Electromagnetically shielded vacuum plug structure

Abstract

The application discloses to the technical field of vacuum conductive connection, and particularly relates to a vacuum plug structure with electromagnetic shielding, which comprises a shell one, a shell two and a conductive connecting piece; one end of the shell one is connected with one end of the shell two and is surrounded with the shell two to form an installation cavity; the conductive connecting piece is arranged in the installation cavity, and the conductive connecting piece comprises an insulator one, an insulator two and a pin which is respectively inserted in the insulator one and the insulator two; the insulator one, the insulator two and the pin are axially fastened and assembled through a step structure one; the small steps are used to match the spare parts of the application, so that the threads or key pins are avoided, the compact appearance size is achieved, the assembly and disassembly are facilitated, and a larger number of pins can be arranged in the smallest size.

Description

Technical Field

[0001] This application relates to the field of vacuum conductive connection technology, specifically to an electromagnetically shielded vacuum plug structure. Background Technology

[0002] A vacuum connector is a specialized connector installed on the wall of a vacuum container for the transmission of signals, power, or fluids inside and outside the container. It must possess characteristics such as airtightness, internal and external permeability, low vacuum release rate, and resistance to extreme environments.

[0003] A vacuum plug is a specialized wiring device used on the vacuum side of a vacuum connector. The wires from signal or power devices inside the vacuum container are connected to the vacuum side of the vacuum connector via the vacuum plug, and then the signals and power are transmitted to the signal devices in the atmospheric environment via the atmospheric side plug of the vacuum connector, thus achieving the purpose of connecting the inside and outside of the vacuum.

[0004] Electromagnetically shielded vacuum plugs are vacuum electrical connectors specifically designed to suppress electromagnetic interference (EMI). They are widely used in applications with high electromagnetic compatibility (EMC) requirements, such as aviation, communications, industrial control, and high-speed data transmission. Their core purpose is to prevent the internal signals of the plug from being affected by external electromagnetic interference, while also preventing the plug itself from becoming a source of interference.

[0005] Electromagnetically shielded vacuum plugs are connection devices that, through structural design and material selection, are equipped with the ability to shield against electromagnetic interference and can be used for a long time in a vacuum environment, based on ordinary electrical plugs. They are usually used in conjunction with shielded vacuum cables to form a complete shielding system, ensuring the stability of signal transmission and the safety of equipment.

[0006] Existing technical solutions generally adopt the structure of a circular aviation plug and a push-pull self-locking structure; both of these vacuum plugs have electromagnetic shielding functions and are generally composed of the following parts: shell, connecting nut, insulator assembly, pin, retaining ring, key pin, and tail accessory.

[0007] The shell is typically made of aluminum alloy that has been machined and then electroplated, and is used for mechanical protection and shielding. A coupling nut is used to lock the plug onto other connectors; The insulator insert is the core "skeleton," and it is generally made of thermosetting engineering plastic injection molding. It has a precision array of holes on the front to facilitate the insertion of the insert. The pin is generally made of copper alloy, with one end being the plug-in contact section and the other end being the wiring section. The wiring method is soldering or crimping. The fit between the pin and the insulator assembly is generally through injection molding with pins or clamping with barbs. After installation, it cannot be disassembled or can only be disassembled with special tools. Retaining rings and keying pins are used for internal mechanical foolproofing, preventing disassembly or twisting between insulator components and housing; The cable gland / backshell is a straight or bent cable harness structure that is threaded to the outer shell. The cable outlet has a silicone clamping ring or a metal pressure ring that can clamp the wire shielding mesh to form a 360° shielding continuity.

[0008] Existing vacuum plugs have the following disadvantages: 1. It has many parts and is complicated to install, which may require the use of special loading and unloading tools, and may even be non-disassembly. 2. Due to the large number of components installed in the circumferential or axial direction, the overall mechanical size is large and not compact enough. Utility Model Content

[0009] The purpose of this application is to provide an electromagnetically shielded vacuum plug structure to solve the technical problems mentioned in the background art.

