Bolt and nut connecting structure capable of stopping looseness

Abstract

The utility model relates to a bolt and nut connecting structure capable of stopping looseness, which comprises a bolt and a hexagon nut, the bolt comprises a screw rod and a bolt head arranged at the other end of the screw rod, and the hexagon nut is used for being in threaded connection with the bolt to fix an object; a rotation stopping hole is formed in the outer surface of the hexagon nut, a rotation stopping groove which extends in the axial direction of the screw and penetrates through the end, away from the bolt head, of the screw is formed in the circumferential face of the screw, and the rotation stopping groove is located at the joint of the two half threaded sections. The rotation stopping sleeve is provided with rotation stopping teeth used for being arranged in the rotation stopping grooves in a penetrating mode and rotation stopping pieces used for being arranged in the rotation stopping holes in a penetrating mode, and the rotation stopping pieces are of a bendable structure. The utility model aims to provide the bolt which can be reliably prevented from loosening and can be in threaded connection with the bolt, and the problem that the existing bolt is easy to loosen is solved.

Description

Technical Field

[0001] The utility model relates to a fastener, in particular to a bolt and nut connection structure capable of preventing loosening. Background Art

[0002] Currently, there is a great demand for the installation of structural parts connection and fastening in the fields of civil engineering and mechanical installation. Common bolt fasteners are generally composed of nuts and screws. During installation, it is necessary to clamp the nut or cap on one side and tighten it with a wrench on the other side. Usually the installer can access both sides of the object to be fastened. For special components, such as closed components, although the performance is good and common, the closed end cannot be operated. Therefore, common structures try to avoid closed components. Even if closed components are used, many structural component connections have to be welded, riveted, or even split components to replace the construction process. During the use of existing threaded and nut connections, the nut is easy to loosen. The existing method to prevent loosening is to set a spring washer and increase the friction between the threads through the elastic force generated by the spring washer. This method has a poor effect in preventing loosening. Utility Model Content

[0003] The utility model aims to provide a bolt which can be threadedly connected to the bolt and can reliably prevent loosening, thereby solving the problem that the existing bolts are easy to loosen.

[0004] The following technical problems are solved by the following technical solutions: A bolt and nut connection structure capable of preventing loosening, comprising a bolt and a hexagonal nut, wherein the bolt comprises a screw and a bolt head arranged at the other end of the screw, the hexagonal nut is used for threaded connection on the bolt to fix an object, and is characterized in that it also comprises a stop sleeve for sleeved on the screw, a stop hole is arranged on the outer surface of the hexagonal nut, a stop groove extending along the axial direction of the screw and penetrating the end of the screw away from the bolt head is arranged on the circumferential surface of the screw, the stop groove is located at the connection of the two half threaded sections, the stop sleeve is provided with a stop tooth for penetrating into the stop groove and a stop plate for penetrating into the stop hole, and the stop plate is a bendable structure. When in use, after the hexagonal nut is locked in place, the stop sleeve is sleeved on the screw with the stop tooth in the only stop groove until it abuts against the hexagonal nut, and then the stop plate is bent and inserted into the stop hole, thereby preventing the hexagonal nut from loosening. It can reliably prevent the nut from loosening.

[0005] Preferably, there are two anti-rotation grooves and two anti-rotation teeth, and the two anti-rotation teeth are used to be inserted into the two anti-rotation grooves in a one-to-one correspondence. The force is uniform when applied.

[0006] Preferably, the two anti-rotation grooves are evenly distributed along the circumference of the screw.

[0007] Preferably, the two surfaces of the hexagonal nut are provided with the anti-rotation holes, and the anti-rotation plates are two, and the two anti-rotation plates are respectively inserted into the two anti-rotation holes, so that the anti-rotation plates can save effort when bending and ensure that the anti-rotation plates have sufficient strength to prevent rotation.

[0008] Preferably, the two anti-rotation plates are evenly distributed along the circumference of the anti-rotation sleeve to bear uniform force.

[0009] Preferably, the anti-rotation holes are provided on the six faces of the hexagonal nut, and all the anti-rotation holes are connected to form an annular groove extending along the circumference of the hexagonal nut, and the anti-rotation plate cooperates with the bottom surface of the anti-rotation hole to achieve anti-rotation.

[0010] Preferably, the end of the screw rod away from the bolt head is provided with a regular hexagonal prism section to facilitate tightening.

