A detachable cable reel

Abstract

The utility model discloses a kind of cable reel of detachable sub-disc, including the first disc body and second disc body of parallel interval arrangement, first disc body and second disc body are connected with cylinder, form the cable reel of whole, still include third disc body and connecting assembly, third disc body is detachably connected on second disc body;Wire slot A is opened on second disc body;Connecting assembly is arranged in second disc body and third disc body;Connecting assembly includes connecting female piece and connecting male piece, connecting female piece includes at least two groups, at least two groups of connecting female piece are spaced apart on second disc body along circumferential direction;Connecting male piece includes at least two groups, at least two groups of connecting male piece are spaced apart on third disc body along circumferential direction.The utility model uses detachable sub-disc structure, and the increase or reduction of winding space is realized by disassembling and assembling sub-disc, using screw-in type buckling connection mode, realize sub-disc quick disassembly, improve disassembly efficiency, and have disc body anti-loose function.

Description

Technical Field

[0001] This utility model relates to the field of winding reel molds, and specifically to a cable reel with a detachable sub-reel. Background Technology

[0002] Cables are a fundamental raw material in fields such as power and communications. During the production process, manufactured cables need to be wound onto cable reels for storage and transportation. Cable reels are a common tool used for winding cables. Cable reels are generally made of plastic and are typically manufactured using injection molding. A cable reel consists of an upper reel and a lower reel spaced apart, connected by a cylindrical structure. The upper and lower reels, along with the external space of the cylindrical structure, form a winding space for winding cables. The middle of the cylindrical structure is open from top to bottom.

[0003] Existing cable reels include single-winding-space and multi-winding-space types. Single-winding-space reels include upper and lower reels and a cylindrical body, while multi-winding-space reels also include a sub-reel inserted between the upper and lower reels. The sub-reel can divide the winding space into two independent winding spaces along the axial direction. In practical use, it is often necessary to switch between the two types of cable reels. However, existing cable reels have a fixed structure, and single-winding-space cable reels cannot be switched to multi-winding-space cable reels. Therefore, it is necessary to design a cable reel with a detachable sub-reel to achieve the switching between single-winding-space and multi-winding-space in practical use. Utility Model Content

[0004] The technical problem to be solved by this utility model is to address the shortcomings of the prior art by providing a cable reel with a detachable sub-reel structure. The winding space can be increased or decreased by assembling and disassembling the sub-reel. The sub-reel is connected by a screw-in fastening method, which enables quick assembly and disassembly of the sub-reel, improves assembly and disassembly efficiency, and has a reel body anti-loosening function.

[0005] The technical solution adopted by this utility model is as follows: A cable reel with a detachable sub-reel includes a first reel and a second reel arranged in parallel and spaced apart, with a cylindrical body connecting the first and second reels to form an integral cable reel. It also includes a third reel and a connecting assembly. The third reel is detachably connected to the second reel. A first winding space is formed between the first and second reels, and a second winding space is formed between the second and third reels. A wire groove is provided on the second reel for the cable to pass through the first and second winding spaces. The connecting assembly is disposed on the second and third reels for connecting them. The connecting assembly includes a connecting female and a connecting male. The connecting female includes at least two sets, which are spaced apart along the circumferential direction on the second reel. The connecting male includes at least two sets, which are spaced apart along the circumferential direction on the third reel. After the at least two sets of connecting males and females are correspondingly arranged, the second and third reels are interlocked by relative rotation.

[0006] Preferably, the third disc body includes a disc surface and a disc cylinder, wherein the disc surface is a circular plate structure; the disc cylinder is a cylindrical structure, the disc cylinder is connected to the side wall of the disc surface, and is coaxially arranged with the disc surface.

[0007] Preferably, the cylinder body is provided with an inner support cylinder, which is coaxially arranged with the cylinder body; the inner support cylinder and the cylinder body are connected by an inner support, which includes at least two inner supports, which are spaced apart along the circumferential direction.

[0008] Preferably, the connecting female component includes a first snap groove, a second snap groove, a through groove, a first groove support plate, and a second groove support plate, wherein the first snap groove is formed on the inner support and extends along the inner edge of the second disc body; the first groove support plate is recessed within the first snap groove; the second snap groove is located on the side of the first snap groove and communicates with the first snap groove, and extends along the inner edge of the second disc body; the second groove support plate is recessed within the second snap groove; and the through groove is located between the first snap groove and the second snap groove.

