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本文对平面一次包络环面蜗杆传动不同β角下的接触线分布与啮会状态进行了分析．通过分析，指出β角对啮合状态有很大影响．
In this paper, the distribution of contact lines and the state of interception at different β angles of planar enveloping worm gear drive are analyzed. Through analysis, pointed out that β angle has a great influence on the state of engagement.