Fabricated building wall connecting structure

Abstract

The invention relates to the technical field of constructional engineering, in particular to a fabricated building wall connecting structure which comprises a first connecting part, a wall body is arranged on the surface of the first connecting part, and the first connecting part is embedded in the wall body in advance; the top of the first connecting part is provided with the second connecting part; and the number of the second connecting parts is two. In the invention, through meshing between the arranged meshing block and the inner ratchet gear, the nut is loosened, and the insertion rod is always in a fixed state, but through the arranged meshing block and the inner ratchet gear, when the meshing block rotates forwards, the inner ratchet gear does not cause matching interference on the meshing block, which represents that the insertion rod can move along with vibration of the nut; and the meshing position of the meshing block and the inner ratchet gear is made of rubber, so that the inner ratchet gear is prevented from being abraded when the meshing block rotates.

Description

Technical Field

[0001] The present invention relates to the technical field of construction engineering, and particularly to a connecting structure for prefabricated building walls. Background Art

[0002] With the rapid development of the construction industry, prefabricated buildings have received increasing attention due to their high efficiency and environmental protection characteristics. Although traditional cast-in-place concrete buildings have good integrity and durability, they have significant limitations in terms of construction speed and cost. In recent years, prefabricated buildings have gradually become the mainstream trend, and the design of the connecting structure of the walls is particularly important. The existing connecting structures for prefabricated walls mainly include various forms such as welding, bolt connection, and snap connection. These connection methods have their own advantages, but there are also some problems.

[0003] Welding connection: The prefabricated components are firmly welded together through welding rods to form a stable connection structure. The advantage is high connection strength, but the welding process is complex, requiring professional equipment and technicians, and it is not easy to disassemble, which is not conducive to later maintenance and renovation; Bolt connection: High-strength bolts are used to fix the prefabricated components together, which is convenient for on-site assembly and disassembly. The advantages are simple operation and good flexibility, but it is easy to loosen during long-term use, affecting the structural stability; Snap connection: The rapid assembly of the wall is realized through a specially designed snap device. This connection method is fast and suitable for large-scale production, but the load-bearing capacity is limited and the safety is relatively low.

[0004] Although the above several connection methods meet the requirements of prefabricated buildings to a certain extent, there are still obvious deficiencies. When encountering vibrations after connection, the fixing methods of bolt connection and snap connection are extremely easy to loosen, and in rainy weather, moisture will enter the wall from the gaps at the connection, resulting in the interior of the wall being wet. Bolts will also rust in a long-term wet environment, affecting the structural strength of the connecting parts. Summary of the Invention

[0005] Therefore, the present invention provides a connecting structure for prefabricated building walls to solve the above problems.

[0006] The present invention provides the following technical solution: A connecting structure for prefabricated building walls, including a first connecting component, on the surface of which there is a wall, and the first connecting component is pre-embedded inside the wall; A second connecting component, with the second connecting component installed on the top of the first connecting component; A third connecting component, the number of the second connecting components is two, and the third connecting component is installed inside the second connecting component, and the third connecting component is used to connect the two second connecting components.

[0007] As a preferred embodiment of the present invention, the second connecting member includes a connecting ring, the inner wall of the connecting ring is slidably connected to the surface of the first connecting member, the top of the connecting ring is fixedly connected with a fixed housing, the top of the fixed housing is penetrated and provided with a connecting hole, the hole wall of the connecting hole is fixedly connected with a limiting tube, the inner wall of the limiting tube is slidably connected with a threaded tube, the surface of the threaded tube is fixedly sleeved with a limiting ring, the surface of the limiting ring is slidably connected with the inner wall of the limiting tube, the top of the limiting ring is in contact with the top inside the limiting tube, the inside of the threaded tube is slidably connected with a plug rod, a key groove is opened on the inner wall of the threaded tube, a key block is fixedly connected to the surface of the plug rod, the groove wall of the key groove is slidably connected with the surface of the key block, and the top of the plug rod is fixedly connected with a limiting plate; The first connecting member includes an expansion tube, the surface of the expansion tube is slidably connected to the inner wall of the connecting ring, the top of the expansion tube is fixedly connected with a first sealing rubber ring, the top of the first sealing rubber ring is abutted against the bottom of the fixed housing, the surface of the plug rod is fixedly sleeved with an engaging block, the bottom inside the expansion tube is rotatably connected with a rotating ring, the bottom inside the expansion tube is rotatably connected with the bottom of the engaging block, the top of the rotating ring is fixedly connected with an internal ratchet gear, the inner wall of the internal ratchet gear is unidirectionally engaged with the surface of the engaging block, and the surface of the rotating ring is fixedly connected with a sweeping plate; The third connecting member includes a connecting plate, and a protective sleeve is fixedly sleeved on the surface of the connecting plate.

