A composite cutter head structure for TBM construction

Abstract

A cutter head structure for composite TBM construction, comprising a cutter head body and a variable-distance connecting assembly, wherein the variable-distance connecting assembly comprises a cylindrical shell, a sliding block, a transmission assembly and a limiting assembly, the cylindrical shell is arranged on the mounting portion of the cutter head body, the sliding block is movably arranged on the cylindrical shell in an array, the sliding block is provided with a threaded hole, the transmission assembly is arranged inside the cylindrical shell and can drive all the sliding blocks to move synchronously, and the limiting assembly is further arranged inside the cylindrical shell to limit the sliding of the sliding block. By arranging the variable-distance connecting assembly, the position of the threaded hole can be changed through the sliding block, and then the cutter head can be connected with different shield machines, so that the cutter head does not need to be replaced according to the shield machine, the replacement of the cutter head is simpler, and the construction efficiency is improved. By arranging the reinforcing support, the cutter head base frame can be reinforced, and then the anti-deformation ability of the outer side of the cutter head is enhanced, and the deformation of the cutter head base frame caused by the concentrated edge load is reduced.

Description

Technical Field

[0001] This utility model relates to the field of TBM construction technology, specifically to a composite TBM cutterhead structure. Background Technology

[0002] Application number CN202421403113.1 discloses a cutterhead, support, and tunneling assembly for a pipe jacking machine. The tunneling assembly includes a main boom assembly and a secondary boom assembly, both of which are installed on one side of the support. The support is provided with a first ring beam and a second ring beam, both of which are located on one side of the support, with the first ring beam sleeved on the outside of the second ring beam. The main boom assembly is installed on the first ring beam, and the secondary boom assembly is installed between the first and second ring beams.

[0003] The aforementioned existing technologies are difficult to interface with different tunnel boring machines (TBMs), making it necessary to select a suitable cutterhead for interface with the TBM, which is therefore quite cumbersome to use. Utility Model Content

[0004] The purpose of this invention is to provide a composite cutterhead structure for TBM construction to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A composite TBM cutterhead structure includes a cutterhead body and a pitch-changing connection assembly, wherein:

[0007] The variable pitch connection assembly includes a cylindrical shell, a slider, a transmission assembly, and a limiting assembly. The cylindrical shell is mounted on the mounting part of the cutter head body. The cylindrical shell has sliders arranged in a circumferential array. The sliders have threaded holes. The cylindrical shell has a transmission assembly inside that can drive all sliders to move synchronously. The cylindrical shell also has a limiting assembly inside that restricts the sliding of the sliders.

[0008] Preferably, the transmission assembly includes a rotating disk, an arc-shaped groove, and a rotating column. The rotating disk is rotatably installed inside a cylindrical shell. The rotating disk has an circumferential array of arc-shaped grooves, the same number as the number of sliders. The sliders are engaged in the arc-shaped grooves by guide rods provided thereon. The rotating column is vertically and movably installed at the upper end of the cylindrical shell, and the other end of the rotating column is vertically and movably engaged on the rotating disk.

[0009] Preferably, the limiting assembly includes a pressing block, a T-shaped connecting rod, a connecting ring, a connecting rod, and a locking bolt. The pressing block is movably mounted on the cylindrical outer shell and is arranged on both sides of the slider. The T-shaped connecting rod is movably mounted on the cylindrical outer shell. The two sides of the T-shaped connecting rod slide in contact with the pressing blocks on the adjacent sides of the two sliders. The connecting ring is rotatably mounted on the rotating column. A connecting rod is hinged to the T-shaped connecting rod, and the other end of the connecting rod is hinged to the connecting ring. A locking bolt for fixing the rotating column is provided on the rotating column.

[0010] Preferably, the cutter head body includes a cutter head base frame and reinforcing supports, the reinforcing supports are arranged in a circumferential array on the back side of the cutter head base frame, and the cylindrical outer shell is disposed on the mounting part of the cutter head base frame.

[0011] Preferably, the reinforcing support includes a central support, an outer hoop, and a stress-relieving sleeve. The outer hoop is fitted on the outside of the central support, and a stress-relieving sleeve connects the central support and the outer hoop.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This utility model discloses a composite cutterhead structure for TBM construction. During operation, by setting up a variable-pitch connection component, the position of the threaded hole can be changed by a slider, allowing it to connect with different tunnel boring machines (TBMs). This eliminates the need to change the cutterhead for each TBM, simplifying cutterhead replacement and improving construction efficiency. Furthermore, by setting up a reinforcing support, the cutterhead base frame can be strengthened, thereby enhancing the deformation resistance of the cutterhead's outer side and reducing deformation of the cutterhead base frame caused by concentrated edge loads. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the rear of the overall structure of this utility model;

[0015] Figure 2 This is a front view of the overall structure of this utility model;

[0016] Figure 3 This is a three-dimensional schematic diagram of the variable pitch connection component in this utility model;

[0017] Figure 4 This is a three-dimensional internal schematic diagram of the variable pitch connection component in this utility model;

[0018] Figure 5 This is a three-dimensional schematic diagram of the limiting component in this utility model;

[0019] Figure 6 This is a three-dimensional schematic diagram of the transmission component in this utility model;

[0020] Figure 7 This is a side view of the reinforcing support in this utility model.

