CN113612340A

CN113612340A - Motor assembly and vehicle

Info

Publication number: CN113612340A
Application number: CN202110837017.2A
Authority: CN
Inventors: 黑江川; 李义兵
Original assignee: Baoding R&D Branch of Honeycomb Transmission System Jiangsu Co Ltd
Current assignee: Baoding R&D Branch of Honeycomb Transmission System Jiangsu Co Ltd
Priority date: 2021-07-23
Filing date: 2021-07-23
Publication date: 2021-11-05

Abstract

The invention discloses a motor assembly and a vehicle, wherein the motor assembly comprises: the oil separator comprises a shell, a first oil inlet channel and a second oil inlet channel, wherein two ends of the shell are open, an accommodating cavity is formed in the shell, the peripheral wall of the shell is provided with the first oil inlet channel, and an oil distributing hole for communicating the first oil inlet channel with the accommodating cavity is formed in the shell; a first flow channel groove and a second flow channel groove are arranged on the inner wall of the accommodating cavity, the first flow channel groove surrounds the inner wall of the accommodating cavity in a first direction, and the second flow channel groove is intersected with the first flow channel groove and extends in a second direction; the outlet end of the oil distribution hole is arranged in the first flow channel groove or the second flow channel groove. According to the motor component, the cooling oil can flow to the inner wall of the containing cavity along the first flow channel groove and the second flow channel groove, the coverage range of the cooling oil is improved, the inside of the containing cavity is directly cooled and lubricated, the temperature of the motor component is effectively reduced, and the abrasion of the motor component is reduced.

Description

Motor assembly and vehicle

Technical Field

The invention relates to the field of motors, in particular to a motor assembly and a vehicle.

Background

In the related art, most of the existing new energy automobile motors adopt water cooling and oil cooling modes. The water-cooled motor needs to transfer a heat source inside the motor to the outside through layer-by-layer materials and then is taken away by a water channel, and because of the existence of thermal resistance, a temperature gradient exists between a winding and a water-cooled shell, the winding cannot be directly cooled, so that temperature accumulation is caused, local hot spots are formed, and the water-cooling effect is reduced. The oil-cooled motor mainly cools the stator, an oil way is designed inside the shell, and a drainage structure is additionally arranged above the winding, so that the occupied space of the motor is enlarged due to the arrangement, and the structure of the motor is more complex. The oil-cooled motor can also adopt an oil bath mode, cooling oil is added in the motor, so that the rotor is immersed in the cooling oil, the oil is splashed onto the motor through the rotation of the rotor for cooling, the rotation resistance of the rotor can be increased by adopting the method for cooling, and the cooling effect of the cooling mode is limited.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a motor assembly, which can flow cooling oil to an inner wall of a receiving cavity along a first flow channel groove and a second flow channel groove, so as to improve a coverage of the cooling oil, thereby directly cooling and lubricating the inside of the receiving cavity, effectively reducing a temperature of the motor assembly, and reducing wear of the motor assembly.

The invention also provides a motor with the motor assembly.

According to the motor assembly of the present invention, the motor assembly includes: the oil separator comprises a shell, a first oil inlet channel and a second oil inlet channel, wherein two ends of the shell are open, an accommodating cavity is formed in the shell, the peripheral wall of the shell is provided with the first oil inlet channel, and an oil distributing hole for communicating the first oil inlet channel with the accommodating cavity is formed in the shell; a first flow channel groove and a second flow channel groove are arranged on the inner wall of the accommodating cavity, the first flow channel groove surrounds the inner wall of the accommodating cavity in a first direction, and the second flow channel groove is intersected with the first flow channel groove and extends in a second direction; the outlet end of the oil distribution hole is arranged in the first flow channel groove or the second flow channel groove.

According to the motor assembly of the present invention, the inner wall of the receiving cavity of the motor assembly is provided with the first flow channel groove and the second flow channel groove, and the first flow channel groove and the second flow channel groove extend toward the first direction and the second direction, respectively. The cooling oil that divides the oilhole through can flow to the first direction and the second direction that hold the intracavity wall respectively along first flow channel groove and second flow channel groove, guarantees that the cooling oil can be holding the circulation of intracavity wall, has improved the coverage of cooling oil to directly cool down and lubricate holding intracavity portion, reduced motor element's temperature effectively, reduced motor element's wearing and tearing.

