Anti-loosening bolt structure

Abstract

The utility model discloses an anti-loosening bolt structure which comprises a bolt body, a metal sealing gasket, meshing grooves, a nut and meshing teeth, the metal sealing gasket is screwed on the outer wall of the bolt body in a threaded mode, the metal sealing gasket is of a round structure, the bottom end face of the metal sealing gasket is provided with a plurality of meshing grooves, and the meshing grooves are connected with the nut in a threaded mode. The outer wall of the bolt body is in threaded connection with a nut, the top end face of the nut is provided with a plurality of meshing teeth matched with the meshing grooves, the meshing teeth are used for being embedded into the meshing grooves to achieve the anti-loosening effect on the bolt body, the outer wall of the bolt body is sleeved with a rubber gasket, and the rubber gasket is located between the bolt body and the metal sealing gasket. The number of the meshing grooves is four, the number of the meshing grooves is four, the number of the meshing teeth is four, the number of the meshing teeth is four, the number of the meshing teeth is four, the number of the meshing teeth is four, the anti-loosening effect of the bolt can be greatly improved, and the bolt is not prone to loosening in the long-time using process.

Description

Technical Field

[0001] The utility model relates to the technical field of bolts, in particular to the technical field of an anti-loosening bolt structure. Background Art

[0002] A bolt is a mechanical part, a cylindrical threaded fastener used with a nut, and is a type of fastener composed of two parts: a head and a cylinder with external threads on the screw rod. At present, most of the existing bolts have low strength and are prone to breakage. For example, bolts used in ultra-high pressure equipment need to apply a large prestress to ensure the sealing of the container. If the prestress is too large, it is easy to cause the bolts to break, thereby reducing the service life of the bolts.

[0003] To solve the problems raised in the background art, for example, the high-strength bolt disclosed in Application No. CN201220072222.0 includes an outer head, an arc groove, a screw rod, and a top head. The outer head and the screw rod are connected through the arc groove. The outer head is fixed on both sides of the top head, and the top head and the screw rod are fixed. By increasing the area between the outer head and the screw rod, it can withstand a large prestress and will not break. However, this structure still has the following defects:

[0004] Although this structure can withstand a large prestress and will not break by increasing the area between the outer head and the screw rod, the structure of this bolt is relatively simple. In an environment with strong vibration or shaking, this bolt will loosen, and after a long time, the bolt is easy to fall off, which is very inconvenient for use.

[0005] To solve the problems raised in the above technology, for example, the anti-loosening bolt disclosed in Application No. CN201320330011.7 includes a body. A bolt head is provided at the upper end of the body, and a thread is provided at the lower end of the body. A fastening cap is provided on the body below the bolt head. The fastening cap is conical and extends outward from the body, and an anti-slip tooth in a "wavy line" shape is provided at the lower end of the fastening cap. An inwardly concave arc groove is provided on the outer periphery of the body between the thread and the fastening cap. By having a fastening cap with an anti-slip function on the bolt, and an anti-slip tooth in a "wavy line" shape is provided on its lower end surface, the friction between the bolt head and the mating surface is enhanced, thereby improving the fastening performance of the bolt better and having a better anti-loosening effect. By providing an arc groove between the thread and the fastening cap, after the bolt is installed, it can not only improve its installation strength but also save materials. However, this structure still has the following defects:

[0006] Although this structure enhances the friction between the bolt head and the mating surface by providing anti-slip teeth at the lower end of the fastening cap, thereby increasing the anti-loosening effect, only the anti-slip teeth are not sufficient to achieve the purpose of long-term anti-loosening. After the bolt is used for a long time, it is still easy to loosen, resulting in a problem of poor practicability. Summary of the Invention

[0007] The object of the present utility model is to solve the problems in the prior art and propose an anti-loosening bolt structure, which can greatly improve the anti-loosening effect of the bolt, so that the bolt is not prone to loosening during long-term use.

[0008] To achieve the above object, the present utility model proposes an anti-loosening bolt structure, including a bolt body, a metal gasket, a biting groove, a nut, and biting teeth. The outer wall of the bolt body is threadedly connected with a metal gasket. The metal gasket has a circular structure. A plurality of biting grooves are provided on the bottom end surface of the metal gasket. The outer wall of the bolt body is threadedly connected with a nut. A plurality of biting teeth adapted to the biting grooves are provided on the top end surface of the nut. The biting teeth are used to embed into the biting grooves to play an anti-loosening role for the bolt body.

[0009] Preferably, a rubber gasket is sleeved on the outer wall of the bolt body, and the rubber gasket is located between the bolt body and the metal gasket.

[0010] Preferably, the number of the biting grooves is four, and the four biting grooves are distributed in a circular array.

[0011] Preferably, the number of the biting teeth is four, and the four biting teeth are distributed in a circular array.

