Reamer bit and raise boring machine

Abstract

This application relates to a reaming drill bit and a raise boring machine. The reaming drill bit includes a cutterhead, a cutter holder, a cutter roller, and an adjustment mechanism. The cutter holder is movably mounted on the cutterhead, and the cutter roller is movably mounted on the cutter. The adjustment mechanism is located on the cutterhead and connected to the cutter holder. The adjustment mechanism can drive the cutter holder to rotate relative to the cutterhead to adjust the tilt angle of the cutter roller relative to the cutterhead. By setting up the adjustment mechanism, the adjustment mechanism can drive the cutter holder to rotate relative to the cutterhead, thereby adjusting the tilt angle of the cutter roller relative to the cutterhead. For example, in hard rock areas, increasing the tilt angle of the cutter roller relative to the cutterhead enhances the squeezing and shearing force of the cutter roller on the rock; conversely, in soft rock areas, decreasing the tilt angle of the cutter roller relative to the cutterhead improves cutting efficiency. Thus, under the action of the adjustment mechanism, the adaptability of the reaming drill bit to complex formations can be enhanced, rock breaking efficiency can be improved, while reducing tool wear and enhancing the stability and adaptability of the drilling process.

Description

Technical Field

[0001] This application relates to the field of raise boring machine technology, and in particular to a hole-reaming drill bit and a raise boring machine. Background Technology

[0002] Raise-the-well drilling is a safe and efficient method for constructing wells, widely used in underground mining and various underground space engineering projects. Its working principle is as follows: The drilling rig motor drives a hydraulic pump, transmitting power to a hydraulic motor, which in turn rotates the power head. The hydraulic system transmits torque through the drill pipe to the pilot bit or reamer bit, causing the cutters on the pilot bit or reamer bit to press firmly against the rock surface, achieving rolling or slight slippage. During this process, the cutters exert continuous impact, compression, and shearing forces on the rock, thus achieving efficient crushing.

[0003] The reaming bit is the core component of the raise boring machine. In practical applications, due to the significant differences in rock hardness, toughness, and bedding structure in the strata of different projects, the cutting tool is difficult to dynamically adapt to the changing geological conditions, resulting in unstable rock breaking efficiency and uneven tool wear. Summary of the Invention

[0004] Therefore, it is necessary to provide a hole-reaming drill bit and a raise boring machine to enhance the adaptability of the hole-reaming drill bit to complex formations, improve rock-breaking efficiency, reduce tool wear, and enhance the stability and adaptability of the drilling process.

[0005] In a first aspect, this application provides a reaming drill bit, comprising:

[0006] Cutter head;

[0007] A tool holder, which is movably disposed on the tool disc;

[0008] A hobbing cutter, the hobbing cutter being movably disposed on the cutter holder; and

[0009] An adjustment mechanism is provided on the cutter head and connected to the cutter holder. The adjustment mechanism can drive the cutter holder to rotate relative to the cutter head to adjust the tilt angle of the hob relative to the cutter head.

[0010] In one embodiment, the adjusting mechanism includes a movable member disposed on the cutter head, the movable member being movable along the axial direction of the cutter head, the movable member having a pusher member connected to the cutter holder, the pusher member being used to push the cutter holder to rotate relative to the cutter head.

[0011] In one embodiment, the movable member is annular; the cutter head is provided with a first guide hole that extends along the axial direction of the cutter head, and the movable member is movably disposed through the first guide hole.

[0012] In one embodiment, the movable member is annular and further provided with a support arm extending radially from the movable member toward the center of the movable member, and the support arm is provided with the pusher.

[0013] In one embodiment, the movable member is provided with a plurality of pushing members, which are spaced apart circumferentially along the movable member; the periphery of the cutter head is provided with a plurality of cutter holders, which are spaced apart circumferentially along the cutter head, and the plurality of cutter holders on the periphery of the cutter head are connected one-to-one with the plurality of pushing members on the movable member.

[0014] And / or, the support arm is provided in multiple ways, the multiple support arms are arranged at intervals along the circumference of the moving member, and each support arm is provided with the push member; the cutter head is provided with multiple cutter seats in the middle, the multiple cutter seats are arranged at intervals along the circumference of the cutter head, and the multiple cutter seats in the middle of the cutter head are connected one-to-one with the multiple push members on the support arm.

