公开(公告)号：DE3167776D1

公开(公告)日：1985-01-31

申请号：DE3167776

申请日：1981-03-06

Applicant: IBM

Inventor： DENNY CLIFFORD MILLER ,  WAMPLER II CHARLES WELDON

IPC: F16H25/24 ,  B41J19/20 ,  B41J23/00

Abstract: Drive apparatus especially useful for controllably displacing the carrier of a printer, the drive apparatus including a lead screw (25) having laterally spaced apart and floating threaded followers (35, 36) thereon. Intermediate the threaded followers (35, 36) are a first pair of preloaded springs (50) which press the followers (35, 36) against the opposite flanks of the threads on the lead screw (25) to thereby inhibit backlash intermediate the followers (35, 36). A second pair of springs (70) are mounted intermediate a bracket (30), which is fastened to the carrier, and at least one of the followers for effecting coupling between the carrier and the follower while controlling backlash therebetween. A pair of arms (37a, 38a) extend from the followers (35, 36) and are coupled to a restraining shaft (100) in such a manner as to inhibit rotational movement of the arms (37, 38) (and thus the followers) while permitting motion of the followers in the direction parallel and perpendicular to the lead screw (25) to accommodate runnout or eccentricity.