CN115733288A - Electric assembly and vehicle with same - Google Patents
Electric assembly and vehicle with same Download PDFInfo
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- CN115733288A CN115733288A CN202110990329.7A CN202110990329A CN115733288A CN 115733288 A CN115733288 A CN 115733288A CN 202110990329 A CN202110990329 A CN 202110990329A CN 115733288 A CN115733288 A CN 115733288A
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Abstract
The invention discloses an electric assembly and a vehicle with the same, wherein the electric assembly comprises: a housing provided with a cooling oil passage; the motor, the motor is located in the casing, the motor includes stator, rotor and pivot, the rotor rotatably cooperate in the stator, the pivot connect in the rotor and by the rotor drives rotatoryly, the structure has motor oil way in the pivot, the end wall of the one end of pivot is equipped with the intercommunication the cooling oil duct with the inlet port of motor oil way, the perisporium of pivot is equipped with the orientation the first oil outlet of stator, the end wall of the other end of pivot is equipped with atmospheric pressure balance hole. The electric assembly provided by the embodiment of the invention can balance the air pressure inside and outside the motor oil duct of the rotating shaft, so that the distribution of the lubricating oil in the cooling oil duct is more balanced, and the electric assembly has the advantages of good cooling effect, high reliability and the like.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to an electric assembly and a vehicle with the same.
Background
The electric assembly in the related art comprises a shell and a motor, wherein the motor comprises a stator, a rotor and a rotating shaft, the shell is provided with a cooling oil duct, the rotating shaft is provided with a motor oil duct, the motor oil duct is communicated with the cooling oil duct, and part of cooling media can enter the motor oil duct from the cooling oil duct to cool the rotor and the stator so as to ensure the normal work of the motor. However, when the rotating shaft rotates at a high speed, a large centrifugal force is generated, and then the inside of the motor oil duct is in a negative pressure state, so that the flow rate of the cooling medium entering the motor oil duct is too large, the flow rate of the cooling medium distributed to other parts of the electric assembly by the cooling oil duct is reduced, the flow rate distribution of the cooling medium in the electric assembly is unbalanced, the cooling effect is poor, and the reliability is low.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide an electric assembly, which is capable of balancing air pressures inside and outside a motor oil duct of a rotating shaft, so that the distribution of lubricating oil in a cooling oil duct is more balanced, and the electric assembly has the advantages of good cooling effect, high reliability, and the like.
The invention also provides a vehicle with the electric assembly.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides an electric assembly, including: the shell is provided with a cooling oil duct; the motor, the motor is located in the casing, the motor includes stator, rotor and pivot, the rotor rotatably cooperate in the stator, the pivot connect in the rotor and by the rotor drives rotatoryly, the structure has motor oil way in the pivot, the end wall of the one end of pivot is equipped with the intercommunication the cooling oil duct with the inlet port of motor oil way, the perisporium of pivot is equipped with the orientation the first oil outlet of stator, the end wall of the other end of pivot is equipped with atmospheric pressure balance hole.
The electric assembly provided by the embodiment of the invention can balance the air pressure inside and outside the motor oil duct of the rotating shaft, so that the distribution of the lubricating oil in the cooling oil duct is more balanced, and the electric assembly has the advantages of good cooling effect, high reliability and the like.
According to some embodiments of the invention, the other end of the shaft extends out of the stator.
According to some embodiments of the invention, the first oil outlet holes are plural and arranged in at least two circles on the rotating shaft, each circle of the first oil outlet holes includes plural first oil outlet holes arranged along the circumferential direction of the rotating shaft, and the at least two circles of the 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 embodiments of the present invention, the inner circumferential surface of the rotating shaft is provided with an oil storage groove extending along a circumferential direction thereof, and a circle of the first oil outlet holes farthest from the oil inlet hole penetrates through the oil storage groove.
According to some embodiments of the present invention, the air pressure balance hole penetrates through an end wall of the other end of the rotating shaft, an oil blocking sheet adjacent to the air pressure balance hole is disposed in the motor oil passage, and the oil blocking sheet is provided with a through hole.
According to some embodiments of the present invention, 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 coincide with each other.
According to some specific embodiments of the invention, the electric motor assembly further comprises: first motor bearing and second motor bearing, first motor bearing with the second motor bearing install in the casing, the both ends of pivot support respectively in first motor bearing with the second motor bearing, the cooling oil duct respectively with first motor bearing with second motor bearing intercommunication.
