Anti-loosening bolt

Abstract

The utility model relates to the technical field of fasteners, in particular to an anti-loosening bolt which comprises a hexagonal nut. The screw rod is formed below the hexagonal nut, the screw rod and the hexagonal nut are integrally formed in a cold heading mode, the screw rod comprises two sections, the end, close to the hexagonal nut, of the first section is an unthreaded area, the end, close to the lower end of the screw rod, of the second section is a threaded area, and spiral threads are arranged on the outer edge of the threaded area of the screw rod; the gasket is arranged below the hexagonal nut and connected to the outer side of the screw in a sleeving mode; the anti-loosening bolt comprises a hexagonal nut and a screw rod, the fastener is used for preventing the hexagonal nut and the screw rod from loosening in fastening, the first anti-loosening part comprises a positioning rod penetrating through the screw rod, the middle of the positioning rod penetrates through the screw rod, and a detachable anti-loosening assembly is arranged on the portion, extending out of the bolt, of the positioning rod. The second anti-loosening part is arranged between the threaded area and the non-threaded area and comprises a groove with a semicircular section, the groove is formed around the periphery of the screw rod, and the groove is connected with an anti-skid ring in a sleeved mode. The utility model has the advantages of reasonable structure and excellent anti-loosening performance.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, and particularly relates to an anti-loosening bolt. Background Art

[0002] As a common connection method, bolt connection is widely used in the fields of mechanical manufacturing, construction engineering, automobile manufacturing, etc. Bolt connection can be traced back to ancient civilizations, when people had already started using bolts to connect wood and metal parts. With the development of industrialization, bolt connection has gradually become an important connection method, replacing traditional methods such as welding and riveting.

[0003] However, there are still some problems in the current bolt connection technology. Firstly, unreasonable design and selection of bolt connection may lead to connection failure, especially in harsh environments such as high temperature and high pressure. Secondly, the loosening problem of bolt connection is still a common problem, especially prone to occur in a vibrating environment. In addition, the control and detection of the pre-tightening force of bolt connection are also problems that need to be solved urgently. Too high or too low pre-tightening force will affect the stability and reliability of the connection.

[0004] In view of the problems existing in bolt connection, some solutions have been proposed currently. For example, methods such as using double nuts, applying anti-loosening agents, and using spring washers can effectively reduce the risk of bolt connection loosening. However, it should also be noted that double nuts and applying anti-loosening agents increase the complexity and cost of bolt connection; spring washers are easily affected by the external environment and fail. The inventor has proposed further improvements for the loosening problem. Content of the Utility Model

[0005] The purpose of the utility model is to provide an anti-loosening bolt with reasonable structure and excellent anti-loosening performance. To achieve the above-mentioned utility model purpose, an anti-loosening bolt of the utility model includes:

[0006] A hexagonal nut;

[0007] A screw rod, which is formed below the hexagonal nut and is integrally cold-forged with the hexagonal nut. Among them, the screw rod includes two sections. One end of the first section close to the hexagonal nut is a threadless area, and the second section close to the lower end of the screw rod is a threaded area. And a spiral thread is provided on the outer edge of the threaded area of the screw rod;

[0008] A gasket, which is arranged below the hexagonal nut and sleeved on the outer side of the screw rod; and

[0009] A fastener for preventing the fastening of a hexagonal nut and a screw from loosening, which includes a first anti-loosening part and a second anti-loosening component. The first anti-loosening part includes a positioning rod passing through the screw. The middle part of the positioning rod passes through the screw, and a detachable anti-detachment component is arranged on the part of the positioning rod protruding from the bolt. The second anti-loosening part is arranged between the threaded area and the non-threaded area, and includes a groove with a semicircular cross-section, which is opened around the outer circumference of the screw, and an anti-slip ring is sleeved on the groove. The positioning rod and the anti-detachment component are connected by threads to ensure that the anti-detachment component is firmly fixed on the positioning rod; it is used to prevent the fastener from loosening and coming off; a groove is arranged in the middle of the screw for sleeving the anti-slip ring to increase the anti-loosening performance of the bolt.

[0010] A further improvement of the anti-loosening bolt of the present utility model lies in that the positioning rod is cylindrical and its diameter is slightly smaller than the diameter of the screw.

[0011] A further improvement of the anti-loosening bolt of the present utility model lies in that the anti-slip ring is made of rubber material, and a convex structure is arranged on its inner surface, which is matched with the semicircular cross-section of the groove.

[0012] A further improvement of the anti-loosening bolt of the present utility model lies in that the positioning rod is screwed with the anti-detachment component, and the size of the anti-detachment component is larger than the diameter of the screw.

