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目錄 摘要 I Abstract II 1 緒論 1 1 1 無鏈條自行車的設(shè)計(jì)意義 1 1 2 自行車設(shè)計(jì)的分類及其特點(diǎn) 1 1 3 國內(nèi)的研究狀況及發(fā)展趨勢(shì) 3 1 4 研究的主要內(nèi)容 4 2 方案的選擇與論證 5 2 1 設(shè)計(jì)要求 5 2 2 曲柄搖桿驅(qū)動(dòng)部分的分析與選擇 5 2 3 無鏈條自行車的結(jié)構(gòu)設(shè)計(jì) 5 2 4 設(shè)計(jì)特點(diǎn) 6 3 無鏈條自行車傳動(dòng)裝置的設(shè)計(jì) 7 3 1 傳動(dòng)機(jī)構(gòu)尺寸分析 7 3 2 摩擦力分析 11 4 傳動(dòng)裝置的校核分析 13 4 1 搖桿校核 db 段 13 4 2 連桿校核 bc 段 17 4 3 曲柄盤上的銷釘?shù)男：?18 5 附件機(jī)構(gòu)選用與分析 19 5 1 折疊機(jī)構(gòu)的分析 19 5 2 前輪制動(dòng)機(jī)構(gòu)分析 20 5 2 后輪制動(dòng)系統(tǒng)分析 21 6 總結(jié) 22 參考文獻(xiàn) 23 致 謝 24 I 無鏈條自行車的設(shè)計(jì) 摘要 本文將介紹無鏈條自行車的設(shè)計(jì) 目前 市面上流行的自行車基本都為鏈條式自行車 人力腳蹬 搭配鏈傳動(dòng) 帶動(dòng)自行車后輪轉(zhuǎn)動(dòng) 從而完成自行車的正常運(yùn)轉(zhuǎn) 雖然鏈傳動(dòng)自行車是目前最簡(jiǎn)單 最優(yōu)化的產(chǎn)品 但是不可避免的 鏈傳動(dòng)自行車仍然有很多缺點(diǎn) 比如 當(dāng)鏈傳動(dòng)部件老化之后容易 引起鏈條脫落現(xiàn)象 并且鏈傳動(dòng)的瞬時(shí)傳動(dòng)比是變化的 工作時(shí)有噪聲 而且需要頻繁的潤(rùn)滑和張緊 措施 鑒于此 設(shè)計(jì)了無鏈條自行車 根據(jù)能起到健身和安裝更簡(jiǎn)單的要求 完成了總體方案的設(shè)計(jì) 采用曲柄搖桿機(jī)構(gòu)來代替原有的鏈傳動(dòng)機(jī)構(gòu) 并采用兩套曲柄搖桿機(jī)構(gòu)順利解決轉(zhuǎn)動(dòng)過程中出現(xiàn)的死 點(diǎn)問題 曲柄搖桿自行車的設(shè)計(jì)具有安裝簡(jiǎn)便 安全可靠 造價(jià)低 傳動(dòng)比精確等優(yōu)點(diǎn) 關(guān)鍵詞 自行車 無鏈條 曲柄搖桿機(jī)構(gòu) 2 Design of Bicycle Without Chain Abstract This paper introduces the design of bicycle without chain At present currently popular bicycle is chain transmission bike Through using pedal bike turning to lead the rear wheels Although even transmission bicycle is one of the most simple high speed operation optimization of products but inevitable chain bike still has many faults for example chain in the form of bicycle in high speed running time easy to cause the chain falls off phenomenon and recommends the instantaneous velocity ratio is change and it job with noise and need lubrication and a tight measures In view of this design an bike without chain According to can play the fitness and more simple installation requirements completed the overall scheme design Using the crank rocker organization instead of the original chain transmission mechanism and the two sets of crank rocker organization solved successfully turn appeared in the process of dead spots The design of the crank rocker bicycle convenient installation safe and reliable low cost transmission ratio accurate etc Keywords bicycle no chain crank rocker organization