JP2012163206A - Magnetic coupling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnetic coupling device with which torque of a driven side part with respect to a change in a relative position relationship with a drive side part can be easily regulated to a predetermined torque characteristic.SOLUTION: The magnetic coupling device 100 includes: a motor side rotating body 10 including magnet parts 12 and 13 having a mutually different number of magnetic poles; magnet parts 22 and 23 having the corresponding number of magnetic poles to the magnet parts 12 and 13, which magnetically couple with the magnet parts 12 and 13 in an opposed state, respectively; and a load side rotating body 20 arranged at a predetermined interval from the motor side rotating body 10, which is composed so that torque is generated by the drive of the motor side rotating body 10 in a non-contact state.

Description

  The present invention relates to a magnetic coupling device, and more particularly to a magnetic coupling device including a driven side portion configured to generate torque in a non-contact state by driving of a driving side portion.

  2. Description of the Related Art Conventionally, a magnetic coupling device including a driven side portion configured to generate torque in a non-contact state by driving a driving side portion is known (see, for example, Patent Documents 1 and 2).

  Patent Document 1 includes a cylindrical outer unit that includes a recess and is configured to be rotatable about a rotation axis, and is disposed in the recess of the outer unit and is configured to be rotatable about the same rotation axis as the outer unit. A cylindrical magnetic coupling device comprising a cylindrical inner unit is disclosed. In this cylindrical magnetic coupling device, the outer ring magnet is circumferentially arranged on the inner circumferential surface of the recess of the outer unit, and the inner ring magnet is circumferentially arranged so as to be magnetically coupled to the outer ring magnet on the outer circumferential surface of the inner unit. Is arranged. The length of the outer ring magnet in the direction in which the rotation axis extends is configured to be greater than the length in the direction in which the rotation axis of the inner ring magnet extends. Although not clearly described in Patent Document 1, it is considered that the torque characteristics of the inner unit change sinusoidally with respect to the amount of change in the rotation angle (twist angle) of the outer unit.

  Further, the above-mentioned Patent Document 2 includes a cylindrical drive side shaft that includes a recess and is configured to be rotatable about a rotation axis, and is disposed in the recess of the drive side shaft and is configured to be rotatable about the rotation axis. In addition, a magnetic coupling having a cylindrical driven side shaft is disclosed. This magnetic coupling is configured to correct the non-uniform state of the magnetic field by shifting the rotational axis of the driven side axis in the radial direction with respect to the rotational axis of the driving side axis. In addition, a weight is arranged at a predetermined position of the driven side shaft so as to correct the uneven mass state caused by the mutual displacement of the rotation axes. Although not clearly described in Patent Document 2, it is considered that the torque characteristic of the driven side shaft changes sinusoidally with respect to the amount of change in the rotation angle (twist angle) of the driving side shaft.

JP 2001-99194 A JP 2001-165189 A

  However, the cylindrical magnetic coupling device disclosed in Patent Document 1 is configured such that the torque characteristics of the inner unit have a waveform different from a sinusoidal waveform with respect to changes in the rotation angle (twisting angle) of the outer unit. There is an inconvenience that can not be done. For this reason, there is a problem that it is difficult to adjust the torque of the inner unit with respect to the change in the rotation angle of the outer unit to a predetermined torque characteristic other than the torque characteristic having a sine wave shape.

  Further, the magnetic coupling disclosed in Patent Document 2 is configured such that the torque characteristic of the driven side shaft has a waveform different from a sinusoidal shape with respect to a change in the rotation angle (twist angle) of the driving side shaft. There is an inconvenience that can not be done. For this reason, there is a problem that it is difficult to adjust the torque of the driven side shaft with respect to the change in the rotation angle of the driving side shaft to a predetermined torque characteristic other than the torque characteristic having a sine wave shape.

  The present invention has been made in order to solve the above-described problems, and one object of the present invention is to easily increase the torque of the driven side portion with respect to a change in the relative positional relationship with the driving side portion. A magnetic coupling device capable of adjusting to a predetermined torque characteristic is provided.

  A magnetic coupling device according to one aspect of the present invention includes a drive side portion including a first magnet portion and a second magnet portion having different numbers of magnetic poles, and a number of magnetic poles corresponding to the first magnet portion and the second magnet portion, respectively. And includes a third magnet portion and a fourth magnet portion that are magnetically coupled in a state of facing the first magnet portion and the second magnet portion, respectively, and is disposed at a predetermined interval from the drive side portion, and the drive side portion And a driven side portion configured to generate torque in a non-contact state by driving.

  In the magnetic coupling device according to one aspect of the present invention, as described above, the first magnet portion and the second magnet portion having different numbers of magnetic poles are provided on the driving side portion, and the first magnet portion is provided on the driven side portion. And a third magnet part having a number of magnetic poles corresponding to the second magnet part, and a third magnet part having a number of magnetic poles corresponding to the first magnet part. Between the second magnet part having a different number of magnetic poles from the first magnet part and the fourth magnet part having the number of magnetic poles corresponding to the second magnet part. A torque characteristic different from the sine wave shape obtained by synthesizing the sinusoidal torque characteristic by the coupling can be obtained. Thereby, by arbitrarily selecting the number of magnetic poles of the first magnet part and the third magnet part and the number of magnetic poles of the second magnet part and the fourth magnet part, the relative position with respect to the drive side part can be easily obtained. The torque (synthetic torque) of the driven side with respect to the change in the relationship can be adjusted to a predetermined torque characteristic different from the sine wave shape.

  In the magnetic coupling device according to the above aspect, it is preferable that the number of magnetic poles of the first magnet unit and the third magnet unit, the second magnet unit, and the fourth magnet so that desired torque characteristics can be obtained at the driven side unit. The number of magnetic poles of the part is selected. If comprised in this way, desired torque (synthesis | combination) in a driven side part by selecting suitably the number of magnetic poles of 1 magnet part and 3rd magnet part, and the number of magnetic poles of 2nd magnet part and 4th magnet part. Torque) can be easily generated.

  In this case, preferably, the number of magnetic poles of the second magnet part and the fourth magnet part is an integer multiple of 2 or more of the number of magnetic poles of the first magnet part and the third magnet part. If comprised in this way, the torque characteristic (waveform) of the driven side part with respect to the change of the relative positional relationship with a drive side part will be based on the torque characteristic obtained based on the first magnet part and the third magnet part. As described above, the torque characteristic obtained based on the second magnet part and the fourth magnet part can be used to adjust the torque characteristic to a predetermined value. Thereby, the torque (synthetic torque) of the driven side portion can be adjusted to a predetermined torque characteristic more easily.

  In the magnetic coupling device in which the number of magnetic poles is selected so as to obtain the desired torque characteristic, preferably, the first torque generated between the first magnet unit and the third magnet unit, and the second magnet unit The second torque generated between the first magnet portion and the fourth magnet portion is combined to generate a combined torque on the driven side portion, and the relative relationship between the first magnet portion and the third magnet portion. The amount of change in the combined torque with respect to the change in the relative positional relationship between the second magnet portion and the fourth magnet portion is smaller than the amount of change in the first torque and the amount of change in the second torque. The combination of the number of magnetic poles of the first magnet part and the third magnet part and the number of magnetic poles of the second magnet part and the fourth magnet part is selected. If comprised in this way, since the fluctuation | variation of the synthetic | combination torque of a driven side part with respect to the change of the relative positional relationship with a drive side part can be suppressed, the relative positional relationship with respect to the drive side part of a driven side part is Even when it changes, it is possible to obtain a torque characteristic capable of suppressing fluctuations in the operating speed of the driven side portion.

  In the magnetic coupling device in which the change amount of the combined torque is smaller than the change amount of the first torque and the change amount of the second torque, the change amount of the combined torque in the vicinity of the rated torque is preferably a combination other than the vicinity of the rated torque. A combination of the number of magnetic poles of the first magnet part and the third magnet part and the number of magnetic poles of the second magnet part and the fourth magnet part is selected so as to be smaller than the amount of change in torque. By configuring in this way, fluctuations in the combined torque in the vicinity of the rated torque can be suppressed, so even when the relative positional relationship of the driven side portion with respect to the drive side portion changes, the driven side in the vicinity of the rated torque Torque characteristics that can effectively suppress fluctuations in the operation speed of the part can be obtained.

  In the magnetic coupling device in which the number of magnetic poles is selected so as to obtain the desired torque characteristic, preferably, the relative positional relationship between the first magnet portion and the third magnet portion, and the second magnet portion and the fourth magnet portion. The magnetic poles of the first magnet unit and the third magnet unit so that the amount of change in the combined torque relative to the change in the relative positional relationship with the magnet unit is greater than the amount of change in the first torque and the amount of change in the second torque. The combination of the number and the number of magnetic poles of the second magnet part and the fourth magnet part is selected. With this configuration, the fluctuation in the combined torque of the driven side with respect to the change in the relative positional relationship with the drive side can be increased, so even if the change in the relative positional relationship is small, the driven side It is possible to generate a sufficient combined torque corresponding to the load fluctuations at the same time.

  In the magnetic coupling device according to the above aspect, the number of magnetic poles of the first magnet unit and the third magnet unit is preferably smaller than the number of magnetic poles of the second magnet unit and the fourth magnet unit, and the first magnet unit and the first magnet unit The area of the area where the three magnet parts are opposed is larger than the area of the area where the second magnet part and the fourth magnet part are opposed. According to this structure, the torque of the driven side portion with respect to the change in the relative positional relationship with the driving side portion is increased by increasing the area of the opposed regions of the first magnet portion and the third magnet portion having a small number of magnetic poles. The characteristics (waveform) should be easily adjusted by the torque characteristics of the second magnet section and the fourth magnet section having a large number of magnetic poles, with the torque characteristics of the first magnet section and the third magnet section having a small number of magnetic poles as a reference. Can do. Thereby, the torque (synthetic torque) of the driven side portion can be adjusted to a predetermined torque characteristic more easily.

  In the magnetic coupling device according to the above aspect, the number of magnetic poles of the first magnet unit and the third magnet unit is preferably 4 poles, and the number of magnetic poles of the second magnet unit and the fourth magnet unit is 20 poles. is there. If comprised in this way, relative to a drive side part from the 1st magnet part and 3rd magnet part which have the number of magnetic poles of 4 poles, and the 2nd magnet part and 4th magnet part which have the number of magnetic poles of 20 poles It is possible to adjust the torque (synthetic torque) on the driven side with respect to a change in the general positional relationship to a predetermined torque characteristic.

  In the magnetic coupling device according to the above aspect, preferably, in a stopped state, at least one of the center position of the magnetic pole of the first magnet section and the center position of the magnetic pole of the second magnet section corresponds to the corresponding third magnet section. The magnetic poles are arranged so as to deviate from the center position of the magnetic pole and the center position of the corresponding magnetic pole of the fourth magnet portion. If comprised in this way, the torque characteristic by the magnetic coupling between a 1st magnet part and a 3rd magnet part, or a 2nd magnet part and a 4th magnet part by shifting the center positions of the opposing magnetic poles At least one of the torque characteristics due to the magnetic coupling between the two and the torque characteristics different from the torque characteristics when the center position is not shifted can be obtained. Thereby, more various torque characteristics can be obtained.

  In the magnetic coupling device according to the above aspect, preferably, the strength of the magnetic field between the first magnet portion and the third magnet portion and the strength of the magnetic field between the second magnet portion and the fourth magnet portion. A yoke that can adjust at least one of them is further provided. If comprised in this way, by adjusting the intensity | strength of a magnetic field using a yoke, the magnetic coupling between a 1st magnet part and a 3rd magnet part, or a 2nd magnet part and a 4th magnet part More diverse torque characteristics can be obtained in at least one of the magnetic couplings.

  In the magnetic coupling device according to the above aspect, preferably, the driving side portion is configured to be rotatable around the rotation axis, and the driven side portion is disposed at a predetermined interval from the driving side portion and driven. The first magnet part and the second magnet part, and the third magnet part and the fourth magnet part are both the first magnet and are configured to be rotatable around the rotation axis in a non-contact state by rotation of the side part. And the third magnet part are arranged in a direction opposite to each other and in a direction orthogonal to the direction in which the second magnet part and the fourth magnet part face each other. In such a magnetic coupling device in which torque is transmitted around the rotation axis, the drive side portion is provided with a first magnet portion and a second magnet portion having different numbers of magnetic poles, and the driven side portion is provided with a first magnet portion. By providing the third magnet part and the fourth magnet part having the number of magnetic poles corresponding to each of the second magnet part, the number of magnetic poles of the first magnet part and the third magnet part, and the second magnet part and the fourth magnet part In the magnetic coupling device in which torque is easily transmitted around the rotation axis, the combined torque of the driven side with respect to the change in the angle relative to the drive side The torque characteristics can be adjusted.

  In this case, preferably, the driven side portion is disposed at a predetermined interval from the driving side portion in the radial direction orthogonal to the rotation axis, and the first magnet portion, the second magnet portion, the third magnet portion, and Both the fourth magnet parts are arranged in a direction along the rotation axis. With this configuration, in the magnetic coupling device in which the driving side portion and the driven side portion face each other in the radial direction, the combined torque around the rotation axis of the driven side portion can be easily adjusted to a predetermined torque characteristic. it can.

