CN113479046A

CN113479046A - Shell component of hybrid power assembly

Info

Publication number: CN113479046A
Application number: CN202110862784.9A
Authority: CN
Inventors: 王攀旭; 何文源; 唐汝琪; 曲中元; 黄伟
Original assignee: Dongfeng Nissan Passenger Vehicle Co
Current assignee: Dongfeng Nissan Passenger Vehicle Co
Priority date: 2021-07-29
Filing date: 2021-07-29
Publication date: 2021-10-08
Anticipated expiration: 2041-07-29
Also published as: CN113479046B

Abstract

The invention discloses a shell component of a hybrid power assembly, which comprises a double-motor shell, a transmission shell and a double-inverter shell; the double-motor shell is used for integrating the generator and the driving motor, and comprises a motor main shell and a motor rear end cover, the motor rear end cover is connected with the rear end face of the motor main shell, the double-motor shell comprises a generator cooling water channel and a driving motor cooling water channel, and the generator cooling water channel is connected with the driving motor cooling water channel in series; the transmission shell comprises a variable shell and an off shell, and the variable shell is connected with the front end face of the motor main shell; the double inverter housing is mounted above the double motor housing. The generator and the driving motor are designed to be in a common shell and a common water channel, and the double-motor shell and the transmission shell are designed to be in a common end cover, so that the structure of a shell component of the hybrid power assembly is more compact, and the requirement of arranging a double-motor hybrid power assembly with higher power in the space of a front engine room carrying a four-cylinder engine can be met.

Description

Shell component of hybrid power assembly

Technical Field

The invention relates to the technical field of automobiles, in particular to a shell component of a hybrid power assembly.

Background

The P1+ P3 double-motor hybrid power assembly which is proposed in the market at present is gradually increased, the power of the motor is continuously increased, but the transverse arrangement space in the front cabin of the traditional fuel vehicle is very limited, so that the following problems exist:

1) if the motor adopts a water cooling scheme, the power of the generator and the driving motor is ensured to be larger, and the generator and the driving motor are difficult to be arranged at the same time; if the arrangement of the front engine room is required, the power of a generator and a driving motor of the front engine room is possibly limited, or a three-cylinder engine is used, so that the performance of the motor or the engine cannot be considered;

2) if the motor adopts an oil cooling scheme, the size is reduced to a certain extent, the arrangement of a front engine room is facilitated, but the motor and a transmission gear share lubricating oil, so that a complex filtering system needs to be designed to avoid the phenomenon that scrap iron generated in the meshing operation of the gear circulates to the motor to damage the function of the motor, and the after-sale maintenance is difficult; and the oil cooling technology also increases a complex cooling structure, which brings about the increase of development difficulty and cost.

Therefore, there is a need for a housing assembly for a hybrid powertrain that can compromise cooling performance and compact arrangement of the front nacelle and reduce costs.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a shell assembly of a hybrid power assembly, which can give consideration to both cooling performance and compact arrangement of a front cabin and can reduce cost.

The technical scheme of the invention provides a shell component of a hybrid power assembly, which comprises a double-motor shell, a transmission shell and a double-inverter shell;

the double-motor shell is used for integrating a generator and a driving motor, and comprises a motor main shell and a motor rear end cover, wherein the motor rear end cover is connected with the rear end face of the motor main shell, the double-motor shell comprises a generator cooling water channel and a driving motor cooling water channel, and the generator cooling water channel is connected with the driving motor cooling water channel in series;

the transmission shell comprises a variable shell and an off-shell, and the variable shell is connected with the front end face of the motor main shell;

the double inverter case is installed above the double motor case.

The exhaust unit is communicated with the transmission shell, the double-motor shell and the double-inverter shell, so that gas can enter the double-motor shell from the transmission shell and then enter the double-inverter shell from the double-motor shell to be finally exhausted.

Further, the exhaust unit includes a first exhaust assembly that communicates the transmission housing with the dual-motor housing and a second exhaust assembly that communicates the dual-motor housing with the dual-inverter housing.

