Reamer bit and raise boring machine

Abstract

The invention relates to a reamer bit and a raise boring machine. The reamer bit comprises a cutter head, a cutter holder, a hob and an adjusting mechanism, the cutter holder is movably arranged on the cutter head, and the hob is movably arranged on the cutter. The adjusting mechanism is arranged on the cutter head and connected with the tool apron, and the adjusting mechanism can drive the tool apron to rotate relative to the cutter head so as to adjust the inclination angle of the hob relative to the cutter head. By arranging the adjusting mechanism, the adjusting mechanism can drive the cutter holder to rotate relative to the cutter head, and therefore the inclination angle of the hobbing cutter relative to the cutter head is adjusted. For example, in a hard rock area, the inclination angle of the hob relative to the cutterhead is increased, so that the extrusion force and shear force of the hob to rock are enhanced; for example, in a soft rock area, the inclination angle of the hob relative to the cutterhead is reduced, so that the cutting efficiency is improved. Thus, under the action of the adjusting mechanism, the adaptability of the reamer bit to complex stratums can be enhanced, the rock breaking efficiency is improved, meanwhile, tool abrasion is reduced, and the stability and adaptability in the drilling process are enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of reverse circulation drilling machines, in particular to a reaming bit and a reverse circulation drilling machine. BACKGROUND

[0002] The reverse circulation drilling machine drilling method is a safe and efficient shaft construction method, which is widely used in underground mining and various underground space engineering construction. The process principle is as follows: the motor of the drilling machine drives the hydraulic pump to transmit power to the hydraulic motor, and then drives the power head to rotate; the hydraulic system transmits the torque to the pilot bit or the reaming bit through the drill rod, so that the rolling cutter on the pilot bit or the reaming bit is pressed against the rock surface to realize rolling or micro-sliding. In this process, the rolling cutter produces continuous impact, extrusion and shearing action on the rock, thereby achieving efficient rock breaking.

[0003] The reaming bit is the core component of the reverse circulation drilling machine. In actual application, due to the significant differences in rock hardness, toughness, bedding structure and other aspects of different engineering strata, the rolling cutter is difficult to dynamically adapt to the changing geological conditions, resulting in unstable rock breaking efficiency and uneven cutter wear. SUMMARY

[0004] Therefore, it is necessary to provide a reaming bit and a reverse circulation drilling machine to enhance the adaptability of the reaming bit to complex strata, improve the rock breaking efficiency, reduce the cutter wear, and enhance the stability and adaptability of the drilling process.

[0005] In a first aspect, the present application provides a reaming bit, comprising:

[0006] a cutter head;

[0007] a cutter seat movably arranged on the cutter head;

[0008] a rolling cutter movably arranged on the cutter seat; and

[0009] an adjusting mechanism arranged on the cutter head and connected with the cutter seat, the adjusting mechanism being capable of driving the cutter seat to rotate relative to the cutter head to adjust the inclination angle of the rolling cutter relative to the cutter head.

[0010] In one of the embodiments, the adjusting mechanism comprises a moving piece arranged on the cutter head, the moving piece being capable of moving along the axial direction of the cutter head, the moving piece being provided with a pushing piece connected with the cutter seat, the pushing piece being used to push the cutter seat to rotate relative to the cutter head.

[0011] In one of the embodiments, the moving piece is annular, the cutter head is provided with a first guide hole extending along the axial direction of the cutter head, and the moving piece is movably arranged in the first guide hole.

[0012] In one of the embodiments, the moving member is ring-shaped, and the moving member is further provided with a support arm extending from the moving member along a radial direction of the moving member towards a center of the moving member, and the support arm is provided with the pushing member.

[0013] In one of the embodiments, the moving member is provided with a plurality of pushing members, and the plurality of pushing members are arranged at intervals along a circumferential direction of the moving member; and a periphery of the cutter head is provided with a plurality of tool holders arranged at intervals along a circumferential direction of the cutter head, and the plurality of tool holders on the periphery of the cutter head are connected to the plurality of pushing members on the moving member in one-to-one correspondence.

[0014] And / or, the support arm is provided with a plurality of support arms arranged at intervals along a circumferential direction of the moving member, and each of the plurality of support arms is provided with the pushing member; and a middle portion of the cutter head is provided with a plurality of tool holders arranged at intervals along a circumferential direction of the cutter head, and the plurality of tool holders on the middle portion of the cutter head are connected to the plurality of pushing members on the support arm in one-to-one correspondence.

