JP2008054374A - Magnetic drive mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnetic drive mechanism which reduces the magnetic resistance generated among permanent magnets and which also extracts smooth drive. <P>SOLUTION: This magnetic drive mechanism uses a plurality of permanent magnets and displaces the positions of the plurality of permanent magnets to the movable body, consisting of other permanent magnets, by a rotating means or a sliding means; and causes the movable body to slide or turn, by changing the magnetic poles of the plurality of permanent magnets and the permanent magnets of the movable body alternately. The mechanism comprises a rotation auxiliary means provided on the axis of the rotating means, a rotating magnet, and a movable magnet provided opposite to the rotating magnet. The rotation auxiliary means consists of a weight provided on the circumference of a disc, and the load of the weight is approximately equal to the magnetic resistance by the rotating magnet and the movable magnet. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a magnetic drive mechanism that converts driving of a permanent magnet into reciprocating motion or rotational motion.

  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 in the circumferential direction, support means for supporting the movable body, and rotation that generates a rotating magnetic field passing 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).

JP-A-9-121530

  However, in the case of the linear actuator proposed in the above-mentioned Patent Document 1, when a rotating magnetic field is generated in a ring-shaped permanent magnet, a magnetic resistance that is opposite to the rotating direction is generated, and this magnetoresistive is opposed. Rotational force was required, and a great burden was placed on the motor which is a rotating magnetic field generating means.

  The present invention has been made in view of the above problems, and a plurality of permanent magnets are used, and the positions of the plurality of permanent magnets with a movable body made of other permanent magnets are displaced by rotating means or sliding means. In the magnetic drive mechanism that alternately changes the magnetic poles of the plurality of permanent magnets and the permanent magnet of the movable body to slide or rotate the movable body, the magnetic resistance generated between the permanent magnets is reduced and smooth An object of the present invention is to provide a magnetic drive mechanism for taking out the drive. Here, as a driving method of the permanent magnet, not only the rotating means but also rotating means and further reciprocating means are used, and as means for reducing the magnetic resistance generated between the permanent magnets and taking out smooth driving, Not only rotation assistance by weight but also assistance by magnetic force of opposing magnets, or a combination of weight and magnetic force is used.

  For this reason, the mechanism of the present invention comprises a rotation means, a rotation auxiliary means provided on the axis of the rotation means, a rotation magnet, and a movable magnet provided to face the rotation magnet. The rotation assisting means comprises a disc body and a weight provided on the circumference of the disc body, and the load of the weight is substantially equal to the magnetoresistive force generated by the rotation magnet and the movable magnet. Is the first feature.

  Further, the movable magnet comprises a rotation means, a rotation auxiliary means provided on the axis of the rotation means, a rotation magnet, and a movable magnet provided to face the rotation magnet, and the rear end of the movable magnet The rotating magnet is rotated in conjunction with the rotating magnet, and a magnet having the opposite magnetism to the rotating magnet is further provided opposite to the rotating magnet. The rotating means is a pendulum motion by a reciprocating rotating mechanism of a rotary solenoid. The second feature is that the opposing rotating magnets are rotated by the pendulum movement, and the movable magnet is slid.

  The housing is slid by the sliding means, the fixed magnets are provided at the front and rear portions in the sliding direction of the housing, and the front and rear portions of the housing are opposed to the fixed magnets. A fixed magnet provided; a shaft that passes through the sliding direction of the housing; and a disc that is rotatably attached to the shaft, and a plurality of different polarities provided on both sides of the disc. And a magnet provided on the disc by sliding the casing by the sliding means, and a fixed magnet provided on the front and rear parts of the casing to face the fixed magnet. The third feature is that the disk is rotated by suction and repulsion.

The magnetic drive mechanism according to the present invention has the following excellent effects.
(1) The rotation assist means provided on the axis of the rotation means includes a disk body and a weight provided on the circumference of the disk body, and a magnetic resistance by the weight, the rotation magnet, and the movable magnet. Since the force is substantially the same, there is no burden on the rotating means.
(2) Since the magnets having the opposite magnetism to the magnetism of the rotating magnets are provided facing each other, the opposing rotating magnets are rotated by a pendulum motion, and the movable magnets are slid, so that they face each other. Since the magnetic resistance is reduced by the balance of the magnetic force between the magnets and the weight as the rotation assisting means, smooth sliding can be taken out.
(3) By sliding the casing by the sliding means, the magnets provided on both sides of the disc in the casing and the fixing provided on the front and rear of the casing so as to face the fixed magnets. Since the disk can be rotated by attracting and repelling the magnet, the sliding reciprocating motion of the magnet can be taken out as a rotational drive, and by arranging the magnets at the front and rear of the casing, The magnetic resistance in the reciprocating motion can be reduced.

