JP2009095173A - Counter rotor mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a counter rotor mechanism capable of increasing flexibility in setting a speed ratio between the input side and the output side without excessively upsizing the structure when the counter rotor mechanism is used as a power transmission mechanism. <P>SOLUTION: The counter rotor mechanism includes: an inner rotor 12 made of magnetic material; an outer rotor 14 made of magnetic material, which is arranged in a concentric manner with the inner rotor 12 outward in a radial direction of the inner rotor 12; and a stator 16 with magnets, which is mounted outward in a radial direction of the outer rotor 14. A portion of the circumferential surface of the inner rotor 12 is provided with internal teeth 28 having a plurality of inner teeth elements 30. At a portion of the outer rotor 14 facing the inner teeth 28 in a radial direction, there is provided a cylindrical portion 32 with holes having a plurality of pillar portions 36. Each pitch Pi in a circumferential direction of the inner teeth elements 30 is different from each pitch Po in the circumferential direction of the pillar portions 36. On the inner circumferential portion of the stator 16 with magnets, portions with higher magnetic field strength and portions with lower magnetic field strength are alternately allocated in the circumferential direction. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention provides an inner rotor made of magnetic material, an outer rotor made of magnetic material arranged concentrically with the inner rotor on the radially outer side of the inner rotor, and on the radially inner side of the inner rotor or on the radially outer side of the outer rotor. The present invention relates to a counter rotor mechanism including a magnetic field generation unit.

  2. Description of the Related Art Conventionally, there are known two magnet rotating bodies having different axes and facing each other, or an opposed rotor mechanism including two magnets. For example, in Patent Document 1, two magnet rotating bodies magnetized in multiple poles are arranged so that their outer peripheral surfaces are spaced from each other, and the magnetic poles face each other with an attractive magnetic force due to different polarities, A drive transmission mechanism is described that corresponds to an opposing rotor mechanism that follows the rotation of one magnet rotating body and transmits the other magnet rotating body by sequentially feeding it.

  Patent Document 2 describes a power transmission mechanism corresponding to a circumscribed or inscribed counter rotor mechanism in which a yoke is placed so as to fill an air gap when a driving magnet and a driven magnet are opposed to each other. Has been.

JP 2006-132614 A JP-A-6-197520

  In the case of the conventional structures described in Patent Document 1 and Patent Document 2, the structure includes two magnets arranged concentrically, and the pitch of one pole of the two magnets, that is, the interval in the circumferential direction is set. It is not considered that the two magnets are different. For this reason, in the case of the conventional structures described in Patent Document 1 and Document 2, the speed ratio between the input side and the output side when used as a power transmission mechanism without increasing the size of the structure is obtained. There is room for improvement in terms of increasing the degree of freedom in setting the speed ratio, such as increasing or decreasing the speed ratio. For example, in the conventional structure described in Patent Document 1, in order to increase the reduction ratio between the input side and the output side, the diameter of one magnet rotating body of two magnet rotating bodies is set to the other magnet rotating speed. It is necessary to increase the diameter of the body, that is, to increase the radius difference between the two rotating bodies. For this reason, the structure may become excessively large. Also in the case of the conventional structure described in Patent Document 2, in order to increase the reduction ratio between the input side and the output side, the diameter of one of the driving side magnet and the driven side magnet is increased. There is a need.

  Further, in the case of the conventional structures described in Patent Document 1 and Patent Document 2, it is not considered that at least a part of the output of electric power and power is used as an output conversion mechanism capable of conversion.

  The present invention improves the degree of freedom in setting the speed ratio between the input side and the output side without excessively increasing the size of the structure when used as a power transmission mechanism in the opposed rotor mechanism. Objective.

  The opposed rotor mechanism according to the present invention includes an inner rotor made of a magnetic material having an inner shape changing portion on the outer peripheral surface, and is arranged concentrically with the inner rotor on the radially outer side of the inner rotor, and changes in inner shape on the inner peripheral surface An outer rotor made of a magnetic material having an outer shape change portion facing the outer portion, and a magnetic field generator provided on the radially outer side of the outer rotor or the radially inner side of the inner rotor. The shape of the surface is changed at a plurality of equally spaced positions in the circumferential direction, and the outer shape changing portion is changed at a plurality of equally spaced positions in the inner circumferential surface of the inner shape changing portion. The circumferential pitch and the circumferential pitch of the outer shape change portion are different from each other, and the portion of the magnetic field generating portion on the inner peripheral side or the outer peripheral side having a large magnetic field strength and a small portion are Alternatingly arranged in the circumferential direction It is opposed rotor mechanism according to claim.

  Preferably, the inner shape changing portion is an inner tooth having inner tooth elements protruding radially outward at a plurality of equal intervals in the circumferential direction of the outer peripheral surface, and the outer shape changing portion is equal in the circumferential direction. Let it be a cylindrical part with a hole which has the hole part which penetrates in a radial direction in several places.

  In the configuration according to the present invention, preferably, the inner shape changing portion is an inner tooth having inner tooth elements protruding radially outward at a plurality of equally spaced positions in the circumferential direction of the outer peripheral surface, and the outer shape changing portion is The outer teeth have outer tooth elements projecting radially or axially at a plurality of equally spaced locations in the circumferential direction of the inner peripheral surface.