According to an embodiment of the present invention, the first flow channel groove and/or the second flow channel groove is configured in a plurality disposed to be spaced apart from each other.

According to an embodiment of the invention, the motor assembly further comprises: a stator disposed in the receiving cavity, an outer circumferential surface of the stator closing an open end of the first flow channel groove and an open end of the second flow channel groove; and the end cover is arranged on the shell and seals one end of the shell.

According to an embodiment of the present invention, an axial fitting piece is disposed on an inner wall of the accommodating cavity, two ends of the second flow channel groove are respectively abutted against the end cover and the axial fitting piece, and an oil guiding channel communicating the second flow channel groove and the accommodating cavity is disposed on the end cover and/or the axial fitting piece.

According to an embodiment of the present invention, the second flow channel grooves are arranged at intervals in a circumferential direction of the housing, and the oil guide passage includes a first oil guide groove; the first oil guide groove is arranged on the end cover, and the first oil guide groove is in one-to-one correspondence with one end of the second flow channel groove so as to communicate the corresponding second flow channel groove with the accommodating cavity.

According to an embodiment of the present invention, the oil guide passage includes a second oil guide groove provided on the axial fitting and configured in a plurality in one-to-one correspondence with the other ends of the plurality of second flow path grooves, the second oil guide groove being adapted to communicate the second flow path grooves with the accommodation chamber.

According to one embodiment of the invention, the axial fitting is configured in the shape of a ring or arc.

According to one embodiment of the invention, a supporting part is arranged on the end cover, a second oil inlet channel communicated with the first oil inlet channel is formed inside the end cover, and the outlet end of the second oil inlet channel is arranged on the supporting part; the motor assembly further includes: the rotor, the rotor rotationally set up in on the supporting part and inside are provided with the cooling chamber, the import of cooling chamber with the export intercommunication of second oil feed passageway, the export of cooling chamber with hold the chamber intercommunication.

According to one embodiment of the present invention, the outer periphery of the rotor is provided with a plurality of first oil guide holes that communicate the cooling chamber with the accommodating chamber; the motor assembly further includes: the balance plates are arranged at two ends of the rotor, each balance plate is provided with a second oil guide hole corresponding to the first oil guide hole and a guide groove which is positioned at the downstream of the second oil guide hole and communicated with the second oil guide hole, and the guide groove is opened towards one end or the other end of the shell in the axial direction.

According to an embodiment of the invention, a bearing is arranged between the end cover and the rotor, the end cover is provided with a third oil guide hole, the third oil guide hole communicates the second oil inlet channel with the accommodating cavity, and an outlet end of the third oil guide hole is opposite to the bearing.

The vehicle according to the present invention is briefly described below.

According to the vehicle provided with the motor assembly of the embodiment, the vehicle provided with the motor assembly of the embodiment has a wider cooling oil flowing range in the motor of the vehicle, and the cooling oil can flow to the first direction and the second direction of the inner wall of the accommodating cavity along the first flow channel groove and the second flow channel groove respectively, so that the inside of the accommodating cavity is directly cooled, cooled and lubricated, the temperature of the motor is effectively reduced, the abrasion of the motor is reduced, and the service performance of the motor is improved.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a cross-sectional view of a motor assembly according to an embodiment of the invention;

FIG. 2 is a top view of a housing according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a housing according to an embodiment of the invention;

FIG. 4 is a cross-sectional view of a housing, stator windings, axial fitting and end cap after mating according to an embodiment of the invention;

FIG. 5 is an enlarged partial view of circle A of FIG. 4;

FIG. 6 is an enlarged partial view of circle B of FIG. 4;

FIG. 7 is a schematic structural view of an axial fitting according to an embodiment of the invention;

FIG. 8 is a schematic structural view of an end cap according to an embodiment of the invention;

FIG. 9 is a bottom view of an end cap according to an embodiment of the present invention;

