WO2017110527A1 - Logement pour moteur - Google Patents

Logement pour moteur Download PDF

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Publication number
WO2017110527A1
WO2017110527A1 PCT/JP2016/086743 JP2016086743W WO2017110527A1 WO 2017110527 A1 WO2017110527 A1 WO 2017110527A1 JP 2016086743 W JP2016086743 W JP 2016086743W WO 2017110527 A1 WO2017110527 A1 WO 2017110527A1
Authority
WO
WIPO (PCT)
Prior art keywords
lid member
motor housing
motor
annular cooling
flow path
Prior art date
Application number
PCT/JP2016/086743
Other languages
English (en)
Japanese (ja)
Inventor
勇介 澁谷
山本　哲也
Original Assignee
Ntn株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ntn株式会社 filed Critical Ntn株式会社
Publication of WO2017110527A1 publication Critical patent/WO2017110527A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/10—Cores; Manufacture or installation of cores
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/06—Cast metal casings

Definitions

  • the present invention relates to a motor housing having a coolant flow path on a side wall portion of the housing.
  • Some motors for automobiles which are vehicle drive devices, are provided with a flow path for circulating a coolant in the side wall of the housing on the outer periphery of a motor stator that generates a large amount of heat in order to suppress the temperature rise of the motor (patent) Reference 1).
  • the motor housing 100 of Patent Document 1 forms a single annular channel 102 in the side wall 101 through which a coolant flows, and this belt-shaped channel A water supply port 103 and a water discharge port 104 are provided at positions adjacent to 102.
  • a boundary wall 105 is provided between the water supply port 103 and the drainage port 104 so that the coolant that has entered the water supply port 103 does not flow out to the drainage port 104 through the shortest path as it is.
  • Japanese Patent Application Laid-Open No. H10-228707 discloses a cooling liquid that travels around the annular flow path 102.
  • the flow path 102 provided in the side wall 101 of the motor housing 100 is a collapsible shape having a shape shown in FIG. 17 or FIG. 18 that matches the flow path shape inside the mold when the motor housing 100 is cast-molded.
  • the cores 106a and 106b are arranged, and after casting, the cores 106a and 106b are collapsed and discharged.
  • an annular core 106a as shown in FIG. 17 is used. Since the core 106a having an annularly continuous shape shown in FIG. 17 has high strength, it is difficult to collapse in each process of manufacture, conveyance, and casting.
  • the core 106b used for forming 102 is provided with a divided portion 106c in the annular core 106b as shown in FIG. 18, and the boundary wall 105 is formed by the divided portion 106c.
  • the boundary wall 105 is formed by the divided portion 106c.
  • the present invention can use a highly continuous collapsible core having an annularly continuous shape when casting, and it is easy to discharge sand after casting, leaving sand in the flow path. It is difficult to provide a motor housing having a structure having a boundary wall between a water supply port and a water discharge port of an annular flow path.
  • a motor housing has an annular cooling passage inside a cylindrical motor housing body, and the motor housing body is provided in the annular cooling passage.
  • An opening that opens to the outer periphery is provided, a lid member that closes the opening is fixed to the motor housing body, and an inner boundary of the lid member is provided with a boundary that divides the annular cooling flow path.
  • a water supply port and a water discharge port for the coolant that communicate with the annular cooling channel are provided.
  • the water supply port and the water discharge port can be provided on the lid member.
  • an attachment surface of the lid member is formed in an opening that opens to the outer peripheral portion of the motor housing main body, and the lid member is bolted to the attachment surface, and a joint surface between the attachment surface of the lid member and the lid member is formed.
  • a gasket can be placed.
  • the boundary portion may be formed integrally with the lid member, or may be formed separately from the lid member.
  • the material of the boundary portion may be formed of an elastic material.
  • the motor housing according to the present invention has an annular cooling flow path inside a cylindrical motor housing main body, and an opening that opens to the outer periphery of the motor housing main body is provided in the annular cooling flow path. Because of this structure, cast molding can be performed using a high-strength core that is continuous in an annular shape in the mold.
  • the motor housing body has an opening at the outer periphery thereof, it is easy to discharge sand after casting from this opening, and it is difficult for sand to remain.
  • the opening that opens to the outer peripheral portion of the motor housing body is closed with a lid member, and a boundary portion that divides the annular cooling flow path is provided on the inner surface of the lid member, and the annular cooling flow path is sandwiched between the boundary portions.
  • a coolant supply port and a drain port are provided for communication. Therefore, the cooling water supplied from the supply port to the flow path is discharged from the discharge port after passing through the annular cooling flow channel, and is discharged from the discharge port as it is without going through the annular cooling flow channel. Therefore, the motor housing body of the motor housing can be effectively cooled by the cooling water.
  • FIG. 1 is a perspective view showing a first embodiment of a motor housing according to the present invention. It is a perspective view which shows the state which removed the cover member of 1st Embodiment. It is a front view of a 1st embodiment.
  • FIG. 5 is a cross-sectional view taken along line VV in FIG. 4. It is a perspective view of the core used when casting the housing for motors of 1st Embodiment. It is a perspective view of one embodiment of a lid member. It is a front view of one embodiment of a lid member. It is a side view of one Embodiment of a cover member.
  • FIG. 8A It is sectional drawing of the cc line of FIG. 8A. It is a front view of other embodiments of a lid member. It is a side view of other embodiment of a cover member. It is sectional drawing of the cc line of FIG. 9A. It is a front view of other embodiments of a lid member.
  • FIG. 10B is a sectional view taken along line bb in FIG. 10A. It is a front view of other embodiments of a lid member.
  • FIG. 11B is a sectional view taken along line bb in FIG. 11A.
  • FIG. 12B is a sectional view taken along line bb in FIG. 12A.
