CN114799981B - Machining drill bit installation mechanism - Google Patents
Machining drill bit installation mechanism Download PDFInfo
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- CN114799981B CN114799981B CN202210531886.7A CN202210531886A CN114799981B CN 114799981 B CN114799981 B CN 114799981B CN 202210531886 A CN202210531886 A CN 202210531886A CN 114799981 B CN114799981 B CN 114799981B
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- mounting box
- drill rod
- box
- drill
- rod
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/12—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for securing to a spindle in general
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
The invention discloses a mechanical processing drill bit mounting mechanism which comprises a mounting box, wherein a transmission shaft is mounted at the top of the mounting box, a drill rod is mounted in the mounting box, the bottom of the drill rod extends out of the mounting box, a sealing mechanism is arranged at the bottom of the mounting box and used for sealing a gap between the drill rod and the mounting box, the drill rod is fixed through a clamping mechanism arranged in the mounting box, the clamping mechanism is mounted on the inner wall of the mounting box, a triggering positioning mechanism is arranged on the rear side wall in the mounting box, the end part of the triggering positioning mechanism is clamped with the top of the drill rod, and the drill rod gives a signal to the clamping mechanism through the triggering positioning mechanism and clamps and fixes the drill rod. According to the invention, the automatic clamping of the drill rod during the installation can be realized by triggering the positioning mechanism, and meanwhile, the sealing mechanism can seal the gap generated by the drill rods with different outer diameters and the installation box, so that the structural components in the installation box are protected, and the service life of the structural components is prolonged.
Description
Technical Field
The invention relates to the technical field of installation, in particular to a machining drill bit installation mechanism.
Background
In machining, it is often necessary to use a drilling tool, the drill bit on which is typically mounted and secured to the apparatus by a mounting structure. The existing installation mechanism is used for adapting to drills with different specifications, an installation box is generally adopted, and a clamping structure is arranged in the installation box to clamp the drills, so that installation and disassembly are convenient. However, the outer diameters of the drill rods of the drills of different specifications are generally different, and gaps exist between the drill rods and the side walls of the mounting box when the drill rods are matched with the mounting box, so that impurities such as dust and fragments generated during the working of the drill rods can enter the mounting box, and the service life of structural members in the mounting box can be prolonged. Accordingly, one skilled in the art would provide a machining bit mounting mechanism that addresses the problems set forth in the background above.
Disclosure of Invention
In order to solve the technical problems, the invention provides a mechanical processing drill bit mounting mechanism, which comprises a mounting box, wherein a transmission shaft is mounted at the top of the mounting box, a drill rod is mounted in the mounting box, the bottom of the drill rod extends out of the mounting box, a sealing mechanism is arranged at the bottom in the mounting box and is used for sealing a gap between the drill rod and the mounting box, the drill rod is fixed through a clamping mechanism arranged in the mounting box, the clamping mechanism is mounted on the inner wall of the mounting box, a triggering positioning mechanism is arranged on the rear side wall in the mounting box, the end part of the triggering positioning mechanism is clamped with the top of the drill rod, and the drill rod gives a signal to the clamping mechanism through the triggering positioning mechanism and clamps and fixes the drill rod.
Preferably: the mounting box is characterized in that a through hole for a drill rod to pass through is formed in the bottom of the mounting box, an arc-shaped groove is formed in the outer side of the through hole on the upper surface of the bottom of the mounting box, and sliding grooves are formed in the front side and the rear side of the mounting box.
Preferably: the drill rod comprises a rod body, the bottom of the rod body is provided with a drill bit, the left side and the right side of the top of the rod body are respectively provided with a jack, the jacks are used for being clamped with the clamping mechanisms, the top of the drill rod is provided with a top groove, and the top groove is used for being clamped with the triggering positioning mechanism.
Preferably: the trigger positioning mechanism comprises a top plate, one end of the top plate is fixed on the inner wall of the mounting box, a pressing plate is arranged on the lower side of one end of the top plate, an inserting rod is arranged at the center of the lower end of the pressing plate, the inserting rod is matched with the top groove, and a plurality of miniature pressure sensors which are distributed circumferentially are arranged on the outer side of the inserting rod at the bottom of the pressing plate.
