High pressure resistant anti-backout bolt fastener

Abstract

The utility model provides a kind of high-pressure-resistant anti-loose bolt fastener, belong to bolt technical field, including bolt head, anti-loose component and pressure-resistant component;The bottom of bolt head is fixedly installed with stud;The utility model: installation cavity is opened in the inside of nut, the bottom of stud is threadedly connected with anti-loose nut, conical sleeve is installed on the surface of anti-loose nut, inner thread is opened in the middle of conical sleeve, when nut is installed on the surface of stud, conical sleeve is inserted in installation cavity inside by rotating anti-loose nut, the inner wall of installation cavity is equipped with pressure surface position, deformation groove is opened around conical sleeve, and contact surface position is opened on the top outside of conical sleeve, when conical sleeve moves to installation cavity inside, contact surface position is contacted with pressure surface position, conical sleeve is retracted by deformation groove by pressure surface position, so that conical sleeve is tightly connected in hugging state with stud, ensure that nut is tightly connected on the surface of stud, avoid nut to appear loose.

Description

Technical Field

[0001] This utility model relates to the field of bolt technology, specifically to a high-pressure resistant anti-loosening bolt fastener. Background Technology

[0002] Bolted connections are detachable connections, and bolts are indispensable parts in mechanical structures. In high-pressure equipment connections, traditional bolt fasteners have two major drawbacks: First, under high-pressure environments, bolts are prone to axial displacement due to medium pressure, leading to loosening or even failure of the connection; second, under vibration conditions, the gap between the threaded parts gradually widens, causing the nut to loosen. Existing anti-loosening technologies mostly use double nut locking or spring washers, but the former increases the structural weight, and the latter is prone to fatigue failure of the elastic element under high-pressure environments. Therefore, designing a bolt fastener with high-pressure resistance and anti-loosening properties can better meet different usage requirements. Utility Model Content

[0003] The purpose of this invention is to provide a high-pressure resistant anti-loosening bolt fastener to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a high-pressure resistant anti-loosening bolt fastener, comprising a bolt head, an anti-loosening component, and a pressure-resistant component;

[0005] Wherein: a stud is fixedly installed at the bottom of the bolt head, and a nut is threaded onto the surface of the stud;

[0006] The anti-loosening component includes an installation cavity inside the nut, an anti-loosening nut is threaded to the bottom of the stud, a conical sleeve is fixedly installed on the surface of the anti-loosening nut, the conical sleeve has an internal thread inside, the conical sleeve is threaded to the surface of the stud through the internal thread, and the conical sleeve is inserted into the installation cavity.

[0007] The pressure-resistant assembly includes pressure relief grooves formed on the surface of the stud, with three pressure relief grooves arranged radially around the stud and extending to the top of the stud near the bolt head connection.

[0008] As a preferred embodiment of this utility model: the inner wall of the mounting cavity is provided with a pressing surface, the conical sleeve extends around to the connection with the anti-loosening nut and is provided with an open deformation groove, and the top outer side of the conical sleeve is provided with a contact surface.

[0009] As a preferred embodiment of this utility model: the pressing surface and the contact surface are designed with corresponding inclined surfaces.

[0010] As a preferred embodiment of this utility model: a gasket is provided on the outside of the conical sleeve, and the gasket is in contact with the bottom of the nut.

[0011] As a preferred embodiment of this utility model: a spring is sleeved on the surface of the stud, and the spring is disposed between the bolt head and the nut.

[0012] As a preferred embodiment of this utility model, the stud is forged from alloy steel and its surface is nitrided.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) An installation cavity is provided inside the nut. The bottom of the stud is threaded with an anti-loosening nut. A conical sleeve is installed on the surface of the anti-loosening nut. An internal thread is provided in the middle of the conical sleeve. When the nut is installed on the surface of the stud, the conical sleeve is inserted into the installation cavity by turning the anti-loosening nut. The inner wall of the installation cavity is provided with a pressing surface. A deformation groove is provided around the conical sleeve. At the same time, a contact surface is provided on the outer side of the top of the conical sleeve. When the conical sleeve moves into the installation cavity, the contact surface contacts the pressing surface. The pressing surface causes the conical sleeve to retract through the deformation groove, so that the conical sleeve is tightly connected to the stud in a clamping state, ensuring that the nut is tightly connected to the surface of the stud and preventing the nut from loosening.

