JP2011094742A - Magnetic multi-stage transmission mechanism and compound magnetic multi-stage transmission mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve a magnetic multi-stage transmission mechanism capable of simplifying a structure and carrying out loss reduction. <P>SOLUTION: The magnetic multi-stage transmission mechanism includes a plurality of inner side rotors 24, 26, 28 provided on an input side member 12 and including a plurality of inner side permanent magnets 58, 60, 62 provided such that N-poles and S-poles are alternately disposed in a circumferential direction, a plurality of outer side rotors 34, 36, 38 provided on an output side member 14 and including a plurality of outer side permanent magnets provided such that N-poles and S-poles are alternately disposed in a circumferential direction, and an unrotatable stator 16 including a magnetic characteristic change part 44 disposed with column parts 46 made of a magnetic material in plural circumferential portions. A transmission part of 1 is composed by a portion having the magnetic characteristic change part 44 face the inner side rotor of 1 and the outer side rotor of 1. By movement of the stator 16 in an axial direction, a change-over can be carried out to another transmission part having a gear ratio different from the transmission part of 1. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention includes a first rotating element and a second rotating element that are rotatably arranged, an inner rotor that is provided on the first rotating element and includes an inner permanent magnet, and an outer that is provided on the second rotating element and includes an outer permanent magnet. The present invention relates to a magnetic multi-stage transmission mechanism and a composite magnetic multi-stage transmission mechanism that include a rotor and a stator including a magnetic characteristic changing portion that is disposed between the inner and outer rotors so as not to rotate in the radial direction.

2. Description of the Related Art Conventionally, as a multi-stage transmission mechanism, a mechanical multi-stage transmission mechanism is known that includes a plurality of gear sets in which a pair of gears having different numbers of teeth are engaged with each other. In the case of such a mechanical multi-stage speed change mechanism, when changing the speed stage, it is necessary to disconnect the coupling between the gears with one meshing gear set and to mesh the gears constituting another gear set. A tuning mechanism is used for this purpose. For example, in a manual transmission device for an automobile, a synchromesh mechanism is employed to precisely align the spline portion of the sleeve engaged with the rotating shaft and the spline portion provided on the gear while synchronizing the speed. It is possible to synchronize.
In addition, there exists a nonpatent literature 1 as a prior art document relevant to this invention.

K. Atallah and two others, “Design, analysis and realization of a high-performance magnetic gear”, IEEE Proc.-Electr. Power Appl., Vol.151, No.2, March 2004, p.135-143

  In the case of a mechanical multi-stage transmission mechanism that has been conventionally considered as described above, a tuning mechanism is required to accurately synchronize the position of the gear that mechanically meshes the gears. The entire system becomes larger. In addition, the need for a tuning mechanism can increase mechanical losses.

On the other hand, as described in Non-Patent Document 1, there is known a magnetic gear including an inner rotor, an outer rotor opposed to the radially outer side of the inner rotor, and a stator disposed between the inner and outer rotors. It has been. Each rotor and the stator are arranged on the same axis. Each of the inner and outer rotors includes a plurality of permanent magnets, and the stator includes a plurality of ferromagnetic columns. The outer rotor, the stator, and the inner rotor are arranged coaxially. In this case, among the inner and outer rotors, when the number of pole pairs of the permanent magnet of one rotor is P1, the number of pole pairs of the permanent magnet of the other rotor is P2, and the number of stator pillars is Ns, The number Ns of stator pillars is defined as expressed by the following equation.
Ns = P1 ± P2 (1)

In this case, if the stator is stationary, for example, the reduction ratio Gr is expressed by the following equation.
Gr = P2 / P1 (1)

  In this case, for example, the pole pair number P2 of the other rotor is set to P2 = Ns−P1, the pole pair number P1 of the outer rotor is set to 22, the number Ns of column portions of the stator is set to 26, and the pole pair number P2 of the inner rotor is set to 4. Then, Gr = 1 / 5.5, and the rotational speed input to the inner rotor is reduced to 1 / 5.5 times.

  However, such a magnetic gear described in Non-Patent Document 1 can only obtain a reduction ratio of one step. For example, in the application of a transmission used for an automobile, a two-wheeled vehicle, etc., the speed inputted to the input shaft Cannot be used when you want to output in multiple stages. In view of such circumstances, the present inventors invented a multi-stage transmission mechanism capable of simplifying the structure and reducing loss by eliminating the tuning mechanism used in the mechanical multi-stage transmission mechanism. It came. The inventors have also invented a composite magnetic multi-stage transmission mechanism including a plurality of multi-stage transmission mechanisms.

  An object of the present invention is to realize a multi-stage transmission mechanism and a composite magnetic multi-stage transmission mechanism that can simplify the structure and reduce loss.

  A magnetic multi-stage transmission mechanism according to the present invention includes a first rotating element and a second rotating element that are arranged so as to be rotatable coaxially with each other, and an inner rotor provided in the first rotating element, and has N poles on the outer circumferential surface. And an inner rotor including a plurality of inner permanent magnets provided so as to be alternately arranged in the circumferential direction, and an outer rotor provided in the second rotating element, and an N pole on the inner circumferential surface. Between the outer rotor including a plurality of outer permanent magnets provided so that the S poles are alternately arranged in the circumferential direction, and between the inner and outer rotors, they are arranged in a radially unrotatable manner. And a stator including a magnetic property changing portion in which a magnetic material column portion is disposed, and the first and second rotations are performed by a portion in which the magnetic property changing portion is radially opposed to the inner rotor and the outer rotor. Constructs a transmission that allows transmission of power while shifting between elements , The shifting portion is a magnetic multi-speed mechanism, characterized in that to enable switching to another transmission portion having a different gear ratio.

  In the magnetic multi-stage speed change mechanism according to the present invention, preferably, one or two of the first rotating element, the second rotating element, and the stator are magnetically separated from each other by a plurality of inner rotors and outer rotors separated in the axial direction. Including at least one of the characteristic change portions, the number of pole portions provided in at least one magnetic characteristic change portion is Ns, the number of pole pairs of magnetic poles provided in at least one inner rotor is Pi, and at least one When the number of pole pairs of the magnetic poles provided on the outer rotor is Po, Ns = Po + Pi or Ns = Po−Pi is established in each switchable transmission, and the first rotating element, the second rotating element, the stator, By shifting at least one of these in the axial direction, the gear ratio between the first and second rotating elements can be switched.

