Development and Research of Intermittent Motion Planetary Mechanisms with Elliptical Gearwheels

Abstract

Actuators converting rotational motion of the input shaft into intermittent motion of the output one are widely used in mechanical engineering. However, in most of the actuators used, the conversion of motion is realized by breaking the kinematic chain. This leads to high loads on the actuator links due to shocks occurring at the beginning or end of the movement phase. An urgent task is the development of compact and reliable mechanical converters where the required motion is carried out smoothly and without breaking the kinematic chain. The article presents the new kinematic schemes of the intermittent motion mechanisms based on planetary gears with elliptical gearwheels. For ease of balancing it is proposed to use elliptical wheels with a rotation axis in the center of symmetry. The kinematic analysis of the developed mechanisms is carried out, the rotation angle and the analog of the output shaft angular velocity are determined. Mechanisms can be widely used in machine tools, robotics, automatic machines, and conveyors.