Ball-cone inserted tooth hob

Abstract

The utility model discloses a ball-cone inserted tooth hob which comprises an inserted tooth cutterhead, a plurality of annularly arranged inserted tooth installation grooves are formed in the outer circumferential surface of the inserted tooth cutterhead, cone inserted teeth or ball inserted teeth are installed in the inserted tooth installation grooves, at least one ball inserted tooth is arranged between every two adjacent cone inserted teeth, and the tooth height of the cone inserted teeth is higher than that of the ball inserted teeth. According to the structure, in the staggered arrangement mode of the spherical inserted teeth and the conical inserted teeth, in the hard rock crushing process, the conical teeth can invade in a pilot mode and conduct radial and longitudinal damage and unloading on rocks, the spherical teeth can crush the rocks more easily in the invasion process, meanwhile, through the spherical cutting edges and the spherical surface parts of the conical inserted teeth, abrasion under the complex stress condition is reduced, and the service life of the rocks is prolonged. And the adaptability under different geological conditions is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel or coal mine tunnel excavation, in particular to a ball-cone insert tooth hob. Background Art

[0002] Hard rock formations are the "bottleneck" formations for drilling wells. When drilling vertical shafts, the insert cutter is mainly used to break the hard rock formations. However, in the complex stress environment of deep vertical shafts, how to effectively improve the rock breaking ability of the insert cutter has become a major technical challenge we are currently facing.

[0003] In response to the above technical problems, the industry has adopted technologies such as a toothed cutter ring for hard rock formations disclosed in patent publication number CN216741361U, which uses an axe-shaped blade structure to enhance the rock crushing effect. However, during the use of this V-shaped blade, as the wear increases, the cross-sectional area of ​​the tooth surface will gradually increase, causing the thrust of the shield machine to become unstable and gradually increase, which will have an adverse effect on the shield excavation. The simple spherical tooth structure cannot effectively handle hard rock formations. For this reason, we have designed a ball-cone toothed cutter to solve the above technical problems. Utility Model Content

[0004] In view of the problems existing in the above-mentioned prior art, the utility model provides a ball-cone toothed hob, which is a new ball-cone toothed hob formed by the staggered arrangement of ball and cone teeth. While having the radial and longitudinal crushing effects of a V-shaped blade, the wear resistance of the blade is greatly improved through the spherical blade and the spherical surface of the blade. While improving the hard rock crushing efficiency of TBM, the wear on the cutter body is reduced, making it more adaptable to complex and changeable rock formation environments.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts a ball-cone insert hob, including an insert cutter disc, a main shaft, an end cover, a hob pad and a hob pressure block, wherein the main shaft is installed at the center of the insert cutter disc, and end covers coaxial with the main shaft are installed on both sides of the insert cutter disc, at least two hob pads are arranged at the bottom of the end cover, and a hob pressure block is connected between two adjacent hob pads in the same circumferential direction, and the pressure surface of the hob pressure block faces outward; wherein:

[0006] The outer circumferential surface of the above-mentioned toothed cutter disc is provided with a plurality of annularly arranged tooth mounting grooves, in which conical teeth or ball teeth are installed, and at least one ball tooth is provided between two adjacent conical teeth. The tooth height of the conical teeth is higher than that of the ball teeth. Considering the aesthetics and practicality, the annularly arranged conical teeth are arranged at equal intervals along the outer circumferential surface of the above-mentioned toothed cutter disc.

[0007] More specifically, the conical insert comprises a first cylindrical portion, a cone portion and a spherical portion which are sequentially arranged outwardly along the insert mounting groove, the cylindrical portion is fixedly matched with the insert mounting groove, and the cone portion and the spherical portion are exposed externally.

[0008] More specifically, the ball insert includes a second cylindrical portion and a hemispherical portion which are sequentially arranged outwardly along the insert mounting groove, the second cylindrical portion is fixedly matched with the above-mentioned insert mounting groove, wherein the cylindrical diameters of the first cylindrical portion and the second cylindrical portion are the same.

[0009] The above structure adopts the staggered arrangement of ball and cone teeth. During the process of crushing hard rock, the cone teeth can invade first, destroy and unload the rock radially and longitudinally, making it easier for the ball teeth to crush the rock during the invasion process. At the same time, the spherical blade and the spherical surface of the cone teeth can reduce wear under complex stress conditions and improve adaptability under different geological conditions.

[0010] As a further optimization of the above scheme, without considering the cost, an auxiliary cutter disc is installed on the main shaft, and an annular blade is installed on the outer circumferential surface of the auxiliary cutter disc, thereby forming a mixed arrangement of double-roll cutter discs, which aims to enhance the ability of the V-shaped cutter teeth in longitudinally crushing rock formations, thereby making up for the lack of longitudinal crushing force of its spherical cutter teeth. Through the above mixed arrangement, the double-roll cutter disc can show more significant effects when crushing hard rock formations. The longitudinal crushing ability of the V-shaped cutter teeth is enhanced, ensuring the efficiency and stability of the cutter in the crushing operation, further improving the overall operation efficiency and rock crushing quality.