  In the magnetic multi-stage transmission mechanism according to the present invention, preferably, the first rotating element includes a plurality of inner rotors separated in the axial direction, and each inner rotor has a different number of inner permanent magnets in the circumferential direction. The second rotating element includes a plurality of axially separated outer rotors, and each outer rotor is disposed such that a different number of outer permanent magnets are aligned in the circumferential direction. The stator includes magnetic property changing portions formed by magnetic material column portions arranged at a plurality of circumferential positions at the same axial position, the number of the column portions is Ns, and the magnetic poles provided on at least one inner rotor If the number of pole pairs is Pi and the number of pole pairs of the magnetic poles provided on at least one outer rotor is Po, Ns = Po + Pi or Ns = Po-Pi is established in each switchable transmission, and the stator is To a state where the magnetic characteristic changing part is opposed to one inner rotor and the outer rotor in the radial direction, and a state where the magnetic characteristic changing part is opposed to another inner rotor and the outer rotor in the radial direction. Thus, the speed ratio between the first and second rotating elements can be switched.

  In the magnetic multi-stage transmission mechanism according to the present invention, preferably, one of the first rotating element and the second rotating element and the stator can be moved in the axial direction, and the stator is separated in the axial direction. In addition, each magnetic characteristic change part is arranged so that different numbers of magnetic material column parts are arranged in the circumferential direction, and one rotating element is separated in the axial direction. A plurality of inner rotors or outer rotors, each inner rotor or each outer rotor being arranged such that a different number of inner permanent magnets or outer permanent magnets are arranged in the circumferential direction, and the number of pillars is Ns, When the number of pole pairs of the magnetic poles provided in at least one inner rotor is Pi and the number of pole pairs of the magnetic poles provided in at least one outer rotor is Po, Ns = Po Pi or Ns = Po-Pi is established.

  In the magnetic multi-stage transmission mechanism according to the present invention, preferably, in the magnetic multi-stage transmission mechanism according to the present invention, the first rotating element is an input side member to which power is input, and the second rotating element is It is an output side member from which power is output.

  In the magnetic multi-stage transmission mechanism according to the present invention, preferably, the output side member is provided with an outer rotor on the same side as the side where the inner side rotor of the input side member is provided.

  In the magnetic multi-stage transmission mechanism according to the present invention, preferably, the output side member is provided with an outer rotor on the side opposite to the side where the input side member is provided with respect to the axial direction.

  Further, the composite magnetic multi-stage transmission mechanism according to the present invention is a composite magnetic multi-stage transmission mechanism configured by operatively connecting a plurality of magnetic multi-stage transmission mechanisms, each of which is a magnetic multi-stage transmission mechanism according to the present invention. An output side member constituting at least one magnetic multi-stage transmission mechanism is operatively connected to an input side member constituting another magnetic multi-stage transmission mechanism via a power transmission unit or directly. In each of the magnetic multi-stage speed change mechanisms, the gear ratio between the input side member and the output side member can be switched.

  According to the magnetic multi-stage transmission mechanism according to the present invention, a multi-stage transmission mechanism can be realized, and the tuning mechanism used in the mechanical multi-stage transmission mechanism can be eliminated, thereby simplifying the structure and reducing the size. I can plan. In addition, the tuning mechanism can be eliminated, and mechanical engagement at the transmission unit can be eliminated, so that mechanical loss can be reduced. In addition, according to the composite magnetic multi-stage transmission mechanism according to the present invention, a mechanical loss can be reduced, and a transmission mechanism having a larger number of stages can be realized with a simple structure.

1 is a schematic cross-sectional view of a magnetic multi-stage transmission mechanism according to a first embodiment of the present invention. It is expansion AA schematic sectional drawing of FIG. It is a schematic sectional drawing which shows two other examples of the linear actuator which comprises the magnetic multistage transmission mechanism of FIG. In the magnetic multi-stage transmission mechanism of FIG. 1, a schematic perspective view in which the outer rotor and the inner rotor constituting the first, second, and third transmission units and the stator column are arranged in a partially separated state. It is. In the magnetic multi-stage transmission mechanism of FIG. 1, a schematic cross section of the magnetic multi-stage transmission mechanism and a cross section cut in a direction orthogonal to the central axis at α, β, and γ portions, showing how the gear stage is changed to three stages. FIG. It is a figure corresponding to FIG. 4 of the magnetic multi-stage transmission mechanism of 2nd Embodiment which concerns on this invention. It is a schematic diagram which shows an example of the composite magnetic multistage transmission mechanism comprised by the magnetic multistage transmission mechanism of FIG. It is a schematic sectional drawing of the magnetic multistage transmission mechanism of 3rd Embodiment concerning this invention. It is a schematic diagram which shows another example of the composite magnetic multistage transmission mechanism comprised by the magnetic multistage transmission mechanism of FIG. It is a schematic sectional drawing of the magnetic multi-stage transmission mechanism of 4th Embodiment concerning this invention.

[First Embodiment]
Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. 1 to 5 show a first embodiment of the present invention.

  As shown in FIGS. 1 and 2, the magnetic multi-speed transmission mechanism 10 of the present embodiment is a first rotating element, which is an input side member 12 to which power is input, and a second rotating element, and the power is An output side member 14 that is output, a stator 16, and an actuator 18 are provided. The input side member 12 includes a shaft portion 20 and a flange portion 22 provided at one end portion (the right end portion in FIG. 1) of the shaft portion 20, and rotates via a bearing or the like inside a housing (not shown) which is a fixed portion. Place and support as possible. Further, the first inner rotor 24, the second inner rotor 26, and the third inner side are coaxially arranged with respect to the shaft portion 20 on the outer peripheral surface ranging from the other end portion (left end portion in FIG. 1) to the intermediate portion of the shaft portion 20. The rotor 28 is fitted and fixed. An axial space is provided between the inner rotors 24, 26, 28. That is, each inner rotor 24, 26, 28 is separated in the axial direction.

  The output side member 14 includes a cylindrical small-diameter cylindrical portion 30 provided at one end (right end in FIG. 1), and a substantially cylindrical large-diameter cylindrical portion 32 provided on the other side (left side in FIG. 1). And a disk-shaped connecting portion that connects the small-diameter cylindrical portion 30 and the large-diameter cylindrical portion 32. The output side member 14 is rotatably arranged and supported inside the housing. The input side member 12 and the output side member 14 are coaxially arranged. The small-diameter cylindrical portion 30 is fitted to the outer peripheral surface near the one end of the shaft portion 20 of the input side member 12 directly or via a bearing (not shown). For this reason, the output side member 14 is disposed so as to be rotatable relative to the input side member 12. In addition, the first outer rotor coaxially with respect to the output side member 14 is positioned at three positions in the axial direction of the large-diameter cylindrical portion 32 of the output side member 14 so as to face the inner rotors 24, 26, and 28, respectively. 34, a second outer rotor 36, and a third outer rotor 38 are provided. That is, each outer rotor 34, 36, 38 is separated in the axial direction.

  The stator 16 includes a shaft portion 40 and a substantially bottomed cylindrical stator main body portion 42 in which one end portion of the shaft portion 40 is coupled and fixed to the central portion of one surface thereof. A magnetic characteristic changing portion 44 is provided at the tip of the stator main body portion 42. The magnetic characteristic changing portion 44 is provided with a plurality of column portions 46 in a comb-teeth shape. The plurality of column portions 46 are provided at equal intervals at a plurality of locations in the circumferential direction of the magnetic property changing portion 44.

