Patent ID: 9732772
Date: 2017-08-15
CPC Classifications: F15B,G01M

Claim:
1. A hybrid servo actuator for a test crash as a stroke driving actuator, comprising: an operating part configured to include a piston which is provided to move in a hollow formed in a stroke direction inside a body and a rod which is connected to the piston to protrude in one direction of the body; a chamber configured to be formed at the other side of the body and supply an air pressure to the operating part; a controller configured to be formed at one side of the body to enclose the hollow and control a movement of the operating part; and wherein the piston is an aero dynamic bearing and the aero dynamic bearing includes: a bearing body configured to include a bearing hollow formed to enclose the rod; a plurality of air grooves configured to be formed on an outer circumferential surface of the bearing body in a circumferential direction; a plurality of air holes configured to be formed on one side of the bearing body; and a guide pipe configured to guide the air pressure introduced into the air holes to the air grooves.