CN115733288A - Electric assembly and vehicle with same - Google Patents

Abstract

The invention discloses an electric assembly and a vehicle thereof. The electric assembly includes: a casing, the casing is provided with a cooling oil passage; a motor is arranged in the casing, and the motor It includes a stator, a rotor and a rotating shaft. The rotor is rotatably matched to the stator. The rotating shaft is connected to the rotor and driven by the rotor to rotate. A motor oil passage is constructed inside the rotating shaft. One end of the rotating shaft The end wall of the rotating shaft is provided with an oil inlet hole connecting the cooling oil passage and the motor oil passage, the peripheral wall of the rotating shaft is provided with a first oil outlet hole facing the stator, and the end wall at the other end of the rotating shaft is provided There are pressure balance holes. The electric assembly according to the embodiment of the present invention can balance the air pressure inside and outside the motor oil passage of the rotating shaft, so that the distribution of lubricating oil in the cooling oil passage is more balanced, and has the advantages of good cooling effect and high reliability.

Description

Electric assembly and vehicle with same

technical field

The invention relates to the technical field of vehicles, in particular to an electric assembly and a vehicle with the same.

Background technique

The electric assembly in the related art includes a housing and a motor. The motor includes a stator, a rotor and a rotating shaft. The housing is provided with a cooling oil passage, and the rotating shaft is provided with a motor oil passage. The motor oil passage communicates with the cooling oil passage. Part of the cooling medium can The cooling oil passage enters the motor oil passage to cool the rotor and stator to ensure the normal operation of the motor. However, when the rotating shaft rotates at high speed, it will generate a large centrifugal force, which will cause the motor oil passage to be in a negative pressure state, resulting in an excessive flow of cooling medium entering the motor oil passage, reducing the flow of cooling oil passage to other parts of the electric assembly. The flow of the distributed cooling medium makes the flow distribution of the cooling medium in the electric assembly unbalanced, the cooling effect is poor, and the reliability is low.

Contents of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present invention is to propose an electric assembly, which can balance the air pressure inside and outside the motor oil passage of the rotating shaft, so that the distribution of lubricating oil in the cooling oil passage is more balanced, and has good cooling effect and high reliability. advantage.

The invention also proposes a vehicle with the electric power assembly described above.

In order to achieve the above object, the embodiment of the first aspect of the present invention proposes an electric assembly, including: a casing, the casing is provided with a cooling oil passage; a motor, the motor is arranged in the casing, the The motor includes a stator, a rotor and a rotating shaft. The rotor is rotatably fitted to the stator. The rotating shaft is connected to the rotor and driven to rotate by the rotor. A motor oil passage is constructed inside the rotating shaft. The end wall at one end is provided with an oil inlet hole communicating with the cooling oil passage and the motor oil passage, the peripheral wall of the rotating shaft is provided with a first oil outlet hole facing the stator, and the end wall at the other end of the rotating shaft Equipped with air pressure balance hole.

The electric assembly according to the embodiment of the present invention can balance the air pressure inside and outside the motor oil passage of the rotating shaft, so that the distribution of lubricating oil in the cooling oil passage is more balanced, and has the advantages of good cooling effect and high reliability.

According to some specific embodiments of the present invention, the other end of the rotating shaft extends out of the stator.

According to some specific embodiments of the present invention, there are multiple first oil outlet holes arranged in at least two circles on the rotating shaft, and each circle of first oil outlet holes includes a plurality of oil outlet holes arranged in the circumferential direction of the rotating shaft The first oil outlet holes, the at least two circles of first oil outlet holes are respectively located on both sides of the rotor in the axial direction of the rotating shaft and do not exceed the stator.

According to some specific embodiments of the present invention, the inner peripheral surface of the rotating shaft is provided with an oil storage groove extending along its circumference, and a circle of first oil outlet holes farthest from the oil inlet holes passes through the oil storage groove.

According to some specific embodiments of the present invention, the air pressure balance hole runs through the end wall of the other end of the rotating shaft, and an oil baffle sheet adjacent to the air pressure balance hole is provided in the motor oil passage, and the oil baffle plate The sheet has vias.

According to some specific embodiments of the present invention, the central axis of the air pressure balance hole, the central axis of the rotating shaft and the central axis of the motor oil passage are coincident.

According to some specific embodiments of the present invention, the electric assembly further includes: a first motor bearing and a second motor bearing, the first motor bearing and the second motor bearing are installed in the housing, and the rotating shaft The two ends of the motor are respectively supported on the first motor bearing and the second motor bearing, and the cooling oil channels are respectively communicated with the first motor bearing and the second motor bearing.

