Browse Prior Art Database

Four-Position Robot Actuator

IP.com Disclosure Number: IPCOM000061476D
Original Publication Date: 1986-Aug-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 2 page(s) / 40K

Publishing Venue

IBM

Related People

Brown, TD: AUTHOR

Abstract

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.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 52% of the total text.

Page 1 of 2

Four-Position Robot Actuator

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. The device 1 is clamped to an arm (not shown) of a robot through a mounting support 11. Each end of the crankshaft 4 has an arm 12 attached thereto. Each of the arms 12 (one shown) has a finger support 13 (one shown) at its end on which is supported a pair of fingers 14 movable towards each other for grasping the part. Thus, the pairs of the fingers 14 at the opposite ends of the crankshaft 4 grasp the part therebetween. When the cylinder 3 has its piston 15 moved to the bottom of the cylinder 3 by supplying pressurized air through its top, the arms 12 are in the position shown. No pressure is supplied to either side of a piston 16 of the cylinder 2 at this time. When the cylinder 2 has the piston 16 moved to its bottom so that the piston rod 5 is fully extended through applying air pressure to the top of the cylinder 2, the crankshaft 4 is rotated counterclockwise 90 degrees so that the arms 12 are in a downward vertical position. No air pressure is supplied to either side of the piston 15 of the cylinder 3 at this time. To rotate the...