汽車轉向器畢業(yè)設計

摘  要
汽車轉向器是汽車的重要組成部分，也是決定汽車主動安全性的關鍵總成，它的質量嚴重影響汽車的操縱穩(wěn)定性。隨著汽車工業(yè)的發(fā)展，汽車轉向器也在不斷的得到改進，雖然電子轉向器已開始應用，但機械式轉向器仍然廣泛地被世界各國汽車及汽車零部件生產(chǎn)廠商所采用。而在機械式轉向器中，循環(huán)球齒條-齒扇式轉向器由于其自身的特點被廣泛應用于各級各類汽車上。本文選擇GX1608A型循環(huán)球齒條-齒扇式轉向器作為研究課題，其主要內容有：汽車轉向器的組成分類；轉向器總成方案分析及其數(shù)據(jù)確定和轉向器的設計過程。
這種轉向器的優(yōu)點是，操縱輕便，磨損小，壽命長。缺點是結構復雜，成本高，轉向靈敏度不如齒輪齒條式。因此逐漸被齒輪齒條式取代。但隨著動力轉向的應用，循環(huán)球式轉向器近年來又得到廣泛使用。
關鍵詞；轉向器 操縱穩(wěn)定性 循環(huán)球齒條-齒扇式轉向器

Abstract
Gear cars an important component of the initiative is decided automobile safety of the key assembly, It seriously affected the quality of the vehicle handling and stability. Along with the development of the auto industry, automobile steering gear is continuously improved, although the electronic steering gear has begun to use But mechanical steering gear is still widely been world motor vehicles and parts manufacturers adopted. And the mechanical steering gear, Rack cycle ball-type steering gear tooth fans as its own characteristics has been widely used in various types vehicles. The graduation design options GX1608A cycle gear ball-type steering gear rack as a research topic, Its main contents are : automotive steering gear components classification; assembly was to program analysis and data to identify and steering gear design process.
The advantage of such steering gear, and manipulating light, wear and tear, long life. The disadvantage is that the structure is complicated and costly, than steering rack and pinion sensitivity. Therefore gradually being replaced by rack and pinion. However, with the power steering applications, the ball-type steering gear cycle and are widely used in recent years.
Keywords； Diverter   Ball handling and stability   Cycle rack-type steering gear diverter

目  錄
摘  要 I
Abstract II
1緒論 1
2汽車轉向系的組成及分類 3
2.1汽車轉向系的類型和組成 3
2.1.1 機械式轉向系 6
2.1.2 動力轉向器 7
2.2 轉向系主要性能參數(shù) 8
2.2.1轉向器的效率 8
2.2.2傳動比的變化特性 10
2.2.3轉向盤自由行程 13
2.3 轉向操縱機構及轉向傳動機構 13
2.3.1轉向操縱機構 13
2.3.2轉向傳動機構 14
3轉向器總成方案分析 15
3.1轉向器設計要求 15
3.2轉向器總成方案設計 16
4循環(huán)球式轉向器主要尺寸參數(shù)的選擇 19
5 轉向器輸出力矩的確定 23
6 軸的設計計算及校核 24
6.1 轉向搖臂軸（即齒形齒扇軸）的設計計算 24
6.1.1材料的選擇 24
6.1.2結構設計 24
6.1.3軸的設計計算 24
6.2 螺桿軸設計計算及主要零件的校核 28
6.2.1材料選擇 28
6.2.2結構設計 28
6.2.3軸的設計計算 29
6.2.4鋼球與滾道之間的接觸應力校核 31
參考文獻 33
致 謝 34
附錄 36