Subway segment bolt structure

Abstract

The utility model relates to the technical field of subway segment bolts, and provides a subway segment bolt structure which comprises a bolt body and a self-locking mechanism, the surface of the bolt body is in threaded connection with a nut, the self-locking mechanism is arranged on one side of the surface of the bolt body, and a spraying mechanism is arranged on the surface of the nut. According to the subway segment bolt structure, a second mounting groove and a limiting groove are aligned, when a button is pressed down, a first sliding rod drives a limiting block to move, a fixing block drives a second spring to stretch and deform, a sliding block moves towards a clamping block, the sliding block presses the clamping block, and finally the clamping block is driven to move into the first mounting groove; when the button is loosened, the first sliding rod rebounds and slides, when one side of the clamping block is attached to the limiting block, the limiting block is separated from limitation of the clamping block through the sliding block, then the limiting block and the sliding block move from one side of the limiting groove to the second mounting groove, and after one side of the limiting block completely leaves the limiting groove, the nut can be rotated.

Description

Technical Field

[0001] The utility model relates to the technical field of subway segment bolts, and specifically, to a subway segment bolt structure. Background Technique

[0002] Subway segment bolts are fasteners used to connect and fix subway tunnel lining segments. They are usually made of high-strength materials, with corrosion resistance, pressure resistance and high stability. Their main function is to ensure the tight connection between subway tunnel segments, enhance the integrity and safety of the tunnel structure, and prevent the tunnel from loosening or displacing due to external forces such as pressure and vibration during construction and use.

[0003] A Chinese patent discloses a subway segment bolt structure with the publication number CN217814455U. It is proposed in the text that "an anti-rust fixing component is installed near the nut on the bolt rod. A rotating shaft is welded to the edge of the positioning ring near the nut side. The rotating shaft is rotatably connected to a protective cover. Connecting plates are welded to the ends of the two protective covers away from the rotating shaft. The two connecting plates are connected by a connecting screw rod. The inside of the protective cover is filled with oil-absorbing sponge. An oil plug is movably embedded in the oil injection hole. A semi-circular rubber ring is adhered to the protective cover near the bolt rod. An annular rubber ring is adhered to the positioning ring away from the nut side. In the utility model, the nut pushes the positioning ring to slide along the bolt rod until the positioning ring is tightly fixed at the nut installation gap, and then the protective cover is rotated to merge the two protective covers to completely wrap the nut, and the protective cover will clamp the outside of the bolt rod to fix the nut and prevent the nut from loosening during vibration. Subsequently, anti-rust oil is dripped into the oil injection hole to moisten the oil-absorbing sponge, prevent the nut thread from rusting, extend the service life, and make the use more convenient."

[0004] However, the above solution can only prevent the loosening of the bolt and ensure that the bolt at the connection is not corroded. During the long-term operation of the shield machine, a large amount of vibration will be generated. This mechanism cannot quickly lock the position of the bolt, and the parts will loosen during vibration, thereby affecting the use efficiency. Therefore, it is very necessary to design a subway segment bolt structure. Content of the Utility Model

[0005] The purpose of the utility model is to provide a subway segment bolt structure, which solves the problem in the related technology that the position of the bolt cannot be quickly locked, and the parts will loosen during vibration, thereby affecting the use efficiency.

[0006] The technical solution of the utility model is as follows:

[0007] A subway segment bolt structure includes a bolt main body and a self-locking mechanism. A nut is threadedly connected to the surface of the bolt main body. A self-locking mechanism is arranged on one side of the surface of the bolt main body. A spraying mechanism is arranged on the surface of the nut;

[0008] The self-locking mechanism includes a limit groove, a first sliding groove, a first installation groove, a second installation groove, a first sliding rod, a first spring, a second sliding groove, a second spring, a fixed block, a limit block, a button, a slider, a second sliding rod, a third spring, and a clamping block. A limit groove is provided on one side of the surface of the bolt body, a first sliding groove is provided on one side of the surface of the nut, a first installation groove is provided on one side of the limit groove, a second installation groove is provided at one end of the first sliding groove, a first sliding rod is fitted inside the first sliding groove, a first spring is installed on one side of the first installation groove, a second sliding groove is provided on one side of the first installation groove, a second spring is installed on one side of the surface of the second installation groove, a fixed block is fixedly connected to the surface of the first sliding rod, a limit block is connected to one end of the first sliding rod, a button is connected to the other end of the first sliding rod, a slider is fitted on the surface of the first sliding rod, a second sliding rod is fitted inside the second sliding groove, a third spring is fixedly connected to one side of the limit block, and a clamping block is connected to one side of the second sliding rod.

