A coaxial cable connection assembly for aerospace applications

Abstract

This invention relates to the field of cable connector technology, and in particular to a coaxial cable connector assembly for aerospace applications. The assembly includes a mandrel connector post with first connection holes formed at both ends. An inner insulating sleeve covers the outer side of the mandrel connector post, with second connection holes formed at both ends of the inner insulating sleeve. A through-hole is formed at the bottom of each second connection hole, penetrating the first connection hole. A shielding connector sleeve is provided outside the inner insulating sleeve, with shielding connection holes formed at both ends. The aluminum foil shielding layer of the coaxial cable is inserted into the shielding connection hole and contacts the shielding connector sleeve. An outer insulating sleeve is provided outside the shielding connection hole, overlapping with the outer side of the braided shielding layer of the coaxial cable. A sealing structure is provided outside the outer insulating sleeve to seal and fix the overlap between the outer insulating sleeve and the braided shielding layer. This improves the stability of the connection between the coaxial cable and the connector assembly at the connection point, avoiding poor contact.

Description

Technical Field

[0001] This invention relates to the field of cable connector technology, and in particular to a coaxial cable connector assembly for aerospace applications. Background Technology

[0002] A coaxial cable consists of an innermost conductor core, an insulation layer wrapped around the conductor core, an aluminum foil shielding layer outside the insulation layer, a braided shielding layer outside the aluminum foil shielding layer, and a protective sleeve outside the braided shielding layer. In operations, it is often necessary to connect two different coaxial cables. In existing technology, connecting two coaxial cables typically uses a connector assembly. However, when using a connector assembly to connect two coaxial cables, poor contact can easily occur at the connection point between the coaxial cable and the connector assembly due to factors such as temperature changes during use. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this invention provides a coaxial cable connection assembly for aerospace applications, which improves the stability of the connection between the coaxial cable and the connection assembly at the connection point and avoids poor contact.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this application provides a coaxial cable connection assembly for aerospace applications, including a spindle connecting post with first connecting holes formed at both ends of the spindle connecting post, into which the conductor spindle of the coaxial cable is inserted; an inner insulating sleeve is wrapped around the outside of the spindle connecting post, with second connecting holes formed at both ends of the inner insulating sleeve, into which the insulation layer of the coaxial cable is inserted; a through hole penetrating the first connecting hole is provided at the bottom of the second connecting hole; a shielding connecting sleeve is provided outside the inner insulating sleeve, with shielding connecting holes formed at both ends of the shielding connecting sleeve, into which the aluminum foil shielding layer of the coaxial cable is inserted and in contact with the shielding connecting sleeve; an outer insulating sleeve is provided outside the shielding connecting hole, overlapping with the outer side of the braided shielding layer of the coaxial cable; a sealing structure is provided outside the outer insulating sleeve to seal and fix the overlap position between the outer insulating sleeve and the braided shielding layer.

[0007] Preferably, the shielding connecting sleeve has a first abutting ring formed on the side wall inside the shielding connecting hole, and the first abutting ring abuts against the aluminum foil shielding layer.

[0008] Preferably, the inner diameter of the second connecting hole is larger than the inner diameter of the connecting hole, the inner diameter of the connecting hole is the same as the inner diameter of the first connecting hole, a retaining ring is formed on the outer side of the connecting hole, and the two ends of the mandrel connecting post abut against the retaining ring.

[0009] Preferably, a first annular groove is formed on the shielding connecting sleeve and on the outer side directly opposite the first abutting ring, and a second abutting ring is integrally formed on the outer insulating sleeve and on the side near the shielding connecting sleeve, the second abutting ring abutting against the inside of the first annular groove.

[0010] Preferably, a second annular groove is formed on the outer side of the outer insulating sleeve near both ends. The length of the second annular groove is greater than that of the first annular groove. A portion of the second annular groove is directly opposite the first annular groove, and the other portion is located on the outer side of the braided shielding layer. The sealing structure cooperates with the second annular groove to fix the outer insulating sleeve and the shielding connecting sleeve.

