JP3885755B2 - Stator structure of multi-axis multilayer motor - Google Patents

Description

[0001]
BACKGROUND 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 multilayer motor in which an inner rotor and an outer rotor are arranged concentrically with a stator interposed therebetween, a stator tooth with a plurality of coils in which a coil is wound around a stator tooth composed of laminated steel plates, A front side bracket member and a back side bracket member which are arranged on both end surface portions of a plurality of stator teeth with coils, position and support the stator teeth with coils at equal pitch intervals on the circumference, and the divided coils And a resin mold portion made of a resin having insulation and heat resistance that fills the gap between the attached stator teeth (for example, Patent Document 1).
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-169483.
[0004]
[Problems to be solved by the invention]
However, in the conventional multi-axis multilayer motor, since the axial bolts, washers, and bracket members for fastening the divided stator teeth with the coil are made of a magnetic material, the bracket members and shafts that hold both ends of the stator teeth are used. There was a problem that a loop current was generated through the directional bolt, and the efficiency of the motor deteriorated. In addition, when a non-magnetic axial bolt is used, there is a problem that it cannot withstand the axial force because its strength is relatively weak.
[0005]
The present invention has been made paying attention to the above problems, and can improve the motor efficiency by interrupting the loop current, reduce the weight of the motor, and the layout of the stator.The degree of freedom increases, and the cooling area is increased by expanding the flow path area of the refrigerant path.It is an object of the present invention to provide a stator structure for a multi-axis multilayer motor that can be used.
[0006]
[Means for Solving the Problems]
  In order to solve the above problems, in the present invention,
  An inner rotor and an outer rotor are arranged concentrically with a stator interposed therebetween, and the stator includes a plurality of stator teeth with coils, a positioning member for the divided stator teeth with coils, and a resin mold portion. In multilayer motors,
  As a member for fastening and fixing the divided stator teeth with a coil to a positioning member, a non-conductive high-strength fiber with tension is used.,
  The whole stator teeth with a coil divided by the tension of the high-strength fiber is fixed, constitutes a skeleton structure of the stator, and a stator cooling pipe is disposed at a position between the circumferentially adjacent stator teeth with a coil,
  The resin mold part is formed by placing a skeletal structure supporting the stator cooling pipe in a mold having a concave shape that matches the overall shape of the stator, pouring the molten resin, and filling the space with the molten resin.It was.
[0007]
【The invention's effect】
  Therefore, in the stator structure of the multi-axis multilayer motor of the present invention, when the divided stator teeth with a coil are fastened and fixed to the positioning member, non-conductive high-strength fibers to which tension is applied are used. The motor efficiency can be improved by interrupting the loop current,Since the density of the fiber is lower than that of the metal, the weight of the motor can be reduced. In addition, high-strength fibers require less space for design than axial bolts, increasing the degree of freedom in layout and increasing the cooling area by expanding the cross-sectional area of the refrigerant path..
[0008]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for realizing a stator structure of a multi-shaft multilayer motor according to the present invention will be described based on first to fourth embodiments 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 multilayer 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 planetary gear train, D Is a drive output mechanism, 1 is a motor cover, 2 is a motor case, 3 is a gear housing, and 4 is a front cover.
[0011]
The engine E is a main power source of the hybrid drive unit, and the engine output shaft 5 and the second ring gear R2 of the Ravigneaux type planetary gear train G are connected through a rotation fluctuation absorbing damper 6 and a multi-plate clutch 7. ing.
[0012]
The multi-axis multilayer motor M is a sub-power source having two motor generator functions although it is one motor in appearance. The multi-axis multilayer motor M is fixed to the motor case 2 and includes 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, and the stator The outer rotor OR, which is arranged outside the S and embedded with permanent magnets, is arranged in three layers on the same axis. The first motor hollow shaft 8 fixed to the inner rotor IR is connected to the first sun gear S1 of the Ravigneaux type compound planetary gear train G, and the second motor shaft 9 fixed to the outer rotor OR is the Ravigneaux type compound planetary gear. It is connected to the second sun gear S2 of the row G.