[0012] Preferably, a reinforcing rib is fixedly installed inside the bolt body, and the reinforcing rib is arranged along the length direction of the bolt body.

[0013] Preferably, screw holes are provided on the top end surface of the head of the bolt body, and the screw holes are symmetrically arranged up and down. Rotating rods are threadedly arranged in both of the two screw holes. The lower end of the rotating rod penetrates to the bottom end surface of the head of the bolt body. A fixing block with a circular structure is connected to the bottom end of the rotating rod. A plurality of pointed teeth for increasing friction are provided on the bottom end surface of the fixing block.

[0014] Preferably, a cross slot adapted to an external tool is provided at the top end of the rotating rod.

[0015] The beneficial effects of the present utility model:

[0016] 1. By the combined use of the metal gasket, the biting grooves, the nut, and the biting teeth, the anti-loosening effect of the bolt can be improved. After the metal gasket is installed on the outer wall of the bolt body and the nut is tightened, the biting teeth on the nut can be embedded into the biting grooves on the metal gasket, thereby playing a limiting role for the bolt body. When the bolt body is subjected to severe vibration from the outside, the biting teeth can tightly resist the biting grooves, so that the nut is not prone to rotate left and right, thereby achieving the anti-loosening effect;

[0017] 2. Through the combined use of the rotating rod, fixed block, and pointed teeth, the present utility model can further improve the anti-loosening effect of the bolt. After the bolt body is installed on the workpiece, a tool is inserted into the cross slot and rotated, thereby driving the rotating rod to rotate and descend, enabling the pointed teeth on the fixed block to abut against the surface of the workpiece, thereby increasing the friction between the bolt body and the workpiece, further improving the anti-loosening effect of the bolt body, making it difficult for the bolt body to become loose after long-term use, greatly improving the service life, solving the problem that the bolt is still prone to loosening after long-term use, and thus causing poor practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the front view of a bolt structure with anti-loosening function of the present utility model;

[0019] Figure 2 is the schematic diagram of the metal gasket of a bolt structure with anti-loosening function of the present utility model;

[0020] Figure 3 is the schematic diagram of the nut of a bolt structure with anti-loosening function of the present utility model;

[0021] Figure 4 is the schematic diagram of the head of a bolt structure with anti-loosening function of the present utility model;

[0022] Figure 5 is the exploded view of a bolt structure with anti-loosening function of the present utility model;

[0023] In the figure: 1 - bolt body, 2 - metal gasket, 3 - engaging groove, 4 - nut, 5 - engaging teeth, 6 - rubber washer, 7 - reinforcing rib, 8 - screw hole, 9 - rotating rod, 10 - fixed block, 11 - pointed teeth, 12 - cross slot. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Refer to Figures 1 to 5, A loosening-proof bolt structure of the present utility model includes a bolt body 1, a metal gasket 2, a biting groove 3, a nut 4, and a biting tooth 5. The outer wall of the bolt body 1 is screwed with the metal gasket 2. The metal gasket 2 is of a circular structure. A plurality of biting grooves 3 are provided on the bottom end surface of the metal gasket 2. The outer wall of the bolt body 1 is screwed with the nut 4. A plurality of biting teeth 5 adapted to the biting grooves 3 are provided on the top end surface of the nut 4. The biting teeth 5 are used to be embedded in the biting grooves 3 to play a loosening-proof role for the bolt body 1. After installing the metal gasket 2 on the outer wall of the bolt body 1 and then tightening the nut 4, the biting teeth 5 on the nut 4 can be embedded into the biting grooves 3 on the metal gasket 2, thereby playing a limiting role for the bolt body 1. When the bolt body 1 is subjected to severe vibration from the outside, the biting teeth 5 can tightly abut against the biting grooves 3, making it difficult for the nut 4 to rotate left and right, thus achieving the effect of preventing loosening.

[0025] Refer to Figure 1 and Figure 5 , A loosening-proof bolt structure of the present utility model, a rubber washer 6 is sleeved on the outer wall of the bolt body 1. The rubber washer 6 is located between the bolt body 1 and the metal gasket 2. By providing the rubber washer 6, it can play a role in shock absorption and wear resistance, thereby further extending the service life of the bolt body 1.

[0026] Refer to Figure 2 , A loosening-proof bolt structure of the present utility model, the number of the biting grooves 3 is four, and the four biting grooves 3 are distributed in a circular array. Arranging four biting grooves 3 can increase the biting force and make the biting force more uniform.

[0027] Refer to Figure 3 , A loosening-proof bolt structure of the present utility model, the number of the biting teeth 5 is four, and the four biting teeth 5 are distributed in a circular array. By embedding the biting teeth 5 into the biting grooves 3, when subjected to vibration from the outside, the biting teeth 5 can firmly abut against the biting grooves 3, thus making it difficult for the nut 4 to rotate.