Further, the first exhaust assembly comprises a first oil dam, a first vent hole, a second oil dam, a second vent hole, an oil blocking column and an exhaust hole, wherein the first oil dam, the second oil dam and the second vent hole are arranged on one side of the transmission housing and one side of the dual-motor housing;

the first vent is located at the bottom of the first oil dam on one side of the transmission case, the second vent is located at the top of the second oil dam, the second oil dam is located above the first oil dam, the oil column is located above the second oil dam on one side of the transmission case, and the exhaust hole is located above the second oil dam on one side of the dual-motor case;

when the transmission shell is connected with the double-motor shell, the oil blocking column is in butt joint with the exhaust hole, a gap is reserved between the oil blocking column and the exhaust hole, and the exhaust hole is communicated with the inside of the double-motor shell.

Further, the double inverter housing includes an inverter cooling water passage that communicates with the generator cooling water passage and the drive motor cooling water passage.

Furthermore, the inverter cooling water channel comprises a first water channel and a second water channel, a water channel connecting portion is arranged between the first water channel and the second water channel, a plurality of flow guide ribs are arranged on the inner wall of the water channel connecting portion, a water channel cover plate is fixed at the position of the water channel connecting portion through friction welding, and cooling water flows through a channel between the water channel cover plate and the flow guide ribs.

Furthermore, a sunken suspension installation area is arranged on the outer surface of the motor rear end cover, a plurality of through holes are formed in the suspension installation area, and a plurality of bolt holes corresponding to the through holes are formed in the rear end face of the motor main shell.

Further, a step portion is arranged on the front end face of the motor main shell and used for avoiding a transmission bearing chamber.

Furthermore, an oil storage cavity is arranged in the bottom of the transmission shell, an oil filling port is arranged at the top of the oil storage cavity, a hydraulic system oil inlet and a hydraulic system oil outlet are arranged at the bottom of the oil storage cavity, and a magnet is further arranged in the oil storage cavity.

Further, the outer wall of the oil storage cavity comprises a transverse part and an inclined part, the transverse part is located at the top of the oil storage cavity, and the inclined part is connected with the transverse part and gradually inclined from top to bottom.

Further, the bi-motor casing with be equipped with the high-pressure terminal box between the bi-inverter casing, the high-pressure terminal box includes high-pressure junction box lid and high-pressure outlet, and the bi-motor adopts flat copper bar and dc-to-ac converter to insert the copper bar butt joint of high-pressure outlet is fixed with the bolt, high-pressure junction box lid with the box body of high-pressure terminal box passes through the bolt and can dismantle the connection.

Furthermore, a generator wiring harness interface and a driving motor wiring harness interface are arranged on the motor rear end cover, and a low-voltage wiring harness integrated interface is arranged between the generator wiring harness interface and the driving motor wiring harness interface.

After adopting above-mentioned technical scheme, have following beneficial effect:

the generator and the driving motor are designed to be in a common shell and a common water channel, and the double-motor shell and the transmission shell are designed to be in a common end cover, so that the structure of a shell component of the hybrid power assembly is more compact, and the requirement of arranging a double-motor hybrid power assembly with higher power in the space of a front engine room carrying a four-cylinder engine can be met.

Drawings

The disclosure of the present invention will become more readily understood by reference to the drawings. It should be understood that: these drawings are for illustrative purposes only and are not intended to limit the scope of the present disclosure. In the figure:

FIG. 1 is a perspective view of a housing assembly of a hybrid powertrain in an embodiment of the present invention;

FIG. 2 is an exploded view of the housing assembly of the hybrid powertrain in one embodiment of the present invention;

FIG. 3 is a schematic illustration of a hybrid powertrain in accordance with an embodiment of the present invention;

FIG. 4 is a schematic view of an exhaust unit according to an embodiment of the present invention;

FIG. 5 is a schematic illustration of a first exhaust assembly on one side of a transmission housing in accordance with an embodiment of the present invention;

FIG. 6 is a schematic diagram of a first exhaust assembly on one side of a dual motor housing in accordance with an embodiment of the present invention;

FIG. 7 is a cross-sectional view at a first exhaust assembly in an embodiment of the present invention;

FIG. 8 is a schematic view of a dual motor housing and suspension bracket after installation in accordance with an embodiment of the present invention;

FIG. 9 is an enlarged view of a portion of one embodiment of the present invention after the dual motor housing and the suspension bracket are mounted;

FIG. 10 is a schematic view of the rear end face of the motor main housing in one embodiment of the invention;

