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目次へ すぐばかさ歯車の計算[JGMA規格] |
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FALSE |
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すぐばかさ歯車の計算[JGMA規格] |
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90 |
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並歯 |
圧力角 |
モジュールm |
歯数 Z |
回転数
n |
有効歯幅 B |
材料 |
歯面硬度 |
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0 |
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[deg] |
[rpm] |
[mm] |
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1 |
小歯車 |
20 |
4 |
20 |
1500 |
15 |
SCM415_浸炭 |
Hv600 |
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SCM415 |
SCM415 |
2 |
8 |
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2 |
大歯車 |
40 |
750 |
SCM415_高周波 |
Hv600 |
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SCM415 |
SCM415 |
1 |
28 |
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●ピッチ円周上の周速 |
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v=π*d01*n1/(1000*60)=π*80*1500/(1000*60)=6.283
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d01=ピッチ円直径= |
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80 |
[mm] |
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n1=小歯車回転数= |
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1500 |
[rpm] |
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●小歯車:曲げ強さによる接線力 |
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F=0.85*cos(βm)*σ0*m*B*(Ra-0.5*B)*KL*Kfx/(Ra*Yf*Yε*Yβ*Yc*Km*Kv*K0*Kr) |
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=0.85*cos(0)*417*4*15*(89.443-0.5*15)*1*1/(89.443*2.37*0.613*1*1.15*1.8*1.4*1*1.2) |
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=3856.4[N] |
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βm=中央ねじれ角= |
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0 |
[deg] |
●トルク |
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Ra=外端円すい距離= |
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89.443 |
[mm] |
T=F*dm1/2 |
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Yf=歯形係数[30°接線法による]= |
2.37 |
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=3856.4*73.29/2=154.26[N-m] |
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Yε=荷重分配係数=1/εα= |
0.613 |
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●スラスト |
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εα=正面かみ合い率= |
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1.632 |
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Fx=F*tan(α)*sin(δ1) |
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Yβ=ねじれ角係数= |
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1 |
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=3856.4*tan(20)*sin(26.56505)=627.72[N] |
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Yc=工具直径影響係数= |
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1.15 |
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KL=寿命係数= |
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1 |
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Kfx=歯元応力に対する寸法係数= |
1 |
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Km=歯すじ荷重分布係数 |
1.8 |
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Kv=動荷重係数= |
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1.4 |
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K0=過負荷係数= |
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1 |
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Kr=信頼度係数= |
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1.2 |
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σ0=許容歯元曲げ応力= |
417 |
[N/mm2] |
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●大歯車:曲げ強さによる接線力 |
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F=0.85*cos(βm)*σ0*m*B*(Ra-0.5*B)*KL*Kfx/(Ra*Yf*Yε*Yβ*Yc*Km*Kv*K0*Kr) |
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=0.85*cos(0)*417*4*15*(89.443-0.5*15)*1*1/(89.443*2.397*0.613*1*1.15*1.8*1.4*1*1.2) |
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=3813[N] |
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●トルク |
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Yf=歯形係数[30°接線法による]= |
2.397 |
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T=F*dm2/2 |
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σ0=許容歯元曲げ応力= |
417 |
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=3813*146.58/2=279.45[N-m] |
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Kfx=歯元応力に対する寸法係数= |
1 |
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●スラスト |
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Fx=F*tan(α)*sin(δ2) |
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=3813*tan(20)*sin(63.43495)=1241.3[N] |
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●小歯車:面圧強さによる接線力 |
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F=(σh0/Zm)^2*[d01/cos(δ01)]*[(Ra-0.5*B)/Ra]*B*[i^2/(i^2+1)] |
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*[KHL*ZL*Zr*Zv*Zw*Khx/(Zh*Zc*Zβ)]^2*[1/(Khβ*Kv*K0*Cr^2)] |
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=(1607/190)^2*[80/cos(26.56505)]*[(89.443-0.5*15)/89.443]*15*[2^2/(2^2+1)] |
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*[1*1*0.9*0.97*1*1/(2.495**1)]^2*[1/(2.1*1.4*1*1.15^2)]=2214.9[N] |
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σh0=許容ヘルツ応力= |
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1607 |
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●トルク |
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d01=小歯車ピッチ円径= |
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80 |
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T=F*dm1/2 |
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δ01=ピッチ円すい角= |
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26.5651 |
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=2214.9*73.29/2=81.17[N-m] |
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i=歯数比=Z2/Z1= |
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2 |
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●スラスト |
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Zh=領域係数= |
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2.495 |
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Fx=F*tan(α)*sin(δ1) |
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Zm=材料定数係数= |
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190 |
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=2214.9*tan(20)*sin(26.56505)=360.52[N] |
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Zε=かみあい率係数= |
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1 |
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Zβ=ねじれ角係数= |
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1 |
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KHL=寿命係数= |
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1 |
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ZL=潤滑油係数= |
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1 |
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Zr=粗さ係数= |
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0.9 |
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Zv=潤滑速度係数= |
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0.97 |
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Zw=硬さ比係数= |
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1 |
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Khx=寸法係数= |
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1 |
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Khβ=荷重分布係数= |
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2.1 |
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Kv=動荷重係数= |
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1.4 |
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K0=過負荷係数= |
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1 |
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Cr=歯面強さに対する信頼度係数= |
1.15 |
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●大歯車:面圧強さによる接線力 |
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F=(σh0/Zm)^2*[d01/cos(δ01)]*[(Ra-0.5*B)/Ra]*B*[i^2/(i^2+1)] |
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*[KHL*ZL*Zr*Zv*Zw*Khx/(Zh*Zc*Zβ)]^2*[1/(Khβ*Kv*K0*Cr^2)] |
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F=(1607/190)^2*[160/cos(63.43495)]*[(89.443-0.5*15)/89.443]*15*[2^2/(2^2+1)] |
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*[1*1*0.9*0.97*1*1/(2.495**1)]^2*[1/(2.1*1.4*1*1.15^2)]=2214.9[N] |
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σh0=許容ヘルツ応力= |
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1607 |
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●トルク |
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ZL=潤滑油係数= |
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1 |
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T=F*dm2/2 |
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Zv=潤滑速度係数= |
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0.97 |
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=2214.9*146.58/2=162.33[N-m] |
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●スラスト |
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Fx=F*tan(α)*sin(δ2) |
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=2214.9*tan(20)*sin(63.43495)=721.05[N] |
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●伝達動力 |
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P=F*vm/1000=2214.9*5.756/1000=12.75
(kW) |
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vm=中央ピッチ円上の周速= |
5.756 |
[m/s] |
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F=中央ピッチ円上の許容円周力= |
2214.9 |
[N] |
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