Abstract:

In view of the influences of rolling and slipping of balls of engagement pair on the transmission accuracy of no-backlash ball precision transmission, applying engagement theory and converted mechanism kinematic analysis methods, the arc length difference was presented to represent sliding characteristics of engagement pairs. Sliding generating mechanism of balls during the transmission process was interpreted. Theoretical analysis mathematical model was established. The change rules of relative sliding velocity and sliding ratio of engagement pairs were analyzed,and variation curves were also plotted. The three-dimensional entity of no-backlash ball precision transmission was established, and kinematics simulation was carried out by using ADAMS. The results show that there is microscale sliding between meshing pairs. When the central plate engages with balls, sliding velocity and sliding rate is more obvious, the wear will be more serious.

Key words: no-backlash ball precision transmission, meshing pair, relative sliding velocity, sliding ratio, kinematics simulation

摘要：

针对无隙钢球精密传动啮合副中钢球滚滑现象对传动精度的影响，运用啮合原理和转化机构运动学分析方法，提出采用弧长差表征啮合副滑动特性的方法，阐释了无隙钢球精密传动啮合副传动过程中钢球滑动产生的机理。建立了理论分析数学模型，分析了滑滚状态下啮合副在啮合传动过程中相对滑动速度和滑动率的变化规律，并绘制了其变化曲线。建立了无隙钢球精密传动啮合副三维实体，并利用ADAMS进行了运动学仿真分析。结果表明，啮合副传动过程存在微量滑动，钢球与中心盘啮合处的滑动速度和滑动率较大，磨损也较严重。

关键词: 无隙钢球精密传动, 啮合副, 相对滑动速度, 滑动率, 运动学仿真