WO2023228335A1

WO2023228335A1 - Drive device

Info

Publication number: WO2023228335A1
Application number: PCT/JP2022/021453
Authority: WO
Inventors: 大樹平山; 日出樹下澤; 敦士鈴木; 尚輝工藤
Original assignee: 日産自動車株式会社
Priority date: 2022-05-25
Filing date: 2022-05-25
Publication date: 2023-11-30

Abstract

In this drive device, a rotating electric machine-side flow path and an inverter-side flow path are connected via a contact surface where a rotating electric machine housing and an inverter housing are in contact with each other. The inverter-side flow path comprises: a first flow path that is linearly provided in an extended manner in a direction separated from a portion connected to the rotating electric machine-side flow path; and a second flow path that branches from the first flow path and circulates within the inverter housing. An end portion of the first flow path is formed as a penetration opening portion on the upper surface of the inverter housing, and an attachable closing member for closing the opening portion is provided at the end portion.

Description

drive device

The present invention relates to a drive device.

A refrigerant flow path through which a refrigerant for cooling flows is provided in a casing of a drive device that includes a rotating electrical machine and an inverter device that supplies power to the rotating electrical machine. JP6589095B discloses an on-off valve that is configured to communicate with a first refrigerant flow path provided in a box-shaped housing and a second refrigerant flow path provided in a rotating electric machine, and that opens and closes the first refrigerant flow path. A configuration comprising the following is disclosed.

The technology described in JP6589095B prevents the refrigerant from flowing out of the inverter device by closing the middle of the first refrigerant flow path with an on-off valve when the inverter device housed in a box-shaped housing is removed from the rotating electric machine. It is configured to do this. In such a configuration, there is a possibility that the refrigerant remaining in the first refrigerant flow path below the opening/closing valve drips. Therefore, since it is not possible to reliably prevent the refrigerant from flowing out from the drive device, when the inverter device is removed from the rotating electrical machine, there is a possibility that problems with insulation may occur due to the refrigerant flowing out.

The present invention has been made in view of such problems, and an object of the present invention is to provide a drive device that can suppress deterioration of insulation properties when removing an inverter device.

One embodiment of the present invention is applied to a drive device that includes a rotating electrical machine and an inverter device that is disposed above the rotating electrical machine and transfers power to and from the rotating electrical machine. In this drive device, the rotating electrical machine has a rotating electrical machine housing, the rotating electrical machine housing is formed with a flow path on the rotating electrical machine side through which a refrigerant flows, and the inverter device has a lid-shaped inverter housing, and an inner surface of the inverter housing. Electrical components are arranged toward the rotating electrical machine side, and the inverter housing is fixed to the rotating electrical machine housing to form a storage chamber in which the electrical components are housed between the inverter housing and the rotating electrical machine housing. In this case, an inverter-side flow path through which the refrigerant flows is formed. The rotating electric machine side flow path and the inverter side flow path are connected through the contact surface where the rotating electric machine housing and the inverter housing touch, and the inverter side flow path is straight in the direction away from the connecting part with the rotating electric machine side flow path. The inverter includes a first flow path that extends in a shape, and a second flow path that branches off from the first flow path and circulates within the inverter housing. The end of the first flow path is formed as an opening penetrating the upper surface of the inverter housing, and the end is provided with a removable closing member that closes the opening.

According to the present invention, in a configuration in which electrical components are arranged at the lower part of the lid-shaped inverter housing and a storage chamber is formed between the lid-shaped inverter housing and the rotating electrical machine housing, the first inverter side flow path is the rotating electrical machine side flow path. The first flow path is connected to the first flow path and extends in a straight line. A removable closing member is provided at the end of the first flow path. With this configuration, when removing the inverter device, it is possible to attach a rod-shaped sealing jig to block the first flow path instead of the blocking member, and to prevent cooling water from flowing out, it is possible to attach a rod-shaped sealing jig to the first flow path. The refrigerant flow path can be blocked. This makes it possible to realize a configuration that more reliably prevents cooling water from dripping from the inverter side flow path when the inverter device is removed, making it possible to suppress deterioration of insulation properties caused by cooling water. .

