Shield tunneling machine cutterhead transmission type cutter head structure

Abstract

The invention relates to the technical field of shield tunneling machines, and discloses a shield tunneling machine cutterhead transmission type tool bit structure which comprises a cutterhead main body and a shield body, a driving device is fixedly arranged in the shield body and connected with the center of the cutterhead main body, a mounting cavity is formed in the surface of a mounting base, and a cutter head is arranged in the mounting cavity. A top seat is rotationally connected to the upper side wall of the mounting seat through a torsional spring rotating shaft, clamping grooves are formed in the sides, opposite to the mounting cavity, of the top seat correspondingly, a cutter body is jointly inserted into the two clamping grooves, and the driving end of a first hydraulic rod is rotationally connected with the inner side wall of the mounting seat through a shaft. The cutter main body can be quickly fixed through the cutter locking assembly, and meanwhile, the cutter main body can be moved out of the cutter holder, so that an operator can conveniently take down a damaged cutter and place a new cutter, the replacement process of the cutter main body is optimized, the shutdown time for replacing the cutter main body of the shield tunneling machine is shortened, and the construction efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of shield machines, in particular to a cutter head structure of a shield machine cutter disc drive. Background Art

[0002] With the acceleration of urbanization and the increasing demand for infrastructure construction, shield machines, as an important tool for modern tunnel excavation, have been widely used at home and abroad.

[0003] However, the existing shield machine tool system is prone to wear during long-term operation, resulting in reduced work efficiency and high maintenance costs. In addition, the replacement of the traditional tool system is complicated and time-consuming, affecting the progress of the entire project.

[0004] After searching, the publication number: CN113153331A discloses a tool changing device for a shield machine that is convenient for replacing tools, including an excavation disc, a support frame is arranged inside the excavation disc, a tool holding structure is arranged on one side of the excavation disc, and the tool holding structure includes a front fixed block inside. In the present invention, through the arrangement of the limiting structure and the hydraulic cylinder, the hydraulic cylinder is opened to drive the limiting structure to move, so that the limiting structure is unfolded toward both sides, and then through the pulling force of the pulling spring sheet, the end of the limiting structure close to the pulling spring sheet is moved toward the hydraulic cylinder, so that the end of the limiting structure away from the hydraulic cylinder is still in contact, so that the excavation tool can continue to be clamped, and through the movement of the limiting structure, the limiting structure clamps the excavation tool and moves it toward the direction of the hydraulic cylinder, so that the excavation tool is clamped and removed, and then the operator uses a hydraulic press to connect the excavation tool, and then the excavation tool can be replaced.

[0005] In the above application, since the cutting tool has an annular cutting edge, after the cutting edge on one side of the cutting tool is worn out, the cutting edges on other sides cannot be effectively utilized, and direct replacement is rather wasteful. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a shield machine cutter head structure with a cutter disc drive, which solves the problem that the cutter installation is difficult and inefficient.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a shield machine cutter head structure, including a cutter head body and a shield body, a driving device is fixedly arranged inside the shield body, and the driving device is connected to the center of the cutter head body, the driving device includes a motor, a reducer and a transmission gear, a plurality of tool seats are fixedly arranged on the surface of the cutter head body, a plurality of mounting grooves are opened on the surface of the tool seat, a tool locking assembly is installed inside the mounting groove, the tool locking assembly includes a mounting seat and two groups of hydraulic rods, the outer wall of the mounting seat is slidably connected to the inner wall of the mounting groove, the surface of the mounting seat is opened with a mounting cavity, the upper side wall of the mounting seat is rotatably connected with a top seat through a torsion spring rotating shaft, and the top seat and the opposite side of the mounting cavity are respectively opened with card slots, and the tool body is commonly plugged into the inside of the two card slots, one end of the hydraulic rod one is rotatably installed on the inner wall of the mounting groove through an axis, and the driving end of the hydraulic rod one is rotatably connected to the inner side wall of the mounting seat through an axis.

