Rear support structure and tunnel boring machine

Abstract

The present invention provides a rear support structure and a tunnel boring machine, wherein the rear support structure comprises: a rear support frame; a fixed seat connected to the rear support frame; a support assembly slidably connected to the fixed seat and capable of sliding on the fixed seat along the height direction of the rear support structure; and a driving assembly connected to the support assembly for driving the support assembly to slide in the height direction. In the technical solution of the present invention, the support assembly is lifted and moved in the vertical direction under the action of the driving assembly. In this way, when the support assembly contacts the ground, a reaction force perpendicular to the ground is generated to vertically lift the support frame and other parts of the tunnel boring machine installed on the support frame, thereby avoiding the problem that the rear support structure in the related art is limited by its own structure, and the tunnel boring machine will slide forward or backward relative to the ground after the rear support structure lifts other parts of the tunnel boring machine, thereby enabling the rear support structure to vertically lift other parts of the tunnel boring machine.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of tunnel boring machine equipment, and in particular, to a rear support structure and a tunnel boring machine. Background Art

[0002] At present, when the tunnel boring machine is excavating or inspecting the walking part, it is necessary to use the shovel plate and the rear support structure to lift the whole machine, that is, to support the whole machine. However, the rear support structure is limited by its own structure. After lifting the equipment, the rear support structure will cause the tunnel boring machine to slide forward or backward, which may lead to inaccurate posture adjustment of the tunnel boring machine. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] To this end, an object of the present invention is to provide a rear support structure.

[0005] Another object of the present invention is to provide a tunneling machine.

[0006] In order to achieve the above-mentioned purpose, an embodiment of the present invention provides a rear support structure, which includes: a rear support frame; a fixed seat connected to the rear support frame; a support assembly slidably connected to the fixed seat, and the support assembly can slide on the fixed seat along the height direction of the rear support structure; and a driving assembly connected to the support assembly for driving the support assembly to slide in the height direction.

[0007] In this technical solution, the support assembly moves up and down along the height direction of the rear support structure, i.e., the vertical direction, under the action of the driving assembly. When the support assembly contacts the ground, a reaction force perpendicular to the ground and vertically upward is generated to vertically lift the support frame and other parts of the tunnel boring machine installed on the support frame, thereby avoiding the problem in the related art that the rear support structure is limited by its own structure and the tunnel boring machine will slide forward or backward relative to the ground after the rear support structure lifts other parts of the tunnel boring machine, thereby enabling the rear support structure to vertically lift other parts of the tunnel boring machine to ensure that the posture of the tunnel boring machine can be accurately adjusted to better complete the tunnel boring work.

[0008] In addition, the rear support structure in the above embodiment provided by the present invention may also have the following additional technical features:

[0009] In the above technical solution, a mounting hole is provided on the fixing seat, and the mounting hole is extended in the height direction. The support assembly includes: a guide shaft slidably disposed in the mounting hole; and a support member connected to an end of the guide shaft away from the fixing seat.

[0010] In this technical solution, the guide shaft matches the mounting hole, and the wall of the mounting hole has a guiding function, so that the guide shaft can only be extended and retracted in the vertical direction. This ensures that the tunnel boring machine can only be lifted and lowered vertically, thereby ensuring that the posture of the tunnel boring machine can be accurately adjusted to better complete the tunneling work.

[0011] In any of the above technical solutions, the support member includes: a top plate having a first end face and a second end face, the first end face being connected to the guide shaft; and at least one side plate, the side end of at least one side plate being connected to the second end face.

[0012] In this technical solution, the side plates increase the contact area between the support and the ground, making the ground contact pressure between the support and the ground smaller, making it suitable for soft rock or muddy ground that is prone to collapse, thereby increasing the applicability of the tunnel boring machine.

[0013] In any of the above technical solutions, when the support member includes a plurality of side panels, the plurality of side panels are arranged at intervals along the length direction of the rear support structure.

[0014] In this technical solution, multiple side plates and a top plate form a Π-shaped structure, which increases the contact area between the support and the ground, making the ground pressure ratio between the support and the ground smaller, making it suitable for soft rock or muddy ground that is prone to collapse, thereby increasing the applicability of the tunnel boring machine.

