WO2017098865A1

WO2017098865A1 - Motor housing

Info

Publication number: WO2017098865A1
Application number: PCT/JP2016/083808
Authority: WO
Inventors: 勇介澁谷; 山本　哲也
Original assignee: Ntn株式会社
Priority date: 2015-12-11
Filing date: 2016-11-15
Publication date: 2017-06-15
Also published as: JP2017108579A

Abstract

The present invention addresses the problem of providing motor housings 3L, 3R having a high cooling effect, wherein multiple flow paths circulating a coolant are arranged in parallel, without using a core 52 having a complex shape. Multiple separate C-shaped flow paths are provided in parallel in the interior of cylindrical motor housing main bodies 3aL, 3aR, openings 54a-54d which open on the outer periphery of the motor housing main bodies 3aL, 3aR are provided at the ends of the separate C-shaped flow paths, a lid member 56 covering these openings 54a-54d is affixed to the motor housing main bodies 3aL, 3aR, and a linking flow path 60 connecting the opening 54b of one flow path and the opening 54c of one adjacent flow path is provided in the inner surface of the lid member 56. Thus, it is possible to mold the motor housings 3L, 3R by using the C-shaped core 52.

Description

Motor housing

This invention relates to a motor housing having a coolant flow path therein.

2. Description of the Related Art Some motors for automobiles, which are vehicle drive devices, are provided with a flow path through which a coolant flows in an outer peripheral housing of a motor stator that generates a large amount of heat in order to suppress an increase in the temperature of the motor (Patent Document). 1).

As shown in FIG. 18, the motor housing 100 of Patent Document 1 has a flow path 102 through which a coolant flows in a spiral shape in the side wall portion 101 to enhance the cooling effect.

FIG. 19 shows a collapsible core 103 that is disposed inside a mold when the motor housing 100 is formed by casting. The core 103 is spirally formed to form a spiral flow path 102. It is formed into a shape.

JP 2012-65394 A

However, since the spiral core 103 has a complicated shape, the structure of a mold for manufacturing the core 103 is also complicated.

Also, it is difficult to hold a complex spiral core in the mold during casting.

Further, when the core 103 is collapsed after casting and extracted from the casting, the sand forming the core 103 is likely to remain inside the spiral channel, and if the channel is spiral, the sand remaining inside It is difficult to confirm.

Therefore, an object of the present invention is to provide a motor housing having a high cooling effect in which a plurality of flow paths for circulating a coolant are arranged in parallel without using a complicated core.

In order to solve the above-described problems, a motor housing according to the present invention is provided with a plurality of independent C-type cooling flow paths in parallel inside a cylindrical motor housing body, and the independent C-type cooling is provided. The connecting flow path connecting the flow paths is provided on the outer peripheral portion of the motor housing main body.

An opening that opens to the outer periphery of the motor housing body is provided at the end of the independent C-shaped cooling flow path, and a lid member that closes the opening is fixed to the motor housing body, and the inner surface of the lid member In addition, a communication flow path that connects one opening of the cooling flow path and one opening of the adjacent flow path is provided.

In addition, an opening that opens to the outer periphery of the motor housing main body is provided at the end of the independent C-shaped cooling flow path, and a lid member that closes the opening is fixed to the motor housing main body. It is also possible to provide a communication channel connecting the one opening of the motor and one opening of the adjacent cooling channel on the outer peripheral portion of the motor housing body.

One of the openings of the cooling channel positioned at one end of the plurality of independent C-shaped cooling channels is used as a coolant inlet, and one of the openings of the cooling channel positioned at the other end is used as the cooling liquid. It can be used as a discharge port.

In the motor housing according to the present invention, a plurality of independent C-shaped cooling flow paths are provided in parallel inside a cylindrical motor housing main body, and the communication flow path connecting the independent cooling flow paths is a cylindrical motor. Since the structure is provided on the outer peripheral portion of the housing main body, C-shaped cores having the same shape can be easily arranged in parallel in the mold.

In addition, since the core is C-shaped, it is not a complicated spiral shape as in the prior art, so the core mold can be made a simple structure, and the sand can be easily discharged after casting. The sand residue can also be easily confirmed for each independent C-shaped cooling channel.

