【正文】
一種升降平臺(tái)。 on the platform。 scissors。為保證倉儲(chǔ)區(qū)域管理人員的人身安全和提高升降物品的安全性,采用無人化作業(yè)方式, 安全裝置及各種電器保護(hù)裝置齊全、可靠,便于操作和維修 。該升降平臺(tái)作業(yè)區(qū)域?qū)儆谝兹?、易爆等場所? 本次設(shè)計(jì)主要進(jìn)行了 升降平臺(tái)功能特點(diǎn)分析求解,升降平臺(tái) 總體布局方案和主要性能參數(shù)確定,各機(jī)構(gòu)和各部件的結(jié)構(gòu)方案設(shè)計(jì),主要控制方案設(shè)計(jì),上、下臺(tái)架機(jī)構(gòu)、剪叉機(jī)構(gòu)設(shè)計(jì)計(jì)算, 整機(jī)穩(wěn)定性、可靠性驗(yàn)算 。它目前廣泛地應(yīng)用在各行各業(yè),是一種貨物裝卸流通領(lǐng)域中較為理想合理的升降平臺(tái)。. . 本科畢業(yè)設(shè)計(jì)說明書 題 目 : 2t剪叉式 升降平臺(tái)設(shè)計(jì) 院 (部) :機(jī)電工程學(xué)院 專 業(yè) :機(jī)械工程及自動(dòng)化 班 級 : 機(jī) 職 042 班 姓 名 : 程菲菲 學(xué) 號 : 2021075371 指導(dǎo)教師 : 王曉偉 完成日期 : 2021 年 6 月 22 日 . . 目 錄 摘 要 ................................................. III ABSTRACT ................................................ IV 1 前 言 .............................................. 1 剪叉式液壓升降平臺(tái)概述 ............................................................................................. 1 剪叉式液壓升降平臺(tái)發(fā)展?fàn)顩r .............................................................................. 1 升降平臺(tái)分類及各自優(yōu)缺點(diǎn) .................................................................................. 1 升降平臺(tái)的選用 ...................................................................................................... 3 課題任務(wù) ......................................................................................................................... 4 課題背景和研究意義 .............................................................................................. 4 本課題主要研究的內(nèi)容 .......................................................................................... 4 課題關(guān)鍵問題及難點(diǎn) : .......................................................................................... 4 2 設(shè)計(jì)方案的確定 ...................................... 6 剪叉式液壓升降平臺(tái)功能特點(diǎn)分析求解 ..................................................................... 6 確定設(shè)計(jì)方案的原則 ..................................................................................................... 6 設(shè)計(jì)方案的確定 .............................................................................................................. 6 總體設(shè)計(jì)方案的確定 ............................................................................................... 6 主要技術(shù)參數(shù)的確定 .............................................................................................. 8 各機(jī)構(gòu)和各部件的結(jié)構(gòu)方案設(shè)計(jì) ........................................................................... 9 主要控制方案設(shè)計(jì) ................................................................................................ 10 3 上平臺(tái)及各剪叉的設(shè)計(jì)計(jì)算 ........................... 12 升降平臺(tái)的參數(shù) .......................................................................................................... 12 重物集中作用于升降平臺(tái)中央位置時(shí)的受力分析 .................................................... 12 升降平臺(tái)處于最低位置時(shí)的力學(xué)模型及受力分析 ............................................. 12 升降平臺(tái)處于最高位置時(shí)的力學(xué)模型及受力分析 .............................................. 17 重物偏載于升降平臺(tái)鉸接處(即 D端)時(shí)的受力分析 ............................................ 22 升降平臺(tái)處于最低位置時(shí)的力學(xué)模型及受力分析 ............................................. 22 升降平臺(tái)處于最高位置時(shí)的力學(xué)模型及受力分析 ............................................. 27 . . 重物偏載于升降平臺(tái)滾輪 處(即 C端)時(shí)的受力分析 ............................................ 33 升降平臺(tái)處于最低位置時(shí)的力學(xué)模型及受力分析 ............................................. 33 升降平臺(tái)處于最高位置時(shí)的力學(xué)模型及受力分析 ............................................. 38 剪叉的校核 .................................................................................................................... 43 剪叉 BD 的強(qiáng)度校核 ............................................................................................... 43 剪叉 AC 的強(qiáng)度校核 ............................................................................................... 43 總 結(jié) ............................................... 44 謝 辭 ............................................... 45 參考文獻(xiàn) ............................................ 46 . . 摘 要 剪叉式升降平臺(tái)作為一種平面升降機(jī)械,主要用于抬升重物,在很多領(lǐng)域都有著 廣泛的用途,如用作貨場裝卸貨物的升降臺(tái)、各種工程中操作人員的工作平臺(tái)等等。 剪叉式液壓升降平臺(tái)是一種結(jié)構(gòu)比較簡單、 舉升力大、升降平穩(wěn)、噪音低、操作方便、維修簡便,并可以停留在升降范圍內(nèi)的任意位置上的一種廣泛應(yīng)用的升降平臺(tái)。 液壓系統(tǒng)是剪叉式 液壓 升降平臺(tái)的驅(qū)動(dòng)和控制部分,通過液壓缸驅(qū)動(dòng)剪叉 改 變幅 度 ,完成升降任務(wù) , 通過 平衡閥、調(diào)速閥和溢流閥 的控制作用,完成調(diào)速、保壓、制動(dòng)、 平衡 的功能。 該課題屬于橫向課題。要求安全、可靠,自動(dòng)化程度高。 關(guān)鍵詞 : 液壓升降平臺(tái); 剪叉 ;液壓缸; 上平臺(tái);底座 . . ABSTRACT Scissorsstyle takeoff and landing platform as a plane movements machinery, mainly used for lifting heavy objects, in many fields have a wide range of uses, such as loading and unloading cargo freight yard for the lifting platform, operating in various projects of the work platform, and so on. Scissors hydraulic lifting platform is a relatively simple structure, the lifting force, a smooth takeoff and landing, low noise, easy to operate, maintenance is simple, and can remain in the takeoff and landing anywhere within the scope of a wider application of the takeoff and landing platform. It is currently widely used in various trades and industries, is a cargo flow in the area more desirable and reasonable takeoff and landing platform. Hydraulic system is the scissorstype hydraulic lifting platform for the drive and control of the hydraulic cylinders driven by changes in the rate scissors, plete lifting tasks, through balance valve, relief valve and the governor valve control, the governor pleted , Packing, braking and balance function. The design for the main features of the takeoff and landing platform for analysis, the takeoff and landing platform for the general layout programmes and identify key performance parameters, agencies and parts of the structure of the programme design, the main control programme design, onstep down, scissors mechanism design and calculation With two stability, reliability checking. The topic of crosscutting issues. The takeoff and landing platform for regional operations are flammable, explosive, and other places. Require safe, reliable, high degre