CN216130881U

CN216130881U - Drill rod connecting structure and down-the-hole drill

Info

Publication number: CN216130881U
Application number: CN202122467626.1U
Authority: CN
Inventors: 苏明明; 陆昌杰; 吴桥鸿; 何金星; 张洪涛
Original assignee: Zoomlion Heavy Industry Science and Technology Co Ltd
Current assignee: Zoomlion Heavy Industry Science and Technology Co Ltd
Priority date: 2021-10-13
Filing date: 2021-10-13
Publication date: 2022-03-25
Anticipated expiration: 2031-10-13

Abstract

The utility model provides a drill rod connecting structure which comprises a power head output shaft, a connector body and an expansion sleeve, wherein one end of the power head output shaft is fixedly connected with one end of the connector body, an extending part is arranged at one end, close to the power head output shaft, of the connector body, the expansion sleeve is sleeved outside the power head output shaft, the expansion sleeve comprises a sleeve connection part, the expansion sleeve is further fixedly connected to the connector body, a gap is formed between the inner wall of the extending part and the outer wall of the power head output shaft, and at least part of the sleeve connection part is inserted into the gap. The utility model also provides a down-the-hole drill. According to the drill rod connecting structure and the down-the-hole drill, the expansion sleeve is additionally arranged between the power head output shaft and the joint body, so that the connection between the power head output shaft and the joint body is stabilized, and the relative rotation between the power head output shaft and the joint body can be avoided when the drill rod is disassembled, so that the problem that the drill rod and the joint body are disassembled together when the drill rod is disassembled is solved.

Description

Drill rod connecting structure and down-the-hole drill

Technical Field

The utility model relates to the technical field of drilling machines, in particular to a drill rod connecting structure and a down-the-hole drilling machine.

Background

At present, a down-the-hole drill is hole forming equipment applied to mine, municipal engineering and other projects, and the down-the-hole drill can drill holes in medium-hard or medium-hard rocks and realize rock drilling and hole forming through impact, rotation, propulsion, slag discharge and other parts. Because the down-the-hole drill needs to use a drill rod connecting structure to connect the power head output shaft and the drill rod, and the two ends of the joint body in the drill rod connecting structure are both generally connected with the power head output shaft and the drill rod through the taper threaded holes, when the drill rod is replaced, the drill rod and the joint body are easily detached together, then the drill rod and the joint body need to be separated, after the drill rod is replaced, the joint body needs to be installed again, the steps are complex, and the working efficiency is reduced; and frequently dismouting unit head output shaft damages the unit head output shaft with connecting the body easily, leads to the unit head output shaft to need to be changed, and the dismouting of unit head output shaft is very loaded down with trivial details again, can further reduce work efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a drill rod connecting structure and a down-the-hole drill, which can avoid the problem that a drill rod and a joint body are detached together when the drill rod is detached.

The utility model provides a drill rod connecting structure which comprises a power head output shaft, a connector body and an expansion sleeve, wherein one end of the power head output shaft is fixedly connected with one end of the connector body, an extending part is arranged at one end, close to the power head output shaft, of the connector body, the expansion sleeve is sleeved outside the power head output shaft, the expansion sleeve comprises a sleeve connection part, the expansion sleeve is further fixedly connected to the connector body, a gap is formed between the inner wall of the extending part and the outer wall of the power head output shaft, and at least part of the sleeve connection part is inserted into the gap.

In one embodiment, the socket part has a fracture, and the fracture divides the socket part into at least two expansion parts.

In one embodiment, the expansion part is wedge-shaped, and the size of the expansion part close to one end of the joint body is smaller than the size of the expansion part far away from one end of the joint body.

In one embodiment, the wall thickness of the expansion portion near the end of the joint body is smaller than the wall thickness of the expansion portion far from the end of the joint body.

In one embodiment, the outer side surface of the sleeve part is conical.

In one embodiment, the expansion sleeve further comprises a chassis, the joint body further comprises a connecting portion, a first fixing hole is formed in the chassis, a second fixing hole is formed in the connecting portion, the first fixing hole and the second fixing hole are correspondingly arranged, and a fastener fixedly connects the joint body and the expansion sleeve through the first fixing hole and the second fixing hole.

In one embodiment, the fastener includes a bolt and a nut, the bolt passes through the first fixing hole and the second fixing hole, and the nut is in threaded connection with the bolt; the chassis is arranged at one end of the expansion sleeve, and the connecting part is arranged at one end of the extending part.

In one embodiment, a first taper threaded hole is formed in one end of the joint body, and the power head output shaft is matched with the first taper threaded hole so as to be fixedly connected with the joint body.

In one embodiment, the drill rod connecting structure further comprises a drill rod, the other end of the joint body is provided with a second taper threaded hole, and one end of the drill rod is matched with the second taper threaded hole so as to be fixedly connected with the other end of the joint body.