FIG. 11 is a schematic view of the front face of the motor main housing in one embodiment of the invention;

FIG. 12 is a schematic illustration of the transmission housing interfacing with a dual motor housing in an embodiment of the present invention;

FIG. 13 is a cross-sectional view of a reducer bearing and step in accordance with an embodiment of the present invention;

FIG. 14 is a schematic view of the variable case side of the oil reservoir chamber in accordance with an embodiment of the present invention;

FIG. 15 is a schematic diagram of the off-shell side of the oil reservoir chamber in accordance with an embodiment of the present invention;

FIG. 16 is a schematic view of the internal structure of the dual motor housing and the inverter housing in an embodiment of the present invention;

FIG. 17 is a schematic view of a high voltage junction box in accordance with an embodiment of the present invention;

FIG. 18 is an enlarged partial view of a patch panel in accordance with an embodiment of the present invention;

FIG. 19 is an enlarged view of a portion of a high voltage junction box in accordance with an embodiment of the present invention;

FIG. 20 is a schematic of the outer side of the rear end cap of the motor in one embodiment of the invention;

FIG. 21 is a schematic illustration of the inside face of the rear end cap of the motor in one embodiment of the invention;

FIG. 22 is a schematic view of a rear end cap and connector of the motor in accordance with one embodiment of the present invention;

FIG. 23 is a transverse cross-sectional view of an inverter cooling gallery of an inverter housing in accordance with an embodiment of the present invention;

fig. 24 is a longitudinal sectional view of an inverter cooling water passage of an inverter case according to an embodiment of the present invention;

FIG. 25 is a cross-sectional view of an embodiment of the present invention at the location of the guide ribs;

FIG. 26 is a cross-sectional view of a waterway cover plate in accordance with an embodiment of the present invention.

Reference symbol comparison table:

double-motor housing 1: the water inlet structure comprises a motor main shell 11, a bolt hole 111, a step part 112, a motor rear end cover 12, a generator wiring harness interface 121, a driving motor wiring harness interface 122, a low-voltage wiring harness integration interface 123, a suspension mounting area 13, a through hole 14, a first water inlet 15 and a first water outlet 16;

the transmission case 2: the variable shell 21, the off-shell 22, the oil storage cavity 23, the oil filling port 231, the hydraulic system oil inlet 232, the hydraulic system oil outlet 233, the transverse part 234, the inclined part 235 and the adsorption cavity 236;

double inverter case 3: the water channel structure comprises a first water channel 31, a second water channel 32, a water channel connecting part 33, an inverter top cover 34, an inverter main shell 35, an inverter bottom cover 36, an inverter positioning hole 37, a flow guide rib 331 and a water channel cover plate 332;

the exhaust unit 4: a first exhaust assembly 41, a second exhaust assembly 42, a first oil dam 411, a first vent 412, a second oil dam 413, a second vent 414, an oil blocking column 415, and an exhaust hole 416;

high-voltage junction box 5: a high-voltage wire box cover 51, a high-voltage wire outlet 52 and a motor positioning hole 53;

a flat copper bar 6;

the generator 10, the driving motor 20, the suspension bracket 30, the reducer bearing 40 and the connector 50.

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings.

It is easily understood that according to the technical solution of the present invention, those skilled in the art can substitute various structures and implementation manners without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical aspects of the present invention, and should not be construed as limiting or restricting the technical aspects of the present invention.

The terms of orientation of up, down, left, right, front, back, top, bottom, and the like referred to or may be referred to in this specification are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed correspondingly according to the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms.

In some embodiments of the present invention, as shown in fig. 1-3, the housing assembly of the hybrid powertrain includes a dual motor housing 1, a transmission housing 2, and a dual inverter housing 3;

the double-motor shell 1 is used for integrating a generator 10 and a driving motor 20, the double-motor shell 1 comprises a motor main shell 11 and a motor rear end cover 12, the motor rear end cover 12 is connected with the rear end face of the motor main shell 11, the double-motor shell 1 comprises a generator cooling water channel and a driving motor cooling water channel, and the generator cooling water channel is connected with the driving motor cooling water channel in series;

the transmission shell 2 comprises a variable shell 21 and an off shell 22, and the variable shell 21 is connected with the front end face of the motor main shell 11;

the double inverter case 3 is mounted above the double motor case 1.

