Multi-signal transmission spring cable

Abstract

The invention discloses a multi-signal transmission spring cable which is characterized in that the multi-signal transmission spring cable comprises a spring-shaped cable, one end of the cable is connected with a tail accessory through a heat shrink tube, and the tail accessory is connected with a pull-off separation connector; the cable comprises a 1553B bus arranged in a central area, a first wire arranged on a second layer, and an SFF coaxial radio frequency line and a second wire which are arranged on a third layer. The sheath is arranged on the outermost layer; the total shielding layer is arranged on the secondary outer layer; separation layers are respectively arranged on the inner side and the outer side of the second layer; and filling materials are arranged in gaps among the layers. According to the cable, connection and launching of a weapon system are achieved in the mode that the cylindrical pin type pull-off separation connector is fixed to an airplane. The cable has the advantages of multi-signal transmission, pulling resistance, wear resistance, high mechanical strength, high environmental adaptability, high electromagnetic interference resistance and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of cable structures, and in particular relates to a spring cable for multi-signal transmission, which is mainly used in aircraft weapon systems. Background Art

[0002] With the rapid development of the aircraft industry, the market demand for aircraft accessory manufacturing industry has increased. At the same time, higher requirements have been put forward for the structural design and reliability of various aircraft components. Cables are generally installed inside and outside the aircraft fuselage. The working environment is diverse and complex. They may be exposed to strong winds, electromagnetic interference, impact and other environments. The requirements for the tensile strength and environmental resistance of cables are further improved. The existing ordinary structure cannot meet the requirements. It is required that the cable has good elasticity and can resist electromagnetic interference while the weapon system is launched.

[0003] With the continuous upgrading and improvement of aircraft, higher requirements are placed on aircraft wiring harnesses, so a spring cable with multi-signal transmission is urgently needed. Summary of the invention

[0004] The object of the present invention is to provide a spring cable for multi-signal transmission to solve the problems in the prior art.

[0005] The present invention is implemented through the following technical scheme: a spring cable for multi-signal transmission, characterized in that: it includes a spring-shaped cable, one end of the cable is connected to the tail accessory through a heat shrink tube, and the tail accessory is connected to a pull-off separation connector; the cable includes a 1553B bus arranged in the central area, a first conductor arranged on the second layer, an SFF coaxial radio frequency line and a second conductor arranged on the third layer; and a sheath arranged on the outermost layer and a general shielding layer arranged on the second outer layer; separation layers are respectively arranged on the inner and outer sides of the second layer; and filling materials are arranged in the gaps between the layers.

[0006] Further: the 1553B bus has 3 groups, the first wires have 12 wires, and the first wires are 1.0 mm 2 The second wire has 10 wires, and the second wire is 0.35 mm 2 Wire.

[0007] Furthermore: the sheath is made of high-strength and wear-resistant elastomer material.

[0008] Further: the overall shielding layer is a steel wire braided layer.

[0009] Furthermore: the filling material is polyurethane.

[0010] Further: the filling material in the central area is evenly filled, the second layer of filling material is at the bottom, and the third layer of filling material is at the lower left.

[0011] Further: the pull-off separation connector is of cylindrical pin type.

[0012] The advantages of the present invention are: the cable of the present invention is fixed on the aircraft by a cylindrical pin type pull-off connector to achieve the connection and launch of the weapon system. At the same time, the 1553B bus, SFF coaxial radio frequency line, and low-frequency wire are used to form a spring cable, and the spring cable as a whole can transmit a variety of signals such as high and low frequencies. The present invention has the advantages of transmitting multiple signals, resisting pulling, wear resistance, high mechanical strength, strong environmental adaptability, and strong anti-electromagnetic interference ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the cable cross-section structure; Figure 3 This is a schematic diagram of the structure of a cylindrical pin type pull-off separation connector.

[0014] Explanation of the numbers in the figure: 1 is the pull-off connector, 2 is the tail accessory, 3 is the heat shrink tube, and 4 is the cable; 40 is a separation layer, 41 is a 1553B bus, 42 is a first conductor, 43 is a SFF coaxial radio frequency line, 44 is a second conductor, 45 is a general shielding layer, 46 is a sheath, and 47 is a filling material. DETAILED DESCRIPTION

[0015] Reference Figure 1-3 The present invention discloses a spring cable for multi-signal transmission, comprising a spring-shaped cable 4, one end of which is connected to a tail accessory 2 through a heat shrink tube 3, and the tail accessory 2 is connected to a pull-off separation connector 1; the cable 4, viewed from a cross section, comprises a 1553B bus 41 arranged in a central area, a first conductor 42 arranged in a second layer, an SFF coaxial radio frequency line 43 and a second conductor 44 arranged in a third layer; a sheath 46 arranged in an outermost layer and a total shielding layer 45 arranged in a second outer layer; a separation layer 40 is respectively arranged on the inner side and the outer side of the second layer; a filling material 47 is arranged in the gap position of each layer.

[0016] Preferably, the 1553B bus has 3 groups, the first wires have 12 wires, and the first wires are 1.0 mm thick. 2 The second wire has 10 wires, and the second wire is 0.35mm 2 Wire.

[0017] Preferably, the sheath is made of high-strength and wear-resistant elastomeric material.

[0018] Preferably, the overall shielding layer is a steel wire braided layer.

[0019] Preferably, the filling material is polyurethane.