The utility model also provides a down-the-hole drill which comprises the drill rod connecting structure.

According to the drill rod connecting structure and the down-the-hole drill, the expansion sleeve is additionally arranged between the power head output shaft and the joint body, so that the connection between the power head output shaft and the joint body is stabilized, and the relative rotation between the power head output shaft and the joint body can be avoided when the drill rod is disassembled, so that the problem that the drill rod and the joint body are disassembled together when the drill rod is disassembled is solved.

Drawings

In order to illustrate embodiments of the present invention or solutions in the prior art more clearly, the drawings needed for the description of the embodiments or solutions in the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained by those skilled in the art without inventive effort.

Fig. 1 is a sectional view of a drill pipe coupling structure according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of an expansion sleeve of the drill rod connecting structure shown in fig. 1.

Fig. 3 is a partially enlarged schematic view of a portion a of fig. 1.

Detailed Description

The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of preferred embodiments, which is to be read in connection with the accompanying drawings. While the present invention has been described in connection with the preferred embodiments, it is to be understood that the utility model is not limited to the disclosed embodiments, but is intended to cover various modifications, equivalent arrangements, and specific embodiments thereof.

In this document, the terms "first," "second," "third," "fourth," "fifth," and the like (if any) are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

In this document, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", and the like (if any) are used in the description to describe the positions of structures in the drawings and the positions of the structures relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the present application.

As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including not only those elements listed, but also other elements not expressly listed.

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects of the display device and the color display method according to the present invention will be given with reference to the accompanying drawings and preferred embodiments.

The utility model provides a drill rod connecting structure, and fig. 1 is a sectional view of the drill rod connecting structure according to an embodiment of the utility model. Referring to fig. 1, the drill rod connecting structure of the present embodiment includes a power head output shaft 1, a connector body 2 and an expansion sleeve 3, wherein one end of the power head output shaft 1 is fixedly connected to one end of the connector body 2, an extension portion 21 is disposed at one end of the connector body 2 close to the power head output shaft 1, the expansion sleeve 3 is sleeved outside the power head output shaft 1, the expansion sleeve 3 includes a sleeve portion 31, the expansion sleeve 3 is further fixedly connected to the connector body 2, a gap 29 is formed between an inner wall of the extension portion 21 and an outer wall of the power head output shaft 1, and at least a part of the sleeve portion 31 is inserted into the gap 29.

Fig. 2 is a schematic structural view of an expansion sleeve of the drill rod connecting structure shown in fig. 1. Referring to fig. 2, in the present embodiment, the sleeve portion 31 has four fractures 311, and the fractures 311 divide the sleeve portion 31 into four expansion portions (not shown). It is understood that in other embodiments, the break 311 may be in other numbers, such as one or two. Fracture 311 on the tight portion that expands can narrow when receiving external force extrusion to make adjacent tight portion that expands be close to each other, with shrink socket joint portion 31, make socket joint portion 31 can press from both sides tight unit head output shaft 1.

In this embodiment, the expansion sleeve 3 further includes a chassis 32, the chassis 32 is disposed at one end of the expansion sleeve 3, and the chassis 32 is provided with a first fixing hole 322. Specifically, in the present embodiment, the first fixing holes 322 are plural.

Fig. 3 is a partially enlarged schematic view of a portion a of fig. 1. Referring to fig. 2 and 3, in the embodiment, the joint body 2 further includes a connecting portion 22, the connecting portion 22 is disposed at one end of the extending portion 21, a second fixing hole (not shown) is formed on the connecting portion 22, the first fixing hole 322 and the second fixing hole are correspondingly disposed, and the fastening member fixedly connects the joint body 2 and the expansion sleeve 3 through the first fixing hole 322 and the second fixing hole. In this embodiment, the second fixing holes are also plural.

Specifically, in this embodiment, the fastener includes bolt 41 and nut 42, and bolt 41 passes first fixed orifices 322 and second fixed orifices, and nut 42 and bolt 41 threaded connection to will connect body 2 and the tight cover fixed connection that expands, like this, can avoid expanding to produce between tight cover 3 and the joint body 2 and rotate in the peripheral direction or axial displacement, guarantee that cup joint portion 31 can not drop from clearance 29. And the assembly and disassembly of the bolt 41 and the nut 42 are also easy. It is understood that in other embodiments, the fasteners may be other structures, such as pins.