[0010] To achieve the above objectives, this application provides the following technical solution: an electromagnetically shielded vacuum plug structure, comprising a first outer shell, a second outer shell, and conductive connectors; One end of the outer shell is connected to one end of the outer shell, and together with the outer shell, they form an installation cavity; The conductive connector is disposed in the mounting cavity, and the conductive connector includes an insulator one, an insulator two, and pins at both ends inserted into the insulator one and the insulator two respectively. The insulator one, insulator two, and pin are axially fastened together by a stepped structure.

[0011] In one embodiment, the step structure one includes: The step five, located at the upper end of the first insulator, cooperates with the lower end of the second insulator to achieve the docking and fastening of the first insulator and the second insulator; The step four, located inside the insulator two, cooperates with the pin to achieve axial fixation of the pin.

[0012] In one embodiment, the conductive connector is disposed within the mounting cavity and axially fastened together via a stepped structure two, wherein the stepped structure two includes: The step one, which is set inside the outer shell one, cooperates with the outer periphery of the insulator one to fasten the insulator one to the outer shell one; The step three, located inside the outer shell two, engages with the outer periphery of the insulator two to fasten the insulator two to the outer shell two.

[0013] In one embodiment, the second outer shell and the first outer shell are connected and locked together by a vacuum screw. Specifically, the second outer shell has at least one stepped hole, and a vacuum screw is installed in the stepped hole. The vacuum screw passes through the second outer shell and is screwed into the first outer shell to lock the first outer shell and the second outer shell together.

[0014] In one embodiment, the outer shell one is further provided with a step two that cooperates with one end of the outer shell two to achieve fastening.

[0015] In one embodiment, one end of the outer casing 2 is provided with a wire outlet hole, and one end of the outer casing 2 is provided with a wire harness clamping part that fixes and locks the wire harness in the wire outlet hole and forms a circumferential shield.

[0016] In one embodiment, the wire harness clamping part locks and fixes the wire harness by means of screwing, tightening with a nut, heat shrinking, or cable ties; the wire harness clamping part locked by screwing includes an arc-shaped cover integrally formed on one end of the outer shell, a pressure cap located on one side of the arc-shaped cover, and a vacuum screw that passes through the pressure cap and is screwed into the arc-shaped cover.

[0017] In one embodiment, a second vacuum screw is provided, which is used to fasten the vacuum plug structure composed of the first housing and the second housing to the external vacuum connector. The second vacuum screw is provided on the vacuum plug structure. Specifically, the second housing has at least one stepped hole, and the first stepped hole is provided with a second vacuum screw. One end of the second vacuum screw passes through the second housing and enters the interior of the first housing or extends outward from the interior of the first housing.

[0018] In one embodiment, the two ends of the pin are respectively: a terminal for connecting to an electrical wire inside the second insulator, and a plug-in terminal for plugging and unplugging conductive pins of other connectors inside the first insulator.

[0019] In one embodiment, the outer surface of the second housing is provided with anti-slip texture.

[0020] Compared with the prior art, the beneficial effects of this application are: 1) The components of this application use small steps to fit together, avoiding the use of threads or key pins. This allows for a compact size and easy assembly and disassembly, while also allowing for a greater number of pins to be installed in a smaller size.

[0021] 2) All materials used in this application are vacuum materials with low gas release rate, high and low temperature resistance, and radiation resistance. Insulation materials include PEEK, fluoroplastics, ceramics, etc. The outer shell conductive material is made of stainless steel, aluminum alloy, titanium alloy, etc. The pin conductive material is made of copper alloy or other special materials such as thermocouple-specific materials.

[0022] 3) The vacuum plug of this application does not use a rotating installation structure, so that more vacuum plugs can be installed in a relatively narrow space. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of step hole one and step hole two in this application; Figure 2 This is a schematic diagram of the structure of vacuum screw one and vacuum screw two of this application; Figure 3 This is a schematic diagram of the wire harness clamping part structure of this application; Figure 4 This is a front sectional view of this application; Figure 5 This is a side sectional view of this application; Figure 6 This is a schematic diagram of the structure of the stepped hole two and the vacuum screw one in this application.