[0013]
The Ravigneaux type planetary gear train G is a hybrid transmission having a continuously variable transmission function that changes the gear ratio steplessly by controlling two motor rotation speeds. The Ravigneaux type planetary gear train G includes a common carrier C that supports the first pinion P1 and the 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. It has five rotating elements, 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 multi-plate 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 → second counter gear 13 → drive gear 14 → differential 15 and are transmitted from the drive shafts 16L and 16R to the drive wheels (not shown). The
[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 the second sun gear S2. And the second motor shaft 9 are connected, and the output gear 11 is connected to the common carrier C.
[0016]
[Configuration of hybrid transmission]
FIG. 2 is a longitudinal sectional view showing the hybrid transmission. In FIG. 2, 2 is a motor case, 3 is a gear housing, and 4 is a front cover. A Ravigneaux type planetary gear train G and a drive output mechanism D are arranged in a gear chamber 30 surrounded by them.
[0017]
The second ring gear R2 of the Ravigneaux type planetary gear train G is driven to rotate from the engine E when the multi-plate clutch 7 is engaged via 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 splined to the first sun gear S1 of the Ravigneaux type planetary gear train G, and the first torque and the first torque are transmitted from the inner rotor IR of the multi-axis multilayer motor M according to the determined motor operating point. The first rotation speed is input.
[0019]
A second motor shaft 9 is splined to the second sun gear S2 of the Ravigneaux type planetary gear train G, and the second torque and the second torque are output from the outer rotor OR of the multi-axis multilayer motor M according to the 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 planetary gear train G and the gear housing 3, and when the multi-plate brake 10 is engaged at the time of starting or the like, the first ring gear R1 is Stop.
[0021]
An output gear 11 that is rotatably supported by a stator shaft 48 via a bearing is splined to the common carrier C of the Ravigneaux type planetary gear train G.
[0022]
The drive output mechanism D includes a first counter gear 12 that meshes with the output gear 11, a second counter gear 13 provided on the shaft portion of the first counter gear 12, and a drive gear 14 that meshes with the second counter gear 13. And have. The final reduction ratio is determined by the ratio of the number of teeth of the second counter gear 13 and the drive gear 14.
[0023]
A fastening pressure is supplied to the clutch piston 33 of the multi-plate clutch 7 by a clutch pressure oil passage 34 formed in the front cover 4. A fastening pressure is supplied to the 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, the clutch piston 33 is disposed at an inner circumferential position, and the brake piston 35 is disposed at an outer circumferential position thereof.
[0024]
A shaft center oil passage 37 is formed in the transmission input shaft 31, and lubricating oil is supplied to the shaft center oil passage 37 through a lubricant oil passage 38 formed in the front cover 4. The
[0025]
[Configuration of multi-axis multilayer motor]
FIG. 3 is a longitudinal 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 is a view of the stator of the first embodiment as viewed from the back side, and FIG. 6 is an explanatory view 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 constituted by an inner rotor IR, a stator S, and an outer rotor OR is disposed in a motor chamber 17 surrounded by them. Yes.
[0026]
The inner rotor surface of the inner rotor IR is fixed by press-fitting (or shrink fitting) to the stepped shaft end portion of the first motor hollow shaft 8. As shown in FIG. 4, twelve inner rotor magnets 21 are embedded in the inner rotor IR in the axial direction with respect to the rotor base 20 in consideration of magnetic flux formation. However, the two are arranged in a V-shape to show the same polarity and are in a three-pole pair.
