中间轴齿轮轴向力分析

An Analysis of Gears' Axial Force of Intermediate Shaft

通过对常见齿轮传动的受力分析,总结齿轮传动受力关键是轴向力。通过对两级展开式斜齿圆柱齿轮传动典型实例轴向力的分析,得出如下结论:中间轴两齿轮旋向一般应相同,以便其轴向力彼此抵消一部分。这将减轻轴承、轴、箱体的轴向载荷,延长其使用寿命;还将为同类齿轮的设计、安装提供参考;甚至可推广到含蜗杆-斜齿圆柱齿轮的多级传动。即使主动轮旋向或转向改变,此结论仍成立,但也有特例,如:中间轴含直齿锥齿轮或为主动轴。

Through an analysis of common gear drive force,we know that the key of gears＇ force is axial force. From the axial force analysis of two-stage expansion helical cylindrical gear the result is as follow： two gears＇ spiral direction of intermediate shaft is often the same so that its axial force could counteract partly each other. This will decrease the axial load of rolling bearings,shaft,and gearbox,and will prolong their service life. This will also give a reference for similar gears＇ design and installation. It is even applicable to multistage transmission including worm helical cylindrical gear transmission as well. The result is still correct even if spiral direction or rotate direction changes. But the exception exists as well,for example,the intermediate shaft contains spur bevel gear or it is input shaft.