[0009] Preferably, the connecting component includes a fastener; the fastener is an L-shaped block structure, and the fastener is disposed on the side wall of the disc cylinder. After the fastener extends into the first fastening groove, the second disc and the third disc rotate relative to each other, so that the fastener passes through the through groove and fastens into the second fastening groove.

[0010] Preferably, it further includes an anti-loosening component, which includes an anti-loosening protrusion and an anti-loosening recess; the anti-loosening protrusion is disposed on the third disc body; the anti-loosening recess is disposed on the second disc body; when the third disc body is screwed into and fastened to the second disc body, the anti-loosening protrusion is embedded in the anti-loosening recess.

[0011] Preferably, the cylinder is provided with an inner support plate, which is disposed inside the cylinder to support the cylinder; the inner support plate is correspondingly disposed on the inner ring of the first disc and the second disc.

[0012] Preferably, the connecting female component includes a third snap groove, a sliding groove, a third groove support plate, and an anti-loosening component, wherein the third snap groove is formed on the inner support plate and extends along the inner edge of the second disc; the sliding groove is disposed on the side of the third snap groove and communicates with the third snap groove, and extends along the inner edge of the second disc; the third groove support plate is recessed into the sliding groove.

[0013] Preferably, the anti-loosening component includes an anti-loosening protrusion and an anti-loosening recess, wherein the anti-loosening recess is disposed on the third groove support plate and is recessed inward; the anti-loosening protrusion is disposed on the end wall of the disc and protrudes outward; when the third disc is screwed into and fastened to the second disc, the anti-loosening protrusion is embedded in the anti-loosening recess.

[0014] Preferably, the connecting component includes a fastener; the fastener is disposed on the side wall of the disc cylinder; after the fastener is embedded in the third fastening groove, the fastener slides into the sliding groove by rotating the second disc body and the third disc body relative to each other; when the second disc body and the third disc body are rotated in the forward direction, the anti-loosening protrusion slides into the anti-loosening recess, limiting and preventing loosening; when the second disc body and the third disc body are rotated in the reverse direction and the third disc body is disassembled, the anti-loosening protrusion slides out of the anti-loosening recess, and the fastener slides out of the third fastening groove, and the third disc body separates from the second disc body.

[0015] The beneficial effects of this utility model are as follows: This utility model addresses the shortcomings and deficiencies of existing technologies by independently developing and designing a detachable sub-reel structure. By assembling and disassembling the sub-reel, the winding space can be increased or decreased. The screw-in fastening connection method enables quick assembly and disassembly of the sub-reel, improving assembly and disassembly efficiency. It also features a removable sub-reel cable reel with an anti-loosening function.

[0016] This invention addresses the problem of switching the winding space of a cable reel, aiming to enable rapid switching of the cable reel's winding space during actual operation to adapt to different processing scenarios, improve the application scenarios of a single cable reel, and reduce the cost of using the cable reel. Specifically, this utility model includes a cylindrical body and a first disc and a second disc arranged parallel to each other at both ends of the cylindrical body. A single winding space is formed between the first disc and the second disc. To facilitate the cable passing back and forth between different winding spaces after switching to multiple winding spaces, the second disc is used as the connection point of the auxiliary disc. In practical applications, the first disc can also be used as the connection point. The surface of the second disc has a wire groove for cable insertion. A connecting female component is provided on the second disc. At the same time, a third disc that can be detachably installed externally serves as an auxiliary disc. A connecting female component is provided on the third disc. When multiple winding spaces are needed, the third disc is quickly installed onto the second disc by connecting the connecting female component and the connecting female component, thereby forming a second winding space between the second disc and the third disc. Similarly, when more than two winding spaces are needed, a connecting female component can also be provided on the third disc to connect to an external fourth disc.

