Motor with non-uniformly arranged oil guide ring through holes, power assembly and electric vehicle

Abstract

The utility model provides a motor with non-uniformly arranged oil guide ring through holes, a power assembly and an electric vehicle. The motor comprises a shell, a stator and an oil guide ring, the shell is provided with an oil discharge port, the oil discharge port is used for discharging oil in the shell, the oil guide ring and the stator are arranged adjacently along the axial direction of the motor, the oil guide ring comprises a plurality of through holes, each through hole is used for transmitting oil to cool a winding, and each through hole penetrates through the oil guide ring along the radial direction of the motor. The plurality of through holes comprise a plurality of first through holes and a plurality of second through holes, the plurality of first through holes are sequentially arranged at intervals in the circumferential direction of the motor, the plurality of second through holes are sequentially arranged at intervals, and the distance between any two adjacent first through holes is smaller than the distance between any two adjacent second through holes; the distance between each first through hole and the oil discharge port is larger than the distance between each second through hole and the oil discharge port. According to the motor, uniform heat dissipation of the winding end part of the stator can be realized so as to improve the heat dissipation effect of the motor.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a motor, a power assembly and an electric vehicle with non-uniformly arranged oil guide ring through holes. Background Art

[0002] During operation, the motor generates a lot of heat, which causes its operating temperature to rise. At this time, oil cooling is usually used to dissipate heat from the motor to ensure that the motor is in good working condition. The part of the stator winding extending from the iron core in the motor generates high heat and is difficult to dissipate, which makes the part of the winding extending from the iron core a bottleneck for reducing the temperature of the motor. However, the existing motor has poor heat dissipation effect on the part of the winding extending from the iron core, which makes the internal structure of the motor complex. Utility Model Content

[0003] The present application provides a motor with non-uniformly arranged oil guide ring through holes, which can evenly dissipate heat from the stator winding ends and improve the heat dissipation effect by optimizing the internal structure design of the motor, while also simplifying the internal structure of the motor. The present application also provides a powertrain and an electric vehicle. The present application specifically includes the following technical solutions:

[0004] In a first aspect, the present application provides a motor with non-uniformly arranged oil guide ring through holes, the motor comprising a housing, a stator and an oil guide ring, the housing being provided with an oil discharge port, the oil discharge port being used to discharge the oil in the housing, the oil guide ring being arranged adjacent to the stator along the motor axis, the oil guide ring comprising a plurality of through holes, each through hole being used to transmit oil to cool the winding, each through hole penetrating the oil guide ring along the radial direction of the motor, the plurality of through holes comprising a plurality of first through holes and a plurality of second through holes, wherein, along the circumference of the motor, the plurality of first through holes are arranged in sequence at intervals, the plurality of second through holes are arranged in sequence at intervals, the spacing between any two adjacent first through holes is smaller than the spacing between any two adjacent second through holes, and the spacing between each first through hole and the oil discharge port is larger than the spacing between each second through hole and the oil discharge port.

[0005] The oil guide ring of the motor of the present application is coaxially arranged on one side of the stator core along the axial direction of the motor, the stator winding is wound inside the core and at least partially extends out of the core along the axial direction of the stator, the oil guide ring is coaxially sleeved on the outside of the partial structure of the winding extending out of the core, the oil guide ring is provided with a plurality of through holes which are arranged at intervals and penetrate the oil guide ring along the radial direction of the motor, part of the oil can flow from the through holes to the partial structure of the winding extending out of the core, so as to achieve heat dissipation and cooling of the partial structure of the winding extending out of the core.

[0006] The multiple through holes of the oil guide ring of the motor of the present application are arranged unevenly, that is, the arrangement density of the first through holes with a relatively large spacing from the oil unloading port among the multiple through holes is greater than the arrangement density of the second through holes with a relatively small spacing from the oil unloading port among the multiple through holes, so that the through holes arranged on the side of the oil guide ring away from the oil unloading port are denser than the through holes arranged on the side of the oil guide ring toward the oil unloading port. Since the heat dissipation requirements of the part of the structure of the winding extending out of the iron core facing the oil unloading port are relatively low and the difficulty is relatively small, therefore, in accordance with the placement direction of the motor and the heat dissipation requirements of the part of the structure of the winding extending out of the iron core, the side of the outer peripheral surface of the oil guide ring with a relatively dense arrangement of through holes can be closer to the top along the gravity direction, so that the amount of oil transmitted from the oil guide ring away from the oil unloading port to the part of the structure of the winding extending out of the iron core is greater, thereby improving the heat dissipation and cooling effect of the oil guide ring at the position where the heat dissipation requirements of the winding are greater, and achieving the effect of uniform heat dissipation of the oil guide ring on the part of the structure of the winding extending out of the iron core. At the same time, the oil transferred from the oil guide ring to the outer peripheral surface of the winding flows on the outer peripheral surface of the winding under the action of gravity, which can increase the coverage area of ​​the winding covered by the oil, further improve the heat dissipation and cooling intensity of the winding by the oil, and improve the effect of the oil guide ring on the uniform heat dissipation of the partial structure of the winding extending out of the iron core. That is, the multiple through holes of the oil guide ring of the motor of the present application can uniformly dissipate heat for the partial structure of the winding extending out of the iron core, so as to reduce the temperature of the partial structure of the winding extending out of the iron core, thereby reducing the overall temperature of the motor when it is working, ensuring that the motor can have a good and appropriate working temperature when it is working, and improving the working performance and life of the motor.

[0007] In a possible implementation, a distance between any two adjacent first through holes is less than or equal to the first distance, and a distance between any two adjacent second through holes is less than or equal to the second distance and greater than the first distance.

[0008] In a possible implementation manner, the number of the plurality of first through holes is greater than the number of the plurality of second through holes, wherein the number of the second through holes is two.

[0009] In this implementation, since the spacing between the plurality of first through holes is smaller than the spacing between the plurality of second through holes, the number of first through holes arranged is greater than the number of second through holes arranged, which can further improve the arrangement density of the first through holes arranged on the outer peripheral surface of the oil guide ring away from the oil discharge port, which is greater than the arrangement density of the second through holes on the outer peripheral surface of the oil guide ring facing the oil discharge port, thereby ensuring that the oil discharge amount on the side of the oil guide ring away from the oil discharge port is greater, and can form a better and more stable heat dissipation and cooling effect on the partial structure of the winding extending out of the iron core. At the same time, since the spacing between the second through holes is greater than the spacing between the first through holes and the number of the second through holes is two, at this time, the spacing between the two second through holes is greater than the spacing between any other two adjacent through holes, so that the oil can be completely transported from the side of the oil guide ring away from the oil discharge port to the winding, further improving the heat dissipation and cooling intensity and effect of the oil guide ring on the winding at a position where the heat dissipation difficulty is relatively large, and improving the heat dissipation uniformity of the partial structure of the winding extending out of the iron core, so that the effect and efficiency of the oil on reducing the overall temperature of the winding are effectively improved.

