CN111193130A

CN111193130A - High-performance radio frequency cable leakage connector clamping structure and connector

Info

Publication number: CN111193130A
Application number: CN202010111982.7A
Authority: CN
Inventors: 董文彪; 刘永坤; 翁婕妤; 史科; 孙余良
Original assignee: Jiangsu Hengxin Technology Co Ltd
Current assignee: Jiangsu Hengxin Technology Co Ltd
Priority date: 2020-02-24
Filing date: 2020-02-24
Publication date: 2020-05-22

Abstract

The invention discloses a high-performance radio frequency cable leakage connector clamping structure and a connector. The clamping structure realizes the tightening of the clamping ring through the matching of the first extrusion surface and the second extrusion surface, thereby completing the effective electric connection with the outer copper sheet of the leakage cable, avoiding the need of outwards flanging the outer copper sheet of the leakage cable, and being simple and convenient to install. The connector can keep the integrity of the connector all the time without separating the front, middle and rear shells in the installation process, the front, middle and rear shells are screwed in sequence after the connector is integrally sleeved into a leaky cable with good wire stripping, the stable and efficient installation effect can be achieved, and the operation is simpler and more convenient.

Description

High-performance radio frequency cable leakage connector clamping structure and connector

Technical Field

The invention relates to the technology of an installation type radio frequency coaxial connector, in particular to a clamping structure of a high-performance radio frequency leaky cable connector and the connector.

Background

In the industry, the casings of radio frequency leaky cable connectors are often screwed and fixed on leaky cables through threads, one mode is to outwards turn over the outer copper sheets of the leaky cables, clamp the outer copper sheets on the end faces of the turned-over leaky cables in the pressure surfaces of the front and rear shell structures of the connectors, and fix the copper sheets by means of the screwing force of the front and rear shells to clamp and transfer electrical performance. This approach is cumbersome to install, requires that a separate rear housing be installed first, the flange be structurally located on the rear housing, and then the front housing be installed and tightened, non-integral installation. In the other prior art, the copper sheet contact part of the leaky cable is fixed by a split cable clamp tightening device, but the split cable clamp tightening device has poor fixity and is easy to slip, and the dynamic intermodulation stability of a special application environment is poor and is easy to deviate from a normal value; the split structure can not be used repeatedly, and the split structure is easy to damage and cannot be used after being pulled out after the mounting failure; in addition, the traditional installation type connector is not provided with a related waterproof protection device which is in contact with the soft surface of the sheath, and the traditional installation type connector is easy to move and rotate in use, so that the stability of installation machinery is influenced, and the traditional installation type connector is very easy to lose efficacy in a severe shaking use environment.

Disclosure of Invention

The invention aims to provide a high-performance radio frequency leaky cable connector clamping structure and a connector which are convenient to install.

The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.

According to one aspect of the invention, a clamping structure of a high-performance radio frequency cable leakage connector is provided, and the clamping structure comprises a front shell assembly, a middle shell and a clamping ring, wherein the front shell assembly is in threaded connection with the middle shell, the front shell assembly comprises a first extrusion surface, the middle shell comprises a second extrusion surface, the first extrusion surface and the second extrusion surface are oppositely arranged and incline towards the inside, the clamping ring is arranged between the first extrusion surface and the second extrusion surface, and the clamping ring is extruded to be tightened inwards when the front shell assembly and the middle shell are screwed.

In an embodiment, the clamping ring of the clamping structure includes a first ring surface and a second ring surface, the first ring surface is matched with the first extrusion surface, the second ring surface is matched with the second extrusion surface, and an opening is formed in the clamping ring.

In an embodiment, the front housing component of the clamping structure comprises a front housing and a pressing ring which are separately arranged, the pressing ring is arranged in the front housing, the pressing ring abuts against the front housing, and the first extrusion surface is arranged on the pressing ring.

In an embodiment, the front housing, the middle housing and the pressing ring of the clamping structure are made of diamagnetic brass.

In one embodiment, the clamping ring of the clamping structure is made of diamagnetic brass or diamagnetic phosphor copper, and the surface of the clamping ring is plated with silver.

