Dynamo-electric generator

Abstract

To provide a dynamo-electric generator in which a rotator having a magnet and a rotator having a coil are rotated in an inverse direction each other in order to generate an electric motive force to the coil.SOLUTION: A dynamo-electric generator comprises a rotational shaft 4 penetrating each of rotational bodies 1, 2, and 3. In each of the rotational bodies 1 and 3, a rotational shaft 4 is fixed, and in the rotational body 2, an insertion hole 21 of the rotational shaft 4 is provided. On a surface of the rotational bodies 1 and 3 that are opposite to the rotational body 2, first bevel gear wheels 12 and 31 are fixed, and on the surface of the rotational body 2 that is opposite to the rotational bodies 1 and 3, a second bevel gear wheel 22 is fixed. Transmission bevel gear wheels 51 and 52 transmitting a rotational force of the first bevel gear wheels 12 and 31 to the second bevel gear wheel 22 by inverting a rotational direction of them are arranged between the first bevel gear wheels 12 and 31 and the second bevel gear wheel 22. In the dynamo-electric generator, since the rotational body 2 is rotated to an inverse direction to the direction of each of the rotational bodies 1 and 3, a relative rotational speed against the rotational bodies 1 and 3 of the rotational body 2 becomes large, and a power generation efficiency is improved.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a generator in which a rotating body having a magnet and a rotating body having a coil rotate in opposite directions to generate an electromotive force in the coil.

Background Art

[0002] Conventionally, a generator has disposed a magnet and a coil formed by winding a conducting wire in proximity, and rotates the magnet with respect to the coil or rotates the coil with respect to the magnet to generate an induced current in the coil and perform power generation. In this way, when the magnetic flux linked to the coil changes with time, an electromotive force is generated in the coil.

[0003] For example, Patent Document 1 below describes a generator in which a disk-shaped coil unit equipped with a plurality of coils is disposed between two disk-shaped magnetic pole plates, and the magnetic pole plates are rotated by a windmill to cause power generation in the coils.

Prior Art Document

Patent Document

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In this type of generator, in order to improve the power generation efficiency, how to increase the relative rotational speed between the magnetic pole plate and the coil unit has become a problem. The present invention aims to increase the power generation efficiency of a generator by rotating a rotating body having a magnet and a rotating body having a coil in opposite directions to solve such problems.

Means for Solving the Problems

[0006] The present invention is a generator that rotates a disk-shaped first rotating body having a magnet and a disk-shaped second rotating body having a coil in opposite directions to generate an electromotive force in the coil facing the magnet. A rotating shaft is provided that penetrates the first rotating body and the second rotating body. Inside the first rotating body and the second rotating body, one of the rotating bodies has the rotating shaft fixed thereto, and the other rotating body is provided with an insertion hole through which the rotating shaft is inserted. On the surface of the one rotating body facing the other rotating body, a first bevel gear that tapers toward the other rotating body is fixed. On the surface of the other rotating body facing the one rotating body, a second bevel gear that tapers toward the one rotating body is fixed. Also, between the first bevel gear and the second bevel gear, a transmission bevel gear that transmits the rotational force of the first bevel gear to the second bevel gear with the rotation direction reversed is arranged. Therefore, the one rotating body with the first bevel gear fixed and the other rotating body with the second bevel gear fixed rotate in opposite directions.

[0007] Also, in the present invention, it is desirable to configure the transmission bevel gear with a pair of bevel gears. By doing so, the rotational force of the first bevel gear is stably transmitted to the second bevel gear.

[0008] Also, in the present invention, it is desirable to fix two of the one rotating bodies to the rotating shaft, arrange the other rotating body between them, and arrange the transmission bevel gear between the other rotating body and each of the one rotating bodies. By doing so, the other rotating body that is not fixed to the rotating shaft can be stably positioned.

[0009] Also, in the present invention, the one rotating body can be the first rotating body, and the other rotating body can be the second rotating body. That is, a structure can be adopted in which a disk-shaped rotating body having a coil is arranged between disk-shaped rotating bodies having magnets.

[0010] In the present invention, one of the rotating bodies can be the second rotating body, and the other rotating body can be the first rotating body. That is, a structure can also be adopted in which a disk-shaped rotating body having a magnet is disposed between disk-shaped rotating bodies having coils.

