Cutter head and heading machine

Abstract

The embodiment of the invention provides a cutter head and a heading machine, and relates to the technical field of heading machines. The cutterhead comprises: a central cutterhead; the variable-diameter cutterhead comprises a variable-diameter cutterhead body and a driving assembly, and the variable-diameter cutterhead body is located on the edge of the central cutterhead and rotationally connected with the central cutterhead; the driving assembly is used for driving the variable-diameter cutter head body to rotate so as to adjust the angle between the variable-diameter cutter head body and the central axis of the central cutter head in a preset range, and the cutter head is used for achieving the effects that the diameter of the cutter head is convenient to change, and time and cost are saved.

Description

Technical Field

[0001] The present application relates to the technical field of tunnel boring machines, and in particular to a cutterhead and a tunnel boring machine. Background Art

[0002] Tunnel boring machines (TBMs) are mechanical equipment used in underground projects such as railway tunnels, highway tunnels, water diversion tunnels, coal mine tunnels, and urban subway tunnels. Due to their significant advantages in terms of cost-effectiveness, safety, and high efficiency in tunnel excavation, they are gaining increasing attention across various industries. Among these, fixed-circle tunnel boring machines (TBMs) are the most widely used.

[0003] However, in actual engineering, the diameter of a tunnel often needs to be adjusted based on the specific project design. This diameter change is currently typically achieved by designing multiple variable-diameter segmented cutterheads. Specifically, these segmented cutterheads are moved and installed within the tunnel to adjust their diameters to accommodate varying diameter requirements.

[0004] However, when implementing the above solution, it is necessary to excavate an operating space that exceeds the original tunnel size in the construction tunnel in order to disassemble and adjust the cutterhead, and a long period of downtime is required for disassembly and adjustment of the cutterhead, resulting in high construction costs, long construction period and high difficulty. Summary of the Invention

[0005] The embodiments of the present application provide a cutterhead and a tunnel boring machine, which are used to facilitate the diameter change of the cutterhead, saving time and cost.

[0006] In a first aspect, an embodiment of the present application provides a cutterhead, characterized by comprising:

[0007] Center cutterhead;

[0008] A variable diameter cutter disc, the variable diameter cutter disc comprising a variable diameter cutter disc body and a drive assembly, the variable diameter cutter disc body being located at the edge of the central cutter disc and being rotationally connected to the central cutter disc; the drive assembly being used to drive the variable diameter cutter disc body to rotate so as to adjust the angle between the variable diameter cutter disc body and the central axis of the central cutter disc within a preset range.

[0009] In a possible embodiment, a plurality of the variable diameter cutter discs are provided, and the plurality of variable diameter cutter discs are evenly arranged around the circumference of the central cutter disc.

[0010] In a possible implementation, a mounting seat is provided on the edge of the central cutter disc, and the variable diameter cutter disc is rotatably connected to the mounting seat.

[0011] In a possible implementation, the variable diameter cutter disc and the mounting seat are rotationally connected via a pin.

[0012] In a possible embodiment, it further includes: a connecting member, the connecting member having a connecting plate and a connecting leg, one end of the connecting leg is connected to the connecting plate, and the other end is connected to the center cutter disc, and the side of the connecting plate facing away from the connection with the connecting leg is connected to the tunnel boring machine body.

[0013] In a possible implementation manner, the driving assembly is provided on the connecting leg.

[0014] In a possible implementation, one end of the drive assembly is rotatably connected to the variable diameter cutter head body, and the other end is rotatably connected to the connecting leg.

[0015] In a possible embodiment, the drive assembly is an oil cylinder, and the drive assembly further includes a swivel joint, which is connected to the oil cylinder via a pipeline, and the swivel joint is also used to connect to an energy supply device that provides hydraulic oil via a pipeline.

[0016] In a second aspect, an embodiment of the present application provides a tunnel boring machine, characterized in that it includes a cutterhead, a main drive and a machine body, the main drive is arranged on the machine body, the cutterhead is connected to the main drive, and the main drive drives the cutterhead to rotate.

[0017] In a possible implementation, the machine body further includes: a first shield body, wherein the main drive is installed inside the first shield body;

[0018] The second shield body is arranged around the circumference of the first shield body and is detachably connected to the first shield body.

