JP2004312800A - Stator structure of multi-axis multilayer motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure of a stator of a multiple shaft multilayer motor which can reduce a loss due to an induced current, reduce the amount of a leakage magnetic flux from a main magnetic flux, and raise stator rigidity due to the force generated from the motor, together. <P>SOLUTION: The multiple shaft multilayer motor M includes an inner rotor IR and an outer rotor OR disposed in a concentric disc shape via the stator S so that the stator S has positioning members for positioning a plurality of divided stator teeth 41 with coils 42 at an equal pitch interval on the circumference. The multiple shaft multilayer motor M further includes engaging parts 55a of the stator teeth 41 each composed of a laminated steel sheet and disposed at an equal interval on the circumference as the positioning members. Ring shaped members 55 obtained by finely forming the members between the engaging parts 55a and 55a are used. The ring shaped members 55 are set to the inner peripheral positions of the stator teeth 41. And, the stator tees 41 divided into the engaging parts 55a of the ring shaped members 55 are assembled. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention belongs to the technical field of a stator structure of a multi-axis multilayer motor applied to a hybrid drive unit or the like.
[0002]
[Prior art]
Conventionally, a stator of a multi-axis multi-layer motor in which an inner rotor and an outer rotor are arranged concentrically with a stator interposed therebetween has a plurality of coiled stator teeth in which coils are wound around stator teeth formed of laminated steel plates. A positioning pin for positioning a plurality of coiled stator teeth on the circumference at equal pitch intervals; a front bracket member and a rear bracket member for holding the coiled stator teeth divided from both sides in a positioning state by the pins; (For example, Patent Document 1).
[0003]
[Patent Document 1]
JP-A-2001-169483.
[0004]
[Problems to be solved by the invention]
However, in the conventional multi-axis multilayer motor, the positioning pins of the stator teeth are formed integrally with the bracket members for holding and fixing the stator teeth, so that the positioning pins are disposed in the path of the magnetic flux. In addition, there is a problem that a loss due to an induced current caused by a change in magnetic flux increases. Further, in order to reduce the loss due to the induced current, it is necessary to use a material that does not allow the induced current to flow.
[0005]
The present invention has been made in view of the above problems, and achieves a combination of reducing the loss due to the induced current, reducing the amount of leakage magnetic flux with respect to the main magnetic flux, and increasing the stator rigidity due to the force generated by the motor. It is an object of the present invention to provide a stator structure of a multi-shaft multilayer motor that can perform the above-described operations.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, in the present invention,
An inner rotor and an outer rotor are arranged concentrically with a stator interposed therebetween, and the stator has a plurality of coiled stator teeth formed by winding coils around stator teeth formed of laminated steel plates at equal pitch intervals on the circumference. In a multi-axis multilayer motor having a positioning member for performing positioning by
As the positioning member, a ring-shaped member formed of a laminated steel sheet, having fitting portions of stator teeth arranged at equal pitch intervals on the circumference, and forming a thin member between the fitting portions,
The ring-shaped member is set at an inner peripheral position of the stator teeth or an outer peripheral position of the stator teeth, and the divided stator teeth are assembled to a fitting portion of the ring-shaped member.
[0007]
【The invention's effect】
Therefore, in the stator structure of the multi-axis multi-layer motor of the present invention, since the ring-shaped member for positioning and holding the stator teeth is formed of a laminated steel plate, the induced current generated by the change in magnetic flux is less likely to flow, and the induced current is reduced. Loss can be reduced. Furthermore, since the passage of the magnetic flux in the portion corresponding to between the stator teeth is narrowed, a structure in which a certain amount of magnetic flux does not pass due to magnetic saturation is achieved, so that the amount of leakage magnetic flux with respect to the main magnetic flux can be reduced. Further, since the positioning member is a ring-shaped member connected in a ring shape, the stator rigidity due to the force generated by the motor can be increased.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments for realizing a stator structure of a multi-axis multilayer motor of the present invention will be described based on first to sixth examples shown in the drawings.
[0009]
(First embodiment)
First, the configuration will be described.
[0010]
[Overall configuration of hybrid drive unit]
FIG. 1 is an overall view of a hybrid drive unit to which the multi-shaft multi-layer motor of the first embodiment is applied. In FIG. 1, E is an engine, M is a multi-shaft multi-layer motor, G is a Ravigneaux type compound planetary gear train, D Denotes a drive output mechanism, 1 denotes a motor cover, 2 denotes a motor case, 3 denotes a gear housing, and 4 denotes a front cover.