[0015] In one of the embodiments, the cutter head is provided with a guide member extending along an axial direction of the cutter head, and the guide member is in guiding cooperation with at least one of the moving member and the support arm.

[0016] In one of the embodiments, the adjusting mechanism further comprises a rotating member movably arranged on the cutter head, and a linkage member, one end of the linkage member being movably connected to the moving member, and the other end of the linkage member being movably connected to the rotating member, and the rotating member is capable of rotating about an axis of the cutter head to push the moving member to move along an axial direction of the cutter head through the linkage member.

[0017] In one of the embodiments, at least one of the rotating member and the cutter head is provided with a second guide hole extending along a circumferential direction of the cutter head; and at least the other of the rotating member and the cutter head is provided with a guide protrusion movably arranged in the second guide hole, and the linkage member is connected to the guide protrusion.

[0018] In one of the embodiments, the adjusting mechanism further comprises a driving member arranged on the cutter head, and the driving member is used to drive the rotating member to rotate about an axial direction of the cutter head.

[0019] And / or, the cutter head is provided with a slag discharge hole penetrating through the cutter head along an axial direction of the cutter head; and the rotating member is ring-shaped, and the rotating member is arranged on a side of the cutter head away from the tool holders and communicates with the slag discharge hole.

[0020] In a second aspect, the application also provides a back drilling machine comprising the reaming bit as described in any one of the above.

[0021] The reaming bit and the back drilling machine as described above, by setting the adjusting mechanism, the adjusting mechanism can drive the cutter holder to rotate relative to the cutter disc, so as to adjust the inclination angle of the hob relative to the cutter disc. For example, in the hard rock area, the inclination angle of the hob relative to the cutter disc is increased, so as to enhance the extrusion force and shear force of the hob on the rock; for example, in the soft rock area, the inclination angle of the hob relative to the cutter disc is reduced, so as to improve the cutting efficiency. In this way, under the action of the adjusting mechanism, the adaptability of the reaming bit to the complex stratum can be enhanced, the rock breaking efficiency can be improved, the tool wear can be reduced, and the stability and adaptability of the drilling process can be enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The structure schematic diagram of the reaming bit of an embodiment of the application.

[0023] Figure 2 The structure schematic diagram of the reaming bit shown in FIG. Figure 1 The structure schematic diagram of the reaming bit shown in FIG.

[0024] Figure 3 The structure schematic diagram of the reaming bit shown in FIG. Figure 2 The local enlarged schematic diagram of A in FIG.

[0025] Figure 4 The structure schematic diagram of the reaming bit shown in FIG. Figure 1 The structure schematic diagram of the reaming bit shown in FIG.

[0026] Figure 5 The structure schematic diagram of the reaming bit shown in FIG. Figure 4 The local enlarged schematic diagram of B in FIG.

[0027] BRIEF DESCRIPTION OF DRAWINGS

[0028] 10, center shaft; 20, cutter disc; 21, first cutter disc body; 211, deslagging hole; 22, second cutter disc body; 221, second guide hole; 23, connecting body; 231, first guide hole; 30, cutter holder; 40, hob; 50, adjusting mechanism; 51, moving piece; 511, support arm; 512, pushing piece; 52, rotating piece; 521, guide protrusion; 53, linkage piece; 54, driving piece; 60, guide piece. DETAILED DESCRIPTION

[0029] In order to make the above objectives, features and advantages of the application more obvious and easy to understand, the specific embodiments of the application are described in detail below in combination with the drawings. In the following description, a large number of specific details are set forth in order to fully understand the application. However, the application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the application, so the application is not limited by the specific embodiments disclosed below.

[0030] The embodiment of the present application provides a reverse circulation drilling machine, which comprises a reaming bit. The reverse circulation drilling machine has the advantages of simple process, high drilling speed and strong adaptability, and the performance of the reaming bit as a core component of the reverse circulation drilling machine is crucial.

