CN115833481B

CN115833481B - Double-cooling motor

Info

Publication number: CN115833481B
Application number: CN202310078258.2A
Authority: CN
Inventors: 邱彩菊
Original assignee: Shenzhen Hongming Electromechanical Co ltd
Current assignee: Shenzhen Hongming Electromechanical Co ltd
Priority date: 2023-02-08
Filing date: 2023-02-08
Publication date: 2023-05-12
Anticipated expiration: 2043-02-08
Also published as: CN115833481A

Abstract

The application provides a double cooling motor, double cooling motor includes: a housing; the rotor assembly comprises a rotating shaft, and cooling oil is circularly arranged in the rotating shaft; the air cooling device comprises a planetary gear mechanism, a fan assembly and an air cooling housing, wherein the planetary gear mechanism comprises a sun gear arranged on a rotating shaft, an outer gear ring sleeved outside the rotating shaft, a planet wheel meshed between the sun gear and the outer gear ring and a fan shaft rotatably arranged on the planet wheel, the fan shaft and the rotating shaft are driven by a group of reduction gear assemblies, the fan assembly is arranged on the fan shaft, the air cooling housing is connected with a machine shell and is arranged outside the planetary gear mechanism and the fan assembly, the inner side of the air cooling housing and the outer side of the machine shell are arranged at intervals, and one side of the air cooling housing far away from the machine shell is provided with a plurality of perforations. The application provides a double cooling motor not only can still ensure the cooling effect preferred to the motor when the rotational speed of pivot is lower, can also ensure the NVH performance preferred of motor when the rotational speed of pivot is higher.

Description

Double-cooling motor

Technical Field

The application relates to the technical field of motors, in particular to a double-cooling motor.

Background

The power limit capacity of the motor is often limited by the temperature rise limit of the motor, so that the power density of the motor can be improved immediately by improving the cooling and heat dissipation capacity of the motor. Depending on the type of cooling medium, the cooling modes of the motor may include air cooling, water cooling and oil cooling, i.e. the motor adopts air, cooling water and cooling oil as cooling medium, respectively. Meanwhile, according to the flow path of the cooling medium in the motor, the cooling mode of the motor can comprise shell air cooling, shell water cooling, rotating shaft oil cooling, end cover oil spraying and the like.

In order to further improve the cooling and heat dissipation capabilities of the motor, there are two cooling modes of the motor in the prior art, such as a cooling mode of a shell air cooling and a rotating shaft oil cooling, so as to form a double cooling motor.

However, in the prior art, the cooling mode of air cooling of the casing and oil cooling of the rotating shaft is mostly used for a motor with lower rotating speed, when the rotating speed of the motor is higher, the fan assembly sleeved on the rotating shaft and used for driving air to circulate is higher in the same rotating speed as the synchronous rotation of the motor, so that tsunami is easy to generate, stronger mechanical vibration is caused, and the NVH performance of the motor is influenced.

Disclosure of Invention

In order to solve the problem that the NVH performance of a motor adopting a double-cooling mode of shell air cooling and rotating shaft oil cooling is poor when the motor is suitable for high rotating speed, the application provides a double-cooling motor.

The application provides a double-cooling motor, double-cooling motor includes:

a housing arranged in the middle;

the rotor assembly comprises a rotating shaft, the rotating shaft is rotatably arranged in the shell, one end of the rotating shaft extends out of the shell, and cooling oil is circularly arranged in the rotating shaft so as to cool the rotating shaft through the cooling oil; and

the air cooling device comprises a planetary gear mechanism, a fan assembly and an air cooling housing, wherein the planetary gear mechanism and the fan assembly are arranged outside a machine shell, the planetary gear mechanism comprises a sun gear arranged on a rotating shaft, an outer gear ring sleeved outside the rotating shaft, a planet wheel meshed between the sun gear and the outer gear ring and a fan shaft rotatably arranged on the planet wheel, the fan shaft and the rotating shaft are driven by a group of reduction gear assemblies, the fan assembly is arranged on the fan shaft, the air cooling housing is connected with the machine shell and is arranged outside the planetary gear mechanism, the inner side of the air cooling housing and the outer side of the machine shell are arranged at intervals, and one side of the air cooling housing far away from the machine shell is provided with a plurality of perforations.

Optionally, the reduction gear assembly includes a first gear disposed on the rotating shaft and a second gear disposed on the fan shaft, the first gear being meshed with the second gear, and an outer diameter of the first gear being smaller than an outer diameter of the second gear.

Optionally, the fan assembly with the speed reduction gear assembly is in along keeping away from the direction of casing sets gradually in the forced air cooling housing, the second gear includes speed reduction wheel inner circle, speed reduction wheel outer lane and speed reduction wheel skeleton, the speed reduction wheel inner circle sets up on the fan axle, the speed reduction wheel outer lane cover is established outside the fan axle, the speed reduction wheel skeleton sets up the speed reduction wheel inner circle with between the speed reduction wheel outer lane.

Optionally, the outer diameter of the sun gear is smaller than the outer diameter of the planet gear.

