Anti-loosening screw fastener

Abstract

The utility model discloses an anti-loosening screw fastener which comprises a screw, the screw is sleeved with a nut in a threaded mode, a groove is formed in the bottom face of the screw, a plurality of gaps are formed in the side wall of the groove, an abutting ball is arranged below the screw, and the abutting ball can force the side wall of the groove to be turned outwards and bent. The groove is formed in the bottom face of the screw, the gaps are formed in the side wall of the groove, and therefore the side wall of the groove can be turned outwards and bent under the action of external force, a nut arranged on the screw in a threaded and sleeved mode can be blocked, and the nut is prevented from being loosened and disengaged in the vibration and impact environment.

Description

Technical Field

[0001] The utility model relates to the technical field of screws, in particular to a screw fastener with anti-loosening function. Background Art

[0002] As a common fastener, screws can tightly connect different components together to form a stable structure, and prevent the connected components from separating under stress or vibration by providing strong clamping force.

[0003] During the operation of the equipment, due to the influence of factors such as vibration, impact, and temperature change, the screws may gradually loosen. If the screws loosen, the clamping force between the connected components will decrease, resulting in an insecure connection and even potentially causing equipment failures or accidents.

[0004] To solve the problem of screw loosening, currently, various anti-loosening measures for screws are included in the disclosed technologies. For example, a ring of nylon material is embedded around the internal thread of the nut, a spring washer is sleeved on the screw, etc. When the screw is tightened, the nylon material, spring washer, etc. deform, thereby achieving interference fit of the nut, increasing the friction between the screw and the nut, and playing an anti-loosening role. Sleeving a washer on the screw is a relatively common method. Specifically, reference can be made to a long-term anti-loosening screw disclosed in a Chinese patent with the publication number CN117450159A, which includes a gear screw, a boss groove nut, a gear snap ring, and an internal snap ring. The present invention is a long-term anti-loosening screw; the end of the gear screw has a uniform distribution of gear teeth. The top of the boss groove nut has a uniform distribution of grooves and an internal snap ring groove. The gear snap ring has a uniform distribution of spring pieces. The internal snap ring. The present invention is a long-term anti-loosening screw; first, the gear snap ring is sleeved on the boss groove nut and the spring pieces fall into the grooves, then the internal snap ring is snapped into the internal snap ring groove and pressed on the spring pieces. Then the assembled nut assembly is screwed onto the gear screw so that the spring pieces of the gear snap ring are stuck in the gears of the gear screw.

[0005] Although using washers can increase the friction between the nut and the screw, when the equipment is in a state of long-term vibration and impact, the acting force generated by vibration and impact can offset the friction between the nut and the screw, ultimately resulting in the nut detaching from the screw and becoming loose. Content of the Utility Model

[0006] The purpose of the present utility model is to provide a screw fastener with anti-loosening function, aiming to improve the problem that the existing nut and screw have a poor effect of increasing their mutual friction through washers to avoid the nut detaching from the screw.

[0007] The present utility model is realized as follows: A screw fastener for preventing loosening includes a screw, on which a nut is threadedly sleeved, and a groove is provided on the bottom surface of the screw. A plurality of slits are provided on the side wall of the groove, and a pressing ball is provided below the screw, and the pressing ball can force the side wall of the groove to turn outwards and bend.

[0008] Preferably, connecting rods are symmetrically and fixedly provided on both sides of the pressing ball, and a ring plate is connected to the tops of the two connecting rods.

[0009] Preferably, the outer diameter of the ring plate is less than or equal to the diameter of the nut, and the ring plate is arranged above the nut.

[0010] Preferably, the distance between the two connecting rods is slightly larger than the diameter of the nut, and the connecting rods can penetrate through the slits.

[0011] Preferably, the groove is arranged in a frustum structure, and the height of the groove is equal to the height of the slit; the diameter of the pressing ball is greater than or equal to the inner diameter of the bottom of the groove.

[0012] Preferably, a plurality of washers stacked up and down are further arranged between the ring plate and the nut, and concave grooves and convex teeth are respectively arranged on the mutually contacting side surfaces of two adjacent washers, and the concave grooves and the convex teeth are meshed and connected.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. The present utility model provides a groove on the bottom surface of the screw, and a plurality of slits are provided on the side wall of the groove. Therefore, the side wall of the groove can turn outwards and bend under the action of an external force, and further can block the nut threadedly sleeved on the screw to prevent it from loosening and falling off in a vibrating and impact environment.

[0015] 2. The present utility model is provided with a pressing ball, on which connecting rods are fixedly arranged, and a ring plate is fixedly arranged at the top of the connecting rods. At the same time, the ring plate is arranged on the nut, and can drive the pressing ball to move during the rising process of the nut. Under the action of the pressing ball, the side wall of the groove is forced to turn outwards and bend, and the restriction on the nut can be realized.

