A heading machine main machine and a heading machine

Abstract

This invention belongs to the technical field of tunneling equipment, specifically disclosing a tunneling machine main unit and a tunneling machine. The main unit of the tunneling machine includes a cutterhead and a shield. A jacking mechanism is hinged to the front partition of the shield via a universal hinge structure. The jacking mechanism includes a jacking body and a jacking drive device for driving the jacking body to move forward to jack the tunnel face. The cutterhead is provided with a clearance hole for avoiding the jacking body. The tunneling machine includes the aforementioned main unit. This invention achieves universal swing of the jacking mechanism through the universal hinge structure, enabling the jacking body to jack the tunnel face at different angles, providing the shield with a counter-thrust force in any direction (up / down / left / right), assisting the shield in adjusting its attitude in different directions. If shield jamming occurs, regardless of the location of the jam, the jacking mechanism can provide the shield with the necessary counter-thrust force, thereby solving the problems of shield attitude adjustment and main unit retraction difficulties.

Description

Technical Field

[0001] This invention belongs to the field of tunneling equipment technology, and in particular relates to a tunneling machine host and a tunneling machine. Background Technology

[0002] During normal tunneling, the cutterhead and shield posture of the tunneling machine need to be monitored and adjusted promptly to adapt to the target tunneling trajectory. However, when tunneling in hard rock formations, factors such as rock hardness and tunnel convergence can easily lead to shield jamming, making it impossible to adjust the shield posture. Moreover, during cutter replacement, because the new cutter is larger, the cutterhead and shield need to be retracted a certain distance to allow space for its installation. Shield jamming can make it difficult for the main unit to retract, thus affecting the efficiency of cutter replacement.

[0003] To adjust the shield's attitude, existing technologies typically employ an articulated main structure. This involves placing articulated cylinders between the front shield and the shield body behind it, controlling the extension and retraction of these cylinders at different positions to adjust the shield's attitude. However, due to the large number of equipment and components within the front shield, coupled with the weight of the cutterhead, the front of the articulation is quite heavy. If shield jamming occurs, slippage can easily occur at the rear of the articulation, making it difficult to complete attitude adjustment and main body retraction using only the articulated cylinders.

[0004] Patent CN113446015B (publication date: September 28, 2021) discloses a dual-mode tunnel boring machine (TBM). This TBM includes a hydraulic retraction system fixed to the shield body. Its push rod passes through the cutterhead and pushes against the front working face. When the cutterhead jams, the hydraulic retraction system provides thrust to retract the shield body. However, this hydraulic retraction system can only provide a horizontal backward thrust to the shield body. Since shield jamming can occur in any direction around the shield body, providing only one direction of thrust is insufficient. Summary of the Invention

[0005] The purpose of this invention is to provide a tunneling machine host to solve the technical problems of difficulty in adjusting the shield's attitude and retracting the host in the prior art. Another purpose of this invention is to provide a tunneling machine to solve the same technical problems described above.

[0006] To achieve the above objectives, the technical solution for the tunneling machine main unit provided by the present invention is as follows:

[0007] A tunneling machine main unit includes a cutterhead and a shield body. A jacking mechanism is hinged to the front partition of the shield body via a universal hinge structure. The jacking mechanism includes a jacking body and a jacking drive device for driving the jacking body to move forward to jack the tunnel face. The cutterhead is provided with a clearance hole for avoiding the jacking body.

[0008] The beneficial effects are as follows: This invention improves the shield structure in the prior art. A jacking mechanism is configured on the front partition of the shield via a universal hinge structure. The jacking body of the jacking mechanism extends forward to support the tunnel face, providing a counter-thrust force for the shield to escape and retract. The universal hinge structure enables the jacking mechanism to swing in all directions, allowing the jacking body to push against the tunnel face at different angles, providing a counter-thrust force to the shield in any direction (up / down / left / right), assisting the shield in adjusting its attitude in different directions. If shield jamming occurs, regardless of the location of the jam, the jacking mechanism can provide the necessary counter-thrust force to the shield, thus solving the problems of difficult shield attitude adjustment and main unit retraction.

[0009] As a further improvement, the tunneling machine main unit also includes an attitude adjustment device for adjusting the swing posture of the jacking mechanism.

[0010] The beneficial effect is that it makes it easier to control the swing posture of the jacking mechanism.

[0011] As a further improvement, the attitude adjustment device includes a swing drive for driving the jacking mechanism to swing.