According to another aspect of the invention, the high-performance radio frequency cable leakage connector comprises any one of the high-performance radio frequency cable leakage connector clamping structures and a rear end clamping structure, wherein the rear end clamping structure comprises a rear shell and a sealing assembly, the rear shell is in threaded connection with the middle outer shell, the sealing assembly comprises a sealing element and a sealing ring, the sealing element is sleeved outside the sealing ring, the outer diameter of the sealing assembly is tightly matched with the inner diameter of the middle outer shell, the tail part of the sealing element is of a split structure, the tail part of the rear shell comprises a structural inclined plane, and the structural inclined plane is in interference fit with the split structure to tighten the sealing ring.

In one embodiment, the connector further comprises a header waterproofing structure comprising a third pressing surface and a waterproof O-ring, wherein when the front and middle outer shells are screwed, the waterproof O-ring is pressed by the third pressing surface and fills a connecting gap between the front and middle outer shells.

In one embodiment, the connector further comprises a middle waterproof structure, the middle waterproof structure comprises a protruding part arranged at the front end of the sealing ring and a step surface arranged in the middle shell, the protruding part extends outwards in the radial direction, and when the rear shell and the middle shell are screwed tightly, the protruding part is tightly matched with the step surface.

In one embodiment, the waterproof O-ring and the sealing ring of the connector are made of silicon rubber.

In one embodiment, the sealing element of the connector is made of nylon PA66, and the sealing element is integrally injection molded.

The embodiment of the invention has the beneficial effects that: the clamping structure realizes the tightening of the clamping ring through the matching of the first extrusion surface and the second extrusion surface, thereby completing the effective electric connection with the outer copper sheet of the leakage cable, avoiding the need of outwards flanging the outer copper sheet of the leakage cable, and being simple and convenient to install. The connector realizes tightening of the tail sealing ring through interference fit of the structural inclined plane of the rear shell and the sealing element, and meanwhile, fixing and waterproof effects are achieved. The connector can keep the integrity of the connector all the time without separating the front, middle and rear shells in the installation process, the front, middle and rear shells are screwed in sequence after the connector is integrally sleeved into a leaky cable with good wire stripping, the stable and efficient installation effect can be achieved, and the operation is simpler and more convenient.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

The above features and advantages of the present disclosure will be better understood upon reading the detailed description of embodiments of the disclosure in conjunction with the following drawings. In the drawings, components are not necessarily drawn to scale, and components having similar relative characteristics or features may have the same or similar reference numerals.

FIG. 1 is an exploded schematic view of an embodiment of the connector of the present invention;

FIG. 2 is a schematic axial cross-sectional view of an embodiment of the connector of the present invention;

FIG. 3 is an axial cross-sectional view of the clamping arrangement of the present invention;

fig. 4 is a schematic view of the assembly of the seal 1 and the seal ring 2 of the present invention;

fig. 5 is a schematic axial cross-section of a seal 1 and a seal ring 2 according to the invention;

FIG. 6 is a schematic view of the assembly of the seal assembly of the present invention with the middle housing 3;

FIG. 7 is a schematic axial cross-sectional view of the seal assembly of the present invention with the outer housing 3;

FIG. 8 is a schematic view of the thread tightening of the rear housing 4 and the middle housing 3 according to the present invention;

FIG. 9 is a schematic axial cross-sectional view of the rear housing 4 and the middle housing 3 of the present invention;

FIG. 10 is a side view of the snap ring 6 of the present invention;

FIG. 11 is a cross-sectional view of a snap ring 6 of the present invention;

wherein: 1-a seal; 2-sealing ring; 3-middle outer shell; 31-a second extrusion face; 33-external threads; 4-rear housing; 44-internal threads; 5-waterproof O-shaped ring; 6-a snap ring; 61-a first annulus; 62-contact surface; 63-a third annulus; 7-pressing a ring; 71-a first pressing surface; 8-a front housing; 81-structural plane; 82-a limiting surface; 83-third pressing surface.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments. It is noted that the aspects described below in connection with the figures and the specific embodiments are only exemplary and should not be construed as imposing any limitation on the scope of the present invention.

