Primary and secondary nut compression type anti-loose joint

Abstract

The utility model relates to an anti-loose joint, in particular to a primary and secondary nut compression type anti-loose joint. A primary and secondary nut pressing type anti-loosening connector comprises a tubular connector body with two through ends, an outer limiting ring is circumferentially arranged in the middle of the outer wall of the connector body, a threaded connecting hole is formed in the connector body in a through mode, and an inner limiting ring is circumferentially arranged in the middle of the threaded connecting hole. The two ends of the inner wall of the connector body are each provided with a notch in the circumferential direction, the two ends of the threaded connecting hole are symmetrically and sequentially provided with a sealing ring, a gasket and an opening ring from inside to outside along the inner limiting ring, and the two sealing rings are embedded into the corresponding notches respectively. The utility model aims to provide a primary and secondary nut compression type anti-loose joint which is simple in structure, convenient to install and good in anti-loose effect.

Description

Technical Field

[0001] The utility model relates to an anti-loosening joint, in particular to a parent-child nut compression type anti-loosening joint. Background Art

[0002] In the prior art, most of the anti-loosening fastening devices for high-speed railway vehicles now originate from foreign pipeline connection methods. In actual use, the joints are often loosened due to external forces such as vibration and impact, causing safety hazards. Although there are some anti-loosening designs on the market, their application is subject to certain restrictions due to complex structures, high costs or unsatisfactory anti-loosening effects. Therefore, it is an urgent need in this field to develop a new type of joint with simple structure, low cost and good anti-loosening effect. Common joint connection methods such as threaded connection and welding usually use locking plates, pins, nylon embedding, deformed threads, chemical coating and other methods, which delay the time for the joint fasteners to loosen by themselves to a certain extent, but do not fundamentally solve the problem. Especially in the field of high-speed railway train technology, once the joint becomes loose and falls off, it will cause gas or liquid leakage, which greatly increases the cost of maintenance. However, most of the anti-loosening joints on the market are composed of a single device or two devices, and the anti-loosening property is not obvious. Utility Model Content

[0003] In view of this, the utility model provides a mother-and-child nut compression type anti-loosening joint. The purpose is to provide a mother-and-child nut compression type anti-loosening joint with a simple structure, convenient installation and good anti-loosening effect.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A parent-child nut compression type anti-loosening joint, comprising a joint body with two ends penetrating in a tubular shape, an outer limiting ring is circumferentially arranged in the middle of the outer wall of the joint body, a threaded connection hole is penetrating in the interior of the joint body, an inner limiting ring is circumferentially arranged in the middle of the threaded connection hole, both ends of the inner wall of the joint body are circumferentially opened with notches, and both ends of the threaded connection hole are symmetrically arranged along the inner limiting ring from the inside to the outside in sequence with a sealing ring, a gasket and an open ring, and two sealing rings are respectively embedded in the corresponding notches;

[0006] The two ends of the joint body are symmetrically provided with a clamping mechanism, and the clamping mechanism includes a secondary nut and a main nut located at one end of the outer wall of the joint body and away from the outer limiting ring, which are threadedly connected in sequence from the inside to the outside. An annular groove is circumferentially provided on the inner wall of the secondary nut on the side away from the outer limiting ring, an annular protrusion is provided on the side of the main nut adjacent to the secondary nut corresponding to the annular groove, and a locking ring is circumferentially provided on the side of the main nut away from the secondary nut.

[0007] Preferably, the outer wall of the open ring is arranged in a slope shape with a higher inner side and a lower outer side, and the inner wall of the locking ring is arranged in a slope shape with a higher inner side and a lower outer side corresponding to the open ring.

[0008] Preferably, the inner walls of the main nut and the auxiliary nut are both provided with internal threads, and the outer wall of the joint body is provided with external threads corresponding to the main nut and the auxiliary nut.

[0009] Preferably, the open ring has an elastic margin in the radial direction and the circumferential direction.

[0010] Preferably, the inner diameters of the threaded connection hole, the sealing ring, the gasket, the open ring and the locking ring are all equal.

[0011] Preferably, the sealing ring and the gasket are both made of aviation-grade rubber material.

[0012] Preferably, the joint body, the main nut and the secondary nut are all made of 304 stainless steel.

