设计简介
摘要：随着国民经济的持续发展，机械工业也在不断地发展着，各种设备都在不断地发展，创新着。特别是在农业方面，变速器的应用非常广泛，在一些特定的工作场合，变速器体积小，变速灵活，价格成本低廉很受欢迎，根据市场调查发现，变速器必须满足当今人们对汽车速度调节方面的灵活性操控等需求，能够在不改变发动机的扭矩和转速的情况下，改变变速器的驱动力和行驶速度；在发动机曲轴旋转方向不变的情况下，使变速器前进或后退；在发动机不熄灭的情况下，可使变速器长时间停车或进行固定作业。
目前市面上的变速器大多都是采用传统的变速结构，在某些特定的区域，这种结构形式的变速器非常不受欢迎。由于以往的变速器采用传统的结构形式，这样就造成传动精度不好控制，保养维护费用较高;同时存在一定的安全隐患。因此，对整机的安全性要求较高，操作时也会给工作人员带来强烈的震动,使得操作很不舒服。虽然传统的变速器传动效率较高，变速效果较好，但是价格也较昂贵，对于一般的用户难以接受。所以研究一种新式的离心式皮带轮无极变速器势在必行！
变速器作为机动车辆中核心部件的一种，它工作时，发动机通过发动机分轮从而带动离心式皮带轮无极变速器转动，从而间接地带动了车轮的转动，这样车辆就可以行驶了。
本文介绍了离心式皮带轮无极变速器的结构组成、工作原理以及主要零部件的设计中所必须的理论计算和相关强度校验，以及对其结构进行创新设计，该变速器的优点是传动链短、效率高、易加工、使用和维护都很方便，较适合在恶劣的环境下工作，最主要的是其传动效率很高。
关键词： 离心式皮带轮无极变速器；扭矩；结构；校验
1. 课题的来源及研究的目的和意义 1
2. 本课题研究的主要内容 5
2.1 金属带式无极变速器的发展概况 5
3. 离心式皮带轮无极变速器的总体方案设计 7
3.1 变速器的结构形式 9
3.1.1 变速器内部传动系统的布局 10
3.2 变速方式 10
3.3 基本运动关系 10
4. 离心式皮带轮的无极变速器传动系统的设计 11
4.1 变速器内部传动系统的具体结构 12
4.2 飞轮的类型 15
4.2.1 转动惯量对系统的影响 17
4.2.2 弹簧刚度对系统性能的影响 18
4.3轴的设计校核与轴承选用 19
4.3.1 轴的设计及强度效核 22
4.4 单向离合器的工作原理及计算 23
5. 变速器内部主要传动零件的强度校核 24
5.1 传动轴的强度校核 25
5.2 传动齿轮的强度校核 26
5.3 轴承强度的校核 26
6. 结论 27
参考文献 28
致谢 29
目前市面上的变速器大多都是采用传统的变速结构，在某些特定的区域，这种结构形式的变速器非常不受欢迎。由于以往的变速器采用传统的结构形式，这样就造成传动精度不好控制，保养维护费用较高;同时存在一定的安全隐患。因此，对整机的安全性要求较高，操作时也会给工作人员带来强烈的震动,使得操作很不舒服。虽然传统的变速器传动效率较高，变速效果较好，但是价格也较昂贵，对于一般的用户难以接受。所以研究一种新式的离心式皮带轮无极变速器势在必行！
变速器作为机动车辆中核心部件的一种，它工作时，发动机通过发动机分轮从而带动离心式皮带轮无极变速器转动，从而间接地带动了车轮的转动，这样车辆就可以行驶了。
本文介绍了离心式皮带轮无极变速器的结构组成、工作原理以及主要零部件的设计中所必须的理论计算和相关强度校验，以及对其结构进行创新设计，该变速器的优点是传动链短、效率高、易加工、使用和维护都很方便，较适合在恶劣的环境下工作，最主要的是其传动效率很高。
关键词： 离心式皮带轮无极变速器；扭矩；结构；校验
Abstract：With the development of national economy, machinery industry is also in constant development, all kinds of equipment are in constant development and innovation. Especially in agriculture, application of transmission is very extensive, in some specific occasions, gear box has the advantages of small volume, flexible speed, low cost is very popular, according to market research found that the transmission must satisfy the people to the automobile speed adjusting flexibility of the manipulation of the requirements, can not change the engine the torque and speed change gear box case, the driving force and speed in the same direction of rotation of the engine crankshaft; under the condition of the gearbox forward or backward; when the engine is not out of the case, can make the transmission to stop for a long time or fixed operation.