  In the magnetic coupling device according to the first aspect, preferably, the drive side portion further includes a fifth magnet portion having a number of magnetic poles different from the number of magnetic poles of the first magnet portion and the number of magnetic poles of the second magnet portion, and is driven. The side portion has a number of magnetic poles corresponding to the fifth magnet portion, and further includes a sixth magnet portion that performs magnetic coupling in a state of facing the fifth magnet portion. If comprised in this way, the state of the magnetic coupling between a 1st magnet part and a 3rd magnet part, the state of the magnetic coupling between a 2nd magnet part and a 4th magnet part, and a 5th magnet A torque characteristic different from a sine wave shape obtained by synthesizing a sinusoidal torque characteristic by magnetic coupling between the first magnet part and the sixth magnet part having the number of magnetic poles corresponding to the fifth magnet part can be obtained. As a result, the combined torque of the driven side portion with respect to the change in the relative positional relationship with the driving side portion can be more reliably adjusted to a predetermined torque characteristic different from the sine wave shape.

  In the magnetic coupling device according to the above aspect, preferably, the first magnet portion and the second magnet portion of the driving side portion are the same number of magnets and second magnet portions as the number of magnetic poles of the first magnet portion, respectively. The third magnet portion and the fourth magnet portion of the driven side portion are composed of the same number of magnets as the number of magnetic poles. It consists of the same number of magnets. If comprised in this way, when manufacturing a drive side part and a driven side part, since the magnet previously magnetized by one magnetic pole can be used, it magnetizes after an assembly of a drive side part and a driven side part. Compared to the case, the magnet can be reliably magnetized.

  In the magnetic coupling device according to the above aspect, preferably, each of the driving side portion and the driven side portion is composed of one magnet, and each of the first magnet portion and the second magnet portion of the driving side portion is one. When the magnet is magnetized in multiple poles, each of the magnets is composed of a plurality of first magnetized parts having the same number as the number of magnetic poles of the first magnet part and a plurality of second magnetized parts having the same number of magnetic poles as the second magnet part. The third magnet portion and the fourth magnet portion of the driven side portion are formed by a plurality of third magnetized portions and first magnets having the same number as the number of magnetic poles of the third magnet portion, respectively, when one magnet is magnetized with multiple poles. It consists of a plurality of fourth magnetized portions having the same number as the number of magnetic poles of the four magnet portions. With this configuration, a single magnet can be magnetized at once (multi-pole magnetization) so as to have a plurality of magnetic poles, thus simplifying the manufacturing process of the driving side portion and the driven side portion. can do.

  According to the present invention, as described above, the torque (synthetic torque) of the driven side with respect to the change in the relative positional relationship with the driving side can be easily adjusted to a predetermined torque characteristic different from the sine wave shape. Can do.

1 is a cross-sectional view illustrating a magnetic coupling device according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view of the magnetic coupling device in a stopped state along the line 2000-2000 in FIG. 1. FIG. 3 is a cross-sectional view of the magnetic coupling device in a stopped state along line 3000-3000 in FIG. 1. FIG. 2 is a cross-sectional view of the magnetic coupling device in a twisted rotation state along the line 2000-2000 in FIG. FIG. 3 is a cross-sectional view of the magnetic coupling device in a twisted rotation state along line 3000-3000 in FIG. 1. It is the figure which showed the torque characteristic of the magnetic coupling apparatus by 1st Embodiment of this invention. It is sectional drawing of the magnetic coupling apparatus in the stop state along the 3000-3000 line | wire of FIG. 1 by the 1st modification of 1st Embodiment of this invention. It is the figure which showed the torque characteristic of the magnetic coupling apparatus by the 1st modification of 1st Embodiment of this invention. FIG. 4 is a cross-sectional view of a magnetic coupling device in a stopped state along the line 3000-3000 in FIG. 1 according to a second embodiment of the present invention. It is the figure which showed the torque characteristic of the magnetic coupling apparatus by 2nd Embodiment of this invention. It is sectional drawing which showed the magnetic coupling apparatus by 3rd Embodiment of this invention. FIG. 12 is a cross-sectional view of the magnetic coupling device in a stopped state along line 4000-4000 in FIG. 11. It is sectional drawing in the state which rotated the 2nd magnet part along the 4000-4000 line of FIG. It is sectional drawing in the state which rotated the 2nd magnet part along the 4000-4000 line | wire of FIG. 11, and was torsionally rotated. It is the figure which showed the torque characteristic in the state which rotationally moved the 2nd magnet part in one direction in the magnetic coupling apparatus by 3rd Embodiment of this invention. It is the figure which showed the torque characteristic in the state which rotated the 2nd magnet part in the other direction in the magnetic coupling apparatus by 3rd Embodiment of this invention. FIG. 6 is a cross-sectional view showing a magnetic coupling device according to a fourth embodiment of the present invention. FIG. 18 is a cross-sectional view of the magnetic coupling device in a stopped state along the line 5000-5000 in FIG. 17. It is sectional drawing in the state which rotated the yoke along the 5000-5000 line | wire of FIG. It is the figure which showed the torque characteristic in the magnetic coupling apparatus of the state of FIG. It is sectional drawing which showed the magnetic coupling apparatus by 5th Embodiment of this invention. It is sectional drawing of the magnetic coupling apparatus in the stop state along the 6000-6000 line of FIG. It is the figure which showed the torque characteristic of the magnetic coupling apparatus by 5th Embodiment of this invention. It is the figure which showed the torque characteristic of the magnetic coupling apparatus by the 1st modification of 5th Embodiment of this invention. FIG. 22 is a cross-sectional view of the magnetic coupling device in a stopped state along the line 7000-7000 in FIG. 21 according to a second modification of the fifth embodiment of the present invention. It is the figure which showed the torque characteristic of the magnetic coupling apparatus by the 2nd modification of 5th Embodiment of this invention. It is the side view which showed the magnetic coupling apparatus by the 2nd modification of 1st Embodiment of this invention. It is the front view which showed the magnetic coupling apparatus by the 2nd modification of 1st Embodiment of this invention. It is sectional drawing which showed the magnetic coupling apparatus by the 3rd modification of 1st Embodiment of this invention. It is the expanded sectional view which showed the magnetic coupling apparatus by the 4th modification of 1st Embodiment of this invention. It is the perspective view which showed the magnetic coupling apparatus by the 5th modification of 1st Embodiment of this invention. It is the perspective view which showed the magnetic coupling apparatus by the 3rd modification of 5th Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
First, the structure of the magnetic coupling device 100 according to the first embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the magnetic coupling device 100 according to the first embodiment of the present invention includes a motor side portion 1 to which a driving force is transmitted from a driving portion such as a motor (not shown), and a driving force from the motor side portion 1. The load side portion 2 transmits the driving force to a load portion (not shown) including a driven portion and the like. Further, the rated torque at the load side 2 in the magnetic coupling device 100 is set to be about 0.46 N × m.

  The motor side portion 1 includes a shaft portion 1a in which one end side (X1 side) is connected to a drive source (not shown), and a motor side rotating body provided on the other end portion side (X2 side) of the shaft portion 1a. 10 and so on. The load side portion 2 includes a shaft portion 2a in which one end side (X2 side) is connected to a load portion (not shown) including a drive portion and the like, and a load side rotation provided on the other end side of the shaft portion 2a. Body 20. Further, the shaft portion 1a and the shaft portion 2a are configured to be rotatable about substantially the same rotation axis A extending in the X direction. The motor-side rotating body 10 is an example of the “driving side part” in the present invention, and the load-side rotating body 20 is an example of the “driven side part” in the present invention.

  Further, both the motor-side rotating body 10 and the load-side rotating body 20 are made of a member including a ferromagnetic material such as general carbon steel such as SS400, and have a function as a yoke. Moreover, both the motor side rotating body 10 and the load side rotating body 20 are formed in a cylindrical shape. The motor-side rotating body 10 and the load-side rotating body 20 both have an annular cross-sectional shape centered on the rotation axis A in the XY plane orthogonal to the X direction along the rotation axis A. Yes.

  Further, the motor-side rotating body 10 is formed with a recess 11 having an opening on the X2 side. The recess 11 has an inner side surface 11a extending in the axial direction (X direction). Moreover, the load side rotary body 20 has the outer side surface 21 extended in an axial direction (X direction). The load-side rotator 20 is disposed inside the recess 11 of the motor-side rotator 10 and is spaced from the motor-side rotator 10 in a radial direction (a direction orthogonal to the rotation axis A). Are arranged.

  Magnet portions 12 and 13 are fixed on the X2 side and the X1 side of the inner surface 11a of the recess 11 of the motor-side rotating body 10 so as to be aligned in the X direction along the rotation axis A, respectively. Magnet portions 22 and 23 are fixed on the X2 side and the X1 side of the outer surface 21 of the load-side rotating body 20 so as to be aligned in the X direction along the rotation axis A, respectively. Further, the magnet part 12 and the magnet part 22 are arranged at positions facing each other in the radial direction (direction orthogonal to the rotation axis A), and the magnet part 13 and the magnet part 23 face each other in the radial direction. It is arranged at the position to do. Thereby, the magnet part 12 and the magnet part 22 are magnetically coupled in a state of being opposed to each other in the radial direction, and the magnet part 13 and the magnet part 23 are magnetically coupled in a state of being opposed to each other in the radial direction. It is configured. The magnet parts 12, 13, 22, and 23 are examples of the “first magnet part”, “second magnet part”, “third magnet part”, and “fourth magnet part” of the present invention, respectively.

  Further, the ratio of the length L1 along the X direction of the magnet parts 12 and 22 and the length L2 along the X direction of the magnet parts 13 and 23 is configured to be about 40: 7. That is, the area where the magnet part 12 and the magnet part 22 face each other is larger than the area of the area where the magnet part 13 and the magnet part 23 face each other. Note that the torque (first torque) generated between the magnet unit 12 and the magnet unit 22 is configured to be about 0.8 N × m at the maximum. On the other hand, the torque (second torque) generated between the magnet portion 13 and the magnet portion 23 is configured to be about 0.14 N × m at the maximum.

  Here, in the first embodiment, as shown in FIG. 2, in the magnet unit 12, two magnets 12a preliminarily magnetized to the N pole and two magnets 12b preliminarily magnetized to the S pole are equal. They are alternately arranged circumferentially at an angle (about 90 degrees). That is, the number of magnetic poles of the magnet unit 12 is configured to be four. Further, as shown in FIG. 3, in the magnet portion 13, ten magnets 13a preliminarily magnetized to N poles and ten magnets 13b magnetized to S poles in advance are equiangular (about 18 degrees). Thus, they are alternately arranged in a circumferential manner. That is, the number of magnetic poles of the magnet unit 13 is configured to be 20 poles. Thereby, in the motor side rotating body 10, while the number of magnetic poles of the magnet part 12 (4 poles) differs from the number of magnetic poles of the magnet part 13 (20 poles), the number of magnetic poles of the magnet part 13 (20 poles) It is configured to be 5 times the number of 12 magnetic poles (4 poles).

  As shown in FIG. 2, in the magnet portion 22, two magnets 22a previously magnetized to the S pole and two magnets 22b magnetized to the N pole in advance are equiangular (about 90 degrees). Thus, they are alternately arranged in a circumferential manner. That is, the number of magnetic poles of the magnet unit 22 is configured to be four. As shown in FIG. 3, in the magnet part 23, 10 magnets 23a previously magnetized to the S pole and 10 magnets 23b magnetized to the N pole in advance are equiangular (about 18 degrees). Thus, they are alternately arranged in a circumferential manner. That is, the number of magnetic poles of the magnet part 23 is configured to be 20 poles. Thereby, in the load side rotating body 20, while the number of magnetic poles (4 poles) of the magnet part 22 and the number of magnetic poles of the magnet part 23 (20 poles) are different, the number of magnetic poles of the magnet part 23 (20 poles) The number of magnetic poles is 22 times (4 poles).

  As shown in FIGS. 1 and 2, both the magnets 12 a and 12 b have the same arcuate cross-sectional shape in the YZ plane (see FIG. 2) and are along the rotation axis A. Are arranged to extend in the X direction (see FIG. 1). As shown in FIG. 2, in the magnet 12 a, the N pole is located on the magnet part 22 side and the S pole is located on the opposite side of the magnet part 22 in the radial direction (direction orthogonal to the rotation axis A). Are arranged to be. In the magnet 12b, the S pole is located on the magnet part 22 side and the N pole is located on the opposite side of the magnet part 22 in the radial direction. In FIG. 2, the magnetic poles (N and S) attached to the magnets indicate the magnetic poles on the side where the magnet portions face each other. The same applies to the following drawings (FIGS. 3 to 5, 7, 9, 12 to 14, 18, 19, 22, 25, 28, and 30).

  As shown in FIGS. 1 and 3, the magnets 13 a and 13 b both have the same arcuate cross-sectional shape in the YZ plane (see FIG. 3) and are along the rotation axis A. Are arranged to extend in the X direction (see FIG. 1). As shown in FIG. 3, the magnet 13 a is arranged so that the N pole is located on the magnet portion 23 side and the S pole is located on the opposite side of the magnet 23 in the radial direction. In the magnet 13 b, the S pole is located on the magnet part 23 side and the N pole is located on the opposite side of the magnet part 23 in the radial direction.

