A tool for replacing a rolling cutter of a tunneling machine cutter head and a method

Abstract

The application provides a tool and method for replacing a hob of a tunneling machine cutter head, wherein the tool comprises a base, a tool changing beam, a trolley, a hoist, a fastening bolt and a hob clamp; the base is fixedly installed on a support; the first end of the tool changing beam is rotatably installed on the base through a rotating shaft; the second end of the tool changing beam can rotate around the rotating shaft from a first position to a second position; when the second end of the tool changing beam is in the first position, the tool changing beam extends in the front-rear direction; when the second end of the tool changing beam is in the second position, the tool changing beam extends in the left-right direction; the second position is closer to the cutter head than the first position; the trolley is installed on the tool changing beam and can move along the tool changing beam; the hoist is installed on the trolley and is used for lifting the hob clamp to move in the up-down direction; the fastening bolt is used for fixedly connecting the base and the tool changing beam when the second end of the tool changing beam is in the first position or the second position; and the hob clamp is used for fixedly clamping the hob. The hob replacement efficiency is improved, and the construction period is shortened.

Description

Technical Field

[0001] This invention relates to the field of tunneling machine technology, and in particular to a tooling and method for replacing the cutterhead of a tunneling machine with roller cutters. Background Technology

[0002] Tunnel boring machines (TBMs) are gaining increasing attention across various industries due to their significant advantages in economy, safety, and efficiency in tunneling through rock formations. They are widely used in underground engineering projects such as railway tunnels, highway tunnels, water diversion tunnels, coal mine tunnels, and urban subway tunnels. One crucial aspect is the replacement of the cutterhead cutting tools, especially the hobbing cutters. Current limitations in cutterhead changing fixtures restrict the operation to a single location during each cutterhead replacement, consuming considerable time and requiring multiple rotations of the cutterhead for complete replacement. This severely impacts tunneling efficiency and construction time. Therefore, developing a new cutterhead changing fixture and method to improve tunneling efficiency and shorten construction time has become an urgent problem to be solved. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] In view of the problems existing in the above-mentioned technologies, the present invention provides solutions to at least some extent. Therefore, the first objective of the present invention is to provide a tooling for replacing cutterhead rollers on a tunneling machine, thereby improving cutterhead replacement efficiency and shortening the construction period.

[0005] The second objective of this invention is to provide a method for replacing the cutterhead hobs of a tunneling machine using the aforementioned tooling.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0008] In a first aspect, the present invention provides a tooling for replacing cutterheads of a tunneling machine, comprising a base, a cutterhead changing beam, a trolley, a hoist, fastening bolts, and a cutterhead clamp; the base is used to be fixedly installed on a support within the soil chamber; the first end of the cutterhead changing beam is rotatably mounted on the base via a rotating shaft, and the second end of the cutterhead changing beam can rotate around the rotating shaft from a first position to a second position. When the second end of the cutterhead changing beam is in the first position, the cutterhead changing beam extends in the front-rear direction; when the second end of the cutterhead changing beam is in the second position, the cutterhead changing beam extends in the left-right direction, and the second position is closer to the cutterhead than the first position; the trolley is mounted on the cutterhead changing beam and can move along the cutterhead changing beam; the hoist is mounted on the trolley, and the hook of the hoist hooks the cutterhead clamp for lifting the cutterhead clamp and moving it in the vertical direction; the fastening bolts are used to fix the base and the cutterhead changing beam when the second end of the cutterhead changing beam is in the first or second position; the cutterhead clamp is used to fix and clamp the cutterhead.

[0009] Optionally, the tool changer beam has a vertical plate and a horizontal plate connected sequentially from top to bottom; the trolley includes a support plate located below the tool changer beam, and the support plate is provided with a first guard plate and a second guard plate distributed on both sides of the tool changer beam. A first roller is rotatably installed on the inner side of the top of the first guard plate, and a second roller is rotatably installed on the inner side of the top of the second guard plate. The first roller and the second roller are engaged on the horizontal plate and can roll along the horizontal plate.

[0010] Optionally, the hoist is a manual chain hoist.