  • FIG. 12A It is a partial expanded sectional view of the housing for motors concerning this invention which uses the lid member of Drawing 12A and 12B. It is a perspective view which shows the conventional housing for motors. It is sectional drawing of the conventional motor housing. It is sectional drawing of the other conventional housing for motors. It is a perspective view of the core used when casting the conventional motor housing of FIG. It is a perspective view of the core used when casting the conventional motor housing of FIG.
  • the embodiment of the present invention will be described by taking a motor housing used in the two-motor vehicle drive device A as an example.
  • the two-motor vehicle drive device A has a reduction gear housing 20 that houses two reduction gears 2L and 2R in parallel on the left and right sides, and two electric motors on the left and right sides of the reduction gear housing 20.
  • 1L and 1R motor housings 3L and 3R are fixedly arranged.
  • cooling passages 4 for circulating the coolant are formed in the circumferential direction.
  • the cooling passages 4 of the motor housings 3L and 3R are provided with a supply port (not shown) for sucking cooling liquid supplied from a radiator (not shown) and a discharge port for discharging the cooling liquid that has passed through the cooling flow path 4.
  • An outlet (not shown) is provided.
  • the cooling liquid cooled by the radiator is supplied to the cooling flow path 4 through the supply inlet, passes through the cooling flow path 4 of the motor housings 3L and 3R, cools the motor housings 3L and 3R, and then is discharged from the discharge port. It is returned to the radiator and recycled.
  • the left and right electric motors 1L, 1R in the two-motor vehicle drive device A are housed in motor housings 3L, 3R as shown in FIG.
  • the motor housings 3L and 3R include cylindrical motor housing bodies 3aL and 3aR having outer surfaces having cooling channels 4 through which cooling liquid flows in the circumferential direction, and outer surfaces of the motor housing bodies 3aL and 3aR.
  • the outer walls 3bL and 3bR to be closed and inner walls 3cL and 3cR separated from the speed reducers 2L and 2R are formed inside the motor housing bodies 3aL and 3aR.
  • the inner walls 3cL and 3cR of the motor housing bodies 3aL and 3aR are provided with openings through which the motor shaft 12a is drawn.
  • the electric motors 1 ⁇ / b> L and 1 ⁇ / b> R have a radial gap type in which a stator 11 is provided on the inner peripheral surface of the motor housing body 3 aL and 3 aR, and a rotor 12 is provided on the inner periphery of the stator 11.
  • a stator 11 is provided on the inner peripheral surface of the motor housing body 3 aL and 3 aR
  • a rotor 12 is provided on the inner periphery of the stator 11.
  • an axial gap type electric motor may be used.
  • the rotor 12 has a motor shaft 12a in the center, and the motor shaft 12a is drawn out from the openings of the inner side walls 3cL and 3cR of the motor housing bodies 3aL and 3aR to the speed reducers 2L and 2R, respectively.
  • a seal member 13 is provided between the openings of the motor housing bodies 3aL and 3aR and the motor shaft 12a.
  • the motor shaft 12a is rotatably supported by the rolling bearings 14a and 14b on the inner side walls 3cL and 3cR and the outer side walls 3bL and 3bR of the motor housing main bodies 3aL and 3aR (FIG. 1).
  • the speed reducer housing 20 that accommodates two speed reducers 2L and 2R provided in parallel on the left and right has a three-piece structure of a central housing 20a and left and right side housings 20bL and 20bR fixed to both side surfaces of the central housing 20a. It has become.
  • the left and right side housings 20bL and 20bR are formed in a substantially symmetrical shape.
  • the side walls 20bL and 20bR of the speed reducer housing 20 are fixed to the side walls on the outboard side of the motor housing main bodies 3aL and 3aR of the electric motors 1L and 1R by a plurality of bolts 29, thereby reducing the speed.
  • Two electric motors 1L and 1R are fixedly arranged on the left and right of the machine housing 20.
  • the central housing 20a is provided with a partition wall 21 in the center.
  • the reduction gear housing 20 is divided into right and left parts by the partition wall 21, and left and right accommodation chambers 22L and 22R for accommodating the two reduction gears 2L and 2R are provided in parallel.
  • the speed reducers 2L and 2R are provided symmetrically, and have an input shaft 23 having an input gear 23a to which power is transmitted from the motor shaft 12a, and a large-diameter gear 24a meshing with the input gear 23a.
  • a parallel shaft gear reducer including an intermediate shaft 24 having a small diameter gear 24b meshing with the output gear 25a and an output shaft 25 having an output gear 25a.
  • Both ends of the input shaft 23 of the speed reducers 2L and 2R are connected to boss portions 27a formed on both left and right sides of the partition wall 21 of the central housing 20a and boss portions 27b formed on the side housings 20bL and 20bR via rolling bearings 28a and 28b. It is supported rotatably.
  • the end of the input shaft 23 on the outboard side is drawn out from the opening provided in the side housings 20bL and 20bR, and a seal member 31 is provided between the opening and the outer end of the input shaft 23. The leakage of the lubricating oil enclosed in the speed reducers 2L and 2R is prevented.
  • the input shaft 23 has a hollow structure, and the motor shaft 12a is inserted into the hollow input shaft 23.
  • the input shaft 23 and the motor shaft 12a are splined.
  • the intermediate shaft 24 is a stepped gear having a large diameter gear 24a meshing with the input gear 23a and a small diameter gear 24b meshing with the output gear 25a on the outer peripheral surface. Both ends of the intermediate shaft 24 are supported by rolling bosses 34a and 34b on bosses 32 formed on both surfaces of the partition wall 21 of the central housing 20a and bosses 33 formed on the side housings 20bL and 20bR.
  • the output shaft 25 has a large-diameter output gear 25a, and is supported by rolling bearings 37a and 37b on boss portions 35 formed on both surfaces of the partition wall 21 of the central housing 20a and boss portions 36 formed on the side housings 20bL and 20bR. Has been.
  • the end portion on the outboard side of the output shaft 25 is drawn to the outside of the reducer housing 20 from the opening formed in the side housings 20bL and 20bR, and is drawn on the outer peripheral surface of the end portion on the outboard side of the output shaft 25 that is pulled out.
  • the outer ring member 15a of the constant velocity joint is splined.
  • the constant velocity joint coupled to the output shaft 25 is connected to drive wheels (not shown) via a drive shaft (not shown).
  • a seal member 39 is provided between the end on the outboard side of the output shaft 25 and the openings formed in the side housings 20bL and 20bR to prevent leakage of the lubricating oil sealed in the speed reducers 2L and 2R. Yes.
