A high-efficiency drilling hard rock cutting tool

Abstract

This invention discloses a high-efficiency drilling hard rock cutting tool, belonging to the field of cutting tool technology. The cutting tool head includes a main socket and multiple auxiliary sockets located circumferentially around the main socket. The cutting tool shank includes a main insertion cavity opened on the axial inner wall and multiple auxiliary insertion cavities located circumferentially around the main insertion cavity. The main socket is inserted into the main insertion cavity, and the auxiliary sockets are inserted into the auxiliary insertion cavities. A locking element is rotatably installed inside the cutting tool shank to lock the multiple auxiliary sockets. The end of the connecting member passes through the first slot and the second slot in sequence, simultaneously pressing the first inclined surface of the linkage block and the second inclined surface of the blocking element. The second inclined surface drives the blocking element to overcome the elastic force of the second reset element and move towards the cutting tool head along the radial inner wall of the pipeline cavity. When the locking element is fully locked, the blocking element slides to a position that fits against the top inner wall of the pipeline cavity. At this time, the third nozzle and the fourth nozzle are precisely aligned and connected, and high-pressure fluid is sprayed onto the cutting surface through the second nozzle, the third nozzle, and the fourth nozzle to achieve cooling and lubrication.

Description

Technical Field

[0001] This invention relates to the field of cutting tool technology, specifically a high-efficiency drilling cutting tool for hard rock. Background Technology

[0002] Cutting teeth are critical, easily worn components installed on equipment such as coal mining machines and tunneling machines, used for breaking coal and rock, much like the teeth of a machine. Cutting teeth typically employ a three-in-one structure, including the cutting tooth shank, the cutting tooth head, and the alloy cutter tip. The cutting tooth shank is used to connect to the equipment and must possess excellent fatigue resistance. The cutting tooth head is the critical area directly involved in cutting, and its cutting force distribution is optimized through a special geometric design. The alloy cutter tip, embedded in the cutting tooth head, is the only component in contact with the coal and rock; its wear resistance and anti-chipping properties determine the working life of the cutting tooth.

[0003] Chinese patent application CN118167305A discloses a mining cutter with enhanced adaptability to complex geological conditions, relating to the field of mining cutter technology. It includes a mining cutter assembly and a tunneling machine assembly. The mining cutter assembly is evenly distributed on the outside of the tunneling machine assembly. One end of the mining cutter assembly is provided with a cutter head assembly, and the other end is provided with a water-cooling assembly. This invention uses an alloy head and a insertion post to connect to the inner side of the cutter body. During insertion, a long strip plate and a long groove provide precise guidance, facilitating stable installation into the cutter body and preventing rotation and loosening. A toothed ring is then fitted onto the outside of the alloy head and threadedly connected with a threaded ring, while also threadedly connected to the inner side of the disc-shaped groove, thus achieving effective positioning and fixation. This installation method improves the efficiency of installation and disassembly, and facilitates quick replacement when the alloy head needs to be replaced after use.

[0004] However, the disassembly and assembly efficiency and freedom of the above-disclosed cutting teeth are generally not high. During operation, the disassembly and assembly process is cumbersome, lacks a multi-locking structure with linkage, and the delivery pipeline is easily blocked by impurities and debris when the cutting tooth handle is removed. Summary of the Invention

[0005] The purpose of this invention is to provide a high-efficiency drilling hard rock cutting tool to address the problems of the generally low efficiency and freedom of disassembly and assembly of existing cutting tools, the cumbersome disassembly and assembly process during operation, the lack of a linkage multi-locking structure, and the easy blockage of the delivery pipeline by impurities and debris when the cutting tool shank is removed.

[0006] To achieve the above objectives, the technical solution of the present invention is: a high-efficiency drilling hard rock cutting tool, comprising:

[0007] The cutting head includes a main socket and a plurality of secondary sockets located around the main socket;

[0008] The cutting tooth shank includes a main insertion cavity opened on the axial inner wall, and a plurality of secondary insertion cavities located circumferentially around the main insertion cavity;

[0009] The main socket is inserted into the main socket cavity, and the auxiliary socket is inserted into the auxiliary socket cavity; a locking element is rotatably disposed inside the cutting tooth shank, and the locking element is used to lock the multiple auxiliary sockets.

