CN105552482B - Microwave switch electromagnetic drive device - Google Patents

Abstract

Microwave switch electromagnetic drive device, including two solenoid type electromagnets, rotating shaft bracket and elastic reed, the two solenoid type electromagnets are installed above the support plate, and the guide rod of the solenoid type electromagnets is removed from the support plate Extending, the lower part of the guide rod is respectively connected with the two ends of the rotating shaft bracket, the rotating shaft bracket is fixed on the lug plate below the support plate by the rotating shaft, the rotating shaft bracket can rotate around the rotating shaft, and the two elastic springs are respectively riveted on the two sides of the rotating shaft bracket. end. The microwave switch electromagnetic drive device adopts the electromagnetic drive structure combining "dual solenoid and balanced armature rotation", and uses the principle of laborious lever. Design challenges for microwave switches.

Description

Microwave switch electromagnetic drive device

technical field

The invention relates to a microwave switch electromagnetic drive device.

Background technique

With the rapid development of modern military equipment, the power requirements for microwave devices continue to increase. For microwave switches, the stroke of the movable elastic reed is also increasing with the increase of power. At the same time, in order to improve the mobility of the equipment, the components used in the equipment are developing in the direction of small size, light weight and high reliability. As the key control device of microwave signal transmission and switching processing system, microwave switch must be developed in the above direction. There are two types of electromagnetic drive systems for microwave switches: "balanced armature rotary type" and "solenoid type". The magnetic circuit system of the "balanced armature rotating type" electromagnetic drive system belongs to the open type, and the magnetic leakage of the magnetic circuit is relatively large, resulting in a relatively large volume of the microwave switch. The "solenoid" electromagnetic drive system (patent CN 201310274259.0) has a high utilization rate of magnetic energy and a large stroke of the moving iron core, but the iron core itself has poor impact resistance and vibration performance.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a microwave switch electromagnetic drive device. The microwave switch electromagnetic drive device adopts an electromagnetic drive structure combining "double solenoid and balanced armature rotation", and uses the principle of laborious lever. Under the conditions, the purpose of small size and large stroke is achieved, and the design problem of high-power microwave switches is solved.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical scheme: a microwave switch electromagnetic drive device includes two solenoid type electromagnets, a rotating shaft bracket and an elastic reed, and the two solenoid type electromagnets are installed above the support plate, The guide rod of the solenoid type electromagnet protrudes from the support plate, and the lower part of the guide rod is respectively connected with the two ends of the rotating shaft bracket. When rotated, the two elastic reeds are respectively riveted on both ends of the rotating shaft bracket.

The electromagnetic drive device of the microwave switch of the present invention applies the labor-intensive lever principle, adopts two solenoid electromagnets with a bistable magnetic holding structure, and is fixed by a support plate to form a similar "push-pull" structure. The movement of the iron core in the electromagnet drives the movement of both ends of the rotating shaft bracket, and the elastic reeds riveted at both ends of the rotating shaft bracket (usually in contact with the push rod and other components) move synchronously and transmit force, converting the stroke of the iron core into elastic reeds 's itinerary. Because the electromagnetic drive device of the microwave switch of the present invention uses two bistable solenoid electromagnets to provide holding force at the same time, the holding force is large, and the iron core is placed between the rotating shaft and the elastic reed to form a laborious lever structure, with the rotating shaft as the At the support point, the stroke of the iron core is further enlarged, so as to obtain a larger stroke at the end of the elastic reed. By adjusting the lever ratio in the structure, the same iron core stroke can form different continuous changes at the end of the elastic reed. long trip.

The microwave switch electromagnetic drive device of the present invention effectively utilizes the narrow product cavity space, and can have a larger stroke in the same space compared with a separate "balanced armature rotary" or "solenoid" drive structure As well as higher driving force, it has the characteristics of small structure, long stroke, impact resistance, vibration resistance, etc. The whole assembly process is simple and reliable, and can be disassembled repeatedly.

The solenoid type electromagnet includes an iron core, a coil, a guide rod and a coil bobbin. The coil is wound on the coil bobbin. A number of permanent magnets are fixed between the skeletons, the iron core is sleeved in the sleeve, the axial length of the sleeve is greater than the length of the iron core, and the guide rod passes through both sides of the coil skeleton along the axial direction of the sleeve. It can move up and down along the axial direction of the coil frame, and the guide rod is fixedly connected with the iron core. The iron core can move in the axial direction of the sleeve in the sleeve, the same poles of several permanent magnets are distributed on the outside of the sleeve relatively circumferentially, and the iron core is magnetized by the permanent magnets, so that the iron core moves to the upper end of the sleeve or The limit position of the lower end is fixed at this initial limit position; when the coil is energized, the coil magnetic field is generated in the coil. When the magnetic field of the magnet acts, it drives the iron core to move along the center line of the sleeve to the limit position of the other end of the sleeve. At this time, when the iron core is no longer affected by the magnetic field force of the coil, the iron core will stay at the other end. The limit position of the iron core will not return to the original limit position, the iron core and the guide rod are fixedly connected, and the movement of the iron core drives the guide rod to move up and down, which in turn drives the movement of the elastic reed. There is no need for a spring or other reset device to restore the iron core and the guide rod to the initial state, which simplifies the structure of the entire device.

The iron core of the electromagnet is a cylinder and can be rotated 360°. In order to prevent the iron core from rotating, a tongue is arranged at the lower end of the guide rod, and grooves are arranged at both ends of the shaft bracket. The rotation of the iron core is restricted without affecting the connection.