[0011] Preferably, the sealing structure includes a mounting ring fixed to the outside of the outer insulating sleeve. Both ends of the mounting ring are connected to a fastening assembly. The fastening assembly includes an upper fastening plate and a lower fastening plate, both with semi-circular cross-sections. The upper and lower fastening plates are rotatably connected to the mounting ring. An upper flange is integrally formed on the inner side of the upper fastening plate, and a lower flange is integrally formed on the inner side of the lower fastening plate. When the upper and lower fastening plates are fastened together, the upper and lower flanges are embedded in the second annular groove and abut against the bottom of the second annular groove. A sealing ring is provided between the upper and lower fastening plates, located on both sides of the overlap position between the outer insulating sleeve and the braided shielding layer. A locking ring is detachably connected to the end of the upper and lower fastening plates away from the mounting ring.

[0012] Preferably, the sealing ring includes a first sealing ring and a second sealing ring that are parallel to each other, and a first sealing strip and a second sealing strip are connected between the first sealing ring and the second sealing ring. The first sealing strip and the second sealing strip are located at both ends of the first sealing ring and the second sealing ring in the diametrical direction, and the first sealing strip and the second sealing strip are located between the upper fastening plate and the lower fastening plate. The first sealing ring and the second sealing ring are located on both sides of the overlap position between the outer insulating sleeve and the braided shielding layer.

[0013] Preferably, the upper snap-fit ​​plate and the lower snap-fit ​​plate are respectively provided with abutment ridges with a V-shaped cross section on the side that are close to each other, and the abutment ridges abut against the sealing ring.

[0014] Preferably, the upper and lower fastening plates are provided with a plurality of positioning blocks spaced apart in the circumferential direction on the side of the abutment edge away from the mounting ring, and the positioning blocks abut against the protective sleeve of the coaxial cable.

[0015] Preferably, the locking ring has an internal thread on its inner side, and the upper and lower locking plates have external thread sections on their outer sides away from the mounting ring. The locking ring is threadedly connected to the upper and lower locking plates. A limiting ring is integrally formed at the end of the locking ring near the mounting ring. The limiting ring is located on the side of the external thread section near the mounting ring. Multiple positioning screws are threaded onto the limiting ring. The positioning screws pass through the limiting ring and abut against the upper or lower locking plate.

[0016] (III) Beneficial Effects

[0017] This invention provides a coaxial cable connection assembly for aerospace applications. By creating a first connection hole inside the mandrel connecting post, the conductor mandrel of the coaxial cable is inserted into this hole during connection. This ensures a stable connection between the conductor mandrel and the mandrel connecting post regardless of temperature changes. Simultaneously, an outer sealing structure seals the connection point, while pressure is applied to the outer insulating sleeve, shielding connecting sleeve, and inner insulating sleeve. This causes a first abutment ring inside the shielding connecting sleeve to press against the aluminum foil shielding layer, maintaining a tight connection between the shielding connecting sleeve and the aluminum foil shielding layer. Furthermore, a tight connection is maintained between the shielding connecting sleeve, the outer insulating sleeve, and the outer sealing structure. This ensures both a stable connection between the coaxial cable and the connection assembly, and a secure seal at the connection point. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a coaxial cable connection assembly for aerospace applications according to the present invention;

[0019] Figure 2 This is a schematic diagram of a coaxial cable connection assembly for aerospace applications and its connection to a coaxial cable according to the present invention;

[0020] Figure 3 for Figure 2 Enlarged view of the A-structure in the middle;

[0021] Figure 4 This is a schematic diagram of the protruding locking ring position in a coaxial cable connection assembly for aerospace applications according to the present invention;

[0022] Figure 5 This is a schematic diagram of a protruding sealing ring in a coaxial cable connection assembly for aerospace applications according to the present invention.