[0011]
The engine E is a main power source of the hybrid drive unit. The engine output shaft 5 is connected to the second ring gear R2 of the Ravigneaux-type compound planetary gear train G via a rotation fluctuation absorbing damper 6 and a multi-plate clutch 7. ing.
[0012]
The multi-shaft multi-layer motor M is a single motor in appearance, but is a sub power source having two motor generator functions. The multi-axis multi-layer motor M is fixed to the motor case 2 and has a stator S as a fixed armature wound with a coil, an inner rotor IR disposed inside the stator S and having a permanent magnet embedded therein, The outer rotor OR having the permanent magnets embedded therein is disposed outside of the outer rotor S and coaxially arranged in three layers. A first motor hollow shaft 8 fixed to the inner rotor IR is connected to a first sun gear S1 of the Ravigneaux-type compound planetary gear train G, and a second motor shaft 9 fixed to the outer rotor OR is a Ravigneaux-type compound planetary gear. It is connected to the second sun gear S2 in the row G.
[0013]
The Ravigneaux type compound planetary gear train G is a hybrid transmission having a continuously variable transmission function of changing the speed ratio steplessly by controlling two motor rotation speeds. The Ravigneaux type compound planetary gear train G includes a common carrier C that supports a first pinion P1 and a second pinion P2 that mesh with each other, a first sun gear S1 that meshes with the first pinion P1, and a second sun gear that meshes with the second pinion P2. S2, a first ring gear R1 that meshes with the first pinion P1, and a second ring gear R2 that meshes with the second pinion P2. A multiple disc brake 10 is interposed between the first ring gear R1 and the gear housing 3. An output gear 11 is connected to the common carrier C.
[0014]
The drive output mechanism D includes an output gear 11, a first counter gear 12, a second counter gear 13, a drive gear 14, a differential 15, and drive shafts 16L and 16R. The output rotation and output torque from the output gear 11 pass through the first counter gear 12, the second counter gear 13, the drive gear 14, and the differential 15, and are transmitted from the drive shafts 16L, 16R to drive wheels (not shown). You.
[0015]
That is, the hybrid drive unit connects the second ring gear R2 and the engine output shaft 5 via the multi-plate clutch 7, connects the first sun gear S1 and the first motor hollow shaft 8, and connects the second sun gear S2 And the second motor shaft 9 and an output gear 11 to the common carrier C.
[0016]
[Configuration of hybrid transmission]
FIG. 2 is a longitudinal sectional view showing the hybrid transmission. In FIG. 2, reference numeral 2 denotes a motor case, 3 denotes a gear housing, and 4 denotes a front cover. A Ravigneaux type compound planetary gear train G and a drive output mechanism D are arranged in a gear chamber 30 surrounded by these.
[0017]
The second ring gear R2 of the Ravigneaux type compound planetary gear train G is rotationally driven from the engine E when the multi-plate clutch 7 is engaged through the rotation fluctuation absorbing flywheel damper 6, the transmission input shaft 31, and the clutch drum 32. Torque is input.
[0018]
A first motor hollow shaft 8 is spline-coupled to a first sun gear S1 of the Ravigneaux type compound planetary gear train G, and a first torque and a first torque are transmitted from an inner rotor IR of the multi-shaft multilayer motor M according to a determined motor operating point. The first rotation speed is input.
[0019]
A second motor shaft 9 is spline-coupled to the second sun gear S2 of the Ravigneaux type compound planetary gear train G, and a second torque and a second torque are transmitted from the outer rotor OR of the multi-shaft multilayer motor M according to a determined motor operating point. Two revolutions are input.
[0020]
A multi-plate brake 10 is provided between the first ring gear R1 of the Ravigneaux-type compound planetary gear train G and the gear housing 3, and when the multi-plate brake 10 is fastened at the time of starting or the like, the first ring gear R1 is turned off. Stop.
[0021]
An output gear 11 rotatably supported on a stator shaft 48 via a bearing is spline-coupled to a common carrier C of the Ravigneaux type compound planetary gear train G.
[0022]
The drive output mechanism D includes a first counter gear 12 meshing with the output gear 11, a second counter gear 13 provided on a shaft portion of the first counter gear 12, and a drive gear 14 meshing with the second counter gear 13. And The final reduction ratio is determined by the ratio of the number of teeth between the second counter gear 13 and the drive gear 14.
