JP2019193366A - Magnetic rotation device - Google Patents

Abstract

To provide a magnetic rotation device in which a repulsive force obtained from magnets is effectively used for a rotating motion.SOLUTION: The magnetic rotation device includes a stator and a rotor which are disposed so as to be opposed to each other, and a rotary shaft passing through the stator and the rotor, the rotor being configured to rotate with respect to the stator. The stator and the rotor each include a disc section having a disc-like shape. A magnet, and a shielding cover covering the magnet with an exposed surface left are disposed on each of the opposed surfaces of the disc sections. The exposed surface of the magnet provided on the stator and the exposed surface of the magnet provided on the rotor have the same pole, and the normal line of each of the exposed surfaces of the magnets is inclined at a prescribed inclination angle with respect to a surface of the disc section. When the rotor rotates with respect to the stator, the exposed surfaces are opposed to each other so that a repulsive force is generated in the rotation direction of the rotor.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a magnetic rotating device, and more particularly, to a magnetic rotating device in which rotation is promoted by magnets arranged opposite to each other in the rotation axis direction.

  In a conventional magnetic rotating device, a permanent magnet is disposed on a stator fixed to a rotating shaft, while a permanent magnet is also disposed on a rotor that rotates around the rotating shaft. The permanent magnet of the stator and the permanent magnet of the rotor are disposed so as to face each other in the direction perpendicular to the rotation axis. Each permanent magnet is provided with a magnetic shield, and a magnetic force is exerted only in the rotation direction, and the rotor is rotated by the repulsive force of the magnetic force (see, for example, Patent Document 1).

Japanese Utility Model Publication No. 5-11788

  However, in the above-described magnetic rotating device, since the rotor is arranged on the inner side in the radial direction of the stator, the degree of freedom of arrangement of the magnet and the magnetic shield is limited, and the rotor and the stator are arranged. The magnitude of the repulsive force obtained from the magnet was also limited, and sufficient rotational force could not be obtained.

  Therefore, an object of the present invention is to provide a magnetic rotating device that effectively uses a repulsive force obtained from a magnet for rotational movement.

One aspect of the present invention is:
A magnetic rotating device that includes a stator and a rotor arranged opposite to each other, and a rotating shaft that passes through the stator and the rotor, and the rotor rotates with respect to the stator,
The stator and the rotor each include a disk-shaped disk portion, and on the surfaces of the disk portion facing each other, a magnet and a shielding cover that covers the magnet leaving an exposed surface are provided, respectively.
The exposed surface of the magnet provided on the stator and the exposed surface of the magnet provided on the rotor have the same polarity, and the normal line of the exposed surface of the magnet is inclined at a predetermined inclination from the surface of the disk portion. The magnetic rotating device is characterized in that when the rotor is rotated with respect to the stator, the exposed surfaces face each other and produce a repulsive force in the direction in which the rotor rotates.

  In one aspect of the present invention, when the rotor rotates with respect to the stator, the exposed surface of the stator magnet and the exposed surface of the rotor magnet, which have the same polarity, face each other. At this time, since the exposed surfaces are inclined at a predetermined angle, when the magnets approach each other, the repelling force is suppressed by the shielding cover, while when the magnets are separated from each other, the repulsion between the exposed surfaces of the magnets occurs. A force is generated that causes the rotor to rotate.

It is the schematic of the magnetic rotating apparatus concerning embodiment of this invention. 1 is a perspective view of a magnetic rotating device according to an embodiment of the present invention. It is a front view of the magnetic rotating apparatus concerning embodiment of this invention. It is a right view of the stator concerning embodiment of this invention. It is a left view of the stator concerning embodiment of this invention. It is a perspective view of the rotor concerning an embodiment of the invention.

  FIG. 1 is a schematic view of a magnetic rotator according to an embodiment of the present invention, which is represented as a whole by 100, as viewed from above. As shown in FIG. 1, the magnetic rotating device 100 includes a rotating shaft 30, a stator 10 and a rotor 20 through which the rotating shaft passes. The stator 10 is fixed to the pedestal portion 40. On the other hand, the rotor 20 is fixed to the rotating shaft 30. The rotary shaft 30 is supported by two rotary shaft support bases 50 having bearings, and rotates around the central axis A of the rotary shaft 30. The rotation of the rotary shaft 30 is transmitted to the pulley 70 via the belt 60.

