Screw with anti-loosening structure

Abstract

The screw comprises a screw rod, a screw head and a fastened object, a first gasket, a second gasket and the fastened object are arranged on the outer side of the screw rod, the fastened object is located between the first gasket and the second gasket, the outer side of the screw rod is connected with a nut assembly, and the nut assembly is connected with the screw head. The nut assembly is located at the bottom of the second gasket, the outer side of the nut assembly is connected with a connecting structure, an auxiliary structure is arranged in the nut assembly, and the screw head is fixed to the top end of a fastened object through a fixing structure arranged on the outer side. According to the screw with the anti-loosening structure, the screw head and a fastened object are conveniently fixed through the fixing structure, so that the screw is prevented from loosening, the firmness of the nut and the screw rod is improved through the nut structure, the nut is prevented from loosening, the connecting firmness of the concave nut and the convex nut is improved through the connecting structure, and the anti-loosening structure is arranged through the auxiliary structure. Friction force of connection between the nut and the screw is improved, and therefore the nut is further prevented from loosening.

Description

Technical Field

[0001] The present invention relates to the technical field of screws, and specifically to a screw provided with an anti-loosening structure. Background Technique

[0002] A screw is a common fastener widely used in fields such as machinery, electrical appliances, and construction for connecting two objects or fixing the position of an object. Its basic structure includes a head, a threaded part, and a rod part, and it realizes the fastening function through cooperation with a nut or a threaded hole by means of threads. The working principle of the screw is based on the helix angle and friction force of the thread. By rotating the screw, the external force is converted into an axial force, thereby tightly fixing the connecting parts.

[0003] Referring to the Chinese patent authorization announcement number CN214146203U, the authorization announcement date is September 7, 2021, which discloses a screw with an anti-loosening structure, including a screw cap. A plum blossom hole is opened on the upper outer surface of the screw cap, friction lines are opened on the outer surface around the screw cap, a retaining piece is fixedly connected to the lower outer surface of the screw cap, and a screw column is fixedly connected to the lower outer surface of the retaining piece. The screw with an anti-loosening structure of the present invention, this screw with an anti-loosening structure prevents the screw from loosening through the provided screw column. When people use this screw with an anti-loosening structure, first place the bottom of the screw column into the screw hole to be nailed. The friction lines on the screw cap increase the friction force, which is convenient for workers to screw in. The provided retaining piece reduces the buffering force. When the screw is screwed to the bottom, the long strip gear is tightly connected to the upper end of the screw hole, and the long strip gear increases the friction force, further effectively preventing the screw from loosening, bringing a better application prospect.

[0004] Among them, the following technical problems exist in the above-mentioned prior art: In the existing screw with an anti-loosening structure, the inner nail in it punches open the outer cone and presses the outer cone outward to prevent the screw from loosening. After long-term use, the inner nail inside it is prone to loosen, so that the anti-loosening effect needs to be improved; Therefore, we propose a screw provided with an anti-loosening structure to facilitate solving the problems raised above. Summary of the Invention

[0005] The purpose of the present invention is to provide a screw provided with an anti-loosening structure to solve the problem that in the existing screw with an anti-loosening structure, the inner nail punches open the outer cone and presses the outer cone outward to prevent the screw from loosening, and the inner nail inside it is prone to loosen after long-term use, so that the anti-loosening effect needs to be improved as mentioned in the above background technique.

[0006] To achieve the above object, the present invention provides the following technical solution: A screw with an anti-loosening structure, including a screw rod, a screw head, and a fastened object. A first washer, a second washer, and the fastened object are arranged on the outer side of the screw rod. The fastened object is located between the first washer and the second washer. A nut assembly is connected to the outer side of the screw rod. The nut assembly is located at the bottom of the second washer. A connection structure is connected to the outer side of the nut assembly. An auxiliary structure is arranged inside the nut assembly. The top end of the screw rod is fixedly connected to a screw head. The screw head is fixed to the top end of the fastened object through a fixing structure arranged on the outer side;

[0007] The auxiliary structure includes a threaded hole and a long screw. The long screw is threadedly connected in the threaded hole, and the tail end of the long screw abuts against the screw thread inside the screw rod.

