Anti-loosening nut

Abstract

The present invention relates to the technical field of anti-loosening nuts, and provides an anti-loosening nut, including an eccentric nut with a convex surface and a non-eccentric nut with a groove; the non-eccentric nut is provided with a plurality of blind holes; an embedded metal part is arranged in the blind hole, and the density of the embedded metal part is greater than the density of the non-eccentric nut, and is used to absorb the vibration energy on the non-eccentric nut. The anti-loosening nut provided by the present invention is provided with an embedded metal part in the non-eccentric nut with a groove, and the embedded metal part is used to absorb a part of the vibration energy by utilizing the high density of the embedded metal part, so as to achieve the effect of stopping vibration, prevent the nut from being tightened due to the vibration, and make the subsequent disassembly free and easy, so that it can be never loosened and can be disassembled freely and repeatedly used.

Description

Technical Field

[0001] The invention relates to the technical field of anti-loosening nuts, and in particular to an anti-loosening nut. Background Art

[0002] In the prior art, for example, the anti-loosening nut produced by HARDLOCK generates strong resistance by the cooperation of two nuts with wedge-shaped concave and convex parts, and stabilizes the nuts to each other to prevent loosening. However, as the vibration level and time increase, the two nuts are tightened more and more, and eventually it is difficult to disassemble. It is extremely inconvenient to use on petroleum machinery that needs to be anti-vibration and stop, and also needs to be regularly disassembled for maintenance, transfer, etc. The consequence is that it cannot be disassembled freely and needs to be disassembled destructively, resulting in huge waste. Summary of the invention

[0003] Therefore, the technical problem to be solved by the present invention is that the anti-loosening nut in the prior art becomes more and more difficult to disassemble as the vibration degree and time increase, and the two nuts are tightened together. It is extremely inconvenient to use on petroleum machinery that needs to be anti-vibration and anti-retreat, and also needs to be regularly disassembled for inspection, transfer, etc. The consequence is that it cannot be disassembled freely and destructive disassembly is required, resulting in huge waste, thereby providing an anti-loosening nut.

[0004] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0005] The present invention provides an anti-loosening nut, comprising an eccentric nut with a convex surface and a non-eccentric nut with a groove; the non-eccentric nut is provided with a plurality of blind holes; an embedded metal piece is arranged in the blind holes, the density of the embedded metal piece is greater than the density of the non-eccentric nut, and is used to absorb vibration energy on the non-eccentric nut.

[0006] Furthermore, the blind hole is arranged on an end surface of the non-eccentric nut away from the eccentric nut.

[0007] Furthermore, six blind holes are provided, and the six blind holes are evenly distributed in a circular array on the end surface of the non-eccentric nut.

[0008] Furthermore, the blind hole is arranged on a side surface of the non-eccentric nut.

[0009] Furthermore, the blind hole is arranged at a central position of the side surface.

[0010] Furthermore, the blind holes are provided on each side of the non-eccentric nut; the embedded metal parts are embedded simultaneously in the blind holes on two opposite sides as a group; and one, two or three groups of embedded metal parts are provided on the non-eccentric nut.

[0011] Furthermore, the depth of the blind hole ranges from 12 mm to 15 mm; the diameter of the blind hole ranges from 6 mm to 10 mm.

[0012] Furthermore, the embedded metal piece is a lead metal strip.

[0013] Furthermore, the anti-loosening nut also includes a sealing cap, and the embedded metal part is fixedly sealed in the blind hole through the sealing cap.

[0014] Furthermore, the surfaces of the non-eccentric nut and the eccentric nut are both provided with a coating for preventing corrosion and rust.

[0015] The technical solution of the present invention has the following advantages:

[0016] The anti-loosening nut provided by the present invention is provided with an embedded metal part in a non-eccentric nut with a groove. The high density of the embedded metal part is utilized to absorb a part of the vibration energy, thereby achieving the effect of stopping vibration and preventing the nut from becoming tighter due to the vibration. The subsequent disassembly also becomes free and easy, so that the nut will never loosen and can be easily disassembled and reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 is a top view of an eccentric nut in an anti-loosening nut in an embodiment of the present invention;

[0019] Figure 2 is a side view (partially cut away) of an eccentric nut in an anti-loosening nut in an embodiment of the present invention;

[0020] Figure 3 A top view of a non-eccentric nut in an anti-loosening nut in an embodiment of the present invention;

[0021] Figure 4 It is a side view (partially cut away) of a non-eccentric nut in an anti-loosening nut in an embodiment of the present invention.