[0019] The embodiment of the present application provides a cutterhead and a tunnel boring machine, wherein the cutterhead is composed of a central cutterhead and a variable diameter cutterhead, wherein the variable diameter cutterhead includes a variable diameter cutterhead body and a drive assembly, wherein the variable diameter cutterhead body is rotatably connected to the edge of the central cutterhead, and the drive assembly drives the variable diameter cutterhead body to rotate. When the variable diameter cutterhead body rotates, the angle between the variable diameter cutterhead body and the central axis of the central cutterhead changes. When the drive assembly is at the retraction limit, the angle between the variable diameter cutterhead body and the central axis of the central cutterhead is minimum, and the cutterhead diameter is minimum. When the variable diameter cutterhead body rotates until the cutting surface of the variable diameter cutterhead body is parallel to the cutting surface of the central cutterhead, that is, when the angle between the variable diameter cutterhead body and the central axis of the central cutterhead is 90°, the area of ​​slag that can be cut by the cutterhead is the largest, and the overall diameter of the cutterhead reaches the largest. By adjusting the angle between the variable diameter cutterhead body and the central axis of the central cutterhead, the cutterhead diameter can be changed in real time, the cutterhead adjustment is convenient, and time and cost are saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0021] Figure 1 A schematic diagram of the longitudinal section of the tunnel boring machine when the cutterhead is at its minimum diameter change provided for this application;

[0022] Figure 2 A schematic diagram of the longitudinal section of the tunnel boring machine when the cutterhead is at its maximum diameter change provided for this application;

[0023] Figure 3 This is a front view of the cutterhead provided in this application when the diameter is at its minimum;

[0024] Figure 4 This is a front view of the cutter disc provided in this application when the diameter is changed to the maximum.

[0025] Reference numerals:

[0026] 100-center cutter head; 110-mounting seat;

[0027] 200-variable cutterhead; 210-variable cutterhead body; 220-drive assembly; 221-swivel joint;

[0028] 300-connecting piece; 310-connecting plate; 320-connecting leg;

[0029] 400-main drive;

[0030] 500-first shield;

[0031] 600-Second shield;

[0032] A-the angle between the variable diameter cutter head body and the central axis of the central cutter head;

[0033] B-Rotation direction of the variable diameter cutter head body.

[0034] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0035] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0036] First, let’s explain the terms used in this application:

[0037] A rotary joint is a mechanical device typically used to transfer fluids (such as liquids or gases) through rotating equipment while allowing the equipment to rotate freely. Its structure typically consists of a stationary housing, a rotor connected to the rotating part of the equipment, seals, and bearings. Seals prevent fluid leakage, while bearings support the rotor and reduce friction. Through internal fluid channels, rotary joints transfer fluid from the stationary part to the rotating part. These devices are widely used in industrial equipment that requires fluid transfer during rotation, ensuring efficient and reliable operation.

[0038] Figure 1 This is a schematic diagram of the longitudinal section of the tunnel boring machine when the cutterhead is at its minimum diameter change provided in this application. Figure 2 The longitudinal section diagram of the tunnel boring machine when the cutterhead is at its maximum diameter change is provided for this application, as shown in FIG. Figure 1 、 Figure 2 As shown, the specific application scenario of this application is a tunnel whose hole diameter needs to be adjusted during the construction process.

[0039] In combination with the above scenario, it can be seen that in the existing technology, the diameter change requirement is achieved by designing multiple variable-diameter segmented cutterheads, and the segmented cutterheads are moved and installed in the tunnel to change the diameter of the cutterhead. This technical solution requires excavating an operating space that exceeds the original tunnel size in the construction tunnel in order to disassemble and adjust the cutterhead. There are technical problems such as time-consuming operation, high cost and high difficulty.

[0040] The present application provides a cutterhead and a tunnel boring machine, including a center cutterhead and a variable diameter cutterhead. The variable diameter cutterhead includes a variable diameter cutterhead body and a drive assembly. The technical means of installing the variable diameter cutterhead body on the edge of the center cutterhead, driving the variable diameter cutterhead body to rotate by the drive assembly, and adjusting the angle between the variable diameter cutterhead body and the central axis of the center cutterhead within a preset range solves the technical problems of inconvenient and time-consuming disassembly and adjustment of the cutterhead.

[0041] The following specific embodiments describe in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0042] Figure 1 This is a schematic diagram of the longitudinal section of a tunnel boring machine with the cutterhead at its minimum diameter change provided in this application. Figure 2 This is a schematic diagram of the longitudinal section of a tunnel boring machine when the cutterhead is at its maximum diameter change provided in this application.