[0027]
The stator S includes a stator tooth 41 in which a stator plate 40 made of steel is laminated in the axial direction, a coil 42 wound around the stator tooth 41, a cooling refrigerant path 43 that passes through the stator S in the axial direction, The inner side high strength fiber 44, the outer side high strength fiber 45, and the resin mold part 46 are comprised. The front end portion of the stator S is fixed to the motor case 2 with 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. Then, the six-phase coil 42 is connected to the six-phase coil 42 through a power supply connection terminal 50, a bus bar radial stack 51, a power connector 52, and a bus bar axial stack 53 from an inverter (not shown), for example, as shown in FIG. A composite current is applied. This composite current is a combination of a three-phase alternating current and a six-phase alternating current for driving the outer rotor OR and the inner rotor IR.
[0029]
The outer rotor OR has an outer cylindrical surface fixed to the outer rotor case 62 by brazing or bonding. And the front side connection case 63 is being fixed to the front side of the outer rotor case 62, and the back side connection case 64 is being fixed to the back side. The second motor shaft 9 is splined to the back side connection case 64. As shown in FIG. 3, twelve outer rotor magnets 61 are arranged in the outer rotor OR in the axial direction at both end positions with a space between them in consideration of magnetic flux formation. Unlike the inner rotor magnet 21, the outer rotor magnet 61 is different 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 to the motor case 2 and the motor cover 1. 82 is an inner rotor support bearing that supports the inner rotor IR to the motor case 2, 83 is a stator support bearing that supports 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. This is an intermediate bearing. In FIG. 3, 85 is an inner rotor resolver that detects the rotational position of the inner rotor IR, and 86 is an outer rotor resolver that detects the rotational position of the outer rotor OR.
[0031]
[Stator structure]
FIG. 7 is a cross-sectional view showing a stator structure in the multi-axis multilayer motor M of the first embodiment. In FIG. 7, 41 is a stator tooth, 43 is a refrigerant path, 44 is an inner side high strength fiber (high strength fiber), 45 is an outer side high strength fiber (high strength fiber), 46 is a resin mold part, 47 is a front side end plate (front side positioning member), 49 is a back side end plate (back side positioning member), and 70 is a front side bracket. (Front-side positioning member), 71 is a back-side bracket (back-side positioning member), 72 is a stator cooling pipe, 88 is a knot (fixed end), and 89 is a tightening member.
[0032]
The stator teeth 41 are configured by stacking a stator plate 40 made of a number of steel plates in the axial direction. A coil 42 made of 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 coils 42 are prepared.
[0033]
The front side bracket 70 and the back side bracket 71 are installed at both axial end positions of the stator tooth 41 with the coil 42. The divided stator teeth 41 with the coil 42 and the brackets 70, 71 are separated by positioning pins 55. They are positioned so as to be arranged at an equal pitch on the circumference around the motor rotation axis.
[0034]
The front end plate 47 and the rear end plate 49 are disposed outside the brackets 70 and 71, and a stator shaft 48 is fixed to the front end plate 47 by welding.
[0035]
The inner side high strength fiber 44 and the outer side high strength fiber 45 are inserted through fiber holes formed in the front side positioning members 47 and 70 and the back side positioning members 49 and 71, with the knot 88 as a fixed end, and tightened. The raising member 89 is turned and tightened, and the entire stator teeth 41 with the coil 42 divided by the tension (tensile force) generated by the tightening is fixed, and the skeleton structure of the stator S is configured.
[0036]
The stator cooling pipe 72 is disposed at a position between the stator teeth 41 with the coil 42 adjacent to each other in the circumferential direction, and both ends are supported by the front side bracket 70 and the back side bracket 71.
[0037]
The resin mold portion 46 is formed by placing a skeletal structure supporting the stator cooling pipe 72 in a mold having a concave shape that matches the overall shape of the stator, pouring the molten resin, and filling the space with the molten resin. Is done.
[0038]
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 are provided at both ends of the stator cooling refrigerant path 43 for cooling the coil heat generation of the stator teeth 41, respectively. The snap rings 56 and 56 are used for attachment. Reference numeral 90 denotes a refrigerant introduction path.