[0021] In the figure: 1. Cutter head body, 2. Pitch-changing connection assembly, 11. Cutter head base frame, 12. Reinforcing support, 21. Cylindrical shell, 22. Slider, 23. Transmission assembly, 24. Limiting assembly, 121. Central support, 122. Outer sleeve, 123. Pressure relief sleeve, 231. Rotating disk, 232. Arc groove, 233. Rotating column, 241. Extrusion block, 242. T-shaped connecting rod, 243. Connecting ring, 244. Connecting rod, 245. Locking bolt. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example:

[0024] Please see Figures 1 to 7 This utility model provides a technical solution:

[0025] A composite TBM cutterhead structure includes a cutterhead body 1 and a variable pitch connection assembly 2, wherein:

[0026] The variable pitch connection assembly 2 includes a cylindrical shell 21, sliders 22, a transmission assembly 23, and a limiting assembly 24. The cylindrical shell 21 is mounted on the mounting part of the cutterhead body 1. The cylindrical shell 21 is circumferentially arranged with sliders 22. The sliders 22 are horizontally movable in the axial direction of the cylindrical shell 21. The sliders 22 are provided with threaded holes, through which external flanges can be connected to the tunnel boring machine. The cylindrical shell 21 is provided with a transmission assembly 23 that can drive all sliders 22 to move synchronously. By adjusting the position of the sliders 22, they can be connected to different tunnel boring machines. The cylindrical shell 21 is also provided with a limiting assembly 24 that restricts the sliding of the sliders 22.

[0027] In a preferred embodiment, the transmission assembly 23 includes a rotating disk 231, an arc-shaped groove 232, and a rotating column 233. The rotating disk 231 is rotatably mounted inside the cylindrical shell 21. The rotating disk 231 has an circumferential array of arc-shaped grooves 232, the same number as the number of sliders 22. The sliders 22 are engaged in the arc-shaped grooves 232 by guide rods provided thereon. The rotating column 233 is vertically and movably mounted on the upper end of the cylindrical shell 21. The rotating column 233 and the cylindrical shell 21 are engaged by a keyway. The other end of the rotating column 233 is vertically engaged on the upper mounting rod of the rotating disk 231. The rotating column 233 and the upper mounting rod of the rotating disk 231 are engaged by a keyway, so that rotating the rotating column 233 can drive the rotating disk 231 to rotate. At the same time, vertically pulling the rotating column 233 can make the rotating column 233 move vertically on the upper mounting part of the rotating disk 231. The rotating column 233 is located outside the cylindrical shell 21. Rotating the rotating disk 231 can drive all the sliders 22 to move synchronously through the arc groove 232.

[0028] In a preferred embodiment, the limiting component 24 includes a pressing block 241, a T-shaped connecting rod 242, a connecting ring 243, a connecting rod 244, and a locking bolt 245. The pressing block 241 is movably mounted on the cylindrical outer shell 21 and is arranged on both sides of the slider 22. The two pressing blocks 241 press the slider 22, and the friction between the pressing block 241 and the slider 22 achieves the purpose of fixing the slider 22. This ensures that when the tunnel boring machine drives the cutterhead to rotate, the slider 22 is not fixed to the rotating disk 231 only by the arc groove 232. Relying solely on the keyway between the slider 22 and the rotating disk 231 can easily accelerate the wear of the variable pitch connection component 2. However, the secondary fixation through the friction between the pressing block 241 and the slider 22 reduces the wear of the variable pitch connection component 2 and extends the service life of the device. T-shaped connecting rod 242 is movably mounted on cylindrical shell 21. The two sides of the straight end of T-shaped connecting rod 242 are in sliding contact with the pressing blocks 241 on the adjacent sides of the two sliders 22. Pulling T-shaped connecting rod 242 toward the center of cylindrical shell 21 can push the pressing blocks 241 closer to the sliders 22, and vice versa. Connecting ring 243 is rotatably mounted on rotating column 233. When rotating column 233 rotates, it will not drive connecting ring 243 to rotate. Connecting rod 244 is hinged to T-shaped connecting rod 242. The other end of connecting rod 244 is hinged to connecting ring 243. Pushing rotating column 233 downward can drive all T-shaped connecting rods 242 toward the center of cylindrical shell 21 through connecting ring 243 and connecting rod 244. Then, through the friction between pressing block 241 and slider 22, the slider 22 is fixed. Conversely, the locking mechanism is released, and a locking bolt 245 is provided on the rotating column 233 to fix the rotating column 233. The rotating column 233 can be fixed to the cylindrical outer shell 21 by means of the locking bolt 245.