[0015] In one embodiment, the cutter head is provided with a guide that extends axially along the cutter head and guides at least one of the moving member and the support arm.

[0016] In one embodiment, the adjusting mechanism further includes a rotating member and a linkage member. The rotating member is movably disposed on the cutter head. One end of the linkage member is movably connected to the moving member, and the other end of the linkage member is movably connected to the rotating member. The rotating member can rotate around the axis of the cutter head to push the moving member to move along the axial direction of the cutter head through the linkage member.

[0017] In one embodiment, at least one of the rotating member and the cutter head is provided with a second guide hole, the second guide hole extending circumferentially along the cutter head; at least the other of the rotating member and the cutter head is provided with a guide protrusion, the guide protrusion being movably disposed within the second guide hole, and the linkage member being connected to the guide protrusion.

[0018] In one embodiment, the adjusting mechanism further includes a driving member disposed on the cutter head, the driving member being used to drive the rotating member to rotate about the axial direction of the cutter head;

[0019] And / or, the cutter head is provided with a slag discharge hole, which penetrates the cutter head along the axial direction of the cutter head; the rotating member is annular, located on the side of the cutter head opposite to the cutter holder, and communicates with the slag discharge hole.

[0020] Secondly, this application also provides a raise boring machine, including the reaming bit described in any of the above claims.

[0021] The aforementioned reaming drill bit and raise boring machine incorporate an adjustment mechanism. This mechanism drives the cutter head to rotate relative to the cutterhead, thereby adjusting the tilt angle of the cutter rollers relative to the cutterhead. For example, in hard rock areas, increasing the tilt angle of the cutter rollers relative to the cutterhead enhances the compressive and shearing forces exerted by the rollers on the rock; conversely, in soft rock areas, decreasing the tilt angle of the cutter rollers relative to the cutterhead improves cutting efficiency. Thus, under the action of the adjustment mechanism, the reaming drill bit's adaptability to complex formations is enhanced, rock-breaking efficiency is improved, while tool wear is reduced, and the stability and adaptability of the drilling process are strengthened. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a reaming drill bit according to an embodiment of this application.

[0023] Figure 2 for Figure 1 The diagram shows the structure of the reaming drill bit from another perspective.

[0024] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0025] Figure 4 for Figure 1 The diagram shows a partial structural schematic of a reaming drill bit.

[0026] Figure 5 for Figure 4 A magnified view of a portion of point B in the middle.

[0027] Explanation of icon numbers:

[0028] 10. Central shaft; 20. Cutter head; 21. First cutter head body; 211. Slag discharge hole; 22. Second cutter head body; 221. Second guide hole; 23. Connecting body; 231. First guide hole; 30. Cutter holder; 40. Roller cutter; 50. Adjustment mechanism; 51. Moving part; 511. Support arm; 512. Pushing part; 52. Rotating part; 521. Guide protrusion; 53. Linkage part; 54. Driving part; 60. Guide part. Detailed Implementation

[0029] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0030] One embodiment of this application provides a raise boring machine, including a reaming bit. Raise boring machines have the advantages of simple manufacturing process, fast drilling speed and strong adaptability, and the reaming bit, as the core component of the raise boring machine, has crucial performance.

[0031] See Figure 1 The reaming drill bit includes a central shaft 10, a cutterhead 20, a cutter holder 30, and a hob 40. The cutterhead 20 is mounted on the central shaft 10, the cutter holder 30 is mounted on the cutterhead 20, and the hob 40 is movably mounted on the cutter holder 30. During operation, the cutterhead 20 rotates around the central shaft 10, which in turn drives the cutter holder 30 to rotate synchronously, forcing the hob 40 to press tightly against the rock face under drilling pressure. As the drill rotates, the hob 40 rolls along the rock surface or undergoes slight slippage, breaking the rock through continuous impact, compression, and shearing.

[0032] The cutter head 20 includes a first cutter head body 21, a second cutter head body 22, and a connecting body 23. The first cutter head body 21 and the second cutter head body 22 are arranged opposite to each other and spaced apart along the axial direction of the cutter head 20, and the connecting body 23 is located between the first cutter head body 21 and the second cutter head body 22.