[0008] Preferably, the fixing structure includes a fixing ring, a screw, and a fixing washer. The fixing ring is fixedly connected to the top end of the upper fastened object through the screw. The fixing washer is fixedly installed at the bottom of the screw head.

[0009] Preferably, the fixing ring is fixedly connected to the outer side of the screw head.

[0010] Preferably, the nut assembly includes a concave nut and a convex nut. The concave nut is snap-fitted to the top end of the convex nut.

[0011] Preferably, both the concave nut and the convex nut are threadedly connected to the outer side of the screw rod.

[0012] Preferably, the connection structure includes a first connection ring, a second connection ring, and a bolt. The first connection ring and the second connection ring are respectively fixedly connected to the outer sides of the concave nut and the convex nut. The first connection ring and the second connection ring are fixed using the bolt.

[0013] Preferably, threaded holes are provided in the walls of both the concave nut and the convex nut.

[0014] Compared with the prior art, the beneficial effects of the present invention are: For the screw with an anti-loosening structure, through the fixing structure, it is convenient to fix the screw head to the fastened object, thereby preventing the screw from loosening. Through the nut structure, the firmness between the nut and the screw rod is improved, thereby preventing the nut from loosening. Through the connection structure, the connection firmness between the concave nut and the convex nut is improved. Through the auxiliary structure, the friction between the nut and the screw rod is increased, thereby further preventing the nut from loosening.

[0015] 1. A fixing structure is provided. A fixing ring is fixedly connected to the outer side of the screw head. Multiple screw holes are provided at the top end of the fastened object. The fixing ring is fixedly connected to the top end of the fastened object through multiple screws, thereby fixing the screw head and preventing the screw from loosening;

[0016] Furthermore, the bottom of the fixing washer is provided with uneven textures, which contact the top of the fastened object above, thereby increasing the friction force, thereby further improving the anti-loosening performance;

[0017] 2. A nut structure is provided, which is composed of a concave nut and a convex nut. The bottom of the concave nut and the top of the convex nut are snap-connected, and the thread gap is eliminated through the wedge principle. Even in a vibration or impact environment, the nut and the bolt can be kept tightly combined, thereby preventing the two nuts from loosening;

[0018] 3. A connecting structure is provided, and the first connecting ring and the second connecting ring are fixedly connected by multiple bolts. The first connecting ring and the second connecting ring are respectively fixedly connected to the outside of the concave nut and the convex nut, so that the connection between the two nuts is tighter and loosening between the two nuts can be avoided after long-term use.

[0019] 4. An auxiliary structure is provided, and a long screw is screwed into the threaded hole so that the tail end of the long screw abuts against the thread of the screw rod, further increasing the contact area between the nut and the screw rod, thereby further improving the anti-loosening performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of a first connection structure between a screw rod and a fastened object of the present invention;

[0021] Figure 2 It is a schematic diagram of a second connection structure between a screw rod and a fastened object of the present invention;

[0022] Figure 3 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 4 It is a schematic diagram of the cutaway structure of the present invention;

[0024] Figure 5 For the present invention Figure 4 A schematic diagram of the enlarged structure at A in the middle;

[0025] Figure 6 It is a schematic diagram of the screw head structure of the present invention;

[0026] Figure 7 This is a schematic diagram of the connection structure of the screw rod and the long screw of the present invention;

[0027] Figure 8 It is a schematic diagram of the structure of the nut assembly of the present invention.