[0013] The beneficial effects of the utility model are:

[0014] 1. The utility model comprises a joint body which is arranged in a tubular shape and is penetrated at both ends, an outer limiting ring is circumferentially arranged at the middle part of the outer wall of the joint body, a threaded connection hole is arranged inside the joint body, the threaded connection hole is used for threaded compression docking with the connection object, an inner limiting ring is circumferentially arranged at the middle part of the threaded connection hole, notches are circumferentially opened at both ends of the inner wall of the joint body, the notches are arranged lower inside and higher outside, and sealing rings, gaskets and open rings are symmetrically arranged at both ends of the threaded connection hole from inside to outside along the inner limiting ring, and the two sealing rings are respectively embedded in the corresponding notches. This arrangement is easy to install by assembling multiple simple structures such as the joint body, the outer limiting ring, the inner limiting ring, the sealing ring, the gasket and the open ring, while effectively increasing its anti-slip performance, sealing performance and elasticity. The multiple structures complement each other, can effectively maintain the overall stability of the anti-loosening joint, and ensure that it is not affected by the damage of one structure. The overall stability of the loose joint makes the anti-loosening joint safer during use; a clamping mechanism is symmetrically arranged at the two ends of the joint body, and the clamping mechanism includes a secondary nut and a main nut which are located at one end of the outer wall of the joint body and are threadedly connected from the inside to the outside away from the outer limit ring, an annular groove is circumferentially provided on the inner wall of the secondary nut on the side away from the outer limit ring, an annular protrusion is arranged corresponding to the annular groove on the side of the main nut adjacent to the secondary nut, and a locking ring is arranged circumferentially on the side of the main nut away from the secondary nut. This arrangement can effectively clamp the entire anti-loosening joint through the matching connection between the annular groove and the annular protrusion, the threaded connection between the main nut and the secondary nut and the outer wall of the joint body respectively, and the limiting locking of the main nut and the end of the joint body by the locking ring, so as to prevent the anti-loosening joint from loosening under the action of external force, thereby greatly improving the anti-loosening performance and safety of use of the anti-loosening joint.

[0015] 2. The outer wall of the open ring of the utility model is arranged in a slope shape with a high inside and a low outside, and the inner wall of the locking ring is arranged in a slope shape with a high inside and a low outside corresponding to the open ring. This arrangement increases the contact area between the contact surface of the open ring and the locking ring, thereby enhancing the relative friction between the two, which is beneficial to increase the anti-loosening property of the entire anti-loosening joint.

[0016] 3. In the utility model, internal threads are arranged on the inner walls of the main nut and the auxiliary nut, and external threads are arranged on the outer wall of the joint body corresponding to the main nut and the auxiliary nut. This arrangement enables the main nut and the auxiliary nut to be threadedly connected to the outer wall of the joint body respectively, thereby ensuring the convenience of installation and maintenance of the entire anti-loosening joint.

[0017] 4. The open ring of the utility model has elastic margins along its radial and circumferential directions. This arrangement ensures that there is always installation elastic force between the entire anti-loosening joint and the connection object, and at the same time, a clamping force can be generated on the connection object under the action of external force. It also prevents slippage between the anti-loosening joint and the connection object to a certain extent because the main part of the anti-loosening joint is made of metal material.

[0018] 5. The inner diameters of the threaded connection hole, sealing ring, gasket, open ring and locking ring of the utility model are all equal. This arrangement ensures that the anti-loosening joint and the connection object can be tightly connected, and effectively reduces the possibility of slipping between the anti-loosening joint and the connection object due to external force.

[0019] 6. The sealing ring and gasket of the utility model are both made of aviation-grade rubber material. The rubber material is elastic and has a longer service life, which is beneficial to increasing the service life of the anti-loosening joint. It has a wide range of applications and can be widely used in various high-speed railway trains that require high-reliability fastening connections.

[0020] 7. The joint body, main nut and auxiliary nut of the utility model are all made of 304 stainless steel, which increases the strength of the anti-loosening joint and also reduces the possibility of the anti-loosening joint falling off due to rust during use to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a front view and expanded cross-sectional structural schematic diagram of the utility model;

[0022] Figure 2 It is a front view cross-sectional structural schematic diagram of the utility model;

[0023] Figure 3 It is a side structural schematic diagram of the utility model.