[0010] As a further embodiment of the present invention: the inside of the cutting tooth handle is provided with a linkage cavity communicating with the plurality of auxiliary insertion cavities, and the locking member is rotatably disposed in the linkage cavity; a limiting cavity is provided on the inner wall of the auxiliary socket, and linkage blocks corresponding to the plurality of auxiliary sockets are provided at intervals on the radial inner wall of the locking member, and the linkage block includes a limiting part; in the corresponding linkage block and auxiliary socket, the limiting part is used to lock the limiting cavity.

[0011] As a further embodiment of the present invention: a plurality of first slots are spaced apart on the radial inner wall of the cutting tooth shank, and a connecting member is threaded into the first slot; the linkage block further includes a first inclined surface, and the connecting member is used to press the first inclined surface and trigger the locking member to rotate.

[0012] As a further embodiment of the present invention: a plurality of slots are spaced apart on the radial inner wall of the locking member, the slots being for the connecting member to pass through; a plurality of mounting plates are spaced apart on the inner wall of the linkage cavity, the mounting plates being located within the slots; a first reset member is provided on the mounting plate, the other end of the first reset member being connected to the locking member, for driving the locking member to return to its original position and unlocking the secondary socket.

[0013] As a further aspect of the present invention: a positioning groove is provided on the first inclined surface, the positioning groove being used to accommodate the locking member.

[0014] As a further embodiment of the present invention: a pipe seat is provided on the axial inner wall of the cutting tooth shank, and a positioning cavity is formed on the axial inner wall of the pipe seat; a pipe cavity is formed on the axial inner wall of the cutting tooth head, and a positioning seat is provided on the axial inner wall of the pipe cavity; when the cutting tooth head is installed on the cutting tooth shank, the pipe seat is inserted into the pipe cavity, and the positioning seat is inserted into the positioning cavity.

[0015] As a further embodiment of the present invention: the high-efficiency drilling hard rock cutting tooth also includes a blocking member, which is slidably disposed between the radial inner wall of the pipeline cavity and the radial outer wall of the positioning seat; the blocking member is used to control the opening and closing of the cutting tooth shank and the internal nozzle of the cutting tooth head.

[0016] As a further embodiment of the present invention: a nozzle network is provided inside the cutting tooth shank, the nozzle network including a plurality of second nozzles penetrating the axial inner wall of the pipe seat; a plurality of fourth nozzles are spaced apart on the axial inner wall of the pipe cavity, the second nozzles and the fourth nozzles being offset from each other; a plurality of third nozzles are provided on the shielding member, when the shielding member is in contact with the axial inner wall of the pipe cavity, the third nozzles are in communication with the fourth nozzles; when the shielding member is in contact with the axial inner wall of the pipe seat, the shielding member blocks the plurality of second nozzles.

[0017] As a further embodiment of the present invention: the inner wall of the main socket is provided with a plurality of second slots communicating with the first slot, and the radial outer wall of the shield is provided with a plurality of second inclined surfaces; when the connector presses the second inclined surfaces, the shield moves along the radial inner wall of the pipeline cavity toward the cutting tooth head; the axial outer wall of the shield facing the cutting tooth handle is provided with a plurality of mounting grooves, and a second reset member is provided in the mounting groove, the second reset member being connected to the pipeline seat.

[0018] As a further embodiment of the present invention: the nozzle network further includes a liquid inlet opened at the bottom of the cutting tooth handle, and a plurality of first nozzles communicating with the liquid inlet; the nozzle network further includes a premixing chamber opened inside the cutting tooth handle, and the plurality of second nozzles communicating with the premixing chamber; the cutting tooth head further includes an alloy cutting head.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] This invention achieves synchronous and linked locking of multiple secondary sockets through a single locking component, thereby simplifying operation and improving reliability. The locking component is designed as an annular rotary locking sleeve, coaxially installed in the annular linkage cavity inside the cutting tooth shank. When the limiting part is screwed into the wedge-shaped limiting cavity of the secondary socket, a radial compressive force is generated due to the action of the inclined surface, firmly wedging the secondary socket in the secondary socket cavity and effectively preventing loosening.

