JP2013038952A - Magnetic coupling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnetic coupling device which sufficiently suppresses the occurrence of eddy current in a partition wall part and thereby suppressing the energy loss caused when driving force is transmitted while improving the strength of the partition wall part.SOLUTION: A magnetic coupling device 100 includes: a load side rotating body 10 including magnet parts 12; a driving source side rotating body 20 including magnet parts 22 magnetically coupling to the magnet parts 12; and a partition wall part disposed at a position which is located between the load side rotating body 10 and the driving source side rotating body 20 and faces the magnet parts 12, for separating the load side rotating body 10 from the driving source side rotating body 20. The partition wall part includes a wall part 34 made of a nonmagnetic resin material, and twelve reinforcement plates 33 arranged at intervals twice as wide as those of magnet poles of magnet part 12 in a rotation direction B, and made of a nonmagnetic metal material.

Description

  The present invention relates to a magnetic coupling device, and more particularly to a magnetic coupling device including a partition wall portion disposed between a first rotating body and a second rotating body.

  2. Description of the Related Art Conventionally, in a magnetic coupling device, a partition made of a nonmagnetic metal material is provided between a first rotating body and a second rotating body in order to isolate the first rotating body and the second rotating body that are magnetically coupled to each other. The part is arranged. However, when the magnetic coupling device is driven, there is an inconvenience that energy loss is increased when the driving force is transmitted due to the generation of eddy current in the partition made of a metal material. Therefore, conventionally, in order to maintain the strength of the partition wall part while suppressing the generation of eddy current, a wall part made of a resin material that is nonmagnetic and has high electrical resistance, and a metal reinforcing material for reinforcement, There has been proposed a magnetic coupling device that includes a partition wall portion including (for example, see Patent Document 1).

  In the above-mentioned Patent Document 1, a disk-like driving side rotating body including a permanent magnet arranged circumferentially on the surface, a position facing the driving side rotating body, and a magnetic coupling with the permanent magnet. There is disclosed a magnet coupling pump (magnetic coupling device) including a disk-shaped driven-side rotating body and a disk-shaped partition wall disposed between the driving-side rotating body and the driven-side rotating body. The partition wall of the magnet coupling pump is composed of a reinforcing portion made of nonmagnetic austenitic stainless steel and a wall portion made of a nonmagnetic resin material. The reinforcing part has an annular outer frame and a net part formed in a lattice shape inside the outer frame, and the wall part is formed so as to cover the net part of the reinforcing part. Yes. In addition, the above Patent Document 1 does not disclose or suggest a detailed configuration such as the size of the lattice of the mesh portion of the reinforcing portion.

Japanese Patent Laid-Open No. 60-26429

  However, there is a problem (problem) that it is difficult to sufficiently suppress the generation of eddy currents in the net even if the reinforcing net made of stainless steel disclosed in Patent Document 1 is provided. .

  The present invention has been made to solve the above-described problems, and one object of the present invention is to sufficiently suppress the generation of eddy currents in the partition wall portion while improving the strength of the partition wall portion. By this, it is providing the magnetic coupling apparatus which can suppress the energy loss at the time of transmitting a driving force.

Means for Solving the Problems and Effects of the Invention

  A magnetic coupling device according to one aspect of the present invention includes a first rotating body including first magnet portions in which different magnetic poles are alternately arranged along a rotation direction, and a second magnet that is magnetically coupled to the first magnet portion. Between the first rotating body and the second rotating body, the second rotating body including any one of the first part and the yoke and arranged to be relatively rotatable in a non-contact state with respect to the first rotating body And a partition that is disposed at a position facing the first magnet unit and that separates the first rotating body and the second rotating body, the partition including a wall made of a nonmagnetic resin material, and a rotating part A plurality of reinforcing portions made of a non-magnetic metal material, each disposed at every even number of magnetic poles of the first magnet portion along the direction.

  In the magnetic coupling device according to one aspect of the present invention, as described above, the partition wall portion disposed at a position facing the first magnet portion is arranged every even number of magnetic poles of the first magnet portion along the rotation direction. By including a plurality of reinforcing portions made of a nonmagnetic metal material, the total amount of magnetic flux from the first magnet portion or the magnetic flux from the first magnet portion and the second magnet portion in the region sandwiched between the reinforcing portions. The total amount does not change much as the first rotating body rotates. That is, when arranging the plurality of reinforcing portions of the partition wall at every even number of magnetic poles of the first magnet portion, in the initial state (state at a certain point in time), the region of the first magnet portion is sandwiched between the reinforcing portions. One magnetic pole (for example, N pole) and the other magnetic pole (for example, S pole) are both positioned by the same integer multiple. In this state, since the integral multiple N pole and the integral multiple S pole exist in the same area, the total amount (vector amount) of the magnetic flux from the first magnet section in the region sandwiched between the reinforcement sections or the first The total amount of magnetic flux from the magnet part and the second magnet part is substantially zero. When the first rotating body is rotated by one magnetic pole from the initial state, the other magnetic pole (N pole) of the first magnet portion and the one magnetic pole are located in the region sandwiched between the reinforcing portions, as in the initial state. Both (S poles) are positioned by the same integer multiple. Even in this state, since the integral multiple N pole and the integral multiple S pole exist in the same area, the total amount (vector amount) of the magnetic flux from the first magnet section in the region sandwiched between the reinforcement sections or the first The total amount of magnetic flux from the magnet part and the second magnet part is substantially zero. That is, the total amount of magnetic flux from the first magnet portion in the region sandwiched between the reinforcing portions before and after the rotation hardly changes. In the present invention, only one of the first rotating body and the second rotating body may be configured to be rotatable, or both the first rotating body and the second rotating body may be configured to be rotatable. Good.

  Thus, when the total amount of magnetic flux from the first magnet portion or the total amount of magnetic flux from the first magnet portion and the second magnet portion in the region sandwiched between the reinforcing portions hardly changes, the direction to cancel the change in the magnetic flux Generation of eddy current is sufficiently suppressed. As a result, the partition wall portion is disposed at every even number of magnetic poles of the first magnet portion along the rotation direction, and includes a plurality of reinforcing portions made of a nonmagnetic metal material, thereby transmitting the driving force. Energy loss can be suppressed.

  In the magnetic coupling device according to one aspect of the present invention, as described above, by arranging a plurality of reinforcing portions along the rotation direction, the reinforcing portions are configured to extend in a direction intersecting the rotation direction. Therefore, the strength of the partition wall can be improved.

  In the magnetic coupling device according to the aforementioned aspect, preferably, the plurality of reinforcing portions are arranged at substantially the same intervals every even number of magnetic poles of the first magnet portion along the rotation direction. If comprised in this way, the whole partition part can be equally reinforced by the some reinforcement part arrange | positioned at the substantially same space | interval.

  In this case, preferably, in the first magnet portion, different magnetic poles are alternately arranged at predetermined angular intervals along the rotation direction, and the plurality of reinforcing portions are magnetic poles of the first magnet portion along the rotation direction. Are arranged at substantially the same angular intervals every even multiple of the predetermined angular interval. In the magnetic coupling device using the first magnet unit in which the different magnetic poles are alternately arranged at predetermined angular intervals along the rotation direction as described above, the plurality of reinforcing portions are arranged in the first direction along the rotation direction. By arranging the magnetic poles of the magnet part at substantially equal angular intervals at even multiples of predetermined angular intervals in the magnetic poles, it is possible to effectively reinforce the partition wall part while sufficiently suppressing the generation of eddy currents. .

  In the magnetic coupling device in which the plurality of reinforcing portions are arranged at substantially equal angular intervals at even multiples of predetermined angular intervals, preferably, the plurality of reinforcing portions are the first magnet portions along the rotation direction. The magnetic poles are arranged at substantially the same angular intervals at intervals of twice the predetermined angular interval. If comprised in this way, since the space | interval of reinforcement parts can be made closer, a partition part can be reinforced more effectively.