[0009] Preferably, the positions of the limit groove and the second installation groove are opposite to each other. There are eight groups of limit grooves, and the limit grooves are equally angularly distributed on the bolt body.

[0010] Preferably, the limit block is fitted inside the limit groove, and one side of the limit block is in contact with one side of the clamping block.

[0011] Preferably, the other side of the first spring is connected to the clamping block, and the second sliding rod and the second sliding groove form a mutually sliding structure through the first spring.

[0012] Preferably, the other side of the second spring is connected to the fixed block, and the first sliding rod and the first sliding groove form a mutually sliding structure through the second spring.

[0013] Preferably, the slider is located between the fixed block and the limit block, and the other side of the third spring is connected to the slider.

[0014] Preferably, the button is arranged outside the nut, and the slider and the first sliding rod form a mutually sliding structure through the third spring.

[0015] Preferably, the first spring is arranged outside the second sliding rod, and the second spring and the third spring are arranged outside the first sliding rod.

[0016] Preferably, the spraying mechanism includes a connecting sleeve, a communicating groove, a feed inlet, a storage ring, and a protective cover. A connecting sleeve is fixedly connected to the surface of the nut, a communicating groove is provided on the surface of the nut, a feed inlet is provided at one end of the connecting sleeve, a storage ring is provided on one side of the feed inlet, and a protective cover is threadedly connected to the surface of the feed inlet.

[0017] Preferably, one side of the communicating groove is connected to a material storage ring, and the material storage rings are distributed at equal intervals on the nut.

[0018] Beneficial effects of the utility model:

[0019] The self-locking mechanism is set up, and the self-locking mechanism ensures that the nut will not loosen due to vibration or external force during use through the cooperation of the limit groove and the limit block, thereby maintaining the stability and safety of the connection. The self-locking mechanism can quickly release the locking state through button control, making maintenance and disassembly work easier and more efficient. The precise positioning and locking functions enhance the anti-loosening performance of the bolt, improve the reliability of the overall structure, and reduce the possibility of failure. The spray mechanism is set up, and the spray mechanism can evenly spray lubricants onto the nut and other contact parts to reduce friction and extend the service life of the parts. The spray mechanism can be used to spray preservatives to protect the bolts from corrosion, especially in harsh environments, to extend the service life of the bolts. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0021] Figure 1 It is a side cross-sectional structural schematic diagram of the utility model;

[0022] Figure 2 This is a schematic cross-sectional view of the self-locking mechanism of the utility model;

[0023] Figure 3 It is a partial cross-sectional exploded structural diagram of the self-locking mechanism of the utility model;

[0024] Figure 4 It is a schematic diagram of the partial sectional exploded structure of the spray mechanism of the utility model;

[0025] Figure 5 For the utility model Figure 3 The enlarged structural diagram at A in the middle;

[0026] Figure 6 For the utility model Figure 3 The enlarged structural diagram at B in the middle;

[0027] Figure 7 For the utility model Figure 4 Enlarged structural diagram at point C in the middle;.

[0028] In the figure: 1. Bolt body; 2. Nut; 3. Self-locking mechanism; 301. Limit groove; 302. First chute; 303. First installation groove; 304. Second installation groove; 305. First slide bar; 306. First spring; 307. Second chute; 308. Second spring; 309. Fixed block; 310. Limit block; 311. Button; 312. Slide block; 313. Second slide bar; 314. Third spring; 315. Locking block; 4. Spraying mechanism; 401. Connecting sleeve; 402. Communication groove; 403. Feed inlet; 404. Material storage ring; 405. Protective cover; Detailed implementation manners

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0030] Embodiment 1

[0031] The preferred embodiment of the subway segment bolt structure provided by the present invention is as Figures 1 to 7 shown: A subway segment bolt structure includes a bolt body 1 and a self-locking mechanism 3. A nut 2 is threadedly connected to the surface of the bolt body 1. A self-locking mechanism 3 is provided on one side of the surface of the bolt body 1. A spraying mechanism 4 is provided on the surface of the nut 2;

