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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)外機械無級變速器的研究現(xiàn)狀……………………………………… 1
1.3 畢業(yè)設(shè)計的內(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 主要零件的計算與設(shè)計……………………………………………… 6
3.1 輸入、輸出軸的計算與設(shè)計……………………………………………… 6
3.2 輸入、輸出軸上軸承的計算與設(shè)計……………………………………… 7
3.3 輸入、輸出軸上端蓋的計算與設(shè)計……………………………………… 8
3.4 加壓盤的計算與設(shè)計……………………………………………………… 8
3.5 調(diào)速齒輪上變速曲線槽的計算與設(shè)計…………………………………… 9
3.6 鋼球與主、從動錐輪的計算與設(shè)計……………………………………… 10
3.7 調(diào)速機構(gòu)的計算與設(shè)計…………………………………………………… 11
3.8 無極變速器的裝配………………………………………………………… 12
4 主要零件的校核……………………………………………………… 14
4.1 傳動部件的受力分析與強度計算………………………………………… 14
4.2 軸承的校核………………………………………………………………… 16
4.3 軸的校核…………………………………………………………………… 17
4.4 傳動鋼球的轉(zhuǎn)速校核……………………………………………………… 19
4.5 鍵的校核…………………………………………………………………… 19
參考文獻…………………………………………………………………… 22
附錄………………………………………………………………………… 23
鋼球式無級變速器結(jié)構(gòu)設(shè)計
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)計計算、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)計的理論基礎(chǔ)。本設(shè)計采用的是以鋼球作為中間傳動元件，通過改變鋼球主動側(cè)和從動側(cè)的工作半徑來實現(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、主動錐輪、從動錐輪和內(nèi)環(huán)所組成。動力由輸入軸輸入，帶動主動錐輪同速轉(zhuǎn)動，經(jīng)鋼球利用摩擦力驅(qū)動內(nèi)環(huán)和從動錐輪，再經(jīng)從動錐輪，Ｖ形槽自動加壓裝置驅(qū)動輸出軸將動力輸出，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)計為恒功率輸出特性，輸出轉(zhuǎn)速恒低于輸入轉(zhuǎn)速，運用于低轉(zhuǎn)速大轉(zhuǎn)矩傳動。本文分析了在傳動過程中主、從動輪，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、主動追率、從動錐輪、渦輪盤等進行了計算與設(shè)計。并對調(diào)速結(jié)構(gòu)進行合理設(shè)計。本文根據(jù)傳動錐輪的工作應(yīng)力和材料疲勞強度 ,建立起錐面?zhèn)鲃庸β?、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
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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