Preferably: the clamping mechanism comprises two bidirectional screws, one ends of the two bidirectional screws are respectively connected with the mounting box in a rotating mode through a first bearing, the other end of one bidirectional screw is connected with the mounting box through a second bearing in a rotating mode, a motor is mounted at the other end of the other bidirectional screw, belt pulleys are mounted on the bidirectional screws, and the two belt pulleys are connected through belt transmission.
Preferably: two all set up splint on the bi-directional screw rod, splint are equipped with two, and two splint are located the left and right sides of via hole, and two splint and bi-directional screw rod threaded connection, and the screw thread of its inside screw is reverse to the tip of two splint is equipped with protruding slider, and protruding slider is located the spout, and two opposite one side of splint all is equipped with the inserted block, inserted block and jack adaptation.
Preferably: the sealing mechanism comprises an annular air bag and a pressure display, the annular air bag is positioned in the arc-shaped groove in an initial state, a plurality of connecting ropes are arranged on the outer side wall of the annular air bag, and one ends of the connecting ropes are connected to the mounting box.
Preferably: an elastic air pipe is arranged on one side of the annular air bag, an air charging and discharging nozzle is arranged at the end part of the elastic air pipe, the air charging and discharging nozzle is embedded on the side wall of the installation box, and one end of the air charging and discharging nozzle extends out of the installation box and is provided with an air valve.
Preferably: an elastic belt is arranged in the annular air bag, connecting belts which are uniformly distributed are arranged on the elastic belt, and a miniature pressure sensor II is arranged on one side of each connecting belt.
Preferably: the pressure display is arranged on the outer side of the mounting box and is electrically connected with the miniature pressure sensor II and the miniature pressure sensor I.
The invention has the technical effects and advantages that: according to the invention, the automatic clamping of the drill rod during the installation can be realized by triggering the positioning mechanism, and meanwhile, the sealing mechanism can seal the gap generated by the drill rods with different outer diameters and the installation box, so that the structural components in the installation box are protected, and the service life of the structural components is prolonged.
Drawings
FIG. 1 is a schematic view of a mechanical drill mounting mechanism according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a second embodiment of a mechanical drill mounting mechanism;
FIG. 3 is a schematic view of the structure of a mounting case in a machining bit mounting mechanism according to an embodiment of the present application;
FIG. 4 is a schematic view of a mounting box in a machining bit mounting mechanism according to an embodiment of the present disclosure;
FIG. 5 is an exploded view of a portion of the structure of the mounting box in a machine tool bit mounting mechanism according to an embodiment of the present disclosure;
FIG. 6 is a schematic view of a trigger positioning mechanism in a machining bit mounting mechanism according to an embodiment of the present disclosure;
FIG. 7 is a schematic view of the internal structure of an annular air bag in a machining bit mounting mechanism according to an embodiment of the present application;
fig. 8 is a schematic view of the structure of fig. 7 a in a mechanical drill mounting mechanism according to an embodiment of the present application.
In the figure:
1-installing a box; 2-a transmission shaft; 3-a drill rod; 4-a clamping mechanism; 5-triggering a positioning mechanism; 6-a sealing mechanism; 101-via holes; 102-an arc-shaped groove; 103-sliding grooves; 301-jack; 302-roof groove; 303-a rod body; 41-a bidirectional screw; 42-bearing one; 43-bearing two; 44-an electric motor; 45-belt pulley; 46-a belt; 47-splints; 48-inserting blocks; 51-top plate; 52-pressing plates; 53-miniature pressure sensor one; 54-inserting a rod; 61-an annular balloon; 62-connecting ropes; 63-an elastic trachea; 64-charging and discharging nozzles; 65-pressure display; 66-an elastic belt; 67-connecting bands; 68-miniature pressure sensor two.
