Anti-loosening fastening screw

Abstract

The utility model belongs to the field of fasteners, and particularly relates to an anti-loosening fastening screw which comprises a screw body, the surface of the screw body is in threaded connection with a nut, the bottom of the screw body is provided with an insertion groove, and the bottom of the nut is fixedly connected with a limiting assembly. The limiting assembly comprises a bottom plate, the bottom plate is located at the bottom of the screw body, a connecting frame is fixedly connected between the top of the bottom plate and the nut, a limiting column is fixedly connected to the top of the bottom plate, and the top of the limiting column extends into an inner cavity of the inserting groove and is sequentially sleeved with a plurality of limiting rings. By arranging the limiting assembly, when the nut is installed, the limiting column in the nut can be inserted into the inner cavity of the screw body, and the limiting block is limited through cooperation of the limiting ring, so that the installed nut can be limited, the nut is prevented from loosening and being separated from the surface of the screw body, and the stability after the screw body and the nut are connected is improved.

Description

Technical Field

[0001] This utility model relates to the field of fasteners, specifically a fastening screw designed to prevent loosening. Background Technology

[0002] Screws are a general term for fasteners. They are indispensable industrial necessities in daily life. For example, tiny screws are used in cameras, eyeglasses, watches, and electronics, while general screws are used in televisions, electrical products, musical instruments, and furniture. Large screws and nuts are used in engineering, construction, and bridges, and both large and small screws are used in transportation equipment, airplanes, trams, and automobiles. Screws play an important role in industry, and as long as industry exists on Earth, the function of screws will always be important.

[0003] Existing screws typically require the use of nuts. However, after the nut is installed on the screw surface through threaded engagement, it lacks an anti-loosening and limiting function. Over time, the nut is prone to loosening, causing it to detach from the screw and affecting the safety of its use. Therefore, an anti-loosening fastening screw is proposed to address the above problems. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology and solve the problem that fastening screws in the existing technology are prone to loosening, this utility model proposes a fastening screw that prevents loosening.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a fastening screw that prevents loosening, including a screw body, a nut threadedly connected to the surface of the screw body, a slot provided at the bottom of the screw body, and a limit component fixedly connected to the bottom of the nut;

[0006] The limiting assembly includes a base plate located at the bottom of the screw body. A connecting frame is fixedly connected between the top of the base plate and the nut. A limiting post is fixedly connected to the top of the base plate. The top of the limiting post extends into the inner cavity of the slot and is fitted with several limiting rings in sequence. The surface of the limiting rings is fixedly connected to the inner wall of the slot. Movable blocks are provided on both sides of the top of the inner cavity of the limiting post. A limiting block is fixedly connected to the opposite side of the two movable blocks. One side of the limiting block extends through to the outside of the limiting post. Tension springs are fixedly connected to the opposite sides of the two movable blocks. A fixing block is fixedly connected between the two tension springs. The surface of the fixing block is fixedly connected to the inner wall of the limiting post. An adjusting block is fixedly connected to the bottom of the movable block. A pressure block is provided between the two adjusting blocks. A lifting block is fixedly connected to the bottom of the pressure block. A pull rod is fixedly connected to the bottom of the lifting block. A spring is fitted on the surface of the pull rod. The bottom of the pull rod extends through to the bottom of the base plate.

[0007] Preferably, the top and bottom of the spring are fixedly connected to the inner wall of the limiting post and the lifting block, respectively, and the limiting block is trapezoidal in shape.

[0008] Preferably, the surface of the limiting block is in contact with the surface of the limiting ring, and the surface of the limiting post is in contact with the limiting ring.

[0009] Preferably, a pull block is fixedly connected to the bottom of the pull rod, and the number of connecting brackets is three.

[0010] Preferably, the pressure block is trapezoidal in shape, and the surface of the pressure block is in contact with the two adjusting blocks respectively.

[0011] Preferably, the top of the screw body is provided with an operating groove, and the operating groove is hexagonal in shape.

[0012] Preferably, the surface of the movable block is slidably connected to the inner wall of the limiting post, and the surface of the lifting block is slidably connected to the inner wall of the limiting post.

[0013] The advantages of this utility model are:

[0014] 1. By setting a limiting component, this utility model allows the limiting post to be inserted into the inner cavity of the screw body while the nut is being installed. The limiting ring then restricts the limiting block, thereby limiting the installed nut and preventing it from loosening and detaching from the surface of the screw body, thus improving the stability of the connection between the screw body and the nut.

