机械原理实验报告-齿轮传动

机械原理实验报告-齿轮传动

机械原理实验

——齿轮传动机构

groups, Wujiang County. In September, the chapter in the Tomb occupied formally established the village of KMT: Wu Jiang County Government (known as "guerrilla Government") and against self-defence groups. Begins to flow from jiaxing railway Lili, Tan Hills area. In November, the County Government is based on the tomb of Lu Xiyan, mine-and from the pier at Dang, under Jin bang. County Government operates three Civil Affairs, finance, education

一( 实验目的

1. 掌握齿轮的相关几何参数的定义及其意义。

2. 了解齿轮传动的构成，认识其组成原件。

3. 掌握齿轮传动比的计算方法。

4. 掌握齿轮的相关几何参数的计算。

5. 训练动手能力，培养综合设计的能力。二( 实验仪器

序号名称数量备注 1 1 试验台机架

2 1 主动轴带轮

3 1 电机轴带轮

4 2 主轴

5 3 端盖

6 2 卡环

三( 实验原理

(一)齿轮参数

groups, Wujiang County. In September, the chapter in the Tomb occupied formally established the village of KMT: Wu Jiang County Government (known as "guerrilla Government") and against self-defence groups. Begins to flow from jiaxing railway Lili, Tan Hills area. In

November, the County Government is based on the tomb of Lu Xiyan, mine-

and from the pier at Dang, under Jin bang. County Government operates three Civil Affairs, finance, education

(二)传动比计算

1、一对齿轮的传动比:

传动比大小:

i12=ω1/ω2 =Z2/Z1

转向外啮合转向相反取“-”号

内啮合转向相同取“+”号

对于圆柱齿轮传动，从动轮与主动轮的转向关系可直接在传动比公式中表示即: i12=?z2/z1

其中"+"号表示主从动轮转向相同，用于内啮合;","号表示主从动轮转向相

反，用于外啮合;对于圆锥齿轮传动和蜗杆传动，由于主从动轮运动不在同一平面内，因此不能用"?"号法确定，圆锥齿轮传动、蜗杆传动和齿轮齿条传动只能用画

箭头法确定。对于齿轮齿条传动，若ω1表示齿轮1角速度，d1表示齿轮1分度圆直径，v2表示齿条的移动速度，存在以下关系:V2=d1ω1/2 定轴齿轮系传动

比，在数值上等于组成该定轴齿轮系的各对啮groups, Wujiang County. In September, the chapter in the Tomb occupied formally established the village of KMT: Wu Jiang County Government (known as "guerrilla Government") and against self-defence groups. Begins to flow from

jiaxing railway Lili, Tan Hills area. In November, the County Government is based on the tomb of Lu Xiyan, mine-and from the pier at Dang, under Jin bang. County Government operates three Civil Affairs, finance, education

合齿轮传动的连乘积，也等于首末轮之间各对啮合齿轮中所有从动轮齿数的连乘积与所有主动轮齿数的连乘积之比。设定轴齿轮系首轮为1轮、末轮为K轮，定轴齿轮系传动比公式为: i=n1/nk=各对齿轮传动比的连乘积i1k=(-1)M所有从动轮齿数的连乘积/所有主动轮齿数的连乘积式中:"1"表示首轮，"K"表示末轮，m表示轮系中外啮合齿轮的对数。当m为奇数时传动比为负，表示首末轮转向相反;当m为偶数时传动比为负，表示首末轮转向相同。

注意:中介轮(惰轮)不影响传动比的大小,但改变了从动轮的转向。

四( 实验分析

(一)齿轮参数的计算

一对渐开线标准外啮合圆柱齿轮传动的模数m=5mm，压力角

=20?，中心距a=350mm，传动比i12=1.8，求两轮的齿数、分度圆直径、齿顶

圆直径、基圆直径以及分度圆上的齿厚和齿槽宽。

(二)传动比的计算

如图所示齿轮系，蜗杆的头数z1=1，右旋;蜗轮的齿数z2=26。一对圆锥齿轮z3=20，z4=21。一对圆柱齿轮z5=21，z6=28. groups, Wujiang County. In September, the chapter in the Tomb occupied formally established the village of KMT: Wu Jiang County Government (known as "guerrilla Government") and against self-defence groups. Begins to flow from

jiaxing railway Lili, Tan Hills area. In November, the County Government is based on the tomb of Lu Xiyan, mine-and from the pier at Dang, under Jin bang. County Government operates three Civil Affairs, finance, education