Advantages of the Invention

[0011] In the generator of the present invention, since the disk-shaped rotating body having a coil and the disk-shaped rotating body having a magnet rotate in opposite directions, the relative rotational speed between the coil and the magnet increases, and the power generation efficiency is improved.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Embodiments for Carrying Out the Invention

[0013] Hereinafter, embodiments of the present invention will be described based on examples. FIG. 1 schematically shows the generator of the present invention. This generator mainly includes a disk-shaped first rotating body 1 made of a magnet, a second rotating body 2 in which a plurality of coils 26 are disposed on a disk-shaped substrate, a disk-shaped third rotating body 3 made of a magnet, and a rotating shaft 4 that penetrates the first rotating body 1, the second rotating body 2, and the third rotating body 3.

[0014] Note that an actual generator includes a container for housing the first rotating body 1, the second rotating body 2, the third rotating body 3, etc., means for transmitting the rotational force of the rotation mechanism to the rotating shaft 4, means for extracting the generated electric power to the outside, etc. However, these are omitted here.

[0015] The first rotating body 1 and the third rotating body 3 are fixed to the rotating shaft 4 and rotate integrally with the rotating shaft 4. Since the third rotating body 3 is the reverse of the first rotating body 1, hereinafter, the third rotating body 3 will be referred to as the "first rotating body 3". On the other hand, the second rotating body 2 is different from the first rotating bodies 1 and 3 in that both sides of the disk-shaped body face other rotating bodies and it is not fixed to the rotating shaft 4. Therefore, the second rotating body 2 can rotate independently of the rotation of the rotating shaft 4.

[0016] Figure 2 is a cross-sectional view showing the combined form of the first rotating body 1, the second rotating body 2, and the first rotating body 3. The combined form of the first rotating body 1 and the second rotating body 2 is the same as the combined form of the first rotating body 3 and the second rotating body 2. Figure 3 shows an enlarged view of the combined form of the first rotating body 1 and the second rotating body 2. The first rotating body 1 and the second rotating body 2 have circular recesses 11 and 21 at their combined positions. In the recess 11 of the first rotating body 1, a bevel gear 12 that tapers toward the second rotating body 2 is fixed. Also, in the recess 21 of the second rotating body 2, a bevel gear 22 that tapers toward the first rotating body 1 is fixed.

[0017] The bevel gear 12 has a fitting hole 13 at its center into which the rotating shaft 4 is fitted, and the bevel gear 12 is fixed to the rotating shaft 4. On the other hand, the bevel gear 22 has an insertion hole 23 at its center into which the rotating shaft 4 is loosely fitted, and the bevel gear 22 and the rotating shaft 4 are not fixed.

[0018] Figure 4 shows the bevel gear 12 fixed to the recess 11 of the first rotating body 1 and the bevel gear 22 fixed to the recess 21 of the second rotating body 2.

[0019] Also, as shown in FIG. 3, between the bevel gear 12 and the bevel gear 22, a transmission bevel gear mechanism 5 for transmitting the rotational force of the bevel gear 12 to the bevel gear 22 with the rotation direction reversed is arranged.

[0020] FIG. 5 shows the transmission bevel gear mechanism 5 in an enlarged manner. FIG. 5(a) shows the transmission bevel gear mechanism 5 as viewed from a direction orthogonal to the extending direction of the rotary shaft 4, and FIG. 5(b) shows the transmission bevel gear mechanism 5 as viewed from the extending direction of the rotary shaft 4. The transmission bevel gear mechanism 5 includes two bevel gears 51, 52, a short cylinder 53 through which the rotary shaft 4 is inserted, a short shaft 54 connecting the bevel gear 51 - short cylinder 53, and a short shaft 55 connecting the bevel gear 52 - short cylinder 53. Each of the bevel gears 51, 52 tapers toward the short cylinder 53. The short cylinder 53 is provided with an insertion hole 531 for the rotary shaft 4. One ends of the short shafts 54, 55 are fixed to the outer surface of the short cylinder 53. Bevel gears 51, 52 are rotatably attached to the other ends of the short shafts 54, 55 with respect to the short shafts 54, 55.

[0021] In FIG. 3, when the rotary shaft 4 rotates and the first rotating body 1 and the bevel gear 12 fixed to the rotary shaft 4 rotate, the bevel gears 51, 52 meshing with the bevel gear 12 rotate around the short shafts 54, 55. Then, the bevel gear 22 meshing with the bevel gears 51, 52 rotates, and the second rotating body 2 to which the bevel gear 22 is fixed rotates. At this time, due to the interposition of the bevel gears 51, 52, the rotation directions of the bevel gear 22 and the second rotating body 2 are opposite to the rotation direction of the bevel gear 12 and the first rotating body 1.

