计算选型
|
凸轮和转盘的对应转角位置、机构的角速比及压力角的实例计算 |
|||||||
|
给定条件： θf＝120° f f＝45° f z＝45° z＝8 C＝180mm Rr＝22mm b＝24mm e＝6mm rp2＝84mm rp1＝96mm l＝90mm D t＝231.24mm D＝176.47mm p＝1 H＝1 转盘分度期运动规律：改进正弦加速度 转盘节圆半径 rp2处的压力角计算公式： |
滚子代号 |
f 0/(°) |
|||||
|
No.1 |
22.5 |
||||||
|
No.2 |
-22.5 |
||||||
|
No.3 |
-67.5 |
||||||
|
凸轮 转角 θ/(°) |
转盘角 位移 fi/(°) |
转盘上各个滚子的角位置 f /(°) |
|
转盘节圆半径 rp2处的压力角 α/(°) |
|||
|
No.1 |
No.2 |
No.3 |
No.1 |
No.2 |
|||
|
0 |
0 |
22.50 |
-22.50 |
-67.50 |
0 |
0 |
|
|
2 |
2.4×10-3 |
22.50 |
-22.50 |
-67.50 |
3.6×10-3 |
0 |
|
|
4 |
0.02 |
22.52 |
-22.48 |
-67.48 |
0.01 |
0.5 |
|
|
┇ |
┇ |
┇ |
┇ |
┇ |
┇ |
┇ |
|
|
10 |
0.28 |
22.78 |
-22.22 |
-67.22 |
0.08 |
4 |
|
|
20 |
1.94 |
24.44 |
-20.56 |
-65.56 |
0.25 |
11.3 |
|
|
30 |
5.27 |
27.77 |
-17.23 |
-62.23 |
0.41 |
18.3 |
19.4 |
|
40 |
10.09 |
32.59 |
-12.41 |
-57.41 |
0.54 |
22.8 |
25.1 |
|
50 |
16.00 |
38.50 |
-6.50 |
-51.50 |
0.63 |
25.1 |
28.6 |
|
58 |
21.18 |
43.68 |
-1.32 |
-46.32 |
0.66 |
25.1 |
29.7 |
|
60 |
22.50 |
45.00 |
0 |
-45.00 |
0.66 |
|
30.3 |
|
70 |
29.00 |
51.50 |
6.50 |
-38.50 |
0.63 |
|
28.6 |
|
80 |
34.91 |
57.41 |
12.41 |
-32.59 |
0.54 |
|
25.1 |
|
90 |
39.73 |
62.23 |
17.23 |
-27.77 |
0.41 |
|
19.4 |
|
100 |
33.06 |
65.56 |
20.56 |
-24.44 |
0.25 |
|
12 |
|
110 |
44.72 |
67.22 |
22.20 |
-22.78 |
0.08 |
|
4 |
|
120 |
45 |
67.50 |
22.50 |
-22.50 |
0 |
|
0 |
|
注：计算步长Δ θ＝2°。 |
|||||||