[0023]
An engagement pressure is supplied to a clutch piston 33 of the multi-plate clutch 7 by a clutch pressure oil passage 34 formed in the front cover 4. Further, a fastening pressure is supplied to a brake piston 35 of the multi-plate brake 10 by a brake pressure oil passage 36 formed in the front cover 4. The clutch piston 33 and the brake piston 35 are disposed inside the front cover 4 at an inner peripheral position, and the brake piston 35 is disposed at an outer peripheral position.
[0024]
A shaft oil passage 37 is formed in the transmission input shaft 31, and lubricating oil is supplied to the shaft oil passage 37 via a lubricating oil passage 38 formed in the front cover 4. You.
[0025]
[Configuration of multi-axis multi-layer motor]
FIG. 3 is a longitudinal sectional side view showing a multi-axis multilayer motor M to which the stator structure of the first embodiment is applied, and FIG. 4 is a partially longitudinal front view showing the multi-axis multilayer motor M to which the stator structure of the first embodiment is applied. FIG. 5 and FIG. 5 are explanatory diagrams showing an example of a composite current applied to the stator coil of the multi-axis multilayer motor M. In FIG. 3, reference numeral 1 denotes a motor cover, and 2 denotes a motor case. A multi-axis multilayer motor M including an inner rotor IR, a stator S, and an outer rotor OR is arranged in a motor chamber 17 surrounded by the motor cover. I have.
[0026]
The inner rotor surface of the inner rotor IR is fixed to the stepped shaft end of the first motor hollow shaft 8 by press fitting (or shrink fitting). As shown in FIG. 4, the inner rotor IR has twelve inner rotor magnets 21 buried in the axial direction with respect to the rotor base 20 in consideration of magnetic flux formation. However, two pairs are arranged in a V-shape to show the same polarity, and are three-pole pairs.
[0027]
The stator S includes a stator tooth 41 in which a stator plate 40 made of a steel plate is laminated in the axial direction, a coil 42 wound around the stator tooth 41, a cooling refrigerant passage 43 that passes through the stator S in the axial direction, It has an inner bolt / nut 44, an outer bolt / nut 45, and a resin mold part 46. The front end of the stator S is fixed to the motor case 2 by bolts 87 via the front end plate 47 and the stator shaft 48.
[0028]
The coil 42 has 18 coils and is arranged on the circumference while repeating a six-phase coil three times as shown in FIG. The six-phase coil 42 is fed from an inverter (not shown) through a power supply connection terminal 50, a bus bar radial direction laminate 51, a power supply connector 52, and a bus bar axial direction laminate 53, for example, as shown in FIG. A composite current is applied. This composite current is a composite of a three-phase AC and a six-phase AC for driving the outer rotor OR and the inner rotor IR.
[0029]
The outer rotor surface of the outer rotor OR is fixed to the outer rotor case 62 by brazing or bonding. A front side connection case 63 is fixed to the front side of the outer rotor case 62, and a rear side connection case 64 is fixed to the back side. The second motor shaft 9 is spline-connected to the rear connection case 64. As shown in FIG. 3, twelve outer rotor magnets 61 are arranged in the outer rotor OR in an axial direction at both end positions via a space in consideration of magnetic flux formation with respect to the rotor base 60. The outer rotor magnet 61 is different from the inner rotor magnet 21 in polarity one by one and forms a six-pole pair.
[0030]
In FIG. 3, reference numerals 80 and 81 denote a pair of outer rotor support bearings that support the outer rotor 6 on the motor case 2 and the motor cover 1. 82 is an inner rotor support bearing for supporting the inner rotor IR on the motor case 2, 83 is a stator support bearing for supporting the stator S with respect to the outer rotor OR, and 84 is between the first motor hollow shaft 8 and the second motor shaft 9. It is an intermediate bearing interposed in. In FIG. 3, reference numeral 85 denotes an inner rotor resolver for detecting the rotational position of the inner rotor IR, and reference numeral 86 denotes an outer rotor resolver for detecting the rotational position of the outer rotor OR.