According to some demonstrative embodiments of the invention, the first motor bearing is disposed adjacent to the air pressure balancing hole, the cooling gallery includes a first branch in communication with the first motor bearing, the first branch including: a first axial segment extending in an axial direction of the housing; a radial segment extending in a radial direction of the housing and communicating with the first axial segment; a first angled section in communication with the radial section and the first motor bearing, respectively, the first angled section disposed obliquely relative to the first axial section and the radial section.
According to some specific embodiments of the invention, the second motor bearing is disposed adjacent to the oil inlet hole, the cooling oil gallery includes a second branch communicating with the second motor bearing, the second branch including: a second axial segment extending in an axial direction of the housing; a second angled section in communication with the second axial section and the second motor bearing, respectively, the second angled section disposed obliquely relative to the second axial section.
According to some embodiments of the present invention, the stator is sleeved on the rotor, the first oil outlet hole faces the inner circumferential surface of the stator, and the cooling oil passage is provided with a second oil outlet hole facing the outer circumferential surface of the stator.
According to some specific embodiments of the invention, the electric motor assembly further comprises: the speed reducer is installed in the shell and in transmission connection with the rotating shaft, the speed reducer is provided with a transition oil duct, and the oil inlet hole is communicated with the cooling oil duct through the transition oil duct.
According to some specific embodiments of the invention, the decelerator comprises: the input shaft is rotatably arranged on the shell and is in transmission connection with the rotating shaft, and the transition oil duct is arranged on the input shaft; the transition shaft is rotatably arranged on the shell and is in transmission connection with the input shaft; and the output shaft is rotatably arranged on the shell and is in transmission connection with the transition shaft.
According to some specific embodiments of the invention, the reducer further comprises: the cooling oil passage is communicated with the first input bearing and the second input bearing respectively.
According to some specific embodiments of the invention, the decelerator further comprises: first transition bearing and second transition bearing, first transition bearing with second transition bearing install in the casing, the both ends of transition axle support respectively in first transition bearing with second transition bearing, be constructed with the transition axle oil duct in the transition axle, the cooling oil duct respectively with the transition axle oil duct with first transition bearing intercommunication, the transition axle is equipped with the third oil outlet, the transition axle with form the intercommunication between the casing the third oil outlet with the oily clearance of crossing of second transition bearing.
According to some specific embodiments of the invention, the decelerator further comprises: the first output bearing and the second output bearing are mounted on the shell, and two ends of the output shaft are respectively supported by the first output bearing and the second output bearing; wherein an output gear is fixed to the output shaft, and the output gear stirs up the cooling oil to the first output bearing and the second output bearing by rotating with the output shaft.
According to a second aspect embodiment of the invention, a vehicle is provided, comprising the electric motor assembly according to the first aspect embodiment of the invention.
According to the vehicle provided by the embodiment of the second aspect of the invention, by using the electric vehicle body provided by the embodiment of the first aspect of the invention, the air pressure inside and outside the motor oil passage of the rotating shaft can be balanced, the distribution of the lubricating oil in the cooling oil passage is more balanced, and the advantages of good cooling effect, high reliability and the like are achieved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of a motorized assembly according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view of a motorized assembly according to an embodiment of the present invention.
FIG. 3 is a schematic diagram of a cooling flume path according to an embodiment of the present invention.
FIG. 4 is a cross-sectional view of an electric motor assembly according to another embodiment of the present invention.
Reference numerals:
an electric assembly 1,
The cooling oil passage comprises a shell 100, a cooling oil passage 110, a first branch passage 120, a first axial section 121, a radial section 122, a first inclined section 123, a second branch passage 130, a second axial section 131, a second inclined section 132, a second oil outlet 140,
The motor 200, the stator 210, the rotor 220, the rotating shaft 230, the motor oil channel 231, the oil inlet 232, the first oil outlet 233, the air pressure balance hole 234, the oil storage groove 235, the oil baffle 240, the via hole 241, the oil outlet,
A first motor bearing 300, a second motor bearing 310,
A speed reducer 400, a first input bearing 410, a second input bearing 420,
A transition shaft 600, a transition shaft oil passage 610, a third oil outlet 620, an oil passing gap 630,
An output shaft 700, an output gear 710,
A first transition bearing 800, a second transition bearing 810,
First output bearing 900, second output bearing 910, oil tank 920, oil pump 921, filter 922, oil cooler 923.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.
