Cutter head of pipe-jacking tunneling machine

Abstract

The utility model discloses a pipe-jacking tunneling machine cutterhead which comprises a support and a tunneling assembly, the tunneling assembly comprises a main spoke arm set and a secondary spoke arm set, and the main spoke arm set and the secondary spoke arm set are both installed on one side of the support; the support is provided with a first annular beam and a second annular beam, the first annular beam and the second annular beam are arranged on one side of the support, and the first annular beam is arranged on the outer side of the second annular beam in a sleeving mode; the main spoke arm group is mounted on the first annular beam; and the secondary spoke arm group is mounted between the first annular beam and the second annular beam. According to the cutter head of the pipe-jacking heading machine, one side, provided with the main spoke arm group and the secondary spoke arm group, of the support is arranged towards the heading direction, and the other side of the support is connected to the heading machine main body, so that the heading machine main body drives the main spoke arm group and the secondary spoke arm group to perform heading on a rock wall through the support.

Description

Technical Field

[0001] The utility model relates to the technical field of tunneling machines, in particular to a cutter head of a pipe jacking tunneling machine. Background Art

[0002] The cutter head of a pipe jacking tunneling machine is a key component of a pipe jacking tunneling machine (Tunnel Boring Machine, TBM) or a micro pipe jacking machine, and is used to cut and break formation materials such as soil and rock during tunneling. The cutter head is located at the front end of the tunneling machine, and through rotation and propulsion actions, it cuts the formation and forms the space for the tunnel or pipeline. The cutter head generally includes a disc-shaped cutter head body with openings and tool seats, usually a large disc made of high-strength steel or alloy steel, which can withstand high pressure and wear. However, multiple openings and tool seats are designed on the cutter head for installing various cutting tools and auxiliary devices; the cutting tools generally include hob cutters, scraping cutters, and ripping cutters to cut and break the formation such as soil and rock walls. According to the formation type, the cutter head generally includes an earth pressure balance cutter head, which is suitable for soft soil or clay formations and controls the tunneling pressure and slag discharge through an earth pressure balance system; a slurry shield cutter head, which is suitable for aquifers or loose formations and controls tunneling and slag discharge through a slurry circulation system; and a hard rock cutter head, which is suitable for hard rock formations and is equipped with high-strength hob cutters and scraping cutters.

[0003] The connection strength between the spoke arms and the support of the existing tunneling machine cutter head is insufficient. Specifically, there is a lack of a strengthening structure between adjacent spoke arms, resulting in insufficient overall structural strength of the cutter head. When the tunneling machine outputs torque from the support to the spoke arms, the insufficient structural strength of the cutter head will lead to a decrease in the overall output efficiency of the tunneling machine, and even cause the cutter head to crack and damage, which is not conducive to the continuous operation of the tunneling machine. Summary of the Utility Model

[0004] Based on this, in view of the technical problem of insufficient connection strength between the spoke arms and the support of the existing tunneling machine cutter head, it is necessary to provide a cutter head of a pipe jacking tunneling machine.

[0005] A cutter head of a pipe jacking tunneling machine, the cutter head of the pipe jacking tunneling machine includes a support and a tunneling assembly, wherein the tunneling assembly includes a main spoke arm group and a secondary spoke arm group, and both the main spoke arm group and the secondary spoke arm group are installed on one side of the support.

[0006] The support is provided with a first annular beam and a second annular beam. The first annular beam and the second annular beam are arranged on one side of the support, and the first annular beam is sleeved outside the second annular beam; the main spoke arm group is installed on the first annular beam; the secondary spoke arm group is installed between the first annular beam and the second annular beam.

[0007] In one embodiment, the above-mentioned first annular beam and second annular beam are nested in a manner that their geometric centers coincide.

[0008] In one embodiment, the above-mentioned support also includes a support body and a number of support columns. The support body is disposed on the side of the first annular beam and the second annular beam facing away from the tunneling assembly; the number of support columns are disposed between the first annular beam and the support body; both ends of each support column are respectively connected to the first annular beam and the support body.

[0009] In one embodiment, the above-mentioned number of support columns are arranged radially.