[0016] 3. The present utility model is provided with washers, which can fill the gap between the nut and the ring plate according to requirements. Furthermore, in different installation environments, the nut can be stably installed at the bottom of the screw, providing convenience for restricting the position of the nut through the side wall of the groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the first overall structural schematic diagram of the present utility model;

[0018] Figure 2 is the first structural schematic diagram of the screw of the present utility model;

[0019] Figure 3 is the second structural schematic diagram of the screw of the present utility model;

[0020] Figure 4 is a schematic structural view of the anti-loosening component of the present utility model;

[0021] Figure 5 is a schematic structural view of the second part of the whole of the present utility model;

[0022] Figure 6 is a schematic structural view of the washer of the present utility model.

[0023] In the figure: 1, screw; 11, gap; 12, frustum structure; 2, nut; 3, anti-loosening component; 31, connecting rod; 32, ring plate; 33, pressing ball; 4, washer; 41, concave groove; 42, convex tooth. Detailed implementation manners

[0024] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0025] The following will be further described in conjunction with the drawings and specific embodiments:

[0026] Embodiment 1

[0027] In order to avoid the nut from detaching due to the screw being in a vibrating and impact environment for a long time, which affects the stability of the equipment, in this embodiment, the existing screw is improved to enhance its anti-vibration and anti-impact capabilities, and to prevent the nut from easily detaching due to being in a vibrating and impact environment for a long time. The specific technical solution is as follows.

[0028] As Figure 1-4As shown in the figure, a nut 2 is threadedly sleeved on a screw 1, and a groove is provided on the bottom surface of the screw 1. The groove can be set as a frustum structure 12 or a cylindrical structure. In addition, a plurality of slits 11 are provided on the side wall of the groove. The plurality of slits 11 are evenly distributed along the circumferential direction of the screw 1. Each slit 11 is arranged along the height direction of the groove, and the height is equal to the height of the groove. In addition, a loosening prevention component 3 is provided below the screw 1. The loosening prevention component 3 includes a pressing ball 33, a connecting rod 31 and an annular plate 32. The connecting rod 31 has two roots and is symmetrically arranged on both sides of the pressing ball 33. The annular plate 32 is fixedly arranged on the tops of the two connecting rods 31. In addition, the annular plate 32 is located above the nut 2, and the two connecting rods 31 are distributed outside the nut 2. When using the screw 1, first sleeve the annular plate 32 on the screw 1, and then place the nut 2 between the two connecting rods 31 and threadedly sleeve it on the bottom of the screw 1. When a rotational force is applied to the nut 2 to cause it to rise, the annular plate 32 can be driven to rise at the same time, and the pressing ball 33 rises in the groove, forcing the side wall of the groove to turn outwards and bend, so that when the nut 2 stops rotating, the reverse movement channel of the nut 2 can be blocked by the side wall of the groove. The outward turning of the side wall of the groove can also be achieved by hammering.

[0029] The diameter of the pressing ball 33 can be determined according to requirements. Specifically, when the groove is set as a cylindrical structure, the diameter of the pressing ball 33 is greater than the inner diameter of the groove. When the groove is set as a frustum structure 12, the diameter of its bottom is greater than the diameter of its top. At the same time, the diameter of the pressing ball 33 is greater than or equal to the diameter of the bottom of the groove. In any case, during the rising process of the pressing ball 33, the side wall of the groove will turn outwards and bend.

[0030] To facilitate the rising of the pressing ball 33, the width of the slit 11 is greater than or equal to the size of the connecting rod 31. In this case, the connecting rod 31 passes through the slit 11 and can drive the pressing ball 33 to rise and fall in the groove.

[0031] Since the distance between the two connecting rods 31 is slightly greater than the diameter of the nut 2, therefore, after the annular plate 32 is sleeved on the screw 1, the nut can be completely inserted between the two connecting rods 31.

[0032] Embodiment 2

[0033] In order to avoid the nut falling off due to the screw being in a vibrating and impact environment for a long time, which affects the stability of the equipment, this embodiment improves the existing screw to enhance its anti-vibration and anti-impact capabilities and avoid the nut falling off easily due to being in a vibrating and impact environment for a long time. The specific technical solution is as follows.

