JOINT FOR CONNECTION OF PARTS Russian patent published in 1998 - IPC

FIELD: mechanical engineering; permanent joints of two parts with one-time introduction of projection of one part into cavity of other part, for example, in coupling the plunger of deep well pump lowered in well beforehand with sucker rod string used as connecting link between surface power drive and pumps plunger. SUBSTANCE: permanent joint is used for connection of parts with one-time one-sided penetration of projection of one part into cavity of other part; projection of one part includes section widening in wedge-shaped pattern from base to its end. Fingered bush with vanes is fitted on projection for limited motion; cavity of one part has widened portion relative to its inlet size. Volumetric configuration of end of vanes of fingered bush is identical to volumetric configuration of widened portion of section of cavity. Inner surface of vanes of fingered bush is mating relative to surface of wedge-shaped section of projection of other part when ends of vanes of fingered bush are located in widened section of cavity of first part. Outer surface of ends of vanes of fingered bush is provided with groove for forming cantilever sections on vane ends. EFFECT: enhanced reliability of joint at simplified construction. 3 dwg