[0011] Optionally, the hobbing cutter clamp includes a first clamping plate, a second clamping plate, and a locking bolt; the first clamping plate and the second clamping plate are hinged to form a hinge position. The first clamping plate has a first claw portion in a semi-circular arc shape located on one side of the hinge position and a first fixing portion located on the other side of the hinge position. The second clamping plate has a second claw portion in a semi-circular arc shape located on one side of the hinge position and a second fixing portion located on the other side of the hinge position. The first claw portion is disposed corresponding to the second claw portion, and a first opening is formed between the first claw portion and the second claw portion. The first fixing portion is disposed corresponding to the second fixing portion, and a second opening is formed between the first fixing portion and the second fixing portion. The first clamping plate and / or the second clamping plate rotate to make the first opening and the second opening simultaneously larger or smaller. When the first fixing portion abuts against the second fixing portion, the first claw portion and the second claw portion can clamp the hobbing cutter. The locking bolt is used to fix the first fixing portion and the second fixing portion together when the first fixing portion abuts against the second fixing portion.

[0012] Optionally, a handle may be provided on the first fixing part and / or the second fixing part.

[0013] Optionally, the tooling for changing the cutterhead of the tunneling machine also includes a slide rail for detachably mounting at the cutterhead changing position, the slide rail being slidably connected to the cutterhead clamp.

[0014] Secondly, the present invention provides a method for replacing the cutterhead of a tunneling machine, based on the tooling described above installed on a support inside the soil chamber, comprising:

[0015] S1. Old cutter removal: Rotate the second end of the cutter replacement beam to the second position, and use fastening bolts to fix the base and the cutter replacement beam. Then, use a trolley to slide and a hoist to lift the cutter clamp to the position of the old cutter to be removed. Use the cutter clamp to fix and hold the old cutter to be removed, and then use a trolley to slide and a hoist to lift the old cutter to the transport position. After that, remove the fastening bolts, rotate the second end of the cutter replacement beam to the first position, and transport the old cutter out of the cutter head.

[0016] S2. New cutter installation: When the second end of the cutter changer beam is in the first position, use a roller cutter clamp to fix and hold the new cutter; rotate the second end of the cutter changer beam from the first position to the second position, use fastening bolts to fix the connection between the base and the cutter changer beam, and then use a trolley to slide and a hoist to lift and lower the roller cutter clamp to the position where the new cutter is to be installed, and install the new cutter into the new cutter to be installed.

[0017] Optionally, the cutter clamp is lowered to the position of the old cutter to be removed by sliding a trolley and lifting with a hoist, including: setting up a slide rail at the position of the old cutter to be removed; lowering the cutter clamp to the slide rail by sliding a trolley and lifting with a hoist; connecting the cutter clamp and the slide rail; and then sliding the cutter clamp along the slide rail to the position of the old cutter to be removed; and / or,

[0018] The process involves lowering the roller cutter clamp for holding the new cutter to the position where the new cutter is to be installed by sliding the trolley and lifting with a hoist. This includes: setting up a slide rail at the position where the new cutter is to be installed; lowering the roller cutter clamp for holding the new cutter to the slide rail by sliding the trolley and lifting with a hoist; connecting the roller cutter clamp and the slide rail; and then sliding the roller cutter clamp along the slide rail to the position where the new cutter is to be installed.

[0019] Optionally, the method for replacing the cutterhead of a tunneling machine provided by the present invention is based on two tooling fixtures arranged sequentially in the left-right direction on a support installed inside the soil chamber. These two tooling fixtures are located at the center of the soil chamber.

[0020] Optionally, the method for replacing the cutterhead cutter in a tunneling machine also includes: S3, after the cutterhead cutter replacement work is completed, the tooling is put into storage state by lifting with a hoist, sliding with a trolley and rotating with a cutter replacement beam, and the base and cutter replacement beam are fixed with fastening bolts.

