Compliant Mount for Rack and Pinion Encoder
Original Publication Date: 1987-Jul-01
Included in the Prior Art Database: 2005-Feb-01
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.