Specifically, the double-motor shell 1 comprises two parts, namely a motor main shell 11 and a motor rear end cover 12, and the double-motor shell 1 in the invention omits a motor front end cover and a common end cover with the transmission shell 2, thereby being beneficial to reducing the occupied space of a shell assembly. The generator 10 and the driving motor 20 can be accommodated in the double-motor housing 1, so that the two motors share one housing, and the occupied space is further reduced. In addition, the double-motor shell 1 comprises a generator cooling water channel and a driving motor cooling water channel, and the generator cooling water channel and the driving motor cooling water channel are connected in series, so that the two motors jointly cool the water channels, and the occupied space is reduced.

The transmission shell 2 comprises a variable shell 21 and an off shell 22, the variable shell 21 is connected with the front end face of the motor main shell 11, the transmission shell 2 is oil-cooled, an oil seal is arranged between an inner cavity of the transmission shell 2 and an inner cavity of the double-motor shell 1, and cooling oil cannot enter the double-motor shell 1;

the double inverter case 3 is mounted above the double motor case 1, and as shown in fig. 2, the double inverter case 3 includes an inverter top cover 34, an inverter main case 35, and an inverter bottom cover 36, the inverter top cover 34 covers the inverter main case 35, the inverter bottom cover 36 is connected to a lower portion of the inverter main case 35, and the inverter bottom cover 36 is connected to an upper portion of the double motor case 1.

In this embodiment, the double-motor housing 1 and the transmission housing 2 share the end cover, so that the size in the Y direction can be shortened, and meanwhile, the generator and the driving motor share the housing and share the water channel, so that the structure of the housing assembly of the hybrid power assembly is more compact, and the requirement of arranging the double-motor hybrid power assembly with higher power in the space of the front engine room carrying the four-cylinder engine can be met.

In some embodiments of the present invention, as shown in fig. 4, the present invention further includes an exhaust unit 4, and the exhaust unit 4 communicates the transmission housing 2, the dual-motor housing 1 and the dual-inverter housing 3, so that gas can enter the dual-motor housing 1 from the transmission housing 2, and then enter the dual-inverter housing 3 from the dual-motor housing 1 for final exhaust.

The existing transmission shell adopts an independent exhaust port, and a motor cavity is communicated with an inverter cavity and shares one exhaust port. In the present embodiment, the exhaust unit 4 is made to communicate with the transmission case 2, the dual-motor case 1, and the dual-inverter case 3, so that the three cases share one exhaust unit 4, and the exhaust unit 4 only realizes the circulation of gas from the transmission case 2 to the dual-motor case 1, but oil in the transmission case 2 does not enter the dual-motor case 1.

Further, as shown in fig. 4, the exhaust unit 4 includes a first exhaust assembly 41 and a second exhaust assembly 42, the first exhaust assembly 41 communicating the transmission case 2 with the double motor case 1, and the second exhaust assembly 42 communicating the double motor case 1 with the double inverter case 3.

Specifically, as shown in fig. 5 to 7, the first exhaust assembly 41 includes a first oil dam 411, a first vent 412, a second oil dam 413, a second vent 414, an oil blocking column 415, and an exhaust hole 416, and the first oil dam 411, the second oil dam 413, and the second vent 414 are disposed on one side of the transmission housing 2 and one side of the dual-motor housing 1;

the first vent 412 is located at the bottom of the first oil dam 411 at one side of the transmission case 2, the second vent 414 is located at the top of the second oil dam 413, the second oil dam 413 is located above the first oil dam 411, the oil blocking column 415 is located above the second oil dam 413 at one side of the transmission case 2, and the exhaust hole 416 is located above the second oil dam 413 at one side of the dual-motor case 1;

when the transmission case 2 is connected to the double-motor case 1, the oil blocking column 415 is abutted to the air vent 416 with a gap therebetween, and the air vent 416 is communicated with the inside of the double-motor case 1.

First exhaust assembly 41 all is equipped with in transmission housing 2 and bi-motor housing 1's both sides, and first exhaust assembly 41 can realize the air-through between transmission housing 2 and bi-motor housing 1, realizes sealed of fluid simultaneously, prevents that fluid from entering into bi-motor housing 1.