Detailed Description
The invention will be described in further detail with reference to the drawings and the detailed description. The embodiments of the invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Examples
Referring to fig. 1 to 8, in this embodiment, a mechanical processing drill bit installation mechanism is provided, which comprises an installation box 1, a transmission shaft 2 is installed at the top of the installation box 1, a drill rod 3 is installed inside the installation box, the bottom of the drill rod 3 extends out of the installation box 1, a sealing mechanism 6 is arranged at the bottom in the installation box 1, the sealing mechanism 6 is used for sealing a gap between the drill rod 3 and the installation box 1, the drill rod 3 is fixed through a clamping mechanism 4 arranged in the installation box 1, the clamping mechanism 4 is installed on the inner wall of the installation box 1, a triggering positioning mechanism 5 is arranged on the inner rear side wall of the installation box 1, the end part of the triggering positioning mechanism 5 is clamped with the top of the drill rod 3, and the drill rod 3 gives a signal to the clamping mechanism 4 through the triggering positioning mechanism 5 and clamps and fixes the drill rod 3;
the bottom of the installation box 1 is provided with a through hole 101 for a drill rod 3 to pass through, the upper surface of the bottom of the installation box 1 is positioned at the outer side of the through hole 101 and provided with an arc groove 102, the front side and the rear side of the installation box 1 are respectively provided with a chute 103, the drill rod 3 comprises a rod body 303, the bottom of the rod body 303 is a drill bit, the left side and the right side of the top of the rod body 303 are respectively provided with a jack 301, the jacks 301 are used for being clamped with the clamping mechanisms 4, the top of the drill rod 3 is provided with a top groove 302, and the top groove 302 is used for being clamped with the triggering positioning mechanism 5;
the triggering and positioning mechanism 5 comprises a top plate 51, one end of the top plate 51 is fixed on the inner wall of the mounting box 1, a pressing plate 52 is arranged at the lower side of one end of the top plate 51, an inserting rod 54 is arranged at the center of the lower end of the pressing plate 52, the inserting rod 54 is matched with the top groove 302, and a plurality of miniature pressure sensors 53 distributed circumferentially are arranged at the bottom of the pressing plate 52 and are positioned at the outer side of the inserting rod 54;
the clamping mechanism 4 comprises two bidirectional screws 41, one ends of the two bidirectional screws 41 are respectively connected with the mounting box 1 in a rotating way through a first bearing 42, the other end of one bidirectional screw 41 is respectively connected with the mounting box 1 in a rotating way through a second bearing 43, a motor 44 is arranged at the other end of the other bidirectional screw 41, belt pulleys 45 are respectively arranged on the bidirectional screws 41, the two belt pulleys 45 are in transmission connection through a belt 46, clamping plates 47 are respectively arranged on the two bidirectional screws 41, the two clamping plates 47 are respectively arranged on the left side and the right side of the through hole 101, the two clamping plates 47 are in threaded connection with the bidirectional screws 41, the threads of the internal screw holes are opposite, the end parts of the two clamping plates 47 are respectively provided with a raised sliding block, the raised sliding blocks are positioned in the sliding grooves 103, the opposite sides of the two clamping plates 47 are respectively provided with an inserting block 48, and the inserting blocks 48 are matched with the inserting holes 301;
the sealing mechanism 6 comprises an annular air bag 61 and a pressure display 65, the annular air bag 61 is positioned in an arc-shaped groove 102 in an initial state, a plurality of connecting ropes 62 are arranged on the outer side wall of the annular air bag 61, one end of each connecting rope 62 is connected to the mounting box 1, an elastic air pipe 63 is arranged on one side of the annular air bag 61, an air charging and discharging nozzle 64 is arranged at the end part of each elastic air pipe 63, the air charging and discharging nozzle 64 is embedded on the side wall of the mounting box 1, and one end of each air charging and discharging nozzle 64 extends out of the mounting box 1 and is provided with an air valve;
the annular air bag 61 is internally provided with an elastic belt 66, the elastic belt 66 is provided with uniformly distributed connecting belts 67, one side of each connecting belt 67 is provided with a miniature pressure sensor II 68, the pressure display 65 is arranged on the outer side of the mounting box 1, and the pressure display 65 is electrically connected with the miniature pressure sensor II 68 and the miniature pressure sensor I53.