[0008] As a preferred embodiment of the present invention, the bottom of the internal ratchet gear is fixedly connected with a spring, and the bottom of the spring is fixedly connected with the bottom inside the expansion tube.

[0009] As a preferred embodiment of the present invention, the number of the sweeping plates is four, and the four sweeping plates are distributed in an annular array.

[0010] As a preferred embodiment of the present invention, the surface of the expansion tube is provided with connecting grooves, the number of the connecting grooves is several, three groups of the connecting grooves are distributed in a linear array, the upper connecting groove is located below the top of the sweeping plate, and the outer side of the sweeping plate is in contact with the inner wall of the expansion tube.

[0011] As a preferred embodiment of the present invention, the groove walls of the connecting grooves are filled with water-absorbing materials.

[0012] As a preferred embodiment of the present invention, a first limiting groove is formed on the inner wall of the fixed housing, a second limiting groove is formed on the groove wall of the first limiting groove, and a third limiting groove is formed on the groove wall of the second limiting groove. The groove wall of the first limiting groove is slidably connected to the surface of the connecting plate, the groove wall of the second limiting groove is slidably connected to the surface of the protective sleeve, a second sealing rubber ring is fixedly provided on the groove wall of the third limiting groove, an installation hole is formed on the top of the connecting plate, and the inner wall of the installation hole is slidably connected to the surface of the threaded pipe. A nut is threadedly sleeved on the surface of the threaded pipe.

[0013] As a preferred embodiment of the present invention, a buckle is provided on the surface of the fixed housing, a fixed sleeve is slidably connected to the surface of the fixed housing, a clamping groove is formed on the surface of the fixed sleeve, and the hook of the buckle is clamped with the groove wall of the clamping groove.

[0014] As a preferred embodiment of the present invention, the materials of the first connecting components are all stainless steel, and the inner and outer walls of the first connecting components are both galvanized.

[0015] As a preferred embodiment of the present invention, the threaded pipe and the nut are made of high-strength steel, and the surfaces of the threaded pipe and the nut are both nickel-plated.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: In the present invention, due to the meshing between the meshing block and the internal ratchet gear, when the nut becomes loose, the insertion rod must be in a stationary state. However, through the meshing block and the internal ratchet gear, when the meshing block rotates forward, the internal ratchet gear will not cause interference to the meshing block, which means that the insertion rod will move along with the vibration of the nut, so that the connection structure will not become loose. Moreover, the material at the meshing part of the meshing block and the internal ratchet gear is rubber, which can prevent the meshing block from wearing the internal ratchet gear when rotating. When the insertion rod rotates in reverse, the internal ratchet gear effectively limits the meshing block, making the nut tighten more and more. When the meshing block rotates in reverse, it will first drive the internal ratchet gear to rotate locally. When the moving range of the spring reaches the limit, the internal ratchet gear effectively limits the meshing block. After the nut stops vibrating, the spring resets and drives the rotating ring to rotate, so that the sweeping plate squeezes the water-absorbing material, causing water to flow out from the connecting groove, prolonging the service life of the water-absorbing material, and making the connection structure not easy to rust. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 Partial structure schematic diagram; Figure 3 For the present invention Figure 2 Partial structure sectional view; Figure 4 For the present inventionFigure 3 Cross-sectional view of the second connecting component structure in Figure 5 Schematic diagram of the structure of the first connecting component in the present invention; Figure 6 In the present invention Figure 5 Schematic diagram of the partial structure of the first connecting component Figure 1 ; Figure 7 In the present invention Figure 5 Schematic diagram of the partial structure of the first connecting component Figure 2 .

