Anti-loose fastener

Abstract

The utility model relates to an anti-loosing fastener, which comprises a bolt and a nut, the bolt comprises a bolt head and a threaded rod body, the threaded rod body is used for being in threaded fit with the nut, the anti-loosing fastener further comprises an elastic mechanism, the elastic mechanism comprises an elastic sheet, one end of the elastic sheet is fixed on the end face of one side, far away from the bolt head, of the nut, and the other end of the elastic sheet is fixed on the end face of the other side of the nut. The other end of the elastic piece is used for being fixedly connected to the end, away from the bolt head, of the threaded rod body after the nut is in threaded fit with the threaded rod body, and the elastic mechanism is arranged, so that the nut bears continuous thrust from the elastic piece after being screwed and always moves towards the bolt head. By means of the structure, stable pre-tightening force can be formed at the threaded connection position, the phenomenon that the nut rotates and loosens due to vibration, impact and other factors is effectively prevented, and therefore the connection reliability and long-term stability are remarkably improved.

Description

Technical Field

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

[0002] In the field of mechanical connections, threaded fasteners (such as bolts and nuts) are widely used in various devices and structures to achieve reliable connections between components. However, in actual use, threaded connections are prone to loosening due to factors such as vibration, impact, temperature changes, or load fluctuations, which can lead to connection failure and even safety accidents. Therefore, improving the anti-loosening performance of threaded connections has always been a key issue in engineering design. To address this issue, this application proposes a threaded fastener structure with improved loosening performance. Utility Model Content

[0003] The utility model provides an anti-loosening fastener, which solves the above-mentioned problems existing in the use process of the prior art.

[0004] The technical solution of the present utility model is achieved as follows: an anti-loosening fastener includes a bolt and a nut, the bolt includes a bolt head and a threaded rod body, the threaded rod body is used to threadably cooperate with the nut, and also includes an elastic mechanism, the elastic mechanism includes an elastic sheet, one end of the elastic sheet is fixed to the end face of the nut away from the bolt head, and the other end of the elastic sheet is used to be fixedly connected to the end of the threaded rod body away from the bolt head after the nut and the threaded rod body are threadably cooperated.

[0005] Preferably, at least two elastic sheets are provided and are equidistantly arranged on the nut at a circumference.

[0006] Preferably, the elastic mechanism further includes a welding ring piece, and one end of each elastic piece facing the nut is fixedly connected to the welding ring piece, and the welding ring piece is fixed on the end face of the nut away from the bolt head.

[0007] Preferably, the elastic mechanism further comprises a fixing plate, and one end of each elastic plate away from the welding ring plate is fixedly connected to the fixing plate, and the fixing plate is used to be fixedly connected to the end of the threaded rod away from the bolt head.

[0008] Preferably, a through opening is provided on the fixing plate, and a threaded hole is provided on the end of the threaded rod away from the bolt head.

[0009] Preferably, the nut is also integrally formed with at least three threaded plates on the end face on the side away from the bolt head. The threaded plates are arranged in a circle and are used to threadably cooperate with the threaded rod body. The end of the threaded plate away from the nut is inclined toward the central axis of the nut.

[0010] Preferably, the nut is integrally formed with a flange plate on one end face close to the bolt head, and the flange plate is provided with a connecting opening.

[0011] In summary, the beneficial effects of the present invention are:

[0012] 1. By providing an elastic mechanism, the nut is continuously pushed by the elastic sheet after tightening, always moving toward the bolt head. This structure can form a stable preload in the threaded connection, effectively preventing the nut from loosening due to factors such as vibration and impact, thereby significantly improving the reliability and long-term stability of the connection.

[0013] 2. By introducing a welded ring as a common connection base for the elastic pieces, not only does the connection strength and consistency between the elastic piece and the nut improve, but it also simplifies the manufacturing and installation process, enhances the overall rigidity and reliability of the structure, and facilitates mass production and standardized assembly. The use of a fixed piece as a unified connection platform at the end of the elastic piece ensures that all elastic pieces exert consistent forces on the threaded rod, improving the mechanical properties and assembly accuracy of the overall structure. It also facilitates connection operations with the end of the threaded rod, increasing installation efficiency and connection security.

[0014] 3. By providing a through-hole in the fixing plate and a threaded hole at the end of the threaded rod, a screw can be passed through the through-hole and screwed into the threaded hole to achieve a quick and reliable connection between the fixing plate and the threaded rod. This simple and practical structure facilitates on-site operation while ensuring a secure connection and helping to improve overall anti-loosening performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 for Figure 1 Schematic diagram of the structure when observed from another angle;

[0018] Figure 3 This is a schematic diagram of the explosion structure of the utility model;

[0019] Figure 4 It is a structural schematic diagram of the nut and the elastic mechanism exploded in the utility model.

[0020] In the figure: 1, bolt; 11, bolt head; 12, threaded rod; 121, threaded hole; 2, nut; 21, threaded plate; 22, flange plate; 221, connecting through-hole; 31, elastic sheet; 32, welding ring sheet; 33, fixing sheet; 331, through-hole. DETAILED DESCRIPTION

[0021] The following is a combination of the appended examples of the present invention Figure 1-4 , clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0022] Example:

[0023] like Figures 1 to 4 As shown, the utility model discloses an anti-loosening fastener, including a bolt 1 and a nut 2, the bolt 1 includes a bolt head 11 and a threaded rod body 12, the threaded rod body 12 has an external thread for threadedly mating with the nut 2 with an internal thread, further, the utility model also includes an elastic mechanism, the elastic mechanism includes an elastic sheet 31, one end of the elastic sheet 31 is fixed to the end face of the nut 2 away from the bolt head 11, and the other end of the elastic sheet 31 is used to be fixedly connected to the end of the threaded rod body 12 away from the bolt head 11 after the nut 2 and the threaded rod body 12 are threadedly mated.

