Intermediate arm structure of engineering drilling machine

Abstract

An intermediate arm structure of an engineering drilling machine comprises an opening groove shaped intermediate arm body which is formed by integrally bending a board, wherein a plurality of rib plates are arranged in an opening groove of the intermediate arm body; the two sides of the rib plates and a groove wall of the intermediate arm body are welded to form a truss structure; a hinging hole is formed in the middle part of the intermediate arm body; a hinging sleeve is mounted in the hinging hole and is integrally welded to the intermediate arm body; a reinforcing sleeve covers the outer surface of the intermediate arm body and is in a shape of an opening groove by bending a metal board; the reinforcing sleeve and the intermediate arm body are welded as a whole; a front end mounting seat is arranged at the front end of the intermediate arm body; and a rear end mounting seat is arranged at the rear end of the intermediate arm body. The structure has the beneficial effects that the reinforcing sleeve covers the surface of the intermediate arm body and is connected to the intermediate arm body and the hinging sleeve, thus the connection strength between the intermediate arm body and a main arm hinging seat is increased while the supporting capacity of a main body of the intermediate arm body is improved, and thus high supporting force is supplied to the intermediate arm.

Description

technical field [0001] The invention relates to an engineering drilling rig accessory, in particular to an engineering drilling rig middle arm structure. Background technique [0002] At present, engineering drilling rigs such as down-the-hole drilling rigs and rock drills are widely used in earthwork excavation and blasting projects such as mining, hydropower, and transportation. With the development of engineering scale and technology, new requirements are put forward for engineering drilling rigs. The girder on which the drill bit is installed on the engineering drilling rig needs to pitch and swing at a larger angle to meet the needs of various working conditions. Existing patent No.: 201520084117.2 discloses a large-angle pitching and swinging engineering drilling rig. The compensation frame of the engineering drilling rig is made of a metal square tube in this case, so its quality is relatively heavy, and its The load-carrying capacity is weak during work, and after l...

AI Technical Summary

Problems solved by technology

Existing patent No.: 201520084117.2 discloses a large-angle pitching and swinging engineering drilling rig. The compensation frame of the engineering drilling rig is made of a metal square tube in this case, so its quality is relatively heavy, and its The load-bearing capacity is weak when working. After long-term use, the middle arm is prone to bending deformation, and even breakage in severe cases. Therefore, it is necessary to further improve it.

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