JP2010148230A - Toroidal winding motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a toroidal winding motor in which a motor is miniaturized, and winding and a stator are cooled. <P>SOLUTION: The toroidal winding motor 23 includes a rotor 22, the stator 21 arranged along a periphery of the rotor and winding 17 wound to the stator in a toroidal shape. The rotor is rotated by circulating current to winding in the toroidal winding motor. The stator includes a partitioning part 31 partitioning windings, and an oil supply member 40 supplying oil to a plurality of slots 28B partitioned and formed by the partitioning part. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a toroidal winding motor.

2. Description of the Related Art Conventionally, a motor that is supported rotatably around an axis and has a rotor on which permanent magnets are disposed, and a stator that is disposed opposite to the periphery of the rotor and on which coils (windings) are wound. There is known a vehicle motor unit having the following.
Further, distributed winding, concentrated winding, and toroidal winding are known as winding methods of the coil.

  When the coil is wound around the stator by distributed winding, there are many overlapping portions of the coil, and the height of the crossing portion that spans between the slots of the stator becomes high and becomes long in the axial direction. In the distributed winding, the q-axis magnetic flux distribution in the stator core becomes uniform, and torque ripple and vibration can be reduced.

  Further, when the coil is wound around the stator by concentrated winding, the height of the transition portion can be kept low, but the q-axis magnetic flux distribution becomes non-uniform and vibration cannot be reduced.

On the other hand, when the coil is wound around the stator by toroidal winding, the height of the transition portion can be suppressed to substantially the same height as the concentrated winding, and the q-axis magnetic flux distribution can be made uniform as in the distributed winding. However, in the toroidal winding, since the coil is also disposed on the outer peripheral side of the stator, the contact area between the outer peripheral surface of the stator and the housing is reduced, and there is a problem that heat generated from the coil and the stator is difficult to dissipate.
Therefore, a technique that can cool the coil and the stator even when the coil is wound around the stator by toroidal winding is disclosed (see, for example, Patent Document 1).
Special table 2003-524493

  By the way, in patent document 1 mentioned above, since the housing itself is made into refrigerant | coolant piping, it is necessary to provide a partition in the clearance gap (air gap around a rotor) between a rotor and a stator. That is, there is a problem that the gap must be increased and the motor becomes larger. Further, there is a problem that a strong sealing structure must be provided between the partition wall and the housing so that the refrigerant does not leak to the rotor side.

  Therefore, the present invention has been made in view of the above circumstances, and provides a toroidal winding motor that can reduce the size of the motor and can cool the winding and the stator.

  In order to solve the above problems, the invention described in claim 1 includes a rotor (for example, the rotor 22 in the embodiment) and a stator (for example, the stator 21 in the embodiment) provided along the outer periphery of the rotor. A toroidal winding motor that rotates the rotor by passing a current through the winding (for example, the coil 17 in the embodiment) wound around the stator in a toroidal shape. (For example, in the motor 23 in the embodiment), the stator has a partition portion (for example, the partition portion 31 in the embodiment) that partitions the windings, and a plurality of slots (partitions formed by the partition portion ( For example, an oil supply member (for example, oil supply members 40 and 50 in the embodiment) capable of supplying oil is provided in the outer slot 28B in the embodiment. It is characterized in that.

  According to a second aspect of the present invention, the oil supply member is provided in a housing that can accommodate the stator and the rotor (for example, the motor housing 11 in the embodiment), and the oil supply member in the housing is provided. An oil ejection hole (for example, the oil ejection hole 44 in the embodiment) is formed at a position, and the oil ejection hole is formed at a position corresponding to each of the windings, and the oil ejection hole is formed in the winding. A plurality of oils are formed along the axial direction so that oil is supplied.

  The invention described in claim 3 is characterized in that the oil supply member is provided in the housing, and the stator is press-fitted and fixed in the housing.

