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  目次へ はすば歯車の計算(ルイスの式) | 
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  はすば歯車の計算(ルイスの式) | 
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  並歯 | 
  歯直角 | 
  ねじれ角 | 
  歯数 Z | 
  回転数
  n | 
  歯幅 B | 
  材料 | 
  硬さHB | 
  転移係数x | 
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  圧力角 | 
  モジュールm | 
  β° | 
  rpm | 
  mm | 
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  1 | 
  小歯車 | 
  20° | 
  4 | 
  30 | 
  20 | 
  1500 | 
  32 | 
  SCM440_浸炭 | 
  Hv600 | 
  0.15 | 
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  SCM440 | 
  2 | 
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  2 | 
  大歯車 | 
  40 | 
  750 | 
  SCM440_浸炭 | 
  Hv600 | 
  -0.15 | 
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  SCM440 | 
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  ●ピッチ円周上の周速 v (m/s) | 
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  v=π*D1*n1/(1000*60)=π*92.4*1500/(1000*60)=7.26
  (m/s) | 
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  ●速度係数 fv | 
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  ●荷重係数 fw | 
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  fv=3.05/(3.05+v)=3.05/(3.05+7.26)=0.3 | 
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  fw=0.74 | 
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  0.74 | 
  0.74 | 
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                                                                                                                                                      | 
 
 
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  ●小歯車:曲げ強さによる接線力 | 
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  ●トルク T [N-m] | 
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  F=σb*B*m*y=92.6*32*4*0.61=7230
  (N) | 
  T=F*D1/2000=7230*92.376/2000=333.939[N-m] | 
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  σb=fv*fw*σ0=0.3*0.74*417=92.6
  (N/mm2) | 
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  σ0=許容曲げ応力=417 (N/mm2) | 
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  ●スラスト Fx [N] | 
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  417 | 
  255 | 
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  y=歯形係数=0.61 | 
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  Fx=F*tan(β)=7230*tan(30)=4174.24[N] | 
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  Z=相当平歯車=30.8 | 
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  ●大歯車:曲げ強さによる接線力 | 
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  ●トルク T [N-m] | 
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  F=σb*B*m*y=92.6*32*4*0.715=8475
  (N) | 
  T=F*D1/2000=8475*184.752/2000=782.887[N-m] | 
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  σb=fv*fw*σ0=0.3*0.74*417=92.6
  (N/mm2) | 
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  417 | 
  107 | 
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  σ0=許容曲げ応力=417 (N/mm2) | 
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  ●スラスト Fx [N] | 
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  y=歯形係数=0.715 | 
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  Fx=F*tan(β)=8475*tan(30)=4893.04[N] | 
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  Z=相当平歯車=61.6 | 
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  ●面圧強さによる接線力 | 
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  ●トルク T [N-m] | 
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  F=fv*k*D1*B*2*Z2/[(Z1+Z2)*(Cos
  β)^2] | 
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  小歯車 | 
  T=F*D1/2000=5992*92.376/2000=276.758[N-m] | 
  3.8 | 
  0.382 | 
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  =0.3*3.8*92.4*32*2*40/[(20+40)*(Cos30)^2] | 
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  大歯車 | 
  T=F*D2/2000=5992*184.752/2000=553.517[N-m] | 
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    =5992 (N) | 
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  ●スラスト Fx [N] | 
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  k=触面応力係数=3.8 | 
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  Fx=F*tan(β)=5992*tan(30)=3459.48[N] | 
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  ●伝達動力 | 
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  P=F*v/1000=5992*7.26/1000=43.5
  (kW) | 
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