[0015] In any of the above technical solutions, the driving assembly includes two supporting cylinders, and the two supporting cylinders are symmetrically arranged relative to the central axis of the guide shaft.

[0016] In this technical solution, since the two supporting oil cylinders are symmetrically arranged relative to the central axis of the guide shaft, the guide shaft is evenly stressed and can be stably raised and lowered in the mounting hole, thereby ensuring that the tunnel boring machine can be stably lifted in the vertical direction, thereby improving the stability and reliability of the tunnel boring machine.

[0017] In any of the above technical solutions, the supporting oil cylinder includes a cylinder body and a piston rod telescopically arranged in the cylinder body, the cylinder body is rotatably connected to the fixing seat, and the piston rod is rotatably connected to the top plate of the supporting member.

[0018] In this technical solution, the support cylinder serves as a driving member that can drive the guide shaft to rise and fall. Since the support cylinder is rotatably connected to the support member and to the fixed seat, the support cylinder will not get stuck or jammed during the process of extending and retracting the guide shaft, thereby improving the stability and reliability of the rear support structure.

[0019] In any of the above technical solutions, the rear support structure further includes a connecting seat, which is arranged on the fixed seat and / or the supporting assembly and is rotatably connected to the driving assembly. The connecting seat is provided with a first connecting hole, the driving assembly is provided with a second connecting hole, and the rear support structure further includes a pin shaft, which is inserted into the first connecting hole and the second connecting hole.

[0020] In this technical solution, the fixed seat and the support assembly are rotatably connected to the drive assembly through the connecting seat, and the connecting seat improves the connection strength between the fixed seat and the drive assembly, as well as the connection strength between the support assembly and the drive assembly, thereby meeting the connection strength requirements between the fixed seat and the drive assembly, as well as the connection strength requirements between the support assembly and the drive assembly, thereby ensuring the stability and reliability of the rear support structure, and ensuring that the tunnel boring machine can be lifted and lowered smoothly. The rotational connection between the connecting seat and the drive assembly is achieved through the pin shaft, so that the rotational connection between the fixed seat and the drive assembly, as well as the rotational connection between the support assembly and the drive assembly, is achieved through the connecting seat, thereby improving the stability and reliability of the rear support structure.

[0021] In any of the above technical solutions, the rear support structure also includes an anti-skid and wear-resistant strip, which is arranged on the support member of the support assembly and is located on the side of the support member away from the guide shaft of the support assembly.

[0022] In this technical solution, the anti-skid wear strip has an anti-skid effect, and the anti-skid wear strip can ensure that the rear support structure does not slip when lifting other parts of the tunnel boring machine. This ensures that the rear support structure can vertically lift other parts of the tunnel boring machine, thereby ensuring that the posture of the tunnel boring machine can be accurately adjusted to better complete the tunneling work.

[0023] In any of the above technical solutions, the rear support structure also includes a pressing plate and fixing bolts, the pressing plate is used to fix the pin shaft of the rear support structure, and the fixing bolts are used to fix the pressing plate.

[0024] In this technical solution, the pressure plate is used to fix the pin of the rear support structure, thereby ensuring that the pin does not fall out of the first connecting hole and the second connecting hole, thereby ensuring that the rear support structure can work normally.

[0025] The technical solution of the second aspect of the present invention provides a roadheader, which includes: a main body; and a rear support structure as described in any one of the technical solutions of the first aspect, wherein the rear support structure is connected to the main body.

[0026] The tunnel boring machine provided by the technical solution of the second aspect of the present invention includes the rear support structure of any one of the technical solutions of the first aspect, and thus has all the beneficial effects of any of the above technical solutions, which will not be repeated here.

[0027] In the above scheme, since the tunnel boring machine is integrated with the rear support structure, it can be lifted and lowered vertically and will not slide forward or backward relative to the ground during or after the lifting process, thereby ensuring that the posture of the tunnel boring machine can be accurately adjusted to better complete the tunneling work.

[0028] Additional aspects and advantages of the present invention will become apparent in the following description or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0030] Figure 1 A schematic diagram of the three-dimensional structure of a rear support structure in the related art is shown;

[0031] Figure 2 A schematic diagram of the three-dimensional structure of a rear support structure according to an embodiment of the present invention is shown.

