Browse Prior Art Database

Self-Monitoring Robotic Screwdriving System

IP.com Disclosure Number: IPCOM000038828D
Original Publication Date: 1987-Mar-01
Included in the Prior Art Database: 2005-Feb-01
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Bandy, RL: AUTHOR [+3]

Abstract

A self-monitoring screwdriver system automatically installs a screw and verifies that the screw is properly installed. A self-monitoring screwdriver system includes an electric motor 1 connected through a flexible coupling 2 to a drive gear 3. The drive gear 3 drives a cylindrically shaped idler gear 4 which continuously powers a driven gear 5 secured to a hollow axle 6 for vertical movement therewith. A housing 7 rotatably supports the gears 4 and 5 and the hollow axle 6. An adapter clamp 8, which is fixed to the housing 7, supports the motor 1, the coupling 2, and the drive gear 3. The hollow axle 6 transmits power from the motor 1 to a DePrag clutch 9 which moves vertically with the hollow axle 6. The clutch 9 has a screwdriver bit 10 connected thereto.

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

Self-Monitoring Robotic Screwdriving System

A self-monitoring screwdriver system automatically installs a screw and verifies that the screw is properly installed. A self-monitoring screwdriver system includes an electric motor 1 connected through a flexible coupling 2 to a drive gear 3. The drive gear 3 drives a cylindrically shaped idler gear 4 which continuously powers a driven gear 5 secured to a hollow axle 6 for vertical movement therewith. A housing 7 rotatably supports the gears 4 and 5 and the hollow axle 6. An adapter clamp 8, which is fixed to the housing 7, supports the motor 1, the coupling 2, and the drive gear 3. The hollow axle 6 transmits power from the motor 1 to a DePrag clutch 9 which moves vertically with the hollow axle 6. The clutch 9 has a screwdriver bit 10 connected thereto. When the end of the housing 7 is placed against a part 11 having a screw 12 therein, pressurized air is applied through a hose 13 to act on a piston 14, which is secured to the hollow axle 6. Thus, the screwdriver bit 10 is pushed upwardly against the force of the pressurized air when the screwdriver bit 10 engages the screw 12. This upward movement of the screwdriver bit 10 is transmitted to an interposer 15, which engages a movable finger 16 of a linear displacement measuring device 17. The linear displacement measuring device 17 is attached to the adapter clamp 8. The amount of displacement of the movable finger 16 indicates the amount that the head of the specific screw 12 extends beyond the part 11. This is the position in which the screw 12 should finally be positioned when the scr...