Anti-loosening structure for shield tunneling machine ring piece and shield tunneling machine

Abstract

The utility model discloses a shield tunneling machine ring piece anti-loose structure and a shield tunneling machine, the shield tunneling machine ring piece anti-loose structure comprises a flange, a wear-resisting ring, a mounting ring, an axial limiting piece, an axial fastening piece, a radial connecting piece and an axial sealing piece, the axial limiting piece is respectively matched with the flange and the wear-resisting ring in an inserted mode in the axial direction so as to be used for limiting the wear-resisting ring on the flange in the radial direction; the axial fastening piece is connected with the flange and the wear-resisting ring in the axial direction so as to axially fasten the wear-resisting ring to the flange, and the radial connecting piece is in interference fit with the flange and the wear-resisting ring in the radial direction so as to axially connect the wear-resisting ring to the flange. The axial sealing element is arranged between the wear-resistant ring and the mounting ring along the axial direction and is used for axially sealing the wear-resistant ring; compared with the prior art, the anti-loosening structure is good in anti-loosening effect and not prone to losing efficacy, effective anti-loosening of the shield tunneling machine ring piece is achieved, the sealing performance is guaranteed, practicability is high, and the anti-loosening structure is suitable for wide application and popularization.

Description

TECHNICAL FIELD

[0001] The utility model relates to a shield machine part technical field, especially, relate to a shield machine ring piece is with anti looseness structure. BACKGROUND

[0002] The shield machine is a tunnel boring machine using shield method, is the complete equipment of collection and digs, transports, supports in an organic whole, and with the continuous development construction of modern city, makes tunnel scale continuous expansion, shield machine has obtained large -scale application.

[0003] At present, to prevent the loosening of the inner and outer wear rings in the main drive, mainly there are double nuts, lock washers, lock steel bars and self-locking nuts and other bolt anti-looseness structures, but the bolt anti-looseness structure will experience a large number of stress cycles and lead to the reduction or failure of the anti-looseness effect under the fatigue action in the long-term use process of the shield machine. UTILITY MODEL CONTENTS

[0004] The utility model provides a kind of shield machine ring piece is with anti looseness structure and shield machine, to solve the technical problem that the anti-looseness effect of the anti-looseness structure of the ring piece of existing shield machine is poor, easy to fail.

[0005] According to one aspect of the utility model, a kind of shield machine ring piece is with anti looseness structure, including flange, wear ring, installation ring, axial limiting piece, axial fastener, radial connecting piece and axial sealing element, axial limiting piece is respectively inserted with flange and wear ring along the axial direction and is matched with wear ring for wear ring is radially limited on flange, axial fastener is respectively connected with flange and wear ring along the axial direction and is used for wear ring is axially fastened on flange, radial connecting piece is respectively with flange and wear ring interference fit along the radial direction and is used for wear ring is axially connected on flange, axial sealing element is arranged between wear ring and installation ring along the axial direction and is used for wear ring is axially sealed.

[0006] As further improvement of the above technical solution:

[0007] Further, the axial end surface of the flange extends outward in the axial direction to form a radial connecting portion, the radial connecting portion is provided with a radial connecting hole one in the radial direction, the wear-resistant ring is provided with a radial connecting hole two corresponding to the radial connecting hole one in the radial direction, and the radial connecting member is in interference fit with the radial connecting hole one and the radial connecting hole two respectively.

[0008] Further, the radial connecting member includes a radial connecting pin in interference fit with the radial connecting hole one and the radial connecting hole two respectively, a buffer medium arranged in the radial connecting hole one and the radial connecting hole two, and a radial plug connected with the radial connecting hole one for blocking the buffer medium in the radial connecting hole one and the radial connecting hole two.

[0009] Further, the first end of the radial connecting pin is provided with a joint hole for connecting a pipeline to make the buffer medium flow in, the second end of the radial connecting pin is provided with a buffer cavity for accommodating the buffer medium, and the radial connecting pin is provided with a flow hole for the buffer medium to flow in the radial direction of the wear-resistant ring and in communication with the joint hole and the buffer cavity respectively.

[0010] Further, the radial end surface of the wear-resistant ring extends inward in the radial direction to form an axial connecting portion, the axial connecting portion is provided with an axial limiting hole one in the axial direction, the flange is provided with an axial limiting hole two corresponding to the axial limiting hole one in the axial direction, and the axial limiting member is arranged in the axial limiting hole one to be in plug-in fit with the axial limiting hole two.