[0043] In some embodiments of the present application, Figure 1 、 Figure 2As shown, the cutter disc includes a central cutter disc 100 and a variable diameter cutter disc 200. The variable diameter cutter disc 200 includes a variable diameter cutter disc body 210 and a drive assembly 220. The variable diameter cutter disc body 210 is located at the edge of the central cutter disc 100 and is rotationally connected to the central cutter disc 100. The drive assembly 220 drives the variable diameter cutter disc body 210 to rotate to adjust the angle between the variable diameter cutter disc body 210 and the central axis of the central cutter disc 100 within a preset range.

[0044] The variable diameter cutter head body 210 rotates on the side of the central cutter head 100 away from the excavation direction, and the variable diameter cutter head body 210 rotates along the direction B. Figure 1 As shown, the drive assembly 220 is at the retraction limit, the variable diameter cutterhead body 210 is located on the side of the center cutterhead 100 away from the excavation direction, and the angle A between the variable diameter cutterhead body 210 and the central axis of the center cutterhead 100 is an acute angle, which is the minimum angle within the preset range. At this time, the cutterhead excavation diameter is the smallest; Figure 2 As shown, when the cutting surface of the variable diameter cutter disc body 210 rotates to the same horizontal plane as the cutting surface of the center cutter disc 100, that is, the angle A between the center axis of the variable diameter cutter disc body 210 and the center cutter disc 100 is 90°, it is the maximum angle within the preset range, and the excavation diameter of the cutter disc is the largest at this time.

[0045] For example, when the diameter of the variable diameter cutter disc body 210 is L, the diameter of the center cutter disc 100 is l, and the angle A between the center axis of the variable diameter cutter disc body 210 and the center cutter disc 100 is the minimum angle, the cutter disc excavation diameter is l+L*sinA, and the excavation diameter is the smallest at this time; when the angle A between the center axis of the variable diameter cutter disc body 210 and the center cutter disc 100 is 90°, the cutter disc excavation diameter is l+L*sin90°=l+L, and the excavation diameter is the largest at this time.

[0046] Exemplarily, the variable diameter cutter disc body 210 may be a spoke arm that is rotatably connected to the edge of the center cutter disc 100, and the drive assembly 220 drives the spoke arm to rotate so that the spoke arm adjusts the angle relative to the central axis of the center cutter disc 100 within a preset range.

[0047] Furthermore, the drive assembly 220 can drive the spoke arm electrically, pneumatically, or mechanically. For example, the pivoting jib can be driven by a variable-pitch mechanism, such as an electric cylinder, pneumatic cylinder, mechanical linkage, or threaded screw. By precisely adjusting the drive assembly 220, operators can flexibly adjust the cutterhead's operating state based on the specific requirements of the construction site, thereby optimizing tunneling efficiency and quality.

[0048] Furthermore, in the excavation direction, the center cutter disc 100 and the variable diameter cutter disc body 210 are both installed with cutting tools on the side close to the excavation direction, wherein the cutting tools can be roller cutters and cutting knives, or they can be shell cutters, tooth cutters and other targeted excavation tools suitable for any stratum, and this application does not impose any restrictions on this.

[0049] The present application utilizes the adjustability of the variable diameter cutterhead 200 to enable the cutterhead to adapt to the excavation requirements of tunnels of different diameters, thereby improving the versatility and adaptability of the cutterhead, reducing the frequency of cutterhead replacement and adjustment, and saving construction time and costs.

[0050] Figure 3 This is a front view of the cutter head with the minimum diameter change provided in this application. Figure 4 This is a front view of the cutter disc provided in this application when the diameter is changed to the maximum.

[0051] In some embodiments of the present application, Figure 3 、 Figure 4 As shown, a plurality of variable diameter cutter discs 200 are provided, and the plurality of variable diameter cutter discs 200 are evenly arranged around the circumference of the central cutter disc 100 .

[0052] Exemplarily, the cutter disc can be a heavy steel structure with multiple spokes, and the variable diameter cutter disc 200 can be a multi-spoke arm structure such as four-spoke arms, five-spoke arms, six-spoke arms or eight-spoke arms, and each spoke arm is provided with a corresponding drive assembly 220 for driving the spoke arm to rotate.

[0053] The multi-spoke arm structure can optimize the cutting process, allowing the cutterhead to contact and cut the material more effectively during rotation, thereby improving work efficiency and cutting quality. The steel structure can bear greater loads and stresses, has a long service life, and low maintenance costs.