  More preferably, an input shaft coupled to one of the inner rotor and the outer rotor, and an output shaft coupled to the other rotor of the inner rotor and the outer rotor, and a magnetic Used as a dynamic power transmission mechanism.

  More preferably, the magnetic field generator is a stator with a magnet in which N poles and S poles are alternately arranged in the circumferential direction.

  In the configuration according to the present invention, preferably, the magnetic field generator is a coiled stator in which coils in which alternating currents having different phases flow are arranged at a plurality of locations in the circumferential direction.

  In the configuration according to the present invention, preferably, the first shaft coupled to one of the inner rotor and the outer rotor, and the first shaft coupled to the other rotor of the inner rotor and the outer rotor. The magnetic field generator is a stator with a coil in which coils with alternating currents having different phases are arranged at a plurality of locations in the circumferential direction, and is used as an output conversion mechanism.

  According to the counter rotor mechanism according to the present invention, the circumferential pitch of the inner shape changing portion and the circumferential pitch of the outer shape changing portion are made different, and the inner or outer peripheral side of the magnetic field generating portion is different. In addition, the portions where the magnetic field strength is large and the portions where the magnetic field strength is small are alternately arranged in the circumferential direction of the magnetic field generating portion. For this reason, when used as a power transmission mechanism, the inner shape changing portion and the outer shape changing portion are close to each other in the radial direction with the largest area at the portion where the magnetic field strength is high on the inner or outer peripheral side of the magnetic field generating portion. And the inner shape changing portion and the outer shape changing portion can be located farthest away from each other at the inner or outer peripheral side of the magnetic field generating portion, and at the input side and the output side. It becomes possible to provide a speed difference. That is, a portion called a magnetic flux permeance, which is easy to flow of magnetic flux, is arranged corresponding to a portion where the inner shape changing portion and the outer shape changing portion are closest to each other. Further, the speed ratio between the input side and the output side can be arbitrarily set according to the number of shape change elements between the inner shape change portion and the outer shape change portion, for example, the ratio of the number of teeth. Moreover, the structure is not excessively enlarged. For this reason, when using as a power transmission mechanism, the freedom degree of the setting of the speed ratio between an input side and an output side can be improved, without enlarging a structure too much. Further, it is not necessary to provide a meshing portion of teeth that come into contact with each other in the power transmission portion for providing a speed difference between the input side and the output side, and mechanical loss can be suppressed to a low level.

  Further, according to the configuration in which the magnetic field generator is a stator with a coil in which coils having alternating currents having different phases are arranged at a plurality of locations in the circumferential direction, the magnetic field is generated by the coil and the magnetic field is rotated. Is possible. Therefore, by controlling the rotational speed of the rotating magnetic field, when used as a power transmission mechanism, the rotational speed and power on the output side can be adjusted corresponding to the rotational speed and power on the input side.

  The magnetic field generator includes a first shaft coupled to one of the inner rotor and the outer rotor, and a second shaft coupled to the other rotor of the inner rotor and the outer rotor. Is a stator with a coil in which coils with alternating currents flowing in different phases are arranged at a plurality of locations in the circumferential direction. According to the configuration used as an output conversion mechanism, the number of rotations of a rotating magnetic field by a magnetic field generator is controlled. Accordingly, at least a part of the output can be converted between the outputs of the respective powers of the first axis and the second axis and the electric power that generates the rotating magnetic field. For example, it is possible to generate a rotating magnetic field by supplying electric power to the magnetic field generating unit, and to extract electric power from the magnetic field generating unit. Adjustment is possible by controlling the rotational state of the two axes.

[First Embodiment]
Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. 1 to 13 show a first embodiment of the present invention. FIG. 1 is a schematic cross-sectional view of a power transmission mechanism that includes the counter rotor mechanism of the present embodiment. FIG. 2 is an enlarged cross-sectional view taken along the line AA of FIG. FIG. 3 is a view corresponding to FIG. 2, showing the state in which the outer rotor rotates in turn with the rotation of the inner rotor from the state of FIG. 2. FIG. 4 is an enlarged view of FIG. FIG. 5 is a view corresponding to the enlarged view of the B part in FIG. 4, which sequentially shows the state in which the outer rotor rotates as the inner rotor rotates. FIG. 6 is an enlarged view of FIG. FIG. 7 is an enlarged view of FIG. FIG. 8 is an enlarged view of FIG. FIG. 9 is an enlarged view of FIG. FIG. 10 is an enlarged view of FIG. FIG. 11 is an enlarged view of FIG. FIG. 12 is an enlarged view of FIG. FIG. 13 is an enlarged view of FIG.

  As shown in FIG. 1, a counter rotor mechanism 10 of the present embodiment is used as a power transmission mechanism, and includes an inner rotor 12, an outer rotor 14, and a magnet-equipped stator that is a substantially cylindrical magnetic field generator. 16, an input shaft 18, and an output shaft 20. The input shaft 18 and the output shaft 20 are arranged concentrically, that is, coaxially, and are rotatably supported by a fixed portion (not shown) by a bearing or the like.