[0039]
[Stator teeth tightening structure]
FIG. 8 is a view in the direction of arrow A in FIG. 5 showing the stator teeth tightening structure divided in the multi-axis multilayer motor M of the first embodiment. In FIG. 8, 45 is an outer-side high-strength fiber, 47 and 70 are Front side positioning members, 49 and 71 are back side positioning members, 88 is a knot, and 89 is a tightening member.
[0040]
  Non-conductive inner high-strength fibers 44 and outer high-strength fibers 45 to which tension is applied are used as members for fastening and fixing the divided stator teeth 41 with the coils 42 to the positioning members.
Here, the high strength fiber means, for example, para-aramid fiber. In the case of this para-aramid fiber, it is non-conductive and has a tensile strength of about 5 times that of steel of the same weight, in addition to light weight (specific gravity is about 1/5 that of steel), heat resistance ( (Maintains characteristics from -160 ° C to 200 ° C), has the advantages of high durability, high vibration damping, and low elongation.
[0041]
As positioning members for positioning the divided stator teeth 41 with the coil 42, front-side positioning members 47, 70 and back-side positioning members 49, 71 are arranged on both end surface portions, and the high-strength fibers 44, 45 are arranged around the periphery. It is set across the axial direction at a position between the stator teeth 41 with the coil 42 and the stator teeth 41 with the coil 42 adjacent to each other in the direction.
[0042]
Fiber holes are opened in the front side positioning members 47 and 70 and the back side positioning members 49 and 71 by a corresponding positional relationship, and one end portion is a knot 88 (fixed end) having a diameter larger than the fiber hole diameter. The high-strength fibers 44 and 45 provided with the tightening members 89 for applying tension to the end portions are prepared by the number of fiber holes set in one positioning member 47 and 70, and the plurality of high-strength fibers 44 and 45 are prepared. Is inserted and set in a pair of fiber holes opened in the front side positioning members 47 and 70 and the back side positioning members 49 and 71.
[0043]
Here, as the tightening member 89, for example, as shown in FIG. 8 (b), a fixing screw member 89a in which a high-strength fiber 45 is inserted through the center and a male screw is formed on the outer periphery, and the fixing screw member A female screw that is screwed with 89a is formed on the inner surface, and a high-strength fiber 45 is formed by a movable screw member 89b that is inserted through the center portion and has an end portion fixed thereto. In the case of the tightening member 89, the axial length of the tightening member 89 is increased by rotating the movable screw member 89b in the direction of loosening the screw, and follows the change in the axial length of the tightening member 89. Tension can be applied to the high-strength fibers 45.
[0044]
Next, the operation will be described.
[0045]
[Basic functions of multi-axis multilayer motor]
By adopting a multi-shaft multilayer motor M in which two magnetic lines of outer rotor magnetic field lines and inner rotor magnetic field lines are formed with two rotors and one stator, the coil 42 and a coil inverter (not shown) are replaced with two inner rotors IR and outer rotors. Can be shared for OR. Then, the two rotors IR and OR are controlled independently by applying, to one coil 42, a composite current obtained by superimposing the current due to the three-phase alternating current for the inner rotor IR and the current due to the six-phase alternating current for the outer rotor OR. can do.
[0046]
Thus, in appearance, it is a single-axis multi-layer motor M, but the motor function and the generator function can be used as a combination of different or similar functions. For example, the motor has a rotor and a stator, and has a rotor and a stator. Compared to the case where two generators are provided, it is much more compact and is advantageous in terms of space, cost, and weight, and it can prevent loss due to current (copper loss, switching loss) by sharing coils. .
[0047]
Moreover, it has a high degree of freedom in selection, such as using not only (motor + generator) but also (motor + motor) or (generator + generator) only by composite current control. When employed 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.
[0048]
[Stator teeth tightening action]
When axial bolts are used as fastening members for fastening the divided stator teeth, as in the prior art, the axial bolts, washers and bracket members are made of metal (magnetic material), so both ends of the stator teeth are pressed. A loop current is generated through the bracket member and the axial bolt, and the efficiency of the motor is deteriorated. In addition, when a non-magnetic axial bolt such as a ceramic bolt is used, the strength is relatively weak, so that it cannot withstand the axial force.
