本文讨论了摆线针轮减速器和悬臂式双偏心渐开线少齿差减速器中两个行星轮的受力问题,发现以往假设这两个行星轮同时分担输出载荷是错误的。通过详细的受力分析,得出如下结论: 1.双偏心结构的效率比单偏心结构低,功率损耗增加25.2％。 2.双偏心结构与单偏心结构相比,齿轮和转臂轴承的承载能力要降低11.2％。 3.目前按照手册设计的减速器,因其假设条件不对,所以其齿轮和转臂轴承的负载均比设计载荷超出175.2％,有破坏的危险。为此,应该用单偏心结构代替双偏心结构,这样既能提高性能,又可降低成本。 This paper discusses the force problem of two planetary gears in cycloid reducer and cantilever double-eccentric involute gear reducer. It is found that it is wrong to assume that the two planetary gears share the output load at the same time. Through a detailed analysis of the force, the following conclusions can be drawn: 1. The double eccentric structure has lower efficiency than the single eccentric structure, and the power loss increases by 25.2%. 2. Double eccentric structure Compared with the single eccentric structure, the bearing capacity of the gear and the arm bearing should be reduced by 11.2%. 3. At present, the decelerators designed according to the manuals are in danger of being damaged because their assumptions are not correct, so the load on the gears and the arm bearings exceeds the designed load by 175.2%. For this reason, the double eccentric structure should be replaced by a single eccentric structure, which not only improves the performance but also reduces the cost.