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变位齿轮传动几何尺寸计算(YTF-91滚80齿)m0.6Z134Z29α20ha*1c*0.25invα0.014904383invα′0.038103998a′13.6未变位时的中心距a=1/2*m(Z1+Z2)a12.9中心距变动系数у=(a′-a)/my1.166666667啮合角cosα′=a/a′*cosαα′26.95964172总变位系数x∑=(Z1+Z2)/(2*tanα)*(invα′-invα)x∑1.370419007Z∑=Z1+Z2Z∑43Z∑/221.5变位系数的分配及齿高变动系数x1、x2或△yx10.44x1、x2可按图3-3-2、3-3-3分配x20.47△y=x∑-y=△yz(Z1+Z2)/2△y0.203752341齿数比u=Z2/Z1u0.264705882分度圆直径d=Zmd120.4d25.4节圆直径d1′=2a′/(u+1)d1′21.50697674d2′=ud1′d2′5.693023256齿顶高ha=(ha*+x-△y)mha10.741748596ha20.759748596齿根高hf=(ha*+c*-x)mhf10.486hf20.468齿全高h=(2ha*+c*-△y)mh11.227748596h21.227748596齿顶圆直径da=d+2(ha*+x-△y)mda121.88349719da26.919497191齿根圆直径df=d-2(ha*+c*-x)mdf119.428df24.464公法线跨齿数k=α/180°*Z+0.5+2*x/(3.1415926*tanα)k14.277777778k22.3220763跨齿数圆整k=floor(k1,1)k14k22公法线长度Wk=mcosα(3.1415926(k-0.5)+Zinvα+2xtanα)Wk16.665775544Wk22.925447518变位量X=x*m(x称变位系数)