[0049]
In contrast, in the first embodiment, as a member for fastening and fixing the divided stator teeth 41 with the coil 42 to the positioning member, a non-conductive inner member provided with tension is used instead of a conventional metal axial bolt. Since the side high-strength fiber 44 and the outer side high-strength fiber 45 are used, the motor efficiency can be improved by cutting off the loop current, and the weight of the motor is reduced because the density of the fiber is lower than that of the metal. be able to. In addition, the high-strength fibers 44 and 45 require less design space than the axial bolts, increasing the degree of freedom in layout, and further increasing the cooling area by expanding the cross-sectional area of the refrigerant path 43. It can be taken big.
[0050]
Next, the effect will be described.
The effects listed below can be obtained in the stator structure of the multi-axis multilayer motor of the first embodiment.
[0051]
(1) An inner rotor IR and an outer rotor OR are arranged concentrically with the stator S in between, and the stator S is a stator with a plurality of coils 42 in which coils 42 are wound around a stator tooth 41 composed of laminated steel plates. Teeth 41, positioning members for positioning and supporting the stator teeth 41 with the coils 42 at equal pitch intervals on the circumference, and disposed at least on one end surface of the stator teeth 41 with the coils 42; In the multi-axis multilayer motor M having a resin mold portion 46 made of an insulating and heat-resistant resin that fills the gaps between the stator teeth 41 with coils 42, the divided stator teeth 41 with coils 42 are used as positioning members. As a member to be tightened and fixed, non-conductive Since the inner high-strength fiber 44 and the outer high-strength fiber 45 are used, the motor efficiency can be improved by interrupting the loop current, and the motor weight can be reduced and the layout flexibility of the stator S can be increased. Can do.
[0052]
(2) As positioning members for positioning the divided stator teeth 41 with the coil 42, front side positioning members 47 and 70 and back side positioning members 49 and 71 are arranged on both end surfaces, and the high strength fibers 44 and 45 are arranged. Is set across the axial direction at a position between the stator teeth 41 with the coil 42 and the stator teeth 41 with the coil 42 adjacent to each other in the circumferential direction, so that the stator teeth 41 can be tightened from both ends. Thus, the positioning and fixing of the divided stator teeth 41 with the coil 42 can be performed.
[0053]
(3) Fiber holes are opened in the front-side positioning members 47 and 70 and back-side positioning members 49 and 71 in a corresponding positional relationship, and one end portion is a knot 88 having a diameter larger than the fiber hole diameter, and the other end High-strength fibers 44 and 45 provided with a tightening member 89 for applying tension to the portion are prepared for the number of fiber holes set in one positioning member 47 and 70, and the plurality of high-strength fibers 44 and 45 are prepared. Since the front side positioning members 47 and 70 and the back side positioning members 49 and 71 are set to be inserted into the pair of fiber holes, the bolt holes can be changed to fiber holes without changing the conventional motor design using axial bolts. It is possible to easily employ the high strength fibers 44 and 45.
[0054]
(Second embodiment)
The basic structure of the second embodiment is the same as that of the first embodiment, but the stator teeth are tightened by preparing only one inner side high-strength fiber 44 and one outer side high-strength fiber 45. This is an example.
[0055]
That is, as shown in FIG. 9, high-strength fibers 44 and 45 provided with a fixed screw member 89a of a tightening member 89 provided on one end side and a movable screw member 89b provided on the other end side of both ends. Are prepared, and the respective high-strength fibers 44 and 45 are sewn while avoiding the divided stator teeth 41 with the coils 42 and the front-side positioning members 47 and 70 and the rear-side positioning members at both ends. Insertion is set in 45 fiber holes. Since other configurations are the same as those of the first embodiment, illustration and description thereof are omitted.