  As shown in FIGS. 1 and 2, the magnets 22 a and 22 b both have the same arcuate cross-sectional shape in the YZ plane (see FIG. 2) and are along the rotation axis A. Are arranged to extend in the X direction (see FIG. 1). As shown in FIG. 2, in the magnet 22 a, the S pole is located on the magnet part 12 side and the N pole is located on the opposite side of the magnet part 12 in the radial direction. In the magnet 22b, the N pole is located on the magnet part 12 side and the S pole is located on the opposite side of the magnet part 12 in the radial direction.

  As shown in FIGS. 1 and 3, both the magnets 23 a and 23 b have the same arcuate cross-sectional shape in the YZ plane (see FIG. 3) and along the rotation axis A. Are arranged to extend in the X direction (see FIG. 1). As shown in FIG. 3, the magnet 23 a is arranged so that the south pole is located on the magnet part 13 side and the north pole is located on the opposite side of the magnet part 13 in the radial direction. In the magnet 23b, the N pole is located on the magnet part 13 side and the S pole is located on the opposite side of the magnet part 13 in the radial direction.

  In addition, as shown in FIG. 2, the cross-sectional center position 12c of the magnet 12a and the cross-sectional center position 22c of the magnet 22a extend in the radial direction (the direction orthogonal to the rotation axis A) in the stopped state. While being arranged on a straight line, the N pole side of the magnet 12a and the S pole side of the magnet 22a are arranged to face each other. In the stop state, the cross-sectional center position 12d of the magnet 12b and the cross-sectional center position 22d of the magnet 22b are arranged on a straight line extending in the radial direction, and the S pole side of the magnet 12b The N pole side of the magnet 22b is arranged to face each other. That is, in the stopped state, the magnet portion 12 and the magnet portion 22 are configured such that different magnetic poles face each other in the radial direction. As a result, the torque (first torque) generated between the magnet part 12 and the magnet part 22 having four poles has a maximum value of about 0.8 N × m and a sinusoidal torque with a cycle of about 180 degrees. It is configured to be characteristic. The stopped state is a state in which no driving force is transmitted from the motor side 1 to the load side 2, and the motor side 1 and the load side 2 are completely stopped, The state where the part 1 and the load side part 2 are rotating without resistance at the same speed in the same direction is included.

  In addition, as shown in FIG. 3, in the stopped state, the cross-sectional center position 13c of the magnet 13a and the cross-sectional center position 23c of the magnet 23a are arranged on a straight line extending in the radial direction, The N pole side of the magnet 13a and the S pole side of the magnet 23a are arranged to face each other. In the stopped state, the center position 13d of the sectional shape of the magnet 13b and the center position 23d of the sectional shape of the magnet 23b are arranged on a straight line extending in the radial direction, and the S pole side of the magnet 13b It arrange | positions so that the N pole side of the magnet 23b may mutually face. That is, in the stopped state, the magnet portion 13 and the magnet portion 23 are configured such that different magnetic poles face each other in the radial direction. As a result, the torque (second torque) generated between the magnet part 13 having 20 poles and the magnet part 23 has a maximum value of about 0.14 N × m and the magnet part 12 having 4 poles and the magnet. The torque characteristic between the portions 22 is configured to have a sinusoidal waveform torque characteristic that is five times the frequency (one cycle is approximately 36 degrees).

  Magnets 12a, 12b, 13a, 13b, 22a, 22b, 23a, and 23b are both composed of a rare earth element R of about 12 atomic% to about 17 atomic% and B of about 5 atomic% to about 8 atomic%. It is composed of an R-T-B system magnet containing (boron) and a transition element T mainly composed of the balance Fe. In addition, the R-T-B system magnet mainly includes at least one light rare earth element RL of Nd and Pr as the rare earth element R. Moreover, when the heavy rare earth element RH is included as the rare earth element R, it is preferable that at least one of the heavy rare earth elements RH of Dy and Tb is included.

  Next, with reference to FIGS. 2-6, the synthetic | combination torque which the magnetic coupling apparatus 100 by 1st Embodiment of this invention has is demonstrated.

  2 and 3, the motor side portion 1 is rotated with respect to the load side rotating body 20 by rotating the motor side portion 1 by a drive portion (not shown) as shown in FIGS. 4 and 5 from the stopped state of the magnetic coupling device 100 shown in FIGS. When the relative angle (twisting angle α) of the rotating body 10 is changed, the relative angle between the facing magnet 12a (12b) and the magnet 22a (22b) (the magnet 12a (12b) and the magnet 22a (22b) is positive). The angle deviating from the state with respect to it changes. As a result, torque (first torque) is generated between the magnet part 12 and the magnet part 22 which are four poles. In addition, the relative angle between the magnet 13a (13b) and the magnet 23a (23b) facing each other (the angle at which the magnet 13a (13b) and the magnet 23a (23b) are directly opposed) changes. Torque (second torque) is generated between the magnet part 13 and the magnet part 23 which are 20 poles. As a result, a combined torque obtained by combining the first torque and the second torque is generated in the load-side rotating body 20.

  At this time, as shown in FIG. 6, with respect to the relative angle (torsion angle α) of the motor-side rotating body 10 with respect to the load-side rotating body 20, torque generated between the magnet part 12 and the magnet part 22 having four poles ( The first torque) is generated between the magnet portion 13 and the magnet portion 23 having 20 poles, and has a sinusoidal torque characteristic having a maximum value of about 0.8 N × m and one cycle of about 180 degrees. The torque (second torque) has a sinusoidal torque characteristic having a maximum value of about 0.14 N × m and a period of about 36 degrees. The characteristic of the combined torque generated in the load side rotator 20 is formed by combining the characteristic of the first torque and the characteristic of the second torque.

  Thus, in the load-side rotating body 20, the combined torque does not substantially change in the vicinity of the rated torque (about 0.46 N × m) when the twist angle α is in the range of about 10 degrees to about 25 degrees, while the twist angle α In the range from about 0 degrees to about 10 degrees and in the range from about 25 degrees to about 45 degrees, the combined torque changes more than the combined torque in the range from about 10 degrees to about 25 degrees Is obtained. At this time, the amount of change in the combined torque in the load-side rotating body 20 in the range from about 10 degrees to about 25 degrees is the amount of change in the first torque and the second amount in the range from about 10 degrees to about 25 degrees. Less than the amount of torque change.

  As described above, the number of magnetic poles of the magnet parts 12 and 22 (4 poles) and the number of magnetic poles of the magnet parts 13 and 23 (20 poles) are appropriately selected, and the area where the magnet parts 12 and 22 face each other. And the desired torque characteristic shown in FIG. 6 can be obtained by adjusting the ratio (about 40: 7) of the area where the magnet part 13 and the magnet part 23 face each other.

  In the first embodiment, as described above, the motor-side rotating body 10 is configured such that the number of magnetic poles (4 poles) of the magnet unit 12 and the number of magnetic poles (20 poles) of the magnet unit 13 are different, and the load side The rotating body 20 is configured such that the number of magnetic poles (4 poles) of the magnet unit 22 corresponding to the magnet unit 12 is different from the number of magnetic poles (20 poles) of the magnet unit 23 corresponding to the magnet unit 13. 12 and a magnet portion 22 having a number of magnetic poles corresponding to the magnet portion 12, a maximum value by magnetic coupling is about 0.8 N × m, and one cycle is about 180 degrees sinusoidal torque characteristics, The maximum value due to magnetic coupling between the magnet part 13 having a different number of magnetic poles from the part 12 and the magnet part 23 having the number of magnetic poles corresponding to the magnet part 13 is about 0.14 N × m, and one period is about Combining 36 degree sinusoidal torque characteristics, A torque characteristic different from that of a string wave can be obtained. Thereby, by arbitrarily selecting the number of magnetic poles of the magnet parts 12 and 22 and the number of magnetic poles of the magnet parts 13 and 23, the load side rotation with respect to the change in relative angle with the motor side rotating body 10 can be easily performed. The combined torque of the body 20 can be adjusted to a predetermined torque characteristic different from the sinusoidal shape.

  Moreover, in 1st Embodiment, while adjusting the combination of the magnetic pole number (4 poles) of the magnet parts 12 and 22 and the magnetic pole number (20 poles) of the magnet parts 13 and 23 as mentioned above, the magnet part 12 is adjusted. If the ratio (about 40: 7) of the area where the magnet part 22 faces and the area where the magnet part 13 faces the magnet part 23 is adjusted (about 40: 7), the number of magnetic poles of the magnet parts 12 and 22 (four poles) The number of magnetic poles (20 poles) of the magnet portions 13 and 23 is appropriately selected, and the ratio of the facing area between the magnet portion 12 and the magnet portion 22 and the facing area between the magnet portion 13 and the magnet portion 23 is determined. By adjusting, a desired combined torque can be easily generated in the load side rotating body 20.

  In the first embodiment, as described above, the number of magnetic poles of the magnet unit 13 (20 poles) is five times the number of magnetic poles of the magnet unit 12 (4 poles), and the number of magnetic poles of the magnet unit 23 (20 poles). ) Is five times the number of magnetic poles (four poles) of the magnet portion 22, the torque characteristic (waveform) of the load-side rotating body 20 with respect to a change in the angle relative to the motor-side rotating body 10 is Based on the torque characteristics obtained based on the magnet section 12 and the magnet section 22 having a small number of magnetic poles, the torque characteristics obtained based on the magnet section 13 and the magnet section 23 having a large number of magnetic poles are used to obtain a predetermined torque characteristic. It can be made easier to adjust. As a result, the combined torque of the load-side rotator 20 can be adjusted to a predetermined torque characteristic more easily.

  In the first embodiment, as described above, the combined torque of the load-side rotating body 20 is in the vicinity of the rated torque (about 0.46 N × m) when the twist angle α is in the range of about 10 degrees to about 25 degrees. Therefore, if the combination of the number of magnetic poles of the magnet parts 12 and 22 and the number of magnetic poles of the magnet parts 13 and 23 is selected, fluctuations in the combined torque near the rated torque can be further suppressed. Even when the relative angle of the load-side rotator 20 to the motor-side rotator 10 changes, it is possible to effectively suppress fluctuations in the rotation speed of the load-side rotator 20 near the rated torque. Torque characteristics can be obtained.

  Moreover, in 1st Embodiment, as mentioned above, the area of the area | region where the 4-pole magnet part 12 and the magnet part 22 oppose is compared with the area of the area | region where the 20-pole magnet part 13 and the magnet part 23 oppose. Is larger, the torque characteristics (waveform) of the load-side rotating body 20 with respect to a change in the angle relative to the motor-side rotating body 10, and the magnet sections 13 and 23 with reference to the torque characteristics at the magnet sections 12 and 22. It can be adjusted according to the torque characteristics. As a result, the combined torque of the load-side rotator 20 can be adjusted to a predetermined torque characteristic more easily.

  In the first embodiment, as described above, if the number of magnetic poles of the magnet parts 12 and 22 is four and the number of magnetic poles of the magnet parts 13 and 23 is 20 poles, the four-pole magnetic poles are configured. The combined torque of the load-side rotating body 20 with respect to a change in the relative angle with the motor-side rotating body 10 is determined from a predetermined number of magnet parts 12 and 22 and the magnet parts 13 and 23 having 20 magnetic pole numbers. The torque characteristics can be adjusted.

  In the first embodiment, as described above, the load-side rotator 20 is disposed at a predetermined interval in the radial direction (direction orthogonal to the rotation axis A) with respect to the motor-side rotator 10, If the magnet parts 12 and 13 and the magnet parts 22 and 23 are both arranged in the X direction along the rotation axis A, the motor-side rotating body 10 and the load-side rotating body 20 face each other in the radial direction. In the magnetic coupling device 100, the combined torque around the rotation axis A of the load side rotator 20 can be easily adjusted to a predetermined torque characteristic.

  In the first embodiment, as described above, in the magnet section 12 having four magnetic poles, the two magnets 12a previously magnetized to the N pole and the two magnets 12b magnetized to the S pole in advance. In the magnet part 13 having 20 magnetic poles, ten magnets 13a preliminarily magnetized to N poles and ten magnets 13b preliminarily magnetized to S poles are used, and a magnet having four magnetic poles The part 22 uses two magnets 22a preliminarily magnetized to the S pole and two magnets 22b magnetized to the N pole in advance, and the magnet part 23 having 20 magnetic poles is magnetized to the S pole in advance. 10 magnets 23a and 10 magnets 23b preliminarily magnetized with N poles are used. If comprised in this way, when manufacturing the motor side rotary body 10 and the load side rotary body 20, since the magnet previously magnetized by one magnetic pole can be used, the motor side rotary body 10 and load side rotation are possible. Compared to the case where the magnet is magnetized after the body 20 is assembled, the magnet can be surely magnetized.

(First modification of the first embodiment)
Next, a first modification of the first embodiment of the present invention will be described with reference to FIG. 1, FIG. 2, FIG. 7, and FIG. In the magnetic coupling device 200 according to the first modification of the first embodiment, a case will be described in which the number of magnetic poles of the magnet portions 213 and 223 is 16 unlike the first embodiment.