  According to a fourth aspect of the present invention, the oil supply member is provided in a housing capable of accommodating the stator and the rotor, and the oil supply member has an oil injection hole (for example, the oil injection hole 53 in the embodiment). The oil ejection holes are formed at positions corresponding to the respective windings, and a plurality of the oil ejection holes are formed along the axial direction so that oil is supplied to the windings. It is characterized by being.

  The invention described in claim 5 is characterized in that the oil supply member and the outer peripheral surface of the stator are in contact with each other.

  The invention described in claim 6 is characterized in that the oil supply member is provided in the housing, and the stator is press-fitted and fixed to the oil supply member.

  The invention described in claim 7 is characterized in that a plurality of the oil ejection holes are formed so as to supply oil to both side surfaces of the winding.

  The invention described in claim 8 is characterized in that the stator includes an oil receiving member (for example, the oil receiving member 33 in the embodiment) on an inner peripheral portion.

  The invention described in claim 9 is characterized in that the oil receiving member is sandwiched between teeth (for example, the teeth 32 in the embodiment) formed on the inner periphery of the stator.

According to the first aspect of the present invention, since the oil supply member is provided, the partition wall is not provided between the rotor and the stator as in the conventional case where the housing is used as the refrigerant flow path. The gap distance can be shortened. Therefore, the motor can be reduced in size. Further, since the oil supply member is disposed in the vicinity of the winding and the stator, the winding and the stator can be reliably cooled.
In the case where the partition walls are provided as in the prior art, if the partition walls are made of metal, an eddy current may be generated. However, since the partition walls are not provided in the present invention, the generation of eddy currents can be prevented. Further, since no partition wall is provided, a strong sealing structure is not necessary.
Moreover, since a partition part is formed in a stator and oil can be directly injected with respect to the coil | winding arrange | positioned in a partition part, a coil | winding can be cooled reliably.

  According to the second aspect of the present invention, since the cooling oil can be uniformly supplied to the winding wound around the stator along the axial direction, the winding can be uniformly cooled. Can do.

  According to the third aspect of the present invention, since the housing and the stator can be brought into close contact with each other, the cooling efficiency of the winding and the stator can be improved.

  According to the invention described in claim 4, since the cooling oil can be supplied uniformly to the winding wound around the stator along the axial direction, the winding can be uniformly cooled. Can do.

  According to the invention described in claim 5, since the cooling oil is supplied into the space formed by the oil supply member and the stator, not only the windings but also the oil flows through the space. The stator can be cooled.

  According to the invention described in claim 6, since the oil supply member and the stator can be brought into close contact with each other, the cooling efficiency of the winding and the stator can be improved.

  According to the seventh aspect of the present invention, since the cooling oil can be supplied to the winding more reliably and evenly, the winding can be cooled more uniformly.

  According to the invention described in claim 8, when the oil supplied to the stator flows through the partitioned space and is discharged from the axial end surface of the stator into the housing chamber, the oil contacts the rotor. Can be prevented. Therefore, it is possible to prevent resistance due to oil coming into contact with the rotor, and to suppress a decrease in rotational performance of the rotor.

  According to the ninth aspect of the present invention, the oil receiving member can be easily and reliably held by sandwiching the oil receiving member between adjacent teeth of the stator.

(First embodiment)
Next, a first embodiment of the present invention will be described with reference to FIGS. In addition, the definition which shows the attachment direction and position of each apparatus in this embodiment shall define the left-right direction and an up-down direction toward a vehicle advancing direction by making a vehicle advancing direction ahead.
FIG. 1 is a schematic sectional view of a vehicle motor unit. As shown in FIG. 1, a vehicle motor unit (hereinafter referred to as a motor unit) 10 is fastened to a motor housing 11 that houses a motor 23 having a stator 21 and a rotor 22, and one side of the motor housing 11. A transmission housing 12 that houses a power transmission unit (not shown) that transmits power from the output shaft 24 of the motor 23, and a sensor housing 13 that is fastened to the other side of the motor housing 11 and houses the rotation sensor 25 of the motor 23. It is equipped with.