  The inner rotor 12 is made of a columnar or cylindrical magnetic material, and is coupled and fixed to one end portion (the right end portion in FIG. 1) of the input shaft 18. Further, the outer rotor 14 is made of a bottomed cylindrical magnetic material, and the bottom portion is coupled and fixed to the other end of the output shaft 20 (the left end in FIG. 1). Further, an inner collar portion 22 is provided at the other end portion (the left end portion in FIG. 1), which is the open end of the outer rotor 14, protruding radially inward over the entire circumference. The inner collar portion 22 can be omitted.

  Further, by providing the bearings 24 between the axial end portions of the outer peripheral surface of the inner rotor 12 and the axial end portions of the inner peripheral surface of the outer rotor 14, the inner rotor 12 is arranged on the radially inner side of the outer rotor 14. The outer rotor 14 is supported concentrically and rotatably with respect to the outer rotor 14. That is, the outer rotor 14 is disposed concentrically with the inner rotor 12 on the radially outer side of the inner rotor 12.

  Further, by providing bearings 26 between the axial end portions of the outer peripheral surface of the outer rotor 14 and the axial end portions of the inner peripheral surface of the magnet-equipped stator 16, the outer rotor 14 has a diameter of the magnet stator 16. It is supported on the inner side in the direction concentrically with the magnet-equipped stator 16 and rotatably with respect to the magnet-equipped stator 16. In addition, the bearing 24 provided between the inner side rotor 12 and the outer side rotor 14, and the bearing 26 provided between the outer side rotor 14 and the stator 16 with a magnet can also be made into one piece, respectively. Moreover, the stator 16 with a magnet is used in the state fixed by fitting inside the housing which is not shown which is a fixing | fixed part.

  Further, the inner rotor 12 has inner teeth 28 that are inner shape changing portions on the outer peripheral surface in the axially intermediate portion. The inner teeth 28 have inner tooth elements 30 that protrude radially outward at a plurality of equally spaced positions in the circumferential direction of the outer peripheral surface. For this reason, the shape of the outer peripheral surface of the inner teeth 28 changes at a plurality of positions at equal intervals in the circumferential direction.

  Further, the outer rotor 14 has a cylindrical portion 32 with a hole, which is an outer shape changing portion, in an intermediate portion in the axial direction. The cylindrical portion 32 with a hole has slits 34 that are holes that penetrate in the radial direction at a plurality of equally spaced locations in the circumferential direction. The slit 34 has a rectangular cross section that is long in the axial direction of the cylindrical portion 32 with a hole. For this reason, as for the cylindrical part 32 with a hole part, the shape of an internal peripheral surface is changing in several places at equal intervals regarding the circumferential direction. That is, the slits 34 are located at a plurality of circumferentially equidistant positions in the cylindrical portion 32 with holes, and the portions between the adjacent slits 34 in the circumferential direction are located at a plurality of equally spaced intervals in the circumferential direction of the cylindrical portion 32 with holes. It becomes the pillar part 36 (FIG. 2) located in FIG. The inner teeth 28 provided on the outer peripheral surface of the inner rotor 12 and the slits 34 and the column portions 36 provided in the outer rotor 14 are opposed to each other in the radial direction of the inner rotor 12 and the outer rotor 14.

  Further, as shown in detail in FIG. 2, the circumferentially equidistant intervals of the portion facing the outer peripheral surface of the portion where the slit 34 and the column portion 36 provided in the outer rotor 14 are formed in the radially inner portion of the stator 16 with magnet. Permanent magnets 38 are arranged at four places, which are a plurality of places. The permanent magnet 38 is magnetized in the radial direction of the stator 16 with magnet, and the magnetization direction is made different between the permanent magnets 38 adjacent in the circumferential direction. For this reason, N poles and S poles are alternately arranged in the circumferential direction at four circumferentially equal intervals on the inner circumferential surface of the stator 16 with magnet. As a result, the magnetic flux flows out from the two N poles on the diametrically opposite side of the stator 16 with magnet to the inner peripheral side, and the S of the two parts of the portion where the N pole of the stator 16 with magnet and the phase in the circumferential direction differ by 90 degrees. Magnetic flux flows into the pole from the inner periphery. Therefore, the portion with a large magnetic field strength and the portion with a small magnetic field strength on the inner peripheral side of the stator 16 with magnet are alternately arranged in the circumferential direction of the stator 16 with magnet. In FIG. 2, the portion surrounded by the alternate long and short dash line α is a portion where the magnetic field strength is high, and the portion indicated by the satin surface in FIG. 2 is a portion where the magnetic field strength is low.

  Furthermore, in the present embodiment, the number m of the column portions 36 provided on the outer rotor 14 is set to be smaller than the number n of the inner tooth elements 30 provided on the inner rotor 12 (m <n). In the illustrated example, the number m of the column portions 36 is 20 and the number n of the inner tooth elements 30 is 24. And the pitch Pi of the circumferential direction which is the space | interval regarding the circumferential direction of the inner side tooth element 30 is made smaller than the pitch Po of the circumferential direction of the pillar part 36 (Pi <Po), and mutual pitch Pi, Po Are different.

  As shown in the figure, the permanent magnet 38 is coupled in a state where it is exposed on the inner peripheral surface of the cylindrical portion 40 made of a non-magnetic material constituting the magnet-equipped stator 16, and is opposed to the outer peripheral surface of the outer rotor 14. Alternatively, it may be embedded in the cylindrical portion 40 so as to face the outer peripheral surface of the outer rotor 14 through a part of the cylindrical portion 40 closer to the inner diameter.

