KR20060091946A - Electro-permanent magnetic lift - Google Patents

Abstract

The present invention provides a magneto-electromagnetic lift comprising an electric coil in which a permanent magnet is positioned around a housing, an iron core, and a medium of a ferromagnetic material, and a lead cable is connected around the permanent magnet.

According to the present invention, it is possible to generate a larger suction force with the permanent magnet of the same size, and to easily implement a circular magnetic lift, as well as easier to assemble and to implement a lower magnetic lift height.

Magnetic lift, permanent magnet, electric coil

Description

Electromagnetic Magnetic Lift {Electro-Permanent Magnetic Lift}

1 is a cross-sectional view for explaining the principle of adsorption of a conventional magnetic lift;

2 is a cross-sectional view for describing a detachment principle of a conventional magnetic lift;

3 is a cross-sectional view of an electro-magnetic lift according to a preferred embodiment of the present invention;

4A and 4B are perspective views each showing the shape of a permanent magnet according to a preferred embodiment of the present invention;

5A to 5C are bottom views each showing a zero-electrical magnetic lift according to a preferred embodiment of the present invention;

6 is a cross-sectional view for explaining the principle of adsorption of the magnetic-electromagnetic magnetic lift in accordance with a preferred embodiment of the present invention;

7 is a cross-sectional view for explaining the principle of detachment of the magnetic-electromagnetic magnetic lift in accordance with a preferred embodiment of the present invention;

Brief description of the main parts of the drawing

100 housing 110 iron core

120: first permanent magnet 130: second permanent magnet

140: medium 150: electric coil

160: lead cable 170: the object to be adsorbed

The present invention relates to a device for adsorbing, fixing, transporting and detaching an adsorbed object using a magnetic field of a permanent magnet, and more particularly, using a first permanent magnet having a large coercivity and a second permanent magnet having a small coercive force. The present invention relates to a magnetic and electronic magnetic lift for fastening, transporting or detaching a metal object simply and safely by using a flow of magnetic flux generated in each permanent magnet.

In industrial sites such as automated production lines, lifts (or lifts) for transporting or fixing objects to be absorbed are essential equipment. Many of these lifts use magnets, but using only permanent magnets is difficult to desorb, and using only electromagnets requires not only a large amount of power to obtain a certain attraction force, but also a power supply or power system. In the event of a problem, the adsorbed objects can fall freely or drop off during operation, which can lead to enormous safety accidents, which can complement the shortcomings of both sides and reduce power consumption. Magnetic lifts that can be used semi-permanently without failure have been used since the 1980s. Magnetic lift having the above advantages includes two types of permanent magnets, namely fixed permanent magnets (first permanent magnets) and variable permanent magnets (second permanent magnets), and the polarity of the second permanent magnets is changed appropriately by power supply. It has been used to adsorb and desorb an object.

1 and 2 are respectively adsorption and desorption principle diagram of the magnetic lift according to the prior art. As shown in the drawing, the conventional magnetic lift has a top plate 10 on which a device (not shown) for transferring a lift is installed, and iron cores 20 of ferromagnetic materials are installed below both ends of the top plate, and between the iron cores 20. The first permanent magnet 30 having a large coercive force and the second permanent magnet 40 having a small coercive force are inserted into the separator, and a separator 50 for preventing leakage of magnetic flux (indicated by diagonal lines) generated in the permanent magnet is provided. Located between the top plate 10 and the iron core 20, the second permanent magnet 40 is wrapped in the electric coil 60, the power supply for supplying electricity to the electric coil 60 (not shown) C) and lead cable 70.

Looking at the adsorption principle of the conventional magnetic lift shown in Figure 1, when arranged so that the polarity of the first permanent magnet 30 and the second permanent magnet 40 is the same, the first permanent magnet 30 and The magnetic flux (indicated by diagonal lines) from the N pole of the second permanent magnet 40 passes through the ferromagnetic iron core 20 and the adsorbed object 80 to be adsorbed, and thus the first permanent magnet 30 and the second permanent magnet. A magnetic flux flow (indicated by diagonal lines) reaching the S poles of the first permanent magnet 30 and the second permanent magnet 40 is formed through the iron core 20 adjacent to the S pole of 40. Adsorption force is generated between the ferromagnetic iron core 20 and the object to be adsorbed, and the adsorbed object 80 can be adsorbed by the adsorbing force.