According to some specific embodiments of the present invention, the first motor bearing is disposed adjacent to the air pressure balance hole, the cooling oil passage includes a first branch communicating with the first motor bearing, and the first branch includes : a first axial section, the first axial section extends along the axial direction of the housing; a radial section, the radial section extends along the radial direction of the housing and is connected to the first axial section The section communicates; the first inclined section communicates with the radial section and the first motor bearing respectively, and the first inclined section is relatively to the first axial section and the radial Segment tilt settings.

According to some specific embodiments of the present invention, the second motor bearing is arranged adjacent to the oil inlet hole, the cooling oil passage includes a second branch communicating with the second motor bearing, and the second branch includes : the second axial section, the second axial section extends along the axial direction of the housing; the second inclined section, the second inclined section is connected with the second axial section and the second motor respectively The bearings are connected, and the second inclined section is arranged obliquely relative to the second axial section.

According to some specific embodiments of the present invention, the stator is sleeved on the rotor, the first oil outlet hole faces the inner peripheral surface of the stator, and the cooling oil passage is provided with a hole facing the outer peripheral surface of the stator. Second oil outlet.

According to some specific embodiments of the present invention, the electric power assembly further includes: a speed reducer, the speed reducer is installed in the housing and connected to the rotating shaft in transmission, the speed reducer is provided with a transition oil passage, the The oil inlet hole communicates with the cooling oil passage through the transition oil passage.

According to some specific embodiments of the present invention, the speed reducer includes: an input shaft, the input shaft is rotatably mounted on the housing and connected to the rotating shaft in transmission, the transition oil passage is provided on the input shaft a transition shaft, the transition shaft is rotatably mounted on the housing and is in transmission connection with the input shaft; an output shaft, the output shaft is rotatably mounted in the housing and is in transmission connection with the transition shaft .

According to some specific embodiments of the present invention, the reducer further includes: a first input bearing and a second input bearing, the first input bearing and the second input bearing are mounted on the housing, and the input shaft The two ends of each are respectively supported by the first input bearing and the second input bearing, and the cooling oil passages communicate with the first input bearing and the second input bearing respectively.

According to some specific embodiments of the present invention, the reducer further includes: a first transition bearing and a second transition bearing, the first transition bearing and the second transition bearing are mounted on the housing, and the transition shaft The two ends of the transition shaft are respectively supported by the first transition bearing and the second transition bearing, and a transition shaft oil passage is constructed in the transition shaft, and the cooling oil passage is connected with the transition shaft oil passage and the first transition shaft respectively. The transition bearing communicates, the transition shaft is provided with a third oil outlet hole, and an oil passage gap connecting the third oil outlet hole and the second transition bearing is formed between the transition shaft and the housing.

According to some specific embodiments of the present invention, the reducer further includes: a first output bearing and a second output bearing, the first output bearing and the second output bearing are installed in the housing, and the output shaft The two ends of the output shaft are respectively supported on the first output bearing and the second output bearing; wherein, the output shaft is fixed with an output gear, and the output gear stirs the cooling oil by rotating with the output shaft to The first output bearing and the second output bearing.

According to the embodiment of the second aspect of the present invention, a vehicle is provided, including the electric power assembly according to the embodiment of the first aspect of the present invention.

According to the vehicle proposed in the embodiment of the second aspect of the present invention, by using the electric vehicle body described in the embodiment of the first aspect of the present invention, the air pressure inside and outside the motor oil passage of the rotating shaft can be balanced, so that the distribution of lubricating oil in the cooling oil passage is more efficient. Balanced, with the advantages of good cooling effect and high reliability.

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

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and comprehensible from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is a schematic structural diagram of an electric power assembly according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view of an electric power assembly according to an embodiment of the present invention.

Fig. 3 is a schematic diagram of a cooling channel path according to an embodiment of the present invention.

Fig. 4 is a cross-sectional view of an electric power assembly according to another embodiment of the present invention.

Reference signs:

Electric assembly 1,

Housing 100, cooling oil passage 110, first branch 120, first axial section 121, radial section 122, first inclined section 123, second branch 130, second axial section 131, second inclined section 132, the second oil outlet hole 140,

Motor 200, stator 210, rotor 220, rotating shaft 230, motor oil passage 231, oil inlet hole 232, first oil outlet hole 233, air pressure balance hole 234, oil storage tank 235, oil retainer 240, through hole 241,

The first motor bearing 300, the second motor bearing 310,

Reducer 400, first input bearing 410, second input bearing 420,

Input shaft 500, transition oil passage 510,

Transition shaft 600, transition shaft oil passage 610, third oil outlet hole 620, oil passage gap 630,

output shaft 700, output gear 710,

The first transition bearing 800, the second transition bearing 810,

The first output bearing 900 , the second output bearing 910 , the oil tank 920 , the oil pump 921 , the filter 922 , and the oil cooler 923 .

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Rear", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Axial", "Radial", "Circumferential" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, use a specific Azimuth configuration and operation, therefore, should not be construed as limiting the invention.

