Browse Prior Art Database

Compliant Mount for Rack and Pinion Encoder

IP.com Disclosure Number: IPCOM000039701D
Original Publication Date: 1987-Jul-01
Included in the Prior Art Database: 2005-Feb-01
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Arnold, RG: AUTHOR [+3]

Abstract

A mount for a distance encoder utilizing a pinion running on a rack uses a second, follower pinion and a separate eccentric adjustment to position the encoder pinion a very small distance out of mesh with the rack. When a variation in the inclination of the rack is encountered, the whole mount pivots about the eccentric adjustment so that the encoder pinion remains a small distance out of mesh with the rack. This reduces wear on the encoder pinion (since the engagement force with the rack is low) and reduces the side load on the encoder bearings to increase their useful life. A trolley 10 runs along rails on either side of a rack 11. The trolley carries an encoder plate 12, pivotally mounted to the trolley at pivot 13. Shoulder screws 14 hold the plate to the trolley while allowing the plate to rotate around the pivot 13.

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 55% of the total text.

Page 1 of 2

Compliant Mount for Rack and Pinion Encoder

A mount for a distance encoder utilizing a pinion running on a rack uses a second, follower pinion and a separate eccentric adjustment to position the encoder pinion a very small distance out of mesh with the rack. When a variation in the inclination of the rack is encountered, the whole mount pivots about the eccentric adjustment so that the encoder pinion remains a small distance out of mesh with the rack. This reduces wear on the encoder pinion (since the engagement force with the rack is low) and reduces the side load on the encoder bearings to increase their useful life. A trolley 10 runs along rails on either side of a rack 11. The trolley carries an encoder plate 12, pivotally mounted to the trolley at pivot 13. Shoulder screws 14 hold the plate to the trolley while allowing the plate to rotate around the pivot 13. This pivot also incorporates an eccentric adjustment screw, allowing the plate to be moved away from or towards the rack. The plate carries two pinions, a follower pinion 15 fully enmeshed with the rack and an encoder pinion 17 slightly out of full mesh with the rack and mounted on the shaft of the encoder. The degree of engagement of the encoder pinion with the rack is variable by use of the eccentric adjustment screw. In order to ensure full meshing of the follower pinion with the rack, a spring 16 biases the encoder plate towards the rack. If the encoder pinion were fully in mesh with the rack, it w...