目次へ 項目 |
はすば歯車 計算式 |
小歯車 1 |
大歯車 2 |
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歯数 |
z |
20 |
40 |
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歯直角モジュール |
mn=d0*cos(β)/z=ms*cos(β) |
4 |
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正面モジュール |
ms=mn/cos(β)=d0/z |
4.257 |
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歯直角圧力角 |
αn=α0=基準圧力角 [deg] |
20 |
5 |
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正面圧力角 |
αs=ATN(tan(αn)/cos(β) [deg] |
21.17283 |
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0.4 |
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ネジレ角 |
β[deg] |
20 |
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基礎ネジレ角 |
βg=ATN{tan(β)*cos(αs)} [deg] |
18.7472 |
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歯直角ピッチ |
tn=π*mn |
12.566 |
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転位係数 |
x |
0 |
0 |
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軸直角カミアイ圧力角 |
inv αb=2*tan α0 *[(x1+x2)/(z1+z2)]+inv αs |
0.017793 |
6 |
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αb |
21.1725 |
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0 |
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工具圧力角 |
α0[deg] |
20 |
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中心距離増加係数 |
y=(z1+z2)*[(cos αs/cos αb)-1]/(2*cos(β) |
-0.00007 |
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転位中心距離 |
ax=[(z1+z2)/{2*cos(β)}+y]*mn=a+y*mn |
127.701 |
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基準歯車中心距離 |
a=(z1+z2)*mn/{2*cos(β)} |
120 |
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カミアイピッチ円直径 |
db=2*ax[z/(z1+z2)] |
85.134 |
170.268 |
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歯先円直径 |
dk=[z1/cos(β)+2+2*(y-x2)]*mn |
93.134 |
178.268 |
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基準ピッチ円直径 |
d0=z*mn/cos(β) |
85.134 |
170.268 |
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工具切込深さ |
h=(2+y-x1-x2)*mn+C |
9 |
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歯末のたけ |
hk=(1+y-x)*m |
4 |
4 |
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転位量 |
x*m |
0 |
0 |
0 |
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基礎円直径 |
Dg=mn*z*cos(αs)/cos(β) |
79.387 |
158.775 |
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マタギ歯数 |
zm |
3 |
5 |
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マタギ歯厚 |
Sm'=mn*cos(α0)*[z*inv_αs+π*(zm-0.5)]+2*x*mn*sin(α0) |
30.642 |
55.38 |
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バックラッシ |
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0.15 〜 0.37 |
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精度 |
JIS B 1702 |
0 |
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0.382 |
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