[0028] Refer to Figure 1 and Figure 5 , A loosening-proof bolt structure of the present utility model, a reinforcing rib 7 is fixedly installed inside the bolt body 1. The reinforcing rib 7 is arranged along the length direction of the bolt body 1. By providing the reinforcing rib 7, the strength of the bolt body 1 can be increased, thereby extending its service life.

[0029] Refer to Figure 1 and Figure 5, a loosening-proof bolt structure of the present utility model, a screw hole 8 is provided on the top end surface of the head of the bolt body 1, the screw holes 8 are symmetrically arranged up and down, a rotating rod 9 is threadedly arranged in each of the two screw holes 8, the lower end of the rotating rod 9 penetrates to the bottom end surface of the head of the bolt body 1, a circular fixing block 10 is connected to the bottom end of the rotating rod 9, and a plurality of pointed teeth 11 for increasing friction are arranged on the bottom end surface of the fixing block 10. By inserting a tool into the cross slot 12 and rotating, the rotating rod 9 is driven to rotate and descend, so that the pointed teeth 11 on the fixing block 10 can abut against the surface of the workpiece, thereby increasing the friction between the bolt body 1 and the workpiece, and further improving the loosening-proof effect of the bolt body 1.

[0030] Refer to Figure 4 , a loosening-proof bolt structure of the present utility model, a cross slot 12 adapted to an external tool is provided at the top end of the rotating rod 9.

[0031] Working process of the present utility model:

[0032] During the working process of a loosening-proof bolt structure of the present utility model, first, the bolt body 1 is installed on the workpiece, then a rubber washer 6 is sleeved, and then a metal gasket 2 is installed on the outer wall of the bolt body 1. When the nut 4 is tightened, the engaging teeth 5 on the nut 4 can be embedded into the engaging grooves 3 on the metal gasket 2, thereby playing a role in limiting the bolt body 1. When the bolt body 1 is subjected to severe vibration from the outside, the engaging teeth 5 can tightly abut against the engaging grooves 3, making it difficult for the nut 4 to rotate left and right. Then, by inserting a tool into the cross slot 12 and rotating, the rotating rod 9 is driven to rotate and descend, so that the pointed teeth 11 on the fixing block 10 can abut against the surface of the workpiece, thereby increasing the friction between the bolt body 1 and the workpiece, and further improving the loosening-proof effect of the bolt body 1, so that the bolt body 1 is not easily loosened after long-term use, greatly improving the service life.

[0033] The above embodiments are illustrative of the present utility model, not limiting the present utility model. Any scheme obtained by simply transforming the present utility model belongs to the protection scope of the present utility model.

Claims

1. An anti-loosening bolt structure, characterized in that: The invention comprises a bolt body (1), a metal sealing gasket (2), an engagement groove (3), a nut (4), and engagement teeth (5); the outer wall of the bolt body (1) is threadedly screwed with the metal sealing gasket (2); the metal sealing gasket (2) is in a circular structure; the bottom end surface of the metal sealing gasket (2) is provided with a plurality of engagement grooves (3); the outer wall of the bolt body (1) is threadedly screwed with a nut (4); the top end surface of the nut (4) is provided with a plurality of engagement teeth (5) matched with the engagement grooves (3); the engagement teeth (5) are used to be embedded in the engagement grooves (3) to prevent the bolt body (1) from loosening.

2. The anti-loosening bolt structure according to claim 1, characterized in that: The outer wall of the bolt body (1) is sleeved with a rubber gasket (6), and the rubber gasket (6) is located between the bolt body (1) and the metal sealing gasket (2).

3. The anti-loosening bolt structure according to claim 1, characterized in that: There are four bite grooves (3), and the four bite grooves (3) are distributed in a ring array.

4. The anti-loosening bolt structure according to claim 1, characterized in that: The number of the engaging teeth (5) is four, and the four engaging teeth (5) are distributed in a ring array.

5. The anti-loosening bolt structure according to claim 1, characterized in that: A reinforcing rib (7) is fixedly installed inside the bolt body (1), and the reinforcing rib (7) is arranged along the length direction of the bolt body (1).

6. The anti-loosening bolt structure according to claim 1, characterized in that: The top end surface of the head of the bolt body (1) is provided with a screw hole (8), the screw holes (8) are symmetrically arranged in the upper and lower parts, and a rotating rod (9) is threadedly arranged in the two screw holes (8), the lower end of the rotating rod (9) penetrates the bottom end surface of the head of the bolt body (1), and the bottom end of the rotating rod (9) is connected to a fixing block (10) with a circular structure, and the bottom end surface of the fixing block (10) is provided with a plurality of sharp teeth (11) for increasing friction.

7. The anti-loosening bolt structure according to claim 6, characterized in that: The top end of the rotating rod (9) is provided with a cross groove (12) adapted to fit an external tool.

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