[0011] The utility model provides a ball-cone insert tooth hob with the following beneficial effects:

[0012] 1. The utility model is a ball-cone tooth hob, which has a staggered arrangement of ball and cone teeth. In the process of crushing hard rock, the cone teeth can invade first, destroy and unload the rock in the radial and longitudinal directions, so that the ball teeth can crush the rock more easily during the invasion process. At the same time, the spherical blade and the spherical surface of the cone teeth can reduce the wear under complex stress conditions and improve the adaptability under different geological conditions.

[0013] 2. The utility model is a ball-cone toothed cutter, which aims to enhance the ability of the V-shaped cutter teeth in longitudinally crushing rock formations by forming a double cutter disc with a mixed arrangement, thereby compensating for the lack of longitudinal crushing force of the spherical cutter teeth. Through the above-mentioned mixed arrangement, the double cutter disc can show a more significant effect when crushing hard rock formations. The longitudinal crushing ability of the V-shaped cutter teeth is enhanced, ensuring the efficiency and stability of the cutter in the crushing operation, and further improving the overall operation efficiency and rock crushing quality.

[0014] With reference to the following description and drawings, a specific embodiment of the present invention is disclosed in detail, indicating the manner in which the principle of the present invention can be adopted. It should be understood that the scope of the embodiment of the present invention is not limited thereby, and the embodiment of the present invention includes many changes, modifications and equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall assembly of a ball-cone insert hob;

[0016] Figure 2 It is a structural schematic diagram of the insert tooth installation groove of the insert tooth cutter head in the utility model;

[0017] Figure 3 It is a structural schematic diagram of the double hob cutter disc in the utility model;

[0018] Figure 4 It is a structural schematic diagram of the tooth mounting groove of the double hob cutter disc in the utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the ball insert in the utility model;

[0020] Figure 6 It is a structural schematic diagram of the cone insert tooth of the utility model.

[0021] In the figure: 1. toothed cutter disc; 2. main shaft; 3. end cover; 4. hob pad; 5. hob pressure block; 6. toothed mounting groove; 8. auxiliary cutter disc; 9. ball-set teeth; 10. cone-set teeth; 11. first cylindrical part; 12. cone part; 13. spherical part; 14. second cylindrical part; 15. hemispherical part. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail through the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the scope of the utility model.

[0023] It should be noted that when an element is referred to as being "disposed on, provided with" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected, connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. "Fixed connection" means a fixed connection. There are many ways of fixed connection, which are not within the scope of protection of this article. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only and do not represent the only implementation method.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art of the present invention. The terms used in the specification are only for the purpose of describing specific implementations and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0025] Please refer to the instruction manual Figure 1-6 The utility model provides a specific embodiment of a ball-cone insert hob. In this embodiment, the structure of the ball-cone insert hob 10 includes an insert cutter disc 1, a spindle 2, an end cover 3, a hob pad 4 and a hob pressure block 5, wherein:

[0026] The main shaft 2 is installed at the center of the insert cutter head 1, and the two sides of the insert cutter head 1 are equipped with end covers 3 coaxial with the main shaft 2. At least two hob pads 4 are arranged at the bottom of the end cover 3. Preferably, in this embodiment, the number of the hob pads 4 is two, and a hob pressure block 5 is connected between the two hob pads 4, and the pressure surface of the hob pressure block 5 faces outward. On the outer circumferential surface of the insert cutter head 1, a plurality of annularly arranged insert tooth installation grooves 6 are opened, and cone insert teeth 10 or ball insert teeth 9 can be installed in the insert tooth installation grooves 6.

[0027] It should be noted that at least one ball tooth 9 is provided between two adjacent cone teeth 10 , and the tooth height of the cone tooth 10 is higher than that of the ball tooth 9 . In the present embodiment, the number of the ball teeth 9 between two adjacent cone teeth 10 is two.

[0028] For the sake of aesthetics and practicality, in this embodiment, the annularly arranged conical inserts 10 are arranged at equal intervals on the outer circumferential surface of the insert cutter head 1.

[0029] Specifically, the conical insert 10 is composed of a first cylindrical portion 11, a conical portion 12 and a spherical portion 13 in sequence, wherein the first cylindrical portion 11 is fixedly matched with the insert mounting groove 6, and the conical portion 12 and the spherical portion 13 are exposed to the outside, and the conical portion 12 is a conical structure.