[0032] in, Figure 1 and Figure 2 The corresponding relationship between the reference numerals and the component names is as follows:

[0033] 10', rear support frame; 20', rear support cylinder; 30', support leg; 40', cylinder pin; 50', support leg swing pin; 10, rear support frame; 20, fixed seat; 30, support assembly; 32, guide shaft; 34, support member; 342, top plate; 3422, first end face; 3424, second end face; 344, side plate; 40, drive assembly; 42, support cylinder; 50, connecting seat; 60, pin; 70, anti-slip and wear-resistant strip; 80, pressure plate; 90, fixing bolt; 100, locking bolt. DETAILED DESCRIPTION

[0034] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0035] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0036] It should be noted that the functions of the rear support structure of the tunnel boring machine are as follows:

[0037] 1. Other auxiliary functional components, such as pump station motor components, electric control box, etc., can be placed on the rear support structure.

[0038] 2. When the tunnel boring machine is performing excavation work or inspecting the walking part, it is necessary to use the shovel plate and the rear support structure to lift the entire machine, that is, to support the entire machine.

[0039] It should be noted that the rear support structure of the tunnel boring machine in the related art is composed of a rear support frame, two symmetrical rear support cylinders, two legs, cylinder pins, and leg swing pins. When the tunnel boring machine is lifted using the rear support structure, the hydraulic circuit is usually used to supply oil to the rear support cylinder, and the rear support cylinder is extended, forcing the legs to rotate downward around the leg swing pins under the force of the cylinder extension until the legs are in contact with the ground. Under the continuous extension of the rear support cylinder, the reaction force is used to lift the entire tunnel boring machine.

[0040] Specifically, Figure 1 As shown, the rear support structure of the tunnel boring machine in the related art is composed of a rear support frame 10', two rear support cylinders 20' symmetrically arranged on both sides, two legs 30', a cylinder pin 40', a leg swing pin 50' and other parts. When the tunnel boring machine is lifted by using the rear support structure, the rear support cylinder 20' is usually supplied with oil by a hydraulic circuit, and the rear support cylinder 20' is extended, forcing the leg 30' to rotate downward around the leg swing pin 50' under the action of the rear support cylinder 20' until the leg 30' contacts the ground, and a reaction force is generated under the continuous extension of the rear support cylinder 20', and under the action of the reaction force, the entire tunnel boring machine is lifted.

[0041] Refer to the following Figure 2 A rear support structure according to some embodiments of the present invention is described.

[0042] like Figure 2 As shown, the present invention and the embodiments of the present invention provide a rear support structure, which includes a rear support frame 10, a fixing seat 20, a support assembly 30 and a driving assembly 40. The fixing seat 20 is connected to the rear support frame 10, and the support assembly 30 is slidably connected to the fixing seat 20 and can slide on the fixing seat 20 along the height direction of the rear support structure. The driving assembly 40 is connected to the support assembly 30 and is used to drive the support assembly 30 to slide in the height direction.

[0043] In the above arrangement, the support assembly 30 moves up and down along the height direction of the rear support structure, i.e., the vertical direction, under the action of the driving assembly 40. Thus, when the support assembly 30 contacts the ground, a reaction force perpendicular to the ground and vertically upward is generated to vertically lift the rear support frame 10 and other parts of the tunnel boring machine installed on the support frame, thereby avoiding the problem in the related art that the rear support structure is limited by its own structure, and the tunnel boring machine will slide forward or backward relative to the ground after the rear support structure lifts other parts of the tunnel boring machine, thereby enabling the rear support structure to vertically lift other parts of the tunnel boring machine, so as to ensure that the posture of the tunnel boring machine can be accurately adjusted to better complete the tunnel boring work.

[0044] It should be noted that after the tunnel boring machine is lifted, if it slides forward or backward relative to the ground, the horizontal positions of other parts of the tunnel boring machine will be offset, such as the cutting part will be offset, changing the cutting position of the cutting part, which may cause the tunnel boring machine to be unable to accurately adjust its posture. The fixing seat 20 is detachably connected to the rear support frame 10, and specifically, the fixing seat 20 is fixed to the rear support frame 10 by the locking bolt 100.