  • FIG. 2 to 5 show a first embodiment of the motor housings 3L and 3R according to the present invention.
  • FIG. 6 shows an annular shape used when casting the motor housings 3L and 3R according to the first embodiment.
  • a collapsible core 52 is shown.
  • FIG. 7 is a perspective view of a lid member 57 that closes the opening 54 formed in the cylindrical motor housing bodies 3aL and 3aR of the motor housings 3L and 3R.
  • the core 52 includes a flow path forming portion 52a that forms an annular cooling flow path 4 in the cylindrical motor housing bodies 3aL and 3aR of the motor housings 3L and 3R,
  • An opening forming portion 52b is provided continuously to the annular flow path forming portion 52a and forms an opening 54 in the cylindrical motor housing main bodies 3aL and 3aR.
  • Sand discharge hole forming portions 52c for forming sand discharge holes are provided at two locations above and below the flow path forming portion 52a of the core 52.
  • the core 52 shown in FIG. 6 can be positioned with respect to the mold by the opening forming portion 52b, and sand can be discharged from the opening 54 (see FIG. 3). Therefore, the sand discharging hole forming portion 52c is not necessarily provided. There is no need.
  • the core 52 is formed in a rectangular cross section with a rounded corner portion.
  • corner portion of the core 52 is formed in a rounded rectangular cross section, it is easier to discharge the sand from the mold after molding, and it is difficult for the sand to be left behind, as compared to a rectangular cross section with a rounded corner portion.
  • the core 52 is, for example, a sand mold in which sand is hardened, and a material other than sand can be used such as salt and incinerator.
  • a flat lid mounting seat 56 is formed on the outer periphery of the cylindrical motor housing bodies 3aL and 3aR provided with the opening 54.
  • a lid member 57 that closes the opening 54 is fixed to the outer surface of the lid mounting seat 56 by a bolt 58.
  • a boundary portion 59 that divides the annular cooling flow path 4 is provided on the inner surface of the lid member 57.
  • a coolant supply port 60 and a drain port 61 are provided on the outer surface of the lid member 57 so as to communicate with the annular flow path with the boundary portion 59 interposed therebetween.
  • the cooling water supply port 60 and the drainage port 61 are provided across the boundary 59, the cooling water supplied from the water supply port 60 to the cooling flow path 4 travels around the annular cooling flow path 4. Thus, it is possible to prevent the cooling water from being discharged from the drain port 61 without being rotated around the annular cooling channel 4. Therefore, the motor housing bodies 3aL and 3aR of the motor housings 3L and 3R are effectively cooled by the cooling water.
  • the joint surface between the lid mounting seat 56 and the lid member 57 is applied with a general liquid sealing method such as application of a gasket such as an O-ring, a rubber sheet, or a liquid gasket in order to prevent leakage of the coolant. ing.
  • a gasket such as an O-ring, a rubber sheet, or a liquid gasket
  • the lid member 57 includes a plate-like portion 57a fixed to the lid mounting seat 56 provided on the motor housing main bodies 3aL and 3aR by bolts 58, and a boundary portion 59 provided on the inner surface of the plate-like portion 57a. .
  • the lid member 57 of the embodiment shown in FIGS. 2 to 7 has a plate-like portion 57a and a boundary portion 59 made of aluminum and integrally formed. Further, the plate-like portion 57a and the boundary portion 59 can be formed integrally with not only aluminum but also iron or resin.
  • the lid member 57 shown in FIGS. 8A to 8C is fixed by inserting the pipes forming the water supply port 60 and the drain port 61 through the insertion holes formed in the plate-like portion 57a.
  • the pipes forming the water supply port 60 and the drain port 61 can be press-fitted into the insertion hole of the plate-like portion 57a and can be fixed. When fixing by press-fitting, the plate-like portion is used to prevent water leakage. It is necessary to precisely control the tolerance between the insertion hole 57a and the pipe diameter.
  • the plate is prevented from coming out at a high temperature due to the difference in linear expansion coefficient with the plate-like portion 57a made of aluminum. Tolerance management between the insertion hole of the shaped portion 57a and the pipe diameter needs to be stricter.
  • the cover member 57 of the embodiment shown in FIGS. 9A to 9C is formed by increasing the thickness of the portion of the insertion hole provided in the plate-like portion 57a, the pipe forming the water supply port 60 and the drain port 61, the plate-like portion 57a, This is an example of improving the fixing strength.
  • the lid member 57 of the embodiment shown in FIGS. 10A and 10B has a boundary portion 59 provided on the inner surface of the plate-like portion 57a as a separate body from the plate-like portion 57a, and the boundary portion 59 is welded and fixed to the inner surface of the plate-like portion 57a. This is an example.
  • the lid member 57 of the embodiment shown in FIGS. 11A and 11B is the same as the embodiment shown in FIGS. 10A and 10B in that the boundary portion 59 provided on the inner surface of the plate-like portion 57a is separated from the plate-like portion 57a.
  • a convex portion 57b is provided on the inner surface of the plate-like portion 57a, and the concave portion 59a into which the convex portion 57b is fitted is provided as the boundary portion 59. It is provided on the end face.
  • the lid member 57 of the embodiment shown in FIGS. 12A, 12B, and 13 is different from the plate-like portion 57a in that the boundary portion 59 provided on the inner surface of the plate-like portion 57a is as shown in FIGS. 10A, 10B, and 11A. It is the same as that of embodiment shown to 11B.
  • the lid member 57 of the embodiment shown in FIGS. 12A, 12B, and 13 is provided with concave portions 57c and 59b in which both ends of the boundary portion 59 are fitted in the inner surface of the lid member 57 and the cooling flow path 4, thereby forming the lid member 57.
  • the holding strength of the boundary portion 59 with respect to the flow path 55 is increased.
  • the boundary portion 59 is formed of an elastic material. By pressing against the cooling channel 4, the shielding effect of the cooling channel 4 can be enhanced.
  • the motor housings 3L and 3R of the present invention have a high cooling effect when used in a vehicle drive motor for automobiles that generate large amounts of heat.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Motor Or Generator Frames (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