  According to the counter rotor mechanism 10 of the present embodiment as described above, the structure is excessively enlarged when used as a power transmission mechanism that transmits power between the input shaft 18 and the output shaft 20. Therefore, the degree of freedom in setting the speed ratio between the input shaft 18 and the output shaft 20 can be improved.

  That is, as shown in FIG. 2, the inner teeth 12 and the outer rotor 14 having the inner tooth elements 30 and the column portions 36 having different pitches Pi and Po are arranged concentrically, and the inner teeth having the inner tooth elements 30. 28 and the cylindrical portion 32 with a hole having the column portion 36 are opposed to each other in the radial direction, so that the inner tooth elements 30 are provided at a plurality of circumferential positions (four in the illustrated example) of the rotors 12 and 14. The outer peripheral part and the inner peripheral part of the column part 36 are located in the part where the area is the largest, and the opposing part that faces in the radial direction is located. And in each opposing part, magnetic flux flows most easily between each rotor 12 and 14. FIG.

  On the other hand, regarding the phase in the circumferential direction of each rotor 12, 14, the column portion 36 and the inner tooth element 30 are non-opposing portions that do not oppose each other in the radial direction at portions that differ by 45 degrees from the opposing portions. . In each non-opposing portion, the magnetic flux hardly flows between the rotors 12 and 14. Further, since the permanent magnets 38 are arranged at four locations in the circumferential direction corresponding to the opposing portions of the stator 16 with magnet, when the inner rotor 12 is rotated by rotating the input shaft 18, The outer rotor 14 rotates so that the magnetic field strength becomes the largest at the portion closest to each inner tooth element 30. In this case, the rotational speed of the outer rotor 14 is higher than the rotational speed of the inner rotor 12. Specifically, in the case of the illustrated example in which the number of the column portions 36 is 20 and the number of the inner tooth elements 30 is 24, the reciprocal of the ratio between the column portions 36 and the inner tooth elements 30 is 1.2. The outer rotor 14 rotates at a high speed that is obtained by multiplying the rotational speed of the inner rotor 12 by. That is, when the inner rotor 12 rotates, the outer rotor 14 rotates while making it easier for the magnetic flux to flow in the portion where the magnetic field strength is large.

In other words, both rotors 12 and 14 are always closest to each other at a portion where the magnetic field strength is large. More specifically, the ratio of the rotational speed or the rotational speed between the inner rotor 12 and the outer rotor 14 is equal to the ratio of the reciprocal number of the number n of the inner tooth elements 30 and the number m of the column portions 36. In the illustrated example, since there are 24 inner tooth elements 30 and 20 column portions 36, n = 24 and m = 20, and the rotational speed ω _n of the inner rotor 12 and the rotational speed ω of the outer rotor 14. The ratio to _m is ω _n : ω _m = 1/24: 1/20 = 5: 6. For this reason, the outer rotor 14 with a small number m of column portions 36 rotates at a rotational speed 1.2 times that of the inner rotor 12 with a large number n of inner tooth elements 30.

  3 to 13 show this in more detail. First, as shown in FIG. 3, when the inner rotor 12 rotates in the arrow β direction from the state (a), the outer rotor 14 rotates in the arrow γ direction along with this, and the states from (a) to (h) To (a) again. That is, FIG. 5A shows an enlarged view of FIG. 3A, which is an enlarged view of part B of FIG. Then, from the state shown in FIG. 5 (a), the outer rotor 14 rotates in the direction of arrow γ as it rotates in the direction of arrow β, and the state changes from (a) to (h). ) State. FIGS. 5A to 5H correspond to FIGS. 3A to 3H, respectively. 3 to 5 and FIGS. 6 to 13 to be described later, the shaded portion is a portion where the magnetic field strength is highest in the circumferential direction on the inner peripheral side of the magnet-mounted stator 16 based on the permanent magnet 38. The corresponding part is shown.

