Anti-loose fastener

Abstract

The utility model relates to the field of fasteners, and discloses an anti-loosening fastener which comprises a nut, the lower surface of the nut is fixedly connected with a screw rod, the outer surface of the screw rod is in threaded connection with a nut, the lower surface of the nut is in sliding connection with a non-return anti-loosening mechanism, and the non-return anti-loosening mechanism is in threaded connection with the nut. The non-return anti-loosening mechanism comprises a sliding block, a fixing ring, a fixing frame, a rotating shaft, a clamping plate, a spring and a buckle, the lower surface of the sliding block is fixedly connected with the fixing ring, the inner surface of the fixing ring is fixedly connected with the fixing frame, and the inner surface of the fixing frame is fixedly connected with the rotating shaft; by arranging the non-return anti-loosening mechanism, the position of the nut can be limited after the nut is tightened, the nut is prevented from loosening so as to achieve the anti-loosening effect of the fastener, in this way, the screw is prevented from being damaged, meanwhile, disassembly is convenient, the service life of the fastener is prolonged, the fastening effect is improved, the structure is simple, operation is convenient, and practicability is high. The operation difficulty of workers can be reduced, so that the working efficiency of the workers is improved.

Description

Technical Field

[0001] The utility model relates to the field of fasteners, in particular to an anti-loosening fastener. Background Art

[0002] Bolts and nuts are commonly used fasteners. They are used in combination and with washers. Under high-frequency, large-amplitude vibration or impact conditions, nuts usually rotate relative to bolts, causing the fastened object to loosen and shift, that is, the fastening fails. For this reason, people have been studying anti-loosening fasteners. At present, people usually fix the bolts by certain means to prevent them from rotating. There are also various commonly used methods. For example, the anchor bolts of tower and tank equipment are fixed by fixing them with the cement base as one. Of course, some limiting structures can also be added to connect the bolts with the object to be fastened as one. To prevent the nut from rotating, a double nut structure is currently commonly used. The bolt passes through two nuts at the same time and the two nuts are partially nested and then rotated to connect. At the same time, the through holes of the two nuts are eccentrically set. When relative rotation occurs, the middle through holes of the two nuts will be dislocated to firmly clamp the bolts. This method requires that the vibrations between the two nuts are different under the conditions of use, so that rotation between the two nuts can be achieved. Otherwise, it cannot be clamped and the anti-loosening effect is poor.

[0003] The existing patent (publication number: CN202320153109.3) discloses an anti-loosening fastener, including a screw, a nut is fixedly installed on the surface of the screw, and a nut is threadedly connected to the surface of the screw, an anti-loosening mechanism is arranged inside the screw and the nut, a washer body is arranged between the nut and the nut, and a fastening mechanism is arranged inside the washer body. This application uses an anti-loosening mechanism. After the nut is rotated to the surface of the screw, a hexagonal screwdriver is inserted into the hexagonal groove and rotated, so that the rotating block rotates in the first groove, and the rotating block drives the rotating rod and the threaded rod on the surface to rotate. When the threaded rod rotates, it drives the sliding block on the surface to slide in the first slide groove and drives the fixed block on the surface to move. When the fixed block moves to the second groove, since the surface of the threaded rod is provided with a notch, the truncated cone-shaped fixed block will open the four sides of the screw, so that the nut cannot rotate, thereby achieving the purpose of anti-loosening. In the process of realizing the utility model, the inventor found that the prior art has the following problems:

[0004] 1. During long-term work, the internal threaded rod and the sliding block will be loosened by vibration, resulting in a decrease in the supporting force of the internal fixed block on the screw rod, affecting the fastening effect of the entire fastener;

[0005] 2. The engagement between the washer and the nut cannot fix the nut, and it is impossible to ensure that the nut will not loosen under long-term vibration;

[0006] 3. The fixing block will deform the screw after it stretches it. Even if the fixing block is loosened, it will still cause irreversible damage to the screw, making it inconvenient to unscrew the nut and greatly shortening the service life of the screw.