Le problème décrit par la présente invention est de fournir des logements 3L, 3R pour un moteur, lesdits logements 3L, 3R ayant une structure comprenant une paroi de délimitation 59 entre une entrée 60 d'eau et une sortie 61 d'eau d'un passage de refroidissement annulaire 4. La structure permet, lors du coulage en barbotine, d'utiliser un noyau éclipsable 52 très résistant présentant une configuration annulaire continue. Le sable est facilement évacué après coulage, et le sable n'a pas tendance à rester dans le passage. Dans les logements 3L, 3R pour un moteur, le passage de refroidissement annulaire 4 est ménagé à l'intérieur des corps cylindriques 3aL, 3aR des logements pour un moteur. Une ouverture 54 qui s'ouvre sur la périphérie externe des corps 3aL, 3aR des logements pour un moteur est ménagée sur le passage de refroidissement annulaire 4. Un élément couvercle 57 qui obture la partie d'ouverture 54 est fixé aux corps 3aL, 3aR des logements pour un moteur. La surface interne de cet élément couvercle 57 est pourvue d'une partie de délimitation 59 qui divise le passage de refroidissement annulaire 4, et de l'entrée 60 d'eau et de la sortie 61 d'eau pour liquide de refroidissement, qui communiquent avec le passage de refroidissement annulaire 4 et qui sont ménagées sur les deux côtés de la partie de délimitation 59.
PCT/JP2016/086743 2015-12-24 2016-12-09 Logement pour moteur WO2017110527A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015-250854 2015-12-24
JP2015250854A JP2017118668A (ja) 2015-12-24 2015-12-24 モータ用ハウジング