[0031] Referring to Figure 1 , the reaming bit comprises a central shaft 10, a cutter head 20, a cutter seat 30 and a rolling cutter 40. The cutter head 20 is arranged on the central shaft 10, the cutter seat 30 is arranged on the cutter head 20, and the rolling cutter 40 is movably arranged on the cutter seat 30. When the reaming bit is in operation, the cutter head 20 can rotate around the central shaft 10, thereby driving the cutter seat 30 on the cutter head 20 to rotate synchronously, so that the rolling cutter 40 is forced to tightly press against a rock working surface under the action of drilling pressure. While the rolling cutter 40 rotates in the drilling hole, the rolling cutter 40 rolls along the rock surface or produces a slight slip, and the rock is broken through continuous impact, extrusion and shearing action.

[0032] The cutter head 20 comprises 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 oppositely and spacedly arranged along the axial direction of the cutter head 20, and the connecting body 23 is arranged between the first cutter head body 21 and the second cutter head body 22.

[0033] Further, referring to Figure 1 , the cutter head 20 is provided with a slag discharge hole 211, and the slag discharge hole 211 penetrates through the cutter head 20 along the axial direction of the cutter head 20. In this way, the broken rock debris can be discharged through the slag discharge hole 211, and the rock debris on the excavation surface can be timely removed to prevent the rock debris from being accumulated in front of the cutter head 20, so that the reaming bit can avoid repeated cutting of the broken rock, the invalid power consumption and tool wear are reduced, the rolling cutter 40 can always be in contact with the rock surface, and the rock breaking efficiency is improved.

[0034] In one embodiment, referring to Figure 1 , the cutter seat 30 is movably arranged on the cutter head 20. Specifically, the cutter seat 30 is arranged on the side of the first cutter head body 21 away from the second cutter head body 22, and one side of the cutter seat 30 is hinged to the cutter head 20.

[0035] Further, referring to Figure 1 and Figure 2 , the reaming bit further comprises an adjusting mechanism 50. The adjusting mechanism 50 is arranged on the cutter head 20 and connected with the cutter seat 30, and the adjusting mechanism 50 can drive the cutter seat 30 to rotate relative to the cutter head 20, so as to adjust the inclination angle of the rolling cutter 40 relative to the cutter head 20.

[0036] It can be understood that the inclination angle of the rolling cutter 40 relative to the cutter head 20 refers to the included angle between the central rotation axis of the rolling cutter 40 and the surface of the first cutter head body 21.

[0037] By setting the adjusting mechanism 50, the adjusting mechanism 50 can drive the cutter seat 30 to rotate relative to the cutter disc 20, so as to adjust the inclination angle of the rolling cutter 40 relative to the cutter disc 20. For example, in the hard rock area, the inclination angle of the rolling cutter 40 relative to the cutter disc 20 is increased, so as to enhance the extrusion force and shear force of the rolling cutter 40 on the rock; for another example, in the soft rock area, the inclination angle of the rolling cutter 40 relative to the cutter disc 20 is reduced, so as to improve the cutting efficiency. In this way, under the action of the adjusting mechanism 50, the adaptability of the reaming drill bit to the complex stratum can be enhanced, the rock breaking efficiency can be improved, the tool wear can be reduced, and the stability and adaptability of the drilling process can be enhanced.

[0038] In one embodiment, referring to Figure 2 and Figure 3 , the adjusting mechanism 50 comprises a moving piece 51. The moving piece 51 is arranged on the cutter disc 20 and can move along the axial direction of the cutter disc 20. The moving piece 51 is provided with a pushing piece 512 which is movably arranged in the first cutter disc body 21 and connected with the cutter seat 30. During the operation of the reaming drill bit, the moving piece 51 moves along the axial direction of the cutter disc 20, and in turn drives the pushing piece 512 to move synchronously, so as to push the cutter seat 30, so that the side of the cutter seat 30 connected with the pushing piece 512 rotates relative to the cutter disc 20, thereby adjusting the inclination angle of the rolling cutter 40 relative to the cutter disc 20.

[0039] By moving the moving piece 51 along the axial direction of the cutter disc 20, the pushing force on one side of the cutter seat 30 is converted through the pushing piece 512, so as to directly control the rotation angle of the rolling cutter 40, realize linear control of angle adjustment, and improve the adjustment accuracy. The moving piece 51 and the pushing piece 512 are integrated on the cutter disc 20, so that the structure is compact, the complex spatial angle adjustment can be converted into simple axial linear motion, the operation process is simplified, and the adjustment difficulty is reduced.