  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 an explanatory side sectional view showing a magnetic drive mechanism according to a first embodiment of the present invention, FIG. 2 is an enlarged explanatory view of a disk body, and FIG. 3 is an explanatory view for explaining the balance between weight and magnetic resistance. 4 is a perspective view of the magnetic drive mechanism according to the second embodiment, FIG. 5 is an explanatory view of the operation of FIG. 4, FIG. 6 is an explanatory view of the operation of the magnetic drive mechanism according to the third embodiment, and FIG. FIG.

  As shown in FIGS. 1 and 2, a magnetic drive mechanism 1 according to the present invention includes a disc body 5, a rotating magnet 6, and a movable magnet on a rotating shaft 3 of a motor 2 that is a rotating means via a rotating bearing 4. 7 are provided in order, and the movable magnet 7 is slidably held on the track 9 via the guide 8.

  The rotating magnet 6 and the movable magnet 7 are respectively magnetized in the vertical direction, the magnetization directions are the same, repel, and attract in the reverse direction. A weight 10 is provided on the circumference of the disk body 5 and assists the rotation of the motor 2 against the magnetic resistance described later. The sliding of the guide 8 is restricted by the stopper 11.

  When the motor 2 is rotated clockwise from the state of FIG. 1 to rotate the rotating magnet 6 by 0 to 180 degrees, the magnetic directions of the rotating magnet 6 and the movable magnet 7 become the same, and the movable magnet 7 slides on the track 9. Move to move right in the drawing. At this time, a magnetic resistance is generated between the rotating magnet 6 and the movable magnet 7, a load in the direction opposite to the rotation of the motor 2 is generated, and a large load is applied to the rotating shaft 3. Therefore, a weight 10 against the magnetic resistance is attached on the periphery of the rotating plate 5 so that the magnetic resistance (reverse direction) 12 and the weight resistance (forward direction) 14 are balanced as shown in FIG. The load on is reduced.

  Similarly, when the rotary magnet 6 is rotated 180 to 360 degrees by the right rotation of the motor 2, the magnetic direction of the rotary magnet 6 is opposite to the magnetic direction of the movable magnet 7, and the movable magnet 7 is attracted and magnetic resistance (forward) Direction) 13 and weight resistance (reverse direction) 15 are generated, and the load on the rotary shaft 3 is reduced by the balance between the resistances. As a result, the rotation of the motor 2 is smoothly transmitted, and the sliding of the movable magnet 7 is also smooth. Here, the diameter of the disc body 5 and the weight of the weight 10 are appropriately selected and determined according to the magnetic resistance value generated around the rotating shaft 3.

  According to the magnetic drive mechanism of the present invention having the above configuration, the magnetic resistance generated between the rotating magnet and the movable magnet can be canceled and reduced by the weight provided on the rotating plate. The load is reduced and the movable magnet can be smoothly slid.

  Next, Embodiment 2 will be described with reference to FIGS. FIG. 4 is a perspective view of the magnetic drive mechanism according to the present invention, and FIG.

  As shown in FIG. 4, the magnetic drive mechanism 1a according to the present invention uses a rotary solenoid 16 as a rotating mechanism, and a pendulum body 19, a rotating magnet A20, A movable magnet 7a and a rotating magnet B21 are provided in this order, and the movable magnet 7A is slidably held on the track 9a via a guide 8a. The rotating magnet A20 and the rotating magnet are driven by a reciprocating pendulum driven by a rotary solenoid 16. B21 rotates in conjunction with it, and the movable magnet 7a sandwiched between the rotating magnet A20 and the rotating magnet B21 is simultaneously attracted and repelled by the displacement of the magnetic pole described later, and slides on the track 9a. The reciprocating drive by this sliding is output by the output shaft 22.

  The pendulum body 19 provided between the bearings 18 is provided with a weight 10a at its tip, and this weight 10a is rotated by the magnetic resistance between the two rotating magnets 20, 21 and the movable magnet 7a. The load applied to the shaft 17 is reduced, and the rotation by the rotary solenoid 16 is assisted. The sliding position of the guide 8a of the movable magnet 7a is regulated by stoppers 11a provided at both ends of the track 9a.

  Next, the operation of the magnetic drive mechanism 1a according to the present invention will be described with reference to FIG. FIG. 5A shows a state in which the pendulum body 19 is rotated 45 degrees counterclockwise, and FIG. 5B shows a state in which the pendulum body 19 is also rotated 45 degrees clockwise. In the figure, the rotating magnet A20, the rotating magnet B21, and the movable magnet 7a are respectively magnetized with N-pole 23 and S-pole 24 at predetermined intervals along the circumference, and the magnetizing positions of the rotating magnet A20 and the rotating magnet B21. Are in different positions. In the description of this operation, the description will be made assuming that the magnetic arrangement is two each for the N pole and the S pole.