  In the illustrated example, the inner diameter and the outer diameter of the stator main body 42 are changed by the magnetic characteristic changing section 44. However, the inner diameter and the outer diameter of the stator main body 42 other than the magnetic characteristic changing section 44 are respectively changed to magnetic. The inner diameter and the outer diameter of the characteristic changing portion 44 may be the same. The cylindrical portion constituting the stator main body 42 is inserted between the inner peripheral surface of the large-diameter cylindrical portion 32 of the output side member 14 and the outer peripheral surface of each inner rotor 24, 26, 28 of the input side member 12. ing. The stator 16 is supported on the inner side of the housing and is arranged coaxially with the input side member 12 and the output side member 14. The stator 16 disables rotation with respect to the housing, while allowing movement in the axial direction with respect to the housing. For example, the shaft portion 40 of the stator 16 supports a hole portion (not shown) provided in the housing so as to be capable of displacement only in the axial direction. A ball spline mechanism may be provided between the inner peripheral surface of the hole provided in the housing and the outer peripheral surface of the small-diameter cylindrical portion 106 of the stator 16. Further, at least a portion including the magnetic characteristic changing portion 44 of the stator 16 is made of a magnetic material. That is, the magnetic characteristic changing portion 44 is constituted by magnetic material column portions 46 arranged at a plurality of circumferential positions at the same position in the axial direction of the stator 16.

  The actuator 18 is a linear actuator and is provided outside the shaft portion 40 constituting the stator 16. The shaft portion 40 is made of a magnetic material such as iron. The entire stator 16 may be made of a magnetic material such as iron. The actuator 18 includes a coil 48 and energizes the coil 48 in either direction, thereby displacing the shaft portion 40 to either side in the axial direction according to the energization direction.

  FIGS. 3A and 3B show another two examples of the actuator 18. In the case of a first example of another example of the actuator 18 shown in FIG. 3A, the actuator 18 includes a motor (not shown) and a shaft portion 52 that is coaxially coupled to the rotation shaft of the motor or is integral with the rotation shaft. The ball screw 54 is provided between them. The ball screw 54 includes a male ball screw groove provided on the outer peripheral surface of the shaft portion 52, a female ball screw groove provided on the inner peripheral surface of the tip portion of the cylindrical portion 56 coupled to the end portion of the shaft portion 40, and both male and female balls. A plurality of balls provided between the thread grooves. Between the shaft portion 40 and the fixed housing, for example, a guide portion (not shown) that guides the axial movement of the shaft portion 40 while preventing the rotation of the shaft portion 40 is provided. When the shaft portion 52 is rotated by rotating the motor in any direction, the shaft portion 40 provided with the cylindrical portion 56 moves in any one of the axial directions corresponding to the rotation direction.

  In the case of the second example of another example of the actuator 18 shown in FIG. 3B, the actuator 18 includes a substantially cylindrical permanent magnet 58 coupled and fixed to the outer peripheral surface of the shaft portion 40 and magnetized in the radial direction. The coil 48 is provided at three positions in the axial direction outside the shaft portion 40 so as to face the permanent magnet 57 in the radial direction. Both end portions of the permanent magnet 57 are formed in a substantially conical cylinder shape whose outer diameter decreases toward the end in the axial direction. By selectively energizing 1 or 2 of each coil 48 in any direction and stopping energization, the shaft portion 40 can be selectively and smoothly moved to any one of the three axial directions, and stopped. Can be made. A similar function can be obtained by coupling and fixing a cylindrical portion made of a magnetic material having the same shape as the permanent magnet 57 instead of the permanent magnet 57 to the outer peripheral surface of the shaft portion 40.

  Returning to FIG. 1, a plurality of inner permanent magnets 58, 60 and 62 are provided on the outer peripheral surfaces of the first inner rotor 24, the second inner rotor 26 and the third inner rotor 28, respectively. FIG. 4 shows a portion where the first inner rotor 24 and the first outer rotor 34 are opposed, a portion where the second inner rotor 26 and the second outer rotor 36 are opposed, a third inner rotor 28 and a third outer rotor. FIG. 6 is a perspective view showing the magnetic characteristics changing unit 44 together with the portions facing each other 38 separated from each other. The inner permanent magnets 58, 60, 62 provided on the inner rotors 24, 26, 28 are magnetized in the radial direction of the inner rotors 24, 26, 28, and the inner permanent magnets 58, 60, 62 are magnetized. The magnetic directions are alternately varied at equal intervals in the circumferential direction. For this reason, each inner rotor 24, 26, 28 includes a plurality of inner permanent magnets 58, 60, 62 provided on the outer peripheral surface so that N poles and S poles are alternately arranged in the circumferential direction. That is, each inner rotor 24, 26, 28 is arranged such that a plurality of inner permanent magnets 58, 60, 62 are arranged in the circumferential direction.

  The number of inner permanent magnets 58, 60, 62 of each inner rotor 24, 26, 28 is different from each other. For example, in FIG. 2, the first inner rotor 24 is illustrated, and among the plurality of inner permanent magnets 58 provided on the first inner rotor 24, an N pole is disposed on the outer peripheral surface of a portion with a diagonal lattice. The white portion is an S-pole arranged on the outer peripheral surface. In the illustrated example, the inner permanent magnet 58 provided on the first inner rotor 24 is a 5-pole pair.

  5A, 5B, and 5C show cross-sectional portions of the first inner rotor 24, the second inner rotor 26, and the third inner rotor 28, respectively. The black portions of the inner permanent magnets 58, 60, 62 indicate that the N pole is disposed on the outer peripheral surface, and the white portions indicate that the S pole is disposed on the outer peripheral surface. In the illustrated example, the inner permanent magnet 60 provided on the second inner rotor 26 is a nine-pole pair (FIG. 5B), and the inner permanent magnet 62 provided on the third inner rotor 28 is a 15-pole pair ( FIG. 5 (c)).

  2 and 4, a plurality of outer permanent magnets 64, 66, and 68 are provided on the inner peripheral surfaces of the first outer rotor 34, the second outer rotor 36, and the third outer rotor 38, respectively. The outer permanent magnets 64, 66, 68 are magnetized in the radial direction of the outer rotors 34, 36, 38, and the magnetization directions of the outer permanent magnets 64, 66, 68 are alternately spaced at equal intervals in the circumferential direction. It is different. Therefore, each outer rotor 34, 36, 38 includes a plurality of outer permanent magnets 64, 66, 68 provided on the inner peripheral surface so that N poles and S poles are alternately arranged in the circumferential direction. In other words, a plurality of outer permanent magnets 64, 66, 68 are arranged in each outer rotor 34, 36, 38 in the circumferential direction. The number of outer permanent magnets 64, 66, 68 of each outer rotor 34, 36, 38 is different from each other. For example, in FIG. 2, the first outer rotor 34 is illustrated, and among the plurality of outer permanent magnets 64 provided in the first outer rotor 34, a portion with a diagonal lattice is arranged with an N pole on the inner peripheral surface. The white part is an S pole disposed on the inner peripheral surface. In the illustrated example, the outer permanent magnet 64 provided on the first outer rotor 34 has 39 pole pairs.

