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自从十八世纪六十年代人们开始用园的渐开线作齿轮的齿廓线以来,由于渐开线齿轮在制造和安装方面的优越性以及传动平稳、承载能力强等优点,使它获得了广泛的应用与发展,至今已有二百多年的历史。目前,渐开线齿轮的标准压力角,各主要工业国家如英、法、西德、日本、苏联等都规定为20°,美国规定为20°与14.5°,也还有些国家规定标准压力角为15°、17°、17.5°、22.5°、25°,30°等,我国规定的标准压力角有20°与15°两种,常用的为20°。那么,为什么要规定
Since the people began to use the involute of the garden as the gear profile of the gear since the 1860s, the advantage of the involute gear in manufacturing and installation, as well as the advantages of stable transmission and strong carrying capacity, Extensive application and development, has been more than two hundred years of history. At present, the involute gear standard pressure angle, the major industrial countries such as Britain, France, West Germany, Japan, the Soviet Union and so on are all set at 20 °, the United States provides 20 ° and 14.5 °, there are still some countries the standard pressure angle 15 °, 17 °, 17.5 °, 22.5 °, 25 °, 30 ° and so on. The standard pressure angle specified in our country is 20 ° and 15 °, commonly used as 20 °. So, why should we provide