Cold-pressing welding-free type non-magnetic cable connector

Abstract

The utility model discloses a cold-pressing welding-free type non-magnetic cable connector, relates to the technical field of connectors, and solves the problem of high assembly difficulty caused by the fact that a connector in the prior art needs to depend on a non-magnetic welding technology during cable connection. The cable connector comprises a central shell, a connecting shell is rotatably arranged at the front end of the central shell, an inner conductor is arranged in the central shell, a plug-in structure is arranged at the end part of the inner conductor, and the inner conductor is in plug-in fit with a cable inner core through the plug-in structure; an elastic clamping mechanism is arranged at the rear end of the central shell, the elastic clamping mechanism is matched with a cable sheath, and an adjusting shell used for adjusting the clamping degree of the elastic clamping mechanism is arranged on the central shell. According to the connector, the inner conductor is connected with the inner core of the cable through the plugging structure, the sheath of the cable is clamped and fixed through the elastic clamping mechanism, reliable connection between the connector and the cable is achieved, the prior art such as welding and bonding is not needed, the assembly efficiency and maintainability between the connector and the cable are improved, and the assembly difficulty and the maintenance cost are reduced.

Description

Technical Field

[0001] This utility model relates to the field of connector technology, and in particular to a cold-pressed, solderless, non-magnetic cable connector. Background Technology

[0002] With the continuous advancement of focused research in the field of quantum computing both domestically and internationally, non-magnetic cable assemblies for quantum superconducting systems play a crucial role in interconnecting radio frequency signals between different cryogenic zones in dilution refrigerators. The extremely low magnetism of these cable assemblies (relative permeability of the material ≤1.0005) is a key foundation for the effective and reliable transmission of microwatt-sized signals in ultra-low temperature environments. Currently, the technological status of non-magnetic cable assemblies both domestically and internationally is as follows: 1. Inner and outer conductor welding connection technology: The inner and outer conductors of the connector are connected and fixed to the cable core and outer shield respectively using non-magnetic welding technology. 2. Inner conductor plug-in and outer conductor welding connection technology: The inner conductor of the connector achieves reliable contact with the cable core through flexible plug-in interconnection technology, while the outer conductor is connected and fixed to the cable outer shield using non-magnetic welding technology. Current assembly methods for non-magnetic cable assemblies all involve non-magnetic welding technology, which is characterized by high assembly costs and complex assembly processes.

[0003] For example, Chinese invention patent CN106099398A discloses a radio frequency coaxial semi-rigid cable assembly and its assembly method, including a radio frequency coaxial connector, a semi-rigid cable, and conductive adhesive; the radio frequency coaxial connector and the semi-rigid cable are fixed by adhesive bonding; the assembly method includes the following steps: 1: Strip the cable core wires, install the insulating sheet, and solder the inner conductor of the connector. 2: Insert the cable with the soldered inner conductor into the connector, and apply conductive adhesive to the connection end of the cable and connector for fixation. 3: Place the fixed cable and connector in an oven for drying. This invention uses adhesive bonding to fix the semi-rigid cable and connector, avoiding the adverse effects on performance caused by the high temperature of soldering.

[0004] In this solution, welding is also used to connect the cable to the inner conductor, and conductive adhesive is used to bond and fix the cable and connector. When used to connect non-magnetic cable assemblies, this existing technology also requires non-magnetic welding and adhesive bonding processes, which makes the connection complex, increases the assembly difficulty, and makes it difficult to disassemble and maintain in case of damage, resulting in low maintainability. Utility Model Content

[0005] To address the shortcomings in the aforementioned background technology, this utility model proposes a cold-pressed, solderless, non-magnetic cable connector, which solves the problem that the existing connectors require non-magnetic soldering technology for cable connection, resulting in high assembly difficulty.

[0006] The technical solution of this utility model is implemented as follows: A cold-pressed, solderless, non-magnetic cable connector includes a central housing, a connecting housing rotatably provided at the front end of the central housing, an inner conductor provided inside the central housing, and a plug-in structure provided at the end of the inner conductor, which is plugged into and cooperates with the inner core of the cable through the plug-in structure; an elastic clamping mechanism is provided at the rear end of the central housing, which cooperates with the outer sheath of the cable, and an adjusting housing is provided on the central housing for adjusting the clamping degree of the elastic clamping mechanism.