It is a cross-sectional top view which shows embodiment with which two cooling flow paths are provided in parallel with the 2 motor vehicle drive device using the housing for motors concerning this invention. It is a cross-sectional top view which shows embodiment with which three cooling flow paths are provided in parallel by the 2 motor vehicle drive device using the housing for motors concerning this invention. 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 perspective view showing the state where two C type cores used when casting the motor housing of the first embodiment are juxtaposed. It is a perspective view which shows 2nd Embodiment of the housing for motors concerning this invention. It is a perspective view which shows the state which removed the cover member of 2nd Embodiment. It is a perspective view which shows the state which put in parallel 3 C type cores used when casting the motor housing of 2nd Embodiment. It is a perspective view which shows 3rd Embodiment of the housing for motors concerning this invention. It is a perspective view which shows the state which removed the cover member of 3rd Embodiment. It is a perspective view which shows 4th Embodiment of the housing for motors concerning this invention. It is a perspective view which shows the state which removed the cover member of 4th Embodiment. It is a side view of the state where the lid member of a 4th embodiment was removed. It is a perspective view which shows the state which connected the two C type cores used when casting the motor housing of 4th Embodiment by the flow-path formation part. It is a side view of the state where the lid member of a 5th embodiment was removed. It is a side view of the state where the lid member of a 6th embodiment was removed. It is a side view of the state where the lid member of a 7th embodiment was removed. It is a perspective view which shows the conventional housing for motors. 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.

As shown in FIG. 1 or 2, the two-motor vehicle drive device A has a reduction gear housing 20 that houses two reduction gears 2 L and 2 R in parallel on the left and right sides, and two reduction gear housings 20 on the left and right sides of the reduction gear housing 20. The

motor housings

3L and 3R of the

electric motors

1L and 1R are fixedly arranged.

As shown in FIG. 1 or FIG. 2, cooling passages 4 for circulating the coolant are formed in the circumferential direction in the

motor housings

3L and 3R of the two left and right

electric motors

1L and 1R.
FIG. 1 shows two cooling channels 4 as in the first embodiment shown in FIGS. 3 to 5, the fourth embodiment shown in FIGS. 11 to 14, and the fifth embodiment shown in FIG. The example provided in parallel is shown.
2 shows the second embodiment shown in FIGS. 6 to 8, the third embodiment shown in FIGS. 9 to 10, the sixth embodiment shown in FIG. 16, and the seventh embodiment shown in FIG. The example which provided the three cooling flow paths 4 in parallel like the form is shown.

At the end of the cooling flow path 4 of the

motor housings

3L, 3R on the outboard side (outside of the vehicle), a supply port 5 for sucking a coolant supplied from a radiator (not shown) is provided. 5 and the radiator are connected by a supply pipe 7.

A discharge port 6 for discharging the coolant that has passed through the cooling flow path 4 is provided at the end of the cooling flow path 4 of the

motor housings

3L and 3R on the inboard side (vehicle center side). 6 and the radiator are connected by a discharge pipe 8.

It is convenient to use a one-touch type pipe joint that can be connected with one touch for connection between the inlet 5 and the inlet pipe 7 or between the outlet 6 and the outlet pipe 8.

The cooling liquid cooled by the radiator is supplied to the cooling flow path 4 through the supply pipe 7 and the supply inlet 5, and passes through the cooling flow path 4 of the

motor housings

3L and 3R to pass through the

motor housings

3L and 3R. After cooling, the gas is discharged from the discharge port 6 and returned to the radiator through the discharge pipe 8 for circulation.

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.

As shown in FIG. 1 or 2, the electric motors 1 L and 1 R are provided with a stator 11 on the inner peripheral surface of the motor housing main bodies 3 a L and 3 a R, and a rotor 12 is provided at an interval on the inner periphery of the stator 11. A radial gap type is used. Although not shown, 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 or FIG. 2).

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.

As shown in FIG. 1 or FIG. 2, 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 meshing with the input gear 23a. This is a parallel shaft gear reducer including an intermediate shaft 24 having a small diameter gear 24b meshing with the diameter gear 24a and 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.

3 and 4 show a first embodiment of the

motor housings

3L and 3R according to the present invention, and FIG. 5 shows a C-type used when casting the

motor housings

3L and 3R according to the first embodiment. A collapsible core 52 having a shape is shown.

The core 52 includes a flow path forming portion 52a that forms an independent C-shaped cooling flow path 4 inside the cylindrical motor housing bodies 3aL and 3aR of the

motor housings

3L and 3R, and the C-shaped flow path. Opening forming portions 52b are provided at both ends of the forming portion 52a. The opening forming portions 52b form openings 54a to 54d in cylindrical motor housing bodies 3aL and 3aR.