  In the magnetic coupling device according to the above aspect, it is preferable that the magnetic coupling device further includes a connecting portion that connects each end portion of the plurality of reinforcing portions. If comprised in this way, a partition part can be reinforced more by the connection part which connects each edge part of a reinforcement part and a reinforcement part. In addition, even when the eddy current is configured to flow to the pair of reinforcing portions via the connecting portion, the partition portion disposed at a position facing the first magnet portion is the first along the rotation direction. Since the eddy current is sufficiently prevented from being generated by including a plurality of reinforcing portions made of a nonmagnetic metal material and arranged at every even number of magnetic poles of one magnet portion, when transmitting a driving force Energy loss can be suppressed.

  In the magnetic coupling device according to the above aspect, preferably, the plurality of reinforcing portions are in a direction crossing the rotation direction so as to cover a portion of 3% to 20% of the entire circumference of the circle along the rotation direction. It extends. If comprised in this way, the intensity | strength of a partition part originates in the reinforcement | strengthening by a reinforcement part being inadequate by covering the 3% or more part of the perimeter of the circle along a rotation direction with a some reinforcement part. Can be suppressed. Moreover, even when a change in magnetic flux occurs, the eddy current generated in the reinforcing portion is reduced by covering a portion of 20% or less of the entire circumference of the circle along the rotation direction with the plurality of reinforcing portions. Therefore, it is possible to suppress energy loss when transmitting the driving force.

  In the magnetic coupling device according to the above aspect, the thickness of the wall portion is preferably smaller than the thickness of each of the plurality of reinforcing portions. If comprised in this way, the thickness of a wall part can be made small and the thickness of the whole partition part can be made small, enlarging the thickness of a reinforcement part and fully reinforcing a partition part.

  In the magnetic coupling device according to the one aspect described above, preferably, the wall portion of the partition wall portion is formed in a cylindrical shape along the rotation direction, and the plurality of reinforcing portions are the inner surface or the outer surface of the cylindrical wall portion. The side surface is formed so as to extend along the extending direction of the cylinder. According to this structure, in the cylindrical magnetic coupling device, the first magnet extends along the rotation direction while extending along the extending direction (axial direction) of the cylinder on the inner surface or the outer surface of the cylindrical wall portion. The generation of eddy currents is sufficiently suppressed by the plurality of reinforcing portions arranged at every even number of magnetic poles of the portion, so that energy loss when transmitting the driving force is reduced in the cylindrical magnetic coupling device. Can be suppressed.

  In this case, preferably, one of the first rotating body and the second rotating body is formed in a cylindrical shape, and the other of the first rotating body and the second rotating body is a cylindrical first. The magnetic poles different from each other in the first magnet unit are arranged inside either the cylindrical first rotating body or the second rotating body so as to sandwich the cylindrical partition wall between the rotating body and the second rotating body. Are extended along the extending direction of the cylinder on the side surface facing the second rotating body and are alternately arranged along the rotating direction. With this configuration, in the cylindrical magnetic coupling device, the plurality of reinforcing portions extending along the extending direction of the cylinder on the inner surface or the outer surface of the cylindrical wall portion, and extending along the extending direction of the cylinder. Thus, it is possible to easily arrange the first magnet portions arranged in such a manner as to face each other.

  In the magnetic coupling device in which the wall portion of the partition wall portion is formed in a cylindrical shape, it is preferably disposed at an end portion of the cylindrical wall portion, and is a disc shape that separates the first rotating body and the second rotating body. The lid part is further provided. If comprised in this way, in a cylindrical magnetic coupling apparatus, a 1st rotary body and a 2nd rotary body can be isolated by a partition part and a disk-shaped cover part.

  In the magnetic coupling device further including the disk-shaped lid, preferably, the lid is made of a metal material, and each end of each of the plurality of reinforcements is welded to each of the plurality of reinforcements. It is a connection part which connects the edge part. If comprised in this way, a partition part can be further reinforced with the cover part which connects each edge part of a reinforcement part and a reinforcement part. Further, even when the eddy current is configured to flow to the pair of reinforcing portions via the lid portion, the partition wall portion disposed at a position facing the first magnet portion is the first along the rotation direction. Since the eddy current is sufficiently prevented from being generated by including a plurality of reinforcing portions made of a nonmagnetic metal material and arranged at every even number of magnetic poles of one magnet portion, when transmitting a driving force Energy loss can be suppressed.

  In the magnetic coupling device according to the above aspect, each of the plurality of reinforcing portions is preferably made of a metal plate. By configuring in this way, the width of the direction perpendicular to the thickness direction of the reinforcing portion can be increased while reducing the thickness of the reinforcing portion, so that the thickness of the reinforcing portion is suppressed and the partition wall portion is suppressed. Can be effectively reinforced.

  In the magnetic coupling device according to the above aspect, each of the plurality of reinforcing portions is preferably made of a metal wire. If comprised in this way, a some reinforcement part can be easily arrange | positioned for every even-number magnetic pole of a 1st magnet part along a rotation direction, respectively.

  In this case, preferably, each of the plurality of reinforcing portions is made of a plurality of metal wires. If comprised in this way, the intensity | strength of each reinforcement part can be improved by using a several metal wire rod as one reinforcement part. In addition, by arranging the wires so as to extend along the direction orthogonal to the thickness direction, the strength of the reinforcing portion can be improved without increasing the thickness of the reinforcing portion made of a plurality of metal wires. Moreover, the degree of reinforcement of a wall part can be easily varied by varying the number of wires.

  In the magnetic coupling device according to the above aspect, preferably, the first rotating body and the second rotating body are formed in a disk shape so as to face each other, and the different magnetic poles of the first magnet portion are provided in the second rotation. The surface facing the body is alternately arranged along the rotation direction, and the plurality of reinforcing portions are formed to extend in the radial direction from the center of the circle along the rotation direction, and the wall portion is It is formed so as to cover at least a plurality of reinforcing portions. According to this structure, in the disk-shaped magnetic coupling device, the magnetic pole device is formed so as to extend in the radial direction from the center of the circle along the rotation direction, and the even number of magnetic poles of the first magnet unit along the rotation direction. The generation of eddy currents is sufficiently suppressed by the plurality of reinforcing portions arranged at intervals, so that energy loss when transmitting the driving force can be suppressed in the disk-shaped magnetic coupling device.

  In the magnetic coupling device according to the above aspect, the reinforcing portion is preferably made of nonmagnetic stainless steel. If comprised in this way, while being able to suppress that a transmission torque fluctuates, it can suppress that a reinforcement part corrodes.

1 is a cross-sectional view illustrating a magnetic coupling device according to a first embodiment of the present invention. It is sectional drawing of the magnetic coupling apparatus along the 900-900 line | wire of FIG. It is sectional drawing which showed the reinforcement part periphery in the initial state of the magnetic coupling apparatus by 1st Embodiment of this invention. It is the perspective view which showed the isolation part of the magnetic coupling apparatus by 1st Embodiment of this invention. It is the disassembled perspective view which showed the isolation part of the magnetic coupling apparatus by 1st Embodiment of this invention. It is the schematic diagram which showed the opposing condition of the reinforcement part and magnet part in the initial state of the magnetic coupling apparatus by 1st Embodiment of this invention. It is sectional drawing which showed the reinforcement part periphery in the state rotated by 1 magnetic pole of the magnetic coupling apparatus by 1st Embodiment of this invention. It is the schematic diagram which showed the opposing condition of the reinforcement part and magnet part in the state rotated by 1 magnetic pole of the magnetic coupling apparatus by 1st Embodiment of this invention. 6 is a cross-sectional view showing the periphery of a metal member of a magnetic coupling device according to Comparative Example 1. FIG. 6 is a cross-sectional view showing the periphery of a reinforcing portion in an initial state of a magnetic coupling device according to Comparative Example 2. FIG. It is the schematic diagram which showed the opposing condition of the reinforcement part and magnet part in the initial state of the magnetic coupling apparatus by the comparative example 2. 10 is a cross-sectional view showing the periphery of a reinforcing portion of a magnetic coupling device according to Comparative Example 3. FIG. 10 is a cross-sectional view showing a periphery of a reinforcing portion in a state where the magnetic coupling device according to Comparative Example 2 is rotated by one magnetic pole. It is the schematic diagram which showed the opposing condition of the reinforcement part in the state rotated by 1 magnetic pole of the magnetic coupling apparatus by the comparative example 2, and a magnet part. It is the schematic diagram which showed the opposing condition of the reinforcement part and magnet part of the magnetic coupling apparatus by the 1st modification of 1st Embodiment of this invention. It is sectional drawing which showed the reinforcement part periphery in 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. It is the side view which showed the magnet part of the magnetic coupling apparatus by 3rd Embodiment of this invention. It is sectional drawing which showed the reinforcement member of the magnetic coupling apparatus by 3rd Embodiment of this invention. It is sectional drawing which showed the wall part of the magnetic coupling apparatus by 3rd Embodiment of this invention. It is sectional drawing which showed the magnetic coupling apparatus by the 2nd modification of 1st Embodiment of this invention.