  5A, 5B, and 5C show cross-sectional portions of the first outer rotor 34, the second outer rotor 36, and the third outer rotor 38, respectively. The black portions of the outer permanent magnets 64, 66, and 68 indicate that the N pole is disposed on the inner peripheral surface, and the white portions indicate that the S pole is disposed on the inner peripheral surface, respectively. Yes. In the illustrated example, the outer permanent magnet 66 provided on the second outer rotor 36 is a 35-pole pair (FIG. 5B), and the outer permanent magnet 68 provided on the third outer rotor 38 is a 29-pole pair ( FIG. 5 (c)).

  In addition, the magnetic characteristic changing portion 44 constituting the stator 16 is coaxially spaced between any of the inner and outer rotors and is disposed so as not to rotate in the radial direction. In the example shown in FIG. 2, the number of column portions 46 constituting the magnetic characteristic changing portion 44 of the stator 16 is 44. In addition, a speed change portion that allows transmission of power between the input side member 12 and the output side member 14 while shifting the power is configured by a portion in which the magnetic characteristic change portion 44 is opposed to the inner rotor and the outer rotor facing each other in the radial direction. To do. Since the stator 16 is movable in the axial direction, the transmission unit causes the magnetic property changing unit 44 to face the first inner rotor 24 and the first outer rotor 34 as shown in FIGS. 2 and 5A. 5 (b), the second transmission unit 72 having the magnetic characteristic changing unit 44 opposed to the second inner rotor 26 and the second outer rotor 36, and FIG. 5 (c). As shown in FIG. 3, the three states of the third transmission unit 74 in which the magnetic characteristic changing unit 44 is opposed to the third inner rotor 28 and the third outer rotor 38 can be realized. The transmission ratios of the transmission units 70, 72, and 74 are different from each other. In other words, it is possible to switch from one transmission unit to another transmission unit having a transmission ratio different from that of the one transmission unit by moving the stator 16 in the axial direction.

  Further, when the first transmission unit 70, the second transmission unit 72, and the third transmission unit 74 are realized, the number of pole pairs of the permanent magnets of the inner rotors 24, 26, 28 and the outer rotors 34, 36, 38, and the stator When the number of the column portions 46 of the sixteen magnetic property changing portions 44 is arranged, the following Table 1 is obtained.

  Further, the number of column portions 46 provided in the magnetic characteristic changing portion 44 is Ns, the number of pole pairs of the magnetic poles provided in the inner rotors 24, 26, 28 is Pi1, Pi2, Pi3, and the outer rotors 34, 36. , 38, the number of pole pairs of Po1, Po2, Po3 is one of Ns = Po1 + Pi1, Ns = Po2 + Pi2, and Ns = Po3 + Pi3 in each of the switchable shifters 70, 72, 74. Is established. Here, Pi1, Pi2, and Pi3 are the number of pole pairs of the magnetic poles of the first inner rotor 24, the second inner rotor 26, and the third inner rotor 28, respectively, and Po1, Po2, and Po3 are the first outer rotor 34, This is the number of pole pairs of the magnetic poles of the second outer rotor 36 and the third outer rotor 38.

  As shown in FIG. 1, the plurality of outer rotors 34, 36, and 38 are on the same side in the axial direction as the side on which the inner rotors 24, 26, and 28 of the input member 12 are provided on the output member 14. It is provided on the left side of FIG.

  Further, from the state in which any one of the speed change portions 70, 72, 74 is configured in which the stator 16 is moved in the axial direction by the actuator 18 and the magnetic characteristic changing portion 44 is opposed to one inner rotor and the outer rotor in the radial direction. By switching to a state in which the different speed change portions 70, 72, 74 are configured in which the magnetic characteristic changing portion 44 is opposed to the other inner rotor and the outer rotor in the radial direction, between the input side member 12 and the output side member 14 The reduction ratio Gr, which is the speed ratio at, can be switched. For example, as shown in Table 1 above, in the state in which the first transmission unit 70 is configured, the reduction ratio Gr, that is, when power is input to the input side member 12 from a power source such as an engine, the output side member 14 The degree to which the output power is decelerated is Pi1 / Po1 = 0.128. Further, in the state where the second transmission unit 72 is configured, the reduction ratio Gr is Pi2 / Po2 = 0.257. In the state where the third transmission unit 74 is configured, the reduction ratio Gr is Pi3 / Po3 = 0.517. Note that the reduction ratio Gr realized by each of the transmission units 70, 72, and 74 is changed so as to gradually increase in the order of the first transmission unit 70, the second transmission unit 72, and the third transmission unit 74. It can also be changed so that it gradually decreases.

  In the state where the speed change portions 70, 72, 74 are configured as described above, the operation in which power is transmitted from the input side member 12 to the output side member 14 is as follows. For example, as shown in the left diagrams of FIGS. 2 and 5A, in the state in which the first transmission unit 70 is configured, the first inner rotor 24 and the first outer rotor 34 and the magnetic characteristic changing unit 44 of the stator 16 are provided. When the first inner rotor 24 rotates in the direction of the arrow in FIGS. 2 and 5 (a), the power is transmitted to the input side member 12 from a power source such as an engine, for example. Think. In this case, the column portion 46 of the magnetic property changing portion 44 is magnetized by the magnetic field of the inner permanent magnet 58 of the first inner rotor 24, and the inner permanent magnet 58 rotates, so the magnetization direction of the column portion 46 also changes alternately. A rotating magnetic field that rotates in the same direction as the first inner rotor 24 is generated outside the magnetic characteristic changing portion 44. Accordingly, a force in the direction of attraction or repulsion acts on the column portion 46 on the outer permanent magnet 64 of the first outer rotor 34, and as a result, the first outer rotor 34 also rotates. In this case, since the first transmission unit 70 is configured to realize Ns = Po1 + Pi1, the first outer rotor 34 rotates in the opposite direction to the rotation direction of the first inner rotor 24, and the output side member 14 rotates in the opposite direction to the rotation direction of the input side member 12.

  Further, when Ns = Po1 + Pi1 is established when the first transmission unit 70 is configured, the power of the input side member 12 is decelerated by the output side member 14 at a reduction ratio of Pi1 / Po1. Communicated. That is, when the speed of the output side member 14 is Vo and the speed of the input side member 12 is Vi, Vo = (Pi1 / Po1) × Vi. The power of the output side member 14 can be taken out via an appropriate power transmission mechanism (not shown).