[0010] In one embodiment, the above-mentioned support body is configured as a circular structure with a diameter smaller than that of the first annular beam. Each support column extends radially outward from the side edge of the support body and is obliquely connected to the edge of the first annular beam.

[0011] In one embodiment, the above-mentioned main spoke group includes a first main spoke, a second main spoke, and a third main spoke. The first main spoke passes through the geometric center of the first annular beam and is erected on the side surfaces of the first annular beam and the second annular beam facing away from the support body; the second main spoke and the third main spoke are respectively erected on the surfaces of the first annular beam and the second annular beam on both sides of the first main spoke.

[0012] In one embodiment, the above-mentioned second main spoke is disposed on one side of the first main spoke and is erected on the side surfaces of the first annular beam and the second annular beam along the radial direction of the first annular beam; the third main spoke is disposed on the other side of the first main spoke relative to the second main spoke and is erected on the side surfaces of the first annular beam and the second annular beam along the radial direction of the first annular beam. That is, the second main spoke and the third main spoke are mirror-symmetrically disposed on both sides of the first main spoke.

[0013] In one embodiment, the above-mentioned first main spoke is provided with a number of center cutters, a number of first transition cutters, and two first outer peripheral cutters; the number of center cutters are disposed in the middle of the first main spoke; the two first outer peripheral cutters are disposed at both ends of the first main spoke; the number of first transition cutters are respectively disposed on both sides of the center cutters.

[0014] In one embodiment, the above-mentioned second main spoke is provided with a number of second transition cutters and second outer peripheral cutters. The second outer peripheral cutter is disposed at the distal end of the second main spoke relative to the first main spoke; the number of second transition cutters are disposed on the main body of the second main spoke.

[0015] In one embodiment, the above-mentioned third main spoke is provided with a number of third transition cutters and third outer peripheral cutters. The third outer peripheral cutter is disposed at the distal end of the third main spoke relative to the first main spoke; the number of third transition cutters are disposed on the main body of the third main spoke.

[0016] In one embodiment, the above-mentioned several third transition hob cutters and several second transition hob cutters are arranged in a non-mirror image manner, wherein the several third transition hob cutters are arranged at one end of the third main spoke arm connecting the first main spoke arm.

[0017] In one embodiment, the above-mentioned secondary spoke arm group includes a first secondary spoke arm, a second secondary spoke arm, a third secondary spoke arm, and a fourth secondary spoke arm. The first secondary spoke arm, the second secondary spoke arm, the third secondary spoke arm, and the fourth secondary spoke arm are respectively arranged at the fan-shaped area formed between the first main spoke arm, the second main spoke arm, and the third main spoke arm, and are respectively erected between the first annular beam and the second annular beam.

[0018] In one embodiment, the above-mentioned first secondary spoke arm, second secondary spoke arm, third secondary spoke arm, and fourth secondary spoke arm respectively extend along the radial direction of the first annular beam.

[0019] In one embodiment, the above-mentioned first secondary spoke arm is provided with several first tearing cutters and a fourth transition hob cutter. The fourth transition hob cutter is arranged at one end of the first secondary spoke arm connecting the first annular beam; the several first tearing cutters are arranged on the main body part of the first secondary spoke arm.

[0020] In one embodiment, the above-mentioned several first tearing cutters are arranged close to the second annular beam.

[0021] In one embodiment, the above-mentioned second secondary spoke arm is provided with several second tearing cutters and a fourth outer peripheral hob cutter. The fourth outer peripheral hob cutter is arranged at one end of the second secondary spoke arm connecting the first annular beam; the several second tearing cutters are arranged on the main body part of the second secondary spoke arm.

[0022] In one embodiment, the main body part of the above-mentioned third secondary spoke arm is provided with several third tearing cutters and a fifth transition hob cutter, wherein the several third tearing cutters are arranged close to the second annular beam.

[0023] In one embodiment, the above-mentioned fourth secondary spoke arm is provided with several fourth tearing cutters and a fifth outer peripheral hob cutter. The fifth outer peripheral hob cutter is arranged at one end of the fourth secondary spoke arm connecting the first annular beam; the several fourth tearing cutters are arranged on the main body part of the fourth secondary spoke arm.

