CN220415266U

CN220415266U - Rotary drilling bit

Info

Publication number: CN220415266U
Application number: CN202321840825.5U
Authority: CN
Inventors: 刘素云; 漆学伟
Original assignee: Anhui Baiyi Tiancheng Machinery Co ltd
Current assignee: Anhui Baiyi Tiancheng Machinery Co ltd
Priority date: 2023-07-13
Filing date: 2023-07-13
Publication date: 2024-01-30
Anticipated expiration: 2033-07-13

Abstract

The utility model relates to the technical field of rotary drilling roller bits, and solves the problem that hard alloy teeth cannot be embedded in the palm tip due to the fact that the weakest part of the palm back is at the palm tip position and the palm tip is thin in matrix. The utility model provides a dig cone bit soon, includes bit leg and cone, rotate through the rotation connecting piece between bit leg and the cone and be connected, rotate the connecting piece and including rolling bearing, rolling bearing's free end hand wheel is connected, cup joints and is provided with the protector and interconnect between fixed end and the bit leg outside the free end, and the protector is including wear-resisting material, and wear-resisting material installs on the relative structure body of bit leg and bearing, installs the bit leg structure body inscription of wear-resisting material in the cone, and the equidistant brazing of tip of bit leg outside the cone has a plurality of carbide teeth. The utility model enhances the hardness of the matrix at the shirttail of the leg.

Description

Rotary drilling bit

Technical Field

The utility model relates to the technical field of rotary drilling roller bits, in particular to a rotary drilling roller bit.

Background

When the rotary drilling bit works, the rotary drilling bit must axially rotate, and during rotation, abrasive rock scraps repeatedly wear the bit leg backs and the bit legs of the rotary drilling bit, so that the bit leg backs and the bit legs are worn, and once the bit legs are excessively worn, bearing failure and bit leg breakage are caused, so that engineering accidents are caused.

Therefore, manufacturers of rotary drilling roller bits choose to embed a large number of hard alloy teeth on the back of the bit leg, and it is apparent from the structural schematic diagram of the rotary drilling roller bit in fig. 6 in the specification that the weakest part of the back is at the position of the palm tip, and the palm tip is not embedded with hard alloy teeth due to the thin matrix, so it is important to increase the wear resistance of the palm tip.

Disclosure of Invention

The utility model provides a rotary drilling bit, which solves the problems that the weakest palm back is at the palm point position and the palm point is thin due to the thin matrix and hard alloy teeth cannot be embedded.

The utility model enhances the hardness of the matrix at the shirttail of the leg.

In order to achieve the above purpose, the present utility model provides the following technical solutions: a rotary drilling bit comprises a bit leg and a gear, wherein the bit leg is rotationally connected with the gear through a rotary connecting piece;

the rotary connecting piece comprises a rotary bearing, a free end hand wheel of the rotary bearing is connected, a protection piece is arranged between a fixed end sleeved outside the free end and a bit leg and is connected with each other, the protection piece comprises a wear-resistant material, the wear-resistant material is arranged on a relative structure body of the bit leg and the bearing, the bit leg structure body provided with the wear-resistant material is inscribed in a cone, and a plurality of hard alloy teeth are brazed at the end part of the bit leg outside the cone at equal intervals.

Preferably, the protection piece comprises wear-resistant materials and a conversion piece arranged on the bit leg, the conversion piece comprises a transition plate which is arranged at the joint of the bit leg and the cone and is in front-back symmetry, the transition plate is arranged on the bit leg structure, one end of the transition plate, which is far away from the bit leg, is provided with an inner lining strip, a limit strip for installing the wear-resistant materials is arranged between the two inner lining strips, a chute is formed in the limit strip, the limit strip is rotationally connected with the inner lining strip, the diameter of the chute is gradually reduced from left to right, and a limit piece for limiting the position of the wear-resistant materials in the chute is arranged in the chute.

Preferably, the wear-resistant material is disposed on the bit leg in a different mounting condition relative to the bit leg and the bearing structure.

Preferably, the rear end of the wear-resistant material is provided with a connecting strip which is in rigid connection with the wear-resistant material, the rear end of the connecting strip is detachably provided with a clamping sleeve, the front end of the clamping sleeve is provided with a clamping groove which is adaptive to the thickness of the connecting strip, and a convex strip is arranged in the clamping groove.

Preferably, the limiting piece comprises an elastic piece which is arranged on the wall of the left end of the sliding groove in a front-back symmetrical mode, a pushing tongue is arranged on the right side of the elastic piece, the pushing tongue is convexly arranged on the elastic piece, and the distance between the two pushing tongues is not larger than the width of the clamping sleeve.

Preferably, the left end face and the right end face of the clamping sleeve are symmetrically provided with butt joints, and the butt joints are matched with the elastic pieces in size.

