KR20100099938A - Magnet gear - Google Patents

Abstract

PURPOSE: A magnet gear is provided to reduce a manufacturing cost by manufacturing a cylindrical magnet with various external diameters using a divisional magnet without a mold. CONSTITUTION: A magnet gear(220) is inserted in a metal-based holder(210). A shaft is inserted in the magnet gear by fixing to the metal-based holder. Eight divisional magnets(221) are combined to form the magnet gear. Each polarity of the magnets is alternately arranged. The divisional magnets are sector shapes and have a long rod shape in an axial direction. Long arcs on and short arcs are arranged on the external side and on the internal side of the divisional magnets, respectively.

Description

Magnet Gears

The present invention relates to a magnet gear, and more particularly, to a magnet gear that can freely adjust the size of the outer diameter of the gear by the combination of the divided magnet.

In general, the gear transmission system known in the art has adopted a gear transmission method involving mechanical contact.

However, such a mechanical gear has a noise generated by meshing between gears, dust generated by meshing between gears, and thus deteriorates durability performance, and has a problem in that lubrication should be performed regularly.

Recently, a magnet gear that transmits power in a non-contact manner by using magnetic attraction force and repulsive force has been developed and used as a technology to replace the mechanical gear.

Such a magnet gear is a device that transmits power in a non-contact manner using magnets to LCD manufacturing equipment, semiconductor manufacturing equipment, pharmaceutical equipment, and food manufacturing equipment that require high cleanliness in preparation for contamination caused by dust, metal particles, and noise. It is used.

However, the conventional magnet gear magnetizes the magnetic force in the diagonal direction to the cylindrical magnet to plate and coat the outside to prevent corrosion. 1 illustrates a conventional cylindrical magnet gear.

As shown in FIG. 1, the conventional circular cylinder magnet gear is used by mounting a shaft in a hole in an aluminum or plastic holder 110 in a state in which the aluminum or plastic injection holder 110 is inserted into the magnet gear 120.

That is, the cylindrical magnet 120 is formed integrally, the outer diameter is different depending on the equipment used for the cylindrical magnet, the cylindrical magnet gears of different sizes to produce a magnet gear by separately manufacturing a mold according to the outer diameter size The manufacturing unit has a problem that goes up.

In addition, the anti-corrosion plating treatment has a thickness of only about 10 to 20 μm, which is easily peeled off, resulting in a problem of shortening the quality of the magnet gear itself.

SUMMARY OF THE INVENTION An object of the present invention for solving the above-described problems is to produce cylindrical magnets of various outer diameters by using a split magnet.

In addition, there is no need to manufacture a separate mold in order to produce a cylindrical magnet of various outer diameters to produce a cylindrical magnet that does not require a mold investment cost.

In addition, it is intended to manufacture a magnet gear that can protect from external impact.

In addition, by using a neodymium magnet and a high temperature neodymium magnet with low thermal susceptibility according to the temperature change to manufacture a magnet gear that can be used at high temperatures.

The magnet gear according to the present invention for solving the above-described problems has a multi-pole of N and S poles by combining a sector-shaped divided magnet having a cross section having an outer arc and an inner arc. It consists of a cylindrical magnet gear.

Here, the magnet gear may be combined to sequentially arrange the N pole / S pole based on any one divided magnet.

Here, the outer surface of the magnet gear can be used to cover the case of aluminum or SUS to protect from external impact.

Here, the split magnets are nonpolar and can be manufactured to be coupled to magnetize the N pole and the S pole sequentially in a diagonal direction in a cylindrical magnet state.

In this case, a magnetic material such as iron may be inserted between the inner side of the powder magnet and the holder 110 to improve the characteristics of the magnet gear.

According to the configuration of the present invention described above, it is possible to produce cylindrical magnets of various outer diameters by using the divided magnet, it is not necessary to manufacture a separate mold can reduce the manufacturing cost, can be used at high temperature, can make a product, It can be protected from the impact of the magnet gear can be improved quality.

Hereinafter, the structure and the effect of the magnet gear according to the present invention will be described with reference to the accompanying drawings.

Figure 2 shows an eight-pole magnet gear according to the combination of the split magnet of the present invention.

Reference numeral (A) is a sectional view, (B) is a right side view of (A), (C) is a perspective view, and (D) is an exploded perspective view.

