Special impact-resistant shield cutterhead for karst formations

Abstract

The present invention discloses a special impact-resistant shield cutterhead for karst formations, which relates to the technical field of shield cutterheads, including a disc body, on which a cutter is mounted, the position of the cutter being adjusted by an adjustment mechanism, the cutter being installed by an installation mechanism, the adjustment mechanism including a movable groove, the movable groove being opened on the outer wall of the disc body, and the inner wall of the movable groove being provided with three installation frames. The present invention provides an adjustment mechanism, rotates a rotating plate to separate from a baffle, cancels the fixation of the baffle, rotates the baffle to open the movable groove, the baffle rotates to drive the partition to move out from between the two installation frames, and then uses a tool to rotate the rotating disc, the rotation of the rotating disc drives a threaded rod to rotate, and the rotation of the threaded rod drives the upper and lower installation frames to move toward the middle installation frame, so that when the cutter is replaced, the position of the cutter can be moved so that the cutter is close to the operating platform, which facilitates the replacement operation of the cutter.

Description

Technical Field

[0001] The invention relates to the technical field of shield cutter heads, in particular to an impact-resistant shield cutter head specially used for karst strata. Background Art

[0002] Underground karst landforms are primarily caves and underground rivers. Tunneling in this type of stratum causes severe wear on cutting tools. Failure to promptly replace worn cutting tools will shorten the life of the shield machine cutterhead and cause abnormal tunneling parameters, severely impacting construction progress. However, to replace the cutters, the operator must move the cutterhead to an operating platform. This is inconvenient when replacing the upper cutter due to its high position. To facilitate tool replacement, a special impact-resistant shield cutterhead specifically designed for karst formations has been developed. Summary of the Invention

[0003] The purpose of the present invention is to provide a special impact-resistant shield cutterhead for karst formations in order to facilitate the replacement of cutters.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: a special impact-resistant shield cutterhead for karst formations, comprising a disc body, on which a cutter is mounted, the position of the cutter being adjusted by an adjustment mechanism, and the cutter being mounted by an installation mechanism;

[0005] The cam is fixedly provided with a top end and a bottom end of the cam, and the cam is fixedly provided with a guide rail, and the guide rail is fixedly provided with a guide rail for slidingly connecting the cam and the cam.

[0006] As a further solution of the present invention: the mounting mechanism includes a mounting block, which is fixedly connected to the top and bottom ends of the tool, the inner cavity of the mounting frame is provided with a mounting groove for the mounting block to enter, the outer wall of the mounting frame is provided with a connecting groove for the connecting rod to be rotatably connected, the connecting rod is provided with a groove toward one end of the mounting frame, the interior of the mounting frame is slidingly connected with an insertion rod extending to the inner cavity of the mounting groove, the interior of the mounting frame is slidingly connected with a positioning plate at one end of the insertion rod, a first spring is connected between the positioning plate and the mounting frame, one end of the positioning plate is fixedly connected with a protrusion, the protrusion extends to the inner cavity of the connecting groove, and the outer wall of the positioning plate is provided with a slot.

[0007] As a further solution of the present invention: the mounting mechanism also includes a first spur gear, which is rotatably connected to the interior of the mounting frame and located on the outer wall of the insertion rod, one end of the first spur gear is fixedly connected to a rotating block, the rotating block is rotatably connected to the outer wall of the mounting frame, the outer wall of the mounting frame is provided with a rotating groove for the rotating block to rotate, one end of the rotating block is provided with a square hole, the interior of the rotating block is slidably connected to a clamping block extending from the rotating block, a second spring is connected between the clamping block and the rotating block, the interior of the rotating block is located at the outer wall of the clamping block and is rotatably connected to the second spur gear, the interior of the rotating block is located at the outer wall of the second spur gear and is slidably connected to an extrusion block, and the extrusion block extends to the inner cavity of the square hole.

[0008] As a further solution of the present invention: the outer wall of the installation frame fits with the inner wall of the movable groove, the top of the installation frame is provided with a connecting hole and a limiting hole, and the inner wall of the limiting hole fits with the outer wall of the limiting rod.

