Roller bit with anti-blocking structure

Abstract

The invention discloses a roller bit with an anti-blocking structure, and relates to the technical field of roller bits. When the cones clamp the rock during rotation and drive the rock to enter the space between the cones, rotation of the cones is blocked and cannot rotate, and crushing of the rock is affected, according to the roller bit with the anti-clamping structure, through cooperation of the cone tooth blocks and the cushion blocks, in the rotation process, the depth of the rock penetrating into the space between the cone tooth blocks is limited through the cushion blocks, and therefore the rock is prevented from being damaged. Meanwhile, when the cushion blocks make contact with the rock, the cone tooth blocks are assisted to crush the rock, the drilling crushing effect is guaranteed, meanwhile, the cushion blocks are matched with the cone tooth blocks in an outer diameter change mode, and the situation that in the crushing process, the rock fragments are clamped between the cone tooth blocks, rotate along with cone cones in the rotating process and are clamped into a drill bit, rotation between cone mechanisms is blocked, and the service life of the cone mechanisms is prolonged is avoided. And the rock crushing work cannot be effectively carried out in the drilling process.

Description

Technical Field

[0001] The present invention relates to the technical field of roller cone bits, and particularly to a roller cone bit with an anti-jamming structure. Background Art

[0002] The roller cone bit is one of the most widely used drilling bits, mainly composed of a housing, tooth jaws, roller cones, bearings, nozzles, an oil storage and sealing compensation system, etc. The roller cones are generally manufactured by die forging of alloy steel and are the main working components of the roller cone bit. Cutting teeth are provided on the roller cones, and the rocks are broken by rotation and rolling. The number of roller cones is usually a single roller cone, three roller cones or assembled multiple roller cones, among which the three-roller cone bit is the most commonly used. During the rolling process of the roller cones, they alternately contact the bottom of the well with single teeth and double teeth, and the position of the center of the roller cones is sometimes high and sometimes low, causing longitudinal vibration of the bit. At the same time, the weight on bit borne by the bit acts on the rocks through the teeth, breaking the rocks. The contact area between the teeth of the roller cone bit and the bottom of the well is small, and the specific pressure is high, making it easy to penetrate into the formation, thus achieving the effect of crushing the rocks. When the roller cone bit is working, it needs to continuously penetrate deep into the ground and break the rock and soil by the rotation of the roller cones. During the breaking process, when the roller cones rotate and jam the rocks and drive the rocks into the space between the roller cones, the rotation of the roller cones will be blocked and unable to rotate, affecting the breaking of the rocks. Summary of the Invention

[0003] To achieve the above objectives, the present invention is realized through the following technical solutions: A roller cone bit with an anti-jamming structure, comprising: A connection mechanism for connecting the drill rig shaft to transmit the power of the drill rig to the bit; A support mechanism installed at the bottom of the connection mechanism, and a seal is formed between the support mechanism and the connection mechanism; A roller cone mechanism evenly installed at the bottom of the support mechanism and used for breaking the rock and soil during drilling; The cone bit mechanism includes a fixed shaft, which is fixedly installed on the inner wall of the support mechanism. A conical roller is rotatably installed on the outer side of the fixed shaft. The outer side of the conical roller is a conical surface, and a convex plate is fixedly installed on the conical surface of the conical roller. The convex plates are evenly installed along the central position of the axis of the conical roller. A cushion block is fixedly installed on the outer side of the conical roller, and the cushion block is located between the convex plates. Through the cooperation of the cone blocks and the cushion blocks, during rotation, the depth of the rock penetrating between the cone blocks is restricted by the cushion blocks. At the same time, when the cushion blocks contact the rock, they assist the cone blocks to break the rock. While ensuring the drilling and crushing effect, the outer diameter changes of the cushion blocks and the cone blocks are coordinated to prevent rock fragments from getting stuck between the cone blocks during the crushing process. During rotation, they rotate with the conical roller and get stuck inside the drill bit, causing the rotation between the cone bit mechanisms to be blocked and unable to effectively carry out rock crushing work during drilling. A cone block is fixedly installed on the outer side of the convex plate, and the outer diameter of the cone block gradually decreases as it moves away from the convex plate.