[0023] Marked in the attached diagram:

[0024] 100. Mandrel connecting post; 110. First connecting hole; 200. Inner insulating sleeve; 210. Second connecting hole; 220. Communicating hole; 230. Retaining ring; 300. Shielding connecting sleeve; 310. Shielding connecting hole; 320. First abutting ring; 330. First annular groove; 400. Outer insulating sleeve; 410. Second abutting ring; 420. Second annular groove; 500. Sealing structure; 510. Mounting ring; 520. Upper fastening plate; 521. Upper flange; 5 22. Abutting edge; 523. Positioning block; 530. Lower snap-fit ​​plate; 531. Lower flange; 540. Sealing ring; 541. First sealing ring; 542. Second sealing ring; 543. First sealing strip; 544. Second sealing strip; 550. Locking ring; 551. Limiting ring; 552. Positioning screw; 600. Coaxial cable; 610. Conductor core; 620. Insulation layer; 630. Aluminum foil shielding layer; 640. Braided shielding layer; 650. Protective sleeve. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Example

[0027] This invention provides a coaxial cable connection assembly for aerospace applications, see [link / reference]. Figures 1-5 It includes a connecting structure and a sealing structure 500, wherein the connecting structure is connected to the coaxial cable 600, and the outer sealing structure 500 seals the connecting structure and the coaxial motor.

[0028] Specifically, the connection structure includes a spindle connecting post 100, with first connecting holes 110 formed at both ends of the spindle connecting post 100, and the conductor spindle 610 of the coaxial cable 600 is inserted into the first connecting hole 110.

[0029] The outer side of the spindle connecting post 100 is covered with an inner insulating sleeve 200, and the two ends of the inner insulating sleeve 200 form second connecting holes 210. The insulation layer 620 of the coaxial cable 600 is inserted into the second connecting hole 210.

[0030] The bottom of the second connecting hole 210 has a through hole 220 that penetrates the first connecting hole 110. The diameter of the through hole 220 is the same as the diameter of the second connecting hole 210, but the inner diameter of the second connecting hole 210 is larger than the diameter of the through hole 220. Consequently, a retaining ring 230 is formed at the position of the through hole 220 to limit the movement of the mandrel connecting post 100. The retaining ring 230 limits and fixes both ends of the mandrel connecting post 100.

[0031] A shielding connecting sleeve 300 is provided on the outer side of the inner insulating sleeve 200. Shielding connecting sleeve 300 has shielding connecting holes 310 formed at both ends. The aluminum foil shielding layer 630 of the coaxial cable 600 is inserted into the shielding connecting hole 310 and contacts the shielding connecting sleeve 300. An outer insulating sleeve 400 is provided on the outer side of the shielding connecting hole 310. The outer insulating sleeve 400 overlaps with the outer side of the braided shielding layer 640 of the coaxial cable 600. A sealing structure 500 is provided on the outer side of the outer insulating sleeve 400 to seal and fix the overlap position between the outer insulating sleeve 400 and the braided shielding layer 640.

[0032] Furthermore, a first abutment ring 320 is formed on the side wall of the shielding connection sleeve 300 located inside the shielding connection hole 310, and the first abutment ring 320 abuts against the aluminum foil shielding layer 630. The first abutment ring 320 strengthens the connection between the sleeve and the aluminum foil shielding layer 630.

[0033] A first annular groove 330 is formed on the shielding connecting sleeve 300 on the outer side opposite to the first abutting ring 320. A second abutting ring 410 is integrally formed on the outer insulating sleeve 400 on the side closest to the shielding connecting sleeve 300. The second abutting ring 410 abuts against the inside of the first annular groove 330.

[0034] A second annular groove 420 is formed on the outer side of the outer insulating sleeve 400 near both ends. The length of the second annular groove 420 is greater than that of the first annular groove 330. Part of the second annular groove 420 is directly opposite the first annular groove 330, and the other part is located on the outer side of the braided shielding layer 640. The sealing structure 500 cooperates with the second annular groove 420 to fix the outer insulating sleeve 400 and the shielding connecting sleeve 300.