[0007] Preferably, an insulator is provided on the inner side of the central housing, and a limiting cylinder that cooperates with the insulator is provided inside the central housing. The limiting cylinder and the limiting step provided inside the central housing together limit the axial position of the insulator.

[0008] Preferably, the inner conductor is provided with a groove Ⅲ that mates with the insulator, and the insertion structure includes a slot provided at the end of the inner conductor, the inner core of the cable is inserted into the opening of the slot, and the opening width of the slot is less than or equal to the outer diameter of the inner core of the cable.

[0009] Preferably, the elastic clamping mechanism includes an elastic spring sleeve and a tightening sleeve that are slidably disposed in the limiting cylinder. The elastic spring sleeve cooperates with the cable sheath, and the adjusting housing cooperates with the tightening sleeve, and can push the tightening sleeve to tighten the elastic spring sleeve onto the cable sheath.

[0010] Preferably, the tightening sleeve has a tapered hole that mates with the elastic spring sleeve; the elastic spring sleeve has a tapered portion that mates with the tapered hole, and the tapered portion has several slots for satisfying elastic contraction.

[0011] Preferably, the adjusting housing is threadedly connected to the central housing, and the inner hole of the adjusting housing mates with the tightening sleeve. The central housing has a groove I, the connecting housing has a groove II, and a retaining ring is provided between the connecting housing and the central housing. The rotatable connection is achieved through the engagement of the retaining ring with grooves I and II.

[0012] Preferably, the central housing, connecting housing, adjusting housing, elastic spring sleeve, limiting cylinder, and tightening sleeve are all coated with a non-magnetic coating. A spacer is fitted on the inner core of the cable, and the spacer is located between the inner conductor and the elastic clamping mechanism.

[0013] Preferably, the outer sides of the central housing, connecting housing, and adjusting housing are all provided with clamping surfaces, and the connecting housing and the front end of the inner conductor form a standard connector interface.

[0014] The beneficial effects of this utility model are as follows: This connector utilizes a plug-in structure to connect the inner conductor to the cable core, and an elastic clamping mechanism to clamp and fix the cable sheath, achieving a reliable connection between the connector and the cable. This eliminates the need for existing technologies such as welding and bonding, improving the assembly efficiency and maintainability of the connector and cable, and reducing assembly difficulty and maintenance costs. Furthermore, by setting a central housing, a supporting foundation is provided for the inner conductor and the elastic clamping mechanism. An adjustable housing is provided on the central housing, allowing adjustment of the clamping degree of the elastic clamping mechanism during assembly. A connecting housing facilitates connection during actual use. This connector has a reliable structure, requires no non-magnetic welding process, and has a simple assembly process that is easy to maintain. Attached Figure Description

[0015] To more clearly illustrate the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the cross-sectional structure of the present invention in its assembled state;

[0017] Figure 2 This is a cross-sectional structural diagram of the central shell, connecting shell, inner conductor, and limiting cylinder of this utility model;

[0018] Figure 3 This is a schematic cross-sectional view of the adjusting housing and elastic clamping mechanism of this utility model;

[0019] Figure 4 This is a schematic diagram of the insulator structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the partition structure of this utility model;

[0021] Figure 6 This is a schematic diagram of the inner conductor and the insertion structure of this utility model;

[0022] Figure 7 This is a schematic diagram of the first type of elastic spring sleeve structure of this utility model;

[0023] Figure 8 This is a schematic diagram of the second type of elastic spring sleeve structure of this utility model;

[0024] Figure 9 This is a schematic diagram of the tightening sleeve structure of this utility model.