[0024] Figure numerals: 1: joint body, 2: outer limiting ring, 3: threaded connection hole, 4: inner limiting ring, 5: notch, 6: sealing ring, 7: gasket, 8: open ring, 9: clamping mechanism, 10: secondary nut, 11: main nut, 12: annular groove, 13: annular protrusion, 14: locking ring. DETAILED DESCRIPTION

[0025] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] 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.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", and "set" 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.

[0028] like Figure 1 , Figure 2 and Figure 3As shown, it comprises a joint body 1 with two ends penetrating in a tubular shape, an outer limiting ring 2 is circumferentially arranged in the middle of the outer wall of the joint body 1, a threaded connection hole 3 is circumferentially arranged inside the joint body 1, the threaded connection hole 3 is used for threaded compression docking with a connection object, an inner limiting ring 4 is circumferentially arranged in the middle of the threaded connection hole 3, both ends of the inner wall of the joint body 1 are circumferentially provided with notches 5, the notches 5 are arranged with the inner lower and the outer higher, and the two ends of the threaded connection hole 3 are symmetrically provided with sealing rings 6, gaskets 7 and open rings 8 from the inside to the outside along the inner limiting ring 4, and the two sealing rings 6 are respectively embedded in the corresponding notches 5. This arrangement is through the assembly of multiple simple structures such as the joint body 1, the outer limiting ring 2, the inner limiting ring 4, the sealing ring 6, the gasket 7 and the open ring 8, which is convenient for installation and effectively increases its anti-slip property, sealing and elasticity. The multiple structures complement each other, can effectively maintain the overall stability of the anti-loosening joint, and ensure that the overall stability of the anti-loosening joint is not affected by the damage of one structure. The anti-loosening joint is safer during use; the two ends of the joint body 1 are symmetrically provided with a clamping mechanism 9, and the clamping mechanism 9 includes a secondary nut 10 and a main nut 11 that are located at one end of the outer wall of the joint body 1 and are away from the outer limit ring 2 and are threadedly connected from the inside to the outside, and an annular groove 12 is circumferentially provided on the inner wall of the side of the secondary nut 10 away from the outer limit ring 2, and an annular protrusion 13 is provided on the side of the main nut 11 adjacent to the secondary nut 10 corresponding to the annular groove 12, and a locking ring 14 is circumferentially provided on the side of the main nut 11 away from the secondary nut 10. This arrangement can effectively clamp the entire anti-loosening joint to prevent the anti-loosening joint from loosening under the action of external force, thereby greatly improving the anti-loosening performance and safety of use of the anti-loosening joint.

[0029] like Figure 1 and 2 As shown, the outer wall of the open ring 8 is arranged in a slope shape with a high inside and a low outside, and the inner wall of the locking ring 14 is arranged in a slope shape with a high inside and a low outside corresponding to the open ring 8. This arrangement increases the contact area between the contact surfaces of the open ring 8 and the locking ring 14, thereby enhancing the relative friction between the two, which is beneficial to increase the anti-loosening property of the entire anti-loosening joint.

[0030] like Figure 1 , Figure 2 and Figure 3 As shown, internal threads are arranged on the inner walls of the main nut 11 and the secondary nut 10, and external threads are arranged on the outer wall of the joint body 1 corresponding to the main nut 11 and the secondary nut 10. This arrangement enables the main nut 11 and the secondary nut 10 to be threadedly connected to the outer wall of the joint body 1 respectively, thereby ensuring the convenience of installation and maintenance of the entire anti-loosening joint.

[0031] like Figure 1 , Figure 2 and Figure 3 As shown, the open ring 8 has an elastic margin in the radial and circumferential directions. This arrangement ensures that there is always an installation elastic force between the entire anti-loosening joint and the connection object, and at the same time, a clamping force can be generated on the connection object under the action of an external force. It also prevents slippage between the anti-loosening joint and the connection object to a certain extent because the main part of the anti-loosening joint is made of metal material.

[0032] like Figure 1 , Figure 2 and Figure 3 As shown, the inner diameters of the threaded connection hole 3, the sealing ring 6, the gasket 7, the open ring 8 and the locking ring 14 are all equal. This arrangement ensures that the anti-loosening joint and the connection object can be tightly connected, and effectively reduces the possibility of slipping between the anti-loosening joint and the connection object due to external force.