[0056]
The operation will be described. When the stator teeth 41 are tightened by the single inner-side high-strength fiber 44, the front-side positioning members 47 and 70 at both ends are sewn so as to avoid the divided stator teeth 41 with the coils 42. One inner side high-strength fiber 44 is inserted and set in the fiber hole of the back side positioning member 45, and finally, a fixed screw member 89a of a tightening member 89 provided on one end side and a movable screw provided on the other end side A tension is applied to the inner side high-strength fiber 44 by rotating the member 89b in a tightening direction so as to increase the screwing amount. And it is performed similarly about the fastening method of the stator teeth 41 by the outer side high strength fiber 45. Since other operations are the same as those in the first embodiment, description thereof will be omitted.
[0057]
Next, the effect will be described.
In the stator structure of the multi-axis multilayer motor of the second embodiment, the following effects can be obtained in addition to the effects (1) and (2) of the first embodiment.
[0058]
(4) Fiber holes are opened in the front side positioning members 47 and 70 and the back side positioning members 49 and 71 according to the corresponding positional relationship, and a fixing screw for the tightening member 89 provided on one end side of both ends. Only one high-strength fiber 44, 45 provided with a member 89a and a movable screw member 89b provided on the other end side is prepared, and the one high-strength fiber 44, 45 is divided into each coil 42. Since the fiber holes of the front-side positioning members 47 and 70 and the rear-side positioning member 45 at both ends are set so as to sew while avoiding the attached stator teeth 41, the bolt holes can be formed without changing the conventional motor design using axial bolts. High-strength fibers 44 and 45 can be easily employed by using the fiber hole as a fiber hole, and the number of high-strength fibers 44 and 45 and the number of tightening members 89 can be reduced. It is possible to reduce costs and reduce the number of work steps for applying tension.
[0059]
(Third embodiment)
In the third embodiment, as shown in FIGS. 10 and 11, positioning members 47 and 70 are arranged only on one end surface portion, and the intermediate position high-strength fiber 100 is positioned with respect to the positioning members 47 and 70. This is an example in which the teeth 41 are set in an annular shape so as to be wound. Since other configurations are the same as those of the first embodiment, illustration and description thereof are omitted.
[0060]
The operation will be described. When the stator teeth 41 with coils 42 divided by the intermediate-position high-strength fibers 100 are tightened, the stator teeth 41 with coils 42 are wound around the intermediate-position high-strength fibers 100 as shown in FIG. The fixed screw member 89a of the tightening member 89 provided on one end side and the movable screw member 89b provided on the other end side of both ends of the intermediate-position high-strength fiber 100 are screwed. Tightening is applied to the intermediate-position high-strength fiber 100 by tightening so that the total amount increases. Since other operations are the same as those in the first embodiment, description thereof will be omitted.
[0061]
Next, the effect will be described.
In the stator structure of the multi-axis multilayer motor of the third embodiment, in addition to the effect (1) of the first embodiment, the following effects can be obtained.
[0062]
(5) As the positioning member for positioning the divided stator teeth 41 with the coil 42, the front-side positioning members 47 and 70 are disposed only on one end surface portion, and the intermediate-position high-strength fiber 100 is connected to the front-side positioning member 47, Since the stator teeth 41 with the coils 42 are annularly set so as to wind the coils 42 with respect to the motor 70, the weight of the motor can be made lighter than in the first and second embodiments by eliminating the rear side positioning members 49 and 71. In addition, since the degree of freedom in layout is increased from that in the first and second embodiments, the stator S can be made more compact and the cooling area can be secured large.
[0063]
(Fourth embodiment)
In the fourth embodiment, as shown in FIGS. 12 and 13, the front side positioning members 47 and 70 and the back side positioning members 49 and 71 are arranged, and the axial teeth 41a and 41b are provided in the stator teeth 41 with the coils 42, respectively. In this example, the inner side high strength fiber 44 and the outer side high strength fiber 45 are set in the axial direction at the positions of the axial holes 41a and 41b. Since other configurations are the same as those of the first embodiment, illustration and description thereof are omitted.