[0035] The sealing structure 500 includes a mounting ring 510 fixed to the outside of the outer insulating sleeve 400. The two ends of the mounting ring 510 are respectively connected to a fastening assembly. The fastening assembly includes an upper fastening plate 520 and a lower fastening plate 530. The upper fastening plate 520 and the lower fastening plate 530 have semi-circular cross sections. The upper fastening plate 520 and the lower fastening plate 530 are rotatably connected to the mounting ring 510.

[0036] An upper flange 521 is integrally formed on the inner side of the upper fastening plate 520, and a lower flange 531 is integrally formed on the inner side of the lower fastening plate 530. When the upper fastening plate 520 and the lower fastening plate 530 are fastened together, the upper flange 521 and the lower flange 531 are embedded in the second annular groove 420 and abut against the bottom of the second annular groove 420.

[0037] When the upper snap-fit ​​plate 520 and the lower snap-fit ​​plate 530 are snapped together and locked, the upper flange 521 and the lower flange 531 are respectively fitted into the second annular groove 420, applying external force to the second annular groove 420, so that the outer insulating sleeve 400 at the position of the second annular groove 420 presses the braided shielding layer 640 and the shielding connecting sleeve 300 respectively. At the same time, the second abutting ring 410 inside the shielding connecting sleeve 300 presses the first annular groove 330, and the second abutting ring 410 presses and fixes the shielding connecting sleeve 300 inside it. The first abutting ring 320 inside the shielding connecting sleeve 300 is pressed against the aluminum foil shielding layer 630.

[0038] Furthermore, a sealing ring 540 is provided between the upper snap-fit ​​plate 520 and the lower snap-fit ​​plate 530. The sealing ring 540 is located on both sides of the overlap position between the outer insulating sleeve 400 and the braided shielding layer 640. A locking ring 550 is detachably connected to the end of the upper snap-fit ​​plate 520 and the lower snap-fit ​​plate 530 away from the mounting ring 510.

[0039] The sealing ring 540 includes a first sealing ring 541 and a second sealing ring 542 that are parallel to each other. A first sealing strip 543 and a second sealing strip 544 are connected between the first sealing ring 541 and the second sealing ring 542. The first sealing strip 543 and the second sealing strip 544 are located at both ends of the first sealing ring 541 and the second sealing ring 542 in the diametrical direction, and the first sealing strip 543 and the second sealing strip 544 are located between the upper fastening plate 520 and the lower fastening plate 530. The first sealing ring 541 and the second sealing ring 542 are located on both sides of the overlap position between the outer insulating sleeve 400 and the braided shielding layer 640. After installation, the first sealing ring 541 and the second sealing ring 542 seal both sides of the overlap position between the outer insulating sleeve 400 and the braided shielding layer 640. At the same time, the first sealing strip 543 and the second sealing strip 544 seal the contact position between the upper fastening plate 520 and the lower fastening plate 530.

[0040] The upper snap-fit ​​plate 520 and the lower snap-fit ​​plate 530 are respectively provided with V-shaped abutment ribs 522 on their adjacent sides, and the abutment ribs 522 abut against the sealing ring 540. The abutment ribs 522 clamp the sealing ring 540, thereby improving the sealing effect.

[0041] Multiple positioning blocks 523 are spaced circumferentially on the upper snap-fit ​​plate 520 and the lower snap-fit ​​plate 530, on the side of the abutment edge 522 away from the mounting ring 510. The positioning blocks 523 abut against the protective sleeve 650 of the coaxial cable 600. The positioning blocks 523 are triangular in shape and their height is less than the thickness of the protective sleeve 650. When the upper snap-fit ​​plate 520 and the lower snap-fit ​​plate 530 abut against each other, the positioning blocks 523 remain engaged and fixed to the outside of the protective sleeve 650, preventing the upper snap-fit ​​plate 520 and the lower snap-fit ​​plate 530 from rotating.

