Abstract: In order to analysis the meshing characteristics of hypoid gears with extended epicycloid, including contact pattern, bending stress, contact ratio and transmission error, the finite element analysis and experiments are carried on. The simulation result is shown that the contact area of the tooth surface at a certain time is approximately oval, which increases first and then decreases on a single tooth surface during the meshing process. For both the pinion and gear, the danger points on the tooth root are mainly subjected to tensile stress. The danger point of the pinion is subjected to tensile stress first, then compressive stress, while the danger point of the gear is opposite. The contact ratio of the gear increases with the increase of load. The transmission error is greatly affected by the load, and the transmission error under small load is large. With the increase of the load, it decreases and then increases, and then gradually decreases stable. The research content of this article has certain guiding significance for the design and use of hypoid gears.

Key words: Hypoid gear; Contact pattern; Bending stress; Contact ratio; Transmission error

摘要： 为了研究延伸外摆线准双曲面齿轮的啮合特性，基于有限元仿真和试验，分析了齿面 接触斑点、齿根弯曲应力、重合度和传动误差等啮合特性。结果表明，某一时刻齿面接触区 域近似为椭圆形，齿轮啮合过程中，单个齿面上的椭圆形接触面积先增大后减小；大小齿轮 齿根危险点均主要承受拉应力，小齿轮危险点先承受拉应力，再承受压应力，而大齿轮危险 点则相反；齿轮重合度随载荷的增加而逐渐增大；齿轮传动误差受载荷影响较大，小载荷下 传动误差较大，随载荷的增加先减小后增大，最后缓慢减小趋于稳定。文章的研究内容对准 双曲面齿轮的设计和使用具有一定指导意义。

关键词: 准双曲面齿轮；接触斑点；弯曲应力；重合度；传动误差