[0024] In one embodiment, the above-mentioned first main spoke arm, second main spoke arm, third main spoke arm, first secondary spoke arm, second secondary spoke arm, third secondary spoke arm, and fourth secondary spoke arm are respectively provided with several scraping cutters and several cutting cutters.

[0025] For the cutter head of the pipe jacking machine of the present utility model, the side of the support where the main radial arm group and the secondary radial arm group are installed faces the tunneling direction, and the other side of the support is installed and connected to the main body of the tunneling machine. Thus, the main body of the tunneling machine drives the main radial arm group and the secondary radial arm group through the support to tunnel the rock wall. The support is provided with a first annular beam and a second annular beam. The first annular beam and the second annular beam cooperate to greatly strengthen the structural strength of the side of the support where the tunneling components are installed, thereby effectively improving the installation stability of the main radial arm group and the secondary radial arm group, and further improving the tunneling strength of the cutter head of the pipe jacking machine of the present utility model, while extending the service life and reducing the maintenance frequency. In addition, the first annular beam and the second annular beam are nested in a manner that their geometric centers coincide, so as to strengthen the central symmetry of the installation of the tunneling components, thereby improving the force uniformity of the tunneling components during operation, and further enhancing the balance and stability of the output of the tunneling components. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 FIG. is a schematic structural diagram of the cutter head of the pipe jacking machine in an embodiment;

[0027] Figure 2 FIG. is a schematic structural diagram of the cutter head of the pipe jacking machine in an embodiment;

[0028] Figure 3 FIG. is a schematic structural diagram of the cutter head of the pipe jacking machine in an embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following detailed description of the specific embodiments of the present utility model will be given with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0030] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0032] In the present utility model, unless otherwise clearly specified and defined, terms such as "installed", "connected", "joined", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0034] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it may be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0035] Please refer to Figures 1 to 3, the present utility model discloses a cutter head 10 of a pipe jacking machine. The cutter head 10 of the pipe jacking machine includes a support 100 and a tunneling assembly 200. Among them, the tunneling assembly 200 includes a main spoke arm group and a secondary spoke arm group. Both the main spoke arm group and the secondary spoke arm group are installed on one side of the support 100. In practical applications, the side of the support 100 where the main spoke arm group and the secondary spoke arm group are installed faces the tunneling direction, and the other side of the support 100 is installed and connected to the main body of the tunneling machine. Thus, the main body of the tunneling machine drives the main spoke arm group and the secondary spoke arm group through the support 100 to tunnel the rock wall. Specifically, the support 100 is provided with a first annular beam 110 and a second annular beam 120. The first annular beam 110 and the second annular beam 120 are arranged on one side of the support 100, and the first annular beam 110 is sleeved outside the second annular beam 120; the main spoke arm group is installed on the first annular beam 110 and extends from one side of the first annular beam 110 through the second annular beam 120 and the geometric center to the other side of the first annular beam 110; the secondary spoke arm group is installed between the first annular beam 110 and the second annular beam 120; thus, the first annular beam 110 and the second annular beam 120 together can greatly strengthen the structural strength of the side of the support 100 where the tunneling assembly 200 is installed, thereby effectively improving the installation stability of the main spoke arm group and the secondary spoke arm group, and further improving the tunneling strength of the cutter head 10 of the pipe jacking machine of the present utility model, while extending the service life and reducing the maintenance frequency. In this embodiment, the first annular beam 110 and the second annular beam 120 are nested in a manner that their geometric centers coincide, so as to strengthen the central symmetry of the installation of the tunneling assembly 200, thereby improving the force uniformity of the tunneling assembly 200 during operation, and further enhancing the balance and stability of the output of the tunneling assembly 200.

