Tooth fixing device for polycrystalline teeth of drill bit

Abstract

The utility model provides a tooth fixing device for polycrystalline teeth of a drill bit, which relates to the technical field of tooth fixing devices and comprises a fastening push rod, a fastening pressing block is fixedly mounted at one end of the fastening push rod, a fastening screw sleeve is attached to one end of the fastening pressing block, an elastic protective pad is fixedly mounted at one end of the fastening screw sleeve, and the elastic protective pad is fixedly mounted at the other end of the fastening screw sleeve. And a positioning pull rod is fixedly mounted at the other end of the fastening screw sleeve. The polycrystalline tooth installing and fixing structure has the advantages that the extruding and fastening structure capable of conducting elastic deformation is arranged in the installing and fixing structure of the polycrystalline tooth, the pushing structure capable of conducting sliding adjustment is arranged on one side of the extruding and fastening structure, the acting force of extruding and fastening is conveniently enhanced, the fastening effect on the polycrystalline tooth is improved, and the service life of the polycrystalline tooth is prolonged. Meanwhile, the sleeving fixing structure capable of being in threaded connection is arranged, the end face of the polycrystalline tooth is sleeved and fastened through an elastic protection structure in the sleeving fixing structure, the installation stability of the polycrystalline tooth is further enhanced, and the stability of the polycrystalline tooth can be effectively enhanced through double fastening.

Description

Technical Field

[0001] The utility model relates to the technical field of tooth fixing devices, in particular to a tooth fixing device for drill bit polycrystalline teeth. Background Art

[0002] The methods for fixing the polycrystalline teeth of diamond drill bits can be roughly divided into three forms: one is the cold riveting extrusion fixing method, which is characterized by mechanically cold-extruding the polycrystalline teeth into the tooth holes of the drill body by relying on the interference, and then using a punch to rivet the metal edges around the teeth. The interference is not easy to control in this method, and the quality of fixing the teeth is unreliable. The second is the free molten copper infusion fixing method, which is characterized by loading the polycrystalline teeth into the tooth holes of the drill body, and after fixing the drill body, sinking the drill body into the copper liquid in the molten copper crucible to freely infuse the copper to fix the teeth. This method is not convenient for direct observation and control of the quality of fixing the teeth, and the tooth hole matrix cannot form a hard phase, and the drill bit is easy to lose teeth when working. The third is the pressureless infusion fixing method currently used more commonly at home and abroad. For example, Hughes and Smith in the United States both use this method. It is characterized by using graphite as a mold to bond the polycrystalline teeth to the positioning hole of the mold, and then using impregnated metal to sinter the polycrystalline teeth with cast tungsten carbide powder. This method requires complex equipment and processes, a long production cycle, and high costs. Therefore, a tooth fixing device is required to fix the polycrystalline teeth when the drill bit is used.

[0003] However, the existing drill bit polycrystalline tooth fixing device is not convenient for adjusting the strength of the fixing teeth during use. After long-term use, the polycrystalline teeth are prone to loosening, which is inconvenient to use. Utility Model Content

[0004] Therefore, the purpose of the present invention is to provide a drill bit polycrystalline tooth fixing device to solve the problems mentioned in the background technology and overcome the shortcomings of the prior art.

[0005] In order to achieve the above-mentioned purpose, an embodiment of the utility model on one side provides a tooth fixing device for a drill bit polycrystal tooth, including a drill bit body, a polycrystal tooth fixing groove is opened at one end of the drill bit body, an elastic pressure plate is fixedly installed inside the polycrystal tooth fixing groove, a fastening push rod is fixedly installed at one end of the elastic pressure plate, a fastening pressure block is fixedly installed at one end of the fastening push rod, a fastening screw sleeve is fitted at one end of the fastening screw sleeve, an elastic protective pad is fixedly installed at one end of the fastening screw sleeve, and a positioning pull rod is fixedly installed at the other end of the fastening screw sleeve.

[0006] Preferably, any of the above schemes has a plurality of circumferentially distributed positioning holes in the middle of the drill body, a receiving groove connected to the polycrystalline tooth fixing groove is provided on one side of the positioning hole, and a thread matching the fastening screw sleeve is provided on the surface of one end of the drill body.