[0018] In the figure: 1. Second connecting component; 2. Third connecting component; 3. First connecting component; 4. Fixed sleeve; 5. Card slot; 101. Fixed outer shell; 102. Snap; 103. Connecting ring; 104. Second sealing rubber ring; 105. First limiting groove; 106. Second limiting groove; 107. Third limiting groove; 108. Connecting hole; 109. Limiting tube; 110. Nut; 111. Limiting plate; 112. Limiting ring; 113. Threaded tube; 114. Insert rod; 115. Engaging block; 201. Connecting plate; 202. Mounting hole; 203. Protective sleeve; 301. Expansion tube; 302. Connecting groove; 303. First sealing rubber ring; 304. Inner ratchet gear; 305. Sweeping plate; 306. Rotating ring; 307. Spring. Specific embodiments

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figures 1-7 The technical solutions provided by the present invention specifically include the following embodiments: Embodiment: An assembled building wall connection structure includes a first connecting component 3, a wall body is provided on the surface of the first connecting component 3, and the first connecting component 3 is pre-buried inside the wall body; A second connecting component 1, and the second connecting component 1 is installed on the top of the first connecting component 3; A third connecting component 2, the number of the second connecting components 1 is two, and the third connecting component 2 is installed inside the second connecting component 1, and the third connecting component 2 is used to connect the two second connecting components 1.

[0021] The second connecting member 1 includes a connecting ring 103. The inner wall of the connecting ring 103 is slidably connected to the surface of the first connecting member 3. The top of the connecting ring 103 is fixedly connected with a fixed outer shell 101. A connecting hole 108 is penetrated through the top of the fixed outer shell 101. The inner wall of the connecting hole 108 is fixedly connected with a limiting tube 109. A threaded tube 113 is slidably connected to the inner wall of the limiting tube 109. A limiting ring 112 is fixedly sleeved on the surface of the threaded tube 113. The surface of the limiting ring 112 is slidably connected to the inner wall of the limiting tube 109. The top of the limiting ring 112 is in contact with the inner top of the limiting tube 109. A plug rod 114 is slidably connected to the inside of the threaded tube 113. A key groove is formed in the inner wall of the threaded tube 113. A key block is fixedly connected to the surface of the plug rod 114. The slot wall of the key groove is slidably connected to the surface of the key block. The top of the plug rod 114 is fixedly connected with a limiting plate 111; By inserting the two fixed outer shells 101 on the surface of the connecting plate 201 and pre-burying the two expansion tubes 301 inside the two walls to be connected. At this time, the upper half of the expansion tube 301 is located outside the wall. Then, the connecting ring 103 is sleeved on the upper half of the expansion tube 301. The connecting ring 103 slides along the expansion tube 301 until it fits against the surface of the wall. At this time, the bottom of the fixed outer shell 101 abuts against the top of the first sealing ring 303, completing the sealing between the connecting ring 103 and the expansion tube 301, preventing rainwater from entering the inside of the expansion tube 301. The connecting ring 103 also shields the gap between the expansion tube 301 and the wall, and water is also difficult to enter through the gap formed by the wall and the expansion tube 301, preventing corrosion of the first connecting member 3 and the second connecting member 1 and extending the service life of the connecting structure. And when there is water seepage inside the wall due to climate reasons, some water vapor will adhere to the water-absorbing material provided on the slot wall of the first sealing ring 303, preventing the water vapor from condensing and entering the inside of the expansion tube 301, which may cause rust of the expansion tube 301. After the fixed outer shell 101 is assembled, at this time, the threaded tube 113 and the plug rod 114 pass through the mounting hole 202, and by tightening the nut 110, the connection between the two walls is completed.