[0015] 2. This utility model, by setting a spring, facilitates the upward movement and resetting of the lifting block and pressure block; by setting a limiting block, it can be locked onto the surface of the limiting ring, thereby restricting the limiting post; by setting a limiting ring, it can restrict the position of the limiting block; by setting a pull block, it facilitates the user to pull the pull rod; by setting three connecting brackets, it facilitates the connection between the base plate and the nut; by setting a pressure block, it can be used to squeeze the adjusting block, facilitating the adjustment of the adjusting block; by setting an operating groove, it facilitates the user to operate the screw body; and by setting a moving block, it facilitates the movement of the limiting block. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a cross-sectional view of the nut of this utility model;

[0019] Figure 3 This is a schematic diagram of the limiting component of this utility model;

[0020] Figure 4 This is a cross-sectional view of the limiting post of this utility model;

[0021] Figure 5 For the present utility model Figure 4 Enlarged view of the structure at point A in the middle.

[0022] In the diagram: 1. Screw body; 2. Nut; 3. Limiting assembly; 301. Base plate; 302. Connecting frame; 303. Limiting post; 304. Limiting ring; 305. Moving block; 306. Limiting block; 307. Tension spring; 308. Fixing block; 309. Adjusting block; 310. Pressure block; 311. Lifting block; 312. Pull rod; 313. Spring; 314. Pull block; 4. Slot; 5. Operating slot. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0024] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0025] This application discloses an anti-loosening fastening screw. (Refer to...) Figures 1-5 A type of anti-loosening fastening screw includes a screw body 1, a nut 2 threadedly connected to the surface of the screw body 1, a slot 4 provided at the bottom of the screw body 1, and a limit component 3 fixedly connected to the bottom of the nut 2.

[0026] The limiting component 3 includes a base plate 301, which is located at the bottom of the screw body 1. A connecting bracket 302 is fixedly connected between the top of the base plate 301 and the nut 2. A limiting post 303 is fixedly connected to the top of the base plate 301. The top of the limiting post 303 extends into the inner cavity of the slot 4 and is fitted with several limiting rings 304 in sequence. The surface of the limiting rings 304 is fixedly connected to the inner wall of the slot 4. Moving blocks 305 are provided on both sides of the top of the inner cavity of the limiting post 303. A limiting block 306 is fixedly connected to the opposite side of the two moving blocks 305. One side of the limiting block 306 extends to the outside of the limiting post 303. A tension spring 307 is fixedly connected to the opposite side of the two moving blocks 305. A fixing block 308 is fixedly connected between the two tension springs 307. The surface is fixedly connected to the inner wall of the limiting post 303. The bottom of the moving block 305 is fixedly connected to the adjusting block 309. A pressure block 310 is provided between the two adjusting blocks 309. The bottom of the pressure block 310 is fixedly connected to the lifting block 311. The bottom of the lifting block 311 is fixedly connected to the pull rod 312. A spring 313 is sleeved on the surface of the pull rod 312. The bottom of the pull rod 312 extends through to the bottom of the base plate 301. By setting the limiting component 3, the limiting post 303 can be inserted into the inner cavity of the screw body 1 while the nut 2 is being installed. The limiting block 306 is restricted by the limiting ring 304. This can limit the nut 2 after installation, prevent the nut 2 from loosening and detaching from the surface of the screw body 1, and improve the stability of the connection between the screw body 1 and the nut 2.

[0027] Reference Figure 2 , Figure 4 and Figure 5 The top and bottom of the spring 313 are fixedly connected to the inner wall of the limiting post 303 and the lifting block 311, respectively. The limiting block 306 is trapezoidal in shape, and the surface of the limiting block 306 contacts the surface of the limiting ring 304. The surface of the limiting post 303 contacts the limiting ring 304. By setting the spring 313, the lifting block 311 and the pressure block 310 can be moved upward to reset. By setting the limiting block 306, it can be locked on the surface of the limiting ring 304, thereby limiting the limiting post 303. By setting the limiting ring 304, the position of the limiting block 306 can be limited.

[0028] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 Pull blocks 314 are fixedly connected to the bottom of the pull rod 312, and there are three connecting brackets 302. By setting pull blocks 314, it is easy for users to pull the pull rod 312. By setting three connecting brackets 302, it is easy to connect the base plate 301 and the nut 2.

[0029] Reference Figure 1 , Figure 4and Figure 5 The pressure block 310 is trapezoidal in shape, and its surface contacts the two adjusting blocks 309 respectively. The top of the screw body 1 is provided with an operating groove 5, which is hexagonal in shape. The surface of the moving block 305 is slidably connected to the inner wall of the limiting post 303, and the surface of the lifting block 311 is slidably connected to the inner wall of the limiting post 303. By setting the pressure block 310, it can be used to press the adjusting block 309, which facilitates the adjustment of the adjusting block 309. By setting the operating groove 5, it is convenient for the user to operate the screw body 1. By setting the moving block 305, it is convenient for the limiting block 306 to move.

