Jacket nut joint

Abstract

The utility model relates to the technical field of joint connection, in particular to a jacket nut joint. Comprising a male joint, a female joint and an outer sleeve nut, the male joint axially abuts against the female joint, the outer sleeve nut sleeves the abutting position of the male joint and the female joint and is in threaded connection with the female joint, and a conical slope is arranged on the inner side wall of the front end of one side, close to the female joint, of the outer sleeve nut. Meanwhile, the pin is arranged at the connecting position of the male connector and the female connector, the outer sleeve nut is limited on the male connector, position deviation of the outer sleeve nut during use is prevented, in addition, due to the cup opening design of the female connector and the limiting protrusion of the male connector, installation convenience and efficiency can be improved during assembly, and practicability and reliability of the connector are integrally improved.

Description

Technical Field

[0001] This utility model relates to the field of connector connection technology, and in particular to an outer sleeve nut connector. Background Technology

[0002] In various mechanical equipment, piping systems, and numerous engineering structures, reliable connections between components are a key element in ensuring the normal operation of the entire system. As a crucial component for connecting parts, the performance of joints directly affects the stability, safety, and service life of the equipment. Especially in environments with complex conditions such as vibration, impact, high temperature, or high pressure, joints must not only ensure a tight connection between components but also possess anti-loosening capabilities to prevent problems caused by loose connections.

[0003] In existing outer nut technology, threaded connections are typically used to achieve connection and prevent loosening between components. This involves axially abutting a pair of connectors, then screwing the outer nut onto each connector to fix their relative positions. Threadlocker is then applied to the threads, using its cured adhesiveness to increase friction and prevent loosening. However, these existing connection and anti-loosening technologies have limitations. Under long-term vibration or alternating loads, threads are prone to wear and loosening, leading to connection failure. While applying threadlocker can improve the anti-loosening effect to some extent, removing the threadlocker is difficult during disassembly and maintenance, the assembly process is complex and cumbersome, and the performance of the threadlocker degrades over time and with environmental changes. Therefore, a new outer nut connector is urgently needed to solve these problems. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides an outer sleeve nut connector, which solves the technical problems that the connection joint is prone to loosening under long-term vibration or alternating loads, and the assembly and connection process is complicated and cumbersome.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] A coupling with an outer nut includes: a male connector, a female connector, and an outer nut. The male connector and the female connector are axially abutted together. The outer nut is sleeved and installed at the axial abutment connection between the male connector and the female connector. The outer nut is threadedly connected to the female connector. A tapered inclined surface is provided on the inner side wall of the outer nut near the front end of the female connector. When the outer nut is threadedly connected to the female connector, the tapered inclined surface undergoes elastic deformation, causing the outer nut to engage with the outer side of the female connector. A pin is provided at the connection between the male connector and the female connector, and the pin is used to limit the outer nut on the male connector.

[0007] Based on the above structure, the principle of the aforementioned outer nut connector is as follows: First, the outer nut is fitted onto the male connector, ensuring that the slope direction of the tapered bevel at the front end of the outer nut is correct. Next, the female connector is axially abutted against the male connector near the outer nut. Since the outer nut and female connector are threadedly connected, by tightening the outer nut or rotating the female connector, the threads of the outer nut and female connector engage, completing the connection between the male and female connectors. Then, because the inner wall of the outer nut near the female connector has a tapered bevel, during the connection process, the tapered bevel is compressed, causing the front end of the outer nut to slightly expand and undergo elastic deformation. After the front end of the outer nut deforms, in addition to lateral contact, the threads of the outer nut and female connector will also generate additional radial contact under the action of the slope deformation. The extrusion pressure increases the radial contact pressure between the male and female connector threads, creating a "meshing" connection. When the male and female connectors are subjected to external forces such as vibration and impact, the meshing increases the friction and mechanical meshing force between the outer nut and the female connector. The external force needs to overcome greater resistance to make the outer nut rotate. At the same time, the tightly meshed structure formed by deformation prevents relative movement between the outer nut and the female connector, effectively preventing the threaded connection from loosening. Finally, the pressing device presses the pin onto the connection between the male connector and the outer nut, positioning the outer nut on the male connector. This effectively prevents unnecessary rotation or axial displacement of the outer nut during use, further avoiding the problem of the outer nut loosening due to external forces such as vibration and impact, and improving the reliability and stability of the connection.