As shown in FIG. 2, a plurality of slots 28 are formed in the stator 21 at equal intervals along the circumferential direction, and a coil 17 is wound around the slots.
Specifically, the coil 17 extends from the inner slot 28 </ b> A of the stator 21 toward the radially outer side of the stator 21, and uses the outer slot 28 </ b> B surrounded by the partition portions 31 and 31 formed on the outer peripheral surface 21 b of the stator 21 as an output shaft. It extends across 24 axial directions. That is, a so-called toroidal winding motor in which a coil 17 formed in a ring shape is provided for each slot 28 is configured. The partition portion 31 is formed at a position extending in the radial direction of the teeth 32 of the stator 21.

  By winding the coil 17 in this manner, side protrusions 18 protruding from both axial end faces 21a of the stator 21 are formed, and a peripheral protrusion 19 protruding from the outer peripheral face 21b of the stator 21 is formed. Is done.

  Further, in the inner slot 28A, an oil receiving member 33 is provided on the further inner peripheral side where the coil 17 is disposed. The oil receiving member 33 is a plate-like member made of, for example, a resin or a nonmagnetic material, and is sandwiched between adjacent teeth 32 and 32. That is, a space surrounded by the adjacent teeth 32, 32, the oil receiving member 33, and the side surface 21c of the inner slot 28A is formed, and cooling oil can be circulated in the space. The oil is configured not to leak to the rotor 22 side. By comprising in this way, it can prevent that oil touches the rotating rotor 22 and is scattered. The oil receiving member 33 is formed longer in the axial direction than the side surface protruding portion 18 of the coil 17. The oil receiving member 33 is provided only in the slot 28 in which the coil 17 to which oil is supplied is disposed.

  Returning to FIG. 1, the mission housing 12 includes a common housing 12A fastened to the motor housing 11 and a gear housing 12B fastened to the common housing 12A. The motor housing 11 is configured as a motor chamber 36, the mission housing 12 is configured as a mission chamber 37, and the sensor housing 13 is configured as a sensor chamber 38.

  The motor housing 11 is formed in a substantially cylindrical shape so as to cover the entire motor 23. A bearing 26 that rotatably supports one end of the output shaft 24 of the motor 23 is provided on the mission housing 12 side of the boundary between the motor housing 11 and the mission housing 12, and the boundary between the motor housing 11 and the sensor housing 13. On the sensor housing 13 side, a bearing 27 that rotatably supports the other end of the output shaft 24 of the motor 23 is provided. A magnet 29 is attached to the outer peripheral surface of the rotor 22.

  Here, as shown in FIGS. 2 and 3, an oil supply member 40 capable of circulating the cooling oil is provided on the substantially upper half of the peripheral surface of the motor housing 11.

  The oil supply member 40 will be described in detail. The oil supply member 40 is provided along the outer peripheral surface of the motor housing 11 and at a position corresponding to the upper half of the motor housing 11. That is, the oil supply member 40 has a substantially C-shaped cross section. The oil supply member 40 is attached to the outer peripheral surface of the motor housing 11 using welding or screws. Further, the oil supply member 40 has shafts corresponding to the positions of the oil circulation portion 41 for the oil to circulate along the outer peripheral surface of the motor housing 11 along the circumferential direction and the coil 17 disposed in the motor housing 11. The oil storage part 42 formed along the direction, and the contact part 43 which closely_contact | adheres to the outer peripheral surface of the motor housing 11 are provided.

  As shown in FIG. 5, a plurality of oil ejection holes 44 are formed on the outer peripheral surface of the motor housing 11 corresponding to the oil storage portion 42 at substantially equal intervals along the axial direction (in this embodiment, three ). That is, the oil ejected from the oil ejection hole 44 is supplied to the peripheral surface protruding portion 19 of the coil 17. An oil supply pipe 45 is connected to the top of the oil supply member 40.

