Novel welding type connecting screw pin

Abstract

The invention relates to a novel welding type connecting screw pin, and belongs to the technical field of coal mine machineries. The novel welding type connecting screw pin comprises a square head anda screw pin body which are integrally welded, wherein an opening hole is formed in the middle of the square head; an inserting section is arranged at a head part of the screw pin body; the square head and the screw pin body are in inserting fitting with the inserting section through the opening hole; and the opening hole is welded to the inserting section. The novel welding type connecting screwpin has the beneficial effects that the screw pin is divided into two parts including the screw pin body and the square head by structure optimizing; the square head is in inserting fitting with the screw pin body, and then plug welding is fully carried out, so that the connecting screw pin is manufactured; after the abovementioned structure is adopted, forging and pressing, and vertical milling links are decreased; the strength of a hinge pin is ensured; the use requirement is met; and moreover, the production efficiency is improved; and the manufacturing cost is decreased.

Description

technical field [0001] The invention relates to a novel welded connecting screw pin, which belongs to the technical field of coal mine machinery. Background technique [0002] The screw pin used on the connection head of the coal mine hydraulic support and the scraper machine connection device has a wide range of applications, a large amount of use, and is easily damaged. At present, the coal mine hydraulic support is connected to the transportation equipment scraper machine through a joint head. One end of the joint head is connected to the hydraulic support push rod through a vertical pin, and the other end is connected to the ear plate of the scraper machine through a horizontal screw pin. It is uneven. During the pushing and moving process of the hydraulic support, the connecting screw pin is subject to bending moment and torque at the same time, which is particularly easy to deform and break. It becomes a vulnerable stress-bearing part on the hydraulic support. It is fr...

AI Technical Summary

Problems solved by technology

At present, the coal mine hydraulic support is connected to the transportation equipment scraper machine through a joint head. One end of the joint head is connected to the hydraulic support push rod through a vertical pin, and the other end is connected to the ear plate of the scraper machine through a horizontal screw pin. Uneven, when the hydraulic support is pushed and moved, the connecting screw pin is subject to bending moment and torque at the same time, which is particularly easy to deform and break, and becomes a vulnerable stress-bearing part on the hydraulic support, which is frequently replaced and used in large quantities

The head of the existing screw pin is square. After blanking according to the maximum size, it needs to be processed by free forging, trolley, vertical milling, and tempering; if the screw pin is produced according to the conventional processing technology, the process is complicated and wastes materials. Long production cycle

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