[0004] Preferably, the distance from the end of the cone block away from the conical roller to the outer side of the conical roller is greater than the distance from the end of the cushion block away from the conical roller to the outer side of the conical roller. The side of the conical roller close to the support mechanism is an arc surface with a central protrusion. A shaft groove is opened on the inner wall of the conical roller, and bearings are fixedly installed at both ends of the shaft groove of the conical roller. The inner wall of the bearing contacts the outer side of the fixed shaft. An arc convex block is fixedly installed at the central position of the shaft groove of the conical roller. Through the cooperation of the arc convex block and the bearing, the contact area with the fixed shaft is reduced, the rotation resistance of the conical roller is reduced, and the crushing effect is improved. At the same time, the arc surface of the conical roller cooperates with the arc surface of the shaft hole plate to provide support for the conical roller, preventing the fixed shaft from bending under the drilling pressure and affecting the rotation of the roller bit. The arc convex blocks are evenly installed along the center position of the conical roller, and the opposite surfaces of the arc convex blocks contact the outer side of the fixed shaft.

[0005] Preferably, the connection mechanism includes a connecting stud. Threads are provided on the outer side of the connecting stud, and a guide groove is opened at the central position of the top of the connecting stud. A connecting disc is fixedly installed at the bottom of the connecting stud. Screw holes are evenly opened on the outer side of the connecting disc, and bolts are threadedly connected to the screw holes of the connecting disc. The connecting disc is fixedly connected to the support mechanism through the bolts. A ring groove is opened at the bottom of the connecting disc, and a sealing washer is clamped at the ring groove of the connecting disc. Through the cooperation of the ring groove of the connecting disc and the inner convex ring of the sealing washer, the inner convex ring is inserted into the ring groove of the connecting disc and squeezes the sealing washer, positioning the connection position while increasing the tortuosity of the path for the internal water to overflow outward and improving the sealing effect. A snap ring is fixedly installed at the bottom of the connecting disc, and a sieve hole cover is fixedly installed at the bottom of the snap ring. The sieve hole cover is located inside the sealing washer.

[0006] Preferably, the support mechanism includes a fixed disk, on the top of which an inner convex ring is fixedly installed. The inner convex ring is adapted to the annular groove of the connecting disk, and the top of the inner convex ring is in close contact with the bottom of the sealing washer. On the bottom of the fixed disk, a shaft hole plate is fixedly installed. The shaft hole plates are evenly installed along the center position of the fixed disk, and the opposite surfaces of the shaft hole plates are arc surfaces sunken at the center position. The arc surface of the shaft hole plate is adapted to the arc surface of the tapered cone gear.

[0007] Preferably, an inner spray hole is opened at the center position of the bottom of the fixed disk, and inclined spray grooves are evenly opened at the bottom of the fixed disk. The inclined spray grooves are inclined inward from bottom to top. Convex blocks are evenly arranged at the edge position of the bottom of the fixed disk, and the convex blocks are located between the shaft hole plates. When spraying, the inner spray hole cooperates with the outer spray grooves to vertically impact the rock breaking surface, impact the soil and the broken rock debris, so that the unbroken rocks are exposed, contact the cone gear mechanism for breaking. At the same time, the inclined spray grooves cooperate with the side spray grooves to impact the cone gear mechanism. During the rotation of the cone gear mechanism, the soil adhered to its surface is cleaned, avoiding a large amount of crushed stones adhering to the soil surface and getting stuck between the cone gear mechanisms, resulting in the rotation of the cone gear mechanism being blocked. An outer spray groove is opened at the bottom of the convex block of the fixed disk, and side spray grooves are opened on the opposite surfaces of the convex blocks.

[0008] The present invention provides a cone bit with an anti - jamming structure, having the following beneficial effects: First, for the cone bit with an anti - jamming structure, through the cooperation of the tapered cone blocks and the cushion blocks, during the rotation process, the depth of the rock penetrating between the tapered cone blocks is restricted by the cushion blocks. At the same time, when the cushion blocks contact the rock, they assist the tapered cone blocks to break the rock. While ensuring the drilling and breaking effect, the outer diameter changes of the cushion blocks and the tapered cone blocks cooperate to avoid rock fragments getting stuck between the tapered cone blocks during the breaking process and being caught inside the drill bit as they rotate with the tapered cone gear during the rotation, causing the rotation between the cone gear mechanisms to be blocked and unable to effectively carry out rock breaking work during the drilling process.

[0009] Second, for the cone bit with an anti - jamming structure, through the cooperation of the arc convex blocks and the bearings, the contact area with the fixed shaft is reduced, the rotation resistance of the tapered cone gear is reduced, and the breaking effect is improved. At the same time, the arc surface of the tapered cone gear cooperates with the arc surface of the shaft hole plate to provide support for the tapered cone gear, avoiding the fixed shaft being bent under the drilling pressure and affecting the rotation of the cone gear.