[0010] In a possible implementation manner, the number of the plurality of first through holes is greater than the number of the plurality of second through holes, wherein the number of the second through holes is three.

[0011] In this implementation, among the three second through holes, the spacing between the second through hole arranged in the middle and the two second through holes adjacent to it is greater than the spacing between any other two adjacent first through holes. When the oil pump for providing oil is in working state, the oil can flow from the multiple first through holes and the three second through holes to the winding, so as to simultaneously dissipate heat and cool the side of the winding facing the oil discharge port. Under the action of gravity, the oil delivered to the winding through the oil guide ring flows downward along the outer peripheral surface of the winding and is stored in the lower area of ​​the inner peripheral surface of the oil guide ring. At this time, when the oil pump for providing oil is in a non-working state, the second through hole located in the middle of the three second through holes can unload the stored oil. That is, the oil stored in the oil guide ring can flow out of the oil guide ring from the second through hole arranged in the middle, so as to avoid the oil stored in the oil guide ring from being unable to flow out and be recycled, which leads to a reduction in the heat dissipation and cooling effect of the oil. At the same time, the second through hole arranged in the middle of the three second through holes unloads the oil in the oil guide ring, which can prevent excessive oil storage in the oil guide ring from affecting the working performance and life of other functional structures in the motor.

[0012] In a possible implementation, along the circumference of the motor, a distance between two through holes with the largest distance between them among the plurality of first through holes is greater than a distance between two through holes with the largest distance between them among the plurality of second through holes.

[0013] In this implementation, the center angle corresponding to the two first through holes with the largest spacing arranged along the circumference of the motor is greater than the center angle corresponding to the two second through holes with the largest spacing, which can ensure that the coverage area of ​​the oil delivered to the winding through the first through hole is greater than the coverage area of ​​the oil delivered to the winding through the second through hole. Since the first through hole is farther away from the oil discharge port than the second through hole, in conjunction with the placement direction of the motor and the heat dissipation requirements of the part of the structure of the winding extending out of the core, it can also be understood that the first through hole is closer to the upper area of ​​the winding than the second through hole, so it can improve the heat dissipation and cooling intensity and efficiency of the oil guide ring to the upper area of ​​the winding, and further improve the overall cooling efficiency of the winding.

[0014] In a possible implementation, the cross-sectional areas of the through holes are equal.

[0015] In this implementation, the cross-sectional areas of the through holes are set to be equal, which can reduce the difficulty and complexity of preparing the oil guide ring, thereby improving the production efficiency of the oil guide ring, and further improving the production efficiency of the motor.

[0016] In a possible implementation, the diameter of each through hole is between 1-5 mm.

[0017] In a possible implementation manner, along the circumference of the motor, the distance between any two adjacent first through holes among the plurality of first through holes is the same.

[0018] In this implementation, the spacing between any first through hole in the plurality of first through holes and its two adjacent first through holes is equal, so that the oil guide ring can achieve uniform heat dissipation for the positions of the winding corresponding to the plurality of first through holes. At the same time, the spacing between the plurality of first through holes is set uniformly, which can reduce the overall difficulty and complexity of the preparation of the oil guide ring, thereby improving the production efficiency of the oil guide ring, and further improving the production efficiency of the motor.

[0019] In a possible implementation manner, along the circumference of the motor, the intervals between any two adjacent second through holes among the plurality of second through holes are the same.

[0020] In this implementation, the spacings between the multiple second through holes are equal, and the oil guide ring can achieve uniform heat dissipation for the positions of the winding corresponding to the multiple second through holes. At the same time, the spacings between the multiple second through holes are set uniformly, which can reduce the overall difficulty and complexity of the preparation of the oil guide ring, thereby improving the production efficiency of the oil guide ring, and further improving the production efficiency of the motor.

[0021] In a possible implementation, along the circumference of the motor, the spacing between any two adjacent first through holes among the multiple first through holes is the same, and the cross-sectional areas of the multiple first through holes decrease successively along the direction from the center of the oil guide ring toward the geometric center of the oil unloading port.

[0022] In this implementation, since the cross-sectional area of ​​the through hole affects the amount of oil flowing out of each through hole, the amount of oil flowing out of the oil guide ring gradually decreases in the direction from the center of the oil guide ring toward the geometric center of the oil discharge port. When the spacing between the multiple first through holes is equal, the cross-sectional area of ​​the multiple first through holes gradually decreases, so that more oil flows from the side of the oil guide ring away from the oil discharge port to the part of the structure where the winding protrudes from the iron core, which can improve the heat dissipation intensity of the side of the winding away from the oil discharge port, so as to further improve the heat dissipation uniformity of the oil guide ring to the part of the structure where the winding protrudes from the iron core.

[0023] In a possible implementation, along the circumference of the motor, a distance between two adjacent first through holes among the plurality of first through holes increases sequentially in a clockwise direction.

[0024] In a possible implementation, along the circumference of the motor, a distance between two adjacent first through holes among the plurality of first through holes increases sequentially in a counterclockwise direction.

[0025] In a possible implementation, along the circumference of the motor, a distance between two adjacent first through holes among the plurality of first through holes increases sequentially in both a clockwise direction and a counterclockwise direction.

[0026] In the present implementation, the density of the through holes arranged on the outer peripheral surface of the oil guide ring gradually decreases along the direction from the center of the oil guide ring toward the geometric center of the oil unloading port, so that the amount of oil flowing from the oil guide ring to the winding gradually decreases along the direction from the center of the oil guide ring toward the geometric center of the oil unloading port, thereby making more oil flow from the side of the oil guide ring away from the oil unloading port to the part of the structure where the winding protrudes from the iron core, so as to enhance the heat dissipation intensity of the oil guide ring to the side of the winding away from the oil unloading port, and further enhance the heat dissipation uniformity of the oil guide ring to the part of the structure where the winding protrudes from the iron core.

[0027] In a possible implementation, the plurality of first through holes are arranged symmetrically with respect to a line connecting the center of the oil guide ring to the geometric center of the oil discharge port.

[0028] In this implementation, multiple first through holes are symmetrically arranged on the outer circumference of the oil guide ring, which can improve the uniformity of heat dissipation of the oil guide ring to the partial structure of the winding extending out of the iron core, and further improve the heat dissipation effect of the partial structure of the winding extending out of the iron core.

