Wide-angle pitching and swinging down-the-hole drill

Abstract

The invention discloses a wide-angle pitching and swinging down-the-hole drill, which comprises a main arm and a connecting seat, wherein the main arm is hinged to an upper oil cylinder and a bending plate; a core bar of the upper oil cylinder, the bending plate and a connecting rod are hinged in a coaxial manner; the other end of the connecting rod is hinged to the middle part of a connecting base; the action of the upper oil cylinder is driven by pushing the connecting seat to pitch and rotate by the bending plate and the connecting rod; the front end of the connecting seat is provided with a convex plate, the convex plate is hinged to a swing seat in horizontal swing; a compensation bracket for installing a drill bit is connected with the swing seat; the side of the convex plate of the connecting seat is provided with a first wing plate; the swing seat is provided with a second wing plate which is on the same side of the first wing plate; the first wing plate is provided with a swing oil cylinder in a hinging manner; a core bar of the swing oil cylinder is hinged to the second wing plate; and the swing oil cylinder acts to drive the swing seat to horizontally swing. The pitch angle and the rotational speed of a down-the-hole drill are increased by the bending plate and the connecting rod; and the swing seat is capable of driving a crossbeam and the drill bit to swing over 180 degrees through parts such as the swing oil cylinder and the swing seat.

Description

technical field [0001] The invention relates to a large-angle pitching and swinging down-the-hole drilling machine. Background technique [0002] At present, down-the-hole drilling rigs are widely used in earthwork excavation and blasting projects such as mining, hydropower, and transportation. With the development of project scale and technology, new requirements are put forward for down-the-hole drilling rigs. The beam on which the drill bit is installed on the down-the-hole drilling rig needs to pitch and swing at a larger angle to meet the needs of various working conditions. Existing patent No.: 200920276092 discloses a down-the-hole drilling rig. The body is hinged with a main arm and a lower oil cylinder. The core rod of the lower oil cylinder is hinged with the main arm. The upper cylinder and the beam on which the drill bit is installed, the core rod of the upper cylinder is hinged to the beam, and the upper cylinder stretches to push the beam to pitch and rotate; ...

AI Technical Summary

Problems solved by technology

Due to the limited elongation of the upper oil cylinder in this structure, the pitch angle of the beam is small and the pitch rotation speed is slow; limited by the telescopic length of the swing cylinder, the swing angle of the main arm of the drilling rig is small; because the main arm drives the beam and the drill bit Horizontal swing, considering that the main arm and the girder are very long, and the space required for swing is large, so the down-the-hole drilling rig with the above structure is limited in space, and its scope of application is small

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