[0030] Similarly, the ball insert 9 is composed of a second cylindrical portion 14 and a hemispherical portion 15 , and the second cylindrical portion 14 is also fixedly matched with the insert mounting groove 6 .

[0031] It should be noted that the diameters of the first cylindrical portion 11 and the second cylindrical portion 14 are the same, so as to facilitate installation by workers.

[0032] The staggered arrangement of the ball and cone inserts 10 has significant advantages in breaking hard rock. The cone inserts can penetrate the rock first, destroy and unload it radially and longitudinally, so that the ball inserts can break the rock more easily during the penetration process. In addition, the spherical blade and the spherical surface 13 of the cone inserts 10 can effectively reduce wear under complex stress conditions and improve the adaptability of the tool under different geological conditions.

[0033] As a further possible example of the above example, without considering the cost, an auxiliary cutter disc 8 can also be installed on the main shaft 2, and its outer circumferential surface is equipped with an annular blade, thereby forming a mixed arrangement of double-roll cutter discs, which is intended to enhance the ability of the V-shaped cutter teeth to crush the rock formation in the longitudinal direction, so as to make up for the lack of its spherical cutter teeth in the longitudinal crushing force. Through the above mixed arrangement structure, the double-roll cutter disc can show a better effect when crushing hard rock formations, which not only enhances the longitudinal crushing ability of the V-shaped cutter teeth, but also ensures the efficiency and stability of the cutter in the crushing operation, thereby further improving the overall operation efficiency and rock crushing quality.

[0034] The ball-cone insert hob provided in this embodiment has the following working principle:

[0035] The utility model describes a ball-cone toothed roller cutter which utilizes the high tooth height and sharp shape of the conical teeth to first invade the rock, causing preliminary radial and longitudinal damage, thereby creating favorable conditions for subsequent ball tooth crushing. The ball teeth then enter the crushing process, utilizing their spherical structure to more evenly distribute the crushing force, thereby achieving more efficient rock crushing. The addition of the auxiliary cutter disc 8 strengthens the ability of the V-shaped cutter teeth to longitudinally crush rock formations, further improving the efficiency and quality of crushing hard rock formations.

[0036] In summary, the ball-cone insert 10 cutter of the utility model has two significant advantages: first, the staggered arrangement of the ball and cone inserts 10 improves the efficiency of crushing hard rock and reduces the wear of the cutter; second, by forming a mixed arrangement of double cutter discs, the longitudinal crushing capacity of the V-shaped cutter teeth is enhanced, ensuring the high efficiency and stability of the cutter in the crushing operation, thereby greatly improving the operating efficiency and rock crushing quality.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent substitution or improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A ball-cone insert hob, characterized in that: The invention comprises a toothed cutter disc (1), a main shaft (2), an end cover (3), a roller pad (4) and a roller pressure block (5), wherein the main shaft (2) is installed at the center of the toothed cutter disc (1), and end covers (3) coaxial with the main shaft (2) are installed on both sides of the toothed cutter disc (1), at least two roller pads (4) are arranged at the bottom of the end cover (3), and a roller pressure block (5) is connected between two adjacent roller pads (4) in the same circumferential direction, and the pressure surface of the roller pressure block (5) faces outwards; wherein: The outer circumferential surface of the insert cutter disc (1) is provided with a plurality of insert installation grooves (6) arranged in a ring shape, wherein a conical insert (10) or a ball insert (9) is installed in the insert installation groove (6), and at least one ball insert (9) is arranged between two adjacent conical inserts (10), and the tooth height of the conical insert (10) is higher than that of the ball insert (9).

2. A ball-cone insert hob according to claim 1, characterized in that: The conical insert (10) comprises a first cylindrical portion (11), a cone portion (12) and a spherical portion (13) which are arranged in sequence outwardly along the insert mounting groove (6); the cylindrical portion is fixedly matched with the insert mounting groove (6), and the cone portion (12) and the spherical portion (13) are exposed to the outside.

3. A ball-cone insert hob according to claim 2, characterized in that: The ball insert (9) comprises a second cylindrical portion (14) and a hemispherical portion (15) which are sequentially arranged outwardly along the insert mounting groove (6), and the second cylindrical portion (14) is fixedly matched with the insert mounting groove (6).

4. A ball-cone insert hob according to claim 3, characterized in that: The first cylindrical part (11) and the second cylindrical part (14) have the same cylindrical diameter.

5. A ball-cone insert hob according to claim 4, characterized in that: The annularly arranged conical inserts (10) are arranged at equal intervals along the outer circumferential surface of the insert cutter head (1).

6. A ball-cone insert hob according to claim 5, characterized in that: An auxiliary cutter disc (8) is also provided on the main shaft (2).

7. A ball-cone insert hob according to claim 6, characterized in that: An annular blade is mounted on the outer circumferential surface of the auxiliary cutter disc (8).

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