Segmented thread stop screw for bridge

Abstract

The utility model relates to the technical field of screw devices, and provides a segmented thread anti-loose screw for a bridge, which comprises a screw rod body, a first thread groove is arranged on the outer surface of the screw rod body, a first matching nut and a second matching nut are screwed into the screw rod body, and an anti-loose groove exerts pressure on the surface of an anti-loose convex plate in the rotating process. A plurality of reserved grooves are formed in the surface of an anti-loosening protruding plate, the anti-loosening protruding plate deforms towards the center of the screw rod body under pressure, the connection tightness of the first matching nut and the anti-loosening protruding plate on the surface of the screw rod body is improved, the anti-loosening effect is achieved, a sealing gasket is matched with a plurality of second anti-skid protruding blocks, the connection sealing performance and friction force with the outside are improved, loosening is avoided, and the service life of the screw is prolonged. The first thread groove, the second thread groove and the third thread groove are formed in the surface of the screw rod body, so that connecting pieces are meshed tightly, the screw rod body is prevented from loosening, meanwhile, excessive concentration of surface stress of the second matching nut is avoided, the vibration resistance of the screw rod body is improved, and the screw rod body is prevented from being gradually loosened due to vibration.

Description

TECHNICAL FIELD

[0001] The utility model relates to screw device technical field especially relates to a segmented thread anti-loose screw for bridge. BACKGROUND

[0002] The screw for bridge is a high-strength, corrosion-resistant fastener specially used in bridge structure, which is used to connect components such as steel beam, bridge deck, guardrail, etc., to ensure the stability and safety of the bridge.

[0003] In the prior art, the screw for bridge lacks an anti-loose structure. Under the continuous action of dynamic loads such as vehicle vibration and wind load, the pre-tightening force will gradually be weakened, and the connected components may be displaced or even detached, which will cause serious stress concentration and fatigue cracks, greatly accelerating the failure process of the structure. Frequent maintenance and tightening not only increase the cost, but also damage the threads in repeated operations, further affecting the reliability of the connection. If the screw strength is insufficient, whether it is static load or dynamic load, plastic deformation or fracture of the screw may occur at critical positions such as the main beam joint or anchorage point, which may cause local collapse and cause devastating damage to the overall structure of the bridge. Screws with insufficient torsional resistance are prone to breakage during installation or use, which not only affects the construction progress, but also may cause safety accidents due to screw breakage during later use, posing a great threat to the service life of the bridge and public safety. SUMMARY

[0004] The utility model aims at providing a segmented thread anti-loose screw for bridge. The utility model designs a structure that prevents the screw for bridge from loosening. When facing dynamic loads such as vehicle vibration and wind load, the pre-tightening force can be effectively maintained to ensure stable connection and prevent displacement and detachment of components, thereby reducing stress concentration and fatigue crack generation, significantly delaying the structure failure process, and reducing the frequency of maintenance and tightening, which not only reduces the cost, but also avoids damage to the threads caused by repeated operations, further improving the reliability of the connection. The utility model designs a structure that improves the strength of the screw for bridge, which can maintain its shape and function whether it is static load or dynamic load, especially at critical positions such as the main beam joint or anchorage point, which can effectively prevent local collapse and ensure the stability of the overall structure of the bridge. The utility model designs a structure that improves the torsional resistance of the screw, which is not prone to breakage during installation and use, which not only helps to improve the construction efficiency, but also ensures the safety of later use, thereby prolonging the service life of the bridge and ensuring public safety.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a segmented thread anti-loose screw for bridge, comprising:

[0006] A screw rod body is provided with a first thread groove on the outer surface, further comprising:

[0007] The fastening plate is fixedly arranged at one end surface of the screw rod body, a first matching nut is movably connected to the outer surface of the screw rod body, an anti-loose convex plate is fixedly arranged on the outer surface of the first matching nut, a plurality of reserved grooves are arranged on the outer surface of the anti-loose convex plate, a second matching nut is movably connected to the outer surface of the screw rod body, an anti-loose groove is arranged on the inner surface of the second matching nut, a screw head end is fixedly arranged on the outer surface of the fastening plate, a second thread groove is arranged on the outer surface of the screw rod body close to the fastening plate, a sealing gasket is fixedly arranged on the outer surface of the fastening plate, the sealing gasket is fixedly connected to the outer surface of the screw rod body, a plurality of second anti-skid convex blocks are fixedly arranged on the outer surface of the sealing gasket, a third thread groove is arranged on the outer surface of the screw rod body, the pitch of the third thread groove is slightly larger than that of the first thread groove and the second thread groove, the pitch of the first thread groove is the same as that of the second thread groove, the first matching nut and the second matching nut are screwed into the surface of the screw rod body and are in contact, the anti-loose convex plate is in contact with the anti-loose groove, the anti-loose groove exerts pressure on the anti-loose convex plate and the surface of the screw rod body during rotation, a plurality of reserved grooves are arranged on the surface of the anti-loose convex plate, the anti-loose convex plate is deformed towards the center of the screw rod body under the pressure of the anti-loose groove, the connection and fastening of the first matching nut and the anti-loose convex plate on the surface of the screw rod body are improved, the anti-loose effect is achieved, the sealing gasket cooperates with the plurality of second anti-skid convex blocks to improve the sealing and friction between the screw rod body and the external structural member, relative rotation and loosening between the screw rod body and the external structural member are avoided, the first thread groove, the second thread groove and the third thread groove arranged on the surface of the screw rod body can make the engagement between the threaded connections more compact, generate resistance to prevent the screw rod body from loosening, and at the same time, the excessive stress concentration on the surface of the second matching nut can be avoided, the anti-vibration performance of the screw rod body is improved, and the screw rod body is gradually loosened due to vibration.

[0008] Preferably, the first thread groove, the second thread groove and the third thread groove are all designed with a thread root round corner, which can reduce the stress concentration on the surface of the screw rod body and improve the fatigue life of the screw rod body.

[0009] Preferably, a screw head part is fixedly arranged on the outer surface of the screw rod body, the screw head part is conical, the screw head part can uniformly transmit load to the internal connection member, and local stress concentration of the screw rod body is avoided to improve the structural strength of the screw rod body.

[0010] Preferably, a plurality of metal ceramic composite shafts are fixedly embedded in the inner surface of the screw rod body, the plurality of metal ceramic composite shafts are uniformly arranged on the inner surface of the screw rod body, and embedding the plurality of metal ceramic composite shafts in the screw rod body can improve the anti-tension and anti-fracture performance of the screw rod body.

[0011] Preferably, the screw rod body inner surface is fixedly embedded with a plurality of metal rubber damping plates, and the plurality of metal rubber damping plates are symmetrically arranged on the screw rod body inner surface.

[0012] Preferably, the screw head end outer surface is fixedly provided with a plurality of reinforcing rib plates, and the plurality of reinforcing rib plates are fixedly connected with the outer surface of the fastening plate.

[0013] Preferably, the screw head end outer surface is fixedly provided with a plurality of first anti-skid bosses, and the plurality of first anti-skid bosses are uniformly arranged on the screw head end outer surface.

[0014] Preferably, the screw head end outer surface is provided with a rotating groove, and the rotating groove is in contact with the external rotating structure to tighten the screw rod body.

[0015] Compared with the prior art, the utility model has the advantages and positive effects that,

[0016] 1. In the utility model, the first matching nut and the second matching nut are screwed into the surface of the screw rod body and are in contact, the anti-loose convex plate is in contact with the anti-loose groove, the anti-loose groove exerts pressure on the anti-loose convex plate and the surface of the screw rod body during rotation, a plurality of reserved grooves are formed in the surface of the anti-loose convex plate, the anti-loose convex plate is deformed towards the center of the screw rod body under the pressure of the anti-loose groove, the connection and fastening of the first matching nut and the anti-loose convex plate on the surface of the screw rod body are improved, the anti-loose effect is achieved, the sealing gasket cooperates with the plurality of second anti-skid bosses to improve the sealing property and friction between the screw rod body and the external structure, relative rotation and loosening between the screw rod body and the external structure are avoided, the first thread groove, the second thread groove and the third thread groove are formed in the surface of the screw rod body, the engagement between the threaded connections is more compact, resistance is generated to prevent the screw rod body from loosening, the stress on the surface of the second matching nut is prevented from being excessively concentrated, the anti-vibration performance of the screw rod body is improved, and the screw rod body is prevented from gradually loosening due to vibration.