[0054] Furthermore, multiple spokes are evenly arranged around the circumference of the central cutterhead 100. The evenly distributed spokes can effectively balance and disperse the external forces applied to the cutterhead, enhance the stability and deformation resistance of the overall structure, help maintain the balance of the cutterhead during operation, reduce vibration and deviation, and reduce local stress concentration, thereby reducing wear and fatigue damage and extending the service life of the cutterhead.

[0055] In some embodiments of the present application, a mounting seat 110 is provided at the edge of the central cutter disc 100 , and the variable diameter cutter disc 200 is rotatably connected to the mounting seat 110 .

[0056] Exemplarily, the mounting seat 110 is located at the edge of the central cutter head 100 to provide sufficient support and rotation space for the variable diameter cutter head 200, ensuring that the variable diameter cutter head 200 can freely adjust the angle within a predetermined range.

[0057] Furthermore, the mounting seat 110 can be installed on the center cutter disc 100 through an integrated design, for example, fixed to the center cutter disc 100 by welding. The integrated design has higher structural integrity and higher strength and rigidity. The mounting seat 110 can also be installed on the center cutter disc 100 through a modular design, for example, fixed to the center cutter disc 100 by fasteners such as bolts. The detachable connection is more convenient for maintenance, inspection and replacement, reducing downtime.

[0058] Preferably, the mounting base 110 is made of high-strength material, such as steel or alloy, to ensure its durability and fatigue resistance.

[0059] In some embodiments of the present application, the variable diameter cutter head 200 and the mounting seat 110 are rotatably connected via a pin.

[0060] In some embodiments of the present application, the cutter disc also includes a connecting member 300, which includes a connecting plate 310 and a connecting leg 320; one end of the connecting leg 320 is connected to the connecting plate 310, and the other end is connected to the center cutter disc 100, and the side of the connecting plate 310 facing away from the connection with the connecting leg 320 is connected to the tunnel boring machine body.

[0061] Illustratively, the connector 300 may be integrally formed or detachably connected.

[0062] Exemplarily, the connecting member 300 may include a connecting leg 320, which is coaxially arranged with the connecting plate 310, one end of the connecting leg 320 is connected to the connecting plate 310, and the other end is connected to the center cutter head 100, and the side of the connecting plate 310 facing away from the connection with the connecting leg 320 is connected to the tunnel boring machine body.

[0063] Preferably, the connecting member 300 may also include a plurality of connecting legs 320, which are evenly arranged on the connecting plate 310, one end of which is connected to the connecting plate 310, and the other end of which is connected to the center cutter disc 100, and the connecting plate 310 is connected to the tunnel boring machine body on the side facing away from the side connected to the connecting legs 320.

[0064] Exemplarily, the connecting member 300 may be a leg flange, which includes a leg and a flange. The flange generally has evenly distributed bolt holes for connecting the leg to the tunnel boring machine body. One end of the leg can be connected to the center cutter head 100 by welding, and the other end is connected to the flange by bolting. The side of the flange facing away from the leg also has bolt holes, which is connected to the tunnel boring machine body by bolting. The flange can effectively transmit and distribute the force applied to the leg, reduce local stress concentration, help improve the strength and durability of the connection, and prevent structural failure caused by stress concentration. The flange connection is generally designed to be detachable, so that it can be easily disassembled and reinstalled when maintenance, overhaul or replacement of parts is required, reducing downtime and maintenance costs, and ensuring the stability, reliability and maintainability of the entire machine.

[0065] In some embodiments of the present application, the driving assembly 220 is disposed on the connecting leg 320 .

[0066] In some embodiments of the present application, one end of the driving assembly 220 is rotatably connected to the variable diameter cutter head body 210 , and the other end is rotatably connected to the connecting leg 320 .

[0067] For example, a second mounting seat is provided on the connecting leg 320, and the input end of the drive assembly 220 is rotatably connected to the second mounting seat. Similarly, a second mounting seat is provided on the side of the variable diameter cutterhead body 210 facing away from the cutting tool, and the output end of the drive assembly 220 is rotatably connected to the second mounting seat. The drive assembly 220 drives the variable diameter cutterhead body 210 to rotate. By controlling the extension and retraction length of the drive assembly 220, the cutterhead can be quickly adjusted between the minimum and maximum excavation diameters without replacing cutterhead components.

[0068] For example, the second mounting seat may be connected to the connecting leg 320 and the reduced-diameter cutter head body 210 respectively by welding.

[0069] Exemplarily, both ends of the driving assembly 220 are connected to the second mounting seat via pins.

