High stability coaxial switch

Abstract

The utility model relates to coaxial switch technical field especially a kind of high-stability coaxial switch, including shell body, the top of shell body is inserted and is connected with top cover, the top of top cover is equipped with speed reducer by bolt, the input shaft of the top of speed reducer is equipped with stepper motor by shaft coupling, the output shaft of speed reducer is fixedly installed and is passed through the bottom of top cover and is equipped with transmission gear disc, the bottom of shell body inner chamber is equipped with rotating assembly by bearing, the rotating assembly includes rotating lever.Step motor is driven to install rotating plate rotation by speed reducer, electrically-conductive contact rod synchronous rotation, contact with the fixed contact in elastic conductive insert shell, realize the signal conduction between corresponding coaxial connector, such that it can accurately control rotation angle, and then realize the accurate butt joint between contact, reduce the loss when signal switching, control module can be accurately controlled to stepper motor, improve overall switching reliability.

Description

Technical Field

[0001] This utility model relates to the field of coaxial switch technology, specifically a high-stability coaxial switch. Background Technology

[0002] Coaxial switches are key switching devices in radio frequency / microwave systems. They adjust the microwave transmission path by changing the direction of the magnetic field or the electrical signal to achieve functions such as channel switching and pulse modulation. They are widely used in communications, radar, test and measurement and other fields.

[0003] A search revealed that the announcement number is CN222300822U, and the name is "A Radio Frequency Coaxial Switch," which includes a bracket with a housing fixed on one side. Through research and analysis, it was found that although this invention improves switching efficiency by rotating a rotating guide assembly set inside the housing to connect to the ferrules inside the four output interfaces, thereby enabling simultaneous connection to the antennas connected to the four output interfaces, the following defects still exist to a certain extent.

[0004] For example, the switching accuracy is poor. The above coaxial switch only controls the rotation of the rotating conductor by a motor, which cannot accurately control the rotation angle. The moving contact and the fixed contact cannot be precisely connected, resulting in poor overall switching stability. At the same time, it has poor environmental adaptability, poor sealing and dust prevention and heat dissipation, which affects the internal electrical performance. Moreover, it cannot keep the inside dry, which further affects stability. In order to solve the above technical problems, we have designed a high-stability coaxial switch. Utility Model Content

[0005] The purpose of this invention is to provide a highly stable coaxial switch with advantages such as high switching accuracy, reduced signal switching loss, improved overall switching reliability, strong environmental adaptability, excellent sealing, heat dissipation and moisture-proof performance, and further improved stability. It solves the problems of poor switching accuracy, inaccurate contact alignment, poor overall switching stability, and inadequate sealing, heat dissipation and moisture-proof performance, which further affect the internal electrical stability.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-stability coaxial switch, comprising a housing, a top cover inserted into the top of the housing, a reducer bolted to the top of the top cover, a stepper motor mounted on the input shaft of the reducer via a coupling, an output shaft of the reducer extending through the bottom of the top cover and fixedly mounted with a transmission gear plate, a rotating assembly mounted on the bottom of the inner cavity of the housing via a bearing, the rotating assembly comprising a rotating rod, a transmission gear ring welded to the top of the rotating rod, a mounting plate welded to the surface of the rotating rod, a conductive contact rod fixedly mounted on the outer side of the mounting plate, elastic conductive inserts fixedly connected to the side walls of the inner cavity of the housing, a moisture-proof pad adhered to the side walls of the inner cavity of the housing, a heat-conducting plate extending through the bottom of the inner cavity of the housing, heat dissipation fins welded to the bottom of the heat-conducting plate, and coaxial connectors fixedly mounted on the outer side walls of the inner cavity of the housing.

[0007] Preferably, positioning inserts are fixedly installed on the top of the four side walls of the outer shell, and positioning plates are fixedly installed on the four side walls of the top cover.

[0008] Preferably, a sealing platform is fixedly connected to the top of the outer casing, and a silicone sealing gasket is embedded in the top of the sealing platform.

[0009] Preferably, rubber bases are embedded in the four corners of the bottom of the outer casing, and the metal end inside the coaxial connector is electrically connected to the elastic conductive insert.

[0010] Preferably, a guide block is welded to the bottom of the transmission gear plate, and a guide slot is provided at the top of the rotating rod.

[0011] Preferably, a positioning frame is fixedly installed in the inner cavity of the outer shell, and the surface of the rotating rod is connected to the positioning frame through a bearing.

[0012] Preferably, a control module is bolted to the front side of the top of the cover, and the output of the control module is electrically connected to the stepper motor.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. The stepper motor drives the mounting plate to rotate through the reducer, and the conductive contact rod rotates synchronously, making contact with the fixed contact in the elastic conductive housing, realizing signal conduction between the corresponding coaxial connectors. This allows for precise control of the rotation angle, thereby achieving accurate docking between the contacts, reducing losses during signal switching. The control module can precisely control the stepper motor, improving the overall switching reliability.