[0010] Third, for the cone bit with an anti - jamming structure, through the cooperation of the annular groove of the connecting disk and the sealing washer with the inner convex ring, the inner convex ring is clamped into the annular groove of the connecting disk and squeezes the sealing washer. While positioning the connection position, the tortuosity of the path for the internal water to overflow outward is increased, improving the sealing effect.

[0011] IV. The roller bit with an anti-jamming structure impacts the rock and soil breaking surface vertically downward through the cooperation of the inner spray holes and the outer spray grooves, impacts the soil and the broken rock debris, causes the unbroken rocks to leak out, contacts the roller mechanism for breaking, and at the same time, the inclined spray grooves cooperate with the side spray grooves to impact the roller mechanism. During the rotation of the roller mechanism, the soil adhered to its surface is cleaned to prevent a large amount of crushed stones from adhering to the soil surface and getting stuck between the roller mechanisms, resulting in the obstruction of the rotation of the roller mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 FIG. is a schematic structural view of a roller bit with an anti-jamming structure according to the present invention; Figure 2 FIG. is a side view of the structure of a roller bit with an anti-jamming structure according to the present invention; Figure 3 FIG. is a schematic structural view of the roller mechanism of the present invention; Figure 4 FIG. is a sectional view of the structure of the roller mechanism of the present invention; Figure 5 FIG. is a schematic structural view of the connecting mechanism of the present invention; Figure 6 FIG. is a sectional view of the structure of the connecting mechanism of the present invention; Figure 7 FIG. is a schematic structural view of the supporting mechanism of the present invention; Figure 8 FIG. is a sectional view of the structure of the supporting mechanism of the present invention; Figure 9 FIG. is a bottom-up sectional view of the structure of the supporting mechanism of the present invention.

[0013] In the figure: 1. Connecting mechanism; 2. Supporting mechanism; 3. Roller mechanism; 11. Connecting stud; 12. Connecting plate; 13. Bolt; 14. Snap ring; 15. Sealing gasket; 16. Screen hole cover; 21. Fixed plate; 22. Inner convex ring; 23. Axial hole plate; 24. Inner spray hole; 25. Inclined spray groove; 26. Side spray groove; 27. Outer spray groove; 31. Fixed shaft; 32. Spacer block; 33. Convex plate; 34. Tapered tooth block; 35. Tapered roller; 36. Bearing; 37. Arc convex block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0015] The first embodiment is as Figures 1 to 4 shown. The present invention provides a technical solution: A roller bit with an anti-jamming structure, comprising: A connecting mechanism 1, which is used to connect the drill rig shaft and transmit the power of the drill rig to the bit; A supporting mechanism 2, which is installed at the bottom of the connecting mechanism 1, and a seal is formed between the supporting mechanism 2 and the connecting mechanism 1; A roller mechanism 3, which is evenly installed at the bottom of the supporting mechanism 2, and the roller mechanism 3 is used to crush rock and soil during drilling; The roller mechanism 3 includes a fixed shaft 31, the fixed shaft 31 is fixedly installed on the inner wall of the supporting mechanism 2, and a tapered roller 35 is rotatably installed on the outer side of the fixed shaft 31. The outer side of the tapered roller 35 is a tapered surface, and a convex plate 33 is fixedly installed on the tapered surface of the tapered roller 35. The convex plates 33 are evenly installed along the central position of the axis of the tapered roller 35. A cushion block 32 is fixedly installed on the outer side of the tapered roller 35. Through the connection between the fixed shaft 31 and the supporting mechanism 2, the fixed shaft 31 is driven to rotate along the central axis of the drill shaft. During the rotation, the tapered teeth 34 on the surface of the tapered roller 35 contact the rock and soil through the cushion block 32, and during the rotation, through the frictional force with the rock and soil, the tapered roller 35 rotates along the central axis of the fixed shaft 31 under the restriction of the fixed shaft 31, so that the tapered teeth 34 cooperate with the cushion block 32 to alternately contact the rock and soil. The interval between the tapered teeth 34, during the rotation, the drilling pressure borne by the bit acts on the rock through the tapered teeth 34. At the same time, the central position of the tapered roller 35 is sometimes high and sometimes low, generating a longitudinal vibration and generating an impact force to break the rock. The cushion block 32 is located between the convex plates 33. The outer side of the convex plate 33 is fixedly installed with tapered teeth 34, and the outer diameter of the tapered teeth 34 gradually decreases in the process of gradually moving away from the convex plate 33.

