Cutter holder and cutter head of shield tunneling machine cutter and shield tunneling machine

Abstract

The utility model provides a cutter holder and a cutter head of a shield tunneling machine cutter and a shield tunneling machine, the cutter holder comprises two symmetrically arranged main bodies, and two parallel fixed side plates are respectively inserted between the two main bodies in a close fit manner; the inner wall of the main body is provided with a sliding groove for the hob shaft to move and an installation groove for the wedge-shaped block to be installed, the sliding groove is communicated with the installation groove, the hob shaft is fastened in the sliding groove through the wedge-shaped block, the inner wall of the main body is further provided with a first installation hole for being connected with a cutter head bolt, and the first installation hole is located in the side wall of the communication area of the sliding groove and the installation groove. The cutter holder of the shield tunneling machine is of a detachable structure, the main body and the cutter head are detachably installed through the screws, when the contact position of the main body and a hob shaft deforms, the main body is convenient to replace, the fixed side plates and the main body are connected in a tight fit inserting mode, the fixed side plates of different types can be matched, and the shield tunneling machine is convenient to use. And different cutters can be mounted between the main bodies, so that the flexibility and applicability of the cutters are improved.

Description

Technical Field

[0001] This utility model belongs to the field of tunnel boring machine technology, and specifically relates to a cutter holder, cutter head and tunnel boring machine for tunnel boring machine cutters. Background Technology

[0002] Tunnel boring machines (TBMs) are the most commonly used equipment in tunnel engineering. They rely on cutting tools to cut through the soil and advance forward. During the tunneling process, the cutting tools are inevitably subjected to impact damage and wear, so they need to be replaced after a period of use.

[0003] The tool holder is welded onto the tool turret, and the tool is installed inside the tool holder. When the tool is subjected to impact, the contact surface of the tool holder is subjected to alternating loads and deforms to varying degrees. This deformation will affect the tool installation accuracy and pose a hidden danger. The deformation needs to be repaired, which will affect work efficiency and has a high repair cost. Utility Model Content

[0004] To address the shortcomings of existing technologies where deformation of the contact surface between the cutter holder and the cutter shaft requires time and cost for repair, this utility model proposes a cutter holder, cutter head, and tunnel boring machine (TBM) that can directly replace deformed cutter holders without repair. The solution is as follows:

[0005] On the one hand, this utility model proposes a cutter holder for a tunnel boring machine cutter, the cutter holder comprising two symmetrically arranged main bodies, with two parallel fixed side plates inserted between the two main bodies respectively;

[0006] The inner wall of the main body is provided with a sliding groove for the movement of the hob cutter shaft and a mounting groove for the wedge block to be inserted. The sliding groove and the mounting groove are connected. The hob cutter shaft is fastened in the sliding groove by the wedge block. The inner wall of the main body is also provided with a first mounting hole for bolt connection with the cutter head. The first mounting hole is located on the side wall of the area where the sliding groove and the mounting groove are connected.

[0007] Furthermore, the main body and the fixed side plate are respectively provided with matching grooves and protrusions.

[0008] Furthermore, the groove includes a first horizontal surface, a second horizontal surface, and a first inclined surface connecting the first horizontal surface and the second horizontal surface. The position of the first horizontal surface is higher than that of the second horizontal surface, and the length of the first horizontal surface is less than that of the second horizontal surface. The included angle between the first horizontal surface and the first inclined surface is adapted to the included angle between the two opposite inclined surfaces corresponding to the hob shaft.

[0009] Furthermore, the mounting groove includes a first vertical surface, a third horizontal surface, and a second vertical surface connected in sequence. The first vertical surface is connected to the second horizontal surface, and the third horizontal surface is positioned lower than the first vertical surface. The third horizontal surface and the second vertical surface are adapted to the wedge block. The third horizontal surface has a second mounting hole in its longitudinal direction for connecting to the wedge block by bolts.

[0010] Furthermore, a rubber pad is provided between the third transverse surface and the wedge block, and the rubber pad is detachably connected to the wedge block or the third transverse surface.

[0011] On the other hand, this utility model proposes a cutterhead for a tunnel boring machine, including a cutterhead body and the aforementioned cutter holder. The cutter holder is connected to the cutterhead body by bolts. The cutterhead also includes a roller cutter movably installed in the cutter holder and a wedge block installed in the cutter holder by bolts. The wedge block is used to fasten the roller cutter shaft in the groove of the cutter holder. The roller cutter shaft is configured as an irregularly shaped cutter shaft.

[0012] Furthermore, this utility model proposes a tunnel boring machine, characterized in that it includes the aforementioned cutterhead.

[0013] Compared with the prior art, the advantages of this utility model are as follows:

[0014] This utility model embodiment sets the tool holder to include two symmetrically arranged main bodies, with two parallel fixed side plates inserted between the two main bodies. The main bodies are detachably installed to the cutter head by screws. When the main body is deformed at the contact point with the hob shaft, it is convenient to replace the main body. Moreover, the fixed side plates and the main bodies adopt a tight-fitting plug-in connection method, which can be matched with different models of fixed side plates. Different cutters can be installed between the main bodies, thereby improving the flexibility and applicability of the cutters.

[0015] This utility model embodiment, by setting a sliding groove, allows the irregular cutter shaft of the hob to slide smoothly into the groove. The hob can be fixed by using bolts and wedge blocks. Similarly, when disassembling the hob, the hob can be removed by removing the wedge blocks. This tool is easy to operate, improves the replacement efficiency to a certain extent, and reduces labor intensity. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the tool holder structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the main structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the wedge-shaped block structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the single-edged hob structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the tool holder structure after mounting the hob and wedge block according to this utility model. Figure 1 ;

[0021] Figure 6 This is a cross-sectional schematic diagram of the tool holder structure after mounting the hob and wedge block according to this utility model;

[0022] Figure 7 This is a schematic diagram of the double-edged hob structure of this utility model;

[0023] Figure 8 This is a schematic diagram of the tool holder structure after mounting the hob and wedge block according to this utility model. Figure 2 ;

[0024] In the above figures: 1. Main body; 11. Mounting groove; 111. First vertical surface; 112. Third horizontal surface; 113. Second vertical surface; 12. Second mounting hole; 13. Groove; 14. First mounting hole; 15. Slide groove; 151. First horizontal surface; 152. Second horizontal surface; 153. First inclined surface; 2. Fixed side plate; 21. Protrusion structure; 3. Hob; 31. Irregular cutter shaft; 32. Cutter head; 4. Wedge block; 41. Third mounting hole; 5. Bolt; 6. Rubber pad. Detailed Implementation

[0025] To facilitate understanding of this utility model by those skilled in the art, the specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0026] like Figures 1-8 This utility model proposes a cutter holder for a tunnel boring machine (TBM) cutter, comprising two main bodies 1 and two fixed side plates 2. The two main bodies 1 are symmetrically arranged, and the fixed side plates 2 are tightly fitted and connected between the two main bodies 1. The inner wall of each main body 1 has a sliding groove 15 for the movement of the cutter shaft of a roller cutter 3 and an installation groove 11 for the insertion of a wedge block 4. The sliding groove 15 and the installation groove 11 are connected. The cutter shaft of the roller cutter 3 is fastened to the sliding groove 15 by the wedge block 4. The inner wall of each main body 1 also has a first installation hole 14 for connection with the cutterhead bolt 5. The first installation hole 14 is located on the side wall of the area connecting the sliding groove 15 and the installation groove 11. The main body 1 is detachably installed to the cutterhead by bolts 5, facilitating replacement of the main body 1 when deformation occurs at the contact point between the main body 1 and the cutter shaft of the roller cutter 3. The fixed side plates 2 are tightly fitted and connected between the two main bodies 1. By using fixed side plates 22 of different widths, cutters of different sizes can be installed between the main bodies 1, thereby improving the flexibility and applicability of cutter selection.

[0027] like Figure 2 As shown, the main body 1 has a plate-like structure of a certain thickness, with a sliding groove 15 and a mounting groove 11 of a certain thickness formed on the inner side wall. The sliding groove 15 is approximately a U-shaped groove that rotates 90 degrees clockwise. Specifically, as shown... Figure 6As shown, the slide groove 15 includes a first horizontal surface 151, a second horizontal surface 152, and a first inclined surface 153 connecting the first horizontal surface 151 and the second horizontal surface 152. The first horizontal surface 151 is positioned higher than the second horizontal surface 152, and the length of the first horizontal surface 151 is less than the length of the second horizontal surface 152. The included angle between the first horizontal surface 151 and the first inclined surface 153 matches the included angle between the two opposing inclined surfaces corresponding to the cutter shaft of the hob 3. The mounting groove 11 is approximately a U-shaped groove. Specifically, as shown... Figure 6 As shown, the mounting groove 11 includes a first vertical surface 111, a third horizontal surface 112, and a second vertical surface 113 connected in sequence. The first vertical surface 111 is perpendicularly connected to the second horizontal surface 112. The third horizontal surface 112 is positioned lower than the first vertical surface 111. The third horizontal surface 112 and the second vertical surface 113 are adapted to the wedge block 4. The third horizontal surface 112 has a second mounting hole 12 in its longitudinal direction for connecting with the wedge block 4 by bolts 5.

[0028] To reduce vibration, a rubber pad 6 is provided between the wedge block 4 and the main body 1. The rubber pad 6 can be installed on the third horizontal surface 112 by bolts 5 (illustrated in this embodiment), or it can be installed on the bottom surface of the wedge block 4 by bolts 5.

[0029] The main body 1 and the fixed side plate 2 are respectively provided with matching grooves 13 and protrusion structures 21. In this embodiment, the grooves 13 are formed on the side wall of the main body 1, and the protrusion structures 21 are provided at both ends of the fixed side plate 2. To provide damping between the main body 1 and the fixed side plate 2, the main body 1 and the fixed side plate 2 are connected by a tight-fitting plug-in method. During installation, a tool is used to press the fixed side plate 2 into the groove 13 of the main body 1, and a tool is used to separate the fixed side plate 2 from the main body 1 during disassembly. The fixed side plate 2 is provided with various specifications and sizes, and its specifications can be reasonably adjusted according to the parallel distance between the two main bodies 1. In actual use, it is only necessary to adjust the position of the two main bodies 1. Figure 5 , 8 The distance d indicated in the figure is used to make the guide grooves parallel. Then, the two ends of the fixed side plate 2 are inserted into the guide grooves to complete the connection between the fixed side plate 2 and the main body 1.

[0030] like Figure 4 As shown, the hob 3 includes an irregular cutter shaft 31 and a cutter head 32. The irregular cutter shaft 31 is symmetrically arranged at both ends of the cutter head 32. The cutter head 32 is uniformly provided with a ring of high-strength alloy particles to improve the wear resistance of the cutter head 32, thereby increasing the service life of the hob 3.

[0031] The hobbing cutter 3 uses an irregular cutter shaft 31. The irregular cutter shaft 31 has some oblique cut surfaces and the other surfaces are arc surfaces, specifically three oblique cut surfaces and two arc surfaces. Compared with a cylindrical cutter shaft, it can increase the contact area with the slide groove 15 and the wedge block 4, and can also prevent the cutter shaft from slipping intermittently. The first horizontal surface 151 and the first oblique surface 153 of the slide groove 15 are adapted to the two oblique cut surfaces of the irregular cutter shaft 31. The slide groove 15 and the irregular cutter shaft 31 can increase stability. At the same time, the oblique surface of the wedge block 4 is adapted to the other oblique cut surface of the irregular cutter shaft 31, so that the wedge block 4 abuts against the irregular cutter shaft 31 and limits it within the slide groove 15, preventing the irregular cutter shaft 31 from shaking or rotating during construction.

[0032] When installing the hob 3, place the irregular fixed shaft of the hob 3 into the slide groove 15. Since the slide groove 15 is connected to the limiting groove and the top of the limiting groove is open, the irregular cutter shafts 31 at both ends of the hob 3 can be pushed into the slide groove 15 with very little effort when installing the hob 3. Then, use the wedge block 4 with the screw to fix it, thus completing the installation of the cutter. Similarly, when it is necessary to disassemble the hob 3, simply unscrew the screw and remove the wedge block 4 to complete the disassembly or replacement of the hob 3.

[0033] Specifically, such as Figure 4 , 7 As shown, the hob 3 can be a single-edged hob 3, a double-edged hob 3, or a multi-edged hob 3 (not shown in the figure). The cutter head 32 is equipped with a bearing, which can make the cutter head 32 rotate after the irregular cutter shaft 31 is fixed.

[0034] The wedge block 4 has a third mounting hole 41, which is a through hole. The second mounting hole 12 is a threaded hole. When the wedge block 4 is installed, the bolt 5 passes through the third mounting hole 41 and is locked in the second mounting hole 12, thereby achieving a fixed connection between the wedge block 4 and the main body 1.

[0035] Working principle of this utility model:

[0036] When using this cutting tool, the user first fixes the main body 1 to the cutter head with screws, then tightly inserts the fixed side plate 2 to improve its stability. Then, select the appropriate cutting tool and install the hob 3 between the two main bodies 1. Depending on the construction needs, the user can flexibly select a single-edged hob 3, a double-edged hob 3, or a multi-edged hob 3. To install the hob 3, place the irregular fixed shaft of the hob 3 into the slide groove 15 and fix it with the wedge block 4. This completes the installation of the cutting tool. When it is necessary to disassemble the hob 3, simply unscrew the bolt 5 and remove the wedge block 4 to disassemble or replace the hob 3. If deformation is found at the connection between the main body 1 and the hob 3, first disassemble the hob 3 according to the above operation, then unscrew the screws to remove the main body 1 from the cutter head, remove the fixed side plate 2 connected to the main body 1, and replace it with a new main body 1.

[0037] Based on the aforementioned cutter holder, this utility model also proposes a cutterhead for a tunnel boring machine, including a cutterhead body 1 and the aforementioned cutter holder. The cutter holder is connected to the cutterhead body 1 by bolts 5. The cutterhead also includes a roller cutter 3 movably installed in the cutter holder and a wedge block 4 installed in the cutter holder by bolts 5. The wedge block 4 is used to fasten the cutter shaft of the roller cutter 3 in the sliding groove 15 of the cutter holder. The cutter shaft of the roller cutter 3 is configured as an irregularly shaped cutter shaft 31.

[0038] Based on the aforementioned cutterhead, this utility model also proposes a tunnel boring machine, including the aforementioned cutterhead.

[0039] The embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A cutter holder for a tunnel boring machine cutter, characterized in that, The tool holder includes two symmetrically arranged main bodies (1), and two parallel fixed side plates (2) are tightly fitted between the two main bodies (1). The inner wall of the main body (1) is provided with a sliding groove (15) for the movement of the cutter shaft of the hob (3) and an installation groove (11) for the wedge block (4) to be inserted. The sliding groove (15) and the installation groove (11) are connected. The cutter shaft of the hob (3) is fastened in the sliding groove (15) by the wedge block (4). The inner wall of the main body (1) is also provided with a first installation hole (14) for connection with the cutter head bolt (5). The first installation hole (14) is located on the side wall of the area where the sliding groove (15) and the installation groove (11) are connected.

2. The cutter holder for a tunnel boring machine cutter according to claim 1, characterized in that, The main body (1) and the fixed side plate (2) are respectively provided with matching grooves (13) and protrusion structures (21).

3. The cutter holder for a tunnel boring machine cutter according to claim 1, characterized in that, The groove (15) includes a first horizontal surface (151), a second horizontal surface (152), and a first inclined surface (153) connecting the first horizontal surface (151) and the second horizontal surface (152). The position of the first horizontal surface (151) is higher than that of the second horizontal surface (152), and the length of the first horizontal surface (151) is less than that of the second horizontal surface (152). The included angle between the first horizontal surface (151) and the first inclined surface (153) is adapted to the included angle between the two opposite inclined surfaces corresponding to the cutter shaft of the hob (3).

4. The cutter holder for a tunnel boring machine cutter according to claim 3, characterized in that, The mounting groove (11) includes a first vertical surface (111), a third horizontal surface (112), and a second vertical surface (113) connected in sequence. The first vertical surface (111) is perpendicularly connected to the second horizontal surface (152). The third horizontal surface (112) is positioned lower than the first vertical surface (111). The third horizontal surface (112) and the second vertical surface (113) are adapted to the wedge block (4). The third horizontal surface (112) has a second mounting hole (12) in the longitudinal direction for connecting with the wedge block (4) by bolts (5).

5. A cutter holder for a tunnel boring machine cutter according to claim 4, characterized in that, A rubber pad (6) is provided between the third horizontal surface (112) and the wedge block (4), and the rubber pad (6) is detachably connected to the wedge block (4) or the third horizontal surface (112).

6. A cutterhead for a tunnel boring machine, characterized in that, The tool holder includes a tool head body (1) and a tool holder as described in any one of claims 1 to 5. The tool holder is connected to the tool head body (1) by bolts (5). The tool head also includes a hob (3) movably mounted in the tool holder and a wedge block (4) mounted in the tool holder by bolts (5). The wedge block (4) is used to fasten the hob (3) cutter shaft in the groove (15) of the tool holder. The hob (3) cutter shaft is set as an irregular cutter shaft (31).

7. A tunnel boring machine, characterized in that, Includes the cutter head as described in claim 6.

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