[0008] Furthermore, in one type of outer nut connector of this application, the inclination angle of the tapered bevel is 1° to 3°. As a preferred embodiment of this application, the tapered bevel of the outer nut connector with an angle of 1° to 3° allows the front end of the outer nut to undergo elastic deformation under torque, forming a tight engagement with the thread of the female connector. When the inclination angle of the tapered bevel is too small, it is difficult to generate sufficient deformation to form an effective engagement; when the inclination angle of the tapered bevel is too large, it may cause excessive deformation of the outer nut, damage to the structure of the outer nut and the female connector, and unstable engagement force. During installation, the tapered bevel at this angle makes it easier for the thread of the female connector to align with the thread of the outer nut, facilitating the smooth screwing of the outer nut in the initial tightening stage, thereby improving the convenience and success rate of installation.

[0009] Furthermore, in one type of outer sleeve nut connector of this application, the female connector has a cup-shaped opening at the end near the male connector, which is used to accommodate the end of the male connector near the female connector. As a preferred embodiment of this application, the cup-shaped opening in this type of outer sleeve nut connector provides a positioning reference for the connection between the male and female connectors. During assembly, the end of the male connector near the female connector can be quickly and accurately aligned with the cup-shaped opening and inserted, which not only reduces the difficulty of assembling the male and female connectors but also reduces the skill requirements for the installation operators, thereby improving assembly efficiency.

[0010] Furthermore, in one type of outer sleeve nut connector of this application, a limiting protrusion is provided on the outer wall of the male connector, and the limiting protrusion extends radially along the male connector. As a preferred embodiment of this application, in the axial docking process of the male and female connectors, when the end of the female connector near the male connector abuts against the side of the limiting protrusion near the female connector, the limiting protrusion limits the female connector, preventing the female connector from continuing to move closer to the male connector, preventing the male connector from being over-inserted into the cup mouth during installation, and allowing the installation operator to quickly align the male and female connectors based on the position of the limiting protrusion, thereby reducing assembly difficulty and improving assembly efficiency.

[0011] Furthermore, in this application, an outer nut connector is provided, wherein the outer nut has a mounting hole for installing a pin. As a preferred embodiment of this application, in this outer nut connector, after the male and female connectors are axially connected and the outer nut and female connector are threaded together, a special pressing tool is used to insert a pin into the mounting hole and cold-extrude the pin, causing the pin to fill the gap between the male connector and the outer nut, forming a mechanical interlock, thereby positioning the outer nut on the male connector. During this process, the pin is subjected to extrusion force and enters the gap between the male connector and the outer nut. As the extrusion force increases, the pin begins to undergo plastic deformation, its diameter expands, and the female and male connectors also undergo certain plastic deformation due to the deformation of the pin. This deformation, combined with the pin's deformation, forms an interference fit. The friction and mechanical interlocking force generated by this interference fit tightly connect the outer nut and the male connector, achieving a permanent connection.

[0012] Furthermore, in one type of outer sleeve nut connector of this application, a notch is provided on the outer wall of the female connector, and the notch is arranged along the circumference of the female connector. As a preferred embodiment of this application, when the female connector is machined, the notch in the outer sleeve nut connector provides sufficient space for the tool after the cutting tool has finished cutting the female connector, allowing the tool to be smoothly withdrawn from the machined surface of the female connector, avoiding the tool scratching the machined surface of the female connector, which would affect the machining accuracy and surface quality; and the notch also helps to alleviate the stress generated when the tool is withdrawn during the machining of the female connector, avoiding stress concentration on the surface of the female connector, preventing cracks from appearing in the female connector during subsequent use, and affecting the service life and reliability of the product.

[0013] Furthermore, in one type of outer nut connector of this application, the cross-sectional shape of the missing portion is a right-angled trapezoid. As a preferred embodiment of this application, in the subsequent operation of the female connector, especially under alternating loads, stress concentration is prone to occur at the missing portion. The right-angled trapezoidal design can make the stress distribution relatively more uniform, guide the stress flow smoothly, reduce the degree of stress concentration in local areas, thereby improving fatigue strength and service life.

[0014] As can be seen from the above technical solution, this utility model has the following beneficial effects:

[0015] This utility model provides an outer nut connector. By providing a tapered bevel on the inner wall of the outer nut near the female connector, it undergoes elastic deformation and engages with the outer surface of the female connector during threaded connection, thereby enhancing the stability of the connection. A pin is provided at the connection between the male and female connectors to limit the outer nut to the male connector, preventing the relative position of the outer nut from shifting during use. At the same time, the cup-shaped design of the female connector and the limiting protrusion of the male connector improve the convenience and efficiency of installation during assembly. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of an outer sleeve nut connector according to an embodiment of this application;

[0017] Figure 2 This is a top view of an outer nut connector according to an embodiment of this application;

[0018] Figure 3 This is a cross-sectional view of an outer nut connector according to an embodiment of this application.