[0036] Furthermore, the support 100 is further provided with a support main body 130 and a plurality of support columns 140. The support main body 130 is arranged on the side of the first annular beam 110 and the second annular beam 120 facing away from the tunneling assembly 200; the plurality of support columns 140 are arranged between the first annular beam 110 and the support main body 130; both ends of each support column 140 are respectively connected to the first annular beam 110 and the support main body 130. Specifically, the plurality of support columns 140 are arranged radially; in this embodiment, the support main body 130 is arranged as a circular structure with a diameter smaller than that of the first annular beam 110, and each support column 140 extends radially outward from the side edge of the support main body 130 and is obliquely connected to the edge of the first annular beam 110. In practical applications, the cutter head 10 of the pipe jacking machine of the present utility model is installed on the corresponding tunneling machine main body through the support main body 130. Among them, the plurality of support columns 140 can effectively ensure the connection strength between the support main body 130 and the first annular beam 110, so that the torque output by the tunneling machine main body can be more effectively transmitted to the tunneling assembly 200, thereby strengthening the cutting and tunneling performance of the cutter head 10 of the pipe jacking machine.

[0037] Further, the main spoke arm group includes a first main spoke arm 210, a second main spoke arm 220, and a third main spoke arm 230. The first main spoke arm 210 passes through the geometric center of the first annular beam 110 and is installed on the surface of the first annular beam 110 and the second annular beam 120 facing away from the support body 130. The second main spoke arm 220 and the third main spoke arm 230 are respectively installed on the surfaces of the first annular beam 110 and the second annular beam 120 on both sides of the first main spoke arm 210. The first main spoke arm 210 cooperates with the second main spoke arm 220 and the third main spoke arm 230 to form the main structure of the tunneling assembly 200, and strengthens the overall connection strength of the main spoke arm group by passing through the first annular beam 110 and the second annular beam 120, thereby improving the actual tunneling performance and operation stability of the main spoke arm group. Specifically, the second main spoke arm 220 is arranged on one side of the first main spoke arm 210 and is installed on the surface of the first annular beam 110 and the second annular beam 120 along the radial direction of the first annular beam 110. The third main spoke arm 230 is arranged on the other side of the first main spoke arm 210 relative to the second main spoke arm 220 and is installed on the surface of the first annular beam 110 and the second annular beam 120 along the radial direction of the first annular beam 110. That is, the second main spoke arm 220 and the third main spoke arm 230 are mirror-symmetrically arranged on both sides of the first main spoke arm 210, thereby further improving the balance of the main spoke arm group during operation.

[0038] Further, the first main spoke arm 210 is provided with a plurality of center cutters 211, a plurality of first transition cutters 212, and two first outer peripheral cutters 213. The plurality of center cutters 211 are arranged in the middle of the first main spoke arm 210. The two first outer peripheral cutters 213 are arranged at both ends of the first main spoke arm 210. The plurality of first transition cutters 212 are respectively arranged on both sides of the center cutters 211, thereby ensuring the cutting performance of the first main spoke arm 210.

[0039] Further, the second main spoke arm 220 is provided with a plurality of second transition cutters 221 and a second outer peripheral cutter 222. The second outer peripheral cutter 222 is arranged at the distal end of the second main spoke arm 220 relative to the first main spoke arm 210. The plurality of second transition cutters 221 are arranged on the main body part of the second main spoke arm 220, thereby ensuring the cutting performance of the second main spoke arm 220.

[0040] Further, the third main spoke 230 is provided with a plurality of third transition cutters 231 and third peripheral cutters 232. The third peripheral cutters 232 are disposed at the distal end of the third main spoke 230 relative to the first main spoke 210; the plurality of third transition cutters 231 are disposed on the main body portion of the third main spoke 230, so as to ensure the cutting performance of the third main spoke 230. In this embodiment, the plurality of third transition cutters 231 and the plurality of second transition cutters 221 are arranged in a non-mirror image manner, wherein the plurality of third transition cutters 231 are disposed at one end of the third main spoke 230 connecting the first main spoke 210.

