本专利是关于以机床主轴轴承的预紧力作为回转速度的函数,从而改变预紧力使主轴稳定的主轴结构。以往,当主轴轴承是圆锥滚柱轴承时,一般采用在其外圈或内圈上用弹簧施加预紧力的方法,以防止因主轴热膨胀而产生串动。但是,因为机床的使用要求日益提高,所采用的转速和扭矩的范围都要求极宽。所以象通常那样以弹簧施加预紧力的做法,就与 This patent is about the main spindle bearing preload as a function of speed, thereby changing the pre-stress to make the spindle stable spindle structure. In the past, when the spindle bearing is a tapered roller bearing, a method of applying a preload force by a spring on its outer ring or inner ring is generally adopted to prevent stringing caused by thermal expansion of the main shaft. However, due to the ever-increasing use of machine tools, the range of speeds and torques used are extremely demanding. Therefore, as usual, the use of pre-tightening force spring approach, with