[0022] The first connecting component 3 includes an expansion tube 301. The surface of the expansion tube 301 is slidably connected to the inner wall of the connecting ring 103. A first sealing rubber ring 303 is fixedly connected to the top of the expansion tube 301. The top of the first sealing rubber ring 303 abuts against the bottom of the fixed outer shell 101. An engaging block 115 is fixedly sleeved on the surface of the insertion rod 114. The bottom inside the expansion tube 301 is rotatably connected to a rotating ring 306. The bottom inside the expansion tube 301 is rotatably connected to the bottom of the engaging block 115. An internal ratchet gear 304 is fixedly connected to the top of the rotating ring 306. The inner wall of the internal ratchet gear 304 is unidirectionally engaged with the surface of the engaging block 115. A sweeping plate 305 is fixedly connected to the surface of the rotating ring 306. A spring 307 is fixedly connected to the bottom of the internal ratchet gear 304. The bottom of the spring 307 is fixedly connected to the bottom inside the expansion tube 301. The number of sweeping plates 305 is four, and the four sweeping plates 305 are distributed in an annular array. Connecting grooves 302 are formed on the surface of the expansion tube 301. The number of connecting grooves 302 is several, and three groups of connecting grooves 302 are distributed in a linear array. The upper connecting grooves 302 are located below the top of the sweeping plates 305. The outer side of the sweeping plates 305 is in contact with the inner wall of the expansion tube 301. The groove walls of the connecting grooves 302 are filled with water-absorbing materials; Through the engagement between the provided engaging block 115 and the internal ratchet gear 304, when the nut 110 becomes loose, the insertion rod 114 must be in a stationary state. However, through the provided engaging block 115 and internal ratchet gear 304, when the engaging block 115 rotates forward, the internal ratchet gear 304 will not cause interference with the engaging block 115, which means the insertion rod 114 will move along with the vibration of the nut 110, so that the connection structure will not become loose. And the material at the engagement between the engaging block 115 and the internal ratchet gear 304 is rubber, which avoids abrasion of the internal ratchet gear 304 when the engaging block 115 rotates. When the insertion rod 114 rotates in reverse, the internal ratchet gear 304 effectively limits the engaging block 115, making the nut 110 only become tighter. When the engaging block 115 rotates in reverse, it will first drive the internal ratchet gear 304 to rotate locally. When the moving range of the spring 307 reaches the limit, the internal ratchet gear 304 effectively limits the engaging block 115. After the nut 110 stops vibrating, the spring 307 resets, driving the rotating ring 306 to rotate, so that the sweeping plates 305 squeeze the water-absorbing materials, causing water to flow out from the connecting grooves 302, prolonging the service life of the water-absorbing materials, and making the connection structure not easy to rust; The third connecting component 2 includes a connecting plate 201. A protective sleeve 203 is fixedly sleeved on the surface of the connecting plate 201. A first limiting groove 105 is formed in the inner wall of the fixed outer shell 101. A second limiting groove 106 is formed in the groove wall of the first limiting groove 105. A third limiting groove 107 is formed in the groove wall of the second limiting groove 106. The groove wall of the first limiting groove 105 is slidably connected to the surface of the connecting plate 201. The groove wall of the second limiting groove 106 is slidably connected to the surface of the protective sleeve 203. A second sealing rubber ring 104 is fixedly arranged on the groove wall of the third limiting groove 107. An installation hole 202 is formed in the top of the connecting plate 201. The inner wall of the installation hole 202 is slidably connected to the surface of the threaded pipe 113. A nut 110 is threadedly sleeved on the surface of the threaded pipe 113. A buckle 102 is arranged on the surface of the fixed outer shell 101. A fixed sleeve 4 is slidably connected to the surface of the fixed outer shell 101. A clamping groove 5 is formed in the surface of the fixed sleeve 4. The hook part of the buckle 102 is clamped with the groove wall of the clamping groove 5; By assembling the protective sleeve 203 and the connecting plate 201, through the arranged first limiting groove 105 and second limiting groove 106, the connecting plate 201 and the protective sleeve 203 are fixed inside the fixed outer shell 101. At this time, the connecting hole 108 and the installation hole 202 are concentric. Then the fixed sleeve 4 is buckled at the buckle 102, so that the fixed sleeve 4 limits the second sealing rubber ring 104, making it difficult for liquid to enter the gap between the fixed sleeve 4 and the protective sleeve 203, and improving the service life of the connecting piece.

[0023] The materials of the first connecting component 3 are all stainless steel, and the inner and outer walls of the first connecting component 3 are both treated by galvanizing.