[0064]
The operation will be described. The stator teeth 41 are formed in advance through the axial holes 41a and 41b. When fastening the divided stator teeth 41 with the coils 42 by the inner side high strength fibers 44 and the outer side high strength fibers 45, as shown in FIGS. 12 and 13, the inner side high strength fibers 44 and The outer high strength fiber 45 is inserted into the axial holes 41a and 41b, and tension is applied to both the high strength fibers 44 and 45 in the same manner as in the first embodiment. Since other operations are the same as those in the first embodiment, description thereof will be omitted.
[0065]
Next, the effect will be described.
In the stator structure of the multi-shaft multilayer motor of the fourth embodiment, the following effects can be obtained in addition to the effect (1) of the first embodiment.
[0066]
(6) Front positioning members 47 and 70 and rear positioning members 49 and 71 are arranged as positioning members for positioning the divided stator teeth 41 with coils 42, and axial holes are provided in the stator teeth 41 with coils 42. Since the inner side high strength fiber 44 and the outer side high strength fiber 45 are set across the axial direction at the positions of the axial holes 41a and 41b, respectively, the first embodiment to the first embodiment are formed. As in the third embodiment, there is no substance that can become a thermal resistance at the surface position of the coil 42, which is effective for improving the cooling performance. In addition, since the high-strength fibers do not exist at positions between the adjacent stator teeth 41 with the coils 42, the flow passage cross-sectional area of the refrigerant passage 43 is enlarged, which is compared with the first to third embodiments. In addition, the cooling area can be further increased.
[0067]
As mentioned above, although the stator structure of the multi-axis multilayer motor of this invention has been demonstrated based on 1st Example-4th Example, it is not restricted to these Examples about a concrete structure, Claim Design changes and additions are permitted without departing from the spirit of the invention according to each claim of the scope.
[0068]
For example, in the first embodiment, an example of a multi-axis multi-layer motor applied to a hybrid drive unit has been shown. However, for a multi-axis multi-layer motor installed alone or a multi-axis multi-layer motor applied to another system Also, the stator structure of the present invention can be adopted.
[0069]
In the fourth embodiment, the example in which the front-side positioning member and the rear-side positioning member are arranged as the positioning members for positioning the divided stator teeth with coil is shown, but the present invention is also applied to an example in which only the front-side positioning member is arranged. be able to. In this case, high-strength fibers may be set for the respective axial holes of the stator teeth, and the two axial holes of the respective stator teeth are wound in the radial direction as in the third embodiment. A high strength fiber may be set in an annular shape.
[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 of a first embodiment is applied.
FIG. 2 is a longitudinal side view showing a hybrid transmission of a hybrid drive unit to which the multi-axis multilayer motor of the first embodiment is applied.
FIG. 3 is a longitudinal side view showing a multi-axis 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-axis multilayer motor M to which the stator structure of the first embodiment is applied.
FIG. 5 is a view of a multi-axis multilayer motor M to which the stator structure of the first embodiment is applied as viewed from the back side of the stator.
FIG. 6 is an explanatory diagram showing an example of a composite current applied to a stator coil of a multi-axis multilayer motor.
FIG. 7 is a longitudinal sectional side view showing a stator S in the multi-axis multilayer motor M of the first embodiment.
FIG. 8 is a view showing a stator teeth tightening structure divided in the multi-axis multilayer motor M of the first embodiment.
FIG. 9 is a view showing a stator teeth tightening structure divided in the multi-axis multilayer motor M of the second embodiment.
FIG. 10 is a front view showing stator teeth of a stator S in a multi-axis multilayer motor M of a third embodiment.
FIG. 11 is a diagram showing a stator teeth tightening structure divided in a multi-axis multilayer motor M of a third embodiment.
FIG. 12 is a front view showing stator teeth of a stator S in a multi-axis multilayer motor M of a fourth embodiment.