[0017] 2. In the utility model, the screw head can uniformly transmit load to the internal connection, local stress concentration of the screw rod body is avoided to improve the structural strength of the screw rod body, the plurality of metal ceramic composite mandrels embedded in the screw rod body can improve the anti-tension and anti-fracture performance of the screw rod body, the plurality of metal rubber damping plates arranged in the screw rod body can improve the anti-torsion performance of the screw rod body, and the plurality of first anti-skid bosses can improve the friction between the screw head end and the external rotating structure. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A three-dimensional structure schematic view of the segmented thread anti-loose screw for bridges is provided.

[0019] Figure 2 The utility model provides a kind of sectional thread lock screw side surface three-dimensional structure schematic view for bridge;

[0020] Figure 3 The utility model provides a kind of sectional thread lock screw side view structure schematic view for bridge;

[0021] Figure 4 The utility model provides a kind of sectional thread lock screw for bridge Figure 1 Amplification three-dimensional structure schematic view in the place of it.

[0022] Legend:

[0023] 1, screw rod body;2, first thread groove;3, fastening plate;4, screw head end;5, second thread groove;6, first matched nut;7, reinforcing rib plate;8, first anti-skid boss;9, rotation groove;10, second matched nut;11, screw head;12, third thread groove;13, lock convex plate;14, reserved groove;15, lock recess;16, sealing gasket;17, second anti-skid boss;18, metal ceramic composite mandrel;19, metal rubber damping plate. Specific embodiments

[0024] In order to more clearly understand the above-mentioned purposes, features and advantages of the utility model, the utility model will be further described below in conjunction with the drawings and examples. It should be noted that the embodiments of the present application and the features in the examples can be combined with each other without conflict.

[0025] In the following description, many specific details are set forth in order to provide a thorough understanding of the present utility model, however, the present utility model can also be implemented in other ways different from those described herein, therefore, the present utility model is not limited to the specific embodiments disclosed in the following specification.

[0026] Example 1, as Figures 1 to 4As shown, the utility model provides a kind of segmented thread lock screw for bridge, including screw rod body 1, first thread groove 2 is set in the outer surface of screw rod body 1, fastening plate 3 is fixedly arranged in the one end surface of screw rod body 1, first mating nut 6 is movably connected with the outer surface of screw rod body 1, anti-loose convex plate 13 is fixedly arranged on the outer surface of first mating nut 6, a plurality of reserved slots 14 are set in the outer surface of anti-loose convex plate 13, second mating nut 10 is movably connected with the outer surface of screw rod body 1, anti-loose groove 15 is set in the inner surface of second mating nut 10, screw head end 4 is fixedly arranged on the outer surface of fastening plate 3, second thread groove 5 is set in the outer surface of one end of fastening plate 3 close to screw rod body 1, sealing pad 16 is fixedly arranged on the outer surface of fastening plate 3, sealing pad 16 is fixedly connected with the outer surface of screw rod body 1, a plurality of second anti-skid convex blocks 17 are fixedly arranged on the outer surface of sealing pad 16, third thread groove 12 is set in the outer surface of screw rod body 1, the pitch of third thread groove 12 is slightly greater than the pitch of first thread groove 2 and second thread groove 5, the pitch of first thread groove 2 and second thread groove 5 is same, first mating nut 6 and second mating nut 10 are screwed into the surface of screw rod body 1 and contact, anti-loose convex plate 13 and anti-loose groove 15 contact, anti-loose groove 15 exerts pressure on the surface of anti-loose convex plate 13 and screw rod body 1 during rotation, a plurality of reserved slots 14 are set in the surface of anti-loose convex plate 13, anti-loose convex plate 13 is deformed towards the center of screw rod body 1 under the pressure of anti-loose groove 15, improve the connection fastening of first mating nut 6 and anti-loose convex plate 13 on the surface of screw rod body 1, reach the effect of anti-loose, sealing pad 16 cooperates with a plurality of second anti-skid convex blocks 17 to improve the sealing and friction force between screw rod body 1 and external structural member, avoid relative rotation and loosening between screw rod body 1 and external structural member, first thread groove 2, second thread groove 5 and third thread groove 12 are set in the surface of screw rod body 1, so that the engagement between threaded connecting pieces is more closely, resistance is generated to prevent screw rod body 1 from loosening, and at the same time, the excessive concentration of surface stress of second mating nut 10 can be avoided, the vibration resistance of screw rod body 1 is improved, and the gradual loosening of screw rod body 1 due to vibration is avoided.

