Vibration reduction drill bit
By introducing axial, radial, and circumferential elastic dampers and anti-drop structures into the PDC drill bit, the problem of premature drill bit failure due to vibration in complex formations has been solved, achieving efficient and long-life drilling results.
Patent Information
- Application Number
- CN202520731998.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-17
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2035-04-17
AI Technical Summary
PDC drill bits are prone to premature failure due to axial, lateral and torsional impact vibrations when drilling into complex formations, especially in gravel-bearing and mixed soft and hard formations, resulting in low drilling efficiency and short lifespan.
A vibration-damping drill bit is designed, which uses axial, radial and circumferential elastic damping bodies between the joint body and the drill bit body, combined with an anti-drop structure. The elastic damping bodies absorb and buffer vibrations in different directions, and achieve reset during relative torsion to prevent detachment.
It effectively reduces drill bit vibration, improves drill bit efficiency and lifespan in complex formations, ensures downhole operation safety, and reduces the impact on rotary guide tools.
Smart Images
Figure CN223806077U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of petroleum and geological drilling tool, specifically, relate to a vibration reduction drill bit. BACKGROUND
[0002] With the development of drilling technology, the stratum drilled is increasingly complicated, and the rock breaking tool such as the drill bit is subjected to irregular impact of different amplitudes and different frequencies at any time, and dynamic impact becomes one of the main reasons causing the PDC drill bit to fail prematurely. Specifically, when the PDC drill bit drills in the gravel-bearing stratum, hard stratum and soft-hard alternating stratum, the rock breaking resistance that is large or small at random easily causes the drill bit to lose stability, axial, lateral and torsional impact vibration occurs, leading to the fragmentation and chipping of the diamond layer of the PDC cutting tooth, and thus causing the damage and failure of the PDC cutting tooth and the PDC drill bit.
[0003] Therefore, how to improve the impact resistance of the PDC drill bit and the cutting tooth, and ensure that the PDC drill bit can drill in the gravel-bearing, soft-hard alternating and other complex strata with high efficiency and long service life, is an eternal topic that needs to be solved in the field of drilling tool technology. CONTENT OF THE UTILITY MODEL
[0004] The utility model aims at providing a vibration reduction drill bit, which not only plays the role of axial, radial and circumferential vibration reduction, but also ensures the safety of the drill bit in downhole operation, especially when the drill bit is in directional operation, the influence of drill bit vibration on the rotary guide tool can be effectively reduced.
[0005] In order to achieve the purpose of the utility model, the technical scheme adopted is as follows: a vibration reduction drill bit, comprising a joint body and a drill bit body which are mutually sleeved, an axial elastic vibration reduction body is arranged in the axial gap between the joint body and the drill bit body, and a radial elastic vibration reduction body is arranged in the radial gap between the joint body and the drill bit body; a falling prevention structure is jointly installed on the joint body and the drill bit body, and the falling prevention structure allows the joint body and the drill bit body to be twisted with each other but not separated.
[0006] Further, a limiting step is further formed on the outer wall of the drill bit body, the limiting step and the sleeving end face of the joint body are both provided with protrusions which are uniformly and spacedly arranged along the circumferential direction, the protrusions on the limiting step and the protrusions on the sleeving end face of the joint body are mutually engaged, and a circumferential elastic vibration reduction body is arranged between at least one set of mutually engaged protrusions.
[0007] Further, a limiting step is further formed on the outer wall of the drill bit body, the limiting step and the sleeving end face of the joint body are both provided with protrusions which are uniformly and spacedly arranged along the circumferential direction, the protrusions on the limiting step and the protrusions on the sleeving end face of the joint body are mutually engaged, and a circumferential elastic vibration reduction body is arranged between at least one set of mutually engaged protrusions.
[0008] Further, the limiting step and the sleeving end face of the joint body or the limiting step and the sleeving end face of the drill bit body have axial spacing, and the circumferential elastic damping body further has an axial damping part in the axial spacing.
[0009] Further, the thickness of the circumferential elastic damping body is greater than the thickness of the axial damping part.
[0010] Further, the protruding block is triangular, rectangular, trapezoidal, semicircular or petal-shaped.
[0011] Further, the axial elastic damping body, the radial elastic damping body, the circumferential elastic damping body and the axial damping part are all elastic rubber.
