CN216339796U

CN216339796U - Square drill rod and corresponding inner sleeve and outer sleeve

Info

Publication number: CN216339796U
Application number: CN202122694396.2U
Authority: CN
Inventors: 钱志远; 毕晓锋
Original assignee: Yantai Wangyuan Hydraulic Co ltd
Current assignee: Yantai Wangyuan Hydraulic Co ltd
Priority date: 2021-11-05
Filing date: 2021-11-05
Publication date: 2022-04-19
Anticipated expiration: 2031-11-05

Abstract

The utility model relates to mining equipment, in particular to a square drill rod and corresponding inner and outer sleeves, and the difference of the prior art is that the matching parts of the drill rod, the inner and outer sleeves have approximately square outlines; correspondingly, the inner bore of the inner sleeve part has a square bore with the same contour as the shank adapter part, and the inner bore of the outer sleeve has a square bore with the same contour as the shank adapter part. Compared with the prior art, the drill rod changes the structure of the traditional drill rod, the inner sleeve and the outer sleeve, and in the use process, because the inner sleeve and the outer sleeve are in the outer circle and the inner square, the contact area of the inner sleeve, the outer sleeve and the drill rod is increased, the deflection and the relative rotation of the drill rod are limited, the strain of a piston is reduced, and the failure rate of the breaking hammer is reduced.

Description

Square drill rod and corresponding inner sleeve and outer sleeve

Technical Field

The utility model relates to mining equipment, in particular to a square drill rod and a corresponding inner sleeve and an outer sleeve.

Background

The hydraulic breaking hammer drives a piston to reciprocate by taking a hydraulic pump as a power source, hydraulic oil as a medium and hydraulic oil static pressure as power, the piston impacts a drill rod at high speed during stroke, and the drill rod breaks ore, concrete and other solids. The device can more effectively clean floating stones and soil in rock gaps in the process of excavating a building foundation. However, the existing hydraulic breaking hammer still has some defects: the sliding fit part of the existing drill rod, the inner sleeve and the outer sleeve is in a standard cylindrical shape, but gaps are necessarily formed in the sliding fit, most of force transmitted by the drill rod is axial force during working, but radial force is often applied to a prying object, so that the drill rod bears torque, but the sliding fit part of the drill rod, the inner sleeve and the outer sleeve is in a standard cylindrical shape, so that resistance opposite to the torque cannot be generated, the drill rod, the inner sleeve and the outer sleeve are easy to rotate relatively, and the piston is easy to pull.

Disclosure of Invention

In order to overcome one of the prior technical defects, the utility model discloses a square drill rod and a corresponding inner sleeve and an outer sleeve, which comprise the drill rod, the inner sleeve and the outer sleeve, and different from the prior art, the matching parts of the drill rod, the inner sleeve and the outer sleeve have approximately square outlines; correspondingly, the inner bore of the inner sleeve part has a square bore with the same contour as the shank adapter part, and the inner bore of the outer sleeve has a square bore with the same contour as the shank adapter part.

Furthermore, the outline of the drill rod matching part comprises 4 straight edges and arc edges which are positioned between every two adjacent straight edges and are respectively connected with the straight edges, an inscribed circle of the 4 straight edges is coincided with a circumferential outer circle near the front of the drill rod matching part, and the 4 arc edges are a part of an outline circumscribed circle of the drill rod matching part.

Furthermore, the inner hole of the inner sleeve also comprises a round hole matched with the rear end part of the drill rod and a taper hole matched with the rear end face of the drill rod matching part.

Furthermore, the inner sleeve extends forwards and is combined with the outer sleeve into a whole, and a limit groove formed in the drill rod is omitted.

Compared with the prior art, the drill rod changes the structure of the traditional drill rod, the inner sleeve and the outer sleeve, and in the use process, because the inner sleeve and the outer sleeve are in the outer circle and the inner square, the contact area of the inner sleeve, the outer sleeve and the drill rod is increased, the deflection and the relative rotation of the drill rod are limited, the strain of a piston is reduced, and the failure rate of the breaking hammer is reduced.