As shown in fig. 1 to 11, the invention discloses a high-performance radio frequency leaky cable clamping structure and a connector, wherein the clamping structure is composed of a front shell 8, a pressing ring 7, a clamping ring 6 and a middle shell 3 as shown in fig. 3. 8 inner structure designs of preceding shell cavity, clamping ring 7 sets up inside preceding shell 8, clamping ring 7 includes first extrusion face 71, the inside second extrusion face 31 that is provided with of well shell 3, first extrusion face 71 and second extrusion face 31 are relative and all to inside direction slope, form effective compression space through inside clamping ring 7 and well shell 3, place open type snap ring 6 in this compressible space, the bore is reduced after snap ring 6 receives compression ring 7 and well shell 3 compression, thereby 6 inner contact face 62 of clamping ring tighten up and be fixed in on the outer copper sheet of leaky cable, can effectively transmit the electrical property.

It should be noted that the front housing 8 and the press ring 7 may be separately and separately provided to form the front housing assembly, or may be integrally formed, that is, the first pressing surface 71 may be directly provided in the front housing 8. In this embodiment, the front housing 8 has a general structure, and the pressing ring 7 is separately provided, so that the front housings of different models can be directly applied as required. When screwing up preceding shell 8 and well shell 3, structural plane 81 leans on with the preceding terminal surface of clamping ring 7 to the realization is to the extrusion of snap ring 6. In this embodiment, the interface specification of the front housing 8 is 7/16 type female head structure. The front shell 8 can change the interface form according to the requirement, for example, the front shell 8 can be switched to complete the switching of the male or female interfaces of different types, such as 7/16 type, N type, 4.3-10 type, LN type, etc., so as to meet the requirement of different interface forms in the market.

Preferably, as shown in fig. 11, the snap ring 6 includes a first ring surface 61 matching the first pressing surface 71 and a second ring surface 63 matching the second pressing surface 31, so that the pressing force can be better transmitted. Furthermore, for better electrical connection, the contact surface 62 of the snap ring 6 projects inwardly.

In the aspect of materials, the front shell 8, the middle shell 3 and the pressure ring 7 are made of diamagnetic brass. The brass has better signal transmission performance. The diamagnetic brass has small magnetic conductivity, and the third-order intermodulation performance of the radio frequency connector can be improved. In a possible embodiment, the front casing 8, the middle casing 3 and the pressure ring 7 are plated with red copper, silver and ternary alloys comprising copper, tin and zinc from inside to outside. The front shell 8, the middle shell 3 and the pressure ring 7 are plated, so that the surface finish of the body can be increased, and the third-order intermodulation performance of the radio frequency connector is improved.

The material of the snap ring 6 can be diamagnetic brass or diamagnetic phosphor copper. The brass is softer and is easy to turn, the unit price ratio of the brass is lower, and the cost is reduced; the elasticity of the phosphor copper is good, the plugging force is relatively uniform, and the service life is long. The diamagnetic brass or diamagnetic phosphor copper has small magnetic conductivity, and can improve the third-order intermodulation performance of the radio frequency connector.

Furthermore, the surface of the snap ring 6 may be plated with silver. The silver plating on the surface of the snap ring 6 can improve the smoothness of the surface of the snap ring 6, enhance the transmission of signals, improve the corrosion resistance, the abrasion resistance and the hardness, provide special surface properties of light, electricity, magnetism, heat and the like, and further improve the three-order intermodulation performance of the radio frequency connector.

The traditional cable leakage connector does not usually design a shell waterproof structure because the construction process that a daub tape is wound in the follow-up process in the construction is considered. The waterproof function can not be realized under the condition that the connector is not protected by the adhesive tape, and the water inlet problem is obvious after the adhesive tape is aged and cracked. Therefore, in order to realize the waterproof performance of the connector, the waterproof O-shaped ring 5 is arranged between the screwing thread gaps of the outer shell 3 and the front outer shell 8 in the middle part, and when the front outer shell and the rear outer shell are screwed, the third pressing surface 83 presses the waterproof O-shaped ring 5 to deform in the reduced gap, so that the redundant gap is filled to achieve the waterproof effect on the connecting part. Preferably, the waterproof O-shaped ring is made of silicon rubber, and the sealing ring made of the silicon rubber can improve the sealing performance of the radio frequency connection and improve the waterproof performance of the radio frequency connection.