[0012] Further, the axial elastic damping body, the radial elastic damping body, the circumferential elastic damping body and the axial damping part are an integral structure, and the four form a cap structure, and a through hole is further formed in the axial elastic damping body and communicates the drill bit body and the joint body.
[0013] Further, the axial elastic damping body, the radial elastic damping body, the circumferential elastic damping body and the axial damping part are all vulcanized and formed on the joint body or the drill bit body.
[0014] Further, the anti-falling structure comprises arc-shaped grooves formed on opposite surfaces of the joint body and the drill bit body, the radial elastic damping body is provided with an avoiding opening corresponding to the arc-shaped groove, and an anti-falling piece is installed in the arc-shaped groove, and the anti-falling piece is located in the two arc-shaped grooves corresponding to each other.
[0015] Further, the anti-falling piece is circular arc-shaped, the curvature of the anti-falling piece is equal to the curvature of the arc-shaped groove, and the thickness of the anti-falling piece is not greater than the depth of the arc-shaped groove on the joint body or / and the depth of the arc-shaped groove on the drill bit body; the joint body or the drill bit body is further provided with an adjusting piece for adjusting the movement of the anti-falling piece along the radial direction thereof.
[0016] Further, the joint body or the drill bit body is further provided with a mounting opening, the adjusting piece is a bolt mounted in the mounting opening, and the anti-falling piece is further provided with a threaded hole corresponding to the bolt.
[0017] The utility model discloses the beneficial effect is:
[0018] In the utility model, when the drill bit produces axial vibration, axial elastic damping body and axial damping part can all buffer the axial vibration, when the drill bit produces radial vibration, radial elastic damping body can buffer the radial vibration, when the drill bit produces circumferential torsion, the relative torsion between joint body and drill bit body can be eliminated, and in the process of the relative torsion between joint body and drill bit body, circumferential elastic damping body can absorb the vibration in the torsion process, and circumferential elastic damping body can also reset joint body and drill bit body which have relative torsion. That is to say, the utility model not only can play axial, radial and circumferential damping, but also can guarantee the safety of the drill bit in downhole operation, so that the drill bit can effectively reduce the influence of drill bit vibration on rotary guide tool when directional operation is carried out. BRIEF DESCRIPTION OF DRAWINGS
[0019] The accompanying drawings illustrate exemplary embodiments of the present utility model and together with the general description given above, and explained below, serve to explain the principles of the utility model. These drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification.
[0020] Figure 1 It is the structure diagram of the damping drill bit provided by the utility model;
[0021] Figure 2 It is the sectional view of the damping drill bit provided by the utility model;
[0022] Figure 3 It is the structure diagram of joint body;
[0023] Figure 4 It is the sectional view of joint body;
[0024] Figure 5 It is the structure diagram of drill bit body;
[0025] Figure 6 It is the structure diagram of anti-drop piece.
[0026] Markings in the drawings and corresponding component names:
[0027] 1, joint body, 2, drill bit body, 3, axial elastic damping body, 4, radial elastic damping body, 5, circumferential elastic damping body, 6, anti-drop structure;
[0028] 11, mounting port;
[0029] 21, limiting step, 22, protruding block;
[0030] 51, axial damping part;
[0031] 61, arc-shaped groove, 62, anti-drop piece, 63, adjusting piece. DETAILED DESCRIPTION
[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present invention are shown in the accompanying drawings.
[0033] It should be noted that, where there is no conflict, the embodiments and features described in these embodiments can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0034] like Figures 1 to 6 As shown, this embodiment provides a vibration-damping drill bit, including a connector body 1 and a drill bit body 2. The connector body 1 is sleeved on the drill bit body 2, and the inner hole of the connector body 1 communicates with the inner hole of the drill bit body 2. There is a radial gap between the inner wall of the connector body 1 and the outer wall of the drill bit body 2. There is an axial gap between the bottom of the insertion hole on the connector body 1 and the insertion end face of the drill bit body 2. After the drill bit body 2 is sleeved on the connector body 1, the drill bit body 2 can not only move along the axial and radial directions of the connector body 1, but also rotate on the connector body 1.