[0020] Preferably: the filling material in the central area is filled uniformly, the second layer of filling material is at the bottom, and the third layer of filling material is at the lower left. In the cable, the conductors are all filled with filling material, which can stabilize the conductors. At the same time, the aforementioned filling material at the bottom or lower left means that there is a continuous functional space at the corresponding position, with no conductor passing through, only filling material. This structural setting enables the spring cable to have better bending and stretching deformation capabilities during the bending and forming process and the subsequent stretching process. Even if it is bent with a very small radius, it will not cause damage to the conductor, thereby improving the service life and reliability of the product.

[0021] Preferably, the pull-off separation connector is of cylindrical pin type, the main body is connected to the tail attachment via threads, and the cylindrical pin is fixedly connected to the body of the aircraft.

[0022] Embodiment: A spring cable for multi-signal transmission, including a pull-off connector, a tail attachment, a heat shrink tube, and a spring wire. The spring cable is fixed to the aircraft by a cylindrical pin-type pull-off connector to achieve the connection and launch of the weapon system. At the same time, the 1553B bus, SFF coaxial radio frequency line, and low-frequency wire are used to form a spring wire cable. The spring cable as a whole can transmit multiple signals such as high and low frequencies. It has the advantages of transmitting multiple signals, resisting pulling, wear resistance, high mechanical strength, strong environmental adaptability, and strong anti-electromagnetic interference ability.

[0023] Preferably, the pull tube of the electrical connector on the spring cable is designed to Cylindrical pin structure , unlike the previous pull-off connector, the pull-off connector used in the spring cable Remove the steel wire structure of the ignition cord assembly, change the pull tube into a cylindrical pin structure, and The connection between the pin and the bracket realizes the positioning function when the plug and socket are separated. Mechanical life can reach 500 times (250 times of connection and separation, 250 times of connection and separation) 。

[0024] Preferably, the spring cable for multi-signal transmission is made of spring wires, which are composed of 1553B bus, SFF coaxial RF line and low-frequency wire. The spring cable can transmit multiple signals such as high and low frequencies. The wires of each signal are protected and isolated with corresponding sheaths. The spring cable can transmit multiple signals such as high and low frequencies and prevent signal crosstalk. Since the spring cable composed of high and low frequency wires is used for the first time, in order to determine the influence of spring wire winding on the electrical performance of coaxial RF cable, the attenuation constant test is required in accordance with relevant requirements. From the test results, it can be seen that the attenuation degree of coaxial RF cable is basically the same when it is wound into a spring and when it is straightened, which means that the influence of winding into a spring on the signal attenuation of coaxial RF cable is very small and can be ignored.

[0025] Preferably, the spring cable for multi-signal transmission uses a large-section spring wire for the first time. The spring wire is composed of 30 groups of conductor cores. The multiple cores are combined into a cable, filled, and wrapped with a layer of tape. The outermost layer is sheathed with high-strength and wear-resistant elastomer material. The wire diameter of the spring cable is (18-20) mm, the spring diameter is Φ (80-90) mm, and the number of spring coils is (6±1). Although the outer diameter of the cable is large, it can still meet the requirement of a small bending radius. The spring wire shrinks together as a whole when not in use, and can be stretched to a certain length when in use. It has a certain degree of softness and stretchability. It is also wear-resistant and drag-resistant, and is suitable for mobile places. After stretching 1,000 times, the spring part can still return to its original state. At the same time, in order to improve space utilization, Use curved tail according to user needs The bending radius of the cable will become smaller. Although the bending radius of the spring cable part is less than 6D (i.e. 120mm), the spring The spring part is aged under the action of the thermoplastic process, and the concentrated stress on the wire core is released. The cable outlet direction can be adjusted as required.

[0026] Preferably, the spring cable for multi-signal transmission is different from the previous spring cable. The previous spring cable is generally composed of two wire core conductors, and there is no wire shielding layer and total shielding, which is susceptible to electromagnetic interference. The 1553B bus and SFF coaxial RF line in the spring cable for multi-signal transmission are overall increased with a silver-plated copper wire braided sheath, and a total shield is added to the high and low frequency wires to prevent signal crosstalk and ensure anti-electromagnetic interference. Ensure that the aircraft wiring harness can work normally in an environment such as electromagnetic interference.

Claims

1. A spring cable for multi-signal transmission, characterized in that: It includes a spring-shaped cable, one end of which is connected to a tail attachment through a heat shrink tube, and the tail attachment is connected to a pull-off separation connector; The cable includes a 1553B bus arranged in a central area, a first conductor arranged in a second layer, and an SFF coaxial radio frequency line and a second conductor arranged in a third layer; and a sheath arranged at the outermost layer and a general shielding layer arranged at the second outer layer; Separation layers are respectively arranged on the inner side and the outer side of the second layer; Filling materials are arranged in the gaps between the layers.

2. The spring cable for multi-signal transmission according to claim 1, characterized in that: The 1553B bus has 3 groups, the first conductors have 12, and the first conductors are 1.0 mm 2 The second wire has 10 wires, and the second wire is 0.35 mm 2 Wire.

3. The spring cable for multi-signal transmission according to claim 1, characterized in that: The sheath is made of high-strength wear-resistant elastic material.

4. The spring cable for multi-signal transmission according to claim 1, characterized in that: The overall shielding layer is a steel wire braided layer.

5. The spring cable for multi-signal transmission according to claim 1, characterized in that: The filling material is polyurethane.

6. The spring cable for multi-signal transmission according to claim 1, characterized in that: The filling material in the central area is filled evenly, the second layer of filling material is at the bottom, and the third layer of filling material is at the lower left.

7. The spring cable for multi-signal transmission according to claim 1, characterized in that: The pull-off connector is a cylindrical pin type.

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