  In FIG. 5A, the movable magnet 7a and the rotating magnet A20 have different magnetic poles N and S facing each other and are in an attracting state. On the other hand, the rotating magnet B has the same magnetic pole as the movable magnet 7a, and is repelled. Next, as shown in FIG. 6B, when the rotating magnets A20 and B21 are rotated 90 degrees clockwise, the magnetic poles of the rotating magnets A20 and B21 are opposite to the magnetic poles of the movable magnet 7A. The movable magnet 7a moves toward the rotating magnet B21. Similarly, when the rotating magnets A and B are rotated 90 degrees counterclockwise, the movable magnet 7a moves toward the rotating magnet A21.

  Here, when the rotating magnet A20 is rotated clockwise from FIG. 5A to FIG. 5B, the magnetic resistance is counterclockwise on the rotating shaft 17 between the movable magnet 7a and the rotating magnet A20. In addition, a magnetic resistance is generated clockwise between the rotating magnet B21 and the movable magnet 7a. The weight 10a provided at the tip of the pendulum body 19 supplements the difference between the magnetic resistances, thereby balancing the magnetic resistances and assisting the rotation by the rotary solenoid 16. The size of the pendulum body 19 and the weight of the weight 10a are appropriately selected and determined according to the magnetic force of the rotating magnet and the movable magnet and the position where the pendulum body 19 is disposed.

  According to the magnetic drive mechanism of the present invention configured as described above, the magnetic resistance generated between the rotating magnet and the movable magnet can be reduced by the balance between the magnetism between the rotating magnets and the weight provided on the pendulum body. Therefore, the load on the rotary shaft of the rotary solenoid can be reduced and the movable magnet can be smoothly slid.

  A third embodiment of the magnetic drive mechanism of the present invention will be described with reference to FIGS. 6 (a) and 6 (b) are diagrams for explaining the operation of the magnetic drive mechanism of the present embodiment. The magnetic drive mechanism 1b includes a housing 25 that can be slid through the rotation shaft 3b at the center, A fixed magnet 26 disposed at a predetermined position before and after the housing 25, a fixed magnet 27 provided at the front and rear of the housing 25, and a shaft attached to the rotary shaft 3b. And a rotating mechanism 5b, a rotating mechanism 6b, 6c provided on both sides of the rotating body 5b, and a solenoid 28 that slides the casing 25 in the axial direction of the rotating shaft 3b. Attraction and repulsion occur between the magnetic poles of the fixed magnet 26 and the rotating magnets 6b and 6c that slide with the sliding of the housing 25 by 28, and the rotating body 5b rotates and is rotated and output to the rotating shaft 3b. At this time, the rotating body 5b is always rotated in a fixed direction by a rotation direction determining magnet 29 described later. The fixed magnet 26 is fixed by a fixing device (not shown), and the housing 25 is slidably held by a sliding guide (not shown). The fixed magnet 26 and the fixed magnet 27 provided in the housing 25 are provided with the same magnetic poles facing each other.

  The casing 25 is made of a frame made of a lightweight metal such as aluminum, and the rotation shaft 3b is inserted in a center position of the opposing surface so as to be rotatable and slidable. 26 are provided to face each other. An aluminum rotator 5b having rotating magnets 6b and 6c attached to both surfaces is pivotally attached to a substantially central portion of the rotating shaft 3b, and the rotating shaft 3b is rotated by rotation of the rotating body 5b described later.

  Next, the operation of the magnetic drive mechanism 1b according to the present invention will be described with reference to FIGS. FIG. 7 shows the magnet arrangement in the direction of the arrow of the magnetic drive mechanism 1b of FIG. 6A. The fixed magnets 26 each show an N pole 23, and fixed magnets 27 provided at the front and rear of the housing 25. Respectively indicate the S poles 24. The central rotating magnets 6b and 6C are magnetized with an S pole 24 and an N pole 23, respectively. A rotation direction determining magnet 29 is formed by the magnetization of the N pole 23.

  First, when the casing 25 shown in FIG. 6A is driven to the position shown in FIG. 6B by driving the solenoid 28, the rotating magnet 6 c facing the fixed magnet 26 becomes N of the fixed magnet 26. Attraction and repulsion are generated by the pole 23, and the rotating body 5b is rotated 90 degrees clockwise by the rotation direction determining magnet 29. Next, when the solenoid 28 is driven and the casing 25 is slid to the position shown in FIG. 6A, the N pole 23 of the fixed magnet 26 facing the rotating magnet 6b causes attraction and repulsion, and the rotating body 5b is moved. Further, rotate 90 degrees clockwise. By repetitive sliding of the solenoid 28, the rotating body 5b rotates and the rotating shaft 3b can always rotate in a fixed direction.