  Next, in FIGS. 6 to 13, which are enlarged views of FIGS. 5 (a) to 5 (h), two inner tooth elements 30 adjacent to each other in the circumferential direction of the inner rotor 12 are denoted by Q 1 and Q 2, and the outer rotor The rotation state of the inner side rotor 12 and the outer side rotor 14 is demonstrated by making two pillar parts 36 adjacent to the circumferential direction of 14 into R1 and R2. In FIG. 6, the inner tooth element Q1 and the column part R1 are positioned substantially at the center of the portion where the magnetic field strength is large, and the entire outer peripheral part of the inner tooth element Q1 faces the inner peripheral part of the column part R1 in the radial direction. ing. As shown in FIGS. 7 and 8, the outer rotor 14 rotates as the inner rotor 12 rotates. In this case, the column portion R1 gradually deviates from the portion where the magnetic field strength is high, and conversely. The column R2 adjacent to the rear side in the rotation direction of the column R1 gradually approaches a portion where the magnetic field strength is high. For this reason, the column part R2 is magnetically pulled in the direction indicated by the arrow δ in FIGS. 7 and 8 by the permanent magnet 38 so as to approach the portion where the magnetic field strength is faster than the opposed inner tooth element Q2. Next, as shown in FIG. 9 to FIG. 12, the column R2 is moved by the arrow δ in FIG. 9 to FIG. 12 by the permanent magnet 38 so as to approach the portion where the magnetic field strength is faster than the opposed inner tooth element Q2. Further pulled in the direction shown, the state shown in FIG. 13 is obtained. From the state shown in FIG. 13, the state returns to the state shown in FIG. 6, but in this case, the column part R <b> 2 and the inner tooth element Q <b> 2 in FIG. 13 are located at the positions of the column part R <b> 1 and the inner tooth element Q <b> 1 in FIG. Moved. In this way, the outer rotor 14 rotates at a higher speed than the inner rotor 12. Further, with the 1/4 rotation of the inner rotor 12, the column portion 36 of the outer rotor 14 is shifted forward by one in the rotation direction with respect to the inner tooth element 30 of the inner rotor 12. That is, while the inner rotor 12 rotates once, the outer rotor 14 rotates faster by an amount corresponding to the difference (nm) between the number n of the inner tooth elements 30 and the number m of the pillar portions 36. As a result, the magnitude obtained by multiplying the reciprocal number 1.2 (= 24/20) of the ratio m / n between the number m of the column portions 36 and the number n of the inner tooth elements 30 by the rotational speed of the inner rotor 12 is high. The outer rotor 14 rotates at the number of rotations.

  According to the counter rotor mechanism 10 of the present embodiment as described above, the pitch Pi in the circumferential direction of the inner tooth element 30 constituting the inner tooth 28 and the circumference of the column portion 36 constituting the cylindrical portion 32 with a hole. The direction pitch Po is made different, and the portion with a large magnetic field strength and the portion with a small magnetic field strength on the inner peripheral side of the stator 16 with magnet are alternately arranged in the circumferential direction of the stator 16 with magnet. For this reason, when used as a power transmission mechanism, the inner tooth element 30 and the column portion 36 face each other in the largest area on the inner peripheral side of the stator 16 with magnet so as to approach the radial direction in the largest area. And the inner tooth element 30 and the column part 36 can be made the most separated in the part with a small magnetic field intensity | strength of the inner peripheral side of the stator 16 with a magnet. Therefore, it is possible to provide a speed difference between the input shaft 18 and the output shaft 20. That is, a portion called a magnetic flux permeance, which is easy to flow of magnetic flux, is arranged corresponding to a portion where the inner tooth element 30 and the column portion 36 are closest to each other.

  Further, the speed ratio between the input shaft 18 and the output shaft 20 can be arbitrarily set corresponding to the ratio n / m of the number of the inner tooth elements 30 and the column portions 36. Moreover, the structure of the opposed rotor mechanism 10 is not excessively increased. For this reason, when using as a power transmission mechanism, the freedom degree of the setting of the speed ratio between the input shaft 18 and the output shaft 20 can be improved, without enlarging a structure excessively. Moreover, it is not necessary to provide the meshing part of the tooth | gear which mutually contacts in the power transmission part for providing a speed difference by the input shaft 18 side and the output shaft 20 side, and can suppress a mechanical loss small. Further, it is not necessary to arrange the permanent magnets 38 on the inner rotor 12 and the outer rotor 14.

  In the present embodiment, the magnet-equipped stator 16 is in a fixed state. However, the magnet-equipped stator 16 may be rotatable by, for example, coupling and fixing another rotating shaft (not shown) to the magnet-equipped stator 16.

[Second Embodiment]
FIG. 14 is a schematic cross-sectional view corresponding to FIG. 2 in the counter rotor mechanism according to the second embodiment of the present invention. In the first embodiment shown in FIG. 2 described above, the number n of the inner tooth elements 30 constituting the inner teeth 28 provided on the outer peripheral surface of the inner rotor 12 is replaced with the cylindrical portion with holes provided in the outer rotor 14. It was more than the number m of the column part 36 which comprises 32 (n> m). On the other hand, in the counter rotor mechanism 10a of the present embodiment, the number n of the inner tooth elements 30 constituting the inner teeth 28 provided on the outer peripheral surface of the inner rotor 12 is set to the cylinder with holes provided in the outer rotor 14. The number is less than the number m of the column portions 36 constituting the portion 32 (n <m). In the illustrated example, the number n of the inner tooth elements 30 is 20, and the number m of the column portions 36 is 24. In this case, even if the inner rotor 12 rotates, the column portion 36 adjacent to the front side in the rotation direction is also permanent with respect to the column portion 36 located at the portion with the highest magnetic field strength on the inner peripheral side of the stator 16 with magnet. Due to the magnetic force of the magnet 38, the magnet 38 is magnetically pulled backward in the rotation direction. For this reason, the rotational speed of the outer rotor 14 is smaller than the rotational speed of the inner rotor 12. In this case, 1 / 1.2 (= 20/24), which is the reciprocal n / m of the ratio between the number m of the column portions 36 and the number n of the inner tooth elements 30, is set to the rotational speed of the inner rotor 12. The outer rotor 14 rotates at a low rotational speed multiplied by. Since other configurations and operations are the same as those in the first embodiment, the same parts are denoted by the same reference numerals, and overlapping illustrations and descriptions are omitted.