[0030] Working principle: The user can connect the nut 2 to the screw body 1 through the threaded engagement. As the nut 2 rotates, it moves upwards on the surface of the screw body 1. The nut 2, through the engagement of the connecting bracket 302 and the base plate 301, drives the limiting post 303 upwards to insert into the slot 4. When the limiting post 303 moves upwards, the limiting blocks 306 on both sides are squeezed by the limiting ring 304 and move towards the center. The limiting blocks 306 drive the two moving blocks 305 to move towards the center. The moving blocks 305 drive the adjusting block 309 to move and squeeze the pressure block 310, causing the pressure block 310 to move downwards. The pressure block 310 drives the lifting block 311 to move downwards until the limiting block 306 moves above the limiting ring 304. Because the elastic force of the spring 313 is greater than the tension of the tension spring 307, the spring 313 returns to its original position. Through the engagement of the lifting block 311, the pressure block 310 moves upwards and squeezes the adjusting block 309, causing the two adjusting blocks 309 to move away from each other. 9. The movement block 305 moves the two limit blocks 306 away from each other. At this time, the limit ring 304 can restrict the limit blocks 306. Since the limit blocks 306 are trapezoidal, the limit ring 304 will not affect the upward movement of the limit post 303. The cooperation between the limit ring 304 and the limit blocks 306 can prevent the limit post 303 from moving downward. The cooperation between the limit post 303, the base plate 301 and the connecting frame 302 can prevent the nut 2 from moving downward, thus preventing loosening. When it is necessary to remove the nut 2, simply pull the pull rod 312 downward. The pull rod 312, through the cooperation of the lifting block 311, moves the pressure block 310 downward to release the pressure on the adjusting block 309. At this time, the tension spring 307 resets and moves the two movement blocks 305 towards the middle. The movement blocks 305 move the two limit blocks 306 towards the middle, which can release the restriction of the limit ring 304 on the limit blocks 306. Then, the nut 2 can be removed by reversing it.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A fastening screw designed to prevent loosening, characterized in that: Includes a screw body (1), the surface of which is threaded with a nut (2), the bottom of which is provided with a slot (4), and the bottom of which is fixedly connected with a limit assembly (3); The limiting component (3) includes a base plate (301) located at the bottom of the screw body (1). A connecting bracket (302) is fixedly connected between the top of the base plate (301) and the nut (2). A limiting post (303) is fixedly connected to the top of the base plate (301). The top of the limiting post (303) extends into the inner cavity of the slot (4) and is fitted with several limiting rings (304) in sequence. The surface of the limiting rings (304) is fixedly connected to the inner wall of the slot (4). Movable blocks (305) are provided on both sides of the top of the inner cavity of the limiting post (303). A limiting block (306) is fixedly connected to the opposite side of the two movable blocks (305). One side of the limiting block (306) extends through to... On the outside of the limiting post (303), two moving blocks (305) are fixedly connected to opposite sides with tension springs (307), and a fixing block (308) is fixedly connected between the two tension springs (307). The surface of the fixing block (308) is fixedly connected to the inner wall of the limiting post (303). An adjusting block (309) is fixedly connected to the bottom of the moving block (305). A pressure block (310) is provided between the two adjusting blocks (309). A lifting block (311) is fixedly connected to the bottom of the pressure block (310). A pull rod (312) is fixedly connected to the bottom of the lifting block (311). A spring (313) is sleeved on the surface of the pull rod (312). The bottom of the pull rod (312) extends through to the bottom of the base plate (301).

2. The anti-loosening fastening screw according to claim 1, characterized in that: The top and bottom of the spring (313) are fixedly connected to the inner wall of the limiting post (303) and the lifting block (311) respectively, and the limiting block (306) is trapezoidal in shape.

3. The anti-loosening fastening screw according to claim 1, characterized in that: The surface of the limiting block (306) is in contact with the surface of the limiting ring (304), and the surface of the limiting post (303) is in contact with the limiting ring (304).

4. The anti-loosening fastening screw according to claim 1, characterized in that: The bottom of the pull rod (312) is fixedly connected to a pull block (314), and the number of the connecting brackets (302) is three.

5. The anti-loosening fastening screw according to claim 1, characterized in that: The pressure block (310) is trapezoidal in shape, and the surface of the pressure block (310) is in contact with the two adjusting blocks (309) respectively.

6. The anti-loosening fastening screw according to claim 1, characterized in that: The top of the screw body (1) is provided with an operating groove (5), which is hexagonal in shape.

7. The anti-loosening fastening screw according to claim 1, characterized in that: The surface of the moving block (305) is slidably connected to the inner wall of the limiting post (303), and the surface of the lifting block (311) is slidably connected to the inner wall of the limiting post (303).

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