[0008] Preferably, the inner top wall and the inner bottom wall of the installation groove protrude outwards to form limiting protrusions.

[0009] Preferably, the card slot is set to be annular, and a cavity is opened on the lower surface of the tool body. The tool body includes a blade body, and the upper and lower ends of the blade body are respectively fixed with connecting protrusions. The tool locking assembly also includes a base, and the base is located inside the tool body. The lower surface of the base is fixedly connected to the bottom wall of the mounting cavity.

[0010] Preferably, two groups of hydraulic rods 2 are fixedly connected to the upper surface of the base, the driving ends of the two groups of hydraulic rods 2 are commonly fixedly connected to a mounting platform, the upper surface of the mounting platform is fixedly connected to a driver 1, and the driving end of the driver 1 is fixedly connected to a wedge-shaped locking block.

[0011] Preferably, the tool locking assembly further comprises a wedge-shaped locking groove, and the locking groove is formed on the inner top wall of the cavity.

[0012] Preferably, a guide assembly is installed above the base, and the guide assembly includes a second driver, the bottom end of the second driver is fixedly connected to the upper surface of the base, the driving end of the second driver is fixedly connected to a support column, the top end of the support column is rotatably connected to a connecting plate, the driving end of the second hydraulic rod passes through the connecting plate, and the connecting plate is located below the mounting platform.

[0013] Preferably, an electromagnetic ultrasonic transducer is embedded in the side wall of the support column, and the electromagnetic ultrasonic transducer is electrically connected to an electromagnetic ultrasonic thickness gauge.

[0014] Preferably, the inner wall of the blade body is provided with a plurality of locking slots which are equidistantly distributed in a ring shape.

[0015] Preferably, the upper surface of the connecting plate is fixedly connected to a fixing seat, the side wall of the fixing seat is rotatably connected to a gear ring, the tooth end of the gear ring is meshingly connected to a rack, the top end of the rack is fixedly connected to the lower surface of the mounting platform, and the bottom end of the rack passes through and is slidably connected to the connecting plate.

[0016] Preferably, the inner wall of the gear ring is tapped to form a thread groove, the internal thread of the thread groove is connected to a lead screw, one end of the lead screw passes through a fixed seat, the other end of the lead screw is fixedly connected to a sliding seat, and the bottom end of the sliding seat is slidably connected to the upper surface of the connecting plate.

[0017] Working principle: to replace the tool body, start hydraulic rod one, and push the mounting seat to slide outward by extending the hydraulic rod one. After the top seat moves out of the mounting groove, the resistance encountered disappears, and the top seat rotates upward through the torque of the torsion spring shaft to automatically open the mounting cavity, thereby facilitating and quickly removing the tool body. When installing the tool body, insert the connecting protrusion at the bottom of the blade body into the slot at the bottom of the mounting cavity, and then control the hydraulic rod one to contract, driving the mounting seat to slide inward until it contacts the limiting protrusion. The mounting seat is limited by the limiting protrusion and hydraulic rod one to ensure the stability of the tool body during implementation. When the top seat moves into the mounting groove, it automatically rotates to a horizontal position by contacting the mounting groove, so that the connecting protrusion at the top of the blade body is inserted into the slot on the lower surface of the top seat, thereby limiting the tool body and achieving quick installation. The device simplifies the replacement process of the tool body through the tool locking assembly, shortens the downtime of the shield machine for replacing the tool body, and improves construction efficiency.

[0018] After the tool body is installed, start hydraulic rod 2, and the mounting platform is driven to rise by extending hydraulic rod 2. The mounting platform drives the locking block to move upward and insert into the locking groove, thereby fixing the angle of the tool body, so that the blade body is located on the outer edge for excavation. After the outer edge is worn, first control hydraulic rod 2 to contract to move the lead screw out of the locking slot, and then run driver 1 to drive the locking block to rotate. The rotation of the locking block drives the tool body to rotate, so that the worn edge of the blade body is rotated into the installation cavity, and the unused edge is rotated to the outside, thereby maximizing the use of the cutting edge of the tool body and reducing waste. At the same time, it can be replaced during construction without manual shutdown for replacement, further improving construction efficiency.