[0032] The self-locking mechanism 3 includes a limiting groove 301, a first sliding groove 302, a first installation groove 303, a second installation groove 304, a first sliding rod 305, a first spring 306, a second sliding groove 307, a second spring 308, a fixing block 309, a limiting block 310, a button 311, a slider 312, a second sliding rod 313, a third spring 314 and a clamping block 315. A limiting groove 301 is formed on one side of the surface of the bolt body 1, and a first sliding groove 302 is formed on one side of the surface of the nut 2. A first installation groove 303 is formed on one side of the limiting groove 301, and a second installation groove 304 is formed at one end of the first sliding groove 302. A first sliding rod 305 is fitted inside the first sliding groove 302. A first spring 306 is installed on one side of the first installation groove 303. A second sliding groove 307 is formed on one side of the first installation groove 303. A second spring 308 is installed on one side of the surface of the second installation groove 304. A fixing block 309 is fixedly connected to the surface of the first sliding rod 305. One end of the first sliding rod 305 is connected to a limiting block 310, and the other end of the first sliding rod 305 is connected to a button 311. A slider 312 is fitted on the surface of the first sliding rod 305. A second sliding rod 313 is fitted inside the second sliding groove 307. A third spring 314 is fixedly connected to one side of the limiting block 310. One side of the second sliding rod 313 is connected to a clamping block 315. Through the settings of the limiting groove 301, the first sliding groove 302, the first installation groove 303, the second installation groove 304, the first sliding rod 305, the first spring 306, the second sliding groove 307, the second spring 308, the fixing block 309, the limiting block 310, the button 311, the slider 312, the second sliding rod 313, the third spring 314 and the clamping block 315, when the nut 2 is threadedly connected to the bolt body 1, the self-locking mechanism 3 will play a limiting and locking role to prevent the nut 2 from loosening. The second installation groove 304 provided on the nut 2 is aligned with the limiting groove 301 provided on the surface of the bolt body 1. The limiting grooves 301 are annularly distributed on the bolt body 1 to ensure the limiting function at multiple angles. When the button 311 is pressed, the first sliding rod 305 drives the fixing block 309 and the limiting block 310 to move. The fixing block 309 drives the second spring 308 to stretch and deform, thereby causing the slider 312 to move towards the clamping block 315. When the slider 312 and the clamping block 315 are in contact, the slider 312 will press the clamping block 315, causing the clamping block 315 to drive the second sliding rod 313 to move. At the same time, the movement of the second sliding rod 313 causes the first spring 306 to be compressed and deformed, finally driving the clamping block 315 to move into the first installation groove 303. When the other end of the clamping block 315 completely passes by the slider 312, release the button 311. The second spring 308 rebounds and deforms, driving the first sliding rod 305 to move. The first sliding rod 305 drives the limiting block 310 and the clamping block 315 to move. At the same time, the movement of the clamping block 315 causes the third spring 314 to be compressed and deformed. When one side of the clamping block 315 is in contact with the limiting block 310, the limiting block 310 will break away from the restriction of the clamping block 315 through the slider 312.Then the limiting block 310 and the sliding block 312 move from one side of the limiting groove 301 to the second installation groove 304. When one side of the limiting block 310 completely leaves the limiting groove 301, the nut 2 can be rotated.

[0033] In this embodiment, the position of the limit groove 301 and the second installation groove 304 is relatively positive, and eight groups of limit grooves 301 are arranged. The limit grooves 301 are distributed at equal angles on the bolt body 1. Through the setting of the limit grooves 301, the limit grooves 301 are distributed in a ring shape on the surface of the bolt body 1, and are usually arranged in multiple groups. Such a design enables the nut 2 to be locked by the block 315 at different rotation angles to achieve stable positioning at multiple angles. This function is very suitable for structures that require multi-gear adjustment. At the same time, when the nut 2 reaches the set position, the cooperation between the limit groove 301 and the block 315 can effectively prevent the nut 2 from accidentally rotating or loosening due to external force, thereby ensuring that the precise position after adjustment is not easily changed.