Optionally, the fan assembly with planetary gear mechanism sets gradually along keeping away from the direction of casing is in the forced air cooling housing, the planet wheel includes planet wheel inner circle, planet wheel outer lane and planet wheel skeleton, the planet wheel inner circle sets up on the fan axle, the planet wheel outer lane is suited to be established outside the fan axle, the planet wheel skeleton sets up the planet wheel inner circle with between the planet wheel outer lane.

Optionally, the lateral wall of casing is last to be provided with the radiating fin, the radiating fin is provided with a plurality of along the circumference of casing, adjacent two form a heat dissipation passageway between the radiating fin, the inboard butt of forced air cooling housing is on a plurality of radiating fin.

Optionally, the pivot is provided with the main oil duct along the axial, along radially being provided with the branch oil duct that the main oil duct is linked together, the rotor subassembly still includes the rotor core, the rotor core sets up in the pivot to be provided with the oil passage along the axial, the oil passage with divide the oil duct one-to-one and the intercommunication, the rotor core still is provided with gets rid of the oilhole, get rid of the oilhole intercommunication the oil passage with the inner chamber of casing, the one end of casing sets up the oil pump, and is provided with the intercommunication the oil pump with the pump oil passageway of the inner chamber of casing, pivot one end with the oil pump transmission, and the main oil duct with the oil pump intercommunication.

Optionally, the double-cooling motor further comprises a stator assembly, wherein the stator assembly is arranged in the casing and sleeved outside the rotor assembly, and the oil throwing hole faces to the end part of the stator assembly.

Optionally, one side of the top of the casing is further provided with a spraying oil duct, the spraying oil duct is communicated with the inner cavity of the casing through a spraying hole, the spraying hole is at least arranged right above the end part of the stator assembly, and the casing is further provided with a communicating oil duct which is communicated with the spraying oil duct and the oil pump.

Optionally, the planetary gear mechanism further comprises a planet carrier, the planet wheels are arranged at equal intervals along the circumferential direction of the outer gear ring, the planet carrier is connected with the planet wheels, an annular groove is formed in the air cooling housing, a sliding block is arranged on the planet carrier, and the sliding block is slidingly arranged in the annular groove.

This application is through setting up reduction gear assembly between pivot and fan axle, and when the rotational speed of pivot was higher, reduction gear assembly then can make the power of pivot can reduce when transmitting to the fan axle to reduce the rotational speed of fan axle, and then avoid the fan assembly to produce the spike when driving the circulation of air, and can avoid the fan assembly to produce stronger mechanical vibration, in order to reach the purpose that improves the NVH performance of motor. Meanwhile, this application is still through setting up planetary gear mechanism for fan assembly is along radial outside more near the casing, and fan assembly is still along the circumference rotation of pivot, and when the rotational speed of pivot was lower, this application still can keep splendid forced air cooling effect.

Drawings

Fig. 1 is a schematic structural diagram of a dual-cooling motor according to an embodiment of the present application.

Fig. 2 is a cross-sectional view of a dual cooling motor provided in an embodiment of the present application.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is an enlarged view of a portion B in fig. 2.

Reference numerals illustrate: 100. a housing; 110. a housing; 111. a spray oil duct; 112. spraying holes; 120. an end cap; 121. an oil pumping channel; 122. a communication oil duct; 130. a heat radiation fin; 140. a heat dissipation channel; 200. a rotor assembly; 210. a rotating shaft; 211. a main oil duct; 212. oil distribution channels; 220. a rotor core; 221. an oil passage; 222. an oil throwing hole; 223. a radial oil passage; 300. a planetary gear mechanism; 310. a sun gear; 320. an outer ring gear; 330. a planet wheel; 331. a planet wheel inner ring; 332. an outer ring of the planet wheel; 333. a planet wheel skeleton; 340. a fan shaft; 350. a planet carrier; 360. a slide block; 400. a fan assembly; 500. an air-cooled housing; 510. perforating; 520. a ring groove; 600. a reduction gear assembly; 610. a first gear; 620. a second gear; 621. a reduction gear inner ring; 622. a reduction gear outer ring; 623. a reduction gear skeleton; 700. an oil pump; 800. a stator assembly.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-4.

The embodiment of the application provides a double cooling motor, double cooling motor includes:

a casing 100, which is disposed in the middle;

the rotor assembly 200, it includes the spindle 210, the spindle 210 rotates and sets up in the chassis 100, and one end stretches out of the chassis 100, the spindle 210 circulates and sets up the cooling oil, in order to cool the said spindle 210 through the cooling oil; and

the air cooling device comprises a planetary gear mechanism 300, a fan assembly 400 and an air cooling housing 500, wherein the planetary gear mechanism 300 and the fan assembly 400 are arranged outside the casing 100, the planetary gear mechanism 300 comprises a sun gear 310 arranged on a rotating shaft 210, an outer gear ring 320 sleeved outside the rotating shaft 210, a planet gear 330 meshed between the sun gear 310 and the outer gear ring 320 and a fan shaft 340 rotatably arranged on the planet gear 330, the fan shaft 340 and the rotating shaft 210 are driven by a group of reduction gear assemblies 600, the fan assembly 400 is arranged on the fan shaft 340, the air cooling housing 500 is connected with the casing 100 and is arranged outside the planetary gear mechanism 300 and the fan assembly 400, the inner side of the air cooling housing 500 and the outer side of the casing 100 are arranged at intervals, and a plurality of perforations 510 are formed in one side of the air cooling housing 500 away from the casing 100.

