考虑尺寸公差的摆线齿廓修形方法

Modification method on cycloidal profile considering dimensional tolerances

针对摆线针轮机构精度高、回差小及传动平稳的特点,提出了一种摆线齿廓修形补偿零部件尺寸偏差,以空回误差最小为目标的摆线齿廓修形方法。分析零部件尺寸偏差对啮合间隙或过盈的影响,针对各尺寸公差引起的侧隙或干涉量设计修形方案,确定摆线齿廓修形方式和修形量。在此基础上,建立考虑摆线齿廓修形和零部件尺寸偏差的空回误差分析模型;通过仿真研究尺寸偏差对机构回差的影响规律,表明所设计的修形方案可实现机构回差最小的目的,验证了该方法的有效性。提出的修形方法为摆线齿廓修形提供了一种新的思路。

Aiming at cycloid-pin gear transmission with characteristics of high precision, small backlash and stationary transmission, a modification method of cycloidal profile, which compensated cycloidal profile modification for components of dimensional deviation and targets at the minimum backlash, was illuminated. The influence of components dimensional deviation on meshing clearance or interference was analyzed, and modification solution was designed according to meshing clearance or interference caused by each dimensional deviation, then cycloidal modification method and modification amount were determined. On this basis, the backlash analysis model was established with the consideration of the influences of cycloidal profile modification and components of dimensional deviation. The effect of dimensional deviation on mechanism backlash was researched by simulation, and the results indicated that the designed modification solution could achieve the goal of minimum mechanism backlash, effectiveness is verified. The proposed method provides a new idea for the modification of cycloidal profile.