[0033] Further, see Figure 1 The cutterhead 20 is equipped with a slag discharge hole 211, which extends through the cutterhead 20 along its axial direction. This design allows the crushed rock debris to be discharged through the slag discharge hole 211, promptly removing rock debris from the excavation face and preventing its accumulation in front of the cutterhead 20. This avoids repeated cutting of the already crushed rock by the reamer, reducing ineffective power consumption and tool wear, ensuring that the roller cutter 40 is always in contact with the rock surface, and improving rock breaking efficiency.

[0034] In one embodiment, see Figure 1 The tool holder 30 is movably disposed on the tool disc 20. Specifically, the tool holder 30 is disposed on the side of the first tool disc body 21 opposite to the second tool disc body 22, and one side of the tool holder 30 is hinged to the tool disc 20.

[0035] Further, see Figure 1 and Figure 2 The reaming drill bit also includes an adjustment mechanism 50. The adjustment mechanism 50 is located on the cutter head 20 and connected to the cutter holder 30. The adjustment mechanism 50 can drive the cutter holder 30 to rotate relative to the cutter head 20 to adjust the tilt angle of the hob 40 relative to the cutter head 20.

[0036] It is understandable that the tilt angle of the hob 40 relative to the cutter head 20 refers to the angle between the central axis of rotation of the hob 40 and the surface of the first cutter head body 21.

[0037] By setting an adjustment mechanism 50, the tool holder 30 can be driven to rotate relative to the cutter head 20, thereby adjusting the tilt angle of the hob 40 relative to the cutter head 20. For example, in hard rock areas, increasing the tilt angle of the hob 40 relative to the cutter head 20 enhances the compressive and shearing force of the hob 40 on the rock; conversely, in soft rock areas, decreasing the tilt angle of the hob 40 relative to the cutter head 20 improves cutting efficiency. Thus, under the action of the adjustment mechanism 50, the adaptability of the reaming drill bit to complex formations can be enhanced, rock-breaking efficiency can be improved, tool wear can be reduced, and the stability and adaptability of the drilling process can be enhanced.

[0038] In one embodiment, see Figure 2 and Figure 3 The adjusting mechanism 50 includes a movable member 51. The movable member 51 is disposed on the cutter head 20 and can move along the axial direction of the cutter head 20. The movable member 51 is provided with a pusher 512, which is movably disposed through the first cutter head body 21 and connected to the cutter holder 30. When the reaming drill bit is operating, the movable member 51 moves along the axial direction of the cutter head 20, thereby driving the pusher 512 to move synchronously, so as to push the cutter holder 30, causing the side of the cutter holder 30 connected to the pusher 512 to rotate relative to the cutter head 20, thereby adjusting the tilt angle of the hob 40 relative to the cutter head 20.

[0039] The moving part 51 moves axially along the cutter head 20, and the force is converted into a thrust on one side of the cutter holder 30 by the pushing part 512, thereby directly controlling the rotation angle of the hob 40, realizing linear control of angle adjustment and improving adjustment accuracy. Integrating the moving part 51 and the pushing part 512 into the cutter head 20 results in a compact structure that can transform complex spatial angle adjustment into simple axial linear motion, simplifying the operation process and reducing adjustment difficulty.

[0040] Specifically, the first cutter head body 21 is provided with a clearance hole, and the pusher 512 is movably inserted through the clearance hole. The bottom of the cutter holder 30 is provided with a connecting block, and the pusher 512 is hinged to the connecting block.

[0041] Optionally, the pusher 512 is made of high-strength alloy steel to ensure that the pusher 512 will not deform or be damaged when subjected to large thrust.

[0042] In one embodiment, see Figure 4 The movable component 51 is ring-shaped. This avoids interference between the movable component 51 and the cutter head 20, facilitates the installation of the movable component 51 on the cutter head 20, and also makes the overall structure of the reamer compact, which is beneficial for miniaturization of the reamer. In addition, the ring shape of the movable component 51 also reduces its weight, which is beneficial for the lightweight design of the reamer.

[0043] In one embodiment, see Figure 4The cutter head 20 is provided with a first guide hole 231. Specifically, the first guide hole 231 is provided in the connecting body 23. The first guide hole 231 extends along the axial direction of the cutter head 20, and the annular moving member 51 passes through the first guide hole 231. By providing the first guide hole 231, the movement of the moving member 51 is guided, avoiding deviation or jamming during the movement of the moving member 51, improving the smoothness of the movement of the moving member 51, thereby improving the accuracy of the hobbing angle adjustment. In addition, by providing the first guide hole 231, a tight fit is formed between the moving member 51 and the cutter head 20, which can effectively suppress the vibration or shaking that may occur in the moving member 51 during operation, improving the smoothness of the moving member 51.