[0035] An axial elastic damper 3 is installed within the axial gap between the connector body 1 and the drill bit body 2. The axial elastic damper 3 is used to absorb vibrations in the axial direction of the drill bit body 2. A radial elastic damper 4 is installed within the radial gap between the connector body 1 and the drill bit body 2. The radial elastic damper 4 is used to absorb vibrations in the diameter direction of the drill bit body 2. To prevent the drill bit body 2 from separating from the connector body 1 during drilling, an anti-drop structure 6 is installed on both the drill bit body 2 and the connector body 1. This anti-drop structure 6 also allows relative torsion between the drill bit body 2 and the connector body 1, ensuring that the drill bit body 2 will not detach even when subjected to axial, radial, and circumferential displacement on the connector body 1, thereby ensuring normal drilling.
[0036] It should be noted that the relative torsion between the drill bit body 2 and the connector body 1 does not mean that the drill bit body 2 and the connector body 1 can rotate relative to each other, but rather that the drill bit body 2 and the connector body 1 can rotate relative to each other by a certain angle, and the drill bit body 2 and the connector body 1 can simultaneously undergo forward and reverse torsion, so that the connector body 1 and the drill bit body 2 can be reset after relative torsion. This allows the rotation of the drill bit body 2 around the connector body 1 during drilling to be compensated by the relative torsion between the connector body 1 and the drill bit body 2, thereby eliminating the relative torsion between the connector body 1 and the drill bit body 2.
[0037] In the utility model, the relative torsion angle between drill bit main body 2 and joint main body 1 is not limited, for example: the relative torsion angle between drill bit main body 2 and joint main body 1 can be 5 °, 10 °, 15 °, 20 °, and the relative torsion angle between drill bit main body 2 and joint main body 1 can be determined according to actual conditions, but it can be determined that the greater the relative torsion angle between drill bit main body 2 and joint main body 1, the greater the circumferential displacement of drill bit main body 2 in the circumferential direction of joint main body 1, and it can also lead to greater circumferential vibration of drill bit main body 2 on joint main body 1 during drilling.
[0038] In the utility model, the outer wall of drill bit main body 2 further has a limiting step 21, after joint main body 1 is sleeved on drill bit main body 2, the end face of the sleeving end of joint main body 1 is oppositely arranged with limiting step 21. Limiting step 21 has a plurality of protrusions extending to joint main body 1 in the axial direction of drill bit main body 2, a plurality of protrusions 22 are integrated with drill bit main body 2, and a plurality of protrusions 22 are spaced apart in the circumferential direction of drill bit main body 2, and a groove is formed between adjacent two protrusions 22, and the groove bottom is the surface of limiting step 21; at the same time, the end face of the sleeving end of joint main body 1 also has a plurality of protrusions 22 extending to drill bit main body 2 in the axial direction of joint main body 1, a plurality of protrusions 22 are integrated with joint main body 1, and a plurality of protrusions 22 are spaced apart in the circumferential direction of joint main body 1, and a groove is also formed between adjacent two protrusions 22, and the groove bottom is the end face of the sleeving end of joint main body 1.
[0039] When drill bit main body 2 and joint main body 1 are sleeved and installed, the protrusions 22 on drill bit main body 2 and the protrusions 22 on joint main body 1 are misaligned, and the groove between the adjacent two protrusions 22 on drill bit main body 2 corresponds to the protrusions 22 on joint main body 1, and the protrusions 22 on drill bit main body 2 correspond to the groove between the adjacent two protrusions 22 on joint main body 1, so that the protrusions 22 on drill bit main body 2 and the protrusions 22 on joint main body 1 are in occlusion; two protrusions 22 occluded with each other are taken as a group, at least one group of two protrusions 22 occluded with each other is provided with a circumferential elastic damping body 5 between drill bit main body 2 and joint main body 1 after sleeving and installation, so that when drill bit main body 2 and joint main body 1 are relatively twisted after sleeving and installation, the circumferential elastic damping body 5 will be extruded, the circumferential vibration generated during drilling of the drill bit can be buffered, and after drill bit main body 2 and joint main body 1 are relatively twisted, the circumferential elastic damping body 5 can also push drill bit main body 2 and joint main body 1 to reverse twist through the elastic force of itself, so that the relative twist of drill bit main body 2 and joint main body 1 is reset.
[0040] Of course, in the utility model, the convex block 22 on the drill bit main body 2 and the convex block 22 on the joint main body 1 are mutually engaged, and a circumferential elastic damping body 5 is arranged between every two adjacent convex blocks 22, which not only effectively improves the circumferential damping effect of the drill bit, but also enables the drill bit main body 2 and the joint main body 1 to quickly reset after relative torsion.
