Bolt assembly

Abstract

The utility model relates to a bolt assembly which comprises a bolt, a nut and a sealing piece, the bolt is connected with the nut, the sealing piece is arranged on the bolt in a sleeved mode and located between the bolt and the nut, the bolt comprises a head portion, a rod body and a thread portion, the diameter of the rod body is smaller than that of the head portion, the rod body is a smooth face, and the thread portion and the rod body are coaxially arranged. An annular groove is formed between the rod body and the threaded part, the sealing piece is arranged in the annular groove of the bolt in a sleeved mode and located above the threaded part, the sealing piece comprises an annular sealing part and an annular base connected with the annular sealing part, the outer diameter of the annular sealing part is smaller than that of the annular base, and the annular base is arranged in a containing cavity of the nut. At least part of the annular sealing part is located in a gap between the bolt and the material. According to the bolt assembly, the sealing performance between the bolt and materials can be enhanced when the bolt is locked, and the application range is wide; in addition, the risk that the bolt is disassembled by a common tool can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a bolt assembly. Background Art

[0002] Bolts are a commonly used mechanical connection part, mainly used to tightly connect two or more parts together. Usually a bolt consists of three parts: a bolt rod, a screw head, and a thread. In order to improve the sealing performance of the bolt connection, in the prior art, a sealing sleeve is usually provided on the bolt to make the sealing performance better after the nut is tightened. For example, the patent with announcement number CN208749741U discloses a steel corrugated plate connecting bolt and nut with good sealing effect, wherein a sealing gasket is connected to the bottom surface of the nut and the nut of the connecting bolt, and the bottom surface of the sealing gasket on the bottom surface of the nut of the connecting bolt is a convex or concave arc plane, and the arc degree of the arc plane matches the arc degree of the trough or peak of the steel corrugated plate. However, the above technical solution needs to customize the arc plane of the sealing gasket according to the shape of the material, and its versatility is poor. Utility Model Content

[0003] In order to solve the problems of the prior art, the utility model provides a bolt assembly with better sealing performance and wider application range.

[0004] The specific technical solution is as follows: A bolt assembly includes a bolt, a nut and a seal. The bolt is connected to the nut, and the seal is sleeved on the bolt and located between the bolt and the nut. The bolt includes a head, a rod body and a threaded portion. The diameter of the rod body is smaller than that of the head. The rod body is a smooth surface. The threaded portion and the rod body are coaxially arranged. An annular groove is provided between the rod body and the threaded portion. The seal is sleeved in the annular groove of the bolt and is located above the threaded portion. The seal includes an annular sealing portion and an annular base connected to the annular sealing portion. The outer diameter of the annular sealing portion is smaller than the annular base. The annular base is arranged in the accommodating cavity of the nut. After the nut is tightened, at least part of the annular sealing portion is located in the gap between the bolt and the material.

[0005] In some embodiments, a connecting hole is provided in the bolt, the connecting hole passes through the bottom of the bolt, and an internal thread is provided in the connecting hole.

[0006] In some embodiments, the upper surface of the annular base is exposed outside the accommodating cavity.

[0007] In some embodiments, the accommodating cavity is annular, an operating portion is provided at one end of the accommodating cavity, and the cross-section of the operating portion is rectangular.

[0008] In some embodiments, the head is provided with a plurality of slots arranged at intervals, and spherical protrusions are formed between the slots.

[0009] In some embodiments, the card slot includes a first plane and a second plane, and the second plane is perpendicular to the first plane.

[0010] In some embodiments, the first plane has a first arcuate side, and the second plane has a second arcuate side.

[0011] In some embodiments, it is characterized in that there are three card slots.

[0012] The technical effect of the utility model: A bolt assembly of the utility model can enhance the sealing between the bolt and the material when the bolt is tightened, and has a wide range of applications; in addition, it can reduce the risk of the bolt being disassembled by common tools. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of a bolt assembly according to an embodiment of the present utility model.

[0014] Figure 2 Schematic diagram of a bolt according to an embodiment of the present invention.

[0015] Figure 3 It is a cross-sectional view of a bolt assembly according to an embodiment of the present utility model.

[0016] Figure 4 Schematic diagram of the annular sealing portion of an embodiment of the present invention.

[0017] Figure 5 It is a schematic diagram of a disassembly and assembly tool according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0018] The essential features and advantages of the present invention are further described below with reference to examples, but the present invention is not limited to the examples listed.