FIG. 10 is a cross-sectional view of section A-A of FIG. 9;

FIG. 11 is an enlarged partial view of circle C of FIG. 10;

FIG. 12 is a cross-sectional view of section B-B of FIG. 9;

FIG. 13 is a cross-sectional view of a rotor cooling oil circuit according to an embodiment of the present invention;

FIG. 14 is a schematic structural view of a rotor according to an embodiment of the present invention;

FIG. 15 is a cross-sectional view of a rotor according to an embodiment of the present invention;

FIG. 16 is a schematic structural diagram of a balance plate according to an embodiment of the present invention

FIG. 17 is a cross-sectional view of section C-C of FIG. 16;

FIG. 18 is an enlarged fragmentary view of circle D of FIG. 17;

FIG. 19 is a cross-sectional view of a bearing lubrication and cooling oil circuit according to an embodiment of the present invention;

FIG. 20 is an enlarged fragmentary view of circle E of FIG. 19;

reference numerals:

the motor assembly 1, the housing 11, the accommodating chamber 111, the first oil inlet passage 112,

an oil distribution hole 113, a first flow passage groove 114, a second flow passage groove 115, an axial fitting 116,

second oil guide groove 1161, stator 12, stator winding 121, end cap 13,

a first oil guide groove 131, a support portion 132, a second oil inlet passage 133, a third oil guide hole 134,

the rotor 14, the cooling chamber 141, the first oil guide hole 142, the rotor core 143,

a balance plate 15, a second oil guide hole 151, a guide groove 152,

bearing 16, sealing rubber ring 161, sealing rubber ring mounting groove 162, oil outlet groove 17.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

Referring to fig. 1 to 20, a motor assembly 1 according to an embodiment of the present invention will be described, where the motor assembly 1 includes a housing 11, a receiving cavity 111 is provided inside the housing 11, a first oil inlet channel 112 is provided on a circumferential wall of the housing 11, an oil distribution hole 113 communicating the first oil inlet channel 112 with the receiving cavity 111 is formed on the housing 11, a first flow channel groove 114 and a second flow channel groove 115 are provided on an inner wall of the receiving cavity 111, the first flow channel groove 114 surrounds the inner wall of the receiving cavity 111 in a first direction, the second flow channel groove 115 intersects with the first flow channel groove 114 and extends in a second direction, and an outlet end of the oil distribution hole 113 is provided in the first flow channel groove 114 or the second flow channel groove 115.

Specifically, both ends of the housing 11 are respectively opened toward the outside, and the inside of the housing 11 is provided with a receiving cavity 111, and the receiving cavity 111 may be used to receive other parts of the motor, such as the rotor 14, the stator 12, and the like. A first oil inlet channel 112 is arranged on the peripheral wall of the housing 11, and the first oil inlet channel 112 can be used for guiding cooling oil from other systems to the inside of the motor assembly 1 and providing cooling oil for the internal structure of the motor assembly 1, so that the motor assembly 1 is cooled. The casing 11 is formed with the oil distribution hole 113 that communicates the first oil inlet passage 112 and hold the chamber 111, and the oil distribution hole 113 can directly hold the interior of chamber 111 with the cooling oil direction in the first oil inlet passage 112, cools down the inside of motor element 1.

The inner wall of the receiving cavity 111 is further provided with a first channel groove 114 and a second channel groove 115, the first channel groove 114 surrounds the inner wall of the receiving cavity 111 in a first direction, the second channel groove 115 intersects with the first channel groove 114 and extends in a second direction, wherein the first direction may be a circumferential direction of the housing 11, the second direction may be an axial direction of the housing 11, and an outlet end of the oil distribution hole 113 is disposed in the first channel groove 114 or the second channel groove 115. Therefore, the first flow channel groove 114 can guide the cooling oil flowing out of the oil distribution hole 113 further to the circumferential direction of the casing 11, and the second flow channel groove 115 can guide the cooling oil flowing out of the oil distribution hole 113 to both ends of the casing 11, thereby improving the cooling effect of the cooling oil.