[0009] As a further solution of the present invention: the outer wall of the threaded rod is symmetrically provided with external threads, and the inner walls of the connecting holes on the upper and lower mounting frames are provided with balls matching the external threads.

[0010] As a further solution of the present invention: the height of the partition is equal to the distance between the two installation frames.

[0011] As a further solution of the present invention: the inner wall of the groove is in contact with the outer wall of one end of the protrusion, and the end of the protrusion located inside the connecting groove is provided with a semicircular surface.

[0012] As a further solution of the present invention: the inner wall of the slot is in contact with the outer wall of the insertion rod, the outer wall of the insertion rod is provided with a first tooth groove, and the first tooth groove is engaged with the first spur gear.

[0013] As a further solution of the present invention, the inner wall of the installation groove is in contact with the outer wall of the installation block.

[0014] As a further solution of the present invention: the inner wall of the rotating groove is provided with a ratchet, one end of the clamping block is engaged with the ratchet, and the end of the extrusion block located in the inner cavity of the square hole is provided with an inclined surface, and the outer walls of the extrusion block and the clamping block are provided with a second tooth groove, and the second tooth groove is engaged with the second spur gear.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. By setting an adjustment mechanism, the rotating plate is separated from the baffle, the fixation of the baffle is cancelled, and the baffle is rotated to open the movable slot. The rotation of the baffle drives the partition to move out from between the two mounting frames. Then, a tool is used to rotate the rotating disk. The rotation of the rotating disk drives the threaded rod to rotate. The rotation of the threaded rod drives the upper and lower mounting frames to move toward the middle mounting frame. When the tool is replaced, the position of the tool can be moved so that the tool is close to the operating platform, which is convenient for the tool replacement operation.

[0017] 2. By setting up the installation mechanism, when the installation frames are close to each other, the positioning plate is displaced so that the slot is aligned with the insertion rod, and a square tool is inserted into the square hole to operate the rotating block to rotate. At this time, the clamping block is separated from the rotating slot, so that the rotating block can rotate in the rotating slot. The rotation of the rotating block drives the insertion rod to move, and the insertion rod moves out of the installation slot, eliminating the obstruction of the installation block. At this time, the installation block can be moved out of the installation slot and the tool can be replaced, which facilitates the rapid installation and removal of the tool. At the same time, the tool is automatically reinforced when the installation frames are away from each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 This is a schematic structural diagram of the back side of the tray of the present invention;

[0020] Figure 3 This is a schematic diagram of the installation of the baffle of the present invention;

[0021] Figure 4 This is a schematic diagram of the installation of the installation frame of the present invention;

[0022] Figure 5 It is a structural schematic diagram of the installation frame of the present invention;

[0023] Figure 6 Schematic diagram of the installation of the connecting rod of the present invention;

[0024] Figure 7 For the present invention Figure 6Enlarged view of point A in the middle;

[0025] Figure 8 Schematic diagram of the installation of the tool of the present invention;

[0026] Figure 9 This is a schematic diagram of the installation of the plunger of the present invention;

[0027] Figure 10 It is a structural schematic diagram of the first straight gear and the rotating block of the present invention;

[0028] Figure 11 It is a structural schematic diagram of the rotating tank of the present invention;

[0029] Figure 12 It is a schematic diagram of the internal structure of the rotating block of the present invention.

[0030] In the figure: 1. disk body; 2. tool; 3. adjustment mechanism; 301. movable groove; 302. mounting frame; 303. baffle; 304. partition; 305. rotating plate; 306. through hole; 307. threaded hole; 308. limit rod; 309. threaded rod; 310. rotating disk; 311. connecting rod; 4. mounting mechanism; 401. mounting block; 402. mounting groove; 403. connecting groove; 404. groove; 405. positioning plate; 406. first spring; 407. protrusion; 408. slot; 409. insertion rod; 410. first spur gear; 411. rotating block; 412. rotating groove; 413. square hole; 414. clamping block; 415. second spring; 416. second spur gear; 417. extrusion block. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and should not be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected, detachably connected, or connected in one piece; they can be mechanically connected or electrically connected; they can be directly connected, or indirectly connected through an intermediate medium, or they can be internal connections between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following describes an embodiment of the present invention based on its overall structure.