As shown in fig. 1 and 2, in the present embodiment, it is exemplarily illustrated that the casing 100 is provided hollow, and may include a housing 110 and an end cover 120. The housing 110 may be open at one end and closed at the other end, and the end cap 120 may be disposed at the open end of the housing 110 to close the housing 110, thereby forming the casing 100.

In some embodiments, the housing 110 may also be open at both ends, and the end caps 120 are provided in two, and the two end caps 120 are provided at both ends of the housing 110, respectively.

As shown in fig. 1 and 2, in the present embodiment, the rotor assembly 200 is rotatably provided within the housing 110 and includes a rotation shaft 210. One end of the rotation shaft 210 may pass through the closed end of the housing 110 to protrude outside the casing 100. The end portion may also be used as an output end of the motor, and may be provided with splines or the like for transmission on its outer side wall. The inside of the rotating shaft 210 may be provided with an oil passage structure for circulating cooling oil to be circularly provided with the cooling oil, thereby realizing an oil-cooled cooling manner by the cooling oil.

As shown in fig. 1 and 2, as for the air cooling device, it can drive air to circulate outside the casing 100, so as to realize a cooling mode of air cooling by air. In more detail, the air cooling device may be disposed at a closed end of the case 110. The sun gear 310 may be coaxially sleeved on the rotating shaft 210 and synchronously rotate along with the rotating shaft 210. And the outer gear ring 320 may be coaxially sleeved outside the rotating shaft 210 and the sun gear 310. The planet 330 may then be meshed between the sun 310 and the planet 330 simultaneously. When the rotating shaft 210 rotates, it can drive the sun gear 310 to rotate synchronously, and the sun gear 310 can drive the planet gears 330 to rotate around the axis thereof, and at the same time, the planet gears 330 can also revolve around the axis of the rotating shaft 210 on the outer gear 320.

As shown in fig. 2 and 3, the fan shaft 340 is rotatably disposed on the planet 330, and the fan assembly 400 is disposed on the fan shaft 340 to rotate synchronously with the fan shaft 340, thereby driving air circulation. The fan shaft 340 is driven by the rotation shaft 210, and a set of reduction gear assemblies 600 are provided between the fan shaft 340 and the rotation shaft 210. When the rotating shaft 210 rotates, it may further drive the fan shaft 340 to rotate synchronously through the reduction gear assembly 600, and the fan shaft 340 may drive the fan assembly 400 to rotate synchronously. By the deceleration of the reduction gear assembly 600, the power of the rotation shaft 210 is reduced when being transmitted to the fan shaft 340, i.e., the rotation speed of the fan shaft 340 is less than the rotation speed of the rotation shaft 210.

As shown in fig. 2 and 3, the air-cooled housing 500 may be open at one end and closed at the other end, and the open end of the air-cooled housing 500 may be sleeved outside the closed end of the casing 110, and the inner side of the air-cooled housing 500 is spaced from the outer side of the casing 110. The closed end of the air-cooled casing 500 may be provided with a plurality of perforations 510, and the plurality of perforations 510 may be uniformly distributed over the air-cooled casing 500, such as a rectangular array of the plurality of perforations 510. The output end of the shaft 210 passes through the closed end of the air-cooled enclosure 500, and the planetary gear mechanism 300 and the fan assembly 400 are both disposed within the air-cooled enclosure 500. In this embodiment, the direction in which the fan assembly 400 drives the air flow may be the direction in which the closed end of the air-cooled casing 500 faces the open end.

In this embodiment, when the rotating shaft 210 rotates, it drives the fan shaft 340 through the reduction gear assembly 600, and when the fan shaft 340 rotates, it drives the fan assembly 400 to rotate synchronously, and when the fan assembly 400 rotates, air is driven to circulate, and the air enters from the through holes 510 of the air-cooled housing 500 and is discharged from the gap between the air-cooled housing 500 and the casing 110, so as to perform air cooling on the casing 100 of the motor in the circulation process; and the rotating shaft 210 further drives the sun gear 310 to rotate, when the sun gear 310 rotates, the planet gears 330 are driven to rotate around the axis of the sun gear, meanwhile, the planet gears 330 also revolve around the axis of the rotating shaft 210, and when the planet gears 330 revolve, the fan shaft 340 and the fan assembly 400 are driven to synchronously rotate around the axis of the rotating shaft 210, so that the fan assembly 400 performs air cooling on the casing 100 at different positions in the circumferential direction of the casing 100. At the same time, the cooling oil circulates inside the rotating shaft 210 to oil-cool the rotating shaft 210.