  In the magnetic coupling device 200 according to the first modification of the first embodiment of the present invention, as shown in FIG. 1, the X1 side of the inner surface 11 a in the recess 11 of the motor-side rotating body 10 is along the rotation axis A. The magnet portion 213 is fixed. Further, a magnet portion 223 is fixed along the rotation axis A on the X1 side of the outer side surface 21 of the load side rotating body 20. Moreover, the magnet part 213 and the magnet part 223 are comprised so that it may carry out a magnetic coupling in the state which mutually opposed in the radial direction (direction orthogonal to the rotating shaft line A). The magnet part 213 is an example of the “second magnet part” in the present invention, and the magnet part 223 is an example of the “fourth magnet part” in the present invention.

  Here, in the first modification of the first embodiment, as shown in FIG. 7, in the magnet portion 213, eight magnets 213a preliminarily magnetized to the N pole and eight magnets preliminarily magnetized to the S pole. Magnets 213b are alternately arranged circumferentially at equiangular intervals (about 23 degrees). Further, in the magnet part 223, eight magnets 223a preliminarily magnetized to S poles and eight magnets 223b preliminarily magnetized to N poles are alternately arranged at equal angular intervals (about 23 degrees). Has been placed. That is, the number of magnetic poles of the magnet portions 213 and 223 is configured to be 16 poles.

  As shown in FIGS. 1 and 7, the magnets 213 a and 213 b both have the same arcuate cross-sectional shape in the YZ plane (see FIG. 7) and are along the rotation axis A. Are arranged to extend in the X direction (see FIG. 1). The magnets 223a and 223b both have the same arcuate cross-sectional shape in the YZ plane (see FIG. 7) and extend in the X direction (see FIG. 1) along the rotation axis A. Are arranged as follows.

  Further, as shown in FIG. 7, in the magnets 213a and 223b, the N pole is located on the magnet portions 223 and 213 side on the straight line extending in the radial direction (direction orthogonal to the rotation axis A), and the S pole Is arranged on the opposite side to the magnet parts 223 and 213. In addition, the magnets 213b and 223a are arranged so that the south pole is located on the magnet parts 223 and 213 side and the north pole is located on the opposite side of the magnet parts 223 and 213 in the radial direction.

  In the stop state, the center position 213c of the cross-sectional shape of the magnet 213a and the center position 223c of the cross-sectional shape of the magnet 223a are arranged on a straight line extending in the radial direction (direction orthogonal to the rotation axis A). At the same time, the N pole side of the magnet 213a and the S pole side of the magnet 223a are arranged to face each other. In the stopped state, the center position 213d of the cross-sectional shape of the magnet 213b and the center position 223d of the cross-sectional shape of the magnet 223b are arranged on a straight line extending in the radial direction, and the S pole side of the magnet 213b The N pole side of the magnet 223b is arranged to face each other. That is, in the stopped state, the magnet part 213 and the magnet part 223 are configured such that different magnetic poles face each other in the radial direction. Thereby, the torque (second torque) generated between the magnet part 213 having 16 poles and the magnet part 223 has a maximum value of about 0.14 N × m, and the magnet part 12 having 4 poles and the magnet The torque characteristic between the portions 22 is configured to have a sinusoidal torque characteristic that is four times the frequency (one cycle is about 45 degrees).

  Magnets 213a, 213b, 223a, and 223b are both R-T-B magnets. The remaining configuration of the first modification example of the first embodiment is similar to that of the first embodiment.

  Next, with reference to FIG. 2, FIG. 7, and FIG. 8, the combined torque of the magnetic coupling device 200 according to the first modification of the first embodiment of the present invention will be described.

  When the relative angle (torsion angle α) of the motor-side rotating body 10 with respect to the load-side rotating body 20 is changed from the stopped state of the magnetic coupling device 200 shown in FIGS. 2 and 7, as shown in FIG. Regarding the relative angle (twisting angle α) of the motor-side rotating body 10 with respect to the rotating body 20, the torque (first torque) generated between the magnet part 12 and the magnet part 22 having four poles has a maximum value of about 0. The torque (second torque) generated between the magnet part 213 and the magnet part 223 having 16 poles has a maximum value of about 8N × m and has a sinusoidal torque characteristic with one cycle of about 180 degrees. It has a sinusoidal torque characteristic of 0.14 N × m and one cycle of about 45 degrees.

  Thereby, in the load side rotating body 20, the combined torque does not substantially change in the vicinity of about 0.56 N × m in the range from about 15 degrees to about 30 degrees, while the twist angle α is about 0 degrees. In the range from about 15 degrees to about 15 degrees and in the range from about 30 degrees to about 55 degrees, a torque characteristic in which the combined torque changes more greatly than the combined torque in the range from about 15 degrees to about 30 degrees is obtained. Note that the amount of change in the combined torque in the load-side rotating body 20 in the range from about 15 degrees to about 30 degrees is the amount of change in the first torque and the second torque in the range from about 15 degrees to about 30 degrees. Is smaller than the amount of change.

  That is, in the combined torque of the load-side rotator 20 according to the first modification of the first embodiment, the range of the twist angle α where the combined torque does not change substantially does not change the combined torque in the first embodiment shown in FIG. The range of the twist angle α can be shifted by about 5 degrees, and the value of the combined torque that does not substantially change is changed from the value of the combined torque that does not change (about 0.46 N × m) in the first embodiment to about 0.56 N ×. It can be adjusted so as to increase to m.

  The effect of the first modification of the first embodiment is the same as that of the first embodiment.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG. 1, FIG. 2, FIG. 9, and FIG. In the magnetic coupling device 300 according to the second embodiment, unlike the first embodiment, in the stopped state, the N pole side of the magnet 13a and the N pole side of the magnet 23b are arranged so as to face each other. The case where the south pole side of the magnet 13b and the south pole side of the magnet 23a are arranged so as to face each other will be described.

  In the magnetic coupling device 300 according to the second embodiment of the present invention, as shown in FIG. 1, the length L1 along the X direction of the magnet parts 12 and 22 and the length along the X direction of the magnet parts 13 and 23. The ratio with L2 is configured to be about 20: 3. Further, the torque (first torque) generated between the magnet unit 12 and the magnet unit 22 is configured to be about 1 N × m at the maximum. On the other hand, the torque (second torque) generated between the magnet portion 13 and the magnet portion 23 is configured to be about 0.15 N × m at the maximum.

  In addition, as shown in FIG. 9, in the stopped state, the center position 13c of the sectional shape of the magnet 13a and the center position 23d of the sectional shape of the magnet 23b extend in the radial direction (the direction orthogonal to the rotation axis A). While being arranged on a straight line, the N pole side of the magnet 13a and the N pole side of the magnet 23b are arranged to face each other. In the stop state, the cross-sectional center position 13d of the magnet 13b and the cross-section center position 23c of the magnet 23a are arranged on a straight line extending in the radial direction, and the S pole side of the magnet 13b It arrange | positions so that the S pole side of the magnet 23a may mutually face. That is, in the stop state, the magnet portion 13 and the magnet portion 23 are configured such that the same magnetic pole faces in the radial direction. As a result, the torque (second torque) generated between the magnet part 13 and the magnet part 23 having 20 poles has a maximum value of about 0.15 N × m, one cycle is about 36 degrees, and a phase. Is configured to have a sinusoidal torque characteristic that is shifted by approximately 18 degrees (with an opposite phase). The remaining configuration of the second embodiment is the same as that of the first embodiment.

  Next, with reference to FIG. 2, FIG. 9, and FIG. 10, the combined torque of the magnetic coupling device 300 according to the second embodiment of the present invention will be described.

  When the relative angle (torsion angle α) of the motor-side rotating body 10 with respect to the load-side rotating body 20 is changed from the stopped state of the magnetic coupling device 300 shown in FIGS. 2 and 9, as shown in FIG. Regarding the relative angle (torsion angle α) of the motor-side rotating body 10 with respect to the rotating body 20, the maximum value of the torque (first torque) generated between the magnet part 12 and the magnet part 22 having four poles is about 1N ×. m, having a sinusoidal torque characteristic of one cycle of about 180 degrees, and the maximum torque (second torque) generated between the magnet part 13 and the magnet part 23 having 20 poles is about 0.00. 15N × m, one cycle is about 36 degrees, and has a sinusoidal torque characteristic whose phase is shifted by about 18 degrees (in reverse phase).

  As a result, in the load-side rotating body 20, the amount of change in the combined torque in the load-side rotating body 20 is greater than the amount of change in the first torque and the amount of change in the second torque in the range of the twist angle α around 20 degrees. As a result, a torque characteristic of the combined torque can be obtained.

  In the second embodiment, as described above, the motor-side rotating body 10 is configured such that the number of magnetic poles (4 poles) of the magnet unit 12 and the number of magnetic poles (20 poles) of the magnet unit 13 are different, and the load side The rotating body 20 is configured such that the number of magnetic poles (4 poles) of the magnet unit 22 corresponding to the magnet unit 12 is different from the number of magnetic poles (20 poles) of the magnet unit 23 corresponding to the magnet unit 13. 12 and the magnet portion 22 have a maximum value of about 0.8 N × m and a cycle of about 180 degrees in a sinusoidal torque characteristic, and the magnetism between the magnet portion 13 and the magnet portion 23. The maximum value by coupling is about 0.15 N × m, one period is about 36 degrees, and a sinusoidal torque characteristic that is out of phase by about 18 degrees (opposite phase) is synthesized. Different torque characteristics can be obtained. As a result, the combined torque of the load-side rotator 20 with respect to a change in the angle relative to the motor-side rotator 10 can be easily adjusted to a predetermined torque characteristic different from the sine wave shape.

  Further, in the second embodiment, as described above, the amount of change in the combined torque at the load-side rotating body 20 within the range of the twist angle α near about 20 degrees is the amount of change in the first torque and the amount of the second torque. If the combination of the number of magnetic poles of the magnet parts 12 and 22 (4 poles) and the number of magnetic poles of the magnet parts 13 and 23 (20 poles) is selected so as to be larger than the amount of change, Since the fluctuation of the combined torque of the load-side rotator 20 with respect to the relative angle change can be increased, it is sufficient to cope with the load fluctuation in the load-side rotator 20 even if the relative angle change is small. Can generate a combined torque. Thereby, it is possible to make it difficult to change the relative angle between the motor-side rotating body 10 and the load-side rotating body 20. The remaining effects of the second embodiment are similar to those of the first embodiment.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIG. 2 and FIGS. In the magnetic coupling device 400 according to the third embodiment, in addition to the first embodiment, a case will be described in which the magnet unit 13 is configured to be rotatable in a state shifted from the magnet unit 23.

  In the magnetic coupling device 400 according to the third embodiment of the present invention, as shown in FIGS. 11 and 12, a groove portion 410a is formed in a circumferential shape on the X1 side of the inner surface 11a of the concave portion 11 in the motor-side rotating body 410. Has been. The groove portion 410 a is formed so as to be positioned on the outer peripheral side of the magnet portion 13. Further, the motor-side rotating body 410 is provided with a screw hole 410b. The screw hole 410b is configured such that a screw 403 for fixing a rotating unit 414, which will be described later, to the motor side rotating body 410 is screwed.

  Further, an annular rotating portion 414 centering on the rotation axis A is disposed in the groove portion 410a of the inner surface 11a. The magnet portion 13 is fixed to the inner peripheral surface of the rotating portion 414. The rotating unit 414 is configured to be rotatable around the rotation axis A with respect to the motor-side rotating body 410 at an angle β (see FIG. 13).

  The rotating unit 414 is configured to be fixed to the motor-side rotator 410 with a screw 403 in a state where the rotator 414 is rotated by an angle β around the rotation axis A with respect to the motor-side rotator 410. Specifically, the rotating portion 414 can be fixed to the motor-side rotating body 410 by the screw tip of the screw 403 screwed into the screw hole 410b pressing the outer surface of the rotating portion 414. Thereby, it is possible to fix the rotating part 414 to the motor side rotating body 410 at an arbitrary angle β.

  Further, in a predetermined stop state (a state where the angle β is about 0 degree), the magnet portion 13 and the magnet portion 23 are configured such that different magnetic poles face each other in the radial direction. As a result, the torque (second torque) generated between the magnet part 13 and the magnet part 23 having four poles is a sinusoidal torque having a maximum value of about 0.14 N × m and a period of about 36 degrees. It is configured to be characteristic.

  Further, as shown in FIG. 13, in a stopped state and in a state where the rotating unit 414 rotates clockwise by about 10 degrees with respect to the motor-side rotating body 410 (state where the angle β is about −10 degrees), The cross-sectional center position 13c of the magnet 13a and the cross-sectional center position 13d of the magnet 13b are respectively more clockwise than the cross-sectional center position 23c of the magnet 23a and the cross-sectional center position 23d of the magnet 23b. It is configured to be in a state shifted by about 10 degrees. As a result, the torque (second torque) generated between the magnet part 13 and the magnet part 23 having 20 poles has a maximum value of about 0.14 N × m, one period is about 36 degrees, and a phase. Is configured to have a sinusoidal torque characteristic delayed by about 10 degrees.