[0022] The first rotating body 1 and the first rotating body 3 are, for example, as shown in FIG. 6, composed of a disk body formed by combining a plurality of magnets. FIG. 6(a) shows one surface thereof, and FIG. 6(b) shows the opposite surface. The second rotating body 2 is, for example, as shown in FIG. 7, composed of a disk-shaped substrate 25 and a plurality of coils 26 placed on both surfaces of the substrate 25. Since the first rotors 1 and 3 rotate in the opposite direction to the second rotor 2, the magnetic flux intersecting each coil 26 of the second rotor 2 changes with time, and an electromotive force is generated in each coil 26.

[0023] Note that the winding direction of each coil and the connection method of each coil are set so that the phases of the electromotive forces generated in them coincide. In addition, the electromotive force generated in each coil 26 is taken out to the outside through a slip ring or the like provided on the side of the container that houses the first rotor 1, the second rotor 2, and the first rotor 3.

[0024] In this way, in the generator of the present invention, since the first rotors 1 and 3 provided with magnets and the second rotor 2 provided with coils rotate in opposite directions, the relative rotational speed of the magnets with respect to the coils increases, and the electromotive force generated in the coils increases.

[0025] Here, the case where two bevel gears 51 and 52 are arranged in the transmission bevel gear mechanism 5 has been described. However, even with only one bevel gear, the rotation of the bevel gear 12 can be transmitted to the bevel gear 22 with the rotation direction reversed. However, arranging two bevel gears 51 and 52 in the transmission bevel gear mechanism 5 can transmit the rotation of the bevel gear 12 to the bevel gear 22 more stably.

[0026] Also, here, the case where the first rotor 1 and the first rotor 3 are arranged on both sides of the second rotor 2 has been described. However, a generator can also be configured with only the first rotor 1 and the second rotor 2. In this case, the side of the second rotor 2 that does not face the first rotor 1 is locked to the rotating shaft 4 via a bearing or the like.

[0027] Also, here, an example in which magnets are arranged on the sides of the first rotor 1 and the first rotor 3 and coils are arranged on the side of the second rotor 2 has been shown. However, magnets may be arranged on the side of the second rotor 2, and coils may be arranged on the surfaces of the first rotor 1 and the first rotor 3 that face the second rotor 2.

Industrial Applicability

[0028] The generator of the present invention can be widely used in various industrial fields, and can also be used as a learning material, etc. in the educational field.

Explanation of Signs

[0029] 1 First rotating body 11 Concave portion 12 Bevel gear 13 Fitting hole 2 Second rotating body 21 Concave portion 22 Bevel gear 23 Insertion hole 25 Substrate 26 Coil 3 First rotating body 31 First bevel gear 4 Rotating shaft 5 Transmission bevel gear mechanism 51 Bevel gear 52 Bevel gear 53 Short cylinder 531 Insertion hole 54 Short shaft 55 Short shaft

Claims

1. A generator that rotates a disk-shaped first rotating body having a magnet and a disk-shaped second rotating body having a coil in opposite directions to generate an electromotive force in the coil facing the magnet, comprising a rotating shaft passing through the first rotating body and the second rotating body, wherein, of the first rotating body and the second rotating body, the rotating shaft is fixed to one rotating body, and an insertion hole through which the rotating shaft is inserted is provided in the other rotating body, a first bevel gear that tapers toward the other rotating body is fixed to the surface of the one rotating body facing the other rotating body, a second bevel gear that tapers toward the one rotating body is fixed to the surface of the other rotating body facing the one rotating body, and a transmission bevel gear that transmits the rotational force of the first bevel gear to the second bevel gear with the rotational direction reversed is disposed between the first bevel gear and the second bevel gear.

2. The generator according to claim 1, wherein the transmission bevel gear consists of a pair of bevel gears.

3. The generator according to claim 1 or 2, wherein two of the one rotating bodies are fixed to the rotating shaft, the other rotating body is disposed between the two of the one rotating bodies, and the transmission bevel gear is disposed between the other rotating body and each of the one rotating bodies.

4. The generator according to claim 3, wherein the one rotating body consists of the first rotating body and the other rotating body consists of the second rotating body.

5. The generator according to claim 3, wherein the one rotating body consists of the second rotating body and the other rotating body consists of the first rotating body.

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