Bridge convenient installation anti-theft fastening device

Abstract

The utility model relates to an anti-theft fastening device for convenient installation of a bridge. The anti-theft fastening device is suitable for solving the problems that operation is inconvenient and a fastener is easy to lose in the process of installing the fastener on an outdoor bridge. The device mainly comprises a screw rod, a hexagon bolt head, a through hole, a core column, a pin shaft, a connecting rod, a hexagon bolt wrench and the like. One end of the screw rod is fixedly connected with the hexagon bolt head and is provided with an external thread and a cavity; the through hole is formed in the side wall of the cavity along the radial direction of the screw; the core column is arranged in the hexagon bolt head groove, and one end of the core column extends into the screw cavity; and the pin shaft is connected with the core column through a spring, is correspondingly arranged in the through hole and can penetrate through the through hole to realize locking. The device has an anti-theft function, the safety performance of a bridge system is improved, and the device is convenient to install.

Description

Technical Field

[0001] This application relates to the field of fasteners, and specifically to a convenient installation and anti-theft fastening device for bridge frames. Background Art

[0002] During the installation of fasteners for outdoor bridge frames, the traditional method usually uses a combination of nuts and bolts for fixation. However, this traditional method has certain deficiencies. For example, the operation is not convenient enough during the installation process, and the fasteners are easily lost, resulting in low installation efficiency and increased maintenance costs. In addition, during the installation of bridge frames, especially in narrow spaces such as corners or internal corners, the traditional installation method usually requires the use of a wrench for fastening. However, due to space limitations, ordinary wrenches are often difficult to access, leading to low installation efficiency and causing fatigue to installers. Moreover, bridge frames are mainly used for outdoor installation and are exposed to the external environment for a long time, and the anti-theft problem has become a technical problem that needs to be solved urgently. Summary of the Utility Model

[0003] The purpose of this application is to provide a convenient installation and anti-theft fastening device for bridge frames to solve the problems of inconvenient installation and easy loss of fasteners when installing fasteners for outdoor bridge frames. To achieve the above purpose, this application provides the following technical solutions: A convenient installation and anti-theft fastening device for bridge frames, including:

[0004] A screw rod, one end of the screw rod is fixedly connected to a hexagonal bolt head, the screw rod is provided with an external thread and has a cavity inside;

[0005] A through hole, the through hole is arranged on the side wall of the cavity along the radial direction of the screw rod;

[0006] A groove, the groove is arranged on the hexagonal bolt head;

[0007] A core column, the core column is arranged in the groove and one end extends into the cavity;

[0008] A pin shaft, the pin shaft is arranged on the core column, connected to the core column through a spring, and the pin shaft is arranged corresponding to the through hole, and the pin shaft can pass through the through hole;

[0009] A connecting rod, one end of the connecting rod is connected to the core column, and the other end is connected to a hexagonal bolt wrench. The hexagonal bolt wrench has an internal hexagonal notch, and the hexagonal bolt wrench is adapted to the hexagonal bolt head.

[0010] Preferably, this technical solution further includes an inclined surface, and the inclined surface is arranged at one end where the connecting rod is connected to the core column.

[0011] Preferably, the connecting rod is threadedly connected to the hexagonal bolt wrench.

[0012] Preferably, the technical solution further includes a limiting groove disposed in the cavity, and the pin shaft abuts against the limiting groove and slides along the limiting groove.

[0013] Preferably, the pin shafts are symmetrically arranged circumferentially along the axis of the screw rod on the core column; the through holes, the limiting grooves and the pin shafts are arranged in one-to-one correspondence.

[0014] Preferably, the technical solution further includes a gasket disposed at the connection between the hexagonal bolt head and the screw rod.

[0015] Preferably, the technical solution further includes an anti-slip protrusion disposed on the gasket.

[0016] Preferably, the technical solution further includes a nut which is in the shape of a hexagonal flange.

[0017] Preferably, the end of the pin shaft has a pointed head.