  In a stopped state and when the rotating unit 414 rotates counterclockwise by about 10 degrees with respect to the motor-side rotating body 410 (when the angle β is about +10 degrees), the center position 13c of the magnet 13a and The center position 13d of the magnet 13b is configured to be shifted by about 10 degrees counterclockwise from the center position 23c of the magnet 23a and the center position 23d of the magnet 23b. As a result, the torque (second torque) generated between the magnet part 13 and the magnet part 23 having 20 poles has a maximum value of about 0.14 N × m, one period is about 36 degrees, and a phase. Is configured to have a sinusoidal torque characteristic advanced by about 10 degrees. Other configurations of the third embodiment are the same as those of the first embodiment.

  Next, with reference to FIGS. 2 and 14 to 16, the combined torque of the magnetic coupling device 400 according to the third embodiment of the present invention will be described.

  From the state in which the rotating unit 414 shown in FIG. 2 and FIG. 14 rotates clockwise by about 10 degrees with respect to the motor side rotating body 410 (the state where the angle β is about −10 degrees), the motor side with respect to the load side rotating body 20 When the relative angle (twisting angle α) of the rotating body 410 is changed, as shown in FIG. 15, the magnet unit having four poles with respect to the relative angle (twisting angle α) of the motor-side rotating body 410 with respect to the load-side rotating body 20. The torque (first torque) generated between the magnet 12 and the magnet portion 22 has a maximum value of about 0.8 N × m, has a sinusoidal torque characteristic with one cycle of about 180 degrees, and has 20 poles. The torque (second torque) generated between the magnet portion 13 and the magnet portion 23 has a maximum value of about 0.14 N × m, one cycle is about 36 degrees, and the phase is a sine delayed by about 10 degrees. Has wavy torque characteristics.

  As a result, in the load-side rotating body 20 in a state of being shifted about 10 degrees clockwise, the combined torque is substantially changed in the vicinity of about 0.55 N × m in the range of the twist angle α from about 15 degrees to about 30 degrees. On the other hand, when the twist angle α is in the range from about 0 degrees to about 15 degrees and in the range from about 30 degrees to about 50 degrees, the combined torque changes more than the range from about 15 degrees to about 30 degrees. Torque characteristics can be obtained. At this time, the amount of change in the combined torque in the load side rotor 20 in the range from about 15 degrees to about 30 degrees is the amount of change in the first torque and the second amount in the range from about 15 degrees to about 30 degrees. Less than the amount of torque change.

  That is, the combined torque in the first embodiment shown in FIG. 6 does not substantially change in the range of the twist angle α in which the combined torque does not substantially change in the combined torque of the load-side rotator 20 in a state shifted by about 10 degrees clockwise. The range of the twist angle α can be shifted by about 5 degrees, and the value of the combined torque that does not substantially change is changed from the value of the combined torque that does not change (about 0.46 N × m) in the first embodiment to about 0.55 N ×. It can be adjusted so as to increase to m.

  In addition, from the state in which the rotating unit 414 rotates counterclockwise by about 10 degrees with respect to the motor-side rotating body 410 (the state where the angle β is about +10 degrees), the motor-side rotating body 410 is relative to the load-side rotating body 20. When the angle (twisting angle α) is changed, as shown in FIG. 16, with respect to the relative angle (twisting angle α) of the motor-side rotating body 10 with respect to the load-side rotating body 20, the magnet section 12 and the magnet section 22 that are four poles. The torque (first torque) generated between the magnet portion 13 has a maximum value of about 0.8 N × m, has a sinusoidal torque characteristic of one cycle of about 180 degrees, and has 20 magnets. Torque generated between the unit 23 (second torque) has a maximum value of about 0.14 N × m, a period of about 36 degrees, and a sinusoidal torque characteristic with a phase advanced by about 10 degrees. Have.

  As a result, in the load-side rotating body 20 in a state of being deviated approximately 10 degrees counterclockwise, the combined torque is approximately in the vicinity of approximately 0.33 N × m with the twist angle α ranging from approximately 5 degrees to approximately 20 degrees. On the other hand, when the twist angle α is in the range from about 0 degrees to about 5 degrees and in the range from about 20 degrees to about 40 degrees, the combined torque changes more than the range from about 5 degrees to about 20 degrees. Torque characteristics to be obtained. At this time, the amount of change in the combined torque in the load-side rotating body 20 in the range from about 5 degrees to about 20 degrees is the amount of change in the first torque and the second amount in the range from about 5 degrees to about 20 degrees. Less than the amount of torque change.

  That is, in the combined torque of the load-side rotating body 20 in a state of being shifted about 10 degrees counterclockwise, the range of the twist angle α where the combined torque does not substantially change is substantially changed in the combined torque in the first embodiment shown in FIG. It is possible to shift about −5 degrees from the range of the twist angle α that does not change, and the value of the combined torque that does not substantially change is about 0. 0 from the value of the combined torque that does not change (about 0.46 N × m) in the first embodiment. Adjustment can be made to be as small as 33 N × m.

  In the third embodiment, as described above, the motor-side rotating body 410 is configured such that the number of magnetic poles (4 poles) of the magnet unit 12 and the number of magnetic poles of the magnet unit 13 (20 poles) are different from each other. The rotating body 20 is configured such that the number of magnetic poles (4 poles) of the magnet unit 22 corresponding to the magnet unit 12 is different from the number of magnetic poles (20 poles) of the magnet unit 23 corresponding to the magnet unit 13. 12 and the magnet portion 22 have a maximum value of about 0.8 N × m and a cycle of about 180 degrees in a sinusoidal torque characteristic, and the magnetism between the magnet portion 13 and the magnet portion 23. Torque different from a sine wave shape, which is a combined maximum of about 0.14 N × m, a cycle of about 36 degrees, and a phase lag of about 10 degrees or advanced sinusoidal torque characteristics. Characteristics can be obtained. As a result, the combined torque of the load-side rotating body 20 with respect to a change in the relative angle with the motor-side rotating body 410 can be easily adjusted to a predetermined torque characteristic different from the sine wave shape.

  Further, in the third embodiment, as described above, the rotation is stopped and the rotating unit 414 is rotated clockwise (counterclockwise) by about 10 degrees with respect to the motor-side rotating body 410 (the angle β is In a state of about −10 degrees (about +10 degrees), the center position 13c of the magnet 13a and the center position 13d of the magnet 13b are about 10 degrees with respect to the center position 23c of the magnet 23a and the center position 23d of the magnet 23b, respectively. If configured to be shifted, the center position 13c of the magnet 13a and the center position 13d of the magnet 13b are shifted by about 10 degrees with respect to the center position 23c of the magnet 23a and the center position 23d of the magnet 23b, respectively. The torque characteristics due to the magnetic coupling between the magnet part 13 and the magnet part 23 are shifted between the center position 13c (13d) and the center position 23c (23d). It can be different torque characteristics and torque characteristics in the absence. Thereby, more various torque characteristics can be obtained. The remaining effects of the third embodiment are similar to those of the first embodiment.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described with reference to FIGS. 2, 6 and 17 to 20. In the magnetic coupling device 500 according to the fourth embodiment, a case where a yoke 515 is arranged on the outer peripheral surface of the motor side rotating body 510 in addition to the first embodiment will be described.

  In the magnetic coupling device 500 according to the fourth embodiment of the present invention, as shown in FIGS. 17 and 18, a groove portion 510 c is formed circumferentially on the X1 side of the outer peripheral surface 510 of the motor-side rotating body 510. . Further, an annular yoke 515 centered on the rotation axis A is disposed in the groove portion 510 c of the outer peripheral surface 510. The yoke 515 is configured to be rotatable around the rotation axis A with respect to the motor side rotating body 510.

  Here, in the fourth embodiment, as shown in FIG. 18, the same number (20) of convex portions 515 a and concave portions 515 b as the number of magnetic poles (20 poles) of the magnet portion 13 are provided on the outer peripheral surface of the yoke 515. It has been. The convex portions 515a and the concave portions 515b are alternately formed at equiangular intervals (about 9 degrees). In addition, the thickness of the yoke 515 in the radial direction (the direction orthogonal to the rotation axis A) at the position where the convex portion 515a is formed is larger than the thickness of the yoke 515 in the radial direction at the position where the concave portion 515b is formed. It is configured as follows.

  The yoke 515 is provided with a screw hole 515c into which the screw 503 is screwed. The yoke 515 is configured to be fixed to the motor-side rotating body 510 with a screw 503 in a state where the yoke 515 is rotated about the rotation axis A by an angle γ with respect to the motor-side rotating body 510. Specifically, the yoke 515 can be fixed to the motor-side rotating body 510 by the screw tip of the screw 503 screwed into the screw hole 515c pressing the outer surface of the motor-side rotating body 510. Thereby, it is possible to fix the yoke 515 to the motor-side rotating body 510 at an arbitrary angle γ.

  Further, as shown in FIG. 18, in a predetermined stop state (state where the angle γ is about 0 degree), the convex portion 515a of the yoke 515 is disposed at a corresponding position between the magnet 13a and the magnet 13b. The recess 515b is configured to be disposed at a position corresponding to the magnet 13a and the magnet 13b. Thereby, it is comprised so that the intensity | strength of the magnetic field comprised by the magnet 13a and the magnet 13b may become large by the convex part 515a arrange | positioned in the position corresponding between the magnet 13a and the magnet 13b. In this case, the torque (second torque) generated between the magnet part 13 having 20 poles and the magnet part 23 has a maximum value of about 0.14 N × m and one cycle as in the first embodiment. It is configured to have a sinusoidal torque characteristic of about 36 degrees.

  On the other hand, as shown in FIG. 19, in a stopped state and in a state where the yoke 515 rotates counterclockwise by about 9 degrees with respect to the motor-side rotating body 510 (a state where the angle γ is about +9 degrees), the yoke The convex portion 515a of 515 is arranged at a position corresponding to the magnet 13a and the magnet 13b, and the concave portion 515b is arranged at a corresponding position between the magnet 13a and the magnet 13b. Thereby, since the convex part 515a is not arrange | positioned between the magnet 13a and the magnet 13b, compared with the case where the convex part 515a of the yoke 515 is arrange | positioned in the corresponding position between the magnet 13a and the magnet 13b, the magnet 13a. The strength of the magnetic field formed by the magnet 13b is reduced. Thereby, it is comprised so that the intensity | strength of the magnetic field which acts on the magnet part 13 and the magnet part 23 may become small. In this case, the torque (second torque) generated between the magnet part 13 having 20 poles and the magnet part 23 is a sinusoidal torque having a maximum value of about 0.08 N × m and a period of about 36 degrees. It is configured to be characteristic.

  That is, by rotating the yoke 515 about the rotation axis A, the strength of the magnetic field acting on the magnet unit 13 and the magnet unit 23 can be adjusted. In addition, the other structure of 4th Embodiment is the same as that of 1st Embodiment.

  Next, with reference to FIG. 2, FIG. 6, FIG. 19, and FIG. 20, the combined torque of the magnetic coupling device 500 according to the fourth embodiment of the present invention will be described.

  From the state shown in FIG. 2 and FIG. 19 in which the yoke 515 is rotated counterclockwise by about 9 degrees with respect to the motor-side rotating body 510 (the state where the angle γ is about +9 degrees). When the relative angle (twisting angle α) of the motor-side rotating body 510 with respect to the rotating body 20 is changed, the relative angle (twisting angle α) of the motor-side rotating body 510 with respect to the load-side rotating body 20 is changed as shown in FIG. The torque (first torque) generated between the magnet part 12 and the magnet part 22 having four poles has a maximum value of about 0.8 N × m, and has a sinusoidal torque characteristic with one cycle of about 180 degrees. At the same time, the torque (second torque) generated between the magnet part 13 and the magnet part 23 having 20 poles has a maximum value of about 0.08 N × m and a sinusoidal torque characteristic with a period of about 36 degrees. Have

  Thereby, in the state where the concave portion 515b of the yoke 515 is disposed at the corresponding position between the magnet 13a and the magnet 13b, the convex portion 515a is disposed at the corresponding position between the magnet 13a and the magnet 13b ( The influence of the second torque is smaller than that in FIG. 6), so that the torque characteristic of the combined torque in the load side rotating body 20 becomes a torque characteristic close to the torque characteristic of the first torque. For this reason, as the combined torque of the load-side rotator 20, the twist angle α is from about 10 degrees to about 25 degrees compared to the case where the convex portions 515a are arranged at corresponding positions between the magnets 13a and 13b. The amount of change in the range increases.

  In the fourth embodiment, as described above, the motor-side rotator 510 is configured such that the number of magnetic poles (4 poles) of the magnet unit 12 and the number of magnetic poles of the magnet unit 13 (20 poles) are different, and the load side The rotating body 20 is configured such that the number of magnetic poles (4 poles) of the magnet unit 22 corresponding to the magnet unit 12 is different from the number of magnetic poles (20 poles) of the magnet unit 23 corresponding to the magnet unit 13. 12 and the magnet portion 22 have a maximum value of about 0.8 N × m and a cycle of about 180 degrees in a sinusoidal torque characteristic, and the magnetism between the magnet portion 13 and the magnet portion 23. A torque characteristic different from a sine wave shape obtained by synthesizing a sinusoidal torque characteristic having a maximum value of about 0.08 N × m by coupling and a period of about 36 degrees can be obtained. As a result, the combined torque of the load-side rotator 20 with respect to a change in the angle relative to the motor-side rotator 510 can be easily adjusted to a predetermined torque characteristic.