[0012] The beneficial effect is that it further improves the convenience of adjusting the attitude of the jacking mechanism.

[0013] As a further improvement, the swing drive device includes at least two telescopic power devices. At least one telescopic power device is located on one of the upper and lower sides of the jacking mechanism, and at least one telescopic power device is located on one of the left and right sides of the jacking mechanism. One end of each telescopic power device is hinged to the jacking mechanism, and the other end is hinged to the front partition of the shield body or other fixed objects of the tunneling machine main unit through a universal hinge structure.

[0014] The beneficial effects are: compared with rotary drive devices, telescopic power devices are easier to install and control, making installation and use more convenient.

[0015] As a further improvement, the jacking drive device is a jacking cylinder, and the piston rod of the jacking cylinder forms the jacking body.

[0016] The beneficial effect is that the hydraulic cylinder can withstand a large counter-force while outputting a large jacking force, making the jacking structure more stable.

[0017] As a further improvement, the piston cylinder of the jacking cylinder is connected to the front diaphragm of the shield body via a ball joint structure.

[0018] The beneficial effects are: the ball joint structure has good sealing performance and is easy to maintain good lubrication.

[0019] As a further improvement, the front end of the pusher body is provided with a support shoe.

[0020] The beneficial effect is that it increases the contact area between the jacking body and the tunnel face, making the contact between the jacking body and the tunnel face more stable.

[0021] As a further improvement, the support shoe and the pusher body are connected by a ball joint structure.

[0022] The beneficial effect is that by setting up a ball joint structure, the support shoe can also swing relative to the pusher body. After the pusher body swings to a certain angle, the support shoe can swing adaptively, always keeping the support shoe in contact with the machine face and maintaining a large contact area.

[0023] As a further improvement, the shield body is provided with at least a number of blocks and a number of water jet nozzles pointing outwards on its lower outer periphery.

[0024] The beneficial effect is that high-pressure water jets can be sprayed out of the outside of the shield through water jet nozzles, which can flush out the scum between the shield and the tunnel wall, thereby reducing the risk of the shield getting stuck.

[0025] As a further improvement, the shield body is provided at least at the lower part with a lubricating medium nozzle facing outward.

[0026] The beneficial effect is that lubricating grease or other lubricating fluids can be injected into the outside of the shield through the lubricating medium nozzle, reducing the friction between the lower part of the shield and the tunnel wall, and facilitating the shield's retraction.

[0027] As a further improvement, the jacking mechanism is arranged in pairs on both sides of the center of the front bulkhead of the shield.

[0028] The beneficial effect is that the jacking bodies of the two jacking mechanisms extend synchronously, so that the shield can have a large counter-pushing force when it is escaping and retracting in any direction and adjusting its attitude, thus improving the retraction efficiency.

[0029] As a further improvement, the distances from the jacking mechanisms on both sides to the center of the front bulkhead of the shield are equal.

[0030] The advantages are: it facilitates manufacturing and installation. At the same time, during normal retraction and tool changing of the main unit, the pushing mechanisms on both sides can maintain the same stroke, making control easier.

[0031] To achieve the above objectives, the technical solution for the tunneling machine provided by this invention is as follows:

[0032] The tunneling machine includes a tunneling machine main unit, which includes a cutterhead and a shield. A jacking mechanism is hinged to the front partition of the shield via a universal hinge structure. The jacking mechanism includes a jacking body and a jacking drive device for driving the jacking body to move forward to jack the working face. The cutterhead is provided with a clearance hole for avoiding the jacking body.

[0033] The beneficial effects are as follows: This invention improves the shield structure in the prior art. A jacking mechanism is configured on the front partition of the shield via a universal hinge structure. The jacking body of the jacking mechanism extends forward to support the tunnel face, providing a counter-thrust force for the shield to escape and retract. The universal hinge structure enables the jacking mechanism to swing in all directions, allowing the jacking body to push against the tunnel face at different angles, providing a counter-thrust force to the shield in any direction (up / down / left / right), assisting the shield in adjusting its attitude in different directions. If shield jamming occurs, regardless of the location of the jam, the jacking mechanism can provide the necessary counter-thrust force to the shield, thus solving the problems of difficult shield attitude adjustment and main unit retraction.

[0034] As a further improvement, the tunneling machine main unit also includes an attitude adjustment device for adjusting the swing posture of the jacking mechanism.

[0035] The beneficial effect is that it makes it easier to control the swing posture of the jacking mechanism.