[0011] Further, the axial limiting member includes an axial limiting pin arranged in the axial limiting hole one to be in plug-in fit with the axial limiting hole two, an axial plug one connected with the axial limiting hole one, and a buffer member one arranged between the axial plug one and the axial limiting pin.

[0012] Further, the axial connecting portion is provided with an axial fastening hole one in the axial direction, the flange is provided with an axial fastening hole two corresponding to the axial limiting hole one in the axial direction, and the axial fastening member is arranged in the axial fastening hole one to be in threaded connection with the axial fastening hole two.

[0013] Further, the axial fastening member includes a fastening screw arranged in the axial fastening hole one to be in threaded connection with the axial fastening hole two, an axial plug two connected with the axial fastening hole one, and a buffer member two arranged between the axial plug two and the fastening screw.

[0014] Further, the axial sealing member includes a plurality of lip-shaped seals arranged between the mounting ring and the wear-resistant ring, a sealing gasket ring arranged between two adjacent lip-shaped seals, and a compression ring at the two ends of the lip-shaped seal in abutment with the lip-shaped seal for fixing the plurality of lip-shaped seals in cooperation with the mounting ring.

[0015] According to another aspect of the utility model, a shield tunneling machine is also provided, which comprises the shield tunneling machine ring piece anti-loose structure.

[0016] The utility model has the following beneficial effects:

[0017] The utility model discloses a shield machine ring piece anti -loose structure, first through axial positioner along the axial direction respectively with flange and wear -resisting ring insert fit cooperation to with wear -resisting ring radial limit on flange, again through axial fastener along the axial direction respectively with flange and wear -resisting ring connection to with wear -resisting ring axial fastening on flange, then through radial connector along the radial direction respectively with flange and wear -resisting ring interference fit to with wear -resisting ring axial connection on flange, finally wear -resisting ring and the combined parts of flange are placed into the installation ring, and along the axial direction between wear -resisting ring and installation ring sets up axial seal, to through axial seal to wear -resisting ring carries out axial sealing, through axial positioner, axial fastener and radial connector three common effects under the scheme, ensure that wear -resisting ring work receives the restraint of double -action force in radial direction and axial direction, greatly improve the reliability of overall structure, improve the anti -loose effect to wear -resisting ring, and under the common effect of axial positioner and axial fastener, guarantee the coaxial degree of flange and wear -resisting ring, make wear -resisting ring during rotation not to cause too much wear and tear to axial seal, guarantee the sealing performance of axial seal, relative to prior art, the anti -loose effect of anti -loose structure is good, and it is not easy to fail, realizes the effective anti -loose of shield machine ring piece, guarantees the sealing performance, and the practicality is strong, is suitable for extensive promotion and application.

[0018] In addition to the purposes, features and advantages described above, the utility model has other purposes, features and advantages. Below, referring to the drawings, the utility model will be further detailed. ACCURACY

[0019] The drawings that form a part of this application are intended to provide further understanding of the utility model, and the illustrative embodiment of the utility model and its explanation are used to explain the utility model, and do not constitute undue limitation on the utility model. In the drawings:

[0020] Figure 1 It is the first view cross section schematic drawing of shield machine ring piece anti -loose structure of the utility model preferred embodiment;

[0021] Figure 2 It is the second view cross section schematic drawing of shield machine ring piece anti -loose structure of the utility model preferred embodiment;

[0022] Figure 3 It is the second view cross section schematic drawing of shield machine ring piece anti -loose structure of the utility model preferred embodiment;

[0023] Figure 4 It is the cross section schematic drawing of radial connecting pin in shield machine ring piece anti -loose structure of the utility model preferred embodiment.

[0024] Legend:

[0025] 10. Flange; 11. Radial connection; 20. Wear ring; 21. Axial connection; 30. Mounting ring; 41. Axial limiting pin; 42. Axial plug one; 43. Buffer component one; 51. Fastening screw; 52. Axial plug two; 53. Buffer component two; 61. Radial connecting pin; 611. Connector hole; 612. Buffer cavity; 613. Flow hole; 62. Buffer medium; 63. Radial plug; 71. Lip seal; 72. Sealing gasket ring; 73. Compression ring. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments disclosed in this application clearer, the technical solutions of the embodiments disclosed in this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments disclosed in this application. All other embodiments obtained by those skilled in the art based on the described embodiments of this application without creative effort are within the scope of protection of this application.