[0016] The distance from the end of the tapered tooth 34 away from the tapered roller 35 to the outer side of the tapered roller 35 is greater than the distance from the end of the cushion block 32 away from the tapered roller 35 to the outer side of the tapered roller 35. The side of the tapered roller 35 close to the supporting mechanism 2 is an arc surface with a central position protruding. A shaft groove is provided on the inner wall of the tapered roller 35, and bearings 36 are fixedly installed at both ends of the shaft groove of the tapered roller 35. During the crushing process, the depth of the rock penetrating between the tapered teeth 34 is restricted by the cushion block 32. At the same time, when the cushion block 32 contacts the rock, it assists the tapered teeth 34 to break the rock. The inner wall of the bearing 36 contacts the outer side of the fixed shaft 31. An arc convex block 37 is fixedly installed at the central position of the shaft groove of the tapered roller 35. The arc convex blocks 37 are evenly installed along the center position of the tapered roller 35, and the opposite surfaces of the arc convex blocks 37 contact the outer side of the fixed shaft 31.

[0017] Second embodiment, on the basis of the first embodiment, please refer to Figures 5 to 6As shown, the connecting mechanism 1 includes a connecting stud 11. The outer side of the connecting stud 11 is provided with threads, and a guide groove is opened at the center position of the top of the connecting stud 11. A connecting disc 12 is fixedly installed at the bottom of the connecting stud 11. Screw holes are evenly opened on the outer side of the connecting disc 12. By connecting the connecting stud 11 with the drill shaft of the drill, the power of the drill is transmitted to the drill bit through the connection of the connecting stud 11. At the same time, the guide groove provides a path for the water to be introduced, so that the water can enter the space between the connecting disc 12 and the supporting mechanism 2 from the guide groove. And a bolt 13 is threadedly connected to the screw hole of the connecting disc 12. The connecting disc 12 is fixedly connected to the supporting mechanism 2 through the bolt 13. A ring groove is opened at the bottom of the connecting disc 12, and a sealing washer 15 is clamped at the ring groove of the connecting disc 12. A snap ring 14 is fixedly installed at the bottom of the connecting disc 12. The ring groove at the bottom of the connecting disc 12 cooperates with the sealing washer 15 to form a seal between the outer side of the water flow space and the supporting mechanism 2. After the water is introduced, under the dual action of its own gravity and water pressure, it flows downward, passes through the sieve hole cover 16, and the water is filtered through the sieve hole cover 16 to prevent hard objects with a larger volume from blocking the water spraying path. The sieve hole cover 16 is fixedly installed at the bottom of the snap ring 14, and the sieve hole cover 16 is located inside the sealing washer 15.

[0018] The third embodiment is based on the first and second embodiments. Please refer to Figures 7 to 9 As shown, the supporting mechanism 2 includes a fixed disc 21. An inner convex ring 22 is fixedly installed at the top of the fixed disc 21. The inner convex ring 22 is adapted to the ring groove of the connecting disc 12, and the top of the inner convex ring 22 is closely attached to the bottom of the sealing washer 15. A shaft hole plate 23 is fixedly installed at the bottom of the fixed disc 21. The shaft hole plates 23 are evenly installed along the center position of the fixed disc 21. By cooperating with the connecting mechanism 1, during connection, the inner convex ring 22 is snapped into the ring groove of the connecting disc 12 and presses the sealing washer 15. While positioning the connection position, it increases the tortuosity of the path for the internal water to overflow outward, improving the sealing effect. After the water passes through the sieve hole cover 16, it diffuses inside the fixed disc 21 and is sprayed out through the inner spray holes 24, the inclined spray grooves 25, the side spray grooves 26 and the outer spray grooves 27. And the opposite surfaces of the shaft hole plates 23 are arc surfaces sunken at the center position. The arc surfaces of the shaft hole plates 23 are adapted to the arc surfaces of the tapered cone gears 35.

