CN207834049U - A kind of self-priming electromagnet of no spring - Google Patents

Abstract

The utility model relates to a springless self-priming electromagnet. The electromagnet includes a skeleton and a coil. The coil is wound on the skeleton. A slide bar assembly is installed in the inner hole of the skeleton. The coil Used to generate a directional magnetic field in the energized state, the slider assembly includes an axially assembled electrical pure iron and a permanent magnet. An attractive force is generated between the shell and the permanent magnet, and the direction of the force between the directional magnetic field and the permanent magnet is opposite to that of the directional magnetic field and the permanent magnet, so as to realize the axial reciprocation of the slider assembly along the inner hole sports. The springless self-priming electromagnet controls the movement of the slider assembly by controlling the on-off state of the input coil and the cooperation of the shell; in addition, the use of permanent magnets makes the working stroke of the slider assembly longer; the structure is simple and easy to manufacture.

Description

A springless self-priming electromagnet

technical field

This invention relates to electromagnets.

Background technique

Commonly used electromagnets in the field of transmission control are used as electro-mechanical conversion mechanisms, and return springs are key components of electromagnets. The electromagnet mandrel slide rod assembly on the existing market is sucked in by the coil when it is energized, and released by the spring when the power is off, so as to correspond to the two working states of the electromagnet: fully open and fully closed. However, this type of electromagnet needs to overcome the spring force to inhale after being energized, which wastes the electromagnetic force of the electromagnet; the spring will cause reliability problems of the electromagnet due to fatigue, fracture, corrosion and other reasons during use, which will affect the use of the electromagnet The life of the electromagnet; the installation method and position of the spring also need to be considered in the design of the electromagnet, which makes the structure of the electromagnet more complicated, the processing cost is high, and the stroke of the electromagnet inevitably becomes smaller.

Contents of the invention

The technical problem to be solved by the present invention is to provide an improved electromagnet without installing a spring.

The technical solution adopted by the present invention to solve the technical problem is: a springless self-priming electromagnet, the electromagnet includes a skeleton and a coil, the coil is wound on the skeleton, and the inner hole of the skeleton A slide bar assembly is installed, and it is characterized in that: the coil is used to generate a directional magnetic field in the energized state, the slide bar assembly includes electrical pure iron and permanent magnets assembled in the axial direction, the skeleton is provided with a shell, and the shell Corresponding to the permanent magnet to generate an attractive force between the permanent magnet and the axial direction, the force between the shell and the permanent magnet is opposite to the direction of the force between the oriented magnetic field and the permanent magnet, In this way, the axial reciprocating movement of the slide bar assembly along the inner hole is realized.

As mentioned above, a springless self-priming electromagnet, the two ends of the inner hole of the skeleton are respectively provided with limiting parts to prevent the sliding bar assembly from detaching.

In the aforementioned springless self-priming electromagnet, the stopper is a raised step for reducing the diameter of the inner hole.

In the aforementioned springless self-priming electromagnet, the shell is arranged at one end of the skeleton.

As a springless self-priming electromagnet as mentioned above, the electric pure iron is hollow columnar.

Implementing the technical solution of the present invention has at least the following beneficial effects: the non-spring self-priming electromagnet cooperates with the casing by controlling the current on-off state of the input coil, thereby controlling the movement of the slide bar assembly; in addition, the permanent magnet is used to make the slide bar The working stroke of the component is longer; the structure is simple and the manufacture is easy.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and embodiment, in the accompanying drawing:

Fig. 1 is a schematic diagram of a coil power-off state according to an embodiment of the present invention;

Fig. 2 is a schematic diagram of a coil energized state according to an embodiment of the present invention;

Fig. 3 is a schematic diagram of power-off of the second coil of the utility model embodiment;

Fig. 4 is a schematic diagram of electrification of the second coil of the utility model embodiment;

The markings in the figure are explained as follows:

1. Skeleton; 10. Inner hole; 11. Raised steps; 2. Coil; 3. Shell; 4. Electrical pure iron; 5. Pins; 6. Permanent magnet.

Detailed ways

In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

A springless self-priming electromagnet as shown in Figure 1-4, the electromagnet includes a skeleton 1, a coil 2, the coil 2 is wound on the skeleton 1, and the inner hole 10 of the skeleton 1 A slide bar assembly is installed in it, and the coil 2 is connected to the chip pin 5 to generate a directional magnetic field in the energized state. The slide bar assembly includes an axially assembled electrical pure iron 4 and a permanent magnet 6. The skeleton 1 There is a shell 3 outside, and the shell 3 corresponds to the permanent magnet 6 to generate an attractive force between the permanent magnet 6 in the axial direction, and the force between the shell 3 and the permanent magnet 6 is the same as the orientation The direction of the force between the magnetic field and the permanent magnet 6 is opposite, so as to realize the axial reciprocating movement of the slider assembly along the inner hole 10 .

