机械分离锥式无级变速器结构设计

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毕业设计说明书

题目：机械分离锥式无级变速器结构设计

专业：机械设计制造及其自动化

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完成日期： 20 年5月

目录

摘要.................................................................................. I Abstract ..............................................................................II 第一章绪论 (1)

1.1 机械无级变速器的发展概况 (1)

1.2 机械无级变速器的特征和应用 (1)

1.3 无级变速研究现状 (2)

1.4 机械分离锥式无级变速器的优点 (3)

1.5 本次设计的内容和要求 (4)

第二章机械分离锥式无级变速器总体方案及原理 (4)

2.1 机械分离锥式无级变速器简图 (4)

2.2 机械分离锥式无级变速传动原理 (5)

第三章机械分离锥式无级变速器总体设计计算 (5)

3.1变速器运动学计算 (5)

3.2 变速箱内传动零件的尺寸 (7)

3.3 钢环无级变速器受力分析 (8)

3.4 零件之间初始间隙或过盈 (9)

3.5 强度验算 (10)

3.5.1 恒功率传动情况时 (11)

3.5.2 变速箱恒扭矩传动情况时 (13)

3.5.3 钢环强度校验计算 (14)

第四章机械分离锥式无级变速器各零件的计算 (15)

4.1 计算锥轮的尺寸和参数 (15)

4.2 钢环设计 (18)

4.3 轴系零件设计 (19)

4.4 调速操纵机构设计 (21)

4.4.1 确定齿轮的参数 (21)

4.4.2 确定齿条的参数 (22)

4.4.3 计算螺杆 (22)

4.5 变速箱箱体设计 (23)

第五章变速器内主要零件的强度校核 (24)

5.1 钢环强度验算 (24)

5.2校核轴的强度 (24)

第六章设计总结 (27)

参考文献 (28)

附录英文翻译 (29)

附录原文 (36)

机械分离锥轮无级变速器

摘要：机械分离锥式无极变速器是一种结构简单、装配方便等一系列优点的机械摩擦式无级变速器。此外，在工作过程钢环有自紧作用，无需加压装置。

本次设计主要要考虑到机械分离锥式无级变速器的实用行、经济性和小重量轻的要求，目前在机械传动装置中，能减小装置的外廓尺寸和重量，达到体积小重量轻以及实现高的传动比所采用的最主要的传动形式就是钢环传动。并且在设计中要考虑到变速箱箱各个零部件的等强度等寿命的设计原则，在保证强度和寿命的条件下要对传动齿轮箱进行传动比优化分配和参数优化设计。

通过查找变速器相关资料，了解其机械分离锥式无级变速器基本传动原理。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。然后进行主、从动轴的设计和校核。根据轴的大小和轴与锥轮的配合关系确定键的相关尺寸，通过查阅手册确定各尺寸的配合公差。根据调速范围设计调速操作机构，然后由以上各零件的受力关系和装配要求设计箱体和轴承端盖的基本尺寸。然后通过强度校核以确定各零件是否满足强度要求。根据设计各零件的尺寸用AutoCAD画出装配图，根据装配图画出主要传动元件的零件图。最后完成设计说明书。

关键词：无级变速器，齿轮箱，钢环，锥轮，调速，轴承

Mechanical separating cone wheel variator

Abstract: Mechanical separation cone type non-polar transmission is a kind of simple structure, convenient wait for a series of advantages to assemble mechanical friction type variator.Inaddition, the working process of the steel ring in a self-tightening role, without pressure device.

This design main should consider mechanical separating cone type variator practical line, economy and small light weight requirement, is currently in the mecha-

nical transmission device, which can reduce device size and weight, the profile to small volume light weight and achieve high ratio using the main transmission form is steel ring transmission. And in the design considerations to the gearbox box of each parts such as the design principles of strength of life, while ensuring the strength and fatigue under the condition of transmission gearbox to optimal distribution and para-

meters for transmission is optimized.

Through the search transmission relevant data, understand its mechanical separating cone type variator basic transmission principle. First known parameter is given out the transmission main parts steel ring and master-slave cone rounds of relevant sizes, and then based on the data already calculate and coordinate relationship with selected its main original bearing type, then determine the length and size cone wheel paragraphs. Then the Lord and driven shafts design and check. According to the size and axes and shaft with relationship of cone round to determine the relative size, through the key of various sizes determined accessible handbook with tolerance. According to the speed range speed operators, and then design by the stress of the above all parts assembly design requirement for cabinet relationship and the basic sizes and bearing housing. Then through strength check to determine whether meet the required strength all parts. The size of each parts according to the design with AutoCAD draw pictures out, according to the assembly drawings main transmission component parts graph. Finally completed the design specification.

Key words: CVT Contiuously Variable Transmission，gear box，Steel Ring，conepulley，speedgoverning，Bearing