After the adsorption force is generated, the polarity of the second permanent magnet 40 is maintained as it is, even if the electric power of the power supply device (not shown) installed outside is maintained, and thus the first permanent magnet 30 and the second permanent magnet ( Adsorption force between the iron core 20 and the object to be absorbed 80 of the ferromagnetic material by 40 is maintained.

On the other hand, as shown in FIG. 2, when the object to be absorbed 80 is desorbed from the iron core 20, the polarity of the second permanent magnet 40 and the polarity of the first permanent magnet 30 are opposite to each other. When electricity is supplied by a power supply device (not shown) installed externally so that the magnetic flux (denoted by diagonal lines) from the N pole of the first permanent magnet 30 is not passed through the object to be absorbed, the second permanent Since the magnetic flux flow (indicated by diagonal lines) entering the S pole of the magnet 40 is formed, the adsorption force between the ferromagnetic iron core 20 and the object to be absorbed 80 is removed so that the object to be absorbed 80 is detached from the lift. do.

However, in the conventional magnetic lift described above, since two permanent magnets should be stacked in a narrow area, it is not only difficult to assemble and stack small permanent magnets when producing a large lift, but also the volume becomes too large. However, there is a problem that it is difficult to implement a circular magnetic lift.

In addition, the leakage magnetic flux is generated through the separator 50 and the upper plate 10 has a disadvantage that the adsorption force is lost.

The present invention has been proposed to compensate for the above disadvantages of the conventional magnetic lift, and is to provide an electro-magnetic magnetic lift that is easy to assemble and can easily implement various types of magnetic lifts including a circular shape.

In addition, to reduce or suppress the leakage magnetic flux to provide a magneto-electromagnetic lift that can generate a larger suction force even by a magnet of the same size.

In order to achieve the above object, the present invention comprises a housing; An iron core of a ferromagnetic material disposed inside the housing; A first permanent magnet disposed along a circumference of the iron core; A second permanent magnet located between the housing and the upper surface of the iron core; A medium installed in contact with an inner surface of the housing while being adjacent to the first permanent magnet; An electric coil wound around the second permanent magnet; It provides an electro-magnetic magnetic lift comprising a lead cable connected to the electric coil.

The iron core according to the present invention is characterized in that the cylindrical, square or polygonal pillar shape, the first permanent magnet is dispersed in a plurality.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

3 is a cross-sectional view of the magnetic-electromagnetic lift according to a preferred embodiment of the present invention, the magnetic-electromagnetic lift according to the present invention includes a housing 100, an iron core 110 disposed inside the housing, and The first permanent magnet 120 disposed around the iron core 110, the second permanent magnet 130 formed between the housing 100 and the upper surface of the iron core 110, and the iron core 110 Leads for supplying power to the electric coil 150 is connected to the medium 140 and the electric coil 150 and the external power supply (not shown) surrounding the second permanent magnet 120 located in the vicinity Cable 160. Although not shown, a moving device for moving the lift is installed at the upper portion of the housing 100.

The housing 100 is to prevent the magnetic flux generated in the zero-electromagnetic magnetic lift according to the present invention to leak to the outside to reduce the adsorption force, preferably made of a ferromagnetic material. To this end, the housing 110 may be assembled into a polygonal shape that is circular or preferably rectangular. For example, when the housing 110 has a rectangular shape, one or more permanent magnets according to the present invention may be coupled to every four sidewalls.

An iron core 110 is disposed inside the housing 100 to absorb or desorb the object to be adsorbed (see FIG. 6). The iron core 110 is a ferromagnetic material having a shape of a vertical column, for example, a square column, having a cylindrical or polygonal cross section. Preferably, the iron core 110 may include an upper portion of a columnar shape having a polygonal cross section such as a circle or a square, and a lower portion of the columnar shape having a cross section of a circle or polygon having the same or different diameter than the upper portion.