Coil 2 has two states of power-on and power-off. After power-on, coil 2 generates a magnetic field force to push the slider assembly; reset. By changing the on-off state of the current in the coil 2, intermittently generating a magnetic field, coupled with the cooperation of the shell 3, the axial reciprocating movement of the slide bar assembly is realized.

As shown in FIG. 1 , when the coil 2 is not energized, the magnetic force generated by the permanent magnet 6 on the slider assembly attracts the housing 3 , so that the permanent magnet 6 drives the slider assembly to move to the position shown in the figure close to the housing 3 . As shown in Figure 2, the magnetic poles generated after the coil 2 is energized repel the magnetic poles of the permanent magnet 6 on the slider assembly with the same sex, forming a reverse magnetic field force, so that the permanent magnet 6 drives the slider assembly to move away from the housing 3 show the location.

As shown in Figure 3, when the coil 2 is not powered, the magnetic force generated by the permanent magnet 6 on the slider assembly is attracted to the housing 3, so that the permanent magnet 6 drives the slider assembly to move to the position shown in the figure close to the housing 3; As shown in FIG. 4 , the magnetic poles generated by the electrification of the coil 2 and the magnetic poles of the permanent magnet 6 on the slider assembly attract each other, so that the permanent magnet 6 drives the slider assembly to move to the position shown in the figure away from the housing 3 .

The shell 3 is arranged at the end of the skeleton 1 in the axial direction, either of the two ends is acceptable, and the manufacturer determines the current direction of the coil 2 according to the position of the shell 3 during production so as to generate a magnetic field in the corresponding direction. As in Embodiment 1 and Embodiment 2, with the permanent magnet 6 as a reference, the casing 3 is arranged at the end close to the permanent magnet 6 in the first embodiment, and the casing 3 is arranged at the end far away from the permanent magnet 6 in the second embodiment. .

In some embodiments, the two ends of the inner hole 10 of the framework 1 are respectively provided with limiting parts to prevent the sliding bar assembly from disengaging. The limiting parts can be raised steps 11 for reducing the diameter of the inner hole 10. The sliding bar assembly is running When reaching the end point of the stroke, it is hindered by the raised step 11 and will not break away from the inner hole 10 .

In some embodiments, the electrical pure iron 4 is hollow columnar, which can reduce the moment of inertia of the electrical pure iron 4 so as to further speed up the response speed of the electromagnet to obtain high dynamic response and meet the needs of high-speed switching of the electromagnet.

The slide bar assembly in the electromagnet of the prior art is only subjected to the independent action of the magnetic field force, but the electromagnet disclosed in the utility model has adopted a permanent magnet (generally a permanent magnet). The magnetic field will generate a mutual magnetic force, and the addition of the two forces makes the working stroke of the slider assembly longer.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications, combinations and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of the claims of the present invention.

Claims (5)

1. A springless self-priming electromagnet, the electromagnet includes a skeleton and a coil, the coil is wound on the skeleton, and a slide bar assembly is installed in the inner hole of the skeleton, it is characterized in that: The coil is used to generate a directional magnetic field in the energized state. The slider assembly includes an axially assembled electrical pure iron and a permanent magnet. An attractive force is generated between the magnets, and the force between the shell and the permanent magnet is opposite to the direction of the force between the directional magnetic field and the permanent magnet, so that the slide bar assembly can move along the axis of the inner hole. to and fro movement. 2. A springless self-priming electromagnet as claimed in claim 1, characterized in that: the two ends of the inner hole of the framework are respectively provided with limiting parts to prevent the sliding bar assembly from detaching. 3. A springless self-priming electromagnet according to claim 2, characterized in that: the limiting part is a raised step for reducing the diameter of the inner hole. 4. A springless self-priming electromagnet according to claim 1, characterized in that: the shell is arranged at one end of the frame. 5. A springless self-priming electromagnet as claimed in claim 1, characterized in that: the electrical pure iron is hollow columnar.