The core 52 is formed in a rectangular section with a rounded corner. When the 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.

When casting the

motor housings

3L and 3R shown in FIGS. 3 and 4, two cores 52 are arranged in parallel in the mold, the molten metal is poured into the mold, and the core 52 is collapsed after the molten metal is cooled. When the core 52 is extracted, two independent cooling channels 4 are formed in parallel inside the cylindrical motor housing bodies 3aL and 3aR by the C-shaped channel forming portion 52a of the core 52, Four

openings

54 a, 54 b, 54 c, 54 d are formed on the outer periphery of the cylindrical motor housing bodies 3 aL, 3 a R by the opening forming parts 52 b provided at the ends of the two cores 52.

A flat lid mounting seat 55 is formed on the outer periphery of the cylindrical motor housing bodies 3aL and 3aR in which the four

openings

54a, 54b, 54c and 54d are provided.

A lid member 56 that closes the

openings

54 a, 54 b, 54 c, 54 d is fixed to the outer surface of the lid mounting seat 55 by bolts 57.

The lid member 56 is formed with a coolant inlet 5, a coolant outlet 6, and a communication channel 60 that connects adjacent C-shaped channels.

In the embodiment of FIGS. 3 and 4, when the lid member 56 is fixed to the outer surface of the lid mounting seat 55 with a bolt 57, the inlet 5 is opened to the opening 54a, the outlet 6 is opened to the opening 54d, and the opening 54b is opened. The part 54 c communicates with the communication channel 60. The coolant supplied from the supply port 5 is introduced into the C-shaped cooling channel 4 on the left (outboard) side of FIG. 4 from the opening 54 a, drawn out from the opening 54 b, and connected to the communication channel 60. 4 enters the right (inboard) side C-shaped cooling flow path 4 from the right (inboard) side C-shaped cooling flow path 4 in FIG. It is discharged from the portion 54d to the discharge port 6 of the lid member 56.

The joint surface between the lid mounting seat 55 and the lid member 56 is sealed with a sealing member such as an O-ring or a liquid gasket in order to prevent leakage of the coolant.

The

motor housings

3L and 3R of the second embodiment shown in FIGS. 6 and 7 are formed by arranging three C-shaped cores 52 in parallel in a mold as shown in FIG.

The

motor housings

3L and 3R according to the second embodiment are arranged inside the cylindrical motor housing bodies 3aL and 3aR by the flow path forming portions 52a of the three cores 52 arranged in parallel in the mold. As shown in FIG. 7, the outer periphery of the cylindrical motor housing main bodies 3aL and 3aR is formed by the opening forming portions 52b formed in parallel in the two cooling channels 4 and provided at the ends of the three cores 52. Six

openings

54a, 54b, 54c, 54d, 54e, and 54f are formed in the portion.

On the outer periphery of the cylindrical motor housing bodies 3aL and 3aR provided with the six

openings

54a, 54b, 54c, 54d, 54e, and 54f, a flat lid mounting seat 55 is provided as in the first embodiment. Is formed.

As shown in FIG. 6, a lid member 56 that closes the

openings

54 a, 54 b, 54 c, 54 d, 54 e, 54 f is fixed to the outer surface of the lid mounting seat 55 with bolts 57.

The lid member 56 is formed with a coolant inlet 5, a coolant outlet 6, and two communication channels 60 that connect adjacent C-shaped cooling channels 4.

In the second embodiment, when the lid member 56 is fixed to the outer surface of the lid mounting seat 55 with a bolt 57, the supply port 5 is positioned in the first cooling channel 4 on the leftmost (outboard) side in FIG. The outlet 54a communicates with the opening 54f located in the third cooling channel 4 located on the rightmost (inboard) side. Then, the opening 54b of the first channel and the opening 54c of the second cooling channel 4 in the middle are communicated by the communication channel 60, and the opening 54d of the second cooling channel 4 and the third channel 54c are connected. The opening 54 e of the cooling channel 4 is communicated with the second communication channel 60.

The coolant supplied from the supply port 5 is introduced into the first cooling channel 4 on the left (outboard) side of FIG. 7 from the opening 54a, drawn out from the opening 54b, and connected to the left communication channel 60. Enters the second cooling channel 4 from the opening 54c through the left communication channel 60, and is drawn out from the opening 54d of the second cooling channel 4 to the second right (inboard). Enters the communication channel 60 on the side, passes through the communication channel 60 on the right side, enters the third cooling channel 4 from the opening 54e, passes through the third cooling channel 4, and passes through the third cooling channel 4 to cover the lid member 56. Is discharged to the discharge port 6.