[Third Embodiment]
FIG. 15 is a schematic cross-sectional view corresponding to FIG. 2 in the counter rotor mechanism according to the third embodiment of the present invention. FIG. 16 is a collinear diagram showing the relationship between the rotational speeds of the outer rotor 14, the inner rotor 12, and the rotating magnetic field in the counter rotor mechanism of the third embodiment.

  In the case of the counter rotor mechanism 10b in the present embodiment, the stator 16 with magnet is not provided on the radially outer side of the outer rotor 14 in the first embodiment shown in FIGS. Instead, a stator 42 with a coil, which is a magnetic field generator, is provided on the outer side in the radial direction of the outer rotor 14. The coiled stator 42 is generally cylindrical and is fitted and fixed inside a housing (not shown).

  The stator 42 with a coil has the same configuration as that of a stator constituting a three-phase winding distributed winding type motor. U-phase, V-phase, W-phase in which alternating currents having different phases flow in a plurality of circumferential directions are provided. A coil 44, which is a phase winding, is disposed. The stator 42 with a coil has slots 46 at a plurality of circumferentially equidistantly spaced locations (12 locations in the illustrated example) on the inner circumferential surface, and the same phase is provided so as to be spanned every two slots 46 in the circumferential direction. The coil 44 is wound. In addition, each phase coil 44 is connected to the middle point of each U-phase, V-phase, and W-phase arm in an inverter (not shown). Each phase arm includes two switching elements such as IGBTs and transistors connected in series. The inverter is connected to a DC power source. The inverter is connected to the control unit, and the control unit generates a signal for controlling the switching element of the inverter and outputs the signal to the inverter.

  Such a coiled stator 42 can generate a magnetic field by a three-phase alternating current from an inverter, and a high magnetic flux density portion (a portion indicated by hatching in FIG. 15), which is a portion having a high magnetic field strength on the inner peripheral side. Can be arranged at arbitrary positions at a plurality of locations (four locations in the illustrated example) at equal intervals in the circumferential direction. Further, the high magnetic flux density portion can be rotated in the circumferential direction of the coiled stator 42, that is, a rotating magnetic field can be generated. Further, the number of rotations of the rotating magnetic field generated on the inner peripheral side of the coiled stator 42 can be controlled by controlling the inverter by the control unit. In the illustrated example, the coil 44 is arranged on the stator 42 with coil by distributed winding, but the coil 44 can also be arranged by concentrated winding.

  According to the counter rotor mechanism 10b of the present embodiment as described above, it is possible to generate a magnetic field by the coil 44 and to rotate a portion having a high magnetic field strength, that is, to generate a rotating magnetic field. Therefore, by controlling the rotational speed of the rotating magnetic field, when used as a power transmission mechanism, the output shaft 20 (see FIG. 1) corresponds to the rotational speed and power of the input shaft 18 (see FIG. 1). The rotation speed and power can be adjusted.

  The operation of the counter rotor mechanism 10b of this embodiment will be described in detail with reference to FIG. In FIG. 16, the vertical axis represents the rotation speed, and the case where the upper side rotates in one direction in the same direction with 0 as the boundary, and the case where the lower side rotates in the other direction in the same direction are shown. In the description of FIG. 16, the same elements as those of FIG.

As shown in FIG. 16, the rotational speeds of the inner rotor 12 and the outer rotor 14 and the rotating magnetic field are on a straight line determined by the number of inner tooth elements 30 of the inner rotor 12 and column portions 36 of the outer rotor 14. To position. For example, the number of column portions 36 is m, and the number of inner tooth elements 30 is n. Further, the rotational speed and torque of the outer rotor 14 are set to ω _m and T _m , the rotational speed and torque of the inner rotor 12 are set to ω _n and T _n , respectively, and the rotational speed of the rotating magnetic field is set to ω _e . In this case, the following equation is established for the rotational speed.
nω _n = mω _m + (n−m) ω _e (1)

In the same case, the following equation (2) is established for the torque of the outer rotor 14 and the inner rotor 12.
T _n / n = T _m / m (2)

Here, when the rotational speed ω _e of the rotating magnetic field is 0, from the equation (1),
nω _n = mω _m (3)
Is established. Therefore, when the rotational speed ω _e is 0, the counter rotor mechanism 10b has a ratio between the number m of the column portions 36 and the number n of the inner tooth elements 30 as in the above embodiments. Accordingly, it can be seen that the motor operates as a power transmission mechanism in which the ratio of the rotational speed of the output shaft 20 to the rotational speed of the input shaft 18 is determined.

In addition, when taking the product of the right side and the left side of equations (1) and (2),
T _n ω _n = T _m ω _m + (n−m) (T _m ω _e ) / m (4)
Is established.

In the expression (4), the left side corresponds to the output of the inner rotor 12, the first term on the right side corresponds to the output of the outer rotor 14, and the second term on the right side corresponds to the output due to the rotation of the magnetic field. . Since T _n and ω _n on the input side and (n−m) (T _m ω _e ) / m on the rotating magnetic field side can be controlled in advance, the expressions (1) and (4) Thus, the relationship between the speeds of the inner rotor 12 and the outer rotor 14 is controlled, and the magnitude of the transmission power from the inner rotor 12 to the outer rotor 14, that is, the magnitude of the transmission power between the input shaft 18 and the output shaft 20. It can be seen that it is also possible to control the height. Therefore, in this embodiment, by controlling the rotational speed ω _e of the rotating magnetic field, when used as a power transmission mechanism, the output shaft corresponds to the rotational speed and power of the input shaft 18 (see FIG. 1). The rotational speed and power of 20 (see FIG. 1) can be adjusted.

