设计简介
摘 要
变速箱是由装在变速箱壳体内各轴上不同齿数的齿轮和操纵机构组成的。根据需要将不同轴上不同齿数的齿轮啮合在一起，进行变速和改变从动齿轮的转动方向，达到改变扭矩，转速和行驶方向的目的。变速箱可改变传动比，实现倒档和实现空挡。在变速箱中，齿轮，轴和轴承起着重要的作用。在设计的过程中要对齿轮进行强度校核；对轴进行强度和刚度校核；对轴承进行寿命和极限转速校核。变速箱的操纵机构设计包括换挡机构设计和锁定机构设计两部分。锁定机构设计包括自锁机构设计，互锁机构设计和联锁机构设计。
关键字：齿轮 操纵机构 轴 轴承 锁定机构
DESING of a CERTAIN TYPE of TRACTOR GEARBOX
Gearbox is mounted on the shaft inside the gearbox housing of the gear teeth of different institutions and manipulation. According to the different needs of different axis of the gear teeth mesh together, the driven gear change speed and direction of rotation to change the torque, speed and direction for the purpose of traveling. Gearbox Can change the transmission ratio to achieve the realization of reverse and neutral. In the gearbox, the gear, shaft and bearings play an important role. In the process of designing the gear to check for strength; on the shaft to check the strength and stiffness; on the life of the bearings and check the limits of speed. Transmission shift control mechanism design, including design and the design of locking mechanism in two parts. The design of locking mechanism, including self-locking design, interlocking design and the design of interlocking institutions
Key words: Gear Manipulation of body Axis Bearing Locking mechanism
目 录
1 绪论 ............................................................................................................ ..1
1.1 变速箱概述..............................................................................................1
1.1.1 变速箱的功用.......................................................................................1
1.1.2 变速箱的类型....................................................................................1
1.1.3 变速箱的工作原理............................................................................2
2 变速箱设计要求及初始数据........................................................................3
2.1 变速箱设计要求...................................................................................3
2.2 变速箱设计初始数据...........................................................................3
3 变速箱设计过程........................................................................................... 4
3.1 变速箱的设计步骤...............................................................................4
3.2 变速箱结构的选择............................................................................... 4
3.3 根据总体计算确定挡位数与各档传动比...........................................4
3.4 根据总体布置要求确定变速箱外形尺寸允许范围...........................5
3.5 草拟变速箱的传动方案.......................................................................5
3.6 变速箱主要参数的确定.......................................................................6
3.6.1 齿轮模数的确定......................................................................6
3.6.2 齿轮压力角的确定..................................................................6
3.6.3 齿宽的确定..............................................................................6
3.6.4 相齿合齿轮的齿数和
.........................................................8
3.7 选配齿轮.....................................................................................8
3.8 变速箱主要零件的计算.............................................................................9
3.7.1 齿轮的计算....................................................................................9
3.7.2 轴的计算......................................................................................12
3.7.3 轴承的计算...................................................................................16
4 主要零件的布置要点及倒档和减速器的布置方案............................... .. 18
4.1 变速箱主要零件的布置要点.................................................................18
4.2 倒档和减速器的布置方案.....................................................................18
4.2.1 倒档布置方案.............................................................................18
4.2.2 减速器布置方案.........................................................................19
5 变速箱壳和操纵机构的设计.......................................................................19
5.1 变速箱壳的设计....................................................................................19
5.2 变速箱操纵机构的设计........................................................................19
5.2.1换挡机构................................................................................. ..20
5.2.2锁定机构......................................................................................20
参考文献.............................................................................................................21
致 谢........................................................................................................... .. 22
附 录 ................................................................................................... ........ 22
1 各档的传动简图...........................................................................................23
1.1 慢Ⅰ档的传动简图.............................................................................. .23
1.2 慢Ⅱ档的传动简图............................................................................. ..23
1.3 慢Ⅲ档的传动简图................................................................................ 23
1.4 慢Ⅳ档的传动简图.............................................................................. .24
1.5 慢Ⅴ档的传动简图................................................................................24
1.6 快Ⅰ档的传动简图................................................................................25
1.7 快Ⅱ档的传动简图................................................................................25
1.8 快Ⅲ档的传动简图................................................................................26
1.9 快Ⅳ档的传动简图................................................................................26
1.10 快Ⅴ档的传动简图..............................................................................26
1.11 倒Ⅰ档的传动简图..............................................................................27
1.12 倒Ⅱ档的传动简图..............................................................................27
2 变速箱各档次的传动路线及传动比...........................................................27
3 变速箱内各齿轮分布图...............................................................................28
4 直齿圆柱齿轮参数.......................................................................................29
5 变速箱中间轴上渐开线花键参数...............................................................31
6 第二轴齿轮参数...........................................................................................32
7 三，四速滑动齿轮的齿轮参数...................................................................33
8 三速主动齿轮的齿轮参数...........................................................................34
9 三速主动齿轮渐开线花键参数...................................................................35