  On the other hand, from the state of the right figure in FIG. 1 and FIG. 5A, energization in either direction to the coil 48 of the actuator 18 (or the motor when the actuator 18 is constituted by the ball screw 54). When the stator 16 is moved in the direction of the arrow P in the figure by rotation in one of the directions, the second inner rotor 26 and the second outer rotor 36 are moved as shown in the right figure of FIG. The second transmission unit 72 is configured in which the magnetic characteristic changing unit 44 is opposed in the radial direction. In this state, when the second inner rotor 26 rotates, for example, in the direction of the arrow in the left diagram of FIG. 5B, a rotating magnetic field is generated in the column portion 46 of the magnetic characteristic changing unit 44 as described above, and the second outer rotor 36 rotates in the opposite direction to the second inner rotor 26. When Ns = Po2 + Pi2 is established when the second transmission unit 72 is configured in this way, the power of the input side member 12 is decelerated by the output side member 14 at a reduction ratio of Pi2 / Po2. Is transmitted.

  5B, when the stator 16 is further moved in the direction of the arrow P by the actuator 18 from the state shown in the right figure of FIG. 5B, the third inner rotor is shown as shown in the right figure of FIG. Thus, the third speed change portion 74 is configured in which the magnetic characteristic change portion 44 is opposed to the 28 and the third outer rotor 38 in the radial direction. In this state, when the third inner rotor 28 rotates, for example, in the direction of the arrow in the left diagram of FIG. 5C, a rotating magnetic field is generated in the column 46 of the magnetic characteristic changing unit 44 in the same manner as described above, and the third outer rotor 38 rotates in the opposite direction to the third inner rotor 28. When Ns = Po3 + Pi3 is established when the third transmission unit 74 is configured in this way, the power of the input side member 12 is decelerated to the output side member 14 at a reduction ratio of Pi3 / Po3. Is transmitted. 5C, when the stator 16 is moved in the direction of the arrow Q in the figure by the actuator 18, the state returns to the state where the second transmission portion 72 in FIG. When moved in the direction of arrow Q in the figure, the state returns to the state in which the first transmission unit 70 in FIG. 5A is configured.

  As described above, by enabling switching from one transmission unit to another transmission unit having a different transmission ratio, the transmission ratio between the input side member 12 and the output side member 14 can be switched. That is, the stator 16 is moved in the axial direction, and the magnetic characteristic changing unit 44 is moved from between the inner rotor and the outer rotor constituting one transmission unit to between the inner rotor and the outer rotor constituting another transmission unit. By doing so, it is equivalent to changing the gear ratio of a pair of gears meshing with each other.

  In the case of the actuator 18 shown in FIGS. 1 and 5, only one coil 48 is provided. However, when the coil 48 is energized, the magnet that has escaped from between the inner rotor and the outer rotor constituting one transmission unit. It is considered that the characteristic changing unit 44 moves smoothly between the adjacent inner and outer rotors and becomes easy to stop. However, a positioning sensor for detecting the axial position of the stator 16 is provided from the surface that stops the magnetic characteristic changing unit 44 between the inner rotor and the outer rotor with higher accuracy, and the detection signal of the positioning sensor is transmitted to the control unit. It is preferable to control the energization state to the coil 48 by the control unit.

  Further, the actuator 18 can be omitted, and the stator 16 and the operation unit that can be operated by the driver can be coupled by a mechanical coupling mechanism. The mechanical coupling mechanism displaces the stator 16 in the axial direction in accordance with operations such as pushing and pulling of the operation unit. In this way, the stator 16 can be manually displaceable in the axial direction.

  According to the magnetic multi-stage transmission mechanism 10 described above, a multi-stage transmission mechanism in which the gear ratio changes in a plurality of stages can be realized, and the tuning mechanism used in the mechanical multi-stage transmission mechanism can be eliminated. Can be simplified and miniaturized. That is, in the transmission units 70, 72, and 74, the outer rotor and the inner rotor are magnetically coupled via the stator, so that the input side member 12 and the output are compared with the case where the transmission unit is configured by a mechanical gear mechanism. It becomes easy to tolerate a deviation in rotational speed between each of the side members 14 to some extent. For this reason, unlike the case of the mechanical multi-speed transmission mechanism that requires the above-described tuning mechanism, it is possible to eliminate the need for strict adjustment of the gear position and the spline position and to eliminate the tuning mechanism. Therefore, the structure can be simplified and downsized. In addition, the synchronization mechanism can be eliminated, and mechanical engagement at the transmission units 70, 72, and 74 can be eliminated, so that mechanical loss can be reduced.

In this example, the number of the column portions 46 provided in the magnetic characteristic changing portion 44 is Ns, the number of pole pairs of the magnetic poles provided in each of the inner rotors 24, 26, and 28 is Pi1, Pi2, and Pi3. When the number of pole pairs of the magnetic poles provided on the rotors 34, 36, and 38 is Po1, Po2, and Po3, Ns = Po1 + Pi, Ns = Po2 + Pi2, Ns
Any one of s = Po3 + Pi3 is established. However, in the same case as described above, any one of Ns = Po1-Pi1, Ns = Po2-Pi2, and Ns = Po3-Pi3 can be established in each transmission unit. For example, when the number of column portions 46 constituting the magnetic characteristic changing portion 44 of the stator 16 is 34, the number of pole pairs of the permanent magnets of the first inner rotor 24 is set to 5, and the permanent magnets of the first outer rotor 34 are set. The number of pole pairs can be 39. When configured in this manner, the rotation of the input side member 12 is transmitted to the output side member 14 as power that rotates in the same direction as the rotation direction of the input side member 12. Further, in this case, the speed of the output side member 14 is reduced with a reduction ratio of Pi1 / Po1 with respect to the speed of the input side member 12. That is, when the speed of the output side member 14 is Vo and the speed of the input side member 12 is Vi, Vo = (Pi1 / Po1) × Vi.

  Further, the magnetic characteristic changing portion 44 constituting the stator 16 has been described as being configured in a comb shape by providing a plurality of column portions 46 at the distal end portion of the cylindrical portion constituting the stator main body portion 42. However, the magnetic characteristic changing unit 44 is not limited to such a configuration, and any magnetic characteristic may be used as long as the magnetic characteristics change alternately at equal intervals in the circumferential direction of the stator 16. For example, in the stator 16 of this example, the space between the plurality of column portions 46 can be filled with a non-magnetic material portion such as resin. In addition, instead of omitting the column portion 46 in the stator 16 of this example, slits that are long in the axial direction are provided at a plurality of circumferentially spaced equidistant positions in a part of the axial direction of the cylindrical portion made of magnetic material constituting the stator 16. It is also possible to form the magnetic characteristic changing portion. In this case, each slit is penetrated in the radial direction of the cylindrical portion. And the magnetic characteristic change part comprised in this way is enabled to move between the outer side rotor and inner side rotor which mutually oppose to radial direction. Even in such a configuration, the same function as in the case of the magnetic characteristic changing portion 44 configured by the column portion 46 can be obtained.