Compared with the prior art, the utility model provides the rotary drilling bit which has the following beneficial effects:

1. according to the high-wear-resistance rotary-excavating roller bit, the hard alloy blocks are brazed at the palm tip positions of the teeth, so that the wear resistance of the palm tip is greatly improved, the strength of the palm tip is enhanced, the impact and grinding of rock fragments are effectively resisted, and the service life and safety of the rotary-excavating roller bit are greatly improved.

2. According to the utility model, the hard alloy block is brazed at the weakest palm point of the bit leg, so that the wear resistance of the palm point is greatly improved, the surface of the hard alloy block brazed at the palm point is smooth, the antifriction effect can be achieved, and the torque loss of the main shaft can be reduced on the basis of the antifriction effect and the effect of preventing the temperature rise of the palm point from damaging a bearing sealing system.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

FIG. 1 is a front view of the overall structure of the present utility model;

FIG. 2 is a top view of a first embodiment of a swivel joint assembly according to the present utility model;

FIG. 3 is a schematic view of a first embodiment of a rotary connector according to the present utility model;

FIG. 4 is a schematic diagram of a transducer according to the present utility model;

FIG. 5 is a schematic view of a limiting member according to the present utility model;

fig. 6 is a schematic structural view of a rotary cone drill bit as described in the background art.

In the figure: 1. leg portions; 2. a roller cone; 3. rotating the connecting piece; 4. a rotating bearing; 5. a guard; 6. a wear resistant material; 7. cemented carbide teeth; 8. a conversion member; 81. a transition plate; 82. a lining strip; 83. a limit bar; 84. a limiting piece; 841. an elastic sheet; 842. tightening the tongue; 85. a connecting strip; 86. and (5) clamping the sleeve.

Detailed Description

The embodiments of the present application will be described in detail below with reference to the accompanying drawings and examples, so that the implementation process of how the technical means are applied to solve the technical problems and achieve the technical effects of the present application can be fully understood and implemented accordingly.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

First embodiment:

fig. 1-2 show an embodiment of a rotary drilling bit according to the present utility model, including a bit leg 1 and a bit 2, where the bit leg 1 and the bit 2 are rotationally connected by a rotational connector 3, the rotational connector 3 includes a rotational bearing 4, in this embodiment, the rotational bearing 4 is specifically a rolling bearing, a free end of the rolling bearing is connected with a hand wheel, a protection member 5 is sleeved between a fixed end outside the free end and the bit leg 1 and is connected with each other, the protection member 5 includes a wear-resistant material 6, the wear-resistant material 6 is mounted on a relative structure of the bit leg 1 and the bearing, in this embodiment, the wear-resistant material 6 includes but is not limited to a hard alloy block, firstly the hard alloy block is soldered at a palm point of the bit leg 1 of the rotary drilling bit 2, and secondly, a conventional process flow of assembling the rotary drilling bit 2 bit. Finally, vacuumizing and oiling the bit of the rotary drilling cone 2, and then using the rotary drilling cone.

The bit leg 1 structure with the wear-resistant material 6 is inscribed in the cone 2, the end of the bit leg 1 outside the cone 2 is equidistantly brazed with a plurality of cemented carbide teeth 7, the installation state of the wear-resistant material 6 at the opposite structure of the bit leg 1 and the bearing is different, in this embodiment, the wear-resistant material 6 is installed in a monolithic form at the opposite structure of the bit leg 1 and the bearing, or is assembled in a sheet form on the opposite structure of the bit leg 1 and the bearing, and the monolithic form is dependent on the width of the structure of the bit leg 1, namely, the aim of increasing the fit degree with the bit leg 1 is to increase.

Second embodiment:

fig. 3-5 show an embodiment of the present utility model, in which the guard 5 comprises a wear-resistant material 6 and a transition piece 8 mounted on the bit leg 1, and in use, the transition piece 8 is used to first establish a connection of the wear-resistant material 6 to the bit leg 1, and the guard 5 is integrally connected to the rolling bearing 4, in this embodiment the rolling bearing 4 is embodied as a rolling bearing, whereby the guard 5 is integrally connected to the rolling bearing 4, i.e., the bit leg 1 is indirectly connected to the cone 2 via the transition piece 8 and the rolling bearing 4, and the whole structure is connected.