A method for manufacturing the motor 23 configured as described above will be described.
First, the stator 21 around which the coil 17 is wound is attached in the motor housing 11. At this time, the partition portion 31 of the stator 21 is press-fitted and fixed while contacting the inner peripheral surface of the motor housing 11. In addition, what is necessary is just to comprise so that the stator 21 and the motor housing 11 may be provided with a notch, or the stator 21 may be aligned using a knock pin or the like.
Next, the oil supply member 40 may be attached to the outer peripheral surface of the motor housing 11 and the oil supply pipe 45 may be connected to the oil supply member 40.

Next, a method for cooling the coil 17 (and the stator 21) of the motor unit 10 configured as described above will be described.
First, oil supplied from a cooling oil supply source (not shown) is supplied into the oil supply member 40 from an oil supply pipe 45 at the top of the motor housing 11. Then, this oil is supplied to the oil storage part 42 through the oil distribution part 41 of the oil supply member 40. The oil stored in the oil storage part 42 is sprayed from the oil ejection hole 44 to the peripheral protrusion 19 of the coil 17 in the motor housing 11. Then, the heat generated from the coil 17 is absorbed.

  The oil injected into the coil 17 flows while absorbing heat in the direction of the end surface 21a of the stator 21 (in the direction of the side protrusion 18 of the coil 17) while flowing through the space partitioned by the adjacent partition portions 31 and 31. . The oil that has flowed up to the side protrusion 18 is discharged into the motor chamber 36 as it is, or flows toward the coil 17 disposed in the inner slot 28 </ b> A of the stator 21. The oil that has absorbed the heat generated from the coil 17 is finally discharged into the motor chamber 36, but after the oil is discharged onto the oil receiving member 33, the motor chamber starts from the axial end of the oil receiving member 33. It is discharged into 36. The cooling oil discharged to the motor chamber 36 is stored in the lower portion of the motor chamber 36 and guided to a cooling oil supply unit (circulation pump) (not shown).

  In this way, since the cooling oil is directly injected into the coil 17, the heat generated from the coil 17 can be absorbed efficiently. The heat of the stator 21 can be absorbed simultaneously by the oil flowing through the slot 28.

According to this embodiment, in the motor 23 in which the coil 17 is wound in a toroidal shape, the partition portion 31 is formed on the outer peripheral side of the stator 21, and the plurality of slots 28 are formed by being partitioned by the partition portion 31 and the teeth 32. Since the oil supply member 40 in which the oil injection holes 44 capable of supplying oil are formed is provided in the (inner slot A and outer slot 28B), the rotor 22 and the stator 21 are used as in the conventional case where the housing is used as a refrigerant flow path. Since no partition wall is provided between the air gap and the air gap, the distance of the air gap can be shortened. Therefore, the motor 23 can be downsized. Further, since the oil supply member 40 is disposed in the vicinity of the coil 17 and the stator 21, the coil 17 and the stator 21 can be reliably cooled.
In the case where the partition walls are provided as in the prior art, if the partition walls are made of metal, there is a possibility that eddy currents may be generated. However, in this embodiment, since the partition walls are not provided, generation of eddy currents can be prevented. Further, since no partition wall is provided, a strong sealing structure is not necessary.
Moreover, since the partition part 31 is formed in the stator 21 and oil can be directly injected with respect to the coil 17 distribute | arranged to the space enclosed by the partition part 31, the coil 17 can be cooled reliably.

  Further, since the oil ejection holes 44 are formed corresponding to the positions where the coils 17 are arranged, and a plurality of the oil ejection holes 44 are formed along the axial direction, the stator 21 is wound around the coil 17 wound along the axial direction. Cooling oil can be supplied evenly, and the coil 17 can be uniformly cooled.

  Further, since the oil supply member 40 and the outer peripheral side of the partition portion 31 are in contact with each other, the cooling oil is supplied into the space formed by the partition portion 31 of the stator 21, and the oil flows through the space. By doing so, not only the coil 17 but also the stator 21 can be cooled.