[0024] In the diagram: 1. Outer shell one; 11. Step one; 12. Step two; 2. Outer shell two; 21. Step hole one; 22. Step hole two; 23. Anti-slip texture; 24. Vacuum screw one; 25. Vacuum screw two; 26. Step three; 3. Wire harness clamping part; 31. Arc-shaped cover; 32. Pressure cap; 33. Vacuum screw three; 34. Outlet hole; 4. Conductive connector; 41. Insulator one; 42. Insulator two; 43. Pin; 431. Terminal; 432. Plug-in terminal; 44. Step four; 45. Step five. Detailed Implementation

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

[0026] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and 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 this application. Example

[0027] Please see Figure 1 , Figure 2 and Figure 4 This application provides a technical solution: An electromagnetically shielded vacuum plug structure includes a housing 1, a housing 2, and a conductive connector 4; One end of the outer shell 1 is connected to one end of the outer shell 2, and together with the outer shell 2, they form an installation cavity; The conductive connector 4 is disposed in the mounting cavity, and the conductive connector 4 includes an insulator 41, an insulator 42, and pins 43 with both ends inserted into the insulator 41 and the insulator 42 respectively. The insulator 41, insulator 42, and pin 43 are axially fastened together by a stepped structure.

[0028] Step structure one includes: The step 45, located at the upper end of the first insulator 41, engages with the lower end of the second insulator 42 to achieve the docking and fastening of the first insulator and the second insulator. The step 44, which is disposed inside the insulator 42, cooperates with the pin 43 to achieve axial fixation of the pin 43.

[0029] In this embodiment, the insulator 41, the insulator 42, and the pin 43 are fastened together by steps 44 and 55 to complete the assembly. There are no threads or key pins, so the structure is compact and can install the maximum number of pins 43 in the smallest volume, and it is easy to install and remove.

[0030] In this embodiment, one end of the pin 43 is a plug-in end 432, used for plugging and unplugging conductive pins of other connectors; the plug-in end 432 has two forms, one is pin-shaped (male pin) and the other is hole-shaped (female pin). The plug-in end 432 shown in the accompanying drawings of this application is hole-shaped, and in actual use, it can be flexibly selected according to the requirements. It can be hole-shaped or pin-shaped, or even a combination of pin-shaped and hole-shaped; the other end of the pin 43 is a terminal 431, used to connect the wire. The connection method between the terminal 431 and the wire is crimping or soldering; the pin 43 is located between insulator one 41 and insulator two 42; Insulator 1 41 and Insulator 2 42 are made of the same insulating material, using materials with low gas release rate under vacuum, such as PEEK, Teflon, ceramics, etc.; Outer shell 1 and Outer shell 2 are made of the same metal material, using conductive materials with low gas release rate and good electromagnetic shielding effect, such as stainless steel, aluminum alloy, titanium alloy, etc., or can be replaced with insulating non-metallic materials, and then a layer of conductive material is covered, sprayed or deposited on the surface of the insulating non-metallic material to achieve the same electromagnetic shielding effect; Insulator 1 41 is provided with multiple through holes to accommodate the insertion and removal ends 432 of multiple pins 43; Correspondingly, Insulator 2 42 is provided with multiple through holes to accommodate the wiring ends 431 of multiple pins 43; Step 44 is used between Insulator 1 41 and Insulator 2 42 to limit the pins 43. After insulator 1 41 and insulator 2 42 are assembled, each pin 43 is insulated from and independent of each other; on this basis, the size and number of pins 43 are not unique, and different types and numbers of pins 43 can be installed in insulator 1 41 and insulator 2 42 at the same time. Example

[0031] Please see Figures 1-4 This application provides a technical solution: Embodiment 2 includes all the structures in Embodiment 1, but Embodiment 2 differs from Embodiment 1 in that: The conductive connector 4 is disposed within the mounting cavity and is axially fastened and assembled via the stepped structure two, wherein the stepped structure two includes: The step 11 disposed inside the outer shell 1 cooperates with the outer periphery of the insulator 41 to fasten the insulator 41 to the outer shell 1. The step 26 disposed inside the outer shell 2 cooperates with the outer periphery of the insulator 42 to fasten the insulator 42 to the outer shell 2.

[0032] In this embodiment, the conductive connector 4 is assembled and placed into the mounting cavity of the outer shell 1 and the outer shell 2. The conductive connector 4 is fastened and assembled by the step 11 in the outer shell 1 and the step 26 in the outer shell 2. Specifically, the insulator 41 and the outer shell 1 are limited by the step 11, and the insulator 42 and the outer shell 2 are limited by the step 26. There are no threads or key pins, the structure is compact, and it is easy to install and remove.