[0018] Compared with the prior art, the beneficial effects of the present application are as follows:

[0019] One end of the screw rod of the present utility model is fixedly connected to a hexagonal bolt head. The screw rod is provided with an external thread and has a cavity inside. The through hole is arranged radially along the screw rod on the side wall of the cavity. There are a core column and a pin shaft. The core column is arranged in the groove of the hexagonal bolt head and one end extends into the cavity of the screw rod. The pin shaft is connected to the core column through a spring and is correspondingly arranged in the through hole. The pin shaft can pass through the through hole. This design enables the pin shaft to be locked in the through hole after the device is tightened, effectively preventing the loosening and theft of the bolt and improving the safety performance of the bridge system. The present utility model provides a connecting rod and a hexagonal bolt wrench. One end of the connecting rod is connected to the core column and the other end is connected to the hexagonal bolt wrench. The hexagonal bolt wrench has an internal hexagonal notch which is adapted to the hexagonal bolt head. Such a setting is beneficial to improving the installation convenience of the device and greatly reducing the installation difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a front view of a bridge convenient installation and anti-theft fastening device proposed by an embodiment of the present application;

[0021] Figure 2 is Figure 1 the sectional view taken along line A-A in

[0022] Figure 3 is a top view of a bridge convenient installation and anti-theft fastening device proposed by an embodiment of the present application;

[0023] Figure 4 is Figure 3 the sectional view taken along line B-B in

[0024] Figure 5 A three-dimensional schematic diagram of a convenient anti-theft fastening device for bridge installation proposed in an embodiment of the present application;

[0025] In the figure: 1. screw; 2. hexagonal bolt head; 3. cavity; 4. through hole; 5. groove; 6. core column; 7. pin shaft; 8. connecting rod; 9. hexagonal bolt wrench; 10. inclined surface; 11. limit groove; 12. gasket; 13. anti-slip protrusion; 14. nut; 15. spring. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] It should be noted that, in the description of the present application, the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0028] Furthermore, it should be understood that for the sake of ease of description, the sizes of the various components shown in the drawings are not drawn according to actual proportions. For example, the thickness or width of certain layers may be exaggerated relative to other layers.

[0029] It should be noted that like reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined or described in one drawing, it will not require further detailed discussion and description in the description of the subsequent drawings.

[0030] In order to fully understand this technical solution, we first need to understand the specific scenarios in which this technical solution is used. The bridge frame convenient installation anti-theft fastening device is used in bridge frame installation, especially when it is used in narrow spaces such as corners or inner corners, where ordinary wrenches cannot be used. Using the built-in portable wrench will greatly improve the installation efficiency. In addition, bridge frames are generally used for outdoor installation, and anti-theft becomes a technical problem that needs to be solved urgently.

[0031] In order to solve the technical problems in the background technology, such as Figures 1-3 As shown, the present application provides a technical solution: a convenient anti-theft fastening device for bridge frame installation, which has the following characteristics:

[0032] The screw 1 is made of stainless steel. One end is fixedly connected to the hexagonal bolt head 2. The surface of the screw 1 is provided with external threads and has a cavity 3 inside. The through hole 4 is arranged on the side wall of the cavity 3 along the radial direction of the screw 1 to facilitate the pin shaft 7 to pass through. The groove 5 is arranged at the end of the hexagonal bolt head 2. The groove 5 is a concave circular cylinder and is provided with a core column 6 inside. The core column 6 is coaxially arranged with the screw 1. The core column 6 is made of metal, is arranged in the groove 5, one end slightly protrudes from the surface of the groove 5, and the other end extends deep into the cavity 3. The pin shaft 7 is made of metal, is arranged on the core column 6, the pin shaft 7 is arranged along the radial direction of the core column 6, and the pin shaft 7 is connected to the core column 6 through a spring (15). The pin shaft 7 is correspondingly arranged with the through hole 4. The initial position of the pin shaft 7 is to abut against the inner wall of the cavity 3 of the screw 1. When the core column 6 is stressed and moves axially, the pin shaft 7 moves to the position of the through hole 4. Under the action of the spring 15, the pin shaft 7 can pass through the through hole 4 and protrude out of the outer surface of the screw 1. The connecting rod 8 is made of metal. One end is connected to the core column 6 and the other end is connected to the hexagonal bolt wrench 9. The end of the connecting rod 8 connected to the core column 6 can be welded or integrally formed. When the connecting rod 8 needs to be removed, the connection between the connecting rod 8 and the core column 6 can be broken by rotating the hexagonal bolt wrench 9. The hexagonal bolt wrench 9 has an internal hexagonal notch and is adapted to the hexagonal bolt head 2.