In the description of the present invention, "a plurality" means two or more, and "several" means one or more.
An electric module 1 according to an embodiment of the present invention is described below with reference to the drawings.
As shown in fig. 1 to 4, the electric motor assembly 1 according to 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, the motor 200 is disposed in the housing 100, the motor 200 includes a stator 210, a rotor 220 and a rotating shaft 230, the rotor 220 is rotatably fitted to the stator 210, the rotating shaft 230 is connected to the rotor 220 and is driven to rotate by the rotor 220, a motor oil passage 231 is configured in the rotating shaft 230, an oil inlet 232 communicating the cooling oil passage 110 and the motor oil passage 231 is disposed in an end wall of one end of the rotating shaft 230, a first oil outlet 233 facing the stator 210 is disposed in a peripheral wall of the rotating shaft 230, and an air pressure balancing hole 234 is disposed in an end wall of the other end of the rotating shaft 230.
Cooling media such as lubricating oil can be introduced 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 various parts of the motor 200, so that normal operation of the motor 200 is ensured.
In addition, electric assembly 1 may also be equipped with oil pump 921, filter 922 and oil cooler 923, oil tank 920, oil pump 921, filter 922 and oil cooler 923 may be located outside casing 100, oil pump 921 may be taken up lubricating oil, and provide the power that flows in cooling oil duct 110 for lubricating oil, lubricating oil can carry out the colating earlier before getting into oil pump 921, avoid bulky impurity to get into oil pump 921, lubricating oil carries out the essence through filter 922 after being taken out by oil pump 921, in order thoroughly to get rid of the impurity in the lubricating oil, lubricating oil after the filtration carries out cooling through oil cooler 923 and then gets into cooling oil duct 110, oil cooler 923 may be equipped with radiating fin, in order to guarantee that the temperature of lubricating oil is lower, can dispel the heat to motor 200 better.
According to the electric assembly 1 of the embodiment of the invention, the housing 100 can protect the motor 200 by disposing the motor 200 in the housing 100, the motor 200 includes the stator 210, the rotor 220 and the rotating shaft 230, the rotor 220 is rotatably fitted to the stator 210, the rotating shaft 230 is connected to the rotor 220 and is driven by the rotor 220 to rotate, wherein the rotating shaft 230 and the rotor 220 rotate synchronously, for example, the stator 210 may be sleeved on the rotor 220 or the rotor 220 may be sleeved on the stator 210.
In addition, the housing 100 is provided with the cooling oil passage 110, the rotating shaft 230 is internally configured with a motor oil passage 231, an end wall at one end of the rotating shaft 230 is provided with an oil inlet 232 communicating the cooling oil passage 110 and the motor oil passage 231, a circumferential wall of the rotating shaft 230 is provided with a first oil outlet 233 facing the stator 210, that is, the rotating shaft 230 is of a hollow structure, the oil inlet 232 can be arranged at one 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, the first oil outlet 233 penetrates through the circumferential wall of the rotating shaft 230, so that the lubricating oil in the motor oil passage 231 can flow to the stator 210, after the lubricating oil enters the motor oil passage 231 through the cooling oil passage 110, the lubricating oil can dissipate heat from the first oil outlet 233 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 a centrifugal force generated by rotation of the rotating shaft 230, so that the lubricating oil flows to the stator 210 at a higher speed, thereby improving the heat dissipation efficiency of the lubricating oil on the stator 210 and ensuring the reliability of the operation of the motor 200.
In addition, an end wall of the other end of the rotating shaft 230 is provided with an air pressure balancing hole 234, the air pressure balancing hole 234 is provided at one end of the rotating shaft 230 far from the cooling oil gallery 110, and the air pressure balancing hole 234 penetrates the other end of the rotating shaft 230 in the axial direction of the rotating shaft 230. Therefore, gas outside the motor oil channel 231 can enter the motor oil channel 231 through the air pressure balancing hole 234, so that the air pressure inside the motor oil channel 231 and the air pressure outside the motor oil channel 231 tend to be the same, the pressure intensity in the motor oil channel 231 is improved, further, lubricating oil in the cooling oil channel 110 is prevented from being sucked into the motor oil channel 231, the lubricating oil in the cooling oil channel 110 can be more distributed to other rotating parts in the electric assembly 1, namely, the flow rate of the lubricating oil in the motor oil channel 231 and the flow rate of the lubricating oil distributed to other rotating parts in the electric assembly 1 are kept balanced, and the integral rotating efficiency and heat dissipation effect of the electric assembly 1 are improved.
