High-torsion-resistance transmission structure of jar knocker

Abstract

The utility model relates to the technical field of petroleum machinery, in particular to a jar high-torsion-resistance transmission structure which comprises a mandrel, a transmission structure is arranged on the outer arc surface of the mandrel, the transmission structure comprises outer teeth, the outer teeth are fixedly connected to the outer arc surface of the mandrel in a circumferential array shape, a spline body is arranged on the outer arc surface of the mandrel, and the spline body is fixedly connected with the mandrel. The inner teeth are fixedly connected to the inner arc surface of the spline body in a circumferential array shape, the outer teeth are meshed with the inner teeth, and a first limiting hole is formed in the outer arc surface of the mandrel. According to the internal and external splines, involute tooth transmission is adopted, the number of teeth is increased, meanwhile, due to the particularity of the tooth shape, stress is more uniform compared with other structures, and the service life of the internal and external splines is prolonged. The defects that the structure is fast in abrasion and short in service life can be overcome, the transmission efficiency is improved, the matching precision is improved, the torsional strength of the jar is improved, impact in the torque transmission process is reduced, the assembly difficulty is reduced, the service life of a product is prolonged, and a large amount of use cost is saved.

Images