CN218439221U

CN218439221U - Eccentric drilling tool

Info

Publication number: CN218439221U
Application number: CN202223090452.2U
Authority: CN
Inventors: 杨日平; 陈真; 杨湘龙
Original assignee: Changsha Heijingang Industrial Co Ltd
Current assignee: Changsha Heijingang Industrial Co Ltd
Priority date: 2022-11-21
Filing date: 2022-11-21
Publication date: 2023-02-03
Anticipated expiration: 2032-11-21

Abstract

The application discloses eccentric drilling tool, including stabilizer and eccentric drill bit, be equipped with first boss on the afterbody of eccentric drill bit, stabilizer inner wall be equipped with first boss assorted first recess, and be equipped with first spacing groove along circumference on the stabilizer inner wall, the outer wall of afterbody is equipped with the annular groove, is equipped with the mounting hole on the stabilizer, and when the mounting hole was equipped with the pin rod, the pin rod can block in the annular groove. This eccentric drilling tool packs into the stabilizer with the afterbody of eccentric drill bit in, insert the mounting hole with the pin rod, the pin rod can block in the annular groove, make eccentric drill bit can not extract from the stabilizer, rotate eccentric drill bit, make the cell wall contact of first boss and first spacing groove, in operation, the stabilizer drives eccentric drill bit through first boss and the cooperation of first spacing groove and rotates, torsion concentrates on first boss and first spacing groove, and the pin rod can not receive the effect of torsion with the annular groove, thereby can reduce the damage of this eccentric drilling tool, and service life is prolonged.

Description

Eccentric drilling tool

Technical Field

The application relates to the technical field of drilling tools, in particular to an eccentric drilling tool.

Background

The existing eccentric drill usually consists of an eccentric drill bit, an eccentric sleeve and a rod stabilizer, wherein the eccentric drill bit and the eccentric sleeve are arranged on the rod stabilizer and are connected through threads. Eccentric drilling tool is in the use, and the eccentric drill bit of steady pole ware transmission, eccentric drill bit transmission eccentric cover, eccentric drill bit connecting portion are the helicitic texture, and the gyration torsion that creeps into during the use is whole to be concentrated in eccentric drill bit screw thread department, and the screw thread between eccentric drill bit and the steady pole ware undertakes the whole moments of torsion of transmission steady pole ware and eccentric cover, because eccentric cover atress is inhomogeneous, leads to eccentric drill bit screw thread department to appear the unbalance loading, superposes the impact force again and leads to the fact eccentric drill bit helicitic texture's damage easily.

Therefore, the technical problem to be solved by the skilled person is how to improve the existing eccentric drill to improve the strength of the eccentric drill, reduce the damage of the eccentric drill during the use process, and further improve the service life of the eccentric drill.

SUMMERY OF THE UTILITY MODEL

For solving above-mentioned technical problem, the application provides an eccentric drilling tool, eccentric drill bit passes through pin rod and mounting hole cooperation with the stabilizer, make the pin rod card in the annular groove of eccentric drill bit, thereby make eccentric drill bit extract in the stabilizer, and the stabilizer drives eccentric drill bit rotation through first boss and first spacing groove cooperation and drills, the pin rod can not receive the effect of stabilizer torsion among the drilling process, thereby can effectively reduce the damage of eccentric drilling tool, and then improved the life of eccentric drilling tool.

The technical scheme provided by the application is as follows:

the utility model provides an eccentric drilling tool, includes stabilizer and installs eccentric drill bit on the stabilizer, be equipped with first boss on the afterbody of eccentric drill bit, stabilizer inner wall along vertically be equipped with first boss assorted first recess, just correspond on the stabilizer inner wall the position circumference of first boss is equipped with first spacing groove, be equipped with the annular groove on the afterbody, correspond on the stabilizer the position of annular groove is equipped with the mounting hole, so that when being equipped with the pin rod in the mounting hole, the pin rod can block in the annular groove.

Furthermore, a second boss is arranged on the tail part, and a second limit groove is formed in the position, corresponding to the second boss, on the inner wall of the rod stabilizer.

Furthermore, the first boss and the second boss are longitudinally arranged on the tail part, and the first boss and the second boss are positioned on the same straight line.

Furthermore, first boss with the second boss sets up along circumference on the afterbody, just first boss with the second boss is located same circumference, the stabilizer inner wall along vertically be equipped with second boss assorted second recess.