On the other hand, the first permanent magnet 120 is disposed along the circumference of the iron core 110, when the iron core 110 is composed of the upper and lower, the first permanent magnet 120 is iron core 110 It may be disposed along the periphery of the bottom of the). In addition, the first permanent magnet 120 is preferably disposed so that the polarity of the N pole and the S pole is divided up and down.

On the other hand, independently of the first permanent magnet 120, the second permanent magnet 130 is not positioned to overlap the upper portion of the first permanent magnet 120 as conventionally, the upper portion of the iron core 110 and the Located in the space between the housing (100). Therefore, it is possible to overcome the design and assembly difficulties caused by the overlapping position of the first permanent magnet and the second permanent magnet. At this time, preferably, the first permanent magnet 120 has a larger coercive force than the second permanent magnet 130.

Meanwhile, in the present invention, the magnetic flux is formed between the first permanent magnet 120 and the second permanent magnet 130 adjacent to the first permanent magnet 120 disposed along the circumference of the iron core 110. The medium 140 for performing this is located. At this time, the medium 140 is preferably a ferromagnetic material, it may be located on the lower surface of the first permanent magnet 120.

This structure has the advantage that it is easier to assemble, reduce the volume of the lift, and can easily implement a circular magnetic lift in the case of a large magnetic lift, it can be arranged horizontally distributed without stacking small permanent magnets, The same permanent magnet can generate a large adsorption force.

That is, in the present invention, the first permanent magnet 120 having a relatively high coercive force is arranged along the periphery of the iron core 110, and the second permanent magnet 130 is not laminated with the first permanent magnet 120. Since it is comprised, the shape of the iron core 110, the shape of the 1st permanent magnet 120, etc. can be adjusted according to the usage aspect etc. of the magnetic lift of this invention.

4A or 4B respectively show the shape of the first permanent magnet 120 according to the preferred embodiment of the present invention.

As shown in FIG. 4A, the first permanent magnet 120 is formed in a semicircular or quarter-circle shape, and the polarity is generated on the upper and lower surfaces of the first permanent magnet 120, respectively. Thus, the shape of the entire magnetic lift of the present invention can be configured as a circular shape instead of a conventional rectangular shape through the semi-circular first permanent magnet 120. To this end, the shape of the first permanent magnet 120 is illustrated in FIG. It is not limited to a semicircle as shown in 4a, but may have a ring shape.

In particular, a plurality of first permanent magnets 120 according to the present invention may be distributed along the periphery of the iron core 110. For example, when the semi-circular first permanent magnet 120 shown in FIG. 4A is adopted, two semi-permanent first permanent magnets 120 may be disposed adjacent to each other.

Meanwhile, the first permanent magnet 120 according to the present invention may be manufactured in a block form while having a polygonal shape such as a quadrangle as shown in FIG. 4B, and may be configured such that polarity is generated on its upper and lower surfaces. have. This configuration makes it easy to build a magnetic lift in the form of a box as a whole. In this case, of course, the first permanent magnets 120 may have a shape in which a plurality of the first permanent magnets 120 are distributed along the periphery of the iron core 110.

Referring to the preferred arrangement of the magnetic lift of the present invention including a permanent magnet having a shape as described above is as follows. 5A to 5C are bottom views schematically showing the configuration of the magnetic lift according to the preferred embodiment of the present invention, respectively.

FIG. 5A illustrates a case in which the first permanent magnet 120 has a semicircular or ring shape, and is adjacent to the iron core 110 and the first permanent magnet 120 in which the first permanent magnet 120 is disposed. The housing 100, which accommodates the medium 140, the iron core 110, and the first permanent magnet 120 installed therein, is configured in a circular shape. At this time, each of the permanent magnets may be disposed along a portion of the iron core so that the first permanent magnets 120 may be distributed in a plurality in the circumference of the iron core 110.

On the other hand, Figure 5b is the iron core 110 is formed around the first permanent magnet 120 is a circular shape as a whole, but is not limited to this, the housing 120 that accommodates the iron core 110 and the like inside the box The configuration of the magnetic lift in form is shown. In this case, the first permanent magnet 120 may have a semicircle or ring shape as shown in FIG. 4A, and a plurality of first permanent magnets independent of each other, as shown in FIG. 4B, may have a block shape. Can be configured.