[0045] Specifically, Figure 2 As shown, in the embodiment of the present invention, a mounting hole is provided on the fixing seat 20, and the mounting hole is extended along the height direction of the rear support structure, and the support assembly 30 includes a guide shaft 32 and a support member 34. The guide shaft 32 is slidably arranged in the mounting hole. The support member 34 is connected to one end of the guide shaft 32 away from the fixing seat 20.

[0046] In the above arrangement, the guide shaft 32 cooperates with the mounting hole, and the hole wall of the mounting hole has a guiding function, so that the guide shaft 32 can only be extended and retracted in the vertical direction. This ensures that the tunnel boring machine can only be lifted and lowered vertically, thereby ensuring that the posture of the tunnel boring machine can be accurately adjusted to better complete the tunneling work.

[0047] Specifically, in the embodiment of the present invention, the guide shaft 32 is configured as a round shaft, and the corresponding mounting hole is configured as a round hole that matches the guide shaft 32. Of course, according to actual conditions, the guide shaft 32 can be configured as a square shaft or a shaft of other shapes, and the corresponding mounting hole can be configured as a square hole or a hole of other shapes that matches the guide shaft 32.

[0048] The support member 34 includes a top plate 342 and two side plates 344 . The top plate 342 has a first end surface 3422 and a second end surface 3424 . The first end surface 3422 is connected to the guide shaft 32 . The side ends of the two side plates 344 are connected to the second end surface 3424 .

[0049] In the above arrangement, the side plate 344 increases the contact area between the support member 34 and the ground, making the ground contact pressure between the support member 34 and the ground smaller, so that it is suitable for soft rock or muddy ground that is easy to collapse, thereby improving the application range of the tunnel boring machine.

[0050] Specifically, Figure 2 As shown, in the embodiment of the present invention, the support member 34 includes a top plate 342 and two side plates 344. The two side plates 344 are spaced apart along the length direction of the rear support structure.

[0051] In the above arrangement, the two side plates 344 and the top plate 342 form a Π-shaped structure, which increases the contact area between the support member 34 and the ground, making the grounding pressure ratio between the support member 34 and the ground smaller, thereby being suitable for soft rock or muddy ground that is prone to collapse, thereby increasing the applicability of the tunnel boring machine.

[0052] Of course, the support member 34 can be configured as a flat plate structure according to actual conditions to increase its contact area with the ground. Alternatively, the support member 34 can be provided with one or three or more side panels 344.

[0053] Specifically, Figure 2 As shown, in the embodiment of the present invention, the driving assembly 40 includes two supporting cylinders 42 , and the two supporting cylinders 42 are symmetrically arranged relative to the central axis of the guide shaft 32 .

[0054] In the above arrangement, the two supporting oil cylinders 42 are symmetrically arranged relative to the central axis of the guide shaft 32. This allows the guide shaft 32 to be evenly stressed and to be able to be stably lifted and lowered in the mounting hole, thereby ensuring that the tunnel boring machine can be stably lifted in the vertical direction, thereby improving the stability and reliability of the tunnel boring machine.

[0055] Specifically, Figure 2 As shown, in an embodiment of the present invention, the supporting cylinder 42 includes a cylinder body and a piston rod telescopically arranged in the cylinder body, the cylinder body is rotatably connected to one side of the fixing seat 20, and the piston rod is rotatably connected to the top plate 342 of the supporting member 34.

[0056] In the above arrangement, the support cylinder 42 serves as a driving member that can drive the guide shaft 32 to rise and fall. Since the support cylinder 42 is rotatably connected to the support member 34 and is rotatably connected to the fixed seat 20, the support cylinder 42 will not get stuck or jammed during the process of extending and retracting the guide shaft 32, thereby improving the stability and reliability of the rear support structure.

[0057] Specifically, Figure 2As shown, in an embodiment of the present invention, the rear support structure further includes a plurality of connection seats 50, which are respectively arranged on the fixed seat 20 and the support assembly 30, and the driving assembly 40 corresponds to the connection seat 50 and is rotatably connected.