[0036] As a further improvement, the attitude adjustment device includes a swing drive for driving the jacking mechanism to swing.

[0037] The beneficial effect is that it further improves the convenience of adjusting the attitude of the jacking mechanism.

[0038] As a further improvement, the swing drive device includes at least two telescopic power devices. At least one telescopic power device is located on one of the upper and lower sides of the jacking mechanism, and at least one telescopic power device is located on one of the left and right sides of the jacking mechanism. One end of each telescopic power device is hinged to the jacking mechanism, and the other end is hinged to the front partition of the shield body or other fixed objects of the tunneling machine main unit through a universal hinge structure.

[0039] The beneficial effects are: compared with rotary drive devices, telescopic power devices are easier to install and control, making installation and use more convenient.

[0040] As a further improvement, the jacking drive device is a jacking cylinder, and the piston rod of the jacking cylinder forms the jacking body.

[0041] The beneficial effect is that the hydraulic cylinder can withstand a large counter-force while outputting a large jacking force, making the jacking structure more stable.

[0042] As a further improvement, the piston cylinder of the jacking cylinder is connected to the front diaphragm of the shield body via a ball joint structure.

[0043] The beneficial effects are: the ball joint structure has good sealing performance and is easy to maintain good lubrication.

[0044] As a further improvement, the front end of the pusher body is provided with a support shoe.

[0045] The beneficial effect is that it increases the contact area between the jacking body and the tunnel face, making the contact between the jacking body and the tunnel face more stable.

[0046] As a further improvement, the support shoe and the pusher body are connected by a ball joint structure.

[0047] The beneficial effect is that by setting up a ball joint structure, the support shoe can also swing relative to the pusher body. After the pusher body swings to a certain angle, the support shoe can swing adaptively, always keeping the support shoe in contact with the machine face and maintaining a large contact area.

[0048] As a further improvement, the shield body is provided with at least a number of blocks and a number of water jet nozzles pointing outwards on its lower outer periphery.

[0049] The beneficial effect is that high-pressure water jets can be sprayed out of the outside of the shield through water jet nozzles, which can flush out the scum between the shield and the tunnel wall, thereby reducing the risk of the shield getting stuck.

[0050] As a further improvement, the shield body is provided at least at the lower part with a lubricating medium nozzle facing outward.

[0051] The beneficial effect is that lubricating grease or other lubricating fluids can be injected into the outside of the shield through the lubricating medium nozzle, reducing the friction between the lower part of the shield and the tunnel wall, and facilitating the shield's retraction.

[0052] As a further improvement, the jacking mechanism is arranged in pairs on both sides of the center of the front bulkhead of the shield.

[0053] The beneficial effect is that the jacking bodies of the two jacking mechanisms extend synchronously, so that the shield can have a large counter-pushing force when it is escaping and retracting in any direction and adjusting its attitude, thus improving the retraction efficiency.

[0054] As a further improvement, the distances from the jacking mechanisms on both sides to the center of the front bulkhead of the shield are equal.

[0055] The advantages are: it facilitates manufacturing and installation. At the same time, during normal retraction and tool changing of the main unit, the pushing mechanisms on both sides can maintain the same stroke, making control easier. Attached Figure Description

[0056] Figure 1 This is a schematic diagram of the structure of the tunneling machine main unit in Embodiment 1 of the present invention;

[0057] Figure 2 This is a schematic diagram of the jacking mechanism in Embodiment 1 of the tunneling machine main unit of the present invention;

[0058] Figure 3 This is a schematic diagram of the jacking mechanism in the horizontally extended state of Embodiment 1 of the tunneling machine main unit in this invention;

[0059] Figure 4This is a schematic diagram of the jacking mechanism in the downward swinging extension state of Embodiment 1 of the tunneling machine main unit in this invention;

[0060] Figure 5 This is a schematic diagram showing the connection relationship between the jacking cylinder and the support shoe in Embodiment 1 of the tunneling machine main unit of the present invention;

[0061] Figure 6 for Figure 5 An exploded view of the connection point between the central thrust cylinder and the support shoe;

[0062] Figure 7 for Figure 5 A schematic diagram of the connection between the center pin and the ball joint;

[0063] Figure 8 This is a schematic diagram of the connection between the flushing and lubrication system and the shield body in Embodiment 1 of the tunneling machine of the present invention;

[0064] Figure 9 This is a schematic diagram from another perspective of the connection between the flushing and lubrication system and the shield body in Embodiment 1 of the tunneling machine in this invention;

[0065] Figure 10 This is a schematic diagram of the arrangement of the jacking system in Embodiment 1 of the tunneling machine in this invention.

