[整理版]标准链轮尺寸

[整理版]链轮 ?标准链轮的尺寸 P:节距，R:滚子直径 ，N:链轮的齿数 ◎节距直径PCD = P/(sin180?/N) ◎外径OD = P/(0.6+cot180?/N) 下表给出一种标准节距链轮的节距直径和外径(节距1)。 例: 为了得到120号NT(齿数)25链轮的节径和外径从表中可得到节距为7.9789。因此PCD=38.1×7.9789=303.98847，或者取小数点后1位并四舍五入303.99。 外径可从表中查得为8.516。因此OD=38.10×8.516=324.4596，或取小数点后1位并四舍五入324。 齿根圆直径BD=PCD—R 最大齿根距离(卡钳测量):CD 对于奇数齿:CD=PCDcos90/N—R 对于偶数齿:CD=BD ?节距直径系数和外径系数清单 (mm) 系数 系数 系数 系数 系数 系数 齿数 齿数 齿数 1/[sin(180/N)] 0.6+cot(180/N) 1/[sin(180/N)] 016+cot(180/N) 1/[sin(180/N)] 0.6+cot(180/N) 11 3.5495 4.006 52 16.2441 16.813 12 3.8637 4.332 52 16.5622 17.132 13 4.1786 4.657 53 16.8803 17.451 14 4.4940 4.981 54 17.1984 17.769 91 28.9720 29.290 15 4.8097 5.305 55 17.5166 18.088 92 29.2902 29.873 16 5.1258 5.627 56 17.8347 18.407 93 29.6085 30.192 17 5.4422 5 950 57 18.1529 18.725 94 29.9267 30.510 18 5.7588 6.271 58 18.4710 19.044 95 30.2449 30.828 19 6.0755 6 593 59 18.7892 19.363 96 30.5632 31.147 20 6.3925 6 914 60 19.1073 19.681 97 30.8815 31.465 2l 6.7095 7.235 61 19.4255 20.000 98 31.1997 31.784 22 7.0267 7.555 62 19.7437 20.318 99 31.5180 32.102 23 7.3439 7 876 63 20.0618 20.637 100 31.8362 32.421 24 7.6613 8 196 64 20.3800 20.955 101 32.1545 32.739 25 7.9787 8.516 65 20.6982 21.274 102 32.4727 33.057 26 8.2962 8.836 66 21.0164 21.593 103 32.7910 33.376 27 8.6138 9.156 67 21.2349 21.911 104 33.1093 33.694 28 8.9314 9.475 68 21.6528 22.230 105 33.4275 34.013 29 9.2491 9.795 69 21.9710 22.548 106 33.7458 34.331 30 9.5668 10.114 70 22.2892 22.867 107 34.0641 34.694 31 9.8845 10.434 71 22.6074 23.185 108 34.3823 34.968 32 10.2023 10.753 72 22.9256 23.504 109 34.7006 35.286 33 10.5201 11.072 73 23.2438 23.822 110 35.0189 35.605 34 10.8380 11.392 74 23.5620 24.141 111 35.3371 35.923 35 11.1558 11.711 75 23.8802 24.459 112 35.6554 36.241 36 11.4737 12.030 76 24.1984 24 778 113 35.9737 36.560 37 11.7916 12.349 77 24.5167 25.096 114 36.2919 36.878 38 12.1096 12.668 78 24.8349 25.415 115 36.6102 37.197 39 12.4275 12.987 79 25.1531 25.733 116 36.9285 37.515 40 12.7455 13.306 80 25.4713 26.052 117 37.2467 37.833 41 13.0635 13.625 81 25.7896 26.370 118 37.5650 38.152 42 13.3815 13.944 82 26.1078 26.689 119 37.8833 38.470 43 13.6995 14.363 83 26.4261 27.007 120 38.2016 38.788 44 14.0175 14.582 84 26.7443 27.326 45 14.3356 14 901 85 27.0625 27.644 46 14.6536 15.219 86 27.3807 27.962 47 14.9717 15.538 87 27.6990 28.281 48 15.2898 15.857 88 28.0172 28.599 49 15.6079 16.176 89 28.3355 28.918 50 15.9260 16.495 90 28.6537 29.236