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WO2017110527A1 true WO2017110527A1 (fr) 2017-06-29

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019171535A1 (fr) * 2018-03-08 2019-09-12 日産自動車株式会社 Machine dynamo-électrique et procédé de fabrication d'une machine dynamo-électrique
WO2021079858A1 (fr) * 2019-10-25 2021-04-29 日立Astemo株式会社 Machine électrique tournante et son procédé de fabrication

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6950499B2 (ja) * 2017-12-01 2021-10-13 日産自動車株式会社 回転電機、及び回転電機における蓋部材の取り付け方法
DE102023100955A1 (de) 2023-01-17 2024-07-18 Schaeffler Technologies AG & Co. KG Elektrische Maschine mit elastisch angefedertem Trennelement für einen Kühlkanal

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002186215A (ja) * 2000-10-06 2002-06-28 Hitachi Ltd 車両用交流発電機
JP2004364429A (ja) * 2003-06-05 2004-12-24 Hitachi Ltd 液冷式回転電機

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002186215A (ja) * 2000-10-06 2002-06-28 Hitachi Ltd 車両用交流発電機
JP2004364429A (ja) * 2003-06-05 2004-12-24 Hitachi Ltd 液冷式回転電機

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019171535A1 (fr) * 2018-03-08 2019-09-12 日産自動車株式会社 Machine dynamo-électrique et procédé de fabrication d'une machine dynamo-électrique
JPWO2019171535A1 (ja) * 2018-03-08 2021-02-12 日産自動車株式会社 回転電機及び回転電機の製造方法
WO2021079858A1 (fr) * 2019-10-25 2021-04-29 日立Astemo株式会社 Machine électrique tournante et son procédé de fabrication
JPWO2021079858A1 (fr) * 2019-10-25 2021-04-29
CN114586264A (zh) * 2019-10-25 2022-06-03 日立安斯泰莫株式会社 旋转电机以及旋转电机的制造方法
JP7238153B2 (ja) 2019-10-25 2023-03-13 日立Astemo株式会社 回転電機及び回転電機の製造方法

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