[0019] When the mounting platform rises, the rack is driven to move upward, and the upward movement of the rack drives the gear ring to rotate. The rotation of the gear ring drives the lead screw to move outward until it is inserted into the inside of the locking slot, thereby reinforcing the angle of the tool body and dispersing the torque exerted on the driver 1 by the soil when the tool body is digging, thereby extending the service life of the driver 1.

[0020] The electromagnetic ultrasonic transducer inside the tool body can detect the cutting edge on the outside of the tool body, so that the wear of the cutting edge of the tool body can be monitored in real time, which is convenient for timely replacement of the tool body or adjustment of the cutting edge. The support column is driven to rotate by driver 2, and the rotation of the support column drives the electromagnetic ultrasonic transducer to rotate, so that the detection area of ​​the electromagnetic ultrasonic transducer can be adjusted, and the detection surface of the cutting edge on the outside of the tool body can be expanded to improve the detection effect. When the tool body is worn, the position of the cutter disc body can be adjusted by the propulsion jack in the shield body. By adjusting the extension and contraction amount of the jack at different positions, the cutter disc body can be appropriately tilted or rotated during the propulsion process, thereby restoring the stable cutting angle of the tool body, and allowing the remaining tool cutting edge part to be restored to a cutting angle close to the original, thereby ensuring that the tool body maintains a stable cutting angle during movement.

[0021] The present invention provides a shield machine cutter head structure with a cutter disc drive. It has the following beneficial effects: 1. The present invention can quickly fix the tool body through the tool locking assembly, and at the same time, the tool body can be moved out of the tool holder, which is convenient for operators to remove the damaged tool body and place a new tool body, thereby optimizing the tool body replacement process, shortening the downtime of the shield machine for replacing the tool body, and improving construction efficiency.

[0022] 2. The present invention can rotate the annular cutting edge of the tool body to the outside of the tool seat in sequence, so as to maximize the use of the cutting edge of the tool body and avoid the waste caused by directly replacing the cutting edge of the traditional tool body after it is damaged. At the same time, it can be replaced during construction without manual replacement, further improving construction efficiency, reducing replacement frequency, and reducing maintenance costs.

[0023] 3. The present invention inserts the locking block into the locking groove, fixes the angle of the tool body by the self-locking function of the driver 1, and at the same time inserts the lead screw into the locking groove, thereby reinforcing the angle of the tool body and dispersing the torque exerted on the driver 1 by the soil when the tool body is excavating, thereby extending the service life of the driver 1.

[0024] 4. The present invention can detect the cutting edge on the outside of the tool body through the electromagnetic ultrasonic transducer inside the tool body, so as to monitor the wear of the cutting edge of the tool body in real time, and display the data on a PC for the operator to view, so that the operator can replace the tool body or adjust the cutting edge in time. When the tool body is worn, the position of the cutter body can be adjusted so that the remaining cutting edge can be restored to a cutting angle close to the original, thereby ensuring that the blade maintains a stable cutting angle during movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A perspective view of the present invention; Figure 2 It is a cross-sectional schematic diagram of the knife holder of the present invention; Figure 3 It is a schematic diagram of the structure of the tool locking assembly of the present invention; Figure 4 It is a schematic cross-sectional view of a tool body of the present invention; Figure 5 It is a schematic diagram of the unfolded structure of the top seat of the present invention; Figure 6 For the present invention Figure 5 A magnified image of point A; Figure 7 It is a schematic diagram of the base structure of the present invention; Figure 8 For the present invention Figure 7 Enlarged view of point B.

