An endless locking self-adapting screw anti-loosening device

Abstract

The utility model discloses a kind of self-adapting screw anti-loose devices of endless locking, comprising: fixed base, inner spin component, needle curtain component and ball assembly, fixed base is used to be fixed in screw installation, and the middle part is provided with through-hole;Inner spin component is set in the through-hole of fixed base;When using, it is capped above screw, and is adhered screw by needle curtain component;The end of inner spin component away from screw protrudes fixed base, forms rotating head;Ball assembly is set on the inside of fixed base, for limiting screw loosening.The device is realized multiple models self-adapting clamping by needle curtain structure, ball assembly provides mechanical level one-way locking, and the double anti-loose mechanism of " physical adhesion + motion restriction " is formed by combination, limit screw only can rotate along fastening direction, when reverse rotation, it cannot loosen due to spring ball lock. Without modification to screw, it can be directly sleeved into existing screw, installation efficiency is improved, and without complex internal structure, cost can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of screw anti-loosening technology, specifically to an adaptive screw anti-loosening device with stepless locking. Background Technology

[0002] Threaded connections are the most commonly used connection method in the mechanical field, and their anti-loosening performance directly affects the reliability of equipment. Traditional anti-loosening methods (such as spring washers, double nuts, nylon lock nuts, etc.) have problems such as poor versatility, the need to match screw specifications, and susceptibility to environmental corrosion.

[0003] CN 120487747 A discloses an anti-loosening screw assembly, which includes a screw and a nut. When the screw is about to loosen due to vibration, the nut and the threads with different pitches will generate an opposite axial force to prevent the screw from loosening. However, this assembly requires the purchase and use of special screws and nuts, and is not practical without changing the existing screws.

[0004] Therefore, there is a need for an anti-loosening device that can adapt to various screws, so as to achieve rapid adaptation and stable anti-loosening of screws in mixed assembly scenarios with multiple screw specifications. Utility Model Content

[0005] To address the aforementioned problems, this invention provides an adaptive screw anti-loosening device with stepless locking. It utilizes a pin curtain structure for adaptive clamping of various screw sizes, while a ball bearing assembly provides mechanical one-way locking. The combination of these two elements forms a dual anti-loosening mechanism of "physical contact + motion restriction," limiting screw rotation to the tightening direction only. Reverse rotation is prevented by the spring-loaded ball bearings locking the screw. No screw modification is required; existing screws can be directly fitted, improving installation efficiency. Compared to existing built-in anti-loosening devices, it eliminates the need for complex internal structures, reducing costs.

[0006] Specifically, this utility model is implemented as follows:

[0007] An adaptive screw anti-loosening device with stepless locking, comprising:

[0008] A mounting base is used to fix the screw installation point, and a through hole is provided in the middle of the base;

[0009] An inner rotating component is disposed within a through hole in a fixed base; in use, it covers the screw; the end of the inner rotating component away from the screw extends out of the fixed base, forming a rotating head;

[0010] The needle curtain assembly is mounted on the inner rotating assembly and is configured as a retractable structure, which fits the screw during use;

[0011] A ball bearing assembly, disposed inside the fixed base, is used to prevent screws from loosening.

[0012] Furthermore, the internal rotation assembly includes:

[0013] The inner sleeve has several needle curtain grooves at its bottom; the end of the inner sleeve near the screw has a needle curtain cavity.

[0014] The rotating head is an external rotating head.

[0015] Furthermore, the needle curtain assembly includes: a plurality of steel needle groups, each group of steel needles corresponding to a needle curtain groove; the steel needle group includes:

[0016] The first spring is disposed within the needle groove;

[0017] A steel needle is connected to a first spring; in use, the steel needle compresses the first spring to fit against the screw.

[0018] Further, the ball assembly includes:

[0019] The second spring is located in a groove on the inner wall of the fixed base;

[0020] A ball bearing is located between the second spring and the inner rotating sleeve. During use, the ball bearing is pressed against the outer surface of the inner rotating sleeve.

[0021] Furthermore, the groove is arranged at an angle, and the surface of the inner sleeve is provided with an equilateral triangular groove. When the screw drives the inner sleeve to rotate in the loosening direction, the ball is embedded in the equilateral triangular groove.

[0022] Furthermore, the equilateral triangular groove is an equilateral triangle structure with a side length of 1mm.

[0023] Working principle:

[0024] During installation, the mounting base 1 is fixed to the device panel with screws. The screw requiring anti-loosening is placed into the needle curtain cavity at the bottom of the inner rotating sleeve 2. The steel needle compresses the spring, causing displacement and deformation to fit the screw head. Using a wrench, the outer rotating head 3 is rotated clockwise. The outer rotating head 3 drives the inner rotating sleeve 2 to rotate, and the ball bearing 5 slides without resistance, ensuring the screw is properly tightened. When the screw attempts to rotate counterclockwise (in the direction of loosening) due to vibration or other reasons, the screw drives the inner rotating sleeve 2 to rotate counterclockwise. The ball bearing 5, under the action of the spring 6, embeds into the equilateral triangular groove of the inner rotating sleeve 2, forcibly locking the movement of the inner rotating sleeve 2 and preventing the screw from rotating in the opposite direction. To remove the screw, remove the screws from the mounting base 1. The device is then lifted upwards, and the needle curtain detaches from the screw head, completing the disassembly. During disassembly, the needle curtain is pushed back to its initial position under the action of elasticity, ready for the next use.

[0025] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0026] (1) This utility model can be directly fitted into existing screws without replacing or modifying existing screws, which can effectively reduce costs.

[0027] (2) The needle curtain self-adaptive structure can be adapted to various screw specifications (such as M4-M16), which can improve the adaptability of the device.

