JP2009038945A - Magnetic drive mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnetic drive mechanism that reduces a magnetic resistance arising among permanent magnets and brings out smooth drive. <P>SOLUTION: A magnetic drive mechanism includes a rotating means, a rotation transmission means provided on the axis of the rotating means, a permanent magnet rotating in conjunction with the rotation transmission means, and a movable magnet provided in opposition to the permanent magnet to rotate by acting repulsively against and attracting a magnetism of the permanent magnet. The rotating permanent magnet includes many permanent magnets magnetized and arranged in the direction orthogonal to the axial direction, and includes a rotation assistance means provided on the axis of the permanent magnet for assisting the rotation of the permanent magnet that is driven by the rotation of the rotating means. The rotation assistance means includes a column-shaped rotating body where a permanent magnet is provided at one end in the radial direction and a rotating body cover that is placed in opposition to the rotating body in the radial direction to be magnetized to the same magnetic poles as the permanent magnet provided on the rotating body. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a magnetic drive mechanism that converts a rotational movement of a permanent magnet into a rotational movement of another permanent magnet, and more particularly to a magnetic drive mechanism that uses magnetic rotation assisting means.

  Many types of drive mechanisms using magnetism have been proposed. For example, a movable body having a permanent magnet formed in a ring shape with different magnetic poles alternately in the circumferential direction, support means for supporting the movable body, and rotation that generates a rotating magnetic field that passes through each permanent magnet of the movable body There is a linear actuator that reciprocates a movable body in the axial direction by means of magnetism (see Patent Document 1). In addition, a combined power driving apparatus having a three-layer electromechanical structure having a common structure has been proposed (see Patent Document 2).

JP-A-9-121530 JP-A-9-275673

  However, in the case of the linear actuator proposed in Patent Document 1, when a rotating magnetic field is generated in a permanent magnet formed in a ring shape, a magnetic resistance opposite to the rotating direction is generated, and a rotational force that counters this magnetic resistance is generated. Is required, and it is a great burden on the motor which is a means for generating the rotating magnetic field.

  In addition, the power driving device proposed in Patent Document 2 has a structure having an intermediate layer common structure and two independent interactive coaxial electromechanical actuators, and has a problem that the structure becomes complicated.

  The present invention has been made in view of the above problems. In a magnetic drive mechanism that uses a permanent magnet to drive a magnetic pole by causing displacement, the magnetic resistance generated between the permanent magnets is reduced, and smooth driving is achieved. In particular, the present invention provides a magnetic drive mechanism using a rotation assisting means using magnetism.

  For this reason, the magnetic drive mechanism of the present invention includes a rotation means, a rotation transmission means provided on the axis of the rotation means, a permanent magnet that rotates while being connected to the rotation transmission means, and the permanent drive mechanism. A magnetic drive mechanism provided opposite to a magnet and composed of a movable magnet that repels and attracts and rotates with the magnetism of the permanent magnet, wherein the rotating permanent magnet is a plurality of magnets magnetized in the radial direction. A cylindrical rotating body made of a permanent magnet and provided on the axis of the permanent magnet and having a permanent magnet provided at one end in the radial direction, and opposed to the rotating body in the radial direction and provided on the rotating body A first feature is that a rotation assisting means configured to assist the rotation of the permanent magnet by the rotation of the rotation means is constituted by a permanent magnet and a rotating body cover magnetized to the same magnetic pole. .

  The rotation assisting means includes a pair of cylindrical bodies connected to the rotating permanent magnet, a gear portion provided at at least one end of the cylindrical body and meshing with each other in the radial direction, and the pair of cylindrical bodies. The second feature is that the permanent magnet is assisted by the rotation of the rotating means, and the magnets have the same polarity and are arranged to face one end in the radial direction.

  According to a third aspect of the present invention, there is further provided a weight disposed at the other end of the cylindrical body facing the magnet provided at one end in the radial direction of the cylindrical rotating body as the rotation assisting means. .