[0021] The end of the connector passes through the first and second slots in sequence, simultaneously pressing the first inclined surface of the linkage block and the second inclined surface of the blocking component. The second inclined surface, under force, drives the blocking component to overcome the elasticity of the second reset component and move radially towards the cutting tooth head along the inner wall of the pipeline cavity. When the locking component is fully locked, the blocking component slides precisely to a position where it fits against the top inner wall of the pipeline cavity. At this point, the third and fourth nozzles are precisely aligned and connected, and high-pressure fluid is sprayed onto the cutting surface through the second, third, and fourth nozzles, achieving cooling and lubrication. Attached Figure Description

[0022] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0023] Figure 1 This is the three-dimensional structure of the present invention. Figure 1 ;

[0024] Figure 2 This is the three-dimensional structure of the present invention. Figure 2 ;

[0025] Figure 3 This is a three-dimensional structural diagram of the cutting tooth head in this invention;

[0026] Figure 4 This is a cross-sectional view of the cutting tooth head in this invention;

[0027] Figure 5 This is a three-dimensional structural diagram of the cutting tooth shank in this invention;

[0028] Figure 6 This is a cross-sectional view of the cutting tooth shank in this invention. Figure 1 ;

[0029] Figure 7 This is a cross-sectional view of the cutting tooth shank in this invention. Figure 2 ;

[0030] Figure 8 This is a three-dimensional structural diagram of the locking component in this invention;

[0031] Figure 9 This is a three-dimensional structural diagram of the shielding component in this invention;

[0032] Figure 10 This is a three-dimensional structural diagram of the present invention;

[0033] Figure 11 This is a cross-sectional view of the present invention.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Pick handle;

[0036] 101. Main insertion cavity; 102. Secondary insertion cavity; 103. Pipe seat; 104. Positioning cavity; 105. First slot; 106. Linkage cavity; 107. Mounting plate; 108. First reset component; 109. Liquid inlet; 110. First nozzle; 111. Premixing cavity; 112. Second nozzle;

[0037] 2. Cutting tooth tip;

[0038] 201. Alloy cutter head; 202. Main socket; 203. Secondary socket; 204. Pipe cavity; 205. Positioning seat; 206. Fourth nozzle; 207. Limiting cavity; 208. Second slot;

[0039] 3. Locking components;

[0040] 301. Linkage block; 302. Limiting part; 303. First inclined surface; 304. Positioning groove; 305. Slotting;

[0041] 4. Covering components;

[0042] 401. Third nozzle; 402. Mounting groove; 403. Second reset component; 404. Second inclined surface;

[0043] 5. Connectors. Detailed Implementation

[0044] The following will be combined with the appendix Figures 1 to 11 The technical solutions of the present invention have been clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0046] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0047] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0048] This invention provides an improved hard rock cutting tool for high-efficiency drilling, such as... Figures 1-11 As shown, including;

[0049] The cutting tooth head 2 includes a main socket 202 and a plurality of auxiliary sockets 203 located around the main socket 202;

[0050] The cutting tooth shank 1 includes a main insertion cavity 101 opened on the axial inner wall, and a plurality of secondary insertion cavities 102 located circumferentially in the main insertion cavity 101.

[0051] The main socket 202 is inserted into the main socket cavity 101, and the auxiliary socket 203 is inserted into the auxiliary socket cavity 102; a locking element 3 is rotatably installed inside the cutting tooth handle 1, which is used to lock the multiple auxiliary sockets 203.

[0052] The core of this device lies in using a locking element 3 to achieve synchronous and linked locking of multiple auxiliary sockets 203, thereby simplifying operation and improving reliability. The locking element 3 is designed as a ring-shaped rotary locking sleeve, coaxially installed in the ring-shaped linkage cavity 106 inside the cutting tooth handle 1. Using a special tool, such as an Allen wrench, the locking element 3 at the end of the cutting tooth handle 1 is rotated. As the locking element 3 rotates, all the linkage blocks 301 on its inner wall will rotate synchronously. When the limiting part 302 is screwed into the wedge-shaped limiting cavity 207 of the auxiliary socket 203, a radial compressive force is generated due to the action of the inclined surface, firmly wedging the auxiliary socket 203 in the auxiliary socket cavity 102, effectively preventing loosening.

[0053] See appendix Figure 3 Appendix Figure 6 - Appendix Figure 8 The cutting tooth handle 1 has a linkage cavity 106 that communicates with multiple auxiliary insertion cavities 102 inside. The locking member 3 is rotatably disposed in the linkage cavity 106. The inner wall of the auxiliary socket 203 has a limiting cavity 207. The radial inner wall of the locking member 3 is provided with linkage blocks 301 that correspond to the multiple auxiliary sockets 203 at intervals. The linkage block 301 includes a limiting part 302. In the corresponding linkage block 301 and auxiliary socket 203, the limiting part 302 is used to lock the limiting cavity 207.