  Further, in the fourth embodiment, as described above, if the yoke 515 configured to be able to adjust the strength of the magnetic field acting on the magnet unit 13 and the magnet unit 23 is provided, the magnetic field is generated using the yoke 515. By adjusting the strength of the magnetic coupling, more various torque characteristics can be obtained in the magnetic coupling between the magnet portion 13 and the magnet portion 23. The remaining effects of the fourth embodiment are similar to those of the first embodiment.

(Fifth embodiment)
Next, a fifth embodiment of the present invention will be described with reference to FIGS. 2, 3, 6 and 21 to 23. In the magnetic coupling device 600 according to the fifth embodiment, unlike the first embodiment, a magnet unit 616 is further provided on the motor-side rotating body 10 and a magnet unit corresponding to the magnet unit 616 is provided on the load-side rotating body 20. A case where 624 is provided will be described.

  In the magnetic coupling device 600 according to the fifth embodiment of the present invention, as shown in FIG. 21, the magnet portions 12 and 13 are provided on the X2 side and the X1 side of the inner surface 11a in the concave portion 11 of the motor side rotating body 10, respectively. Are fixed so as to be aligned in the X direction along the rotation axis A, and the magnet portion 616 is fixed along the rotation axis A between the magnet portion 12 and the magnet portion 13. Magnet portions 22 and 23 are fixed on the X2 side and X1 side of the outer side surface 21 of the load-side rotating body 20 so as to be aligned in the X direction along the rotation axis A, respectively. A magnet unit 624 is fixed between the magnet unit 23 and the rotation axis A. Moreover, the magnet part 616 and the magnet part 624 are arrange | positioned in the same position of a X direction so that it may oppose. Thereby, the magnet part 616 and the magnet part 624 are comprised so that a magnetic coupling may be carried out in the state which mutually opposed in the radial direction (direction orthogonal to the rotating shaft line A).

  Further, the length L1 along the X direction of the magnet parts 12 and 22, the length L2 along the X direction of the magnet parts 13 and 23, and the length L3 along the X direction of the magnet parts 616 and 624 The ratio is configured to be approximately 40: 2: 7. That is, the area where the magnet part 12 and the magnet part 22 face each other is larger than the area where the magnet part 13 and the magnet part 23 face each other and the area where the magnet part 616 and the magnet part 624 face each other. Moreover, the area where the magnet part 13 and the magnet part 23 oppose is larger than the area of the area | region where the magnet part 616 and the magnet part 624 oppose. Note that the torque (third torque) generated between the magnet unit 616 and the magnet unit 624 is configured to be about 0.04 N × m at the maximum.

  Here, in the fifth embodiment, as shown in FIG. 22, the magnet unit 616 includes six magnets 616a preliminarily magnetized to the N pole and six magnets 616b magnetized to the S pole in advance. It is alternately arranged in a circumferential manner at an angle (about 30 degrees) interval. In the magnet section 624, six magnets 624a previously magnetized to the S pole and six magnets 624b magnetized to the N pole in advance are alternately arranged at equal angular intervals (about 30 degrees). Has been placed. That is, the number of magnetic poles of the magnet parts 616 and 624 is configured to be 12 poles. The magnet unit 616 is an example of the “fifth magnet unit” in the present invention, and the magnet unit 624 is an example of the “sixth magnet unit” in the present invention.

  Further, as shown in FIGS. 21 and 22, both the magnets 616a and 616b have the same arcuate cross-sectional shape in the YZ plane (see FIG. 22) and are along the rotation axis A. Are arranged so as to extend in the X direction (see FIG. 21). Magnets 624a and 624b both have the same arcuate cross-sectional shape in the YZ plane (see FIG. 22) and extend in the X direction (see FIG. 21) along rotation axis A. Are arranged as follows.

  Further, as shown in FIG. 22, in the magnets 616a and 624b, the N pole is located on the magnet parts 624 and 616 side in the radial direction (direction orthogonal to the rotation axis A), and the S pole is the magnet part 624. And it arrange | positions so that it may be located on the opposite side to 616. Magnets 616b and 624a are arranged so that the south pole is located on the magnet parts 624 and 616 side and the north pole is located on the opposite side of magnet parts 624 and 616 in the radial direction.

  In the stopped state, the center position 616c of the cross-sectional shape of the magnet 616a and the center position 624d of the cross-sectional shape of the magnet 624b are arranged on a straight line extending in the radial direction (direction orthogonal to the rotation axis A). In addition, the N pole side of the magnet 616a and the N pole side of the magnet 624b are arranged to face each other. In the stop state, the center position 616d of the cross-sectional shape of the magnet 616b and the center position 624c of the cross-sectional shape of the magnet 624a are arranged on a straight line extending in the radial direction, and the S pole side of the magnet 616b The S pole side of the magnet 624a is arranged to face each other. That is, in the stopped state, the magnet portion 616 and the magnet portion 624 are configured such that the same magnetic pole faces in the radial direction. As a result, the torque (third torque) generated between the magnet portion 616 having 12 poles and the magnet portion 624 has a maximum value of about 0.04 N × m, and the magnet portion 12 and magnet having 4 poles. The frequency is three times the frequency of the torque characteristic between the parts 22 (one cycle is about 60 degrees), and the phase is shifted by about 30 degrees (opposite phase) to form a sinusoidal torque characteristic. Has been.

  Magnets 616a, 616b, 624a and 624b are all R-T-B magnets. The remaining configuration of the fifth embodiment is similar to that of the first embodiment.

  Next, with reference to FIG. 2, FIG. 3, FIG. 6, FIG. 22, and FIG. 23, the combined torque of the magnetic coupling device 600 according to the fifth embodiment of the present invention will be described.

  When the relative angle (torsion angle α) of the motor-side rotating body 10 with respect to the load-side rotating body 20 is changed from the stopped state of the magnetic coupling device 600 shown in FIGS. 2, 3, and 22, as shown in FIG. 23. Regarding the relative angle (torsion angle α) of the motor-side rotating body 10 with respect to the load-side rotating body 20, the torque (first torque) generated between the magnet part 12 and the magnet part 22 having four poles has a maximum value. The torque (second torque) generated between the magnet part 13 and the magnet part 23 having a sinusoidal torque characteristic of about 0.8 N × m and one cycle of about 180 degrees and having 20 poles is the maximum. The value is about 0.14 N × m, and it has a sinusoidal torque characteristic with a period of about 36 degrees, and the torque (third torque) generated between the magnet part 616 and the magnet part 624 having 12 poles is The maximum value is about 0.04 N × m, and one period is about 6 It has 0 degree and has a sinusoidal torque characteristic whose phase is shifted by about 30 degrees (with an opposite phase).

  As a result, in the load-side rotating body 20, the torsion angle α is about 0 degree while the combined torque does not substantially change in the vicinity of about 0.46 N × m in the range from about 10 degrees to about 25 degrees. In the range from about 10 degrees to about 10 degrees and in the range from about 25 degrees to about 45 degrees, a torque characteristic in which the combined torque changes more greatly than the combined torque in the range from about 10 degrees to about 25 degrees is obtained. At this time, the amount of change in the combined torque in the load-side rotating body 20 in the range from about 10 degrees to about 25 degrees is the amount of change in the first torque and the second amount in the range from about 10 degrees to about 25 degrees. Less than the amount of torque change.

  Further, in the combined torque of the load-side rotating body 20 in the fifth embodiment, the twist angle α is about 0 degree to about 10 degrees as compared with the combined torque of the load-side rotating body 20 in the first embodiment shown in FIG. In the range from about 25 degrees to about 45 degrees, torque characteristics that vary more greatly can be obtained.

  In the fifth embodiment, as described above, in the motor-side rotating body 10, the number of magnetic poles of the magnet unit 12 (4 poles), the number of magnetic poles of the magnet unit 13 (20 poles), and the number of magnetic poles of the magnet 616 (12 poles) In the load side rotating body 20, the number of magnetic poles of the magnet part 22 corresponding to the magnet part 12 (4 poles) and the number of magnetic poles of the magnet part 23 corresponding to the magnet part 13 (20 poles) By configuring so that the number of magnetic poles (12 poles) of the magnet unit 624 corresponding to the magnet unit 616 is different, the maximum value due to magnetic coupling between the magnet unit 12 and the magnet unit 22 is about 0.8 N ×. m, the maximum value by the magnetic coupling between the magnet part 13 and the magnet part 23 is about 0.14 N × m, and one period is about 36 degrees. Between the sinusoidal torque characteristics and the magnet portion 616 and the magnet portion 624; A maximum value by magnetic coupling is about 0.04 N × m, and one cycle is about 60 degrees, and a sinusoidal torque characteristic in which a phase is shifted by about 30 degrees (with an antiphase) is synthesized. Can obtain different torque characteristics. As a result, the combined torque of the load-side rotator 20 with respect to a change in the angle relative to the motor-side rotator 10 can be adjusted to a predetermined torque characteristic that is different from a sinusoidal shape. The remaining effects of the fifth embodiment are similar to those of the first embodiment.

(First Modification of Fifth Embodiment)
Next, a first modification of the fifth embodiment of the present invention will be described with reference to FIGS. 2, 3, 21, 22, and 24. FIG. In the magnetic coupling device 700 according to the first modification of the fifth embodiment, the size of the opposing areas in the respective magnet portions in the fifth embodiment is changed, and the magnet portion 616 and the magnet portion 624 are changed. A case where the phase of the torque (third torque) generated between them is the same as the phase of the torque (first torque) generated between the magnet unit 12 and the magnet unit 22 will be described.

  In the magnetic coupling device 700 according to the first modification of the fifth embodiment of the present invention, as shown in FIG. 21, the length L1 along the X direction of the magnet parts 12 and 22 and the X of the magnet parts 13 and 23 are obtained. The ratio between the length L2 along the direction and the length L3 along the X direction of the magnet portions 616 and 624 is configured to be about 125: 15: 36. That is, the area where the magnet part 12 and the magnet part 22 face each other is larger than the area where the magnet part 13 and the magnet part 23 face each other and the area where the magnet part 616 and the magnet part 624 face each other. Moreover, the area of the area | region where the magnet part 616 and the magnet part 624 oppose is larger than the area where the magnet part 13 and the magnet part 23 oppose.

  Further, the torque (first torque) generated between the magnet unit 12 and the magnet unit 22 is configured to be about 1.25 N × m at the maximum. Further, the torque (second torque) generated between the magnet portion 13 and the magnet portion 23 is configured to be about 0.15 N × m at the maximum. The torque (third torque) generated between the magnet unit 616 and the magnet unit 624 is configured to be about 0.36 N × m at the maximum. Unlike the fifth embodiment, in the first modification of the fifth embodiment, the magnet unit 616 and the magnet unit 624 are configured such that different magnetic poles face each other in the radial direction. As a result, the torque (third torque) generated between the magnet portion 616 having 12 poles and the magnet portion 624 has a maximum value of about 0.36 N × m and a sinusoidal torque having a cycle of about 60 degrees. It is configured to be characteristic.

  In the stopped state, the torque (first torque) generated between the magnet part 12 and the magnet part 22 having four poles has a maximum value of about 1.25 N × m, and one cycle is about 180 degrees. It is comprised so that it may become a wavy torque characteristic. In the stopped state, the torque (second torque) generated between the magnet part 13 and the magnet part 23 having 20 poles is a maximum value of about 0.15 N × m, and one cycle is a sine of about 36 degrees. It is comprised so that it may become a wavy torque characteristic. In the stopped state, the torque (third torque) generated between the magnet part 616 having 12 poles and the magnet part 624 has a maximum value of about 0.36 N × m and a cycle of about 60 degrees. It is comprised so that it may become a wavy torque characteristic. In addition, the other structure of the 1st modification of 5th Embodiment is the same as that of 5th Embodiment.

  Next, with reference to FIG. 2, FIG. 3, FIG. 22, and FIG. 24, the combined torque of the magnetic coupling device 700 according to the first modification of the fifth embodiment of the present invention will be described.

  When the relative angle (twisting angle α) of the motor-side rotating body 10 with respect to the load-side rotating body 20 is changed from the stopped state of the magnetic coupling device 700 shown in FIGS. 2, 3 and 22, as shown in FIG. Regarding the relative angle (torsion angle α) of the motor-side rotating body 10 with respect to the load-side rotating body 20, the torque (first torque) generated between the magnet part 12 and the magnet part 22 having four poles has a maximum value. The torque (second torque) generated between the magnet part 13 and the magnet part 23 which has a sinusoidal torque characteristic of about 1.25 N × m and one cycle of about 180 degrees and has 20 poles is the maximum The value is about 0.15 N × m, and it has a sinusoidal torque characteristic with a period of about 36 degrees, and the torque (third torque) generated between the magnet part 616 and the magnet part 624 having 12 poles is The maximum value is about 0.36N × m, and one period is about It has a 60-degree sinusoidal torque characteristic.

  As a result, in the load-side rotating body 20, the combined torque does not substantially change in the vicinity of about 1.00 N × m in the range from about 15 degrees to about 75 degrees, while the twist angle α is about 0 degrees. In the range from about 15 degrees to about 15 degrees and in the range from about 75 degrees to about 90 degrees, a torque characteristic in which the combined torque changes more than the combined torque in the range from about 15 degrees to about 75 degrees is obtained. At this time, the amount of change in the combined torque in the load-side rotating body 20 in the range from about 15 degrees to about 75 degrees ranges from about 0 degrees to about 15 degrees, and from about 75 degrees to about 90 degrees. The amount of change in the first torque and the amount of change in the second torque at are smaller.