It will be appreciated that by providing the planetary gear mechanism 300 such that the fan assembly 400 is radially closer to the outside of the enclosure 100, as the fan assembly 400 rotates and drives air circulation, the air may move in a tendency to expand obliquely outward to facilitate evacuation from the space between the air-cooled enclosure 500 and the enclosure 100, thereby improving the efficiency of air circulation; meanwhile, the fan assembly 400 also rotates along the circumferential direction of the rotating shaft 210, and can cool different circumferential positions of the casing 100, so as to stir heat at each position of the casing 100 in real time, further make heat distribution of the casing 100 more even, and integrally reduce temperature rise during motor operation. Even when the rotation speed of the rotation shaft 210 is low, the present application can maintain an excellent air cooling effect.

It can be further appreciated that, by arranging the reduction gear assembly 600 between the rotating shaft 210 and the fan shaft 340, when the rotating speed of the rotating shaft 210 is higher, the reduction gear assembly 600 can reduce the power of the rotating shaft 210 when being transmitted to the fan shaft 340, so as to reduce the rotating speed of the fan shaft 340, further avoid the fan assembly 400 from generating whistle when driving air to circulate, and avoid the fan assembly 400 from generating stronger mechanical vibration, so as to achieve the purpose of improving the NVH performance of the motor.

To sum up, the double-cooling motor provided by the application not only can ensure that the cooling effect of the motor is better when the rotating speed of the rotating shaft 210 is lower, but also can ensure that the NVH performance of the motor is better when the rotating speed of the rotating shaft 210 is higher.

Specifically, the reduction gear assembly 600 includes a first gear 610 provided on the rotation shaft 210 and a second gear 620 provided on the fan shaft 340, the first gear 610 is engaged with the second gear 620, and an outer diameter of the first gear 610 is smaller than an outer diameter of the second gear 620.

As shown in fig. 2 and 3, in the present embodiment, it is exemplarily illustrated that the first gear 610 and the second gear 620 are coaxially provided on the rotation shaft 210 and the fan assembly 400, respectively, and the first gear 610 and the second gear 620 are engaged to perform transmission. The outer diameter of the first gear 610 is smaller than the outer diameter of the second gear 620. It is understood that the maximum outer diameter of the ring gear for engagement of the first gear 610 is smaller than the maximum outer diameter of the ring gear for engagement of the second gear 620. When the linear speeds are the same, the gear having the larger outer diameter is rotated at a lower speed, so that the second gear 620 is rotated at a lower speed than the first gear 610, and thus the fan shaft 340 is rotated at a lower speed than the rotating shaft 210. The gear ratio of the reduction gear assembly 600 may be appropriately selected according to actual needs.

It can be appreciated that the present embodiment can simplify the transmission path between the rotation shaft 210 and the fan shaft 340 by providing the reduction gear assembly 600 to intermesh the first gear 610 and the second gear 620, and simplify the structure of the reduction gear assembly 600, improving convenience and compactness in its arrangement.

More specifically, the fan assembly 400 and the reduction gear assembly 600 are sequentially disposed within the air-cooled casing 500 in a direction away from the casing 100, and the second gear 620 includes a reduction gear inner ring 621, a reduction gear outer ring 622, and a reduction gear skeleton 623, the reduction gear inner ring 621 being disposed on the fan shaft 340, the reduction gear outer ring 622 being disposed over the fan shaft 340, the reduction gear skeleton 623 being disposed between the reduction gear inner ring 621 and the reduction gear outer ring 622.

As shown in fig. 2 and 3, in the present embodiment, it is exemplarily illustrated that the fan assembly 400 is close to the closed end of the casing 110 in the axial direction of the casing 110, and the reduction gear assembly 600 is far from the closed end of the casing 110 to be sequentially disposed in the air-cooled casing 500 in the direction far from the casing 100. The reduction gear inner ring 621 and the reduction gear outer ring 622 are both coaxially disposed with the fan shaft 340, and the reduction gear inner ring 621 is disposed on the fan shaft 340, while the reduction gear outer ring 622 is spaced from the fan shaft 340 by red paper, and the inside and outside of the reduction gear skeleton 623 are connected to the reduction gear inner ring 621 and the reduction gear outer ring 622, respectively. The reduction gear inner ring 621, the reduction gear outer ring 622, and the reduction gear skeleton 623 may be integrally provided. In the present embodiment, the first gear 610 is meshed with the reduction gear outer ring 622.

It can be appreciated that, in this embodiment, the second gear 620 with a larger outer diameter is set to the inner ring 621 of the reduction gear, the outer ring 622 of the reduction gear and the skeleton 623 of the reduction gear, which can reduce the obstruction of the reduction gear 600 to the ventilation of air while ensuring the transmission function of the reduction gear 600, thereby improving the efficiency of the ventilation of air and guaranteeing the air cooling effect of the motor.

Specifically, the outer diameter of the sun gear 310 is smaller than the outer diameter of the planet gears 330.