As shown in fig. 5, the first exhaust component 41 includes a first oil dam 411, a first vent 412, a second oil dam 413, a second vent 414, and an oil dam 415 on one side of the transmission housing 2, the first vent 412 is located at the bottom of the first oil dam 411, gas enters from the first vent 412 to the top of the first oil dam 411, the second vent 414 is located at the top of the second oil dam 413, and gas enters from the top of the first oil dam 411 to the second vent 414 and from the second vent 414 to the top of the second oil dam 413. A small portion of the oil in the transmission housing 2 enters the first dam 411 through the first vent 412 and a small portion of the oil enters the second dam 413 through the second vent 414, reducing the entrance of the oil above the second dam 413.

As shown in fig. 6, at one side of the dual motor case 1, the first exhaust assembly 41 includes a first oil dam 411, a second oil dam 413, a second vent 414, and an exhaust hole 416, and the position of the exhaust hole 416 corresponds to the position of the oil blocking column 415.

As shown in fig. 7, a gap is left between the air vent 416 and the oil blocking column 415, and the gap is convenient for blocking oil and convenient for allowing air to enter the dual-motor case 1 through the air vent 416.

Further, the double inverter case 3 includes an inverter cooling water passage that communicates with the generator cooling water passage and the drive motor cooling water passage.

Specifically, as shown in fig. 16, a first water inlet 15 and a first water outlet 16 are provided on the double-motor housing 1, a second water inlet 37 and a second water outlet 38 are provided on the double-inverter housing 3, cooling water flows into the double-motor housing 1 from the first water inlet 15 and then flows out from the first water outlet 16, the first water outlet 16 is connected to the second water inlet 37, the cooling water flows into an inverter cooling water channel of the double-inverter housing 3 from the second water inlet 37 and then flows out from the second water outlet 38, and the second water outlet 38 is connected to the first water inlet 15.

The cooling water channels of the double-motor shell 1 and the double-inverter shell 3 are integrated, so that the structure is more compact. The power density is further increased.

In some embodiments of the present invention, as shown in fig. 23 to 26, the inverter cooling water channel includes a first water channel 31 and a second water channel 32, a water channel connection portion 33 is disposed between the first water channel 31 and the second water channel 32, a plurality of flow guide ribs 331 are disposed on an inner wall of the water channel connection portion 33, a water channel cover plate 332 is fixed to the water channel connection portion 33 by friction welding, and the cooling water flows through a passage between the water channel cover plate 332 and the flow guide ribs 331.

Specifically, as shown in fig. 23, the inverter cooling water channel includes a first water channel 31 and a second water channel 32, a water channel connection portion 33 is disposed between the first water channel 31 and the second water channel 32, the cooling water flows into the water channel connection portion 33 from the first water channel 31, and then flows into the second water channel 32 from the water channel connection portion 33, and the water channel connection portion 33 guides the cooling water into multiple water streams, so that the water streams are prevented from being disturbed and flowing back, pressure loss of the water channel is reduced, and a cooling effect is improved.

As shown in fig. 24, a plurality of flow guiding ribs 331 are provided above the waterway connection portion 33, and a waterway cover plate 332 is provided below the waterway connection portion.

As shown in fig. 25, water diversion channels are formed between adjacent flow guide ribs 331, and four water diversion channels are formed by three flow guide ribs 331.

As shown in fig. 26, a plurality of grooves are also formed in the waterway cover plate 332 corresponding to the water diversion channels, and the waterway cover plate 332 is welded to the edges of the first waterway 31 and the second waterway 32 by friction welding, so that compared with a bolt fixing mode, the installation space of bolts and sealing rings is reduced, and the tightness of the waterway is also guaranteed.

In some embodiments of the present invention, as shown in fig. 1 and 8-10, a recessed suspension mounting region 13 is disposed on an outer surface of the motor rear end cover 12, the suspension mounting region 13 is provided with a plurality of through holes 14, and a plurality of bolt holes 111 corresponding to the through holes are disposed on a rear end surface of the motor main casing 11.

Specifically, as shown in fig. 1, a recessed suspension mounting region 13 is provided on an outer surface of the motor rear end cover 12, and the suspension mounting region 13 is used for mounting a suspension bracket 30, so that the Y-direction occupation is reduced; the bolts are screwed in the Y direction, so that more suspension arrangement spaces are released, and the area for arranging the bolts is larger; the Y-direction dimension of the suspension bracket is shorter, and the assembly form is favorable for improving the suspension stress.