[0034] Such as Figure 1-4As shown in the figure, a nut 2 is threadedly sleeved on a screw 1, and a groove is provided on the bottom surface of the screw 1. The groove can be set as a frustum structure 12 or a cylindrical structure. Additionally, a plurality of slits 11 are provided on the side wall of the groove. The plurality of slits 11 are evenly distributed along the circumferential direction of the screw 1. Each slit 11 is arranged along the height direction of the groove, and the height is equal to the height of the groove. Further, a locking component 3 is provided below the screw 1. The locking component 3 includes a pressing ball 33, a connecting rod 31, and an annular plate 32. The connecting rod 31 has two roots and is symmetrically arranged on both sides of the pressing ball 33. The annular plate 32 is fixedly arranged on the tops of the two connecting rods 31. Additionally, the annular plate 32 is located above the nut 2, and the two connecting rods 31 are distributed outside the nut 2. When using the screw 1, first sleeve the annular plate 32 on the screw 1, then place the nut 2 between the two connecting rods 31 and threadedly sleeve it on the bottom of the screw 1. When a rotational force is applied to the nut 2 to cause it to rise, the annular plate 32 can be driven to rise simultaneously, and the pressing ball 33 rises in the groove, forcing the side wall of the groove to turn outwards and bend, so that when the nut 2 stops rotating, the reverse movement channel of the nut 2 can be blocked by the side wall of the groove.

[0035] The diameter of the pressing ball 33 can be determined according to requirements. Specifically, when the groove is set as a cylindrical structure, the diameter of the pressing ball 33 is larger than the inner diameter of the groove. When the groove is set as a frustum structure 12, the diameter of its bottom is larger than that of its top, and at the same time, the diameter of the pressing ball 33 is larger than or equal to the diameter of the bottom of the groove. In any case, during the rising process of the pressing ball 33, the side wall of the groove will turn outwards and bend.

[0036] To facilitate the rising of the pressing ball 33, the width of the slit 11 is larger than or equal to the size of the connecting rod 31. In this case, the connecting rod 31 passes through the slit 11 and can drive the pressing ball 33 to rise and fall in the groove.

[0037] Since the distance between the two connecting rods 31 is slightly larger than the diameter of the nut 2, therefore, the nut can be completely inserted between the two connecting rods 31 after the annular plate 32 is sleeved on the screw 1.

[0038] As Figure 5 As shown in the figure, in order to enable the device to adapt to different usage situations, a plurality of washers 4 stacked up and down are further provided between the annular plate 32 and the nut 2. Under the action of the washers 4, the nut 2 can be stably installed below the screw 1, and at the same time, two components can be stably connected. Additionally, the movement of the nut 2 can be restricted by the side wall of the groove.

[0039] As Figure 6As shown in the figure, in order to enhance the anti-loosening ability, concave grooves 41 and convex teeth 42 are respectively provided on the side surfaces of two adjacent washers 4 that are in contact with each other. That is, concave grooves 41 and convex teeth 42 can be respectively provided on the upper and lower side surfaces of the washer 4. The concave grooves 41 and the convex teeth 42 are meshed and connected to increase the resistance to relative rotation of two adjacent washers 4, and at the same time reduce the resistance to relative rotation between it and the ring plate 32 or the nut 2.

[0040] The above is only the preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, various changes and modifications can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A screw fastener for preventing loosening, characterized in that: The invention comprises a screw (1), a nut (2) is threadedly sleeved on the screw (1), a groove is arranged on the bottom surface of the screw (1), a plurality of slits (11) are arranged on the side wall of the groove, and a pressing ball (33) is arranged below the screw (1), and the pressing ball (33) can force the side wall of the groove to bend outward.

2. The anti-loosening screw fastener according to claim 1, characterized in that: Connecting rods (31) are symmetrically fixedly arranged on both sides of the pressing ball (33), and the tops of the two connecting rods (31) are connected with ring plates (32).

3. The anti-loosening screw fastener according to claim 2, characterized in that: The outer diameter of the ring plate (32) is smaller than or equal to the diameter of the nut (2), and the ring plate (32) is arranged above the nut (2).

4. The anti-loosening screw fastener according to claim 3, characterized in that: The distance between the two connecting rods (31) is slightly larger than the diameter of the nut (2), and the connecting rod (31) can be arranged through the gap (11).

5. The anti-loosening screw fastener according to claim 4, characterized in that: The groove is configured as a frustum structure (12), and the height of the groove is equal to the height of the gap (11); the diameter of the pressing ball (33) is greater than or equal to the inner diameter of the bottom of the groove.

6. The anti-loosening screw fastener according to claim 3, characterized in that: A plurality of washers (4) stacked up and down are also provided between the ring plate (32) and the nut (2); the mutually contacting sides of two adjacent washers (4) are respectively provided with a recessed groove (41) and a convex tooth (42); the recessed groove (41) and the convex tooth (42) are meshed and connected.

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