CN210182725U

CN210182725U - Cable connection composite structure of short tail type coaxial radio frequency connector

Info

Publication number: CN210182725U
Application number: CN201921254870.6U
Authority: CN
Inventors: Yaliang Dang; 党亚粮; Yunchuan Zhu; 朱云川
Original assignee: Advanced Microwave Technologies
Current assignee: Advanced Microwave Technologies
Priority date: 2019-08-05
Filing date: 2019-08-05
Publication date: 2020-03-24
Anticipated expiration: 2029-08-05

Abstract

The utility model belongs to the technical field of the connector, a cable junction composite construction of coaxial radio frequency connector of short-tail type is related to, including hollow structure's casing, penetrate coaxial cable in the casing, be used for the welding coaxial cable's metallic braid's welding cup with be used for with the welding cup presss from both sides the clamp nut who is fixed in the casing tightly, be equipped with a plurality of welding holes on the welding cup, the clamp nut with the centre gripping has an extrusion ring that is used for coming to compress tightly coaxial cable's stainless steel wire between the welding cup, the outside cover of welding cup is equipped with the reason line sleeve pipe that is used for letting the stainless steel wire lodging that is compressed tightly. The utility model discloses adopt welded fastening to the metallic braid, adopt to compress tightly fixedly to nonrust steel wire, can avoid nonrust steel wire to drop and cause the shielding layer outside to support and the problem that tensile effect reduces, prevent that the connector from further breaking off with the cable, then can keep the overlap joint between the nonrust steel wire in order to ensure its shielding effect, guarantee the radio frequency performance of product.

Description

Cable connection composite structure of short tail type coaxial radio frequency connector

Technical Field

The utility model relates to a connector technical field, in particular to cable junction composite construction of coaxial radio frequency connector of short tail type.

Background

With the development of the microwave communication industry, microwave equipment is deployed in various specific places, such as aircrafts, satellites, naval vessels, electric locomotives, communication vehicles, monitoring vehicles, vehicle-mounted communication equipment, communication base stations and the like, and has limited environmental space and possibly the capability of resisting mechanical load. In these specific situations, the installation size is often limited, and strict requirements are put on miniaturization of communication equipment, such as portability, weight reduction, and extrusion resistance.

Coaxial rf connectors, as a type of joint for communication cables, require highly reliable physical and electrical connections. Normally, communication cables are absolutely not subject to any compression, etc. The practical problem is that in some cases, the cable needs to be bent back and forth artificially, and a special connector is needed to adapt to the special cable.

The traditional radio frequency connector is connected with a cable in a compression joint type, a press-fit type and a welding type, mainly aims at matching the structure of the cable, and each connector can only select one connecting structure, which is a traditional and mature structure. The problem is that the cable required by special occasions can not be completely welded, can not be completely pressed and pressed, and the existing traditional structure can not be completely applied.

Fig. 1 shows a cable connection structure, a shielding layer of a radio frequency cable, which is commonly used in the same industry, and includes a metal braid 31, such as silver-plated copper wire, which can be welded, an aluminum foil 32, and a guide wire. However, when the guide wire is a stainless steel wire 33, it cannot be fixed by welding, and it is inconvenient to connect in a small connector. Conventionally, a welding cup 4 is welded with a solder 9, the welding cup 4 is pressed against a housing 1 with a clamp nut 2, and a stainless steel wire 33 is fixed to the clamp nut 2 with glue 10.

However, the following disadvantages exist in practical use:

1. the thermal expansion coefficients of the metal material (stainless steel wire) and the non-metal material (glue) are different, and the structure is easy to fall off under high-temperature and low-temperature impact.

2. The cable construction is actually a triple shield and in fact at the interface the shield is broken, i.e. there is no conduction between the stainless steel wire and the connector. Even with the use of conductive paste, the on-resistance is large.

3. Because the stainless steel wire in the structure is also used as a framework supporting layer and is only fixed by glue, the performance of the product is easily reduced due to the loosening of the glue under the condition of frequent bending.

4. Through field tests, the initial product performance is very good, and through bending tests, the product performance is sharply reduced until failure occurs.

Therefore, it is necessary to provide a new structure to solve the above problems.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a cable connection composite structure of a short tail type coaxial rf connector, which enables the coaxial connector to have more reliable electrical connection performance.

