Connecting structure for screw shaft

Abstract

A connecting structure for a screw shaft comprises a screw shaft section A and a screw shaft section B; a connecting device is arranged between the screw shaft section A and the screw shaft section Band comprises an inner hexagonal coupling arranged at one end of the screw shaft section A and an outer hexagonal coupling arranged at one end of the screw shaft section B; the inner hexagonal coupling is matched with the outer hexagonal coupling; a positioning sliding key is arranged inside the inner hexagonal coupling or outside the outer hexagonal coupling; a positioning sliding groove is correspondingly formed outside the outer hexagonal coupling or inside the inner hexagonal coupling; the positioning sliding key is matched with the positioning sliding groove; radial through holes are formed in positions where the outer hexagonal coupling and the inner hexagonal coupling are matched; a connecting pin is arranged in the through holes; and a fixing device is arranged on the connecting pin. The connecting structure has the beneficial effects as follows: 1, the new connecting manner is high in strength, shutdown for maintenance due to breakage of the joint of the screw shaft is avoided, the service life of the screw shaft is prolonged, the maintenance time is saved, and the productivity is increased; 2, by the aid of the new connecting manner, when the conveying torque is overloaded, the inner hexagonal coupling and the outer hexagonal coupling are broken firstly, the screw shaft is protected, and meanwhile, the fault of sticking of an original driving piece is avoided.

Description

technical field [0001] The invention provides a connection structure of a screw shaft, which belongs to the field of shield construction. Background technique [0002] The screw shafts of the existing screw machine are connected by welding. During the working process, due to the excessive vibration, the joint of the weld seam is not firm, and at the same time, it is accompanied by the defect of cold shrinkage after welding, which makes the joint of the screw shaft very easy to break. High cost and waste of resources. There is also a connection between the screw shafts through a ball joint, such as a connection structure disclosed by the Chinese Patent Office, CN204647038U, which discloses that two shaft sections are connected by a ball joint and a ball joint socket, and the two parts of the socket are mainly connected by a connector , the tensile force and shear force between the two are borne by the connecting parts, such as the screws. The strength of the screws is genera...

AI Technical Summary

Problems solved by technology

[0003] The present invention solves the above technical problems and provides a connection structure of the screw shaft, which has high strength and avoids defects such as weak welding connection and cold shrinkage in the past, and when the torque is too large, the coupling will automatically break and play an overload role. Protective function, easy to disassemble, long service life

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