[0028] In the figure: 1, screw rod; 2, screw head; 3, fixing structure; 301, fixing ring; 302, screw; 303, fixing washer; 4, nut assembly; 401, concave nut; 402, convex nut; 5, connecting structure; 501, first connecting ring; 502, second connecting ring; 503, bolt; 6, auxiliary structure; 601, threaded hole; 602, long screw; 7, first washer; 8, second washer; 9, object to be fastened. Specific implementation mode

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0030] Please refer to Figures 1 - 8 , the present invention provides the following technical solutions:

[0031] Embodiment 1: A screw provided with an anti-loosening structure, including a screw rod 1, a screw head 2 and an object to be fastened 9. A first washer 7, a second washer 8 and an object to be fastened 9 are arranged on the outer side of the screw rod 1. The object to be fastened 9 is located between the first washer 7 and the second washer 8. A nut assembly 4 is connected to the outer side of the screw rod 1. The nut assembly 4 is located at the bottom of the second washer 8. A connecting structure 5 is connected to the outer side of the nut assembly 4. An auxiliary structure 6 is arranged inside the nut assembly 4. The top end of the screw rod 1 is fixedly connected with a screw head 2. The screw head 2 is fixedly connected to the top end of the object to be fastened 9 through a fixing structure 3 arranged on the outer side;

[0032] As Figure 1 , Figure 3 , Figure 4 , Figure 6 shown, the fixing structure 3 includes a fixing ring 301, a screw 302 and a fixing washer 303. The object to be fastened 9 includes two objects up and down. A connecting hole is opened at the top end of the upper object to be fastened 9. The first washer 7 is placed above the connecting hole of the screw. Hold the screw head 2 and insert the screw rod 1 from the upper object to be fastened 9 into the lower object to be fastened 9, so that the fixing ring 301 is located at the top end of the upper object to be fastened 9. A plurality of small screw holes are opened outside the connecting hole opened at the top end of the object to be fastened 9. Align the position of the screw hole in the fixing ring 301 with the small screw holes opened at the top end of the upper object to be fastened 9. Use the screw 302 to screw into the upper object to be fastened 9 from the screw hole of the fixing ring 301, so as to fix the fixing ring 301. The fixing ring 301 is fixedly connected to the outer side of the screw head 2, so that the screw head 2 is fixedly installed at the top end of the upper object to be fastened 9, preventing the screw head 2 from shaking, thus achieving the anti-loosening effect;

[0033] The fixed washer 303 is fixedly installed at the bottom of the screw head 2. The surfaces of the fixed washer 303 and the first washer 7 are relatively rough, with uneven patterns. The fixed washer 303 increases the friction between the screw head 2 and the first washer 7, and the first washer 7 increases the friction between the screw head 2 and the top of the fastened object 9, thereby preventing loosening. At the same time, the first washer 7 is sleeved outside the screw rod 1. By unscrewing the screw 302 and removing the screw rod 1, the first washer 7 can be disassembled and replaced;

[0034] As Figures 1 - 5 and Figure 8 shown, the nut assembly 4 includes a concave nut 401 and a convex nut 402. First, pass the second washer 8 through the screw rod 1, and then screw the concave nut 401 and the convex nut 402 into the bottom of the screw rod 1 in sequence. The top of the convex nut 402 is snap-connected to the bottom of the concave nut 401. The concave nut 401 gives a force to the convex nut 402 in the direction of the screw rod 1, and the convex nut 402 gives a force to the concave nut 401 away from the screw rod 1, further tightening the concave nut 401 and the convex nut 402. Through the wedge principle, the thread clearance is eliminated and the thread clearance is reduced, so that it can maintain its tight connection with the screw rod 1 even in a vibrating or impact environment;

[0035] The surface of the second washer 8 is relatively rough, with uneven patterns. It is arranged between the fastened object 9 below and the convex nut 402. The second washer 8 increases the friction between the bottom of the fastened object 9 below and the top of the convex nut 402, thereby preventing the convex nut 402 from rotating and loosening. And it is sleeved outside the screw rod 1. By unscrewing the concave nut 401 and the convex nut 402, it can be disassembled and replaced;

[0036] As Figures 2 - 4 and Figure 8 shown, the connection structure 5 includes a first connection ring 501, a second connection ring 502 and a bolt 503. The first connection ring 501 and the second connection ring 502 are respectively fixedly connected to the outside of the concave nut 401 and the convex nut 402. A plurality of screw holes are provided in the first connection ring 501 and the second connection ring 502. After screwing on the concave nut 401 and the convex nut 402, the aligned screw holes are fixed with bolts 503 to improve the connection tightness of the concave nut 401 and the convex nut 402, and avoid the loosening and separation of the concave nut 401 and the convex nut 402 after long-term use, weakening the anti-loosening effect of the wedge principle;