[0027] Further, as shown in the drawings, Figures 1 to 4 The first thread groove 2, the second thread groove 5 and the third thread groove 12 are all designed with thread root fillet, which can reduce the surface stress concentration of the screw rod body 1 and improve the fatigue life of the screw rod body 1.

[0028] Further, as shown in the drawings, Figures 1 to 4 The outer surface of the screw rod body 1 is fixedly provided with a screw head 11, which is conically arranged. The screw head 11 can uniformly transmit load to the internal connecting piece, avoid local stress concentration of the screw rod body 1 to improve the structural strength of the screw rod body 1.

[0029] Further, as shown in the drawings, Figures 1 to 4As shown, the screw rod body 1 inner surface is fixedly embedded with a plurality of metal ceramic composite shafts 18, a plurality of metal ceramic composite shafts 18 are uniformly arranged on the inner surface of the screw rod body 1, and the embedding of a plurality of metal ceramic composite shafts 18 in the screw rod body 1 can improve the tensile fracture resistance of the screw rod body 1.

[0030] Further, as shown in Figures 1 to 4 As shown, the screw rod body 1 inner surface is fixedly embedded with a plurality of metal ceramic composite shafts 18, a plurality of metal ceramic composite shafts 18 are uniformly arranged on the inner surface of the screw rod body 1, and the embedding of a plurality of metal ceramic composite shafts 18 in the screw rod body 1 can improve the tensile fracture resistance of the screw rod body 1.

[0031] Further, as shown in Figures 1 to 4 As shown, the screw rod body 1 inner surface is fixedly embedded with a plurality of metal ceramic composite shafts 18, a plurality of metal ceramic composite shafts 18 are uniformly arranged on the inner surface of the screw rod body 1, and the embedding of a plurality of metal ceramic composite shafts 18 in the screw rod body 1 can improve the tensile fracture resistance of the screw rod body 1.

[0032] Further, as shown in Figures 1 to 4 As shown, the screw rod body 1 inner surface is fixedly embedded with a plurality of metal ceramic composite shafts 18, a plurality of metal ceramic composite shafts 18 are uniformly arranged on the inner surface of the screw rod body 1, and the embedding of a plurality of metal ceramic composite shafts 18 in the screw rod body 1 can improve the tensile fracture resistance of the screw rod body 1.

[0033] Further, as shown in Figures 1 to 4 As shown, the screw rod body 1 inner surface is fixedly embedded with a plurality of metal ceramic composite shafts 18, a plurality of metal ceramic composite shafts 18 are uniformly arranged on the inner surface of the screw rod body 1, and the embedding of a plurality of metal ceramic composite shafts 18 in the screw rod body 1 can improve the tensile fracture resistance of the screw rod body 1.

[0034] Working principle: the first nut 6 and the second nut 10 are screwed into the surface of the screw rod body 1 and contact, the anti-loose convex plate 13 contacts the anti-loose groove 15, the anti-loose groove 15 exerts pressure on the anti-loose convex plate 13 and the surface of the screw rod body 1 during rotation, a plurality of reserved grooves 14 are arranged on the surface of the anti-loose convex plate 13, the anti-loose convex plate 13 deforms towards the center of the screw rod body 1 under the pressure of the anti-loose groove 15, the connection fastening of the first nut 6 and the anti-loose convex plate 13 on the surface of the screw rod body 1 is improved, the anti-loose effect is achieved, the sealing gasket 16 cooperates with the plurality of second anti-slip convex blocks 17 to improve the sealing and friction between the screw rod body 1 and the external structure, the relative rotation and loosening between the screw rod body 1 and the external structure is avoided, the first thread groove 2, the second thread groove 5 and the third thread groove 12 are arranged on the surface of the screw rod body 1, the engagement between the threaded connections is more closely, resistance is generated to prevent the screw rod body 1 from loosening, meanwhile, the surface stress of the second nut 10 is prevented from being excessively concentrated, the anti-vibration performance of the screw rod body 1 is improved, the screw rod body 1 is prevented from gradually loosening due to vibration, the screw head 11 can uniformly transmit load to the internal connection, the local stress concentration of the screw rod body 1 is avoided to improve the structural strength of the screw rod body 1, the plurality of metal ceramic composite shafts 18 embedded in the screw rod body 1 can improve the anti-tension and anti-fracture performance of the screw rod body 1, the plurality of metal rubber damping plates 19 arranged in the screw rod body 1 can improve the anti-torsion performance of the screw rod body 1, the plurality of first anti-slip convex blocks 8 improve the friction between the screw head end 4 and the external rotating structure.