[0033] In this embodiment, the outer shell 2 and the outer shell 1 are connected and locked together by a vacuum screw 24. Specifically, the outer shell 2 has at least one stepped hole 22 inside, and a vacuum screw 24 is installed in the stepped hole 22. The vacuum screw 24 passes through the outer shell 2 and is screwed into the outer shell 1 to lock the outer shell 1 and the outer shell 2 together. The outer shell 1 also has a stepped hole 12 inside, which cooperates with one end of the outer shell 2 to achieve fastening. It should be noted that the stepped hole 22 can also be formed on the outer shell 1.

[0034] The outer casing 1 and the outer casing 2 are fitted together by step 2 12 and locked with vacuum screw 24 to prevent the two casings from loosening; at the same time, it can also ensure the stability of the conductive connector 4 between the outer casing 1 and the outer casing 2. Example

[0035] Please see Figures 1-4 This application provides a technical solution: Embodiment 3 includes all the structures in Embodiments 1-2, but Embodiment 3 differs from Embodiments 1-2 in that: One end of the outer casing 2 is provided with a wire outlet hole 34, and one end of the outer casing 2 is provided with a wire harness clamping part 3 that fixes and locks the wire harness in the wire outlet hole 34 and forms a circumferential shield.

[0036] The wire harness clamping part 3 can lock and fix the wire harness in a variety of ways, such as screw locking (the locking method used in this embodiment), nut tightening (the nut tightening structure in the push-pull self-locking structure), heat shrink locking (after the wire harness comes out of the outlet hole 34, it can be directly covered with a heat shrink shielding sleeve and then heat-shrinked to achieve locking), cable tie locking (the shielding sleeve is fixed with a cable tie or similar fastener), and other locking methods. In this embodiment, a screw-locking method is adopted, specifically: the wire harness clamping part 3 includes an arc-shaped cover 31 integrally formed on one end of the outer shell 2, a pressure cover 32 located on one side of the arc-shaped cover 31, and a vacuum screw 33 passing through the pressure cover 32 and screwed into the arc-shaped cover 31.

[0037] In this embodiment, all wires connected to the pin 43 converge at their free ends and exit through the outlet hole 34 at the end of the outer casing 2. The wire harness is covered by a shielding sleeve (not shown in the figure). The pressure cap 32 is used to press the shielding sleeve of the wire harness tightly. The pressure cap 32 and the arc-shaped cover 31 are locked together with a vacuum screw 33. In this way, a 360-degree fully enclosed shielding cover is formed outside the connection between the pin 43 and the wire harness. Example

[0038] Please see Figures 1-4This application provides a technical solution: Embodiment 4 includes all the structures in Embodiments 1-3, but Embodiment 4 differs from Embodiments 1-3 in that: It also includes a second vacuum screw 25, which is used to fasten the vacuum plug structure composed of outer shell 1 and outer shell 2 to the external vacuum connector. The second vacuum screw 25 is disposed on the vacuum plug structure; specifically: The interior of the outer shell 2 has at least one stepped hole 21, and a vacuum screw 25 is provided in the stepped hole 21. One end of the vacuum screw 25 passes through the outer shell 2 and enters the interior of the outer shell 1 or extends outward from the interior of the outer shell 1. The function of vacuum screw 25 is to lock the entire plug structure onto other vacuum connectors. The entire plug structure has been pre-assembled into a whole with other structures. Therefore, vacuum screw 25 can be installed only on housing 2, or only on housing 1, or on both housing 2 and housing 1. Furthermore, housing 2 and housing 1 can have different shapes.

[0039] In this embodiment, both outer casing 1 and outer casing 2 are provided with stepped holes 21 for vacuum screws 25. After passing through the stepped holes 21, the vacuum screws 25 can be threaded and locked to other vacuum connectors to achieve the matching installation of the vacuum plugs (the vacuum screws 25 are mainly used to lock the entire set of vacuum plugs onto other vacuum connectors). The vacuum screws 25 are made of conductive material and can be made of the same material as the outer casing 1. When the entire set of vacuum plugs is plugged in and out with other vacuum connectors, the plugging and unplugging gaps will also form a shielded and sealed structure, and the shielding layers between them are connected by the vacuum screws 25.