Furthermore, the tail part is provided with an air hole communicated with the first center hole in the eccentric drill bit.

Furthermore, the mounting hole is a through hole, and the inner wall of one end of the mounting hole is provided with a limiting step.

Furthermore, an elastic piece is arranged at one end, far away from the limiting step, in the mounting hole and used for fixing the pin rod in the mounting hole.

Furthermore, the mounting hole is a through hole, elastic pieces are respectively arranged at two ends of the mounting hole, and the elastic pieces are used for fixing the pin rod in the mounting hole.

Furthermore, a second central hole at one end of the rod stabilizer, which is far away from the eccentric drill bit, is eccentric to the first central hole of the eccentric drill bit.

The utility model provides an eccentric drilling tool, aim at the first recess of stabilizer inner wall with first boss on the afterbody of eccentric drill bit during the installation, pack into the stabilizer in with the afterbody of eccentric drill bit, then insert the mounting hole with the pin rod, the pin rod makes eccentric drill bit install in the stabilizer with the annular groove cooperation, and eccentric drill bit can not extract from the stabilizer, make eccentric drill bit and stabilizer rotate relatively again, first boss is at first spacing inslot rotation, until the cell wall contact of first boss and first spacing groove, in operation, the stabilizer rotates, the cell wall cooperation through first boss and first spacing groove drives eccentric drill bit and rotates, the gyration torsion that creeps into concentrates on the cell wall of first boss and first spacing groove, pin rod and annular groove can not receive the influence of torsion, thereby can reduce the damage of this eccentric drilling tool, and then improve its life, and the structural strength of first boss and first spacing groove is higher than current drill bit and the screw thread strength of rod ware greatly, thereby the bulk strength of eccentric drilling tool has been improved greatly.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic view of the construction of an eccentric drilling tool according to an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a cross section at D-D of an eccentric drilling tool in the embodiment of the application;

FIG. 3 is a cross-sectional view of an eccentric bit of an eccentric drilling tool according to an embodiment of the present application;

FIG. 4 isbase:Sub>A schematic structural diagram ofbase:Sub>A cross section A-A of an eccentric bit of the eccentric drilling tool according to the embodiment of the application;

FIG. 5 is a cross-sectional view of a stabilizer of an eccentric drilling tool in an embodiment of the present application;

FIG. 6 is a left side view of a stabilizer of the eccentric drilling tool in an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a cross section B-B of a rod stabilizer of the eccentric drilling tool in the embodiment of the application;

fig. 8 is a structural schematic diagram of a cross section at C-C of a stabilizer of an eccentric drilling tool in an embodiment of the present application.

Description of the reference numerals: the rod stabilizer comprises a rod stabilizer 1, a first groove 101, a first limiting groove 102, a mounting hole 103, a limiting step 113, a second limiting groove 104, a second central hole 105, an eccentric drill bit 2, a first boss 201, an annular groove 202, a second boss 203, a first central hole 204, an air hole 205, a pin rod 3 and an elastic piece 4.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the 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 should not be considered as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "plurality" or "a plurality" means two or more unless specifically limited otherwise.

It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the practical limit conditions of the present application, so that the modifications of the structures, the changes of the ratio relationships, or the adjustment of the sizes, are not essential to the technology, and the modifications, the changes of the ratio relationships, or the adjustment of the sizes, are all within the scope of the technical contents disclosed in the present application without affecting the efficacy and the achievable purpose of the present application.

It should be noted that the longitudinal direction in this application refers to a direction along the center line of an eccentric bit or stabilizer.

As shown in fig. 1 to 8, this application embodiment provides an eccentric drilling tool, include stabilizer 1 and install eccentric drill bit 2 on the stabilizer 1, be equipped with first boss 201 on the afterbody of

eccentric drill bit

2, 1 inner wall of stabilizer along vertically be equipped with first boss 201 assorted first recess 101, just correspond on the 1 inner wall of stabilizer the position circumference of first boss 201 is equipped with first spacing groove 102, be equipped with annular groove 202 on the afterbody, correspond on the stabilizer 1 annular groove 202's position is equipped with mounting hole 103, so that when pin rod 3 is equipped with in the mounting hole 103, pin rod 3 can block in the annular groove 202.