[0070] In some embodiments of the present application, the drive assembly 220 is an oil cylinder, and the drive assembly 220 also includes a rotary joint 221, which is connected to the oil cylinder through a pipeline. The rotary joint 221 is also used to connect to an energy supply device that provides hydraulic oil through a pipeline.

[0071] Exemplarily, one end of the rotary joint 221 is connected to the energy supply equipment through a pipeline. For example, one end of the rotary joint 221 is connected to the hydraulic pump, and the other end is connected to the oil cylinder through a pipeline. The hydraulic oil flowing out of the hydraulic pump enters the inlet of the rotary joint 221 through the pipeline, and the hydraulic oil flowing out of the rotary joint 221 enters the oil inlet of the oil cylinder through the pipeline, providing power for the extension and retraction of the oil cylinder.

[0072] Similarly, drive assembly 220 can also be a cylinder, powered by an air compressor that provides compressed air as a power source. The compressed air from the air compressor is connected via an air pipe to the inlet of rotary joint 221. The compressed air from rotary joint 221 is then connected via an air pipe to the air inlet of the cylinder, pushing the cylinder to complete its extension and retraction motion. Furthermore, the cylinder's air inlet line is typically equipped with a control valve to control the cylinder's movement.

[0073] By using the rotary joint 221, seamless transmission of hydraulic oil or compressed air is allowed, ensuring continuous telescopic movement of the drive assembly 220, thereby improving excavation efficiency and system reliability.

[0074] Furthermore, the use of the swivel joint 221 simplifies piping layout, reduces wear and leakage risks, and further enhances equipment durability and ease of maintenance. This flexible fluid transfer mechanism enables the roadheader to maintain efficient operation in changing construction environments.

[0075] The present application also provides a tunnel boring machine, including a cutterhead, a main drive 400 and a machine body. The main drive 400 is arranged on the machine body, the cutterhead and the main drive 400 are connected, and the main drive 400 drives the cutterhead to rotate.

[0076] Exemplarily, the roadheader includes a cutterhead, a main drive 400 and a machine body. The main drive 400 is provided on the machine body. The cutterhead and the main drive 400 are connected. The main drive 400 drives the cutterhead to rotate.

[0077] The cutterhead includes a central cutterhead 100, a variable diameter cutterhead 200, and a connector 300. The variable diameter cutterhead 200 includes a variable diameter cutterhead body 210 and a drive assembly 220. The connector 300 includes a connecting leg 320 and a connecting plate 310. The connecting leg 320 is connected to the central cutterhead 100 at one end and to the connecting plate 310 at the other end. The side of the connecting plate 310 facing away from the connecting leg 320 is connected to the machine body. A mounting seat 110 is provided at the edge of the central cutterhead 100, and the variable diameter cutterhead body 210 is rotatably connected to the mounting seat 110 via a pin. A second mounting seat is installed on the side of the variable diameter cutterhead body 210 facing away from the cutting tool. The connecting leg 320 also has a second mounting seat. The output end of the drive assembly 220 is rotatably connected to the second mounting seat on the variable diameter cutterhead body 210, and the input end of the drive assembly 220 is connected to the second mounting seat on the connecting leg 320.

[0078] A rotary joint 221 is installed at the center of the connecting plate 310. When the driving component 220 is a cylinder, one end of the rotary joint 221 is connected to the hydraulic pump through a pipeline. The hydraulic pump provides hydraulic oil, which flows into the rotary joint 221. The other end of the rotary joint 221 is connected to the cylinder through a pipeline. The hydraulic oil flows from the rotary joint 221 to the cylinder to provide power.

[0079] When the cylinder is at its retraction limit, the angle between the adjustable cutterhead 200 and the central axis of the center cutterhead 100 is minimal, and the cutterhead is at its minimum diameter. When the cylinder extends, the adjustable cutterhead 200 rotates in direction B. When the angle A between the adjustable cutterhead 200 and the central axis of the center cutterhead 100 reaches 90°, the angle reaches its maximum, and the adjustable cutterhead 200 and the center cutterhead 100 are in the same plane, and the cutterhead is at its maximum diameter. By controlling the extension and retraction length of the cylinder, the cutterhead can be quickly adjusted between the minimum and maximum excavation diameters without replacing cutterhead components.

[0080] By controlling the extension and retraction length of the oil cylinder, the cutterhead can be quickly adjusted from minimum to maximum excavation diameter without replacing any cutterhead parts. This flexible diameter adjustment capability allows the cutterhead to adapt to different construction requirements, improving work efficiency and adaptability.

