A cutter head of a tunnel boring machine

Abstract

The utility model discloses a kind of cutterheads of tunnel boring machine, including several cutting hob, cutterhead main body, limit block and locking block, cutting hob two sides center of circle is provided with connecting shank, and first shank abutting surface is equipped in connecting shank lower side;Cutterhead main body is equipped with several installation parts, installation part has upper surface and lower surface and the installation through-hole of through installation part, the installation groove of ''L'' type is opened in the opposite two side walls of installation through-hole, and the opening of installation groove extends to lower surface, connecting shank is detachably inserted in installation groove, and first shank abutting surface is abutted in the inner wall of installation groove away from upper surface;Limit block and locking block are set in installation groove and respectively abutted in connecting shank front and back two sides.

Description

Technical Field

[0001] This utility model relates to the field of tunnel boring machine technology, and in particular to a cutterhead for a tunnel boring machine. Background Technology

[0002] With the sustained and stable growth of my country's economy and the further acceleration of urbanization, a large number of underground pipeline laying, replacement, and repair projects have emerged, necessitating the construction of numerous tunnels. During the tunnel excavation process, the role of tunnel boring machines (TBMs) becomes exceptionally prominent.

[0003] However, existing tunnel boring machines (TBMs) have certain problems. For example, their cutterhead structure is prone to wear. This is because the cutterheads of existing TBMs typically require a limiting block to lock the cutterhead handle. However, for ease of installation, the limiting block is usually angled and abuts against the cutterhead handle. During the TBM's tunneling operation, the cutterhead cuts through the soil and rock, and the forces exerted on the cutterhead by the soil and rock are transmitted to the limiting block, easily causing wear on both the limiting block and the cutterhead handle, thus shortening the product's service life. Furthermore, because the normal direction of the plane in contact with the cutter head is at an angle to the direction of the force, the limit block and the cutter head are more prone to relative displacement, further aggravating wear. This necessitates frequent cutter head replacements, impacting the progress of tunnel excavation. Some cutterheads are equipped with a detachable cutter holder to fix the limit block and replace it when it wears out. However, such products result in an excessively thin main structure between adjacent cutter holder mounting points, affecting the overall strength of the product.

[0004] Therefore, this utility model provides a tool holder that can effectively solve the above problems. It has a simple structure, balanced force, effectively reduces wear, and improves the service life of the product. Utility Model Content

[0005] To overcome the shortcomings of the existing technology, this utility model provides a tool holder with a simple structure, balanced force, effectively reducing wear and improving the service life of the product.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A cutterhead for a tunnel boring machine is provided, comprising:

[0008] A plurality of cutting hobs, wherein a connecting shank is provided at the center of both sides of the cutting hob, and a first shank abutment surface is provided on the lower side of the connecting shank;

[0009] The cutter head body has several mounting portions, each mounting portion having an upper surface and a lower surface, and a mounting through hole penetrating the mounting portion. An "L"-shaped mounting groove is formed on two opposite side walls of the mounting through hole, and the opening of the mounting groove extends to the lower surface. The connecting handle is detachably inserted into the mounting groove, and the first handle abutting surface abuts against the inner wall of the mounting groove away from the upper surface.

[0010] A limiting block and a locking block are provided in the mounting groove and respectively abut against the front and rear sides of the connecting tool holder.

[0011] As an improvement of this utility model, the mounting groove includes a limiting groove unit and an insertion groove unit with the opening. The connecting knife handle can be inserted into the insertion groove unit along the opening and moved laterally into the limiting groove unit. The first knife handle abutting surface abuts against the lower wall of the limiting groove unit.

[0012] As an improvement of this utility model, the limiting block is disposed on the side of the limiting groove unit away from the insertion groove unit, the connecting knife handle is inserted into the insertion groove unit and abuts against the limiting block, and the locking block is inserted into the insertion groove unit along the opening and abuts against the connecting knife handle.

[0013] As an improvement of this utility model, the limiting block is provided with a first threaded hole, and the lower surface is provided with a first through hole communicating with the limiting groove unit. The first through hole is used for the threaded end of the first threaded component to pass through, and the first threaded hole is used for threaded connection to the threaded end of the first threaded component.