[0027] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an," "a," or "the," etc., do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising," "including," etc., mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. The terms "connected," "linked," etc., are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0028] like Figures 1-3 As shown, the anti-loosening structure for the shield machine ring components in this embodiment includes a flange 10, a wear-resistant ring 20, a mounting ring 30, an axial limiting member, an axial fastener, a radial connecting member, and an axial sealing member. The axial limiting member is inserted into the flange 10 and the wear-resistant ring 20 along the axial direction to radially limit the wear-resistant ring 20 on the flange 10. The axial fastener is connected to the flange 10 and the wear-resistant ring 20 along the axial direction to axially fasten the wear-resistant ring 20 to the flange 10. The radial connecting member is interference-fitted to the flange 10 and the wear-resistant ring 20 along the radial direction to axially connect the wear-resistant ring 20 to the flange 10. The axial sealing member is arranged between the wear-resistant ring 20 and the mounting ring 30 along the axial direction to provide axial sealing for the wear-resistant ring 20.

[0029] It should be understood that the axial, radial and circumferential directions in the embodiment are based on the axial, radial and circumferential directions of the wear-resistant ring 20.

[0030] Optionally, the axial limiting members are provided in plurality, and the plurality of axial limiting members are arranged in a circumferential direction.

[0031] Optionally, the axial fasteners are provided in plurality, and the plurality of axial fasteners are arranged in a circumferential direction.

[0032] Optionally, the radial connecting members are provided in plurality, and the plurality of radial connecting members are arranged in a circumferential direction.

[0033] As shown in the embodiment, the flange 10 and the wear-resistant ring 20 are connected through the axial limiting members, the axial fasteners and the radial connecting members. Figures 1-3 Specifically, the anti-loose structure of the shield machine ring piece of the utility model firstly inserts and cooperates with the flange 10 and the wear-resistant ring 20 along the axial direction through the axial limiting members to limit the wear-resistant ring 20 on the flange 10 in the radial direction, then connects the flange 10 and the wear-resistant ring 20 along the axial direction through the axial fasteners to fasten the wear-resistant ring 20 on the flange 10 in the axial direction, and then inserts and cooperates with the flange 10 and the wear-resistant ring 20 along the radial direction through the radial connecting members to connect the wear-resistant ring 20 on the flange 10 in the axial direction, finally, the combined part of the wear-resistant ring 20 and the flange 10 is placed into the installation ring 30, and the axial sealing member is arranged between the wear-resistant ring 20 and the installation ring 30 along the axial direction to seal the wear-resistant ring 20 in the axial direction through the axial sealing member; the axial limiting members, the axial fasteners and the radial connecting members jointly ensure that the wear-resistant ring 20 is constrained by the double-acting force in the radial direction and the axial direction during work, greatly improve the reliability of the overall structure, improve the anti-loose effect of the wear-resistant ring 20, and ensure the coaxiality of the flange 10 and the wear-resistant ring 20 under the joint action of the axial limiting members and the axial fasteners, so that the wear-resistant ring 20 does not cause excessive wear to the axial sealing member during rotation, and the sealing performance of the axial sealing member is ensured; compared with the prior art, the anti-loose structure has good anti-loose effect and is not easy to fail, effectively prevents the shield machine ring piece from loosening, ensures the sealing performance, has strong practicability, and is suitable for wide promotion and application.

[0034] As shown in the embodiment, the flange 10 and the wear-resistant ring 20 are connected through the axial limiting members, the axial fasteners and the radial connecting members. Figure 3 In the embodiment, the axial end surface of the flange 10 extends outward along the axial direction to form a radial connecting part 11, the radial connecting part 11 is provided with a radial connecting hole one along the radial direction, the wear-resistant ring 20 is provided with a radial connecting hole two corresponding to the radial connecting hole one along the radial direction, and the radial connecting members are in interference fit with the radial connecting hole one and the radial connecting hole two, respectively.

