Single nut matched with inner sleeve type extrusion loosening nut

Abstract

The utility model discloses a single nut matched with an inner sleeve type extrusion loosening nut which comprises a nut body, a channel is formed in the bottom of the inner side of the nut body, an inner thread bushing is movably embedded in the channel, a screw hole is formed in the middle of the inner side of the nut body, and a cover cylinder is arranged at the top of the nut body. The bottom end of the cover cylinder is fixedly connected with a bottom ring, the top end of the bottom ring is fixedly connected with a sealing ring, a circular plate is arranged in the cover cylinder, the top of the circular plate is provided with a spring, and the bottom end of the nut body is fixedly connected with an outer ring. By arranging a series of structures, the probability that the gasket pushes the internal thread bushing to be misplaced can be reduced, so that the internal thread bushing can be smoothly extruded and keeps the meshing relation of the female thread and the male thread with the screw rod, and the internal thread bushing can play a better anti-loosening role; therefore, the probability of thread rusting at the joint of the nut and the screw is reduced, and subsequent disassembly of the nut and the screw is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of nuts, in particular to a single nut with an inner sleeve type extrusion relaxation nut. Background Technique

[0002] Threaded connections are widely used in catenary components such as nuts and screws, and have the advantages of simple structure, reliable connection, and convenient disassembly and assembly. With the development of industrial technology, the connection requirements for threaded connection components are getting higher and higher, especially for nuts and screws used in specific occasions.

[0003] When the existing single nut with an inner sleeve type extrusion nut is in use, it is usually locked and loosened by the screw extruding the inner lining threaded sleeve inside the nut and forming male and female threads with the threads on the screw, and a gasket needs to be used for padding. When the nut is tightened, since the gasket is not fixed to the bottom surface of the nut, the gasket will shift as the nut is tightened, resulting in the bottom end of the inner lining sleeve being easily pushed out of position due to the shift of the gasket, so that the threads on the inner threaded bushing cannot form male and female thread engagement with the screw when the screw is continuously rotated, causing the inner threaded bushing to fail to play a better anti-loosening role; in addition, after the existing nut is tightly engaged with the screw thread, the junction of the screw end and the nut is usually exposed to the outside, subject to rain and sun, making the threads at the junction of the screw and the nut prone to rust, which is not conducive to the subsequent disassembly of the nut from the screw. Content of the Utility Model

[0004] The purpose of the utility model is to provide a single nut with an inner sleeve type extrusion relaxation nut to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A single nut with an inner sleeve type extrusion relaxation nut, including a nut body, a channel is opened at the bottom inside the nut body, an inner threaded bushing is movably embedded in the channel, a threaded hole is opened in the middle inside the nut body, a cover cylinder is provided at the top of the nut body, a bottom ring is fixedly connected to the bottom end of the cover cylinder, a sealing ring is fixedly connected to the top end of the bottom ring, a circular plate is provided inside the cover cylinder, a spring is provided at the top of the circular plate, an outer ring is fixedly connected to the bottom end of the nut body, a jack is opened at the top end of the outer ring, a gasket is provided at the bottom of the outer ring, and a plug is fixedly connected to the top end of the gasket.

[0006] Preferably, the plug is movably engaged with the jack, and the gasket is engaged with the outer ring through the jack.

[0007] Preferably, the top end of the spring is fixedly connected to the top inside the cover cylinder, the bottom end of the spring is fixedly connected to the top end of the circular plate, and the circular plate is movably embedded in the cover cylinder through the spring.

[0008] Preferably, a groove is formed at the bottom end of the circular plate, and a screw rod is movably connected in the inner side of the screw hole in a threaded manner.

[0009] Preferably, an opening is formed at the bottom end of the cover cylinder, and the end of the screw rod is movably connected to the circular plate through the groove and the opening.

[0010] Preferably, a cavity is formed at the top of the inner side of the nut body, a round hole is formed at the top end of the cavity, and the cover cylinder is movably and penetratingly connected to the nut body through the circular plate and the round hole.

[0011] Preferably, a notch is formed on one side wall of the internal thread bushing, and the internal thread bushing is movably connected to the screw rod in a threaded manner through the notch.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. For this single nut with an inner sleeve type extrusion and relaxation nut, through the outer ring, the plug pins and the jacks, the gasket placed at the bottom of the nut can be assembled and docked through the plug pins and the jacks before the nut is screwed, so that during the process of screwing the nut, the gasket can still remain in close contact with the nut, making it difficult for the gasket to shift, reducing the probability of the gasket pushing the internal thread bushing out of position, enabling the internal thread bushing to be smoothly extruded and maintaining the male-female thread engagement relationship with the screw rod, thereby facilitating the internal thread bushing to exert a better anti-loosening effect.

