LIGHT-LOAD LINEAR RECIPROCATING MOTION DEVICE BASED ON SERVO MOTOR AND SMALL ECCENTRICITY CRANK MECHANISM

摘要

Here designs innovatively a kind of NC light-load straight reciprocating motion device which has relative fully technical function. It is driven by a low-power servo motor to actuate small eccentricity crank mechanism to rotate or swing. The rotation or swing drives piston to move linearly short distance. With the help of the simple and functional device, the internal-reflux area-differential hydraulic stroke amplifying device, the small linear displacement of the piston can be amplified dozens times or even more than one hundred times, so the output plunger can obtain relative large linear displacement to meet the required output force and motion. This device of hydrau-electromechanial integration has the following advantages: (1) easy to control the frequency of straight reciprocating motion by editing the program to control the rotating/swing frequency of the servo motor; (2) easy to get the needed stroke of the output plunger by editing program to control the oscillation angle of the servo motor; (3) higher precision in motion and displacement than pneumatic/hydraulic transmission device while the same good buffering as in pneumatic/hydraulic transmission device.