[0035] The above is only a preferred embodiment of the present application, and does not limit the present application in other forms. Any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification made according to the technical essence of the present application to the above embodiments still belongs to the protection scope of the technical scheme of the present application.

Claims

1. A segmented threaded anti-loosening screw for bridges, comprising: A screw shank (1), wherein a first threaded groove (2) is formed on the outer surface of the screw shank (1), characterized in that it further comprises: A fastening plate (3) is fixedly disposed on one end face of the screw rod (1). A first mating nut (6) is movably connected to the outer surface of the screw rod (1). An anti-loosening protrusion (13) is fixedly disposed on the outer surface of the first mating nut (6). Multiple reserved grooves (14) are opened on the outer surface of the anti-loosening protrusion (13). A second mating nut (10) is movably connected to the outer surface of the screw rod (1). An anti-loosening groove (15) is opened on the inner surface of the second mating nut (10). A screw head end (4) is fixedly disposed on the outer surface of the fastening plate (3). The screw rod (1) is close to... The outer surface of one end of the fastening plate (3) is provided with a second threaded groove (5). A sealing gasket (16) is fixedly provided on the outer surface of the fastening plate (3). The sealing gasket (16) is fixedly connected to the outer surface of the screw rod (1). A plurality of second anti-slip protrusions (17) are fixedly provided on the outer surface of the sealing gasket (16). A third threaded groove (12) is provided on the outer surface of the screw rod (1). The pitch of the third threaded groove (12) is slightly larger than that of the first threaded groove (2) and the second threaded groove (5). The pitch of the first threaded groove (2) and the second threaded groove (5) is the same.

2. The segmented threaded anti-loosening screw for bridges according to claim 1, characterized in that: The first thread groove (2), the second thread groove (5) and the third thread groove (12) all adopt a thread root fillet design.

3. A segmented threaded anti-loosening screw for bridges according to claim 1, characterized in that: The screw head (11) is fixedly provided on the outer surface of the screw rod (1), and the screw head (11) is conical.

4. A segmented threaded anti-loosening screw for bridges according to claim 1, characterized in that: Multiple metal-ceramic composite mandrels (18) are fixedly embedded on the inner surface of the screw rod (1), and the multiple metal-ceramic composite mandrels (18) are evenly arranged on the inner surface of the screw rod (1).

5. A segmented threaded anti-loosening screw for bridges according to claim 1, characterized in that: Multiple metal rubber damping plates (19) are fixedly embedded on the inner surface of the screw rod (1), and the multiple metal rubber damping plates (19) are symmetrically arranged on the inner surface of the screw rod (1).

6. A segmented threaded anti-loosening screw for bridges according to claim 1, characterized in that: Multiple reinforcing ribs (7) are fixedly provided on the outer surface of the screw head end (4), and the multiple reinforcing ribs (7) are all fixedly connected to the outer surface of the fastening plate (3).

7. A segmented threaded anti-loosening screw for bridges according to claim 1, characterized in that: A plurality of first anti-slip protrusions (8) are fixedly provided on the outer surface of the screw head end (4), and the plurality of first anti-slip protrusions (8) are evenly provided on the outer surface of the screw head end (4).

8. A segmented threaded anti-loosening screw for bridges according to claim 1, characterized in that: The outer surface of the screw head (4) is provided with a rotating groove (9).

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