[0054] In this embodiment: the linkage cavity 106 adopts an annular cavity structure, coaxially opened inside the cutting tooth shank 1, and the inner wall is provided with an annular limiting groove and a lubrication groove (not shown). The limiting groove is used to limit the axial displacement of the locking member 3, and the lubrication groove contains solid lubricant to reduce rotational friction. The cavity diameter is 0.5-1mm larger than the outer diameter of the locking member 3 to ensure smooth rotation while avoiding radial wobble.

[0055] In this embodiment: the locking member 3 is a ring structure, with its outer wall fitting against the inner wall of the linkage cavity 106. Axial positioning is achieved through the ring retaining rings at both ends, and the locking member 3 can rotate synchronously within the linkage cavity 106.

[0056] In this embodiment, the linkage blocks 301 are evenly distributed along the radial inner wall of the locking member 3, and their number is completely matched with the auxiliary socket 203. Each linkage block 301 has a limiting part 302 at its end. The limiting part 302 adopts a wedge-shaped structure with a slope angle of 90°, which can be deeply fitted with the limiting cavity 207.

[0057] In this embodiment, the limiting cavity 207 is located in the middle section of the inner wall of the secondary socket 203, forming a 90-degree groove structure. The groove angle is perfectly matched with the inclined surface of the limiting part 302. The inner wall of the limiting cavity 207 is provided with anti-slip texture, which further enhances the vibration resistance after locking and prevents loosening during hard rock cutting.

[0058] See appendix Figure 5 - Appendix Figure 6 Appendix Figure 8 - Appendix Figure 10 The radial inner wall of the cutting tooth shank 1 is provided with a plurality of first slots 105 spaced apart, and the first slots 105 are threaded with connecting members 5; the linkage block 301 also includes a first inclined surface 303, and the connecting member 5 is used to press the first inclined surface 303 and trigger the locking member 3 to rotate.

[0059] In this embodiment: the first slots 105 are evenly distributed along the radial inner wall of the cutting tooth shank 1, and their number perfectly matches that of the linkage block 301. The inner wall of the first slots 105 is provided with internal threads, and the connector 5 adopts an external hexagonal bolt structure. The bolt head is provided with anti-slip knurling for easy tightening with special tools. The bolt end is machined with rounded corners to reduce contact friction with the first inclined surface 303.

[0060] In this embodiment: the first inclined surface 303 is set on the outer wall of the linkage block 301, the inclined surface angle is set to 25-30°, and the surface is quenched to achieve a hardness of HRC55-60, thereby enhancing wear resistance.

[0061] In this embodiment: After installing the cutting tooth head 2, the connector 5 is screwed into the first slot 105, and the end of the bolt gradually presses against the first inclined surface 303. Through the force decomposition effect of the inclined surface, the axial force of the connector 5 is converted into a tangential force that drives the locking member 3 to rotate. As the connector 5 is continuously tightened, the locking member 3 rotates synchronously, causing the limiting parts 302 of all linkage blocks 301 to embed into the limiting cavities 207 of the corresponding secondary sockets 203, thereby achieving linkage locking.

[0062] See appendix Figure 7 - Appendix Figure 10 The locking member 3 has multiple slots 305 spaced apart on its radial inner wall, which are used for the connecting member 5 to pass through. The linkage cavity 106 has multiple mounting plates 107 spaced apart on its inner wall, which are located in the slots 305. The mounting plate 107 is provided with a first reset member 108, the other end of which is connected to the locking member 3 and is used to drive the locking member 3 to return to its original position and unlock the secondary socket 203.

[0063] In this embodiment: the slots 305 are evenly distributed along the radial inner wall of the locking member 3, and their number is completely matched with that of the connecting member 5. The width of the slots 305 is 1-1.2mm larger than the diameter of the connecting member 5, ensuring that the connecting member 5 can freely pass through and slide along the slots 305. The mounting plate 107 is a rectangular metal plate, which is welded and fixed to the inner wall of the linkage cavity 106 and embedded in the slots 305. The thickness of the mounting plate 107 is 0.5mm less than the depth of the slots 305 to avoid interference with the locking member 3 when it rotates.

[0064] In this embodiment: the first reset member 108 adopts a torsion spring structure, with one end of the spring engaging in the reserved slot of the mounting plate 107 and the other end embedded in the spring slot of the locking member 3. The torsion spring ensures that it can provide sufficient reset force to drive the locking member 3 to unlock, while avoiding excessive reset force that would make it difficult to tighten the connecting member 5 when locking.