[0025] In the figure: 1: central shell, 2: connecting shell, 3: inner conductor, 4: plug-in structure, 5: cable inner core, 6: elastic clamping mechanism, 7: cable outer sheath, 8: adjusting shell, 11: groove I, 12: groove II, 13: retaining ring, 14: insulator, 15: limiting cylinder, 31: groove III, 61: elastic spring sleeve, 62: tightening sleeve, 611: tapered part, 612: slot, 9: spacer. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] like Figure 1 , 2 As shown in Figure 3, in Embodiment 1, a cold-pressed, solderless, non-magnetic cable connector includes a central housing 1, which provides a supporting connection base for other components of the connector. A connecting housing 2 is rotatably mounted at the front end of the central housing 1. An inner conductor 3 is located inside the central housing 1, and a plug-in structure 4 is provided at the end of the inner conductor 3, which plugs into the inner core 5 of the cable. An elastic clamping mechanism 6 is provided at the rear end of the central housing 1, which cooperates with the outer sheath 7 of the cable. An adjusting housing 8 is provided on the central housing 1 for adjusting the clamping degree of the elastic clamping mechanism 6.

[0028] During assembly, the connector is first connected to the central housing, and the inner conductor is installed on the central housing. Then, the elastic clamping mechanism 6 is aligned with the cable sheath 7, and the elastic clamping mechanism 6 is connected to the central housing 1 after engaging with the adjusting housing 8. Simultaneously, the cable core 5 is inserted into the plug-in structure at the end of the inner conductor. The clamping degree of the elastic clamping mechanism 6 is adjusted using the adjusting housing to complete the assembly. In this embodiment, the plug-in structure connects the inner conductor to the cable core, and the elastic clamping mechanism clamps and fixes the cable sheath, achieving a reliable connection between the connector and the cable. This connector has a simple and reliable structure, eliminating the need for existing processes such as non-magnetic soldering and bonding. The assembly process is simple and easy to maintain, improving the assembly efficiency and maintainability between the connector and the cable, and reducing assembly difficulty and maintenance costs.

[0029] As a further specific implementation, in this embodiment, the front ends of the connecting housing 2 and the inner conductor 3 form a connector standard interface. The standard interface can be a conventional standard SMA, 2.92, or other conventional standard interfaces, allowing for connection and fixation with the standard female connector on the field adapter housing during actual use. Specifically, the outer wall of the connecting housing 2 is hexagonal, with the hexagonal face serving as a clamping surface for easy tightening with a wrench. A chamfer is provided on the end face of the connecting housing to remove burrs. The connecting housing has internal threads for locking with the external threads of the field standard female connector. The front end of the inner conductor is rounded for insertion into the inner hole of the standard female connector.

[0030] In addition, a groove I11 is provided on the outer side wall of the central housing 1. In this embodiment, steps are formed on both sides of the groove I11, and the steps are clearance-fitted with the inner side wall of the connecting housing 2. A groove II12 is provided inside the connecting housing 2, and a retaining ring 13 is provided between the connecting housing 2 and the central housing 1. The rotatable connection between the connecting housing and the central housing is achieved by the engagement of the retaining ring 13 with the grooves I11 and II12. Specifically, the retaining ring 13 is press-fitted with the groove I11, and the retaining ring 13 is rotatably engaged with the groove II12, thereby ensuring that the connecting housing 2 rotates on the central housing 1 without falling off.

[0031] Example 2: A cold-pressed, solderless, non-magnetic cable connector, based on Example 1, has an insulator 14 on the inner side of the central housing 1, and a limiting cylinder 15 that cooperates with the insulator 14 inside the central housing 1. In this example, a limiting step is provided inside the central housing 1. When the assembly is completed, the position of the adjusting housing 8 is locked to the elastic clamping mechanism 6, and the limiting cylinder 15 is pushed axially by the elastic clamping mechanism 6, thereby pressing the insulator 14 against the limiting platform. The limiting cylinder 15 and the limiting step together limit the axial position of the insulator 14.