  Further, the combined torque of the load-side rotator 20 provides a torque characteristic such that the combined torque does not substantially change in a wider range than the combined torque of the load-side rotator 20 in the first embodiment shown in FIG. .

  In addition, the effect of the 1st modification of 5th Embodiment is the same as that of 5th Embodiment.

(Second Modification of Fifth Embodiment)
Next, a second modification example of the fifth embodiment of the present invention will be described with reference to FIGS. In the magnetic coupling device 800 according to the second modification of the fifth embodiment, 8-pole magnet parts 817 and 825 are used instead of the 20-pole magnet parts 13 and 23 of the first modification example of the fifth embodiment. The case where it is provided will be described.

  In the magnetic coupling device 800 according to the second modification of the fifth embodiment of the present invention, as shown in FIG. 21, the magnet portions 817 are respectively located at the positions where the magnet portions 13 and 23 of the fifth embodiment are fixed. And 825 are fixed. That is, the magnet portion 817 is fixed along the rotation axis A on the X1 side of the inner surface 11a in the concave portion 11 of the motor-side rotating body 10, and the X1 side of the outer surface 21 of the load-side rotating body 20 is on the X1 side. The magnet portion 825 is fixed along the rotation axis A. Further, the magnet portion 817 and the magnet portion 825 are configured to be magnetically coupled in a state of facing each other in the radial direction (a direction orthogonal to the rotation axis A). The magnet unit 817 is an example of the “second magnet unit” in the present invention, and the magnet unit 825 is an example of the “fourth magnet unit” in the present invention.

  Further, the length L1 along the X direction of the magnet parts 12 and 22, the length L2 along the X direction of the magnet parts 817 and 825, and the length L3 along the X direction of the magnet parts 616 and 624 The ratio is configured to be approximately 70:62:17. That is, the area where the magnet part 12 and the magnet part 22 face each other is larger than the area where the magnet part 817 and the magnet part 825 face each other and the area where the magnet part 616 and the magnet part 624 face each other. In addition, the area of the area where the magnet part 817 and the magnet part 825 face each other is larger than the area where the magnet part 616 and the magnet part 624 face each other.

  Further, the torque (first torque) generated between the magnet unit 12 and the magnet unit 22 is configured to be about 0.7 N × m at the maximum. Further, the torque (second torque) generated between the magnet portion 817 and the magnet portion 825 is configured to be about 0.62 N × m at the maximum. Further, the torque (third torque) generated between the magnet part 616 and the magnet part 624 is configured to be about 0.17 N × m at the maximum.

  Here, in the second modification of the fifth embodiment, as shown in FIG. 25, in the magnet portion 817, four magnets 817a preliminarily magnetized to the N pole and four magnets preliminarily magnetized to the S pole. Magnets 817b are alternately arranged circumferentially at equal angular intervals (about 45 degrees). Further, in the magnet portion 825, four magnets 825a preliminarily magnetized to the S pole and four magnets 825b preliminarily magnetized to the N pole are alternately arranged at equal angular intervals (about 45 degrees) in a circumferential manner. Has been placed. That is, the number of magnetic poles of the magnet parts 817 and 825 is configured to be 8 poles.

  Further, as shown in FIGS. 21 and 25, the magnets 817a and 817b both have the same arcuate cross-sectional shape in the YZ plane (see FIG. 25) and are along the rotation axis A. Are arranged so as to extend in the X direction (see FIG. 21). Magnets 825a and 825b both have the same arcuate cross-sectional shape in the YZ plane (see FIG. 25) and extend in the X direction (see FIG. 21) along rotation axis A. Are arranged as follows.

  As shown in FIG. 25, in magnets 817a and 825b, the N pole is located on the magnet parts 825 and 817 side and the S pole is magnet part 825 in the radial direction (direction orthogonal to rotation axis A). And 817 are arranged on the opposite side. Magnets 817b and 825a are arranged so that the south pole is located on the magnet parts 825 and 817 side and the north pole is located on the opposite side of magnet parts 825 and 817 in the radial direction.

  In the stop state, the cross-sectional center position 817c of the magnet 817a and the cross-section center position 825d of the magnet 825b are arranged on a straight line extending in the radial direction (direction orthogonal to the rotation axis A). In addition, the N pole side of the magnet 817a and the N pole side of the magnet 825b are arranged so as to face each other. In the stop state, the center position 817d of the cross-sectional shape of the magnet 817b and the center position 825c of the cross-sectional shape of the magnet 825a are arranged on a straight line extending in the radial direction, and the S pole side of the magnet 817b The S pole side of the magnet 825a is disposed so as to face each other. That is, in the stopped state, the magnet portion 817 and the magnet portion 825 are configured such that the same magnetic poles face each other in the radial direction. As a result, the torque (third torque) generated between the magnet part 817 having 8 poles and the magnet part 825 has a maximum value of about 0.62 N × m and the magnet part 12 having 4 poles and the magnet. The frequency is twice as high as the frequency of the torque characteristic between the sections 22 (one cycle is about 90 degrees), and the phase is shifted by about 45 degrees (opposite phase) to form a sinusoidal torque characteristic. Has been.

  Magnets 817a, 817b, 825a, and 825b are all R-T-B magnets. The remaining configuration of the second modification example of the fifth embodiment is similar to that of the first modification example of the fifth embodiment.

  Next, with reference to FIG. 2, FIG. 22, FIG. 25 and FIG. 26, the combined torque of the magnetic coupling device 800 according to the second modification of the fifth embodiment of the present invention will be described.

  When the relative angle (twisting angle α) of the motor-side rotating body 10 with respect to the load-side rotating body 20 is changed from the stopped state of the magnetic coupling device 800 shown in FIGS. 2, 22 and 25, as shown in FIG. Regarding the relative angle (torsion angle α) of the motor-side rotating body 10 with respect to the load-side rotating body 20, the torque (first torque) generated between the magnet part 12 and the magnet part 22 having four poles has a maximum value. The torque (second torque) generated between the magnet part 817 and the magnet part 825 having a sinusoidal torque characteristic of about 0.7 N × m and one cycle of about 180 degrees is a maximum. The value is about 0.62 N × m, one cycle is about 90 degrees, the phase is about 45 degrees and the sine wave-like torque characteristic is shifted (opposite phase), and the magnet section 616 and magnet having 12 poles Torque generated between the first and second portions 624 (third Torque) is the maximum value of about 0.17 N × m, 1 cycle has a sinusoidal torque characteristic of approximately 60 degrees.

  As a result, the load-side rotator 20 has torque characteristics such that the combined torque is not substantially generated when the twist angle α is in the range of about 0 degrees to about 30 degrees. As a result, it is possible to suppress the transmission of torque when the twist angle α is in the range of about 0 degrees to about 30 degrees. When 10 rotates in the reverse direction, torque is suppressed from being transmitted in a range of about 30 degrees or less, so that the reverse rotation of the motor-side rotating body 10 is transmitted to the load-side rotating body 20. It is possible to suppress.

  In addition, the effect of the 2nd modification of 5th Embodiment is the same as that of 5th Embodiment.

  The embodiments and examples disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments and examples but by the scope of claims for patent, and includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the first to fifth embodiments, the load-side rotating body of the load side portion has a predetermined radial direction (a direction orthogonal to the rotation axis A) inside the recess of the motor-side rotating body of the motor side portion. Although the example arrange | positioned at intervals was shown, this invention is not limited to this. In the present invention, like the magnetic coupling device 900 of the second modification of the first embodiment shown in FIGS. 27 and 28, the load side rotating body 920 of the load side portion 902 is rotated by the motor side rotation of the motor side portion 901. You may comprise so that it may arrange | position with a predetermined space | interval in the X direction with the body 910. FIG. Specifically, as shown in FIGS. 27 and 28, a quadrupole magnet portion 912 and a 20-pole magnet portion 913 are provided on a side surface 911 on the X2 side (see FIG. 27) of the cylindrical motor-side rotating body 910. (Refer to FIG. 28) is fixed to a side surface 921 on the X1 side (refer to FIG. 27) of the cylindrical load-side rotating body 920, and a four-pole magnet unit 922 magnetically coupled to the magnet unit 912, The magnet part 913 and the 20-pole magnet part 923 (see FIG. 28) for magnetic coupling are fixed. In addition, as shown in FIG. 28, in the magnet portion 912 (922), two magnets 912a (922a) and two magnets 912b (922b) are alternately arranged at equal intervals (about 90 degrees) in a circumferential manner. Has been placed. Further, in the magnet portion 913 (923), ten magnets 913a (923a) and ten magnets 913b (923b) are alternately arranged in a circumferential manner at equiangular intervals (about 18 degrees). Moreover, the magnet part 913 (923) is arrange | positioned at the inner peripheral side of the magnet part 912 (922). The motor-side rotator 910 is an example of the “drive side portion” in the present invention, and the load-side rotator 920 is an example of the “driven side portion” in the present invention. The magnet parts 912, 913, 922, and 923 are examples of the “first magnet part”, “second magnet part”, “third magnet part”, and “fourth magnet part” of the present invention, respectively.

  Moreover, in the said 1st-5th embodiment, the load side rotary body of a load side part is the example arrange | positioned inside the recessed part of the motor side rotary body of a motor side part at predetermined intervals in the radial direction. However, the present invention is not limited to this. In the present invention, like the magnetic coupling device 1000 of the third modification of the first embodiment shown in FIG. 29, the load side rotating body 1020 of the load side portion 1002 is replaced with the motor side rotating body 1010 of the motor side portion 1001. You may comprise so that it may arrange | position with a predetermined space | interval in the X direction with the motor side rotary body 1010 in the state arrange | positioned inside the accommodating part 1011. FIG. Specifically, as shown in FIG. 29, a quadrupole magnet portion 1012 is fixed to the side surface 1011b on the X1 side of the accommodating portion 1011 formed inside the motor-side rotating body 1010, and the accommodating portion A 20-pole magnet portion 1013 is fixed to the side surface 1011c on the X2 side of 1011. Further, on the side surface 1020a on the X1 side of the disk-shaped load-side rotating body 1020, a four-pole magnet section 1022 that is magnetically coupled with the magnet section 1012 is fixed, and the load-side rotating body 1020 on the X2 side A 20-pole magnet portion 1023 that is magnetically coupled to the magnet portion 1013 is fixed to the side surface 1020b. The motor side rotating body 1010 is an example of the “driving side part” in the present invention, and the load side rotating body 1020 is an example of the “driven side part” in the present invention. Magnet portions 1012, 1013, 1022 and 1023 are examples of the “first magnet portion”, “second magnet portion”, “third magnet portion” and “fourth magnet portion” of the present invention, respectively.

  Moreover, in the said 1st-5th embodiment, the load side rotary body of a load side part is the example arrange | positioned inside the recessed part of the motor side rotary body of a motor side part at predetermined intervals in the radial direction. However, the present invention is not limited to this. In the present invention, like the magnetic coupling device 1100 of the fourth modification of the first embodiment shown in FIG. 30, the flat motor-side member 1110 of the motor side portion 1101 and the flat load of the load side portion 1102 The side member 1120 may be arranged at a predetermined interval, and the motor side member 1110 and the load side member 1120 may be configured to generate torque by relatively linearly moving in the X direction. Good. Specifically, as shown in FIG. 30, a magnet 1111 and a magnet 1113 having a different number of magnetic poles from the magnet 1112 are fixed to the motor-side member 1110. The load side member 1120 is fixed with a magnet portion 1122 that is magnetically coupled to the magnet portion 1112 and a magnet portion 1123 that is magnetically coupled to the magnet portion 1113. In the magnet portion 1112 (1122), magnets 1112a (1122a) and magnets 1112b (1122b) having different magnetic poles are alternately arranged at equal intervals along the X direction. In the magnet portion 1113 (1123), magnets 1113a (1123a) and magnets 1113b (1123b) having different magnetic poles are alternately arranged at equal intervals along the X direction. The motor side rotating body 1110 is an example of the “driving side part” of the present invention, and the load side rotating body 1120 is an example of the “driven side part” of the present invention. Moreover, the magnet parts 1112, 1113, 1122, and 1123 are examples of the “first magnet part”, “second magnet part”, “third magnet part”, and “fourth magnet part” of the present invention, respectively.

  Moreover, in the said 1st-4th embodiment, the magnet parts 12 and 13 (213) are each fixed to the X2 side and X1 side of the inner surface 11a in the recessed part 11 of the motor side rotary body 10 (410, 510). Moreover, although the example which fixed the magnet parts 22 and 23 (223) to the X2 side and X1 side of the outer side surface 21 of the load side rotary body 20, respectively was shown, this invention is not limited to this. For example, the magnet unit 12 is disposed at both ends in the X direction of the inner side surface 11a of the motor-side rotating body 10 (410, 510), and the magnet unit 13 (213 at the central portion in the X direction of the inner side surface 11a. ). In addition, magnet portions 22 corresponding to the magnet portions 12 are disposed at both ends in the X direction of the outer side surface 21 of the load-side rotating body 20, and a magnet portion 13 ( 213) may be arranged so as to arrange the magnet part 23 (223).