[0065] In this embodiment: During disassembly, the connector 5 is loosened by rotating it in the opposite direction, releasing the pressure on the first inclined surface 303. The torsional elastic force of the first reset member 108 drives the locking member 3 to rotate in the opposite direction, and the limiting part 302 slides out along the inclined surface of the limiting cavity 207, while simultaneously driving the slot 305 to slide along the mounting plate 107 until the locking member 3 returns to its original position, realizing automatic linkage unlocking without additional operation. The disassembly and assembly time of a single set of cutting teeth is controlled within 8 seconds.

[0066] See appendix Figure 7 - Appendix Figure 10 A positioning groove 304 is provided on the first inclined surface 303, which is used to accommodate the locking component 3.

[0067] In this embodiment, the positioning groove 304 is located at the end of the first inclined surface 303 and has a hemispherical groove structure. The diameter of the groove is 0.2-0.3 mm larger than the diameter of the end of the connector 5. The inner wall of the positioning groove 304 is carburized to achieve a hardness of HRC60-65, thereby enhancing its wear resistance and impact resistance.

[0068] In this embodiment: when the connector 5 is screwed into the first slot 105 and pressed against the first inclined surface 303, the bolt end slides along the inclined surface into the positioning groove 304, forming a dual locking mechanism of inclined surface driving and groove positioning. The positioning groove 304 can restrict the axial movement of the connector 5, and together with the preload of the anti-loosening washer, effectively counteract the high-frequency vibration during hard rock cutting, prevent the connector 5 from loosening, and ensure a stable locking state.

[0069] See appendix Figure 3 - Appendix Figure 6 and attached Figure 11 A pipe seat 103 is provided on the axial inner wall of the cutting tooth shank 1, and a positioning cavity 104 is provided on the axial inner wall of the pipe seat 103; a pipe cavity 204 is provided on the axial inner wall of the cutting tooth head 2, and a positioning seat 205 is provided on the axial inner wall of the pipe cavity 204; when the cutting tooth head 2 is installed on the cutting tooth shank 1, the pipe seat 103 is inserted into the pipe cavity 204, and the positioning seat 205 is inserted into the positioning cavity 104.

[0070] In this embodiment: the pipe seat 103 is a cylindrical boss structure, coaxially disposed on the axial inner wall of the cutting tooth shank 1. Its outer diameter is clearance-fitted with the inner diameter of the pipe cavity 204, with a tolerance controlled within 0.05-0.1mm. The positioning cavity 104 is a cylindrical groove, coaxially formed on the axial end face of the pipe seat 103. Its inner diameter is interference-fitted with the outer diameter of the positioning seat 205, with a tolerance controlled within -0.03 to -0.01mm to ensure accurate positioning.

[0071] In this embodiment: the positioning seat 205 is a cylindrical boss structure, coaxially disposed on the axial inner wall of the pipe cavity 204 of the cutting tooth head 2. Its outer diameter is adapted to the inner diameter of the positioning cavity 104, and the end is provided with a 15° chamfer to facilitate insertion. The pipe cavity 204 is a cylindrical cavity, the inner diameter of which is adapted to the outer diameter of the pipe seat 103, and the depth of the cavity is greater than the height of the pipe seat 103, reserving a sealing compression space.

[0072] In this embodiment: when installing the cutting tooth head 2, the main socket 202 is inserted into the main socket 101, and the auxiliary socket 203 is simultaneously inserted into the auxiliary socket 102. At the same time, the pipe seat 103 is inserted into the pipe cavity 204, and the positioning seat 205 is inserted into the positioning cavity 104, achieving preliminary positioning and pipe connection.

[0073] See appendix Figure 9 - Appendix Figure 11The high-efficiency drilling hard rock cutting tool also includes a blocking component 4, which is slidably disposed between the radial inner wall of the pipeline cavity 204 and the radial outer wall of the positioning seat 205; the blocking component 4 is used to control the opening and closing of the nozzle inside the cutting tool handle 1 and the cutting tool head 2.

[0074] In this embodiment: the shielding component 4 adopts an annular sliding sleeve structure, which is slidably assembled in the annular gap between the radial inner wall of the pipeline cavity 204 and the radial outer wall of the positioning seat 205. The sliding sleeve is 10-15mm thick, with a clearance fit between the inner wall and the outer wall of the positioning seat 205, and a sliding fit between the outer wall and the inner wall of the pipeline cavity 204, ensuring smooth sliding without jamming. 5-8 flow holes are evenly opened circumferentially on the shielding component 4, with the hole diameter consistent with the nozzle channel diameter, for fluid conduction.

