Improved anti-falling screw structure

Abstract

The utility model discloses an improved anti-falling screw structure which aims at solving the problem that an existing screw is prone to loosening and falling off under the high-frequency vibration condition. The screw comprises a screw rod, a nut and an elastic self-locking assembly, non-equidistant screw pitch sections are designed on the screw rod, and matched annular grooves and protrusions are arranged in the nut, so that the locking friction force is increased, and the anti-loosening effect is improved. The elastic self-locking assembly is provided with a plurality of elastic clamping jaws which are used in cooperation with the annular grooves and the protrusions of the nut, so that the nut is effectively prevented from being loosened and is stable after being screwed into the screw rod, and the fastening requirements under various vibration and load conditions are met.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to an improved anti-loosening and anti-dropping screw structure for improving the anti-loosening and anti-dropping effects. Background Technique

[0002] During the use of the existing screw structure, affected by factors such as high-frequency vibration and temperature changes, it is prone to looseness or dropping. Especially under high-load conditions such as mechanical equipment and vehicles, it cannot maintain stable fastening for a long time. The existing technology usually increases friction or uses anti-loosening washers and other methods, but the effect is limited and the structure is complex. Therefore, it is particularly important to develop an improved anti-dropping screw structure that can automatically prevent loosening under various conditions and has a simple structure. Content of the Utility Model

[0003] The purpose of the utility model is to provide an improved anti-dropping screw structure to solve the problems raised in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solutions:

[0005] An improved anti-dropping screw structure includes a screw rod, a nut, and an elastic self-locking assembly. The screw rod is provided with a non-uniform pitch section. The elastic self-locking assembly includes a plurality of elastic claws. The inner wall of the nut is provided with an annular groove and a protrusion that cooperate with the elastic claws. When the nut is screwed onto the screw rod, the elastic claws are engaged and cooperated with the annular groove and the protrusion to achieve the anti-dropping function of the nut.

[0006] Preferably, the pitch of the non-uniform pitch section gradually increases along the length direction of the screw rod to gradually increase the locking force during the process of screwing the nut.

[0007] Preferably, the number of the elastic claws is three, which are evenly distributed in the annular groove on the inner wall of the nut.

[0008] Preferably, the depth of the annular groove on the inner wall of the nut is 0.2 to 0.5 millimeters to maintain the engagement effect of the elastic claws.

[0009] Preferably, a limiting ring is provided at the end of the screw rod to prevent the nut from slipping out from the end of the screw rod.

[0010] Preferably, anti-slip patterns are provided inside the nut to increase the friction force during the screwing of the nut and prevent loosening.

[0011] Preferably, the elastic claws are made of wear-resistant alloy material to extend the service life of the claws.

[0012] Preferably, the surface of the screw rod is coated with a corrosion-resistant coating to improve the corrosion resistance of the screw rod in a high-humidity environment.

[0013] Preferably, a sealing ring is provided on the top of the nut to prevent external contaminants from entering the threaded connection part.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. For this improved anti-loosening screw structure, by designing a non-uniform pitch section on the screw rod and providing an annular groove and a protrusion on the inner wall of the nut, and cooperating with the elastic claws of the elastic self-locking assembly, an efficient anti-loosening function without additional anti-loosening washers is achieved. This integrated design simplifies the structure, reduces the number of parts, thereby reducing the processing difficulty and production cost, and significantly improving the anti-loosening performance.

[0016] 2. For this improved anti-loosening screw structure, through the non-uniform pitch section with gradually increasing pitch and the multi-point engagement of the elastic self-locking assembly, the locking force gradually increases as the nut is screwed in, significantly improving the anti-loosening ability of the screw under high vibration conditions and ensuring the stability and safety of the fastening connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of an improved anti-loosening screw structure of the present utility model;

[0018] Figure 2 is a schematic diagram of the non-uniform pitch section structure of the screw rod of the present utility model;

[0019] Figure 3 is a schematic diagram of the elastic self-locking assembly structure of the present utility model;

[0020] Figure 4 is a schematic diagram of the annular groove and protrusion structure on the inner wall of the nut of the present utility model;

[0021] Figure 5 is a schematic diagram of the installation of the sealing ring and the limiting ring of the present utility model.

