无系杆摆线针轮啮合副齿廓修形的设计

Design of Teeth Profile Modification on No Tie Bar Xycloidal Pair

为解决全液压转向器转子转动不灵活的问题,在分析现有摆线针轮啮合副齿廓修形理论基础上,建立摆线副修形的相对性概念和间隙分布评价指标,提出无系杆摆线副修形的主要目标应使初始间隙分布均匀,选择的修形方式为等距修形.以BZZ全液压转向器中的摆线副基本齿形参数进行实例计算,与等距加移距修形的初始间隙进行对比,并通过试验证明.结果表明,在无系杆摆线副中,等距修形方式的初始间隙小,间隙分布均匀,转子转动灵活,并提高了全液压转向器的密封性.

On the basis of the modification theory, relative modification concept of cycloidal gear pair and the appraisal index of the initial backlash are built to solve the problem that cycloidal gear works unsmoothly in pin wheel of the full- hydrostatic steering control units. The major goal of modification is a uniformity of initial backlash, so equidistance modification that has good effect on improving quality of fluid cycloidal pair is chosen. As an example of rp = 34 mm rrp=11.1 mm a = 3. 8 mm, the BZZ full-hydrostatic steering control units cycloidal pair parameter, the initial backlash of equidistance is compared with that of equidistance and the moved distance. The obtained result shows that the initial backlash of modification of equidistance is small and symmetrical in no tie bar cycloidal pair, cycloidal gear is smoothly running in pin wheel, and the sealing performance improves.