[0035] As shown in the embodiment, the flange 10 and the wear-resistant ring 20 are connected through the axial limiting members, the axial fasteners and the radial connecting members. Figure 3As shown, specifically, the axial end surface of the flange 10 is formed with a radial connecting portion 11 extending axially outward to provide an assembly position for the radial connecting piece, a radial connecting hole one is formed on the radial connecting portion 11, a radial connecting hole two is formed on the wear-resistant ring 20, and the radial connecting hole one and the radial connecting hole two are arranged correspondingly during assembly, so that the radial connecting piece is in interference fit with the radial connecting hole one and the radial connecting hole two respectively, thereby axially connecting the wear-resistant ring 20 to the flange 10 to constrain the wear-resistant ring 20 in the axial direction and improve the anti-loose effect of the wear-resistant ring 20.

[0036] As shown, Figure 3 It should be understood that the radial connecting hole one penetrates the radial connecting portion 11.

[0037] It should be understood that the radial connecting hole one and the radial connecting hole two can be formed first, and then the axial limiting piece, the axial fastener and the radial connecting piece are assembled in sequence; or the axial limiting piece and the axial fastener can be assembled first, and then the radial connecting hole one and the radial connecting hole two are formed to realize the assembly of the radial connecting piece; the former assembly method is beneficial to improve the assembly speed, and the latter assembly method is beneficial to improve the assembly precision.

[0038] It should be understood that the radial connecting piece is in interference fit with the flange 10 and the wear-resistant ring 20, which can make the flange 10 and the wear-resistant ring 20 into a stable mortise and tenon structure, and the structure is very reliable and has good anti-loose effect.

[0039] As shown, Figure 3 In the embodiment, the radial connecting piece includes a radial connecting pin 61 in interference fit with the radial connecting hole one and the radial connecting hole two, a buffer medium 62 arranged in the radial connecting hole one and the radial connecting hole two, and a radial plug 63 connected with the radial connecting hole one for plugging the buffer medium 62 in the radial connecting hole one and the radial connecting hole two.

[0040] It should be understood that the existing bolt fastener is usually sealed by glass glue after fastening, which is easy to be exposed outside the soil bin, and long-term contact with mud and other media can cause rust on the threads of the bolt, resulting in the bolt being unable to be removed or the threads being rotten, and the service life of the fastener is short.

[0041] As shown, Figure 3 Specifically, in the embodiment, the buffer medium 62 can buffer the radial movement of the radial connecting pin 61 caused by the rotation of the cutter head, and can also seal and protect the radial connecting pin 61, and the radial plug 63 can further improve the sealing performance of the radial limiting pin and prevent the radial limiting pin from falling off and the external mud from eroding the radial connecting pin 61, thereby prolonging the service life of the radial connecting pin 61.

[0042] As shown in Figure 4 In this embodiment, the first end of the radial connecting pin 61 is provided with a joint hole 611 for connecting a pipeline to allow the buffer medium 62 to flow in, and the second end of the radial connecting pin 61 is provided with a buffer cavity 612 for accommodating the buffer medium 62. The radial connecting pin 61 is provided with a flow-through hole 613 in communication with the joint hole 611 and the buffer cavity 612, respectively, for the flow of the buffer medium 62.

[0043] As shown in Figure 4 Specifically, after the radial connecting pin 61, the pipeline is connected through the joint hole 611 to allow the buffer medium 62 to flow into the buffer cavity 612 through the flow-through hole 613, ensuring reliable assembly of the radial connecting pin 61. When the radial connecting pin 61 needs to be disassembled, the pipeline is connected through the joint hole 611 to extract the buffer medium 62, so that the radial connecting pin 61 has a certain deformation allowance to facilitate quick disassembly of the radial connecting pin 61.

[0044] Optionally, the buffer medium 62 is grease, the pipeline is a grease pipe, and the joint hole 611 is threadedly connected with the grease pipe to realize pumping of the buffer medium 62.

[0045] As shown in Figure 2 In this embodiment, the radial end face of the wear-resistant ring 20 extends radially inward to form an axial connecting portion 21, the axial connecting portion 21 is provided with an axial limiting hole one along the axial direction, the flange 10 is provided with an axial limiting hole two corresponding to the axial limiting hole one along the axial direction, and the axial limiting member is inserted into the axial limiting hole one to be inserted into the axial limiting hole two.

[0046] As shown in Figure 2 Specifically, the axial connecting portion 21 provides an assembly position for the axial limiting member, and the axial limiting hole one is provided on the axial connecting portion 21, and the axial limiting hole two is provided on the flange 10, so that the axial limiting hole one and the axial limiting hole two are correspondingly arranged during assembly, so that the axial limiting member can pass through the axial limiting hole one to be inserted into the axial limiting hole two.