[0033] See also Figures 1 to 12 In the embodiment of the present invention, the impact-resistant shield cutterhead specially used for karst formations includes a disc body 1, a cutter 2 is installed on the disc body 1, the position of the cutter 2 is adjusted by an adjustment mechanism 3, and the cutter 2 is installed by an installation mechanism 4. The adjustment mechanism 3 includes a movable groove 301, the movable groove 301 is opened on the outer wall of the disc body 1, and three installation frames 302 are provided on the inner wall of the movable groove 301. The middle installation frame 302 is fixedly connected to the inner wall of the movable groove 301, and the installation frames 302 located above and below are slidably connected to the inner wall of the movable groove 301. The outer wall of the disc body 1 is rotatably connected to a baffle 303 for shielding the installation frame 302, and one end of the baffle 303 is fixedly connected to a partition 304. The outer wall is located on one side of the baffle 303 and is rotatably connected to a rotating plate 305. A through hole 306 is provided on the outer wall of the rotating plate 305. A threaded hole 307 is provided on the outer wall of the disk body 1 between the baffle 303 and the rotating plate 305. The rotating plate 305 is fixedly connected to the disk body 1 through bolts and threaded holes 307. The inner wall of the movable groove 301 is symmetrically provided with a limiting rod 308 and a threaded rod 309 that pass through the mounting frame 302. The limiting rod 308 is fixedly connected to the movable groove 301, and the threaded rod 309 is rotatably connected to the movable groove 301. The outer wall of the threaded rod 309 is fixedly connected to a rotating disk 310. Two connecting rods 311 are rotatably connected between the two mounting frames 302, and the two connecting rods 311 are rotatably connected to each other.

[0034] In this embodiment, when the tool 2 is replaced, the bolt is removed from the threaded hole 307, so that the bolt moves out of the through hole 306, and the fixing of the rotating plate 305 is cancelled. The rotating plate 305 is rotated to separate from the baffle 303, and the fixing of the baffle 303 is cancelled. The baffle 303 is rotated to open the movable groove 301. The baffle 303 rotates to drive the partition 304 to move out from between the two mounting frames 302. Then, a tool is used to rotate the rotating disk 310. The rotating disk 310 rotates to drive the threaded rod 309 to rotate. The threaded rod 309 rotates to drive the upper and lower mounting frames 302 moves toward the middle mounting frame 302. After replacing the tool 2, the rotating disk 310 is rotated to drive the mounting frame 302 to reset. Then, the baffle 303 is rotated. The baffle 303 and the partition 304 cover the movable slot 301. At the same time, the partition 304 is located between the two mounting frames 302 to reinforce the position of the mounting frames 302. The rotating plate 305 is rotated to contact the baffle 303 to fix the baffle 303. At the same time, the bolt is connected through the through hole 306 and into the threaded hole 307 to fix the rotating plate 305. This design makes it easy to move the position of the tool 2 when replacing it, so that the tool 2 is close to the operating platform, making it easier to replace the tool 2.

[0035] Please refer to Figures 6 to 12, the mounting mechanism 4 includes a mounting block 401, the mounting block 401 is fixedly connected to the top and bottom ends of the tool 2, the inner cavity of the mounting frame 302 is provided with a mounting groove 402 for the mounting block 401 to enter, the outer wall of the mounting frame 302 is provided with a connecting groove 403 for the connecting rod 311 to be rotatably connected, the connecting rod 311 is provided with a groove 404 at one end facing the mounting frame 302, the interior of the mounting frame 302 is slidably connected with an insertion rod 409 extending to the inner cavity of the mounting groove 402, the interior of the mounting frame 302 is located at one end of the insertion rod 409 and is slidably connected with a positioning plate 405, a first spring 406 is connected between the positioning plate 405 and the mounting frame 302, one end of the positioning plate 405 is fixedly connected with a protrusion 407, the protrusion 407 extends to the inner cavity of the connecting groove 403, the outer wall of the positioning plate 405 is provided with a slot 408, the mounting mechanism 4 also includes The first spur gear 410 is rotatably connected to the interior of the mounting frame 302 and is located on the outer wall of the insertion rod 409. One end of the first spur gear 410 is fixedly connected to a rotating block 411. The rotating block 411 is rotatably connected to the outer wall of the mounting frame 302. The outer wall of the mounting frame 302 is provided with a rotating groove 412 for the rotating block 411 to rotate. A square hole 413 is provided at one end of the rotating block 411. The interior of the rotating block 411 is slidably connected to a clamping block 414 extending from the rotating block 411. A second spring 415 is connected between the clamping block 414 and the rotating block 411. The interior of the rotating block 411 is located at the outer wall of the clamping block 414 and is rotatably connected to the second spur gear 416. The interior of the rotating block 411 is located at the outer wall of the second spur gear 416 and is slidably connected to an extrusion block 417. The extrusion block 417 extends to the inner cavity of the square hole 413.