The

motor housings

3L and 3R of the third embodiment shown in FIGS. 9 and 10 are formed by arranging three cores 52 in parallel in a mold, as in the second embodiment. The arrangement of the two communication channels 60 provided in the lid member 56 is different from the second embodiment.

As in the second embodiment, the

motor housings

3L and 3R of the third embodiment are provided for the cylindrical motor by the flow path forming portions 52a of the three cores 52 arranged in parallel in the mold. Three cooling flow paths 4 are formed in parallel inside the housing main bodies 3aL and 3aR, and cylindrical motor housing main bodies 3aL and 3aR are formed by opening forming portions 52b provided at the ends of the three cores 52. As shown in FIG. 10, six

openings

54a, 54b, 54c, 54d, 54e, and 54f are formed in the outer peripheral portion of the.

As in the second embodiment, a flat lid mounting seat 55 is provided on the outer periphery of the cylindrical motor housing bodies 3aL and 3aR provided with the six

openings

54a, 54b, 54c, 54d, 54e, and 54f. Is formed.

A lid member 56 that closes the

openings

The lid member 56 is formed with a coolant inlet 5, a coolant outlet 6, and two communication channels 60 that connect adjacent C-shaped cooling channels 4. In the second embodiment, the two communication channels 60 are provided obliquely. In the third embodiment, the two communication channels 60 are provided in parallel in the vertical direction, and the lid member. 56 is fixed to the outer surface of the lid mounting seat 55 with bolts 57, the supply port 5 is at the opening 54a located in the first cooling channel 4 on the leftmost (outboard) side in FIG. It communicates with the opening 54f located in the third cooling channel 4 located on the right (inboard) side. The opening 54b of the first cooling channel 4 and the opening 54c of the second cooling channel 4 in the middle communicate with each other by the upper communication channel 60, and the openings 54d and 3 of the second cooling channel 4 are connected. The opening 54e of the first cooling flow path 4 is communicated with the second communication flow path 60 on the lower side.

The coolant supplied from the supply port 5 is introduced into the first cooling channel 4 on the left (outboard) side of FIG. 10 from the opening 54a, drawn out from the opening 54b, and connected to the upper communication channel 60. Enters the second cooling channel 4 from the opening 54c located in the second cooling channel 4 and is drawn out from the opening 54d of the second cooling channel 4 through the communication channel 60. Enter the second communication channel 60, pass through the communication channel 60, enter the third cooling channel 4 from the opening 54 e of the third cooling channel 4, pass through the third cooling channel 4, The liquid is discharged from the opening 54f to the discharge port 6 of the lid member 56.

Next, the

motor housings

3L and 3R of the fourth embodiment shown in FIGS. 11 to 13 are formed with flow paths for two cores 52 arranged in parallel in the mold, as in the first embodiment. Two cooling flow paths 4 are formed in parallel inside cylindrical motor housing bodies 3aL and 3aR by the portion 52a, and a cylinder is formed by the opening forming portion 52b provided at the ends of the two cores 52. As shown in FIGS. 12 and 13, four

openings

54 a, 54 b, 54 c, and 54 d are formed on the outer peripheral portions of the motor housing bodies 3 aL and 3 aR.

In the fourth embodiment, as shown in FIG. 14, adjacent opening forming portions 52b of two C-shaped cores 52 are connected by a communication flow path forming portion 52c, and by this communication flow path forming portion 52c. The cylindrical motor housing main bodies 3aL and 3aR are provided with recesses 61 for connecting flow paths connecting the adjacent flow paths on the lid mounting seat 55.

In the fourth embodiment, the lid member 56 is provided with a recess 61 for connecting flow paths connecting adjacent flow paths to the lid mounting seat 55 of the cylindrical motor housing bodies 3aL, 3aR. Only the inlet 5 and the outlet 6 are provided.

The coolant supplied from the supply port 5 is introduced into the C-shaped cooling flow path 4 on the left (outboard) side of FIGS. 12 and 13 from the opening 54a, drawn out from the opening 54b, and attached to the lid. It passes through the communication channel recess 61 provided in the seat 55, enters the second cooling channel 4 from the opening 54c of the second cooling channel 4, passes through the second cooling channel 4, and opens 54d. To the discharge port 6 of the lid member 56.