[0015] (2) The pressure-resistant component includes a pressure relief groove on the surface of the stud. Three pressure relief grooves are provided around the stud in the radial direction. The pressure relief grooves can disperse the pressure on the bottom end of the stud, so that the pressure is dispersed from the axial direction along the radial direction of the stud, thereby reducing the axial displacement of the stud and achieving the pressure-resistant effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the disassembled structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the anti-detachment component structure of this utility model;

[0019] Figure 4 A structural schematic diagram of the pressure relief groove of this utility model is provided.

[0020] In the diagram: 1. Bolt head; 2. Stud; 3. Nut; 4. Anti-loosening component; 41. Mounting cavity; 42. Anti-loosening nut; 43. Tapered sleeve; 44. Internal thread; 5. Pressure-resistant component; 51. Pressure relief groove; 6. Pressing surface; 7. Deformation groove; 8. Contact surface; 9. Washer; 10. Spring. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] Please see Figures 1-4 A high-pressure resistant anti-loosening bolt fastener includes: a bolt head 1, an anti-loosening component 4, and a pressure-resistant component 5; a stud 2 is fixedly installed at the bottom of the bolt head 1, and a nut 3 is threadedly connected to the surface of the stud 2;

[0023] Please see Figure 1 , Figure 2 , Figure 3 The anti-loosening component 4 includes an installation cavity 41 inside the nut 3. The bottom of the stud 2 is threadedly connected to an anti-loosening nut 42. A conical sleeve 43 is fixedly installed on the surface of the anti-loosening nut 42. The conical sleeve 43 has an internal thread 44 inside. The conical sleeve 43 is threaded to the surface of the stud 2 through the internal thread 44. The conical sleeve 43 is inserted into the installation cavity 41. The inner wall of the installation cavity 41 is provided with a pressing surface 6. The conical sleeve 43 extends around to the connection with the anti-loosening nut 42 and has an open deformation groove 7. The top outer side of the conical sleeve 43 has a contact surface 8. The pressing surface 6 and the contact surface 8 are designed with corresponding bevels.

[0024] In practical use: An installation cavity 41 is provided inside the nut 3. The bottom of the stud 2 is threaded with an anti-loosening nut 42. A conical sleeve 43 is installed on the surface of the anti-loosening nut 42. The middle of the conical sleeve 43 is provided with an internal thread 44. After the nut 3 is installed on the surface of the stud 2, the conical sleeve is inserted into the installation cavity 41 by turning the anti-loosening nut 42. The inner wall of the installation cavity 41 is provided with a pressing surface 6. The conical sleeve 43 is provided with a deformation groove 7 around its perimeter. At the same time, a contact surface 8 is provided on the outer side of the top of the conical sleeve 43. When the conical sleeve 43 moves into the installation cavity 41, the contact surface 8 contacts the pressing surface 6. The pressing surface 6 causes the conical sleeve 43 to retract through the deformation groove 7, thereby making the conical sleeve 43 tightly connected to the stud 2, ensuring that the nut 3 is tightly connected to the surface of the stud 2 and preventing the nut 3 from loosening.

[0025] Please see Figure 2 , Figure 4 The pressure-resistant component 5 includes a pressure relief groove 51 formed on the surface of the stud 2. The pressure relief groove 51 has three grooves formed radially around the stud 2 and extends to the top of the stud 2 near the connection of the bolt head 1.

[0026] In practical use: The pressure-resistant component 5 includes a pressure relief groove 51 formed on the surface of the stud 2. The pressure relief groove 51 has three grooves formed around the radial direction of the stud 2. The pressure relief groove 51 can disperse the pressure on the bottom end of the stud 2, so that the pressure is dispersed from the axial direction along the radial direction of the stud 2, thereby reducing the axial displacement of the stud 2 and achieving the pressure resistance effect.