[0033] When in use, when the contact surface between the bridge and the wooden structure or the wall needs to be fastened, the screw 1 is passed through the installation hole of the bridge, and the hexagonal bolt wrench 9 is gently rotated to make part of the screw 1 turn into the thread of the installation hole. When further fastening is needed, the hexagonal bolt wrench 9 is used to break the connection between the connecting rod 8 and the core column 6 by rotating it forcefully. The hexagonal bolt wrench 9 is sleeved on the hexagonal bolt head 2; the connecting rod 8 is rotated to drive the hexagonal bolt wrench 9 to drive the hexagonal bolt head 2 to rotate, so that the screw 1 completely enters the installation hole and the hexagonal bolt head 2 fits against the installation surface of the bridge. The connecting rod 8 is inserted into the groove 5 to abut against the core column 6. An external force is used to strike the hexagonal bolt wrench 9, so that the core column 6 is disengaged from the groove 5, the core column 6 moves axially, and further makes the pin shaft 7 abut against the position of the through hole 4. Under the action of the spring 15, the pin shaft 7 protrudes out of the through hole 4 and is clamped on the inner wall of the installation hole, realizing the locking of the fastening device and preventing the screw 1 from being disassembled, thus realizing the anti-theft function.

[0034] It should be noted that the inclined plane 10 is located at one end of the connecting rod 8 and is tightly connected to the core column 6. The design of the inclined plane 10 helps to reduce the contact area, thereby reducing the connection stability and is beneficial to easily breaking the connection when the hexagonal bolt wrench 9 needs to be used.

[0035] Furthermore, the connecting rod 8 is made of a high-strength metal material and has high torsional resistance. One end of the connecting rod 8 is provided with external threads, and the external threads cooperate with the threaded hole on one side of the hexagonal bolt wrench 9 to realize threaded connection. The threaded movable connection method here is convenient for disassembly.

[0036] It should be noted that the limiting groove 11 is in a strip shape, and the width of the limiting groove 11 is slightly larger than the diameter of the pin shaft 7 to ensure that the pin shaft 7 can slide freely in the groove; the cross-section of the limiting groove 11 can be arc-shaped or U-shaped. When the pin shaft 7 abuts against the limiting groove 11, the pin shaft 7 can slide smoothly along the limiting groove 11. This process not only reduces the friction between the pin shaft 7 and the limiting groove 11, reduces wear, but also improves the sliding efficiency and stability of the pin shaft 7.

[0037] Furthermore, the axis of the screw 1 coincides with the axis of the core column 6, and the pin shafts 7 are symmetrically arranged circumferentially along the axis of the screw 1 on the core column 6. The through hole 4 is provided on the side wall of the screw 1, and the axis of the through hole 4 is perpendicular to the axis of the screw 1. A plurality of limiting grooves 11 are provided on the side wall of the cavity 3, the axis of the limiting groove 11 is parallel to the axis of the screw 1, and the position of the limiting groove 11 corresponds to that of the pin shaft 7. Specifically, the pin shaft 7 slides along the limiting groove 11. When sliding to a certain position, the pin shaft 7 can extend out of the through hole 4 along the limiting groove 11 to abut against the mounting hole for limiting and anti-theft. At this time, even if the screw 1 is subjected to an external force, it cannot rotate, achieving the purpose of anti-theft. In order to improve the stability and gripping force of the anti-theft screw structure, a plurality of pin shafts 7 are provided on the core column 6 in this embodiment. In this way, when the pin shafts 7 extend out of the through hole 4 along the limiting grooves 11, the plurality of pin shafts 7 act on the screw 1 together, making it more stable and having a stronger gripping force.

[0038] It should be pointed out that the gasket 12 is arranged at the connection between the hexagonal bolt head 2 and the screw 1. The gasket 12 is integrally formed with the hexagonal bolt head 2, its outer diameter is larger than the outer diameter of the hexagonal bolt head 2, and its inner diameter matches the diameter of the screw 1. During the tightening process, the gasket 12 can play a role in buffering and shock absorption, protecting the connection between the hexagonal bolt head 2 and the screw 1 from damage, and at the same time increasing the contact area between the hexagonal bolt head 2 and the mounting surface.

