随着主轴转速的提高，齿轮换档机构中的滑移齿轮的线速度也大大提高，与之接触的铜质拨叉表面磨损也愈加严重，既损耗功率，也影响温升。尤其在立式机床中，由于滑移齿轮是多联齿轮、重量大，磨损也就严重。故有必要对传统的拨叉机构进行改进新机构的设计思路是：在拨又与齿轮 With the increase of the spindle speed, the linear speed of the slip gear in the gear shifting mechanism is also greatly increased, and the contact surface of the copper fork is also aggravated, which not only consumes power but also affects the temperature rise. Especially in the vertical machine tool, because the slip gear is a multi-link gear, heavy weight, wear will be serious. Therefore, it is necessary to improve the traditional fork mechanism. The new design idea is: