A petal-shaped rock-breaking cutter head and tunnel boring machine

Abstract

The present application proposes a petal-shaped rock breaking cutter disc, comprising a cutter disc panel, a central cutter assembly and a plurality of side cutting assemblies, wherein the central cutter assembly is arranged in the middle of the cutter disc panel, and the plurality of side cutting assemblies are arranged around the central cutter assembly, the side cutting assemblies are hinged on the cutter disc panel, and the plurality of side cutting assemblies are respectively connected to drive assemblies to drive the plurality of side cutting assemblies to rotate toward or away from the central cutter assembly at one end close to the central cutter assembly through the drive assemblies. The cutter disc is provided with a central cutter assembly in the middle, and then a plurality of side cutting assemblies are hingedly arranged around the central cutter assembly. The drive assemblies can drive the side cutting assemblies to rotate so that the plurality of side cutting assemblies are surrounded into different shapes, thereby having a higher excavation efficiency when excavating rock walls of different hardness.

Description

Technical Field

[0001] The present application relates to the technical field of tunnel boring machines, and in particular to a petal-shaped rock-breaking cutter disc and a tunnel boring machine. Background Art

[0002] The roadheader is a comprehensive equipment that uses mechanical rock crushing, mucking and support to perform continuous operations. It is widely used in hydropower, railway and subway tunnel projects. At present, the cantilever roadheader uses pick cutters and disc cutters for excavation. The cutterhead has a fixed structure and is suitable for rock walls of a specific hardness. When the hardness of the rock wall changes, other cutterheads need to be replaced for construction, otherwise the excavation efficiency will be extremely low. Summary of the invention

[0003] The present application aims to solve one of the technical problems in the related art at least to some extent.

[0004] To this end, the purpose of the present application is to propose a petal-shaped rock breaking cutter disc, which has a central cutter assembly in the middle and then a plurality of side cutting assemblies hingedly arranged on the circumference of the central cutter assembly. The side cutting assemblies can be driven to rotate by a driving assembly so that the plurality of side cutting assemblies are arranged into different shapes, thereby achieving higher excavation efficiency when adapting to excavation of rock walls of different hardness.

[0005] In order to achieve the above-mentioned purpose, the present application proposes a petal-shaped rock breaking cutter disc, comprising:

[0006] Knife head panel;

[0007] A central hob assembly, wherein the central hob assembly is arranged in the middle of the cutter head panel;

[0008] A plurality of side cutting assemblies are arranged around the central cutter assembly, the side cutting assemblies are hinged on the cutter disc panel, and the plurality of side cutting assemblies are respectively connected to drive assemblies so as to drive the ends of the plurality of side cutting assemblies close to the central cutter assembly to rotate toward or away from the central cutter assembly through the drive assemblies.

[0009] Furthermore, the side cutting assembly comprises:

[0010] A first side cutting member, a support member is provided in the middle of the cutter head panel, one end of the first side cutting member close to the central hob assembly is hinged on the support member, and the other end is connected to the drive assembly;

[0011] A second side cutting member, wherein one end of the second side cutting member away from the central hob assembly is hinged on the cutter disc panel, and the other end is connected to the driving assembly.

[0012] Furthermore, one second side cutting piece is disposed between two adjacent first side cutting pieces.

[0013] Furthermore, the central hob assembly comprises:

[0014] A central fixing plate, wherein the central fixing plate is arranged on the supporting member;

[0015] A plurality of center hobs are installed in parallel on the center fixing plate.

[0016] Furthermore, the first side cutting member comprises:

[0017] A first side fixing plate, one end of which is hinged on the support member and the other end of which is connected to the driving assembly;

[0018] A first pick group, the first pick group is arranged on the first side fixing plate close to the central hob assembly;

[0019] A first side roller is arranged on a side of the first side fixing plate away from the central roller assembly.

[0020] Furthermore, the first pick group includes a plurality of first picks, and the plurality of first picks are arranged on the first side fixing plate close to the central hob assembly.

[0021] Further, the second side cutting member comprises a second side fixing plate, one end of the second side fixing plate is hinged to the cutter head panel, and the other end is connected to the driving assembly;

[0022] A plurality of second side cutters are arranged on the second side fixing plate, and a second pick set is arranged between two adjacent second side cutters.

[0023] Further, the second pick group includes a plurality of second picks arranged in parallel;

[0024] The second side cutter is first arranged on the second side fixing plate starting from the side close to the central cutter assembly.

[0025] Furthermore, the driving assembly comprises:

[0026] a first telescopic oil cylinder, wherein the cylinder bottom of the first telescopic oil cylinder is hinged on the cutter head panel, and the first side fixing plate in each of the first side cutting members is respectively connected to a power output end of the first telescopic oil cylinder;

[0027] A second telescopic oil cylinder, wherein the bottom of the second telescopic oil cylinder is hinged on the cutter head panel, and the second side fixing plate in each of the second side cutting members is respectively connected to a power output end of the second telescopic oil cylinder.

[0028] A tunnel boring machine comprises a petal-shaped rock-breaking cutter disc.

[0029] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0031] Figure 1 It is a structural schematic diagram of a petal-shaped rock-breaking cutter disc proposed in an embodiment of the present application, in which a plurality of side cutting components form a conical structure to cut hard rock;

[0032] Figure 2 This application Figure 1 The main view of

[0033] Figure 3 This application Figure 1 A top view of

[0034] Figure 4 It is a schematic diagram of the structure when the second side cutting member of the present application is raised near one end of the central hob assembly;

[0035] Figure 5 This application Figure 4 Side view of.

[0036] In the figure, 1. cutter disc panel; 2. center hob assembly; 21. center fixing plate; 22. center hob; 3. flange; 4. first side cutting member; 41. first side fixing plate; 42. first pick group; 43. first side hob; 44. first pick; 5. second side cutting member; 51. second side fixing plate; 52. second pick group; 53. second side hob; 54. second pick; 6. support member; 7. first telescopic cylinder; 8. second telescopic cylinder. DETAILED DESCRIPTION

[0037] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be construed as limiting the present application. On the contrary, the embodiments of the present application include all changes, modifications and equivalents that fall within the spirit and connotation of the appended claims.

[0038] Figure 1 It is a structural schematic diagram of a petal-shaped rock breaking cutter disc proposed in one embodiment of the present application.

[0039] Reference Figure 1-5 A petal-shaped rock breaking cutter disc comprises a cutter disc panel 1, a central cutter assembly 2 is arranged in the middle of the cutter disc panel 1, a plurality of side cutting assemblies are arranged on the cutter disc panel 1, the plurality of side cutting assemblies surround the central cutter assembly 2, the side cutting assemblies are hinged on the cutter disc panel 1, the plurality of side cutting assemblies are respectively connected with driving assemblies, so that the driving assemblies drive the ends of the plurality of side cutting assemblies close to the central cutter assembly 2 to rotate toward or away from the central cutter assembly 2, and the cutter disc panel 1 is externally connected to the tunnel boring machine through a flange 3, and the cutter disc is controlled to work by the tunnel boring machine, and the rotation of the side cutting assemblies can be adjusted by the driving assemblies to change the structural form surrounded by the plurality of side cutting assemblies to adapt to rock walls of different hardness, which can not only improve the tunneling efficiency, but also eliminate the need to replace the cutter disc for rocks of different hardness.

[0040] In detail, Figure 1-3 As shown, when excavating hard rock, the side cutting assembly is driven by the driving assembly so that the end of the side cutting assembly close to the center cutter assembly 2 rotates away from the center cutter assembly 2, that is, the end of the side cutting assembly close to the center cutter assembly 2 is raised relative to the cutter head panel 1, and the end away from the center cutter assembly 2 is lowered toward the cutter head panel 1, which is equivalent to the side cutting assemblies around the center cutter assembly 2 forming closed petals. At this time, the multiple side cutting assemblies around the center cutter assembly 2 form a conical structure. When excavating hard rock, the conical structure can reduce the working area between the cutter head and the rock, thereby improving the excavation efficiency of the cutter head in hard rock under the same thrust.

[0041] During the excavation process, when constructing in a soft rock area, the end of the side cutting assembly used for cutting close to the center cutter assembly 2 can be rotated toward the center cutter assembly 2, that is, the end of the side cutting assembly used for cutting close to the center cutter assembly 2 is lowered and the end away from the center cutter assembly 2 is raised, and the other part of the side cutting assembly used for suspension is lowered away from the center cutter assembly 2 and the end close to the center cutter assembly 2 is raised, and the side cutting assembly used for cutting and the side cutting assembly used for suspension are cross-arranged to form a cutting-suspending-cutting-suspending structure, at this time, the side cutting assemblies used for suspension are surrounded by The cutter head 2 is a cone-shaped cutter, and the side cutting components used for cutting form open petals, and the side cutting components for cutting form a panel shape. At this time, the center hob component 2 on the cutter head and the raised end of the side cutting component for cutting can both cut, so that the middle and sides of the cutter head can both be cut, thereby increasing the cutting area. In addition, due to the interval arrangement of the suspended side cutting components, the suspended side cutting components do not contact the rock wall, thereby reducing resistance, and forming a suspended cutting situation between the two cutting side cutting components, thereby increasing the cutting speed. When excavating soft rock, it can not only meet the soft rock cutting needs, but also increase the rock breaking area of ​​the cutter head, thereby improving the rock breaking efficiency of the cutter head.

[0042] In addition, when the hardness of the rock wall is slightly increased relative to the soft rock area, the rotation height of the side cutting assembly used for cutting can be controlled so that the end of the side cutting assembly used for cutting close to the center hob assembly 2 is slightly raised, and the end away from the center hob assembly 2 is slightly lowered. At this time, the end of the suspended side cutting assembly close to the center hob assembly 2 will partially contact the rock wall, thereby increasing the cutting site and thus improving the cutting efficiency.

[0043] It should be explained in detail that there are many situations in which the connection relationship between the side cutting assembly and the driving assembly and the structural arrangement of the side cutting assembly can achieve the cutting performance under different working conditions in the above-mentioned embodiments.

[0044] As a possible structure, the side cutting assembly may include a first side cutting piece 4 and a second side cutting piece 5. A support piece 6 is provided in the middle of the cutter disc panel 1. One end of the first side cutting piece 4 close to the central hob assembly 2 is hinged on the support piece 6, and the other end is connected to the driving assembly. When the driving assembly drives the end of the first side cutting piece 4 away from the central hob assembly 2 to move toward the side of the cutter disc panel 1, a conical structure is formed between the multiple first side cutting pieces 4. When the driving assembly drives the end of the first side cutting piece 4 away from the central hob assembly 2 to move toward the side away from the cutter disc panel 1, the multiple first side cutting pieces 4 open like petals, and the multiple first side cutting pieces 4 are spaced apart. A panel-shaped structure is formed. In addition, one end of the second side cutting piece 5 away from the central cutter assembly 2 is hinged on the cutter head panel 1, and the other end is connected to the driving assembly. When excavating a hard rock wall, the driving assembly controls the second side cutting piece 5 to rise at one end close to the central cutter assembly 2, so that a conical structure is formed between the multiple second side cutting pieces 5. At the same time, as described above, the driving mechanism controls the multiple first side cutting pieces 4 to form a conical structure, so that a conical structure is formed between the multiple second side cutting pieces 5 and the multiple first side cutting pieces 4. When cutting the rock wall, the conical structure can reduce the effective area between the cutter head and the rock, thereby improving the excavation efficiency of the cutter head in hard rock under the same thrust. When excavating on soft rock, the conical structure formed by the multiple second side cutting members 5 remains unchanged, and at the same time, the multiple first side cutting members 4 are controlled to open like petals. At this time, the multiple first side cutting members 4 can contact and cut with the rock wall, while the multiple second side cutting members 5 are inclined toward the cutter head panel 1 and do not contact with the rock wall, so that the position where the second side cutting members 5 are installed forms a suspended surface, and no cutting is performed, thereby reducing the force between the rock wall and the resistance on the cutter head panel 1, which increases the cutting efficiency. In addition, since the multiple first side cutting members 4 are open, the cutting surface between the multiple first side cutting members 4 and the rock wall is increased, thereby improving the excavation efficiency. When the hardness of the rock wall increases slightly, at this time, the conical structure formed by the multiple second side cutting members 5 remains unchanged, and at the same time, the multiple first side cutting members 4 are controlled to open like petals, but the degree of opening of the first side cutting members 4 is driven by the driving component, that is, compared with soft rock cutting, at this time, the driving component is controlled to drive the first side cutting member 4 away from the height of the end of the center roller cutter assembly 2 to move slightly toward the cutter disc panel 1, so that the inclination of the second side cutting member 5 to the cutter disc panel 1 is reduced, so that the part of the second side cutting member 5 close to the center roller cutter assembly 2 can contact the rock wall, and the part away from the center roller cutter assembly 2 cannot contact the rock wall to form a suspended surface. Since the first side cutting member 4 and the part of the second side cutting member 5 can contact and cut the rock wall, compared with the soft rock working condition, some cutting sites are increased, the cutting ability is improved, and then the excavation efficiency is improved, and then the opening degree of the first side cutting member 4 is controlled according to the increase in the hardness of the rock wall.

[0045] In some embodiments, in order to ensure that the first side cutting piece 4 can cut evenly when the second side cutting piece 5 is suspended in the air, a second side cutting piece 5 is arranged between two adjacent first side cutting pieces 4, so that when cutting under soft rock conditions, every two connected first side cutting pieces 4 are suspended in the air, which can ensure that the cutting force and the suspended surface are evenly distributed, which can not only improve the excavation efficiency but also ensure uniform excavation.

[0046] It should be noted that the structure of the center hob assembly 2 can be various.

[0047] As a possible structure, in order to ensure the excavation performance in the middle part, the center cutter assembly 2 may include a center fixing plate 21, which is arranged on the support member 6, and a plurality of center cutters 22 arranged in parallel are arranged on the center fixing plate 21, that is, a plurality of first mounting grooves are opened on the surface of the center fixing plate 21 along the length direction, and the first mounting grooves are arranged along the width direction of the center fixing plate 21, and the plurality of center cutters 22 are respectively installed in the plurality of first mounting grooves, and the center cutter 22 is a disc-shaped cutter. By arranging a plurality of disc-shaped cutters, the cutting performance of the center cutter assembly 2 can be improved.

[0048] In some embodiments, the first side cutting member 4 includes a first side fixing plate 41, one end of the first side fixing plate 41 is hinged on the support member 6, and the other end is connected to the driving component, and the driving component can drive the end of the first side fixing plate 41 away from the center cutter assembly 2 to move toward or away from the cutter disc panel 1. At the same time, a first cutting tooth group 42 is provided on the side of the first side fixing plate 41 close to the center cutter assembly 2, and a first side cutter 43 is provided on the side of the first side fixing plate 41 away from the center cutter assembly 2. The first side cutter 43 is a disc-shaped cutter, and the first cutting tooth group 42 and the first side cutter 43 cooperate to jointly break rock, which has a good rock breaking effect on both hard rock and soft rock, thereby improving the rock breaking efficiency.

[0049] It should be noted that the first pick group 42 may include a plurality of first picks 44, and the plurality of first picks 44 are arranged on the first side fixing plate 41 close to the side of the center cutter assembly 2. Through the arrangement of the plurality of first picks 44 and the first side cutter 43, when excavating soft rock, the excavation efficiency can be improved through the joint action of the plurality of first picks 44 and the first side cutter 43 on the first side cutting piece 4.

[0050] In detail, a second mounting groove can be opened at one end of the first side fixing plate 41 away from the center cutter assembly 2 in the length direction, and the first side cutter 43 can be installed in the second mounting groove. At the same time, a plurality of third mounting grooves can be opened at one end of the first side fixing plate 41 close to the center cutter assembly 2 in the length direction, and at least one first cutting tooth 44 can be installed side by side in each third mounting groove. For example, two third mounting grooves can be set, and a first cutting tooth 44 can be installed in the middle of the width direction of the first third mounting groove close to one end of the center cutter assembly 2, and two first cutting teeth 44 can be arranged side by side along the width direction in the other third mounting groove. The three first cutting teeth 44 cooperate with the first side cutter 43 to improve the excavation efficiency.

[0051] In some embodiments, the second side cutting member 5 includes a second side fixing plate 51, one end of the second side fixing plate 51 is hinged on the cutter head panel 1, and the other end is connected to the driving assembly, that is, the side of the second side fixing plate 51 close to the central roller assembly 2 moves toward the side away from the cutter head panel 1 under the action of the driving assembly, so that the angle between the second side fixing plate 51 and the cutter head panel 1 changes, and a plurality of second side rollers 53 are arranged on the second side fixing plate 51, and the second side rollers 53 are disc-shaped rollers, and two adjacent second side rollers A second pick group 52 is arranged between the cutters 53. The strong cutting action of the second side cutter 53 can enable the second side cutting piece 5 to cut the rock wall with higher strength. At the same time, the second pick group 52 arranged between the two second side cutters 53 can not only assist in rock breaking, but also because the second pick group 52 has less contact with the rock wall than the second side cutter 53, the resistance is reduced, thereby improving the construction efficiency of the second side cutting piece 5, thereby achieving not only the ability to excavate harder rocks, but also the effect of higher excavation efficiency.

[0052] In addition, the second pick group 52 includes a plurality of second picks 54 arranged in parallel. The arrangement of the plurality of second picks 54 can improve the cutting position and enhance the excavation performance of the second side cutting member 5. In addition, the second side cutter 53 is the first arranged on the second side fixing plate 51 starting from the side close to the center cutter assembly 2. That is to say, a plurality of fourth mounting grooves are arranged in parallel on the surface of the second side fixing plate 51 along the length direction. The second side cutter 53 is installed in the first fourth mounting groove close to one end of the center cutter assembly 2, and then the second pick group 52 is installed in the second fourth mounting groove. The second side cutter 53 is installed in the third fourth mounting groove, and so on. The alternating arrangement between the second side cutter 53 and the second pick group 52 is realized, and the plurality of second picks 54 are arranged in parallel in the fourth mounting groove along the width direction of the second side fixing plate 51.

[0053] In the above embodiment, by controlling the configuration of the first side cutting member 4 and the second side cutting member 5, it is possible to adapt to working conditions with different rock wall hardness, as follows:

[0054] During the hard rock excavation construction process, a conical structure is formed between the multiple first side cutting members 4 and the multiple second side cutting members 5, and the end of the second side cutting member 5 close to the center cutter assembly 2 is the second side cutter 53, and the end of the first side cutting member 4 close to the center cutter assembly 2 is the first pick tooth group 42, and the second side cutter 53 and the first pick tooth group 42 are located in the circumferential direction at the same height of the conical surface of the conical structure, so that one end of the multiple side cutting assemblies close to the center cutter assembly 2 is a structure in which the second side cutters 53 and the first pick tooth group 42 are alternately arranged. The alternating arrangement of the second side cutters 53 and the first pick tooth group 42 can reduce the excavation resistance and improve the excavation efficiency. In hard rock cutting, the second side cutter 53 can achieve rapid hard rock excavation, and the first pick tooth group 42 plays a role in auxiliary excavation.

[0055] During the soft rock excavation process, since the multiple second side cutting members 5 are all suspended and do not contact the rock wall, at this time, excavation is only performed through the multiple first side cutting members 4 and the center cutter assembly 2. Since the multiple first side cutting members 4 are away from the center cutter assembly 2 and one end is away from the cutter head panel 1, the multiple first side cutting members 4 form a panel-shaped structure. At this time, there are multiple center cutters 22 at the center of the cutter head, and the side of the cutter head is surrounded by multiple first side cutters 43, and there are multiple first cutting teeth 44 between the side and the center. Therefore, when the cutter disc is pushed forward for excavation, the cutter disc structure used for excavation is a center cutter 22, a plurality of first cutting teeth 44 and a first side cutter 43, and the center cutter 22 and the first side cutter 43 are separated by the first cutting teeth 44, and the main cutting is performed by the center cutter 22 and the first side cutter 43, while the first cutting teeth 44 perform auxiliary cutting, thereby reducing the resistance during the excavation process and thereby improving the excavation efficiency, and there is a suspended surface between two adjacent first side cutting pieces 4, which further reduces the resistance and improves the excavation efficiency.

[0056] When the hardness of the rock wall increases relative to the soft rock working condition, the angle between the first side cutting member 4 and the cutter head panel 1 can be adjusted in the above embodiment, so that the end of the second side cutting member 5 close to the center cutter assembly 2 is exposed and can be connected to the rock wall. At this time, the cutter head structure used for excavation includes the center cutter 22, a plurality of first cutting teeth 44 and a first side cutter 43 on the first side cutting member 4, a second side cutter 53 close to the center cutter assembly 2 on the second side cutting member 5, and an adjacent second cutting tooth group 52. At this time, the first cutting teeth 44 and the second side cutter 53 are arranged around the circumference of the center cutter 22. 3. Although only the first cutting teeth 44 are arranged around the circumference of the central cutter 22 during soft rock excavation, and the first cutting teeth 44 are suspended between them, the cutting action of the second side cutters 53 between the first cutting teeth 44 can adapt to the increase in rock wall hardness and improve the excavation performance. In addition, since the first cutting teeth 44 and the second side cutters 53 are arranged alternately, the resistance will not be increased too much during rotary excavation, and the excavation efficiency will not be greatly affected. In addition, the space between two adjacent first side cutters 43 on the side of the cutter head panel is still a suspended structure, which does not affect the excavation efficiency.

[0057] When the hardness of the rock wall continues to increase and becomes medium-soft rock, it is necessary to increase the number of side cutters to achieve a certain excavation performance. By adjusting the first side cutting piece 4, the end of the first side cutting piece 4 away from the center cutter assembly 2 is brought close to the cutter head panel 1, so that a conical structure is formed between the multiple first side cutting pieces 4. In addition, the second side cutting piece 5 is controlled to rise at the end close to the center cutter assembly 2. At this time, the first pick group 42 on the first side cutting piece 4 does not connect with the rock wall, so that there is a suspended surface between the ends of two adjacent second side cutting pieces 5 close to the center cutter assembly 2, which reduces the resistance during cutting and improves the excavation efficiency. In addition, since the multiple second side cutters 53 alternately arranged on the second side cutting piece 5 are alternately arranged for excavation, they can adapt to harder rock walls. In addition, by controlling the distance between the end of the first side cutting piece 4 away from the center cutter assembly 2 and the cutter head panel 1, the first side cutter 43 at the end of the first side cutting piece 4 away from the center cutter assembly 2 is exposed and can connect with the rock wall. To achieve excavation of the first side cutter 43, the first side cutters 43 on the circumference of the cutter head panel 1 and the first side cutters 43 and the second pick tooth group 52 on the second side cutting member 5 are used to increase the number of side cutters used, so that rapid excavation of soft rock can be achieved. In addition, it should be noted that when the first side cutters 43 on the circumference of the cutter head panel 1 can contact the rock wall, the second side cutting member 5 between two adjacent first side cutters 43 in a circle corresponds to the second pick tooth group 52, and the second pick tooth group 52 implements auxiliary excavation, so that when multiple first side cutters 43 in a circle are rotating and cutting, the resistance is reduced due to the interval of the second pick tooth group 52, thereby improving the excavation efficiency. If the second side cutter 53 corresponds to the space between two first side cutters 43 in this circle, the excavation efficiency will be affected. In addition, since the first side cutters 43 and the second side cutting member 5 on the circumference of the cutter head can both achieve cutting in this state, the cutting area is increased, thereby improving the excavation efficiency.

[0058] In some embodiments, it is necessary to explain in detail that there are various structures that can drive one end of the first side cutting member 4 and the second side cutting member 5 to rise and fall and rotate.

[0059] As a possible structure, the driving assembly includes a first telescopic cylinder 7 and a second telescopic cylinder 8, the cylinder bottom of the first telescopic cylinder 7 is hinged on the cutter disc panel 1, and the first side fixing plate 41 in each first side cutting piece 4 is respectively connected to the power output end of a first telescopic cylinder 7, and the first telescopic cylinder 7 controls one end of the first side fixing plate 41 to move up and down to achieve rotation. In addition, the cylinder bottom of the second telescopic cylinder 8 is hinged on the cutter disc panel 1, and the second side fixing plate 51 in each second side cutting piece 5 is respectively connected to the power output end of a second telescopic cylinder 8, and the second telescopic cylinder 8 controls one end of the second side fixing plate 51 to move up and down to achieve rotation.

[0060] In some embodiments, a tunnel boring machine includes the petal-shaped rock breaking cutter disc described in the above embodiments.

[0061] It should be noted that, in the description of this application, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "plurality" is two or more.

[0062] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0063] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0064] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A petal-shaped rock breaking cutter disc, characterized in that: include: Knife head panel; A central hob assembly, wherein the central hob assembly is arranged in the middle of the cutter head panel; A plurality of side cutting assemblies, which are arranged around the central cutter assembly, are hinged on the cutter head panel, and are respectively connected to drive assemblies to drive the ends of the side cutting assemblies close to the central cutter assembly to rotate toward or away from the central cutter assembly through the drive assemblies; Wherein, the side cutting assembly includes: a first side cutting piece and a second side cutting piece, a support piece is arranged in the middle of the cutter disc panel, one end of the first side cutting piece close to the central hob assembly is hinged on the support piece, and the other end is connected to the drive assembly, and one end of the second side cutting piece away from the central hob assembly is hinged on the cutter disc panel, and the other end is connected to the drive assembly.

2. The petal-shaped rock breaking cutter disc according to claim 1, characterized in that: One second side cutting piece is disposed between two adjacent first side cutting pieces.

3. The petal-shaped rock breaking cutter disc according to claim 1, characterized in that: The center hob assembly comprises: A central fixing plate, wherein the central fixing plate is arranged on the supporting member; A plurality of center hobs are installed in parallel on the center fixing plate.

4. The petal-shaped rock breaking cutter disc according to any one of claims 1 or 2, characterized in that: The first side cutting member comprises: A first side fixing plate, one end of which is hinged on the support member and the other end of which is connected to the driving assembly; A first pick group, the first pick group is arranged on the first side fixing plate close to the central hob assembly; A first side roller is arranged on a side of the first side fixing plate away from the central roller assembly.

5. The petal-shaped rock breaking cutter disc according to claim 4, characterized in that: The first pick group includes a plurality of first picks, and the plurality of first picks are arranged on the first side fixing plate close to the central hob assembly.

6. The petal-shaped rock breaking cutter disc according to claim 4, characterized in that: The second side cutting member comprises a second side fixing plate, one end of the second side fixing plate is hinged on the cutter head panel, and the other end is connected to the driving assembly; A plurality of second side cutters are arranged on the second side fixing plate, and a second pick set is arranged between two adjacent second side cutters.

7. The petal-shaped rock breaking cutter disc as claimed in claim 6, characterized in that: The second pick group includes a plurality of second picks arranged in parallel; The second side cutter is first arranged on the second side fixing plate starting from the side close to the central cutter assembly.

8. The petal-shaped rock breaking cutter disc according to claim 6, characterized in that: The drive assembly comprises: a first telescopic oil cylinder, wherein the cylinder bottom of the first telescopic oil cylinder is hinged on the cutter head panel, and the first side fixing plate in each of the first side cutting members is respectively connected to a power output end of the first telescopic oil cylinder; A second telescopic oil cylinder, wherein the bottom of the second telescopic oil cylinder is hinged on the cutter head panel, and the second side fixing plate in each of the second side cutting members is respectively connected to a power output end of the second telescopic oil cylinder.

9. A tunnel boring machine comprising the petal-shaped rock breaking cutter disc as claimed in any one of claims 1 to 8.

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