[0040] Specifically, the first cutter disc body 21 is provided with a relief hole, and the pushing piece 512 is movably arranged in the relief hole. The bottom of the cutter seat 30 is provided with a connecting block, and the pushing piece 512 is hinged with the connecting block.

[0041] Optionally, the material of the pushing piece 512 is selected to be high-strength alloy steel, so as to ensure that the pushing piece 512 will not be deformed or damaged when bearing a large pushing force.

[0042] In one embodiment, referring to Figure 4 , the moving piece 51 is annular. In this way, the problem of interference between the moving piece 51 and the cutter disc 20 can be avoided, the moving piece 51 can be conveniently installed on the cutter disc 20, and the overall structure of the reaming drill bit is compact, which is beneficial to the miniaturization of the reaming drill bit. In addition, since the moving piece 51 is annular, the weight of the moving piece 51 can be reduced, which is beneficial to the lightweight of the reaming drill bit.

[0043] In one embodiment, referring to Figure 4, the cutter head 20 is provided with a first guide hole 231. Specifically, the first guide hole 231 is arranged on the connecting body 23. The first guide hole 231 extends along the axial direction of the cutter head 20, and the annular moving piece 51 penetrates through the first guide hole 231. By arranging the first guide hole 231, the movement of the moving piece 51 is guided, avoiding the movement of the moving piece 51 from deviating, being stuck, and the like during movement, improving the stability of the movement of the moving piece 51, and thus improving the accuracy of the angle adjustment of the hob 40. In addition, by arranging the first guide hole 231, the moving piece 51 and the cutter head 20 are tightly matched, which can effectively inhibit the vibration or shaking of the moving piece 51 during work, and improve the stability of the moving piece 51.

[0044] In one embodiment, referring to Figure 4 , the moving piece 51 is provided with a plurality of pushing pieces 512, and the plurality of pushing pieces 512 are arranged at intervals along the circumferential direction of the moving piece 51. Optionally, the plurality of pushing pieces 512 are arranged at equal intervals along the circumferential direction of the moving piece 51.

[0045] Further, referring to Figure 1 and Figure 4 , the cutter head 20 is provided with a plurality of tool seats 30, the plurality of tool seats 30 are arranged at intervals along the circumferential direction of the cutter head 20, and the plurality of tool seats 30 are each provided with a hob 40. Optionally, the plurality of tool seats 30 are arranged at equal intervals along the circumferential direction of the cutter head 20. The plurality of tool seats 30 are connected one by one with the plurality of pushing pieces 512. In this way, not only is the uniform transmission of the load along the circumferential direction and the mechanical balance achieved, but also the stability and the anti-uniform load capacity of the overall structure are enhanced, and each hob 40 has independent stroke control capability. In addition, even if a single hob 40 fails, it does not affect the overall function of the hole expanding drill, so that the rock breaking performance is maintained continuously and reliably under complex geological conditions, and the adaptability and operation redundancy of the hole expanding drill are improved.

[0046] In one embodiment, referring to Figure 4 and Figure 5 , the moving piece 51 is further provided with a support arm 511. The support arm 511 extends from the inner circumferential surface of the moving piece 51 to the center of the moving piece 51 in the radial direction of the moving piece 51, and the support arm 511 is provided with the pushing piece 512. By arranging the support arm 511, the support arm 511 can provide a mounting position for the pushing piece 512, so that the tool seat 30 close to the central region of the cutter head 20 can be driven to rotate relative to the cutter head 20, so that more hobs 40 can adjust the inclination angle through the pushing piece 512, and the consistency of the pushing action can also be ensured, and the accuracy and reliability of the angle adjustment of the hob 40 are improved.

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

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

[0049] In an exemplary embodiment, the eight tool seats 30 are arranged at intervals along the axial direction of the cutter head 20, and the other four tool seats 30 are arranged at intervals along the circumferential direction of the cutter head 20. The annular moving member 51 is provided with eight pushing members 512. The four support arms 511 are arranged at intervals along the circumferential direction of the annular moving member 51, and each of the support arms 511 is provided with a support member. All the support members are connected to the tool seats 30 one by one.