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

In the description of the present invention, "plurality" means two or more, and "several" means one or more.

An electric power assembly 1 according to an embodiment of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1-4 , the electric power assembly 1 of the embodiment of the present invention includes a housing 100 and a motor 200 .

The housing 100 is provided with a cooling oil passage 110, and the motor 200 is arranged in the housing 100. The motor 200 includes a stator 210, a rotor 220 and a shaft 230. The rotor 220 is rotatably fitted to the stator 210. The shaft 230 is connected to the rotor 220 and is controlled by the rotor. 220 drives the rotation, and the motor oil passage 231 is constructed in the rotating shaft 230. The end wall at one end of the rotating shaft 230 is provided with an oil inlet hole 232 connecting the cooling oil passage 110 and the motor oil passage 231. An oil outlet hole 233 , and an air pressure balance hole 234 is formed on the end wall of the other end of the rotating shaft 230 .

Wherein, the cooling medium, such as lubricating oil, can be passed into the cooling oil passage 110 and the motor oil passage 231, and the lubricating oil can flow in the cooling oil passage 110 and the motor oil passage 231 to cool and dissipate the parts of the motor 200 to ensure that the motor 200 normal work.

In addition, the electric assembly 1 can also be provided with an oil pump 921, a filter 922 and an oil cooler 923, the oil tank 920, the oil pump 921, the filter 922 and the oil cooler 923 can be arranged outside the housing 100, and the oil pump 921 can transfer lubricating oil pumped up, and provide power for the lubricating oil to flow in the cooling oil passage 110. Before the lubricating oil enters the oil pump 921, it can be coarsely filtered to prevent large-volume impurities from entering the oil pump 921. The lubricating oil is pumped out by the oil pump 921 and then passed through the filter 922 for fine filtration to completely remove impurities in the lubricating oil. The filtered lubricating oil is cooled by the oil cooler 923 and then passed into the cooling oil passage 110. The oil cooler 923 can be equipped with cooling fins to ensure lubrication The temperature of the oil is lower, which can better dissipate heat from the motor 200 .

According to the electric assembly 1 of the embodiment of the present invention, by setting the motor 200 in the housing 100, the housing 100 can protect the motor 200, the motor 200 includes a stator 210, a rotor 220 and a rotating shaft 230, and the rotor 220 is rotatably matched with the stator 210, the rotating shaft 230 is connected to the rotor 220 and driven to rotate by the rotor 220, wherein the rotating shaft 230 and the rotor 220 rotate synchronously, for example, the stator 210 can be sleeved on the rotor 220 or the rotor 220 can be sleeved on the stator 210.

In addition, the casing 100 is provided with a cooling oil passage 110, and the motor oil passage 231 is constructed in the rotating shaft 230. The end wall of one end of the rotating shaft 230 is provided with an oil inlet hole 232 connecting the cooling oil passage 110 and the motor oil passage 231. The peripheral wall is provided with a first oil outlet hole 233 facing the stator 210, that is, the rotating shaft 230 is a hollow structure, and the oil inlet hole 232 can be arranged on the end of the rotating shaft 230 facing the cooling oil passage 110, so that the lubricating oil in the cooling oil passage 110 can enter The motor oil passage 231 and the first oil outlet hole 233 run through the peripheral wall of the rotating shaft 230, so that the lubricating oil in the motor oil passage 231 can flow to the stator 210, and after the lubricating oil enters the motor oil passage 231 through the cooling oil passage 110, the lubricating oil can flow from the first An oil outlet hole 233 dissipates heat to the stator 210, wherein the stator 210 can be sleeved on the rotor 220, the lubricating oil can be thrown out to the stator 210 by the centrifugal force generated by the rotation of the rotating shaft 230, and the speed of the lubricating oil flowing to the stator 210 is faster, improving the The cooling efficiency of the lubricating oil on the stator 210 ensures the reliability of the motor 200 .

In addition, the end wall of the other end of the rotating shaft 230 is provided with an air pressure balance hole 234. The air pressure balancing hole 234 is provided at the end of the rotating shaft 230 away from the cooling oil passage 110, and the air pressure balancing hole 234 penetrates the above-mentioned portion of the rotating shaft 230 along the axial direction of the rotating shaft 230. another side. In this way, the gas outside the motor oil passage 231 can enter the motor oil passage 231 through the air pressure balance hole 234, so that the air pressure inside the motor oil passage 231 tends to be the same as the external air pressure, and the pressure in the motor oil passage 231 is increased to avoid cooling. The lubricating oil in the oil passage 110 is sucked into the motor oil passage 231, and the lubricating oil in the cooling oil passage 110 can be more distributed to the rest of the rotating parts in the electric assembly 1, that is, the flow rate of the lubricating oil in the motor oil passage 231 It is balanced with the flow of lubricating oil distributed to the rest of the rotating parts in the electric assembly 1 , so as to improve the overall rotation efficiency and heat dissipation effect of the electric assembly 1 .