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

(First embodiment)
First, with reference to FIGS. 1-8, the magnetic coupling apparatus 100 by 1st Embodiment of this invention is demonstrated.

  As shown in FIG. 1, a cylindrical magnetic coupling device 100 according to the first embodiment of the present invention includes a load side portion 1 that transmits a driving force to a load portion (not shown), and a driving force that is transmitted from a driving source (not shown). In addition, a drive source side portion 2 that transmits a driving force to the load side portion 1 and a separating member 3 that separates the space on the load side portion 1 side and the space on the drive source side portion 2 side are provided. Further, both the load side portion 1 and the drive source side portion 2 are configured to be rotatable about a rotation axis A extending in the X direction as a rotation center. On the other hand, the isolation member 3 is fixed so as not to rotate and move. Further, the space on the load side 1 side is configured so that the atmospheric pressure (internal pressure) is higher than the space on the drive source side 2 side.

  The load side portion 1 has one end side (X1 side) connected to a load portion (not shown) made up of a drive unit, etc., and a shaft portion 1a extending to the X1 side, and the other end portion side (X2 side) of the shaft portion 1a. The load side rotating body 10 connected is included. Further, the drive source side portion 2 is connected to a drive source (not shown) at one end side (X2 side), connected to the shaft portion 2a extending to the X2 side, and the other end portion side (X1 side) of the shaft portion 2a. Drive source side rotating body 20. The load-side rotator 10 and the drive source-side rotator 20 are examples of the “second rotator” and the “first rotator” in the present invention, respectively.

  The load side rotator 10 includes a wheel part 11 and a magnet part 12, and the drive source side rotator 20 includes a cylindrical part 21 and a magnet part 22. The wheel portion 11 is formed in a disc shape centered on the rotational axis A, and the cylindrical portion 21 is formed in a cylindrical shape centered on the rotational axis A and having an opening on the X1 side. The wheel portion 11 has a contact portion 11a formed along the outer periphery of the disk and extending in the X direction. The magnet portion 12 is arranged on the outer peripheral surface 11b of the contact portion 11a. Moreover, both the contact part 11a of the wheel part 11 and the internal peripheral surface of the cylindrical part 21 consist of members containing ferromagnetic materials, such as common carbon steel, such as SS400, and have a function as a yoke. Further, the wheel portion 11 and the magnet portion 12 of the load side rotating body 10 are arranged inside the cylindrical portion 21 of the driving source side rotating body 20. The magnet parts 12 and 22 are examples of the “second magnet part” and the “first magnet part” in the present invention, respectively.

  In addition, as shown in FIG. 2, the magnet portion 12 includes an N pole 12a formed by 12 magnets having substantially the same shape, and an S pole 12b formed by 12 magnets. , And are arranged alternately along a circumferential (rotating) direction B around the rotation axis A. Further, as shown in FIG. 1, twelve N poles 12 a and twelve S poles 12 b are arranged to extend in the X direction on the outer peripheral surface 11 b of the wheel portion 11. As shown in FIG. 2, in the magnet portion 22, the N pole 22 a formed by 12 magnets having substantially the same shape and the S pole 22 b formed by 12 magnets have a rotation direction. Alternatingly arranged along B. Further, as shown in FIG. 1, the 12 N poles 22 a and the 12 S poles 22 b are arranged on the inner peripheral surface 21 a of the cylindrical portion 21 so as to extend in the X direction.

  That is, the magnet portions 12 and 22 both have 24 magnetic poles, and the magnetic poles are arranged at substantially the same angular intervals every angle α1 of about 15 degrees. Further, the N pole 12a, the S pole 12b, the N pole 22a, and the S pole 22b are in the radial direction of the wheel portion 11 and the cylindrical portion 21 (a direction orthogonal to the rotation direction B and extending radially from the rotation axis A). They have substantially the same thickness.

  Moreover, the magnet part 12 and the magnet part 22 are comprised so that it may carry out a magnetic coupling mutually. Specifically, as shown in FIG. 3, in the initial state of the magnetic coupling device 100, the N pole 12 a of the magnet unit 12 and the S pole 22 b of the magnet unit 22 face each other, and the S pole of the magnet unit 12. 12b and the N pole 22a of the magnet portion 22 are configured to face each other. As shown in FIG. 2, when the drive source side rotating body 20 (see FIG. 1) rotates around the rotation axis A, the S pole 12 b of the magnet portion 12 of the load side rotating body 10 (see FIG. 1) Then, it is driven in a state slightly deviated from the N pole 22a of the opposing magnet portion 22 and rotates along the rotational direction B. Similarly, the N-pole 12a of the magnet unit 12 is driven in a state slightly shifted from the S-pole 22b of the opposing magnet unit 22, and is rotated and moved along the rotation direction B. Rotates around the rotation axis A together with the drive source side rotating body 20. As a result, the driving force around the rotation axis A of the drive source side rotating body 20 is transmitted as the driving force around the rotation axis A of the load side rotating body 10.

  As shown in FIG. 1, the isolation member 3 includes a frame portion 3 a and an isolation portion 30 that is fixed to the frame portion 3 a by screws 4 described later. The frame portion 3a is provided with a screw hole 3b at a position corresponding to a through hole 31a of the flange portion 31 described later. As shown in FIGS. 4 and 5, the separating portion 30 includes a flange portion 31 disposed on the load side (X1 side) and formed in an annular shape, and a disk disposed on the drive source side (X2 side). A lid portion 32 formed in a shape, twelve reinforcing plates 33 extending in the direction (X direction) in which the rotation axis A extends, and a cylindrical wall portion disposed inside the reinforcing plate 33 and extending in the X direction 34. The flange portion 31 and the lid portion 32 are examples of the “connecting portion” in the present invention. The reinforcing plate 33 is an example of the “reinforcing portion” in the present invention.

  The flange portion 31, the lid portion 32, and the reinforcing plate 33 are all made of nonmagnetic austenitic stainless steel. The wall portion 34 is made of a non-magnetic resin material such as a fluorine resin, vinyl chloride, or ABS resin having chemical resistance. Here, since the wall part 34 consists of resin materials, the wall part 34 has a large electrical resistance. Thereby, even if the magnetic flux passing through the wall portion 34 is changed by the rotation of the magnet portions 12 and 22, the eddy current due to electromagnetic induction is hardly generated in the wall portion 34.

  The flange portion 31 and the reinforcing plate 33 are welded to each other on the X1 side of the reinforcing plate 33, and the lid portion 32 and the reinforcing plate 33 are welded to each other on the X2 side of the reinforcing plate 33. Thus, the twelve reinforcing plates 33 are connected to each other by the flange portion 31 and the lid portion 32.

  Further, the cylindrical wall portion 34 is formed to be slightly smaller in the radial direction than the inner peripheral surface of the flange portion 31 and the inner peripheral surface of the disc-shaped lid portion 32. Therefore, the wall portion 34 is disposed at a position sandwiched between the flange portion 31 and the lid portion 32 so as to correspond to the reinforcing plate 33. In this state, the reinforcing plate 33 is arranged on the outer surface of the wall portion 34 so as to extend along the extending direction of the cylinder (X direction).