[0021] (III) Beneficial Effects

[0022] The beneficial effects of this invention are:

[0023] The tooling for replacing cutterhead cutters on a tunneling machine provided by this invention involves rotatably mounting a cutter-changing beam on a base and rotating it between a first position and a second position to perform cutter replacement. When the second end of the cutter-changing beam rotates to the first position, it moves away from the cutterhead, facilitating the transport of old cutters from the cutterhead by the trolley and the transport of new cutters from outside the cutterhead to inside. When the second end of the cutter-changing beam rotates to the second position, it extends laterally and approaches the cutterhead. The trolley moves along the cutter-changing beam, enabling the replacement of cutters at multiple positions on the cutterhead corresponding to the cutterhead. This reduces the number of cutterhead rotations during the replacement process, improves cutter replacement efficiency, and shortens the construction period. The base and the cutter-changing beam are fixedly connected by fastening bolts when the second end of the cutter-changing beam is in the second position, ensuring stable positioning of the cutter replacement position and preventing undesirable rotation of the cutter-changing beam. Attached Figure Description

[0024] The present invention is described with reference to the following figures:

[0025] Figure 1 This is a schematic diagram of the first structure of the tooling installed on the support inside the soil chamber according to Embodiment 1 of the present invention. It shows that two toolings are installed on the support inside the soil chamber. The second ends of the tool changing beams of the two toolings are both in the second position. It also shows that the hobbing clamp in one tooling is in the position of the old tool to be removed and the transport position.

[0026] Figure 2 This is a schematic diagram of the second structure of the tooling installed on the support inside the soil chamber according to Embodiment 1 of the present invention, wherein the second end of the tooling's tool changing beam is shown to be in the first position;

[0027] Figure 3 yes Figure 2 A schematic diagram of the first rotation of the tool changer beam from the perspective of A, wherein the second end of the tool changer beam is in the first position;

[0028] Figure 4 yes Figure 2 A schematic diagram of the second rotation of the tool changer beam from the perspective of A, wherein the second end of the tool changer beam is in the second position;

[0029] Figure 5 This is a schematic diagram of the cooperation between the slide rail mounted on the cutter head and the hobbing clamp according to Embodiment 1 of the present invention;

[0030] Figure 6 This is a schematic diagram of the hobbing tool fixture according to Embodiment 1 of the present invention.

[0031] [Explanation of Labels in the Attached Image]

[0032] 1: Cutter head;

[0033] 21: Base; 22: Tool changer beam; 23: Trolley; 24: Hoist; 25: Fastening bolts; 26: Shaft;

[0034] 221: Horizontal plate;

[0035] 231: First guard plate; 232: First roller;

[0036] 31: Hinge joint; 32: First claw portion; 33: First fixing portion; 34: Second claw portion; 35: Second fixing portion; 36: Locking bolt; 37: Handle;

[0037] 4: Slide rail. Detailed Implementation

[0038] To better explain and facilitate understanding of the present invention, a detailed description of the invention is provided below with reference to the accompanying drawings and specific embodiments. In this document, directional terms such as "upper," "lower," "front," "back," "left," and "right" are used interchangeably. Figure 1 and Figure 2 The orientation is used as a reference.

[0039] Example 1

[0040] It should be noted that the tunneling machine includes a cutterhead 1 and a soil chamber arranged in sequence. The cutterhead 1 excavates the strata at the working face and transports the excavated soil into the soil chamber, which has a support that does not move with the cutterhead 1.

[0041] like Figures 1 to 6 As shown, this embodiment provides a tooling for changing the cutterhead of a tunneling machine, which includes a cutter hoisting mechanism and a cutter clamp.

[0042] like Figures 1 to 4 As shown, the cutter hoisting mechanism includes a base 21, a cutter changing beam 22, a trolley 23, a hoist 24, and fastening bolts 25; the base 21 is used for fixed installation on a bracket; the first end of the cutter changing beam 22 is rotatably mounted on the base 21 via a rotating shaft 26, and the second end of the cutter changing beam 22 can rotate around the rotating shaft 26 from a first position to a second position. When the second end of the cutter changing beam 22 is in the first position (e.g., ...), ... Figure 2 and Figure 3 As shown), the tool changer beam 22 extends in the front-to-back direction, and when the second end of the tool changer beam 22 is in the second position (as shown), Figure 1 and Figure 4 As shown, the tool changer beam 22 extends in the left-right direction, and the second position is closer to the cutter head 1 than the first position; the trolley 23 is mounted on the tool changer beam 22 and can move along the tool changer beam 22; the hoist 24 is mounted on the trolley 23, and the hook of the hoist 24 hooks the roller cutter clamp for lifting the roller cutter clamp to move in the up-down direction; the fastening bolt 25 is used to fix the base 21 and the tool changer beam 22 when the second end of the tool changer beam 22 is in the first position or the second position.