  Moreover, in the said 1st-5th embodiment, the example whose magnetic pole number of the magnet part which comprises a magnetic coupling apparatus is 4 poles, 8 poles, 12 poles, 16 poles, and 20 poles (multiple of 4) was shown. However, the present invention is not limited to this. For example, you may comprise so that it may contain 24 poles and 28 poles further as a magnetic pole number of the magnet part which comprises a magnetic coupling apparatus. Further, for example, the number of magnetic poles of the magnet portion constituting the magnetic coupling device may be a multiple of 3 such as 3 poles, 6 poles, and 9 poles. Moreover, you may comprise so that the multiple of 3 and the multiple of 4 may be combined. In other words, a combination of the number of magnetic poles of the magnet portion constituting the magnetic coupling device may be selected so that a desired torque characteristic can be obtained.

  In the third embodiment, the rotating part 414 can be fixed to the motor-side rotating body 410 by the screw tip of the screw 403 screwed into the screw hole 410b pressing the outer surface of the rotating part 414. Although an example is shown, the present invention is not limited to this. For example, when the engaging member formed on the rotating part 414 is engaged with the engaging part formed on the motor-side rotating body 410, the magnet part 13 can be rotated in a state of being shifted from the magnet part 23. It may be configured. Further, for example, by providing a screw hole into which the screw 403 is inserted in the rotating part 414 and screwing the rotating part 414 and the motor-side rotating body 410, the magnet part 13 is displaced with respect to the magnet part 23. It may be configured to be rotatable.

  In the third embodiment, the angle β is about −10 degrees (about +10 degrees), and in the fourth embodiment, the angle γ is about +9 degrees. The present invention is not limited to this. In the present invention, the angles β and γ may be any angle other than −10 degrees, +10 degrees, and +9 degrees.

  In the fourth embodiment, the yoke 515 can be fixed to the motor-side rotating body 510 by the screw tip of the screw 503 screwed into the screw hole 515c pressing the outer surface of the motor-side rotating body 510. However, the present invention is not limited to this. For example, the engaging member formed on the yoke 515 may be engaged with the engaging portion formed on the motor-side rotating body 510 so that the yoke 515 can be rotated in a different position. Further, for example, by providing a screw hole into which the screw 503 is inserted in the motor-side rotating body 510 and screwing the yoke 515 and the motor-side rotating body 510, the magnet unit 13 is displaced with respect to the magnet unit 23. You may comprise so that it can rotate in a state.

  Further, in the third embodiment, the groove portion 410a into which the rotating portion 414 is fitted is provided on the X1 side (the shaft portion 1a side) of the inner side surface 11a of the motor side rotating body 410, and in the fourth embodiment, the yoke 515 is provided. Although an example in which the groove portion 510c into which the motor is fitted is provided on the X1 side (the shaft portion 1a side) of the outer peripheral surface 510 of the motor-side rotator 510 is shown, the present invention is not limited to this. In the present invention, the groove portion into which the rotating portion or the yoke is fitted may be provided on the side opposite to the shaft portion of the motor-side rotating body. Thereby, it is possible to easily adjust the angular position of the rotating part or the yoke with respect to the motor-side rotating body.

  Moreover, in the said 1st-5th embodiment, although the magnet part showed the example which consists of a some magnet, this invention is not limited to this. In the present invention, the magnet portion may be composed of a single magnet, and may be configured to have a plurality of magnetic poles by being magnetized in different directions at intervals. For example, the magnet 1218 is magnetized by multipolarizing one magnet 1218 of the motor-side rotating body 1210 as in the magnetic coupling device 1200 of the fifth modification of the first embodiment of the present invention shown in FIG. Two magnets: a 4-pole (magnetized portion 1212a and 1212b (first magnetized portion)) magnet portion 1212 and a 12-pole (magnetized portion 1216a and 1216b (second magnetized portion)) magnet portion 1216 You may comprise so that it may have a part. Similarly, by magnetizing one magnet 1226 of the load-side rotor 1220 with multiple poles, the magnet 1226 has four poles (magnetized portions 1222a and 1222b (third magnetized portion)) and magnet portions 1222 and 12 You may comprise so that it may have two magnet parts with the magnet part 1224 of a pole (magnetized part 1224a and 1224b (4th magnetized part)). As a result, it is possible to magnetize a single magnet 1218 and 1226 so as to have a plurality of magnetic poles at once (multipolar magnetization), so that the motor-side rotating body 1210 and the load-side rotating body 1220 It is possible to simplify the manufacturing process. At this time, neutral zones 1218a and 1226a that are not magnetized are formed between the magnet portions of the magnets 1218 and 1226 and between the magnetized portions of the magnet portions, respectively.

  When magnetizing one magnet 1218 and 1226 with multiple poles, a magnetic pole pattern is formed for transfer to a magnetized yoke (not shown) made of a coil wound around an iron core. Then, by applying a pulsed large current to the magnetizing yoke, the magnetizing yoke becomes an electromagnet, and the magnetic pole pattern of the magnetizing yoke is transferred to the magnets 1218 and 1226. As a result, the magnets 1218 and 1226 are multipolarized.

  32, the magnet 1318 of the motor-side rotating body 1310 includes three magnet parts (four-pole magnet parts 1312, 8) as in the magnetic coupling device 1300 of the third modification of the fifth embodiment of the present invention shown in FIG. The magnet 1326 of the load side rotating body 1320 is magnetized into three magnet parts (a four-pole magnet part 1322 and an eight-pole magnet part 1325). And multipolar magnetization so as to have a 12-pole magnet portion 1324). Alternatively, one magnet of the motor-side rotating body and one magnet of the load-side rotating body may be multipolar magnetized so as to have four or more magnet portions.

  Moreover, although the said 1st-5th embodiment showed the example which used the R-T-B system sintered magnet as the magnet parts 12, 13, 22, 23, 213, 223, 817, and 825, this The invention is not limited to this. In the present invention, an Sm—Co rare earth magnet or a ferrite magnet may be used depending on the application. Moreover, it may not be a sintered magnet, for example, a bond magnet may be sufficient. Moreover, you may vary the kind of magnet used for a magnet part according to a use condition. For example, a magnet having a high coercive force may be disposed at a high temperature state where demagnetization is likely to occur, while a magnet having a high residual magnetic flux density may be disposed at a location that is not at a high temperature.

10, 410, 510, 910, 1010, 1110, 1210, 1310 Motor side rotating body (drive side part)
12, 912, 1012, 1112, 1212 Magnet part (first magnet part)
12c, 12d, 13c, 13d, 22c, 22d, 23c, 23d, 213c, 213d, 223c, 223d, 616c, 616d, 624c, 624d, 817c, 817d, 825c, 825d Center position 13, 213, 817, 913, 1013 1113, 1216 Magnet part (second magnet part)
20, 920, 1020, 1120, 1220, 1320 Load side rotating body (driven side part)
22, 922, 1022, 1122, 1222 Magnet part (third magnet part)
23, 223, 825, 923, 1023, 1123, 1224 Magnet part (fourth magnet part)
100, 200, 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300 Magnetic coupling device 515 Yoke 616 Magnet part (fifth magnet part)
624 Magnet part (sixth magnet part)
1212a, 1212b Magnetized part (first magnetized part)
1216a, 1216b Magnetized part (second magnetized part)
1222a, 1222b Magnetized part (third magnetized part)
1224a, 1224b Magnetized part (fourth magnetized part)
A rotation axis

Claims (15)

A drive side portion including a first magnet portion and a second magnet portion having different numbers of magnetic poles;
A third magnet portion and a fourth magnet that have magnetic pole numbers corresponding to the first magnet portion and the second magnet portion, respectively, and are magnetically coupled to face the first magnet portion and the second magnet portion, respectively. And a driven side portion that is arranged at a predetermined interval from the driving side portion and configured to generate torque in a non-contact state by driving the driving side portion. .   The number of magnetic poles of the first magnet part and the third magnet part and the number of magnetic poles of the second magnet part and the fourth magnet part are selected so that a desired torque characteristic is obtained in the driven side part. The magnetic coupling device according to claim 1.   3. The magnetic coupling device according to claim 2, wherein the number of magnetic poles of the second magnet unit and the fourth magnet unit is an integer multiple of two or more of the number of magnetic poles of the first magnet unit and the third magnet unit. By combining the first torque generated between the first magnet unit and the third magnet unit and the second torque generated between the second magnet unit and the fourth magnet unit, It is configured to generate a combined torque at the driven side portion,
The amount of change in the combined torque with respect to changes in the relative positional relationship between the first magnet portion and the third magnet portion and the relative positional relationship between the second magnet portion and the fourth magnet portion is the first amount. The number of magnetic poles of the first magnet portion and the third magnet portion, and the number of magnetic poles of the second magnet portion and the fourth magnet portion so as to be smaller than the amount of change of one torque and the amount of change of the second torque. The magnetic coupling device according to claim 2 or 3, wherein a combination with is selected.   The number of magnetic poles of the first magnet portion and the third magnet portion, and the first magnet portion so that the amount of change in the combined torque in the vicinity of the rated torque is smaller than the amount of change in the combined torque in the vicinity of the rated torque. The magnetic coupling device according to claim 4, wherein a combination of two magnet parts and the number of magnetic poles of the fourth magnet part is selected.   The amount of change in the combined torque with respect to changes in the relative positional relationship between the first magnet portion and the third magnet portion and the relative positional relationship between the second magnet portion and the fourth magnet portion is the first amount. The number of magnetic poles of the first magnet part and the third magnet part, and the number of magnetic poles of the second magnet part and the fourth magnet part, so as to be larger than the amount of change of one torque and the amount of change of the second torque. The magnetic coupling device according to claim 2 or 3, wherein a combination with is selected. The number of magnetic poles of the first magnet part and the third magnet part is less than the number of magnetic poles of the second magnet part and the fourth magnet part,
The area of the area | region where the said 1st magnet part and the said 3rd magnet part oppose is larger than the area of the area | region where the said 2nd magnet part and the said 4th magnet part oppose. 2. A magnetic coupling device according to item 1. The number of magnetic poles of the first magnet part and the third magnet part is four poles,
The magnetic coupling device according to claim 1, wherein the number of magnetic poles of the second magnet unit and the fourth magnet unit is 20 poles.   In the stopped state, at least one of the center position of the magnetic pole of the first magnet part and the center position of the magnetic pole of the second magnet part is the center position of the magnetic pole of the corresponding third magnet part, and the corresponding The magnetic coupling device according to claim 1, wherein the magnetic coupling device is disposed so as to be shifted from a center position of a magnetic pole of the fourth magnet portion.   A yoke capable of adjusting at least one of the strength of the magnetic field between the first magnet portion and the third magnet portion and the strength of the magnetic field between the second magnet portion and the fourth magnet portion. The magnetic coupling device according to claim 1, further comprising: The drive side portion is configured to be rotatable around a rotation axis,
The driven side portion is disposed at a predetermined interval from the driving side portion, and is configured to be rotatable around the rotation axis in a non-contact state by rotation of the driving side portion,
The first magnet part and the second magnet part, and the third magnet part and the fourth magnet part both have a direction in which the first magnet part and the third magnet part face each other, and The magnetic coupling device according to any one of claims 1 to 10, wherein the two magnet portions and the fourth magnet portion are arranged so as to be aligned in a direction orthogonal to a facing direction. The driven side portion is disposed at a predetermined interval from the drive side portion in a radial direction orthogonal to the rotation axis.
The first magnet part and the second magnet part, and the third magnet part and the fourth magnet part are both arranged in a direction along the rotational axis. Magnetic coupling device. The driving side part further includes a fifth magnet part having a number of magnetic poles different from the number of magnetic poles of the first magnet part and the number of magnetic poles of the second magnet part,
The said driven side part further has the 6th magnet part which carries out a magnetic coupling in the state facing the said 5th magnet part while having the number of magnetic poles corresponding to the said 5th magnet part. 2. A magnetic coupling device according to item 1. The first magnet part and the second magnet part of the driving side part are respectively composed of a plurality of magnets having the same number as the number of magnetic poles of the first magnet part and a plurality of magnets having the same number as the number of magnetic poles of the second magnet part. Become
The third magnet portion and the fourth magnet portion of the driven side portion are respectively composed of a plurality of magnets having the same number as the number of magnetic poles of the third magnet portion and a plurality of magnets having the same number as the number of magnetic poles of the fourth magnet portion. The magnetic coupling device according to any one of claims 1 to 13. The driving side portion and the driven side portion are each composed of one magnet,
The first magnet portion and the second magnet portion of the driving side portion are each provided with a plurality of first attachments having the same number as the number of magnetic poles of the first magnet portion, when the one magnet is magnetized in multiple poles. A plurality of second magnetized portions having the same number as the number of magnetic poles of the magnetic portion and the second magnet portion,
The third magnet portion and the fourth magnet portion of the driven side portion have a plurality of third attachments having the same number as the number of magnetic poles of the third magnet portion, respectively, by multipolar magnetization of the one magnet. The magnetic coupling device according to claim 1, comprising a plurality of fourth magnetized portions having the same number as the number of magnetic poles of the magnetic portion and the fourth magnet portion.

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