[0032] In this embodiment, as Figure 4 As shown, insulator 14 is cylindrical in shape with a through-hole in the center to accommodate the inner conductor. The insulator can be made of plastic materials such as PEEK and is machined. Its main function is to support and fix the inner conductor, ensuring the coaxiality of the inner conductor and the central shell. In practical use, impedance matching of the connector components can be achieved using HFSS simulation software. Furthermore, depending on the type of plastic used, connector impedance can be matched through optimization methods such as material removal. When optimizing insulator impedance by removing material, through-holes can be evenly spaced along the outer side of the central through-hole to optimize impedance.

[0033] As a further specific implementation method, such as Figure 6As shown, the inner conductor 3 has a groove Ⅲ31 that mates with the insulator 14. The insertion structure 4 includes a slot 41 at the end of the inner conductor 3. The cable core 5 is inserted into the opening of the slot 41, and the opening width of the slot 41 is less than or equal to the outer diameter of the cable core 5, thereby clamping the cable core. Specifically, in this embodiment, the slot 41 is a rectangular opening slot at the end of the inner conductor. A chamfer can be optionally provided at the entrance of the slot to guide the cable core when it is inserted into the slot. When the cable core is inserted into the slot, pressure is applied to the cable core from both sides of the slot to achieve the insertion connection. Further, an arc-shaped groove can be provided on both sides of the center of the slot. When the cable core is inserted, it mates with the arc-shaped groove to achieve centering of the cable core.

[0034] Example 3: A cold-pressed, solderless, non-magnetic cable connector. Based on Example 1, the elastic clamping mechanism 6 includes an elastic spring sleeve 61 and a tightening sleeve 62 that are slidably disposed in the limiting cylinder 15. The elastic spring sleeve 61 cooperates with the cable sheath 7, and the adjusting housing 8 cooperates with the tightening sleeve 62, and can push the tightening sleeve 62 to tighten the elastic spring sleeve 61 onto the cable sheath 7.

[0035] Specifically in this embodiment, such as Figure 9 As shown, the tightening sleeve 62 has a tapered hole that mates with the elastic spring sleeve 61. The tapered hole is located at one end of the tightening sleeve, and a step is provided on the outer side of the tapered hole. The step is used for axial limiting when it mates with the adjusting housing. The inner hole of the tightening sleeve is slightly larger than the outer diameter of the cable sheath, thus accommodating the cable insertion.

[0036] Correspondingly, such as Figure 7 As shown, the elastic spring sleeve 61 has a tapered portion 611 that mates with the tapered hole, and the tapered portion 611 has several slots 612 for elastic contraction. In this embodiment, four slots are evenly spaced along the circumference of the tapered portion. When the tapered portion is compressed by the tapered hole, it can bend inward, thereby contracting onto the cable sheath and fixing the cable sheath. Optionally, such as Figure 8 As shown, a step is provided on the elastic spring sleeve to achieve axial positioning. Additionally, the limiting cylinder 15 has a stepped inner hole, used to limit the axial positions of both the elastic spring sleeve and the insulator. The axial dimension of the stepped inner hole can be determined using compensation theory and HFSS simulation software in practical applications.

[0037] In this embodiment, the adjusting housing 8 is threadedly connected to the central housing 1. The tightening sleeve 62 passes through the inner hole of the adjusting housing 8, and the step of the tightening sleeve mates with the inner end face of the adjusting housing to achieve axial limiting. When the adjusting housing is rotated, the tightening sleeve is pushed to move along the axis, thereby pushing the end face of the tapered part to abut against the inner step of the limiting cylinder. After the limiting cylinder presses the insulator against the inner step of the central housing, the tapered hole of the tightening sleeve squeezes the tapered part, thereby tightening the tapered part and fixing the cable sheath.

[0038] Example 4, based on Example 3, the central shell 1, connecting shell 2, adjusting shell 8, elastic spring sleeve 61, limiting cylinder 15, and tightening sleeve 62 are all made of copper alloy material, machined and formed, and are all coated with a non-magnetic coating on the outer wall.

[0039] Additionally, in this embodiment, as Figure 5 As shown, a spacer 9 is fitted onto the inner core 5 of the cable, and the spacer 9 is located between the inner conductor 3 and the elastic clamping mechanism 6. The spacer 9 can be made of plastic materials such as PEEK and is machined. The main function of the spacer is to separate the cable outer sheath from the inner conductor, preventing the cable outer sheath from directly contacting the inner conductor and causing a short circuit.