The utility model discloses a following technical scheme realizes above-mentioned purpose: a cable connection composite structure of a short-tail coaxial radio frequency connector comprises a shell of a hollow structure, a coaxial cable penetrating into the shell, a welding cup used for welding a metal braid layer of the coaxial cable, and a clamping nut used for clamping and fixing the welding cup in the shell, wherein a welding hole is formed in the welding cup, an extrusion ring used for compressing a stainless steel wire of the coaxial cable is clamped between the clamping nut and the welding cup, and a wire arranging sleeve used for enabling the compressed stainless steel wire to fall down is sleeved on the outer side of the welding cup.

Specifically, an inner conical surface for enabling the extrusion ring and the shell to keep coaxial is arranged on the inward side of the clamping nut.

Specifically, the extrusion ring is integrally formed on the welding cup, and a plurality of threading holes uniformly distributed around the axis of the welding cup are further formed in the welding cup.

Specifically, the inner conductor of the coaxial cable is connected with the central needle.

Specifically, the outside of the shell is provided with a threaded sleeve.

Adopt above-mentioned technical scheme, the utility model discloses technical scheme's beneficial effect is:

the utility model discloses adopt welded fastening to the metallic braid, adopt to compress tightly fixedly to nonrust steel wire, can avoid nonrust steel wire to drop and cause the shielding layer outside to support and the problem that tensile effect reduces, prevent that the connector from further breaking off with the cable, then can keep the overlap joint between the nonrust steel wire in order to ensure its shielding effect, guarantee the radio frequency performance of product.

Drawings

FIG. 1 is a cross-sectional view of a cable connection configuration of a prior art coaxial RF connector;

fig. 2 is a cross-sectional view of a cable connection composite structure of the short-tail type coaxial radio frequency connector of embodiment 1;

FIG. 3 is a diagram showing an assembled relationship of the coaxial cable, the soldering cup, the pressing ring and the wire arranging sleeve in accordance with embodiment 1;

FIG. 4 is a perspective view of a weld cup of example 1;

fig. 5 is a cross-sectional view of a cable connection composite structure of the short-tail type coaxial radio frequency connector according to embodiment 2;

FIG. 6 is a drawing showing the assembly relationship of the coaxial cable, the soldering cup, the pressing ring and the wire arranging sleeve in accordance with example 2;

FIG. 7 is a perspective view of a weld cup of example 2.

The figures in the drawings represent:

1-a shell;

2-clamping nut, 21-inner conical surface;

3-coaxial cable, 31-metal braid, 32-aluminum foil, 33-stainless steel wire, 34-inner conductor;

4-welding cup, 4' -welding cup, 41-welding hole and 42-threading hole;

5-extruding a ring;

6-wire arranging sleeve;

7-a central needle;

8-thread sleeve;

9-soldering tin;

10-glue.

Detailed Description

The present invention will be described in further detail with reference to specific examples.

Example 1:

as shown in fig. 2 to 4, a cable connection composite structure of a short-tail type coaxial rf connector includes a hollow housing 1, a coaxial cable 3 penetrating into the housing 1, a welding cup 4 for welding a metal braid 31 of the coaxial cable 3, and a clamping nut 2 for clamping and fixing the welding cup 5 in the housing 1, wherein a plurality of welding holes 41 are formed in the welding cup 4, a pressing ring 5 for pressing a stainless steel wire 33 of the coaxial cable 3 is clamped between the clamping nut 2 and the welding cup 4, and a wire arranging sleeve 6 for allowing the pressed stainless steel wire 33 to fall is sleeved outside the welding cup 4. During assembly, the clamping nut 2, the extrusion ring 5 and the wire arranging sleeve 6 are sleeved on the coaxial cable 3, the stainless steel wire 33 is positioned at the outer end compared with the above parts, and the stainless steel wire 33 is erected; sleeving the welding cup 4 on the coaxial cable 3 as in the prior art, so that the metal braid 31 is positioned at the inner side and the stainless steel wire 33 is positioned at the outer side, and then injecting the soldering tin 9 through the welding hole 41 to integrate the welding cup 5 with the coaxial cable 3; then the root of the stainless steel wire 33 is pressed by the extrusion ring 5, and the wire arranging sleeve 6 moves out of the welding cup 4, so that the stainless steel wire 33 is arranged smoothly without influencing the next fixation; and then fixed to the housing 1 by the clamp nut 2, and the soldering cup 4 is clamped as a portion on the coaxial cable 3 at this time. The utility model discloses adopt welded fastening to the metallic braid, adopt to compress tightly fixedly to nonrust steel wire, can avoid nonrust steel wire to drop and cause the shielding layer outside to support and the problem that tensile effect reduces, prevent that the connector from further breaking off with the cable, then can keep the overlap joint between the nonrust steel wire in order to ensure its shielding effect, guarantee the radio frequency performance of product. Such cabling composite structures may be used in coaxial radio frequency connectors including, but not limited to: SMA, K, 2.4mm, 1.85mm, 2.92mm, TNC, BNC, N, BMA, SSBMA, MCX, MMCX, 7/16, and the like.