In the eccentric drilling tool provided by the embodiment, for convenience of description, the eccentric drill bit 2 is divided into a head part and a tail part, the head part and the tail part are integrally formed, the tail part of the eccentric drill bit 2 is provided with a first boss 201, as shown in fig. 3 and 4, the rod stabilizer is provided with a first groove 101, as shown in fig. 6 and 7, during installation, the first boss 201 on the tail part of the eccentric drill bit 2 is aligned to the first groove 101 on the inner wall of the rod stabilizer 1, the tail part of the eccentric drill bit 2 is installed in the rod stabilizer 1, so that the first boss enters the first limiting groove 102 along the first groove 101, then the pin rod 3 is inserted into the installation hole 103, the pin rod 3 is clamped in the annular groove 202 on the tail part of the eccentric drill bit 2, as shown in fig. 2, the pin rod 3 is matched with the annular groove 202, so that the eccentric drill bit 2 is installed in the rod stabilizer 1, the eccentric drill bit 2 cannot be pulled out of the stabilizer 1, then the eccentric drill bit 2 and the stabilizer 1 relatively rotate, and the first boss 201 rotates in the first limiting groove 102 until the first boss 201 contacts with the groove wall of the first limiting groove 102; of course, the eccentric drill bit 2 and the rod stabilizer 1 may be rotated relative to each other, the first boss 201 rotates in the first limiting groove 102 until the first boss 201 contacts with the groove wall of the first limiting groove 102, the pin rod 3 is inserted into the mounting hole 103, and the pin rod 3 is clamped in the annular groove 202 at the tail of the eccentric drill bit 2. During operation, stabilizer 1 rotates, stabilizer 1 drives eccentric drill bit 2 through first spacing groove 102 and the cooperation of first boss 201 and rotates, stabilizer 1 drives the gyration torsion that eccentric drill bit 2 creeped into and concentrates on the cell wall of first boss 201 and first spacing groove 102, pin rod 3 can not receive torsional influence with annular groove 202, thereby can reduce the damage of this eccentric drilling tool, and then improve its life, and first boss 201 is higher than current drill bit and stabilizer 1's threaded connection intensity greatly with first spacing groove 102's structural strength, thereby the bulk strength of eccentric drilling tool has been improved greatly. When the eccentric drill bit 2 needs to be detached from the rod stabilizer 1, the pin rod 3 is pulled out, and the eccentric drill bit 1 is rotated reversely, so that the eccentric drill bit 2 can be pulled out from the rod stabilizer 1.

In order to further enhance the strength of the eccentric drill bit 2 and the rod stabilizer 1, as shown in fig. 3 and 5, a second boss 203 is arranged on the outer wall of the tail portion, and a second limit groove 104 is arranged on the inner wall of the rod stabilizer 1 corresponding to the second boss 203. Through setting up second boss 203 and second spacing groove 104, stabilizer 1 passes through second spacing groove 104 and the cooperation of second boss 203, and simultaneously through first spacing groove 102 and the cooperation of first boss 201, drive eccentric drill bit 2 and rotate, stabilizer 1 acts on first boss 201 and first spacing groove 102 and on second boss 203 and second spacing groove 104 with the torsion of eccentric drill bit 2 simultaneously, can improve the intensity of eccentric drilling tool greatly, reduce the damage that causes eccentric drill bit 2 and stabilizer 1.

Specifically, the positions of the first boss 201 and the second boss 203 may be different from each other on the same straight line along the longitudinal direction of the eccentric drill bit 2 and also different from each other on the same circumference, and at this time, in order to enable the tail of the eccentric drill bit 2 to be installed in the rod stabilizer 1, a second groove matched with the second boss 203 needs to be formed in the inner wall of the rod stabilizer 1 along the longitudinal direction.

In this embodiment, the above scheme is further optimized, the first boss 201 and the second boss 203 are longitudinally disposed on the tail portion, and the first boss 201 and the second boss 203 are located on the same straight line. First boss 201 and second boss 203 are located same straight line along vertical, and first boss 201 is the same with the width of second boss 203 along circumference, only need set up first recess 101 at stabilizer 1 inner wall, can pack into stabilizer 1 along first recess 101 with first boss 201 and second boss 203.

This embodiment provides another kind of first boss 201 and second boss 203's arrangement scheme, first boss 201 with second boss 203 sets up along circumference on the afterbody, just first boss 201 with second boss 203 is located same circumference, the inner wall of stabilizer 1 along vertically be equipped with second boss 203 assorted second recess.

