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轎車機械式變速器設計

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轎車機械式變速器設計Transmission to change the engine reached on the driving wheel torque and speed, is aimed at marking start, climbing, turning, accelerate various driving conditions, the car was different traction and speed Meanwhile engine in the most favorable working conditions within the scope of the work. And the trans mission in neutral gear with reverse gear. Transmission also need power output function.Gearbox because of the low-grade work at a larger role, In general, the low-grade gearbox layout are close to the axis after support, Following from low-grade to high-grade order of the layout of stalls gear. This will not only allow axis are large enough for a rigid, but also ensures easy assembly. Gear box overall structure and rigid axle and the shell structure of relations. Generally through the control shaft length control over several stalls to ensure that adequate gear box rigid. This paper describes the design of three-axis five block manual trans mission, the transmission principle of work elaborated, Transmission of the gear shaft and do a detailed design, and the intensity of a school. For some standard parts for the selection. Transmission Trans mission program design. A brief description of the trans mission of all components of the material choice.

Keywords : transmission；Transmission ratio；mechanical；Tooth from；

目錄

摘要 I
Abstract II
1 緒論 1
1.1 選題背景及意義 1
1.2 汽車參數的選擇 1
1.3 變速器設計應滿足的基本要求 2
2 變速器傳動機構布置方案 3
2.1 傳動機構布置方案分析 3
2.1.1 固定軸式變速器 3
2.1.2 倒擋布置方案 3
3 零部件結構方案分析 5
3.1 齒輪形式 5
3.2 換擋機構形式 5
3.3 變速器軸承 6
4 變速器設計和計算 8
4.1 擋數 8
4.2 傳動比范圍 8
4.3 中心距A 8
4.4 外形尺寸 9
4.5 軸的直徑 9
4.6 齒輪參數 9
4.6.1 模數的選取 9
4.6.2 壓力角 10
4.6.3 螺旋角 10
4.6.4 齒寬b 11
4.7 各擋齒輪齒數的分配 12
4.7.1 確定一擋齒輪的齒數 12
4.7.2 對中心距進行修正 13
4.7.3 確定常嚙合傳動齒輪副的齒數 13
4.7.4 確定其他各擋的齒數 14
4.7.5 確定倒擋齒輪齒數 14
5 變速器的校核 16
5.1 齒輪的損壞形式 16
5.2 齒輪彎曲強度計算 16
5.3 輪齒接觸應力計算 18
5.4 軸的強度計算 19
6 同步器的選型 22
6.1 鎖銷式同步器 23
6.1.1 鎖銷式同步器結構 23
6.1.2 鎖銷式同步器工作原理 23
6.2 鎖環式同步器 24
6.2.1 鎖環式同步器結構 24
6.2.2 鎖環式同步器工作原理 25
6.2.3 鎖環式同步器主要尺寸的確定 25
結論 28
致謝 29
參考文獻 30
附錄 31
附錄外文文獻 32

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