FIG. 1 is a sectional view of a drive device according to an embodiment of the present invention. FIG. 2 is a sectional view of the main parts of the drive device. FIG. 3 is an explanatory diagram when attaching a sealing jig. FIG. 4 is an explanatory diagram after the sealing jig is inserted. FIG. 5 is an explanatory diagram when removing the inverter device. FIG. 6 is an explanatory diagram of the sealing jig. FIG. 7 is a sectional view of the periphery of the drive device.

Hereinafter, embodiments of the present invention will be described with reference to the drawings and the like.

FIG. 1 is a configuration diagram of a drive device 1 according to an embodiment of the present invention.

The drive device 1 includes a power conversion (inverter) device 10, a generator (first rotating electrical machine) 21, and a motor (second rotating electrical machine) 22. The drive device 1 is mounted on a hybrid vehicle, and receives power from a battery (not shown) to drive a motor 22, thereby causing the hybrid vehicle to travel.

The generator 21 is driven by an engine (not shown) to generate electricity. The motor 22 rotates drive wheels via an axle 24 to drive the hybrid vehicle. The motor 22 also functions as a generator that generates regenerative power when the hybrid vehicle is decelerated.

These generator 21 and motor 22 are provided within a rotating electric machine housing 31. The rotating electric machine housing 31 is formed with a cylindrical first housing chamber 311 and a second housing chamber 312 in which the generator 21 and the motor 22 are housed, respectively. A rotating electrical machine side flow path 41 through which cooling water circulates is formed in the rotating electrical machine housing 31 .

The generator 21 is configured such that a stator 211 and a rotor 212 are housed in an inner housing 32. By housing this inner housing 32 in the first housing chamber 311, the generator 21 is housed in the rotating electric machine housing 31. A gap is formed between the inner housing 32 and the first housing chamber 311 of the rotating electric machine housing 31. This gap functions as a generator-side cooling water flow path 42 for cooling the generator 21, and constitutes a part of the rotating electrical machine side flow path 41.

Similarly, the motor 22 is configured such that a stator 221 and a rotor 222 are housed in an inner housing 33. By housing this inner housing 33 in the second housing chamber 312, the motor 22 is housed in the rotating electric machine housing 31. A gap is formed between the inner housing 33 and the second housing chamber 312 of the rotating electrical machine housing 31. This gap functions as a motor-side cooling water flow path 43 for cooling the motor 22, and constitutes a part of the rotating electric machine side flow path 41. A communication path is provided between the generator-side cooling water flow path 42 and the motor-side cooling water flow path 43 to communicate them.

The rotating electrical machine housing 31 includes a cooling water inlet passage 44 through which cooling water flows from the inverter housing 11 and a cooling water outlet 40 through which cooling water flows out to the outside of the rotating electrical machine housing 31. The cooling water inlet passage 44 communicates with the motor side cooling water flow path 43. The generator-side cooling water flow path 42 communicates with the cooling water outlet 40 . As will be described later, the cooling water inlet passage 44 opens to the contact surface 100 of the inverter housing 11 and communicates with the inverter side flow passage 61.

As described above, the rotating electric machine housing 31 has a cooling water inlet passage 44, a motor side cooling water passage 43, a generator side cooling water passage 42, and a cooling water outlet 40, which supply cooling water into the rotating electric machine housing 31. It is configured as a rotating electric machine side flow path 41 for circulation.

The inverter device 10 includes an inverter housing 11 and electrical components 12 including a power module, a capacitor, and the like.

The inverter housing 11 has a box shape with its outer edge extending toward the rotating electric machine housing 31 and opening downward. The inverter housing 11 includes an upper surface portion 11b and a peripheral portion 11a (side wall) extending downward from the outer edge of the upper surface portion 11b. The inverter housing 11 covers the rotating electrical machine housing 31 like a lid and is fixed to the rotating electrical machine housing 31 by bolting or the like. When the inverter housing 11 is fixed to the rotating electric machine housing 31, a space formed by the inner surface of the inverter housing 11 and the upper recess 31a of the rotating electric machine housing 31 is configured as a housing chamber 101 that accommodates the electrical components 12. Ru. The inverter housing 11 is formed with an inverter-side flow path 61 through which cooling water flows.