Wherein, in the embodiment of the present invention, the air pressure balance hole 234 penetrates the rotating shaft 230 along the axial direction of the rotating shaft 230, and the central axis of the air pressure balancing hole 234 and the central axis of the rotating shaft 230 can coincide. By setting the axial direction of the air pressure balance hole 234 parallel to the rotation axis of the rotating shaft 230, the centrifugal force at the air pressure balance hole 234 can be greatly reduced, so that the external air can enter the motor from the air pressure balance hole 234 more smoothly. The oil passage 231 is used to increase the pressure in the motor oil passage 231 to prevent the pressure in the motor oil passage 231 from being in a negative pressure state.

Therefore, the electric assembly 1 according to the embodiment of the present invention can balance the air pressure inside and outside the motor oil passage 231 of the rotating shaft 230, so that the distribution of lubricating oil in the cooling oil passage 110 is more balanced, and has the advantages of good cooling effect and high reliability.

According to some specific embodiments of the present invention, as shown in Figure 2 and Figure 4, the other end of rotating shaft 230 protrudes from stator 210, namely the end of rotating shaft 230 that is provided with air pressure balance hole 234 protrudes from stator 210, can improve air pressure balance like this The hole 234 communicates with the external space efficiently, thereby keeping the air pressure inside the motor oil passage 231 in balance with the outside air pressure, further avoiding negative pressure in the motor oil passage 231 , and lubricating oil can be evenly distributed in the electric assembly 1 . Moreover, the other end of the rotating shaft 230 protrudes from the stator 210 , which can facilitate the fixing of the other end of the rotating shaft 230 and the casing 100 .

According to some specific embodiments of the present invention, as shown in FIGS. A plurality of first oil outlet holes 233 arranged in the circumferential direction.

In this way, lubricating oil can flow out of the motor oil passage 231 from the plurality of first oil outlet holes 233 in each circle, thereby ensuring that the lubricating oil can flow to the stator 210 more evenly in the circumferential direction of the rotating shaft 230, so that the lubricating oil can communicate with the rotor 220 and The stator 210 is fully in contact, and the cooling effect is better.

Moreover, at least two circles of first oil outlet holes 233 are respectively located on both sides of the rotor 220 in the axial direction of the rotating shaft 230 and do not exceed the stator 210, so that the multi-circle first oil outlet holes 233 are more scattered in the axial direction of the rotating shaft 230, The lubricating oil dissipates heat more evenly on the shaft of the stator 210 to improve the cooling effect of the lubricating oil on the stator 210 .

Further, as shown in FIG. 2 and FIG. 4 , the inner peripheral surface of the rotating shaft 230 is provided with an oil storage tank 235 extending along its circumference, and the first oil outlet hole 233 in a circle farthest from the oil inlet hole 232 penetrates the oil storage tank 235 .

Specifically, the diameter of the oil storage groove 235 is greater than the diameter of the inner peripheral surface of the rotating shaft 230, that is, the oil storage groove 235 is recessed outward from the inner peripheral surface of the rotating shaft 230 along the radial direction of the rotating shaft 230, so that after the lubricating oil enters the motor oil passage 231, In the process of flowing toward the air pressure balance hole 234, it will enter the oil storage tank 235, and part of the lubricating oil can be stored through the oil storage tank 235, so as to prevent the lubricating oil in the motor oil passage 231 from directly flowing to the air pressure balance hole 234, thereby reducing the flow of lubricating oil to the air pressure balance hole 234. The flow of the balance hole 234 prevents lubricating oil from flowing out from the air pressure balance hole 234 .

According to some specific embodiments of the present invention, as shown in FIG. 2 and FIG. 4 , the air pressure balance hole 234 runs through the end wall of the other end of the rotating shaft 230 , and an oil baffle 240 adjacent to the air pressure balance hole 234 is provided in the motor oil passage 231 , The oil deflector 240 has a through hole 241 .

For example, the oil baffle 240 can be a die-casting part, and the oil baffle 240 can further prevent lubricating oil from flowing out of the motor oil passage 231 along the air pressure balance hole 234, so that the lubricating oil mainly flows from the first oil outlet 233 to the stator and rotor 210, improving The cooling efficiency of the stator 210 is improved, and since the through hole 241 communicates with the air pressure balance hole 234, the air can enter the motor oil passage 231 through the through hole 241, thereby ensuring the air pressure balance inside and outside the motor oil passage 231, and avoiding lubrication in the cooling oil passage 110 The oil is excessively flowing to the motor oil passage 231. Moreover, the oil deflector 240 is installed on the rotating shaft 230 after the internal structure of the motor oil passage 231 (such as the oil storage tank 235 ) is processed.