[0031]
[Stator structure]
FIG. 6 is a sectional view showing a stator structure in the multi-axis multilayer motor M of the first embodiment. In FIG. 6, 41 is a stator tooth, 42 is a coil, 43 is a refrigerant path, 44 is an inner bolt / nut, 45 Is an outer bolt / nut, 46 is a resin mold part, 47 is a front end plate, 48 is a stator shaft, 49 is a rear end plate, 55 is a ring-shaped member (positioning member), 70 is a front bracket, 71 is A rear bracket 72 is a stator cooling pipe.
[0032]
The stator teeth 41 are formed by axially laminating a plurality of stator plates 40 made of steel plates. A coil 42 made of a flat copper wire is wound around the outer periphery of the stator teeth 41 so as to reciprocate in the axial direction. A plurality of stator teeth 41 with the coils 42 are prepared.
[0033]
The front side bracket 70 and the rear side bracket 71 are installed at both axial ends of the stator tooth 41 with the coil 42, and the split stator tooth 41 with the coil 42 is divided into an inner bolt / nut 44 and an outer bolt / nut. It is held and fixed by clamping and clamping by 45, and the divided stator teeth 41 with the coils 42 are fitted to the ring-shaped member 55 to position them at equal pitch intervals on the circumference.
[0034]
The front end plate 47 and the rear end plate 49 are arranged outside the brackets 70 and 71, and a stator shaft 48 is fixed to the front end plate 47 by welding.
[0035]
The inner bolts / nuts 44 and the outer bolts / nuts 45 fix the entire stator tooth 41 with the coil 42 fitted to the ring-shaped member 55 to form a skeletal structure of the stator S.
[0036]
The stator cooling pipe 72 is disposed at a position between the stator teeth 41 with the coils 42 adjacent in the circumferential direction, and both ends are supported by the front bracket 70 and the rear bracket 71.
[0037]
The resin mold portion 46 is formed by placing a skeleton structure supporting the stator cooling pipe 72 in a mold having a concave shape matching the overall shape of the stator, pouring the molten resin, and filling the space with the molten resin. Is done.
[0038]
At both end positions of the stator cooling refrigerant passage 43 for cooling the coil heat of the stator teeth 41, a refrigerant distribution lid member 91 having a partition wall on the inner surface and a refrigerant U-turn lid member 95 having a partition wall on the inner surface, respectively. It is attached using snap rings 56,56. In addition, 90 is a refrigerant introduction path.
[0039]
[Stator teeth positioning structure]
FIG. 7 is a front view showing a positioning structure of divided stator teeth in the multi-axis multilayer motor M of the first embodiment, and FIG. 8 is a diagram showing a ring-shaped member and a stator tooth with a coil of the first embodiment. 7 and 8, reference numeral 41 denotes a stator tooth, 42 denotes a coil, and 55 denotes a ring-shaped member.
[0040]
The ring-shaped member 55 is a positioning member that positions the stator teeth 41 with the plurality of coils 42 on the circumference at equal pitch intervals. The ring-shaped member 55 is made of a laminated steel plate having the same thickness as the stator teeth 41, a high magnetic flux density, and a low iron loss sintered material, and the laminated steel plates are fixed by welding, bonding, or the like. Is
[0041]
The ring-shaped member 55 has fitting portions 55a of the stator teeth 41 arranged at equal pitch intervals on the circumference corresponding to the number of the stator teeth 41. Further, a notch portion 55b is provided in a portion between the fitting portions 55a, 55a of the ring-shaped member 55 so as to reduce magnetic flux leakage between the adjacent stator teeth 41, thereby making the stator tooth connecting portion 55c thin. Has formed. The space vacated by the notch 55b is used as a bolt hole for the inner bolt / nut 44 for fixing the stator.
[0042]
The stator teeth 41 are provided with a fitting portion 41a for fitting with the fitting portion 55a of the ring-shaped member 55. After the coil 42 is wound, the fitting is performed on the ring-shaped member 55, and the ring-shaped member 55 is fitted. In a state where the divided stator teeth 41 are fitted to the fitting portions 55a of the members 55, a resin mold is applied to fix the ring-shaped member 55 and the divided stator teeth 41.
[0043]
Next, the operation will be described.
[0044]
[Basic function of multi-axis multi-layer motor]
By employing a multi-axis multilayer motor M in which two magnetic lines of force, the outer rotor magnetic field lines and the inner rotor magnetic field lines, are formed with two rotors and one stator, the coil 42 and a coil inverter (not shown) can be replaced by two inner rotor IRs and an outer rotor. Can be shared for OR. Then, by applying to the single coil 42 a composite current obtained by superimposing a three-phase alternating current on the inner rotor IR and a six-phase alternating current on the outer rotor OR, the two rotors IR and OR are independently controlled. can do.