[0029] In a preferred embodiment, the cutter head body 1 includes a cutter head base frame 11 and a reinforcing support 12. The reinforcing support 21 is arranged in a circumferential array on the back side of the cutter head base frame 11, and a cylindrical outer shell 21 is provided on the mounting part of the cutter head base frame 11.

[0030] In a preferred embodiment, the reinforcing support 12 includes a central support 121, an outer hoop 122, and a stress-relieving sleeve 123. The outer hoop 122 is fitted on the outside of the central support 121, and the stress-relieving sleeve 123 connects the central support 121 and the outer hoop 122.

[0031] The working principle of this utility model:

[0032] In use, this device first rotates the rotating disk 231 according to the type of tunnel boring machine, which drives all the sliders 22 to move synchronously through the arc groove 232, thereby adjusting the position of the threaded holes on the sliders 22. Then, the rotating column 233 is pushed downward, which drives all the T-shaped connecting rods 242 to move towards the center of the cylindrical shell 21 through the connecting ring 243 and the connecting rod 244. The friction between the pressing block 241 and the slider 22 is used to fix the slider 22. Then, the rotating column 233 is fixed to the cylindrical shell 21 by the locking bolt 245, and finally connected to the tunnel boring machine through the flange.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A composite TBM cutterhead structure, comprising a cutterhead body (1) and a variable pitch connection assembly (2), characterized in that: The variable pitch connection assembly (2) includes a cylindrical shell (21), a slider (22), a transmission assembly (23), and a limiting assembly (24). The cylindrical shell (21) is mounted on the mounting part of the cutter head body (1). The cylindrical shell (21) is circumferentially arrayed with sliders (22). The sliders (22) are provided with threaded holes. The cylindrical shell (21) is provided with a transmission assembly (23) that can drive all sliders (22) to move synchronously. The cylindrical shell (21) is also provided with a limiting assembly (24) that restricts the sliding of sliders (22).

2. The composite TBM cutterhead structure according to claim 1, characterized in that: The transmission assembly (23) includes a rotating disk (231), an arc groove (232), and a rotating column (233). The rotating disk (231) is rotatably installed inside the cylindrical shell (21). The rotating disk (231) has an circumferential array of arc grooves (232) in the same number as the slider (22). The slider (22) is engaged in the arc groove (232) by a guide rod provided thereon. The rotating column (233) is vertically and movably installed at the upper end of the cylindrical shell (21). The other end of the rotating column (233) is vertically and movably engaged on the rotating disk (231).

3. The composite TBM cutterhead structure according to claim 2, characterized in that: The limiting component (24) includes a pressing block (241), a T-shaped connecting rod (242), a connecting ring (243), a connecting rod (244), and a locking bolt (245). The pressing block (241) is movably mounted on the cylindrical shell (21) and is arranged on both sides of the slider (22). The T-shaped connecting rod (242) is movably mounted on the cylindrical shell (21). The two sides of the T-shaped connecting rod (242) slide in contact with the pressing blocks (241) of the two sliders (22) on the side that are close to each other. The connecting ring (243) is rotatably mounted on the rotating column (233). The connecting rod (244) is hinged on the T-shaped connecting rod (242). The other end of the connecting rod (244) is hinged on the connecting ring (243). The rotating column (233) is provided with a locking bolt (245) for fixing the rotating column (233).

4. The composite TBM cutterhead structure according to claim 2, characterized in that: The cutter head body (1) includes a cutter head base frame (11) and a reinforcing support (12). The reinforcing support (12) is arranged in a circumferential array on the back side of the cutter head base frame (11). The cylindrical outer shell (21) is provided on the mounting part of the cutter head base frame (11).

5. The composite TBM cutterhead structure according to claim 4, characterized in that: The reinforcing support (12) includes a central support (121), an outer hoop (122), and a pressure relief sleeve (123). The outer hoop (122) is fitted on the outside of the central support (121), and the pressure relief sleeve (123) is connected between the central support (121) and the outer hoop (122).

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