Four-Position Robot Actuator
Original Publication Date: 1986-Aug-01
Included in the Prior Art Database: 2005-Mar-09
A pair of pneumatic cylinders is employed to enable a robot to hold a part in any of four radial positions through positioning the cylinders at an angle to each other and activating only one cylinder at any time in a selected order for either full retraction or full extension of the cylinder's piston rod to position the part in each of the four positions. A positioning device 1 includes a pair of pneumatic cylinders 2 and 3 disposed at 90 degrees to each other. Each of the cylinders 2 and 3 is connected to a crankshaft 4. The cylinder 2 is connected to the crankshaft 4 through its piston rod 5, a connector 6, and a pin 7, which is carried by a portion 8 of the crankshaft 4. The cylinder 3 is connected through its piston rod 9 and a connector 10 to the pin 7.