[0019] like Figures 1 to 5As shown, a bolt assembly according to this embodiment includes a bolt 1, a nut 2, and a seal 3. The bolt 1 is connected to the nut 2, and the seal 3 is mounted on the bolt 1 and positioned between the bolt 1 and the nut 2. The bolt 1 includes a head 11, a shank 12, and a threaded portion 13. The diameter of the shank 12 is smaller than that of the head 11, and the shank 12 is smooth. The threaded portion 13 and the shank 12 are coaxially arranged, with an annular groove 14 defined between the shank 12 and the threaded portion 13. The seal 3 is mounted within the annular groove 14 of the bolt and positioned above the threaded portion 13. The seal 3 includes an annular sealing portion 31 and an annular base 32 connected to the annular sealing portion 31. The outer diameter of the annular sealing portion 31 is smaller than that of the annular base 32. The annular base 32 is positioned within the accommodating cavity 21 of the nut 2. When the nut 2 is tightened, at least a portion of the annular seal 31 is positioned within the gap 101 between the bolt 1 and the material 10. In the above technical solution, tightening the nut allows the annular seal 31 to engage with the gap 101, improving sealing performance. In addition, the annular base 32 is disposed in the accommodating cavity 21. The annular base 32 pushes the annular sealing portion 31 to deform by the extrusion of the nut 2, thereby forming a protrusion 311, further improving the sealing performance. The above technical solution can enhance the sealing performance between the bolt and the material when tightening.

[0020] In this embodiment, the bolt 1 is provided with a connection hole 15 extending through the bottom of the bolt 1. The connection hole 15 is provided with an internal thread 151, allowing the external connector 20 to be threadedly inserted into the connection hole 15, thereby connecting the material 10 to the connector 20. The upper surface 321 of the annular base 32 is exposed outside the accommodating cavity 21. In other words, the upper surface 321 is positioned higher than the upper surface of the accommodating cavity 21. The upper surface 321 is projecting externally, thereby preventing the nut 2 from colliding with the material. The accommodating cavity 21 is annular, and an operating portion 22 is provided at one end. The operating portion 22 has a rectangular cross-section, facilitating the use of a tool to connect the operating portion and rotate the nut.

[0021] In this embodiment, the head 11 is provided with a plurality of spaced-apart slots 4, with spherical protrusions 5 formed between the slots 4. This technical solution makes the head 11 difficult to disassemble with common tools, reducing the risk of unauthorized disassembly. This embodiment has three slots 4, which are mated with a rotatable knob using a disassembly tool 30. The slots 4 include a first flat surface 41 and a second flat surface 42. The second flat surface 42 is perpendicular to the first flat surface 41, allowing the tool 30 to abut against the first and second flat surfaces and rotate when mated with the slots 4. The first flat surface 41 has a first curved edge 411, and the second flat surface 42 has a second curved edge 421.

[0022] A bolt assembly of this embodiment can enhance the sealing between the bolt and the material when it is tightened, and has a wide range of applications; in addition, it can reduce the risk of the bolt being disassembled by common tools.

[0023] It should be noted that the above preferred embodiments are merely illustrative of the technical concepts and features of the present invention. Their purpose is to enable those familiar with the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications based on the spirit of the present invention are intended to fall within the scope of protection of the present invention.

Claims

1. A bolt assembly, comprising a bolt, a nut and a seal, wherein the bolt is connected to the nut, and the seal is sleeved on the bolt and located between the bolt and the nut, characterized in that: The bolt includes a head, a rod body and a threaded portion. The diameter of the rod body is smaller than that of the head. The rod body is a smooth surface. The threaded portion and the rod body are coaxially arranged. An annular groove is provided between the rod body and the threaded portion. The sealing member is sleeved in the annular groove of the bolt and is located above the threaded portion. The sealing member includes an annular sealing portion and an annular base connected to the annular sealing portion. The outer diameter of the annular sealing portion is smaller than the annular base. The annular base is provided in the accommodating cavity of the nut. After the nut is tightened, at least part of the annular sealing portion is located in the gap between the bolt and the material.

2. The bolt assembly according to claim 1, characterized in that: A connecting hole is provided in the bolt, the connecting hole passes through the bottom of the bolt, and an internal thread is provided in the connecting hole.

3. The bolt assembly according to claim 1, wherein: The upper surface of the annular base is exposed outside the accommodating cavity.

4. The bolt assembly according to claim 1, wherein: The accommodating cavity is annular, and an operating portion is provided at one end of the accommodating cavity, and the cross section of the operating portion is rectangular.

5. The bolt assembly according to claim 1, characterized in that: The head is provided with a plurality of slots arranged at intervals, and spherical convex parts are formed between the slots.

6. The bolt assembly according to claim 5, characterized in that: The card slot includes a first plane and a second plane, and the second plane is perpendicular to the first plane.

7. The bolt assembly according to claim 6, characterized in that: The first plane has a first arcuate side, and the second plane has a second arcuate side.

8. The bolt assembly according to claim 7, characterized in that: There are three card slots.

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