[0014] 2. For this single nut with an inner sleeve type extrusion and relaxation nut, through the cover cylinder, the circular plate, the bottom ring, the sealing ring and the spring, after the nut completes the thread engagement with the screw rod, the exposed connection part between the screw rod and the nut can be sealed by the cover cylinder, making it difficult for the threads at the connection part between the screw rod and the nut to be exposed to sunlight and rain, thereby reducing the probability of the threads at the connection part between the nut and the screw rod rusting, and being more conducive to the subsequent disassembly of the nut from the screw rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 is a schematic diagram of the outer ring and the jack structure of the present utility model;

[0017] Figure 3 is a schematic diagram of the cover cylinder and the movable plate structure of the present utility model;

[0018] Figure 4 is a schematic diagram of the gasket and the plug pin structure of the present utility model;

[0019] Figure 5 is a schematic diagram of the spring and the cavity structure of the present utility model.

[0020] In the figure: 1. Cover cylinder; 2. Nut body; 3. Outer ring; 4. Plug; 5. Gasket; 6. Jack; 7. Channel; 8. Screw hole; 9. Internal thread bushing; 10. Notch; 11. Bottom ring; 12. Sealing ring; 13. Opening; 14. Circular plate; 15. Groove; 16. Cavity; 17. Spring; 18. Screw rod. Detailed implementation manner

[0021] 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 work shall fall within the protection scope of the present invention.

[0022] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "provided with", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] As Figures 1 to 5 shown, the single-nut with inner sleeve type extrusion relaxation nut in this embodiment includes a nut body 2. A channel 7 is opened at the bottom inside the nut body 2. An internal thread bushing 9 is movably embedded inside the channel 7. A screw hole 8 is opened in the middle inside the nut body 2. A cover cylinder 1 is provided at the top of the nut body 2. The bottom end of the cover cylinder 1 is fixedly connected with a bottom ring 11. The top end of the bottom ring 11 is fixedly connected with a sealing ring 12. A circular plate 14 is provided inside the cover cylinder 1. A spring 17 is provided at the top of the circular plate 14. The bottom end of the nut body 2 is fixedly connected with an outer ring 3. A jack 6 is opened at the top end of the outer ring 3. A gasket 5 is provided at the bottom of the outer ring 3. A plug 4 is fixedly connected to the top end of the gasket 5.

[0025] Specifically, the nut body 2 is made of alloy steel material, which has a higher hardness than traditional stainless steel, and is wear-resistant and high-temperature resistant. The inner diameter of the screw hole 8 is adapted to the outer diameter of the screw 18 used in conjunction with the nut body 2. The inner thread bushing 9 is a detachable structure, enabling the severely worn inner thread bushing 9 to be replaced in a timely manner. The inner diameter of the cover cylinder 1 is larger than the outer diameter of the circular plate 14, allowing the circular plate 14 to slide smoothly within the cover cylinder 1. The outer diameter of the bottom ring 11 is larger than the inner diameter of the top of the circular hole, such that when the cover cylinder 1 is pushed out of the inner side of the circular hole by the circular plate 14 and the spring 17, the bottom ring 11 and the sealing ring 12 on top of the bottom ring 11 can closely adhere to the top inside the cavity 16, closing the gap at the junction of the circular hole and the cover cylinder 1. The outer diameter of the cover cylinder 1 is adapted to the inner diameter of the circular hole, making the gap at the junction of the cover cylinder 1 and the nut body 2 negligible. The function of the circular plate 14 is to come into contact with the screw 18, enabling the screw 18 passing through the screw hole 8 to act on the cover cylinder 1 through the circular plate 14, causing the cover cylinder 1 to be positioned at the circular hole on top of the nut body 2. The function of the spring 17 is to, through its own deformation, prompt the circular plate 14 to act on the cover cylinder 1. The outer ring 3 and the nut body 2 are of an integral structure, whose function is to increase the contact surface at the bottom end of the nut body 2. The material of the plug 4 is the same as that of the gasket 5, both being silicone, enabling the plug 4 to be smoothly inserted into the jack 6 at the top of the outer ring 3, fixing the gasket 5 to the jack 6 on the outer ring 3 through the plug 4, thereby reducing the probability of the gasket 5 shifting as the nut body 2 is tightened.

[0026] Furthermore, the plug 4 is movably snap-fitted with the jack 6, and the gasket 5 is snap-fitted with the outer ring 3 through the jack 6, enabling the gasket 5 to be fixed to the nut body 2 before the nut is tightened, thus reducing the probability of the gasket 5 shifting when the nut is tightened.

[0027] Furthermore, the top end of the spring 17 is fixedly connected to the top inside the cover cylinder 1, and the bottom end of the spring 17 is fixedly connected to the top end of the circular plate 14. The circular plate 14 is movably embedded with the cover cylinder 1 through the spring 17. The function of the spring 17 is to be able to apply the thrust of the screw 18 received by the circular plate 14 to the cover cylinder 1 through the spring 17, causing the bottom ring 11 and the sealing ring 12 on the cover cylinder 1 to adhere to the circular hole at the bottom of the cavity 16, thereby achieving the sealing of the junction between the screw 18 and the nut body 2.

[0028] Furthermore, a groove 15 is provided at the bottom end of the circular plate 14, and a screw 18 is movably threadedly connected to the inside of the screw hole 8. The inner diameter of the groove 15 is adapted to the outer diameter of the screw 18, enabling the screw 18 to maintain better stability when coming into contact with the circular plate 14.