FIG. 13 is a view showing a stator teeth tightening structure divided in a multi-axis multilayer motor M of a fourth embodiment.
[Explanation of symbols]
M Double-axis multilayer motor
S stator
IR inner rotor
OR outer rotor
41 Stator Teeth
41a, 41b Axial hole
42 coils
43 Refrigerant path
44 Inner side high strength fiber (high strength fiber)
45 Outer side high strength fiber (high strength fiber)
46 Resin mold part
47 Front end plate (front positioning member)
48 Stator shaft
49 Back side end plate (Back side positioning member)
70 Front bracket (front positioning member)
71 Rear bracket (rear positioning member)
72 Stator cooling pipe
88 Knot (fixed end)
89 Fastening members
100 Middle position high strength fiber (high strength fiber)

Claims (6)

An inner rotor and an outer rotor are arranged concentrically around the stator,
The stator is disposed on at least one end surface portion of the plurality of stator teeth with coils, in which coils are wound around stator teeth formed of laminated steel plates, and each stator teeth with coils is arranged on the circumference. In a multi-axis multi-layer motor having a positioning member for positioning and supporting at equal pitch intervals, and a resin mold portion made of resin having insulation and heat resistance that fills the gap between the divided stator teeth with coil,
As a member for fastening and fixing the divided stator teeth with a coil to a positioning member, a high-strength fiber due to non-conductivity to which tension is applied ,
The whole stator teeth with a coil divided by the tension of the high-strength fiber is fixed, constitutes a skeleton structure of the stator, and a stator cooling pipe is disposed at a position between the circumferentially adjacent stator teeth with a coil,
The resin mold part is formed by placing a skeletal structure supporting the stator cooling pipe in a mold having a concave shape that matches the overall shape of the stator, pouring the molten resin, and filling the space with the molten resin. A stator structure of a multi-axis multilayer motor characterized by the above. In the stator structure of the multi-axis multilayer motor according to claim 1,
As a positioning member for positioning the divided stator teeth with coil, a front side positioning member and a back side positioning member are arranged on both end surfaces,
A stator structure of a multi-axis multilayer motor, wherein the high-strength fibers are set in the axial direction at positions between the stator teeth with coils and the stator teeth with coils adjacent in the circumferential direction. In the stator structure of the multi-axis multilayer motor according to claim 2,
A fiber hole is opened in the front side positioning member and the back side positioning member by a positional relationship corresponding to each other,
One end is a fixed end having a diameter larger than the fiber hole diameter, and high-strength fibers provided with a tightening member for applying tension to the other end are prepared as many as the number of fiber holes set in one positioning member,
A stator structure of a multi-axis multilayer motor, wherein the plurality of high-strength fibers are set to be inserted into a pair of fiber holes opened in two positioning members. In the stator structure of the multi-axis multilayer motor according to claim 2,
A fiber hole is opened in the front side positioning member and the back side positioning member by a positional relationship corresponding to each other,
Prepare only one high-strength fiber provided with a fixed screw member of a tightening member provided on one end side and a movable screw member provided on the other end side of both ends,
A stator structure for a multi-axis multilayer motor, wherein the single high-strength fiber is inserted and set in the fiber holes of the positioning members at both ends so as to sew while avoiding the divided stator teeth with coils. In the stator structure of the multi-axis multilayer motor according to claim 1,
As a positioning member for positioning the divided stator teeth with coil, a positioning member is arranged only at one end surface portion,
A stator structure for a multi-axis multilayer motor, wherein the high-strength fibers are set in an annular shape so as to wind stator teeth with coils around a positioning member. In the stator structure of the multi-axis multilayer motor according to claim 1,
As a positioning member for positioning the divided stator teeth with coil, a positioning member is disposed on at least one end surface portion,
Forming the stator teeth with each coil through an axial hole,
A stator structure of a multi-axis multilayer motor, wherein the high-strength fibers are set in the axial direction at the positions of the axial holes.

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