  Further, since the oil supply member 40 is provided along the outer peripheral surface of the motor housing 11 and the stator 21 is configured to be press-fitted and fixed to the motor housing 11, the oil supply member 40 and the stator 21 can be brought into close contact with each other. The cooling efficiency of the coil 17 and the stator 21 can be improved.

  Further, since the oil receiving member 33 is provided in the inner slot 28A of the stator 21, the oil supplied to the stator 21 (coil 17) flows through the space defined by the partition portion 31, and the axial end surface 21a of the stator 21 is supplied. It is possible to prevent oil from coming into contact with the rotor 22 when being discharged into the motor chamber 36. Therefore, it is possible to prevent resistance due to oil coming into contact with the rotor 22, and to suppress a decrease in the rotational performance of the rotor 22.

  Since the oil receiving member 33 is sandwiched and held between the adjacent teeth 32, 32 of the stator 21, the oil receiving member 33 can be easily and reliably held.

  As shown in FIG. 6, as another aspect of the present embodiment, the side surface 21 d of the stator 21 on the side where the peripheral surface protruding portion 19 of the coil 17 is arranged has a substantially intermediate point in the axial direction as a convex vertex. The cross section in the axial direction may be formed in a mountain shape. If comprised in this way, the peripheral surface protrusion part 19 of the coil 17 wound by the stator 21 will also be distribute | arranged similarly, and it distribute | circulates the supplied cooling oil smoothly to the side protrusion part 18 side. The coil 17 can be cooled efficiently.

(Second embodiment)
Next, a second embodiment of the present invention will be described with reference to FIGS. The present embodiment is different from the first embodiment only in the configuration of the oil supply pipe, and the other configurations are substantially the same as those in the first embodiment. Description is omitted.

  As shown in FIGS. 7 and 8, an oil supply member 50 through which cooling oil can flow is provided between the stator 21 and the motor housing 11. In the present embodiment, the oil supply member 50 is disposed along the inner peripheral surface of the motor housing 11 and at a position corresponding to the upper half of the motor housing 11. That is, the oil supply member 50 has a substantially C-shaped cross section.

  Further, the oil supply member 50 has a heat absorption part 51 formed at a position corresponding to the space between the peripheral protrusions 19 and 19 of the adjacent coils 17. The heat absorbing portion 51 has substantially the same axial length as the stator 21, and the inner peripheral surface 51 a of the heat absorbing portion 51 is configured to contact the outer peripheral surface 21 b of the stator 21. That is, the heat absorption part 51 functions as the partition part 31 of the first embodiment, and is a space surrounded by the adjacent heat absorption parts 51, 51 and the outer peripheral surface 21b of the stator 21 (in the outer slot 28B of the first embodiment). Equivalent) is formed. Further, an oil ejection hole 53 that can inject cooling oil onto the peripheral protrusion 19 of the coil 17 is appropriately formed in the wall portion 52 of the heat absorbing portion 51. The cooling oil sprayed from the oil ejection hole 53 is sprayed to the side surface of the circumferential protrusion 19 of the coil 17. Further, the injection holes 53 are formed so as to correspond to both side surfaces of the circumferential protrusion 19 of the coil 17. The oil supply member 50 may be formed so as to have a substantially circular cross section (ring shape) so that oil does not circulate in a position corresponding to the heat absorption part 51 in the lower half.

  An oil receiving member 33 is provided on the inner diameter side of the coil 17 disposed in the inner slot 28 </ b> A of the stator 21. The oil receiving member 33 is formed to be slightly longer than the axial length of the stator 21.