  FIG. 2 is a perspective view of the stator 10 and the rotor 20 of the magnetic rotating device 100, and FIG. 3 is a front view as seen in the Y-axis direction. As shown in FIGS. 2 and 3, the stator 10 has a disk-shaped disk portion 11. The disk part 11 is fixed to a pedestal part (not shown). A through hole 18 (see FIG. 4) through which the rotary shaft 30 passes is provided in the center of the disk portion 11. In a state where the rotating shaft 30 is passed through the through hole 18, the rotating shaft 30 is rotatably held with respect to the disk portion 11.

  The disk portion 11 of the stator 10 has a first main surface 11a and a second main surface 11b that are parallel to each other, and eight magnets 12 are disposed on the first main surface 11a. The number of magnets 12 is not limited to this and may be one or more, but is preferably three or more in order to make the rotation speed uniform. When a plurality of magnets 12 are arranged, the magnets 12 are arranged so that the central angles are equal to each other. In the embodiment of the present invention, since eight magnets 12 are provided, each central angle is 45 °. For example, a permanent magnet is used as the magnet 12.

  The magnet 12 has a rectangular parallelepiped shape and is accommodated in the shielding cover 14. The shielding cover 14 is formed of a non-magnetic material such as Sn and reduces the influence of the magnetic field of the magnet 12. The shielding cover 14 covers five surfaces of the rectangular parallelepiped magnet 12 and exposes only one surface. The magnet 12 and the shielding cover 14 may have other configurations as long as only one surface of the magnet 12 is exposed.

  On the first main surface 11 a of the disk portion 11, a support base 15 made of a nonmagnetic material is fixed with screws 13. The shielding cover 14 containing the magnet 12 is fixed on the inclined surface of the support base 15. Fixing is performed by adhesion, welding, screwing or the like. The inclined surface of the support base 15 is inclined by a predetermined angle θ1 with respect to the first main surface 11a of the disk portion 11. In order to exhibit the performance as the magnetic rotating device 100, the angle θ1 is preferably 15 ° or more and 75 ° or less, and more preferably 45 °.

  FIG. 4 is a right side view of the stator 10. The second main surface 11b of the disk portion 11 is provided with a screw 13 for fixing the support base 15 on the first main surface 11a. In the center of the disk portion 11, a through hole 18 for passing the rotating shaft 30 is provided.

  FIG. 5 is a left side view of the stator 10. On the first main surface 11 a of the disk portion 11, eight support bases 15 are fixed, and a magnet 12 covered with a shielding cover 14 is provided on each of them. The exposed surface of the magnet 12 is arranged such that the normal line is perpendicular to the radial direction of the first main surface 11a. The eight support bases 15 are arranged at equal distances from the central axis A and at equal intervals (equal central angles).

  FIG. 6 is a perspective view of the rotor 20. As shown in FIG. 6, the rotor 20 has a disk-shaped disk portion 21. The disk portion 21 of the rotor 20 has a first main surface 21a and a second main surface 21b that are parallel to each other. The disk unit 21 is fixed to a rotary shaft 30 that penetrates the disk unit 21, and rotates around the central axis A together with the rotary shaft 30. In the case of the rotor 20 shown in FIG. 6, the rotation direction is the B direction.

  Similar to the stator 10, on the first surface 21a of the disk portion 21 of the rotor 20, eight magnets 22 are arranged at equal distances from the central axis A and at equal intervals (center angles are equal). ing. For example, a permanent magnet is used as the magnet 22. In the embodiment of the present invention, since eight magnets 22 are provided, each central angle is 45 °. The number of magnets 22 is preferably equal to the number of magnets 12 provided on the stator 10.

  The rectangular parallelepiped magnet 22 is accommodated in the shielding cover 24, and five surfaces of the magnet 22 are covered and one surface is exposed. The shielding cover 24 containing the magnet 22 is fixed on the inclined surface of the support base 25 fixed with screws 23 on the first main surface 21a of the disk portion 21 by adhesion, welding, screwing or the like. The inclined surface of the support base 25 is inclined with respect to the surface of the disk portion 21 by a predetermined angle θ2. The angle θ2 is preferably 15 ° or greater and 75 ° or less, and more preferably 45 °.

  In the magnetic rotating device 100, as shown in FIG. 3, the first main surface 11a of the disk portion 11 of the stator 10 and the first main surface 21a of the disk portion 21 of the rotor 20 are parallel to each other. Are arranged to face each other at a predetermined interval. The magnet 12 of the stator 10 and the magnet 22 of the rotor 20 are arranged so that the exposed surfaces of the magnets 12 and 22 are parallel to each other. That is, in FIG. 3, the inclination angles of the support bases 15 and 25 (the angles between the normal surfaces of the exposed surfaces of the magnets 12 and 22 and the first main surfaces 11a and 21a) θ1 and θ2 are θ1 = θ2. Be placed. The exposed surfaces of the magnets 12 and 22 have the same polarity.

