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 |
4.6188 |
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歯直角圧力角 |
αn=α0=基準圧力角 |
20 |
5 |
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正面圧力角 |
αs=ATN(tan(αn)/cos(β) |
22.7959 |
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ネジレ角 |
β=ACOS(z*mn/d0) |
30 |
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基礎ネジレ角 |
βg=ATN{tan(β)*cos(αs)} |
28.0243 |
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歯直角ピッチ |
tn=π*mn |
12.566 |
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転位係数 |
x |
0.15 |
-0.15 |
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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 |
0.022414 |
6 |
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αb |
22.796 |
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工具圧力角 |
α0 |
20 |
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中心距離増加係数 |
y=(z1+z2)*[(cos αs/cos αb)-1]/(2*cos(β) |
0.000025 |
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転位中心距離 |
ax=[(z1+z2)/{2*cos(β)}+y]*mn=a+y*mn |
138.564 |
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基準歯車中心距離 |
a=(z1+z2)*mn/{2*cos(β)} |
138.564 |
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カミアイピッチ円直径 |
db=2*ax[z/(z1+z2)] |
92.376 |
184.752 |
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歯先円直径 |
dk=[z1/cos(β)+2+2*(y-x2)]*mn |
101.576 |
191.552 |
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ピッチ円直径 |
d0=z*mn/cos(β) |
92.376 |
184.752 |
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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=(dk-d0)/2 |
4.6 |
3.4 |
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転位量 |
x*m |
0.6 |
-0.6 |
4 |
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基礎円直径 |
Dg=mn*z*cos(αs)/cos(β) |
85.161 |
170.321 |
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マタギ歯数 |
zm |
4 |
7 |
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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) |
43.426 |
79.716 |
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バックラッシ |
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0.16 〜 0.4 |
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精度 |
JIS B 1702 |
0 |
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0.382 |
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