In the embodiment of the present invention, the air pressure balance hole 234 penetrates through the rotating shaft 230 along the axial direction of the rotating shaft 230, and the central axis of the air pressure balance hole 234 may coincide with the central axis of the rotating shaft 230, because the rotating shaft 230 may generate a centrifugal force along the circumferential direction when the rotating shaft 230 rotates, the centrifugal force at the air pressure balance hole 234 may be greatly reduced by arranging the axial direction of the air pressure balance hole 234 and the rotating axis of the rotating shaft 230 in parallel, so that external air may more smoothly enter the motor oil passage 231 from the air pressure balance hole 234, so as to increase the pressure inside the motor oil passage 231, and prevent the pressure inside 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 the lubricating oil in the cooling oil passage 110 is more balanced, and the electric assembly has the advantages of good cooling effect, high reliability, and the like.
According to some embodiments of the present invention, as shown in fig. 2 and 4, the other end of the rotating shaft 230 extends out of the stator 210, that is, the end of the rotating shaft 230 provided with the air pressure balancing hole 234 extends out of the stator 210, so that the communication efficiency between the air pressure balancing hole 234 and the external space can be improved, the air pressure inside the motor oil channel 231 can be kept balanced with the external air pressure, the generation of negative pressure in the motor oil channel 231 can be further avoided, and the lubricating oil can be uniformly distributed in the electric assembly 1. Also, the other end of the rotation shaft 230 protrudes out of the stator 210, which may facilitate the fixing of the other end of the rotation shaft 230 and the housing 100.
According to some embodiments of the present invention, as shown in fig. 2 to 4, the first oil outlet holes 233 are plural and arranged in at least two circles on the rotating shaft 230, and each circle of the first oil outlet holes 233 includes the plural first oil outlet holes 233 arranged along the circumferential direction of the rotating shaft 230.
Thus, the lubricating oil can flow out of the motor oil channel 231 from the first oil outlet holes 233 in each circle, so that the lubricating oil can more uniformly flow to the stator 210 in the circumferential direction of the rotating shaft 230, the lubricating oil is in full contact with the rotor 220 and the stator 210, and the cooling effect is better.
Moreover, at least two circles of the first oil outlet holes 233 are respectively located on two sides of the rotor 220 in the axial direction of the rotating shaft 230 and do not exceed the stator 210, so that the plurality of circles of the first oil outlet holes 233 are more dispersed in the axial direction of the rotating shaft 230, and the heat dissipation of the lubricating oil to the stator 210 on the shaft of the stator 210 is more uniform, so as to improve the cooling effect of the lubricating oil to the stator 210.
Further, as shown in fig. 2 and 4, the inner circumferential surface of the rotating shaft 230 is provided with an oil storage groove 235 extending along the circumferential direction thereof, and the first oil outlet 233 of the circle farthest from the oil inlet 232 penetrates the oil storage groove 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 along the radial direction of the rotating shaft 230 from the inner peripheral surface of the rotating shaft 230, so that after the lubricating oil enters the motor oil channel 231, the lubricating oil enters the oil storage groove 235 in the process of flowing towards the air pressure balance hole 234, and part of the lubricating oil can be stored through the oil storage groove 235, so that the lubricating oil in the motor oil channel 231 is prevented from directly flowing to the air pressure balance hole 234, the flow rate of the lubricating oil flowing to the air pressure balance hole 234 can be reduced, and the lubricating oil is prevented from flowing out from the air pressure balance hole 234.
According to some embodiments of the present invention, as shown in fig. 2 and 4, the air pressure balance hole 234 penetrates through the end wall of the other end of the rotating shaft 230, an oil blocking sheet 240 is disposed in the motor oil passage 231 and adjacent to the air pressure balance hole 234, and the oil blocking sheet 240 is provided with a through hole 241.
For example, oil blocking sheet 240 may be a die casting, oil blocking sheet 240 may further block lubricating oil from flowing out of motor oil channel 231 along air pressure balance hole 234, so that lubricating oil mainly flows to stator and rotor 210 through first oil outlet 233, cooling efficiency of stator 210 is improved, and because via hole 241 is communicated with air pressure balance hole 234, air may enter motor oil channel 231 through via hole 241, thereby ensuring air pressure balance inside and outside motor oil channel 231, and avoiding lubricating oil in cooling oil channel 110 from excessively flowing to motor oil channel 231. The oil blocking plate 240 is mounted on the rotating shaft 230 after the internal structure (e.g., the oil reservoir 235) of the motor oil passage 231 is processed.