[0075] See appendix Figure 9 - Appendix Figure 11 The inside of the cutting tooth handle 1 is provided with a nozzle network, which includes a plurality of second nozzles 112 penetrating the axial inner wall of the pipe seat 103; a plurality of fourth nozzles 206 are spaced apart on the axial inner wall of the pipe cavity 204, and the second nozzles 112 and the fourth nozzles 206 are staggered; a plurality of third nozzles 401 are provided on the shielding member 4, and when the shielding member 4 is in contact with the axial inner wall of the pipe cavity 204, the third nozzles 401 are connected to the fourth nozzles 206; when the shielding member 4 is in contact with the axial inner wall of the pipe seat 103, the shielding member 4 blocks the plurality of second nozzles 112.

[0076] In this embodiment: the nozzle network of the cutting tooth shank 1 includes multiple second nozzles 112 penetrating the axial inner wall of the pipe seat 103. The second nozzles 112 are evenly distributed circumferentially along the pipe seat 103, with a quantity of 4-6, an orifice diameter of 3-5 mm, and an outlet end flush with the axial end face of the pipe seat 103. Multiple fourth nozzles 206 are spaced apart on the axial inner wall of the pipe cavity 204. The number of fourth nozzles 206 is the same as that of the second nozzles 112, with the same orifice diameter, and they are evenly distributed circumferentially along the pipe cavity 204. They are also staggered from the second nozzles 112 to ensure that fluid cannot be directly conducted.

[0077] In this embodiment: the fourth nozzle 206 extends to the vicinity of the alloy cutter head 201 of the cutting tooth head 2, and the outlet end is machined into an angle of 30-45° so that the high-pressure fluid injection direction is close to the cutting surface, thereby enhancing the cooling and lubrication effect.

[0078] In this embodiment, a plurality of third nozzles 401 are evenly distributed along the circumference of the shielding member 4. The number and diameter of the third nozzles 401 are completely consistent with those of the second nozzle 112 and the fourth nozzle 206, and their circumferential positions precisely correspond to those of the fourth nozzle 206. When the shielding member 4 is in contact with the axial inner wall of the pipeline cavity 204, i.e., the top, the third nozzles 401 and the fourth nozzle 206 are completely connected. When the shielding member 4 is in contact with the axial inner wall of the pipeline seat 103, i.e., the bottom, the solid part of the shielding member 4 completely covers the outlet of the second nozzle 112, achieving shielding and sealing.

[0079] See appendix Figure 4 Appendix Figure 6 and attached Figure 11 The inner wall of the main socket 202 is provided with a plurality of second slots 208 communicating with the first slot 105, and the radial outer wall of the shield 4 is provided with a plurality of second inclined surfaces 404; when the connector 5 presses the second inclined surface 404, the shield 4 moves toward the cutting tooth head 2 along the radial inner wall of the pipe cavity 204; the axial outer wall of the shield 4 facing the cutting tooth handle 1 is provided with a plurality of mounting slots 402, and a second reset member 403 is provided in the mounting slot 402, and the second reset member 403 is connected to the pipe seat 103.

[0080] In this embodiment: the second slots 208 are evenly distributed circumferentially along the inner wall of the main socket 202, and their number is completely matched with the first slots 105 and the connector 5. The diameter of the slots is 0.1-0.2mm larger than the diameter of the connector 5, ensuring that the connector 5 can freely pass through and slide along the slots. The second slots 208 and the first slots 105 are coaxially aligned to form a continuous channel that passes through the cutting tooth handle 1 and the main socket 202, which facilitates the simultaneous action of the locking member 3 and the blocking member 4 when the connector 5 is installed.

[0081] In this embodiment: the second inclined surface 404 is provided on the radial outer wall of the shield 4, and is evenly distributed along the circumference. The number is the same as that of the connector 5. The angle of the inclined surface is set to 25-30°. The surface is hardened to enhance wear resistance.

[0082] In this embodiment: when the connector 5 is screwed into the first slot 105 and passes through the second slot 208, the end of the bolt presses against the second inclined surface 404. Through the force decomposition effect of the inclined surface, the axial force of the connector 5 is converted into a tangential force that drives the shield 4 to move along the radial inner wall of the pipeline cavity 204 toward the cutting tooth head 2.

[0083] In this embodiment, the second reset member 403 adopts a compression spring structure. One end of the spring is embedded in the mounting groove 402 of the shield 4, and the other end is connected to the axial end face of the pipe seat 103. Pressing the second reset member 403 ensures that it can provide sufficient reset force to drive the shield 4 to reset, while avoiding excessive reset force that would make it difficult to tighten the connector 5.