变速箱是由装在变速箱壳体内各轴上不同齿数的齿轮和操纵机构组成的。根据需要将不同轴上不同齿数的齿轮啮合在一起，进行变速和改变从动齿轮的转动方向，达到改变扭矩，转速和行驶方向的目的。变速箱可改变传动比，实现倒档和实现空挡。在变速箱中，齿轮，轴和轴承起着重要的作用。在设计的过程中要对齿轮进行强度校核；对轴进行强度和刚度校核；对轴承进行寿命和极限转速校核。变速箱的操纵机构设计包括换挡机构设计和锁定机构设计两部分。锁定机构设计包括自锁机构设计，互锁机构设计和联锁机构设计。
关键字：齿轮 操纵机构 轴 轴承 锁定机构
DESING of a CERTAIN TYPE of TRACTOR GEARBOX
Gearbox is mounted on the shaft inside the gearbox housing of the gear teeth of different institutions and manipulation. According to the different needs of different axis of the gear teeth mesh together, the driven gear change speed and direction of rotation to change the torque, speed and direction for the purpose of traveling. Gearbox Can change the transmission ratio to achieve the realization of reverse and neutral. In the gearbox, the gear, shaft and bearings play an important role. In the process of designing the gear to check for strength; on the shaft to check the strength and stiffness; on the life of the bearings and check the limits of speed. Transmission shift control mechanism design, including design and the design of locking mechanism in two parts. The design of locking mechanism, including self-locking design, interlocking design and the design of interlocking institutions
Key words: Gear Manipulation of body Axis Bearing Locking mechanism
目 录
1 绪论 ............................................................................................................ ..1
1.1 变速箱概述..............................................................................................1
1.1.1 变速箱的功用.......................................................................................1
1.1.2 变速箱的类型....................................................................................1
1.1.3 变速箱的工作原理............................................................................2
2 变速箱设计要求及初始数据........................................................................3
2.1 变速箱设计要求...................................................................................3
2.2 变速箱设计初始数据...........................................................................3
3 变速箱设计过程........................................................................................... 4
3.1 变速箱的设计步骤...............................................................................4
3.2 变速箱结构的选择............................................................................... 4
3.3 根据总体计算确定挡位数与各档传动比...........................................4
3.4 根据总体布置要求确定变速箱外形尺寸允许范围...........................5
3.5 草拟变速箱的传动方案.......................................................................5
3.6 变速箱主要参数的确定.......................................................................6
3.6.1 齿轮模数的确定......................................................................6
3.6.2 齿轮压力角的确定..................................................................6
3.6.3 齿宽的确定..............................................................................6
3.6.4 相齿合齿轮的齿数和
.........................................................83.7 选配齿轮.....................................................................................8
3.8 变速箱主要零件的计算.............................................................................9
3.7.1 齿轮的计算....................................................................................9
3.7.2 轴的计算......................................................................................12
3.7.3 轴承的计算...................................................................................16
4 主要零件的布置要点及倒档和减速器的布置方案............................... .. 18
4.1 变速箱主要零件的布置要点.................................................................18
4.2 倒档和减速器的布置方案.....................................................................18
4.2.1 倒档布置方案.............................................................................18
4.2.2 减速器布置方案.........................................................................19
5 变速箱壳和操纵机构的设计.......................................................................19
5.1 变速箱壳的设计....................................................................................19
5.2 变速箱操纵机构的设计........................................................................19
5.2.1换挡机构................................................................................. ..20
5.2.2锁定机构......................................................................................20
参考文献.............................................................................................................21
致 谢........................................................................................................... .. 22
附 录 ................................................................................................... ........ 22
1 各档的传动简图...........................................................................................23
1.1 慢Ⅰ档的传动简图.............................................................................. .23
1.2 慢Ⅱ档的传动简图............................................................................. ..23
1.3 慢Ⅲ档的传动简图................................................................................ 23
1.4 慢Ⅳ档的传动简图.............................................................................. .24
1.5 慢Ⅴ档的传动简图................................................................................24
1.6 快Ⅰ档的传动简图................................................................................25
1.7 快Ⅱ档的传动简图................................................................................25
1.8 快Ⅲ档的传动简图................................................................................26
1.9 快Ⅳ档的传动简图................................................................................26
1.10 快Ⅴ档的传动简图..............................................................................26
1.11 倒Ⅰ档的传动简图..............................................................................27
1.12 倒Ⅱ档的传动简图..............................................................................27
2 变速箱各档次的传动路线及传动比...........................................................27
3 变速箱内各齿轮分布图...............................................................................28
4 直齿圆柱齿轮参数.......................................................................................29
5 变速箱中间轴上渐开线花键参数...............................................................31
6 第二轴齿轮参数...........................................................................................32
7 三，四速滑动齿轮的齿轮参数...................................................................33
8 三速主动齿轮的齿轮参数...........................................................................34
9 三速主动齿轮渐开线花键参数...................................................................35