According to some embodiments of the present invention, as shown in fig. 2 to 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 are coincident with each other.
The center axis of the pressure balance hole 234 coincides with the center axis of the rotation shaft 230, so that the centrifugal force generated by the pressure balance hole 234 when the rotation shaft 230 rotates can be reduced as much as possible, and the lubricating oil can be prevented from being thrown out of the pressure balance hole 234.
The coincidence of the central axis of the rotating shaft 230 and the central axis of the motor oil channel 231 can ensure that the distances from the peripheral wall of the motor oil channel 231 to the central axis of the rotating shaft 230 are the same, so that the centrifugal force of each part of the peripheral wall of the motor oil channel 231 is the same, the lubricating oil can be uniformly thrown out, the lubricating oil can be uniformly contacted with the rotor 220 and the stator 210, and the heat of each part of the rotor 220 and the stator 210 can be effectively reduced.
According to some embodiments of the present invention, as shown in fig. 2 and 3, the electric powertrain 1 further comprises a first motor bearing 300 and a second motor bearing 310.
First motor bearing 300 and second motor bearing 310 are installed in casing 100, and the both ends of pivot 230 support respectively in first motor bearing 300 and second motor bearing 310, and cooling oil duct 110 communicates with first motor bearing 300 and second motor bearing 310 respectively.
For example, steps may be disposed at two ends of the rotating shaft 230, the first motor bearing 300 and the second motor bearing 310 may abut against the steps in the axial direction of the rotating shaft 230, so as to fix the relative positions of the rotating shaft 230 and the casing 100, thereby preventing the rotating shaft 230 from moving in the axial direction or the radial direction relative to the casing 100, and enabling the rotating shaft 230 to rotate more smoothly relative to the casing 100, and the lubricating oil may flow into the first motor bearing 300 and the second motor bearing 310 through the cooling oil duct 110, so as to cool and dissipate the first motor bearing 300 and the second motor bearing 310, and lubricate the first motor bearing 300 and the second motor bearing 310, which is beneficial to prolonging the service lives of the first motor bearing 300 and the second motor bearing 310, and enables the rotation to be smoother.
Further, as shown in fig. 2, first motor bearing 300 is disposed adjacent to air pressure balancing hole 234, and cooling gallery 110 includes first branch passage 120 communicating with first motor bearing 300. The first branch 120 includes a first axial segment 121, a radial segment 122, and a first oblique segment 123.
The first axial section 121 extends in the axial direction of the casing 100, the radial section 122 extends in the radial direction of the casing 100 and communicates with the first axial section 121, the first inclined section 123 communicates with the radial section 122 and the first motor bearing 300, respectively, and the first inclined section 123 is disposed obliquely with respect to the first axial section 121 and the radial section 122. Wherein the first branch 120 may guide the lubricating oil to the first motor bearing 300 to cool and lubricate the first motor bearing 300 by the lubricating oil.
Like this, can avoid first branch road 120 to take place to interfere with other spare parts (for example stator 210), and then guarantee that lubricating oil circulates smoothly in first branch road 120, and first branch road 120 arranges fairly rationally, is favorable to reducing electric assembly 1's whole volume, and first branch road 120 route is longer moreover, can be through first branch road 120 with lubricating oil guide to a plurality of spare parts, and then improve the whole cooling efficiency of motor 200 assembly.
In addition, first slope section 123 can slow down the flow velocity that lubricating oil flowed to first motor bearing 300 by first radial section 122, makes lubricating oil slowly flow to first motor bearing 300, and lubricating oil can carry out abundant cooling and lubrication to first motor bearing 300, prolongs first motor bearing 300's life.
As shown in fig. 2, a second motor bearing 310 is disposed adjacent to the oil inlet hole 232, and the cooling gallery 110 includes a second branch 130 communicating with the second motor bearing 310, and the second branch 130 includes a second axial section 131 and a second inclined section 132.
The second axial segment 131 extends in the axial direction of the casing 100, the second inclined segment 132 communicates with the second axial segment 131 and the second motor bearing 310, respectively, and the second inclined segment 132 is disposed obliquely with respect to the second axial segment 131.