[0066] Explanation of reference numerals in the attached figures:

[0067] 1. Cutterhead; 2. Shield body; 3. Rear hinge; 4. Hinge cylinder; 5. Push cylinder; 6. Front partition; 7. Swing cylinder; 8. Support shoe; 9. First ball joint; 10. Ball joint mounting base; 11. Oil nozzle; 12. Second ball joint; 13. Pin; 14. Screw; 15. Ball socket; 16. Ball head; 17. Stop block; 18. Water jet nozzle; 19. Lubricating medium nozzle. Detailed Implementation

[0068] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0069] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0070] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the process or method that includes said element.

[0071] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0072] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the term "provided with" should be interpreted broadly. For example, the object "provided with" can be a part of the main body, or it can be separately arranged from the main body and connected to the main body. This connection can be a detachable connection or a non-detachable connection. Those skilled in the art can understand the specific meaning of the above terms in this invention through specific circumstances.

[0073] The present invention will be further described in detail below with reference to the embodiments.

[0074] Specific embodiment 1 of the tunneling machine main unit provided by the present invention:

[0075] The tunneling machine host provided in this embodiment is as follows: Figure 1 As shown, it includes a cutterhead 1 and a hinged shield structure. The hinged shield structure is consistent with the prior art, including a shield 2 with a hinged front part, a hinged hydraulic cylinder 4, and a hinged rear part 3. The specific structure of each part will not be described in detail.

[0076] like Figure 1 and Figure 2As shown, the front partition 6 of the shield body 2 is connected to a jacking mechanism. The jacking mechanism has a jacking body that can extend and retract the front side of the front partition 6 to jack the front face. The jacking body provides a counter-thrust force for the shield body 2 and the main unit to retract by supporting the face. The cutterhead 1 is provided with a clearance hole through which the jacking body can pass. Specifically, in this embodiment, the jacking mechanism includes a jacking cylinder 5. The jacking cylinder 5 is both a driving device for jacking the jacking body forward and a jacking body formed by the piston rod of the jacking cylinder 5 for jacking the face. The piston cylinder of the jacking cylinder 5 is connected to the front partition 6 through a first ball joint 9. Specifically, a ball joint mounting seat 10 is fixedly connected to the rear end of the front partition 6. The first ball joint 9 is installed in the ball joint mounting seat 10 to realize the omnidirectional swing of the jacking cylinder 5 relative to the front partition 6. The ball joint mounting seat 10 is provided with an oil nozzle 11 for lubrication. A swing drive device for driving the push cylinder 5 to swing is provided between the front partition 6 and the push cylinder 5. Specifically, the swing drive device is a swing cylinder 7. At least two swing cylinders 7 should be provided, with at least one located above or below the push cylinder and at least one located to the left or right of the push cylinder, so as to realize the up-and-down or left-and-right swing of the push cylinder 5. In this embodiment, two swing cylinders 7 are provided on each of the upper / lower and left / right sides. One end of the swing cylinder 7 is connected to the push cylinder with a mounting plate, and the connection is detachable by screws 14. The other end of the swing cylinder 7 is connected to the front partition 6 through a second ball joint 12, thereby preventing the swing cylinders 7 on the two sides perpendicular to the swing direction from being twisted when the push cylinder 5 swings. Of course, the swing cylinder 7 can also be directly replaced by a cylinder or an electric push rod or other telescopic power device, and the other end of the swing cylinder 7 can also be connected to other fixed structures of the tunneling machine main unit.

[0077] In this embodiment, when it is necessary to adjust the attitude of the shield body 2 or when the shield body 2 is stuck, the swing cylinder 7 is adjusted, and the push cylinder 5 is adjusted to a suitable angle. The push cylinder 5 extends out to support the face of the shield body, providing a counter-thrust force for the shield body 2 to adjust its attitude or retreat to escape from the blockage. Figure 3 As shown, if shield 2 jams, the control swing cylinder 7 adjusts the different postures of the push cylinder 5 multiple times. The piston rod of the push cylinder 5 extends and pushes the working face, providing different directions of counter-thrust for shield 2 to retract. Regardless of the location of the jam, the push mechanism can provide the shield with the necessary counter-thrust. Simultaneously, the main unit's retraction facilitates cutter replacement operations. Figure 4 As shown, if it is necessary to adjust the attitude of the shield body 2 upwards, the jacking cylinder 5 is adjusted to swing downwards at a certain angle. At this time, the jacking cylinder 5 supports the tunnel face and provides an upward counter-thrust force to the shield body 2, thereby realizing the attitude adjustment of the shield body. The difference between this embodiment and the existing articulated main unit is that the jacking cylinder 5 is used to push the tunnel face directly to provide counter-thrust force for the attitude adjustment and retraction of the shield body, without being affected by the friction between the rear articulated part 3 and the tunnel wall. The thrust of the jacking cylinder 5 can be utilized to the maximum extent.