[Second Embodiment]
In the first embodiment, the case where the number of transmission units 70, 72, 74 is three and a three-stage transmission mechanism can be realized has been described. However, the present invention is not limited to such a configuration. . For example, the number of transmission units can be increased to make the transmission mechanism more multistage. FIG. 6 is a diagram corresponding to FIG. 4 and showing a magnetic multi-stage transmission mechanism according to the second embodiment of the present invention, which is an example of such multi-stage operation.

  In the case of this example, the input side member 12 (refer to FIG. 1 and the like) includes five inner sides including a first inner rotor 76, a second inner rotor 78, a third inner rotor 80, a fourth inner rotor 82, and a fifth inner rotor 84. A rotor is provided. Further, five outer rotors of the first outer rotor 86, the second outer rotor 88, the third outer rotor 90, the fourth outer rotor 92, and the fifth outer rotor 94 are provided on the output side member 14 (see FIG. 1 and the like). , And so as to face the corresponding inner rotor in the radial direction. By moving the magnetic characteristic changing portion 44 between each of the inner rotors 76, 78, 80, 82, 84 and the corresponding outer rotors 86, 88, 90, 92, 94, a different five-stage transmission portion is obtained. A first transmission unit, a second transmission unit,... A fifth transmission unit can be realized. The following Table 2 shows the number of pole pairs Pi and Po of the permanent magnets of the inner rotor and the outer rotor and the stator 16 (FIG. 1 etc.) when the first transmission unit, the second transmission unit,... The number Ns of the column parts 46 of reference) and an example of the reduction ratio in each transmission part are shown.

  Thus, the reduction ratio realized by each transmission unit is changed so as to gradually decrease in the order of the first transmission unit, the second transmission unit, ... the fifth transmission unit, but gradually increases. It can also be changed. Other configurations and operations are the same as those in the first embodiment. Moreover, the number of transmission parts is not limited to said 3 or 5, but can also be 2 or 4 or 6 or more.

[Example of compound magnetic multi-stage transmission mechanism]
In the second embodiment shown in FIG. 6, the speed change mechanism is multistaged by increasing the number of outer rotors and inner rotors constituting one magnetic multistage speed change mechanism. However, it is also possible to construct a composite magnetic multi-stage transmission mechanism by operatively connecting a plurality of magnetic multi-stage transmission mechanisms, each of which is a three-stage transmission mechanism, so that the transmission stages are multi-staged. FIG. 7 is a schematic view showing an example of a composite magnetic multi-stage transmission mechanism according to the present invention.

  The composite magnetic multi-stage transmission mechanism 96 of this example includes a plurality of magnetic multi-stage transmission mechanisms 10 and operatively connects the plurality of magnetic multi-stage transmission mechanisms 10 via a power transmission unit 98 such as a gear mechanism. It is constituted by. The basic configuration of each magnetic multi-stage transmission mechanism 10 is the same as that of the magnetic multi-stage transmission mechanism 10 of the first embodiment shown in FIGS. Each of the magnetic multi-stage transmission mechanisms 10 excluding one magnetic multi-stage transmission mechanism 10 (the magnetic multi-stage transmission mechanism 10 at the right end in FIG. 7) arranged on the most output side among the plurality of magnetic multi-stage transmission mechanisms 10. 10 is operatively connected to an input side member 12 constituting another magnetic multi-stage transmission mechanism 10 via a power transmission unit 98.

  For example, a gear portion is provided on the outer peripheral surface of the cylindrical portion of the output side member 14 constituting one magnetic multi-stage transmission mechanism 10, and the outer peripheral surface of a part of the input side member 12 constituting another magnetic multi-stage transmission mechanism 10 is provided. The power transmission unit 98 is configured by providing a gear unit and meshing the gear units. In this way, a plurality of magnetic multi-stage transmission mechanisms 10 are operatively connected, and in each of the magnetic multi-stage transmission mechanisms 10, the gear ratio between the input side member 12 and the output side member 14 can be switched. Yes. For example, by selectively operating one or two or more of the actuators 18 (see FIG. 1 or the like) constituting each magnetic multi-stage transmission mechanism 10, the respective gear ratios can be switched. Then, the rotation input to the input side member 12 of the magnetic multi-stage transmission mechanism 10 arranged closest to the input side is output to the output side of another magnetic multi-stage transmission mechanism 10 arranged most on the output side at a desired speed ratio. It can be taken out from the member 14. The operations of the actuators 18 constituting the respective magnetic multi-stage transmission mechanisms 10 are integrated and controlled by a control unit (not shown). In other words, the control unit operates the actuator 18 of the selected one or more magnetic multi-stage transmission mechanisms 10 according to the command value of the gear ratio acquired by being input to the control unit, etc. When power is input to the input side member 12 of the magnetic multi-stage transmission mechanism 10 arranged, power is output at a desired speed from the output side member 14 of another magnetic multi-stage transmission mechanism 10 arranged on the most output side. It can be taken out.

  According to such a configuration, a mechanical loss can be reduced, and a transmission mechanism with a larger number of stages can be realized with a simple structure. Other configurations and operations are the same as those of the first embodiment shown in FIGS.

[Third Embodiment]
FIG. 8 is a schematic sectional view of a magnetic multi-stage transmission mechanism according to the third embodiment of the present invention. In the case of the magnetic multi-stage transmission mechanism 10a of this example, the axial direction of the output side member 14 and the stator 16 is different from that of the magnetic multi-stage transmission mechanism 10 of the first embodiment shown in FIG. Each is reversed. In other words, the output side member 14 includes a bottomed cylindrical tube portion 100 and a shaft portion 102 coupled to one surface of the tube portion 100 (the left surface in FIG. 8). A first outer rotor 34, a second outer rotor 36, and a third outer rotor 38 are provided at three positions in the axial direction of the cylindrical portion 100. A flange portion 104 is provided at the end of the shaft portion 102. The first outer rotor 34, the second outer rotor 36, and the third outer rotor 38 are opposed to the first inner rotor 24, the second inner rotor 26, and the third inner rotor 28 provided in the input side member 12 in the radial direction, respectively. is doing. The output side member 14 is supported inside a housing (not shown) so as to be rotatable only.

  The stator 16 has a small-diameter cylindrical portion 106 and a large-diameter cylindrical portion 108 connected by a disk-shaped connecting portion. The small diameter cylindrical portion 106 is fitted to the outer peripheral surface of the shaft portion 20 of the input side member 12 directly or via a bearing or the like, supports the housing so as to be movable only in the axial direction, and rotates with respect to the housing. It is impossible. Therefore, the input side member 12 is rotatable with respect to the stator 16 and the housing. Therefore, the small-diameter cylindrical portion 106 of the stator 16 is supported so as to be displaceable only in the axial direction with respect to a hole portion (not shown) provided in the housing. A ball spline mechanism may be provided between the inner peripheral surface of the hole portion of the housing and the outer peripheral surface of the small diameter cylindrical portion 106 of the stator 16.