[0014] 2. The sealing platform increases the contact area with the moisture-proof pad, and the silicone sealing pad further improves the sealing performance, effectively preventing dust from entering. The heat inside the shell is conducted to the surface of each heat dissipation fin through the heat conduction plate for rapid heat dissipation. The moisture-proof pad attached to the inner wall of the shell absorbs the trace amounts of moisture that may intrude, keeping the interior dry and further improving stability. Attached Figure Description

[0015] Figure 1 This is an axonometric view of the structure of this utility model; Figure 2 This is a top axonometric view of the outer shell of this utility model; Figure 3 This is an exploded view of a partial structure of the present invention; Figure 4 This is a bottom axonometric view of the top cover of this utility model; Figure 5 This is an exploded view of the transmission gear plate and rotating assembly of this utility model; Figure 6 This is a bottom-view axonometric view of the outer shell of this utility model.

[0016] In the diagram: 1. Outer shell; 2. Top cover; 3. Control module; 4. Stepper motor; 5. Reducer; 6. Positioning insert; 7. Coaxial connector; 8. Rubber base; 9. Conductive contact rod; 10. Rotating assembly; 11. Positioning frame; 12. Moisture-proof pad; 13. Silicone sealing gasket; 14. Heat-conducting plate; 15. Sealing platform; 16. Elastic conductive insert; 17. Positioning plate; 18. Guide block; 19. Transmission gear plate; 20. Mounting rotating plate; 21. Rotating rod; 22. Transmission gear ring; 23. Guide slot; 24. Heat dissipation fins. Detailed Implementation

[0017] Please see Figures 1-6A high-stability coaxial switch includes a housing 1 made of aluminum alloy with an integrally formed mounting cavity. A top cover 2 is inserted and installed on the top of the housing 1. A reducer 5 is bolted to the top of the top cover 2. A stepper motor 4 is mounted on the input shaft of the reducer 5 via a coupling. The output shaft of the reducer 5 extends to the bottom of the top cover 2 and is fixedly mounted with a transmission gear 19. The number of teeth on the transmission gear 19 is the same as the number of tooth slots on the transmission gear ring 22, and they are meshed. A rotating assembly 10 is mounted on the bottom of the inner cavity of the housing 1 via a bearing. The rotating assembly 10 includes a rotating rod 21. A transmission gear ring 22 is welded to the top of the rotating rod 21. A mounting plate 20 is welded and sleeved on the surface of the rotating rod 21. A mounting plate 20 is fixedly mounted on the outer side of the mounting plate 20. The device has a conductive contact rod 9. The contacts on the surface of the conductive contact rod 9 and the contacts inside the elastic conductive plug shell 16 are both made of silver alloy. The contact surfaces of both are plated with a gold-nickel alloy layer with a thickness of 5-8μm to improve the anti-oxidation performance. The side walls of the inner cavity of the outer shell 1 are all fixedly connected to the elastic conductive plug shell 16. The side walls of the inner cavity of the outer shell 1 are attached to the moisture-proof pad 12, which is a non-woven fabric bag filled with silica gel desiccant. The size is adapted to the inner wall of the outer shell 1 and is tightly attached by high temperature resistant adhesive. It can be replaced periodically. A heat-conducting plate 14 is installed through the bottom of the inner cavity of the outer shell 1. The bottom of the heat-conducting plate 14 is welded with heat dissipation fins 24. Both the heat-conducting plate 14 and the heat dissipation fins 24 are made of aluminum alloy. The outer sides of the side walls of the outer shell 1 are all fixedly installed with coaxial connectors 7. Please see Figure 2 and Figure 4 The top of the four sides of the outer shell 1 is fixedly installed with positioning insert shells 6. The outer shell of the positioning insert shell 6 has a snap-fit ​​opening. The side walls of the top cover 2 are fixedly installed with positioning insert plates 17. The outer side of the positioning insert plate 17 is integrally formed with snap-fit ​​protrusions. By setting the positioning insert shells 6 and positioning insert plates 17, the traditional bolt connection can be replaced, and the outer shell 1 and the top cover 2 can be quickly disassembled and assembled, which facilitates the inspection or maintenance of internal components and reduces the later maintenance cost. Please see Figure 3 A sealing platform 15 is fixedly connected to the top of the outer shell 1. A groove is provided on the top of the sealing platform 15 to facilitate the fixed installation of the silicone sealing gasket 13. The silicone sealing gasket 13 is embedded in the top of the sealing platform 15. Please see Figure 2 and Figure 6 Rubber bases 8 are embedded in the four corners of the bottom of the outer shell 1. By setting the rubber bases 8, the bottom of the outer shell 1 can be prevented from directly contacting the mounting surface, thus providing support and protection. The metal end inside the coaxial connector 7 is electrically connected to the elastic conductive insert 16. Please see Figure 5The bottom of the transmission gear plate 19 is welded with a guide block 18, and the top of the rotating rod 21 is provided with a guide slot 23. By setting the guide slot 23, the guide block 18 can be inserted into it first when installing the top cover 2, so as to guide the installation and facilitate the meshing installation between the transmission gear plate 19 and the transmission gear ring 22. Please see Figure 2 and Figure 5 The inner cavity of the outer shell 1 is fixedly installed with a positioning frame 11, which is made of polytetrafluoroethylene and can provide stable support for the rotating component 10. The surface of the rotating rod 21 is installed through the positioning frame 11 via a bearing. Please see Figure 1 The control module 3 is bolted to the front side of the top of the top cover 2, and the output end of the control module 3 is electrically connected to the stepper motor 4.

