推土机经多年使用后,最终传动半轴外端螺纹经常出现损坏现象,其原因主要如下:最终传动箱内的齿轮轴承磨损严重,游隙过大,造成链轮与半轴的垂直度降低,链轮运转过程中在径向力的作用下会产生一个轴向推力,这个推力通过链轮螺母、浮动油封、支座给轴头螺母施加一个向外的推力,久之导致轴头螺纹损坏。当轴头螺纹严重损坏后,轴头螺母向外退出,使链轮外侧的浮动油封间隙增 After many years of use of bulldozers, the final drive shaft outer end often damage the thread phenomenon, the main reasons are as follows: the final gearbox bearing wear and tear, excessive clearance, resulting in lower verticality of the sprocket and the semi-shaft, the chain During the operation of the wheel, radial thrust will generate an axial thrust. This thrust exerts an outward thrust force on the shaft nut through the sprocket nut, the floating oil seal, and the bearing, which will cause damage to the shaft thread for a long time. When the spindle thread is severely damaged, the spindle nut out to the outside, so that the floating seal floating outside the sprocket by