  In the magnetic rotating device 100 according to the embodiment of the present invention, the exposed surfaces of the magnets 12 and 22 are arranged so as to be parallel to the radial direction of the first main surfaces 11a and 21a. The present invention is not limited to this as long as the rotor rotates in a magnetic repulsive force. However, the force that rotates the rotor decreases as the normal direction of the exposed surfaces of the magnets 12 and 22 approaches the radial direction of the first main surfaces 11a and 21a.

  Next, the operation of the magnetic rotating device 100 will be described. In the magnetic rotating device 100, first, the rotor 20 is rotated in the B direction together with the rotating shaft 30 in a state where the stator 10 is fixed. When the rotor 20 rotates in the B direction, the distance between the opposing magnets 12 and 22 changes.

  As can be seen from FIG. 3, when the distance between the magnets 12 and 22 approaches, the surface of the magnets 12 and 22 covered with the shielding covers 14 and 24 approaches, so that magnetic force interaction occurs between the magnets 12 and 22. Absent.

  Further, when the rotor 20 rotates in the B direction and the exposed surfaces of the magnets 12 and 22 face each other, a repulsive force is generated between the magnets 12 and 22 having the same polarity. Due to this repulsive force, a force acts to rotate the rotor 20 in the direction in which the distance between the magnet 12 and the magnet 22 increases, that is, in the B direction.

  Thus, in the magnetic rotating device 100, when the rotor 20 rotates in the B direction with respect to the stator 10, the repulsive force of the magnets 12 and 22 provided on the stator 10 and the rotor 20 respectively, The rotor 20 can be rotated in the B direction.

  In particular, in the magnetic rotating device 100 according to the embodiment of the present invention, since the magnets 12 and 22 are arranged to face each other in the direction of the central axis A (X-axis direction) of the rotating shaft 30, the magnets 12 and 22 and the shielding cover are arranged. 14, 24 and support bases 15 and 25 are more freely arranged than in the conventional structure, and the repulsive force obtained between the magnets 12 and 22 arranged on the stator 10 and the rotor 20 is increased, which is more efficient. Rotational force can be obtained.

  Although the present invention has been described by taking one embodiment as an example, it should not be understood that the present invention is limited to this embodiment. Various improvements, design changes, and deletions may be added to this embodiment. Also, other embodiments may be created by combining any feature described in this embodiment.

  For example, a plurality of pairs of the stator 10 and the rotor 20 may be provided on one rotating shaft 30. Thereby, the repulsive force of the magnets 12 and 22 can be enlarged, and a larger rotational force can be obtained. Further, the rotor 20 may be disposed on both sides of the stator 10, and the magnet 12, the shielding cover 14, and the support base 15 may be disposed on both surfaces (first main surface 11 a and second main surface 11 b) of the stator. .

DESCRIPTION OF SYMBOLS 10 Stator 11 Disk part 12 Magnet 13 Screw 14 Shield cover 15 Support base 18 Through hole 20 Rotor 21 Disk part 22 Magnet 23 Screw 24 Shield cover 25 Support base 30 Rotating shaft 40 Pedestal part 50 Rotating shaft support base 60 Belt 70 Pulley 100 Magnetic rotating device

Claims (5)

A magnetic rotating device that includes a stator and a rotor arranged opposite to each other, and a rotating shaft that passes through the stator and the rotor, and the rotor rotates with respect to the stator,
The stator and the rotor each include a disk-shaped disk portion, and on the surfaces of the disk portion facing each other, a magnet and a shielding cover that covers the magnet leaving an exposed surface are provided, respectively.
The exposed surface of the magnet provided on the stator and the exposed surface of the magnet provided on the rotor have the same polarity, and the normal line of the exposed surface of the magnet is Inclined by a predetermined inclination angle from the surface, and when the rotor rotates with respect to the stator, the exposed surfaces face each other to generate a repulsive force in the direction in which the rotor rotates. Magnetic rotating device.   The magnetic rotating apparatus according to claim 1, wherein an exposed surface of the magnet is parallel to a radial direction of the disk portion.   The magnetic rotating apparatus according to claim 1, wherein the magnet has a rectangular parallelepiped shape, and five surfaces other than an exposed surface are covered with the shielding cover.   The magnetic rotation device according to any one of claims 1 to 3, wherein an inclination angle of the magnet of the stator is equal to an inclination angle of the magnet of the rotor and is 15 ° or more and 75 ° or less. The magnetic rotating apparatus according to claim 1, wherein the plurality of magnets are arranged at equal intervals from the center of the disk portion at equal intervals.

Images