[0029] In a possible implementation, each through hole includes an opening toward the center of the oil guide ring, wherein: along the radial direction of the motor, the distance between the opening of at least one through hole toward the center of the oil guide ring and the center of the oil guide ring is greater than or equal to the radius of the inner circumference of the stator.

[0030] In this implementation, the inner circumference of the stator has a position closest to the oil unloading port along the direction from the center of the oil guide ring toward the geometric center of the oil unloading port, and the inner circumference of the stator passes through the tangent at the position closest to the oil unloading port to divide the oil guide ring into two parts. Since the oil is stored in the part of the two parts of the oil guide ring facing the oil unloading port, at least one through hole among the multiple through holes is arranged on the part of the oil guide ring facing the oil unloading port, so that the oil stored in the oil guide ring can flow out from at least one through hole, and then the oil unloading function of the oil guide ring can be realized, so as to facilitate the recycling of the oil and improve the heat dissipation and cooling effect of the oil on the functional structures inside the motor. At the same time, since the inner circumference of the stator passes through the tangent at the position closest to the oil unloading port to divide the oil guide ring into two parts, and at least one through hole is arranged on the part of the oil guide ring facing the oil unloading port, it can be ensured that there is a gap between the liquid level of the oil stored in the oil guide ring and the rotor of the motor, so as to avoid the stored oil immersing the rotor and reducing the working performance of the rotor.

[0031] In a possible implementation, along the axial direction of the motor, the length W of the winding extending out of the stator and the distance P between the axis of the through hole and the end surface of the oil guide ring facing the stator satisfy the condition: W / 3≤P≤2W / 3.

[0032] In this implementation, the axial through hole along the motor is located roughly in the middle of the partial structure of the winding extending out of the iron core relative to the partial structure of the winding extending out of the iron core, so that the oil flowing out of the through hole extends from the middle of the partial structure of the winding extending out of the iron core toward both ends when flowing toward the winding, thereby ensuring the heat dissipation effect of the oil guide ring on the overall partial structure of the winding extending out of the iron core.

[0033] In a possible implementation, along the radial direction of the motor, the distance between the outer circumferential surface of the oil guide ring and the outer circumferential surface of the stator is between 2-3 mm.

[0034] In this implementation, along the axial direction of the motor, the oil guide ring is held between the iron core and the housing, and along the radial direction of the motor, the outer diameter of the oil guide ring is smaller than the outer diameter of the stator. At this time, the oil guide ring is concave between the stator and the housing, so part of the oil on the outer circumference of the stator flows to the oil guide ring and gathers and is stored at the oil guide ring to ensure the flow of oil from the through hole of the oil guide ring toward the winding, thereby improving the heat dissipation and cooling effect of the oil on the winding. Along the radial direction of the motor, the difference between the radius of the outer circumference of the stator and the radius of the outer circumference of the oil guide ring is between 2-3mm, so as to avoid the difference between the two being too large, resulting in the increase of the path of part of the oil on the outer circumference of the stator flowing to the oil guide ring, thereby reducing the heat dissipation and cooling efficiency of the oil on the part of the structure of the winding extending out of the iron core. That is, along the radial direction of the motor, the difference between the radius of the outer circumferential surface of the stator and the radius of the outer circumferential surface of the oil guide ring is between 2-3mm. While ensuring the flow effect of the oil from the through hole toward the partial structure of the winding extending out of the iron core, it can also shorten the path of the oil flowing from the outer circumferential surface of the stator to the oil guide ring to improve the heat dissipation and cooling efficiency of the oil.

[0035] In a possible implementation, the winding includes a plurality of wires, the cross-sectional shape of the wires along the length direction of the wires is rectangular, and along the radial direction of the motor, the distance between the inner circumference of the oil guide ring and the outer side of the winding is between 1-3 cm.

[0036] In a possible implementation, the winding includes a plurality of wires, the cross-sectional shape of the wires along the length direction of the wires is circular, and along the radial direction of the motor, the distance between the inner circumference of the oil guide ring and the outer side of the winding is between 0.5-2 mm.

[0037] In one possible implementation, the housing includes an intermediate housing and a motor end cover, the intermediate housing is used to fix the stator of the motor, the motor end cover includes a bearing accommodating cavity, the bearing accommodating cavity is used to accommodate the motor bearing, the motor end cover includes an internal flow channel, the internal flow channel includes an inlet and an outlet, wherein the opening of the inlet faces the oil guide ring, and the distance between the radial inlet and the axis of the motor along the motor is greater than the distance between the outer peripheral surface of the oil guide ring and the axis of the motor; the opening of the outlet faces the motor bearing.

[0038] In this implementation, the intermediate housing and the motor end cover cooperate to form a motor housing chamber for accommodating the functional structural parts of the motor, and provide a protective effect on the motor to prevent external impurities, foreign objects, etc. from damaging the motor, thereby improving the working performance and life of the motor. The motor shaft of the motor passes through the motor end cover through the motor bearing hole, and the motor shaft extends out of the motor end cover to be connected to the external transmission member, so that the motor can output power to the outside through the motor shaft. Along the axial direction of the motor, the oil guide ring is supported between the iron core of the stator and the motor end cover to fix the oil guide ring and ensure the uniform heat dissipation and cooling effect of the oil guide ring on the part of the structure where the winding extends out of the iron core of the stator. The two ends of the internal flow channel face the oil guide ring and the motor bearing respectively, so that the internal flow channel can be connected between the oil guide ring and the motor bearing, and part of the oil delivered to the outer peripheral surface of the oil guide ring is divided at the oil guide ring, and at least part of the oil is delivered from the through hole of the oil guide ring to the part of the structure of the iron core of the stator where the winding extends out to dissipate heat and cool, and at least part of the oil is delivered to the internal flow channel and guided to the motor bearing through the internal flow channel to achieve lubrication and heat dissipation effects on the motor bearing. In other words, part of the oil is divided at the oil guide ring and delivered from the internal flow channel to the motor bearing, so that the motor bearing can achieve lubrication and heat dissipation cooling effects, thereby realizing the reuse of the oil guide ring to improve the utilization rate of the internal structure of the motor, avoiding the complex oil channel designed inside the motor to deliver oil to the motor bearing, simplifying the internal structure design of the motor and reducing the difficulty of motor production.

[0039] In a possible implementation manner, a ratio between a cross-sectional area of ​​the through hole and an opening cross-sectional area of ​​the inlet is greater than or equal to 0.5 and less than or equal to 2.

