越野汽车双联非圆行星齿轮差速器的研究

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。

A Novel Noncircular Planetary Differential for Off-road Vehicles

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.