[0019] In the diagram: 1-male connector; 11-limiting protrusion; 2-female connector; 20-notch; 3-outer nut; 30-mounting hole; 4-pin; 5-cup mouth. Detailed Implementation

[0020] like Figure 1 , 3 As shown, an outer nut connector includes: a male connector 1, a female connector 2, and an outer nut 3. The male connector 1 and the female connector 2 are axially abutted together. The outer nut 3 is sleeved and installed at the axial abutment connection between the male connector 1 and the female connector 2. The outer nut 3 is threadedly connected to the female connector 2. A tapered inclined surface is provided on the inner side wall of the front end of the outer nut 3 near the female connector 2. When the outer nut 3 is threadedly connected to the female connector 2, the tapered inclined surface undergoes elastic deformation, causing the outer nut 3 to engage with the outer side of the female connector 2. A pin 4 is provided at the connection between the male connector 1 and the female connector 2. The pin 4 is used to limit the outer nut 3 on the male connector 1.

[0021] Based on the above structure, the principle of the aforementioned outer nut connector is as follows: First, the outer nut 3 is fitted onto the male connector 1, ensuring that the slope direction of the tapered bevel at the front end of the outer nut 3 is correct. Next, the female connector 2 is axially abutted against the side of the male connector 1 near the outer nut 3. Since the outer nut 3 and the female connector 2 are threadedly connected, by tightening the outer nut 3 or rotating the female connector 2, the threads of the outer nut 3 and the female connector 2 are engaged, completing the connection between the male connector 1 and the female connector 2. Then, because the inner wall of the front end of the outer nut 3 near the female connector 2 has a tapered bevel, during the connection process, the tapered bevel is compressed, causing the front end of the outer nut 3 to slightly expand and undergo elastic deformation. After the front end of the outer nut 3 deforms, in addition to lateral contact, the threads of the outer nut 3 and the female connector 2 will also generate additional radial contact under the action of the slope deformation. The extrusion pressure increases the radial contact pressure between the male connector 1 and the female connector 2 thread, creating a "meshing" connection. When the male connector 1 and female connector 2 are subjected to external forces such as vibration and impact, the meshing increases the friction and mechanical meshing force between the outer nut 3 and the female connector 2. The external force needs to overcome greater resistance to make the outer nut 3 rotate. At the same time, the tightly meshed structure formed by deformation prevents relative movement between the outer nut 3 and the female connector 2, effectively preventing the threaded connection from loosening. Finally, the pin 4 is pressed and squeezed onto the connection between the male connector 1 and the outer nut 3 by a pressing device (not shown), positioning the outer nut 3 on the male connector 1. This effectively prevents unnecessary rotation or axial displacement of the outer nut 3 during use, further avoiding the problem of the outer nut 3 loosening due to external forces such as vibration and impact, and improving the reliability and stability of the connection.

[0022] In this embodiment, the inclination angle of the tapered ramp is 1° to 3°. Under torque, a tapered ramp of 1° to 3° allows the front end of the outer nut 3 to undergo elastic deformation, forming a tight engagement with the thread of the female connector 2. When the inclination angle of the tapered ramp is too small, it is difficult to generate sufficient deformation to form an effective engagement; when the inclination angle of the tapered ramp is too large, it may cause excessive deformation of the outer nut 3, damaging the structure of the outer nut 3 and the female connector 2, and resulting in unstable engagement force. During installation, this angle of the tapered ramp makes it easier for the thread of the female connector 2 to align with the thread of the outer nut 3, facilitating smooth screwing of the outer nut 3 during the initial tightening stage, thereby improving the convenience and success rate of installation. The inclination angle of the tapered ramp is 1°.

[0023] In this embodiment, the female connector 2 has a cup-shaped opening 5 at one end near the male connector 1. The cup-shaped opening 5 is used to accommodate the end of the male connector 1 near the female connector 2. The cup-shaped opening 5 provides a positioning reference for the connection between the male connector 1 and the female connector 2. During assembly, the end of the male connector 1 near the female connector 2 can be quickly and accurately aligned with the cup-shaped opening 5 and inserted. This not only reduces the difficulty of assembling the male connector 1 and the female connector 2, but also reduces the skill requirements for the installation operators, thereby improving assembly efficiency.