[0014] As an improvement of this utility model, the locking block is provided with a second through hole, and the cutter head body is provided with a second threaded hole communicating with the insertion slot unit. The second through hole is used for the threaded end of the second threaded component to pass through, and the second threaded hole is used for threaded connection to the threaded end of the second threaded component.

[0015] As an improvement of this utility model, the limiting block is provided with a first limiting abutment surface and a second limiting abutment surface, and the connecting knife handle is also provided with a second knife handle abutment surface. The first limiting abutment surface abuts against the side wall of the limiting groove unit, and the second limiting abutment surface abuts against the second knife handle abutment surface.

[0016] As an improvement of this utility model, the locking block is provided with a first locking abutment surface, a second locking abutment surface and a third locking abutment surface, and the connecting knife handle is also provided with a third knife handle abutment surface. The first locking abutment surface abuts against the side wall of the insertion slot unit, the second locking abutment surface abuts against the top wall of the insertion slot unit, and the third locking abutment surface abuts against the third knife handle abutment surface.

[0017] As an improvement of this utility model, the first limiting contact surface, the second limiting contact surface, and the upper and lower surfaces of the limiting block form a right-angled trapezoid that is wider at the top and narrower at the bottom, and the second limiting contact surface is an inclined surface with its upper end facing the connecting handle.

[0018] As an improvement of this utility model, two inclined first guide surfaces are provided on both sides of the first limiting contact surface.

[0019] As an improvement of this utility model, the connecting handle is provided with a second guide surface, which is located between the first handle abutment surface and the second handle abutment surface and is inclined.

[0020] As an improvement of this utility model, the locking block is provided with two third guide surfaces, which are respectively located on both sides of the second locking abutment surface, so that the locking block has a structure that is narrow at the top and wide at the bottom.

[0021] The beneficial effects of this utility model are as follows: With the above-mentioned structure, when assembling the product, the connecting handle, limiting block, and locking block are inserted into the "L"-shaped mounting groove. The limiting block and locking block abut against both sides of the connecting handle to fix the connecting handle and improve the stability of the product. The mounting groove is "L"-shaped, and the first handle abutting surface abuts against the lower inner wall of the mounting groove. When the product is in use, the cutter head moves forward and the cutting roller rotates to cut soil and rock, effectively realizing tunneling work. When the cutting roller is performing cutting operations, the force it receives is mainly transmitted through the first handle abutting surface to the lower inner wall of the mounting groove, and finally transmitted to the cutter head body through the cutter box housing. The force transmission is balanced, which can effectively prevent relative movement between the connecting handle and the inner wall of the mounting groove, the limiting block, and the locking block, reduce wear caused by friction, and improve the service life of the product. The lower inner wall of the mounting groove is relatively thick, making it less prone to breakage and ensuring strong product stability. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the following description of the embodiments will be briefly introduced. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a schematic diagram of the overall structure of the cutter head of this utility model at one angle;

[0025] Figure 2 This is a schematic diagram of the overall structure of the cutter head of this utility model from another angle;

[0026] Figure 3 This is an exploded structural diagram of the cutter head of this utility model at one angle;

[0027] Figure 4 This is an exploded structural diagram of the cutter head of this utility model from another angle;

[0028] Figure 5 This is a cross-sectional view of the cutter head of this utility model;

[0029] Figure 6 yes Figure 5 Enlarged view of point A in the middle circle;

[0030] Figure 7 This is a schematic diagram of the assembled state of the cutter head of this utility model.