[0011] The utility model has the following beneficial effects: it can reliably prevent the nut from loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the first embodiment of the present utility model;

[0013] Figure 2 This is a schematic diagram of the second embodiment of the present utility model.

[0014] In the figure: screw rod 2, bolt head 3, anti-rotation sleeve 18, hexagonal nut 19, anti-rotation hole 20, anti-rotation groove 21, anti-rotation tooth 22, anti-rotation plate 23, bolt 24, annular groove 25, regular hexagonal prism segment 26. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] See also Figure 1, a bolt-nut connection structure capable of preventing loosening, comprising bolts 24, 19 and a stop sleeve 18. The bolt comprises a screw rod 2 and a bolt head 3 arranged at the other end of the screw rod. A stop hole 20 is arranged on the outer surface of the hexagonal nut, specifically: there are six stop holes, and the six stop holes are arranged one by one on the two outer sides of the hexagonal nut. A stop groove 21 extending along the axial direction of the screw rod and penetrating the end of the screw rod away from the bolt head is arranged on the circumferential surface of the screw rod, and the stop groove is located at the connection between the two half-threaded sections. There are two stop grooves, and the two stop grooves are evenly distributed along the circumference of the screw rod. The stop sleeve is provided with a stop tooth 22 for penetrating into the stop groove and a stop plate 23 for penetrating into the stop hole, and the stop plate is a bendable structure. There are two stop teeth, and the two stop teeth are used to be penetrating into the two stop grooves one by one. There are two stop plates. The two stop plates are evenly distributed along the circumference of the stop sleeve. The two anti-rotation plates are used to be inserted into the two anti-rotation holes in a one-to-one correspondence. The locking method is: after the hexagonal nut is locked in place, the anti-rotation sleeve is put on the screw rod with the anti-rotation teeth located in the anti-rotation groove until it abuts against the hexagonal nut, and then the anti-rotation plate is bent and inserted into the anti-rotation hole, thereby preventing the hexagonal nut from loosening.

[0017] Embodiment 2 is different from Embodiment 1 in that:

[0018] See also Figure 2 All the anti-rotation holes are connected to form an annular groove 25 extending along the circumference of the hexagonal nut, and the anti-rotation sheet cooperates with the bottom surface of the anti-rotation hole to achieve anti-rotation. A regular hexagonal prism section 26 is provided at one end of the screw rod away from the bolt head.

[0019] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0020] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bolt-nut connection structure capable of preventing loosening, comprising a bolt and a hexagonal nut, wherein the bolt comprises a screw rod and a bolt head arranged at the other end of the screw rod, and the hexagonal nut is used to be threadedly connected to the bolt to fix an object, characterized in that: It also includes a stop sleeve for being sleeved on the screw, a stop hole is provided on the outer surface of the hexagonal nut, a stop groove is provided on the circumferential surface of the screw, the stop groove extends along the axial direction of the screw and passes through the end of the screw away from the bolt head, the stop groove is located at the connection between the two half threaded sections, the stop sleeve is provided with a stop tooth for being inserted into the stop groove and a stop plate for being inserted into the stop hole, and the stop plate is a bendable structure.

2. A bolt and nut connection structure capable of preventing loosening according to claim 1, characterized in that: There are two anti-rotation grooves and two anti-rotation teeth, and the two anti-rotation teeth are used to be inserted into the two anti-rotation grooves in a one-to-one correspondence.

3. A bolt and nut connection structure capable of preventing loosening according to claim 2, characterized in that: The two anti-rotation grooves are evenly distributed along the circumference of the screw.

4. A bolt-nut connection structure capable of preventing loosening according to claim 1, 2 or 3, characterized in that: The anti-rotation holes are arranged on both surfaces of the hexagonal nut, and there are two anti-rotation plates, which are used to be respectively inserted into the two anti-rotation holes.

5. The bolt and nut connection structure capable of preventing loosening according to claim 4, characterized in that: The two anti-rotation plates are evenly distributed along the circumference of the anti-rotation sleeve.

6. A bolt-nut connection structure capable of preventing loosening according to claim 1, 2 or 3, characterized in that: The anti-rotation holes are arranged on the six faces of the hexagonal nut, and all the anti-rotation holes are connected to form an annular groove extending along the circumference of the hexagonal nut, and the anti-rotation plates cooperate with the bottom surfaces of the anti-rotation holes to achieve anti-rotation.

7. A bolt-nut connection structure capable of preventing loosening according to claim 1, 2 or 3, characterized in that: A regular hexagonal column section is arranged at one end of the screw rod away from the bolt head.

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