[0028] (3) The device achieves stepless adjustment. Through the one-way locking characteristics of the second spring and the ball, the screw can only rotate in the tightening direction. When rotating in the opposite direction, it is locked and cannot be loosened, thus solving the problem of universal anti-loosening in various scenarios. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the self-adaptive screw anti-loosening device with stepless locking in Example 1;

[0030] Figure 2 This is a vertical cross-sectional view of the self-adaptive screw anti-loosening device with stepless locking in Example 1;

[0031] Figure 3 This is a horizontal cross-sectional view of the self-adaptive screw anti-loosening device with stepless locking in Example 1.

[0032] Figure label:

[0033] 1-Fixed base; 11-Groove; 2-Inner rotating sleeve; 21-Equilateral triangular groove; 3-Outer rotating head; 41-First spring; 42-Steel needle; 5-Ball bearing; 6-Second spring; 7-Anti-loosening screw. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0035] Example 1

[0036] like Figure 1-3As shown, this embodiment provides an adaptive screw anti-loosening device with stepless locking, including: a fixed base 1, an inner rotating assembly, a needle curtain assembly, and a ball assembly. The fixed base 1 locks the plane where the screw 7 to be anti-loosened is located by screws. The inner rotating assembly is an inner rotating sleeve 2, which is set in the through hole of the fixed base 1. The upper end of the inner rotating sleeve 2 is fixedly connected to the outer rotating head 3, and the lower end is provided with a needle curtain cavity. Several needle curtain grooves are evenly distributed in the needle curtain cavity to install the needle curtain assembly. The needle curtain assembly includes: several steel needle groups, each group of steel needles corresponding to a needle curtain groove. The steel needle group includes: a first spring 41 and a steel needle 42. The first spring 41 is placed at the bottom of the needle curtain groove, and the steel needle 42 is located between the first spring 41 and the screw 7 to be anti-loosened, so that the steel needle 42 can move up and down, thereby forming a clamping cavity in the needle curtain cavity, which wraps around the head of the anti-loosening screw 7. The needle curtain formed by the first spring 41 and the steel needle 42 is used to adapt to screws 7 of different specifications to be anti-loosened. Specifically, the steel needle is made of 65Mn spring steel with surface carburizing treatment, has a diameter of 1mm and a length of 10mm. The first spring 41 is a miniature spring, which is evenly distributed in the needle curtain groove of the inner screw sleeve. It can move radially according to the shape of the screw head to form a needle curtain wrapping effect, which is suitable for screws of various specifications.

[0037] The ball bearing assembly has three sets, with three cylindrical grooves 11 evenly distributed on the fixed base 1. Each set of ball bearing assemblies corresponds to one groove 11, and the grooves 11 face counterclockwise (in this embodiment, clockwise is the tightening direction, and counterclockwise is the loosening direction). The ball bearing assembly includes a second spring 6 and a ball bearing 5. The ball bearing 5 is located between the second spring 6 and the inner rotating sleeve 2. The inner rotating sleeve 2 has evenly distributed equilateral triangular grooves 21, which are equilateral triangle structures with a side length of 1mm. When rotating clockwise, the ball bearing 5 can slide along the inclined surface of the equilateral triangular groove 21 with little resistance; when rotating counterclockwise, the ball bearing 5 is stuck by the steep surface of the equilateral triangular groove 21. The pressure of the second spring 6 causes the ball bearing 5 to embed into the groove, forming a one-way mechanical lock, thereby forcibly locking the movement of the inner rotating sleeve 2 and preventing the anti-loosening screw 7 from rotating in the opposite direction and loosening.

[0038] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A self-adaptive screw anti-loosening device with stepless locking, characterized in that, include: A fixed base (1) is used to fix it at the screw mounting point, and a through hole is provided in the middle of the base; An inner rotating component is disposed in the through hole of the fixed base (1); in use, it covers the screw; the end of the inner rotating component away from the screw extends out of the fixed base (1) to form a rotating head; The needle curtain assembly is mounted on the inner rotating assembly and is configured as a retractable structure, which fits the screw during use; A ball bearing assembly is disposed inside the fixed base (1) to prevent screw loosening.

2. The self-adaptive screw anti-loosening device with stepless locking as described in claim 1, characterized in that, The internal rotation component includes: The inner sleeve (2) has several needle curtain grooves at its bottom; the inner sleeve (2) has a needle curtain cavity at one end near the screw; The rotating head is an external rotating head (3).

3. The self-adaptive screw anti-loosening device with stepless locking as described in claim 2, characterized in that, The needle curtain assembly includes: a plurality of steel needle groups, each group of steel needles corresponding to a needle curtain groove; the steel needle group includes: The first spring (41) is disposed in the needle groove; A steel needle (42) is connected to a first spring (41); in use, the steel needle (42) compresses the first spring (41) to fit the screw.

4. The self-adaptive screw anti-loosening device with stepless locking as described in claim 1, characterized in that, The ball assembly includes: The second spring (6) is located in the groove (11) on the inner wall of the fixed base (1); The ball (5) is located between the second spring (6) and the inner sleeve (2). When in use, the ball (5) is pressed against the outer surface of the inner sleeve (2).

5. The self-adaptive screw anti-loosening device with stepless locking as described in claim 4, characterized in that, The groove (11) is arranged in an inclined shape, and the inner sleeve (2) has several equilateral triangular grooves (21) evenly distributed on its surface. When the screw drives the inner sleeve (2) to rotate in the loosening direction, the ball (5) is embedded in the equilateral triangular groove (21).

6. The self-adaptive screw anti-loosening device with stepless locking as described in claim 5, characterized in that, The equilateral triangular groove (21) is an equilateral triangle structure with a side length of 1 mm.

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