Drawings

FIG. 1 is a schematic view of the construction of a drill rod according to the present invention.

FIG. 2 is a schematic view of the profile of the shank adapter of the present invention.

Fig. 3 is a schematic structural view of the inner sleeve of the present invention.

Figure 4 is a schematic view of the construction of the jacket of the present invention.

Fig. 5 is a schematic view of the present invention in a front cylinder.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. Embodiment 1, a square drill rod and corresponding inner sleeve and outer sleeve, including the drill rod 1, the inner sleeve 2, the outer sleeve 3, the drill rod and the inner sleeve and outer sleeve cooperation part 11 has approximately square outline; accordingly, the inner bore of the inner sleeve 2 has a square bore 23 having the same contour as the shank adapter 11, and the inner bore of the outer sleeve 3 has a square bore 23 having the same contour as the shank adapter 11. The profile of the drill rod matching part 11 comprises 4 straight edges 12 and arc edges 13 which are positioned between two adjacent straight edges and are respectively connected with the straight edges, an inscribed circle 5 of the 4 straight edges 12 is coincided with a circumferential outer circle near the front of the drill rod matching part 11, and the 4 arc edges 13 are part of an outer profile circumcircle 6 of the drill rod matching part 11. The inner hole of the inner sleeve 2 further comprises a round hole 21 matched with the rear end part 14 of the drill rod 1 and a taper hole 22 matched with the rear end face of the drill rod matching part 11.

The embodiment 1 is the same as the embodiment 1 except that the inner sleeve 2 extends forwards to be integrated with the outer sleeve 3, and the limiting groove 15 formed on the drill rod 1 is omitted.

The utility model changes the structure of the traditional drill rod, the inner sleeve and the outer sleeve, and in the using process, the front cylinder body 4 is connected with the inner sleeve 3 and the outer sleeve 3, and the drill rod is abutted with the inner sleeve and the outer sleeve. Because the inner sleeve and the outer sleeve are in the outer circle and the inner square, the contact area of the inner sleeve, the outer sleeve and the drill rod is increased, the deflection and the relative rotation of the drill rod are limited, the strain of the piston is reduced, and the failure rate of the breaking hammer is reduced.

The foregoing is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way; those skilled in the art can make many possible variations or modifications to the utility model using the methods and techniques disclosed above, or to modify equivalent embodiments without departing from the scope of the utility model. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention.

Claims

1. A square drill rod and corresponding inner sleeve and outer sleeve, including the drill rod (1), the inner sleeve (2), the outer sleeve (3), characterized by that, the drill rod and inner sleeve and cooperating department (11) of the outer sleeve have square outline; correspondingly, the inner bore of the inner sleeve (2) has a square bore (23) with the same contour as the shank adapter (11), and the inner bore of the outer sleeve (3) has a square bore (23) with the same contour as the shank adapter (11).

2. A square drill rod and corresponding inner and outer sleeves according to claim 1, characterised in that the profile of the shank engagement portion (11) comprises 4 straight edges (12), between and adjoining respectively two adjacent straight edges curved edges (13), the inscribed circle (5) of the 4 straight edges (12) coinciding with the circumferential outer circle near the front of the shank engagement portion (11), the 4 curved edges (13) being part of the profile circumcircle (6) of the shank engagement portion (11).

3. A square drill rod and corresponding inner and outer sleeves according to claim 1, characterised in that the inner bore of the inner sleeve (2) further comprises a round hole (21) cooperating with the rear end (14) of the drill rod (1) and a tapered hole (22) cooperating with the rear end face of the drill rod cooperating portion (11).

4. A square drill rod and corresponding inner and outer sleeves according to claim 1, characterised in that the inner sleeve (2) extends forwards to be integrated with the outer sleeve (3) and the limiting groove (15) formed in the drill rod (1) is omitted.