Currently on the market most of the gearbox is used in traditional variable structure, in some specific area, the transmission of this kind of structure is not very popular. Since the transmission past the traditional forms of structure, thus causing the transmission accuracy control is not good, the maintenance cost is high; at the same time, there are some security risks. Therefore, the security requirements of the higher, the operation will give the staff to bring a strong shock, so that the operation is very uncomfortable. Although the transmission through the transmission efficiency is high, the transmission effect is good, but the price is more expensive, for the average user to accept. So the research of a new type planetary power
Transmission as a core component in a motor vehicle, when it is working, the engine through the V belt drives the gear box to rotate, thereby indirectly driven by the rotation of the wheels, so that the vehicle.
This paper introduces the theoretical calculation, structure design must be the planetary power shift gearbox working principle and main parts of the strength check and correlation, and the innovative design of the structure, the advantages of the gearbox is a short drive chain, high efficiency, easy to manufacture, use and maintenance are very convenient, more suitable for work in the bad environment, the most important is its high transmission efficiency
Key words：planetary gear type power shift gear box;Crankshaft;Processing craft;Fixture;
目 录
绪论 1Currently on the market most of the gearbox is used in traditional variable structure, in some specific area, the transmission of this kind of structure is not very popular. Since the transmission past the traditional forms of structure, thus causing the transmission accuracy control is not good, the maintenance cost is high; at the same time, there are some security risks. Therefore, the security requirements of the higher, the operation will give the staff to bring a strong shock, so that the operation is very uncomfortable. Although the transmission through the transmission efficiency is high, the transmission effect is good, but the price is more expensive, for the average user to accept. So the research of a new type planetary power
Transmission as a core component in a motor vehicle, when it is working, the engine through the V belt drives the gear box to rotate, thereby indirectly driven by the rotation of the wheels, so that the vehicle.
This paper introduces the theoretical calculation, structure design must be the planetary power shift gearbox working principle and main parts of the strength check and correlation, and the innovative design of the structure, the advantages of the gearbox is a short drive chain, high efficiency, easy to manufacture, use and maintenance are very convenient, more suitable for work in the bad environment, the most important is its high transmission efficiency
Key words：planetary gear type power shift gear box;Crankshaft;Processing craft;Fixture;
目 录
1. 课题的来源及研究的目的和意义 1
2. 本课题研究的主要内容 5
2.1 金属带式无极变速器的发展概况 5
3. 离心式皮带轮无极变速器的总体方案设计 7
3.1 变速器的结构形式 9
3.1.1 变速器内部传动系统的布局 10
3.2 变速方式 10
3.3 基本运动关系 10
4. 离心式皮带轮的无极变速器传动系统的设计 11
4.1 变速器内部传动系统的具体结构 12
4.2 飞轮的类型 15
4.2.1 转动惯量对系统的影响 17
4.2.2 弹簧刚度对系统性能的影响 18
4.3轴的设计校核与轴承选用 19
4.3.1 轴的设计及强度效核 22
4.4 单向离合器的工作原理及计算 23
5. 变速器内部主要传动零件的强度校核 24
5.1 传动轴的强度校核 25
5.2 传动齿轮的强度校核 26
5.3 轴承强度的校核 26
6. 结论 27
参考文献 28
致谢 29