[0043] like Figure 1 and Figure 6 As shown, the hob clamp is used to fix and hold the hob.

[0044] The fixture described above allows for tool changing by rotatably mounting the tool changing beam 22 on the base 21 and rotating it between a first position and a second position. When the second end of the tool changing beam 22 rotates to the first position, it moves away from the cutter head 1, facilitating the trolley 23 to transport the old tool out of the cutter head 1 and to transport the new tool from outside the cutter head 1. When the second end of the tool changing beam 22 rotates to the second position, it extends laterally and approaches the cutter head 1. The trolley 23 moves along the tool changing beam 22, allowing for the replacement of multiple cutters on the cutter head 1 corresponding to the tool changing beam 22. This reduces the number of rotations of the cutter head 1 during tool changing, improves cutter replacement efficiency, and shortens the construction period. The base 21 and the tool changing beam 22 are fixedly connected by fastening bolts 25 when the second end of the tool changing beam 22 is in the second position, ensuring stable tool changing position and preventing undesirable rotation of the tool changing beam 22.

[0045] Preferably, the tool changer beam 22 has a vertical plate and a horizontal plate 221 connected sequentially from top to bottom; the trolley 23 includes a support plate located below the tool changer beam 22, and the support plate is provided with a first guard plate 231 and a second guard plate distributed on both sides of the tool changer beam 22. A first roller 232 is rotatably mounted on the inner side of the top end of the first guard plate 231, and a second roller is rotatably mounted on the inner side of the top end of the second guard plate. The first roller 232 and the second roller are engaged on the horizontal plate 221 and can roll along the horizontal plate 221. In this way, both the installation stability of the trolley 23 on the tool changer beam 22 and the movement stability of the trolley 23 on the tool changer beam 22 are ensured.

[0046] More preferably, the second end of the tool changer beam 22 has a limiting block. When the trolley 23 moves to abut against the limiting block, the limiting block prevents the trolley 23 from continuing to move away from the first end of the tool changer beam 22. This ensures the safety of the trolley 23's movement and prevents the trolley 23 from detaching from the tool changer beam 22 during movement.

[0047] Preferably, in this embodiment, the hoist 24 is a manual chain hoist. It has a simple structure and low cost. Optionally, the hoist 24 is a pneumatic hoist.

[0048] like Figure 1 , Figure 5 and Figure 6As shown, the hobbing cutter clamp includes a first clamping plate, a second clamping plate, and a locking bolt 36. The first clamping plate and the second clamping plate are hinged to form a hinge position 31. The first clamping plate has a semi-circular first jaw portion 32 located on one side of the hinge position 31 and a first fixing portion 33 located on the other side of the hinge position 31. The second clamping plate has a semi-circular second jaw portion 34 located on one side of the hinge position 31 and a second fixing portion 35 located on the other side of the hinge position 31. The first jaw portion 32 is disposed corresponding to the second jaw portion 34, and a first opening is formed between the first jaw portion 32 and the second jaw portion 34. Part 33 is provided corresponding to the second fixing part 35, and a second opening is formed between the first fixing part 33 and the second fixing part 35. The first clamping plate and / or the second clamping plate rotate, causing the first and second openings to simultaneously enlarge or shrink. When the first fixing part 33 abuts against the second fixing part 35 (i.e., when the second opening is at its smallest, the first opening is also at its smallest), the first jaw part 32 and the second jaw part 34 can clamp the hob. The locking bolt 36 is used to fix the first fixing part 33 and the second fixing part 35 together when they abut against each other. This hob clamp can achieve fixed clamping of the hob, and its operation is simple.

[0049] Preferably, a handle 37 is provided on the first fixing part 33 and / or the second fixing part 35. Since the hobbing cutter clamp is relatively heavy, the handle 37 facilitates the operator to fine-tune the position of the hobbing cutter clamp to align it with the cutter holder.

[0050] Preferably, the tooling for replacing the cutterhead cutter in this embodiment further includes a slide rail 4. The slide rail 4 is detachably mounted on the cutterhead 1 at the cutter replacement position, and can be slidably connected to the cutterhead clamp. Since the cutterhead clamp is relatively heavy, by setting the slide rail 4 to slide along the slide rail 4, the position of the cutterhead clamp can be adjusted to align with the cutter holder of the cutter to be replaced. This facilitates the replacement of cutters at multiple positions corresponding to the cutter replacement beam 22, saving effort.