[0045]
Therefore, although it is a single multi-axis multilayer motor M in appearance, it can be used as a combination of different or similar functions of the motor function and the generator function. For example, it has a motor having a rotor and a stator, and a motor having a rotor and a stator. Compared to the case where two generators are provided, the size is significantly reduced, which is advantageous in terms of space, cost and weight, and the loss due to current (copper loss and switching loss) can be prevented by using a common coil. .
[0046]
In addition, the present invention has a high degree of freedom of selection such that not only the usage of (motor + generator) but also the usage of (motor + motor) and (generator + generator) can be performed only by the composite current control. When adopted as a drive source for a hybrid vehicle as in the embodiment, the most effective or efficient combination can be selected from these many options according to the vehicle state.
[0047]
[Positioning action of stator teeth]
When a positioning pin integrally formed with a bracket member is employed as a positioning member of the divided stator teeth as in the related art, the positioning pin is arranged in the path of the magnetic flux, which is caused by a change in the magnetic flux. The loss due to the induced current increases. In order to reduce the loss caused by the induced current, it is necessary to use a material that does not allow the induced current to flow.
[0048]
On the other hand, in the first embodiment, the positioning member of the stator tooth 41 with the coil 42 is constituted by the ring-shaped member 55 of the laminated steel sheet, like the stator tooth 41 of the laminated steel sheet. The generated induced current is less likely to flow, and the loss due to the induced current can be reduced.
[0049]
Further, the stator teeth connecting portion 55c of the ring-shaped member 55, which is the passage of the magnetic flux of the portion corresponding to each of the stator teeth 41, 41, is formed thin by forming a notch hole 55b. A structure that does not allow a certain amount of magnetic flux to pass through is provided, and the amount of leakage magnetic flux with respect to the main magnetic flux can be reduced.
[0050]
Further, the ring-shaped member 55 is a member connected in a ring shape and is connected in the circumferential direction of the divided stator teeth 41 with the coils 42, so that the divided stator teeth 41 with the coils 42 are independently arranged in the circumferential direction. As compared with the structure, the stator rigidity due to the force generated by the motor can be increased.
[0051]
Next, effects will be described.
In the stator structure of the multi-axis multilayer motor according to the first embodiment, the following effects can be obtained.
[0052]
(1) An inner rotor IR and an outer rotor OR are arranged concentrically with a stator S interposed therebetween, and the stator S is a stator with a plurality of coils 42 in which a coil 42 is wound around a stator tooth 41 formed of a laminated steel plate. In the multi-axis multilayer motor M having the teeth 41 and a positioning member for positioning the stator teeth 41 with the plurality of coils 42 on the circumference at equal pitch intervals, the positioning member is formed of a laminated steel plate, The ring-shaped member 55 is formed by using a ring-shaped member 55 having fitting portions 55a of the stator teeth 41 arranged at equal pitch intervals on the circumference and forming a thin member between the fitting portions 55a, 55a. The stator teeth set at the inner peripheral position of the stator teeth 41 and divided into the fitting portions 55a of the ring-shaped members 55 Since 41 is assembled, it is possible to achieve a reduction in the loss due to the induced current, a reduction in the amount of leakage magnetic flux with respect to the main magnetic flux, and an increase in the stator rigidity due to the force generated by the motor.
[0053]
(2) Since the ring-shaped member 55 is made of a sintered material having a high magnetic flux density and a low iron loss, the loss due to the induced current can be extremely reduced.
[0054]
(3) Since the stator teeth 41 divided into the ring-shaped members 55 are fixed by applying resin molding in a state where the divided stator teeth 41 are fitted to the fitting portions 55a of the ring-shaped members 55, With the interposition of the resin mold portion 46 that fills the space, high fixability between the ring-shaped member 55 and the divided stator teeth 41 can be achieved.
[0055]
(Second embodiment)
In the second embodiment, the basic structure is the same as that of the first embodiment. However, as shown in FIG. 9, the fitting portion 55a of the ring-shaped member 55 and the divided stator teeth 41 are connected to the caulking portion 57. This is an example of fixing by the following. Since the other configuration is the same as that of the first embodiment, illustration and description are omitted. Also, the operation is the same as that of the first embodiment, and the description is omitted.