[0017] Furthermore, the third disc of this utility model includes a circular plate-shaped disc surface and a disc cylinder connected to the end wall of the disc surface. The disc cylinder is axially aligned with the cylinder body, and multiple L-shaped fasteners are provided on its side wall along the circumferential direction as connecting components. In one technical solution of this utility model, an inner support cylinder is provided coaxially inside the cylinder body, and multiple fan-shaped inner supports are provided between the inner support cylinder and the cylinder body along the circumferential direction. A first fastening groove is provided on the inner support, and a recessed first groove support plate is provided inside the first fastening groove. A second fastening groove is connected to the side of the first fastening groove, and a recessed second groove support plate is provided inside the second fastening groove. The first fastening groove and the second fastening groove are connected by a through groove, and the width of the second fastening groove is greater than that of the first fastening groove. After the fastener is inserted from the first fastening groove, by rotating the second disc body and the third disc body relative to each other, the L-shaped fastener is screwed into the second fastening groove, thereby quickly connecting the third disc body to the second disc body to form a cable reel with a double winding space. In another technical solution of this utility model, an inner support plate is provided inside the cylinder corresponding to the first and second discs as a connecting and load-bearing reinforcement component. At the same time, multiple sets of connecting female parts are provided on the inner support plate along the circumferential direction. The connecting female parts include a third fastening groove opened on the inner support plate and a sliding groove connected to the side of the third fastening groove. The width of the third fastening groove is greater than the width of the sliding groove. The sliding groove is provided with an inwardly recessed third groove support plate. The third groove support plate is also provided with an outwardly protruding anti-loosening protrusion. After the fastening block set on the third disc is inserted into the third fastening groove, the L-shaped fastening block slides into the sliding groove by rotating the second and third discs relative to each other, and passes through the anti-loosening protrusion to fasten the third and second discs. The anti-loosening protrusion can be a hemispherical protrusion structure, which can effectively prevent the fastening block in the sliding groove from sliding out and causing connection failure. Attached Figure Description

[0018] Figure 1 This is one of the component disassembly diagrams of Embodiment 1 of this utility model.

[0019] Figure 2 This is the second schematic diagram of the component disassembly structure of Embodiment 1 of this utility model.

[0020] Figure 3 This is one of the three-dimensional structural schematic diagrams of Embodiment 1 of this utility model.

[0021] Figure 4 This is a second three-dimensional structural schematic diagram of Embodiment 1 of this utility model.

[0022] Figure 5 for Figure 4 Enlarged structural diagram at point I.

[0023] Figure 6 This is a three-dimensional structural diagram of the third disc body in Embodiment 1 of this utility model.

[0024] Figure 7 This is one of the component disassembly diagrams of Embodiment 2 of this utility model.

[0025] Figure 8 This is the second schematic diagram of the component disassembly structure of Embodiment 2 of this utility model.

[0026] Figure 9 This is a three-dimensional structural diagram of the second disc body in Embodiment 2 of this utility model.

[0027] Figure 10 for Figure 9 Enlarged structural diagram at point II.

[0028] Figure 11 This is a three-dimensional structural diagram of the third disc body in Embodiment 2 of this utility model.

[0029] In the diagram: 1. Cylinder; 2. First disc; 3. Second disc; 4. Inner support cylinder; 5. Inner support; 6. Third disc; 7. First groove support plate; 8. Second groove support plate; A. Cable groove; B. First snap groove; C. Second snap groove; D. Through groove; 61. Plate surface; 62. Plate cylinder; 63. Buckle block; 9. Inner support plate; 10. Third groove support plate; 11. Anti-loosening recess; 12. Anti-loosening protrusion; E. Third fastening groove; F. Sliding groove. Detailed Implementation

[0030] The present invention will now be further described with reference to the accompanying drawings: Example 1

[0031] like Figures 1 to 6As shown, the technical solution adopted in this embodiment is as follows: A cable reel with a detachable sub-reel includes a first reel body 2 and a second reel body 3 arranged in parallel at intervals. A cylindrical body 1 connects the first reel body 2 and the second reel body 3 to form an integral cable reel. It also includes a third reel body 6 and connecting components. The third reel body 6 is detachably connected to the second reel body 3. A first winding space is formed between the first reel body 2 and the second reel body 3, and a second winding space is formed between the second reel body 3 and the third reel body 6. A wire groove A is provided on the second reel body 3 for the cable to pass through the first winding space and the second winding space. The line passes through the space; the connecting component is disposed on the second disk 3 and the third disk 6 for connecting the second disk 3 and the third disk 6; the connecting component includes a connecting female and a connecting female, wherein the connecting female includes at least two sets, and the at least two sets of connecting females are spaced apart along the circumferential direction on the second disk 3; the connecting female includes at least two sets, and the at least two sets of connecting females are spaced apart along the circumferential direction on the third disk 6; after the at least two sets of connecting females and connecting females are correspondingly disposed, the second disk 3 and the third disk 6 are connected to each other by relative rotation.