[0041] In addition, the height of the convex block 22 on the drill bit main body 2 is equal to the height of the convex block 22 on the joint main body 1, and when the drill bit main body 2 and the joint main body 1 in the utility model are sleeved, the convex block 22 on the drill bit main body 2 has a certain axial spacing with the end face of the joint main body 1, and the convex block 22 on the joint main body 1 also has a certain axial spacing with the limiting step 21 on the drill bit main body 2, and the circumferential elastic damping body 5 further has an axial damping part 51 located in the axial spacing, the axial damping part 51 and the axial elastic damping body 5 are an integral structure, and the axial damping part 5 can buffer when the drill bit main body 2 produces axial shaking, further axially damping the drill bit.
[0042] When the convex block 22 on the drill bit main body 2 and the convex block 22 on the joint main body 1 are mutually engaged, and the circumferential elastic damping body 5 is arranged between the two mutually engaged convex blocks 22, the plurality of convex blocks 22 on the drill bit main body 2 and the joint main body 1 have the axial damping part 51 between the end face of the joint main body 1, and the plurality of convex blocks 22 on the joint main body 1 have the axial damping part 51 between the limiting step 21.
[0043] In order to ensure that the circumferential elastic damping body 5 can fully buffer when the drill bit main body 2 and the joint main body 1 produce relative torsion, when the convex block 22 on the drill bit main body 2 and the convex block 22 on the joint main body 1 are arranged, the spacing between the two mutually engaged convex blocks 22 is greater than the axial spacing between the convex block 22 on the drill bit main body 2 and the end face of the joint main body 1, and the spacing between the two mutually engaged convex blocks 22 is greater than the axial spacing between the convex block 22 on the joint main body 1 and the limiting step 21 on the drill bit main body 2, which not only ensures the relative torsion of the drill bit main body 2 and the joint main body 1, but also ensures that the circumferential elastic damping body 5 can have enough elasticity to absorb the circumferential vibration of the drill bit main body 2 on the joint main body 1.
[0044] The protrusions 22 on the drill bit body 2 and the protrusions 22 on the joint body 1 can be triangular, rectangular, trapezoidal, semicircular or petal-shaped, etc. It should be noted that when the protrusions 22 on the drill bit body 2 and the protrusions 22 on the joint body 1 are triangular, the protrusions 22 on the drill bit body 2 and the protrusions 22 on the end face of the joint body 1 are sequentially connected, that is, the limiting steps 21 on the drill bit body 2 and the end face of the joint body 1 are sawtooth faces; when the protrusions 22 on the drill bit body 2 and the protrusions 22 on the joint body 1 are semicircular or petal-shaped, the protrusions 22 on the drill bit body 2 and the protrusions 22 on the end face of the joint body 1 are connected through arc faces, that is, the limiting steps 21 on the drill bit body 2 and the end face of the joint body 1 are wave faces.
[0045] The axial elastic damping body 3, the radial elastic damping body 4, the circumferential elastic damping body 5 and the axial damping part 51 in the utility model are all elastic rubber, the axial elastic damping body 3 is arranged in the axial gap between the bottom of the joint body 1 and the end face of the joint body 1, the radial elastic damping body 4 is arranged on the circumferential face of the joint body 1, the circumferential elastic damping body 5 is arranged between the adjacent two protrusions 22, and the axial damping part 51 is arranged between the protrusions 22 on the drill bit body 2 and the end face of the joint body 1 and between the protrusions 22 on the joint body 1 and the limiting steps 21 on the drill bit body 2. By making the axial elastic damping body 3, the radial elastic damping body 4, the circumferential elastic damping body 5 and the axial damping part all be rubber, the drill bit body 2 and the joint body 1 can be sealed after being connected, mud is prevented from entering the gap between the drill bit body 2 and the joint body 1, and the drilling of the drill bit is ensured.