  In the first embodiment and the second embodiment, when the magnet-equipped stator 16 (FIG. 1) is rotated, the magnet-equipped stator 16 is moved corresponding to the inertia in the rotation direction. However, in this embodiment, the magnetic field can be rotated while the coiled stator 42 is fixed. For this reason, energy consumption can be made small.

  In addition, for example, the coil 44 is wound only on a total of eight slots 46 in each of four circumferentially equidistant positions among a plurality of slots 46 (FIG. 15) on the inner peripheral surface of the stator 42 with coil. In this state, it is possible to prevent a portion with a high magnetic field strength from rotating, for example, by passing a current of a constant magnitude through the coil 44.

  Further, in the present embodiment, the output shaft 20 coupled to the outer rotor 14 can be rotated at a predetermined speed ratio with respect to the rotational speed of the input shaft 18 coupled to the inner rotor 12, for example, a rotational speed of a reduction ratio. At the same time, the speed ratio, for example, the reduction ratio can be changed continuously. Since other configurations and operations are the same as those of the first embodiment shown in FIGS. 1 to 13 described above, the same parts are denoted by the same reference numerals, and overlapping illustrations and descriptions are omitted.

[Fourth Embodiment]
Further, the structure of the inner shape changing portion provided in the inner rotor and the outer shape changing portion provided in the outer rotor are limited to the structures of the inner teeth 28 and the cylindrical portion 32 with holes as in each of the above embodiments. It is not a thing. For example, FIG. 17 is a diagram corresponding to FIG. 1 in the fourth embodiment of the present invention. As shown in FIG. 17, the outer rotor 14 is provided with comb-like cylindrical portions 48, and axial notches 50 are provided at a plurality of circumferentially equally spaced locations (for example, 20 locations) of the comb-like cylindrical portions 48. An external tooth 54 having a plurality of (for example, 20) outer tooth elements 52 protruding in the axial direction can also be formed. In this case, the external tooth 54 corresponds to the outer shape changing portion. Since other configurations and operations are the same as those of the first embodiment shown in FIGS. 1 to 13 described above, the same parts are denoted by the same reference numerals, and redundant description is omitted.

[Fifth Embodiment]
FIG. 18 is a diagram corresponding to FIG. 6 in the fifth embodiment of the present invention. As shown in FIG. 18, the outer rotor 14 is provided with a cylindrical portion 56, and outer tooth elements 58 projecting in the radial direction are provided at a plurality of circumferentially equally spaced locations (for example, 20 locations) on the inner peripheral surface of the cylindrical portion 56. The external tooth 60 which has can also be comprised. In this case, the external tooth 60 corresponds to the outer shape change portion. Since other configurations and operations are the same as those of the first embodiment shown in FIGS. 1 to 13 described above, the same parts are denoted by the same reference numerals, and redundant description is omitted.

  In each of the above embodiments, as shown in FIG. 1 and the like, the input shaft 18 is coupled to the inner rotor 12 and the output shaft 20 is coupled to the outer rotor 14, but the output shaft is coupled to the inner rotor 12. It is also possible to couple the input shaft to the outer rotor 14. Further, the magnet-equipped stator 16 or the coil-equipped stator 42 (FIG. 15), which is a magnetic field generating unit, may be arranged on the radially inner side of the inner rotor 12 with the inner rotor 12 being cylindrical.

  In the third embodiment shown in FIGS. 15 to 16, the case where the counter rotor mechanism 10b is used as a power transmission mechanism has been described. However, the same as the counter rotor mechanism of the third embodiment is described. Using the configuration, the input shaft 18 (see FIG. 1) is the first shaft coupled to the inner rotor 12, and the output shaft 20 (see FIG. 1) is the second shaft coupled to the outer rotor 14, facing each other. The rotor mechanism 10b can also be used as an output conversion mechanism.

  The output conversion mechanism is, for example, an output conversion mechanism that converts at least part of the output between outputs of power applied from one of the first axis and the second axis and electric power that generates a rotating magnetic field. Use as According to the configuration in which the third embodiment as described above is used as the output conversion mechanism, by controlling the rotational speed of the rotating magnetic field by the coiled stator 42 (FIG. 15) as the magnetic field generating unit, At least a part of the output can be converted between the outputs of the respective powers of the second shaft and the electric power that generates the rotating magnetic field. For example, it is possible not only to generate a rotating magnetic field by supplying power to the coiled stator 42, but also to extract power from the coiled stator 42. It is possible to adjust by controlling the rotation state of the first axis and the second axis. Further, by configuring so that electric power can be taken out, another shaft can be rotationally driven by the electric power via a motor or the like.

  Further, using the same configuration as the configuration shown in FIG. 3, the opposed rotor mechanism 10b is operated like a synchronous reluctance motor, and the first shaft coupled to the inner rotor 12 is moved with respect to the rotational speed of the second shaft. It is also possible to rotate at a certain speed ratio.