The second branch 130 may guide the lubricating oil to the second motor bearing 310 to cool and lubricate the second motor bearing 310 by the lubricating oil. Wherein, second slope section 132 can guide lubricating oil flow direction second motor bearing 310, and second slope section 132 can slow down lubricating oil and flow to second motor bearing 310's flow velocity by second axial section 131, makes lubricating oil slowly flow to second motor bearing 310, and lubricating oil can carry out abundant cooling and lubrication to second motor bearing 310, prolongs second motor bearing 310's life.
According to some embodiments of the present invention, as shown in fig. 2 and 3, the stator 210 is sleeved on the rotor 220, the first oil outlet holes 233 face the inner circumferential surface of the stator 210, and the cooling oil passage 110 is provided with the second oil outlet holes 140 facing the outer circumferential surface of the stator 210.
Specifically, the second oil outlet hole 140 may be disposed on one side of the first axial section 121 facing the stator 210, and the second oil outlet hole 140 does not exceed two ends of the stator 210, so that a portion of the lubricating oil may flow from the first oil outlet hole 233 to the inner circumferential surface of the stator 210, and another portion of the lubricating oil may flow from the second oil outlet hole 140 to the outer circumferential surface of the stator 210, and then both the inner circumferential surface and the outer circumferential surface of the stator 210 may be cooled and dissipated by the lubricating oil, thereby further improving the heat dissipation efficiency of the stator 210, and facilitating the motor 200 to be in a high-efficiency working state.
According to some embodiments of the invention, as shown in fig. 2 and 3, the electric motor assembly 1 further comprises a reducer 400.
The speed reducer 400 is installed in the housing 100 and is in transmission connection with the rotating shaft 230, the speed reducer 400 is connected to one end of the rotating shaft 230, where the oil inlet 232 is provided, the speed reducer 400 is provided with a transition oil passage 510, and the oil inlet 232 is communicated with the cooling oil passage 110 through the transition oil passage 510.
Lubricating oil can get into transition oil duct 510 by cooling oil duct 110, and rethread transition oil duct 510 and inlet port 232 flow in motor oil duct 231, so realized cooling oil duct 110 and motor oil duct 231's intercommunication, lubricating oil can flow in motor oil duct 231 smoothly, and lubricating oil can also cool off heat dissipation to reduction gear 400 when flowing through transition oil duct 510, and then reduce reduction gear 400's temperature. Since the speed reducer 400 and the motor 200 are mounted together to the housing 100, the number of parts of the electric motor assembly 1 can be reduced, and the size of the electric motor assembly 1 can be reduced.
Further, as shown in fig. 2, the reducer 400 further includes an input shaft 500, a transition shaft 600, and an output shaft 700.
Specifically, the rotation axis of the input shaft 500 and the rotation axis of the rotating shaft 230 may coincide, and the central axis of the transition oil duct 510, the central axis of the oil inlet 232, and the central axis of the motor oil duct 231 may coincide, so that power transmission between the rotating shaft 230 and the input shaft 500 may be achieved, and the transition oil duct 510, the oil inlet 232, and the motor oil duct 231 may be continuously communicated when the rotating shaft 230 and the input shaft 500 rotate.
In addition, the input shaft 500, the transition shaft 600 and the output shaft 700 are arranged in a different shaft manner, the transition shaft 600 is positioned 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 rotation axis of the output shaft 700 can be parallel, power transmission among the input shaft 500, the transition shaft 600 and the output shaft 700 is facilitated, and the axial size of the housing 100 can be reduced.
It should be noted that the input shaft 500, the transition shaft 600 and the output shaft 700 are all provided with two gears, two gears are provided for the transition shaft 600, one gear of the transition shaft 600 is meshed with the gear of the input shaft 500, and the other gear of the transition shaft 600 is meshed with the gear 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 rotating 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 motion is smoother.
Further, as shown in fig. 2 and 3, the 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 at the housing 100, both ends of the input shaft 500 are supported at the first input bearing 410 and the second input bearing 420, respectively, and the cooling oil gallery 110 is communicated with the first input bearing 410 and the second input bearing 420, respectively.
