钢环分离锥式无级变速器设计

目录

第一章绪论 (1)

1.1无级变速器的介绍 (1)

1.2摩擦式无级变速器 (1)

1.3摩擦式无级变速器运动原理 (1)

1.4钢环分离锥式无级变速器的优点 (3)

1.5本次课题设计任务 (3)

第二章钢环分离锥式无级变速器设计方案 (4)

2.1钢环分离锥式无级变速器简图 (4)

2.2传动零件尺寸 (4)

2.3钢环分离锥式无级变速器受力分析 (5)

2.4强度验算 (7)

2.4.1恒功率传动情况时 (8)

2.4.2恒扭矩传动情况时 (10)

2.4.3钢环强度效验计算 (11)

第三章钢环分离锥式无级变速器的计算 (13)

3.1计算锥轮的尺寸和参数 (13)

3.2钢环的设计 (14)

3.3轴系零件设计 (14)

3.4调速操纵机构设计 (16)

3.4.1确定齿轮的参数 (16)

3.4.2确定齿条的参数 (17)

3.4.3计算螺杆 (16)

3.5设计箱体 (18)

第四章强度校核 (19)

4.1刚换强度验算 (19)

4.2校验轴的强度 (20)

设计总结 (22)

致谢 (23)

参考文献 (24)

附录：英文文献翻译及原文 (25)

摘要

钢环分离锥锥轮无级变速器是机械摩擦式的一种变速器，它以钢环为中间原件，以改变主、从动锥轮的工作半径来实现无级变速。它能实现对称变速而且无需再设加压装，结构简单，时常将这种变速器应用在传动系统的高速级。首先查找变速器相关资料，了解其传动原理及设计要求和计算公式，选择材料。通过已知给定参数先求出变速器主要零件钢环和主从锥轮的相关尺寸，再根据已算出的数据和配合关系选定其主要配合原件轴承型号，然后确定锥轮各段长度和大小。再进行轴的设计，通过公式选取轴的最少直径，再结合与锥轮配合关系确定轴的各段长度及选取键和轴键等相关尺寸，根据设计手册选取有关尺寸的配合公差，选取设计调速操作机构，再由已知的零件尺寸和配合关系，根据设计手册确定箱体和端盖的基本尺寸，其后对轴和钢环进行强度校核，以确定尺寸是否满足要求。最后由算出的数据用CAD进行绘图。

关键词：钢环，锥轮，无级变速，齿轮，轴

Abstract

The steel loop separation cone pulley variator is the mechanical friction type variator's one form. It takes the middle part by the steel loop, the affiliation changes the host, the driven cone pulley's working radius to realize the stepless change, rotates the handwheel, through the gear, the rack and the tension bar causes the transportable awl crop rotation end motion, changes the host, the driven cone pulley and the steel loop working radius, thus realizes the speed change. Moreover, its structure is simple, the manufacture is convenient. It mainly uses in the metal-cutting machine tool, the textile machinery and so on high speed machine. First, find related information transmission, to understand the driving principle and design requirements and the formula, select materials. Parameters given by the first known transmission main parts obtained from the cone round steel ring and the main relevant dimensions have been calculated according to the cooperation with selected data and the main bearings with the original model, and then determine the cone length and size of each round . Further design of the shaft, at least by the formula select the diameter of the shaft, combined with the relationship established with the cone wheel shaft length and the selection of the key and the shaft key and other related dimensions, Selected according to the design manual with the tolerances on dimensions, select the design speed operating mechanism, and then from the known size and with the relationship between parts, According to the design manual to determine the basic size of box and cover, then the strength of the shaft and the steel ring checked to determine whether the size to meet the requirements. Finally, the calculated data with CAD for drawing.

Key words: Steel loop, cone pulley, limitless speed change, gear, axi