[0034] In this embodiment, the limit block 310 is embedded in the limit groove 301, and the limit block 310 and one side of the clamping block 315 are in contact with each other. Through the setting of the limit block 310, the limit block 310 is used in conjunction with the limit groove 301. When the nut 2 is tightened into place, the limit block 310 enters the limit groove 301 under the drive of the first slide rod 305, and locks the nut 2 in a predetermined position. This design can effectively prevent the nut 2 from loosening under force or vibration, realize the self-locking function of the bolt, and ensure the stability of the connection.

[0035] In this embodiment, the other side of the first spring 306 is connected to the block 315, and the second slide bar 313 forms a mutual sliding structure with the second slide groove 307 through the first spring 306. Through the setting of the second slide bar 313, the second slide bar 313 cooperates with the second slide groove 307 to ensure that the sliding component in the self-locking mechanism 3 moves on a specific track, which plays a role of precise guidance and auxiliary positioning. It makes the entire self-locking and unlocking process smoother and effectively avoids the sliding component from being offset or stuck. When the self-locking mechanism 3 is in a locked state, the second slide bar 313 is connected to the block 315. During the self-locking process, the block 315 uses the force of the first spring 306 to firmly embed the limit block 310 into the limit groove 301, thereby helping to fix the position of the nut 2 and further enhancing the stability of the self-locking.

[0036] In this embodiment, the other side of the second spring 308 is connected to the fixing block 309, and the first slide bar 305 forms a mutually sliding structure with the first slide groove 302 through the second spring 308. Through the setting of the first slide bar 305, when the nut 2 is tightened into place, the first slide bar 305 pushes the limit block 310 into the limit groove 301 to achieve self-locking of the nut 2. The limit block 310 cooperates with the limit groove 301 under the push of the first slide bar 305 to prevent the nut 2 from loosening due to vibration or external force, which enables the first slide bar 305 to play a controlling and locking role in the entire self-locking process. When the button 311 is pressed, the first slide bar 305 will overcome the pressure of the second spring 308, withdraw the limit block 310 from the limit groove 301, and release the self-locking state. The sliding of the first slide bar 305 directly controls the movement of the limit block 310. Therefore, it plays a key role in the unlocking operation, so that the nut 2 can be loosened smoothly.

[0037] In this embodiment, the slider 312 is located between the fixed block 309 and the limit block 310, and the other side of the third spring 314 is connected to the slider 312. Through the setting of the fixed block 309, the fixed block 309 maintains the pressure of the second spring 308 through its position. In the process of tightening or unlocking the nut 2, the second spring 308 applies a reaction force to the first slide bar 305 through the fixed block 309, ensuring that the slide bar can be smoothly reset after unlocking. The fixed block 309 plays an important supporting role in maintaining the elastic force of the spring.

[0038] In this embodiment, the button 311 is arranged on the outside of the nut 2, and the slider 312 forms a mutual sliding structure with the first slide bar 305 through the third spring 314. Through the setting of the slider 312, the slider 312 is embedded in the surface of the first slide bar 305 to ensure the stability during the sliding process. It ensures that the entire mechanism maintains smooth sliding during the locking or unlocking process through the coordinated effect with the slide bar and other components, so that the limit block 310 can smoothly enter or exit the limit groove 301, thereby realizing precise self-locking and unlocking functions.

[0039] In this embodiment, the first spring 306 is arranged outside the second sliding rod 313, and the second spring 308 and the third spring 314 are arranged outside the first sliding rod 305. Through the arrangement of the first spring 306, the second spring 308 and the third spring 314, the first spring 306 is located outside the second sliding rod 313 and is connected to the latch 315. It provides elastic support for the second sliding rod 313 and can apply elastic force to the latch 315 during the self-locking or unlocking process to ensure the tight fit between the latch 315 and the limiting block 310, thereby realizing the self-locking function. The second spring 308 is connected between the fixed block 309 and the first chute 302. Its main function is to provide a thrust for the first sliding rod 305 to push the limiting block 310 into the limiting groove 301 to realize the self-locking function. When the nut 2 is tightened, the second spring 308 pushes the first sliding rod 305 to slide through the fixed block 309, so that the limiting block 310 can be smoothly stuck into the limiting groove 301. The third spring 314 transmits force through the slider 312 during the self-locking and unlocking processes. It effectively transmits the force on the first sliding rod 305 to the limiting block 310 to help the limiting block 310 smoothly enter or exit the limiting groove 301. At the same time, when the unlocking operation is completed, the elastic force of the third spring 314 helps the limiting block 310 to reset, making it ready for the next self-locking operation.