[0026] Among them, 1. the cutter body; 2. the shield body; 3. the cutter seat; 4. the mounting groove; 5. the cutter locking assembly; 501. the mounting seat; 502. the mounting cavity; 503. the hydraulic rod one; 504. the slot; 505. the hydraulic rod two; 506. the mounting table; 507. the driver one; 508. the locking block; 509. the locking groove; 510. the top seat; 511. the base; 6. the cutter body; 61. the blade body; 62. the connecting protrusion; 63. the locking slot; 7. the limiting protrusion; 8. the guide assembly; 81. the driver two; 82. the support column; 83. the electromagnetic ultrasonic transducer; 9. the connecting plate; 10. the fixing seat; 11. the gear ring; 12. the rack; 13. the lead screw; 14. the sliding seat. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. 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 creative work are within the scope of protection of the present invention.

[0028] Please refer to the attached Figure 1 -Attached Figure 3The embodiment of the present invention provides a shield machine cutter head structure, including a cutter body 1 and a shield body 2. A driving device is fixedly arranged inside the shield body 2. The driving device is connected to the center of the cutter body 1. The driving device includes a motor and a reducer. The output shaft of the reducer is fixedly connected to the cutter body 1. A plurality of tool seats 3 are fixedly arranged on the surface of the cutter body 1. A plurality of mounting grooves 4 are opened on the surface of the tool seat 3. A tool locking assembly 5 is installed inside the mounting groove 4. The tool locking assembly 5 includes a mounting seat 501 and two groups of hydraulic rods 503. The hydraulic rods 503 are electrically connected to the PC in the main control room of the shield machine. The outer wall of the mounting seat 501 is slidably connected to the inner wall of the mounting groove 4, and a mounting cavity 502 is provided on the surface of the mounting seat 501. The upper side wall of the mounting seat 501 is rotatably connected to a top seat 510 through a torsion spring shaft. A clamping groove 504 is respectively provided on the opposite side of the top seat 510 and the mounting cavity 502. The insides of the two clamping grooves 504 are jointly plugged with a tool body 6. One end of the hydraulic rod 503 is rotatably mounted on the inner wall of the mounting groove 4 through an axis, and the driving end of the hydraulic rod 503 is rotatably connected to the inner side wall of the mounting seat 501 through an axis, and the inner top wall and the inner bottom wall of the mounting groove 4 are respectively protruded outward to form a limited position protrusion 7.

[0029] Specifically, the cutter head body 1 is rotatably connected to the shield body 2 through a large bearing. The bearing can bear the weight of the cutter head body 1 and the axial force and radial force generated when cutting the soil. During the power transmission process, the bearing ensures that the cutter head can rotate smoothly around its axis. The motor drives the reducer to rotate, and the high-speed and low-torque input power is converted into low-speed and high-torque power suitable for the rotation of the cutter head body 1 through the transmission gear inside the reducer, driving the cutter head body 1 to rotate. The tool seat 3 is used to connect the cutter head body 1, and the mounting groove 4 is used to install the tool locking assembly 5 and the tool body 6. The hydraulic rod 503 is used to push the mounting seat 501 to slide inside the mounting groove 4. When the tool body 6 needs to be replaced, the hydraulic rod 503 extends to push the mounting seat 501 to slide outward, and the top seat 510 is moved out of the mounting groove 4 through the torque of the torsion spring shaft. It rotates upward, thereby automatically opening the installation cavity 502, making it easy for the operator to take out the damaged tool body 6 and realize quick disassembly of the tool body 6. When installing the tool body 6, the bottom end of the tool body 6 is inserted into the interior of the card slot 504, and the hydraulic rod 1 503 is controlled to shrink until the mounting seat 501 abuts against the limiting protrusion 7. When the top seat 510 moves to the interior of the mounting groove 4, it abuts against the inner wall of the mounting groove 4 and automatically rotates to a horizontal position and covers the top of the tool body 6, quickly limiting the tool body 6 to prevent it from falling off, and supporting the mounting seat 501 through the limiting protrusion 7, and the hydraulic rod 1 503 limits the mounting seat 501 to avoid the position of the tool body 6 inside the mounting seat 501 from being offset. The tool locking assembly 5 can realize quick and convenient disassembly and assembly of the tool body 6, and shorten the replacement time of the tool body 6.