  The oil supply member 50 may be formed integrally with the motor housing 11 or may be formed separately. The cooling oil is supplied from an oil supply pipe 45 connected to the upper portion of the motor housing 11, and a part of the cooling oil passes through the oil supply member 50 and is then formed in a discharge hole ( (Not shown) is discharged into the motor chamber 36. Further, another part of the cooling oil supplied to the oil supply member 50 is injected from the oil ejection hole 53 of the oil supply member 50 toward the coil 17 and passes through the slot 28 while directly cooling the coil 17. Then, it is discharged into the motor chamber 36. The cooling oil discharged to the motor chamber 36 is stored in the lower part of the motor chamber 36 and guided to a cooling oil supply unit (circulation pump) (not shown).

A method for manufacturing the motor 23 configured as described above will be described.
When the oil supply member 50 is formed integrally with the motor housing 11, the stator 21 around which the coil 17 is wound is attached in the motor housing 11. At this time, the inner peripheral surface 51a of the heat absorbing portion 51 of the oil supply member 50 and the outer peripheral surface 21b of the stator 21 may be press-fitted and fixed. The stator 21 may be resin-molded after being attached to the motor housing 11. In particular, after the stator 21 is attached, the motor housing 11 is resin-molded to eliminate a minute gap, and the coil 17 and the stator 21 can be cooled more efficiently. Further, the stator 21 can be more firmly fixed, and the highly reliable motor 23 can be manufactured. When resin molding is performed, care should be taken not to block the oil ejection holes 53.

  On the other hand, when the oil supply member 50 is separate from the motor housing 11, the oil supply member 50 is first attached to the motor housing 11. At this time, the inner peripheral surface of the motor housing 11 and the oil supply member 50 are press-fitted and fixed so as to contact each other. Next, the stator 21 around which the coil 17 is wound is attached to the motor housing 11. At this time, the stator 21 may be configured to be press-fitted and fixed to the oil supply member 50, or may be configured to be fixed by a resin mold after the stator 21 is disposed at a predetermined position.

Next, a method for cooling the coil 17 (and the stator 21) of the motor unit 10 configured as described above will be described.
First, oil supplied from a cooling oil supply source (not shown) is supplied into the oil supply member 50 from an oil supply pipe 45 at the top of the motor housing 11. The oil absorbs heat generated from the stator 21 mainly in the heat absorbing portion 51 while passing through the oil supply member 50. On the other hand, the cooling oil injected from the oil injection hole 53 of the oil supply member 50 is directly injected to the peripheral surface protrusion 19 of the coil 17 and absorbs heat mainly emitted from the coil 17.

  The oil injected into the coil 17 heats in the direction of the end surface 21a of the stator 21 (in the direction of the side protrusion 18 of the coil 17) while flowing through the space partitioned by the adjacent heat absorbing portions 51, 51 and the stator 21. Head while absorbing heat. The oil that has flowed up to the side protrusion 18 is discharged into the motor chamber 36 as it is, or flows toward the coil 17 disposed in the inner slot 28 </ b> A of the stator 21. The oil that has absorbed the heat generated from the coil 17 is finally discharged into the motor chamber 36, but after the oil is discharged onto the oil receiving member 33, the motor chamber starts from the axial end of the oil receiving member 33. It is discharged into 36. The cooling oil discharged to the motor chamber 36 is stored in the lower portion of the motor chamber 36 and guided to a cooling oil supply unit (circulation pump) (not shown).

  At this time, since the cooling oil is directly injected to the coil 17, the heat generated from the coil 17 can be absorbed efficiently. The heat of the stator 21 can also be absorbed by the heat absorbing portion 51 of the oil supply member 50, and the heat can be absorbed simultaneously by the oil flowing through the slot 28.

  According to the present embodiment, the oil supply hole 50 is formed in the wall portion 52 of the heat absorbing portion 51 in the oil supply member 50 so that the cooling oil can be directly injected into the coil 17. The coil 17 can be directly cooled by spraying the cooling oil directly onto the coil 17 while cooling.

  In addition, since the oil ejection holes 53 are formed on both wall portions 62 facing each other with the coil 17 interposed therebetween, the cooling oil can be sprayed more efficiently to the coil 17, so that the coil 17 is cooled more efficiently. be able to.