[0037] As Figures 2 - 5 and Figure 7As shown, the auxiliary structure 6 includes a threaded hole 601 and a long screw 602. Two threaded holes 601 are provided in the walls of the concave nut 401 and the convex nut 402. The long screw 602 is screwed into the threaded hole 601, and its tail is made to abut against the thread of the screw rod 1, increasing the contact area between the concave nut 401 and the convex nut 402 and the screw rod 1, thereby increasing the frictional force between the concave nut 401 and the convex nut 402 and the screw rod 1 and further preventing the concave nut 401 and the convex nut 402 from rotating and loosening;

[0038] The material of the screw provided with the anti-loosening structure is generally selected according to the application scenario. Carbon steel screws can be used in industry, stainless steel screws can be used in corrosion-resistant environments, and alloy steel and special quality steel can be used in occasions with high strength and high hardness requirements. Different materials are combined with the above-mentioned anti-loosening structure to further improve the use effect of the screw;

[0039] When disassembling the screw, first screw out the long screw 602 so that the tail of the long screw 602 leaves the thread of the screw rod 1. Then disassemble the bolt 503 in the first connecting ring 501 and the second connecting ring 502, screw out the convex nut 402 and the concave nut 401 in sequence, remove the second washer 8, then screw out the screw 302 in the fixing ring 301 and the object to be fastened 9, and then the screw rod 1 can be taken out.

[0040] The above completes a series of operations on the screw provided with the anti-loosening structure. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0041] The standard parts used in the present invention can all be purchased from the market. The special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The machines, parts, and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be elaborated here.

[0042] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, 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 with an anti-loosening structure, comprising a screw rod (1), a screw head (2) and a fastened object (9), characterized in that: The outer side of the screw rod (1) is provided with a first washer (7), a second washer (8) and a fastened object (9), the fastened object (9) is located between the first washer (7) and the second washer (8), the outer side of the screw rod (1) is connected with a nut assembly (4), the nut assembly (4) is located at the bottom of the second washer (8), the outer side of the nut assembly (4) is connected with a connecting structure (5), the inside of the nut assembly (4) is provided with an auxiliary structure (6), the top end of the screw rod (1) is fixedly connected with a screw head (2), the screw head (2) is fixed to the top end of the fastened object (9) through a fixing structure (3) arranged on the outer side; The auxiliary structure (6) comprises a threaded hole (601) and a long screw (602), the threaded hole (601) is internally threaded and connected to the threaded hole (601), and the tail end of the long screw (602) is against the thread of the screw rod (1).

2. The screw with an anti-loosening structure according to claim 1, characterized in that: The fixing structure (3) comprises a fixing ring (301), a screw (302) and a fixing washer (303); the fixing ring (301) is fixedly connected to the top of the upper fastened object (9) via the screw (302); and the fixing washer (303) is fixedly installed at the bottom of the screw head (2).

3. The screw with an anti-loosening structure according to claim 2, characterized in that: The fixing ring (301) is fixedly connected to the outside of the screw head (2).

4. The screw with an anti-loosening structure according to claim 1, characterized in that: The nut assembly (4) comprises a female nut (401) and a male nut (402), wherein the female nut (401) is snap-connected to the top end of the male nut (402).

5. The screw with an anti-loosening structure according to claim 4, characterized in that: The female nut (401) and the male nut (402) are both threadedly connected to the outside of the screw rod (1).

6. The screw with an anti-loosening structure according to claim 1, characterized in that: The connection structure (5) comprises a first connection ring (501), a second connection ring (502) and a bolt (503); the first connection ring (501) and the second connection ring (502) are respectively fixedly connected to the outside of the female nut (401) and the male nut (402); the first connection ring (501) and the second connection ring (502) are fixed using the bolt (503).

7. The screw with an anti-loosening structure according to claim 4, characterized in that: The walls of the female nut (401) and the male nut (402) are both provided with threaded holes (601).

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