[0024] The materials of the threaded pipe 113 and the nut 110 are high-strength steel, and the surfaces of the threaded pipe 113 and the nut 110 are both treated by nickel plating.

[0025] When assembling a wall connection structure of a prefabricated building according to this solution, first, the protective sleeve 203 and the connecting plate 201 are assembled. Through the provided first limiting groove 105 and second limiting groove 106, the connecting plate 201 and the protective sleeve 203 are fixed inside the fixed outer shell 101. At this time, the connection hole 108 and the installation hole 202 are concentric. Then, the fixing sleeve 4 is buckled at the buckle 102, so that the fixing sleeve 4 limits the second sealing rubber ring 104, making it difficult for liquid to enter the gap between the fixing sleeve 4 and the protective sleeve 203, improving the service life of the connecting piece. Then, the two fixed outer shells 101 are inserted on the surface of the connecting plate 201, and the two expansion tubes 301 are embedded inside the two walls to be connected. At this time, the upper half of the expansion tube 301 is located outside the wall. At this time, the connecting ring 103 is sleeved on the upper half of the expansion tube 301, and the connecting ring 103 slides along the expansion tube 301 until it fits with the surface of the wall. At this time, the bottom of the fixed outer shell 101 abuts against the top of the first sealing rubber ring 303, completing the sealing between the connecting ring 103 and the expansion tube 301, preventing rainwater from entering the inside of the expansion tube 301. The connecting ring 103 also blocks the gap between the expansion tube 301 and the wall, and it is also difficult for water to enter through the gap formed by the wall and the expansion tube 301, avoiding corrosion of the first connecting part 3 and the second connecting part 1 and extending the service life of the connection structure. And when water seepage occurs inside the wall due to climate reasons, part of the water vapor will adhere to the water-absorbing material provided on the groove wall of the first sealing rubber ring 303, preventing the water vapor from condensing and entering the inside of the expansion tube 301, so that the expansion tube 301 is corroded. After the fixed outer shell 101 is assembled, at this time, the threaded tube 113 and the plug rod 114 pass through the installation hole 202, and by tightening the nut 110, the connection between the two walls is completed; When the connecting structure encounters vibration, due to the meshing between the provided engaging block 115 and the internal ratchet gear 304, the nut 110 becomes loose. The insertion rod 114 must be in a stationary state. However, through the provided engaging block 115 and internal ratchet gear 304, when the engaging block 115 rotates forward, the internal ratchet gear 304 will not cause interference with the engaging block 115. This means that the insertion rod 114 will move along with the vibration of the nut 110, preventing the connecting structure from becoming loose. Moreover, the material at the meshing part of the engaging block 115 and the internal ratchet gear 304 is rubber, which avoids abrasion of the internal ratchet gear 304 when the engaging block 115 rotates. When the insertion rod 114 rotates in reverse, the internal ratchet gear 304 effectively limits the engaging block 115, making the nut 110 tighten more and more. When the engaging block 115 rotates in reverse, it will first drive the internal ratchet gear 304 to rotate locally. When the moving range of the spring 307 reaches the limit, the internal ratchet gear 304 effectively limits the engaging block 115. After the nut 110 stops vibrating, the spring 307 resets, driving the rotating ring 306 to rotate, causing the sweeping plate 305 to squeeze the water-absorbing material, making water flow out from the connecting groove 302, extending the service life of the water-absorbing material, and preventing the connecting structure from rusting easily.

[0026] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. An assembled building wall connection structure, characterized in that: It comprises a first connecting component (3), a wall is provided on the surface of the first connecting component (3), and the first connecting component (3) is pre-buried inside the wall; A second connecting component (1), the second connecting component (1) being mounted on the top of the first connecting component (3); A third connecting component (2), the number of the second connecting components (1) is two, a third connecting component (2) is installed inside the second connecting component (1), and the third connecting component (2) is used to connect the two second connecting components (1).