[0056]
Next, effects will be described.
In the stator structure of the multi-axis multi-layer motor of the second embodiment, the following effects can be obtained in addition to the effects (1), (2), and (3) of the first embodiment.
[0057]
(4) Since the fitting portion 55a of the ring-shaped member 55 and the divided stator teeth 41 are fixed by caulking, the laminated steel plates are easily fixed without looseness compared to the case where the fixing of the laminated steel plates is performed by welding or bonding. be able to.
[0058]
(Third embodiment)
The third embodiment has the same basic structure as that of the first embodiment, but deforms the ring-shaped member 55 to fix the fitting portion 55a of the ring-shaped member 55 and the divided stator teeth 41. This is an example of such a case.
[0059]
That is, as shown in FIG. 10, an inner bolt / nut 44 for fixing the ring-shaped member 55 and the stator teeth 41 to the front stator support members 47 and 70 and the rear stator support members 49 and 71 is provided. A notch hole 55b used as a bolt hole is formed between the fitting portions 55a, 55a of the ring-shaped member 55, and wedge-shaped collars 58, 58 are formed between the notch hole 55b and the bolt / nut 44 from both sides. (Wedge-shaped member) is interposed, and the ring-shaped member 55 is deformed by the tightening force of the inner bolt / nut 44, thereby fixing the fitting portion 55a of the ring-shaped member 55 and the divided stator teeth 41. I do. At least one of the inner bolt / nut 44 and the wedge-shaped collar 58 is made of a non-magnetic material. Since the other configuration is the same as that of the first embodiment, illustration and description are omitted. Also, the operation is the same as that of the first embodiment, and the description is omitted.
[0060]
Next, effects will be described.
In the stator structure of the multi-axis multilayer motor according to the third embodiment, the following effects can be obtained in addition to the effects (1), (2), and (3) of the first embodiment.
[0061]
(5) An inner bolt / nut 44 for fixing the ring-shaped member 55 and the stator teeth 41 to the front-side stator support members 47 and 70 and the rear-side stator support members 49 and 71 is provided. A notch hole 55b used as a bolt hole is formed between the fitting portions 55a, 55a, and wedge-shaped collars 58, 58 are interposed between the notch hole 55b and the bolt / nut 44 from both sides. By deforming the ring-shaped member 55 by the tightening force of the inner bolt / nut 44, the fitting portion 55a of the ring-shaped member 55 and the divided stator teeth 41 are fixed. As compared with the case of welding or bonding, the ring-shaped member 55 can be easily fixed without play by utilizing the deformation of the fitting portion.
[0062]
(6) Since at least one of the inner bolt / nut 44 and the wedge-shaped collar 58 is made of a non-magnetic material, the passage of the magnetic flux between the adjacent stator teeth 41 can be cut off, thereby reducing the amount of leakage magnetic flux. be able to.
[0063]
(Fourth embodiment)
The fourth embodiment is an example in which the basic structure is the same as that of the first embodiment, but the stator teeth are connected by connecting members on the outer peripheral side.
[0064]
That is, as shown in FIG. 11, a connecting member 59 made of a non-magnetic and insulating material is provided between outer adjacent stator teeth 41, 41 not connected by the ring-shaped member 55, and a fitting portion 55a of the ring-shaped member 55 is provided. And the divided stator teeth 41 are fixed. Since the other configuration is the same as that of the first embodiment, illustration and description are omitted. Also, the operation is the same as that of the first embodiment, and the description is omitted.
[0065]
Next, effects will be described.
In the stator structure of the multi-axis multilayer motor according to the fourth embodiment, the following effects can be obtained in addition to the effects (1), (2) and (3) of the first embodiment.
[0066]
(7) A connecting member 59 made of a non-magnetic / insulating material is provided between outer adjacent stator teeth 41 that are not connected by the ring-shaped member 55, and the stator teeth 41 divided from the fitting portion 55a of the ring-shaped member 55. Are fixed, and one stator tooth 41 can be stably held without rattling by two connecting members 59 and 59 adjacent to the fitting portion 55a of the ring-shaped member 55. it can.
[0067]
(Fifth embodiment)
The fifth embodiment is an example in which the basic structure is the same as that of the fourth embodiment, but the stator teeth are connected on the outer peripheral side by connecting members which are fitted into concave and convex.