[0044] In one embodiment, see Figure 4 The movable member 51 is provided with a plurality of pushing members 512, which are spaced apart along the circumference of the movable member 51. Optionally, the plurality of pushing members 512 are equally spaced along the circumference of the movable member 51.

[0045] Further, see Figure 1 and Figure 4 The cutterhead 20 has multiple cutter holders 30 arranged at intervals along its circumference, and each cutter holder 30 is equipped with a hob cutter 40. Optionally, the multiple cutter holders 30 are equally spaced along the circumference of the cutterhead 20. Each cutter holder 30 is connected to a corresponding pusher 512. This arrangement not only achieves uniform load transfer and mechanical balance along the circumference, enhancing the overall structural stability and resistance to eccentric loading, but also gives each hob cutter 40 independent stroke control capability. Furthermore, even if a single hob cutter 40 fails, it does not affect the overall function of the reaming bit, thus maintaining continuous and reliable rock-breaking performance under complex geological conditions and improving the adaptability and operational redundancy of the reaming bit.

[0046] In one embodiment, see Figure 4 and Figure 5 The movable member 51 is also provided with a support arm 511. The support arm 511 extends radially from the inner circumferential surface of the movable member 51 towards its center, and the support arm 511 is provided with a pusher 512. By providing the support arm 511, the support arm 511 can provide a mounting position for the pusher 512, which can drive the cutter holder 30 near the center area of ​​the cutter head 20 to rotate relative to the cutter head 20. This allows more hobs 40 to have their tilt angle adjusted by the pusher 512, while also ensuring the consistency of the pushing action and improving the accuracy and reliability of the hob angle adjustment.

[0047] It should be noted that when the moving part 51 and the support arm 511 move along the axial direction of the cutter head 20, all the pushing parts 512 move synchronously, ensuring that the cutter holder 30 can be pushed simultaneously and evenly, so that the angle adjustment of all the hobs 40 has consistency and synchronicity.

[0048] Furthermore, multiple support arms 511 are provided, and the multiple support arms 511 are arranged at intervals along the circumference of the moving member 51. Optionally, the multiple support arms 511 are arranged at equal intervals along the circumference of the moving member 51. Each support arm 511 is provided with a pushing member 512.

[0049] In an exemplary embodiment, twelve tool holders 30 are provided, eight of which are located around the periphery of the cutter head 20 and spaced apart axially along the cutter head 20, and the other four are located in the center of the cutter head 20 and spaced apart circumferentially along the cutter head 20. An annular moving member 51 has eight pushing members 512. Four support arms 511 are provided, spaced apart circumferentially along the annular moving member 51, and each support arm 511 has a support member. All support members are connected to all tool holders 30 in a one-to-one correspondence.

[0050] In one embodiment, see Figure 4 The cutter head 20 is provided with a guide member 60. The guide member 60 extends along the axial direction of the cutter head 20 and is in a guiding engagement with at least one of the moving member 51 and the support arm 511. Thus, under the action of the guide member 60, the movement of the moving member 51 is guided, improving the smoothness of the movement of the moving member 51, thereby improving the accuracy of the hob angle adjustment.

[0051] In an exemplary embodiment, the cutter head 20 is provided with a guide member 60 at the portion corresponding to the annular moving member 51. The guide member 60 passes through the annular moving member 51 and is guided and engaged with the annular moving member 51. The cutter head 20 is also provided with a guide member 60 at the portion corresponding to the support arm 511. The guide member 60 passes through the support arm 511 and is guided and engaged with the support arm 511.

[0052] In one embodiment, see Figure 2 , Figure 3 and Figure 4 The adjusting mechanism 50 also includes a rotating member 52 and a linkage member 53. The rotating member 52 is movably disposed on the cutter head 20. One end of the linkage member 53 is movably connected to the moving member 51, and the other end of the linkage member 53 is movably connected to the rotating member 52. Specifically, the linkage member 53 is rod-shaped, with one end of the linkage member 53 hinged to the lifting moving member 51 and the other end of the linkage member 53 hinged to the rotating member 52.