2. The assembled building wall connection structure according to claim 1, characterized in that: The second connecting component (1) comprises a connecting ring (103), the inner wall of the connecting ring (103) is slidably connected to the surface of the first connecting component (3), the top of the connecting ring (103) is fixedly connected to a fixed housing (101), the top of the fixed housing (101) is penetrated by a connecting hole (108), the hole wall of the connecting hole (108) is fixedly connected to a limiting tube (109), the inner wall of the limiting tube (109) is slidably connected to a threaded tube (113), and the surface of the threaded tube (113) is fixedly sleeved. A limiting ring (112) is provided, the surface of the limiting ring (112) is slidably connected to the inner wall of the limiting tube (109), the top of the limiting ring (112) contacts the top of the inside of the limiting tube (109), the inside of the threaded tube (113) is slidably connected to an insert rod (114), the inner wall of the threaded tube (113) is provided with a key groove, the surface of the insert rod (114) is fixedly connected to a key block, the groove wall of the key groove is slidably connected to the surface of the key block, and the top of the insert rod (114) is fixedly connected to a limiting plate (111); The first connecting component (3) comprises an expansion tube (301), the surface of the expansion tube (301) is slidably connected to the inner wall of the connecting ring (103), the top of the expansion tube (301) is fixedly connected to a first sealing rubber ring (303), the top of the first sealing rubber ring (303) is in contact with the bottom of the fixed shell (101), the surface of the insertion rod (114) is fixedly sleeved with an engagement block (115), the bottom of the inside of the expansion tube (301) is rotatably connected to a rotating ring (306), the bottom of the inside of the expansion tube (301) is rotatably connected to the bottom of the engagement block (115), the top of the rotating ring (306) is fixedly connected to an inner ratchet gear (304), the inner wall of the inner ratchet gear (304) is unidirectionally meshed with the surface of the engagement block (115), and the surface of the rotating ring (306) is fixedly connected to a sweep plate (305); The third connecting component (2) comprises a connecting plate (201), and a protective sleeve (203) is fixedly provided on the surface of the connecting plate (201).

3. The assembled building wall connection structure according to claim 2, characterized in that: A spring (307) is fixedly connected to the bottom of the inner ratchet gear (304), and the bottom of the spring (307) is fixedly connected to the bottom of the inside of the expansion tube (301).

4. The assembled building wall connection structure according to claim 2, characterized in that: The number of the sweeping plates (305) is four, and the four sweeping plates (305) are distributed in a ring array.

5. The assembled building wall connection structure according to claim 2, characterized in that: The surface of the expansion tube (301) is provided with connection grooves (302), the number of the connection grooves (302) is several, and three groups of the connection grooves (302) are distributed in a linear array, the upper connection grooves (302) are located at the lower side of the top of the sweeping plate (305), and the outer side of the sweeping plate (305) is in contact with the inner wall of the expansion tube (301).

6. The assembled building wall connection structure according to claim 5, characterized in that: The groove wall of the connecting groove (302) is filled with water-absorbing material.

7. The assembled building wall connection structure according to claim 2, characterized in that: The inner wall of the fixed housing (101) is provided with a first limiting groove (105), the groove wall of the first limiting groove (105) is provided with a second limiting groove (106), the groove wall of the second limiting groove (106) is provided with a third limiting groove (107), the groove wall of the first limiting groove (105) is slidably connected to the surface of the connecting plate (201), the groove wall of the second limiting groove (106) is slidably connected to the surface of the protective sleeve (203), the groove wall of the third limiting groove (107) is fixedly provided with a second sealing rubber ring (104), the top of the connecting plate (201) is provided with a mounting hole (202), the inner wall of the mounting hole (202) is slidably connected to the surface of a threaded tube (113), and a nut (110) is threadedly sleeved on the surface of the threaded tube (113).

8. The assembled building wall connection structure according to claim 7, characterized in that: A buckle (102) is provided on the surface of the fixed shell (101), a fixed sleeve (4) is slidably connected to the surface of the fixed shell (101), a slot (5) is provided on the surface of the fixed sleeve (4), and a slot wall of the slot (5) is engaged with a hook of the buckle (102).

9. The assembled building wall connection structure according to claim 1, characterized in that: The material of the first connecting component (3) is stainless steel, and the inner and outer walls of the first connecting component (3) are galvanized.

10. The assembled building wall connection structure according to claim 7, characterized in that: The threaded tube (113) and the nut (110) are made of high-strength steel, and the surfaces of the threaded tube (113) and the nut (110) are both nickel-plated.

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