[0040] Embodiment 2

[0041] On the basis of Embodiment 1, a preferred embodiment of the subway segment bolt structure provided by the present utility model is as Figures 1 to 7 shown: The spraying mechanism 4 includes a connecting sleeve 401, a communication groove 402, a feed port 403, a storage ring 404 and a protective cover 405. The surface of the nut 2 is fixedly connected with the connecting sleeve 401. A communication groove 402 is opened on the surface of the nut 2. One end of the connecting sleeve 401 is provided with a feed port 403. A storage ring 404 is opened on one side of the feed port 403. The surface of the feed port 403 is threadedly connected with a protective cover 405. Through the arrangement of the connecting sleeve 401, the communication groove 402, the feed port 403, the storage ring 404 and the protective cover 405, the spraying mechanism 4 is arranged on the surface of the nut 2. Its purpose is to spray lubricant or other media during the use of the bolt. The spraying mechanism 4 is realized through components such as the connecting sleeve 401, the communication groove 402, and the feed port 403. During operation, the external medium enters the storage ring 404 through the feed port 403. The storage ring 404 is evenly distributed on the outer surface of the nut 2. When spraying is required, the medium enters the surface of the nut 2 through the communication groove 402 to form an even spraying effect so as to achieve the purpose of lubrication or cooling. The protective cover 405 is used to close the feed port 403 to prevent the leakage or pollution of the medium.

[0042] In this embodiment, one side of the communication groove 402 is connected to the material storage ring 404. The material storage rings 404 are evenly distributed on the nut 2. Through the setting of the communication groove 402, the communication groove 402 serves as a fluid channel to connect the material storage ring 404 with the outside world. Its main function is to guide the liquid or substance injected through the feed port 403 into the material storage ring 404 to achieve the functions of storage and transportation. This design enables the entire spraying mechanism 4 to smoothly carry out the flow and distribution of substances.

[0043] To sum up, the working principle of this mechanism: When the nut 2 is threadedly connected to the bolt body 1, the self-locking mechanism 3 will play a limiting and locking role to prevent the nut 2 from loosening. The second installation groove 304 provided on the nut 2 is aligned with the limiting groove 301 provided on the surface of the bolt body 1. The limiting grooves 301 are annularly distributed on the bolt body 1 to ensure the limiting function from multiple angles. When the button 311 is pressed, the first sliding rod 305 drives the fixing block 309 and the limiting block 310 to move. The fixing block 309 drives the second spring 308 to stretch and deform, and then makes the slider 312 move towards the clamping block 315. When the slider 312 and the clamping block 315 are in contact, the slider 312 will press the clamping block 315, causing the clamping block 315 to drive the second sliding rod 313 to move. At the same time, the movement of the second sliding rod 313 causes the first spring 306 to compress and deform, and finally drives the clamping block 315 to move into the first installation groove 303. When the other end of the clamping block 315 completely passes the slider 312, release the button 311. The second spring 308 rebounds and deforms, driving the first sliding rod 305 to move. The first sliding rod 305 drives the limiting block 310 and the clamping block 315 to move. At the same time, the movement of the clamping block 315 causes the third spring 314 to compress and deform. When one side of the clamping block 315 is in contact with the limiting block 310, the limiting block 310 will break away from the restriction of the clamping block 315 through the slider 312, and then the limiting block 310 and the slider 312 move from one side of the limiting groove 301 into the second installation groove 304. When one side of the limiting block 310 completely leaves the limiting groove 301, the nut 2 can be rotated. The surface of the nut 2 is provided with a spraying mechanism 4, the purpose of which is to spray lubricant or other media during the use of the bolt. The spraying mechanism 4 is realized through components such as the connecting sleeve 401, the communication groove 402, and the feed port 403. During operation, the external medium enters the material storage ring 404 through the feed port 403. The material storage rings 404 are evenly distributed on the outer surface of the nut 2. When spraying is required, the medium enters the surface of the nut 2 through the communication groove 402 to form a uniform spraying effect in order to achieve the purpose of lubrication or cooling. The protective cover 405 is used to close the feed port 403 to prevent medium leakage or pollution.