[0018] In use, the external control system sends control commands to the control module 3 via an RS485 interface. The driver built into the control module 3 drives the stepper motor 4 to rotate. The stepper motor 4 drives the transmission gear plate 19 to rotate via the reducer 5. The transmission gear plate 19 drives the mounting plate 20 on the rotating rod 21 to rotate via the transmission gear ring 22. The conductive contact rod 9 rotates synchronously and contacts the fixed contact point inside the target elastic conductive housing 16, realizing signal conduction between the corresponding coaxial connectors 7. By using the stepper motor 4 in conjunction with the reducer 5, the rotation angle can be precisely controlled, thereby achieving precise docking between contacts and reducing losses during signal switching. The control module 3 can precisely control the stepper motor 4, improving the overall switching reliability. A sealing platform 15 is set on the top of the housing 1, which can increase the contact area with the top cover 2. At the same time, a silicone sealing gasket 13 is set between the sealing platform 15 and the top cover 2, which can further improve the sealing performance and effectively prevent dust from entering. A heat-conducting plate 14 and heat dissipation fins 24 are set at the bottom of the housing 1, which can allow the heat inside the housing 1 to be conducted to the surface of each heat dissipation fin 24 through the heat-conducting plate 14 for rapid heat dissipation. The moisture-proof pad 12 attached to the inner wall of the housing 1 absorbs the intruding trace amount of moisture, keeps the inside dry, and further improves stability.

[0019] In summary, this high-stability coaxial switch, through the coordinated use of the housing 1, top cover 2, stepper motor 4, reducer 5, rotating component 10, moisture-proof pad 12, silicone sealing gasket 13, heat-conducting plate 14, sealing platform 15, and heat dissipation fins 24, solves the problems of poor switching accuracy, inaccurate contact alignment, poor overall switching stability, and inadequate sealing, heat dissipation, and moisture-proof effects, which further affect the internal electrical stability.

Claims

1. A high-stability coaxial switch, comprising a housing (1), characterized in that: A top cover (2) is inserted into the top of the outer shell (1). A reducer (5) is bolted to the top of the top cover (2). A stepper motor (4) is mounted on the input shaft of the reducer (5) via a coupling. The output shaft of the reducer (5) extends through to the bottom of the top cover (2) and is fixedly mounted with a transmission gear plate (19). A rotating assembly (10) is mounted on the bottom of the inner cavity of the outer shell (1) via a bearing. The rotating assembly (10) includes a rotating rod (21). A transmission gear ring (22) is welded to the top of the rotating rod (21). The rotating rod (21) is welded with a mounting plate (20). A conductive contact rod (9) is fixedly installed on the outer side of the mounting plate (20). Elastic conductive inserts (16) are fixedly connected to the side walls of the inner cavity of the outer shell (1). A moisture-proof pad (12) is attached to the side wall of the inner cavity of the outer shell (1). A heat-conducting plate (14) is installed through the bottom of the inner cavity of the outer shell (1). Heat dissipation fins (24) are welded to the bottom of the heat-conducting plate (14). Coaxial connectors (7) are fixedly installed on the outer side of the side walls of the outer shell (1).

2. The high-stability coaxial switch according to claim 1, characterized in that: The top of the four sides of the outer shell (1) is fixedly installed with a positioning insert (6), and the side walls of the top cover (2) are fixedly installed with a positioning insert (17).

3. A high-stability coaxial switch according to claim 1, characterized in that: A sealing platform (15) is fixedly connected to the top of the outer shell (1), and a silicone sealing gasket (13) is embedded in the top of the sealing platform (15).

4. A high-stability coaxial switch according to claim 1, characterized in that: Rubber bases (8) are embedded in the four corners of the bottom of the outer shell (1), and the metal end inside the coaxial connector (7) is electrically connected to the elastic conductive insert (16).

5. A high-stability coaxial switch according to claim 1, characterized in that: The bottom of the transmission gear plate (19) is welded with a guide block (18), and the top of the rotating rod (21) is provided with a guide slot (23).

6. A high-stability coaxial switch according to claim 1, characterized in that: The inner cavity of the outer shell (1) is fixedly installed with a positioning frame (11), and the surface of the rotating rod (21) is installed through the positioning frame (11) via a bearing.

7. A high-stability coaxial switch according to claim 1, characterized in that: The control module (3) is bolted to the front side of the top of the top cover (2), and the output end of the control module (3) is electrically connected to the stepper motor (4).

Images