In addition, although the recessed part 61 for communication flow paths which connect the adjacent flow paths shown by 4th Embodiment is formed by casting by the communication flow path formation part 52c of the core 52, the communication flow path formation part 52c is formed. It is also possible to use the core 52 having no gap and cut the lid mounting seat 55 after casting to form the recess 61 for the communication flow path.

Next, the

motor housings

3L and 3R of the fifth embodiment shown in FIG. 15 are different from the fourth embodiment in the arrangement of the communication channel recesses 61 that connect the adjacent cooling channels 4.

In the fifth embodiment, the communication channel recess 61 that connects the adjacent cooling channels 4 is provided between the opening 54 b of the first channel and the opening 54 c of the second cooling channel 4. Provided.

The

motor housings

3L and 3R of the sixth and seventh embodiments shown in FIGS. 16 and 17 are recessed portions for communication channels that connect adjacent cooling channels 4 as in the fourth and fifth embodiments. 61 is common to the lid mounting seat 55 of the cylindrical motor housing main bodies 3aL and 3aR. However, in the sixth and seventh embodiments, the C-type provided to the cylindrical motor housing main bodies 3aL and 3aR is used. Three cooling channels 4 are provided in parallel, and six

openings

54a, 54b, 54c, 54d, 54e, 54f are provided in the lid mounting seat 55.

In the sixth embodiment shown in FIG. 16, the lid mounting seat 55 is provided with an opening 54 b of the first cooling channel 4, an opening 54 c of the second cooling channel 4, and an opening of the second cooling channel 4. The portion 54d and the opening 54e of the third cooling flow path 4 are connected by the recess 61 for the communication flow path.

In the seventh embodiment shown in FIG. 17, the lid mounting seat 55 is provided with an opening 54b of the first cooling channel 4, an opening 54c of the second cooling channel 4, and an opening of the second cooling channel 4. The portion 54d and the opening 54e of the third cooling flow path 4 are connected by the recess 61 for the communication flow path.

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.

1L, 1R:

Electric motor

2L, 2R:

Reducer

3L, 3R: Motor housing 3aL, 3aR: Motor housing body 3bL, 3bR: Outer wall 3cL, 3cR: Inner side wall 4: Cooling flow path 5: Supply inlet 6: Discharge port 7: Feeding pipe 8: Discharge pipe 11: Stator 12: Rotor 12a: Motor shaft 13:

Seal member

14a, 14b: Rolling bearing 15a: Outer ring member 20: Reduction gear housing 20a: Central housing 20bL, 20bR: Side housing 21:

partition walls

22L, 22R: storage chamber 23: input shaft 23a: input gear 24: intermediate shaft 24a: large diameter gear 24b: small diameter gear 25: output shaft 25a:

output gears

27a, 27b:

boss portions

28a, 28b : Rolling bearing 29: Bolt 31: Seal member 32, 33:

Boss portions

34a, 34b: Rolling bearings 35, 36:

Boss portions

37a, 37b: Rolling bearings 39: Seal member 52: Core 52a: Flow path forming portion 52b: Opening forming portion 52c: Communication flow

path forming portion

54a, 54b, 54c, 54d, 54e, 54f: Opening 55: Lid mounting seat 56: Lid member 57: Bolt 60: Connection channel 61: Recess A: 2-motor vehicle drive device

Claims

A plurality of independent C-shaped flow paths are provided in parallel inside a cylindrical motor housing body, and a communication flow path connecting the independent flow paths is provided on the outer periphery of the motor housing body. Motor housing.
An opening that opens to the outer periphery of the motor housing main body is provided at the end of the independent C-shaped flow path, and a lid member that closes the opening is fixed to the motor housing main body. The motor housing according to claim 1, further comprising a communication channel connecting one opening of the channel and one opening of the adjacent channel.
An opening that opens to the outer periphery of the motor housing main body is provided at the end of the independent C-shaped flow path, and a lid member that closes the opening is fixed to the motor housing main body. The motor housing according to claim 1, wherein a connecting flow path that connects the first section and one opening of the adjacent flow path is provided on an outer peripheral portion of the motor housing body.
One of the openings of the C-type channel located at one end of the plurality of independent C-type channels is used as a coolant inlet, and one of the openings of the C-type channel located at the other end The motor housing according to any one of claims 1 to 3, wherein is a cooling liquid discharge port.
3. The motor housing according to claim 2, wherein the supply port and the discharge port are provided in a lid member.