  Further, as shown in FIG. 1, the reinforcing plate 33 and the wall portion 34 are sandwiched between the load-side rotator 10 and the drive-source-side rotator 20 and the cylindrical portion 21 of the drive-source-side rotator 20. It is arranged inside. Further, the reinforcing plate 33 and the wall portion 34 are arranged at positions where the magnet portion 12 of the load side rotating body 10 and the magnet portion 22 of the driving source side rotating body 20 face each other in the radial direction. Here, the twelve reinforcing plates 33 are disposed at positions spaced apart from the magnet portion 12 of the load-side rotator 10 by a predetermined gap in the radial direction, and the wall portion 34 is formed of the drive source-side rotator. It is arranged at a position spaced apart from the 20 magnet portions 22 by a predetermined gap in the radial direction. As a result, the reinforcing plate 33 and the wall 34 are sandwiched between the load side rotating body 10 and the drive source side rotating body 20 in a non-contact state with the load side rotating body 10 and the drive source side rotating body 20. Is arranged.

  Further, the reinforcing plate 33 and the wall portion 34 are formed so as to have substantially the same length in the X direction. The reinforcing plate 33 is made of a plate material having a thickness t1 of about 5 mm in the radial direction, and the wall portion 34 has a thickness t2 of about 1 mm in the radial direction. That is, the thickness t2 of the wall portion 34 is smaller than the thickness t1 of the reinforcing plate 33.

  Further, as shown in FIG. 4, the collar portion 31 is provided with a plurality of through holes 31 a at a predetermined distance along the rotation direction B. Thereby, as shown in FIG. 1, the isolation | separation part 30 is being fixed to the flame | frame part 3a by screwing the screw 4 in the through-hole 31a.

  Here, in the first embodiment, as shown in FIG. 2, each of the twelve reinforcing plates 33 is arranged at substantially the same angular interval every other angle α2 of about 30 degrees along the rotation direction B. . That is, the twelve reinforcing plates 33 are arranged at substantially the same angular intervals at intervals of twice the angular interval (angle α1) for each magnetic pole of the magnet portions 12 and 22. Here, in the initial state shown in FIGS. 3 and 6, a region C (see FIG. 6) sandwiched between a certain reinforcing plate 33 and the adjacent reinforcing plate 33 includes a region facing the N pole 22 a of the magnet portion 22. And a region facing the S pole 22b. At this time, both the region facing the N pole 22a and the region facing the S pole 22b have a length L1 in the rotation direction B. That is, since the magnetic flux emitted from the N pole 22a and the magnetic flux directed to the S pole 22b are substantially the same, the total amount (vector amount) of the magnetic flux passing through the region C is substantially zero.

  Then, from the initial state shown in FIGS. 3 and 6, when the load side rotating body 10 and the drive source side rotating body 20 are rotated by one magnetic pole (about 15 degrees) as shown in FIGS. 7 and 8, As shown in FIG. 8, the region C includes a region facing the S pole 22b and a region facing the N pole 22a. At this time, both the region facing the N pole 22a and the region facing the S pole 22b have a length L1 in the rotation direction B. That is, the total amount of magnetic flux passing through the region C is substantially zero, as in the initial state. As a result, the total amount of magnetic flux passing through the region C does not change much regardless of the rotation state around the rotation axis A of the load side rotating body 10 and the drive source side rotating body 20.

  Further, as shown in FIG. 3, each of the twelve reinforcing plates 33 is arranged so as to occupy a circumference of an angle α3 of about 6 degrees in a circle along the rotation direction B in which the reinforcing plate 33 is arranged. ing. That is, each of the twelve reinforcing plates 33 is configured to have a width in the rotation direction B corresponding to an arc of about 6 degrees of an angle α3. As a result, the 12 reinforcing plates 33 occupy an arc corresponding to an angle of about 72 degrees (= 6 × 12), so that the 12 reinforcing plates 33 are about 20 around the entire circumference of the circle along the rotation direction B. % (= (72/360) × 100). Thus, the twelve reinforcing plates 33 are arranged so as to extend in the X direction in a state of covering about 20% of the cylindrical wall portion 34.

  In the first embodiment, as described above, the twelve reinforcing plates 33 are arranged along the circumferential (rotation) direction B with an angle that is twice the angular interval (angle α1) for each magnetic pole of the magnet portions 12 and 22. By arranging them at substantially the same angular intervals every other interval, it is possible to sufficiently suppress the generation of eddy currents, so that it is possible to suppress energy loss when transmitting the driving force. As a result, it is possible to efficiently transmit the driving force from the driving source side rotating body 20 to the load side rotating body 10, and it is also possible to suppress fluctuations in the magnitude of the driving force. Moreover, the whole partition part comprised from the reinforcement part 33 and the wall part 34 can be equally reinforced with the 12 reinforcement boards 33 arrange | positioned at the substantially same angular space | interval. Moreover, since the space | interval of the reinforcement boards 33 can be made close, a partition part can be reinforced more effectively.

  In the first embodiment, as described above, by arranging the twelve reinforcing plates 33 along the rotation direction B, the reinforcing plates 33 are extended so as to extend in the direction intersecting the rotation direction B (X direction). Since it can comprise, the intensity | strength of a partition part can be improved.

  In the first embodiment, as described above, since the wall portion 34 is made of a nonmagnetic resin material, almost no eddy current is generated in the wall portion 34 with high electrical resistance, so that almost no energy loss is generated. The load-side rotator 10 and the drive source-side rotator 20 can be isolated from each other. In addition, since the reinforcing plate 33 is made of nonmagnetic austenitic stainless steel, the partition wall portion including the wall portion 34 made of a resin material having relatively low strength can be reinforced. Further, compared to the case of using ceramics or the like as the reinforcing plate 33, the reinforcing plate 33 can be easily processed so that it can be disposed at a predetermined position of the wall portion 34 by using a metal material as the reinforcing plate 33. .

  Moreover, in 1st Embodiment, the collar part 31 and the cover part 32 which each connect the edge part of the 12 reinforcement plates 33 are provided as mentioned above, and an eddy current flows into a pair of reinforcement plates 33. Even in such a configuration, the twelve reinforcing plates 33 are disposed at positions facing the magnet portions 12 and 22 along the rotation direction B for each magnetic pole of the magnet portions 12 and 22. Arrangement at substantially the same angular interval every two angular intervals of α1) sufficiently suppresses the generation of eddy currents, so that it is possible to suppress energy loss when transmitting the driving force. it can. Further, the partition wall portion can be further reinforced by the twelve reinforcing plates 33, the flange portions 31 that connect the respective end portions of the reinforcing plate 33, and the lid portion 32. Further, the load-side rotating body 10 and the drive source-side rotating body 20 can be isolated from each other by the disc-shaped lid portion 32.

  In the first embodiment, as described above, in the state where the 12 reinforcing plates 33 cover about 20% of the entire circumference of the circle along the rotation direction B in the cylindrical wall portion 34, X By arrange | positioning so that it may extend in a direction, it can suppress that the intensity | strength of a partition part falls because the reinforcement by the reinforcement board 33 is inadequate. Further, even when a change in magnetic flux occurs, the eddy current generated in the reinforcing plate 33 can be reduced, so that energy loss when transmitting the driving force can be suppressed.

  In the first embodiment, as described above, the thickness t2 of the wall 34 is smaller than the thickness t1 of the reinforcing plate 33, thereby increasing the thickness t1 of the reinforcing plate 33 and sufficiently reinforcing the partition wall. However, the total thickness (t1 + t2) of the reinforcing plate 33 and the wall portion 34 can be reduced by reducing the thickness t2 of the wall portion 34.

  In the first embodiment, as described above, the wall portion 34 is formed in a cylindrical shape extending in the X direction, and the twelve reinforcing plates 33 are extended along the X direction on the outer surface of the wall portion 34. By forming the eddy current, the generation of eddy current is sufficiently suppressed, so that energy loss when transmitting the driving force in the cylindrical magnetic coupling device 100 can be suppressed.