[0051] Example 2

[0052] This embodiment provides a method for replacing the hobbing cutter head 1 of a tunneling machine, based on the tooling described in Embodiment 1 mounted on a support, including the following steps:

[0053] S1. Removal of old cutter: Rotate the second end of the cutter replacement beam 22 to the second position, and use the fastening bolts 25 to fix the base 21 and the cutter replacement beam 22. Then, use the trolley 23 to slide and the hoist 24 to lift and lower the cutter clamp to the position of the old cutter to be removed. Use the cutter clamp to fix and hold the old cutter to be removed. Then, use the trolley 23 to slide and the hoist 24 to lift and move the old cutter to the transport position. After that, remove the fastening bolts 25, rotate the second end of the cutter replacement beam 22 to the first position, and transport the old cutter out of the cutter head 1.

[0054] S2. New blade installation: When the second end of the blade changing beam 22 is in the first position, the new blade is fixed and clamped by the roller clamp; the second end of the blade changing beam 22 is rotated from the first position to the second position, and the base 21 and the blade changing beam 22 are fixedly connected by the fastening bolt 25. Then, the roller clamp for clamping the new blade is lowered to the position where the new blade is to be installed by the sliding of the trolley 23 and the lifting of the hoist 24, and the new blade is installed into the new blade to be installed.

[0055] In this way, the operation is simple. When the second end of the cutter head 22 rotates to the second position, the trolley 23 slides and the hoist 24 lifts the cutter head 1, which can replace the cutter head 1 at multiple positions corresponding to the cutter head 22. This reduces the number of times the cutter head 1 rotates during the cutter replacement process, improves the cutter replacement efficiency, and shortens the construction period.

[0056] Preferably, in the method for replacing the cutterhead 1 of a tunneling machine provided in this embodiment, the cutterhead clamp is lowered to the position of the old cutter to be removed by sliding the trolley 23 and lifting the hoist 24. This includes: setting up a slide rail 4 at the position of the old cutter to be removed; lowering the cutterhead clamp to the slide rail 4 by sliding the trolley 23 and lifting the hoist 24; connecting the cutterhead clamp and the slide rail 4; and then sliding the cutterhead clamp along the slide rail 4 to the position of the old cutter to be removed. Figure 5 As shown. And / or, by sliding the trolley 23 and lifting the hoist 24, the roller cutter clamp for holding the new cutter is lowered to the position where the new cutter is to be installed, including: setting up the slide rail 4 at the position where the new cutter is to be installed, lowering the roller cutter clamp for holding the new cutter to the slide rail 4 by sliding the trolley 23 and lifting the hoist 24, connecting the roller cutter clamp and the slide rail 4, and then sliding the roller cutter clamp along the slide rail 4 to the position where the new cutter is to be installed.

[0057] More preferably, a slide rail 4 is installed at the location where the old cutter is to be removed, with the first end of the slide rail 4 above the second end, and the second end corresponding to the location of the old cutter. The cutter clamp is lowered to the first end of the slide rail 4 by sliding the trolley 23 and lifting the hoist 24. Similarly, a slide rail 4 is installed at the location where the new cutter is to be installed, with the first end above the second end, and the second end corresponding to the location of the new cutter. The cutter clamp is lowered to the first end of the slide rail 4 by sliding the trolley 23 and lifting the hoist 24. In this way, gravity facilitates the sliding of the cutter clamp along the slide rail 4.

[0058] Because the complex structure inside the earth chamber can hinder the lifting process of the cutter clamp, there are situations where the cutter clamp cannot be smoothly lowered to the positions where the old cutter is to be removed and the new cutter is to be installed. Therefore, by setting up slide rail 4, the lowering path of the cutter clamp is changed, avoiding the complex structure inside the earth chamber that hinders the lifting of the cutter clamp, and ensuring that the cutter clamp is smoothly lowered to the positions where the old cutter is to be removed and the new cutter is to be installed.