The magnet gear 220 of the present invention shown in Figure 2 is fitted to the holder 210 made of metal and the shaft is fitted into the inside of the shaft is fixed to the holder 210, the outer case is a thin case made of aluminum or SUS Is written and consists of 8 poles.

The eight-pole magnet gear 220 is composed of a combination of eight divided magnets 221 and the N pole and the S pole are alternately arranged.

The shape of the divided magnet 221 is a fan-shaped shape whose cross section has an outer arc and an inner arc, and has a rod shape long in the axial direction.

Figure 3 shows a 10-pole magnet gear according to the combination of the split magnet of the present invention.

Reference numeral (A) is a sectional view, (B) is a right side view of (A), (C) is a perspective view, and (D) is an exploded perspective view.

The magnet gear 320 of the present invention shown in FIG. 3 is fitted to a holder 310 made of metal, and a shaft is fitted therein so that the shaft is fixed to the holder 210, and the outer case is made of aluminum or SUS. Is written and consists of 10 poles.

The 10-pole magnet gear 320 is composed of a combination of ten split magnets 321, the N pole and the S pole are alternately arranged.

The 8-pole and 10-pole magnet gears 220 and 320 shown in FIGS. 2 and 3 use split magnets 221 and 321 of the same size, and the outer diameters of the cylindrical magnet gears 220 and 320 are different. It is possible to adjust the size of the outer diameter of the cylindrical magnet gears 220 and 320 by using the split magnets 221 and 321 of the same size. That is, in order to manufacture cylindrical magnet gears having different outer diameters, there is no need to separately manufacture molds, thereby lowering the manufacturing cost.

In the present invention, the 8-pole and 10-pole magnet gears have been described as an example, but other magnet gears having other pole numbers can be manufactured in the same manner.

Figure 4 shows another example of the eight-pole magnet gear according to the combination of the divided magnet of the present invention.

Reference numeral (A) is an exploded perspective view, and (B) shows a perspective view of a magnet magnetized in a diagonal direction.

The magnet gear 420 shown in FIG. 4 is fitted to a holder made of metal so that the shaft is fitted inside the shaft, and the shaft is fixed to the holder, and the outer case is covered with a thin case made of aluminum or SUS, and is composed of eight poles.

However, unlike the magnet gear 220 illustrated in FIG. 2, the magnet gear 420 illustrated in FIG. 4 is formed of a combination of eight divided magnets 421, but the divided magnets 421 are nonpolar magnetic materials. After combining the split magnets 421, the magnet is magnetized 422 in a diagonal direction to have an N-pole and an S-pole alternately arranged in a diagonal direction. After magnetizing 422, an aluminum or SUS case is covered on the outside to protect it from external shock as shown in FIGS.

Similarly, a magnet gear having a different number of poles in addition to the eight-pole magnet gear can also manufacture a magnet gear magnetized so that the N-pole and the S-pole in the diagonal direction cross each other.

The above-described split magnets can be produced using any anisotropic magnet capable of mechanical processing.

Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the above-described technical configuration of the present invention may be embodied by those skilled in the art to which the present invention pertains without changing its technical spirit or essential features of the present invention. It will be appreciated that the present invention may be practiced as. Therefore, the above-described embodiments are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the appended claims rather than the detailed description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

1 illustrates a conventional cylindrical magnet gear.

Figure 2 shows an eight-pole magnet gear according to the combination of the split magnet of the present invention.

Figure 3 shows a 10-pole magnet gear according to the combination of the split magnet of the present invention.

Figure 4 shows another example of the eight-pole magnet gear according to the combination of the divided magnet of the present invention.

Claims (5)

A magnet gear having a cylindrical magnet gear having a multipole of N and S poles by combining a fan-shaped divided magnet having a cross section having an outer arc and an inner arc. The method of claim 1, The magnet gear is a magnet gear, wherein the north pole and the south pole are alternately arranged based on any one divided magnet. The method of claim 1, The magnet gear outer surface is covered with a case of aluminum or SUS to protect from external impact. The method of claim 1, The splitting magnet is nonpolar, and the magnet is coupled to the N pole and the S pole in a diagonal direction in a cylindrical magnet state in order to stir and magnetize. The method of claim 1, The split magnet is a magnet gear using an anisotropic magnet capable of mechanical processing.

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