  The movable magnet is composed of a rotating body that faces the pair of permanent magnets and has at least one permanent magnet disposed thereon. The permanent magnets are arranged evenly in the circumferential direction and are magnetized in the radial direction. 4 features.

  A rotation means; a rotation transmission means provided on the axis of the rotation means; a permanent magnet connected to the rotation transmission means and rotated; and provided to face the permanent magnet; A magnetic driving mechanism comprising a movable magnet that repels and repels the magnetism of the magnet, wherein the rotating permanent magnet is formed of a permanent magnet that is magnetized in a radial direction and formed into a cylindrical shape. The movable magnets facing each other are composed of a rotating body in which a plurality of permanent magnets having the same magnetic pole are arranged in the circumferential direction, are opposed to the rotating permanent magnets in the vertical direction, and rotate in the vertical direction with respect to the rotation of the rotating means. The fifth feature is to move.

  A sixth feature is that the rotation axis of the movable magnet is arranged at a position shifted by an arbitrary width in the vertical direction from the extension line of the rotation axis of the permanent magnet.

  A cylindrical rotating body provided on the axis of the rotating permanent magnet and magnetized on the surface in the axial direction, and opposite to the rotating body in the radial direction and the same as the magnetized cylindrical rotating body. According to a seventh feature of the present invention, there is further provided a rotation assist means including a rotating body cover magnetized on the magnetic pole.

  In addition, it is desirable that the permanent magnets used for the rotation assisting means are arranged so as to have the same magnetic pole in the axial direction.

The magnetic drive mechanism according to the present invention has the following excellent effects.
(1) The rotation assisting means provided on the axis of the permanent magnet is opposed to the columnar rotating body provided with the permanent magnet at one end in the radial direction, in the radial direction of the rotating body, and the columnar rotation Since it is composed of a permanent magnet provided on the body and a rotating body cover magnetized to the same magnetic pole, the magnetic resistance between the movable magnet and the permanent magnet, which is generated when the permanent magnet is rotated, is canceled out. There is no burden on moving means.
(2) The rotation assisting means includes a pair of cylindrical bodies connected to the rotating permanent magnet, a gear portion provided at at least one end of the cylindrical body and meshing with each other in the radial direction, and the pair of cylinders Magnets of the same polarity arranged opposite to one end in the radial direction of the body, and opposed to the rotation transmission by the gear portion to assist the rotation of the permanent magnet by the rotation of the rotation means The reluctance by the same polarity magnet can cancel the magnetoresistance between the movable magnet and the permanent magnet.
(3) Since the weight is further provided at the other end of the cylindrical body facing the magnet provided at one end of the cylindrical rotating body that is the rotation assisting means, the permanent magnet can be rotated more smoothly.
(4) The movable magnet opposed to the permanent magnet is composed of a rotating body in which a plurality of permanent magnets having the same magnetic pole are arranged in the circumferential direction, and is opposed to the rotating permanent magnet in the vertical direction, so there is no connection means such as a gear box. The permanent magnet can be rotated in the vertical direction.
(5) Since the rotation axis of the movable magnet and the extension line of the rotation axis of the permanent magnet are arranged at positions shifted by an arbitrary width in the vertical direction, the rotation direction of the rotating body by the rotation of the permanent magnet is always a constant direction. .

  Hereinafter, although the present invention is explained based on an example, it cannot be overemphasized that the present invention is not limited to this example. FIG. 1 is a structural explanatory view showing a magnetic drive mechanism according to a first embodiment of the present invention, FIG. 2 is a front explanatory view of the rotation assist mechanism of FIG. 1, and FIG. 3 is a magnet arrangement of a movable magnet and a rotating magnet. 4 is a front explanatory view for explaining another embodiment of the rotation assist mechanism, FIG. 5 is a structural explanatory view showing a magnetic drive mechanism according to the second embodiment of the present invention, and FIG. FIG. 7 is an explanatory view showing an application example of FIG. 5.