[0039] It should be noted that as shown in the figure, the anti-slip protrusions 13 are evenly arranged on the upper surface of the gasket 12. The shape of each anti-slip protrusion 13 is similar to a triangle and is evenly arranged annularly along the gasket 12. Due to the existence of the anti-slip protrusions 13, a stable frictional force is formed between the gasket 12 and the plane, effectively preventing sliding.

[0040] It should be noted that the nut 14 is a hexagonal flange-shaped nut 14, which has the following characteristics: the hexagonal shape is convenient for using tools such as wrenches to rotate, facilitating installation and disassembly. The flange part can increase the contact area between the nut 14 and the connecting piece, reduce the pressure, and reduce the damage to the connecting piece.

[0041] It should be noted that the pin shaft 7 is generally cylindrical, and one end thereof has a pointed structure. The material of the pin shaft 7 is preferably stainless steel or aluminum alloy, which has good wear resistance and corrosion resistance. In terms of the specific structure, the pointed end of the pin shaft 7 is designed in a tip shape, and the diameter of its tip is smaller than the diameter of the main body of the pin shaft 7, which is convenient for inserting into the inner wall of the mounting hole. The length of the pointed part is about 1 / 4 to 1 / 3 of the diameter of the pin shaft 7, so that the pin shaft 7 can quickly increase the grasping force when inserted into the mounting hole.

[0042] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present application. The scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A convenient installation and anti-theft fastening device for a bridge frame, characterized in that, Comprising: A screw rod (1), one end of the screw rod (1) is fixedly connected to a hexagonal bolt head (2), the screw rod (1) is provided with an external thread and has a cavity (3) inside; A through hole (4), the through hole (4) is arranged in the side wall of the cavity (3) along the radial direction of the screw rod (1); A groove (5), the groove (5) is arranged on the hexagonal bolt head (2); A core column (6), the core column (6) is arranged in the groove (5) and one end extends into the cavity (3); A pin shaft (7), the pin shaft (7) is arranged on the core column (6), connected to the core column (6) through a spring (15), and the pin shaft (7) is arranged corresponding to the through hole (4), and the pin shaft (7) can pass through the through hole (4); A connecting rod (8), one end of the connecting rod (8) is connected to the core column (6), and the other end is connected to a hexagonal bolt wrench (9), the hexagonal bolt wrench (9) has an internal hexagonal notch, and the hexagonal bolt wrench (9) is adapted to the hexagonal bolt head (2).

2. The convenient installation and anti-theft fastening device for bridge frames according to claim 1, wherein, Further comprising an inclined surface (10), the inclined surface (10) is arranged at one end where the connecting rod (8) is connected to the core column (6).

3. The bridge convenient installation anti-theft fastening device according to claim 1, characterized in that, The connecting rod (8) is threadedly connected to the hexagonal bolt wrench (9).

4. The bridge convenient installation anti-theft fastening device according to claim 1, characterized in that, Further comprising a limiting groove (11), the limiting groove (11) is arranged in the cavity (3), and the pin shaft (7) abuts against the limiting groove (11) and slides along the limiting groove (11).

5. The bridge convenient installation anti-theft fastening device according to claim 4, characterized in that, The pin shaft (7) is circumferentially symmetrically arranged on the core column (6) along the axis of the screw rod (1); the through hole (4), the limiting groove (11) and the pin shaft (7) are arranged in one-to-one correspondence.

6. The convenient installation and anti-theft fastening device for bridge trusses according to claim 1, characterized in that, Further comprising a gasket (12), the gasket (12) is arranged at the connection between the hexagonal bolt head (2) and the screw rod (1).

7. The bridge convenient installation anti-theft fastening device according to claim 6, characterized in that, Further comprising anti-slip protrusions (13), the anti-slip protrusions (13) are arranged on the gasket (12).

8. The bridge convenient installation anti-theft fastening device according to any one of claims 1-7, characterized in that, Further comprising a nut (14), the nut (14) is in the shape of a hexagonal flange.

9. The bridge convenient installation anti-theft fastening device according to claim 8, characterized in that, The end of the pin shaft (7) has a pointed head.

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