In brief, according to the motor assembly 1 of the present invention, the inner wall of the receiving cavity 111 of the motor assembly 1 is provided with the first flow channel groove 114 and the second flow channel groove 115, and the first flow channel groove 114 and the second flow channel groove 115 extend toward the first direction and the second direction, respectively. The cooling oil that divides oilhole 113 to flow through can flow to the first direction and the second direction that hold chamber 111 inner wall respectively along first flow channel groove 114 and second flow channel groove 115, guarantees that the cooling oil can be in holding the circulation of chamber 111 inner wall, has improved the coverage of cooling oil to directly cool off and lubricate holding the inside of chamber 111, reduced motor element 1's temperature effectively, reduced motor element 1's wearing and tearing.

According to an embodiment of the present invention, the first flow channel groove 114 or the second flow channel groove 115 is configured in a plurality spaced apart from each other, increasing the flow rate of the cooling oil, so that the cooling oil can rapidly cool down the inside of the receiving chamber 111. The first flow channel groove 114 and the second flow channel groove 115 may also be configured in a plurality of numbers spaced apart from each other, the first flow channel groove 114 may be arranged at intervals in the circumferential direction of the inner wall of the accommodating chamber 111, the second flow channel groove 115 may be arranged at intervals in the axial direction of the inner wall of the accommodating chamber 111, and the plurality of first flow channel grooves 114 and the plurality of second flow channel grooves 115 are arranged in an intersecting manner, which ensures that the cooling oil can be gradually spread out along the plurality of oil paths on the inner wall of the accommodating chamber 111, and further improves the cooling range and the cooling effect of the cooling oil.

According to one embodiment of the invention, the electrical machine assembly 1 further comprises a stator 12 and an end cap 13. The stator 12 is arranged in the accommodating cavity 111, the stator 12 is wound with a stator winding 121, the outer circumferential surface of the stator 12 is attached to the open end of the first flow channel groove 114 and the open end surface of the second flow channel groove 115, so that the open ends of the first flow channel groove 114 and the second flow channel groove 115 are sealed to form a channel suitable for cooling and flowing, meanwhile, cooling oil in the first flow channel groove 114 and the second flow channel groove 115 is prevented from flowing into parts in the accommodating cavity 111 and generating negative pressure on the parts, and the parts can be ensured to continue to work normally without being influenced by the cooling oil.

Specifically, the stator 12 and the accommodating cavity 111 are attached after being in interference fit, and the outer peripheral surface of the stator 12 abuts against the inner peripheral surface of the accommodating cavity 111 to seal the first flow channel groove 114 and the second flow channel groove 115, so that the cooling oil can flow in the first flow channel groove 114 and the second flow channel groove 115 to reduce the temperature of the motor assembly 1.

The end cover 13 is provided on the housing 11, and the end cover 13 closes one end of the housing 11 to prevent the cooling oil from flowing out from the other side of the receiving chamber 111 to cause a problem of leakage of the cooling oil.

According to an embodiment of the present invention, an axial fitting 116 is provided on an inner wall of the receiving cavity 111, one end of the second flow channel groove 115 abuts against the end cover 13, and the other end of the second flow channel groove 115 abuts against the axial fitting 116, so as to be adapted to guide the cooling oil in the second flow channel groove 115 toward the end cover 13 and the axial fitting 116. And axial fitting piece 116 can be processed alone and install in holding chamber 111, and directly process the fluting in the inner wall that holds chamber 111 among the prior art and need stretch into holding chamber 111 with the cutter, but hold chamber 111 inner space narrow and small, the inconvenient entering of cutter to lead to the difficult scheduling problem of fluting. The axial fitting piece 116 may be attached to the inner wall of the accommodating cavity 111, and one side of the axial fitting piece 116 is abutted to the stator 12 to perform a limiting function, so as to prevent the stator 12 from moving in the axial direction.