The tail end waterproof clamping structure consists of a middle shell 3, a rear shell 4 and a sealing assembly, as shown in fig. 4 and 5, the sealing assembly is formed by preassembling a sealing ring 2 and a sealing element 1, and a sheet-opening structure is arranged at the position 1-5 of the tail end of the sealing element 1. The sealing element 1 and the sealing ring 2 are respectively placed in a loose fit mode through a gap between the surface 1-1 and the surface 2-1, so that the surface 2-2 of the sealing ring is in contact with the surface 1-2 of the sealing element, and a waterproof assembly is formed.

In this embodiment, the sealing ring 1 is made of a silicone rubber material with a soft texture and a good waterproof effect; the sealing element 2 is made of nylon PA66 material with good ductility and moderate hardness and is integrally injection-molded, and the nylon PA66 material is high in mechanical strength, good in toughness and high in tensile strength and compressive strength. The specific tensile strength is higher than that of metal, and the specific compressive strength is comparable to that of metal. Tensile strength is close to yield strength, more than doubled as compared to ABS. The absorption capacity to impact and stress vibration is strong, the impact strength is much higher than that of common plastics, and the impact strength is superior to that of acetal resin.

As shown in fig. 6 and 7, the sealing assembly is installed in the middle housing 3, and the outer circumferential surface 1-3 of the sealing assembly is closely fitted with the inner circumferential surface 3-2 of the middle housing 3. As shown in fig. 8 and 9, when the internal thread 44 of the rear housing 4 is screwed to the external thread 33 of the middle housing 3, the rear housing 4 presses the structure inclined plane 4-1 to press the sealing ring 2 inwards by the split structure of the sealing element 1 in an interference fit manner, the sealing ring 2 is pressed by the external force of the sealing element 1, and the plane 2-4 is tightened inwards on the cable sheath skin 10, so that the tail end waterproof effect can be achieved, and the continuous claw force contacting the soft surface of the cable can be formed, so that the mechanical performance is more stable and reliable.

In addition, the front end of the sealing ring 2 is provided with a convex part which extends outwards along the radial direction, the front end surface 2-3 of the convex part is matched with the step surface 3-1 in the middle outer shell 3, when the rear outer shell 4 is screwed, the end surface 2-3 is extruded to be in close contact with the step surface 3-1 in the middle outer shell 3, and the waterproof effect on the connecting part is achieved.

The rear shell 4 only plays a role in tightening the sealing element and fastening the sheath, the material can be metal or other plastic materials with higher hardness, and the surface of the brass metal material is plated with nickel or ternary nickel, so that the surface finish can be improved, the corrosion resistance and the abrasion resistance are improved, and the hardness is enhanced; selecting aluminum metal, and performing blackening treatment on the surface of the aluminum metal; the plastic can reduce the manufacturing cost.

The installation process of the present connector is briefly described as follows:

step 1, preassembling a connector header structure. The split clamping ring 6 is placed in the middle shell 3, so that the clamping ring 6 and the middle shell 3 form a pressure surface 63, the pressing ring 7 is placed on the clamping ring 6 to form a pressure surface 61, and the middle shell 3 is screwed to 1-2 threads on the front shell 8.

And 2, pre-assembling the tail part of the connector. After the sealing element 1 and the sealing ring 2 are assembled, the sealing assembly is sleeved into an inner hole of a structure of the middle shell 3, so that 2-3 surfaces of the sealing ring 2 are in surface contact with 3-1 surfaces of an inner wall structure of the middle shell 3, and 3-2 surfaces of the middle shell 3 are in clearance loose fit contact with 1-3 surfaces of the sealing element 1. And screwing 1-2 threads on the rear shell 4 and the middle shell 3.

And step 3, sleeving the front, middle and rear shells on the cable sheath integrally.

And 4, screwing the middle shell 3. Inserting the leaky cable with the sheath removed and the copper sheet exposed into the preassembled front shell 8, wherein the foaming end face of the leaky cable is in contact with the inner wall face of the front shell and limited on the limiting face 82, fixing the wrench face of the front shell 8 by using a wrench, then screwing the middle shell 3, and simultaneously stressing and tightening the clamping ring 6 by the structural face 81, the first extrusion face 71 and the second extrusion face 31 to enable the clamping ring to bulge inwards to form a contact face 62 with the copper sheet surface of the leaky cable; meanwhile, when the front shell 8 is screwed with the middle shell 3, the third extrusion surface 83 extrudes the waterproof O-shaped ring 5 to play a middle waterproof role.