[0053] During the operation of the reaming drill bit, the rotating component 52 rotates around the axis of the cutter head 20, and then transmits the force to the moving component 51 through the linkage 53. The moving component 51 moves along the axial direction of the cutter head 20, thereby pushing the tool holder 30 to rotate relative to the cutter head 20, thus adjusting the tilt angle of the hob 40 relative to the cutter head 20. In this way, when one driving component 54 drives one rotating component 52, the moving component 51 can be driven by the axially arranged linkage 53, ensuring that all hobs 40 can rotate completely synchronously and at the same angle, avoiding uneven cutting force and damage to the hobs 40 caused by asynchronous adjustment.

[0054] Furthermore, multiple linkage components 53 are provided, each located between the rotating component 52 and the moving component 51, and spaced apart circumferentially along the rotating component 52. One end of each linkage component 53 is hinged to the rotating component 52, and the other end is hinged to the moving component 51.

[0055] In the exemplary embodiment, four linkage members 53 are provided, and the four linkage members 53 are equally spaced along the circumference of the cutter head 20.

[0056] In one embodiment, at least one of the rotating member 52 and the cutter head 20 is provided with a second guide hole 221, which extends circumferentially along the cutter head 20. Specifically, the second guide hole 221 is an arc-shaped hole, the curvature and size of which match the rotation trajectory of the rotating member 52. At least the other of the rotating member 52 and the cutter head 20 is provided with a guide protrusion 521, which is movably disposed within the second guide hole 221. The linkage member 53 is connected to the guide protrusion 521. Thus, with the cooperation of the guide protrusion 521 and the second guide hole 221, the rotational movement of the rotating member 52 is guided, improving the smoothness of the movement of the rotating member 52, thereby improving the accuracy of the tilt angle adjustment of the hob 40.

[0057] In an exemplary embodiment, see Figure 4 The rotating component 52 is located on the side of the second cutter head body 22 away from the first cutter head body 21. The rotating component 52 is provided with a guide protrusion 521. The second cutter head body 22 is provided with a second guide hole 221. The guide protrusion 521 is located in the second guide hole 221.

[0058] In one embodiment, see Figure 2The rotating component 52 is annular. A circular hole is formed at the center of the annular rotating component 52, which connects to the slag discharge hole 211 of the cutter head 20. This allows slag to fall directly through the hole under gravity, preventing slag from accumulating or getting stuck on the surface of the rotating component 52. Simultaneously, while ensuring structural strength, it also reduces the rotating mass, lowers the load on the drive component 54 and the starting energy consumption, resulting in a faster start-stop and speed change response of the rotating component 52, thereby improving the accuracy of the hob 40's tilt angle adjustment. Furthermore, the hollow area of ​​the annular rotating component 52 allows the central shaft 10 to pass through, avoiding structural interference.

[0059] In one embodiment, see Figure 2 The adjusting mechanism 50 also includes a driving member 54. The driving member 54 is disposed on the cutter head 20. Specifically, the driving member 54 is disposed on the side of the second cutter head body 22 opposite to the first cutter head body 21. The driving member 54 is connected to the rotating member 52, and the driving member 54 is used to drive the rotating member 52 to rotate about the axial direction of the cutter head 20.

[0060] Optionally, the drive component 54 is an electric push rod. The electric push rod includes a cylinder and a piston rod connected to the cylinder. The cylinder is located on the cutter head 20, and the end of the piston rod opposite to the cylinder is movably connected to the rotating component 52. If it is necessary to adjust the tilt angle of the hob 40, the electric push rod is activated, the piston rod extends, and pushes the rotating component 52 to rotate around the axial direction of the cutter head 20. The rotating component 52 drives the pusher 512 to move along the axial direction of the cutter head 20 towards the tool holder 30 through the linkage 53, so that the tool holder 30 rotates relative to the cutter head 20, thereby adjusting the tilt angle of the hob 40. In addition, using an electric push rod as a power source has high precision, high response speed and good control performance, and can flexibly and accurately change the tilt angle of the hob 40 according to the actual situation.

[0061] Of course, in other embodiments, the drive element 54 may also be a hydraulic actuator or a pneumatic push rod, and is not limited thereto.