The end cover 13 is provided with an oil guide channel, the oil guide channel can communicate the second flow channel groove 115 with the inside of the housing 11, and the cooling oil flows through the oil guide channel from the second flow channel groove 115 and enters the accommodating cavity 111 in the housing 11, so as to realize the effect of cooling the stator 12 and the stator winding 121. The axial fitting 116 may also be provided with an oil guiding channel, the oil guiding channel may communicate the second flow channel 115 with the accommodating cavity 111, and the cooling oil flows through the oil guiding channel from the second flow channel 115 and enters the stator 12, so as to cool the stator 12 and the stator winding 121

According to an embodiment of the present invention, the second flow channel grooves 115 are arranged at intervals in the circumferential direction of the housing 11, the second flow channel grooves 115 may be configured in plurality, the oil guide passage includes a first oil guide groove 131, the first oil guide groove 131 is provided on the head cover 13, the first oil guide groove 131 may be configured in plurality, and the first oil guide groove 131 may be configured as a straight hole or an inclined hole. One end of the first oil guide grooves 131 is in one-to-one correspondence with the second oil guide grooves 115 and is communicated with the second oil guide grooves 131, the other end of the first oil guide grooves 131 is communicated with the accommodating cavity 111, cooling oil can flow through the first oil guide grooves 131 from the second oil guide grooves 115 and enters the accommodating cavity 111, and the oil-sprayed area of the first oil guide grooves 131 corresponds to the middle area of one end of the stator winding 121 in the axial direction.

According to an embodiment of the present invention, the oil guide passage includes a second oil guide groove 1161, the second oil guide groove 1161 is disposed on the axial fitting member 116, and the second oil guide groove 1161 may be configured in a plurality of numbers, the plurality of second oil guide grooves 1161 extend toward a central position of the accommodation chamber 111, and since an end of the axial fitting member 116 where the second oil guide groove 1161 is disposed is in direct contact with the stator 12, it is ensured that the cooling oil can flow in a direction of the second oil guide groove 1161. One end of the second oil guide grooves 1161 is in one-to-one correspondence with the second flow channel grooves 115 and is communicated with the second oil guide grooves 1161, and the other end of the second oil guide grooves 1161 is communicated with the accommodating cavity 111, so that the second oil guide grooves 1161 are suitable for communicating the second flow channel grooves 115 with the accommodating cavity 111, cooling oil can flow through the second oil guide grooves 1161 from the second flow channel grooves 115 and enter the stator 12 inside the accommodating cavity 111, and the effect of cooling the stator 12 and the stator winding 121 is achieved.

The circumferential relative position of the second oil guide groove 1161 corresponds to the second flow channel grooves 115 of the inner wall of the accommodating cavity 111 one by one, and the number of the second oil guide grooves 1161 is the same, so as to ensure that the second oil guide grooves 1161 are communicated with the second flow channel grooves 115 of the inner wall of the accommodating cavity 111, and the area of the second oil guide groove 1161 after oil injection corresponds to the middle area of one end of the stator winding 121 in the axial position.

According to an embodiment of the present invention, the axial fitting piece 116 is configured in a ring shape or an arc shape, the oil outlet groove 17 is disposed in the accommodating cavity 111, and the cooling oil covered in the accommodating cavity 111 flows downward under the influence of gravity after absorbing heat until it is collected in the oil outlet groove 17 and flows out of the motor assembly 1 along the oil outlet groove 17. in an embodiment of the present invention, the axial fitting piece 116 may be configured in an arc shape, the fitting piece 116 may be more conveniently installed into the casing 11 by configuring the axial fitting piece 116 in an arc shape, and the gap of the arc-shaped axial fitting piece 116 may be used to avoid the oil outlet groove 17 so that the cooling oil flows into the oil outlet groove 17, thereby increasing the discharge rate of the cooling oil.

According to an embodiment of the present invention, a support portion 132 is provided on the end cover 13, the support portion 132 may be provided at the right center of the end cover 13, a second oil inlet passage 133 is formed inside the end cover 13, the second oil inlet passage 133 is communicated with the first oil inlet passage 112 to be adapted to guide the cooling oil in the first oil inlet passage 112 to the second oil inlet passage 133, and an inlet end of the second oil inlet passage 133 is connected to the first oil inlet passage 112, and an outlet end of the second oil inlet passage 133 is connected to an opening on the support portion 132.