[0046] The axial elastic damping body 3, the radial elastic damping body 4, the circumferential elastic damping body 5 and the axial damping part in the utility model are integrated structures, in order to facilitate the smooth entry of mud into the drill bit body 2, a through hole is further formed in the axial elastic damping body 3, and the diameter of the through hole is equal to the inner hole diameter of the drill bit body 2; in order to avoid the axial elastic damping body 3, the radial elastic damping body 4 and the axial damping part 51 being broken due to wrinkle caused by extrusion when the drill bit body 2 and the joint body 1 are relatively twisted, the axial elastic damping body 3, the radial elastic damping body 4, the circumferential elastic damping body 5 and the axial damping part 51 are all vulcanized and formed on the joint body 1 during the production process, so that the axial elastic damping body 3, the radial elastic damping body 4, the circumferential elastic damping body 5 and the axial damping part 51 are integrated with the joint body 1, and the service life of the axial elastic damping body 3, the radial elastic damping body 4, the circumferential elastic damping body 5 and the axial damping part 51 is improved.
[0047] In the utility model, in order to avoid that drill head main body 2 is separated from joint main body 1, prevent falling structure 6 includes the arc slot 61 of being set up on the outer wall of drill head main body 2 insertion end and the inner wall of joint main body 1 sleeve end, the arc slot 61 on drill head main body 2 and the arc slot 61 on joint main body 1 correspond to each other, in order to avoid that radial elastic damping body 4 is isolated to two arc slots 61, radial elastic damping body 4 also has the avoiding mouth of corresponding with arc slot 61 and is set up on it;Meanwhile, the arc slot 61 on drill head main body 2 and the arc slot 61 on joint main body 1 form an annular cavity with rectangular section together, and the annular cavity is installed with prevent falling piece 62, the length of prevent falling piece 62 is less than the length of arc slot 61, the height of prevent falling piece 62 is less than the width of arc slot 61, so that prevent falling piece 62 can slide along the axial direction in arc slot 61.Prevent falling piece 62 after installation, a part of prevent falling piece 62 is located in the arc slot 61 on joint main body 1, another part of prevent falling piece 62 is located in the arc slot 61 of drill head main body 2, through the cooperation of prevent falling piece 62, the arc slot 61 on drill head main body 2 and the arc slot 61 on joint main body 1, the separation between drill head main body 2 and joint main body 1 can be effectively prevented.By installing prevent falling piece 62 in the annular cavity, by the cooperation of the two ends of prevent falling piece 62 with the two ends of arc slot 61 respectively, the upper and lower surfaces of prevent falling piece 62 with the two sides of arc slot 61, the drill head main body 2 and joint main body 1 can not fall off while generating axial displacement, radial displacement and circumferential displacement, ensuring the installation of drill head main body 2 and the subsequent drilling of drill.
[0048] In the utility model, the arc slot 61 on joint main body 1 and the arc slot 61 on drill head main body 2 can also be directly provided as ring grooves.
[0049] In the utility model, prevent falling piece 62 is circular, the curvature of prevent falling piece 62 is equal to the curvature of arc slot 61, and prevent falling piece 62 is multiple, and the multiple prevent falling pieces 62 are arranged at intervals along the axial direction of arc slot 61;Meanwhile, the thickness of prevent falling piece 62 is equal to the depth of arc slot 61 on joint main body 1, and the thickness of prevent falling piece 62 can also be equal to the depth of arc slot 61 on drill head main body 2, so that when the drill head main body 2 and joint main body 1 are sleeved, prevent falling piece 62 can be placed in one of arc slot 61, to ensure the sleeving of drill head main body 2 and joint main body 1;In order to ensure that, after installation, a part of prevent falling piece 62 is located in the arc slot 61 on joint main body 1, and another part of prevent falling piece 62 is located in the arc slot 61 on drill head main body 2, an adjusting piece 63 capable of adjusting the movement of prevent falling piece 62 along the radial direction of joint main body 1 is further arranged on joint main body 1, so that, after installation, prevent falling piece 63 can be located in the arc slot 61 on drill head main body 2 and the arc slot 61 on joint main body 1 at the same time by adjusting piece 63.