[0007] Therefore, the utility model provides an anti-loosening fastener to solve the problems raised in the above background technology. Utility Model Content

[0008] The purpose of the utility model is to solve the shortcomings existing in the prior art and to propose an anti-loosening fastener. By setting a non-reverse anti-loosening mechanism, the position of the nut can be limited after the nut is tightened, thereby preventing the nut from loosening to achieve the effect of preventing the fastener from loosening. In this way, it is convenient for disassembly while avoiding damage to the screw rod, thereby increasing the service life of the fastener and improving the fastening effect. In addition, the utility model has a simple structure and is easy to operate, which can reduce the operating difficulty of workers and thus improve their work efficiency.

[0009] To achieve the above object, the utility model provides the following technical solution: an anti-loosening fastener, comprising a nut, a screw rod fixedly connected to the lower surface of the nut, a nut threadedly connected to the outer surface of the screw rod, and a non-reverse anti-loosening mechanism slidably connected to the lower surface of the nut;

[0010] The anti-reverse and anti-loosening mechanism includes a slider, a fixing ring, a fixing frame, a rotating shaft, a clamping plate, a spring and a buckle. The lower surface of the slider is fixedly connected to the fixing ring, the inner surface of the fixing ring is fixedly connected to the fixing frame, the inner surface of the fixing frame is fixedly connected to the rotating shaft, the outer surface of the rotating shaft is fixedly connected to the clamping plate, the side surface of the clamping plate is fixedly connected to the spring, the outer surface of the clamping plate is slidably connected to the buckle, the outer surface of the fixing frame is slidably connected to a push plate, the lower surface of the push plate is fixedly connected to a moving plate, and the inner surface of the moving plate is threadedly connected to a threaded rod;

[0011] Through the above technical solution, the nut is screwed onto the screw rod, the fixing frame slides into the inner cavity, and the clamping plate moves upward along the inner cavity. Under the action of the spring, the clamping plate will engage with the buckle to prevent the fixing frame from moving downward, thereby limiting the position of the nut through the fixing ring. By setting a non-reverse and anti-loosening mechanism, the position of the nut can be limited after the nut is tightened to prevent the nut from loosening so as to achieve the effect of preventing the fastener from loosening. In this way, it is convenient to disassemble while avoiding damage to the screw rod, thereby increasing the service life of the fastener and improving the fastening effect. In addition, the structure is simple and easy to operate, which can reduce the operating difficulty of workers and thus improve their work efficiency.

[0012] Furthermore, an inner cavity is provided inside the screw rod, the inner surface of the inner cavity is fixedly connected to the buckle, and the inner surface of the inner cavity is slidably connected to the fixing frame;

[0013] Through the above technical solution, the fixing frame can slide on the surface of the inner cavity to move up and down, so that the fixing frame can drive the clamping plate to move up and down to engage with the buckle.

[0014] Furthermore, a spring washer is slidably connected to the outer surface of the screw, and the number of the spring washers is two and they are distributed up and down;

[0015] Through the above technical solution, the spring washer is put on the screw rod, and the two spring washers are respectively placed above and below the workpiece to be tightened. By utilizing their own elasticity, they can generate rebound force after being compressed, thereby forming a pressure between the nut and the bolt. This pressure can increase the friction between the two and effectively prevent the nut from loosening by itself due to vibration or other reasons.

[0016] Furthermore, a slide groove is provided on the lower surface of the nut, and the inner surface of the slide groove is slidably connected to the slider;

[0017] Through the above technical solution, the sliding block slides in the sliding groove to prevent the fixing ring from rotating with the nut when the nut rotates.

[0018] Further, the outer surface of the threaded rod is rotatably connected to the fixing frame, and the lower surface of the threaded rod is fixedly connected to a knob;

[0019] Through the above technical solution, the rotating knob drives the movable plate to move up and down through the threaded rod, thereby driving the push plate to move up and down, so that when the card plate is folded up by the push plate, the card plate is not fixed with the buckle so that the nut can be removed.

[0020] Furthermore, the outer surface of the card plate is slidably connected to the fixing frame, and the number of the card plates is two and they are distributed on the left and right sides;

[0021] Through the above technical solution, the two clamping plates can rotate in the fixing frame with the rotating shaft as the axis, and can be engaged and released with the buckles, and the two clamping plates can increase the fixing effect.