The motor assembly 1 further includes a rotor 14, the rotor 14 being rotatably disposed on the support portion 132, and a rotor core 143 being disposed on an outer circumference of the rotor 14. The rotor 14 is provided with a cooling chamber 141 inside, the cooling chamber 141 extends in the axial direction of the rotor 14, wherein an inlet end of the cooling chamber 141 is communicated with an outlet of the second oil inlet passage 133, an outlet of the cooling chamber 141 is communicated with the accommodating chamber 111, and cooling oil flows through the inlet end from the second oil inlet passage 133 into the cooling chamber 141, thereby lubricating and cooling the rotor 14.

According to an embodiment of the present invention, the outer circumference of the rotor 14 is provided with a plurality of first oil guide holes 142, the first oil guide holes 142 are arranged at intervals at the outer circumference of the rotor 14, and one end of the first oil guide holes 142 communicates with the cooling chamber 141, and the other end of the first oil guide holes 142 communicates with the accommodating chamber 111, and the cooling oil in the cooling chamber 141 can flow to the accommodating chamber 111 through the first oil guide holes 142, wherein the first oil guide holes 142 can be configured as a front end oil hole and a rear end oil hole, which are machined in the radial direction of the rotor 14, and the number of the front end oil holes and the rear end oil holes is equal. The front end oil hole may be on the side of the shoulder near the rotor 14, and the diameter of the rear end oil hole is greater than the diameter of the front end oil hole.

The motor assembly 1 further includes balance plates 15, the balance plates 15 are disposed at two ends of the rotor 14, the balance plate 15 at each end is disposed around the outer circumferential wall of the rotor 14, and each balance plate 15 is provided with a second oil guide hole 151 and a guide groove 152.

The second oil guide hole 151 may be configured in a plurality of numbers, the plurality of second oil guide holes 151 correspond to the plurality of first oil guide holes 142 one to one, the cooling oil in the cooling chamber 141 may flow from the first oil guide holes 142 to the second oil guide holes 151, the guide groove 152 is disposed downstream of the second oil guide holes 151 and connected to the second oil guide holes 151, the guide groove 152 may also be configured in a plurality and disposed in one to one correspondence with the plurality of second oil guide holes 151, the other side of the guide groove 152 is opened toward one end or the other end in the axial direction of the housing 11, and there is a certain angle between the guide groove 152 and the second oil guide holes 151, thereby discharging the cooling oil in the second oil guide holes 151 into the receiving chamber 111.

According to an embodiment of the present invention, a bearing 16 is disposed between the end cover 13 and the rotor 14, a third oil guide hole 134 is disposed in the end cover 13, the third oil guide hole 134 communicates the second oil inlet channel 133 with the accommodating cavity 111, specifically, an inlet end of the third oil guide hole 134 communicates with the second oil inlet channel 133, an outlet end of the third oil guide hole 134 faces the bearing 16, and cooling oil can flow through the third oil guide hole 134 from the second oil inlet channel 133 and be sprayed to the bearing 16, so as to lubricate and cool the bearing 16.

The bearing 16 is processed with a sealing rubber ring mounting groove 162, a sealing rubber ring 161 is mounted in the sealing rubber ring mounting groove 162 and is in interference fit with the excircle of the bearing 16, the excircle of the rotating shaft is in interference fit with the excircle of the bearing 16, and the parts are matched to form a cavity which belongs to a part of a bearing 16 mounting hole of the bearing 16 of the end cover 13;

according to one embodiment of the present invention, the main flow paths of the cooling oil in the cooling oil path of the stator 12 are: the cooling oil passes through the first oil inlet passage 112 and the oil distribution hole 113, and the first flow channel groove 114 and the second flow channel groove 115, flows through the outer circumferential surfaces of the stator 12 and the first flow channel groove 114, and the second flow channel groove 115, and then reaches the axial fitting 116 and the end cover 13 at both ends of the stator 12, and is sprayed onto the stator winding 121 at both ends of the stator 12 through the second oil guide groove 1161 of the axial fitting 116 and the first oil guide groove 131 of the end cover 13, and the cooling oil enters the oil outlet groove 17 at the bottom of the housing 11 due to the action of gravity, and then is led out to the outside of the motor assembly 1.