[0024] In this embodiment, a limiting protrusion 11 is provided on the outer wall of the male connector 1, and the limiting protrusion 11 extends radially along the male connector 1. During the axial docking of the male connector 1 and the female connector 2, when the end of the female connector 2 near the male connector 1 abuts against the side of the limiting protrusion 11 near the female connector 2, the limiting protrusion 11 limits the female connector 2, preventing the female connector 2 from continuing to move closer to the male connector 1, preventing the male connector 1 from being over-inserted into the cup 5 during installation, and allowing the installation operator to quickly align the male connector 1 and the female connector 2 based on the position of the limiting protrusion 11, thereby reducing assembly difficulty and improving assembly efficiency. The limiting protrusion 11 is annular.

[0025] like Figure 2As shown, in this embodiment, the outer nut 3 is provided with a mounting hole 30, which is used for the installation of the pin 4. After the male connector 1 and the female connector 2 are axially connected and the outer nut 3 and the female connector 2 are threadedly connected, the pin 4 is inserted into the mounting hole 30 using a special pressing and extrusion tool (not shown), and the pin 4 is cold-extruded to fill the gap between the male connector 1 and the outer nut 3, forming a mechanical interlock, thereby positioning the outer nut 3 on the male connector 1. During this process, the pin 4 is subjected to extrusion force and enters the gap between the male connector 1 and the outer nut 3. As the extrusion force increases, the pin 4 begins to undergo plastic deformation, and its diameter expands. The female connector 2 and the male connector 1 are also affected by the deformation of the pin 4 and will also undergo a certain amount of plastic deformation. This deformation of the pin 4 complements the deformation of the pin 4 to form an interference fit. The friction and mechanical interlocking force generated by this interference fit make the outer nut 3 and the male connector 1 tightly connected together, realizing the permanent connection function.

[0026] In this embodiment, a notch 20 is provided on the outer wall of the female connector 2, and the notch 20 is arranged along the circumference of the female connector 2. When the female connector 2 is machined, after the cutting tool finishes cutting the female connector 2, the notch 20 provides sufficient space for the cutting tool to be smoothly withdrawn from the machined surface of the female connector 2, avoiding the cutting tool from scratching the machined surface of the female connector 2, which would affect the machining accuracy and surface quality. In addition, the notch 20 also helps to alleviate the stress generated when the cutting tool is withdrawn during the machining process of the female connector 2, avoiding stress concentration on the surface of the female connector 2, and preventing cracks from appearing in the female connector 2 during subsequent use, which would affect the service life and reliability of the product.

[0027] In this embodiment, the cross-sectional shape of the notch 20 is a right trapezoid. During the subsequent operation of the female connector 2, especially under alternating loads, stress concentration is prone to occur at the notch 20. The right trapezoidal design can make the stress distribution more uniform, guide the stress flow smoothly, reduce the degree of stress concentration in local areas, and thus improve the fatigue strength and service life.

[0028] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on the explanation herein, those skilled in the art can conceive of other specific embodiments of this utility model without creative effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A type of outer sleeve nut connector, characterized in that: include: The male connector (1), female connector (2), and outer nut (3) are provided. The male connector (1) and female connector (2) are axially connected. The outer nut (3) is sleeved and installed at the axial connection between the male connector (1) and female connector (2). The outer nut (3) is threaded to the female connector (2). The inner wall of the outer nut (3) near the front end of the female connector (2) is provided with a tapered slope. When the outer nut (3) is threaded to the female connector (2), the tapered slope undergoes elastic deformation, causing the outer nut (3) to engage on the outer surface of the female connector (2). A pin (4) is provided at the connection between the male connector (1) and female connector (2). The pin (4) is used to limit the outer nut (3) on the male connector (1).

2. The outer sleeve nut connector according to claim 1, characterized in that: The inclination angle of the conical slope is 1° to 3°.

3. The outer sleeve nut connector according to claim 1, characterized in that: The female connector (2) has a cup opening (5) at one end near the male connector (1), and the cup opening (5) is used to accommodate the end of the male connector (1) near the female connector (2).

4. The outer sleeve nut connector according to claim 3, characterized in that: The male connector (1) has a limiting protrusion (11) on its outer side wall, and the limiting protrusion (11) extends radially along the male connector (1).

5. A sleeve nut connector according to claim 4, characterized in that: The outer nut (3) is provided with a mounting hole (30), which is used for the installation of the pin (4).

6. The outer sleeve nut connector according to claim 1, characterized in that: The outer wall of the female connector (2) is provided with a notch (20), which is arranged along the circumference of the female connector (2).

7. A sleeve nut connector according to claim 6, characterized in that: The cross-sectional shape of the missing part (20) is a right trapezoid.

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