[0058] In the above arrangement, the fixed seat 20 and the support assembly 30 are rotatably connected to the drive assembly 40 via the connecting seat 50. The connecting seat 50 improves the connection strength between the fixed seat 20 and the drive assembly 40, as well as the connection strength between the support assembly 30 and the drive assembly 40, thereby satisfying the connection strength requirements between the fixed seat 20 and the drive assembly 40, as well as the connection strength requirements between the support assembly 30 and the drive assembly 40, thereby ensuring the stability and reliability of the rear support structure, so as to ensure that the tunnel boring machine can be lifted and lowered smoothly.

[0059] Specifically, Figure 2 As shown, in an embodiment of the present invention, a first connecting hole is provided on the connecting seat 50, a second connecting hole is provided on the driving assembly 40, and the rear supporting structure further includes a pin shaft 60, which is passed through the first connecting hole and the second connecting hole.

[0060] In the above arrangement, the rotational connection between the connecting seat 50 and the driving assembly 40 is realized through the pin shaft 60, so that the rotational connection between the fixing seat 20 and the driving assembly 40 and the rotational connection between the supporting assembly 30 and the driving assembly 40 are realized through the connecting seat 50, thereby improving the stability and reliability of the rear support structure.

[0061] It should be noted that if Figure 2 As shown, in an embodiment of the present invention, the rear support structure further includes a pressing plate 80 and a fixing bolt 90. The pressing plate 80 is used to fix the pin shaft 60, and the fixing bolt 90 is used to fix the pressing plate 80. Specifically, a card slot is provided on the pin shaft 60, and the pressing plate 80 is inserted into the card slot as a card plate to axially fix the pin shaft 60 on the connecting seat 50.

[0062] Specifically, Figure 2 As shown, in the embodiment of the present invention, the rear support structure further includes an anti-skid wear strip 70 , which is disposed on the support member 34 of the support assembly 30 and is located on a side of the support member 34 away from the guide shaft 32 .

[0063] In the above arrangement, the anti-skid wear strip 70 has an anti-skid effect, and the anti-skid wear strip 70 can ensure that the rear support structure does not slip when lifting other parts of the tunnel boring machine. This ensures that the rear support structure can vertically lift other parts of the tunnel boring machine, thereby ensuring that the posture of the tunnel boring machine can be accurately adjusted to better complete the tunnel boring work.

[0064] Specifically, Figure 2As shown, in the embodiment of the present invention, there are two anti-skid wear-resistant strips 70, and the two anti-skid wear-resistant strips 70 are arranged one by one at the bottom of the two side plates 344. Further, the anti-skid wear-resistant strips 70 include a plurality of wear-resistant blocks arranged at intervals along the extension direction of the support member 34, and the wear-resistant blocks are welded to the bottom of the side plate 344, and the cross section of the wear-resistant blocks is V-shaped. Of course, according to actual conditions, the cross section of the wear-resistant blocks can be set to other shapes such as rectangle or trapezoid. The length of the anti-skid wear-resistant strip 70 is less than the length of the side plate 344.

[0065] The present invention further provides a roadheader, comprising a main body and a rear support structure as in any one of the embodiments of the first aspect. The rear support structure is connected to the main body.

[0066] The tunnel boring machine provided by the technical solution of the second aspect of the present invention includes the rear support structure of any one of the embodiments of the first aspect, and thus has all the beneficial effects of any of the above embodiments, which will not be described in detail here.

[0067] In the above arrangement, since the tunnel boring machine is integrated with a rear support structure, it can be lifted and lowered vertically and will not slide forward or backward relative to the ground during or after the lifting process, thereby ensuring that the posture of the tunnel boring machine can be accurately adjusted to better complete the tunneling work.

[0068] It should be noted that when the tunnel boring machine needs to be lifted by the rear support, the left and right support cylinders 42 are supplied with oil at the same time through the hydraulic system. The support cylinders 42 extend under the action of the hydraulic oil, forcing the Π-shaped structure to move vertically toward the ground under the action of the guide shaft 32, and finally contact the ground and generate a reaction force to lift the equipment.