[0068]
That is, as shown in FIG. 12, the connecting members 59 are formed with convex fitting portions 59a, 59a, and the stator teeth 41 are formed with concave fitting portions 41b, 41b, and between the adjacent stator teeth 41, 41. The connecting member 59 is provided by fitting. Since the other configuration is the same as that of the first embodiment, illustration and description are omitted. Also, the operation is the same as that of the first embodiment, and the description is omitted.
[0069]
Next, effects will be described.
In the stator structure of the multi-axis multilayer motor according to the fifth embodiment, the following effects can be obtained in addition to the effects (1), (2), and (3) of the first embodiment.
[0070]
(8) Convex fitting portions 59a, 59a are formed on the connecting member 59, concave fitting portions 41b, 41b are formed on the stator teeth 41, and the connecting members 59 are provided between the adjacent stator teeth 41, 41 by fitting. With this configuration, the fixation between the adjacent stator teeth 41 by the connecting member 59 can be improved.
[0071]
(Sixth embodiment)
The fifth embodiment is an example in which the basic structure is the same as that of the fourth embodiment, but the stator teeth are connected on the outer peripheral side by a connecting member integrally having a refrigerant pipe.
[0072]
That is, as shown in FIG. 13, a connecting member 59 integrally having a stator cooling pipe 72 (refrigerant pipe) made of a non-magnetic / insulating material is provided between outer adjacent stator teeth 41 and 41 not connected by the ring-shaped member 55. The fitting portion 55a of the ring-shaped member 55 and the divided stator teeth 41, 41 are fixed. Since the other configuration is the same as that of the first embodiment, illustration and description are omitted. Also, the operation is the same as that of the first embodiment, and the description is omitted.
[0073]
Next, effects will be described.
In the stator structure of the multi-axis multi-layer motor according to the sixth embodiment, the following effects can be obtained in addition to the effects (1), (2) and (3) of the first embodiment.
[0074]
(9) A connecting member 59 integrally including a stator cooling pipe 72 made of a non-magnetic and insulating material is provided between the outer adjacent stator teeth 41, 41 not connected by the ring-shaped member 55, and a fitting portion of the ring-shaped member 55 is provided. Since the stator teeth 55a and the divided stator teeth 41, 41 are fixed, the supportability of the stator cooling pipe 72 can be improved, and a large flow path cross-sectional area of the refrigerant having high cooling performance can be secured. .
[0075]
As described above, the stator structure of the multi-axis multilayer motor according to the present invention has been described based on the first to sixth embodiments. However, the specific configuration is not limited to these embodiments. Changes and additions in design are permitted without departing from the spirit of the invention according to each claim of the scope.
[0076]
For example, in the first embodiment, the example of the multi-axis multi-layer motor applied to the hybrid drive unit has been described. Also, the stator structure of the present invention can be adopted.
[0077]
Further, in the first to sixth embodiments, the example in which the ring-shaped member is disposed at the inner circumferential position of the stator teeth has been described. For example, as shown in FIG. It may be arranged at the outer peripheral position.
[Brief description of the drawings]
FIG. 1 is a schematic overall view showing a hybrid drive unit to which a multi-axis multilayer motor having a stator structure according to a first embodiment is applied.
FIG. 2 is a vertical sectional side view showing a hybrid transmission of a hybrid drive unit to which the multi-shaft multilayer motor of the first embodiment is applied.
FIG. 3 is a vertical sectional side view showing a multi-shaft multilayer motor M to which the stator structure of the first embodiment is applied.
FIG. 4 is a partially longitudinal front view showing a multi-shaft multilayer motor M to which the stator structure of the first embodiment is applied.
FIG. 5 is an explanatory diagram showing an example of a composite current applied to a stator coil of a multi-axis multilayer motor.
FIG. 6 is a vertical sectional side view showing a stator S in the multi-shaft multilayer motor M of the first embodiment.
FIG. 7 is a front view showing a positioning structure of stator teeth divided in the multi-axis multilayer motor M of the first embodiment.
FIG. 8 is a view showing a ring-shaped member and a stator tooth with a coil in the stator tooth positioning structure of the first embodiment.
FIG. 9 is a partial front view showing a positioning structure of a stator tooth according to a second embodiment.