  1A is a side view of the magnetic drive mechanism of the present invention, and FIG. 1B is a plan view of FIG. As shown in FIGS. 1 and 2, the magnetic drive mechanism 1 according to the present invention has two rotating magnets 5 on a rotating shaft 3 of a motor 2 that is a rotating means via a gear 4 that is a rotating transmission means. The movable magnets 6 are provided in parallel and spaced apart from the rotating magnets 5. The rotation of the movable magnet 6 is transmitted from the rotary shaft 31 to the output side (not shown) via the gears 7 and 7b and the one-way bearing 8. Further, on the shaft of the rotating magnet 5, two cylindrical rotating bodies 9 having the same diameter are provided, and a permanent magnet 10 is provided on one end of the rotating body 9 in the radial direction. A rotating body cover 11 is held on the base 12 so as to face the rotating body 9 in the radial direction. The rotating body cover 11 is provided with a permanent magnet 100 having the same polarity as the permanent magnet 10 in the axial direction.

  A weight 13 is provided opposite to the other end of the magnet 10 provided on one end side of the rotating body 9, and the rotating body 9 and the rotating body cover 11 constitute a rotation assist means 14. The rotation assisting means 14 assists the rotation of the rotating magnet 5 by the motor 2 described later.

  FIG. 3 shows an example of magnet arrangement of the movable magnet 6 and the rotating magnet 5, FIG. 3 (a) is a front explanatory view, and FIG. 3 (b) is a plan explanatory view. As shown in the figure, two permanent magnets 16 are respectively arranged in the radial direction at both ends in the radial direction of the disk-shaped rotating body 15. The two rotating magnets 5 arranged opposite to each other in the axial direction of the rotating body 15 are permanent magnets magnetized in the radial direction, and are arranged so as to be magnetized in opposite directions. The shape of the permanent magnet 16 is not particularly limited.

  In the magnetic drive mechanism 1 having this configuration, the rotating shaft 3 and the gear 4 are rotated by the rotation of the motor 2, and the two rotating magnets 5 are respectively rotated. Then, the movable magnet 6 is rotated by attraction and repulsion generated between the opposing rotating magnet 5 and the magnetic pole of the movable magnet 6, and a constant direction of rotation is always obtained from the rotating shaft 31 via the gear 7 and the one-way bearing 8. At this time, a magnetic resistance that hinders rotation occurs between the rotating magnet 5 and the movable magnet 6, and a load is applied to the motor 2. Since the permanent magnets 10 and 100 have the same polarity between the rotating body 9 and the rotating body cover 11 of the rotation assist mechanism 14 due to this load, magnetic repulsion occurs, and the above-described magnetic resistance can be reduced. Further, the rotation of the rotary body 9 is smoothed by the weight 13 in the rotary body 9, and the rotary magnet 5 and the movable magnet 6 are also smoothly rotated. In addition, even if the rotating body 9 rotates and the permanent magnets 10 and 100 come close again, the rotating body 9 rotates smoothly because it cancels out the attractive force generated between the magnetic poles of the rotating magnet 5 and the movable magnet 6. . The material used for the magnetic drive mechanism of the present invention is preferably an aluminum alloy or ceramics, and the shapes of the permanent magnets 10 and 16 and the shapes of the rotating bodies 9 and 15 are not limited to this embodiment. The number of permanent magnets 16 arranged on the movable magnet 6 is not limited to two, and may be three or more.

  According to the magnetic drive mechanism of the present invention having the above-described configuration, the magnetic resistance generated between the rotating magnet and the movable magnet can be reduced by the rotation assisting means. Allows smooth rotation of the magnet.