[0022] Description of reference numerals:

[0023] 1. Eccentric nut; 2. Non-eccentric nut; 3. Embedded metal part; 4. Side; 5. End face. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] like Figures 1 to 4 As shown, this embodiment provides an anti-loosening nut, including an eccentric nut 1 with a convex surface and a non-eccentric nut 2 with a groove, to form a nut set. This part of the structure is the same as the anti-loosening nut in the prior art, and will not be repeated here. The difference is that the non-eccentric nut 2 is provided with a plurality of blind holes, which can be round holes, square holes or holes of other shapes; the embedded metal part 3 can fill the entire blind hole in an interference fit manner, or be filled in the blind hole in an adhesive or welding manner, and the density of the embedded metal part 3 is greater than that of the non-eccentric nut 2, and is used to absorb the vibration energy on the non-eccentric nut 2.

[0029] The anti-loosening nut provided in the present embodiment is provided with an embedded metal part 3 in the non-eccentric nut 2 with a groove. The high density of the embedded metal part 3 is utilized to absorb a part of the vibration energy, thereby achieving the effect of stopping vibration and preventing the nut from becoming tighter due to the vibration. The subsequent disassembly also becomes free and easy, so that the nut will never loosen and can be easily disassembled and reused.

[0030] like Figure 3 As shown, the blind hole can be arranged on the end face 5 of the non-eccentric nut 2 away from the eccentric nut 1. For example, six blind holes can be arranged, and the six blind holes are evenly distributed in a circular array on the end face 5 of the non-eccentric nut 2. For example, other numbers of blind holes can also be arranged, and multiple blind holes are evenly distributed in a circular array on the end face 5 of the non-eccentric nut 2. In this way, the more evenly the distribution of the embedded metal part 3 is, the better the vibration absorption effect is.

[0031] like Figure 4 As shown, the blind hole can also be set on the side 4 of the non-eccentric nut 2. For example, the blind hole is set at the center of the side 4. For example, each side 4 of the non-eccentric nut 2 can be provided with a blind hole; the embedded metal parts 3 are embedded simultaneously in a group of blind holes on two opposite sides 4; the non-eccentric nut 2 is provided with one, two or three groups of embedded metal parts 3. When in use, for petroleum machinery, several groups of embedded metal parts 3 can be selected and designed according to the depth of the oil well. For example, for a well depth of 500 meters, a non-eccentric nut 2 with a group of embedded metal parts 3 can be selected, and for a well depth of 3000-4000 meters, a non-eccentric nut 2 with three groups of embedded metal parts 3 can be used.

[0032] The depth of the blind hole may range from 12 mm to 15 mm, and the diameter of the blind hole may range from 6 mm to 10 mm. The specific size of the blind hole may be selected according to actual needs.

[0033] The embedded metal part 3 may be a lead metal strip, or may be other metal strips with a density greater than that of steel.

[0034] The anti-loosening nut also includes a sealing cap. After the embedded metal part 3 is installed in the blind hole, the opening of the blind hole can be welded and sealed by the steel sealing cap to fix the embedded metal part 3 in the blind hole.

[0035] The surfaces of the non-eccentric nut 2 and the eccentric nut 1 are both provided with a coating for corrosion resistance. For example, when the anti-loosening nut is used for connecting oil pumping and drilling supports on an offshore platform, anti-corrosion paint can be sprayed on the surface of the anti-loosening nut.

[0036] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. An anti-loosening nut, comprising an eccentric nut (1) with a convex surface and a non-eccentric nut (2) with a groove; characterized in that: The non-eccentric nut (2) is provided with a plurality of blind holes; An embedded metal part (3) is arranged in the blind hole, the density of the embedded metal part (3) being greater than the density of the non-eccentric nut (2) and being used to absorb vibration energy on the non-eccentric nut (2); The blind hole is arranged on an end surface (5) of the non-eccentric nut (2) away from the eccentric nut (1); or the blind hole is arranged on a side surface (4) of the non-eccentric nut (2); When the blind hole is arranged on the side surface (4) of the non-eccentric nut (2), each side surface (4) of the non-eccentric nut (2) is provided with the blind hole; the embedded metal parts (3) are embedded simultaneously with the blind holes on two opposite side surfaces (4) as a group; the non-eccentric nut (2) is provided with one, two or three groups of embedded metal parts (3); The embedded metal piece (3) is a lead metal strip; It also comprises a sealing cap, through which the embedded metal part (3) is fixedly sealed in the blind hole.

2. The anti-loosening nut according to claim 1, characterized in that: When the blind hole is arranged on the end surface (5) of the non-eccentric nut (2) away from the eccentric nut (1), six blind holes are arranged, and the six blind holes are evenly distributed in a circular array on the end surface (5) of the non-eccentric nut (2).

3. The anti-loosening nut according to claim 1, characterized in that: The blind hole is arranged at the center of the side surface (4).

4. The anti-loosening nut according to claim 1, characterized in that: The depth of the blind hole ranges from 12 mm to 15 mm; The diameter of the blind hole ranges from 6 mm to 10 mm.

5. The anti-loosening nut according to claim 1, characterized in that: The surfaces of the non-eccentric nut (2) and the eccentric nut (1) are both provided with a coating for preventing corrosion and rust.

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