[0062] The working principle of a reaming drill bit is as follows:

[0063] When the tilt angle of the hob 40 needs to be adjusted according to different rock characteristics, the drive unit 54 is activated. The piston rod of the drive unit 54 extends and retracts, pushing the rotating member 52 to rotate around the axial direction of the cutter head 20. The guide protrusion 521 moves within the second guide hole 221. The guide protrusion 521 pushes the moving member 51 and the support arm 511 to move along the axial direction of the cutter head 20 through the linkage member 53. The moving member 51 moves within the first guide hole 231, and then pushes the side of the cutter holder 30 connected to the pusher 512 to rotate relative to the cutter head 20 through the pusher 512, thereby realizing the adjustment of the hob angle.

[0064] After the angle of the cutter head 40 is adjusted, the motor of the raise boring machine drives the hydraulic pump, which in turn drives the hydraulic motor and the power head. The hydraulic power is used to transmit torque to the reaming bit, causing the central shaft 10 and the cutter head 20 to rotate as a whole. During the rotation, the cutter head 40 rolls or slides slightly along the working surface of the rock at the bottom of the well under the action of drilling pressure, which impacts, squeezes and shears the rock, breaking it. The broken rock fragments are discharged through the slag discharge hole 211.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0069] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0070] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A reaming drill bit, characterized in that, include: Cutter head; A tool holder, which is movably disposed on the tool disc; A hobbing cutter, which is movably mounted on the cutter holder; as well as An adjustment mechanism is provided on the cutter head and connected to the cutter holder. The adjustment mechanism can drive the cutter holder to rotate relative to the cutter head to adjust the tilt angle of the hob relative to the cutter head. The adjustment mechanism includes a moving member, a rotating member, a linkage member, and a driving member. The moving member is located on the cutter head and can move along the axial direction of the cutter head. The moving member has a pushing member connected to the cutter holder and is used to push the cutter holder to rotate relative to the cutter head. The rotating member is movably located on the cutter head. One end of the linkage member is movably connected to the moving member, and the other end of the linkage member is movably connected to the rotating member. The rotating member can rotate around the axis of the cutter head to push the moving member to move along the axial direction of the cutter head through the linkage member. The driving member is located on the cutter head and is used to drive the rotating member to rotate around the axial direction of the cutter head.

2. The reaming drill bit according to claim 1, characterized in that, The movable component is ring-shaped; The cutter head is provided with a first guide hole, which extends along the axial direction of the cutter head, and the moving member is movably inserted through the first guide hole.

3. The reaming drill bit according to claim 1, characterized in that, The movable component is ring-shaped and also has a support arm that extends radially from the movable component toward the center of the movable component. The support arm has the pusher.

4. The reaming drill bit according to claim 3, characterized in that, The movable component is provided with a plurality of pushing components, which are spaced apart along the circumference of the movable component; the periphery of the cutter head is provided with a plurality of cutter holders, which are spaced apart along the circumference of the cutter head, and the plurality of cutter holders on the periphery of the cutter head are connected one-to-one with the plurality of pushing components on the movable component.

5. The reaming drill bit according to claim 3, characterized in that, The support arm is provided in multiple ways, and the multiple support arms are arranged at intervals along the circumference of the moving member. Each support arm is provided with a pusher. The cutter head is provided with multiple cutter holders in the middle, and the multiple cutter holders are arranged at intervals along the circumference of the cutter head. The multiple cutter holders in the middle of the cutter head are connected one-to-one with the multiple pushers on the support arm.

6. The reaming drill bit according to claim 3, characterized in that, The cutter head is provided with a guide member that extends along the axial direction of the cutter head and is guided and engaged with at least one of the moving member and the support arm.

7. The reaming drill bit according to claim 1, characterized in that, At least one of the rotating component and the cutter head is provided with a second guide hole, which extends circumferentially along the cutter head; at least the other of the rotating component and the cutter head is provided with a guide protrusion, which is movably disposed within the second guide hole, and the linkage component is connected to the guide protrusion.

8. The reaming drill bit according to claim 1, characterized in that, The cutter head is provided with a slag discharge hole, which extends through the cutter head along its axial direction.

9. The reaming drill bit according to claim 8, characterized in that, The rotating component is annular and is located on the side of the cutter head opposite to the cutter holder, and is connected to the slag discharge hole.

10. A raise boring machine, characterized in that, Includes the reaming drill bit as described in any one of claims 1 to 9.

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