  In each of the above embodiments, the number of the inner tooth elements 30 is 24 or 20, and the number of the pillar portions 36 is 20 or 24. However, the present invention is limited to such a combination of numbers. Instead, various combinations can be employed.

It is a schematic sectional drawing which comprises a power transmission mechanism provided with the opposing rotor mechanism of the 1st Embodiment of this invention. It is expansion AA schematic sectional drawing of FIG. FIG. 3 is a view corresponding to FIG. 2, sequentially illustrating a state in which the outer rotor rotates as the inner rotor rotates from the state of FIG. 2. FIG. 4 is an enlarged view of FIG. It is a figure corresponding to the B section enlarged view of Drawing 4 showing the state where an outside rotor rotates in order with rotation of an inside rotor. It is an enlarged view of Fig.5 (a). FIG. 6 is an enlarged view of FIG. FIG. 6 is an enlarged view of FIG. FIG. 6 is an enlarged view of FIG. FIG. 6 is an enlarged view of FIG. FIG. 6 is an enlarged view of FIG. FIG. 6 is an enlarged view of FIG. FIG. 6 is an enlarged view of FIG. FIG. 6 is a schematic cross-sectional view corresponding to FIG. 2 in the counter rotor mechanism according to the second embodiment of the present invention. FIG. 9 is a schematic cross-sectional view corresponding to FIG. 2 in the counter rotor mechanism according to the third embodiment of the present invention. In the counter rotor mechanism of 3rd Embodiment, it is a collinear diagram which shows the relationship of each rotational speed of an outer side rotor, an inner side rotor, and a rotating magnetic field. In the 4th Embodiment of this invention, it is a figure corresponding to FIG. FIG. 7 is a diagram corresponding to FIG. 6 in a fifth embodiment of the present invention.

Explanation of symbols

  10, 10a, 10b Opposing rotor mechanism, 12 inner rotor, 14 outer rotor, 16 stator with magnet, 18 input shaft, 20 output shaft, 22 inner collar, 24, 26 bearing, 28 inner teeth, 30 inner tooth elements, 32 Cylindrical part with hole, 34 slit, 36 column part, 38 permanent magnet, 40 cylindrical part, 42 stator with coil, 44 coil, 46 slot, 48 comb-like cylindrical part, 50 notch, 52 outer tooth element, 54 external tooth , 56 cylindrical part, 58 outer tooth element, 60 external teeth.

Claims (7)

An inner rotor made of magnetic material having an inner shape changing portion on the outer peripheral surface;
An outer rotor made of a magnetic material that is disposed concentrically with the inner rotor on the radially outer side of the inner rotor and has an outer shape change portion facing the inner shape change portion on the inner peripheral surface;
A magnetic field generator provided on the radially outer side of the outer rotor or on the radially inner side of the inner rotor,
The inner shape changing part changes the shape of the outer peripheral surface at a plurality of equally spaced locations in the circumferential direction,
The outer shape change part changes the shape of the inner peripheral surface at a plurality of equally spaced locations in the circumferential direction.
While changing the circumferential pitch of the inner shape changing portion and the circumferential pitch of the outer shape changing portion, the magnetic field generating portion on the inner peripheral side or the outer peripheral side has a portion with a large magnetic field strength and a small portion. The opposed rotor mechanism is characterized by being alternately arranged with respect to the circumferential direction of the magnetic field generator. The opposed rotor mechanism according to claim 1,
The inner shape changing portion is an inner tooth having inner tooth elements protruding radially outward at a plurality of equally spaced locations in the circumferential direction of the outer peripheral surface,
2. The opposed rotor mechanism, wherein the outer shape change portion is a cylindrical portion with a hole having holes that penetrate in a radial direction at a plurality of equally spaced locations in the circumferential direction. The opposed rotor mechanism according to claim 1,
The inner shape changing portion is an inner tooth having inner tooth elements protruding radially outward at a plurality of equally spaced locations in the circumferential direction of the outer peripheral surface,
2. The opposed rotor mechanism according to claim 1, wherein the outer shape changing portion is an outer tooth having outer tooth elements projecting radially or axially at a plurality of equally spaced locations in the circumferential direction of the inner peripheral surface. In the opposing rotor mechanism according to any one of claims 1 to 3,
An input shaft coupled to one of the inner rotor and the outer rotor;
An output shaft coupled to the other rotor of the inner rotor and the outer rotor,
An opposed rotor mechanism used as a magnetic power transmission mechanism. In the counter rotor mechanism according to any one of claims 1 to 4,
The opposed rotor mechanism, wherein the magnetic field generator is a stator with a magnet in which N poles and S poles are alternately arranged in a circumferential direction. In the counter rotor mechanism according to any one of claims 1 to 4,
The opposing rotor mechanism, wherein the magnetic field generator is a coiled stator in which coils in which alternating currents having different phases flow are arranged at a plurality of locations in the circumferential direction. In the opposing rotor mechanism according to any one of claims 1 to 3,
A first shaft coupled to one of the inner rotor and the outer rotor;
A second shaft coupled to the other rotor of the inner rotor and the outer rotor,
The magnetic field generator is a stator with a coil in which coils in which alternating currents with different phases flow are arranged at a plurality of locations in the circumferential direction.
An opposed rotor mechanism that is used as an output conversion mechanism.

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