[0078] The piston rod of the jacking cylinder 5 is also connected to a support shoe 8. The support shoe 8 increases the contact area between the jacking cylinder 5 and the working face, making the retraction process more stable. To ensure that the support shoe 8 has the maximum contact area with the working face at any position of the jacking cylinder 5, the support shoe 8 is also connected to the jacking cylinder 5 through a ball joint structure. Figures 5-7 As shown, the piston rod of the push cylinder 5 has a ball head 16 at its front end, and the support shoe 8 has a ball socket 15 that mates with the ball head 16. The ball head 16 has a mounting hole with a central diameter smaller than the diameters at both ends, and a central diameter larger than the diameter of the pin 13. The pin 13 passes through this mounting hole to connect the ball head 15 and the ball head 16. Due to the shape of the mounting hole, the pin 13 still has a degree of freedom to swing in different directions, realizing the adaptive adjustment of the support shoe 8.

[0079] like Figure 8 and Figure 9 As shown, multiple blocks 17 are provided on the lower outer circumference of the shield body 2. The presence of the blocks 17 reduces the contact area between the shield body 2 and the bottom of the tunnel wall, thus reducing the friction between the shield body 2 and the tunnel bottom. Multiple water jet nozzles 18 and lubricating medium nozzles 19 are also provided between the blocks. In use, the water jet nozzles 18 can be connected to the water jet pump on the tunnel boring machine, and the lubricating medium nozzles 19 can be connected to the grease pump on the tunnel boring machine. First, high-pressure water jets are sprayed through the water jet nozzles 18 to blow out the accumulated debris between the shield body 2 and the tunnel bottom, reducing the risk of shield jamming. Then, grease can be injected between the shield body 2 and the tunnel bottom through the lubricating medium nozzles to reduce the coefficient of friction, reduce friction, reduce the risk of shield jamming, and improve retraction efficiency. Of course, in actual use, other types of fluid lubricating media can also be injected through the lubricating medium nozzles 19.

[0080] like Figure 10 As shown, in this embodiment, the pushing mechanisms are arranged in pairs on both sides of the front partition 6 (on both sides relative to the center of the front partition 6). The pushing mechanisms on both sides form a combined force, which can improve the retraction efficiency. Furthermore, the distances from the pushing mechanisms on both sides to the center of the front partition 6 are equal, which facilitates manufacturing and installation. At the same time, when the main machine is retracting normally for tool changing, the pushing mechanisms on both sides can maintain the same stroke, which is convenient for control.

[0081] The specific embodiment 2 of the tunneling machine main unit provided by this invention differs from embodiment 1 mainly in that: in embodiment 1, the swing cylinder 7 is used to drive the jacking cylinder 5 to swing in order to adjust the attitude of the jacking cylinder 5. In this embodiment, the swing cylinder 7 is not included. If the shield gets stuck and it is difficult to adjust the attitude, a person enters the excavation chamber and manually or using tools drives the jacking cylinder 5 to swing to a suitable position. Then, a limit rod or other type of limit structure is installed on site to lock the position of the jacking cylinder 5.

[0082] The specific embodiment 3 of the tunneling machine main unit provided by this invention differs from embodiment 1 mainly in that: in embodiment 1, the swing cylinder 7 is used to drive the jacking cylinder 5 to swing in order to adjust the attitude of the jacking cylinder 5. In this embodiment, the swing cylinder 7 is not included, that is, the drive device is not included. A manual eccentric winch is provided between the jacking cylinder 5 and the front partition 6. If the shield gets stuck and it is difficult to adjust the attitude, a person enters the excavation chamber and manually rotates the eccentric winch to adjust the attitude of the jacking cylinder 5.