[0084] In this embodiment: When installing the cutting tooth 2, the main socket 202 is inserted into the main socket 101, the auxiliary socket 203 is inserted into the auxiliary socket 102, the pipe seat 103 is inserted into the pipe cavity 204, and the positioning seat 205 is inserted into the positioning cavity 104. The connecting piece 5 is tightened, with the bolt end sequentially penetrating the first slot 105 and the second slot 208, simultaneously pressing the first inclined surface 303 of the linkage block 301 and the second inclined surface 404 of the blocking piece 4. The first inclined surface 303, under force, drives the locking piece 3 to overcome the torsional resistance of the first reset piece 108 and rotate. The limiting part 302 is embedded in the limiting cavity 207 of the auxiliary socket 203, achieving linkage locking. Simultaneously, the second inclined surface 404, under force, drives the blocking piece 4 to overcome the elasticity of the second reset piece 403 and move towards the cutting tooth 2 along the radial inner wall of the pipe cavity 204.

[0085] When the locking member 3 is fully locked, the blocking member 4 slides to a position that fits against the inner wall of the top of the pipeline cavity 204. At this time, the third nozzle 401 and the fourth nozzle 206 are precisely aligned and connected. Because the second nozzle 112 is misaligned with the fourth nozzle 206, the high-pressure fluid is sprayed onto the cutting surface through the second nozzle 112, the third nozzle 401, and the fourth nozzle 206 to achieve cooling and lubrication.

[0086] See appendix Figure 6 and attached Figure 10 The nozzle network also includes an inlet 109 at the bottom of the cutting tooth handle 1, and a plurality of first nozzles 110 connected to the inlet 109; the nozzle network also includes a premixing chamber 111 inside the cutting tooth handle 1, and a plurality of second nozzles 112 are connected to the premixing chamber 111; the cutting tooth head 2 also includes an alloy cutter head 201.

[0087] In this embodiment: the inlet 109 is located at the center of the bottom of the cutting tooth handle 1, with a diameter of 8-10 mm, and is connected by an internal thread for easy connection with a high-pressure fluid delivery pipeline. Multiple first nozzles 110 are evenly distributed circumferentially along the cutting tooth handle 1, numbering 4-6, with a diameter of 5-6 mm. One end of each nozzle communicates with the inlet 109, and the other end extends to the premixing chamber 111, used to evenly deliver the high-pressure fluid to the premixing chamber 111.

[0088] In this embodiment: the premixing chamber 111 is an annular cavity, opened inside the cutting tooth stalk 1, located between the first nozzle 110 and the second nozzle 112, with a depth of 5-8mm. The inner wall of the premixing chamber 111 adopts a streamlined design to reduce fluid resistance, so that the high-pressure fluid entering from the first nozzle 110 is fully and evenly mixed in the cavity, avoiding insufficient local injection pressure due to uneven fluid distribution.

[0089] In this embodiment: the alloy cutter head 201 is made of tungsten cobalt cemented carbide, such as YG13C, with a Rockwell hardness of HRA88-93, which has extremely high wear resistance and compressive strength. It is fixed to the end of the cutting tooth head 2 by high-temperature brazing process, with a welding strength ≥80MPa, to ensure that it does not fall off during hard rock cutting.

[0090] A wear-resistant alloy weld overlay is provided at the root of the alloy cutter head 201. The weld overlay material is tungsten carbide alloy with a thickness of 3-5mm and a hardness of HRC60-65. This layer is used to protect the welded parts of the alloy cutter head 201 and prevent the cutter head from falling off due to wear.

[0091] The end of the cutting tooth 2 adopts a streamlined design to reduce resistance during the cutting process. At the same time, a tungsten carbide coating with a thickness of 0.5-1mm is sprayed on the end surface to further improve wear resistance and extend the service life of the cutting tooth 2.

[0092] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and inventive features disclosed herein.

