A reliable anti-loosening fastening structure

Abstract

This utility model provides a reliable anti-loosening fastening structure, relating to the field of anti-loosening fastening technology, comprising: a bolt, the bolt's shank including a first threaded portion and a second threaded portion arranged sequentially, the first threaded portion and the second threaded portion having opposite thread directions, and the diameter of the first threaded portion being larger than the diameter of the second threaded portion; a first nut and a second nut, the first nut and the second nut respectively threadedly engaging with the first threaded portion and the second threaded portion, the first nut being able to accommodate the second threaded portion passing through; an elastic component disposed between the first nut and the second nut; and a sleeve, the sleeve being fitted over the outside of the first nut and the second nut, and having a limiting engagement with the outer periphery of the first nut and the second nut; solving the problem that existing fastening and anti-loosening methods are difficult to meet the fastening conditions of frequent vibration or swaying.

Description

Technical Field

[0001] This utility model belongs to the field of anti-loosening fastening technology, and more specifically, relates to a reliable anti-loosening fastening structure. Background Technology

[0002] For fastener anti-loosening, common methods include using spring washers, anti-loosening washers, and thread-locking adhesive. Spring washers and anti-loosening washers have limited anti-loosening effects, and their reliability is low under vibration or swaying conditions. Thread-locking adhesive provides relatively better tightening, but it still cannot meet the needs of frequent vibration or swaying conditions. Therefore, to significantly improve the anti-loosening effect and reliability of fasteners, a new reliable anti-loosening fastening structure needs to be designed to meet the requirements of fastening conditions with frequent vibration or swaying. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a reliable anti-loosening fastening structure, thus solving the problem that existing fastening and anti-loosening methods are insufficient for fastening conditions involving frequent vibration or swaying.

[0004] To achieve the above objectives, this utility model provides a reliable anti-loosening fastening structure, comprising:

[0005] A bolt, wherein the bolt shank includes a first threaded portion and a second threaded portion arranged sequentially, the first threaded portion and the second threaded portion having opposite thread directions, and the diameter of the first threaded portion being larger than the diameter of the second threaded portion;

[0006] A first nut and a second nut, which are threadedly engaged with the first threaded portion and the second threaded portion, respectively, and the first nut is capable of accommodating the passage of the second threaded portion;

[0007] An elastic component is disposed between the first nut and the second nut;

[0008] A sleeve is fitted around the outside of the first nut and the second nut, and engages with the outer periphery of the first nut and the second nut for limiting.

[0009] Optionally, the elastic component is an elastic washer.

[0010] Optionally, the elastic component is a spring.

[0011] Optionally, the elastic component is a perforated spring sheet.

[0012] Optionally, both the first nut and the second nut are hexagonal nuts, and the sleeve is provided with an internal hexagonal hole that mates with the first nut and the second nut.

[0013] Optionally, the sleeve is glued to the first nut and the second nut.

[0014] Optionally, the sleeve is made of a magnetic material, and the sleeve is magnetically connected to the first nut and the second nut or to the fastened component.

[0015] Optionally, the bolt further includes a nut portion, wherein the first threaded portion is closer to the nut portion than the second threaded portion.

[0016] This utility model provides a reliable anti-loosening fastening structure, the advantages of which are as follows: This reliable anti-loosening fastening structure uses a first nut and a second nut with opposite rotation directions to cooperate with a first threaded part and a second threaded part arranged sequentially on a screw component, forming a positive and negative double nut anti-loosening structure. When the first nut applies a fastening force to the fastened component, the reverse torque of the second nut inhibits the rotation tendency of the first nut. At the same time, it has a sleeve, which can be used to fit the tightened first nut and the second nut, and form a limiting fit with the first nut and the second nut, eliminating the loosening space of the first nut and the second nut rotating relative to each other, improving the reliability of anti-loosening, and making it able to adapt to fastening conditions with frequent vibration and swaying that require high anti-loosening reliability; In order to ensure that the angle between the second nut and the first nut is consistent when the second nut is tightened, so that the sleeve can be smoothly fitted on the outside of the first nut and the second nut, an elastic component is provided between the second nut and the first nut. The elastic coefficient of the elastic component can be selected according to the tightening requirements between the first nut and the second nut.

[0017] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0018] The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings, in which like reference numerals generally represent like parts.

[0019] Figure 1 A three-dimensional structural schematic diagram of a reliable anti-loosening fastening structure according to an embodiment of the present invention is shown.

[0020] Figure 2 A cross-sectional schematic diagram of a reliable anti-loosening fastening structure according to an embodiment of the present invention is shown.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Bolt; 2. First threaded part; 3. Second threaded part; 4. First nut; 5. Second nut; 6. Elastic component; 7. Sleeve. Detailed Implementation

[0023] Preferred embodiments of the present invention will now be described in more detail. While preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0024] like Figure 1 and Figure 2 As shown, this utility model provides a reliable anti-loosening fastening structure, comprising:

[0025] Bolt 1, the bolt portion of bolt 1 includes a first threaded portion 2 and a second threaded portion 3 arranged sequentially, the first threaded portion 2 and the second threaded portion 3 have opposite thread directions, and the diameter of the first threaded portion 2 is larger than the diameter of the second threaded portion 3;

[0026] The first nut 4 and the second nut 5 are threadedly engaged with the first threaded portion 2 and the second threaded portion 3, respectively. The first nut 4 can accommodate the second threaded portion 3 to pass through.

[0027] Elastic component 6 is disposed between the first nut 4 and the second nut 5;

[0028] Sleeve 7 is sleeved on the outside of the first nut 4 and the second nut 5, and is in a limiting fit with the outer periphery of the first nut 4 and the second nut 5.