[0024] After the bolt 1 passes through the object to be fixed and is screwed into the nut 2, the end of the elastic sheet 31 is fixed to the end of the threaded rod 12. At this time, the elastic sheet 31 is in an outwardly bent state, thereby generating a continuous elastic force, pushing the nut 2 toward the bolt head 11, thereby forming a stable pre-tightening force at the threaded connection, preventing the nut 2 from rotating and loosening due to vibration or impact. It should be noted that this application has certain requirements for the thickness of the object to be fixed, and it is necessary to ensure that the threaded rod 12 has a certain appropriate length after passing through the nut 2, so as to ensure that the elastic sheet 31 can be in an outwardly bent state to be fixed on the threaded rod 12.

[0025] In this embodiment, six elastic sheets 31 are provided and are equidistantly arranged on the nut 2 at a circumferential distance. This evenly distributed design makes the thrust applied by the elastic mechanism to the nut 2 more uniform, avoiding the deflection of the nut 2 or local stress concentration due to uneven force, thereby improving the stability of the overall structure and the anti-loosening effect.

[0026] Furthermore, the elastic mechanism includes a welded ring 32. Each elastic piece 31 is fixedly connected to the welded ring 32 at one end facing the nut 2. The welded ring 32 is then welded to the end face of the nut 2 facing away from the bolt head 11. This design not only enhances the connection strength between the elastic piece 31 and the nut 2, but also facilitates unified assembly, improves manufacturing efficiency and structural consistency, and is suitable for mass production.

[0027] The elastic mechanism also includes a fixing plate 33. Each elastic plate 31 is fixedly connected to the fixing plate 33 at one end away from the welding ring plate 32. The fixing plate 33 is used to securely connect to the end of the threaded rod 12 away from the bolt head 11. By providing the fixing plate 33 as a unified connection platform for the ends of the elastic plates 31, the direction of force exerted by all elastic plates 31 on the threaded rod 12 is consistent, improving the mechanical properties and assembly accuracy of the overall structure while facilitating on-site installation.

[0028] Furthermore, a through-hole 331 is formed on the fixing plate 33, and a threaded hole 121 is formed on the end of the threaded rod 12 away from the bolt head 11. During installation, after the threaded rod 12 passes through the nut 2 and is tightened, a screw can be passed through the through-hole 331 and screwed into the threaded hole 121, thereby firmly connecting the fixing plate 33 and the threaded rod 12. At the same time, the elastic plate 31 is compressed, causing it to be bent outward.

[0029] In this embodiment, the nut 2 is also integrally formed with at least three threaded plates 21 on the end face of the side away from the bolt head 11. The threaded plates 21 are arranged in a circle and are used to threadably cooperate with the threaded rod body 12. The end of the threaded plate 21 away from the nut 2 is slightly inclined toward the central axis of the nut 2, and the inclination angle is about 3 degrees. This inclined structure can form a certain radial locking force during the thread screwing process, enhance the friction resistance of the threaded connection, and thus further improve the anti-loosening ability.

[0030] In this embodiment, the nut 2 is integrally formed with a flange plate 22 on one end face close to the bolt head 11. The flange plate 22 is provided with a connection opening 221. The flange plate 22 can be used to fix the nut 2 on the object to be fixed.

[0031] It should also be pointed out that the terms indicated in the present invention, such as: "front", "rear", "vertical", "horizontal", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as limiting the scope of protection of the present invention.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An anti-loosening fastener, comprising a bolt and a nut, wherein the bolt comprises a bolt head and a threaded rod, wherein the threaded rod is configured to threadably engage with the nut, and wherein: It also includes an elastic mechanism, which includes an elastic sheet. One end of the elastic sheet is fixed to the end face of the nut away from the bolt head, and the other end of the elastic sheet is used to be fixedly connected to the end of the threaded rod away from the bolt head after the nut and the threaded rod are threadedly engaged.

2. The anti-loosening fastener according to claim 1, characterized in that: At least two elastic sheets are provided and are equidistantly arranged on the nut at a circumferential distance.

3. The anti-loosening fastener according to claim 2, characterized in that: The elastic mechanism also includes a welding ring piece, and one end of each elastic piece facing the nut is fixedly connected to the welding ring piece, and the welding ring piece is fixed on the end face of the nut away from the bolt head.

4. The anti-loosening fastener according to claim 1 or 3, characterized in that: The elastic mechanism also includes a fixing plate, and one end of each elastic plate away from the welding ring plate is fixedly connected to the fixing plate, and the fixing plate is used to be fixedly connected to the end of the threaded rod away from the bolt head.

5. The anti-loosening fastener according to claim 4, characterized in that: A through opening is provided on the fixing plate, and a threaded hole is provided on one end of the threaded rod away from the bolt head.

6. The anti-loosening fastener according to claim 1, characterized in that: The nut is also integrally formed with at least three threaded plates on the end face on the side away from the bolt head. The threaded plates are arranged in a circle and are used to threadably cooperate with the threaded rod body. The end of the threaded plate away from the nut is inclined toward the central axis of the nut.

7. The anti-loosening fastener according to claim 1, characterized in that: The nut is integrally formed with a flange plate on one end surface close to the bolt head, and a connecting opening is opened on the flange plate.

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