Description of drawings

FIG. 1 is a schematic diagram of the appearance of a microwave switch electromagnetic drive device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a microwave switch electromagnetic drive device according to an embodiment of the present invention.

Figure 3 is a schematic view of a guide rod.

FIG. 4 is a schematic diagram of a rotating shaft bracket.

FIG. 5 is a schematic diagram of the connection between the guide rod and the rotating shaft bracket.

Detailed ways

Embodiments of the present invention are described in detail below in conjunction with the accompanying drawings:

The microwave switch electromagnetic drive device, as shown in Figure 1-Figure 5, includes two solenoid type electromagnets 1, a rotating shaft bracket 3 and two elastic reeds 5, and the two solenoid type electromagnets 1 are installed on the support plate 2 above, the guide rod 11 of the solenoid type electromagnet 1 protrudes from the support plate 2, the lower end of the guide rod 11 is dug with two notches 11a, there is a tongue 11b between the two notches 11a, the rotating shaft bracket 3 Both ends are provided with two protruding claws 33, a groove 34 is formed between the two protruding claws, and the two protruding claws 33 are respectively located in the two slot holes 11a of the guide rod 11, correspondingly, the protruding tongue 11b of the guide rod 11 It is stuck in the groove 34 of the rotating shaft bracket 3 , so as to connect the guide rod 11 with the rotating shaft support 3 and restrict the rotation of the guide rod 11 . The rotating shaft bracket has a rotating shaft hole 31 in the middle and rivet holes 32 at both ends. The center line of the rotating shaft hole 31 is perpendicular to the center line of the rivet hole 32. The rotating shaft 4 passes through the rotating shaft hole 31 to install the rotating shaft bracket 3 on the support plate 2. On the lower ear plate 21 , the rotating shaft bracket 3 can rotate around the rotating shaft 4 . The two rivets 6 respectively pass through the rivet holes 32 to fix the two elastic spring sheets 5 on both ends of the rotating shaft bracket 3 . When the solenoid electromagnet 1 is energized, the guide rod 11 moves up and down, pushing the elastic reed 5 to rotate, and both ends of the elastic reed 5 move up or down respectively, thereby converting the movement stroke d of the guide rod 11 into an elastic spring Stroke L of sheet 5.

The solenoid electromagnet 1 includes an iron core 12, a coil 15, a guide rod 11 and a coil bobbin 16. The coil 15 is wound on the bobbin 16, and a hollow sleeve 13 is sleeved inside the bobbin 16. The sleeve 13 Six permanent magnets 17 are fixedly placed between the coil bobbin 16, the permanent magnets 17 are arranged opposite to each other with the same pole, the iron core 12 is sleeved in the sleeve 13, and the axial length of the sleeve 13 is greater than the length of the iron core 12 , the guide rod 11 passes through both sides of the coil bobbin 16 along the axial direction of the sleeve 13, the guide rod 11 can move up and down along the axial direction of the coil bobbin 16, the guide rod 11 is fixedly connected with the iron core 12, and the upper part of the coil bobbin 16 has The upper end cover 14 and the lower end cover 18 are provided at the lower part of the coil bobbin 16, and both the upper end cover 14 and the lower end cover 18 are made of magnetically conductive material. The iron core 12 is magnetized by the permanent magnet 17, so that the iron core 17 moves to the limit position of the upper end or the lower end of the sleeve 13, and is fixed at the initial limit position; when the coil 15 is energized, a coil magnetic field is generated in the coil 15, if the coil When the magnetic field is opposite to the magnetic field of the permanent magnet 17, and the coil magnetic field force received by the iron core 12 is greater than the magnetic field force of the permanent magnet 17 received by the iron core 12, the iron core 12 is driven to move along the center line of the sleeve 13 to the sleeve 13 The limit position of the other end inside, when the iron core 12 is no longer affected by the magnetic field force of the coil, the iron core 12 will stay at the limit position and will not return to the initial limit position, and the movement of the iron core 12 drives the guide The rod 11 moves up and down, and then pushes the elastic reed 5 to rotate, thereby converting the movement stroke d of the guide rod 11 into the stroke L of the elastic reed 5, thereby increasing the stroke.

Claims (2)

1. Microwave switch electromagnetic drive device, it is characterized in that: comprise two solenoid type electromagnets, rotating shaft support and elastic reed, two solenoid type electromagnets are installed above the support plate, the solenoid type electromagnets The guide rod protrudes from the support plate, and the lower part of the guide rod is respectively connected with the two ends of the rotating shaft bracket. The rotating shaft support is fixed on the lug plate under the supporting plate by the rotating shaft. Riveted on both ends of the shaft bracket respectively; The solenoid type electromagnet includes an iron core, a coil, a guide rod and a coil bobbin, the coil is wound on the bobbin, a hollow sleeve is sleeved inside the bobbin, and several pieces are fixedly placed between the sleeve and the bobbin. Permanent magnet, the iron core is sleeved in the sleeve, the axial length of the sleeve is greater than the length of the iron core, the guide rod passes through both sides of the coil frame along the axial direction of the sleeve, and the guide rod can be along the axial direction of the coil frame. Moving up and down, the guide rod is fixedly connected with the iron core. 2 . The electromagnetic drive device of a microwave switch according to claim 1 , wherein the lower end of the guide rod is provided with a tongue, the two ends of the rotating shaft bracket are provided with grooves, and the grooves are engaged with the tongues. 3 .