[0032] The third disc body 6 includes a disc surface 61 and a disc cylinder 62, wherein the disc surface 61 is a circular plate structure; the disc cylinder 62 is a cylindrical structure, the disc cylinder 62 is connected to the side wall of the disc surface 61, and is coaxially arranged with the disc surface 61.

[0033] The cylinder 1 is provided with an inner support cylinder 4, which is coaxially arranged with the cylinder 1; the inner support cylinder 4 is connected to the cylinder 1 by an inner support 5, and the inner support 5 includes at least two inner supports 5, which are spaced apart along the circumferential direction.

[0034] The connecting female component includes a first snap groove B, a second snap groove C, a through groove D, a first groove support plate 7, and a second groove support plate 8. The first snap groove B is formed on the inner support 5 and extends along the inner edge of the second disc body 3. The first groove support plate 7 is recessed within the first snap groove B. The second snap groove C is located on the side of the first snap groove B and communicates with the first snap groove B, extending along the inner edge of the second disc body 3. The second groove support plate 8 is recessed within the second snap groove C. The through groove D is located between the first snap groove B and the second snap groove C.

[0035] The connecting component includes a fastener 63; the fastener 63 is an L-shaped block structure and is disposed on the side wall of the disc cylinder 62. After the fastener 63 extends into the first fastening groove B, the second disc body 3 and the third disc body 6 rotate relative to each other, so that the fastener 63 passes through the through groove D and fastens into the second fastening groove C.

[0036] It also includes an anti-loosening component, which includes an anti-loosening protrusion and an anti-loosening recess; the anti-loosening protrusion is disposed on the third disc 6; the anti-loosening recess is disposed on the second disc 3; when the third disc 6 is screwed into and fastened to the second disc 3, the anti-loosening protrusion is embedded in the anti-loosening recess.

[0037] Furthermore, this utility model designs a detachable sub-reel structure, which increases or decreases the winding space by assembling and disassembling the sub-reel. It adopts a screw-in fastening connection method to achieve quick assembly and disassembly of the sub-reel, improves assembly and disassembly efficiency, and has a removable sub-reel anti-loosening function.

[0038] This invention addresses the problem of switching the winding space of a cable reel, aiming to enable rapid switching of the cable reel's winding space during actual operation to adapt to different processing scenarios, improve the application scenarios of a single cable reel, and reduce the cost of using the cable reel. Specifically, this utility model includes a cylindrical body and a first disc and a second disc arranged parallel to each other at both ends of the cylindrical body. A single winding space is formed between the first disc and the second disc. To facilitate the cable passing back and forth between different winding spaces after switching to multiple winding spaces, the second disc is used as the connection point of the auxiliary disc. In practical applications, the first disc can also be used as the connection point. The surface of the second disc has a wire groove for cable insertion. A connecting female component is provided on the second disc. At the same time, a third disc that can be detachably installed externally serves as an auxiliary disc. A connecting female component is provided on the third disc. When multiple winding spaces are needed, the third disc is quickly installed onto the second disc by connecting the connecting female component and the connecting female component, thereby forming a second winding space between the second disc and the third disc. Similarly, when more than two winding spaces are needed, a connecting female component can also be provided on the third disc to connect to an external fourth disc.

[0039] Furthermore, the third disc of this utility model includes a circular plate-shaped disc surface and a disc cylinder connected to the end wall of the disc surface. The disc cylinder is axially aligned with the cylinder body, and multiple L-shaped fasteners are provided on its side wall along the circumferential direction as connecting components. In this embodiment, an inner support cylinder is provided coaxially inside the cylinder body, and multiple fan-shaped inner supports are provided between the inner support cylinder and the cylinder body along the circumferential direction. A first fastening groove is provided on the inner support, and a recessed first groove support plate is provided inside the first fastening groove. A second fastening groove is connected to the side of the first fastening groove, and a recessed second groove support plate is provided inside the second fastening groove. The first fastening groove and the second fastening groove are connected by a through groove, and the width of the second fastening groove is greater than that of the first fastening groove. After the fastener is inserted from the first fastening groove, by rotating the second disc body and the third disc body relative to each other, the L-shaped fastener is screwed into the second fastening groove, thereby quickly connecting the third disc body to the second disc body to form a cable reel with a double winding space. Example 2

[0040] like Figures 7 to 11As shown, as an embodiment of the present invention, the difference between this embodiment and embodiment 1 is that the combined structure of the inner support cylinder 4 and the inner support 5 is replaced with the structure of the inner support plate 9; at the same time, the assembly method of the third plate 6 being assembled onto the second plate 3 is different, that is, the structure of the connecting mother is different.