[0083] The specific embodiment 4 of the tunneling machine main unit provided by the present invention is similar to embodiment 3. In embodiment 3, the attitude adjustment device is a manual eccentric winch. In this embodiment, the eccentric winch is connected to a drive motor, which drives the eccentric winch to swing eccentrically, thereby realizing the swing of the jacking cylinder 5.

[0084] The specific embodiment 5 of the tunneling machine main unit provided by this invention differs from embodiment 1 mainly in that: in embodiment 1, the jacking mechanism includes a jacking cylinder 5, which is both a driving device and its piston rod forms the jacking body. In this embodiment, the jacking mechanism includes a mounting cylinder, which is connected to the front partition plate via a ball joint structure. A gear and rack structure is provided inside the mounting cylinder. The gear is connected to a hydraulic motor, and the rack moves back and forth under the drive of the gear to achieve jacking of the tunnel face. Of course, the jacking mechanism can also be a screw and nut mechanism, the principle of which is similar to the gear and rack structure, and will not be described further.

[0085] The specific embodiment 6 of the tunneling machine main unit provided by the present invention differs from embodiment 1 mainly in that: in embodiment 1, the jacking cylinder 5 is universally hinged to the front partition through a ball joint structure. In this embodiment, the jacking cylinder is connected to the front partition through a cross-shaped hinge structure.

[0086] The specific embodiment 7 of the tunneling machine main unit provided by the present invention differs from embodiment 1 mainly in that: in embodiment 1, the piston rod of the jacking cylinder 5 is connected to a support shoe at its front end. In this embodiment, the piston rod of the jacking cylinder does not have a support shoe at its front end, yet it can still achieve the jacking action on the tunnel face.

[0087] The specific embodiment 8 of the tunneling machine main unit provided by the present invention differs from embodiment 1 mainly in that: in embodiment 1, the jacking cylinders are arranged in pairs symmetrically. In this embodiment, only one jacking cylinder can be set. By adjusting the jacking cylinder to swing in different directions, it can still provide jacking force in different directions to the shield body, so as to realize the adjustment of the shield body's attitude and escape from obstacles.

[0088] Specific embodiments of the tunneling machine in this invention:

[0089] The tunneling machine includes the tunneling machine main unit and the supporting system. The supporting system is existing technology and will not be described in detail here. The tunneling machine main unit is the tunneling machine main unit described in any of the embodiments 1 to 8 above, and will not be described in detail here.

[0090] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A tunneling machine main unit, comprising a cutterhead and a shield, characterized in that, A jacking mechanism is hinged to the front bulkhead of the shield body via a universal hinge structure. The jacking mechanism includes a jacking body and a jacking drive device for driving the jacking body to move forward to jack the tunnel face. The cutterhead is provided with a clearance hole for avoiding the jacking body. The tunneling machine also includes an attitude adjustment device for adjusting the swing posture of the jacking mechanism. The attitude adjustment device includes at least two telescopic power devices. At least one telescopic power device is located on one of the upper and lower sides of the jacking mechanism, and at least one telescopic power device is located on one of the left and right sides of the jacking mechanism. One end of each telescopic power device is hinged to the jacking mechanism, and the other end is hinged to the front bulkhead of the shield body or other fixed objects of the tunneling machine via a universal hinge structure.

2. The tunneling machine main unit according to claim 1, characterized in that, The jacking drive device is a jacking cylinder, and the piston rod of the jacking cylinder forms the jacking body.

3. The tunneling machine main unit according to claim 2, characterized in that, The piston cylinder of the jacking cylinder is connected to the front diaphragm of the shield body via a ball joint structure.

4. The tunneling machine main unit according to claim 1, characterized in that, The front end of the pusher is provided with a support shoe.

5. The tunneling machine main unit according to claim 4, characterized in that, The support shoe and the pusher body are connected by a ball joint structure.

6. The tunneling machine main unit according to claim 1, characterized in that, The shield body is provided with at least a number of blocks and a number of water jet nozzles pointing outwards on its lower outer periphery.

7. The tunneling machine main unit according to claim 6, characterized in that, The shield body is also provided with a lubricating medium nozzle facing outward at least the lower part.

8. The tunneling machine main unit according to claim 1, characterized in that, The jacking mechanisms are arranged in pairs on both sides of the center of the front bulkhead of the shield.

9. The tunneling machine main unit according to claim 8, characterized in that, The distance from the jacking mechanism on both sides to the center of the front bulkhead of the shield is equal.

10. A tunneling machine, characterized in that, Includes the tunneling machine host as described in any one of claims 1-9.

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