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In view of the lack of systemic analysis for stepless transmission using noncircular gears, two basic noncircular gear units, an addition unit adopting differential mechanism and a multiplication unit applying a fixed gear train, are proposed. Then, the design methods of the noncircular gear pair of each unit, transmission ratio relationship, rotation angle relationship and key parameters with specific physical meanings are studied. The adjusting properties, composing strategy and varying range of transmission ratio etc. are investigated in detail for each unit. Following this, several examples of using a noncircular gear pair in the units and their manipulation technique are introduced. 相似文献
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准双曲面齿轮齿面主动设计与先进制造技术 总被引:1,自引:0,他引:1
准双曲面齿轮的具面形状对其传动性能起着决定性的作用。现行齿轮设计技术只能在有限的几种模式中被动地选择齿面形式,这限制了齿轮传动性能的进一步提高。齿面主动设计直接以齿面在其全啮合过程中的主要啮合性能参数作为设计变量来确定齿面的形状参数,齿面形式不受传统的摇台结构机床的限制。研究表明,只需用三轴联动CNC铣齿机就能加工出主动设计得到的啮合性能良好的准双曲面齿轮。本文介绍了确定CNC机床参数的原理,提供了直接面向CNC铣齿机的有关的切齿加工计算公式,并给出了计算示例。 相似文献
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