  FIG. 4 is an explanatory front view showing another embodiment of the rotation assist mechanism. The rotation assist mechanism 14a is composed of a pair of cylindrical and rotating bodies 9a having the same diameter, and a gear 4a is provided at one end in the axial direction. It is provided and can rotate by meshing with each other. Further, a permanent magnet 10a is provided opposite to one end in the radial direction of the rotating body 9a, and a weight 13a is provided at the other end in the radial direction. The permanent magnets 10a are each magnetized to the same magnetic pole in the axial direction.

  The rotation assist mechanism 14a having this configuration can reduce the magnetic resistance generated between the rotating magnet 5 and the movable magnet 6 of the magnetic drive mechanism 1 in the same manner as the rotation assist mechanism 14 described above. The load generated when the rotary magnet 5 is rotated by 2 is reduced, and the movable magnet 6 can be smoothly rotated.

  Next, another embodiment of the magnetic drive mechanism of the present invention will be described with reference to FIGS. FIG. 5 is an explanatory view of the structure of the magnetic drive mechanism according to the present invention, FIG. 6 is a partially enlarged explanatory view of the movable magnet and the rotating magnet of FIG. 5, and FIG. 7 is an explanatory view showing an application example of FIG. Note that the rotation assist mechanism in the present embodiment is the same as that in the first embodiment and is omitted.

  As shown in FIGS. 5 and 6, the magnetic drive mechanism 1b of the present invention is movable on a rotation shaft 3b of a motor 2b that is a rotation means, with a rotation assist mechanism (not shown), a gear 4b, and a rotating magnet 5b. A magnet 6b is provided in order, and the movable magnet 6b is arranged perpendicular to the rotating magnet 5b in the vertical direction. The rotating shaft 31b of the movable magnet 6b is held at a position shifted by an arbitrary width in the vertical direction from the extended line of the rotating shaft 3b of the rotating magnet 5b. The motor 2b, the rotating magnet 5b, and the movable magnet 6b are all held on the base 12b.

  6A and 6B are partially enlarged explanatory views of the movable magnet 6b and the rotating magnet 5b. FIG. 6A is a side view and FIG. 6B is a plan view. As shown in the figure, the rotating magnet 5b is provided with a permanent magnet 10b magnetized in the radial direction so as to be orthogonal to the rotating shaft 3b, and is rotatable by rotating the rotating shaft 3b. In addition, a movable magnet 6b is disposed at the tip of the rotating magnet 5b so as to be orthogonal to the rotating magnet 5b. The movable magnet 6b is composed of a disk-shaped rotating body 15b, and two fan-shaped permanent magnets 16b are arranged to face each other in the radial direction around the rotating shaft 31b, and the permanent magnet 16b is a rotating shaft 31b. Magnetized to the same polarity in the direction. And the rotating shaft 31b is hold | maintained in the position shifted arbitrary width | variety with the extended line of the rotating shaft 3b at the up-down direction.

  In the magnetic drive mechanism 1b having this configuration, the rotating shaft 3b is rotated by the rotation of the motor 2b, which is a rotating means, and the rotating magnet 5b is rotated. By the rotation of the rotating magnet 5b, the position of the magnetic pole (N pole or S pole) of the permanent magnet 10b changes in the circumferential direction, and the magnetism and repulsion of the permanent magnet 16b disposed on the movable magnet 5b orthogonal to the rotating magnet 5b. And it sucks and rotates around the rotating shaft 31b. At this time, as described above, the rotating shaft 31b is held at a position shifted by an arbitrary width in the vertical direction with respect to the extended line of the rotating shaft 3b, so that the movable magnet 6b by the rotation of the rotating magnet 5b always has the same rotating direction. Thus, the one-way bearing 8 as in the first embodiment is not required. In addition, the rotating magnet 5b and the movable magnet 6b are arranged so that the rotation axes thereof are orthogonal to each other, and the rotating direction of the rotating magnet 5b can be changed to the vertical direction without using a gear or the like. In the present embodiment, the movable magnet 6b is arranged in the vertical direction with respect to the base 12b. Of course, the movable magnet 6b can be arranged in the horizontal direction with respect to the base 12b. The gear 4b is used when rotating a plurality of rotating magnets in parallel when rotating a plurality of movable magnets, as shown in an application example described later.

