喜歡就充值下載吧。。資源目錄里展示的文件全都有，，請(qǐng)放心下載，，有疑問(wèn)咨詢QQ:414951605或者1304139763 ======================== 喜歡就充值下載吧。。資源目錄里展示的文件全都有，，請(qǐng)放心下載，，有疑問(wèn)咨詢QQ:414951605或者1304139763 ======================== 摘 要 本文在第一代排球扣、發(fā)球裝置機(jī)器的基礎(chǔ)上，對(duì)發(fā)球器改進(jìn)設(shè)計(jì)并在提高排球的出球速度上進(jìn)行分析。 首先對(duì)國(guó)內(nèi)外排球發(fā)球機(jī)的現(xiàn)狀進(jìn)行了簡(jiǎn)單的分析和研究，在此基礎(chǔ)上明確發(fā)球器的發(fā)球原理。接著以摩擦輪式發(fā)球器為例，針對(duì)提高其出球速度、旋轉(zhuǎn)方面的特性，提出了用帶傳動(dòng)式機(jī)構(gòu)來(lái)替代摩擦輪式裝置，使得排球在發(fā)出球前受力時(shí)間加長(zhǎng)，運(yùn)動(dòng)更加平穩(wěn)。最后對(duì)帶傳動(dòng)結(jié)構(gòu)進(jìn)行力學(xué)分析，重點(diǎn)是排球發(fā)球的過(guò)程，即進(jìn)入傳送帶到出球這個(gè)過(guò)程的運(yùn)動(dòng)速度和受力分析。 本文最后總結(jié)了帶傳動(dòng)發(fā)球器和原有的摩擦輪發(fā)球器的差異，對(duì)進(jìn)一步完善發(fā)球器裝置提出了改進(jìn)方案。 關(guān)鍵詞：發(fā)球裝置 帶傳動(dòng) 出球速度 摩擦輪 力學(xué)分析 Abstract On the basis of the first generation of smashing tee device machine serve is to improve the design and analysis improve volleyball ball speed. First, a simple analysis and research on the current situation of the domestic and international volleyball ball machine, based on a clear principle of serve serve. Followed by a friction wheel tee, for example, targeted to improve the speed of the ball, the rotation characteristics, the belt drive mechanism to replace the friction wheel device, making volleyball in force issued before the ball longer, exercise more stable. Finally, the mechanical structure of the belt drive, the focus is to the volleyball serve the process, that is, into the conveyor belt to the speed and force analysis of the movement of the ball this process. Finally, summed up the difference with the Transmission tee and the original friction wheel serve to further perfect tee device improvement program. Keywords: Serve device；Belt drive；The ball speed；Friction wheel；Mechanical analysis 目 錄 摘要 .............................. .... .... .............................................................................................. ...................I Abstract ......................................................... ........................................................................................... II 目錄 .............................. .... .... .............................................................................................. ...................III 第一章.概述 1 1.1 本課題的來(lái)源與現(xiàn)實(shí)意義 1 1.2 國(guó)內(nèi)外排球發(fā)球器的現(xiàn)狀 2 1.3 本文主要研究?jī)?nèi)容 5 第二章.排球發(fā)球中球的旋轉(zhuǎn)和速度分析 6 2.1 排球發(fā)球中旋轉(zhuǎn)球的幾種現(xiàn)象 6 2.2 排球發(fā)球器工作原理 9 2.3 發(fā)球擋板工作原理 10 第三章.自動(dòng)排球發(fā)球機(jī)的設(shè)計(jì) 14 3.1一代發(fā)球機(jī)的速度分析 14 3.2帶傳動(dòng)分析 15 3.3兩個(gè)主動(dòng)摩擦輪的轉(zhuǎn)速相同時(shí)排球的速度分析 21 3.4兩個(gè)主動(dòng)摩擦輪的轉(zhuǎn)速不同時(shí)排球的速度分析 26 3.5兩帶傳動(dòng)傳動(dòng)比不為1的時(shí)候排球的速度分析 28 3.6為發(fā)球器選擇帶型號(hào)及參數(shù) 29 3.7設(shè)計(jì)帶發(fā)球器裝置的參數(shù)，計(jì)算排球的速度 30 3.8小結(jié) 31 第四章.總結(jié) 32 參考文獻(xiàn) 33 III III