[0033] like Figure 1 and Figure 2 As shown, the sealing ring 6 and the gasket 7 are both made of aviation-grade rubber material. The rubber material is elastic and has a longer service life, which is beneficial to increasing the service life of the anti-loosening joint. It has a wide range of applications and can be widely used in various high-speed railway trains that require high-reliability fastening connections.

[0034] like Figure 1 , Figure 2 and Figure 3 As shown, the joint body 1, the main nut 11 and the auxiliary nut 10 are all made of 304 stainless steel, which increases the strength of the anti-loosening joint and also reduces the possibility of the anti-loosening joint falling off due to rust during use to a certain extent.

[0035] The specific operating principle is:

[0036] When using this anti-loosening joint, the user first needs to select an anti-loosening joint of appropriate size according to the size of the actual connection object, install the secondary nut on the outer wall of the joint body, and then install the sealing ring, gasket and open ring in sequence from the inside to the outside at the notches at both ends of the joint body. After the installation is completed, the annular protrusions are connected to the annular grooves through threaded connections on the outer walls of both ends of the joint body, and the two main nuts are respectively threadedly connected to the outer walls of both ends of the joint body, and the corresponding connected secondary nuts are limited by the main nuts, and then the corresponding main nuts are limited by the locking ring. At this point, the entire anti-loosening joint is installed, tightened and limited, and then the connecting hole of the anti-loosening joint can be threadedly connected to the outer wall of the connection object.

[0037] The components provided by the utility model are only used for the technical solution according to the structural characteristics of the product. The product will be adjusted and modified after purchase to make it more matching and conforming to the technical solution of the utility model. It is a technical solution for the best application of the technical solution. The model of the product can be replaced and modified according to the required technical parameters, which is well known to the technical personnel in this field. Therefore, the technical personnel in this field can clearly obtain the corresponding use effect through the technical solution provided by the utility model.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A nut-and-nut compression anti-loosening joint, characterized in that: It comprises a joint body with two ends penetrating in a tubular shape, an outer limiting ring is circumferentially arranged in the middle of the outer wall of the joint body, a threaded connection hole is penetrating in the interior of the joint body, an inner limiting ring is circumferentially arranged in the middle of the threaded connection hole, both ends of the inner wall of the joint body are circumferentially opened with notches, and both ends of the threaded connection hole are symmetrically arranged along the inner limiting ring from the inside to the outside in sequence with a sealing ring, a gasket and an open ring, and the two sealing rings are respectively embedded in the corresponding notches; The two ends of the joint body are symmetrically provided with a clamping mechanism, and the clamping mechanism includes a secondary nut and a main nut located at one end of the outer wall of the joint body and away from the outer limiting ring, which are threadedly connected in sequence from the inside to the outside. An annular groove is circumferentially provided on the inner wall of the secondary nut on the side away from the outer limiting ring, an annular protrusion is provided on the side of the main nut adjacent to the secondary nut corresponding to the annular groove, and a locking ring is circumferentially provided on the side of the main nut away from the secondary nut.

2. The parent-child nut compression anti-loosening joint according to claim 1, characterized in that: The outer wall of the open ring is arranged in a slope shape with a higher inner side and a lower outer side, and the inner wall of the locking ring is arranged in a slope shape with a higher inner side and a lower outer side corresponding to the open ring.

3. The parent-child nut compression anti-loosening joint according to claim 1, characterized in that: Internal threads are arranged on the inner walls of the main nut and the auxiliary nut, and external threads are arranged on the outer wall of the joint body corresponding to the main nut and the auxiliary nut.

4. The parent-child nut compression anti-loosening joint according to claim 1, characterized in that: The open ring has an elastic margin in the circumferential direction along its radial direction.

5. The parent-child nut compression anti-loosening joint according to claim 1, characterized in that: The inner diameters of the threaded connection hole, the sealing ring, the gasket, the open ring and the locking ring are all equal.

6. The parent-child nut compression anti-loosening joint according to claim 1, characterized in that: The sealing ring and the gasket are both made of aviation-grade rubber material.

7. The parent-child nut compression anti-loosening joint according to claim 1, characterized in that: The joint body, the main nut and the auxiliary nut are all made of 304 stainless steel.

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