[0022] In the figure: 1, screw rod; 2, nut; 101, non-uniform pitch section; 3, elastic self-locking assembly; 301, elastic claw; 4, annular groove; 5, protrusion; 6, limiting ring; 7, anti-slip pattern; 8, corrosion-resistant coating; 9, sealing ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0024] Please refer to Figures 1 - 5 as shown, a technical solution provided by the present utility model is as follows:

[0025] An improved anti-loosening screw structure includes a screw rod, a nut, and an elastic self-locking assembly. The screw rod is provided with a non-uniform pitch section. The elastic self-locking assembly includes a plurality of elastic claws. The inner wall of the nut is provided with an annular groove and a protrusion that cooperate with the elastic claws. When the nut is screwed onto the screw rod, the elastic claws are engaged with the annular groove and the protrusion to achieve the anti-loosening function of the nut

[0026] Embodiment 1: Overall structure of the screw

[0027] An improved anti-loosening screw structure of the present utility model includes a screw rod (1), a nut (2), a non-uniform pitch section (101), an elastic self-locking assembly (3), and a limit ring (6). The non-uniform pitch section (101) of the screw rod (1) has an increasing pitch from top to bottom to increase the frictional force when the nut is screwed in and enhance the anti-loosening effect. The inner wall of the nut (2) is provided with an annular groove (4) and a protrusion (5), and is cooperatively locked with the elastic self-locking assembly (3).

[0028] Embodiment 2: Design of the elastic self-locking assembly

[0029] As Figure 3 shown, the elastic self-locking assembly (3) is composed of three elastic claws (301), which are evenly distributed in the annular groove (4) inside the nut (2). When the nut is screwed onto the screw rod, the elastic claws come into contact with the protrusion (5) and undergo elastic deformation, increasing the locking effect and preventing loosening

[0030] Embodiment 3: Design of anti-slip patterns

[0031] To further enhance the frictional force during the process of screwing the nut, the inner wall of the nut (2) is designed with anti-slip patterns (7), which increase the friction through the texture, making the nut not easy to loosen after being tightened and improving the anti-slip effect

[0032] Embodiment 4: Corrosion-resistant coating

[0033] The surface of the screw rod (1) is provided with a corrosion-resistant coating (8), which effectively prevents the screw rod from rusting in high-humidity or corrosive environments, ensuring that the screw still maintains a tight state in harsh environments and extending its service life

[0034] Embodiment 5: Installation of the sealing ring and the limit ring

[0035] As Figure 5 shown, the top of the nut (2) is provided with a sealing ring (9), which plays a sealing and protective role when the nut is screwed in, preventing dust or moisture from entering the thread part and maintaining the fastening performance of the screw

[0036] The foregoing has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments, and the above embodiments and the descriptions in the specification are only preferred examples of the present utility model, and are not used to limit the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. An improved anti-loosening screw structure, characterized in that: It includes a screw rod (1), a nut (2) and an elastic self-locking component (3). The screw rod (1) is provided with a non-uniform pitch section (101). The elastic self-locking component (3) includes a plurality of elastic claws (301). The inner wall of the nut (2) is provided with an annular groove (4) and a protrusion (5) that cooperate with the elastic claws (301). When the nut (2) is screwed onto the screw rod (1), the elastic claws (301) are engaged with the annular groove (4) and the protrusion (5) to achieve the anti-loosening function of the nut (2).

2. The anti-loosening screw structure according to claim 1, characterized in that: The pitch of the non-uniform pitch section (101) gradually increases along the length direction of the screw rod (1) to gradually increase the locking force during the process of screwing the nut (2).

3. The anti-loosening screw structure according to claim 1, wherein: The number of the elastic claws (301) is three, and they are evenly distributed in the annular groove (4) on the inner wall of the nut (2).

4. The anti-loosening screw structure according to claim 1, wherein: The depth of the annular groove (4) on the inner wall of the nut (2) is 0.2 to 0.5 millimeters to maintain the engaging effect of the elastic claws (301).

5. The anti-loosening screw structure according to claim 1, wherein: A limiting ring (6) is provided at the end of the screw rod (1) to prevent the nut (2) from slipping out of the tail end of the screw rod (1).

6. The anti-loosening screw structure according to claim 1, characterized in that: Anti-slip patterns (7) are provided inside the nut (2) to increase the friction force when the nut (2) is screwed and prevent loosening.

7. The anti-loosening screw structure according to claim 1, characterized in that: The elastic claws (301) are made of wear-resistant alloy material to extend the service life of the claws.

8. The anti-loosening screw structure according to claim 1, wherein: The surface of the screw rod (1) is coated with a corrosion-resistant coating (8) to improve the corrosion resistance of the screw rod in a high-humidity environment.

9. The anti-loosening screw structure according to claim 1, characterized in that: A sealing ring (9) is provided at the top of the nut (2) to prevent external pollutants from entering the threaded connection part.

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