  In the first embodiment, as described above, the wheel portion 11 and the magnet portion 12 of the load-side rotator 10 are disposed inside the cylindrical portion 21 of the drive source-side rotator 20, and 12 of the magnet portion 12 is disposed. The 12 N poles 12 a and the 12 S poles 12 b are alternately arranged along the rotation direction B around the rotation axis A, and the 12 N poles 22 a and the 12 S poles 22 b of the magnet portion 22 are arranged. Are alternately arranged along the rotation direction B, in the cylindrical magnetic coupling device 100, a plurality of reinforcing plates 33 extending in the X direction on the outer surface of the cylindrical wall portion 34, and in the X direction. The magnet portions 12 and 22 arranged to extend can be easily arranged at positions facing each other.

  In the first embodiment, as described above, the flange portion 31 and the reinforcing plate 33 are welded to each other on the X1 side of the reinforcing plate 33, and the lid portion 32 and the reinforcing plate 33 are connected to the X2 side of the reinforcing plate 33. Even when the eddy current is configured to flow to the pair of reinforcing plates 33 via the flange portion 31 and the lid portion 32 by welding each other, the 12 reinforcing plates 33 are connected to the magnet portions 12 and Since the eddy currents are sufficiently prevented from being generated by arranging them at an angular interval that is twice the angular interval (angle α1) for each of the 22 magnetic poles, the driving force is transmitted. Energy loss can be suppressed.

  In the first embodiment, as described above, the reinforcing plate 33 is made of a nonmagnetic austenitic stainless steel plate, so that the thickness of the reinforcing plate 33 is larger than that of the reinforcing plate 33 made of a wire. Since the width of the reinforcing plate 33 in the X direction can be increased while decreasing t1, the partition wall portion can be effectively reinforced while suppressing an increase in the thickness t1 of the reinforcing plate 33. In addition, by using austenitic stainless steel as the reinforcing plate 33, it is possible to suppress fluctuations in the transmission torque transmitted from the driving source side rotating body 20 to the load side rotating body 10, and the reinforcing plate 33 is corroded. Can be suppressed.

(Example)
Next, a simulation of the magnetic coupling device 100 performed to confirm the effect of the present invention will be described. Specifically, energy loss simulation and strength simulation were performed for the magnetic coupling device 100 of the example corresponding to the first embodiment and the magnetic coupling devices of Comparative Examples 1 to 4 for the example. .

  Here, it was assumed that the magnetic coupling device 100 of the example had the same configuration as that of the first embodiment shown in FIGS. That is, in the magnet portions 12 and 22, it is assumed that 12 N poles 12a (22a) and 12 S poles 12b (22b) are arranged at the same angular interval every 15 degrees of angle α1. did. In addition, it was assumed that the 12 reinforcing plates 33 of the separating portion 30 are arranged at the same angular intervals every 30 degrees of the angle α2. That is, it was assumed that the twelve reinforcing plates 33 of the separating portion 30 are arranged at the same angular interval every two angular intervals of the angle α1 between the magnetic poles in the magnet portions 12 and 22. Further, each of the twelve reinforcing plates 33 is configured to have a width in the rotational direction B corresponding to an arc of 6 degrees of angle α3, so that the twelve reinforcing plates 33 are aligned along the rotational direction B. It was assumed to cover 20% of the entire circumference of the ellipse.

  Moreover, as shown in FIG. 9, as a magnetic coupling device 200 of Comparative Example 1 with respect to the example, a case where a cylindrical metal member 235 is used instead of the reinforcing plate 33 and the wall portion 34 of the first embodiment is assumed. did. That is, it is assumed that the metal member 235 is arranged on the entire circumference (360 degrees).

  Further, as the magnetic coupling device 300 of the comparative example 2 with respect to the embodiment, as illustrated in FIGS. 10 and 11, it is assumed that the reinforcing plate 333 of the isolation part 330 is arranged for each magnetic pole. Specifically, it is assumed that 24 reinforcing plates 333 are arranged at the same angular intervals every 15 degrees of angle α1. That is, it is assumed that the 24 reinforcing plates 333 of the separating portion 330 are arranged at the same angular interval as the angle α1 between the magnetic poles in the magnet portions 12 and 22. In addition, each of the 24 reinforcing plates 333 is configured to have a width in the rotational direction B corresponding to the arc of 3 degrees α4, so that the 24 reinforcing plates 333 are aligned along the rotational direction B. It was assumed to cover 20% of the entire circumference of the ellipse.

  Moreover, as shown in FIG. 12, as the magnetic coupling device 400 of the comparative example 3 with respect to the embodiment, the 24 reinforcing plates 433 of the separating portion 430 are arranged at the same angular interval every 15 degrees of the angle α1. Assumed. That is, as in Comparative Example 2, it was assumed that the 24 reinforcing plates 433 of the separating portion 430 are arranged at the same angular interval as the angle α1 between the magnetic poles in the magnet portions 12 and 22. Further, each of the 24 reinforcing plates 433 is configured to have a width in the rotational direction B corresponding to an arc of 6 degrees of an angle α3, so that the 24 reinforcing plates 433 are aligned along the rotational direction B. It was assumed to cover 40% of the entire circumference of the ellipse.

  Moreover, as a magnetic coupling device of the comparative example 4 with respect to the embodiment, the magnetic coupling device 100 of the embodiment in which the reinforcing plate is disposed so as to extend along the rotation axis A (axial direction), and the magnetic coupling device 100 of the comparative examples 2 and 3 ( 300 and 400), a comparative example 4 was assumed in which the reinforcing plate was formed so as to be orthogonal to the rotation axis A (see FIG. 4). That is, it is assumed that each of the twelve reinforcing plates is formed in an annular shape that is centered on the rotation axis A and orthogonal to the rotation axis A, and is arranged at a predetermined interval in the X direction. did.

  In addition, it assumed that the reinforcement board of an Example and Comparative Examples 2-4 and the metal member 235 of Comparative Example 1 consist of SUS304 which is both austenitic stainless steel.

(Simulation of energy loss)
And in the magnetic coupling apparatus of an Example and the magnetic coupling apparatus of Comparative Examples 1-4, the energy loss in a magnetic coupling apparatus is calculated | required by simulating the generation | occurrence | production state of the eddy current in a reinforcement board or a metal member. It was.

  As a result of the energy loss simulation, when the energy loss in the magnetic coupling device 200 of Comparative Example 1 is set to 100, the energy loss in the magnetic coupling device 100 of the example is 3. Further, the energy loss in the magnetic coupling device 300 of Comparative Example 2 was 17, and the energy loss in the magnetic coupling device 400 of Comparative Example 3 was 33. Moreover, the energy loss in the magnetic coupling apparatus of the comparative example 4 was 3, and was the same energy loss as an Example. From this result, like the magnetic coupling device 100 of the embodiment, the twelve reinforcing plates 33 of the separating portion 30 are arranged at the same angular interval every two angular intervals of the angle α1 between the magnetic poles in the magnet portions 12 and 22. As compared with the magnetic coupling device 200 of Comparative Example 1, it was possible to obtain a result that energy loss can be drastically reduced. On the other hand, like the magnetic coupling device 300 of the comparative example 2 and the magnetic coupling device 400 of the comparative example 3, the 24 reinforcing plates 333 (433) of the isolation part 330 (430) are connected to the magnetic poles in the magnet parts 12 and 22. When arranged at the same angular interval as the angle α1, the energy loss was reduced as compared with the magnetic coupling device 200 of Comparative Example 1, but the energy loss could not be reduced as much as the example.