[0030] Please refer to the attached Figure 3 , Attachment Figure 4 -Attached Figure 7 The card slot 504 is set to be annular, and a cavity is opened on the lower surface of the tool body 6. The tool body 6 includes a blade body 61. The upper and lower ends of the blade body 61 are respectively fixed with connecting protrusions 62, and the connecting protrusions 62 are set to be annular. The tool locking assembly 5 also includes a base 511, and the base 511 is located inside the tool body 6. The lower surface of the base 511 is fixedly connected to the bottom wall of the mounting cavity 502, and the upper surface of the base 511 is fixedly connected to two groups of hydraulic rods 2 505, and the hydraulic rods 2 505 are electrically connected to the PC in the main control room of the shield machine. The driving ends of the two groups of hydraulic rods 2 505 are commonly fixedly connected to a mounting table 506, and the upper surface of the mounting table 506 is fixedly connected to a driver 1 507, and the driver 1 507 is electrically connected to the PC in the main control room of the shield machine. The driving end of the driver 1 507 is fixedly connected to a wedge-shaped locking block 508, and the tool locking assembly 5 also includes a wedge-shaped locking groove 509, and the locking groove 509 is opened on the inner top wall of the cavity.

[0031] Specifically, an annular cutting edge is arranged on the outer side of the blade body 61. When installing the tool body 6, the connecting protrusion 62 is inserted into the interior of the card slot 504 to realize the rotational cooperation between the tool body 6 and the mounting seat 501 and the top seat 510. The cavity is used to accommodate the base 511, the hydraulic rod 2 505, the mounting platform 506, the driver 1 507 and the locking block 508. After the tool body 6 is installed, the hydraulic rod 2 505 is controlled to extend so that the locking block 508 is inserted into the interior of the locking groove 509, thereby fixing the angle of the tool body 6. After the cutting edge on the outer side of the blade body 61 is worn, the driver 1 507 is operated to drive the tool body 6 to rotate, thereby adjusting the position of the cutting edge so that the intact cutting edge rotates to the outside, thereby maximizing the use of the cutting edge on the surface of the tool body 6 to avoid waste. At the same time, the cutting edge can be adjusted remotely and automatically, thereby extending the service life of the tool body 6, greatly reducing the number of manual replacements of the tool body 6, and improving construction efficiency.

[0032] Please refer to the attached Figure 6 A guide assembly 8 is installed above the base 511, and the guide assembly 8 includes a second driver 81. The bottom end of the second driver 81 is fixedly connected to the upper surface of the base 511, and the driving end of the second driver 81 is fixedly connected to a support column 82. The top of the support column 82 is rotatably connected to a connecting plate 9. The driving end of the second hydraulic rod 505 passes through the connecting plate 9, and the connecting plate 9 is located below the mounting platform 506. The side wall of the support column 82 is embedded with an electromagnetic ultrasonic transducer 83, and the electromagnetic ultrasonic transducer 83 is electrically connected to an electromagnetic ultrasonic thickness gauge. The electromagnetic ultrasonic thickness gauge does not require a coupling agent when measuring the thickness of the metal tool body 6. The electromagnetic ultrasonic thickness gauge is fixedly connected to the support column 82, and the electromagnetic ultrasonic thickness gauge, the second driver 81 and the second hydraulic rod 505 are electrically and mechanically connected to the PC in the main control room of the shield machine.