As shown in fig. 8-9, the suspension bracket 30 is in a state after being bolted to the motor rear cover 12.

As shown in fig. 10, a plurality of bolt holes 111 corresponding to the through holes are formed in the rear end surface of the motor main casing 11, and the bolts sequentially penetrate through the suspension bracket 30 and the motor rear end cover 12 from outside to inside and are fixedly connected with the bolt holes 111.

In some embodiments of the present invention, as shown in fig. 11 to 13, a step portion 112 is provided on the front end surface of the motor main casing 11, and the step portion 112 is used for avoiding the transmission bearing chamber.

Because the front end cover of the motor is cancelled, the cost can be reduced and the Y-direction length can be further reduced; however, when the transmission case 2 is directly connected to the motor main case 11 of the double motor case 1, the reduction gear bearing 40 easily interferes with the motor main case 11. Therefore, the stepped step part 112 is formed on the front end face of the motor main shell 11 and is used for locally avoiding the reducer bearing 40, so that the joint surface between the transmission shell 2 and the double-motor shell 1 is sealed, the length of a water channel is ensured not to be shortened as much as possible, and the Y-direction space utilization rate of the shell assembly of the hybrid power assembly is improved to the maximum extent.

In some embodiments of the present invention, as shown in fig. 14-15, an oil storage chamber 23 is provided in the bottom of the transmission housing 2, an oil filling port 231 is provided at the top of the oil storage chamber 23, a hydraulic system oil inlet 232 and a hydraulic system oil outlet 233 are provided at the bottom of the oil storage chamber 23, and a magnet is further provided in the oil storage chamber 23.

Specifically, as shown in fig. 14, the structure of the oil reservoir 23 on the variable shell 21 side is: the top of the oil storage cavity is provided with an oil filling port 231, and oil enters the oil storage cavity 23 from the oil filling port 231; the bottom of the oil storage cavity 23 is provided with a hydraulic system oil inlet 232 and a hydraulic system oil outlet 233, so that oil can circularly flow in the oil storage cavity 23 when the clutch oil pump works; the oil storage chamber 23 is further provided with an adsorption chamber 236, and the adsorption chamber 236 is provided with a magnet (not shown) for adsorbing iron filings in the oil.

As shown in fig. 15, the structure of the oil storage chamber 23 on the side of the off-case 22 is: the top of the shell is provided with an oil filling port 231, and the oil filling port 231 on the side of the shell 22 and the oil filling port 231 on the side of the variable shell are spliced to form a complete oil filling port; the oil storage chamber 23 is provided with an adsorption chamber 236, which forms a complete adsorption chamber 236 with the split of the transformer shell side, fixes the magnet therein, and holds the adsorbed iron pieces in the adsorption chamber 236.

Further, as shown in fig. 14 to 15, the outer wall of the oil storage chamber 23 includes a lateral portion 234 and an inclined portion 235, the lateral portion 234 being located at the top of the oil storage chamber 23, the inclined portion 235 being connected to the lateral portion 234 and gradually inclined from top to bottom.

The oil fill port 231 is open at the transverse portion 234, and the transverse portion 234 is disposed generally in the transverse direction and is slightly recessed downward to facilitate entry of oil into the oil fill port 231.

The inclined portion 235 is inclined from top to bottom, facilitating the introduction of the oil liquid that does not enter the oil filler 231 to the bottom of the transmission case 2.

The inside of derailleur casing 2 sets up clutch cavity and oil storage cavity 23, and oil storage cavity 23 is used for clutch hydraulic system oil internal circulation, can guarantee clutch hydraulic system's oil consumption at different angles, guarantees that the engine directly drives the function.

In some embodiments of the present invention, as shown in fig. 16 to 19, a high voltage terminal box 5 is disposed between the dual motor housing 1 and the dual inverter housing 3, the high voltage terminal box 5 includes a high voltage terminal box cover 51 and a terminal board 52, the dual motor and the inverter are electrically connected through a flat copper bar 6, the flat copper bar 6 penetrates the terminal board 52, and the high voltage terminal box cover 51 and the terminal board 52 are detachably connected through a bolt.

