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目 錄
摘要
Abstract
1 緒論…………………………………………………………………… 1
1.1 研究的意義及背景………………………………………………………… 1
1.2 國內(nèi)外機(jī)械無級變速器的研究現(xiàn)狀……………………………………… 1
1.3 畢業(yè)設(shè)計(jì)的內(nèi)容和要求…………………………………………………… 2
2 總體類型的比較與選擇……………………………………………… 3
2.1 鋼球外錐無級變速器……………………………………………………… 3
2.2 鋼球長錐式無級變速器…………………………………………………… 5
2.3 兩類型的比較與選擇……………………………………………………… 5
3 主要零件的計(jì)算與設(shè)計(jì)……………………………………………… 6
3.1 輸入、輸出軸的計(jì)算與設(shè)計(jì)……………………………………………… 6
3.2 輸入、輸出軸上軸承的計(jì)算與設(shè)計(jì)……………………………………… 7
3.3 輸入、輸出軸上端蓋的計(jì)算與設(shè)計(jì)……………………………………… 8
3.4 加壓盤的計(jì)算與設(shè)計(jì)……………………………………………………… 8
3.5 調(diào)速齒輪上變速曲線槽的計(jì)算與設(shè)計(jì)…………………………………… 9
3.6 鋼球與主、從動(dòng)錐輪的計(jì)算與設(shè)計(jì)……………………………………… 10
3.7 調(diào)速機(jī)構(gòu)的計(jì)算與設(shè)計(jì)…………………………………………………… 11
3.8 無極變速器的裝配………………………………………………………… 12
4 主要零件的校核……………………………………………………… 14
4.1 傳動(dòng)部件的受力分析與強(qiáng)度計(jì)算………………………………………… 14
4.2 軸承的校核………………………………………………………………… 16
4.3 軸的校核…………………………………………………………………… 17
4.4 傳動(dòng)鋼球的轉(zhuǎn)速校核……………………………………………………… 19
4.5 鍵的校核…………………………………………………………………… 19
參考文獻(xiàn)…………………………………………………………………… 22
附錄………………………………………………………………………… 23
鋼球式無級變速器結(jié)構(gòu)設(shè)計(jì)
摘要：本文簡要介紹了摩擦式鋼球無極變速器的基本結(jié)構(gòu)、設(shè)計(jì)計(jì)算、材質(zhì)及潤滑等方面的知識，并以此作為本次無級變速器設(shè)計(jì)的理論基礎(chǔ)。本設(shè)計(jì)采用的是以鋼球作為中間傳動(dòng)元件，通過改變鋼球主動(dòng)側(cè)和從動(dòng)側(cè)的工作半徑來實(shí)現(xiàn)輸出軸轉(zhuǎn)速連續(xù)變化的鋼球錐輪式無級變速器。由鋼球、主動(dòng)錐輪、從動(dòng)錐輪和內(nèi)環(huán)所組成。動(dòng)力由輸入軸輸入，帶動(dòng)主動(dòng)錐輪同速轉(zhuǎn)動(dòng)，經(jīng)鋼球利用摩擦力驅(qū)動(dòng)內(nèi)環(huán)和從動(dòng)錐輪，再經(jīng)從動(dòng)錐輪，Ｖ形槽自動(dòng)加壓裝置驅(qū)動(dòng)輸出軸將動(dòng)力輸出，調(diào)整鋼球軸心的傾斜角β就可達(dá)到變速的目的。本設(shè)計(jì)為恒功率輸出特性，輸出轉(zhuǎn)速恒低于輸入轉(zhuǎn)速，運(yùn)用于低轉(zhuǎn)速大轉(zhuǎn)矩傳動(dòng)。本文分析了在傳動(dòng)過程中主、從動(dòng)輪，鋼球和外環(huán)的工作原理和受力關(guān)系；通過受力關(guān)系分析，并針對具體參數(shù)對輸入軸、輸出軸、端蓋、加壓盤、主動(dòng)追率、從動(dòng)錐輪、渦輪盤等進(jìn)行了計(jì)算與設(shè)計(jì)。并對調(diào)速結(jié)構(gòu)進(jìn)行合理設(shè)計(jì)。本文根據(jù)傳動(dòng)錐輪的工作應(yīng)力和材料疲勞強(qiáng)度 ,建立起錐面?zhèn)鲃?dòng)功率、錐輪直徑與材料疲勞壽命及可靠度等因素之間的關(guān)系，合理設(shè)計(jì)錐輪的結(jié)構(gòu)尺寸。
關(guān)鍵詞：無級變速器、摩擦式、鋼球錐輪式、設(shè)計(jì)
Design of ball-type CVT
Abstract: This paper briefly describes the basic structure, design calculations, materials and lubrication knowledge of friction ball CVT, and theoretically bases on this as a continuously variable transmission design. This design adopts the method of steel ball as an intermediate drive component, and changing the working radius of the active side and driven side to achieve the continuous variation of the output shaft speed cone wheel CVT ball, which composes steel ball, active cone wheel, driven wheels and the inner cone. Input shaft inputs power to drive the same speed active cone wheel rotation, and through the ball friction to drive the inner cone and wheel drive, and then through the driven wheel cone, V-shaped groove automatic compression devices of drive the output shaft will output power, and adjusting the ball axis tilt angle β can achieve the purpose of changing speed. The design is for the constant power output characteristics, and output rotating speed is lower than input rotating speed constantly, used in low speed for high torque drive. This paper analyzes the working principle and force relations of the main, driven wheel, steel ball and outer ring in the transmission process. Through force relationship analysis, we calculate and design on the input shaft, output shaft, cover, pressure plate, active recovery rate, the driven bevel wheel, turbine disc, etc on account of specific parameters, and reasonably design the speed controlling structure, the drive cone wheel stress and material fatigue strength, This essay establishes a drive power cone rate, cone wheel diameter, material fatigue life and relationship between reliability factors, and rationally design the size of cone wheel, according to work force and material fatigue life of the drive cone wheel.
Keywords: continuously variable transmission, friction, steel ball cone wheel, design
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