The flow locus of the cooling oil path of the stator 12 is as follows: the cooling oil flows from the housing 11 through the first oil inlet passage 112, the oil distribution hole 113, the first flow path groove 114, the second flow path groove 115, and finally to the stator 12.

The flow trajectory of the cooling oil path of the stator winding 121 is: the cooling oil flows from the housing 11 through the first oil inlet passage 112, the oil distribution hole 113, the first flow path groove 114, the second flow path groove 115, the axial fitting 116, the second oil guide groove 1161, and finally to the stator winding 121 at one end of the stator 12.

Another flow path of the cooling oil path of the stator winding 121 is: the cooling oil flows from the housing 11 through the first oil inlet passage 112, the oil distribution hole 113, the first flow channel groove 114, the second flow channel groove 115, the first oil guide groove 131, and finally to the stator winding 121 at one end of the stator 12

According to one embodiment of the present invention, the flow trajectories of the cooling oil paths of the rotor 14 are: the cooling oil flows from the housing 11 through the first oil inlet passage 112, the end cover 13, the second oil inlet passage 133, the support portion 132, the cooling chamber 141, the first oil guide hole 142, the second oil guide hole 151 of the balance plate 15, the guide groove 152, and finally to the stator winding 121 of the stator 12.

The flow trajectory of the cooling oil path of the stator winding 121 is: the flow locus of the cooling oil path of the rotor 14 is as follows: the cooling oil flows from the housing 11 through the first oil inlet passage 112, the end cover 13, the second oil inlet passage 133, the support portion 132, the cooling chamber 141, the first oil guide hole 142, the second oil guide hole 151 of the balance plate 15, the guide groove 152, and finally to the stator winding 121. The cooling oil enters the oil outlet groove 17 at the bottom of the housing 11 due to the action of gravity and is then led out to the outside of the motor assembly 1.

According to one embodiment of the present invention, the main flow paths of the cooling oil in the lubrication and cooling oil paths of the bearing 16 are: the cooling oil is sprayed to the annular area of the bearing 16 where the balls of the bearing 16 are located through the second oil inlet channel 133 and the third oil guide hole 134, so that the bearing 16 can be directly lubricated and cooled, and a part of the cooling oil enters the cavity under the action of gravity after being blocked by the bearing 16, and as the cooling oil in the cavity is accumulated, the cooling oil can exceed the inner ring of the bearing 16, and the part of the cooling oil flows between the inner ring and the outer ring of the bearing 16 to reach the inside of the motor.

The flow trajectories of the lubricating and cooling oil paths of the bearing 16 are: the cooling oil flows from the housing 11 through the first oil inlet passage 112, the end cover 13, the second oil inlet passage 133, the third oil guide hole 134, and finally to the bearing 16.

Another flow path for the bearing 16 lubrication and cooling oil paths is: the cooling oil flows from the housing 11 through the first oil inlet passage 112, the end cover 13, the second oil inlet passage 133, the third oil guide hole 134, the cavity, and finally to the bearing 16. The cooling oil enters the oil outlet groove 17 at the bottom of the housing 11 due to the action of gravity and is then led out to the outside of the motor assembly 1.

The vehicle according to the present invention is briefly described below.

According to the vehicle provided with the motor assembly 1 of the embodiment, because the vehicle provided with the motor assembly 1 of the embodiment of the invention has a wider cooling oil flowing range in the motor of the vehicle, the cooling oil can flow to the first direction and the second direction of the inner wall of the accommodating cavity 111 along the first flow channel groove 114 and the second flow channel groove 115 respectively, so that the inside of the accommodating cavity 111 is directly cooled and lubricated, the temperature of the motor is effectively reduced, the abrasion of the motor is reduced, and the service performance of the motor is improved.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.

In the description of the present invention, "a plurality" means two or more.

In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.