[0022] Furthermore, the upper surface of the push plate is slidably connected to the card plate, and the number of the push plates is two and they are distributed on the left and right sides;

[0023] Through the above technical solution, when the push plate moves upward, the two clamping plates will be retracted toward the middle, so that the clamping plates are disengaged from the buckles, making it easier to remove the nut by twisting it.

[0024] The utility model has the following beneficial effects:

[0025] 1. The utility model proposes an anti-loosening fastener, which can limit the position of the nut after the nut is tightened to prevent the nut from loosening so as to achieve the effect of preventing the fastener from loosening. This avoids damage to the screw rod and facilitates disassembly, thereby increasing the service life of the fastener and improving the fastening effect.

[0026] 2. The anti-loosening fastener proposed by the utility model has a simple structure and is easy to operate, which can reduce the operating difficulty of workers and thus improve their work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is the overall structure diagram of the utility model;

[0028] Figure 2 It is a cross-sectional schematic diagram of the utility model;

[0029] Figure 3 for Figure 2 The enlarged schematic diagram at A in the middle;

[0030] Figure 4 This is a schematic diagram of the anti-reverse and anti-loosening mechanism of the utility model;

[0031] Figure 5 for Figure 4 Enlarged schematic diagram of point B in the middle.

[0032] Legend:

[0033] 1. Nut; 2. Screw; 3. Nut; 4. Anti-reverse and anti-loosening mechanism; 5. Slider; 6. Fixed ring; 7. Fixed frame; 8. Rotating shaft; 9. Clamp; 10. Spring; 11. Buckle; 12. Push plate; 13. Moving plate; 14. Threaded rod; 15. Inner cavity; 16. Spring gasket; 17. Slide groove; 18. Knob. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] Example 1

[0036] Reference Figure 1-5 The utility model provides an embodiment: comprising a nut 1, a screw 2 is fixedly connected to the lower surface of the nut 1, an inner cavity 15 is arranged inside the screw 2, a spring washer 16 is slidably connected to the outer surface of the screw 2, the number of the spring washers 16 is two and they are distributed up and down, a nut 3 is threadedly connected to the outer surface of the screw 2, a slide groove 17 is arranged on the lower surface of the nut 3, and a non-reverse and anti-loosening mechanism 4 is slidably connected to the lower surface of the nut 3.

[0037] During specific use, the spring washer 16 is put on the screw rod 2, and the two spring washers 16 are respectively placed above and below the workpiece to be tightened, and the nut 3 is tightened. The spring washer 16 can generate a rebound force after being compressed by utilizing its own elasticity, thereby forming a pressure between the nut 3 and the nut 1. This pressure can increase the friction between the two, and effectively prevent the nut 3 from loosening by itself due to vibration or other reasons.

[0038] The anti-reverse loosening mechanism 4 includes a slider 5, a fixing ring 6, a fixing frame 7, a rotating shaft 8, a card plate 9, a spring 10 and a buckle 11. The lower surface of the slider 5 is fixedly connected to the fixing ring 6, the inner surface of the slide groove 17 is slidably connected to the slider 5, the inner surface of the fixing ring 6 is fixedly connected to the fixing frame 7, the inner surface of the inner cavity 15 is slidably connected to the fixing frame 7, the inner surface of the fixing frame 7 is fixedly connected to the rotating shaft 8, the outer surface of the rotating shaft 8 is fixedly connected to the card plate 9, the outer surface of the card plate 9 is slidably connected to the fixing frame 7, the number of the card plates 9 is two and they are distributed on the left and right, and the card plates The side surface of 9 is fixedly connected to the spring 10, the outer surface of the card plate 9 is slidably connected to the buckle 11, the inner surface of the inner cavity 15 is fixedly connected to the buckle 11, the outer surface of the fixed frame 7 is slidably connected to the push plate 12, the upper surface of the push plate 12 is slidably connected to the card plate 9, the number of push plates 12 is two and distributed on the left and right, the lower surface of the push plate 12 is fixedly connected to the movable plate 13, the inner surface of the movable plate 13 is threadedly connected to the threaded rod 14, the outer surface of the threaded rod 14 is rotatably connected to the fixed frame 7, and the lower surface of the threaded rod 14 is fixedly connected to the knob 18.