[0007] The above technical solution is adopted: a positioning hole is opened to facilitate the drill body to fix the fastening screw sleeve, thereby ensuring the stability of the fastening of the fastening screw sleeve, and a storage groove is set to provide sufficient margin space for the movement of the fastening block to ensure the stability of the overall structure.

[0008] Preferably, any of the above schemes is that the elastic pressing sheet is configured as an arc-shaped structure, the elastic pressing sheet is located at one side of the receiving slide groove, and both ends of the elastic pressing sheet are fixedly mounted to the drill body.

[0009] By adopting the above technical solution, the elastic pressing sheet is used to press the installed polycrystalline teeth when the elastic pressing sheet is deformed elastically, thereby enhancing the stability of the installation of the polycrystalline teeth.

[0010] Preferably, any of the above schemes comprises a push rod and a slide rod, the push rod is fitted with an elastic pressure plate, one end of the push rod is fixedly mounted with the slide rod, and the slide rod passes through the receiving slide groove.

[0011] Preferably, any of the above schemes is that the fastening block is fixedly mounted on one end of the slide rod away from the push piece, one end of the fastening block is arranged as an inclined structure, and the fastening block is movably connected to the inside of the receiving slide groove.

[0012] The above technical solution is adopted: after the tightening block is subjected to pressure, it moves toward the inside of the receiving slide groove, and the tightening block pushes the slide rod to move, so that the slide rod drives the push piece to move toward the elastic press piece, and the push piece is used to squeeze the elastic press piece to enhance the tightening effect on the polycrystalline tooth.

[0013] Preferably, any of the above schemes has a thread groove inside the fastening screw sleeve, a connecting protrusion is provided at one end of the fastening screw sleeve, a mounting groove matching the positioning rod is provided inside the connecting protrusion, and the elastic protective pad is located on one side of the drill body.

[0014] The above technical solution is adopted: the fastening screw sleeve is fixed to one end of the drill bit through a threaded connection, and the fastening screw sleeve drives the connecting convex plate to rotate on the surface of the drill bit along with the threaded connection.

[0015] Preferably, any of the above schemes comprises a positioning rod, a positioning spring, a positioning block and a positioning rod, wherein the positioning spring is fixedly mounted inside the connecting protrusion, one end of the positioning spring is fixedly mounted with a positioning block movably connected to the connecting protrusion, and one end of the positioning block is fixedly mounted with a positioning rod.

[0016] By adopting the above technical solution, when the positioning block is engaged with the positioning hole under the action of the positioning spring, the positioning block will jam the connecting convex plate, so that the fastening screw sleeve cannot rotate, thereby enhancing the stability of the fastening screw sleeve. The positioning block can be pulled out by pulling the positioning rod to release the jammed state.

[0017] Compared with the prior art, the advantages and beneficial effects of the utility model are:

[0018] 1. An extrusion and fastening structure capable of elastic deformation is arranged inside the installation and fixing structure of the polycrystal tooth, and a pushing structure capable of sliding adjustment is arranged on one side of the extrusion and fastening structure, so as to enhance the extrusion and fastening force and improve the fastening effect on the polycrystal tooth. At the same time, a sleeve fixing structure capable of threaded connection is arranged, and the elastic protective structure inside the sleeve fixing structure is used to sleeve and fasten the end face of the polycrystal tooth, so as to further enhance the installation stability of the polycrystal tooth. The stability of the polycrystal tooth can be effectively enhanced by double fastening.

[0019] 2. A positioning structure capable of elastic movement is provided at one end of the sleeve fastening structure, and the sleeve fastening structure is limited by the positioning structure to ensure the stability of the sleeve fastening structure.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 It is a structural schematic diagram according to an embodiment of the utility model;

[0023] Figure 2 It is a schematic diagram of an explosion structure according to an embodiment of the utility model;

[0024] Figure 3 It is a schematic diagram of the top view of the drill bit body according to an embodiment of the utility model;

[0025] Figure 4 It is a schematic cross-sectional structure diagram of a fastening screw sleeve according to an embodiment of the utility model;