[0041] The cylinder 1 is provided with an inner support plate 9, which is located inside the cylinder 1 and is used to support the cylinder 1; the inner support plate 9 is correspondingly located in the inner ring of the first disc 2 and the second disc 3.

[0042] The connecting female component includes a third snap groove E, a sliding groove F, a third groove support plate 10, and an anti-loosening component. The third snap groove E is formed on the inner support plate 9 and extends along the inner edge of the second disc body 3. The sliding groove F is disposed on the side of the third snap groove E and communicates with the third snap groove E, and extends along the inner edge of the second disc body 3. The third groove support plate 10 is recessed into the sliding groove F.

[0043] The anti-loosening component includes an anti-loosening protrusion 12 and an anti-loosening recess 11. The anti-loosening recess 11 is disposed on the third groove support plate 10 and is recessed inward. The anti-loosening protrusion 12 is disposed on the end wall of the disc 62 and protrudes outward. When the third disc 6 is screwed into and fastened to the second disc 3, the anti-loosening protrusion 12 is embedded in the anti-loosening recess 11.

[0044] The connecting component includes a fastener 63; the fastener 63 is disposed on the side wall of the disc cylinder 62; after the fastener 63 is embedded in the third fastening groove E, the fastener 63 slides into the sliding groove F by rotating the second disc body 3 and the third disc body 6 relative to each other; when the second disc body 3 and the third disc body 6 are rotated in the forward direction, the anti-loosening protrusion 12 slides into the anti-loosening recess 11, limiting and preventing loosening; when the second disc body 3 and the third disc body 6 are rotated in the reverse direction and the third disc 6 is disassembled, the anti-loosening protrusion 12 slides out of the anti-loosening recess 11, and the fastener 63 slides out of the third fastening groove E, and the third disc body 6 separates from the second disc body 3.

[0045] Furthermore, the third disc of this utility model includes a disc surface with a circular plate structure and a disc cylinder connected to the end wall of the disc surface. The disc cylinder is axially aligned with the cylinder body, and multiple L-shaped fasteners are provided on its side wall along the circumferential direction as connecting parts. In this embodiment, an inner support plate is provided inside the cylinder corresponding to the first and second discs as a connecting and load-bearing reinforcement component. At the same time, multiple sets of connecting female parts are provided on the inner support plate along the circumferential direction. The connecting female parts include a third fastening groove formed on the inner support plate and a sliding groove connected to the side of the third fastening groove. The width of the third fastening groove is greater than the width of the sliding groove. The sliding groove has an inwardly recessed third groove support plate. The third groove support plate also has an outwardly protruding anti-loosening protrusion. After the fastening block set on the third disc is inserted into the third fastening groove, the L-shaped fastening block slides into the sliding groove by relatively rotating the second and third discs, and passes through the anti-loosening protrusion to fasten the third and second discs. The anti-loosening protrusion can be a hemispherical protrusion structure, which can effectively prevent the fastening block in the sliding groove from sliding out and causing connection failure.

[0046] The embodiments of this utility model are merely illustrative of specific implementation methods and are not intended to limit its scope of protection. Those skilled in the art can make certain modifications based on the inspiration provided by these embodiments; therefore, all equivalent changes or modifications made in accordance with the scope of this utility model patent are within the scope of the claims of this utility model patent.

Claims

1. A cable reel with a detachable secondary reel, comprising a first reel body (2) and a second reel body (3) arranged in parallel at intervals, wherein a cylindrical body (1) is connected between the first reel body (2) and the second reel body (3) to form an integral cable reel, characterized in that: It also includes a third disk body (6) and connecting components, wherein, The third disc (6) is detachably connected to the second disc (3). A first winding space is formed between the first disc (2) and the second disc (3), and a second winding space is formed between the second disc (3) and the third disc (6). A wire groove (A) is provided on the second disc (3) for the cable to pass through the first winding space and the second winding space. The connecting component is disposed on the second disk body (3) and the third disk body (6) for connecting the second disk body (3) and the third disk body (6). The connecting assembly includes a connecting female component and connecting female components. The connecting female component includes at least two sets, which are spaced apart on the second disc (3) along the circumferential direction. The connecting female component includes at least two sets, which are spaced apart on the third disc (6) along the circumferential direction. After the at least two sets of connecting female components are correspondingly arranged with the connecting female component, the two are connected to each other by rotating the second disc (3) and the third disc (6) relative to each other.