As shown in fig. 2 and 3, in the present embodiment, it is exemplarily illustrated that, as well, since the diameter of the sun gear 310 is smaller than that of the planet gears 330, the rotation speed of the planet gears 330 should be smaller than that of the sun gear 310. When the power of the rotation shaft 210 is transmitted to the planetary gear 330 through the sun gear 310, the rotation speed of the planetary gear 330 should also be less than that of the rotation shaft 210.

It will be appreciated that the present embodiment can reduce the rotational speed of the planet 330, including the rotational and orbital speeds of the planet 330, by setting the outer diameter of the planet 330 relatively large. When the rotation speed of the rotation shaft 210 is high, it can still make the planetary gear mechanism 300 run smoothly, so as to ensure the NVH performance of the motor.

More specifically, the fan assembly 400 and the planetary gear mechanism 300 are sequentially disposed in the air-cooled housing 500 in a direction away from the casing 100, and the planetary gear 330 includes a planetary inner ring 331, a planetary outer ring 332, and a planetary frame 333, the planetary inner ring 331 is disposed on the fan shaft 340, the planetary outer ring 332 is sleeved outside the fan shaft 340, and the planetary frame 333 is disposed between the planetary inner ring 331 and the planetary outer ring 332.

As shown in fig. 2 and 3, in the present embodiment, illustratively, the fan assembly 400 is close to the closed end of the housing 110 in the axial direction of the housing 110, and the planetary gear mechanism 300 is far from the closed end of the housing 110 to be disposed in sequence in the direction away from the casing 100; also, the planetary gear mechanism 300 may be further from the closed end of the housing 110 relative to the reduction gear assembly 600. And, as such, the planetary gear 330 having a larger outer diameter may be provided in a similar structure to the second gear 620, i.e., the planetary gear 330 includes a planetary inner ring 331 and a planetary outer ring 332 coaxially provided with the fan shaft 340, and a planetary frame 333 connecting the planetary inner ring 331 and the planetary outer ring 332. Wherein the inner planet ring 331 is connected to the fan shaft 340 and the outer planet ring 332 is meshed with the sun gear 310.

It can be appreciated that, in this embodiment, the planetary gear 330 with a larger outer diameter is set as the planetary gear inner ring 331, the planetary gear outer ring 332 and the planetary gear skeleton 333, so that the transmission function of the planetary gear mechanism 300 is ensured, and meanwhile, the obstruction of the planetary gear 330 to air ventilation is reduced, thereby improving the air ventilation efficiency and guaranteeing the air cooling effect of the motor.

Specifically, the outer side wall of the casing 100 is provided with a plurality of heat dissipation fins 130, the heat dissipation fins 130 are arranged along the circumferential direction of the casing 100, a heat dissipation channel 140 is formed between two adjacent heat dissipation fins 130, and the inner side of the air cooling casing 500 is abutted against the plurality of heat dissipation fins 130.

As shown in fig. 1 and 2, in the present embodiment, it is exemplarily illustrated that the heat radiating fins 130 may be integrally formed with the housing 110, which may be provided in a sheet shape, and provided in a radial direction of the housing 110. The heat dissipation fins 130 are provided in a plurality, and the plurality of heat dissipation fins 130 may be equally spaced along the circumferential direction of the housing 110. Since two adjacent heat radiating fins are enclosed to form one heat radiating passage 140, the number of heat radiating passages 140 may be equal to the number of heat radiating fins 130. One end of the opening of the air-cooled housing 500 is sleeved on the plurality of radiating fins 130 to be spaced from the closed section of the shell 110.

It can be appreciated that, in this embodiment, the heat dissipation fins 130 are provided to accelerate the heat dissipation speed, so that the air can take away the heat in the circulation process; meanwhile, the heat dissipation channels 140 formed by surrounding the two adjacent heat dissipation fins 130 can shorten the path of air circulation, so as to reduce the power loss of air and further improve the air cooling effect.

More specifically, the rotary shaft 210 is provided with a main oil passage 211 in an axial direction, a branch oil passage 212 communicating with the main oil passage 211 is provided in a radial direction, the rotor assembly 200 further includes a rotor core 220, the rotor core 220 is provided on the rotary shaft 210, and oil passing passages 221 are provided in the axial direction, the oil passing passages 221 are in one-to-one correspondence and communicate with the branch oil passages 212, the rotor core 220 is further provided with an oil slinger hole 222, the oil slinger hole 222 is connected through the oil passages 221 and an inner cavity of the casing 100, one end of the casing 100 is provided with an oil pump 700, and is provided with an oil pumping passage 121 communicating the oil pump 700 with the inner cavity of the casing 100, one end of the rotary shaft 210 is in transmission with the oil pump 700, and the main oil passage 211 is communicated with the oil pump 700.

As shown in fig. 2, in the present embodiment, it is exemplarily illustrated that an end of the rotation shaft 210 remote from the output end thereof may be disposed in the casing 100 and driven with the oil pump 700. The oil pump 700 may be provided on the end cap 120, and the end cap 120 may be further provided with an oil pumping passage 121 communicating the oil pump 700 with the inner cavity of the casing 100. At the end of the pump oil passage 121 remote from the oil pump 700, an oil filter may be further provided, which may be provided on the end cap 120, and serves to filter the cooling oil.