[0044] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, 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 subway segment bolt structure, characterized in that: It comprises a bolt body (1) and a self-locking mechanism (3), characterized in that: a nut (2) is threadedly connected to the surface of the bolt body (1), a self-locking mechanism (3) is arranged on one side of the surface of the bolt body (1), and a spraying mechanism (4) is arranged on the surface of the nut (2); The self-locking mechanism (3) comprises a limiting groove (301), a first sliding groove (302), a first mounting groove (303), a second mounting groove (304), a first sliding rod (305), a first spring (306), a second sliding groove (307), a second spring (308), a fixing block (309), a limiting block (310), a button (311), a sliding block (312), a second sliding rod (313), a third spring (314) and a clamping block (315); a limiting groove (301) is provided on one side of a surface of the bolt body (1); a first sliding groove (302) is provided on one side of a surface of the nut (2); a first mounting groove (303) is provided on one side of the limiting groove (301); a second mounting groove (304) is provided at one end of the first sliding groove (302); a first spring (304) is embedded in the interior of the first sliding groove (302); A slide bar (305), a first spring (306) is installed on one side of the first installation groove (303), a second slide groove (307) is opened on one side of the first installation groove (303), a second spring (308) is installed on one side of the surface of the second installation groove (304), a fixed block (309) is fixedly connected to the surface of the first slide bar (305), one end of the first slide bar (305) is connected to a limit block (310), the other end of the first slide bar (305) is connected to a button (311), a slider (312) is embedded on the surface of the first slide bar (305), a second slide bar (313) is embedded in the interior of the second slide groove (307), a third spring (314) is fixedly connected to one side of the limit block (310), and a clamping block (315) is connected to one side of the second slide bar (313).

2. A subway segment bolt structure according to claim 1, characterized in that: The positions of the limiting grooves (301) and the second installation grooves (304) are relatively aligned, eight groups of the limiting grooves (301) are provided, and the limiting grooves (301) are distributed at equal angles on the bolt body (1).

3. The subway segment bolt structure according to claim 1, characterized in that: The limiting block (310) is embedded in the limiting groove (301), and one side of the limiting block (310) and the clamping block (315) are in contact with each other.

4. The subway segment bolt structure according to claim 1, characterized in that: The other side of the first spring (306) is connected to the clamping block (315), and the second sliding rod (313) forms a mutual sliding structure with the second sliding groove (307) through the first spring (306).

5. The subway segment bolt structure according to claim 1, characterized in that: The other side of the second spring (308) is connected to the fixed block (309), and the first sliding rod (305) and the first sliding groove (302) form a mutual sliding structure through the second spring (308).

6. The subway segment bolt structure according to claim 1, characterized in that: The sliding block (312) is located between the fixing block (309) and the limiting block (310), and the other side of the third spring (314) is connected to the sliding block (312).

7. The subway segment bolt structure according to claim 1, characterized in that: The button (311) is arranged on the outside of the nut (2), and the slider (312) forms a mutually sliding structure with the first slider (305) via a third spring (314).

8. The subway segment bolt structure according to claim 1, characterized in that: The first spring (306) is arranged outside the second sliding rod (313), and the second spring (308) and the third spring (314) are arranged outside the first sliding rod (305).

9. The subway segment bolt structure according to claim 1, characterized in that: The spray mechanism (4) comprises a connecting sleeve (401), a connecting groove (402), a feed port (403), a material storage ring (404) and a protective cover (405); the surface of the nut (2) is fixedly connected with the connecting sleeve (401); the surface of the nut (2) is provided with a connecting groove (402); one end of the connecting sleeve (401) is provided with a feed port (403); one side of the feed port (403) is provided with a material storage ring (404); and the surface of the feed port (403) is threadedly connected with the protective cover (405).

10. The subway segment bolt structure according to claim 9, characterized in that: One side of the communication groove (402) is connected to a material storage ring (404), and the material storage rings (404) are distributed at equal intervals on the nut (2).

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