By providing the first input bearing 410 and the second input bearing 420, the input shaft 500 rotates more smoothly with respect to the housing 100, which is advantageous for improving the power transmission efficiency between the input shaft 500 and the rotating shaft 230. In addition, the lubricating oil may flow to the first input bearing 410 and the second input bearing 420 through the cooling oil passage 110 to cool and dissipate heat of the first input bearing 410 and the second input bearing 420, and may lubricate the first input bearing 410 and the second input bearing 420, which is beneficial to prolonging the service life of the first input bearing 410 and the second input bearing 420, and may rotate more smoothly.
Optionally, as shown in fig. 2 and 3, the 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 on the shell 100, two ends of the transition shaft 600 are respectively supported on the first transition bearing 800 and the second transition bearing 810, a transition shaft oil duct 610 is constructed in the transition shaft 600, the cooling oil duct 110 is respectively communicated with the transition shaft oil duct 610 and the first transition bearing 800, the transition shaft 600 is provided with a third oil outlet hole 620, and an oil passing gap 630 for communicating the second oil outlet hole 140 and the second transition bearing 810 is formed between the transition shaft 600 and the shell 100.
The first transition bearing 800 and the second transition bearing 810 may fix relative positions of the transition shaft 600 and the housing 100, prevent the transition shaft 600 from being displaced relative to the housing 100 in an axial direction or a radial direction thereof, and enable the transition shaft 600 to rotate more smoothly relative to the housing 100, which is beneficial to improving power transmission efficiency between the transition shaft 600 and the input shaft 500.
A part of the lubricating oil can directly flow into the first transition bearing 800 through the cooling oil passage 110 to lubricate and dissipate heat of the first transition bearing 800, another part of the lubricating oil can flow into the transition shaft oil passage 610 through the cooling oil passage 110, and the part of the lubricating oil flows into the second transition bearing 810 through the third oil outlet 620 and the oil gap 630 to dissipate heat and lubricate the second transition bearing 810, so that the first transition bearing 800 and the second transition bearing 810 are both dissipated heat, the service lives of the first transition bearing 800 and the second transition bearing 810 are prolonged, and the rotation is smoother.
According to some embodiments of the present invention, as shown in fig. 2 and 3, the 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 to the housing 100, and both ends of the output shaft 700 are supported by the first output bearing 900 and the second output bearing 910, respectively. The first output bearing 900 and the second output bearing 910 can fix the relative positions of the output shaft 700 and the housing 100, prevent the output shaft 700 from being displaced relative to the housing 100 in the axial direction or the radial direction, and enable the output shaft 700 to rotate more smoothly relative to the housing 100, which is beneficial to improving the power transmission efficiency between the transition shaft 600 and the output shaft 700.
An output gear 710 is fixed to the output shaft 700, and the output gear 710 stirs up the lubricating oil to the first output bearing 900 and the second output bearing 910 by rotating with the output shaft 700.
Specifically, the lubricant 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 lubricant in the oil tank 920, so that when the output shaft 700 drives the output gear 710 to rotate, the lubricant can be stirred up to cool and dissipate heat of the first output bearing 900 and the second output bearing 910, which is beneficial to prolonging the service life of the first output bearing 900 and the second output bearing 910, and the rotation is smoother.
A vehicle according to an embodiment of the present invention, which includes an electric motor assembly 1, is described below with reference to the drawings.
According to the vehicle provided by the embodiment of the invention, by utilizing the electric assembly 1 provided by the embodiment of the 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 the lubricating oil in the cooling oil passage 110 is more balanced, and the advantages of good cooling effect, high reliability and the like are achieved.
Other constructions and operations of the electric powertrain 1 and the vehicle having the same according to the embodiment of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.
In the description herein, references to the description of "a particular embodiment," "a particular example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (16)
1. An electric motor assembly, comprising:
the shell is provided with a cooling oil duct;
the motor, the motor is located in the casing, the motor includes stator, rotor and pivot, the rotor rotatably cooperate in the stator, the pivot connect in the rotor and by the rotor drives rotatoryly, the structure has motor oil way in the pivot, the end wall of the one end of pivot is equipped with the intercommunication the cooling oil duct with the inlet port of motor oil way, the perisporium of pivot is equipped with the orientation the first oil outlet of stator, the end wall of the other end of pivot is equipped with atmospheric pressure balance hole.
2. The electrical assembly of claim 1, wherein the other end of the shaft extends beyond the stator.
3. The electric motor assembly according to claim 1, wherein the first oil outlet holes are plural and arranged in at least two circles on the rotating shaft, each circle of the first oil outlet holes includes plural first oil outlet holes arranged along a circumferential direction of the rotating shaft, and the at least two circles of the first oil outlet holes are respectively located on both sides of the rotor in an axial direction of the rotating shaft and do not exceed the stator.
