Sectional hydraulic pin puller

Abstract

A sectional hydraulic pin puller belongs to an auxiliary tool for mine support equipment, and consists of an inner cylinder body, an outer cylinder body and hydraulic cavities, a wedging mechanism and a pin pulling mechanism arranged on the cylinder bodies. A pin shaft is pulled and detached through a clamping force and a pin pulling force generated by a secondary oil cylinder formed by the hydraulic cavities in the cylinder bodies, and the stroke of the oil cylinder does not need to be over long; and when the object pin shaft is long, the pin puller can intermittently pull the pins section by section, namely when the oil cylinder of the pin puller reaches the maximum stroke, the outer cylinder body of the pin puller is reset, and the clamping force and the pin pulling force are reloaded. Compared with the prior art, the sectional hydraulic pin puller has the advantages of more reasonable structure, use convenience, safety and reliability, can reduce the labor intensity and remarkably improve the dismounting efficiency, and is particularly suitable for dismounting and mounting the pin shafts with large diameter and large hinge joint force at the connection parts of a connecting rod, a base, a shield beam, a top beam and the like in a mine hydraulic support.

Description

technical field [0001] The invention relates to an auxiliary tool for support equipment of a coal mining face in a mine, in particular to a pin puller for disassembling a hinged pin shaft on a hydraulic support. Background technique [0002] In the three machines and one frame of mine machinery, the number of hydraulic supports is large and the tonnage is heavy. Therefore, the connecting rods, bases, cover beams, roof beams and other connecting parts of the hydraulic supports are hinged with larger pins. There are at least five pin shafts with larger sizes in the mining height cover hydraulic support, and the maximum diameter can reach 150mm, length 570mm. Due to the large frame type of the hydraulic support, it is necessary to disassemble and assemble the various components during the process of transporting the support to the working face or performing maintenance. It takes a lot of force to pull it out. In the prior art, in order to solve this problem, operators often...

AI Technical Summary

Problems solved by technology

In the prior art, in order to solve this problem, operators often use the following methods to disassemble the pin shaft: one method is to install high-strength bolts on one end of the pin shaft, and then manually use hammering to disassemble it. The method has high labor intensity, low efficiency and is very unsafe, and it is easy to damage parts

The other is to use a hydraulic jack for disassembly, but because it is not a special disassembly tool for the pin shaft, using a jack to remove the pin shaft is not only cumbersome in mechanism, but also has a large stroke of the piston rod and small force, which is inconvenient to connect with the pin shaft, resulting in The extraction efficiency is low, which prolongs the installation and layout of the hydraulic support and directly affects the work progress

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