【正文】 目 錄 第 1 章 緒論 ........................................................................................................................1 選題背景，研究目的及意義 ....................................................................................1 國(guó)內(nèi)外研究現(xiàn)狀 ........................................................................................................1 大梁校正儀的發(fā)展歷史 ..................................................................................1 國(guó)內(nèi) 外研究狀況及結(jié)果 ..................................................................................2 研 究?jī)?nèi)容 及研究方法 ................................................................................................2 研究?jī)?nèi)容 ..........................................................................................................2 研究方法 ..........................................................................................................3 第 2 章 校正儀的整體結(jié)構(gòu)設(shè)計(jì) ...................................................................................4 簡(jiǎn)述框架式汽車大梁校正儀工作原理 ....................................................................4 舉升機(jī)構(gòu)主要結(jié)構(gòu)確定 ............................................................................................4 舉升機(jī)構(gòu)整體結(jié)構(gòu)形式及基本組成 ..............................................................4 舉升機(jī)構(gòu)各零部件安裝位置及潤(rùn)滑 ..............................................................5 舉升平臺(tái)及定位夾具主要結(jié)構(gòu)確定 ........................................................................5 舉升平臺(tái)整體結(jié)構(gòu)形式及基本組成 ..............................................................5 定位夾具整體結(jié)構(gòu)形式及基本組成 ..............................................................6 拉塔的主要結(jié)構(gòu)確定 ................................................................................................6 拉塔橫梁處整體結(jié)構(gòu)形式及基本組成 ..........................................................6 拉塔柱的結(jié)構(gòu)形式及基本組成 ......................................................................7 其它附件 ....................................................................................................................7 確定框架式大梁校正儀各結(jié)構(gòu)尺寸及材料 ............................................................7 建立待修汽車基本參數(shù)模型 ..........................................................................8 校正儀底部結(jié)構(gòu)部分主要尺寸及材料的確定 ..............................................8 校正儀中間結(jié)構(gòu)部分尺寸及材料的確定 ......................................................8 校正儀上部 平臺(tái)結(jié)構(gòu)尺寸及材料的確定 ......................................................9 定位夾具的尺寸及材料的確定 .................................................................... 11 拉塔組件的尺寸及材料的確定 ....................................................................12 方凳及斜坡板凳的尺寸確定 ........................................................................13 設(shè)備各部件質(zhì)量的估算及設(shè)計(jì)舉升質(zhì)量 ..............................................................13 估算拉塔組件的質(zhì)量 ....................................................................................14 估算平臺(tái)上設(shè)備的質(zhì)量 ................................................................................14 估算平臺(tái)中部的質(zhì)量 ....................................................................................14 估算底板處的質(zhì)量 ........................................................................................15 實(shí)際設(shè)計(jì)舉升質(zhì)量 ........................................................................................15 本章小結(jié) ..................................................................................................................15 第 3 章 校正儀的力學(xué)分析及校核 ............................................................................16 雙鉸接剪刀式舉升機(jī)構(gòu)的力學(xué)模型 ......................................................................16 舉升機(jī)構(gòu)力學(xué)模型建立與分析 ....................................................................16 舉升機(jī)構(gòu)主要關(guān)系參數(shù)的確定 ....................................................................17 液壓機(jī)構(gòu)力的分析與計(jì)算 ......................................................................................17 確定載荷與液壓缸推力的關(guān)系 ....................................................................17 計(jì)算液壓缸的推力 ........................................................................................18 舉升機(jī)構(gòu)的力學(xué)分析與計(jì)算 ..................................................................................19 舉升機(jī)最低狀態(tài)時(shí)，各臂受力情況 ............................................................19 舉升機(jī)舉升到最高位置時(shí)，各臂受力情況 ................................................20 定位夾具及拉塔的力學(xué)分析與計(jì)算 ......................................................................22 定位夾具的受力分析 ....................................................................................22 拉塔的受力分析 ............................................................................................22 主要零部件的強(qiáng)度校核 ..........................................................................................23 舉升臂 AOB 的強(qiáng)度校核 .............................................................................23 舉升臂 COD 的強(qiáng)度校核 .............................................................................25 液壓缸上端支承軸的強(qiáng)度校核 ....................................................................27 連接舉升臂銷軸的強(qiáng)度校核 ........................................................................27 平臺(tái)內(nèi)橫梁的強(qiáng)度校核 ................................................................................28 定位夾具的強(qiáng)度校核 ....................................................................................29 定位夾具支撐橫梁的強(qiáng)度校核 ....................................................................30 拉塔的強(qiáng)度校核 ............................................................................................31 拉塔處液壓缸支撐銷軸的強(qiáng)度校核 ............................................................32 本章小結(jié) ..................................................................................................................33 第 4 章 校正儀 液壓系統(tǒng)的選擇與計(jì)算 ...................................................................34 液壓系統(tǒng)的選擇 ......................................................................................................34