And 5, screwing the rear shell 4. The contact end face 4-1 of the rear shell 4 is contacted with the splitting structure 1-5 of the sealing element 1 to generate interference fit tightening, and the sealing ring 2 is extruded to deform and tighten on a cable sheath, so that the waterproof and fixing effects of the tail end of the connector are achieved. Meanwhile, the front end surface 2-3 of the sealing ring 2 is tightly combined with the step surface 3-1 in the middle shell 3 by extrusion, so that the middle part is waterproof. The middle shell 3 and the rear shell 4 are screwed by a spanner with two or more symmetrical milling faces.

In summary, the pre-installed connector of the present invention is composed of a front half and a rear half, the front and rear parts are integrally installed on the stripped leaky cable after pre-installation, and then the middle shell and the front shell, and the middle shell and the rear shell are respectively screwed, so as to complete installation of the connector and the leaky cable. Therefore, the front, middle and rear shells can not be separated in the construction and installation process, the integrity of the connector is always kept, the waterproof, stable and efficient installation effect can be achieved, and the operation is simpler and more convenient.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. Thus, the disclosure is not intended to be limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The above description is only a preferred example of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present application should be included in the scope of the present application.

Claims

1. The utility model provides a high performance radio frequency leaks cable connector joint structure which characterized in that: including preceding shell subassembly, well shell and snap ring, preceding shell subassembly with well shell threaded connection, preceding shell subassembly includes first extrusion face, well shell includes the second extrusion face, first extrusion face and second extrusion face set up relatively and all incline towards inside, the snap ring set up in between first extrusion face and the second extrusion face, preceding shell subassembly and well shell extrude when screwing the snap ring makes it inwards tighten up.

2. The high performance rf leaky cable connector clamping structure as claimed in claim 1, wherein: the snap ring comprises a first ring surface and a second ring surface, the first ring surface is matched with the first extrusion surface, the second ring surface is matched with the second extrusion surface, and an opening is formed in the snap ring.

3. The high performance rf leaky cable connector clamping structure as claimed in claim 1, wherein: preceding shell subassembly is including preceding shell and the clamping ring that sets up alone, the clamping ring set up in inside the preceding shell, first extrusion face set up in on the clamping ring.

4. The high performance rf leaky cable connector clamping structure as claimed in claim 3, wherein: the front shell, the middle shell and the pressure ring are made of diamagnetic brass.

5. The high performance rf leaky cable connector clamping structure as claimed in claim 1, wherein: the clamping ring is made of diamagnetic brass or diamagnetic phosphor copper, and the surface of the clamping ring is plated with silver.

6. A high performance radio frequency cable leakage connector is characterized in that: the clamping structure comprises the clamping structure according to any one of claims 1 to 5, and further comprises a rear-end clamping structure, wherein the rear-end clamping structure comprises a rear shell and a sealing assembly, the rear shell is in threaded connection with the middle and outer shells, the sealing assembly comprises a sealing piece and a sealing ring, the sealing piece is sleeved outside the sealing ring, the outer diameter of the sealing assembly is in close fit with the inner diameter of the middle and outer shells, the tail of the sealing piece is of an open-piece structure, the tail of the rear shell comprises a structure inclined plane, and the structure inclined plane is in interference fit with the open-piece structure to tighten the sealing ring.

7. The high performance rf leaky cable connector as claimed in claim 6, wherein: the waterproof structure comprises a third extrusion surface arranged on the front shell component and a waterproof O-shaped ring sleeved outside the middle shell, and when the front shell component and the middle shell are screwed down, the waterproof O-shaped ring is extruded by the third extrusion surface and fills a connecting gap between the front shell component and the middle shell.

8. The high performance rf leaky cable connector as claimed in claim 7, wherein: the middle waterproof structure comprises a protruding part arranged at the front end of the sealing ring and a step surface arranged in the middle shell, the protruding part extends outwards along the radial direction, and when the rear shell is screwed up with the middle shell, the protruding part is tightly matched with the step surface.

9. The high performance rf leaky cable connector as claimed in claim 7, wherein: the waterproof O-shaped ring and the sealing ring are made of silicon rubber.

10. The high performance rf leaky cable connector as claimed in claim 6, wherein: the material of sealing member is nylon PA66, the integrative injection moulding of sealing member.