TW201812803A - Electromagnetic drive structure featuring tandem cores forming a tandem of cores by adding more than one auxiliary cores between the stationary core and the driving core - Google Patents

Abstract

Conventional electromagnetic drive structures rely on magnetic field generated by a coil to drive a control structure of a core, they are usually used in mechanical control and industrial valves such as solenoid valves. The actuation mechanism of conventional electromagnetic drive structures is analyzed as follows: when the power is turned on, the magnetic field generated by the coil causes a stationary core to attract a driving core which then drives a sliding shaft core and compresses a spring to change the position of the sliding shaft core. When the power is turned off, the driving core is pushed back by the spring to bring the sliding shaft core back to its original position. Accordingly, the displacement of the sliding shaft core can be used for control purposes. However, because the attractive force between the cores decays rapidly with the increasing distance, these electromagnetic drive structures can only be applied in a short ranged working environment and impose a relatively significant limitation on applications. In order to improve the above problem, the tandem-core electromagnetic drive structure according to this invention forms a tandem of cores by adding more than one auxiliary cores between the stationary core and the driving core. Because the working range is distributed over the cores, the distances among the cores are reduced to increase the thrust and shorten the operation time.

Description

   Iron core tandem electromagnetic drive structure   

The present invention relates to an iron core tandem electromagnetic drive structure, and more particularly to an electromagnetic drive structure that increases thrust by increasing the number of cores and reducing the distance between the cores.

According to the general electromagnetic drive structure is a structure that relies on the power supply coil to generate a magnetic field to drive the iron core. It is usually used in mechanical control and industrial valves, such as solenoid valves.

Analyze the operating mechanism of the traditional electromagnetic drive structure. When the power is applied, the coil generates a magnetic field, which causes the fixed iron core to attract the driving iron core. The driving iron core drives the sliding shaft core and compresses the spring, and changes the position of the sliding shaft core. The action of the spring pushes the driving iron core to bring the sliding shaft core back to the original position; thereby, the purpose of controlling the displacement of the sliding shaft core can be achieved.

However, because the attractive force between the iron cores will rapidly decay with increasing distance, this type of electromagnetic drive structure can only be applied to short-travel working environments, which limits its application scope.

The main object of the present invention is to solve the problem of rapid attenuation of thrust caused by the increase in the distance between the cores in the prior art, and has the effect of increasing the attraction between the cores and shortening the operating time.

In order to achieve the above-mentioned effects, the structural features of the present invention include: a cavity with a fixed iron core and a space to accommodate the iron core tandem group; a coil that can generate a magnetic field to drive the iron core tandem group ; An iron core tandem group is set at the position where the magnetic field of the coil faces the fixed iron core. The tail end is the driving iron core. There is more than one auxiliary iron core between the fixed iron core and the driving iron core. The cavity and the fixed iron core and The auxiliary iron core has a hollow hole for the sliding shaft core to pass through. One end of the sliding shaft core is pivotally connected to the driving iron core, and the other end passes through the iron cores to form a series. An elastic body is arranged between the iron cores to keep the separated state. When energized, the cores attract each other and compress the elastic body due to the excitation effect. The driving core is moved closer to the fixed core by the attraction of the auxiliary core. The sliding core is driven by the driving core to change its position. The role of the elastic body separates the iron cores, the driving iron core is pushed away from the fixed iron core by the auxiliary iron core, and the sliding shaft core is driven back to the original position by the driving iron core; through the above combination, the displacement of the sliding shaft core can be used To achieve the purpose of control, and Cores dispersed among the stroke, the distance between the iron core is reduced, it has an increased thrust effect to shorten the time of actuation.

10‧‧‧ Cavity

11‧‧‧ fixed iron core

111‧‧‧ Kong Dao

12‧‧‧ stopper

13‧‧‧ Kong Dao

20‧‧‧coil

30‧‧‧Iron Core Tandem Group

31‧‧‧Drive iron core

311‧‧‧Threaded hole

32‧‧‧ auxiliary iron core

321‧‧‧ Kong Dao

33‧‧‧Slip shaft core

331‧‧‧Screw

332‧‧‧e Buckle

34‧‧‧e buckle

35‧‧‧Spring

Figure 1 is a perspective view of a preferred embodiment of the present invention

Figure 2 An exploded view of a preferred embodiment of the present invention

Fig. 3 is a sectional perspective view of a power-off state of a preferred embodiment of the present invention