When the invention is used, the drill rod 3 is installed in the installation box 1 through the through hole 101, then the drill rod 3 moves upwards continuously, the top groove 302 at the top of the drill rod 3 is matched with the inserting rod 54, the top of the rod body 303 in the drill rod 3 acts on the miniature pressure sensor I53 at the lower side of the pressing plate 52, the miniature pressure sensor I53 receives pressure, a signal is transmitted to the pressure display 65 and displayed, so that the position of the drill rod 3 is judged to be installed in place, at the moment, the motor 44 in the clamping mechanism 4 is started, the motor 44 drives one bidirectional screw 41 to rotate, and the other bidirectional screw 41 also rotates under the action of the belt pulley 45 and the belt 46, so that the two clamping plates 47 move towards the drill rod 3 at the moment, the inserting block 48 is inserted into the inserting hole 301, the drill rod 3 is clamped and fixed, and when the motor 44 is disassembled, the two clamping plates 47 are far away from the drill rod 3, so that the drill rod 3 can be taken out;
then, the air valve is opened through the connection of an external air source and an air charging and discharging nozzle 64, the external air source can charge the annular air bag 61, the volume of the annular air bag 61 after charging is increased, the elastic air pipe 63 is used, the annular air bag 61 is not influenced after the volume is increased, when the volume of the annular air bag 61 is increased, an elastic belt 66 in the annular air bag is also lengthened, one side of a miniature pressure sensor II 68 is tightly attached to the side wall of the annular air bag 61, when the volume of the annular air bag 61 is gradually increased, the outer side wall of the miniature pressure sensor II is gradually attached to the outer side surface of the drill rod 3, so that the miniature pressure sensor II 68 is pressed against the drill rod 3 under the pushing of internal pressure, the formed pressure is transmitted to a pressure display 65, the sealing between the annular air bag 61 and the drill rod 3 is judged after the pressure reaches a certain value, and the pressure value can be obtained through the realization test;
the drill rod 3 is installed in the installation box 1 in a clamping mode, and is clamped, so that the drill rod 3 can be installed as long as one end of the drill rod 3 clamped is identical in structure, the universality of an installation mechanism is improved, however, the drill rods 3 with different outer diameters are enabled to be in gaps with the installation box 1, so that dust or impurities and the like generated by the drill rods 3 during operation can enter the installation box 1 to affect the service life of components in the installation box 1, and gaps between the drill rods 3 and the installation box 3 can be well sealed through the arrangement of the sealing mechanism 6, and the drill rods 3 with different outer diameters can be acted on.
It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art and which are included in the embodiments of the present invention without the inventive step, are intended to be within the scope of the present invention. Structures, devices and methods of operation not specifically described and illustrated herein, unless otherwise indicated and limited, are implemented according to conventional means in the art.
Claims (2)
1. The mechanical processing drill bit mounting mechanism is characterized by comprising a mounting box (1), wherein a transmission shaft (2) is mounted at the top of the mounting box (1), a drill rod (3) is mounted in the mounting box, the bottom of the drill rod (3) extends out of the mounting box (1), a sealing mechanism (6) is arranged at the inner bottom of the mounting box (1), the sealing mechanism (6) is used for sealing a gap between the drill rod (3) and the mounting box (1), the drill rod (3) is fixed through a clamping mechanism (4) arranged in the mounting box (1), the clamping mechanism (4) is mounted on the inner wall of the mounting box (1), a triggering positioning mechanism (5) is arranged on the inner rear side wall of the mounting box (1), the end part of the triggering positioning mechanism (5) is clamped with the top of the drill rod (3), and the drill rod (3) gives a signal to the clamping mechanism (4) through the triggering positioning mechanism (5) to clamp and fix the drill rod (3);
the clamping mechanism (4) comprises two bidirectional screws (41), one ends of the two bidirectional screws (41) are respectively and rotatably connected with the mounting box (1) through a first bearing (42), the other end of one bidirectional screw (41) is rotatably connected with the mounting box (1) through a second bearing (43), a motor (44) is arranged at the other end of the other bidirectional screw (41), belt pulleys (45) are respectively arranged on the bidirectional screws (41), and the two belt pulleys (45) are in transmission connection through a belt (46);
the bottom of the installation box (1) is provided with a through hole (101) for a drill rod (3) to pass through, the upper surface of the bottom of the installation box is provided with an arc-shaped groove (102) at the outer side of the through hole (101), and the front side and the rear side in the installation box (1) are provided with sliding grooves (103);