  FIG. 7 shows an application example of the second embodiment, in which FIG. 7A is a side view and FIG. 7B is a plan view. As in FIG. 5, the rotation assist mechanism is the same as that in the first embodiment and will not be described.

  As shown in the figure, the magnetic drive mechanism 1c includes two rotating magnets on a rotating shaft 3c of a motor 2c that is a rotating means via a rotation assisting mechanism (not shown) and a gear 4c that is a rotation transmitting means. 5c are provided in parallel, two movable magnets 6c are provided so as to be opposed to the rotating magnet 5c via a rotating shaft 31c, and two fixed magnets 17 are separated via the movable magnet 6c. Is provided. Two movable magnets 6c are arranged in parallel perpendicularly to the rotating magnet 5c in the same manner as in the second embodiment, and the rotating shaft 31c of the moving magnet 6c extends from an extension line of the rotating shaft 3c of the rotating magnet 5c. It is held at a position shifted by an arbitrary width in the vertical direction. The motor 2c, the rotating magnet 5c, the movable magnet 6c, and the fixed magnet 17 are all held on the base 12c.

  Here, the permanent magnets 10c and 16c having the same magnetic poles as those of the second embodiment are disposed on the rotating magnet 5c and the movable magnet 6c, respectively, and the stationary magnet 17 has the same magnetic pole as that of the movable magnet 6c and the direction of the rotating shaft 31c. The permanent magnet 17c magnetized in the is disposed.

  In the magnetic drive mechanism 1c having this configuration, the rotating shaft 3c is rotated by the rotation of the motor 2c, which is a rotating means, and the two rotating magnets 5c are rotated via the gear 4c. Due to the rotation of the rotating magnet 5c, the position of the magnetic pole (N pole or S pole) of the permanent magnet 10c changes in the circumferential direction, and the permanent magnet 16c disposed on the two movable magnets 6c orthogonal to the rotating magnet 5c. It repels and attracts the magnetic pole and rotates around the rotating shaft 31c. At this time, since the fixed magnet 17 and the movable magnet 6c arranged via the movable magnet 6c always repel, the movable magnet 6c rotates more smoothly. Moreover, since the rotary shaft 31c of the movable magnet 6c is held at a position shifted by an arbitrary width in the vertical direction from the extension line of the rotary shaft 3c of the rotary magnet 5c, the movable magnet 6c always moves in the same direction. The one-way bearing 8 of the first embodiment is not required. The arrangement of the movable magnet 6c is not limited to the horizontal direction with respect to the base 12c, but may be in the vertical direction.

  According to the magnetic drive mechanism of the present invention having the above-described configuration, the magnetic resistance generated between the rotating magnet made of a permanent magnet and the movable magnet can be reduced by the rotation assisting means. It is possible to rotate the movable magnet by changing the rotation direction of the rotary magnet without using a gear box or the like. In this embodiment, the two movable magnets are connected to each other. However, the present invention is not limited to this.

  As described above, according to the magnetic drive mechanism of the present invention, the magnetic drive mechanism that drives the movable magnet by causing the magnetic pole to be displaced by using the rotating magnet made of the permanent magnet, and that extracts the smooth drive by the rotation assisting means. It is possible to provide. It is also possible to easily change the rotation direction by arranging the movable magnet perpendicular to the rotating magnet.

It is a structure explanatory view showing a magnetic drive mechanism concerning the 1st example of the present invention. It is front explanatory drawing of the rotation assistance mechanism of FIG. It is explanatory drawing which shows the magnet arrangement | positioning of a movable magnet and a rotating magnet. It is front explanatory drawing explaining the other Example of a rotation assistance mechanism. It is structure explanatory drawing which shows the magnetic drive mechanism which concerns on the 2nd Example of this invention. FIG. 6 is a partially enlarged explanatory view of the movable magnet and the permanent magnet of FIG. 5. It is explanatory drawing which shows the application example of FIG.