[0026] Among them: 1-drill bit body, 2-polycrystalline tooth fixing groove, 3-elastic pressure piece, 4-fastening push rod, 41-push piece, 42-slide rod, 5-fastening pressure block, 6-fastening screw sleeve, 7-elastic protective pad, 8-positioning pull rod, 81-positioning spring, 82-positioning block, 83-positioning rod, 9-positioning hole, 10-storage slide groove, 11-connecting convex plate. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0028] like Figure 1-4As shown, a tooth fixing device for polycrystal teeth of a drill bit according to an embodiment of the utility model comprises a drill body 1, a polycrystal tooth fixing groove 2 is opened at one end of the drill body 1, an elastic pressing plate 3 is fixedly installed inside the polycrystal tooth fixing groove 2, a fastening push rod 4 is fixedly installed at one end of the elastic pressing plate 3, a fastening pressure block 5 is fixedly installed at one end of the fastening push rod 4, a fastening screw sleeve 6 is fitted at one end of the fastening screw sleeve 6, an elastic protective pad 7 is fixedly installed at one end of the fastening screw sleeve 6, and a positioning pull rod 8 is fixedly installed at the other end of the fastening screw sleeve 6.

[0029] Preferably, any of the above schemes has a plurality of circumferentially distributed positioning holes 9 in the middle of the drill body 1, a receiving groove 10 connected to the polycrystalline tooth fixing groove 2 is provided on one side of the positioning hole 9, and a thread matching the fastening screw sleeve 6 is provided on the surface of one end of the drill body 1.

[0030] The above technical solution is adopted: a positioning hole 9 is opened to facilitate the drill body 1 to fix the fastening screw sleeve 6, thereby ensuring the stability of the fastening of the fastening screw sleeve 6, and a receiving groove 10 is set to provide sufficient margin space for the movement of the fastening block 5 to ensure the stability of the overall structure.

[0031] Preferably, any of the above schemes is that the elastic pressing sheet 3 is configured as an arc-shaped structure, the elastic pressing sheet 3 is located at one side of the receiving slide groove 10 , and both ends of the elastic pressing sheet 3 are fixedly mounted to the drill body 1 .

[0032] The above technical solution is adopted: the elastic pressing sheet 3 is used to press the installed polycrystalline teeth when the elastic pressing sheet 3 itself is elastically deformed, thereby enhancing the stability of the polycrystalline teeth installation.

[0033] Preferably, any of the above schemes comprises a push rod 4 including a push piece 41 and a slide rod 42 . The push piece 41 fits the elastic pressing piece 3 . The slide rod 42 is fixedly mounted on one end of the push piece 41 . The slide rod 42 passes through the receiving slide groove 10 .

[0034] Preferably, any of the above schemes is that the fastening block 5 is fixedly mounted on one end of the slide rod 42 away from the push piece 41 , one end of the fastening block 5 is arranged as an inclined structure, and the fastening block 5 is movably connected to the inside of the storage slot 10 .

[0035] The above technical solution is adopted: after the fastening block 5 is subjected to pressure, it moves toward the inside of the receiving slide groove 10, and the fastening block 5 pushes the slide rod 42 to move, so that the slide rod 42 drives the push piece 41 to move toward the elastic press piece 3, and the push piece 41 is used to squeeze the elastic press piece 3 to enhance the fastening effect on the polycrystalline tooth.

[0036] Preferably, any of the above schemes has a threaded groove inside the fastening screw sleeve 6, a connecting protrusion 11 is provided at one end of the fastening screw sleeve 6, a mounting groove compatible with the positioning rod 8 is provided inside the connecting protrusion 11, and the elastic protective pad 7 is located on one side of the drill bit body 1.

[0037] The above technical solution is adopted: the fastening screw sleeve 6 is fixed to one end of the drill bit through a threaded connection, and the fastening screw sleeve 6 drives the connecting protruding plate 11 to rotate on the surface of the drill bit along with the threaded connection.

[0038] Preferably, in any of the above schemes, the positioning rod 8 includes a positioning spring 81, a positioning block 82 and a positioning rod 83, the positioning spring 81 is fixedly installed inside the connecting protrusion 11, one end of the positioning spring 81 is fixedly installed with a positioning block 82 movably connected to the connecting protrusion 11, and one end of the positioning block 82 is fixedly installed with a positioning rod 83.