The rotor core 220 is sleeved on the rotating shaft 210 and rotates synchronously with the rotating shaft 210. The main oil gallery 211 may extend from an end of the shaft 210 near the oil pump 700 to an output end thereof, and may be provided in a counterbore structure. The oil separation passage 212 may be provided at a middle portion of the rotor core 220, and a plurality thereof are provided on the rotation shaft 210. The plurality of oil distribution channels 212 are disposed at equal intervals along the circumferential direction of the rotating shaft 210, and are all communicated with the rotating shaft 210.

As shown in fig. 2 and 4, in the present embodiment, the rotor core 220 may be provided with radial oil passages 223 in the radial direction, and oil passing passages 221 in the axial direction, the radial oil passages 223 being provided in the middle of the oil passing passages 221 and communicating to constitute a "T" shape. The radial oil passage 223 and the oil passage 221 may be provided with several groups along the circumferential direction of the rotor core 220 at intervals, and are in one-to-one correspondence with the oil distribution passages, and the oil passage 221 communicates with the oil distribution passages 212 through the radial oil passage 223. The oil-throwing holes 222 are provided at both ends of the oil passage 221 and connected to the inner cavity of the casing 100 through the oil passage 221.

It is understood that the cooling oil may be disposed directly in the interior cavity of the housing 100. When the rotation shaft 210 rotates, it drives the oil pump 700 to operate, so that the cooling oil pump 700 in the casing 100 is driven into the main oil gallery 211 of the rotation shaft 210 by the oil pump 700. After entering the main oil gallery 211, the cooling oil enters the oil passage 221 through the branch oil gallery 212 and the radial oil gallery 223 in this order. The cooling oil then circulates along both ends of the oil passage 221 and is brushed out of the oil slinger holes 222 to be returned to the inner cavity of the casing 100 again, thereby achieving circulation of the cooling oil within the rotor assembly 200 and causing the cooling oil to sequentially oil cool the rotor and the rotor core 220 during circulation.

More specifically, the double-cooled motor further includes a stator assembly 800, and the stator assembly 800 is disposed inside the casing 100 and sleeved outside the rotor assembly 200, with the oil slinger 222 facing the end of the stator assembly 800.

As shown in fig. 2 and 4, in the present embodiment, it is exemplarily illustrated that the stator assembly 800 is fixedly disposed in the casing 100, which is sleeved outside the rotor assembly 200, and which has a length in an axial direction greater than that of the rotor assembly 200, and the rotor assembly 200 is disposed at a middle portion of the stator assembly 800. The oil slinger hole 222 is provided obliquely on an end portion of the stator core and toward an end portion of the stator assembly 800.

It can be appreciated that, in this embodiment, by disposing the oil slinger hole 222 towards the end of the stator assembly 800, the end of the stator assembly 800 can be cooled when the cooling oil is slinged from the oil slinger hole 222, so as to further reduce the temperature rise of the motor.

More specifically, a spray oil duct 111 is further disposed on one side of the top of the casing 100, the spray oil duct 111 is communicated with the inner cavity of the casing 100 through a spray hole 112, the spray hole 112 is disposed at least right above the end of the stator assembly 800, and a communication oil duct 122 for communicating the spray oil duct 111 with the oil pump 700 is further disposed on the casing 100.

As shown in fig. 2, in the present embodiment, it is exemplarily illustrated that the spray oil passage 111 may extend along the closed end of the housing 110 along the open end of the housing 110, and is also provided as a counterbore. And along the circumference of the housing 110, the spray oil channels 111 may be equally spaced with a plurality of branches to increase the sprayable area. The spray oil passage 111 communicates with the oil pump 700 through the communication oil passage 122, i.e., in the present embodiment, the oil pump 700 should have one oil inlet and two oil outlets. The spray oil passage 111 communicates with the inner cavity of the casing 100 through spray holes 112, and the spray holes 112 are disposed in the radial direction of the casing 110 and may be disposed at least right above both end portions of the stator assembly 800.

It can be appreciated that when the rotating shaft 210 rotates, it can also drive the cooling oil pump 700 in the inner cavity of the casing 100 to the spray oil duct 111, and the cooling oil can be sprayed from the spray holes 112 after entering the spray oil duct 111 and at least sprayed on two ends of the stator assembly 800, so as to further improve the cooling effect on the stator assembly 800. It should be noted that the cooling liquid may be sprayed on only the top side of the stator assembly 800, because the bottom side of the stator assembly 800 is immersed in the cooling oil in the inner cavity of the casing 100, which has a better cooling effect.

It may be further appreciated that the spray oil duct 111 is disposed along the axial direction of the casing 100 and is close to the heat dissipation channel 140, and when air passes through the heat dissipation channel 140, it may further cool the cooling oil in the spray oil duct 111, so as to improve the cooling effect of the cooling oil on the motor, that is, the air cooling may cooperate with the oil cooling, so that the cooling effect of the motor is significantly improved.