[0047] It should be understood that the axial limiting hole one penetrates through the axial connecting portion 21.

[0048] As shown in Figure 2 In this embodiment, the axial limiting member includes an axial limiting pin 41 inserted into the axial limiting hole one to be inserted into the axial limiting hole two, an axial plug one 42 connected with the axial limiting hole one, and a buffer one 43 arranged between the axial plug one 42 and the axial limiting pin 41.

[0049] Optionally, the buffer one 43 is glass glue. In another embodiment, the buffer one 43 is a sealing gasket or a spring.

[0050] As shown in Figure 2 Specifically, after the axial limiting pin 41 is installed, the buffer 43 is arranged in the axial limiting hole, and then the axial plug 42 is arranged to connect the axial limiting hole, so as to buffer the axial limiting pin 41 from shaking, and the axial plug 42 can further improve the sealing performance of the axial limiting pin 41, prevent the axial limiting pin 41 from being eroded by mud, and prolong the service life of the axial limiting pin 41.

[0051] As shown in Figure 1 and Figure 2 In this embodiment, the axial connecting part 21 is provided with an axial fastening hole one along the axial direction, the flange 10 is provided with an axial fastening hole two corresponding to the axial limiting hole one along the axial direction, and the axial fastening member is arranged in the axial fastening hole one to be screwed with the axial fastening hole two.

[0052] As shown in Figure 1 and Figure 2 Specifically, the axial connecting part 21 can also provide an assembly position for the axial fastening member, so that the axial fastening hole one is arranged on the axial connecting part 21, the axial fastening hole two is arranged on the flange 10, and the axial fastening hole one is arranged corresponding to the axial fastening hole two during assembly, and then the axial fastening member is arranged in the axial fastening hole one to be screwed with the axial fastening hole two, so that the flange 10 and the wear-resistant ring 20 are connected as a whole.

[0053] As shown in Figure 1 In this embodiment, the axial fastening member includes a fastening screw 51 arranged in the axial fastening hole one to be screwed with the axial fastening hole two, an axial plug two 52 connected with the axial fastening hole one, and a buffer two 53 arranged between the axial plug two 52 and the fastening screw 51.

[0054] In this embodiment, the buffer two 53 is glass glue. In another embodiment, the buffer two 53 is a sealing gasket or a spring.

[0055] As shown in Figure 1 Specifically, after the fastening screw 51 is installed, the buffer 43 is arranged in the axial fastening hole one, and then the axial plug two 52 is arranged to connect the axial fastening hole one, so as to buffer the axial fastening pin from shaking, and the axial plug two 52 can further improve the sealing performance of the fastening screw 51, prevent the fastening screw 51 from being eroded by mud, and prolong the service life of the fastening screw 51.

[0056] As shown in Figure 1As shown, in the embodiment, the axial seal member includes a plurality of lip seals 71 arranged between the mounting ring 30 and the wear ring 20, a gasket ring 72 arranged between two adjacent lip seals 71, and a compression ring 73 abutting the lip seals 71 and used to fix the axial both ends of the plurality of lip seals 71 in cooperation with the mounting ring 30.

[0057] As shown, specifically, the axial both ends of the plurality of lip seals 71 are fixed axially by the mounting ring 30 and the wear ring 20, and the axial positioning of the two adjacent lip seals 71 is realized by the gasket ring 72, so as to mount the plurality of lip seals 71 between the mounting ring 30 and the wear ring 20, thereby realizing the axial sealing of the wear ring 20 and preventing the penetration of mud and water. Figure 1

[0058] It should be understood that the axial both ends of the plurality of lip seals 71 refer to the axial ends of the first lip seal 71 and the last lip seal 71 opposite to each other in the plurality of lip seals 71 arranged in sequence along the axial direction.

[0059] It should be understood that the number of the gasket rings 72 depends on the number of the lip seals 71, when the lip seals 71 are three, the gasket rings 72 are two; when the lip seals 71 are four, the gasket rings 72 are three; that is, the gasket rings 72 are always one less than the lip seals 71.

[0060] The shield machine of the embodiment includes the anti-loose structure for shield machine rings as described above. Specifically, since the technical effect of the shield machine provided by the embodiment is the same as that of the anti-loose structure for shield machine rings provided by the above-mentioned embodiment, this will not be described here.