[0036] In this embodiment, when the mounting frames 302 are close to each other, the connecting rod 311 rotates in the connecting groove 403, and the connecting rod 311 rotates to push the protrusion 407 out of the groove 404. The displacement of the protrusion 407 drives the positioning plate 405 to move, causing the first spring 406 to be squeezed. The positioning plate 405 is displaced so that the slot 408 is aligned with the insertion rod 409, so that the insertion rod 409 has space for horizontal movement. After completion, a square tool is inserted into the square hole 413 to operate the rotating block 411 to rotate. At this time, the square tool contacts the extrusion block 417, pushing the extrusion block 417 to move. The extrusion block 417 is positioned The movement drives the second spur gear 416 to rotate, and the rotation of the second spur gear 416 drives the clamping block 414 to move, causing the second spring 415 to be squeezed, and the clamping block 414 is separated from the rotating groove 412, so that the rotating block 411 can rotate in the rotating groove 412, and the rotation of the rotating block 411 drives the first spur gear 410 to rotate, and the rotation of the first spur gear 410 drives the insertion rod 409 to move, and the insertion rod 409 moves through the slot 408 and moves out of the installation slot 402 at the same time, eliminating the obstruction of the installation block 401. At this time, the installation block 401 can be moved out of the installation slot 402, and the tool 2 can be replaced.

[0037] After the tool 2 is replaced, the mounting block 401 moves into the mounting slot 402, and the rotating block 411 drives the first spur gear 410 to rotate. The first spur gear 410 rotates and drives the insertion rod 409 to move. The insertion rod 409 moves into the mounting slot 402, fixes the mounting block 401, and then completes the installation of the tool 2. At the same time, the insertion rod 409 moves out of the slot 408. When the mounting frames 302 move away from each other, the connecting rod 311 rotates to a vertical state. At this time, the protrusion 407 contacts the groove 404, and the positioning plate 405 is reset by the elastic force of the first spring 406, causing the slot 408 and the insertion rod 409 to be misaligned, leaving no space for the insertion rod 409 to move, thereby reinforcing the tool 2. This design facilitates the rapid installation and removal of the tool 2, and automatically reinforces the tool 2 when the mounting frames 302 move away from each other.

[0038] Please refer to Figures 2 to 5 The outer wall of the mounting frame 302 fits with the inner wall of the movable groove 301. A connecting hole and a limiting hole are provided at the top of the mounting frame 302. The inner wall of the limiting hole fits with the outer wall of the limiting rod 308. The outer wall of the threaded rod 309 is symmetrically provided with external threads. The inner walls of the connecting holes on the upper and lower mounting frames 302 are provided with balls matching the external threads.

[0039] In this embodiment: the rotating disk 310 rotates to drive the threaded rod 309 to rotate, and the threaded rod 309 rotates to drive the upper and lower mounting frames 302 to move toward the middle mounting frame 302. At this time, the mounting frame 302 slides in the movable groove 301, and the limiting rod 308 slides in the limiting hole.

[0040] Please refer to Figures 2 to 5 , the height of the partition 304 is equal to the distance between the two installation frames 302.

