动能共轭组合凸轮机构及其应用

Kinetic Energy Conjugate Combined Cams Mechanism and Its Application

当从动件的质量、速度和加速度都比较大,以至于克服惯性所需的峰值功率成为决定凸轮机构原动机功率指标的主要因素时,考虑到惯性功率具有正负交替周期变化的性质,提出了一种新的凸轮机构,即动能共轭组合凸轮机构。该机构由两片固结的凸轮和两个独立的从动件组成,当凸轮匀速转动时,两个从动件的动能之和为定值,使惯性功率之和保持为零,从而显著降低凸轮机构原动机的功率指标,提高了凸轮转速的平稳性。讨论了该机构不产生刚性和柔性冲击的条件,并给出了应用实例。

When the follower′s mass,velocity and acceleration are so large that the pick power to overcome inertia becomes the main factor for deciding the input power of the cam mechanism′ driving motor,considering the inertial power changes from positive to negative periodically,we present a new mechanism which is named as kinematic energy conjugate combined cams mechanism.The mechanism consists of two cams connected rigidly and two followers moving separately,such that when the cams are rotating evenly,the sum of the kinetic energy of the two followers is constant.In this way,the initial power of the mechanism keeps zero,so the power of the driving motor and the fluctuation of the shaft speed can be reduced significantly.Finally,we discussed the condition under which the infinite acceleration and jerk do not exist in the mechanism,and an application example is given.