Specifically, the planetary gear mechanism 300 further includes a planet carrier 350, a plurality of planet gears 330 are disposed at equal intervals along the circumferential direction of the outer ring gear 320, the planet carrier 350 is connected with the plurality of planet gears 330, a ring groove 520 is disposed on the air cooling jacket 500, a sliding block 360 is disposed on the planet carrier 350, and the sliding block 360 is slidably disposed in the ring groove 520.

As shown in fig. 2 and 4, in the present embodiment, it is exemplarily illustrated that the planetary gears 330 may be provided in two, and the two planetary gears 330 are symmetrically provided along the axis of the outer ring gear 320. Of course, in some embodiments, the planets 330 may also be provided as three, four, five, etc. The planet carrier 350 may be disposed in a ring shape and sleeved outside the rotating shaft 210 to reduce the influence on the ventilation. The planet carrier 350 is provided with a fixed shaft with one end penetrating through the planet gears 330, the fixed shaft corresponds to the planet gears 330 one by one, and the planet gears 330 are rotatably arranged on the fixed shaft. When the two planetary gears 330 revolve on the outer gear ring 320, the planetary carrier 350 can be driven to synchronously rotate around the rotating shaft 210. In this embodiment, the motor shaft may be coaxially disposed with the stationary shaft and rotatably disposed within the stationary shaft.

As shown in fig. 2 and 4, in the present embodiment, the other end of the fixed shaft extends along the closed end near the air-cooled casing 500 to protrude from the planet carrier 350 and form the sliding block 360. The inner side wall of the closed end of the air-cooled housing 500 may be provided with a corresponding ring groove 520. When the planet carrier 350 rotates, the slider 360 is slidably disposed within the ring groove 520.

It can be appreciated that, in this embodiment, by providing the planet carrier 350 and providing the slide block 360 on the planet carrier 350 and providing the ring groove 520 on the air-cooled housing 500, the planet carrier 350 can guide the revolution of the planet 330 by slidably arranging the slide block 360 in the ring groove 520, so as to improve the stability of the revolution of the planet 330, further reduce the mechanical vibration and noise, and improve the NVH performance of the motor.

The implementation principle of the double-cooling motor provided by the application is as follows:

when the rotating shaft 210 rotates, the rotating shaft drives the fan shaft 340 to rotate through the reduction gear assembly 600, the fan shaft 340 drives the fan assembly 400 to synchronously rotate when rotating, and the fan assembly 400 drives air to circulate when rotating, and the air enters from the through holes 510 of the air-cooled housing 500 and is discharged from the gap between the air-cooled housing 500 and the shell 110, so as to perform air cooling on the shell 100 of the motor in the circulation process; and the rotating shaft 210 further drives the sun gear 310 to rotate, when the sun gear 310 rotates, the planet gears 330 are driven to rotate around the axis of the sun gear, meanwhile, the planet gears 330 also revolve around the axis of the rotating shaft 210, and when the planet gears 330 revolve, the fan shaft 340 and the fan assembly 400 are driven to synchronously rotate around the axis of the rotating shaft 210, so that the fan assembly 400 performs air cooling on the casing 100 at different positions in the circumferential direction of the casing 100.

Meanwhile, when the rotation shaft 210 rotates, it drives the oil pump 700 to operate, so that a part of the oil pump 700 in the casing 100 is cooled by the oil pump 700 into the main oil gallery 211 of the rotation shaft 210. After entering the main oil gallery 211, the cooling oil enters the oil passage 221 through the branch oil gallery 212 and the radial oil gallery 223 in this order. The cooling oil then circulates along both ends of the oil passage 221 and is brushed out of the oil slinger holes 222 to be returned to the inner cavity of the casing 100 again, thereby achieving circulation of the cooling oil within the rotor assembly 200 and causing the cooling oil to sequentially oil cool the rotor and the rotor core 220 during circulation. Meanwhile, the oil pump 700 sends another part of cooling oil pump 700 to the spraying oil duct 111, and cooling oil can be sprayed out from the spraying holes 112 after entering the spraying oil duct 111 and at least sprayed on two ends of the stator assembly 800, so that the cooling effect on the stator assembly 800 is further improved.

The reduction gear assembly 600 is arranged between the rotating shaft 210 and the fan shaft 340, when the rotating speed of the rotating shaft 210 is higher, the reduction gear assembly 600 can reduce the power of the rotating shaft 210 when being transmitted to the fan shaft 340, so as to reduce the rotating speed of the fan shaft 340, further avoid the fan assembly 400 from generating sharp noise when driving air to circulate, and avoid the fan assembly 400 from generating stronger mechanical vibration, so as to achieve the aim of improving the NVH performance of the motor.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. A double-cooled motor, the double-cooled motor comprising:

a housing (100) arranged in the middle;

a rotor assembly (200) comprising a rotating shaft (210), wherein the rotating shaft (210) is rotatably arranged in the machine shell (100), one end of the rotating shaft extends out of the machine shell (100), and cooling oil is circularly arranged in the rotating shaft (210) so as to cool the rotating shaft (210) through the cooling oil;