[0061] The above only describes the preferred embodiments of the utility model and is not used to limit the utility model. For those skilled in the art, the utility model can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.​

Claims

1. A shield tunneling machine ring piece anti-loosening structure, characterized in that, The application relates to a flange (10), a wear ring (20), a mounting ring (30), an axial limiting piece, an axial fastening piece, a radial connecting piece and an axial sealing piece, the axial limiting piece is in axial plug-in connection with the flange (10) and the wear ring (20) respectively for radially limiting the wear ring (20) on the flange (10), the axial fastening piece is in axial connection with the flange (10) and the wear ring (20) respectively for axially fastening the wear ring (20) on the flange (10), the radial connecting piece is in radial interference fit with the flange (10) and the wear ring (20) respectively for axially connecting the wear ring (20) on the flange (10), and the axial sealing piece is arranged between the wear ring (20) and the mounting ring (30) along the axial direction for axially sealing the wear ring (20).

2. The anti-loosening structure for a shield machine ring according to claim 1, characterized in that, The axial end surface of the flange (10) extends outward along the axial direction to form a radial connecting part (11), the radial connecting part (11) is provided with a radial connecting hole one along the radial direction, the wear ring (20) is provided with a radial connecting hole two corresponding to the radial connecting hole one along the radial direction, and the radial connecting piece is in interference fit with the radial connecting hole one and the radial connecting hole two respectively.

3. The shield machine ring piece anti-loosening structure according to claim 2, characterized in that, The radial connecting piece comprises a radial connecting pin (61) in interference fit with the radial connecting hole one and the radial connecting hole two, a buffer medium (62) arranged in the radial connecting hole one and the radial connecting hole two, and a radial plug (63) connected with the radial connecting hole one for blocking the buffer medium (62) in the radial connecting hole one and the radial connecting hole two.

4. The shield machine ring piece anti-loosening structure according to claim 3, characterized in that, The first end of the radial connecting pin (61) is provided with a joint hole (611) for connecting a pipeline to make the buffer medium (62) flow in, the second end of the radial connecting pin (61) is provided with a buffer cavity (612) for containing the buffer medium (62), and the radial connecting pin (61) is provided with a flow-through hole (613) for the buffer medium (62) to flow through along the radial direction of the wear ring (20) and in communication with the joint hole (611) and the buffer cavity (612) respectively.

5. The shield machine ring piece anti-loosening structure according to any one of claims 1-4, characterized in that, The radial end surface of the wear ring (20) extends inward along the radial direction to form an axial connecting part (21), the axial connecting part (21) is provided with an axial limiting hole one along the axial direction, the flange (10) is provided with an axial limiting hole two corresponding to the axial limiting hole one along the axial direction, and the axial limiting piece is arranged in the axial limiting hole one to be in plug-in connection with the axial limiting hole two.

6. The shield machine ring piece anti-loosening structure according to claim 5, characterized in that, The axial limiting piece comprises an axial limiting pin (41) arranged in the axial limiting hole one to be in plug-in connection with the axial limiting hole two, an axial plug one (42) connected with the axial limiting hole one, and a buffer piece one (43) arranged between the axial plug one (42) and the axial limiting pin (41).

7. The shield machine ring piece anti-loosening structure according to claim 5, characterized in that, The axial connecting part (21) is provided with an axial fastening hole one along the axial direction, the flange (10) is provided with an axial fastening hole two corresponding to the axial limiting hole one along the axial direction, and the axial fastening piece is arranged in the axial fastening hole one to be in threaded connection with the axial fastening hole two.

8. The shield machine ring piece anti-loosening structure according to claim 7, characterized in that, The axial fastener comprises a fastening screw (51) penetrating through the axial fastening hole one to be screwed with the axial fastening hole two, an axial plug two (52) connected with the axial fastening hole one, and a buffer two (53) arranged between the axial plug two (52) and the fastening screw (51).

9. The shield machine ring piece anti-loosening structure according to any one of claims 1-4, characterized in that, The axial seal comprises a plurality of lip seals (71) arranged between the mounting ring (30) and the wear-resistant ring (20), a seal gasket ring (72) arranged between two adjacent lip seals (71), and a compression ring (73) at the two axial ends of the lip seal (71) for cooperating with the mounting ring (30) to fix the plurality of lip seals (71).

10. A tunneling machine characterized by, The shield tunneling machine ring piece anti-loosening structure comprises the shield tunneling machine ring piece anti-loosening structure according to any one of claims 1-9.

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