A type of anti-loosening fastening structure

Abstract

This utility model provides an anti-loosening fastening structure, relating to the field of 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; a washer, the washer having at least two bent portions on its outer periphery, at least one of which is used to fit against the outer peripheral surface of the first nut, and at least one of which is used to fit against the outer peripheral surface of the second nut; solving the problems of poor reliability and difficulty in disassembly in the prior art of using spring washers, thread sealant, etc. for anti-loosening.

Description

Technical Field

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

[0002] Traditional methods for preventing loosening of bolts and nuts include using spring washers and threadlocker. Spring washers have limited effectiveness, and their effectiveness decreases after removal and re-tightening. Threadlocker methods, while effective, make nut or bolt removal difficult and hinder maintenance. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by providing an anti-loosening fastening structure, which solves the problems of poor reliability and difficulty in disassembly caused by using methods such as setting spring washers and applying thread sealant to prevent loosening.

[0004] To achieve the above objectives, this utility model provides an 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] A gasket, wherein the outer periphery of the gasket is provided with at least two bends, wherein at least one bend is used to fit against the outer periphery of the first nut, and wherein at least one bend is used to fit against the outer periphery of the second nut.

[0008] Optionally, the bolt further includes a nut portion, wherein the first threaded portion is closer to the nut portion than the second threaded portion.

[0009] Optionally, both the first nut and the second nut are hexagonal nuts.

[0010] Optionally, the outer periphery of the gasket is provided with a first bend, which bends toward the direction of the first nut.

[0011] Optionally, the first bent portion is sheet-shaped.

[0012] Optionally, the first bent portion forms a right angle with the gasket, and one side surface of the first bent portion is in contact with one edge of the first nut.

[0013] Optionally, the outer periphery of the gasket is provided with a second bend, which bends toward the direction of the second nut.

[0014] Optionally, the second bent portion is sheet-shaped.

[0015] Optionally, the second bend forms an obtuse angle with the washer, and a gap is formed between the second bend and the outer periphery of the second nut.

[0016] This utility model provides an anti-loosening fastening structure, the advantages of which are as follows: the 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 to form 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, a washer with at least two bends can be limited by at least one bend to fit against the outer peripheral surface of the first nut, and limited by at least one bend to fit against the outer peripheral surface of the second nut. By physically interfering with the micro-movement space of the nut, the rotation path of the nut is further blocked, achieving effective anti-loosening without relying on external media.

[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 an anti-loosening fastening structure according to an embodiment of the present invention is shown.

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

[0021] Figure 3 A side view of an anti-loosening fastening structure according to an embodiment of the present invention is shown.

[0022] Figure 4 It shows Figure 3 A schematic diagram of the cross-section structure along direction A.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Bolt; 2. First threaded part; 3. Second threaded part; 4. First nut; 5. Second nut; 6. Washer; 7. First bend; 8. Second bend. Detailed Implementation

[0025] 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.

[0026] like Figures 1 to 4 As shown, this utility model provides an anti-loosening fastening structure, comprising:

[0027] 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;

[0028] 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.

[0029] The washer 6 has at least two bends on its outer periphery, at least one of which is used to fit against the outer periphery of the first nut 4 and at least one of which is used to fit against the outer periphery of the second nut 5.

[0030] Specifically, to address the problems of poor reliability and difficult disassembly associated with existing anti-loosening methods such as using spring washers and thread sealant, this utility model provides an anti-loosening fastening structure. This structure employs a first nut 4 and a second nut 5 with opposite rotation directions, which cooperate 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 tightening force to the fastened component, the reverse torque of the second nut 5 suppresses the rotational tendency of the first nut 4. Simultaneously, a washer 6 with at least two bends can be positioned by at least one bend against the outer circumferential surface of the first nut 4 and by at least one bend against the outer circumferential surface of the second nut 5. This physical interference blocks the micro-movement space of the nut, further blocking the rotation path of the nut, achieving effective anti-loosening without relying on external media. This anti-loosening fastening structure requires no adhesives or elastic elements, is reliable in preventing loosening, and is easy to disassemble. It is suitable for harsh working conditions such as high temperature and corrosion. Furthermore, because the bends can be bent, it can be repeatedly disassembled and reassembled without diminishing its anti-loosening performance.

[0031] 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.

[0032] 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.