[0040] In this implementation, the size of the cross-sectional area of ​​the through hole relative to the opening cross-sectional area of ​​the inlet will affect the amount of oil on the outer peripheral surface of the oil guide ring that is transported to the through hole and the internal flow channel respectively. Among them, if the cross-sectional area of ​​the through hole is too large relative to the opening cross-sectional area of ​​the inlet, the oil on the outer peripheral surface of the oil guide ring may be diverted too much to the through hole, and the amount of oil diverted to the internal flow channel may be insufficient, thereby reducing the lubrication effect and heat dissipation cooling effect of the motor bearing. If the cross-sectional area of ​​the through hole is too small relative to the opening cross-sectional area of ​​the inlet, the oil on the outer peripheral surface of the oil guide ring may be diverted too much to the internal flow channel, and the amount of oil diverted to the through hole may be insufficient, thereby reducing the heat dissipation cooling effect of the oil guide ring on the part of the structure where the winding protrudes from the core. That is, the ratio between the cross-sectional area of ​​the limited through hole and the opening cross-sectional area of ​​the inlet is greater than or equal to 0.5 and less than or equal to 2, which can ensure the heat dissipation and cooling effect of the oil guide ring on the part of the winding extending out of the core, while also ensuring that sufficient oil is diverted to the internal flow channel to provide good lubrication and heat dissipation cooling effects on the motor bearings.

[0041] In a possible implementation, the distance between the axis of the axial through hole of the motor and the inlet is less than or equal to 2 cm.

[0042] In a possible implementation, gaps are provided between the intermediate housing and the outer circumferential surface of the stator and the outer circumferential surface of the oil guide ring. The outer circumferential surface of the oil guide ring includes a plurality of drainage slopes, each of which is used to guide the oil flowing out of the gap into one or more first through holes.

[0043] In this implementation, the drainage slope is concave on the outer circumference of the oil guide ring, and part of the oil flowing out of the gap flows into the oil guide ring and flows into the multiple drainage slopes arranged on the outer circumference of the oil guide ring. The oil flows to the through hole through the drainage slope, which can improve the speed and effect of the oil flowing to the through hole, thereby improving the heat dissipation and cooling efficiency of the oil on the end of the winding extending out of the iron core. The drainage slope is arranged on the outer circumference of the oil guide ring, so that the drainage slope is constructed as an annular groove structure, so that the oil can flow along the bottom of the groove and flow to the multiple through holes arranged at intervals, thereby ensuring that the multiple through holes of the oil guide ring can continuously and stably flow with oil, so as to improve the heat dissipation and cooling stability of the part of the structure extending out of the iron core of the winding.

[0044] In a possible implementation, the outer circumferential surface of the oil guide ring includes a plurality of radial protrusions or a plurality of radial grooves, wherein each radial protrusion extends in a direction away from the center of the oil guide ring along the radial direction of the motor, and the distance between one end of each radial protrusion away from the center of the oil guide ring and the center of the oil guide ring is greater than the radius of the outer circumferential surface of the stator; each radial groove is recessed in a direction toward the center of the oil guide ring along the radial direction of the motor, and the distance between the bottom of each radial groove and the center of the oil guide ring is less than the radius of the outer circumferential surface of the stator.

[0045] In the present implementation, the radial protrusion protrudes from the outer circumferential surface of the oil guide ring to extend into the shell, or the protrusion of the shell extends into the radial groove, both of which can achieve the effect of limiting the rotation of the oil guide ring around the stator axis relative to the shell, so that the oil guide ring cooperates with the placement direction of the motor, and always keeps the distance between the second through hole and the oil unloading port smaller than the distance between the first through hole and the oil unloading port, so that the amount of oil delivered to the upper area of ​​the winding through the oil guide ring is always greater than the amount of oil delivered to the lower area of ​​the winding, thereby improving the uniform heat dissipation effect of the oil guide ring on the partial structure of the winding extending out of the iron core, and further improving the heat dissipation effect and heat dissipation stability of the motor.

[0046] In a possible implementation, the outer peripheral surface of the oil guide ring includes multiple rows of through holes, each row of through holes includes multiple first through holes and multiple second through holes, and the multiple rows of through holes are arranged at intervals along the axial direction of the motor.

[0047] In this implementation, multiple rows of through holes are arranged at intervals along the axial direction of the motor, and the multiple rows of through holes correspond to different positions of the partial structure of the winding extending out of the iron core, which can increase the coverage area of ​​the winding by the oil transported to the winding through the oil guide ring, and further improve the heat dissipation and cooling effect and efficiency of the partial structure of the winding extending out of the iron core.

[0048] On the second aspect, the present application also provides a power assembly, which is used to receive power from a power battery of an electric vehicle and to drive the wheels of the electric vehicle. The power assembly includes a reducer and a motor as in any of the above-mentioned implementation methods. The motor is connected to the wheels through the reducer transmission, and the power assembly is fixedly connected to the body of the electric vehicle, wherein the motor is fixed in the power assembly of the vehicle body, and the oil unloading port of the shell in the motor is located at the bottom of the shell in the vertical direction, and the line connecting the center of the oil guide ring and the geometric center of the oil unloading port coincides in the vertical direction.

[0049] The powertrain provided in the present application is powered by the power battery of the electric vehicle to work, and the powertrain drives the wheels of the electric vehicle to rotate to realize the function of vehicle driving. The motor is connected to the wheel through the reducer transmission, so that the motor can output power to the reducer and transmit the power to the wheel end through the reducer to drive the wheel to rotate. The oil discharge port is arranged at the bottom of the shell in the vertical direction, and the oil contained in the functional structural parts in the shell can be collected by gravity. There is no need to design a device or structure for collecting the used oil separately, so as to simplify the structural design of the motor shell and reduce the overall energy consumption of the powertrain. At the same time, the used oil in the shell flows to the oil discharge port under the action of gravity and flows out of the shell from the oil discharge port, which can realize the recycling of the oil, while ensuring the lubrication or heat dissipation cooling effect of the oil on the functional structural parts in the shell, and reducing the use cost of the powertrain. A plurality of first through holes are arranged on the outer peripheral surface of the oil guide ring away from the oil discharge port in the vertical direction, and the oil is transported from the plurality of first through holes to the winding for heat dissipation and cooling. The oil flows from the upper area of ​​the partial structure of the winding extending out of the iron core to the winding in the vertical direction. Since the partial structure of the winding extending out of the iron core is annular in structure as a whole, the oil will flow downward along the outer circumference of the partial structure of the winding extending out of the iron core under the action of gravity, thereby achieving the effect of heat dissipation and cooling the lower part of the partial structure of the winding extending out of the iron core.

[0050] The powertrain is equipped with a motor in any of the above implementations. Since the motor in any of the above implementations uses the non-uniformly arranged through holes on the oil guide ring to evenly dissipate heat and cool the portion of the winding extending out of the iron core, the overall heat dissipation effect of the powertrain can be improved. That is, because the motor in any of the above implementations is used, the powertrain of the present application has all the possible beneficial effects of the motor provided by any of the above implementations.