As shown in fig. 3, the inward side of the clamping nut 2 is provided with an inner tapered surface 21 for holding the pressing ring 5 coaxially with the housing 1. Therefore, the extrusion ring 5 can still be pressed at the root of the stainless steel wire 33 when the connector is bent in multiple directions, and the phenomenon that the stainless steel wire 33 falls out of the extrusion ring 5 to cause instability of electric conductivity is avoided.

As shown in fig. 2, the inner conductor of the coaxial cable 3 is connected to the center pin 7, and a screw sleeve 8 is provided outside the housing 1. The central pin 7 acts as an extension of the inner conductor 34 of the coaxial cable 3 for central conduction, typically with a pointed end for guiding the connection. The threaded sleeve 8 is used to connect the connector to another threaded connection port.

Example 2:

as shown in fig. 5 to 7, the difference from embodiment 1 is that: the extrusion ring 5 is integrally formed on the welding cup 4 ', and a plurality of threading holes 42 which are uniformly distributed around the axis of the welding cup 4 ' are also arranged on the welding cup 4 '. The threading hole 42 is used for the stainless steel wire 33 to pass through, because the width of the threading hole 42 is fixed, the problem of electric conductivity caused by the stainless steel wire 33 being broken by pressure can be avoided. The plurality of threading holes 42 uniformly distributed around the shaft enable the stainless steel wires 33 to be fixed in strands, so that the structure is more stable.

As shown in fig. 5, the inner conductor of the coaxial cable 3 is connected to the center pin 7, and a screw sleeve 8 is provided outside the housing 1. The central pin 7 acts as an extension of the inner conductor 34 of the coaxial cable 3 for central conduction, typically with a pointed end for guiding the connection. The threaded sleeve 8 is used to connect the connector to another threaded connection port.

What has been described above are only some embodiments of the invention. For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which are within the scope of the invention.

Claims

1. The utility model provides a cable junction composite construction of coaxial radio frequency connector of short-tail type, includes hollow structure's casing, penetrates coaxial cable in the casing, is used for welding coaxial cable's metallic braid's welding cup and be used for with the clamping nut of welding cup clamp fixation in the casing, be equipped with a plurality of welding holes on the welding cup, its characterized in that: an extrusion ring used for compressing the stainless steel wires of the coaxial cables is clamped between the clamping nut and the welding cup, and a wire arranging sleeve used for enabling the compressed stainless steel wires to fall down is sleeved on the outer side of the welding cup.

2. The cabling composite structure of a short tail coaxial rf connector according to claim 1, wherein: and an inner conical surface for keeping the extrusion ring and the shell coaxial is arranged on the inward side of the clamping nut.

3. The cabling composite structure of a short tail coaxial rf connector according to claim 1, wherein: the extrusion ring is integrally formed on the welding cup, and a plurality of threading holes which are uniformly distributed around the axis of the welding cup are also formed in the welding cup.

4. The cable connection composite structure of the short tail type coaxial radio frequency connector according to claim 1 or 3, characterized in that: the inner conductor of the coaxial cable is connected with the central needle.

5. The cable connection composite structure of the short tail type coaxial radio frequency connector according to claim 1 or 3, characterized in that: the outside of the shell is provided with a threaded sleeve.