the drill rod (3) comprises a rod body (303), the bottom of the rod body (303) is a drill bit, jacks (301) are arranged on the left side and the right side of the top of the rod body, the jacks (301) are used for being clamped with the clamping mechanism (4), a top groove (302) is formed in the top of the drill rod (3), and the top groove (302) is used for being clamped with the triggering and positioning mechanism (5);
clamping plates (47) are arranged on the two bidirectional screws (41), the two clamping plates (47) are arranged, the two clamping plates (47) are positioned on the left side and the right side of the through hole (101), the two clamping plates (47) are in threaded connection with the bidirectional screws (41), the threads of the internal screw holes of the two clamping plates are opposite, the end parts of the two clamping plates (47) are provided with protruding sliding blocks, the protruding sliding blocks are positioned in the sliding grooves (103), and inserting blocks (48) are arranged on the opposite sides of the two clamping plates (47), and the inserting blocks (48) are matched with the inserting holes (301);
the sealing mechanism (6) comprises an annular air bag (61) and a pressure display (65), the annular air bag (61) is positioned in the arc-shaped groove (102) in an initial state, a plurality of connecting ropes (62) are arranged on the outer side wall of the annular air bag (61), and one end of each connecting rope (62) is connected to the mounting box (1);
an elastic air pipe (63) is arranged on one side of the annular air bag (61), an air charging and discharging nozzle (64) is arranged at the end part of the elastic air pipe (63), the air charging and discharging nozzle (64) is embedded on the side wall of the installation box (1), and one end of the air charging and discharging nozzle (64) extends out of the installation box (1) and is provided with an air valve;
an elastic belt (66) is arranged in the annular air bag (61), connecting belts (67) which are uniformly distributed are arranged on the elastic belt (66), and a miniature pressure sensor II (68) is arranged on one side of the connecting belts (67);
the pressure display (65) is arranged on the outer side of the mounting box (1), and the pressure display (65) is electrically connected with the miniature pressure sensor II (68) and the miniature pressure sensor I (53).
2. The mechanical processing drill mounting mechanism according to claim 1, wherein the trigger positioning mechanism (5) comprises a top plate (51), one end of the top plate (51) is fixed on the inner wall of the mounting box (1), a pressing plate (52) is arranged on the lower side of one end of the top plate (51), an inserting rod (54) is arranged at the center of the lower end of the pressing plate (52), the inserting rod (54) is matched with the top groove (302), and a plurality of miniature pressure sensors (53) distributed circumferentially are arranged at the outer side of the bottom of the pressing plate (52) at the inserting rod (54).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210531886.7A CN114799981B (en) | 2022-05-16 | 2022-05-16 | Machining drill bit installation mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210531886.7A CN114799981B (en) | 2022-05-16 | 2022-05-16 | Machining drill bit installation mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN114799981A CN114799981A (en) | 2022-07-29 |
| CN114799981B true CN114799981B (en) | 2023-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210531886.7A Active CN114799981B (en) | 2022-05-16 | 2022-05-16 | Machining drill bit installation mechanism |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0018500D0 (en) * | 2000-07-27 | 2000-09-13 | Walker & Co James | Sealng structure for a rock drill bit |
| EP1080827A2 (en) * | 1999-08-26 | 2001-03-07 | DECKEL MAHO Pfronten GmbH | Working unit of a machine tool |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0724165Y2 (en) * | 1989-06-23 | 1995-06-05 | 日東工器株式会社 | Drill equipment |
| CN210254331U (en) * | 2019-05-29 | 2020-04-07 | 无锡市强仔机械制造有限公司 | Quick change device that rocking arm bore cutter was used |
| CN212635037U (en) * | 2020-04-15 | 2021-03-02 | 潘素芳 | Drilling device for machining |
| CN112247626A (en) * | 2020-10-23 | 2021-01-22 | 谢东 | Automatic two-way tight drilling machine that presss from both sides |
| CN214446163U (en) * | 2020-12-05 | 2021-10-22 | 刘慧彦 | Automatic workpiece clamping device based on Arduino |
| CN216008446U (en) * | 2021-08-16 | 2022-03-11 | 辽宁省冶金地质四0四队有限责任公司 | Orifice sealing device for geological drilling equipment |
| CN216446886U (en) * | 2021-10-29 | 2022-05-06 | 山西丛鑫液压科技集团有限公司 | Drilling gas blowout prevention integrated device |
| CN216491902U (en) * | 2021-12-17 | 2022-05-13 | 安徽港湾生态园林有限公司 | Digging device for landscaping construction |
-
2022
- 2022-05-16 CN CN202210531886.7A patent/CN114799981B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1080827A2 (en) * | 1999-08-26 | 2001-03-07 | DECKEL MAHO Pfronten GmbH | Working unit of a machine tool |
| GB0018500D0 (en) * | 2000-07-27 | 2000-09-13 | Walker & Co James | Sealng structure for a rock drill bit |
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| CN114799981A (en) | 2022-07-29 |
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