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[问]为什么在角度变位齿轮组中,标准齿轮(齿顶高降低系数σ=0)与变位齿轮啮合时,无干涉现象? [答]请看标准齿轮啮合,图中双点划线表示齿条插刀,假想它切削一对啮合的标准齿轮。齿条插刀切削齿轮的过程,相当于齿条与齿轮的啮合过程。从图上可知,此时齿条刀具中线与两齿轮的分度圆相切;齿条刀刃与齿轮1的齿廓分别切于B、C两点,与齿轮2的齿廓也切于B、C两点。若把假想齿条刀具抽去,则两齿轮保持无侧隙啮合,
[Q] Why there is no interference when the standard gear (gear tooth height reduction coefficient σ = 0) is meshed with the change gear in the angle change gear set? [A] Look at the standard gear mesh. The two-dot chain line Said rack knife, hypothetical it cutting a pair of standard gears. Rack knife gear cutting process, the equivalent of gear and gear meshing process. Can be seen from the figure, this time the gear rack cutter line and the two gears of the sub-degree circle tangent; rack tooth and gear tooth profile were cut at B, C two points, and gear 2 tooth profile also cut at B, C two o’clock. If the imaginary rack cutter is drawn away, the two gears remain without backlash engagement,