[0040] Vacuum screw 1 24, vacuum screw 2 25, and vacuum screw 3 33 all use the same conductive material as housing 1, and the screw center has a through hole or external thread groove structure to prevent air from accumulating in the thread gap. Example

[0041] Please see Figure 1 This application provides a technical solution: Embodiment 5 includes all the structures in Embodiments 1-4, but Embodiment 5 differs from Embodiments 1-4 in that: The outer surface of the outer shell 2 is provided with anti-slip texture 23 to increase the friction when a person inserts or removes the vacuum plug.

[0042] The shape of the plug in this application is not limited to the shape shown in the accompanying drawings, and can also be a round plug or a non-circular plug; and in order to prevent electromagnetic leakage at all mating joints, shielding material can also be filled at the joints.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this application. It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or basic characteristics of this application. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this application is defined by the appended claims rather than the foregoing description. Therefore, it is intended to encompass all variations falling within the meaning and scope of equivalents of the claims within this application, and no reference numerals in the claims should be regarded as limiting the scope of the claims.

[0044] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electromagnetically shielded vacuum plug structure, comprising a first outer shell (1), a second outer shell (2), and a conductive connector (4), characterized in that: One end of the outer shell (1) is connected to one end of the outer shell (2) and together with the outer shell (2) form an installation cavity; The conductive connector (4) is disposed in the mounting cavity, and the conductive connector (4) includes an insulator one (41), an insulator two (42), and pins (43) inserted into the insulator one (41) and the insulator two (42) respectively at both ends. The insulator one (41), insulator two (42), and pin (43) are axially fastened together by a stepped structure.

2. The electromagnetically shielded vacuum plug structure according to claim 1, characterized in that: The stepped structure includes: The step five (45) set on the upper end of the first insulator (41) cooperates with the lower end of the second insulator (42) to realize the docking and fastening of the first insulator and the second insulator; The step four (44) disposed inside the insulator two (42) cooperates with the pin (43) to achieve axial fixation of the pin (43).

3. The electromagnetically shielded vacuum plug structure according to claim 2, characterized in that: The conductive connector (4) is disposed in the mounting cavity and is axially fastened and assembled through the stepped structure two, and the stepped structure two includes: The step (11) disposed inside the outer shell (1) cooperates with the outer periphery of the insulator (41) to achieve the fastening of the insulator (41) and the outer shell (1); The step three (26) disposed inside the outer shell two (2) cooperates with the outer periphery of the insulator two (42) to achieve the fastening of the insulator two (42) and the outer shell two (2).

4. The electromagnetically shielded vacuum plug structure according to claim 1 or 3, characterized in that: The outer shell 2 (2) is connected and locked to the outer shell 1 (1) by a vacuum screw 1 (24).

5. The electromagnetically shielded vacuum plug structure according to claim 4, characterized in that: The outer shell 1 (1) also has a step 2 (12) inside which cooperates with one end of the outer shell 2 (2) to achieve fastening.

6. The electromagnetically shielded vacuum plug structure according to claim 5, characterized in that: One end of the outer casing (2) is provided with a wire outlet hole (34), and one end of the outer casing (2) is provided with a wire harness clamping part (3) that fixes and locks the wire harness in the wire outlet hole (34) and forms a circumferential shield.

7. The electromagnetically shielded vacuum plug structure according to claim 6, characterized in that: The wire harness clamping part (3) locks and fixes the wire harness by means of screw locking, nut tightening, heat shrink locking, and cable tie locking.

8. The electromagnetically shielded vacuum plug structure according to claim 7, characterized in that: It also includes a second vacuum screw (25) for securing the vacuum plug structure, consisting of a first housing (1) and a second housing (2), to an external vacuum connector. The second vacuum screw (25) is disposed on the vacuum plug structure.

9. The electromagnetically shielded vacuum plug structure according to claim 8, characterized in that: The two ends of the pin (43) are respectively: a terminal (431) inserted into the second insulator (42) for connecting to the wire, and a plug-in terminal (432) inserted into the first insulator (41) for plugging and unplugging the conductive pins of other connectors.

10. The electromagnetically shielded vacuum plug structure according to claim 9, characterized in that: The outer surface of the outer shell (2) is provided with anti-slip texture (23).

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