Specifically, as shown in fig. 16, the double motors are electrically connected to the inverter through the plurality of flat copper bars 6, the protruding portions of the flat copper bars 6 are bent to reduce the occupation of Y-direction dimensions, and the three-phase outgoing line positions can be locked by the positioning clamp plate.

As shown in fig. 17, the high-voltage junction box 5 includes a high-voltage junction box cover 51 and a high-voltage outlet 52, the double motors are connected with the copper bar inserted into the high-voltage outlet 52 by the flat copper bar 6 and the inverter in a butt joint manner and fixed by bolts, and the high-voltage junction box cover 51 is detachably connected with the box body of the high-voltage junction box 5 by bolts, so that the flat copper bar 6 can be maintained and replaced conveniently.

As shown in fig. 18, the high-voltage terminal box 5 is further provided with a motor positioning hole 53, and the motor positioning hole 53 is used for positioning with the dual-motor housing 1, so that the high-voltage terminal box 5 is conveniently connected with the dual-motor housing 1.

As shown in fig. 19, the inverter housing 3 is further provided with an inverter positioning hole 37, and the inverter positioning hole 37 is used for positioning with the inverter housing 3 to facilitate connection of the high-voltage junction box 5 with the inverter housing 3.

The double-motor three-phase outgoing line junction box is integrated, so that the number of cover plates is reduced, and the continuity of a sealing surface is improved; and realize that the lead-out wire terminal is pre-fixed, prevent to attach together the process with the dc-to-ac converter and take place the terminal landing, improve the anti-vibration reliability of copper bar junction simultaneously.

In some embodiments of the present invention, as shown in fig. 20 to 22, a generator harness interface 121 and a driving motor harness interface 122 are disposed on the motor rear end cover 12, and a low voltage harness integrated interface 123 is disposed between the generator harness interface 121 and the driving motor harness interface 122.

Specifically, as shown in fig. 20, the outer side surface of the motor rear end cover 12 is an outer side surface, the motor harness interface 121 is used for allowing the generator rotary transformer harness to enter the dual-motor housing 1 from the opening, the driving motor harness interface 122 is used for allowing the driving motor rotary transformer harness to enter the dual-motor housing 1 from the opening, and the dual-motor rotary transformer harness passes through the motor rear end cover 12 to be led out, so that convenience of rotary transformer zero adjustment is realized. The low voltage harness integration interface 123 is disposed between the generator harness interface 121 and the drive motor harness interface 122.

As shown in fig. 21, is the inner side surface of the motor rear cover 12.

As shown in fig. 22, an integrated 16Pin connector 50 is connected to the low-voltage harness integration interface 123, and the low-voltage harnesses of the two motors are all connected to the connector 50, so that the integration is further improved, the EMC performance is improved by centralized shielding, and the sealing port of the connector 50 is reduced.

By skillfully arranging the shell components, the double-motor hybrid power assembly shell can meet the requirement of arranging a double-motor hybrid power assembly with higher power in the space of a front engine room carrying a four-cylinder engine on the premise of high reliability and low maintenance cost, and is a high-cost-performance hybrid power assembly shell solution.

The foregoing is considered as illustrative only of the principles and preferred embodiments of the invention. It should be noted that, for those skilled in the art, several other modifications can be made on the basis of the principle of the present invention, and the protection scope of the present invention should be regarded.

Claims

1. A shell component of a hybrid power assembly is characterized by comprising a double-motor shell (1), a transmission shell (2) and a double-inverter shell (3);

the double-motor shell (1) is used for integrating a generator (10) and a driving motor (20), the double-motor shell (1) comprises a motor main shell (11) and a motor rear end cover (12), the motor rear end cover (12) is connected with the rear end face of the motor main shell (11), the double-motor shell (1) comprises a generator cooling water channel and a driving motor cooling water channel, and the generator cooling water channel is connected with the driving motor cooling water channel in series;

the transmission shell (2) comprises a variable shell (21) and an off-shell (22), and the variable shell (21) is connected with the front end face of the motor main shell (11);

the double inverter housing (3) is mounted above the double motor housing (1).

2. The housing assembly of a hybrid powertrain according to claim 1, further comprising an exhaust unit (4), wherein the exhaust unit (4) communicates the transmission housing (2), the dual motor housing (1) and the dual inverter housing (3) to enable gas to enter the dual motor housing (1) from the transmission housing (2) and then enter the dual inverter housing (3) from the dual motor housing (1) for final exhaust.