[0050] In one embodiment, referring to 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 the guide member 60 is in guiding cooperation with at least one of the moving member 51 and the support arm 511. In this way, the movement of the moving member 51 is guided by the guide member 60, so as to improve the stability of the movement of the moving member 51, thereby improving the accuracy of the angle adjustment of the hob 40.

[0051] In an exemplary embodiment, the cutter head 20 is provided with the guide member 60 corresponding to the part of the annular moving member 51, and the guide member 60 is arranged through the annular moving member 51 and is in guiding cooperation with the annular moving member 51. The cutter head 20 is also provided with the guide member 60 corresponding to the part of the support arm 511, and the guide member 60 is arranged through the support arm 511 and is in guiding cooperation with the support arm 511.

[0052] In one embodiment, referring to Figure 2 , Figure 3 and Figure 4 , the adjustment mechanism 50 further comprises a rotating member 52 and a linkage member 53. The rotating member 52 is movably arranged 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 in the shape of a rod, one end of the linkage member 53 is hingedly connected to the moving member 51, and the other end of the linkage member 53 is hingedly connected to the rotating member 52.

[0053] When the reamer bit is in operation, the rotating member 52 rotates around the axis of the cutter head 20, and then the force is transmitted to the moving member 51 through the linkage member 53, the moving member 51 moves along the axis of the cutter head 20, and then the cutter holder 30 is pushed to rotate relative to the cutter head 20, so as to adjust the inclination angle of the hob 40 relative to the cutter head 20. In this way, when one driving member 54 drives one rotating member 52, the moving member 51 can be driven through the axially arranged linkage member 53, and it is ensured that all the hobs 40 can be completely synchronized and rotated at the same angle, so as to avoid uneven cutting stress and damage to the hobs 40 caused by unsynchronized adjustment.

[0054] Further, the linkage member 53 is provided in plurality, and the plurality of linkage members 53 are arranged between the rotating member 52 and the moving member 51, and the plurality of linkage members 53 are arranged at intervals along the circumference of the rotating member 52. One end of all the linkage members 53 is hinged to the rotating member 52, and the other end of the linkage member 53 is hinged to the moving member 51.

[0055] In the example embodiment, the linkage member 53 is provided in four, and the four linkage members 53 are arranged at equal intervals 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 extending along the circumference of the cutter head 20. Specifically, the second guide hole 221 is an arc-shaped hole, and the curvature and size of the arc-shaped hole are matched with the rotation track of the rotating member 52. At least the other one of the rotating member 52 and the cutter head 20 is provided with a guide protrusion 521 movably arranged in the second guide hole 221. The linkage member 53 is connected with the guide protrusion 521. In this way, under the cooperation of the guide protrusion 521 and the second guide hole 221, the rotation movement of the rotating member 52 is guided, the stability of the movement of the rotating member 52 is improved, and the accuracy of the adjustment of the inclination angle of the hob 40 is improved.

[0057] In the example embodiment, referring to Figure 4 , the rotating member 52 is arranged on the side of the second cutter head body 22 away from the first cutter head body 21, the rotating member 52 is provided with the guide protrusion 521, the second cutter head body 22 is provided with the second guide hole 221, and the guide protrusion 521 is arranged in the second guide hole 221.

[0058] In one embodiment, referring to Figure 2, the rotating member 52 is annular. In this way, the center of the annular rotating member 52 forms a circular hole, which is in communication with the slag discharge hole 211 of the cutter head 20, so that the crushed slag can directly fall through the circular hole under the action of gravity, avoiding the accumulation and jamming of the crushed slag on the surface of the rotating member 52. At the same time, while ensuring the structural strength, the rotating mass can be reduced, the load of the driving member 54 and the starting energy consumption can be reduced, the start-stop and speed change response of the rotating member 52 is more rapid, and thus the accuracy of the adjustment of the inclination angle of the milling cutter 40 is improved. In addition, the hollow area of the annular rotating member 52 also passes through the central shaft 10, avoiding structural interference.

[0059] In one embodiment, referring to Figure 2 , the adjusting mechanism 50 further comprises a driving member 54. The driving member 54 is arranged on the cutter head 20. Specifically, the driving member 54 is arranged on the second cutter head body 22 away from the first cutter head body 21. The driving member 54 is connected with the rotating member 52, and the driving member 54 is used to drive the rotating member 52 to rotate around the axial direction of the cutter head 20.