  The following points are considered from the result of the simulation of the energy loss. In the magnetic coupling device 100 of the embodiment, as shown in FIGS. 3 and 6 to 8, the total amount of magnetic flux passing through the region C (regardless of the rotation of the load side rotating body 10 and the driving source side rotating body 20 ( Since the vector amount) did not change much, it is considered that the generation of eddy current in the reinforcing plate 33 could be sufficiently suppressed. On the other hand, in the magnetic coupling device 300 of Comparative Example 2, in the initial state shown in FIGS. 10 and 11, the region D sandwiched between a certain reinforcing plate 333 and the adjacent reinforcing plate 333 faces the S pole 22b. A region is formed. At this time, the region facing the south pole 22b has a length L1 in the rotation direction B. On the other hand, in the region D, a region facing the N pole 22a of the magnet portion 22 is not formed. That is, the magnetic flux passing through the region D is a magnetic flux toward the S pole 22b. Then, from the initial state shown in FIGS. 10 and 11, as shown in FIGS. 13 and 14, the load side rotating body 10 (see FIG. 1) and the drive source side rotating body 20 (see FIG. 1) are equivalent to one magnetic pole (about When rotated by 15 degrees, a region facing the north pole 22a of the magnet portion 22 is formed in the region D as shown in FIG. On the other hand, in the region D, a region facing the S pole 22b is not formed. That is, the magnetic flux passing through the region D is a magnetic flux generated from the N pole 22a. As a result, due to the rotation of the load-side rotator 10 and the drive source-side rotator 20, the magnetic flux passing through the region D has changed significantly from the magnetic flux toward the S pole 22b to the magnetic flux emitted from the N pole 22a. It is presumed that eddy current is generated in the reinforcing plate 333 due to electromagnetic induction due to electromagnetic induction. On the other hand, since the comparative example 4 was different only in the direction of the reinforcing plate 33, it is presumed that it was not significantly different from the example in terms of energy loss.

  In addition, compared with the magnetic coupling apparatus 200 of the comparative example 1, the energy loss of the magnetic coupling apparatus 300 of the comparative example 2 and the magnetic coupling apparatus 400 of the comparative example 3 decreased. This is because, in the magnetic coupling device 200 of the comparative example 1, the eddy current is generated in the entire metal member 235, whereas in the magnetic coupling device 300 of the comparative example 2 and the magnetic coupling device 400 of the comparative example 3, the eddy current is generated. Is generated in the metal reinforcing plate 333 (433) disposed only in a part of the wall portion 34, it is considered that the eddy current generated in Comparative Example 2 and Comparative Example 3 could be reduced. It is done. In this respect, the comparative example 2 in which the 24 reinforcing plates 333 cover 20% is generated more than the comparative example 3 in which the 24 reinforcing plates 433 cover a larger area (about 40%) than the comparative example 2. This is also apparent from the fact that the current can be reduced and the energy loss can be reduced.

(Strength simulation)
Moreover, about an Example and Comparative Examples 1-4, it sets about the intensity | strength of a partition part by setting so that the breaking pressure 3 times the pressure made into the working pressure of a magnetic coupling apparatus may be applied as an internal pressure to the load side rotary body side. Simulation (safety evaluation) was performed.

  As a result of the simulation of strength, when the breaking pressure of the example was set to 100, the breaking pressures of Comparative Examples 1 to 3 were 100. That is, it is estimated that the partition part of an Example and Comparative Examples 1-3 has the intensity | strength which can be endured even if it is a destructive pressure 3 times the pressure. On the other hand, the breaking pressure of Comparative Example 4 was 60. That is, since the partition wall portion of Comparative Example 4 has only 60% strength compared to the partition wall portions of Examples and Comparative Examples 1 to 3, it is estimated that the strength is insufficient. As a result, by arranging twelve reinforcing plates 33 along the rotation direction B as in the example, the reinforcing plate is arranged in the partition wall portion more than in the comparative example 4 arranged orthogonal to the rotation direction B. It is considered possible to improve the strength.

(First modification of the first embodiment)
Next, a first modification of the first embodiment of the present invention will be described with reference to FIGS. 1 and 15. In the magnetic coupling device 500 according to the first modification of the first embodiment, unlike the first embodiment, the plurality of reinforcing plates 533 of the isolation part 530 are inclined with respect to the extending direction of the magnet part 22. The case will be described. The reinforcing plate 533 is an example of the “reinforcing portion” in the present invention.

  In the magnetic coupling device 500 according to the first modification of the first embodiment of the present invention, as shown in FIG. 15, each of the reinforcing plates 533 of the isolation part 530 is inclined at a predetermined angle with respect to the X direction. It is formed to extend. That is, each of the reinforcing plates 533 is formed so as to extend in a direction inclined with respect to the magnet portion 22 formed so that the magnetic poles extend in the X direction. Here, in the region E sandwiched between a certain reinforcing plate 533 and the adjacent reinforcing plate 533, the region facing the N pole 22a and the region facing the S pole 22b are configured to have substantially the same area. . As a result, the total amount (vector amount) of the magnetic flux passing through the region E is substantially the same as the magnetic flux emitted from the N pole 22a and the magnetic flux directed to the S pole 22b. Regardless of the move to, it does not change much.

  Here, when the portion where the N pole 22 a and the S pole 22 b are switched passes through the reinforcing plate 533, a change in magnetic flux occurs, and some eddy current is generated in the reinforcing plate 533. However, when the reinforcing plate 533 extends in a direction inclined at a predetermined angle with respect to the X direction, only a part of the reinforcing plate 533 is configured to face a portion where the N pole 22a and the S pole 22b are switched, and the magnet The same effect as that obtained when the portions 12 and 22 are arranged with an inclination (skew) can be obtained. This makes it possible to configure the eddy current to be generated only in a part of the reinforcing plate 533, so that the change in the magnetic flux becomes gradual compared to the case where the reinforcing plate 533 is formed to extend in the X direction. Energy loss can be further suppressed. As a result, the change of the magnetic flux becomes smooth and the driving force can be transmitted efficiently, and the fluctuation of the driving force can be suppressed.

  Further, the magnet portions 12 and 22 instead of the reinforcing plate 533 of the isolation portion 530 may be formed to extend in a direction inclined at a predetermined angle with respect to the X direction. That is, each of the magnet parts 12 and 22 may be formed to extend in a direction inclined with respect to the reinforcing plate 533 formed to extend in the X direction. More preferably, both the reinforcing plate 533 and the magnet portions 12 and 22 are formed to extend in a direction inclined at a predetermined angle with respect to the X direction. The remaining configuration of the first modification example of the first embodiment is similar to that of the first embodiment.

  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. In the magnetic coupling device 600 according to the second embodiment, a case will be described in which each of the reinforcing portions 633 of the separating portion 630 is made of a plurality of metal wires 636, unlike the first embodiment. The reinforcing portion 633 is an example of the “partition wall” in the present invention.

  In the magnetic coupling device 600 according to the second embodiment of the present invention, as shown in FIG. 16, the isolation part 630 has a plurality of wires 636. The wires 636 are arranged close to each other along the rotation direction B every five wires, and the reinforcing members 633 are configured by grouping the five wires 636 into a group. And the reinforcement part 633 comprised from the five wire 636 is arrange | positioned at the substantially same angular space | interval every other angle (alpha) 2 of about 30 degree | times. In other words, the reinforcing portions 633 are arranged at substantially the same angular intervals at an angular interval that is twice the angular interval (angle α1) for each magnetic pole of the magnet portions 12 and 22. The remaining configuration of the second embodiment is the same as that of the first embodiment.

  In the second embodiment, as described above, the reinforcing portions 633 including the five wires 636 as a group are approximately arranged at intervals of twice the angular interval (angle α1) for each magnetic pole of the magnet portions 12 and 22. By arranging them at the same angular interval, the generation of eddy currents is sufficiently suppressed, so that energy loss when transmitting the driving force can be suppressed. In addition, the plurality of wire rods 636 can be easily arranged along the rotation direction B at intervals of twice the angular interval for each magnetic pole of the magnet portions 12 and 22.