The electrical component 12 is a component that controls the operation of the inverter device 10, and is composed of a power module, a capacitor module, and the like. The electrical component 12 is arranged on the inner surface of the inverter housing 11 so as to face the recess 31a of the rotating electric machine housing 31, and is housed in the housing chamber 101.

The end of the peripheral portion 11a of the inverter housing 11 is configured as a contact surface 100, and is in contact with the end of the rotating electric machine housing 31. An end of a first flow path 161 of the inverter side flow path 61 opens at the contact surface 100 . The rotary electric machine housing 31 in contact with the contact surface 100 has an open end of the cooling water inlet passage 44 of the rotary electric machine side flow passage 41, and the first flow passage 161 of the inverter side flow passage 61 and the cooling water inlet passage 44 and are connected. An O-ring 44b (see FIG. 2) is arranged around the cooling water inlet passage 44 of the rotating electric machine housing 31. With such a configuration, a connecting portion where the rotating electric machine side flow path 41 and the inverter side flow path 61 are connected is formed on the contact surface 100 of the inverter housing 11.

Next, the configuration of the inverter side flow path 61 will be explained in more detail.

FIG. 2 is a cross-sectional view illustrating the inverter-side flow path 61 at the contact surface 100.

The inverter side flow path 61 is composed of a first flow path 161 and a second flow path 261. The first flow path 161 extends linearly in a direction away from the connecting portion with the rotating electrical machine side flow path 41 . The second flow path 261 is arranged within the inverter housing 11 so that the cooling water flowing in from the cooling water inlet 262 (see FIG. 1) circulates, and is bent and communicated with the first flow path 161.

The end of the first flow path 161 on the side away from the contact surface 100 is formed as an opening 162 that penetrates the upper surface 11b of the inverter housing 11. A closing member 163 is fixed to the opening 162 .

The closing member 163 has a flange portion 163a formed at the end on the upper surface portion 11b side, a threaded portion 163b formed with a male thread, and an O-ring 164 attached between the flange portion 163a and the threaded portion 163b. The hexagonal hole 163d is formed on the upper surface side of the flange portion 163a. Furthermore, a female thread is formed on the inner periphery of the opening 162.

The opening 162 is closed by screwing the closing member 163 to the opening 162 of the first flow path 161. The closing member 163 is attached to and removed from the opening 162 by inserting a tool into the hexagonal hole 163d and rotating it. In this way, the closing member 163 is removably attached to the opening 162.

The second flow path 261 branches from a midway position of the first flow path 161. The second flow path 261 is formed to penetrate from the side surface of the inverter housing 11 in a direction perpendicular to the first flow path 161 . The opening of the second flow path 261 on the side surface of the inverter housing 11 is closed by attaching the plug 265. The second flow path 261 is formed to circulate within the inverter housing 11, and its end communicates with a cooling water inlet 262 (see FIG. 1) provided in the inverter housing 11.

With such a configuration, in the drive device 1, the cooling water that flows in from the cooling water inlet 262 (see FIG. 1) provided in the inverter housing 11 flows into the second flow path 261 and circulates inside the inverter housing 11. do. The cooling water that has flowed into the second flow path 261 flows into the first flow path 161 that is bent and extended from the second flow path 261 . The cooling water flows into the rotating electrical machine side channel 41 provided in the rotating electrical machine housing 31 via the cooling water inlet passage 44 extending linearly from the first channel 161 . The cooling water circulates through the rotating electric machine side flow path 41 to cool the motor 22 and the generator 21 . The cooling water then flows out of the rotating electrical machine housing 31 from a cooling water outlet 40 (see FIG. 1) provided in the rotating electrical machine housing 31.

Next, maintenance of the inverter device 10 in the drive device 1 will be explained.