[0042] The locking ring 550 has an internal thread on its inner side, and the upper snap-fit ​​plate 520 and the lower snap-fit ​​plate 530 have an external thread section on their outer sides at the ends away from the mounting ring 510.

[0043] The locking ring 550 is threadedly connected to the upper snap-fit ​​plate 520 and the lower snap-fit ​​plate 530. A limit ring 551 is integrally formed at the end of the locking ring 550 near the mounting ring 510. The limit ring 551 is located on the side of the external thread section near the mounting ring 510. Multiple positioning screws 552 are threadedly connected to the limit ring 551. The positioning screws 552 pass through the limit ring 551 and abut against the upper snap-fit ​​plate 520 or the lower snap-fit ​​plate 530.

[0044] This invention provides a coaxial cable connection assembly for aerospace applications. By creating a first connection hole inside the mandrel connecting post, the conductor mandrel of the coaxial cable is inserted into this hole during connection. This ensures a stable connection between the conductor mandrel and the mandrel connecting post regardless of temperature changes. Simultaneously, an outer sealing structure seals the connection point, while pressure is applied to the outer insulating sleeve, shielding connecting sleeve, and inner insulating sleeve. This causes a first abutment ring inside the shielding connecting sleeve to press against the aluminum foil shielding layer, maintaining a tight connection between the shielding connecting sleeve and the aluminum foil shielding layer. Furthermore, a tight connection is maintained between the shielding connecting sleeve, the outer insulating sleeve, and the outer sealing structure. This ensures both a stable connection between the coaxial cable and the connection assembly, and a secure seal at the connection point.

[0045] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Without conflict, the embodiments and features in the embodiments of this invention can be combined with each other.

[0047] The embodiments described above are merely illustrative of implementation methods of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. An aerospace coaxial cable connection assembly, characterized by: Includes a spindle connecting post (100), with first connecting holes (110) formed at both ends of the spindle connecting post (100), and the conductor spindle (610) of the coaxial cable (600) is inserted into the first connecting hole (110); The outer side of the spindle connecting post (100) is wrapped with an inner insulating sleeve (200), and the two ends of the inner insulating sleeve (200) are formed with second connecting holes (210). The insulation layer (620) of the coaxial cable (600) is inserted into the second connecting hole (210). The bottom of the second connecting hole (210) is provided with a through hole (220) that penetrates the first connecting hole (110). A shielding connection sleeve (300) is provided on the outside of the inner insulating sleeve (200). Shielding connection holes (310) are formed at both ends of the shielding connection sleeve (300). The aluminum foil shielding layer (630) of the coaxial cable (600) is inserted into the shielding connection hole (310) and contacts the shielding connection sleeve (300). An outer insulating sleeve (400) is provided on the outside of the shielding connection hole (310), and the outer insulating sleeve (400) overlaps with the outer side of the braided shielding layer (640) of the coaxial cable (600); a sealing structure (500) is provided on the outside of the outer insulating sleeve (400) to seal and fix the overlap position of the outer insulating sleeve (400) and the braided shielding layer (640). The shielding connecting sleeve (300) has a first abutting ring (320) formed on the side wall inside the shielding connecting hole (310), and the first abutting ring (320) abuts against the aluminum foil shielding layer (630); A first annular groove (330) is formed on the shielding connecting sleeve (300) and on the outer side opposite to the first abutting ring (320). A second abutting ring (410) is integrally formed on the outer insulating sleeve (400) and on the side close to the shielding connecting sleeve (300). The second abutting ring (410) abuts against the inside of the first annular groove (330). A second annular groove (420) is formed on the outer side of the outer insulating sleeve (400) and near both ends. The length of the second annular groove (420) is greater than that of the first annular groove (330). A portion of the second annular groove (420) is directly opposite the first annular groove (330), and the other portion is located on the outer side of the braided shielding layer (640). The sealing structure (500) cooperates with the second annular groove (420) to fix the outer insulating sleeve (400) and the shielding connecting sleeve (300); The sealing structure (500) includes a mounting ring (510) fixed to the outside of the outer insulating sleeve (400). The two ends of the mounting ring (510) are respectively connected to a fastening assembly. The fastening assembly includes an upper fastening plate (520) and a lower fastening plate (530). The upper fastening plate (520) and the lower fastening plate (530) have semi-circular cross sections. The upper fastening plate (520) and the lower fastening plate (530) are rotatably connected to the mounting ring (510). An upper flange (521) is integrally formed on the inner side of the upper fastening plate (520), and a lower flange (531) is integrally formed on the inner side of the lower fastening plate (530). When the upper fastening plate (520) and the lower fastening plate (530) are fastened together, the upper flange (521) and the lower flange (531) are embedded in the second annular groove (420) and abut against the bottom of the second annular groove (420). A sealing ring (540) is provided between the upper fastening plate (520) and the lower fastening plate (530), and the sealing ring (540) is located on both sides of the overlap position between the outer insulating sleeve (400) and the braided shielding layer (640); The upper snap-fit ​​plate (520) and the lower snap-fit ​​plate (530) are detachably connected to a locking ring (550) at the end away from the mounting ring (510).