In addition, Figure 5c shows a plurality of magnetic lifts configured in accordance with the present invention is installed horizontally in the interior of the housing (100). That is, the first permanent magnet (not shown) and the mediator 140 are disposed around each of the iron cores 110 each having a cylindrical shape in the housing 100 having a box shape. In this case, the first permanent magnet (not shown) disposed around each iron core 110 may have a semicircle or ring shape, but preferably, as shown in FIG. 1 Permanent magnets can be distributedly arranged.

Although not shown in detail through the drawings, the magnetic lift shape described above is merely an example, and the magnetic lift according to the present invention may have a circular or polygonal bottom surface according to the shape of the housing 100 and the iron core 110. Of course, the shape or number of the side walls may also vary accordingly. For example, the iron core 110 installed in the box-shaped housing 100 has a square pillar shape, and a plurality of first permanent magnets as shown in FIG. 4B are distributed along each vertical surface of the square pillar. It can have

Through the above-described configuration and easy to assemble, it is possible to implement a magnetic lift in the form of a circular shape and a box as a whole, looking at the principle of the magnetic lift according to the present invention.

6 is a cross-sectional view for explaining the principle of adsorption of the magnetic and electronic magnetic lift according to an embodiment of the present invention, the polarity of the first permanent magnet 120 disposed around the iron core 110, the iron core 110 and the housing On the electric coil 140 wound around the second permanent magnet 130 by a power supply device (not shown) installed outside to maintain the same polarity of the second permanent magnet 130 positioned between the (100). When electricity is supplied, the magnetic flux Φ1 generated by the first permanent magnet 120 and the magnetic flux Φ2 generated by the second permanent magnet 130 form a magnetic flux flow as indicated by diagonal lines, The adsorption object 170 flows through the object to be adsorbed to the lift.

After the adsorption force is generated, since the polarity of the second permanent magnet 130 is maintained even if the power of the power supply device (not shown) installed outside is maintained, the first permanent magnet 120 and the second permanent magnet ( Adsorption force between the lift by 130 and the object to be adsorbed is maintained.

FIG. 7 illustrates the principle of desorption of the magnetic / electromagnetic lift according to an exemplary embodiment of the present invention, wherein the polarity of the first permanent magnet 120 disposed around the iron core 110 and the upper surface of the iron core 110 are shown. When the electricity is supplied to the electric coil 140 wound around the second permanent magnet 130 by an external power supply device (not shown) so that the polarity of the second permanent magnet 130 located is reversed. The magnetic flux Φ from the N pole of the magnet 120 forms a magnetic flux flow (indicated by a diagonal line) entering the S pole of the second permanent magnet 130 without passing through the object to be absorbed (170). The adsorption force between 110 and the object to be adsorbed is removed to detach the object to be adsorbed from the lift.

In the above, a preferred embodiment of the present invention has been described, but the present invention is not limited thereto. Rather, it will be apparent to those skilled in the art that various modifications and variations can be readily made. However, it will be more apparent through the appended claims that such modifications and variations fall within the scope of the present invention without departing from the spirit of the present invention.

In the case of the zero-electromagnetic magnetic lift according to an embodiment of the present invention, it is easy to manufacture in the form of a circle and a box, it is possible to generate a larger suction force by removing the leakage magnetic flux, and further divided one permanent magnet smaller Can be assembled more easily by dispersing.

In addition, since power is supplied only at the moment of adsorbing or desorbing the object to be absorbed, it is possible to drastically reduce the electric energy consumption. It is possible to prevent safety accidents.

Claims (3)

A housing; An iron core of a ferromagnetic material disposed inside the housing; A first permanent magnet disposed along a circumference of the iron core; A second permanent magnet located between the housing and the upper surface of the iron core; A medium installed in contact with an inner surface of the housing while being adjacent to the first permanent magnet; An electric coil wound around the second permanent magnet; An electromagnet magnetic lift comprising a lead cable connected to the electric coil. The method according to claim 1, The first permanent magnet (120) and the second permanent magnet (130) is an electro-magnetic lift, characterized in that the circular shape. The method according to claim 1 or 2, The first and second permanent magnets are magnetically and electromagnetically lifted, characterized in that a plurality of dispersing disposed along the circumference of the core.

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