[0029] Specifically, to address the problem that existing fastening and anti-loosening methods are insufficient for fastening conditions involving frequent vibration or swaying, this invention provides a reliable anti-loosening fastening structure. This structure employs a first nut 4 and a second nut 5 with opposite rotation directions, which engage with a first threaded portion 2 and a second threaded portion 3 sequentially arranged on a screw component, forming a double-nut anti-loosening structure. When the first nut 4 applies a fastening force to the fastened component, the reverse torque of the second nut 5 suppresses the rotational tendency of the first nut 4. Simultaneously, a sleeve 7 is provided, which can enclose the tightened first nut 4 and second nut 5, forming a limiting fit and eliminating any loosening space caused by relative rotation between the first nut 4 and second nut 5. This improves the reliability of the anti-loosening mechanism, enabling it to adapt to fastening conditions requiring high reliability against frequent vibration and swaying. To ensure that the angle between the second nut 5 and the first nut 4 is consistent when tightened, allowing the sleeve 7 to smoothly fit over the outside of the first nut 4 and second nut 5, an elastic component 6 is provided between the second nut 5 and the first nut 4. The elastic coefficient of the elastic component 6 can be selected according to the tightening requirements between the first nut 4 and the second nut 5.

[0030] Optionally, the elastic component 6 is an elastic washer.

[0031] Specifically, one or two elastic washers can be installed as needed.

[0032] In this embodiment, an elastic washer is used and placed between the second nut 5 and the first nut 4.

[0033] In other embodiments, the elastic member 6 is a spring.

[0034] In other embodiments, the elastic member 6 may also be a perforated spring.

[0035] Specifically, the elastic component 6 is sleeved on the outside of the threaded portion of the bolt 1. While forming a push against the second nut 5 and the first nut 4, more importantly, it provides a certain adjustable space for the tightening angle of the second nut 5, making it easy to tighten the second nut 5 to the same angle as the first nut 4, and thus making it easy for the sleeve 7 to be sleeved on the outside of the tightened first nut 4 and the second nut 5.

[0036] Optionally, the first nut 4 and the second nut 5 are both hexagonal nuts, and the sleeve 7 is provided with an internal hexagonal hole that mates with the first nut 4 and the second nut 5.

[0037] Specifically, since the primary goal of this reliable anti-loosening fastening structure is to improve the anti-loosening effect and reliability, some ease of disassembly can be sacrificed, and the fit between the sleeve 7 and the first nut 4 and the second nut 5 can be appropriately tight.

[0038] In this embodiment, the sleeve 7 is connected to the first nut 4 and the second nut 5 by adhesive bonding.

[0039] Specifically, to fix the sleeve 7 and prevent it from loosening, glue can be applied to the inner circumference of the sleeve 7 to bond it to the first nut 4 and the second nut 5.

[0040] In other embodiments, the sleeve 7 is made of magnetic material and is magnetically connected to the first nut 4 and the second nut 5 or to the fastened component.

[0041] Optionally, the bolt 1 also includes a nut portion, wherein the first threaded portion 2 is closer to the nut portion than the second threaded portion 3.

[0042] Specifically, the nut portion of bolt 1 forms a limit on one side of the fastened component, and the first nut 4 and the second nut 5 are screwed onto the other side of the fastened component.

[0043] In summary, when using the reliable anti-loosening fastening structure provided by this utility model, taking the installation and fastening of a component requiring reliable anti-loosening on a new energy ship as an example: first, pass the threaded part of the bolt 1 through the mounting hole of the component to be fastened, then tighten the first nut 4, using the first nut 4 to provide the main fastening force. Then, install the elastic washer, and then screw the second nut 5 onto the second threaded part 3. The second nut 5 gradually presses the elastic washer. When a certain clamping force is applied to the elastic washer, observe the angle of the outer peripheral edge of the second nut 5 and make it the same as the angle of the outer peripheral edge of the first nut 4. Finally, apply glue to the inner peripheral surface of the sleeve 7 and put the sleeve 7 on the outer periphery of the first nut 4 and the second nut 5 to form a highly reliable anti-loosening fastening.

[0044] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A reliable anti-loosening fastening structure, characterized in that, include: A bolt, wherein the bolt shank includes a first threaded portion and a second threaded portion arranged sequentially, the first threaded portion and the second threaded portion having opposite thread directions, and the diameter of the first threaded portion being larger than the diameter of the second threaded portion; A first nut and a second nut, which are respectively threaded into the first threaded portion and the second threaded portion, and the first nut is capable of accommodating the second threaded portion through which it passes; An elastic component is disposed between the first nut and the second nut; A sleeve is fitted around the outside of the first nut and the second nut, and engages with the outer periphery of the first nut and the second nut for limiting.

2. The reliable anti-loosening fastening structure according to claim 1, characterized in that, The elastic component is an elastic washer.

3. The reliable anti-loosening fastening structure according to claim 1, characterized in that, The elastic component is a spring.

4. The reliable anti-loosening fastening structure according to claim 1, characterized in that, The elastic component is a perforated spring sheet.

5. The reliable anti-loosening fastening structure according to claim 1, characterized in that, Both the first nut and the second nut are hexagonal nuts, and the sleeve is provided with an internal hexagonal hole that mates with the first nut and the second nut.

6. The reliable anti-loosening fastening structure according to claim 1, characterized in that, The sleeve is connected to the first nut and the second nut by adhesive.

7. The reliable anti-loosening fastening structure according to claim 1, characterized in that, The sleeve is made of magnetic material and is magnetically connected to the first nut and the second nut or to the fastened component.

8. The reliable anti-loosening fastening structure according to claim 1, characterized in that, The bolt also includes a nut portion, wherein the first threaded portion is closer to the nut portion than the second threaded portion.

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