[0041] Further, the secondary spoke group includes a first secondary spoke 240, a second secondary spoke 250, a third secondary spoke 260, and a fourth secondary spoke 270. The first secondary spoke 240, the second secondary spoke 250, the third secondary spoke 260, and the fourth secondary spoke 270 are respectively disposed at the fan-shaped area formed between the first main spoke 210, the second main spoke 220, and the third main spoke 230, and are respectively mounted between the first annular beam 110 and the second annular beam 120, so as to make the most of the installation area formed by the first annular beam 110 and the second annular beam 120, and then further improve the cutting and tunneling performance of the tunneling assembly 200. Specifically, the first secondary spoke 240, the second secondary spoke 250, the third secondary spoke 260, and the fourth secondary spoke 270 are respectively arranged to extend radially along the first annular beam 110, so as to further improve the balance of the secondary spoke group during operation.

[0042] Further, the first secondary spoke 240 is provided with a plurality of first tearing cutters 241 and fourth transition cutters 242. The fourth transition cutters 242 are disposed at one end of the first secondary spoke 240 connecting the first annular beam 110; the plurality of first tearing cutters 241 are disposed on the main body portion of the first secondary spoke 240, so as to ensure the cutting performance of the first secondary spoke 240. In this embodiment, the plurality of first tearing cutters 241 are disposed close to the second annular beam 120.

[0043] Further, the second secondary spoke 250 is provided with a plurality of second tearing cutters 251 and fourth peripheral cutters 252. The fourth peripheral cutters 252 are disposed at one end of the second secondary spoke 250 connecting the first annular beam 110; the plurality of second tearing cutters 251 are disposed on the main body portion of the second secondary spoke 250, so as to ensure the cutting performance of the second secondary spoke 250.

[0044] Further, a plurality of third tearing cutters 261 and fifth transition cutters 262 are disposed on the main body portion of the third secondary spoke 260. Among them, the plurality of third tearing cutters 261 are disposed close to the second annular beam 120, so as to ensure the cutting performance of the third secondary spoke 260.

[0045] Furthermore, the fourth radial arm 270 is provided with a plurality of fourth tearing knives 271 and a fifth outer peripheral hob 272. The fifth outer peripheral hob 272 is arranged at one end of the fourth radial arm 270 connected to the first annular beam 110; the plurality of fourth tearing knives 271 are arranged on the main body of the fourth radial arm 270, so as to ensure the cutting performance of the fourth radial arm 270.

[0046] In this embodiment, with the plane where the first annular beam 110 is located as the reference plane, the setting angles of the central hob 211, the first transition hob 212, the second transition hob 221, the third transition hob 231 and the fifth transition hob 262 are all set to 90°; the setting angles of the first outer peripheral hob 213, the second outer peripheral hob 222, the third outer peripheral hob 232, the fourth outer peripheral hob 252 and the fifth outer peripheral hob 272 are set to 0-90°; among them, the setting angle of the fifth outer peripheral hob 272 is greater than the setting angles of the first outer peripheral hob 213, the second outer peripheral hob 222, the third outer peripheral hob 232 and the fourth outer peripheral hob 252. In practical applications, by misaligning the setting angles of the first outer peripheral hob 213, the second outer peripheral hob 222, the third outer peripheral hob 232, the fourth outer peripheral hob 252 and the fifth outer peripheral hob 272, the cutting range of the tunneling assembly 200 can be effectively expanded, so as to further improve the tunneling performance of the tunneling assembly 200.

[0047] Furthermore, the first main radial arm 210, the second main radial arm 220, the third main radial arm 230, the first secondary radial arm 240, the second secondary radial arm 250, the third secondary radial arm 260 and the fourth secondary radial arm 270 are respectively provided with a plurality of scraping knives a and a plurality of cutting knives b, so as to further improve the cutting performance of the tunneling assembly 200.

[0048] In summary, for the cutter head of the pipe jacking machine disclosed in the present utility model, the side of the support seat where the main radial arm group and the secondary radial arm group are installed faces the tunneling direction, and the other side of the support seat is installed and connected to the tunneling machine main body. Thus, the tunneling machine main body drives the main radial arm group and the secondary radial arm group through the support seat to tunnel the rock wall. The support seat is provided with a first annular beam and a second annular beam. The first annular beam and the second annular beam together can greatly strengthen the structural strength of the side of the support seat where the tunneling assembly is installed, so as to effectively improve the installation stability of the main radial arm group and the secondary radial arm group, and further improve the tunneling strength of the cutter head of the pipe jacking machine of the present utility model, while extending the service life and reducing the maintenance frequency. In addition, the first annular beam and the second annular beam are nested in a way that their geometric centers coincide, so as to strengthen the central symmetry of the installation of the tunneling assembly, thereby improving the force uniformity of the tunneling assembly during operation, and further improving the balance and stability of the output of the tunneling assembly.