The transition piece 8 comprises a transition plate 81 which is arranged at the joint of the bit leg 1 and the cone 2 and is in front-back symmetry, the transition plate 81 is arranged on the bit leg 1 structure body, one end of the transition plate 81, which is far away from the bit leg 1, is provided with an inner lining strip 82, a limiting strip 83 for installing the wear-resistant material 6 is arranged between the two inner lining strips 82, the limiting strip 83 is provided with a sliding groove, the limiting strip 83 is rotationally connected with the inner lining strip 82, the opening diameter of the sliding groove is gradually reduced from left to right, the minimum opening diameter of the sliding groove is matched with the width of the clamping sleeve 86, a limiting piece 84 for limiting the position of the wear-resistant material 6 in the sliding groove is arranged in the sliding groove, the rear end of the wear-resistant material 6 is provided with a connecting strip 85 which is in rigid connection with the connecting strip, the rear end of the connecting strip 85 is detachably provided with a clamping sleeve 86, the front end of the clamping sleeve 86 is provided with a clamping groove which is matched with the thickness of the connecting strip 85, the clamping groove is internally provided with a convex strip, the connecting strip 85 is provided with a strip groove matched with the raised strips, the limiting piece 84 comprises elastic pieces 841 which are symmetrically arranged on the wall of the left end of the sliding groove, the right side of each elastic piece 841 is provided with a pushing tongue 842, the pushing tongues 842 are convexly arranged on the elastic pieces 841, the distance between the two pushing tongues 842 is not larger than the width of the clamping sleeve 86, the left end face and the right end face of the clamping sleeve 86 are symmetrically provided with opposite interfaces, the opposite interfaces are matched with the elastic pieces 841 in size, when the connecting strip is used, firstly, the wear-resistant material 6 is arranged on the connecting strip 85, the connecting strip 85 is connected in a connecting mode which is not limited by screw connection or cementing, then the connecting strip 85 slides towards the clamping groove in the clamping sleeve 86, the clamping sleeve 86 is pushed tightly in the sliding groove of the limiting strip 83 by the pushing tongue of the elastic pieces 841, and the limiting strip 83 is connected with the fixed end of the rolling bearing in a connecting mode which includes but is not limited by screw connection. Thus, firstly, the cemented carbide pieces are brazed to the bit leg 1 of the rotary cutter 2 at the point of the bit, and secondly, the free ends of the rolling bearing 4 are connected to the cutter 2 by means of, but not limited to, threaded connection. Finally, vacuumizing and oiling the bit of the rotary drilling cone 2, and then using the rotary drilling cone.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a dig roller bit soon, includes bit leg (1) and cone (2), its characterized in that: the bit leg (1) is rotationally connected with the cone (2) through a rotational connecting piece (3);

the rotary connecting piece (3) comprises a rotary bearing (4), a free end hand wheel of the rotary bearing (4) is connected, a protection piece (5) is arranged between a fixed end outside the free end and a bit leg (1) in a sleeved mode and is connected with each other, the protection piece (5) comprises a wear-resistant material (6), the wear-resistant material (6) is arranged on a relative structure body of the bit leg (1) and the bearing, the bit leg (1) structure body provided with the wear-resistant material (6) is inscribed in a cone (2), and a plurality of hard alloy teeth (7) are brazed at the end portions of the bit leg (1) outside the cone (2) at equal intervals.

2. The rotary drill bit of claim 1, wherein: the protection piece (5) comprises wear-resistant materials (6) and conversion pieces (8) arranged on the bit leg (1), the conversion pieces (8) comprise transition plates (81) which are arranged at the joint of the bit leg (1) and the gear wheel (2) and are in front-back symmetry, the transition plates (81) are arranged on the bit leg (1) structure body, one ends of the transition plates (81) far away from the bit leg (1) are provided with lining strips (82), a limiting strip (83) for arranging the wear-resistant materials (6) is arranged between the two lining strips (82), a chute is formed in the limiting strip (83), the limiting strip (83) is rotationally connected with the lining strips (82), the formed diameter of the chute is gradually reduced from left to right, and limiting pieces (84) for limiting the positions of the wear-resistant materials (6) in the chute are arranged in the chute.

3. The rotary drill bit of claim 1, wherein: the wear-resistant material (6) is arranged on the bit leg (1), and the installation state of the wear-resistant material (6) at the opposite structural bodies of the bit leg (1) and the bearing is different.

4. The rotary drill bit of claim 2, wherein: the rear end of the wear-resistant material (6) is provided with a connecting strip (85) which is rigidly connected with the wear-resistant material, the rear end of the connecting strip (85) is detachably provided with a clamping sleeve (86), the front end of the clamping sleeve (86) is provided with a clamping groove which is adaptive to the thickness of the connecting strip (85), and a convex strip is arranged in the clamping groove.

5. The rotary drill bit of claim 2, wherein: the limiting piece (84) comprises elastic pieces (841) which are symmetrically arranged on the wall of the left end of the sliding groove, the right side of each elastic piece (841) is provided with a pushing tongue (842), the pushing tongues (842) are convexly arranged on the elastic pieces (841), and the distance between the two pushing tongues (842) is not larger than the width of the clamping sleeve (86).

6. The rotary drill bit of claim 4, wherein: the left end face and the right end face of the clamping sleeve (86) are symmetrically provided with butt joints, and the butt joints are matched with the elastic sheets (841) in size.