[0031] Explanation of reference numerals in the attached figures:

[0032] 100. Cutting hob; 110. Connecting tool holder; 111. First tool holder abutment surface; 112. Second tool holder abutment surface; 113. Third tool holder abutment surface; 114. Second guide surface; 200. Tool head body; 201. Upper surface; 202. Lower surface; 203. Mounting through hole; 204. First through hole; 205. Second threaded hole; 210. Mounting groove; 211. Limiting groove unit; 212. Insertion groove unit; 213. Opening; 300. Limiting block; 301. First threaded hole; 302. First limiting abutment surface; 303. Second limiting abutment surface; 304. First guide surface; 400. Locking block; 401. Second through hole; 402. First locking abutment surface; 403. Second locking abutment surface; 404. Third locking abutment surface; 405. Third guide surface. Detailed Implementation

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] Reference Figures 1 to 7 A cutterhead for a tunnel boring machine, comprising:

[0040] A plurality of cutting hobs 100, wherein a connecting shank 110 is provided at the center of both sides of the cutting hob 100, and a first shank abutment surface 111 is provided on the lower side of the connecting shank 110.

[0041] The cutter head body 200 is provided with a plurality of mounting portions. Each mounting portion has an upper surface 201 and a lower surface 202, as well as a mounting through hole 203 penetrating the mounting portion. An "L"-shaped mounting groove 210 is formed on two opposite side walls of the mounting through hole 203, and the opening 213 of the mounting groove 210 extends to the lower surface 202. The connecting handle 110 is detachably inserted into the mounting groove 210, and the first handle abutting surface 111 abuts against the inner wall of the mounting groove 210 away from the upper surface 201.

[0042] Limiting block 300 and locking block 400 are disposed in the mounting groove 210 and respectively abut against the front and rear sides of the connecting handle 110.

[0043] With the above-described structure, during product assembly, the limiting block 300, connecting handle 110, and locking block 400 are sequentially inserted into the "L"-shaped mounting groove 210. The limiting block 300 and locking block 400 abut against both sides of the connecting handle 110 to fix the connecting handle 110 in the front-back direction, improving the product's stability. The mounting groove 210 is "L"-shaped, with the first handle abutting surface 111 abutting against the lower inner wall of the mounting groove 210. During product use, the cutterhead is driven forward by the tunnel boring machine and pipeline, while the cutter holder cuts through the soil. Rock cutting effectively enables tunneling operations; while the cutting hob 100, during cutting operations, experiences forces primarily through the first cutter shank abutment surface 111, which acts approximately perpendicularly on the lower inner wall of the mounting groove 210, ultimately distributing the force evenly across the entire cutterhead body 200. This balanced force transmission effectively prevents relative movement between the connecting cutter shank 110 and the inner wall of the mounting groove 210, the limiting block 300, and the locking block 400, reducing friction-induced wear and extending the product's service life. Furthermore, the lower inner wall of the mounting groove 210 is relatively thick, making it less prone to breakage and ensuring strong product stability.

[0044] In this embodiment, the mounting groove 210 includes a limiting groove unit 211 and an insertion groove unit 212 with the opening 213. The connecting knife handle 110 can be inserted into the insertion groove unit 212 along the opening 213 and moved laterally into the limiting groove unit 211. The first knife handle abutting surface 111 abuts against the lower wall of the limiting groove unit 211. With the above structure, during product assembly, the limiting block 300 and the connecting tool holder 110 are first inserted into the insertion slot unit 212 along the opening 213, and then moved laterally into the limiting slot unit 211. The locking block 400 is then inserted into the insertion slot unit 212 along the opening 213. The limiting block 300 and the locking block 400 are respectively connected to both sides of the connecting tool holder 110. The connecting tool holder 110 is stably set in the limiting slot unit 211, and the first tool holder abutment surface 111 abuts against the lower wall of the limiting slot unit 211, which can stably support the connecting tool holder 110. Most of the force on the cutting hob 100 is applied vertically to the limiting slot unit 211. The lower wall of the cutter head is evenly stressed, which effectively reduces the relative translation between the connecting handle 110 and the lower wall of the limiting groove unit 211, effectively reducing frictional losses and improving the service life of the product. Moreover, the opening 213 is set on the lower surface 202 of the cutter head body 200, that is, the opening 213 is set towards the inside of the cutter head body 200. During the tunneling operation, once the cutting hob 100 on the cutter head is worn, the user can enter the passage inside the tunnel boring machine and take out the locking block 400, the connecting handle 110 and the limiting block 300 in sequence, so that the cutting hob 100 can be disassembled and replaced. This enables quick disassembly and assembly of the cutting hob 100, reduces maintenance time and improves construction efficiency.