[0039] By adopting the above technical solution, when the positioning block 82 is engaged with the positioning hole 9 under the action of the positioning spring 81, the positioning block 82 will jam the connecting protrusion 11, so that the fastening screw sleeve 6 cannot rotate, thereby enhancing the stability of the fastening screw sleeve 6. The positioning block 82 can be pulled out by pulling the positioning rod 83 to release the jammed state.

[0040] The utility model is a drill bit polycrystalline tooth fixing device, the working principle is as follows:

[0041] Install the polycrystal tooth into the polycrystal tooth fixing groove 2, thread the fastening screw sleeve 6 to one end of the drill bit, and squeeze the fastening pressure block 5 by the fastening screw sleeve 6 to drive the sliding rod 42 to push the push plate 41 to squeeze the elastic pressure plate 3. The positioning block 82 is inserted into the positioning hole 9 under the action of the positioning spring 81.

[0042] Compared with the prior art, the present invention has the following beneficial effects:

[0043] 1. An extrusion and fastening structure capable of elastic deformation is arranged inside the installation and fixing structure of the polycrystal tooth, and a pushing structure capable of sliding adjustment is arranged on one side of the extrusion and fastening structure, so as to enhance the extrusion and fastening force and improve the fastening effect on the polycrystal tooth. At the same time, a sleeve fixing structure capable of threaded connection is arranged, and the elastic protective structure inside the sleeve fixing structure is used to sleeve and fasten the end face of the polycrystal tooth, so as to further enhance the installation stability of the polycrystal tooth. The stability of the polycrystal tooth can be effectively enhanced by double fastening.

[0044] 2. A positioning structure capable of elastic movement is provided at one end of the sleeve fastening structure, and the sleeve fastening structure is limited by the positioning structure to ensure the stability of the sleeve fastening structure.

Claims

1. A device for fixing polycrystalline teeth of a drill bit, comprising a drill bit body, one end of which is provided with a polycrystalline tooth fixing groove, characterized in that: An elastic pressure plate is fixedly installed inside the polycrystalline tooth fixing groove, a fastening push rod is fixedly installed on one end of the elastic pressure plate, a fastening pressure block is fixedly installed on one end of the fastening push rod, a fastening screw sleeve is attached to one end of the fastening pressure block, an elastic protective pad is fixedly installed on one end of the fastening screw sleeve, and a positioning pull rod is fixedly installed on the other end of the fastening screw sleeve.

2. A drill bit polycrystalline tooth fixing device according to claim 1, characterized in that: A plurality of circumferentially distributed positioning holes are provided in the middle of the drill body, a receiving slide groove connected to the polycrystalline tooth fixing groove is provided on one side of the positioning hole, and a thread matching the fastening screw sleeve is provided on the surface of one end of the drill body.

3. A drill bit polycrystalline tooth fixing device according to claim 2, characterized in that: The elastic pressing sheet is configured as an arc-shaped structure, the elastic pressing sheet is located at one side of the receiving slide groove, and the two ends of the elastic pressing sheet are fixedly mounted to the drill body.

4. A drill bit polycrystalline tooth fixing device as claimed in claim 3, characterized in that: The fastening push rod comprises a push piece and a slide rod, the push piece is fitted with an elastic pressing piece, one end of the push piece is fixedly mounted with the slide rod, and the slide rod passes through the receiving slide groove.

5. A drill bit polycrystalline tooth fixing device as claimed in claim 4, characterized in that: The fastening block is fixedly mounted on one end of the slide rod away from the push piece, one end of the fastening block is arranged as an inclined surface structure, and the fastening block is movably connected to the inside of the receiving slide groove.

6. A drill bit polycrystalline tooth fixing device as claimed in claim 5, characterized in that: A thread groove is provided inside the fastening screw sleeve, a connecting convex plate is arranged at one end of the fastening screw sleeve, a mounting groove matched with the positioning rod is provided inside the connecting convex plate, and the elastic protective pad is located on one side of the drill body.

7. A drill bit polycrystalline tooth fixing device as claimed in claim 6, characterized in that: The positioning pull rod includes a positioning spring, a positioning block and a positioning rod. The positioning spring is fixedly installed inside the connecting convex plate, one end of the positioning spring is fixedly installed with a positioning block movably connected to the connecting convex plate, and one end of the positioning block is fixedly installed with a positioning rod.

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