When performing maintenance on the inverter device 10, the inverter device 10 may be removed from the drive device 1. When the inverter housing 11 is removed from the rotating electric machine housing 31, the first flow path 161 of the inverter side flow path 61 is separated from the cooling water inlet passage 44 of the rotating electric machine side flow path 41. The cooling water remaining in 61 may drip downward. Electrical components 12 of the inverter device 10 are arranged on the inner surface of the inverter housing 11 and exposed to the rotating electric machine housing 31 side. Therefore, there is a possibility that the cooling water dripping from the inverter-side flow path 61 may adhere to the electrical component 12 . This may cause problems with the insulation of the electrical component 12.

In order to prevent this, it is conceivable to construct the inverter housing in a box shape that covers the entire electrical components so that cooling water does not adhere to the electrical components when the inverter device is removed. However, in such a configuration, a new problem arises in that the size and weight of the inverter device increase.

In this embodiment, as described below, the inverter device 10 is configured to be able to suppress deterioration in insulation properties caused by cooling water during maintenance of the inverter device while suppressing an increase in the size and weight of the inverter device 10.

As described above, the linear first flow path 161 of the inverter side flow path 61 is provided with an opening 162 that penetrates the upper surface portion 11b of the inverter housing 11. A closing member 163 is removably attached to the opening 162.

Taking advantage of this, prior to maintenance of the inverter device 10, the closing member 163 is removed, a sealing jig 200 as shown in FIG. 6 is attached to the opening 162, and the first The flow path 161 and the cooling water inlet passage 44 of the rotating electrical machine side flow path 41 are each closed.

3, 4, and 5 are explanatory diagrams when the sealing jig 200 of this embodiment is attached to the opening 162.

As described above, before removing the inverter device 10, the closing member 163 is first removed from the opening 162. Next, as shown in FIG. 3, a rod-shaped sealing jig 200 is inserted into the opening 162 instead of the closing member 163.

Since a male thread is formed around the base of the sealing jig 200 like the closing member 163, by screwing the sealing jig 200 into the opening 162, the opening 162 becomes the sealing jig. 200 is closed. In this state, as shown in FIG. 4, the first seal member 201 and the second seal member 202 provided at the tip of the sealing jig 200 are connected to the cooling water inlet passage 44 of the rotating electric machine side flow path 41. , and the first flow path 161 of the inverter side flow path 61, and the openings at the connecting portions of these flow paths are closed.

With the connection portions between the rotating electric machine side flow path 41 and the inverter side flow path 61 closed in this manner, the inverter device 10 is removed as shown in FIG. When the inverter device 10 is removed, the first seal member 201 of the sealing jig 200 is separated from the second seal member 202. The separated first seal member 201 remains in a state where the cooling water inlet passage 44 of the rotating electric machine side flow passage 41 is closed.

FIG. 6 is an explanatory diagram of the sealing jig 200.

The sealing jig 200 is composed of a plug 210, a first seal member 201, and a second seal member 202. The plug 210 is a rod-shaped member, and has a flange portion 210a, a groove portion 210b, a thread forming portion 210c, and an extension portion 210d formed from the root portion. The flange portion 210a is formed to be larger than the opening diameter of the opening 162, and performs positioning when the sealing jig 200 is screwed into the opening 162. An O-ring 220 is fitted into the groove 210b to seal the opening 162 when the sealing jig 200 is attached to the opening 162. Threaded portion 210c is screwed onto the internal thread of opening 162.

The extension part 210d is formed to have a smaller diameter than the thread forming part 210c, and the second seal member 202 is fixed to the tip 210e of the extension part 210d. The first seal member 201 is fixed to the distal end side of the second seal member 202 . The second seal member 202 and the first seal member 201 are made of an elastic member such as rubber, and have an outer diameter slightly larger than the inner diameter of the first flow path 161 and the cooling water inlet passage 44. Ru. This prevents the cooling water from leaking when inserted into the first flow path 161 and the cooling water inlet passage 44.