[0013] The beneficial effects of the present utility model are as follows:

[0014] The positioning rod and the anti-detachment component are connected by threads to ensure that the anti-detachment component is firmly fixed on the positioning rod; it is used to prevent the fastener from loosening and coming off; a groove is arranged in the middle of the screw for sleeving the anti-slip ring to increase the anti-loosening performance of the bolt. Description of the Drawings

[0015] Figure 1 It is a schematic diagram in one direction of the present utility model.

[0016] Among them, hexagonal nut 1, screw 2, non-threaded area 21, threaded area 22, gasket 3, positioning rod 4, anti-detachment component 42, groove 43. Detailed Embodiments

[0017] The following further clarifies the present utility model in combination with specific embodiments. It should be understood that these embodiments are only used to illustrate the present utility model and not to limit the scope of the present utility model. After reading the present utility model, various equivalent modifications of the present utility model by those skilled in the art all fall within the scope defined by the appended claims of this application.

[0018] It should be noted that: similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0019] Such asFigure 1 As shown in the figure, a loosening-preventing bolt includes:

[0020] A hexagonal nut 1;

[0021] A screw rod 2, which is formed below the hexagonal nut and integrally cold-forged with the hexagonal nut. Among them, the screw rod includes two sections. One end of the first section close to the hexagonal nut is a non-threaded area 21, and the second section close to the lower end of the screw rod is a threaded area 22. And spiral threads are provided on the outer edge of the threaded area of the screw rod;

[0022] A gasket 3, which is arranged below the hexagonal nut and sleeved on the outside of the screw rod; and

[0023] A fastener for preventing the fastening looseness of the hexagonal nut and the screw rod. Among them, it includes a first anti-loosening part and a second anti-loosening component. Among them, the first anti-loosening part includes a positioning rod 4 penetrating through the screw rod. The middle part of the positioning rod penetrates through the screw rod. A detachable anti-disengagement component 42 is arranged on the part of the positioning rod extending out of the bolt. The second anti-loosening part is arranged between the threaded area and the non-threaded area. Among them, it includes a groove 43 with a semi-circular cross-section, which is opened around the outer circumference of the screw rod, and an anti-slip ring is sleeved on the groove. The positioning rod and the anti-disengagement component are connected by threads to ensure that the anti-disengagement component is firmly fixed on the positioning rod; to prevent the fastener from loosening and disengaging; a groove is arranged in the middle of the screw rod for sleeving the anti-slip ring to increase the anti-loosening performance of the bolt.

[0024] Specifically, the positioning rod is cylindrical and its diameter is slightly smaller than the diameter of the screw rod.

[0025] Specifically, the anti-slip ring is made of rubber material, and a convex structure is arranged on its inner surface, which is matched with the semi-circular cross-section of the groove.

[0026] Specifically, the positioning rod is screwed with the anti-disengagement component, and the size of the anti-disengagement component is larger than the diameter of the screw rod.

[0027] The above shows and describes the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0028] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only an independent technical solution. This narrative style of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A anti-loosening bolt, characterized in that, Comprising: A hexagonal nut; a screw rod formed below the hexagonal nut and integrally cold-heading formed with the hexagonal nut. Wherein, the screw rod includes two sections. One end of the first section close to the hexagonal nut is a threadless area, and one end of the second section close to the lower end of the screw rod is a threaded area. And a spiral thread is provided on the outer edge of the threaded area of the screw rod; a gasket disposed below the hexagonal nut and sleeved outside the screw rod; and a fastener for preventing the fastening of the hexagonal nut and the screw rod from loosening, including a first anti-loosening part and a second anti-loosening part. Wherein, the first anti-loosening part includes a positioning rod penetrating through the screw rod. The middle part of the positioning rod penetrates through the screw rod, and a detachable anti-detachment component is provided on the part of the positioning rod extending out of the bolt. The second anti-loosening part is disposed between the threaded area and the threadless area, including a groove with a semi-circular cross-section, the groove is opened around the outer circumference of the screw rod, and an anti-slip ring is sleeved in the groove.

2. The anti-loosening bolt according to claim 1, characterized in that: The positioning rod is cylindrical and its diameter is slightly smaller than the diameter of the screw rod.

3. The anti-loosening bolt according to claim 2, characterized in that: The anti-slip ring is made of rubber material, and a convex structure is provided on its inner surface, which matches the semi-circular cross-section of the groove.

4. The anti-loosening bolt according to claim 3, characterized in that: The positioning rod is screwed with the anti-detachment component, and the size of the anti-detachment component is larger than the diameter of the screw rod.

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