[0051] In a possible implementation, the gear set of the reducer in the powertrain is accommodated in the housing of the motor.

[0052] In this implementation, the gear set of the reducer and the motor are housed in the same housing, which can simplify the overall structural design of the powertrain and reduce the difficulty of manufacturing the powertrain.

[0053] In a third aspect, the present application also provides an electric vehicle, comprising wheels, a power battery and a powertrain in any of the above-mentioned implementations, wherein the powertrain is used to receive power from the power battery and to drive the wheels.

[0054] The powertrain of the electric vehicle provided in the present application is connected to the wheel transmission, so that the power output by the motor is transmitted to the reducer, and then transmitted to the wheels through the reducer, so as to achieve the effect of driving the wheels to rotate and thus drive the electric vehicle to travel.

[0055] The electric vehicle of the present application is equipped with the powertrain in any of the above implementations, which can improve the working performance and life of the electric vehicle of the present application. That is, because the powertrain in any of the above implementations is used, the electric vehicle of the present application has all the possible beneficial effects of the powertrain provided by any of the above implementations. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the implementation manner will be briefly introduced below. Obviously, the drawings described below are only some implementation manners of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0057] Figure 1 A schematic diagram of a working scenario of a powertrain provided in an embodiment of the present application;

[0058] Figure 2 A schematic diagram of the appearance structure of the powertrain provided in an embodiment of the present application;

[0059] Figure 3 A schematic diagram of the appearance structure of a motor provided in an embodiment of the present application;

[0060] Figure 4 A schematic diagram of the cross-sectional structure of a motor provided in an embodiment of the present application;

[0061] Figure 5 A schematic diagram of the appearance structure of the powertrain provided in an embodiment of the present application;

[0062] Figure 6 A schematic diagram of the appearance structure of a motor of a power assembly provided in an embodiment of the present application;

[0063] Figure 7 A schematic diagram of the cross-sectional structure of a motor provided in an embodiment of the present application;

[0064] Figure 8 A schematic diagram of a partially enlarged structure of a motor at position A provided in an embodiment of the present application;

[0065] Fig. 9 A schematic diagram of the appearance structure of the oil guide ring of the motor provided in an embodiment of the present application;

[0066] Fig.10 A schematic diagram of a partial cross-sectional structure of a motor provided in an embodiment of the present application;

[0067] Fig.11 A schematic cross-sectional structure diagram of an oil guide ring of a motor provided in an embodiment of the present application;

[0068] Fig.12A schematic cross-sectional structure diagram of an oil guide ring of a motor provided in an embodiment of the present application;

[0069] Fig.13 A schematic cross-sectional structure diagram of an oil guide ring of a motor provided in an embodiment of the present application;

[0070] Fig.14 A schematic diagram of a partial cross-sectional structure of an oil guide ring of a motor provided in an embodiment of the present application;

[0071] Fig.15 A schematic diagram of the planar structure of a motor provided in an embodiment of the present application;

[0072] Fig.16 A schematic diagram of the appearance structure of the oil guide ring of the motor provided in an embodiment of the present application;

[0073] Fig.17 A schematic diagram of the appearance structure of the oil guide ring of the motor provided in an embodiment of the present application;

[0074] Fig.18 A schematic diagram of a partial appearance structure of an oil guide ring of a motor provided in an embodiment of the present application;

[0075] Fig.19 A schematic diagram of a partial cross-sectional structure of a motor provided in an embodiment of the present application;

[0076] Fig. 20 A schematic diagram of the cross-sectional structure of a motor provided in an embodiment of the present application;

[0077] Fig.21 A schematic diagram of a partial cross-sectional structure of a motor provided in an embodiment of the present application;

[0078] Fig. 22 A schematic diagram of the internal oil circuit structure of the powertrain provided in an embodiment of the present application. DETAILED DESCRIPTION

[0079] The technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection claimed in the present application.

[0080] The present application provides a motor with non-uniform arrangement of oil guide ring through holes, the motor includes a housing, a stator and an oil guide ring, the housing is provided with an oil discharge port, the oil discharge port is used to discharge the oil in the housing, the oil guide ring is arranged adjacent to the stator along the motor axis, the oil guide ring includes a plurality of through holes, each through hole is used to transmit oil to cool the winding, each through hole penetrates the oil guide ring along the radial direction of the motor, the plurality of through holes include a plurality of first through holes and a plurality of second through holes, wherein, along the circumference of the motor, the plurality of first through holes are arranged in sequence, the plurality of second through holes are arranged in sequence, the spacing between any two adjacent first through holes is smaller than the spacing between any two adjacent second through holes, and the spacing between each first through hole and the oil discharge port is larger than the spacing between each second through hole and the oil discharge port. The motor with non-uniform arrangement of oil guide ring through holes provided in the present application can evenly dissipate heat from the partial structure of the winding extending out of the core through the non-uniformly arranged multiple through holes, so as to reduce the temperature of the partial structure of the winding extending out of the core, thereby reducing the overall temperature of the motor when it is working, ensuring that the motor can have a good and suitable working temperature when it is working, and improving the working performance and life of the motor.

[0081] The present application provides a powertrain, which is used to receive power from a power battery of an electric vehicle and to drive the wheels of the electric vehicle. The powertrain includes a reducer and a motor as described in the above implementation method. The motor is connected to the wheels through the reducer transmission, and the powertrain is fixedly connected to the body of the electric vehicle, wherein the motor is fixed in the powertrain of the body, the oil discharge port of the housing in the motor is located at the bottom of the housing along the vertical direction, and the line connecting the center of the oil guide ring and the geometric center of the oil discharge port coincides with the vertical direction. The powertrain of the present application utilizes the motor to output power, which can improve the working performance and life of the powertrain.

[0082] The present application provides an electric vehicle, including wheels, a power battery and a powertrain in the above implementation, the powertrain is used to receive power from the power battery and to drive the wheels. The electric vehicle of the present application uses the powertrain to drive the wheels to rotate, so that the electric vehicle has better working performance and life.

[0083] The present application provides an electric vehicle, which includes wheels, a power battery and a power assembly 1000. The power battery is electrically connected to various functional structural components inside the electric vehicle to provide power for normal operation of the various functional structural components inside the electric vehicle. The power assembly 1000 is used to receive the electrical energy provided by the power battery and to drive the wheels of the electric vehicle.