[0045] In this embodiment, the limiting block 300 is disposed on the side of the limiting groove unit 211 away from the insertion groove unit 212, the connecting handle 110 is inserted into the insertion groove unit 212 and abuts against the limiting block 300, and the locking block 400 is inserted into the insertion groove unit 212 along the opening 213 and abuts against the connecting handle 110. With the above structure, when assembling the product, the limiting block 300 is first inserted into the insertion slot unit 212 along the opening 213 and then moved laterally into the limiting slot unit 211 until it abuts against the end wall of the limiting slot unit 211. Then, the connecting knife handle 110 is inserted into the insertion slot unit 212 along the opening 213 and moved laterally into the limiting slot unit 211, so that the connecting knife handle 110 abuts against the limiting block 300. Finally, the locking block 400 is inserted into the insertion slot unit 212 along the opening 213, so that the locking block 400 abuts against the connecting knife handle 110. This can effectively fix the connecting knife handle 110 in the length direction of the limiting slot unit 211, further hindering the relative translation between the connecting knife handle 110 and the lower wall of the limiting slot unit 211, effectively reducing the wear caused by friction, improving the service life of the product, and making the product structure more stable.

[0046] In this embodiment, the limiting block 300 is provided with a first threaded hole 301, and the lower surface 202 is provided with a first through hole 204 communicating with the limiting groove unit 211. The first through hole 204 is used for the threaded end of the first threaded component to pass through, and the first threaded hole 301 is used for threaded connection to the threaded end of the first threaded component. With the above structure, when assembling the product, passing the threaded end of the first threaded component through the first through hole 204 and threadedly connecting it to the first threaded hole 301 can effectively fix the limiting block 300, preventing the lateral movement of the limiting block 300. Furthermore, as the first threaded component is tightened, it can also prevent the limiting block 300 from moving in the extension direction of the first threaded hole 301, ensuring the stability of the product and improving its service life.

[0047] In this embodiment, the locking block 400 is provided with a second through hole 401, and the cutter head body 200 is provided with a second threaded hole 205 communicating with the insertion slot unit 212. The second through hole 401 is used for the threaded end of the second threaded component to pass through, and the second threaded hole 205 is used for threaded connection to the threaded end of the second threaded component. With the above structure, when assembling the product, the threaded end of the second threaded component passes through the second through hole 401 and is threadedly connected to the second threaded hole 205, which can fix the locking block 400 and prevent relative movement of the locking block 400. This allows the locking block 400 to stably abut against and fix the tool holder 110, improving the stability of the product and enabling the cutting hob 100 to be stably stressed, thus improving the cutting effect.

[0048] In this embodiment, the limiting block 300 is provided with a first limiting abutment surface 302 and a second limiting abutment surface 303, and the connecting handle 110 is also provided with a second handle abutment surface 112. The first limiting abutment surface 302 abuts against the side wall of the limiting groove unit 211, and the second limiting abutment surface 303 abuts against the second handle abutment surface 112. Through the above structural arrangement, the first limiting abutment surface 302 abuts against the side wall of the limiting groove unit 211, allowing the lateral force transmitted from the connecting handle 110 to the limiting block 300 to act substantially perpendicularly against the side wall of the limiting groove unit 211. This ensures stable force distribution throughout the product, prevents excessive lateral force on the limiting block 300, reduces the lateral shear force on the first threaded component, and guarantees product stability. Furthermore, the first limiting contact surface 302, the second limiting contact surface 303, the second tool holder contact surface 112, and the side wall of the limiting groove unit 211 are all flat, which increases the contact area between the first limiting contact surface 302 and the side wall of the limiting groove unit 211, as well as the second limiting contact surface 303 and the second tool holder contact surface 112. This increases friction while reducing pressure at various points, further ensuring the stability of the product.