  Further, the magnetic resistance generated when the rotating body 5b rotates is caused by the repulsion between the fixed magnets 26 arranged at the front and rear of the casing 25 and the fixed magnets 27 provided at the front and rear of the casing 25, and the rotating magnet 6b. Alternatively, a balance is achieved by the attraction between 6c and the fixed magnet 27 of the casing 25, and the load applied to drive the solenoid 28 is reduced.

  According to the magnetic drive mechanism of the present invention configured as described above, the magnetic resistance generated between the rotating magnet and the fixed magnet is caused by the balance between the repulsion of the magnetic force between the fixed magnets and the attractive force between the rotating magnet and the fixed magnet. Since it can be reduced, the load applied to the solenoid is reduced, and the rotating body and the rotating shaft can be smoothly rotated.

  As described above, the magnetic drive mechanism according to the present invention uses a plurality of permanent magnets, and displaces the plurality of permanent magnets with a movable body made of other permanent magnets by rotating means or sliding means. Magnetic drive mechanism that reduces the magnetic resistance between permanent magnets and extracts smooth drive in a magnetic drive mechanism that slides or rotates the movable body by alternately changing the magnetic poles of the permanent magnet and the permanent magnet of the movable body A mechanism can be provided.

  The magnetic drive mechanism according to the present invention can be effectively used not only as a conventional linear actuator but also as various generators and motors.

It is side sectional explanatory drawing which shows the magnetic drive mechanism which concerns on 1st Example of this invention. It is expansion explanatory drawing of a disc body. It is explanatory drawing explaining the balance of a weight and a magnetic resistance. It is a perspective view of the magnetic drive mechanism which concerns on 1st Example of this invention. It is operation | movement explanatory drawing of FIG. It is operation | movement explanatory drawing which shows the 3rd Example of this invention. It is magnet arrangement explanatory drawing of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1a, 1b Magnetic drive mechanism 2 Motor 3, 3b Rotating shaft 4, 4b Rotating bearing 5, 5b Disc body 6, 6b, 6c Rotating magnet 7, 7b Movable magnet 8, 8a Guide 9, 9a Track 10, 10a Weight 11 Stopper 12 Magnetoresistive (reverse method)
13, 13b Magnetoresistive (forward method)
14, 14a Weight resistance (reverse direction)
15, 15b Weight resistance (forward direction)
16 Rotary solenoid 17, 17a Rotating shaft 18, 18a Rotating bearing 19 Pendulum body 20 Rotating magnet A
21 Rotating magnet B
22 Output shaft 23 N pole 24 S pole 25 Case 26 Fixed magnet 27 Fixed magnet 28 Solenoid 29 Magnet for determining rotation direction

Claims (3)

  A plurality of permanent magnets are used, and the positions of the plurality of permanent magnets with a movable body made of other permanent magnets are displaced by rotating means or sliding means, and the magnetic poles of the plurality of permanent magnets and the permanent magnet of the movable body Is a magnetic drive mechanism for sliding or rotating the movable body by alternately changing the rotation assisting means provided on the axis of the rotation means, the rotation magnet, and the rotation magnet. The rotation assisting means includes a disc body and a weight provided on the circumference of the disc body, and the load of the weight is the rotation magnet and the movable magnet. Magnetic drive mechanism characterized by being substantially equivalent to the magnetic resistance force by   A plurality of permanent magnets are used, and the positions of the plurality of permanent magnets with a movable body made of another permanent magnet are displaced by rotating means or sliding means, and the magnetic poles of the plurality of permanent magnets and the permanent magnet of the movable body Is a magnetic drive mechanism that slides or rotates the movable body by alternately changing the rotation assisting means, the rotation magnet, and the rotation magnet provided on the axis of the rotation means. A movable magnet provided on the rear end side of the movable magnet in conjunction with the rotating magnet, and further provided with a magnet opposite to the magnetism of the rotating magnet. The rotating means is a pendulum movement by a reciprocating rotation mechanism of a rotary solenoid, and the opposing rotating magnet is rotated by the pendulum movement to slide the movable magnet.   A plurality of permanent magnets are used, and the positions of the plurality of permanent magnets with a movable body made of other permanent magnets are displaced by rotating means or sliding means, and the magnetic poles of the plurality of permanent magnets and the permanent magnet of the movable body Is a magnetic drive mechanism for sliding or rotating the movable body by alternately changing, and provided in a casing that is slid by the sliding means, and a front part and a rear part of the casing in a sliding direction. A fixed magnet provided at a front portion and a rear portion of the housing so as to face the fixed magnet, and a shaft through which the sliding direction of the housing is inserted, and is rotatable on the shaft. An attached disc and a plurality of magnets with different polarities provided on both sides of the disc, the casing is slid by the sliding means, the magnet provided on the disc, and Attraction with a fixed magnet provided opposite to the fixed magnet at the front and rear of the housing The outgoing, magnetic drive mechanism, characterized in that rotating the disc.

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