153893706 關(guān)鍵字 ：自卸汽車 ； 總體布置 設(shè)計(jì) ； 副車架 ； 軸載質(zhì)量 ； 舉升機(jī)構(gòu) II ABSTRACT Since last year, our country Special Purpose Vehicle industry is in the boom, with 395 car refit enterprise all around the country refitting thousand cars, selling thousand. auto unload vehicle the 27125 car, account for % of total deal. along with the development of local foundation facilities, in recent years auto unload vehicle yield has been keeping in higher production amp。 sales, remains in the first place in Special Purpose Vehicle production. However, in aspects of category, pattern, material application, pared with foreign countries there is still a long way to go. In this paper, firstly, I made a general about the auto unload vehicle design and its development domestic and abroad. Then, at the point of partment, rising anization etc, I started the design of the EQ3090 auto unload vehicle. Also, I refit and designed the vicecar stalk. To whole EQ3090 the lading quantity, reanization quantity, measure, tread, wheelbase, forward suspension behind， proceeded the related calculation and design. Key words: auto unload vehicle； total arrangement； vicecar stalk； raising anizati III 目 錄 摘要 ......................................................................................................................................... I Abstract ................................................................................................................................. II 第 1 章 緒論 ........................................................................................................................1 專用自卸車的概述 ................................................................................................... 1 專用自卸車設(shè)計(jì)特點(diǎn)概述 ....................................................................................... 1 國(guó)內(nèi)專用自卸車發(fā)展現(xiàn)狀概述 ............................................................................... 3 第 2 章 總體設(shè)計(jì) ...............................................................................................................8 總體布置及主要參數(shù)的確定 ................................................................................... 8 參數(shù)的確定 ............................................................................................................... 8 底盤選擇 ................................................................................................................... 9 車廂尺寸計(jì)算 ........................................................................................................... 9 本章總結(jié) ................................................................................................................. 10 第 3 章 舉升機(jī)構(gòu)設(shè)計(jì) .................................................................................................... 11 直接推動(dòng)式舉升機(jī)構(gòu) ..............................................................................................11 最大舉升角的確定 ..................................................................................................11 油缸總行程 L 的確定 ............................................................................................. 12 油缸舉升力 .............................................................................................................. 12 液壓缸選取 ............................................................................................................. 13 本章總結(jié) ................................................................................................................. 15 第 4 章 車架的改裝 ........................................................................................................ 16 主車架的鉆孔和焊接 .............................................................................................. 16 主車架加強(qiáng)板的設(shè)計(jì) ............................................................................................. 17 副車架的設(shè)計(jì) ......................................................................................................... 18 縱梁與橫梁的連接設(shè)計(jì) ......................................................................................... 21 副車架與主車架的連接設(shè)計(jì) ................................................................................. 22 車架校核 ................................................................................................................. 23 功率和比功率計(jì)算 ................................................................................................. 25 本章總結(jié) ................................................................................................................. 26 第 5 章 液壓系統(tǒng)設(shè)計(jì) .................................................................................................... 27 油泵的選型計(jì)算 ..................................................................................................... 27 油箱設(shè)計(jì) .................................................................................................................. 27 液壓系統(tǒng) 原理 ......................................................................................................... 28 本章總結(jié) ................................................................................................................. 29 第 6 章 天龍自卸車動(dòng)力性能的計(jì)算 ........................................................................ 30 動(dòng)力學(xué)方程的建立 ................................................................................................. 30 發(fā)動(dòng)機(jī)外特性 ......................................................................................................... 31