[0033] Optionally, both the first nut 4 and the second nut 5 are hexagonal nuts.

[0034] Specifically, hexagonal nuts are used to ensure their versatility and facilitate the limiting of the nut by the bending part.

[0035] Optionally, the outer periphery of the gasket 6 is provided with a first bend 7, which bends toward the direction of the first nut 4.

[0036] Specifically, since the first nut 4 is used to provide the main tightening force, the washer 6 is installed after the first nut 4 is tightened. Only one first bend 7 needs to be set on the washer 6. The first bend 7 can be aligned with one edge of the first nut 4 during installation, which is very convenient.

[0037] Optionally, the first bent portion 7 is sheet-like.

[0038] Specifically, a sheet-like first bent portion 7 is adopted to facilitate fitting and limiting the position with the edge of the first nut 4.

[0039] Optionally, the first bent portion 7 forms a right angle with the washer 6, and one side surface of the first bent portion 7 is in contact with one edge of the first nut 4.

[0040] Specifically, as shown above, the washer 6 is installed after the first nut 4 is tightened. Therefore, the first bent part 7 does not need to consider the tightening of the first nut 4 and the orientation of its edge. The first bent part 7 on the washer 6 can be directly attached to one edge of the first nut 4 during installation.

[0041] Optionally, the outer periphery of the gasket 6 is provided with a second bend 8, which bends toward the direction of the second nut 5.

[0042] Specifically, the second bent portion 8 is bent in the opposite direction to the first bent portion 7, for limiting engagement with the outer periphery of the second nut 5.

[0043] Optionally, the second bend 8 is sheet-like.

[0044] Specifically, the second bending part 8 adopts a sheet-like structure, which facilitates bending and deformation of the second bending part 8 so that it can fit into at least one outer peripheral edge of the second nut 5 and limit its position.

[0045] Optionally, the second bend 8 forms an obtuse angle with the washer 6, and a gap is formed between the second bend 8 and the outer periphery of the second nut 5.

[0046] Specifically, since the second nut 5 is tightened after the washer 6 is installed, the bending angle of the second bent part 8 is an obtuse angle, and there is a gap between the second bent part 8 and the outer periphery of the second nut 5 to avoid affecting the tightening of the second nut 5. The gap provides operating space for the second nut 5 and facilitates the operation of the second bent part 8, so that it can be further bent and deformed under the action of the tool after the second nut 5 is installed in place. At least part of the second nut 5 is in contact with at least one edge of the outer periphery of the second nut 5, which has a limiting effect.

[0047] Furthermore, in its initial state, the second bent portion 8 forms an obtuse angle with the washer 6, and there is a gap between its bent portion and the outer peripheral projection of the second nut 5, allowing sufficient clearance. When used to prevent loosening, after the second nut 5 is in place, the second bent portion 8 is further bent with a tool to bring it closer to the second nut 5. Depending on the position of the edge of the second nut 5, the second bent portion 8 can be deformed by tapping or pushing to ensure that at least part of the second bent portion 8 is in contact with and limited by the edge of the second nut 5.

[0048] 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 fastening structure for preventing loosening, 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 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; A gasket, wherein the outer periphery of the gasket is provided with at least two bends, wherein at least one bend is used to fit against the outer periphery of the first nut, and wherein at least one bend is used to fit against the outer periphery of the second nut.

2. The 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.

3. The anti-loosening fastening structure according to claim 1, characterized in that, Both the first nut and the second nut are hexagonal nuts.

4. The anti-loosening fastening structure according to claim 3, characterized in that, The gasket has a first bend on its outer periphery, which bends toward the direction of the first nut.

5. The anti-loosening fastening structure according to claim 4, characterized in that, The first bent portion is sheet-like.

6. The anti-loosening fastening structure according to claim 5, characterized in that, The first bent portion forms a right angle with the gasket, and one side surface of the first bent portion is in contact with one edge of the first nut.

7. The anti-loosening fastening structure according to claim 3, characterized in that, The gasket has a second bend on its outer periphery, which bends toward the direction of the second nut.

8. The anti-loosening fastening structure according to claim 7, characterized in that, The second bent portion is sheet-like.

9. The anti-loosening fastening structure according to claim 8, characterized in that, The second bend forms an obtuse angle with the washer, and a gap is formed between the second bend and the outer periphery of the second nut.

Images