  In addition, the large-diameter cylindrical portion 108 of the stator 16 is made of a magnetic material such as iron, and a comb-teeth-shaped magnetic characteristic changing portion 44 configured by a plurality of column portions 46 is provided at the tip of the large-diameter cylindrical portion 108. ing. Further, the actuator 18 is configured by disposing the coil 48 so as to be opposed to the outside in the radial direction of the portion of the large diameter cylindrical portion 108 that is away from the magnetic characteristic changing portion 44. By energizing the coil 48 in any direction, the stator 16 can be displaced in any axial direction. The entire stator 16 may be made of a magnetic material, and the magnetic characteristic changing portion 44 can be configured by forming a plurality of slits instead of the comb-like magnetic characteristic changing portion 44. Moreover, the actuator 18 can also be comprised by either structure shown to said FIG. 3 (a) (b). Because of this configuration, the outer rotors 34, 36, and 38 are opposite in the axial direction to the output side member 14 on the side where the inner rotors 24, 26, and 28 of the input side member 12 are provided (left side in FIG. 8). It is provided on the side (right side in FIG. 8). Other configurations and operations are the same as those of the first embodiment shown in FIGS.

[Another example of composite magnetic multi-speed transmission mechanism]
FIG. 9 is a schematic view showing another example of the composite magnetic multi-speed transmission mechanism according to the present invention. The composite magnetic multi-stage transmission mechanism 96a of this example is different from the composite magnetic multi-stage transmission mechanism 96 shown in FIG. 7, and each of them is the magnetic multi-stage transmission mechanism of the third embodiment shown in FIG. 10a, a plurality of magnetic multi-stage transmission mechanisms 10a are linearly and operatively connected. That is, the input side member 12 and the output side member 14 of each magnetic multi-stage transmission mechanism 10a are all arranged coaxially. Among the plurality of magnetic multi-stage transmission mechanisms 10a, each magnetic multi-stage transmission mechanism 10a except for one magnetic multi-stage transmission mechanism 10a (the rightmost magnetic multi-stage transmission mechanism 10a in FIG. 9) arranged on the most output side is provided. The constituting output side member 14 is connected to an input side member 12 constituting another magnetic multi-stage transmission mechanism 10a via a shaft coupling such as a coupling mechanism or directly.

  Further, in each magnetic multi-stage transmission mechanism 10a, the gear ratio between the input side member 12 and the output side member 14 can be switched. Other configurations and operations are the same as those of the example of the composite magnetic multi-stage transmission mechanism shown in FIG. 7 or the magnetic multi-stage transmission mechanism 10a of the third embodiment shown in FIG.

[Fourth Embodiment]
FIG. 10 is a schematic cross-sectional view showing a magnetic multi-stage transmission mechanism 10b according to a fourth embodiment of the present invention. In the case of this example, in the magnetic multi-stage transmission mechanism 10a of the third embodiment shown in FIG. 8, not only the stator 16 but also the output side member 14 is movable in the axial direction with respect to the housing (not shown). . Therefore, the shaft portion 102 constituting the output side member 14 is made of a magnetic material such as iron, and the second actuator 112 is configured by disposing the second coil 110 oppositely on the radially outer side of the shaft portion 102. ing. By energizing the second coil 110 in any direction, the output-side member 14 can be displaced in any axial direction. In addition, the first inner rotor 24 and the second inner rotor 26 are provided on the input side member 12, and the first outer rotor is disposed so that the output side member 14 faces each of the first inner rotor 24 and the second inner rotor 26. 34 and a second outer rotor 36 are provided. Such a second actuator 18 can also be configured in the same manner as any of the configurations shown in FIGS. 3 (a) and 3 (b).

  In addition, a magnetic characteristic changing portion 44 is provided at the tip of the cylindrical portion 114 constituting the stator 16, and a second magnetic characteristic changing portion 116 is provided in an intermediate portion in the axial direction away from the magnetic characteristic changing portion 44. The second magnetic characteristic changing unit 116 alternately changes the magnetic characteristics in the circumferential direction. For example, the second magnetic characteristic changing unit 116 is configured by forming slits 118 that are long in the axial direction at equal intervals in the circumferential direction. Further, the number of the pillar portions 46 constituting the magnetic characteristic changing portion 44 is different from the number of the pillar portions 120 constituting the second magnetic property changing portion 44 provided between the slits 118 adjacent in the circumferential direction. ing.

  Thus, the output side member 14 and the stator 16 can be moved in the axial direction with respect to the housing, respectively, and the stator 16 further includes a magnetic characteristic changing portion 44 and a second magnetic characteristic changing portion 116 that are separated in the axial direction. The magnetic characteristic changing portions 44 and 116 are arranged such that different numbers of magnetic material column portions 46 and 120 are arranged in the circumferential direction. The output side member 14 includes a first outer rotor 34 and a second outer rotor 36 that are separated in the axial direction, and each of the outer rotors 34, 36, and 38 has a different number of outer permanent magnets arranged in the circumferential direction. Is arranged. Further, by shifting one or two of the output side member 14 and the stator 16 in the axial direction, it is possible to switch between a plurality of transmission units having different transmission ratios.

  For example, between the first outer rotor 34 and the first inner rotor 24, when one speed change unit is realized by arranging the magnetic characteristic changing unit 44 between the first outer rotor 34 and the first inner rotor 24. By arranging the second magnetic characteristic changing unit 116, a different transmission ratio can be realized when another transmission unit is realized. Further, by moving the first outer rotor 34 in the axial direction, the first outer rotor 34 or the second outer rotor 36 can be selectively opposed to the outside of the first inner rotor 24, and the second inner rotor The first outer rotor 34 or the second outer rotor 36 can be selectively opposed to the outer side of the H.26. Therefore, it is possible to realize a maximum of 8 transmission units having different transmission ratios. Further, the number of the column parts 46 and 120 constituting the magnetic characteristic changing unit 44 and the second magnetic characteristic changing unit 116 is Nsl (1 is 1 or 2), and the first inner rotor 24 and the second inner rotor 26 are provided. When the number of pole pairs of the magnetic poles is Pim (m is 1 or 2) and the number of pole pairs of the magnetic poles provided in the first outer rotor 34 and the second outer rotor 36 is Pon (n is 1 or 2) Further, it is configured such that Nsl = Pom + Pin or Nsl = Pom−Pin is established in each switchable switching unit.

  The operations of the actuator 18 and the second actuator 112 are integrated and controlled by a control unit (not shown). That is, the control unit operates one or two of the selected actuator 18 and the second actuator 112 in accordance with the command value of the gear ratio acquired by being input to the control unit or the like, and power is supplied to the input side member 12. When input, power can be taken out from the output side member 14 at a desired speed. Other configurations and operations are the same as those of the third embodiment shown in FIG.