the air cooling device comprises a planetary gear mechanism (300), a fan assembly (400) and an air cooling housing (500), wherein the planetary gear mechanism (300) and the fan assembly (400) are arranged outside the machine shell (100), the planetary gear mechanism (300) comprises a sun gear (310) arranged on a rotating shaft (210), an outer gear ring (320) sleeved outside the rotating shaft (210), a planet wheel (330) meshed between the sun gear (310) and the outer gear ring (320) and a fan shaft (340) rotatably arranged on the planet wheel (330), the fan shaft (340) and the rotating shaft (210) are driven by a group of reduction gear assemblies (600), the fan assembly (400) is arranged on the fan shaft (340), the air cooling housing (500) is connected with the machine shell (100) and is arranged outside the planetary gear mechanism (300) and the fan assembly (400), the inner side of the air cooling housing (500) and the outer side of the machine shell (100) are arranged at intervals, and the fan shaft (340) and a plurality of air cooling housings (510) are arranged at one side far away from the machine shell (100);

the reduction gear assembly (600) includes a first gear (610) disposed on the rotating shaft (210) and a second gear (620) disposed on the fan shaft (340), the first gear (610) is meshed with the second gear (620), and an outer diameter of the first gear (610) is smaller than an outer diameter of the second gear (620).

2. The double cooling motor according to claim 1, wherein the fan assembly (400) and the reduction gear assembly (600) are sequentially disposed in the air-cooled housing (500) in a direction away from the casing (100), the second gear (620) includes a reduction gear inner ring (621), a reduction gear outer ring (622), and a reduction gear skeleton (623), the reduction gear inner ring (621) is disposed on the fan shaft (340), the reduction gear outer ring (622) is disposed outside the fan shaft (340), and the reduction gear skeleton (623) is disposed between the reduction gear inner ring (621) and the reduction gear outer ring (622).

3. The double cooling electric machine according to claim 1, characterized in that the outer diameter of the sun wheel (310) is smaller than the outer diameter of the planet wheel (330).

4. A double cooling motor according to claim 3, wherein the fan assembly (400) and the planetary gear mechanism (300) are sequentially arranged in the air cooling housing (500) along a direction away from the casing (100), the planetary gear (330) comprises a planetary gear inner ring (331), a planetary gear outer ring (332) and a planetary gear skeleton (333), the planetary gear inner ring (331) is arranged on the fan shaft (340), the planetary gear outer ring (332) is sleeved outside the fan shaft (340), and the planetary gear skeleton (333) is arranged between the planetary gear inner ring (331) and the planetary gear outer ring (332).

5. The double-cooling motor according to claim 1, wherein a plurality of heat dissipation fins (130) are arranged on the outer side wall of the casing (100), the plurality of heat dissipation fins (130) are arranged along the circumferential direction of the casing (100), a heat dissipation channel (140) is formed between two adjacent heat dissipation fins (130), and the inner side of the air cooling housing (500) is abutted against the plurality of heat dissipation fins (130).

6. The double-cooling motor according to claim 5, wherein the rotating shaft (210) is provided with a main oil passage (211) in an axial direction, a branch oil passage (212) communicated with the main oil passage (211) is provided in a radial direction, the rotor assembly (200) further comprises a rotor core (220), the rotor core (220) is arranged on the rotating shaft (210) and is provided with oil passing passages (221) in the axial direction, the oil passing passages (221) are in one-to-one correspondence and communication with the branch oil passages (212), the rotor core (220) is further provided with oil throwing holes (222), the oil throwing holes (222) are communicated with the oil passing passages (221) and the inner cavity of the casing (100), one end of the casing (100) is provided with an oil pump (700), and is provided with an oil pump passage (121) communicated with the inner cavity of the casing (100), one end of the rotating shaft (210) is in transmission with the oil pump (700), and the main oil passage (211) is communicated with the oil pump (700).

7. The double-cooled electric machine of claim 6, further comprising a stator assembly (800), the stator assembly (800) being disposed within the housing (100) and nested outside the rotor assembly (200), the oil slinger (222) being oriented toward an end of the stator assembly (800).

8. The double-cooling motor according to claim 7, wherein a spray oil duct (111) is further provided on a top side of the casing (100), the spray oil duct (111) is communicated with an inner cavity of the casing (100) through a spray hole (112), the spray hole (112) is at least provided right above an end portion of the stator assembly (800), and a communication oil duct (122) for communicating the spray oil duct (111) and the oil pump (700) is further provided on the casing (100).

9. The double cooling motor according to claim 1, wherein the planetary gear mechanism (300) further comprises a planet carrier (350), the planet gears (330) are equidistantly arranged in the circumferential direction of the outer gear ring (320), the planet carrier (350) is connected with a plurality of the planet gears (330), an annular groove (520) is arranged on the air cooling housing (500), a sliding block (360) is arranged on the planet carrier (350), and the sliding block (360) is slidably arranged in the annular groove (520).