The first seal member 201 is separably fixed to the distal end side of the second seal member 202 with glue, adhesive, or the like. The first seal member 201 and the second seal member 202 are configured to be easily separated when the inverter device 10 is removed from the drive device 1.

The first seal member 201 has a tip portion configured as a small diameter portion 201a having a smaller diameter than the outer diameter of the base portion (the side in contact with the second seal member 202).

More specifically, as shown in FIG. 2, the cooling water inlet passage 44 of the rotating electrical machine side passage 41 is formed to have the same inner diameter as the first passage 161 of the inverter side passage 61 at the connecting portion. It has a stepped portion 44a formed so that the inner diameter is reduced at a position spaced apart from the connecting portion. By engaging the small diameter portion 201a with this stepped portion 44a, the first seal member 201 is positioned in the insertion direction with respect to the cooling water inlet passage 44. Furthermore, even when separated from the second seal member 202, the first seal member 201 can remain in the cooling water inlet passage 44 of the rotating electric machine side flow path 41.

With this configuration, when the inverter device 10 is removed from the drive device 1, the first flow path 161 of the inverter side flow path 61 and the cooling water inlet passage 44 of the rotating electric machine side flow path 41 can be blocked. As a result, the cooling water does not adhere to the electrical components 12 of the inverter device 10, and deterioration of the insulation properties of the electrical components 12 due to the cooling water can be suppressed.

Although the cooling water inlet passage 44 is configured to have a diameter reduced at the stepped portion 44a, the present invention is not limited to this, and the cooling water inlet passage 44 may be formed in a tapered shape so that the diameter gradually decreases from the opening portion of the cooling water inlet passage 44. You can. In that case, the first seal member 201 is preferably formed into a tapered shape to match the shape of the cooling water inlet passage 44.

Next, a motor room of a hybrid vehicle in which the drive device 1 is mounted will be explained.

FIG. 7 is a sectional view including the area around the drive device 1 in the motor room of the hybrid vehicle of this embodiment.

As described above, the opening 162 of the first flow path 161 is open in the upper surface portion 11b of the inverter housing 11, and the opening 162 is closed by the closing member 163. There is no need to remove the closing member 163 except when performing maintenance on the inverter device 10, and if the closing member 163 is carelessly removed, problems such as cooling water leakage may occur.

Therefore, the closing member 163 cannot be removed unless another component in the motor room is placed near the location where the closing member 163 is placed on the upper surface portion 11b of the inverter device 10, and the component is removed according to the procedure. It was configured as follows.

As shown in FIG. 7, an air cleaner 500 connected to the intake passage of the engine is arranged above the inverter device 10. Air cleaner 500 is fixed to drive device 1 via bracket 510.

A fixing hole 111 to which a bracket 510 can be attached is formed in the upper surface portion 11b of the inverter housing 11. A bolt 511 for fixing the bracket 510 is fastened to the fixing hole 111. Bracket 510 is placed above closure member 163. Bracket 510 is placed in a position where a tool for removing closure member 163 cannot be inserted.

With this configuration, the closing member 163 can be removed by removing the air cleaner 500 according to the procedure and further removing the bracket 510 from the inverter housing 11. Therefore, the closing member 163 is prevented from being removed inadvertently. Ru.

As described above, the drive device 1 of the present embodiment includes a rotating electrical machine (generator 21, motor 22), an inverter device 10 that is disposed above the rotating electrical machine and transmits and receives electric power to and from the rotating electrical machine. Equipped with. The rotating electrical machine has a rotating electrical machine housing 31, and a rotating electrical machine side flow path 41 through which a refrigerant flows is formed in the rotating electrical machine housing 31. The inverter device 10 has a lid-shaped inverter housing 11. Electrical components 12 are arranged on the inner surface of the inverter housing 11 toward the rotating electric machine side, and the inverter housing 11 is fixed to the rotating electric machine housing 31. A housing chamber 101 in which the electrical component 12 is housed is formed between the rotary electric machine housing 31 and the rotary electric machine housing 31 . The inverter housing 11 is formed with an inverter-side flow path 61 through which a refrigerant flows. The rotating electric machine side flow path 41 and the inverter side flow path 61 are connected through the contact surface 100 where the rotating electric machine housing 31 and the inverter housing 11 are in contact, and the inverter side flow path 61 is connected to the rotating electric machine side flow path 41. The first flow path 161 extends linearly in a direction away from the portion, and the second flow path 261 branches from the first flow path 161 and circulates within the inverter housing 11. The end of the first flow path 161 is formed as an opening 162 penetrating the upper surface of the inverter housing 11, and the end is provided with a removable closing member 163 that closes the opening 162.