  In the configuration of this example, the output-side member 14 cannot be moved in the axial direction relative to the housing, and the input-side member 12 can be moved in the axial direction relative to the housing. It can also be configured to be moved by the actuator. Moreover, the rotor provided in the input side member 12 and the output side member 14, and the magnetic characteristic change part provided in the stator 16 can each be 1 or 3 or more.

  Further, in the configuration of each of the above examples, the member that provides the outer rotor is the output side member 14, and the member that provides the inner rotor is the input side member 12, but the present invention is not limited thereto, and the member that provides the outer rotor is used. The input side member 12 to which power is input may be used, and the member provided with the inner rotor may be the output side member 14 to which power is output.

10, 10a, 10b Magnetic multi-stage transmission mechanism, 12 input side member, 14 output side member, 16 stator, 18 actuator, 20 shaft portion, 22 flange portion, 24 first inner rotor, 26 second inner rotor, 28 third Inner rotor, 30 Small-diameter cylindrical portion, 32 Large-diameter cylindrical portion, 34 First outer rotor, 36 Second outer rotor, 38 Third outer rotor, 40 Shaft portion, 42 Stator main body portion, 44 Magnetic property changing portion, 46 Column portion , 48 coils, 50 rotating shaft, 52 shaft portion, 54 ball screw, 56 tube portion, 57 permanent magnet, 58, 60, 62 inner permanent magnet, 64, 66, 68 outer permanent magnet, 70 first transmission portion, 72 first 2 speed change part, 74 3rd speed change part, 76 1st inner rotor, 78 2nd inner rotor, 80 3rd inner rotor, 82 4th inner rotor, 84 5th inner rotor , 86 First outer rotor, 88 Second outer rotor, 90 Third outer rotor, 92 Fourth outer rotor, 94 Fifth outer rotor, 96, 96a Compound magnetic multi-stage speed change mechanism, 98 power transmission unit, 100 cylinder portion, 102 shaft part, 104 flange part, 106 small diameter cylindrical part, 108 large diameter cylindrical part, 110 second coil, 112 second actuator, 114 cylindrical part, 116 second magnetic property changing part, 118 slit, 120 pillar part.

Claims (8)

A first rotating element and a second rotating element which are arranged coaxially with each other, and
An inner rotor provided in the first rotating element, the inner rotor including a plurality of inner permanent magnets provided so that N poles and S poles are alternately arranged in the circumferential direction on the outer circumferential surface;
An outer rotor provided in the second rotating element, the outer rotor including a plurality of outer permanent magnets provided so that N poles and S poles are alternately arranged in the circumferential direction on the inner peripheral surface;
A stator including a magnetic property changing portion disposed between the inner and outer rotors so as to be non-rotatable in the radial direction and having magnetic material column portions disposed at a plurality of locations in the circumferential direction;
A portion that makes the magnetic property changing portion radially opposed to the inner rotor and the outer rotor constitutes a transmission portion that can transmit power while shifting power between the first and second rotating elements,
A magnetic multi-stage transmission mechanism characterized in that it can be switched to another transmission unit having a transmission ratio different from that of the transmission unit. The magnetic multi-stage transmission mechanism according to claim 1,
Of the first rotating element, the second rotating element, and the stator, 1 or 2 includes any one of a plurality of inner rotors, outer rotors, and magnetic property changing portions separated in the axial direction,
The number of column portions provided in at least one magnetic characteristic changing portion is Ns, the number of pole pairs of magnetic poles provided in at least one inner rotor is Pi, and the number of pole pairs of magnetic poles provided in at least one outer rotor is In the case of Po, Ns = Po + Pi or Ns = Po−Pi is established in each of the switchable shift units.
A magnetic multi-speed transmission characterized in that at least one of the first rotating element, the second rotating element, and the stator is moved in the axial direction so that the gear ratio between the first and second rotating elements can be switched. mechanism. The magnetic multi-stage transmission mechanism according to claim 2,
The first rotating element includes a plurality of axially separated inner rotors, and each inner rotor is arranged such that a different number of inner permanent magnets are arranged in the circumferential direction.
The second rotating element includes a plurality of axially separated outer rotors, and each outer rotor is arranged such that a different number of outer permanent magnets are arranged in the circumferential direction.
The stator includes a magnetic property changing portion configured by magnetic material column portions arranged at a plurality of locations in the circumferential direction at the same position in the axial direction,
When the number of pillars is Ns, the number of pole pairs of magnetic poles provided on at least one inner rotor is Pi, and the number of pole pairs of magnetic poles provided on at least one outer rotor is Po, each switchable Ns = Po + Pi or Ns = Po−Pi is established in the transmission unit,
A state in which the stator is moved in the axial direction, and the magnetic property changing portion is radially opposed to one inner rotor and the outer rotor, and the magnetic property changing portion is radially opposed to another inner rotor and outer rotor. A magnetic multi-stage transmission mechanism characterized in that the transmission gear ratio between the first and second rotating elements can be switched by switching to. The multi-stage transmission according to claim 3,
Each of the first rotating element and the second rotating element and the stator can be moved in the axial direction,
The stator includes a plurality of magnetic property change portions separated in the axial direction, and each magnetic property change portion is arranged so that different numbers of magnetic material column portions are arranged in the circumferential direction,
One rotating element includes a plurality of axially separated inner rotors or outer rotors, and each inner rotor or each outer rotor is arranged such that a different number of inner permanent magnets or outer permanent magnets are arranged in the circumferential direction. And
When the number of pillars is Ns, the number of pole pairs of magnetic poles provided on at least one inner rotor is Pi, and the number of pole pairs of magnetic poles provided on at least one outer rotor is Po, each switchable A magnetic multi-stage transmission mechanism characterized in that Ns = Po + Pi or Ns = Po−Pi is established in the transmission unit. In the magnetic multi-stage transmission mechanism according to any one of claims 1 to 4,
The first rotating element is an input side member to which power is input,
The magnetic multi-stage transmission mechanism, wherein the second rotating element is an output side member that outputs power. The magnetic multi-stage transmission mechanism according to claim 5,
A magnetic multi-stage speed change mechanism, wherein an output side member is provided with an outer rotor on the same side in the axial direction as the side on which the inner side rotor of the input side member is provided. The magnetic multi-stage transmission mechanism according to claim 5,
A magnetic multi-stage speed change mechanism, wherein an output side member is provided with an outer rotor on an opposite side with respect to an axial direction of the input side member. Each of the magnetic multi-stage transmission mechanisms according to any one of claims 5 to 7 is a composite magnetic multi-stage transmission mechanism configured by operatively connecting a plurality of magnetic multi-stage transmission mechanisms.
An output side member constituting at least one magnetic multi-stage transmission mechanism is operatively connected to an input side member constituting another magnetic multi-stage transmission mechanism via a power transmission unit or directly;
In each of the magnetic multi-stage speed change mechanisms, the gear ratio between the input side member and the output side member can be switched.

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