[0084] Specifically, the wheels are rotatably connected to the body of the electric vehicle, and the wheels rotate to drive the frame of the electric vehicle to travel. The power assembly 1000 is fixedly connected to the body of the electric vehicle and is in transmission connection with the wheels of the electric vehicle. Exemplarily, the power battery supplies power to the power assembly 1000, and the power assembly 1000 receives electrical energy and outputs power to the wheel end to drive the wheel to rotate.

[0085] See also Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of a working scenario of the powertrain 1000 provided in an embodiment of the present application. Figure 2 The schematic diagram of the appearance structure of the power assembly 1000 provided in the embodiment of the present application. The power assembly 1000 includes a motor 100 and a reducer 101 , wherein the motor 100 is fixed in the power assembly 1000 of the vehicle body and is in driving connection with the reducer 101 .

[0086] Specifically, the motor shaft of the motor 100 (at Figure 3 The motor shaft 30 is shown as a transmission connection to the input shaft of the reducer 101. The motor 100 is used to generate driving torque and is used as a power source of the power assembly 1000 to output power. The motor 100 transmits the output power to the wheels through the reducer 101 to drive the electric vehicle to travel.

[0087] Exemplarily, the reducer 101 includes a gear set 1011 and a plurality of rotating shafts 1012. The gear set 1011 includes a plurality of gears 1011a. At least one gear 1011a is coaxially sleeved on the periphery of each rotating shaft 1012. The gears 1011a mesh with each other to achieve transmission connection between the plurality of rotating shafts 1012.

[0088] At least one rotating shaft 1012 in the reducer 101 serves as a power input shaft 1012a (abbreviated as input shaft 1012a) of the reducer 101 and rotates coaxially with the motor shaft 30 of the motor 100, so as to achieve transmission connection with the motor shaft 30 of the motor 100. The motor shaft 30 rotates around its own axis and drives the input shaft 1012a to rotate around its own axis, so as to input the power output by the motor 100 into the reducer 101. At least one rotating shaft 1012 in the reducer 101 serves as a power output shaft of the reducer 101 and rotates coaxially with the wheel, so as to transmit the power input by the power input shaft out of the reducer 101 and to the wheel end, thereby driving the wheel to rotate.

[0089] It should be noted that the embodiment of the present application is only illustrative of a possible implementation method in which the reducer 101 transmits the power output by the motor 100 to the wheels, but the method of transmitting power by the reducer 101 is not limited to this.

[0090] At the same time, Figure 1In the illustrated embodiment, only the possible functional structures in the powertrain 1000 provided in the embodiment of the present application and the possible structural shapes, sizes, and arrangement positions of each functional structure are used as examples for exemplary introduction, but the functional structural devices in the powertrain 1000 provided in the embodiment of the present application and the structural shapes, sizes, and arrangement positions of each functional structural device are not limited to this. In other embodiments of the present application, the functional structural devices in the powertrain 1000 and the structural shapes, sizes, and arrangement positions of each functional structural device can be adjusted according to actual design requirements and application scenarios, and the embodiment of the present application does not specifically limit this.

[0091] Please combine Figure 2 See also Figure 3 and Figure 4 , Figure 3 This is a schematic diagram of the appearance structure of the motor 100 provided in the embodiment of the present application. Figure 4 1 is a schematic cross-sectional view of the motor 100 provided in the embodiment of the present application. In order to clearly illustrate the structure of the stator 10, the rotor 20 and the motor shaft 30 in the motor 100, Figure 3 In the illustrated embodiment, structures such as the housing and bearings of the motor 100 are hidden. The motor 100 includes a stator 10, a rotor 20, and a motor shaft 30. The rotor 20 and the stator 10 are coaxially sleeved on the periphery of the motor shaft 30 in sequence. The motor shaft 30 is fixedly connected to the rotor 20. The rotor 20 rotates around its own axis and synchronously drives the motor shaft 30 to rotate, so as to output power to the outside through the motor shaft 30.

[0092] Exemplarily, the stator 10 includes an iron core 11 and a winding 12. The winding 12 is composed of a plurality of conductive wires and is wound inside the iron core 11, and the winding 12 has at least a portion of the structure extending out of the iron core 11 along the axial direction of the motor 100. In this application specification, the portion of the structure that indicates the winding 12 extending out of the iron core 11 along the axial direction of the motor 100 is the winding end 121.

[0093] It can be understood that when an alternating current is passed through the winding 12, a rotating stator magnetic field is generated in the iron core 11, and the rotating stator magnetic field can drive the rotor 20 to rotate around the axial direction of the stator 10. The rotor 20 rotates and synchronously drives the motor shaft 30 to rotate coaxially, thereby realizing the function of the motor 100 outputting power to the outside.

[0094] The motor 100 includes a housing 40, and the stator 10 of the motor 100 is fixed in the housing 40, so that the motor 100 is fixed relative to the housing 40. Specifically, the housing 40 includes an intermediate housing 45, and the intermediate housing 45 has a motor receiving chamber 41 with an annular structure. The stator 10, the rotor 20 and at least part of the motor shaft 30 of the motor 100 are all received in the motor receiving chamber 41 of the intermediate housing 45, and the intermediate housing 45 can support and fix the stator 10 and the rotor 20 of the motor 100.

[0095] exist Figure 2-Figure 4 In the illustrated embodiment, the intermediate shell 45 of the motor 100 encloses and forms a motor receiving cavity 41, the motor 100 is received in the motor receiving cavity 41, and the stator 10 of the motor 100 is fixedly connected to the inner wall of the motor receiving cavity 41, so as to achieve the effect that the motor 100 is received in the shell 40 and fixed relative to the shell 40.

[0096] It can be understood that the stator 10 is fixed in the housing 40 so that the motor 100 is fixed relative to the housing 40, and the housing 40 can support and fix the motor 100, so that the various functional structures inside the motor 100 can work normally to ensure the effect of the motor 100 outputting power outward. At the same time, the motor receiving cavity 41 can support and protect the stator 10 of the motor 100 to prevent external dust, foreign matter or other impurities from invading the interior of the motor 100 and possibly damaging the various functional structural parts inside the motor 100.

[0097] In one embodiment, the housing 40 of the motor 100 is also used to accommodate the gear set 1011 of the reducer 101. Figure 2 In the illustrated embodiment, the housing 40 of the motor 100 is further provided with a reducer receiving chamber 42, which is used to support and fix the reducer 101 to ensure that the functional components in the reducer 101 can work normally. At the same time, the reducer receiving chamber 42 is also used to protect the functional components in the reducer 101 to prevent external dust, foreign matter or other impurities from invading the interior of the reducer 101 and possibly damaging the functional components in the reducer 101.