[0027] Please see Figure 3 A gasket 9 is fitted on the outside of the tapered sleeve 43, and the gasket 9 is in contact with the bottom of the nut 3.

[0028] In practical use: a washer 9 is fitted on the outside of the tapered sleeve 43. The washer 9 is in contact with the bottom of the nut 3, so that when the anti-loosening nut 42 drives the tapered sleeve 43 to be inserted into the installation cavity 41, the washer 9 is in close contact with the bottom of the nut 3, which plays a role in preventing loosening at the connection.

[0029] Please see Figure 2 A spring 10 is fitted on the surface of the stud 2, and the spring 10 is located between the bolt head 1 and the nut 3.

[0030] In practical use: A spring 10 is sleeved on the surface of the stud 2. The spring 10 is located between the bolt head 1 and the nut 3. The installation preload of the nut 3 can be adjusted by the spring 10 to prevent the nut 3 from being over-installed.

[0031] Please see Figure 1 Stud 2 is forged from alloy steel and its surface is nitrided.

[0032] In practical use: Stud 2 is forged from alloy steel, which gives it high structural strength and meets the requirements for use in high-pressure environments. The surface of stud 2 is nitrided to form a hardened layer, thereby protecting the hardness of stud 2.

[0033] An installation cavity 41 is provided inside the nut 3. The bottom of the stud 2 is threaded with an anti-loosening nut 42. A conical sleeve 43 is installed on the surface of the anti-loosening nut 42. The middle of the conical sleeve 43 has an internal thread 44. When the nut 3 is installed on the surface of the stud 2, the conical sleeve is inserted into the installation cavity 41 by turning the anti-loosening nut 42. The inner wall of the installation cavity 41 has a pressing surface 6. The conical sleeve 43 has a deformation groove 7 around its perimeter. At the same time, a contact surface 8 is provided on the outer side of the top of the conical sleeve 43. When the conical sleeve 43 moves into the installation cavity 41, the contact surface 8 contacts the pressing surface 6. The pressing surface 6 causes the conical sleeve 43 to retract through the deformation groove 7, so that the conical sleeve 43 is tightly connected to the stud 2, ensuring that the nut 3 is tightly connected to the surface of the stud 2 and preventing the nut 3 from loosening.

[0034] The contents not described in detail in this description are existing technologies known to those skilled in the art. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-pressure resistant anti-loosening bolt fastener, characterized in that, include: Bolt head (1), with a stud (2) fixedly installed at the bottom of the bolt head (1), and a nut (3) threadedly connected to the surface of the stud (2); The anti-detachment component (4) includes an installation cavity (41) opened inside the nut (3), an anti-detachment nut (42) is threaded to the bottom of the stud (2), a conical sleeve (43) is fixedly installed on the surface of the anti-detachment nut (42), an internal thread (44) is opened inside the conical sleeve (43), the conical sleeve (43) is threaded to the surface of the stud (2) through the internal thread (44), and the conical sleeve (43) is inserted into the installation cavity (41); The pressure-resistant assembly (5) includes a pressure relief groove (51) formed on the surface of the stud (2). The pressure relief groove (51) has three grooves formed radially around the stud (2) and extends to the top of the stud (2) near the bolt head (1) connection.

2. The bolt fastener according to claim 1, characterized in that: The inner wall of the mounting cavity (41) is provided with a pressing surface (6), the conical sleeve (43) extends around to the connection with the anti-loosening nut (42) and is provided with an open deformation groove (7), and the outer side of the top of the conical sleeve (43) is provided with a contact surface (8).

3. The bolt fastener according to claim 2, characterized in that: The pressing surface (6) and the contact surface (8) are designed with corresponding bevels.

4. The bolt fastener according to claim 1, characterized in that: The tapered sleeve (43) is fitted with a gasket (9) on its outside, and the gasket (9) is in contact with the bottom of the nut (3).

5. The bolt fastener according to claim 1, characterized in that: A spring (10) is fitted on the surface of the stud (2), and the spring (10) is located between the bolt head (1) and the nut (3).

6. The bolt fastener according to claim 1, characterized in that: The stud (2) is forged from alloy steel and its surface is nitrided.

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