3. The housing assembly of the hybrid powertrain according to claim 2, characterized in that the exhaust unit (4) comprises a first exhaust assembly (41) and a second exhaust assembly (42), the first exhaust assembly (41) communicating the transmission housing (2) with the dual-motor housing (1), the second exhaust assembly (42) communicating the dual-motor housing (1) with the dual-inverter housing (3).

4. The housing assembly of a hybrid powertrain according to claim 3, characterized in that the first exhaust component (41) comprises a first oil dam (411), a first vent (412), a second oil dam (413), a second vent (414), a oil dam column (415) and an exhaust vent (416), the first oil dam (411), the second oil dam (413) and the second vent (414) being provided on both the transmission housing (2) side and the dual motor housing (1) side;

the first vent (412) is located at the bottom of the first oil dam (411) at one side of the transmission case (2), the second vent (414) is located at the top of the second oil dam (413), the second oil dam (413) is located above the first oil dam (411), the oil blocking column (415) is located above the second oil dam (413) at one side of the transmission case (2), and the exhaust hole (416) is located above the second oil dam (413) at one side of the dual motor case (1);

when the transmission housing (2) is connected with the double-motor housing (1), the oil blocking column (415) is in butt joint with the exhaust hole (416) and a gap is reserved between the oil blocking column and the exhaust hole, and the exhaust hole (416) is communicated with the inside of the double-motor housing (1).

5. The hybrid powertrain housing assembly of claim 1, wherein the dual inverter housing (3) includes an inverter cooling water channel in communication with the generator cooling water channel and the drive motor cooling water channel.

6. The housing assembly of the hybrid powertrain according to claim 5, wherein the inverter cooling water channel includes a first water channel (31) and a second water channel (32), a water channel connecting portion (33) is disposed between the first water channel (31) and the second water channel (32), a plurality of flow guiding ribs (331) are disposed on an inner wall of the water channel connecting portion (33), a water channel cover plate (332) is fixed to the water channel connecting portion (33) by friction welding, and cooling water flows through a passage between the water channel cover plate (332) and the flow guiding ribs (331).

7. The housing assembly of the hybrid powertrain according to claim 1, wherein the outer surface of the motor rear cover (12) is provided with a recessed suspension mounting region (13), the suspension mounting region (13) is provided with a plurality of through holes, and the rear end surface of the motor main housing (11) is provided with a plurality of bolt holes (111) corresponding to the through holes (14).

8. The housing assembly of a hybrid powertrain according to claim 1, characterized in that a step (112) is provided on the front end face of the motor main housing (11), the step (112) being used for avoiding a transmission bearing chamber.

9. The housing assembly of the hybrid powertrain according to claim 1, wherein an oil storage chamber (23) is provided in the bottom of the transmission housing (2), an oil filling port (231) is provided at the top of the oil storage chamber (23), a hydraulic system oil inlet (232) and a hydraulic system oil outlet (233) are provided at the bottom of the oil storage chamber (23), and a magnet is further provided in the oil storage chamber (23).

10. The housing component of a hybrid powertrain according to claim 9, characterized in that the outer wall of the oil storage chamber (23) includes a lateral portion (234) and an inclined portion (235), the lateral portion (234) being located at a top of the oil storage chamber (23), the inclined portion (235) being connected to the lateral portion (234) and gradually inclined from top to bottom.

11. The housing assembly of the hybrid power assembly according to claim 1, wherein a high-voltage junction box (5) is arranged between the double-motor housing (1) and the double-inverter housing (3), the high-voltage junction box (5) comprises a high-voltage junction box cover (51) and a high-voltage outlet (52), the double motors are butted and fixed by bolts with the copper bars inserted into the high-voltage outlet (52) by adopting flat copper bars (6) and the inverters, and the high-voltage junction box cover (51) is detachably connected with the housing body of the high-voltage junction box (5) through bolts.

12. The housing assembly of the hybrid power assembly according to claim 1, wherein a generator harness interface (121) and a driving motor harness interface (122) are provided on the motor rear end cover (12), and a low voltage harness integration interface (123) is provided between the generator harness interface (121) and the driving motor harness interface (122).