With three noncircular gear items integrated, a new noncircular planetary differential was put forward, which may deliver variable proportional torque onto its two output axes and help to improve passing capacity for off-road vehicles. The new differential has two uniform centre gears, meshing with three double planetary gears, the double planetary gears have the same features with an angular difference of 90°. The driving theory and the design method of pitch curves were presented, a case study of gears with involute tooth profile was illustrated, which shows the effectiveness of the new differential. 

提出了一种新型非圆行星齿轮差速器,将其应用于越野汽车分动器中,可以实现两输出轴扭矩变比例分配,相当于增大了差速器的锁紧系数,即增加了差速器的防滑功能,从而有望提高车辆的越野通过性。差速器结构紧凑,两个非圆中心齿轮形状完全相同,双联非圆行星齿轮形状一致,相位相差90°,采用三组双联行星齿轮实现均载,工艺性好。通过传动原理分析,给出了非圆齿轮节曲线的设计方法,并以渐开线齿形为例进行了设计计算及样机试制,差速器理论锁紧系数达到3.45。

非圆齿轮, 行星传动, 差速器, 越野汽车