Reciprocating drive mechanism with positive pinion-to-rack gear

Details Reciprocating drive mechanism with positive pinion-to-rack gear Reciprocating drive mechanism with positive pinion-to-rack gear

1985-02-25

1987-01-27

Staab, Lawrence

Machine element or mechanism

Mechanical movements

Rotary to or from reciprocating or oscillating

74 71, F16H 2116, F16H 1908

Patent

active

046386769

ABSTRACT:
A reciprocating drive mechanism powered by a rotating prime mover for use, for example, in operating oil well pumps. The drive mechanism utilizes a rotating pinion meshing with an endless arcuate rack gear to convert rotation to reciprocation and includes an assembly to provide a positive engagement between the pinion and rack gear. The prime mover is coupled to a fixed input shaft, the input shaft has the pinion coupled thereto, and an endless arcuate rack gear is rigidly coupled to an output shaft and meshes with the pinion. An arcuate cam is rigidly coupled to the arcuate rack gear and is engaged by a pair of cam followers which are also coupled to the pinion. A transmission shaft, which supports the pinion and cam followers, is parallel to and located a fixed distance from the input shaft, thereby maintaining the cam followers in positive engagement with the cam and the pinion in positive engagement with the rack gear.

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