  Moreover, in 2nd Embodiment, the strength of each reinforcement part 633 can be easily improved by using the five wire 636 as one reinforcement part 633 as mentioned above. Further, by arranging the five wires 636 along the rotation direction B, the strength of the reinforcement 633 can be improved without increasing the radial thickness of the reinforcement 633 made of the five wires 636. it can. 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 FIGS. In the magnetic coupling device 700 according to the third embodiment, a case where the load side rotating body 710 and the drive source side rotating body 720 face each other in the direction in which the rotation axis A extends will be described, unlike the first embodiment. The load side rotator 710 and the drive source side rotator 720 are examples of the “second rotator” and the “first rotator” of the present invention, respectively.

  In the disc-shaped magnetic coupling device 700 according to the third embodiment of the present invention, as shown in FIG. 17, the load-side rotating body 710 of the load-side portion 701 includes a disc portion 711 and a magnet portion 712 and is driven. The drive source side rotating body 720 of the source side part 702 includes a disk part 721 and a magnet part 722. The disk parts 711 and 721 are both made of a member containing a ferromagnetic material such as general carbon steel such as SS400, and have a function as a yoke.

  The disk portions 711 and 721 are both formed in a disk shape centered on the rotation axis A. Magnet portions 712 and 722 are disposed on the surface on the X2 side of the disk portion 711 and the surface on the X1 side of the disk portion 721, respectively, and are configured to face each other. Further, shaft portions 1a and 2a are connected to the surface on the X1 side of the disk portion 711 and the surface on the X2 side of the disk portion 721, respectively.

  As shown in FIG. 18, in the magnet portion 712, six N poles 712 a and six S poles 712 b having substantially the same shape are arranged in a circumferential (rotation) direction B around the rotation axis A. Are arranged alternately. Further, in the magnet part 722, similar to the magnet part 712, six N poles 722 a and six S poles 722 b having substantially the same shape are alternately arranged along the rotation direction B around the rotation axis A. Is arranged. That is, the magnet portions 712 and 722 both have twelve magnetic poles, and the magnetic poles are formed at substantially the same angular intervals every angle α5 of about 30 degrees.

  Moreover, as shown in FIG. 17, the magnet part 712 and the magnet part 722 are comprised so that a magnetic coupling may mutually be performed when a mutual magnetic pole opposes. As a result, the driving force around the rotation axis A of the drive source side rotator 720 is transmitted as the driving force around the rotation axis A of the load side rotator 710.

  The isolation member 703 of the magnetic coupling device 700 includes a frame portion 703a and an isolation portion 730 that is fixed to the frame portion 703a from the X1 side by screws 4. In the frame portion 703a, screw holes 703b are provided at positions corresponding to screw holes 733e of a reinforcing member 733, which will be described later, and screw holes 734a of a wall portion 734. Further, the isolation part 730 is sandwiched between the load side rotating body 710 and the driving source side rotating body 720 in the X direction in a non-contact state with the load side rotating body 710 and the driving source side rotating body 720. Has been placed.

  Moreover, the isolation | separation part 730 has the reinforcement member 733 which consists of nonmagnetic austenitic stainless steel, and the wall part 734 which consists of a nonmagnetic resin material. As shown in FIGS. 19 and 20, the reinforcing member 733 and the wall portion 734 are both formed in a disc shape with the rotation axis A as the center. Further, as shown in FIG. 17, the reinforcing member 733 and the wall portion 734 have substantially the same size in a plane orthogonal to the rotation axis A. The wall portion 734 is an example of the “partition wall” in the present invention.

  As shown in FIG. 19, the disk-shaped reinforcing member 733 includes an annular portion 733a centered on the rotational axis A and an inner portion 733b centered on the rotational axis A and disposed inside the annular portion 733a. And six connecting portions 733c extending in the radial direction so as to connect the annular portion 733a and the inner portion 733b. Thus, six fan-shaped hole portions 733d are formed between the annular portion 733a and the inner portion 733b. Further, the annular portion 733a is provided with a plurality of screw holes 733e at a predetermined distance along the rotation direction B. The connecting portion 733c is an example of the “reinforcing portion” in the present invention.

  Here, in the third embodiment, each of the six connection portions 733c is arranged at substantially the same angular interval every other angle α6 of about 60 degrees along the rotation direction B. That is, the six connection portions 733c are arranged at substantially the same angular intervals at intervals of twice the angular interval (angle α5) for each magnetic pole of the magnet portions 712 and 722. As a result, the total amount of magnetic flux (vector amount) passing through each of the six holes 733d is not so great regardless of the rotation of the load side rotator 710 and the drive source side rotator 720 around the rotation axis A (see FIG. 17). It is configured not to change.

  Further, as shown in FIG. 20, the disk-shaped wall portion 734 is provided with a plurality of screw holes 734 a at a predetermined distance along the rotation direction B. Thus, as shown in FIG. 17, the disk-shaped reinforcing member 733 and the wall portion 734 are fixed to the frame portion 703a by the screws 4. As a result, the wall portion 734 is positioned at a position corresponding to the six fan-shaped hole portions 733d of the reinforcing member 733, so that the wall portion 734 covers each of the hole portions 733d positioned between the reinforcing members 733. Has been placed. Other configurations of the third embodiment are the same as those of the first embodiment.

  In the third embodiment, as described above, the six N poles 712a and the six S poles 712b of the magnet portion 712 are alternately arranged along the circumferential (rotation) direction B around the rotation axis A. The six N poles 722a and the six S poles 722b of the magnet portion 722 are alternately arranged along the rotation direction B. Further, eddy currents are generated by arranging the six connecting portions 733c at an angular interval that is twice the angular interval (angle α5) for each magnetic pole of the magnet portions 712 and 722 at substantially the same angular interval. Is sufficiently suppressed, and in the disk-shaped magnetic coupling device 700, it is possible to suppress energy loss when transmitting the driving force. The remaining effects of the third embodiment are similar to those of the first 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 said 1st-3rd embodiment, although the example arrange | positioned so that the magnet part 12 (712) and the magnet part 22 (722) might oppose was shown, it is 2nd of 1st Embodiment shown in FIG. A yoke 811 made of a magnetic material may be disposed on the load-side rotating body 810 instead of the wheel unit 11 and the magnet unit 12 of the first embodiment, as in the magnetic coupling device 800 of the modified example. The load side rotating body 810 is an example of the “second rotating body” in the present invention.

  Further, in the first and second embodiments, the reinforcing plate 33 (reinforcing plate 533, reinforcing portion 633) is arranged at angular intervals that are twice the angular interval (angle α1) for each magnetic pole of the magnet portions 12 and 22. In the third embodiment, the connecting portions 733c are arranged at substantially the same angle every two angular intervals (angle α5) for each magnetic pole of the magnet portions 712 and 722 in the third embodiment. Although the example arrange | positioned by the space | interval was shown, this invention is not limited to this. In the present invention, the reinforcing portions may be arranged at substantially the same angular intervals at even angular intervals that are an even multiple of four times or more the angular interval for each magnetic pole of the magnet portion. Further, the angular intervals between the reinforcing portions may be made different by removing arbitrary reinforcing portions from the state in which the reinforcing portions are arranged at an angular interval that is twice the angular interval for each magnetic pole of the magnet portion. Also by this, the angular interval between the reinforcing portions becomes an angular interval that is an even multiple of the angular interval for each magnetic pole of the magnet portion. As a result, the number of reinforcing parts can be reduced compared to the case where reinforcing parts are arranged at an angular interval twice as large as the angular interval for each magnetic pole of the magnet part, thereby further suppressing the generation of eddy currents. It becomes possible to do. As a result, it is possible to further suppress energy loss when transmitting the driving force.

  In the first embodiment, the 12 reinforcing plates 33 extend in the X direction in a state where the cylindrical wall portion 34 covers about 20% of the entire circumference of the circle along the rotation direction B. However, the present invention is not limited to this. In the present invention, the reinforcing plate 33 is disposed so as to extend in the X direction in a state of covering a region larger than about 20% or a region smaller than about 20% of the entire circumference of the circle along the rotation direction B. Also good. At this time, it is preferable to arrange the reinforcing plate 33 so as to extend in the X direction so as to cover about 3% or more and less than about 20% of the entire circumference of the circle along the rotation direction B.