[0060] Optionally, the driving member 54 is an electric push rod. The electric push rod comprises a cylinder and a piston rod connected with the cylinder, the cylinder is arranged on the cutter head 20, and the end of the piston rod away from the cylinder is movably connected with the rotating member 52. If it is necessary to adjust the inclination angle of the milling cutter 40, the electric push rod is started, the piston rod is extended to push the rotating member 52 to rotate around the axial direction of the cutter head 20, the rotating member 52 drives the pushing member 512 to move along the axial direction of the cutter head 20 towards the cutter holder 30 through the linkage 53, so as to drive the cutter holder 30 to rotate relative to the cutter head 20, thereby adjusting the inclination angle of the milling cutter 40. In addition, the electric push rod is used as a power source, which has high precision, high response speed and good control performance, and can flexibly and accurately change the inclination angle of the milling cutter 40 according to the actual situation.

[0061] Of course, in other embodiments, the driving member 54 can also be a hydraulic push rod or a pneumatic push rod, without being limited thereto.

[0062] The working principle of the reamer bit is as follows:

[0063] When it is necessary to adjust the inclination angle of the milling cutter 40 according to different rock characteristics, the driving member 54 is started, the piston rod of the driving member 54 is extended to push the rotating member 52 to rotate around the axial direction of the cutter head 20, and the guide protrusion 521 moves in the second guide hole 221. The guide protrusion 521 drives the moving member 51 and the supporting arm 511 to move along the axial direction of the cutter head 20 through the linkage 53, the moving member 51 moves in the first guide hole 231, and then the cutter holder 30 connected with the pushing member 512 is driven to rotate relative to the cutter head 20 through the pushing member 512, so as to realize the adjustment of the angle of the milling cutter 40.

[0064] After the angle adjustment of the rolling cutter 40 is completed, the motor of the reverse drilling rig drives the hydraulic pump, the hydraulic pump drives the hydraulic motor, and the power head is driven, and the torque is transmitted to the reaming drill bit by the hydraulic power to drive the center shaft 10 and the cutter head 20 to rotate as a whole, and the rolling cutter 40 rolls or slightly slips along the rock working surface at the bottom of the well under the action of the drilling pressure, and produces impact, extrusion and shearing action on the rock, breaks the rock, and the broken rock debris is discharged through the discharge hole 211.

[0065] In the description of the present application, it should be understood that if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0066] In addition, if these terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one feature. In the description of the present application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0067] In the present application, unless otherwise specifically defined and limited, if the terms "mounting", "connecting", "connecting", "fixing" and the like appear, these terms should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0068] In the present application, unless specifically defined otherwise, if there is an expression "on" or "under" or similar, it can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "on", "above" and "over" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0069] It should be noted that if an element is referred to as being "fixed" or "attached" to another element, it can be directly on the other element or there can be an intervening element. If an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element, or intervening elements can be present. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions as used herein are for purposes of explanation only and are not intended to be limiting.

[0070] The technical features of the above-described embodiments can be combined in any manner, and in order to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combinations of the technical features do not contradict each other, they should be considered to be within the scope of the present disclosure.

[0071] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A reaming drill bit, characterized in that, include: Cutterhead; 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.

2. The reaming drill bit according to claim 1, characterized in that, The adjusting mechanism includes a movable member disposed on the cutter head. The movable member is capable of moving along the axial direction of the cutter head. The movable member is provided with a pushing member, which is connected to the cutter holder. The pushing member is used to push the cutter holder to rotate relative to the cutter head.

3. The reaming drill bit according to claim 2, 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.

4. The reaming drill bit according to claim 2, 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.

5. The reaming drill bit according to claim 4, 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. 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.

6. The reaming drill bit according to claim 4, 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 2, characterized in that, The adjustment mechanism further includes a rotating component and a linkage component. The rotating component is movably disposed on the cutter head. One end of the linkage component is movably connected to the moving component, and the other end of the linkage component is movably connected to the rotating component. The rotating component can rotate around the axis of the cutter head so as to push the moving component to move along the axial direction of the cutter head through the linkage component.

8. The reaming drill bit according to claim 7, 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.

9. The reaming drill bit according to claim 7, characterized in that, The adjustment mechanism further includes a driving member, which is disposed on the cutter head and is used to drive the rotating member to rotate about the axis of the cutter head; 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.

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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