[0049] In this embodiment, the locking block 400 is provided with a first locking abutment surface 402, a second locking abutment surface 403 and a third locking abutment surface 404, and the connecting handle 110 is also provided with a third handle abutment surface 113. The first locking abutment surface 402 abuts against the side wall of the insertion slot unit 212, the second locking abutment surface 403 abuts against the top wall of the insertion slot unit 212, and the third locking abutment surface 404 abuts against the third handle abutment surface 113. With the above-described structure, the first locking abutment surface 402 and the second locking abutment surface 403 abut against the side wall and top wall of the insertion slot unit 212, respectively, so that the locking block 400 is fixed at the corner of the insertion slot unit 212, and the locking block 400 can obtain stable support force in both the lateral and longitudinal directions. The third locking abutment surface 404 abuts against the third tool holder abutment surface 113, so that the locking block 400 can stably abut against and fix the tool holder 110, further limiting the lateral movement of the tool holder 110. Furthermore, the first locking... The abutment surface 402, the second locking abutment surface 403, the third locking abutment surface 404, the third tool holder abutment surface 113, the side wall of the insertion slot unit 212, and the top wall of the insertion slot unit 212 are all flat, which increases the contact area between the first locking abutment surface 402 and the side wall of the insertion slot unit 212, the second locking abutment surface 403 and the top wall of the insertion slot unit 212, and the third locking abutment surface 404 and the third tool holder abutment surface 113. This increases the friction while reducing the pressure at various points, further ensuring the stability of the product.

[0050] In this embodiment, the first limiting abutment surface 302, the second limiting abutment surface 303, and the upper and lower surfaces of the limiting block 300 form a right-angled trapezoid that is wider at the top and narrower at the bottom. The second limiting abutment surface 303 is an inclined surface with its upper end facing the connecting handle 110. With the above structural arrangement, the second limiting abutment surface 303 is inclined, with its upper end facing the insertion slot unit 212. Correspondingly, the second handle abutment surface 112 is also inclined, with its lower end facing the insertion slot unit 212. When the second limiting abutment surface 303 abuts against the second handle abutment surface 112, the force applied by the connecting handle 110 to the limiting block 300 can be decomposed into a horizontal component and a vertical component. The horizontal component force on the limiting block 300 is transmitted to the side wall of the limiting slot unit 211, while the vertical component force on the limiting block 300 is transmitted to the side wall of the limiting slot unit 211. The vertical force is transmitted to the first threaded component, and the direction of the vertical force is approximately the same as the extension direction of the first threaded component, which effectively reduces the shear force acting on the first threaded component, prevents the first threaded component from breaking, and stabilizes the product structure. Furthermore, when the limiting block 300, locking block 400, and connecting tool holder 110 wear down, causing gaps between the various parts, the first threaded component can be further tightened, causing the limiting block 300 to move downward, further clamping the limiting block 300 and locking block 400 onto the connecting tool holder 110, improving the stability of the product and extending its service life.

[0051] In this embodiment, two inclined first guide surfaces 304 are provided on both sides of the first limiting abutment surface 302. With the above structure, the two inclined first guide surfaces 304 make the inner end of the limiting block 300 have a trapezoidal structure that is narrow at the front and wide at the back, which makes it smoother to install the limiting block 300 into the limiting groove unit 211 and improves the assembly efficiency.

[0052] In this embodiment, the connecting handle 110 is provided with a second guide surface 114, which is located between the first handle abutment surface 111 and the second handle abutment surface 112 and is inclined. By setting the structure described above, the second guide surface 114 makes the lower part of the connecting handle 110 narrower at the front and wider at the back, resulting in smoother installation of the connecting handle 110 into the limiting groove unit 211 and higher assembly efficiency.

[0053] In this embodiment, the locking block 400 is provided with two third guide surfaces 405, which are respectively located on both sides of the second locking abutment surface 403, so that the locking block 400 has a structure that is narrow at the top and wide at the bottom. With the above structure and the provision of two third guide surfaces 405, the user can more smoothly insert the locking block 400 into the insertion slot unit 212 along the opening 213, which facilitates the user's product assembly.