In the description of the invention, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An electric machine assembly, comprising:

the oil separator comprises a shell (11), wherein two ends of the shell (11) are open, a containing cavity (111) is arranged in the shell (11), a first oil inlet channel (112) is arranged on the peripheral wall of the shell (11), and an oil distribution hole (113) for communicating the first oil inlet channel (112) with the containing cavity (111) is formed in the shell (11);

a first flow channel groove (114) and a second flow channel groove (115) are arranged on the inner wall of the accommodating cavity (111), the first flow channel groove (114) surrounds the inner wall of the accommodating cavity (111) in a first direction, and the second flow channel groove (115) intersects with the first flow channel groove (114) and extends in a second direction;

an outlet end of the oil distribution hole (113) is disposed in the first flow channel groove (114) or the second flow channel groove (115).

2. The electric machine assembly according to claim 1, characterized in that the first flow channel groove (114) and/or the second flow channel groove (115) are configured in a plurality arranged spaced apart from each other.

3. The electric machine assembly of claim 2, further comprising:

a stator (12), the stator (12) being disposed in the accommodation chamber (111), an outer circumferential surface of the stator (12) closing an open end of the first flow channel groove (114) and an open end of the second flow channel groove (115);

an end cap (13), the end cap (13) being disposed on the housing (11) and closing one end of the housing (11).

4. The electric machine assembly according to claim 3, characterized in that an axial fitting piece (116) is arranged on the inner wall of the accommodating cavity (111), two ends of the second flow channel groove (115) are respectively abutted against the end cover (13) and the axial fitting piece (116), and an oil guide channel communicating the second flow channel groove (115) with the accommodating cavity (111) is arranged on the end cover (13) and/or the axial fitting piece (116).

5. The motor assembly according to claim 4, wherein the second flow channel grooves (115) are arranged at intervals in a circumferential direction of the housing (11), and the oil guide passage includes a first oil guide groove (131);

wherein the first oil guide groove (131) is provided on the end cap (13), and the first oil guide groove (131) is configured in a plurality in one-to-one correspondence with one end of the second flow channel groove (115) to communicate the corresponding second flow channel groove (115) with the receiving chamber (111).

6. The electric machine assembly according to claim 5, characterized in that the oil guide passage comprises a second oil guide groove (1161), the second oil guide groove (1161) being provided on the axial fitting (116) and configured in a plurality in one-to-one correspondence with the other ends of the plurality of second flow path grooves (115), the second oil guide groove (1161) being adapted to communicate the second flow path grooves (115) with the accommodation chamber (111).

7. An electric machine assembly according to claim 6, characterized in that the axial fitting (116) is configured as a ring or as an arc.

8. A motor assembly according to claim 3, wherein a support portion (132) is provided on the end cover (13), a second oil inlet passage (133) communicating with the first oil inlet passage (112) is formed inside the end cover (13), and an outlet end of the second oil inlet passage (133) is provided on the support portion (132);

the motor assembly further includes:

the rotor (14), rotor (14) rotationally set up on supporting part (132) and inside is provided with cooling chamber (141), the import of cooling chamber (141) with the export intercommunication of second oil feed passageway (133), the export of cooling chamber (141) with hold chamber (111) intercommunication.

9. The motor assembly according to claim 8, wherein the rotor (14) is provided at an outer circumference thereof with a plurality of first oil guide holes (142), the first oil guide holes (142) communicating the cooling chamber (141) with the receiving cavity (111);

the motor assembly further includes: the balance plates (15) are arranged at two ends of the rotor (14), each balance plate (15) is provided with a second oil guide hole (151) corresponding to the first oil guide hole (142) and a guide groove (152) located at the downstream of the second oil guide hole (151) and communicated with the second oil guide hole (151), and the guide groove (152) is opened towards one end or the other end of the shell (11) in the axial direction.

10. The motor assembly according to claim 9, wherein a bearing (16) is disposed between the end cover (13) and the rotor (14), the end cover (13) is provided with a third oil guide hole (134), the third oil guide hole (134) communicates the second oil inlet passage (133) with the accommodating chamber (111), and an outlet end of the third oil guide hole (134) is opposite to the bearing (16).

11. A vehicle comprising an electric machine assembly according to any one of claims 1-10.