[0050] In the present application, the depth of the arc-shaped groove 61 on the drill bit body 2 can also be less than the thickness of the anti-drop piece 62, in which case, if the depth of the arc-shaped groove 61 on the joint body 1 is greater than or equal to the thickness of the anti-drop piece 62, the anti-drop piece 62 can be first installed in the arc-shaped groove 61 on the joint body 1, then the drill bit body 2 and the joint body 1 are assembled, and finally the position of the anti-drop piece 62 is adjusted. This design can also facilitate the assembly of the drill bit body 2 and the joint body 1 while achieving anti-drop. Similarly, the depth of the arc-shaped groove 61 on the drill bit body 2 and the depth of the arc-shaped groove 61 on the joint body 1 can both be greater than or equal to the thickness of the anti-drop piece 62, and when the drill bit body 2 and the joint body 1 need to be assembled, the anti-drop piece 62 can be placed in one of the arc-shaped grooves 61, and then the position of the anti-drop piece 62 is adjusted. That is, in the present application, in order to facilitate the installation of the anti-drop piece 62, it is only necessary to ensure that the depth of the arc-shaped groove 61 on the drill bit body 2 or the depth of the arc-shaped groove 61 on the joint body 1 is greater than or equal to the thickness of the anti-drop piece 62.
[0051] In the present application, the drill bit body 2 is also provided with an installation port 11 that can be radially penetrated, the installation port 11 corresponds to the arc-shaped groove 61, the installation port 11 is a stepped hole, and the installation port 11 is a light hole; the adjusting piece 63 is a bolt installed in the installation port 11, and the anti-drop piece 62 is also provided with a threaded hole corresponding to the bolt. After the drill bit body 2 and the joint body 1 are sleeved and installed, the bolt is placed in the installation port 11, the bolt is screwed, the threaded hole of the anti-drop piece 63 is corresponded by the bolt, the anti-drop piece 63 moves along the axial direction of the bolt while the bolt is screwed, thereby adjusting the position of the anti-drop piece 63, and the anti-drop piece 63 is located in the arc-shaped groove 61 of the joint body 1 and the arc-shaped groove 61 on the drill bit body 2 at the same time, thereby effectively preventing the drill bit body 2 and the joint body 1 from being separated.
[0052] Of course, in the present application, the drill bit body 2 can also be sleeved on the joint body 1, in which case, the limiting step 21 is located on the joint body 1, the protrusion 22 is located on the limiting step 21 and the end face of the sleeving end of the drill bit body 2, and the axial elastic damping body 3, the radial elastic damping body 4, the circumferential elastic damping body 5, and the axial damping part 51 are all provided on the drill bit body 2 in a vulcanization forming manner; at the same time, the anti-drop structure 6 includes arc-shaped grooves 61 provided on the outer wall of the jointing end of the joint body 1 and the inner wall of the sleeving end of the drill bit body 2, the two arc-shaped grooves 61 meet to form an annular cavity, the anti-drop piece 62 is installed in the annular cavity, and the installation port for installing the adjusting piece 62 is located on the drill bit body 2. This structure design can also achieve axial, radial, and circumferential damping, and the drill bit body 2 and the joint body 1 can also achieve anti-drop.
[0053] In the utility model, the anti-drop piece 62 can also be a ball installed in the arc-shaped cavity, at this time, in order to facilitate the installation of the ball, the mounting port 11 is set as a threaded hole corresponding to the arc-shaped cavity, the diameter of the mounting port 11 is matched with the diameter of the ball, when the ball needs to be installed, the ball is put into the threaded hole through the mounting port 11, finally the mounting port is plugged by using a bolt, and the installation of the anti-drop piece is more convenient and fast.
[0054] In the utility model, under the condition that the drill bit can be axially, radially and circumferentially damped, the axial elastic damping body 3 and the axial damping part 51 are damping springs, and the radial elastic damping body 4 and the circumferential elastic damping body 5 are elastic rubbers.
[0055] In the utility model, when the drill bit main body 2 is inserted into the joint main body 1, the axial elastic damping body 3, the radial elastic damping body 4, the circumferential elastic damping body 5 and the axial damping part 51 can also be set on the drill bit main body 2 in a vulcanization forming mode; when the drill bit main body 2 is sleeved on the joint main body 1, the axial elastic damping body 3, the radial elastic damping body 4, the circumferential elastic damping body 5 and the axial damping part 51 can also be set on the joint main body 1 in a vulcanization forming mode.
[0056] In the description of the present specification, the description of the terms "one embodiment / way", "some embodiments / ways", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment / way or example are included in at least one embodiment / way or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment / way or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments / ways or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments / ways or examples described in the present specification and the features of the different embodiments / ways or examples without contradiction.