[0033] Specifically, the connecting plate 9 is rotatably connected to the support column 82, and the driving end of the hydraulic rod 505 is used to limit the angle, so as to avoid the direction of the lead screw 13 on the surface of the connecting plate 9 from changing. The electromagnetic ultrasonic transducer 83 faces the outer edge of the blade body 61, and the wear amount of the outer edge is detected by ultrasonic wave. The driver 81 drives the support column 82 to rotate, and the support column 82 drives the electromagnetic ultrasonic transducer 83 to rotate, so that the detection surface of the electromagnetic ultrasonic transducer 83 can be adjusted, the detection area can be expanded, and the detection data can be transmitted to the PC for the operator to watch, so that the operator can operate the machine. Personnel can replace the tool body 6 or adjust the cutting edge in time according to the amount of wear, and when the tool body 6 is worn, the position of the cutter disc body 1 can be adjusted by the propulsion jack in the shield body 2. By adjusting the extension and contraction amount of the jacks at different positions, the cutter disc body 1 can be appropriately tilted or rotated during the propulsion process, thereby restoring the stable cutting angle of the tool body 6, and allowing the remaining tool cutting edge to be restored to a cutting angle close to the original, thereby ensuring that the blade maintains a stable cutting angle during movement. The jack in the shield body 2 and its operation method belong to the prior art and will not be described in detail herein.

[0034] Please refer to the attached Figure 7-Figure 8 The inner wall of the blade body 61 is provided with a plurality of locking slots 63 which are equidistantly distributed in a ring shape. The upper surface of the connecting plate 9 is fixedly connected with a fixing seat 10. The side wall of the fixing seat 10 is rotatably connected with a gear ring 11. The tooth end of the gear ring 11 is meshedly connected with a rack 12. The top of the rack 12 is fixedly connected with the lower surface of the mounting platform 506. The bottom end of the rack 12 penetrates and is slidably connected with the connecting plate 9. A threaded groove is tapped on the inner wall of the gear ring 11. A lead screw 13 is connected with the internal thread of the threaded groove. One end of the lead screw 13 penetrates the fixing seat 10. The other end of the lead screw 13 is fixedly connected with a sliding seat 14. The bottom end of the sliding seat 14 is slidably connected with the upper surface of the connecting plate 9. The depth of the locking slot 63 is less than the depth of the locking slot 509.

[0035] Specifically, the fixing seat 10 is used to rotate and support the gear ring 11, and the fixing seat 10 is used to connect the lead screw 13. The hydraulic rod 505 extends to drive the mounting platform 506 to rise, and the mounting platform 506 rises to drive the rack 12 to rise. The rack 12 rises to drive the gear ring 11 to rotate, and the rotation of the gear ring 11 drives the lead screw 13 to slide outward, so that after the locking block 508 is inserted into the locking groove 509, the lead screw 13 is inserted into the locking slot 63, and the self-locking function of the driver 507 itself is cooperated to fix the angle of the tool body 6, and disperse the driver 507. The torque applied by the soil when the tool body 6 is digging extends the service life of the driver 507. When adjusting the blade angle, the hydraulic rod 505 contracts to move the screw 13 inward and exit the locking slot 63. Since the depth of the locking slot 63 is less than the depth of the locking groove 509, when the screw 13 exits the locking slot 63, the locking block 508 does not exit the locking groove 509, so that when the driver 507 drives the locking block 508 to rotate, it can drive the tool body 6 to rotate, thereby adjusting the blade position and avoiding motion interference.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A shield machine cutter head structure with a cutter disc drive, comprising a cutter disc main body (1) and a shield body (2), wherein a drive device is fixedly arranged inside the shield body (2), the drive device is connected to the center of the cutter disc main body (1), and the drive device comprises a motor and a reducer, and is characterized in that: A plurality of knife seats (3) are fixedly arranged on the surface of the knife disc body (1), a plurality of mounting grooves (4) are provided on the surface of the knife seats (3), a knife locking assembly (5) is installed inside the mounting groove (4), the knife locking assembly (5) comprises a mounting seat (501) and two groups of hydraulic rods (503), the outer wall of the mounting seat (501) is slidably connected to the inner wall of the mounting groove (4), the surface of the mounting seat (501) is provided with a mounting cavity (502), the upper side wall of the mounting seat (501) is rotatably connected to a top seat (510) via a torsion spring rotating shaft, the top seat (510) and the mounting cavity (502) are respectively provided with a clamping groove (504) on the side opposite to the mounting cavity (502), the inside of the two clamping grooves (504) are jointly plugged with a knife body (6), one end of the hydraulic rod (503) is rotatably mounted on the inner wall of the mounting groove (4) via a shaft, and the driving end of the hydraulic rod (503) is rotatably connected to the inner side wall of the mounting seat (501) via a shaft.