In this embodiment, the portion of expanding is the wedge, and the size that the portion of expanding is close to 2 one ends of joint body is less than the size that the portion of expanding kept away from 2 one ends of joint body. Specifically, the wall thickness of the expansion portion near the end of the joint body 2 is smaller than the wall thickness of the expansion portion far from the end of the joint body 2. More specifically, the outer side surface of the socket 31 is tapered. Like this, tight portion expands inserts the clearance 29 between extension 21 and the unit head output shaft 1 after, and the portion of cup jointing 31 can tightly overlap outside unit head output shaft 1 on the one hand, and on the other hand can the chucking in the clearance 29 between extension 21 and unit head output shaft 1, thereby can make the connection between unit head output shaft 1 and the joint body 2 more firm and difficult pine takes off, and, the portion that cup jointing 31 inserted clearance 29 is more, the more tight that cup jointing 31 just blocked between clearance 29, unit head output shaft 1, the effort that connects between body 2 and the tight cover 3 that expands just is big, the static friction between the three is just also big more, unit head output shaft 1 just also is difficult pine takes off with the joint body.

In this embodiment, a first taper thread hole (not shown) is formed in one end of the joint body 2, and the power head output shaft 1 is matched with the first taper thread hole to be fixedly connected with the joint body 2.

Referring to fig. 1, in the present embodiment, the drill rod connection structure further includes a drill rod (not shown), the other end of the joint body 2 is provided with a second taper thread hole 25, and one end of the drill rod is matched with the second taper thread hole 25 to be fixedly connected with the other end of the joint body 2. Because the drilling rod is fixedly connected with the joint body 2 through the second taper threaded hole 25, when the drilling rod is disassembled, the expansion sleeve 3 not only can stabilize the connection between the power head output shaft 1 and the joint body 2, but also can avoid the relative rotation between the power head output shaft 1 and the joint body 2 when the drilling rod is disassembled.

This use novel drilling rod connection structure and down-the-hole drill who provides, through increase the tight cover 3 that expands between unit head output shaft 1 and joint body 2, stabilize unit head output shaft 1 and connect the connection between the body 2 to can avoid producing relative rotation between unit head output shaft 1 and the joint body 2 when dismantling the drilling rod, thereby avoid the problem together dismantled together with joint body 2 when dismantling the drilling rod.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. The utility model provides a drilling rod connection structure, its characterized in that includes unit head output shaft (1), connects body (2) and the tight cover of expanding (3), the one end of unit head output shaft (1) with the one end fixed connection who connects body (2), it is close to connect body (2) the one end of unit head output shaft (1) is equipped with extension (21), the tight cover of expanding (3) cover is located outside unit head output shaft (1), the tight cover of expanding (3) is including cup jointing portion (31), tight cover of expanding (3) still fixed connection in connect body (2), the inner wall of extension (21) with form clearance (29) between the outer wall of unit head output shaft (1), cup joint portion (31) at least the part inserts in clearance (29).

2. The drill rod connection structure as recited in claim 1, characterized in that the socket (31) has a break (311) thereon, and the break (311) divides the socket (31) into at least two expansion sections.

3. The pipe connection according to claim 2, wherein the expansion portion is wedge-shaped, and a dimension of the expansion portion near the end of the joint body (2) is smaller than a dimension of the expansion portion far from the end of the joint body (2).

4. The drill rod connection according to claim 3, characterized in that the wall thickness of the expansion portion at the end close to the joint body (2) is smaller than the wall thickness at the end remote from the joint body (2).

5. Drill rod connection according to claim 4, characterized in that the outer side of the socket (31) is conical.

6. The drill rod connecting structure as recited in claim 1, wherein the expansion sleeve (3) further comprises a chassis (32), the joint body (2) further comprises a connecting portion (22), a first fixing hole (322) is formed in the chassis (32), a second fixing hole is formed in the connecting portion (22), the first fixing hole (322) and the second fixing hole are correspondingly arranged, and a fastener fixedly connects the joint body (2) and the expansion sleeve (3) through the first fixing hole (322) and the second fixing hole.

7. The structure as claimed in claim 6, wherein the fastener comprises a bolt (41) and a nut (42), the bolt (41) passes through the first fixing hole (322) and the second fixing hole, and the nut (42) is threadedly coupled with the bolt (41); the chassis (32) is arranged at one end of the expansion sleeve (3), and the connecting part (22) is arranged at one end of the extending part (21).

8. The drill rod connecting structure as claimed in claim 1, wherein a first taper threaded hole is formed at one end of the joint body (2), and the power head output shaft (1) is matched with the first taper threaded hole so as to be fixedly connected with the joint body (2).

9. The connection structure of the drill rod as claimed in claim 8, further comprising a drill rod, wherein the other end of the joint body (2) is provided with a second taper thread hole (25), and one end of the drill rod is matched with the second taper thread hole (25) so as to be fixedly connected with the other end of the joint body (2).

10. A down-the-hole drill comprising a drill pipe connection according to any one of claims 1 to 9.