4. The electric assembly according to claim 3, wherein the inner peripheral surface of the rotating shaft is provided with an oil storage groove extending along the circumferential direction thereof, and a circle of the first oil outlet holes farthest from the oil inlet hole penetrates through the oil storage groove.
5. The electric assembly according to claim 1, wherein the air pressure balance hole penetrates through an end wall of the other end of the rotating shaft, an oil blocking sheet adjacent to the air pressure balance hole is arranged in the motor oil channel, and the oil blocking sheet is provided with a through hole.
6. The electric motor assembly as recited in claim 1, wherein a central axis of the air pressure balancing hole, a central axis of the shaft, and a central axis of the motor oil passage coincide.
7. The electric powertrain of claim 1, further comprising:
first motor bearing and second motor bearing, first motor bearing with the second motor bearing install in the casing, the both ends of pivot support respectively in first motor bearing with the second motor bearing, the cooling oil duct respectively with first motor bearing with second motor bearing intercommunication.
8. The electric powertrain of claim 7, wherein the first motor bearing is disposed adjacent the air pressure balancing hole, the cooling gallery includes a first branch in communication with the first motor bearing, the first branch including:
a first axial segment extending in an axial direction of the housing;
a radial segment extending in a radial direction of the housing and communicating with the first axial segment;
a first angled section in communication with the radial section and the first motor bearing, respectively, the first angled section disposed obliquely relative to the first axial section and the radial section.
9. The electric powertrain of claim 7, wherein the second motor bearing is disposed adjacent the oil inlet hole, the cooling gallery including a second branch in communication with the second motor bearing, the second branch including:
a second axial segment extending in an axial direction of the housing;
a second angled section in communication with the second axial section and the second motor bearing, respectively, the second angled section disposed obliquely relative to the second axial section.
10. The electric motor assembly according to claim 1, wherein the stator is provided to the rotor, the first oil outlet hole faces an inner circumferential surface of the stator, and the cooling oil passage is provided with a second oil outlet hole facing an outer circumferential surface of the stator.
11. The electric powertrain of claim 1, further comprising:
the speed reducer is installed in the shell and in transmission connection with the rotating shaft, the speed reducer is provided with a transition oil duct, and the oil inlet hole is communicated with the cooling oil duct through the transition oil duct.
12. The power assembly of claim 11, wherein the speed reducer comprises:
the input shaft is rotatably arranged on the shell and is in transmission connection with the rotating shaft, and the transition oil duct is arranged on the input shaft;
the transition shaft is rotatably arranged on the shell and is in transmission connection with the input shaft;
and the output shaft is rotatably arranged on the shell and is in transmission connection with the transition shaft.
13. The electric powertrain of claim 12, wherein the speed reducer further comprises:
the cooling oil passage is communicated with the first input bearing and the second input bearing respectively.
14. The electrical assembly of claim 12, wherein the speed reducer further comprises:
the oil cooling device comprises a first transition bearing and a second transition bearing, wherein the first transition bearing and the second transition bearing are installed in the shell, two ends of the transition shaft are respectively supported on the first transition bearing and the second transition bearing, a transition shaft oil duct is constructed in the transition shaft, a cooling oil duct is respectively communicated with the transition shaft oil duct and the first transition bearing, the transition shaft is provided with a third oil outlet, and a communication is formed between the transition shaft and the shell.
15. The electromotive assembly of claim 10, further comprising:
the first output bearing and the second output bearing are mounted on the shell, and two ends of the output shaft are respectively supported by the first output bearing and the second output bearing;
wherein an output gear is fixed to the output shaft, and the output gear stirs up the 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 electromotive assembly of any one of claims 1-15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110990329.7A CN115733288A (en) | 2021-08-26 | 2021-08-26 | Electric assembly and vehicle with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110990329.7A CN115733288A (en) | 2021-08-26 | 2021-08-26 | Electric assembly and vehicle with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115733288A true CN115733288A (en) | 2023-03-03 |
Family
ID=85290076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110990329.7A Pending CN115733288A (en) | 2021-08-26 | 2021-08-26 | Electric assembly and vehicle with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115733288A (en) |
-
2021
- 2021-08-26 CN CN202110990329.7A patent/CN115733288A/en active Pending
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