[0041] In this embodiment, the baffle 303 is rotated, and the baffle 303 and the partition 304 shield the movable groove 301 . Meanwhile, the partition 304 is located between the two installation frames 302 to reinforce the position of the installation frames 302 .

[0042] Please refer to Figures 6 to 12 The inner wall of the groove 404 fits with the outer wall of one end of the protrusion 407, and a semicircular surface is provided on one end of the protrusion 407 located inside the connecting groove 403.

[0043] In this embodiment, when the mounting frames 302 are brought closer to each other, the connecting rod 311 rotates in the connecting groove 403 , and the connecting rod 311 rotates to push the protrusion 407 out of the groove 404 . The displacement of the protrusion 407 drives the positioning plate 405 to move as well.

[0044] Please refer to Figures 6 to 12 The inner wall of the slot 408 fits in with the outer wall of the insertion rod 409 , and the outer wall of the insertion rod 409 is provided with a first tooth groove, which meshes with the first spur gear 410 .

[0045] In this embodiment: the positioning plate 405 is displaced so that the slot 408 is aligned with the insertion rod 409, allowing the insertion rod 409 to have space for horizontal movement. After completion, a square tool is inserted into the square hole 413 to operate the rotating block 411 to rotate. The rotation of the rotating block 411 drives the first straight gear 410 to rotate. The rotation of the first straight gear 410 drives the insertion rod 409 to move. The insertion rod 409 moves through the slot 408 and moves out of the installation groove 402 at the same time.

[0046] Please refer to Figures 6 to 12 , the inner wall of the mounting groove 402 fits with the outer wall of the mounting block 401 .

[0047] In this embodiment, the mounting block 401 is moved out of the mounting slot 402 to perform a replacement operation on the tool 2 .

[0048] Please refer to Figures 6 to 12 The inner wall of the rotating groove 412 is provided with a ratchet, one end of the clamping block 414 is engaged with the ratchet, and the extrusion block 417 is provided with an inclined surface at one end of the inner cavity of the square hole 413. The outer walls of the extrusion block 417 and the clamping block 414 are provided with a second tooth groove, which is engaged with the second spur gear 416.

[0049] In this embodiment: a square tool is inserted into the square hole 413 to operate the rotating block 411 to rotate. At this time, the square tool contacts the extrusion block 417, pushing the extrusion block 417 to move. The displacement of the extrusion block 417 drives the second spur gear 416 to rotate. The rotation of the second spur gear 416 drives the clamping block 414 to move, causing the second spring 415 to be squeezed. The clamping block 414 is separated from the rotating groove 412, so that the rotating block 411 can rotate in the rotating groove 412.

