Double-layer transmission pin shaft chain

Abstract

The invention discloses a double-layer transmission pin shaft chain, consisting of plural pin shaft chain units connected in sequence, wherein each pin shaft chain unit consists of an internal chain joint and an external chain joint; the internal chain joint and the external chain joint are inserted with a bearing in coordination way to form a hinging chain via a pin shaft and a shaft sleeve; each external chain and each internal chain can do circular motion around the pin shaft, wherein the pin shaft consists of an external sleeve and an internal pin shaft and forms internal and external interference sleeve structure by the hot sleeve processing technology; the double-layer combination structure can exert the anti-fatigue characteristics and toughness of the internal and external different materials and prevent the integral rupture invalidation of the pin shaft chain caused by the radial extension of the shaft face crackle in the using process; the invention has simple structure, easy manufacture, high reliability and long using life; by adopting the double-layer pin shaft chain system of the invention, the service life and the production and maintenance cost of equipment can be reduced, and the running safety can be guaranteed.

Description

technical field [0001] The invention belongs to the field of chain conveying and lifting machinery, and in particular relates to a heavy-duty transmission chain structure for lifting, conveying and unloading mechanical equipment of various materials. Background technique [0002] In the prior art, the main transmission element of the chain conveying equipment is the pin chain, and the main failure mode of the pin chain is the fracture of the pin chain. The failure time limit of conventional design is generally 10 years; after carburizing and shot peening surface strengthening treatment, its fatigue life is generally not increased by more than 15%; due to the service conditions of dust and high temperature environment, it is also subjected to shear, bending and other stresses, forming Fatigue cracks expand and eventually cause the pin shaft to break, which greatly shortens the product life, sometimes only half a year; the failure of the pin shaft chain cannot be predicted in ...

AI Technical Summary

Problems solved by technology

The failure time limit of conventional design is generally 10 years; after carburizing and shot peening surface strengthening treatment, its fatigue life is generally not increased by more than 15%; due to the service conditions of dust and high temperature environment, it is also subjected to shear, bending and other stresses, forming Fatigue cracks expand and eventually cause the pin shaft to break, which greatly shortens the product life, sometimes only half a year; the failure of the pin shaft chain cannot be predicted in advance, not only causing production stagnation, but also causing overall equipment damage, and maintenance work is time-consuming and laborious , seriously affecting normal production

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