[0098] The reducer housing chamber 42 is connected to the motor housing chamber 41 , so that the motor shaft 30 can be fixed to the input shaft 1012a of the reducer 101 , and the motor shaft 30 can drive the input shaft 1012a of the reducer 101 to rotate, so as to achieve the effect of transmitting power from the motor 100 to the reducer 101 .

[0099] In other words, the intermediate shell 45 that encloses the motor housing chamber 41 and the shell that encloses the reducer housing chamber 42 are constructed as an integrated structure, that is, the shell 40 of the motor 100 is constructed as an integrated shell, which is used to accommodate functional structural parts such as the gear set 1011 of the reducer 101 while accommodating and fixing the motor 100.

[0100] exist Figure 2 In the illustrated embodiment, the housing 40 of the motor 100 can also be understood as the housing of the power assembly 1000. In this case, the motor 100 and the reducer 101 are both accommodated in the housing of the power assembly 1000, which is illustrated as the housing 40 of the motor 100 in this application specification.

[0101] It can be understood that by accommodating the gear set 1011 of the reducer 101 in the housing 40 of the motor 100, the overall structural design of the powertrain 1000 can be simplified to reduce the difficulty of the process manufacturing of the powertrain 1000, and the overall miniaturization design of the powertrain 1000 can be achieved.

[0102] In one embodiment, the powertrain 1000 further includes a controller (not shown in the figure), and the housing 40 of the motor 100 can also be used to accommodate the controller of the motor 100. The controller can be used to receive external direct current and output alternating current to the motor 100. After the motor 100 receives the alternating current output by the controller, it can drive the motor shaft 30 to rotate and synchronously drive the input shaft of the reducer 101 to rotate, so as to deliver power to the reducer 101, and transmit the power output by the motor 100 to the wheels through the reducer 101.

[0103] It should be noted that in Figure 2 In the illustrated embodiment, only one possible embodiment of the housing 40 of the motor 100 is used as an example for exemplary description, but the structural shape and structural dimensions of the housing 40 of the motor 100 provided in the embodiment of the present application are not limited to this. In other embodiments of the present application, the structural shape and structural dimensions of the housing 40 of the motor 100 can also be adjusted according to actual design requirements and actual application scenarios of the powertrain 1000, and the embodiment of the present application does not specifically limit this.

[0104] For example, in a possible embodiment, the housing 40 of the motor 100 , the housing of the reducer 101 , and the housing of the controller may be separately provided.

[0105] For example, in a possible embodiment, any two of the housing 40 of the motor 100, the housing of the reducer 101, and the housing of the controller can be constructed as an integral whole, or all three can be constructed as an integral structure to form an integrated type, thereby further improving the miniaturized design effect of the powertrain 1000.

[0106] Please also read Figure 5-Figure 8 , Figure 5 This is a schematic diagram of the appearance structure of the power assembly 1000 provided in an embodiment of the present application. Figure 6 This is a schematic diagram of the appearance structure of the motor 100 of the power assembly 1000 provided in an embodiment of the present application. Figure 7 Schematic diagram of the cross-sectional structure of the motor 100 provided in the embodiment of the present application, Figure 8 This is a partial enlarged structural diagram of the motor 100 provided in the embodiment of the present application at position A. In order to clearly understand the structural features of the stator 10 and the oil guide ring 70 of the motor 100, Figure 5-Figure 7 The housing 40 and other possible functional components of the motor 100 are hidden.

[0107] like Figure 5-Figure 8 As shown, a gap is provided between the intermediate housing 45 and the outer circumferential surface of the stator 10. Exemplarily, a gap 111 is provided between the inner circumferential surface of the intermediate housing 45 and the outer circumferential surface of the iron core 11, and oil can flow in the gap 111 to dissipate heat and cool the iron core 11. Multiple gaps 111 are arranged at intervals along the circumference of the motor 100, and multiple gaps 111 along the axial direction of the motor 100 all penetrate the iron core 11, so as to increase the coverage area of ​​the oil and thus improve the heat dissipation and cooling efficiency of the iron core 11.

[0108] The oil flowing in the gap 111 may be supplied by, but is not limited to, an external oil pump (in Fig. 22 The oil pump 1003 is shown in the figure as pressurized oil provided so that when the oil cools the motor 100 , the oil can flow into each gap 111 on the core 11 to ensure the heat dissipation and cooling effect at each position of the core 11 .

[0109] exist Figure 5-Figure 8 In the illustrated embodiment, a plurality of grooves are formed on the outer circumferential surface of the iron core 11 of the motor 100, and the grooves are configured as gaps 111 between the housing 40 and the iron core 11. The plurality of grooves are arranged at intervals along the circumference of the motor 100, and along the axial direction of the motor 100, the plurality of grooves penetrate the opposite ends of the iron core 11.

[0110] When the oil circulates in the groove, it can achieve the effect of heat dissipation and cooling of the iron core 11 , thereby reducing the operating temperature of the motor 100 to improve the working performance and life of the motor 100 .

[0111] It should be noted that in Figure 5-Figure 8In the illustrated embodiment, only one possible structural shape, size, and arrangement of the groove is used as an example for exemplary introduction, but the structural features of the groove in the embodiment of the present application are not limited to this. In other embodiments of the present application, the structural shape, size, and arrangement of the gap 111 between the housing 40 and the core 11 can be adjusted according to the actual design requirements, application scenarios, or functional requirements that need to be met of the motor 100, and the embodiment of the present application does not specifically limit this.

[0112] The motor 100 includes an oil guide ring 70, which is arranged adjacent to the stator 10. Figure 5-Figure 8 In the embodiment shown, the oil guide ring 70 is coaxial with and adjacent to the iron core 11 of the stator 10, and the oil guide ring 70 is sleeved on the outside of the winding 12 of the stator 10. That is, the oil guide ring 70 is coaxially arranged on one side of the iron core 11 along the axis of the motor 100, and the end surface of the oil guide ring 70 facing the iron core 11 along the axis of the motor 100 is in contact with the end surface of the iron core 11 facing the oil guide ring 70, so that the oil guide ring 70 can be held against one side of the iron core 11. Figure 7 As shown, the oil guide ring 70 is coaxially sleeved on the outer side of the winding end 121 .

[0113] It can be understood that since the gap 111 penetrates the iron core 11 along the axial direction of the motor 100 and the oil guide ring 70 is abutted against and fits against the iron core 11, part of the oil can flow out of the iron core 11 from the port of the gap 111 and flow into the oil guide ring 70, so as to achieve the effect of guiding part of the oil in the gap 111 to the oil guide ring 70.

[0114] In one embodiment, a gap may be provided between the intermediate housing 45 and the outer circumferential surface of the oil guide ring 70 to transport oil to the outer circumferential surface of the oil guide ring 70 .