According to some specific embodiments of the present invention, as shown in FIGS. 2-4 , the central axis of the air pressure balance hole 234 , the central axis of the rotating shaft 230 and the central axis of the motor oil passage 231 coincide.

The coincidence of the central axis of the air pressure balance hole 234 with the central axis of the rotating shaft 230 can minimize the centrifugal force generated by the air pressure balancing hole 234 when the rotating shaft 230 rotates, thereby preventing lubricating oil from being thrown out from the air pressure balancing hole 234 .

The coincidence of the central axis of the rotating shaft 230 with the central axis of the motor oil passage 231 can ensure that the distance from the peripheral wall of the motor oil passage 231 to the central axis of the rotating shaft 230 is the same, so that the centrifugal force of each part of the peripheral wall of the motor oil passage 231 is the same, and the lubricating oil can be drawn Evenly thrown out, so that the lubricating oil can contact the rotor 220 and the stator 210 more evenly, and the heat of each part of the rotor 220 and the stator 210 can be effectively reduced.

According to some specific embodiments of the present invention, as shown in FIGS. 2 and 3 , the electric assembly 1 further includes a first motor bearing 300 and a second motor bearing 310 .

The first motor bearing 300 and the second motor bearing 310 are installed in the housing 100, the two ends of the rotating shaft 230 are respectively supported on the first motor bearing 300 and the second motor bearing 310, and the cooling oil passage 110 is connected to the first motor bearing 300 and the second motor bearing 310 respectively. The second motor bearing 310 communicates.

For example, steps can be provided at both ends of the rotating shaft 230, and the first motor bearing 300 and the second motor bearing 310 stop against the steps in the axial direction of the rotating shaft 230, so as to fix the relative position of the rotating shaft 230 and the housing 100 and prevent the rotating shaft from 230 is displaced relative to the housing 100 in its axial or radial direction, and the rotating shaft 230 can rotate more smoothly relative to the housing 100, and the lubricating oil can flow to the first motor bearing 300 and the second motor bearing 300 through the cooling oil passage 110 The motor bearing 310 is used to cool and dissipate the first motor bearing 300 and the second motor bearing 310, and at the same time lubricate the first motor bearing 300 and the second motor bearing 310, which is beneficial to extend the first motor bearing 300 and the second motor bearing The service life of the motor bearing 310 is improved, and the rotation is smoother.

Further, as shown in FIG. 2 , the first motor bearing 300 is disposed adjacent to the air pressure balance hole 234 , and the cooling oil passage 110 includes a first branch 120 communicating with the first motor bearing 300 . The first branch 120 includes a first axial section 121 , a radial section 122 and a first inclined section 123 .

The first axial section 121 extends along the axial direction of the housing 100, the radial section 122 extends along the radial direction of the housing 100 and communicates with the first axial section 121, and the first inclined section 123 is respectively connected to the radial section 122 and the second axial section 123. A motor bearing 300 communicates, and the first inclined section 123 is arranged obliquely relative to the first axial section 121 and the radial section 122 . Wherein, the first branch 120 can guide the lubricating oil to the first motor bearing 300 to cool and lubricate the first motor bearing 300 through the lubricating oil.

In this way, the interference between the first branch 120 and other parts (such as the stator 210) can be avoided, thereby ensuring the smooth flow of lubricating oil in the first branch 120, and the layout of the first branch 120 is more reasonable, which is conducive to reducing the electric current. Due to the overall volume of the assembly 1 and the long path of the first branch 120 , lubricating oil can be directed to multiple components through the first branch 120 , thereby improving the overall cooling efficiency of the motor 200 assembly.

In addition, the first inclined section 123 can slow down the flow speed of lubricating oil flowing from the first radial section 122 to the first motor bearing 300, so that the lubricating oil can slowly flow to the first motor bearing 300, and the lubricating oil can fully carry out the first motor bearing 300. Cooling and lubrication prolong the service life of the first motor bearing 300 .

As shown in Figure 2, the second motor bearing 310 is arranged adjacent to the oil inlet hole 232, the cooling oil channel 110 includes a second branch 130 communicating with the second motor bearing 310, the second branch 130 includes a second axial section 131 and The second inclined section 132 .

The second axial section 131 extends along the axial direction of the housing 100 , the second inclined section 132 communicates with the second axial section 131 and the second motor bearing 310 respectively, and the second inclined section 132 is inclined relative to the second axial section 131 set up.

The second branch 130 can guide the lubricating oil to the second motor bearing 310 to cool and lubricate the second motor bearing 310 through the lubricating oil. Wherein, the second inclined section 132 can guide the lubricating oil to flow to the second motor bearing 310, and the second inclined section 132 can slow down the flow speed of the lubricating oil from the second axial section 131 to the second motor bearing 310, so that the lubricating oil can slowly flow to For the second motor bearing 310 , the lubricating oil can fully cool and lubricate the second motor bearing 310 , prolonging the service life of the second motor bearing 310 .