[0019] At the central position of the bottom of the fixed disk 21, an inner spray hole 24 is provided, and inclined spray grooves 25 are evenly arranged at the bottom of the fixed disk 21. The inclined spray grooves 25 are inclined inward from bottom to top. When spraying, the inner spray hole 24 cooperates with the outer spray groove 27 to vertically impact the rock and soil breaking surface, impact the soil and the broken rock debris, so that the unbroken rocks are exposed and contact the roller mechanism 3 for breaking. At the same time, the inclined spray grooves 25 cooperate with the side spray grooves 26 to impact the roller mechanism 3. During the rotation of the roller mechanism 3, the soil adhered to its surface is cleaned. At the edge position of the bottom of the fixed disk 21, bumps are evenly arranged, and the bumps are located between the shaft hole plates 23. The bottom of the bumps of the fixed disk 21 is provided with outer spray grooves 27, and side spray grooves 26 are arranged on the opposite surfaces of the bumps.

[0020] During use, the roller bit is connected to the drill shaft of the drill through the connecting mechanism 1, so that the drill drives the roller bit to rotate through the drill shaft. During the rotation, the support mechanism 2 cooperates with the connecting mechanism 1 to drive the roller mechanism 3 to rotate along the central axis of the drill shaft, and the rock and soil are broken by the roller assembly. At the same time, the water in the drill is introduced into the support mechanism 2 and the connecting mechanism 1 through the drill shaft, and during the drilling process, the support mechanism 2 sprays water to impact the crushed rock and soil, driving the crushed rock and soil to gush out of the drill hole.

[0021] In the roller mechanism 3, during drilling, through the connection between the fixed shaft 31 and the support mechanism 2, the fixed shaft 31 is driven to rotate along the central axis of the drill shaft. During the rotation, the conical tooth blocks 34 on the surface of the conical roller 35 contact the rock and soil with the cushion blocks 32, and during the rotation, due to the friction force with the rock and soil, the conical roller 35 rotates along the central axis of the fixed shaft 31 under the restriction of the fixed shaft 31, so that the conical tooth blocks 34 cooperate with the cushion blocks 32 to alternately contact the rock and soil. The interval between the conical tooth blocks 34, during the rotation, the drilling pressure borne by the drill bit acts on the rock through the conical tooth blocks 34. At the same time, the central position of the conical roller 35 is sometimes high and sometimes low, generating a longitudinal vibration and generating an impact force to break the rock. During the breaking process, the depth of the rock penetrating between the conical tooth blocks 34 is restricted by the cushion blocks 32. At the same time, when the cushion blocks 32 contact the rock, they assist the conical tooth blocks 34 to break the rock.

[0022] In the connecting mechanism 1, it is connected to the drill shaft of the drill through the connecting stud 11, so that the power of the drill is transmitted to the drill bit through the connection of the connecting stud 11. At the same time, the guide groove provides a path for the water to be introduced, so that the water can enter the space between the connecting disk 12 and the support mechanism 2 through the guide groove. At the same time, the annular groove at the bottom of the connecting disk 12 cooperates with the sealing gasket 15 to form a seal between the outer side of the water flow space and the support mechanism 2. After the water is introduced, under the dual action of its own gravity and water pressure, it flows downward, passes through the sieve hole cover 16, and the water is filtered by the sieve hole cover 16 to prevent larger hard objects from blocking the water spraying path.

[0023] In the support mechanism 2, when connected by cooperating with the connection mechanism 1, during connection, the inner convex ring 22 snaps into the annular groove of the connection disk 12 and presses against the sealing washer 15. While positioning the connection position, it increases the tortuosity of the path for the internal water to overflow outward, improving the sealing effect. After the water passes through the sieve hole cover 16, it diffuses inside the fixed disk 21 and is ejected from the inner spray holes 24, inclined spray grooves 25, side spray grooves 26, and outer spray grooves 27. When ejected, the inner spray holes 24 cooperate with the outer spray grooves 27 to vertically impact the rock-breaking surface, impacting the soil and the broken rock debris, exposing the unbroken rocks, which then come into contact with the cone bit mechanism 3 for breaking. At the same time, the inclined spray grooves 25 cooperate with the side spray grooves 26 to impact the cone bit mechanism 3, and during the rotation of the cone bit mechanism 3, the soil adhering to its surface is cleaned up.

[0024] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not explicitly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the said element.