[0057] Those skilled in the art should understand that the above embodiments are only for clearly illustrating the utility model, and do not limit the scope of the utility model. Based on the above disclosure, other changes or modifications can be made by those skilled in the art, and these changes or modifications are still within the scope of the utility model.
Claims
1. A vibration-damping drill bit, characterized in that The drill head body (2) is provided with a limiting step (21) on the outer wall, and the limiting step (21) and the joint body (1) are provided with protrusions (22) which are uniformly arranged along the circumferential direction on the joint body (1) and the end surface of the joint body (1) which is sleeved with the drill head body (2), the protrusions (22) on the limiting step (21) and the protrusions (22) on the joint body (1) are engaged with each other, and at least one set of the engaged protrusions (22) is provided with a circumferential elastic damping body (5).
2. The vibration-damping drill bit of claim 1, wherein, The drill head body (2) is provided with a limiting step (21) on the outer wall, and the limiting step (21) and the joint body (1) are provided with protrusions (22) which are uniformly arranged along the circumferential direction on the joint body (1) and the end surface of the joint body (1) which is sleeved with the drill head body (2), the protrusions (22) on the limiting step (21) and the protrusions (22) on the joint body (1) are engaged with each other, and at least one set of the engaged protrusions (22) is provided with a circumferential elastic damping body (5).
3. The vibration-damping drill bit of claim 1, wherein, The drill head body (2) is provided with a limiting step (21) on the outer wall, and the limiting step (21) and the joint body (1) are provided with protrusions (22) which are uniformly arranged along the circumferential direction on the joint body (1) and the end surface of the joint body (1) which is sleeved with the drill head body (2), the protrusions (22) on the limiting step (21) and the protrusions (22) on the joint body (1) are engaged with each other, and at least one set of the engaged protrusions (22) is provided with a circumferential elastic damping body (5).
4. A vibration-damping drill bit according to claim 2 or 3, characterized in that The limiting step (21) and the joint body (1) are provided with an axial gap between the limiting step (21) and the end surface of the joint body (1) which is sleeved with the drill head body (2), or the limiting step (21) and the drill head body (2) are provided with an axial gap between the limiting step (21) and the end surface of the drill head body (2) which is sleeved with the joint body (1), and the circumferential elastic damping body (5) is further provided with an axial damping part (51) which is located in the axial gap.
5. The vibration-damping drill bit of claim 4, wherein, The axial elastic damping body (3), the radial elastic damping body (4), the circumferential elastic damping body (5) and the axial damping part (51) are all made of elastic rubber.
6. The vibration-damping drill bit of claim 5, wherein, The axial elastic damping body (3), the radial elastic damping body (4) and the circumferential elastic damping body (5) are integrated, and the four parts form a cap structure, and the axial elastic damping body (3) is further provided with a through hole which communicates the drill head body (2) and the joint body (1).
7. The vibration-damping drill bit of claim 6, wherein, The axial elastic damping body (3), the radial elastic damping body (4), the circumferential elastic damping body (5) and the axial damping part (51) are all vulcanized and formed on the joint body (1) or the drill head body (2).
8. The vibration-damping drill bit of claim 1, wherein, The anti-falling structure (6) comprises arc-shaped grooves (61) which are formed on the opposite surfaces of the joint body (1) and the drill head body (2), the radial elastic damping body (4) is provided with an avoiding opening which corresponds to the arc-shaped groove (61), and the anti-falling part (62) is installed in the arc-shaped groove (61), and the anti-falling parts are located in the two corresponding arc-shaped grooves (61).
9. The vibration-damping drill bit of claim 8, wherein, The anti-falling part (62) is in the shape of a circular arc, the curvature of the anti-falling part (62) is equal to the curvature of the arc-shaped groove (61), and the thickness of the anti-falling part (62) is not greater than the depth of the arc-shaped groove (61) on the joint body (1) or / and the depth of the arc-shaped groove (61) on the drill head body (2), and the joint body (1) or the drill head body (2) is further provided with an adjusting part (63) which adjusts the movement of the anti-falling part (62) along the radial direction.
10. The vibration-damping drill bit of claim 9, wherein, The joint body (1) or drill bit body (2) is further provided with a mounting port (11), the adjusting member (63) is a bolt mounted in the mounting port (11), and the anti-drop member (62) is further provided with a threaded hole corresponding to the bolt.