[0039] When in use, the nut 3 is screwed onto the screw rod 2, the fixing frame 7 slides into the inner cavity 15, and the clamping plate 9 moves upward along the inner cavity 15. Under the action of the spring 10, the clamping plate 9 will engage with the buckle 11 to prevent the fixing frame 7 from moving downward, thereby limiting the position of the nut 3 through the fixing ring 6. The knob 18 is turned to drive the moving plate 13 to move upward through the threaded rod 14, and the two clamping plates 9 are pushed to shrink and disengage from the buckle 11 through the push plate 12, so that the nut 3 can be screwed off. By setting a non-reverse anti-loosening mechanism (4), the position of the nut 3 can be limited after the nut 3 is tightened to prevent the nut 3 from loosening to achieve the effect of preventing the fastener from loosening. In this way, it is convenient to disassemble while avoiding damage to the screw rod 2, thereby increasing the service life of the fastener and improving the tightening effect. In addition, the structure is simple and easy to operate, which can reduce the difficulty of operation for workers and thus improve their work efficiency.

[0040] Working principle: Put the spring washer 16 on the screw rod 2, and place the two spring washers 16 above and below the workpiece to be tightened respectively. Tighten the nut 3, and the fixing frame 7 slides into the inner cavity 15. The slider 5 slides in the slide groove 17 to prevent the fixing ring 6 from rotating with the nut 3 when the nut 3 rotates. The clamping plate 9 moves upward along the inner cavity 15. Under the action of the spring 10, the clamping plate 9 will engage with the buckle 11 to prevent the fixing frame 7 from moving downward, thereby limiting the position of the nut 3 through the fixing ring 6. Turn the knob 18 to drive the moving plate 13 to move upward through the threaded rod 14, and push the two clamping plates 9 to shrink and disengage from the buckle 11 through the push plate 12, so that the nut 3 can be screwed off.

[0041] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An anti-loosening fastener, comprising a nut (1), characterized in that: The lower surface of the nut (1) is fixedly connected to a screw rod (2), the outer surface of the screw rod (2) is threadedly connected to a nut (3), and the lower surface of the nut (3) is slidably connected to a non-reverse and anti-loosening mechanism (4); The anti-reverse and anti-loosening mechanism (4) comprises a slider (5), a fixing ring (6), a fixing frame (7), a rotating shaft (8), a clamping plate (9), a spring (10) and a buckle (11); the lower surface of the slider (5) is fixedly connected to the fixing ring (6); the inner surface of the fixing ring (6) is fixedly connected to the fixing frame (7); the inner surface of the fixing frame (7) is fixedly connected to the rotating shaft (8); the outer surface of the rotating shaft (8) is fixedly connected to the clamping plate (9); the side surface of the clamping plate (9) is fixedly connected to the spring (10); the outer surface of the clamping plate (9) is slidably connected to the buckle (11); the outer surface of the fixing frame (7) is slidably connected to a push plate (12); the lower surface of the push plate (12) is fixedly connected to a moving plate (13); the inner surface of the moving plate (13) is threadedly connected to a threaded rod (14).

2. The anti-loosening fastener according to claim 1, characterized in that: An inner cavity (15) is provided inside the screw rod (2), the inner surface of the inner cavity (15) is fixedly connected to the buckle (11), and the inner surface of the inner cavity (15) is slidably connected to the fixing frame (7).

3. The anti-loosening fastener according to claim 1, characterized in that: The outer surface of the screw rod (2) is slidably connected with a spring washer (16), and the number of the spring washers (16) is two and they are distributed up and down.

4. The anti-loosening fastener according to claim 1, characterized in that: A sliding groove (17) is provided on the lower surface of the nut (3), and the inner surface of the sliding groove (17) is slidably connected to the slider (5).

5. The anti-loosening fastener according to claim 1, characterized in that: The outer surface of the threaded rod (14) is rotatably connected to the fixing frame (7), and the lower surface of the threaded rod (14) is fixedly connected to a knob (18).

6. The anti-loosening fastener according to claim 1, characterized in that: The outer surface of the clamping plate (9) is slidably connected to the fixing frame (7), and the number of the clamping plates (9) is two and they are distributed on the left and right.

7. The anti-loosening fastener according to claim 1, characterized in that: The upper surface of the push plate (12) is slidably connected to the clamping plate (9), and there are two push plates (12) distributed on the left and right.

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