2. An aerospace coaxial cable connector assembly according to claim 1, wherein: The inner diameter of the second connecting hole (210) is larger than the inner diameter of the connecting hole (220). The inner diameter of the connecting hole (220) is the same as the inner diameter of the first connecting hole (110). A retaining ring (230) is formed on the outside of the connecting hole (220). The two ends of the spindle connecting post (100) abut against the retaining ring (230).

3. The aerospace coaxial cable connection assembly according to claim 1, characterized in that: The sealing ring (540) includes a first sealing ring (541) and a second sealing ring (542) that are parallel to each other. A first sealing strip (543) and a second sealing strip (544) are connected between the first sealing ring (541) and the second sealing ring (542). The first sealing strip (543) and the second sealing strip (544) are located at the two ends of the diameter direction of the first sealing ring (541) and the second sealing ring (542), and the first sealing strip (543) and the second sealing strip (544) are located between the upper fastening plate (520) and the lower fastening plate (530). The first sealing ring (541) and the second sealing ring (542) are located on both sides of the overlap position between the outer insulating sleeve (400) and the braided shielding layer (640).

4. The aerospace coaxial cable connection assembly according to claim 1, characterized in that: The upper snap-fit ​​plate (520) and the lower snap-fit ​​plate (530) are respectively provided with abutment ribs (522) with V-shaped cross sections on the side close to each other, and the abutment ribs (522) abut against the sealing ring (540).

5. The aerospace coaxial cable connection assembly according to claim 4, characterized in that: On the upper snap-fit ​​plate (520) and the lower snap-fit ​​plate (530), and on the side of the abutment edge (522) away from the mounting ring (510), a plurality of positioning blocks (523) are provided at intervals along the circumferential direction, and the positioning blocks (523) abut against the protective sleeve (650) of the coaxial cable (600).

6. The aerospace coaxial cable connection assembly according to claim 1, characterized in that: The locking ring (550) has an internal thread on its inner side, and the upper snap-fit ​​plate (520) and the lower snap-fit ​​plate (530) have an external thread section on their outer sides away from the mounting ring (510). The locking ring (550) is threadedly connected to the upper snap-fit ​​plate (520) and the lower snap-fit ​​plate (530). A limiting ring (551) is integrally formed at one end of the locking ring (550) near the mounting ring (510). The limiting ring (551) is located on the side of the external thread section near the mounting ring (510). A plurality of positioning screws (552) are threadedly connected to the limiting ring (551). The positioning screws (552) pass through the limiting ring (551) and abut against the upper snap-fit ​​plate (520) or the lower snap-fit ​​plate (530).

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