CN216588445U - Square drill rod assembly - Google Patents
Square drill rod assembly Download PDFInfo
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- CN216588445U CN216588445U CN202122693707.3U CN202122693707U CN216588445U CN 216588445 U CN216588445 U CN 216588445U CN 202122693707 U CN202122693707 U CN 202122693707U CN 216588445 U CN216588445 U CN 216588445U
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- drill rod
- square
- sleeve
- outer sleeve
- inner sleeve
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Abstract
The utility model relates to mining equipment, in particular to a square drill rod assembly, which is different from the prior art that the matching part of a drill rod and an inner sleeve and an outer sleeve has a roughly square outline; accordingly, the inner bore of the inner sleeve portion has a square hole having the same profile as the shank fitting portion and a profile similar to the profile of the shank fitting portion, the inner bore of the outer sleeve has a square hole having the same profile as the shank fitting portion and a profile similar to the profile of the shank fitting portion, and the front cylinder block has an inner sleeve square hole and an outer sleeve square hole corresponding to the inner sleeve profile and the outer sleeve profile, respectively. Compared with the prior art, the utility model changes the structures of the traditional drill rod, the inner sleeve, the outer sleeve and the front cylinder body, and in the use process, because the front cylinder body is in the outer circle and the inner square, the inner sleeve and the outer sleeve are in the inner and outer mean square, and the matching part of the drill rod is in the outer square, the contact area between the inner sleeve and the outer sleeve is increased, the deflection and the relative rotation of the drill rod, the inner sleeve and the outer sleeve are limited, the strain of a piston is reduced, and the failure rate of the breaking hammer is reduced.
Description
Technical Field
The utility model relates to mining equipment, in particular to a square drill rod assembly.
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 or shortcomings, the utility model discloses a square drill rod assembly, which comprises a drill rod, an inner sleeve and an outer sleeve, wherein the difference from the prior art is that the matching parts of the drill rod, the inner sleeve and the outer sleeve have approximately square outlines; accordingly, the inner bore of the inner sleeve portion has a square hole having the same profile as the shank fitting portion and a profile similar to the profile of the shank fitting portion, the inner bore of the outer sleeve has a square hole having the same profile as the shank fitting portion and a profile similar to the profile of the shank fitting portion, and the front cylinder block has an inner sleeve square hole and an outer sleeve square hole corresponding to the inner sleeve profile and the outer sleeve profile, respectively.
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 utility model changes the structures of the traditional drill rod, the inner sleeve, the outer sleeve and the front cylinder body, and in the use process, because the front cylinder body is in the outer circle and the inner square, the inner sleeve and the outer sleeve are in the inner and outer mean square, and the matching part of the drill rod is in the outer square, the contact area between the inner sleeve and the outer sleeve is increased, the deflection and the relative rotation of the drill rod, the inner sleeve and the outer sleeve 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 structural view of the front cylinder of the present invention.
Fig. 6 is a schematic structural diagram of the present invention.
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.
The embodiment 2 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 traditional drill rod, inner sleeve, outer sleeve and front cylinder, and in the using process, because the front cylinder is outer circle and inner square, the inner sleeve and outer sleeve are inner and outer mean square, the matching part of the drill rod is outer, the contact area between them is increased, the deflection and relative rotation of the drill rod, inner sleeve and outer sleeve are limited, the pull damage of 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 (4)
1. A square drill rod assembly comprises a drill rod (1), an inner sleeve (2), an outer sleeve (3) and a front cylinder body (4), and is characterized in that a matching part (11) of the drill rod, the inner sleeve and the outer sleeve has a roughly square outline; correspondingly, the inner bore of the inner sleeve (2) is provided with a square hole (23) with the same outline as the drill rod matching part (11) and an outline similar to the outline of the drill rod matching part (11), the inner bore of the outer sleeve (3) is provided with a square hole (23) with the same outline as the drill rod matching part (11) and an outline similar to the outline of the drill rod matching part (11), and the front cylinder body is provided with an inner sleeve square hole (41) and an outer sleeve square hole (42) which correspond to the outlines of the inner sleeve (2) and the outer sleeve (3) respectively.
2. A square drill rod assembly according to claim 1, characterized in that the profile of the shank engagement portion (11) comprises 4 straight edges (12), between and adjoining to adjacent straight edges arc 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 arc edges (13) being part of the circumscribed circle (6) of the profile of the shank engagement portion (11).
3. A square drill rod assembly according to claim 1, characterized in that the inner bore of the inner sleeve (2) further comprises a round hole (21) for cooperation with the rear end (14) of the drill rod (1), and a tapered hole (22) for cooperation with the rear end face of the shank engagement portion (11).
4. A square drill rod assembly according to claim 1, characterised in that the inner sleeve (2) extends forwardly to be integral with the outer sleeve (3) and the spacing groove (15) provided in the drill rod (1) is omitted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122693707.3U CN216588445U (en) | 2021-11-05 | 2021-11-05 | Square drill rod assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122693707.3U CN216588445U (en) | 2021-11-05 | 2021-11-05 | Square drill rod assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216588445U true CN216588445U (en) | 2022-05-24 |
Family
ID=81642066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122693707.3U Active CN216588445U (en) | 2021-11-05 | 2021-11-05 | Square drill rod assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216588445U (en) |
-
2021
- 2021-11-05 CN CN202122693707.3U patent/CN216588445U/en active Active
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