In this configuration, the electrical component 12 is disposed at the lower part of the lid-shaped inverter housing 11, and the storage chamber 101 is formed between the inverter housing 11 and the rotating electrical machine housing 31. 41 and extends linearly, and a closing member 163 that is detachably attached to the opening 162 is provided on the upper surface side of the first flow path 161. With such a configuration, when removing the inverter device 10, it becomes possible to attach the rod-shaped sealing jig 200 in place of the closing member 163 so as to close the first flow path 161. By using the sealing jig 200 in this manner, it is possible to close the first flow path 161 of the inverter side flow path 61 so as to prevent the cooling water from flowing out. This makes it possible to realize a configuration that more reliably prevents cooling water from dripping from the inverter side flow path 61 etc. when the inverter device 10 is removed, and it is possible to suppress deterioration of insulation properties caused by the cooling water. becomes.

Furthermore, in the present embodiment, the rotating electric machine side flow path 41 is formed to extend linearly in a direction away from the connection portion, and its inner diameter decreases as it moves away from the connection portion.

In this configuration, by inserting the first seal member 201 at the tip of the sealing jig 200 into the reduced diameter portion, the rotating electric machine side flow path 41 can be reliably closed by the first seal member 201.

Furthermore, in this embodiment, the rotating electric machine side flow path 41 has an inner diameter that is approximately the same as the inner diameter of the inverter side flow path 61 at the connecting portion, and the inner diameter of the rotating electric machine side flow path 41 at a position spaced apart from the connecting portion. It has a stepped portion 44a formed to reduce the size.

In this configuration, the first seal member 201 at the tip of the sealing jig 200 engages with the stepped portion 44a, so that the first seal member 201 can be positioned in the insertion direction, and the rotating electric machine side flow path 41 can be blocked more reliably.

Further, in this embodiment, a component (air cleaner 500) of the hybrid vehicle is arranged above the inverter device 10 in the direction in which the blocking member 163 is removed, and by removing the air cleaner 500, the blocking member 163 can be removed. become.

With this configuration, the closing member 163 cannot be removed unless the component parts are removed according to the procedure, so the closing member 163 is prevented from being removed carelessly.

Furthermore, in the present embodiment, instead of the closing member 163, the cooling water of the first flow path 161 is dripped from the connecting portion when the inverter device 10 is removed from the drive device 1. A sealing jig 200 having

seal members

201 and 202 that prevents this can be attached from the end.

In this configuration, when removing the inverter device 10, the closing member 163 is removed and the sealing jig 200 is attached, so that the sealing member of the sealing jig 200 is connected to the inverter side flow path 61 and the rotating electric machine side flow path 4. Since the connecting portion between the cooling water and the cooling water is blocked and the cooling water is prevented from dripping, deterioration of insulation properties caused by the cooling water can be suppressed when the inverter device 10 is removed.

Further, in this embodiment, the seal members include a first seal member 201 that closes the cooling water inlet passage 44 of the rotating electric machine side flow passage 41 and a second seal member 201 that closes the first flow passage 161 of the inverter side flow passage 61. It consists of a seal member 202.

In this configuration, the first sealing member 201 and the second sealing member 202 close the cooling water inlet passage 44 of the rotating electric machine side passage 41 and the first passage 161 of the inverter side passage 61, respectively. When the inverter device 10 is removed, cooling water can be prevented from dripping from both the inverter housing 11 and the rotating electric machine housing 31.