[0059] Preferably, the method for replacing the cutterhead 1 cutter of the tunneling machine provided in this embodiment is based on two tooling fixtures arranged sequentially in the left-right direction and mounted on a support. These two tooling fixtures are located at the center of the soil chamber, such as... Figure 1 As shown. In this way, by using two tooling fixtures to replace the cutter head 1 hobbing cutter, the efficiency of hobbing cutter replacement is further improved and the construction period is shortened.

[0060] Further preferably, the method for replacing the cutterhead 1 cutters of the tunneling machine provided in this embodiment further includes: S0, rotating the cutterhead 1 by 0°, 90°, 180° and 270° respectively, and replacing the cutters of the cutterhead 1 by performing S1 and S2 sequentially after each rotation of the cutterhead 1. In this way, all the cutters on the cutterhead 1 can be replaced by rotating the cutterhead only 14 times, which greatly improves the efficiency of cutter replacement.

[0061] Preferably, the method for replacing the cutterhead 1 cutter rollers of the tunneling machine provided in this embodiment further includes: S3, after the replacement of the cutterhead 1 cutter rollers is completed, the tooling is lifted by the hoist 24, slid by the trolley 23, and rotated by the cutter replacement beam 22, so that the tooling is in a retracted state, and the base 21 and the cutter replacement beam 22 are fixedly connected by fastening bolts 25. The tooling in the retracted state does not affect the subsequent tunneling work of the tunneling machine. Thus, after the replacement of the cutterhead 1 cutter rollers is completed, there is no need to remove the tooling; simply keeping the tooling in a stable retracted state does not affect the tunneling work of the tunneling machine, and it is convenient for the subsequent reuse of the tooling.

[0062] Furthermore, in this embodiment, the tooling is in a stowed state, and the second end of the tool changer beam 22 is in the first position.

[0063] It should be understood that the above description of specific embodiments of the present invention is only for illustrating the technical approach and features of the present invention, and is intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. However, the present invention is not limited to the specific embodiments described above. All changes or modifications made within the scope of the claims of the present invention should be covered within the protection scope of the present invention.

Claims

1. A tooling for replacing the hobbing cutter on the cutterhead of a tunneling machine, characterized in that, Includes base (21), cutter beam (22), trolley (23), hoist (24), fastening bolts (25) and cutter clamp; The base (21) is used to fix the support inside the soil chamber; The first end of the tool changing beam (22) is rotatably mounted on the base (21) via the rotating shaft (26). The second end of the tool changing beam (22) can rotate around the rotating shaft (26) from the first position to the second position. When the second end of the tool changing beam (22) is in the first position, the tool changing beam (22) extends in the front-back direction. When the second end of the tool changing beam (22) is in the second position, the tool changing beam (22) extends in the left-right direction. The second position is closer to the tool disc than the first position. The trolley (23) is mounted on the tool changing beam (22) and can move along the tool changing beam (22); the tool changing beam (22) has a vertical plate and a horizontal plate (221) connected from top to bottom; the trolley (23) includes a support plate located below the tool changing beam (22), and the support plate is provided with a first guard plate (231) and a second guard plate distributed on both sides of the tool changing beam (22). A first roller (232) is rotatably mounted on the inner side of the top of the first guard plate (231), and a second roller is rotatably mounted on the inner side of the top of the second guard plate. The first roller (232) and the second roller are engaged on the horizontal plate (221) and can roll along the horizontal plate (221); the second end of the tool changing beam (22) has a limiting block. When the trolley (23) moves to abut against the limiting block, the limiting block prevents the trolley (23) from continuing to move away from the first end of the tool changing beam (22); The hoist (24) is installed on the trolley (23). The hook of the hoist (24) is hooked to the cutter clamp for lifting the cutter clamp to move in the vertical direction. The fastening bolt (25) is used to fix the connection base (21) and the tool changer (22) when the second end of the tool changer (22) is in the first position or the second position. The hob clamp is used to hold and fix the hob. The tooling also includes a slide rail (4) for detachable mounting at the tool change position on the cutter head, the slide rail (4) being slidably connected to the hobbing fixture.

2. The tooling for replacing the hob cutter on the cutterhead of a tunneling machine according to claim 1, characterized in that, The hoist (24) is a hand chain hoist.