2. The cable reel with a detachable auxiliary reel according to claim 1, characterized in that: The third disc (6) includes a disc surface (61) and a disc cylinder (62), wherein the disc surface (61) is a circular plate structure; the disc cylinder (62) is a cylindrical structure, the disc cylinder (62) is connected to the side wall of the disc surface (61) and is coaxially arranged with the disc surface (61).

3. The cable reel with a detachable auxiliary reel according to claim 2, characterized in that: The cylinder (1) is provided with an inner support cylinder (4), which is coaxially arranged with the cylinder (1); the inner support cylinder (4) is connected to the cylinder (1) by an inner support (5), and the inner support (5) includes at least two, which are spaced apart along the circumferential direction.

4. A detachable cable reel according to claim 3, characterized in that: The connecting female component includes a first snap groove (B), a second snap groove (C), a through groove (D), a first groove support plate (7), and a second groove support plate (8). The first snap groove (B) is formed on the inner support (5) and extends along the inner edge of the second disc body (3). The first groove support plate (7) is recessed in the first snap groove (B). The second snap groove (C) is located on the side of the first snap groove (B) and communicates with the first snap groove (B). The second snap groove (C) extends along the inner edge of the second disc body (3). The second groove support plate (8) is recessed in the second snap groove (C). The through groove (D) is located between the first snap groove (B) and the second snap groove (C).

5. A detachable cable reel according to claim 4, characterized in that: The connecting component includes a fastener (63); the fastener (63) is an L-shaped block structure, and the fastener (63) is set on the side wall of the disc cylinder (62). After the fastener (63) extends into the first fastening groove (B), the second disc body (3) and the third disc body (6) rotate relative to each other, so that the fastener (63) passes through the through groove (D) and fastens into the second fastening groove (C).

6. A detachable cable reel according to claim 1, characterized in that: It also includes an anti-loosening component, which includes an anti-loosening protrusion and an anti-loosening recess; the anti-loosening protrusion is disposed on the third disc (6); the anti-loosening recess is disposed on the second disc (3); when the third disc (6) is screwed into and fastened to the second disc (3), the anti-loosening protrusion is embedded in the anti-loosening recess.

7. A detachable cable reel according to claims 2 to 1, characterized in that: The cylinder (1) is provided with an inner support plate (9), which is located inside the cylinder (1) and is used to support the cylinder (1); the inner support plate (9) is correspondingly located in the inner ring of the first disc (2) and the second disc (3).

8. A detachable cable reel according to claim 7, characterized in that: The connecting female component includes a third snap groove (E), a sliding groove (F), a third groove support plate (10), and an anti-loosening component. The third snap groove (E) is opened on the inner support plate (9) and extends along the inner edge of the second disc body (3). The sliding groove (F) is provided on the side of the third snap groove (E) and communicates with the third snap groove (E), and extends along the inner edge of the second disc body (3). The third groove support plate (10) is recessed in the sliding groove (F).

9. A detachable cable reel according to claim 8, characterized in that: The anti-loosening component includes an anti-loosening protrusion (12) and an anti-loosening recess (11). The anti-loosening recess (11) is disposed on the third groove support plate (10) and is recessed inward. The anti-loosening protrusion (12) is disposed on the end wall of the disc (62) and protrudes outward. When the third disc (6) is screwed into and fastened to the second disc (3), the anti-loosening protrusion (12) is embedded in the anti-loosening recess (11).

10. A detachable cable reel according to claim 7, characterized in that: The connecting component includes a fastener (63); the fastener (63) is disposed on the side wall of the disc cylinder (62); after the fastener (63) is embedded in the third fastening groove (E), the fastener (63) slides into the sliding groove (F) by rotating the second disc body (3) and the third disc body (6) relative to each other; when the second disc body (3) and the third disc body (6) are rotated in the forward direction, the anti-loosening protrusion (12) slides into the anti-loosening recess (11), which limits and prevents loosening; when the second disc body (3) and the third disc body (6) are rotated in the reverse direction and the third disc (6) is disassembled, the anti-loosening protrusion (12) slides out of the anti-loosening recess (11), and the fastener (63) slides out of the third fastening groove (E), and the third disc body (6) separates from the second disc body (3).

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