In this embodiment, as shown in fig. 1 and fig. 3, the tail portion is provided with an air hole 205, and the air hole 205 is communicated with the first central hole 204 inside the eccentric drill bit 2. The provision of the air hole 205 facilitates the evacuation of air between the eccentric bit 2 and the stabilizer 1 so that the eccentric bit 2 can be smoothly loaded into the stabilizer 1.

In this embodiment, a structure of the mounting hole 103 is described, as shown in fig. 2 and fig. 8, the mounting hole 103 is a through hole, and an inner wall of one end of the mounting hole 103 is provided with a limiting step 113. The pin rod 3 is inserted into the mounting hole 103, one end of the pin rod 3 is abutted against the limit step 113, and only the other end of the pin rod 3 needs to be fixed in the mounting hole 103.

Specifically, an elastic member 4 is arranged at one end of the mounting hole 103, which is far away from the limit step 113, and the elastic member 4 is used for fixing the pin rod 3 in the mounting hole 103. The other end of pin rod 3 can be fixed in mounting hole 103 through elastic component 4, and elastic component 4 can be the elastic sleeve, and the elastic sleeve overlaps and establishes on pin rod 3, thereby makes pin rod 3 and mounting hole 103 in close contact with realize fixedly, and elastic component 4 can also be solid elasticity post, blocks up the one end of keeping away from spacing step 113 at pin rod 3 in mounting hole 103 to fix pin rod 3 in mounting hole 103.

The embodiment further provides an implementation manner of the mounting hole 103, the mounting hole 103 is a through hole, two ends of the mounting hole 103 are respectively provided with an elastic member 4, and the elastic member 4 is used for fixing the pin rod 3 in the mounting hole 103. The mounting hole 103 is a through hole, the pin rod 3 is mounted in the mounting hole 103, and the elastic members 4 are arranged at two ends of the pin rod 3, so that the pin rod 3 is fixed in the mounting hole 103.

This embodiment further illustrates a stabiliser 1 where the second central bore 105 at the end of the stabiliser 1 remote from the eccentric bit 2 is eccentric to the first central bore 204 of the eccentric bit 2.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An eccentric drilling tool, characterized by: the eccentric drill bit comprises a rod stabilizer and an eccentric drill bit installed on the rod stabilizer, wherein a first boss is arranged on the tail of the eccentric drill bit, a first groove matched with the first boss is longitudinally formed in the inner wall of the rod stabilizer, a first limiting groove is formed in the inner wall of the rod stabilizer in the circumferential direction corresponding to the first boss, an annular groove is formed in the tail of the rod stabilizer, a mounting hole is formed in the position of the annular groove corresponding to the position of the annular groove on the rod stabilizer, and therefore when a pin rod is installed in the mounting hole, the pin rod can be clamped in the annular groove.

2. The eccentric drilling tool according to claim 1, wherein a second boss is provided on the tail, and a second limit groove is provided on the inner wall of the rod stabilizer at a position corresponding to the second boss.

3. The eccentric drilling tool according to claim 2, wherein the first boss and the second boss are longitudinally disposed on the tail portion, and the first boss and the second boss are located on the same straight line.

4. The eccentric drilling tool according to claim 2, wherein the first boss and the second boss are circumferentially arranged on the tail part, the first boss and the second boss are located on the same circumference, and a second groove matched with the second boss is longitudinally arranged on the inner wall of the rod stabilizer.

5. The eccentric drilling tool according to claim 1, wherein said tail portion is provided with air holes, said air holes communicating with a first central hole inside said eccentric drilling head.

6. The eccentric drilling tool according to claim 1, wherein the mounting hole is a through hole, and a limiting step is arranged on the inner wall of one end of the mounting hole.

7. The eccentric drilling tool according to claim 6, wherein an end of the mounting hole remote from the limiting step is provided with an elastic member for fixing the pin rod in the mounting hole.

8. The eccentric drilling tool according to claim 1, wherein the mounting hole is a through hole, and both ends of the mounting hole are respectively provided with an elastic member for fixing the pin rod in the mounting hole.

9. The eccentric drilling tool of any of claims 1 to 8, wherein the second central bore of the end of the stabilizer remote from the eccentric drill bit is eccentric to the first central bore of the eccentric drill bit.