According to some specific embodiments of the present invention, as shown in FIG. 2 and FIG. 3 , the stator 210 is sheathed on the rotor 220 , the first oil outlet hole 233 faces the inner peripheral surface of the stator 210 , and the cooling oil passage 110 is provided with a hole facing the stator 210 . The second oil outlet hole 140 on the outer peripheral surface.

Specifically, the second oil outlet hole 140 can be provided on the side of the first axial section 121 facing the stator 210, and the second oil outlet hole 140 does not exceed both ends of the stator 210, so that a part of lubricating oil can be supplied by the first One oil outlet hole 233 flows to the inner peripheral surface of the stator 210, another part of lubricating oil can flow to the outer peripheral surface of the stator 210 through the second oil outlet hole 140, and then the inner peripheral surface and the outer peripheral surface of the stator 210 can be cooled by the lubricating oil to dissipate heat. Further improving the heat dissipation efficiency of the stator 210 is beneficial to make the motor 200 work efficiently.

According to some specific embodiments of the present invention, as shown in FIGS. 2 and 3 , the electric assembly 1 further includes a speed reducer 400 .

The reducer 400 is mounted on the housing 100 and connected to the rotating shaft 230 in transmission. The reducer 400 is connected to one end of the rotating shaft 230 provided with the oil inlet hole 232. The reducer 400 is provided with a transition oil passage 510, and the oil inlet hole 232 passes through the transition oil passage. 510 communicates with the cooling oil passage 110 .

The lubricating oil can enter the transition oil passage 510 from the cooling oil passage 110, and then flow into the motor oil passage 231 through the transition oil passage 510 and the oil inlet hole 232, so that the communication between the cooling oil passage 110 and the motor oil passage 231 is realized, and the lubricating oil can be Smoothly flowing into the motor oil passage 231 , and when the lubricating oil flows through the transition oil passage 510 , it can also cool and dissipate the reducer 400 , thereby reducing the temperature of the reducer 400 . Since the speed reducer 400 and the motor 200 are installed in the casing 100 together, the number of parts of the electric assembly 1 can be reduced, and the volume of the electric assembly 1 can be reduced.

Further, as shown in FIG. 2 , the speed reducer 400 also includes an input shaft 500 , a transition shaft 600 and an output shaft 700 .

The input shaft 500 is rotatably mounted on the casing 100 and is in drive connection with the rotating shaft 230 , the transition oil passage 510 is provided on the input shaft 500 , the transition shaft 600 is rotatably mounted on the casing 100 and is in transmission connection with the input shaft 500 , and the output shaft 700 It is rotatably mounted on the casing 100 and is in driving connection with the transition shaft 600 .

Specifically, the rotation axis of the input shaft 500 and the rotation axis of the rotating shaft 230 can coincide, and the central axis of the transition oil passage 510, the central axis of the oil inlet hole 232 and the central axis of the motor oil passage 231 can coincide, so that the rotating shaft 230 can be realized. The power transmission with the input shaft 500 can ensure continuous communication between the transition oil passage 510 , the oil inlet hole 232 and the motor oil passage 231 when the rotating shaft 230 rotates with the input shaft 500 .

In addition, the input shaft 500, the transition shaft 600 and the output shaft 700 are arranged differently, and the transition shaft 600 is located between the input shaft 500 and the output shaft 700, the rotation axis of the input shaft 500, the rotation axis of the transition shaft 600 and the output shaft The rotation axes of 700 can be parallel to facilitate power transmission among the input shaft 500 , the transition shaft 600 and the output shaft 700 , and can reduce the axial size of the casing 100 .

It should be noted that the input shaft 500, the transition shaft 600 and the output shaft 700 are all provided with gears, the transition shaft 600 has two gears, one gear of the transition shaft 600 meshes with the gear of the input shaft 500, and the other of the transition shaft 600 The gears mesh with the gears of the output shaft 700, so that the power output by the rotating shaft 230 is transmitted to the wheels through the speed reducer 400, the speed of the wheels is lower than that of the rotating shaft 230, the torque of the wheels is higher than that of the rotating shaft 230, and the vehicle moves more smoothly.

Furthermore, as shown in FIGS. 2 and 3 , the speed reducer 400 further includes a first input bearing 410 and a second input bearing 420 .

The first input bearing 410 and the second input bearing 420 are installed in the casing 100, the two ends of the input shaft 500 are respectively supported by the first input bearing 410 and the second input bearing 420, and the cooling oil passage 110 is connected with the first input bearing 410 and the second input bearing 420 respectively. The second input bearing 420 communicates.