2. The shield machine cutter head structure according to claim 1, characterized in that: The inner top wall and the inner bottom wall of the installation groove (4) respectively protrude outwards to form a limiting protrusion (7).

3. The shield machine cutter head structure according to claim 1, characterized in that: The clamping groove (504) is arranged in an annular shape, a cavity is provided on the lower surface of the tool body (6), the tool body (6) comprises a blade body (61), and connecting protrusions (62) are respectively fixed to the upper and lower ends of the blade body (61), and the tool locking assembly (5) further comprises a base (511), the base (511) is located inside the tool body (6), and the lower surface of the base (511) is fixedly connected to the bottom wall of the mounting cavity (502).

4. The shield machine cutter head structure according to claim 3, characterized in that: Two groups of hydraulic rods 2 (505) are fixedly connected to the upper surface of the base (511); the driving ends of the two groups of hydraulic rods 2 (505) are fixedly connected to a mounting platform (506); the upper surface of the mounting platform (506) is fixedly connected to a driver 1 (507); and the driving end of the driver 1 (507) is fixedly connected to a wedge-shaped locking block (508).

5. The shield machine cutter head structure according to claim 3, characterized in that: The tool locking assembly (5) further comprises a wedge-shaped locking groove (509), wherein the locking groove (509) is formed on the inner top wall of the cavity.

6. The shield machine cutter head structure according to claim 4, characterized in that: A guide assembly (8) is installed above the base (511), and the guide assembly (8) includes a second driver (81), the bottom end of the second driver (81) is fixedly connected to the upper surface of the base (511), the driving end of the second driver (81) is fixedly connected to a support column (82), the top end of the support column (82) is rotatably connected to a connecting plate (9), the driving end of the second hydraulic rod (505) passes through the connecting plate (9), and the connecting plate (9) is located below the mounting platform (506).

7. The shield machine cutter head structure according to claim 6, characterized in that: An electromagnetic ultrasonic transducer (83) is embedded and connected to the side wall of the support column (82), and the electromagnetic ultrasonic transducer (83) is electrically connected to an electromagnetic ultrasonic thickness gauge.

8. The shield machine cutter head structure according to claim 3, characterized in that: The inner wall of the blade body (61) is provided with a plurality of locking slots (63) distributed in an annular shape and at equal intervals.

9. The shield machine cutter head structure according to claim 6, characterized in that: The upper surface of the connecting plate (9) is fixedly connected to a fixing seat (10), the side wall of the fixing seat (10) is rotatably connected to a toothed ring (11), the toothed end of the toothed ring (11) is meshingly connected to a rack (12), the top end of the rack (12) is fixedly connected to the lower surface of the mounting platform (506), and the bottom end of the rack (12) penetrates and is slidably connected to the connecting plate (9).

10. The shield machine cutter head structure according to claim 9, characterized in that: The inner wall of the gear ring (11) is tapped to form a thread groove, the inner thread of the thread groove is connected to a lead screw (13), one end of the lead screw (13) passes through the fixed seat (10), the other end of the lead screw (13) is fixedly connected to a sliding seat (14), and the bottom end of the sliding seat (14) is slidably connected to the upper surface of the connecting plate (9).

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