FIG. 10 is a partial front view and an AA cross-sectional view showing a positioning structure of a stator tooth according to a third embodiment.
FIG. 11 is a front view showing a positioning structure of a stator tooth according to a fourth embodiment.
FIG. 12 is a front view showing a positioning structure of a stator tooth according to a fifth embodiment.
FIG. 13 is a front view showing a positioning structure of a stator tooth according to a sixth embodiment.
FIG. 14 is a front view showing a positioning structure of a stator tooth in which a ring-shaped member is arranged at an outer peripheral position of the stator tooth.
[Explanation of symbols]
M Multi-axis multilayer motor S Stator IR Inner rotor OR Outer rotor 41 Stator teeth 41a Fitting portion 41b Concave fitting portion 42 Coil 43 Refrigerant path 44 Inner bolt / nut 45 Outer bolt / nut 46 Resin molded portion 47 Front end Plate (stator support member)
48 Stator shaft 49 Back end plate (stator support member)
55 Ring-shaped member 55a Fitting portion 55b Notch hole 55c Stator teeth connecting portion 57 Caulking portion 58 Wedge-shaped collar (wedge-shaped member)
59 Connecting member 59a Convex fitting part 70 Front side bracket (stator support member)
71 Back side bracket (stator support member)
72 Stator cooling pipe

Claims (9)

The inner rotor and the outer rotor are arranged concentrically across the stator,
The stator has a plurality of coiled stator teeth formed by winding coils around a stator tooth formed of laminated steel plates, and a positioning member that positions the plurality of coiled stator teeth at equal pitch intervals on a circumference. In a multi-axis multilayer motor having
As the positioning member, a ring-shaped member formed of a laminated steel sheet, having fitting portions of stator teeth arranged at equal pitch intervals on the circumference, and forming a thin member between the fitting portions,
The ring-shaped member, the inner peripheral position of the stator teeth, or set at the outer peripheral position of the stator teeth, the divided stator teeth are assembled to the fitting portion of the ring-shaped member, characterized in that the multi-shaft multilayer motor Stator structure. The stator structure of a multi-axis multilayer motor according to claim 1,
A stator structure for a multi-axis multilayer motor, wherein the ring-shaped member is made of a sintered material having a high magnetic flux density and a low iron loss. A stator structure for a multi-axis multilayer motor according to claim 1 or 2,
A stator for a multi-axis multilayer motor, wherein a resin mold is applied to fix the ring-shaped member and the divided stator teeth in a state where the divided stator teeth are fitted to the fitting portions of the ring-shaped member. Construction. A stator structure for a multi-axis multilayer motor according to claim 1 or 2,
A stator structure for a multi-axis multilayer motor, wherein a fitting portion of the ring-shaped member and the divided stator teeth are fixed by caulking. A stator structure for a multi-axis multilayer motor according to claim 1 or 2,
Providing a bolt and nut for fixing the ring-shaped member and the stator teeth to the stator support member,
A bolt hole is formed between each fitting portion of the ring-shaped member, a wedge-shaped member is interposed between the bolt hole and the bolt / nut, and the ring-shaped member is deformed by a tightening force of the bolt / nut. Thus, the stator structure of the multi-axis multilayer motor, wherein the fitting portion of the ring-shaped member and the divided stator teeth are fixed. The stator structure of a multi-axis multilayer motor according to claim 5,
A stator structure for a multi-axis multilayer motor, wherein the bolt / nut and / or the wedge-shaped member or both are made of a non-magnetic material. A stator structure for a multi-axis multilayer motor according to claim 1 or 2,
A connecting member made of a non-magnetic / insulating material is provided between adjacent stator teeth on the side not connected by the ring-shaped member, and the fitting portion of the ring-shaped member and the divided stator teeth are fixed. Stator structure of multi-axis motor. The stator structure of a multi-axis multilayer motor according to claim 7,
Forming a convex fitting portion on one of the connecting member and the stator teeth, forming a concave fitting portion on the other, and providing the connecting member between adjacent stator teeth by fitting. Stator structure. A stator structure for a multi-axis multilayer motor according to claim 1 or 2,
A connecting member integrally having a refrigerant pipe made of a non-magnetic and insulating material is provided between adjacent stator teeth on the side not connected by the ring-shaped member, and the fitting portion of the ring-shaped member and the divided stator teeth are fixed. A stator structure of a multi-axis multilayer motor, characterized in that:

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