By arranging the first input bearing 410 and the second input bearing 420 , the rotation of the input shaft 500 relative to the casing 100 is smoother, which is beneficial to improve the power transmission efficiency between the input shaft 500 and the rotating shaft 230 . In addition, lubricating oil can flow to the first input bearing 410 and the second input bearing 420 through the cooling oil passage 110, so as to cool and dissipate the first input bearing 410 and the second input bearing 420, and at the same time, the first input bearing 410 and the The second input bearing 420 is lubricated, which is beneficial to prolong the service life of the first input bearing 410 and the second input bearing 420 and make the rotation more smooth.

Optionally, as shown in FIGS. 2 and 3 , the speed reducer 400 further includes a first transition bearing 800 and a second transition bearing 810 .

The first transition bearing 800 and the second transition bearing 810 are installed in the housing 100, and the two ends of the transition shaft 600 are respectively supported by the first transition bearing 800 and the second transition bearing 810, and the transition shaft 600 is constructed with a transition shaft oil passage 610, The cooling oil passage 110 communicates with the transition shaft oil passage 610 and the first transition bearing 800 respectively, the transition shaft 600 is provided with a third oil outlet hole 620 , and the second oil outlet hole 140 and the second oil outlet hole 140 connected between the transition shaft 600 and the housing 100 are formed. The oil passage gap 630 of the second transition bearing 810 .

The first transition bearing 800 and the second transition bearing 810 can fix the relative position of the transition shaft 600 and the casing 100, avoiding the displacement of the transition shaft 600 relative to the casing 100 in its axial or radial direction, and allowing the transition shaft 600 to move relative to the casing 100. The casing 100 rotates more smoothly, which is beneficial to improve the power transmission efficiency between the transition shaft 600 and the input shaft 500 .

Wherein, a part of the lubricating oil can directly flow to the first transition bearing 800 through the cooling oil passage 110 to lubricate and dissipate heat to the first transition bearing 800, and another part of the lubricating oil can flow into the transition shaft oil passage 610 through the cooling oil passage 110. Lubricating oil then flows to the second transition bearing 810 through the third oil outlet hole 620 and the oil gap 630 to dissipate heat and lubricate the second transition bearing 810, thus, both the first transition bearing 800 and the second transition bearing 810 are Heat dissipation is beneficial to prolong the service life of the first transition bearing 800 and the second transition bearing 810, and the rotation is smoother.

According to some specific embodiments of the present invention, as shown in FIGS. 2 and 3 , the speed reducer 400 further includes a first output bearing 900 and a second output bearing 910 .

The first output bearing 900 and the second output bearing 910 are mounted on the housing 100 , and the two ends of the output shaft 700 are respectively supported by the first output bearing 900 and the second output bearing 910 . The first output bearing 900 and the second output bearing 910 can fix the relative position of the output shaft 700 and the housing 100, avoid the displacement of the output shaft 700 relative to the housing 100 in its axial or radial direction, and make the output shaft 700 relatively The smoother rotation of the casing 100 is beneficial to improve the power transmission efficiency between the transition shaft 600 and the output shaft 700 .

Wherein, the output shaft 700 is fixed with an output gear 710 , and the output gear 710 stirs lubricating oil to the first output bearing 900 and the second output bearing 910 by rotating with the output shaft 700 .

Specifically, lubricating oil is stored in the oil tank 920 of the electric assembly 1, and the output gear 710 can extend below the oil level of the lubricating oil in the oil tank 920, so that when the output shaft 700 drives the output gear 710 to rotate, the lubricating oil can be Stirring is used to cool and dissipate heat from the first output bearing 900 and the second output bearing 910, which is beneficial to prolong the service life of the first output bearing 900 and the second output bearing 910, and make the rotation more smooth.

A vehicle including an electric powertrain 1 will be described below according to an embodiment of the present invention with reference to the drawings.

According to the vehicle according to the embodiment of the present invention, by using the above-mentioned electric power assembly 1 according to the embodiment of the present invention, the air pressure inside and outside the motor oil passage 231 of the rotating shaft 230 can be balanced, so that the distribution of lubricating oil in the cooling oil passage 110 is more balanced, and it has the function of cooling. Good effect and high reliability.

Other configurations and operations of the electric power assembly 1 according to the embodiment of the present invention and the vehicle having the same are known to those skilled in the art, and will not be described in detail here.

In the description of this specification, descriptions with reference to the terms "specific embodiment", "specific example" and the like mean that specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or embodiment of the present invention. example. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the invention is defined by the claims and their equivalents.

