Telescopic suspension type fixed cylinder barrel

Abstract

The invention belongs to the technical field of coal mine mechanical equipment, and discloses a telescopic suspension type fixed cylinder barrel. The telescopic suspension type fixed cylinder barrel comprises a bottom lifting jack, a fixed cylinder barrel and a hydraulic support, the bottom lifting jack comprises a piston rod, the piston rod is provided with a first pin hole, the fixed cylinder barrel is connected to the outer side of the bottom lifting jack in a sleeving mode, and the fixed cylinder barrel is provided with a second pin hole; and a pin shaft penetrates through the second pin hole and the first pin hole at the same time, the top of the piston rod is connected with a protective upper cover through a screw, the lower end of the protective upper cover abuts against the upper end of the fixed cylinder barrel, three limiting plates are evenly connected to the outer side of the fixed cylinder barrel, and the outer walls of the limiting plates are fixedly welded to the hydraulic support. According to the telescopic suspension type fixed cylinder barrel, the problems that a wear-resisting sleeve of the bottom lifting jack is separated from a limiting groove and a chromium coating or a guide sleeve of the piston rod is damaged by coal gangue due to the influence of float coal or geological conditions below a hydraulic support base in the prior art are solved, and the telescopic suspension type fixed cylinder barrel is suitable for coal mining in a coal mine.

Description

technical field [0001] The invention relates to the technical field of coal mine machinery equipment, in particular to a retractable suspension fixed cylinder. Background technique [0002] Coal mines need to use hydraulic supports in the process of mining coal. Hydraulic supports use hydraulic pressure as power to realize movements such as lifting and moving forward to support the roof. Bottom lifting jack is the key component to complete various movements and bear the roof pressure when the hydraulic support is working. Its quality directly affects the reliability of the hydraulic support, which in turn affects the safety and normal production of the coal mine. The piston rod of the ordinary lifting jack is connected with the top frame through the hinge pin, and the wear-resistant sleeve at the bottom of the lifting jack is fastened to the outer cylinder with bolts, and the limit blocks on both sides of the wear-resistant sleeve move up and down in the slideway of the limi...

AI Technical Summary

Problems solved by technology

[0003] The present invention intends to provide a retractable suspension fixed cylinder to solve the problem of floating coal under the base of the hydraulic support in the prior art or the impact of geological conditions, which causes the wear-resistant sleeve of the lifting jack to fall out of the limit groove and the coal gangue to damage the lifting bottom Problems with the chrome plating of the piston rod or the guide sleeve of the jack

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