  Furthermore, since the heat absorption part 51 of the oil supply member 50 is disposed between the peripheral protrusions 19 and 19 of the adjacent coils 17, the space between the coils 17 can be used effectively, and the motor 23 can be downsized. it can.

The present invention is not limited to the above-described embodiment, and includes various modifications made to the above-described embodiment without departing from the spirit of the present invention. That is, the specific structure and shape described in the embodiment are merely examples, and can be changed as appropriate.
For example, in the present embodiment, the case of a permanent magnet brushless motor has been described. However, if the motor is a toroidal winding, the present invention may be applied to an induction motor, a reluctance motor, or the like.
Moreover, in this embodiment, although the structure which injects the oil for cooling only to the coil distribute | arranged to the upper half of the motor was employ | adopted, you may make it the structure which supplies oil to a perimeter substantially.
Furthermore, in the present embodiment, the case where the oil receiving member has a flat plate shape has been described. However, the oil receiving member is provided with an inclination such as a mountain-shaped cross section so that the oil dripped onto the oil receiving member smoothly reaches the end. It may be guided and discharged into the motor chamber.

It is a schematic longitudinal cross-sectional view of the vehicle motor unit in the embodiment of the present invention. It is sectional drawing which follows the AA line of FIG. It is a perspective view of the state where the oil supply member and the stator were attached to the motor housing in the first embodiment of the present invention. It is the B section enlarged view of FIG. It is explanatory drawing which shows the distribution direction of the oil in 1st embodiment of this invention. It is explanatory drawing which shows another aspect of the stator in 1st embodiment of this invention. It is sectional drawing (equivalent to FIG. 2) of the motor unit for vehicles in 2nd embodiment of this invention. It is the C section enlarged view of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Motor housing (housing) 17 ... Coil (winding) 21 ... Stator 22 ... Rotor 23 ... Motor (toroidal winding motor) 28 ... Slot 28A ... Inner slot 28B ... Outer slot 31 ... Partition 32 ... Teeth 33 ... Oil Receiving member 40 ... oil supply member 44 ... oil ejection hole 50 ... oil supply member 53 ... oil ejection hole

Claims (9)

A rotor,
A stator provided along the outer periphery of the rotor;
A winding wound on the stator in a toroidal shape,
In a toroidal winding motor that rotates the rotor by passing a current through the winding,
The stator has a partition for partitioning the windings,
An toroidal winding motor characterized in that an oil supply member capable of supplying oil is provided to a plurality of slots formed by being partitioned by the partition portion. The oil supply member is provided in a housing capable of accommodating the stator and the rotor, and an oil ejection hole is formed at a position in the housing where the oil supply member is provided.
The oil ejection holes are formed at positions corresponding to the respective windings, and a plurality of the oil ejection holes are formed along the axial direction so that oil is supplied to the windings. The toroidal winding motor according to claim 1.   The toroidal winding motor according to claim 2, wherein the oil supply member is provided in the housing, and the stator is press-fitted and fixed to the housing. The oil supply member is provided in a housing capable of accommodating the stator and the rotor, and an oil ejection hole is formed in the oil supply member.
The oil ejection holes are formed at positions corresponding to the respective windings, and a plurality of the oil ejection holes are formed along the axial direction so that oil is supplied to the windings. The toroidal winding motor according to claim 1.   The toroidal winding motor according to claim 4, wherein the oil supply member and the outer peripheral surface of the stator are in contact with each other.   The toroidal winding motor according to claim 4, wherein the oil supply member is provided in the housing, and the stator is press-fitted and fixed to the oil supply member.   The toroidal winding motor according to any one of claims 1 to 6, wherein a plurality of the oil ejection holes are formed so as to supply oil to both side surfaces of the winding.   The toroidal winding motor according to claim 1, wherein the stator includes an oil receiving member on an inner peripheral portion.   The toroidal winding motor according to claim 8, wherein the oil receiving member is sandwiched between teeth formed on an inner peripheral portion of the stator.

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