Explanation of symbols

1, 1b, 1c Magnetic drive mechanism 2, 2b, 2c Motor 3, 3b, 3c Rotating shaft 4, 4a, 4b, 4c Gear 5, 5b, 5c Rotating magnet 6, 6b, 6c Movable magnet 7, 7b Gear 8 One-way bearing 9, 9a Rotating body 10, 10a, 10b, 10c Permanent magnet 11 Rotating body cover 12, 12b, 12c Base 13, 13a Weight 14, 14a, 14b Rotation assist mechanism 15, 15b Rotating body 16, 16b, 16c Permanent magnet 17 Fixed magnet 31, 31b, 31c Rotating shaft 100 Permanent magnet

Claims (7)

  A rotation means; a rotation transmission means provided on the axis of the rotation means; a permanent magnet connected to the rotation transmission means and rotated; and provided to face the permanent magnet; A magnetic drive mechanism comprising a movable magnet that rotates by repelling and attracting magnetism, wherein the rotating permanent magnet is magnetized in a direction perpendicular to the axial direction and arranged. A cylindrical rotating body provided on the axis of the permanent magnet and provided with a permanent magnet at one end in the radial direction; and a permanent body provided on the rotating body, facing the rotating body in the radial direction. A magnetic drive mechanism comprising a magnet and a rotating body cover magnetized to the same magnetic pole, and comprising a rotation assisting means for assisting the rotation of the permanent magnet by the rotation of the rotation means.   The rotation assisting means includes a pair of cylindrical bodies connected to the rotating permanent magnet, a gear portion provided at at least one end of the cylindrical body and meshing with each other in a radial direction, and the pair of cylindrical bodies. The magnetic drive according to claim 1, further comprising a magnet of the same polarity disposed opposite to one end in the radial direction, and assisting the rotation of the permanent magnet by the rotation of the rotating means. mechanism.   3. The weight according to claim 1, further comprising a weight provided at the other end of the cylindrical body facing the magnet provided at one end in a radial direction of the cylindrical rotating body as the rotation assisting unit. Magnetic drive mechanism.   The movable magnet is composed of a rotating body facing the pair of permanent magnets and arranged with at least two permanent magnets, and the at least two permanent magnets magnetized in the radial direction are evenly arranged in the circumferential direction. The magnetic drive mechanism according to claim 1 or 2.   A rotation means; a rotation transmission means provided on the axis of the rotation means; a permanent magnet connected to the rotation transmission means and rotated; and provided to face the permanent magnet; A magnetic drive mechanism comprising a movable magnet that rotates by repelling and attracting magnetism, wherein the rotating permanent magnet comprises a permanent magnet that is magnetized in a direction perpendicular to the axial direction. The movable magnet facing the permanent magnet is composed of a rotating body in which a plurality of permanent magnets having the same magnetic pole in the axial direction are arranged in the circumferential direction, and is opposed to the rotating permanent magnet in the vertical direction. A magnetic drive mechanism that rotates in a direction perpendicular to the rotation of the magnetic drive mechanism.   6. The magnetic drive mechanism according to claim 5, wherein the rotating shaft of the movable magnet is arranged at a position shifted by an arbitrary width in the vertical direction from the extension line of the rotating shaft of the permanent magnet.   A cylindrical rotating body provided on the axis of the rotating permanent magnet and magnetized on the surface in the axial direction, and opposite to the rotating body in the radial direction and the same as the magnetized cylindrical rotating body. The magnetic drive mechanism according to claim 5 or 6, further comprising a rotation assisting means comprising a rotating body cover magnetized on the magnetic pole.

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