[0069] The tunnel boring machine in this application has the following advantages:

[0070] 1. The bottom surface of the Π-type structure is flat, with a large contact area, a small ground pressure, and is not easy to sink. It is especially suitable for ground that is prone to sinking or soft rock ground;

[0071] 2. The plane of the force generated by the supporting oil cylinder 42 is theoretically perpendicular to the ground, so that the reaction force generated can make the device rise vertically without generating a component force that causes the device to move forward or backward.

[0072] From the above description, it can be seen that the support assembly 30 moves up and down along the height direction of the rear support structure, that is, the vertical direction, under the action of the driving assembly 40. In this way, when the support assembly 30 contacts the ground, a reaction force perpendicular to the ground and vertically upward is generated to vertically lift the rear support frame 10 and other parts of the tunnel boring machine installed on the support frame, thereby avoiding the problem that the rear support structure in the related art is limited by its own structure, and the tunnel boring machine will slide forward or backward relative to the ground after the rear support structure lifts other parts of the tunnel boring machine, thereby enabling the rear support structure to vertically lift other parts of the tunnel boring machine to ensure that the posture of the tunnel boring machine can be accurately adjusted to better complete the tunnel boring work.

[0073] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0074] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front” and “back” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0075] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. 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 invention. 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 can be combined in any one or more embodiments or examples in a suitable manner.

[0076] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rear support structure, characterized in that: The rear support structure comprises: rear support frame (10); A fixing seat (20) connected to the rear support frame (10); A support assembly (30) is slidably connected to the fixing seat (20), and the support assembly (30) is capable of sliding on the fixing seat (20) along a height direction of the rear support structure; A driving assembly (40) connected to the supporting assembly (30) and used to drive the supporting assembly (30) to slide in the height direction; The fixing seat (20) is provided with a mounting hole, the mounting hole extending along the height direction, and the supporting assembly (30) comprises: A guide shaft (32) slidably disposed in the mounting hole; A support member (34) connected to an end of the guide shaft (32) away from the fixing seat (20); The support member (34) comprises: A top plate (342) having a first end surface (3422) and a second end surface (3424), wherein the first end surface (3422) is connected to the guide shaft (32); A plurality of side panels (344), wherein the side ends of the side panels (344) are connected to the second end surface (3424); The plurality of side panels (344) and the top panel (342) form a Π-shaped structure, and the bottom surface of the Π-shaped structure is a plane.

2. The rear support structure according to claim 1, characterized in that: A plurality of side panels (344) are arranged at intervals along the length direction of the rear support structure.

3. The rear support structure according to claim 1, characterized in that: The driving assembly (40) comprises two supporting oil cylinders (42), and the two supporting oil cylinders (42) are symmetrically arranged relative to the central axis of the guide shaft (32).

4. The rear support structure according to claim 3, characterized in that: The supporting oil cylinder (42) comprises a cylinder body and a piston rod telescopically arranged in the cylinder body, the cylinder body is rotatably connected to the fixing seat (20), and the piston rod is rotatably connected to the top plate (342) of the supporting member (34).

5. The rear support structure according to any one of claims 1 to 4, characterized in that: The rear support structure further comprises a connecting seat (50), the connecting seat (50) being arranged on the fixing seat (20) and / or the supporting assembly (30), and being rotatably connected to the driving assembly (40), the connecting seat (50) being provided with a first connecting hole, the driving assembly (40) being provided with a second connecting hole, and the rear support structure further comprises a pin shaft (60), the pin shaft (60) being inserted into the first connecting hole and the second connecting hole.

6. The rear support structure according to any one of claims 1 to 4, characterized in that: The rear support structure further comprises an anti-skid wear-resistant strip (70), wherein the anti-skid wear-resistant strip (70) is arranged on the support member (34) of the support assembly (30) and is located on a side of the support member (34) away from the guide shaft (32) of the support assembly (30).

7. The rear support structure according to any one of claims 1 to 4, characterized in that: The rear support structure further comprises a pressing plate (80) and a fixing bolt (90), wherein the pressing plate (80) is used to fix the pin shaft (60) of the rear support structure, and the fixing bolt (90) is used to fix the pressing plate (80).

8. A tunnel boring machine, characterized in that: The tunnel boring machine comprises: Body part; and a rear support structure as claimed in any one of claims 1 to 7, wherein the rear support structure is connected to the main body portion.

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