[0025] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A roller bit with an anti-jamming structure, characterized in that, Comprising: A connecting mechanism (1) for connecting the drill shaft to transmit the power of the drill to the drill bit; A supporting mechanism (2) installed at the bottom of the connecting mechanism (1), and a seal is formed between the supporting mechanism (2) and the connecting mechanism (1); A cone bit mechanism (3) evenly installed at the bottom of the supporting mechanism (2) for crushing rock and soil during drilling; The cone bit mechanism (3) includes a fixed shaft (31) fixedly installed on the inner wall of the supporting mechanism (2). A tapered cone bit (35) is rotatably installed on the outer side of the fixed shaft (31). The outer side of the tapered cone bit (35) is a conical surface, and a convex plate (33) is fixedly installed on the conical surface of the tapered cone bit (35). The convex plates (33) are evenly installed along the central axis position of the tapered cone bit (35). A spacer block (32) is fixedly installed on the outer side of the tapered cone bit (35), and the spacer block (32) is located between the convex plates (33). A tapered cone block (34) is fixedly installed on the outer side of the convex plate (33), and the outer diameter of the tapered cone block (34) gradually decreases in the process of gradually moving away from the convex plate (33).

2. The roller bit with an anti-jamming structure according to claim 1, characterized in that: The distance from the end of the tapered cone block (34) away from the tapered cone bit (35) to the outer side of the tapered cone bit (35) is greater than the distance from the end of the spacer block (32) away from the tapered cone bit (35) to the outer side of the tapered cone bit (35). The side of the tapered cone bit (35) close to the supporting mechanism (2) is an arc surface with a central protrusion.

3. The cone bit with an anti-jamming structure according to claim 2, characterized in that: Axial grooves are formed in the inner wall of the tapered cone bit (35), and bearings (36) are fixedly installed at both ends of the axial grooves of the tapered cone bit (35). The inner wall of the bearing (36) is in contact with the outer side of the fixed shaft (31).

4. The cone bit with an anti-jamming structure according to claim 3, wherein: An arc convex block (37) is fixedly installed at the central position of the axial groove of the tapered cone bit (35). The arc convex blocks (37) are evenly installed along the center position of the tapered cone bit (35), and the opposite surfaces of the arc convex blocks (37) are in contact with the outer side of the fixed shaft (31).

5. The cone bit with an anti-jamming structure according to claim 4, characterized in that: The connecting mechanism (1) includes a connecting stud (11) with threads on its outer side. A guide groove is formed at the central position of the top of the connecting stud (11), and a connecting disc (12) is fixedly installed at the bottom of the connecting stud (11).

6. The cone bit with an anti-jamming structure according to claim 5, characterized in that: Screw holes are evenly formed on the outer side of the connecting disc (12), and bolts (13) are threadedly connected to the screw holes of the connecting disc (12). The connecting disc (12) is fixedly connected to the supporting mechanism (2) through the bolts (13).

7. The cone bit with an anti-jamming structure according to claim 6, characterized in that: A ring groove is formed at the bottom of the connecting disc (12), and a sealing washer (15) is clamped at the ring groove of the connecting disc (12). A snap ring (14) is fixedly installed at the bottom of the connecting disc (12), and a sieve hole cover (16) is fixedly installed at the bottom of the snap ring (14). The sieve hole cover (16) is located inside the sealing washer (15).

8. A rock bit with an anti-jamming structure according to claim 7, characterized in that: The support mechanism (2) includes a fixed disk (21), a convex ring (22) is fixedly installed on the top of the fixed disk (21), the convex ring (22) is adapted to the annular groove of the connecting disk (12), and the top of the convex ring (22) is in close contact with the bottom of the sealing gasket (15).

9. The cone bit with an anti-jamming structure according to claim 8, characterized in that: A shaft hole plate (23) is fixedly installed at the bottom of the fixed disk (21), the shaft hole plates (23) are uniformly installed along the central position of the fixed disk (21), and the opposite surfaces of the shaft hole plates (23) are arc surfaces sunken at the central position, and the arc surfaces of the shaft hole plates (23) are adapted to the arc surfaces of the tapered gear wheels (35).

10. A roller bit with an anti-jamming structure according to claim 9, characterized in that: An inner spray hole (24) is formed at the central position of the bottom of the fixed disk (21), and inclined spray grooves (25) are uniformly formed at the bottom of the fixed disk (21), the inclined spray grooves (25) are inclined inward from bottom to top, convex blocks are uniformly arranged at the edge position of the bottom of the fixed disk (21), and the convex blocks are located between the shaft hole plates (23), an outer spray groove (27) is formed at the bottom of the convex block of the fixed disk (21), and side spray grooves (26) are formed on the opposite surfaces of the convex blocks.

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