Claims (16)

1. An electric assembly, characterized in that, comprising: a casing, the casing is provided with a cooling oil passage; A motor, the motor is arranged in the housing, the motor includes a stator, a rotor and a rotating shaft, the rotor is rotatably fitted to the stator, the rotating shaft is connected to the rotor and driven to rotate by the rotor, A motor oil passage is constructed inside the rotating shaft, an end wall at one end of the rotating shaft is provided with an oil inlet hole connecting the cooling oil passage and the motor oil passage, and a second wall facing the stator is provided on the peripheral wall of the rotating shaft. An oil outlet hole, the end wall of the other end of the rotating shaft is provided with an air pressure balance hole. 2. The electric assembly according to claim 1, wherein the other end of the rotating shaft protrudes from the stator. 3. The electric assembly according to claim 1, characterized in that there are multiple first oil outlet holes arranged in at least two circles on the rotating shaft, and each circle of first oil outlet holes includes A plurality of the first oil outlet holes are arranged in the circumferential direction of the rotating shaft, and the at least two circles of first oil outlet holes are respectively located on both sides of the rotor in the axial direction of the rotating shaft and do not exceed the stator. 4. The electric assembly according to claim 3, characterized in that, the inner peripheral surface of the rotating shaft is provided with an oil storage tank extending along its circumference, and the circle of first oil outlet farthest from the oil inlet hole is The hole passes through the oil storage tank. 5. The electric assembly according to claim 1, wherein the air pressure balance hole runs through the end wall of the other end of the rotating shaft, and the motor oil passage is provided with a valve adjacent to the air pressure balance hole. The oil baffle is provided with through holes. 6 . The electric assembly according to claim 1 , wherein a central axis of the air pressure balance hole, a central axis of the rotating shaft and a central axis of the motor oil passage are coincident. 6 . 7. The electric assembly according to claim 1, further comprising: The first motor bearing and the second motor bearing, the first motor bearing and the second motor bearing are installed in the housing, and the two ends of the rotating shaft are respectively supported by the first motor bearing and the second motor bearing. The motor bearing, the cooling oil channel communicates with the first motor bearing and the second motor bearing respectively. 8. The electric assembly according to claim 7, wherein the first motor bearing is arranged adjacent to the air pressure balance hole, and the cooling oil passage includes a first branch communicating with the first motor bearing , the first branch includes: a first axial segment extending in the axial direction of the housing; a radial segment extending radially of the housing and communicating with the first axial segment; a first inclined section, the first inclined section communicates with the radial section and the first motor bearing respectively, and the first inclined section is arranged obliquely relative to the first axial section and the radial section . 9. The electric assembly according to claim 7, wherein the second motor bearing is disposed adjacent to the oil inlet hole, and the cooling oil passage includes a second branch communicating with the second motor bearing , the second branch includes: a second axial segment extending in the axial direction of the housing; A second inclined section, the second inclined section communicates with the second axial section and the second motor bearing respectively, and the second inclined section is arranged obliquely relative to the second axial section. 10. The electric assembly according to claim 1, wherein the stator is sheathed on the rotor, the first oil outlet hole faces the inner peripheral surface of the stator, and the cooling oil passage is provided with The second oil outlet hole faces the outer peripheral surface of the stator. 11. The electric assembly according to claim 1, further comprising: A speed reducer, the speed reducer is installed on the housing and connected to the rotating shaft through transmission, the speed reducer is provided with a transition oil passage, and the oil inlet hole communicates with the cooling oil passage through the transition oil passage. 12. The electric assembly according to claim 11, wherein the speed reducer comprises: an input shaft, the input shaft is rotatably mounted on the housing and is in drive connection with the rotating shaft, and the transition oil passage is provided on the input shaft; a transition shaft, the transition shaft is rotatably mounted on the housing and is in transmission connection with the input shaft; an output shaft, the output shaft is rotatably mounted on the housing and is in driving connection with the transition shaft. 13. The electric assembly according to claim 12, wherein the speed reducer further comprises: The first input bearing and the second input bearing, the first input bearing and the second input bearing are installed in the housing, and the two ends of the input shaft are respectively supported by the first input bearing and the second input bearing Two input bearings, the cooling oil passage communicates with the first input bearing and the second input bearing respectively. 14. The electric assembly according to claim 12, wherein the speed reducer further comprises: The first transition bearing and the second transition bearing, the first transition bearing and the second transition bearing are installed in the housing, and the two ends of the transition shaft are respectively supported by the first transition bearing and the second transition bearing Two transition bearings, the transition shaft is constructed with a transition shaft oil passage, the cooling oil passage is respectively connected with the transition shaft oil passage and the first transition bearing, the transition shaft is provided with a third oil outlet hole, An oil passage gap communicating with the third oil outlet hole and the second transition bearing is formed between the transition shaft and the housing. 15. The electric assembly according to claim 10, further comprising: The first output bearing and the second output bearing, the first output bearing and the second output bearing are installed in the housing, and the two ends of the output shaft are respectively supported by the first output bearing and the second output bearing Second output bearing; Wherein, the output shaft is fixed with an output gear, and the output gear stirs cooling oil to the first output bearing and the second output bearing by rotating with the output shaft. 16. A vehicle, characterized by comprising: the electric power assembly according to any one of claims 1-15.

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