[0050] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A special impact-resistant shield cutterhead for karst formations, comprising a cutterhead (1), a cutter (2) being mounted on the cutterhead (1), and characterized in that: The position of the tool (2) is adjusted via an adjustment mechanism (3), and the tool (2) is installed via an installation mechanism (4); The adjusting mechanism (3) includes a movable groove (301), the movable groove (301) is opened on the outer wall of the disk body (1), and the inner wall of the movable groove (301) is provided with three mounting frames (302), the middle mounting frame (302) is fixedly connected to the inner wall of the movable groove (301), and the mounting frames (302) located above and below are slidably connected to the inner wall of the movable groove (301), the outer wall of the disk body (1) is rotatably connected to a baffle (303) for shielding the mounting frame (302), one end of the baffle (303) is fixedly connected to a partition (304), the outer wall of the disk body (1) is located on one side of the baffle (303) and is rotatably connected to a rotating plate (305), and the outer wall of the rotating plate (305) is provided with a through hole ( 306), a threaded hole (307) is provided on the outer wall of the disk body (1) between the baffle (303) and the rotating plate (305), the rotating plate (305) is fixedly connected to the disk body (1) through the bolt and the threaded hole (307), the inner wall of the movable groove (301) is symmetrically provided with a limiting rod (308) and a threaded rod (309) that pass through the mounting frame (302), the limiting rod (308) is fixedly connected to the movable groove (301), the threaded rod (309) is rotatably connected to the movable groove (301), the outer wall of the threaded rod (309) is fixedly connected to a rotating disk (310), two connecting rods (311) are rotatably connected between the two mounting frames (302), and the two connecting rods (311) are rotatably connected to each other; The mounting mechanism (4) includes a mounting block (401), the mounting block (401) is fixedly connected to the top and bottom ends of the tool (2), the inner cavity of the mounting frame (302) is provided with a mounting groove (402) for the mounting block (401) to enter, the outer wall of the mounting frame (302) is provided with a connecting groove (403) for the connecting rod (311) to be rotatably connected, the end of the connecting rod (311) facing the mounting frame (302) is provided with a groove (404), and the inner sliding wall of the mounting frame (302) is provided with a groove (404). A rod (409) is movably connected to the inner cavity of the installation groove (402); a positioning plate (405) is slidably connected to one end of the rod (409) located inside the installation frame (302); a first spring (406) is connected between the positioning plate (405) and the installation frame (302); a protrusion (407) is fixedly connected to one end of the positioning plate (405); the protrusion (407) extends to the inner cavity of the connection groove (403); and a slot (408) is provided on the outer wall of the positioning plate (405); The mounting mechanism (4) further comprises a first spur gear (410), the first spur gear (410) being rotatably connected to the interior of the mounting frame (302) and being located on the outer wall of the insertion rod (409), one end of the first spur gear (410) being fixedly connected to a rotating block (411), the rotating block (411) being rotatably connected to the outer wall of the mounting frame (302), the outer wall of the mounting frame (302) being provided with a rotating groove (412) for the rotating block (411) to rotate, and one end of the rotating block (411) being provided with a square hole (412). 3), the interior of the rotating block (411) is slidably connected to a clamping block (414) extending from the rotating block (411), a second spring (415) is connected between the clamping block (414) and the rotating block (411), the interior of the rotating block (411) is rotatably connected to a second spur gear (416) located on the outer wall of the clamping block (414), the interior of the rotating block (411) is slidably connected to an extrusion block (417) located on the outer wall of the second spur gear (416), and the extrusion block (417) extends to the inner cavity of the square hole (413).

2. The impact-resistant shield cutterhead specially designed for karst formations according to claim 1 is characterized in that: The outer wall of the installation frame (302) fits in contact with the inner wall of the movable groove (301), and a connecting hole and a limiting hole are provided at the top of the installation frame (302), and the inner wall of the limiting hole fits in contact with the outer wall of the limiting rod (308).

3. The impact-resistant shield cutterhead specially designed for karst formations according to claim 2 is characterized in that: The outer wall of the threaded rod (309) is symmetrically provided with external threads, and the inner walls of the connection holes on the upper and lower mounting frames (302) are provided with balls matching the external threads.

4. The impact-resistant shield cutterhead specially designed for karst formations according to claim 1 is characterized in that: The height of the partition (304) is equal to the distance between the two installation frames (302).

5. The impact-resistant shield cutterhead specially designed for karst formations according to claim 1 is characterized in that: The inner wall of the groove (404) fits into the outer wall of one end of the protrusion (407), and a semicircular surface is provided at one end of the protrusion (407) located inside the connecting groove (403).

6. The impact-resistant shield cutterhead specially designed for karst formations according to claim 1 is characterized in that: The inner wall of the slot (408) fits in contact with the outer wall of the insertion rod (409), and the outer wall of the insertion rod (409) is provided with a first tooth groove, which meshes with the first spur gear (410).

7. The impact-resistant shield cutterhead specially designed for karst formations according to claim 1 is characterized in that: The inner wall of the mounting groove (402) fits in contact with the outer wall of the mounting block (401).

8. The impact-resistant shield cutterhead specially designed for karst formations according to claim 1 is characterized in that: The inner wall of the rotating groove (412) is provided with ratchet teeth, one end of the clamping block (414) is engaged with the ratchet teeth, one end of the extrusion block (417) located in the inner cavity of the square hole (413) is provided with an inclined surface, and the outer walls of the extrusion block (417) and the clamping block (414) are provided with second tooth grooves, and the second tooth grooves are engaged with the second spur gear (416).

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