[0040] In addition, clamping surfaces are machined on the outer sides of the central housing 1 and the adjusting housing 8 to facilitate clamping with a wrench during assembly.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cold-pressed, solderless, non-magnetic cable connector, characterized in that: The device includes a central housing (1), a connecting housing (2) rotatably provided at the front end of the central housing (1), an inner conductor (3) provided inside the central housing (1), a plug-in structure (4) provided at the end of the inner conductor (3), and a plug-in connection with the inner core (5) of the cable through the plug-in structure (4); an elastic clamping mechanism (6) is provided at the rear end of the central housing (1), the elastic clamping mechanism (6) cooperates with the outer sheath (7) of the cable, and an adjusting housing (8) is provided on the central housing (1) for adjusting the clamping degree of the elastic clamping mechanism (6).

2. The cold-pressed, solderless, non-magnetic cable connector according to claim 1, characterized in that: An insulator (14) is provided inside the central housing (1), and a limiting cylinder (15) that cooperates with the insulator (14) is provided inside the central housing (1). The limiting cylinder (15) and the limiting step provided inside the central housing (1) together restrict the axial position of the insulator (14).

3. The cold-pressed, solderless, non-magnetic cable connector according to claim 2, characterized in that: The inner conductor (3) is provided with a groove Ⅲ (31) that cooperates with the insulator (14). The plug-in structure (4) includes a split groove (41) provided at the end of the inner conductor (3). The inner core of the cable (5) is inserted at the opening of the split groove (41), and the opening width of the split groove (41) is less than or equal to the outer diameter of the inner core of the cable (5).

4. The cold-pressed, solderless, non-magnetic cable connector according to claim 2 or 3, characterized in that: The elastic clamping mechanism (6) includes an elastic spring sleeve (61) and a tightening sleeve (62) that are slidably disposed in the limiting cylinder (15). The elastic spring sleeve (61) cooperates with the cable sheath (7), and the adjusting housing (8) cooperates with the tightening sleeve (62) and can push the tightening sleeve (62) to tighten the elastic spring sleeve (61) onto the cable sheath (7).

5. The cold-pressed, solderless, non-magnetic cable connector according to claim 4, characterized in that: The tightening sleeve (62) is provided with a tapered hole that mates with the elastic spring sleeve (61); the elastic spring sleeve (61) is provided with a tapered part (611) that mates with the tapered hole, and the tapered part (611) is provided with a number of slots (612) for satisfying elastic contraction.

6. The cold-pressed, solderless, non-magnetic cable connector according to claim 5, characterized in that: The adjusting housing (8) is threadedly connected to the central housing (1), and the inner hole of the adjusting housing (8) is matched with the tightening sleeve (62).

7. The cold-pressed, solderless, non-magnetic cable connector according to claim 6, characterized in that: The central housing (1) is provided with groove I (11), the connecting housing (2) is provided with groove II (12), and a retaining ring (13) is provided between the connecting housing (2) and the central housing (1). The rotatable connection is achieved by the cooperation of the retaining ring (13) with groove I (11) and groove II (12).

8. The cold-pressed, solderless, non-magnetic cable connector according to claim 7, characterized in that: The central housing (1), connecting housing (2), adjusting housing (8), elastic spring sleeve (61), limiting sleeve (15), and tightening sleeve (62) are all coated with a non-magnetic coating.

9. The cold-pressed, solderless, non-magnetic cable connector according to any one of claims 1-3 and 5-8, characterized in that: A spacer (9) is fitted on the inner core (5) of the cable, and the spacer (9) is located between the inner conductor (3) and the elastic clamping mechanism (6).

10. The cold-pressed, solderless, non-magnetic cable connector according to claim 9, characterized in that: The outer sides of the central housing (1), connecting housing (2), and adjusting housing (8) are all provided with clamping surfaces, and the front end of the connecting housing (2) and the inner conductor (3) form a connector standard interface.

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