共17頁，字數(shù)總計：10799

目 錄

摘要 ………………………………………………………………3
英文摘要 …………………………………………………………4
前言 ………………………………………………………………6
1、 汽車變速器概述…………………………………………7
2、 變速器操縱機構…………………………………………7
3、 多軌式變速器操縱機構…………………………………8
3.1、結構特點 ……………………………………………8
3.2、鎖止裝置 ……………………………………………9
4、 單軌式變速器操縱機構…………………………………11
4.1、結構特點 ……………………………………………12
4.2、鎖止裝置 ……………………………………………12
5、 操縱機構對撥叉的要求…………………………………13
6、 兩種變速器操縱機構的對比……………………………14
7、 優(yōu)化設想…………………………………………………15
結束語……………………………………………………………16
參考文獻…………………………………………………………17



汽車變速器換檔自鎖裝置的
設計與分析研究

指導教師 ：
摘要 ：本課題的研究，主要是分析單軌式和多軌式變速器操縱機構，對比兩種不同結構的操縱機構分析其各自的結構特點，鎖止裝置的不同，適用場合也不徑相同，最后通過對比分析提出自己的優(yōu)化設想。
從分析單軌式和多軌式變速器操縱機構的機構特點著手，先對兩種不同操縱機構所應用的變速器進行對比，分析兩種變速器各自的優(yōu)缺點及其使用場合。再對兩種操縱機構進行分析，對比結構上有的不同之處。由于多軌式操縱機構有多根撥叉軸組成，單軌式操縱機構只有一根撥叉軸，那么這兩種操縱機構的撥叉軸放置方式就存在差異。多軌式操縱機構每根撥叉軸上都裝一個撥叉，而單軌式操縱機構所有的撥叉都是裝在同一根撥叉軸上，單軌式操縱機構相對于多軌式操縱機構減少了撥叉軸的數(shù)量，改變了操縱機構的整體結構，使變速器操縱機構的結構更加緊湊，對撥叉的布置方式也作了極大的改變，那么對撥叉的結構設計也會造成一定的影響。
汽車在行駛中由于道路條件不好或是承載量過大等一些因素的影響，容易造成變速器的自行脫檔。所以保證變速器在任何情況下都能準確、安全、可靠的工作是變速器設計的關鍵，那么對于操縱機構就得提出一定的要求，必須保證變速器不自行掛檔和脫檔，不能同時掛上兩個檔位，還有不能誤掛倒檔。所以就要求變速器操縱機構必須具有可靠的鎖止裝置。
無論多軌式還是單軌式的變速器操縱機構，它都有自鎖裝置、互鎖裝置和倒檔鎖裝置。基于兩種變速器操縱機構結構上的差異，其各大鎖止裝置的結構也是不盡相同的。但總的來說，變速器操縱機構鎖止裝置的作用就是為了使撥叉有個準確的定位，從而使變速器只能掛上一個檔位和所掛檔位不自行改變，保證了行車的安全性。


關鍵詞：變速器 操縱機構 鎖止裝置 自鎖 互鎖








Analysis, study and design on shifting self-locked device of transmission in automobile
Education on car maintenance engineering2002 sunbin Director : jinfu ding
(College of Applied Higher Technology, Zhejiang Normal University )
Abstract : The research of this topic, mainly is to analyze the single-selector rod type and multiple-selector rod type shifting device in transmission. contrast two kinds of dissimilarities structure and characteristics of each equipment. Analyze the difference of two kings of locking device. And they have different applied situation. Finally, we can put forward our improvements.
When analyze the characteristic of the selector mechanism of single-selector rod and multiple-selector rod transmission. Firstly, we can contrast two kinds of different transmission, analyze their merit and applied situation. And secondary analyze the structure of two different selector mechanism. The multiple-selector rod selector mechanism has multiple selector rods, but the single-selector rod type has only one. So there are much difference on structure.Each selector rod of multiple-selector rod transmission mounted a selector fork, but on the single-selector rod transmission, there has only one selector rod for many selector forks. Comparing with the multiple-selector rod transmission, the single-selector rod transmission decreasing the sum of selector rods, changing the structure of transmission and make it closely. The single-selector rod transmission changing the arrangement of the selector rod tremendously, so it can also affect the structure of selector fork.
Because of the rough road condition or the heavy load affecting, it easily drop out from the normal driving situation for the selector mechanism in transmission. Above all, it is the most important to assure transmission run accurately, safely and dependable under all circumstances on the design of transmission. So we have to put forward some request for the selector mechanism. We must assure that the selector mechanism doesn’t shift by no shift power (holding the gear in position).and prevent two gears being obtained at the same time, and the reverse gear being obtained at driving forward. So we require the selector mechanism with dependable lock equipment.
Both of the selector mechanism in multiple-selector rod transmission and single-selector rod transmission, they are all having self-locked, interlock and reverse-locked device. Because of tw..