Fig. 4 is a sectional perspective view of a power-on state of a preferred embodiment of the present invention

Fig. 5 is a sectional side view of a power-off state of a preferred embodiment of the present invention

Fig. 6 is a sectional side view of a power-on state of a preferred embodiment of the present invention

First, please refer to FIGS. 1 and 2. The preferred embodiment of the present invention includes a cavity 10 with a fixed iron core 11 therein, and a space for accommodating the iron core series 30. A plug 12 is provided to form a semi-enclosed space; a coil 20 can generate a magnetic field to drive the core series 30; a core series 30 is arranged in the direction of the magnetic field of the coil 20 toward the fixed core 11; the tail end is The driving iron core 31 is provided with three auxiliary iron cores 32 between the fixed iron core 11 and the driving iron core 31. The cavity 10 and the fixed iron core 11 and the auxiliary iron core 32 have holes 13 and 111 and 321 for sliding. The shaft core 33 passes through, one end of the sliding shaft core 33 has a screw thread 331 pivotally connected to the threaded hole 311 of the driving iron core 31, and the other end of the sliding shaft core 33 passes through the holes of the auxiliary iron core 32 and the fixed iron core 11 and the cavity 10 321 is formed in series with the holes 111 and 13, and a spring 34 is provided between each core to maintain a separated state.

Based on the above structure, please refer to FIG. 3 to FIG. 6 again, and explain the operation mechanism of the present invention as follows.

When energized, the fixed core 11 and the auxiliary core 32 and the driving core 31 are attracted to each other and the compression spring 34 is attracted by the excitation of the coil 20. The driving core 31 is attracted to the fixed core 11 by the auxiliary core 32 and slides. The shaft core 33 is driven to change its position by the driving iron core 31.

When the power is cut off, the cores are separated by the action of the spring 34, the driving core 31 is pushed away from the fixed core 11 by the auxiliary core 32, and the sliding shaft core 33 is driven back to the original position by the driving core 31.

By the above combination, the purpose of controlling the displacement of the sliding shaft core 33 can be achieved.

There are two other points worth explaining:

I. Miniature solenoid valves often used for mechanical control. In order to facilitate processing and reduce the volume, the cavity is designed to be open so that the driving core is partially exposed. Therefore, in this embodiment, the plug 12 can also be removed to make the cavity 10 inside. An open space is used, and the e-lock 35 is used to buckle the e-lock groove 332 of the sliding shaft core 33 to locate the iron core series 30 so as not to fall apart.

2. In some electromagnetic driving structures that require large thrust, a cavity 10 made of a magnetically conductive material can also be used in combination with the fixed iron core 11 to increase the strength of the magnetic field.

In summary, the structure disclosed in the present invention is unprecedented, and it can indeed achieve the improvement of efficacy, and it can be used in industry, and fully meets the requirements of invention patents. Innovation, no sense of virtue.

Claims (3)

    An iron core tandem electromagnetic drive structure includes: a cavity with a fixed iron core inside, and a space to accommodate the iron core tandem group; a coil that generates a magnetic field to drive the iron core tandem group; An iron core tandem group is arranged at the position where the magnetic field of the coil faces the fixed iron core. The tail end is the driving iron core. There is more than one auxiliary iron core between the fixed iron core and the driving iron core. The cavity and the fixed iron core and the auxiliary The hollow core has a hole for the sliding shaft core to pass through. One end of the sliding shaft core is pivotally connected to the driving core, and the other end passes through the cores to form a series. Elastic bodies are arranged between the cores to keep them separated. At this time, due to the excitation, each core attracts each other and compresses the elastic body. The driving core is moved closer to the fixed core by the attraction of the auxiliary core. The position of the sliding shaft core is changed by the driving core. The body action separates each iron core, the driving iron core is pushed away from the fixed iron core by the auxiliary iron core, and the sliding shaft core is driven back to the original position by the driving iron core. By the above combination, the displacement of the sliding shaft core can be achieved The purpose of control and will work Dispersed among the cores, the distance between the iron core is reduced, so that it has an increased thrust effect to shorten the time of actuation.         According to the iron core tandem electromagnetic driving structure described in item 1 of the scope of the patent application, the cavity is made of magnetically permeable material and combined with a fixed iron core to increase the strength of the magnetic field.         The iron core tandem electromagnetic drive structure described in item 1 of the scope of the patent application, wherein the iron core is replaced by other conductive magnets to achieve the same effect.