[0049] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the various technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as falling within the scope described in this specification.

[0050] The above-described embodiments merely represent several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.

Claims

1. A cutter head of a pipe jacking machine, characterized in that: include: A support and a tunneling assembly, wherein the tunneling assembly comprises a main radial arm group and a secondary radial arm group, and the main radial arm group and the secondary radial arm group are both installed on one side of the support; The support is provided with a first annular beam and a second annular beam, the first annular beam and the second annular beam are provided on one side of the support, and the first annular beam is sleeved on the outer side of the second annular beam; the main spoke arm group is installed on the first annular beam; the secondary spoke arm group is installed between the first annular beam and the second annular beam; The main spoke arm group includes a first main spoke arm, a second main spoke arm and a third main spoke arm. The first main spoke arm passes through the geometric center of the first annular beam and is erected on the side surface of the first annular beam and the second annular beam facing away from the support body; the second main spoke arm and the third main spoke arm are respectively erected on the surfaces of the first annular beam and the second annular beam on both sides of the first main spoke arm.

2. The cutter head of the pipe jacking machine according to claim 1, characterized in that: The first main spoke arm is provided with a plurality of center rollers, a plurality of first transition rollers and two first peripheral rollers; the plurality of center rollers are arranged in the middle of the first main spoke arm; the two first peripheral rollers are arranged at both ends of the first main spoke arm; and the plurality of first transition rollers are respectively arranged on both sides of the center roller.

3. The cutter head of the pipe jacking machine according to claim 1, characterized in that: The second main spoke arm is provided with a plurality of second transition rollers and second peripheral rollers. The second peripheral rollers are provided at the far end of the second main spoke arm relative to the first main spoke arm. The plurality of second transition rollers are provided at the main body of the second main spoke arm.

4. The cutter head of the pipe jacking machine according to claim 1, characterized in that: The third main spoke arm is provided with a plurality of third transition rollers and third peripheral rollers. The third peripheral rollers are provided at the far end of the third main spoke arm relative to the first main spoke arm. The plurality of third transition rollers are provided at the main body of the third main spoke arm.

5. The cutter head of the pipe jacking machine according to claim 1, characterized in that: The secondary spoke arm group includes a first spoke arm, a second spoke arm, a third spoke arm and a fourth spoke arm. The first spoke arm, the second spoke arm, the third spoke arm and the fourth spoke arm are respectively arranged at the fan surface formed between the first main spoke arm, the second main spoke arm and the third main spoke arm, and are respectively erected between the first annular beam and the second annular beam.

6. The cutter head of the pipe jacking machine according to claim 5, characterized in that: The first radial arm is provided with a plurality of first tearing knives and a fourth transition roller cutter. The fourth transition roller cutter is provided at one end of the first radial arm connected to the first annular beam; and the plurality of first tearing knives are provided at the main body of the first radial arm.

7. The cutter head of the pipe jacking machine according to claim 5, characterized in that: The second radial arm is provided with a plurality of second tearing knives and a fourth peripheral roller cutter. The fourth peripheral roller cutter is provided at one end of the second radial arm connected to the first annular beam; and the plurality of second tearing knives are provided at the main body of the second radial arm.

8. The cutter head of the pipe jacking machine according to claim 5, characterized in that: The main body of the third radial arm is provided with a plurality of third tearing knives and a fifth transition roller cutter, and the plurality of third tearing knives are arranged close to the second annular beam.

9. The cutter head of the pipe jacking machine according to claim 5, characterized in that: The fourth spoke arm is provided with a plurality of fourth tearing knives and a fifth peripheral roller cutter. The fifth peripheral roller cutter is provided at one end of the fourth spoke arm connected to the first annular beam. The plurality of fourth tearing knives are provided at the main body of the fourth spoke arm.

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