3. The tooling for replacing the hob cutter on the cutterhead of a tunneling machine according to claim 1, characterized in that, The hobbing cutter clamp includes a first clamping plate, a second clamping plate, and a locking bolt (36); The first and second plates are hinged to form a hinge position (31). The first plate has a first claw portion (32) in the shape of a semi-circular arc on one side of the hinge position (31) and a first fixing portion (33) on the other side of the hinge position (31). The second plate has a second claw portion (34) in the shape of a semi-circular arc on one side of the hinge position (31) and a second fixing portion (35) on the other side of the hinge position (31). The first claw portion (32) is provided corresponding to the second claw portion (34). A first opening is formed between the first claw portion (32) and the second claw portion (34). The first fixing portion (33) is provided corresponding to the second fixing portion (35). A second opening is formed between the first fixing portion (33) and the second fixing portion (35). The first and / or second clamping plates rotate to make the first and second openings simultaneously larger or smaller. When the first fixing part (33) and the second fixing part (35) abut against each other, the first claw part (32) and the second claw part (34) can clamp the hob. The locking bolt (36) is used to fix the first fixing part (33) and the second fixing part (35) together when the first fixing part (33) and the second fixing part (35) abut against each other.

4. The tooling for replacing the hob cutter on the cutterhead of a tunneling machine according to claim 3, characterized in that, A handle (37) is provided on the first fixing part (33) and / or the second fixing part (35).

5. A method for replacing the hobbing cutter on a tunneling machine cutterhead, characterized in that, Based on the tooling described in any one of claims 1 to 4, installed on the support inside the earth chamber, including: S1. Removal of old cutter: Rotate the second end of the cutter replacement beam (22) to the second position, and use fastening bolts (25) to fix the base (21) and the cutter replacement beam (22). Then, use the trolley (23) to slide and the hoist (24) to lift the cutter clamp to the position of the old cutter to be removed. Use the cutter clamp to fix and hold the old cutter to be removed. Then, use the trolley (23) to slide and the hoist (24) to lift the old cutter to the transport position. After that, remove the fastening bolts (25), rotate the second end of the cutter replacement beam (22) to the first position, and transport the old cutter out of the cutter head. S2. New knife installation: When the second end of the tool changing beam (22) is in the first position, the new knife is fixed and clamped by the roller clamp; the second end of the tool changing beam (22) is rotated from the first position to the second position, and the base (21) and the tool changing beam (22) are fixed and connected by the fastening bolt (25). Then, the roller clamp for clamping the new knife is lowered to the position where the new knife is to be installed by the sliding of the trolley (23) and the hoist (24). The new knife is then installed into the new knife to be installed.

6. The method for replacing the cutterhead cutter of a tunneling machine according to claim 5, characterized in that, The rolling cutter clamp is lowered to the position of the old cutter to be removed by sliding the trolley (23) and lifting the hoist (24), including: setting up a slide rail (4) at the position of the old cutter to be removed; lowering the rolling cutter clamp to the slide rail (4) by sliding the trolley (23) and lifting the hoist (24); connecting the rolling cutter clamp and the slide rail (4); and then sliding the rolling cutter clamp along the slide rail (4) to the position of the old cutter to be removed; and / or, The new cutter clamp is lowered to the position where the new cutter is to be installed by sliding the trolley (23) and lifting the hoist (24). This includes: setting up a slide rail (4) at the position where the new cutter is to be installed; lowering the new cutter clamp to the slide rail (4) by sliding the trolley (23) and lifting the hoist (24); connecting the cutter clamp and the slide rail (4); and then sliding the cutter clamp along the slide rail (4) to the position where the new cutter is to be installed.

7. The method for replacing the cutterhead cutter of a tunneling machine according to claim 5, characterized in that, This is achieved by using two tooling fixtures arranged sequentially in the left-right direction on a support frame installed inside the soil chamber. These two tooling fixtures are located at the center of the soil chamber.

8. The method for replacing the cutterhead cutter of a tunneling machine according to claim 5, characterized in that, Also includes: S3. After the replacement of the cutter head hoist is completed, the tooling is put into storage state by lifting with a hoist (24), sliding with a trolley (23) and rotating with a tool changing beam (22), and the base (21) and tool changing beam (22) are fixed with fastening bolts (25).

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