[0029] Further, an opening 13 is provided at the bottom end of the cover cylinder 1. The end of the screw rod 18 is movably connected to the circular plate 14 through the groove 15 and the opening 13. The function of the opening 13 is to enable the screw rod 18 to pass through and enter the interior of the cover cylinder 1, contact the circular plate 14 inside the cover cylinder 1, so as to realize the contact between the circular plate 14 and the screw rod 18.

[0030] Further, a cavity 16 is provided at the top inside the nut body 2. A round hole is provided at the top end of the cavity 16. The cover cylinder 1 is movably and penetratingly connected to the nut body 2 through the circular plate 14 and the round hole. The function of the cavity 16 is to enable the cover cylinder 1 to have a better moving space inside the nut body 2.

[0031] Furthermore, a notch 10 is provided on one side wall of the internal thread bushing 9. The internal thread bushing 9 is movably threadedly connected to the screw rod 18 through the notch 10. The function of the notch 10 is to enable the internal thread bushing 9 to be smoothly squeezed when threadedly engaging with the screw rod 18, so as to realize the pressing and loosening prevention of the screw rod 18 inside the nut body 2.

[0032] The usage method of this embodiment is as follows: Before passing the screw rod 18 through the nut body 2, it is necessary to first insert the peg 4 on the gasket 5 into the jack 6 of the outer ring 3 to fix the gasket 5 on the outer ring 3. Then, place the internal thread bushing 9 into the channel 7 inside the nut body 2. Next, the screw rod 18 will first pass through the internal thread bushing 9 and engage with the threads on the internal thread bushing 9, causing the nut body 2 to move along the screw rod 18 and engage and lock the screw rod 18. At this time, the gasket 5 and the internal thread bushing 9 will be squeezed by the outer ring 3 to the surface of the object to be locked. When the end of the screw rod 18 passes through the screw hole 8, it will push the cover cylinder 1 inside the cavity 16. Then, the end of the screw rod 18 will contact the circular plate 14 through the groove 15 at the bottom end of the circular plate 14, causing the circular plate 14 to squeeze the spring 17, so that the spring 17 exerts a force on the cover cylinder 1, pushing the cover cylinder 1 to slide out from the round hole at the top of the cavity 16. When the nut body 2 is tightened, the bottom ring 11 and the sealing ring 12 at the bottom end of the cover cylinder 1 will closely adhere to the inner side of the round hole at the top of the cavity 16, closing the gap at the junction of the cover cylinder 1 and the round hole of the nut body 2, making the end of the screw rod 18 in the closed cavity 16, and making the threads at the junction of the screw rod 18 and the screw hole 8 not easily rust due to the action of wind and rain.

[0033] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. 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 single nut with an inner sleeve type extrusion loosening nut, comprising a nut body (2), characterized in that: A channel (7) is provided at the bottom of the inner side of the nut body (2), an internal threaded bushing (9) is movably embedded inside the channel (7), a screw hole (8) is provided at the middle of the inner side of the nut body (2), a cover tube (1) is provided at the top of the nut body (2), a bottom ring (11) is fixedly connected to the bottom end of the cover tube (1), a sealing ring (12) is fixedly connected to the top end of the bottom ring (11), a circular plate (14) is provided inside the cover tube (1), a spring (17) is provided at the top of the circular plate (14), an outer ring (3) is fixedly connected to the bottom end of the nut body (2), a plug hole (6) is provided at the top end of the outer ring (3), a gasket (5) is provided at the bottom of the outer ring (3), and a pin (4) is fixedly connected to the top end of the gasket (5).

2. A single nut with inner sleeve type extrusion loosening nut according to claim 1, characterized in that: The inserting pin (4) is movably engaged with the insertion hole (6), and the gasket (5) is engaged with the outer ring (3) via the insertion hole (6).

3. A single nut with inner sleeve type extrusion loosening nut according to claim 1, characterized in that: The top end of the spring (17) is fixedly connected to the top of the inner side of the cover tube (1), the bottom end of the spring (17) is fixedly connected to the top end of the circular plate (14), and the circular plate (14) is movably embedded and connected to the cover tube (1) via the spring (17).

4. A single nut with inner sleeve type extrusion loosening nut according to claim 1, characterized in that: A groove (15) is formed at the bottom end of the circular plate (14), and a screw rod (18) is connected to the inner movable thread of the screw hole (8).

5. A single nut with inner sleeve type extrusion loosening nut according to claim 4, characterized in that: The bottom end of the cover cylinder (1) is provided with an opening (13), and the end of the screw rod (18) is movably connected to the circular plate (14) via a groove (15) and the opening (13).

6. A single nut with inner sleeve type extrusion loosening nut according to claim 1, characterized in that: A cavity (16) is provided at the top of the inner side of the nut body (2), a circular hole is provided at the top end of the cavity (16), and the cover tube (1) is movably connected to the nut body (2) through the circular plate (14) and the circular hole.

7. A single nut with inner sleeve type extrusion loosening nut according to claim 4, characterized in that: A notch (10) is provided on one side wall of the internal thread bushing (9), and the internal thread bushing (9) is movably threadedly connected to the screw rod (18) via the notch (10).

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