[0081] The main drive 400 is connected to the cutterhead through the connecting piece 300. The main drive 400 drives the cutterhead to rotate and perform excavation. Since the connecting leg 320 is connected to the central cutterhead 100, the main drive 400 can continuously provide power for the cutterhead excavation regardless of how the cutterhead diameter changes, ensuring the continuity and efficiency of the excavation process.

[0082] This design not only simplifies the operating process, but also reduces downtime and maintenance costs, improving overall construction efficiency and equipment reliability.

[0083] In some embodiments of the present application, the machine body further includes a first shield body 500 and a second shield body 600, the main drive 400 is installed inside the first shield body 500, and the second shield body 600 is arranged around the circumference of the first shield body 500 and is detachably connected to the first shield body 500.

[0084] For example, when the excavation diameter of the cutter disc is the minimum diameter, only the first shield body 500 can be used, and the main drive 400 is installed inside the first shield body 500 and connected to the central cutter disc 100; according to the on-site construction requirements, when the excavation diameter of the cutter disc becomes larger, the second shield body 600 of the appropriate diameter is matched according to the excavation diameter.

[0085] Furthermore, the first shield body 500 and the second shield body 600 are detachably connected, for example, by bolts. The detachable connection makes maintenance and inspection more convenient. The operator can easily remove the second shield body 600 and quickly inspect and maintain the main drive 400 located inside the first shield body 500.

[0086] Furthermore, the second shield 600, surrounding the first shield 500, further enhances the overall structure's protective capabilities, effectively resisting environmental influences and improving the durability and reliability of the device. This modular design not only simplifies installation and maintenance but also enhances the system's flexibility and adaptability.

[0087] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0088] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0089] Finally, it should be noted that those skilled in the art will readily identify other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed herein. The present invention is not limited to the precise structure described above and illustrated in the accompanying drawings, and various modifications and variations may be made without departing from the scope thereof. The scope of the present invention is limited solely by the appended claims.

Claims

1. A cutter head, characterized in that: include: Center cutter head (100); A variable diameter cutter disc (200) comprising a variable diameter cutter disc body (210) and a drive assembly (220), wherein the variable diameter cutter disc body (210) is located at the edge of the central cutter disc (100) and is rotatably connected to the central cutter disc (100); the drive assembly (220) is used to drive the variable diameter cutter disc body (210) to rotate so as to adjust the angle between the variable diameter cutter disc body (210) and the central axis of the central cutter disc (100) within a preset range.

2. The cutter head according to claim 1, characterized in that A plurality of the variable diameter cutter discs (200) are provided, and the plurality of variable diameter cutter discs (200) are evenly arranged around the circumference of the central cutter disc (100).

3. The cutter head according to claim 1, characterized in that A mounting seat (110) is provided on the edge of the central cutter disc (100), and the variable diameter cutter disc (200) is rotatably connected to the mounting seat (110).

4. The cutter head according to claim 3, characterized in that The variable diameter cutter disc (200) and the mounting seat (110) are rotatably connected via a pin shaft.

5. The cutter head according to claim 1, characterized in that Also includes: A connecting member (300) is provided with a connecting plate (310) and a connecting leg (320), one end of the connecting leg (320) is connected to the connecting plate (310), and the other end is connected to the central cutter head (100), and the side of the connecting plate (310) facing away from the side connected to the connecting leg (320) is connected to the tunnel boring machine body.

6. The cutter head according to claim 1, characterized in that The driving assembly (220) is arranged on the connecting leg (320).

7. The cutter head according to claim 6, characterized in that One end of the driving assembly (220) is rotatably connected to the variable diameter cutter head body (210), and the other end is rotatably connected to the connecting leg (320).

8. The cutter head according to claim 7, characterized in that The driving assembly (220) is an oil cylinder. The driving assembly (220) further comprises a rotary joint (221). The rotary joint (221) is connected to the oil cylinder via a pipeline. The rotary joint (221) is also used to connect to an energy supply device that provides hydraulic oil via a pipeline.

9. A tunnel boring machine, characterized in that: The invention comprises a cutter disc according to any one of claims 1 to 8, a main drive (400) and a machine body, wherein the main drive (400) is arranged on the machine body, the cutter disc is connected to the main drive (400), and the main drive (400) drives the cutter disc to rotate.

10. The tunnel boring machine according to claim 9, characterized in that: The body further comprises: a first shield body (500), wherein the main drive (400) is installed inside the first shield body (500); A second shield body (600), the second shield body (600) is arranged around the circumference of the first shield body (500) and is detachably connected to the first shield body (500).

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