  In the first embodiment, the example in which the thickness t1 of the reinforcing plate 33 is about 5 mm and the thickness t2 of the wall portion 34 is about 1 mm is shown, but the present invention is not limited to this. . In the present invention, the thickness t1 of the reinforcing plate 33 and the thickness t2 of the wall portion 34 are not particularly limited. The thickness t2 of the wall 34 is preferably smaller than the thickness t1 of the reinforcing plate 33. Specifically, the thickness t1 of the reinforcing plate 33 is preferably about 4 mm or more and about 5 mm or less, and the thickness t2 of the wall portion 34 is preferably about 1 mm or more and about 2 mm or less.

  Moreover, in the said 2nd Embodiment, the example which has arrange | positioned every five wire rods 636 at the substantially same angle interval for every 2 time angle intervals (angle (alpha) 1) for every magnetic pole of the magnet parts 12 and 22. However, the present invention is not limited to this. In the present invention, one or more wire rods 636 may be arranged at substantially the same angular interval at an angular interval twice as large as the angular interval (angle α1) for each magnetic pole of magnet portions 12 and 22. The number is not particularly limited. Note that the degree of reinforcement of the partition walls can be easily changed by changing the number of the wires 636.

  Moreover, in the said 2nd Embodiment, although the example which has arrange | positioned the wire 636 close to every 5 pieces along the rotation direction B was shown, this invention is not limited to this. In the present invention, a plurality of wires 636 may be arranged so as to be aligned along a radial direction orthogonal to the rotation direction B.

  Moreover, in the said 1st Embodiment, although the example which has arrange | positioned the reinforcement board 33 so that it may extend along the X direction where a cylinder extends on the outer surface of the wall part 34 was shown, this invention is not limited to this. In the present invention, the reinforcing plate 33 may be arranged so as to extend along the X direction in which the cylinder extends on the inner surface of the wall portion 34. In this case, the space on the drive source side portion 2 side is preferably lower in atmospheric pressure (internal pressure) than the space on the load side portion 1 side, because the wall portion 34 can be pressed against the reinforcing plate 33.

  Moreover, in the said 1st and 2nd embodiment, the magnet parts 12 and 22 show the example which has 24 magnetic poles, and in the said 3rd Embodiment, the magnet parts 712 and 722 both have 12 magnetic poles. Although the example which has is shown, this invention is not limited to this. In the present invention, the magnetic poles of the magnet portion are not limited to 24 or 12 magnetic poles, but may be even numbers.

  In the first and second embodiments, the example in which only the reinforcing plate 33 (533) and the wire 636 extending along the rotation axis A are provided as the reinforcement of the wall 34 is shown, but the present invention is not limited to this. I can't. In the present invention, when the reinforcing plate 33 (533) and the wire 636 are long in the X direction, in addition to the reinforcing plate 33 (533) and the wire 636, an annular reinforcing ring orthogonal to the rotation axis A is further provided. By arrange | positioning so that the reinforcement board 33 (533) and the wire 636 may be enclosed, you may improve the intensity | strength of the wall part 34 more.

  In the first to third embodiments, the reinforcing plate 33 (533), the wire 636, and the reinforcing member 733 are all made of austenitic stainless steel. However, the present invention is not limited to this. For example, you may comprise a reinforcement part so that it may consist of hastelloy.

  In the first and second embodiments, the reinforcing plate 33 (533) and the wire 636 are formed so as to extend in the X direction along the rotation axis A. However, the present invention is not limited to this. Absent. In the present invention, the reinforcing portion may be formed to extend in a direction inclined with respect to the rotation axis A.

10, 710, 810 Load side rotating body (second rotating body)
12, 712 Magnet part (second magnet part)
20, 720 Drive source side rotating body (first rotating body)
22, 722 Magnet part (first magnet part)
31 buttock (connecting part)
32 Lid (connecting part)
33, 533 Reinforcement plate (partition wall, reinforcement)
34, 734 Wall (partition wall)
100, 500, 600, 700, 800 Magnetic coupling device 633 Reinforcement part (partition wall part)
636 Wire 733c Connection part (partition wall part, reinforcement part)
811 York

Claims (16)

A first rotating body including first magnet portions in which different magnetic poles are alternately arranged along the rotation direction;
A second rotating body including any one of a second magnet section and a yoke that are magnetically coupled to the first magnet section, and arranged to be relatively rotatable in a non-contact state with respect to the first rotating body; ,
A partition portion disposed between the first rotating body and the second rotating body and at a position facing the first magnet portion, and separating the first rotating body from the second rotating body; Prepared,
The partition wall includes a wall portion made of a nonmagnetic resin material, and a plurality of reinforcing portions made of a nonmagnetic metal material, each disposed at every even number of magnetic poles of the first magnet portion along the rotation direction. Including a magnetic coupling device.   2. The magnetic coupling device according to claim 1, wherein the plurality of reinforcing portions are arranged at substantially the same intervals every even number of magnetic poles of the first magnet portion along the rotation direction. In the first magnet portion, different magnetic poles are alternately arranged at predetermined angular intervals along the rotation direction,
3. The magnetism according to claim 2, wherein the plurality of reinforcing portions are arranged at substantially the same angular intervals every even multiple of the predetermined angular interval in the magnetic pole of the first magnet portion along the rotation direction. Coupling device.   4. The magnetism according to claim 3, wherein the plurality of reinforcing portions are arranged at substantially the same angular interval at intervals of twice the predetermined angular interval in the magnetic pole of the first magnet portion along the rotation direction. Coupling device.   The magnetic coupling device according to claim 1, further comprising a connecting portion that connects each end portion of the plurality of reinforcing portions.   The plurality of reinforcing portions extend in a direction intersecting the rotation direction so as to cover a portion of 3% to 20% of the entire circumference of the circle along the rotation direction. The magnetic coupling device according to claim 1.   The magnetic coupling device according to claim 1, wherein a thickness of the wall portion is smaller than a thickness of each of the plurality of reinforcing portions. The wall portion of the partition wall is formed in a cylindrical shape along the rotation direction,
The magnetic cup according to any one of claims 1 to 7, wherein the plurality of reinforcing portions are formed so as to extend along a direction in which the cylinder extends on an inner surface or an outer surface of the cylindrical wall portion. Ring device. One of the first rotating body and the second rotating body is formed in a cylindrical shape, and the other one of the first rotating body and the second rotating body is the cylindrical first rotation. The cylindrical rotating partition is disposed inside either the first rotating body or the second rotating body so as to sandwich the cylindrical partition wall between the body and the second rotating body,
The different magnetic poles of the first magnet part extend along the extending direction of the cylinder on the side surface facing the second rotating body, and are alternately arranged along the rotating direction. Magnetic coupling device.   10. The magnetic coupling device according to claim 8, further comprising a disk-shaped lid portion that is disposed at an end portion of the cylindrical wall portion and separates the first rotating body and the second rotating body.   The said cover part is a connection part which connects each edge part of these reinforcement parts by welding the edge part of each of these reinforcement parts while being made of a metal material. The magnetic coupling device described.   12. The magnetic coupling device according to claim 1, wherein each of the plurality of reinforcing portions is made of a metal plate material.   12. The magnetic coupling device according to claim 1, wherein each of the plurality of reinforcing portions is made of a metal wire.   14. The magnetic coupling device according to claim 13, wherein each of the plurality of reinforcing portions includes a plurality of the metal wires. The first rotating body and the second rotating body are formed in a disc shape so as to face each other,
The different magnetic poles of the first magnet portion are alternately arranged along the rotation direction on the surface facing the second rotating body,
The plurality of reinforcing portions are formed to extend in the radial direction from the center of a circle along the rotation direction, and the wall portion is formed to cover at least the space between the plurality of reinforcing portions. The magnetic coupling device according to any one of claims 1 to 7.   The magnetic coupling device according to claim 1, wherein the reinforcing portion is made of nonmagnetic stainless steel.

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