Claims

1. A high-efficiency drilling hard rock cutting tool, characterized in that, include: The cutting tooth head (2) includes a main socket (202) and a plurality of secondary sockets (203) located around the main socket (202); The cutting tooth shank (1) includes a main insertion cavity (101) opened on the inner wall of the axial direction, and a plurality of secondary insertion cavities (102) located around the main insertion cavity (101). The main socket (202) is inserted into the main socket cavity (101), and the auxiliary socket (203) is inserted into the auxiliary socket cavity (102); a locking member (3) is rotatably provided in the cutting tooth handle (1), and the locking member (3) is used to lock the multiple auxiliary sockets (203); The cutting tooth handle (1) has a linkage cavity (106) inside that communicates with multiple auxiliary insertion cavities (102), and the locking member (3) is rotatably disposed in the linkage cavity (106); A limiting cavity (207) is formed on the inner wall of the auxiliary socket (203), and a linkage block (301) is provided at intervals on the radial inner wall of the locking member (3) corresponding to a plurality of auxiliary sockets (203). The linkage block (301) includes a limiting part (302); in the corresponding linkage block (301) and auxiliary socket (203), the limiting part (302) is used to lock the limiting cavity (207); The radial inner wall of the cutting tooth shank (1) is provided with a plurality of first slots (105) spaced apart, and the first slots (105) are threaded with connectors (5). The linkage block (301) also includes a first inclined surface (303), and the connector (5) is used to press the first inclined surface (303) and trigger the locking member (3) to rotate; The locking member (3) has a plurality of slots (305) spaced apart on its radial inner wall, the slots (305) being used for the connecting member (5) to pass through; the linkage cavity (106) has a plurality of mounting plates (107) spaced apart on its inner wall, the mounting plates (107) being located in the slots (305). The mounting plate (107) is provided with a first reset member (108), the other end of which is connected to the locking member (3) to drive the locking member (3) back to its original position and unlock the secondary socket (203).

2. The high-efficiency drilling hard rock cutting tool according to claim 1, characterized in that, A positioning groove (304) is provided on the first inclined surface (303), and the positioning groove (304) is used to accommodate the locking member (3).

3. The high-efficiency drilling hard rock cutting tool according to claim 1, characterized in that, The cutting tooth handle (1) is provided with a pipe seat (103) on its axial inner wall, and a positioning cavity (104) is provided on the axial inner wall of the pipe seat (103); the cutting tooth head (2) is provided with a pipe cavity (204) on its axial inner wall, and a positioning seat (205) is provided on the axial inner wall of the pipe cavity (204). When the cutting tooth head (2) is installed on the cutting tooth handle (1), the pipe seat (103) is inserted into the pipe cavity (204), and the positioning seat (205) is inserted into the positioning cavity (104).

4. The high-efficiency drilling hard rock cutting tool according to claim 3, characterized in that, The high-efficiency drilling hard rock cutting tool also includes a shielding member (4), which is slidably disposed between the radial inner wall of the pipeline cavity (204) and the radial outer wall of the positioning seat (205). The shield (4) is used to control the opening and closing of the nozzle inside the cutting tooth handle (1) and the cutting tooth head (2).

5. The high-efficiency drilling hard rock cutting tool according to claim 4, characterized in that, The cutting tooth handle (1) has a nozzle network inside, which includes a plurality of second nozzles (112) penetrating the axial inner wall of the pipe seat (103); a plurality of fourth nozzles (206) are spaced apart on the axial inner wall of the pipe cavity (204), and the second nozzles (112) and the fourth nozzles (206) are offset; a plurality of third nozzles (401) are provided on the shielding member (4). When the shielding member (4) is in contact with the axial inner wall of the pipeline cavity (204), the third nozzle (401) is connected to the fourth nozzle (206); when the shielding member (4) is in contact with the axial inner wall of the pipeline seat (103), the shielding member (4) shields multiple second nozzles (112).

6. The high-efficiency drilling hard rock cutting tool according to claim 5, characterized in that, The inner wall of the main socket (202) is provided with a plurality of second slots (208) that communicate with the first slot (105), and the outer wall of the shield (4) is provided with a plurality of second inclined surfaces (404). When the connector (5) presses against the second inclined surface (404), the shield (4) moves toward the cutting head (2) along the radial inner wall of the pipeline cavity (204); And / or, the shielding member (4) has a plurality of mounting grooves (402) on the axial outer wall facing the cutting tooth shank (1), and a second reset member (403) is provided in the mounting groove (402), and the second reset member (403) is connected to the pipe seat (103).

7. The high-efficiency drilling hard rock cutting tool according to claim 5, characterized in that, The nozzle network also includes an inlet (109) at the bottom of the cutting tooth handle (1) and a plurality of first nozzles (110) communicating with the inlet (109); the nozzle network also includes a premixing chamber (111) inside the cutting tooth handle (1), and a plurality of second nozzles (112) communicating with the premixing chamber (111). And / or, the cutting head (2) also includes an alloy cutting head (201).

Images