Furthermore, in this embodiment, the sealing jig 200 includes a rod-shaped plug 210 and

seal members

201 and 202, and the plug 210 has a flange portion 210a, a groove portion 210b, a thread forming portion 210c, and an extension portion 210d. The

seal members

201 and 202 are fixed to the tip 210e of the extension portion 210d.

In this configuration, since the sealing

members

201 and 202 are fixed to the tip of the rod-shaped plug 210, the sealing jig 200 is inserted into the first flow path 161 of the inverter side flow path 61 instead of the closing member 163. By doing so, the sealing member at the tip can reliably close the cooling water inlet passage 44 of the rotating electric machine side passage 41 and the first passage 161 of the inverter side passage 61.

The embodiments of the present invention and modifications thereof have been described above, but the above embodiments and modifications merely show a part of the application examples of the present invention, and the technical scope of the present invention is not limited to the above embodiments. It is not intended to be limited to specific configurations.

As mentioned above, the air cleaner 500 is exemplified as another component in the motor room disposed above the inverter device 10, but is not limited thereto. Any component may be placed in the motor room as long as it is not a component that is mechanically connected to the drive device 1, such as a fuse box or a 12V battery.

In the present embodiment, an electric vehicle that runs using the driving force of the motor 20 has been described, but the invention is not limited to this, and a drive system for a hybrid vehicle equipped with an engine and that runs using the driving force of the engine and the driving force of the motor can also be used. Similarly applicable.

Claims

A drive device comprising a rotating electrical machine and an inverter device disposed above the rotating electrical machine and transmitting and receiving electric power to and from the rotating electrical machine,
The rotating electrical machine has a rotating electrical machine housing, and the rotating electrical machine housing is formed with a rotating electrical machine side flow path through which a refrigerant flows;
The inverter device has a lid-shaped inverter housing, and electrical components are disposed on the inner surface of the inverter housing toward the rotating electrical machine, and the inverter housing is fixed to the rotating electrical machine housing so that the inverter housing is connected to the inverter housing. A housing chamber in which the electrical component is housed is formed between the rotary electric machine housing, and
The inverter housing is formed with an inverter-side flow path through which a refrigerant flows;
The rotating electrical machine side flow path and the inverter side flow path are connected via a contact surface where the rotating electrical machine housing and the inverter housing are in contact,
The inverter-side flow path includes a first flow path that extends linearly in a direction away from a connecting portion with the rotating electric machine side flow path, and a flow path that branches from the first flow path and runs inside the inverter housing. A circulating second flow path,
The end of the first flow path is formed as an opening penetrating the upper surface of the inverter housing, and the end is provided with a removable closing member that closes the opening.
Drive device.
The drive device according to claim 1,
The rotating electrical machine side flow path is formed to extend linearly in a direction away from the connection portion, and has an inner diameter that decreases as it moves away from the connection portion.
Drive device.
The drive device according to claim 1,
The rotating electric machine side flow path has an inner diameter that is substantially the same as the inner diameter of the inverter side flow path at the connecting portion, and the inner diameter of the rotating electric machine side flow path is reduced at a position spaced apart from the connecting portion. having a stepped portion formed in
Drive device.
The drive device according to claim 1,
Located inside the vehicle's motor room,
Components of the vehicle are arranged above the inverter device in a direction in which the closing member is removed;
When the component is removed, the closure member becomes removable;
Drive device.
The drive device according to claim 1,
In place of the closing member, the first flow path includes a sealing member that prevents cooling water in the first flow path from dripping from the connecting portion when the inverter housing is removed from the rotating electric machine housing. A rod-shaped sealing jig having: can be attached from the end;
Drive device.
The drive device according to claim 5,
The seal member includes a first seal member that closes the connecting portion side of the rotating electric machine side flow path, and a second seal member that closes the connecting portion side of the inverter side flow path.
Drive device.
The drive device according to claim 5,
The sealing jig includes a rod-shaped plug and the sealing member, the plug having a flange portion, a groove portion, a thread forming portion, and an extension portion,
the sealing member is fixed to the tip of the extension;
Drive device.