Claims

1. A cutterhead for a tunnel boring machine, characterized in that, include: A plurality of cutting hobs (100) are provided, wherein a connecting shank (110) is provided at the center of both sides of the cutting hob (100), and a first shank abutment surface (111) is provided on the lower side of the connecting shank (110); The cutter head body (200) is provided with a plurality of mounting portions. Each mounting portion has an upper surface (201) and a lower surface (202) and a mounting through hole (203) penetrating the mounting portion. An "L"-shaped mounting groove (210) is provided on two opposite side walls of the mounting through hole (203), and the opening (213) of the mounting groove (210) extends to the lower surface (202). The connecting handle (110) is detachably inserted into the mounting groove (210), and the first handle abutting surface (111) abuts against the inner wall of the mounting groove (210) away from the upper surface (201). A limiting block (300) and a locking block (400) are provided in the mounting groove (210) and respectively abut against the front and rear sides of the connecting handle (110).

2. The cutterhead of the tunnel boring machine according to claim 1, characterized in that, The mounting groove (210) includes a limiting groove unit (211) and an insertion groove unit (212) having the opening (213). The connecting handle (110) can be inserted into the insertion groove unit (212) along the opening (213) and moved laterally into the limiting groove unit (211). The first handle abutting surface (111) abuts against the lower wall of the limiting groove unit (211).

3. The cutterhead of the tunnel boring machine according to claim 2, characterized in that, The limiting block (300) is disposed on the side of the limiting groove unit (211) away from the insertion groove unit (212), the connecting handle (110) is inserted into the insertion groove unit (212) and abuts against the limiting block (300), and the locking block (400) is inserted into the insertion groove unit (212) along the opening (213) and abuts against the connecting handle (110).

4. The cutterhead of the tunnel boring machine according to claim 3, characterized in that, The limiting block (300) is provided with a first threaded hole (301), and the lower surface (202) is provided with a first through hole (204) communicating with the limiting groove unit (211). The first through hole (204) is used for the threaded end of the first threaded component to pass through, and the first threaded hole (301) is used for threaded connection to the threaded end of the first threaded component.

5. The cutterhead of the tunnel boring machine according to claim 3, characterized in that, The locking block (400) is provided with a second through hole (401), and the cutter head body (200) is provided with a second threaded hole (205) communicating with the insertion slot unit (212). The second through hole (401) is used for the threaded end of the second threaded component to pass through, and the second threaded hole (205) is used for threaded connection to the threaded end of the second threaded component.

6. The cutterhead of the tunnel boring machine according to claim 4, characterized in that, The limiting block (300) is provided with a first limiting abutment surface (302) and a second limiting abutment surface (303), and the connecting handle (110) is also provided with a second handle abutment surface (112). The first limiting abutment surface (302) abuts against the side wall of the limiting groove unit (211), and the second limiting abutment surface (303) abuts against the second handle abutment surface (112).

7. The cutterhead of the tunnel boring machine according to claim 5, characterized in that, The locking block (400) is provided with a first locking abutment surface (402), a second locking abutment surface (403) and a third locking abutment surface (404), and the connecting handle (110) is also provided with a third handle abutment surface (113). The first locking abutment surface (402) abuts against the side wall of the insertion slot unit (212), the second locking abutment surface (403) abuts against the top wall of the insertion slot unit (212), and the third locking abutment surface (404) abuts against the third handle abutment surface (113).

8. The cutterhead of the tunnel boring machine according to claim 6, characterized in that, The first limiting contact surface (302), the second limiting contact surface (303) and the upper and lower surfaces of the limiting block (300) form a right-angled trapezoid that is wider at the top and narrower at the bottom. The second limiting contact surface (303) is an inclined surface with its upper end facing the connecting handle (110).

9. The cutterhead of the tunnel boring machine according to claim 6, characterized in that, Two inclined first guide surfaces (304) are provided on both sides of the first limiting contact surface (302).

10. The cutterhead of the tunnel boring machine according to claim 6, characterized in that, The connecting handle (110) is provided with a second guide surface (114), which is located between the first handle abutment surface (111) and the second handle abutment surface (112) and is inclined.

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