[0115] It should be noted that in Figure 5-Figure 7 In the illustrated embodiment, only one possible embodiment of delivering oil to the outer peripheral surface of the oil guide ring 70 is used as an example for illustrative description, but the implementation method of delivering oil to the outer peripheral surface of the oil guide ring 70 in the embodiment of the present application is not limited to this. In other embodiments of the present application, it is also possible but not limited to using other oil circuits to directly deliver oil to the outer peripheral surface of the oil guide ring 70, and the present application does not make specific limitations on this.

[0116] For example, the oil guide ring 70 is provided with a plurality of through holes 71 along the circumference of the motor 100, each through hole 71 is used to transmit oil to cool the winding 12, and each through hole 71 penetrates the oil guide ring 70 along the radial direction of the motor 100. Figure 5-Figure 7 In the illustrated embodiment, the plurality of through holes 71 are arranged at intervals, and the plurality of through holes 71 all penetrate the oil guide ring 70 in the radial direction of the motor 100 . The plurality of through holes 71 are used to guide a portion of the oil flowing out of the gap 111 to the winding 12 .

[0117] It is understandable that since the winding 12 is constructed of multiple wires, it will generate a lot of heat after current is passed through it. Since the winding end 121 is far away from the iron core 11 in the axial direction of the stator 10, the heat conduction effect of the winding end 121 to the iron core 11 is poor, resulting in the winding end 121 becoming a bottleneck for reducing the temperature of the motor 100. The motor 100 provided in the embodiment of the present application is provided with a plurality of through holes 71 arranged at intervals and penetrating through the oil guide ring 70, so that part of the oil in the gap 111 can flow from the through hole 71 to the winding end 121, thereby achieving the effect of heat dissipation and cooling of the winding end 121.

[0118] That is, the motor 100 provided in the embodiment of the present application can guide part of the oil in the gap 111 to the winding end 121 by holding the oil guide ring 70 against one side of the iron core 11. Since the winding end 121 is cooled and dissipated to reduce the temperature of the winding end 121, the overall operating temperature of the motor 100 is reduced and the operating performance and life are improved.

[0119] In one embodiment, the diameter of each through hole 71 is between 1-5 mm.

[0120] In one embodiment, the cross-sectional areas of the through holes 71 are equal. It is understandable that setting the cross-sectional areas of the through holes 71 to be equal can reduce the difficulty and complexity of preparing the oil guide ring 70, thereby improving the production efficiency of the oil guide ring 70, and further improving the production efficiency of the motor 100.

[0121] In one embodiment, the housing 40 is provided with an oil discharge port (at Fig.10 The oil discharge port 43 is shown in the figure, and the oil discharge port 43 is used to discharge the oil in the housing 40.

[0122] In one embodiment, the oil discharge port 43 of the housing 40 is located at the bottom of the housing 40 in the vertical direction. For example, when the motor 100 is fixed in the power assembly 1000, and the power assembly 1000 is fixed on the electric vehicle, the oil discharge port 43 is located at the bottom of the housing 40 in the vertical direction.

[0123] It can be understood that in accordance with the placement direction of the motor 100, the oil discharge port 43 is arranged at the bottom of the shell 40 in the vertical direction, so that gravity can be used to collect the oil inside the functional structural parts contained in the shell 40. There is no need to separately design a device or structure for collecting used oil, so as to simplify the structural design inside the shell 40 of the motor 100 and reduce the overall energy consumption of the powertrain 1000.

[0124] At the same time, the used oil in the shell 40 flows to the oil unloading port 43 under the action of gravity and flows out of the shell 40 from the oil unloading port 43, which can realize the recycling of the oil. While ensuring the lubrication or heat dissipation cooling effect of the oil on the various functional structural parts in the shell 40, the use cost of the power assembly 1000 is reduced.

[0125] In one embodiment, the center of the oil guide ring 70 and the line connecting the geometric center of the oil discharge port 43 coincide in the vertical direction. Since the winding end 121 is annular in structure as a whole, the oil will flow downward along the outer circumference of the winding end 121 under the action of gravity, which can enhance the effect of heat dissipation and cooling of the lower part of the winding end 121.

[0126] In one embodiment, two opposite ends of the iron core 11 along the axial direction of the motor 100 respectively have a partial structure where the winding 12 extends out of the iron core 11, wherein the number of the oil guide rings 70 is two. The two oil guide rings 70 are arranged on two opposite sides of the iron core 11 along the axial direction of the motor 100, and are coaxially sleeved outside the partial structure where the winding 12 extends out of the iron core 11.

[0127] That is, in Figure 5-Figure 7 In the illustrated embodiment, there are two winding ends 121, which are arranged on opposite sides of the iron core 11 along the axial direction of the motor 100. The two winding ends 121 correspond to the two oil guide rings 70 one by one, and each oil guide ring 70 is used to guide part of the oil in the gap 111 to the corresponding winding end 121, so as to dissipate heat and cool the winding end 121.

[0128] It should be noted that in Figure 5-Figure 7 In the illustrated embodiment, only two oil guide rings 70 are used as an example for illustrative description, but the number of oil guide rings 70 provided in the embodiment of the present application is not limited to two. In other embodiments of the present application, the number and position of the oil guide rings 70 can be adjusted according to actual design requirements, and the embodiment of the present application does not specifically limit this.

[0129] In the present specification, any oil guide ring 70 is taken as an example to exemplarily introduce the oil guide ring 70 .

[0130] See also Fig. 9 and Fig.10 , Fig. 9 This is a schematic diagram of the appearance structure of the oil guide ring 70 of the motor 100 provided in an embodiment of the present application. Fig.10 Schematic diagram of a partial cross-sectional structure of the motor 100 provided in the embodiment of the present application. In order to clearly illustrate the relative positional relationship between the oil guide ring 70 and the oil discharge port 43 of the housing 40, Fig.10 Partial functional structures of the motor 100 , such as the stator 10 , the rotor 20 , and part of the housing 40 , are omitted.

[0131] The plurality of through holes 71 include a plurality of first through holes 71a and a plurality of second through holes 71b. The plurality of first through holes 71a are arranged in sequence and spaced apart along the circumference of the motor 100, and the plurality of second through holes 71b are arranged in sequence and spaced apart. The spacing between any two adjacent first through holes 71a is smaller than the spacing between any two adjacent second through holes 71b, and the spacing between each first through hole 71a and the oil discharge port 43 is larger than the spacing between each second through hole 71b and the oil discharge port 43.

[0132] That is, the plurality of first through holes 71a are arranged on the outer peripheral surface of the oil guide ring 70 away from the oil unloading port 43, and the plurality of second through holes 71b are arranged on the outer peripheral surface of the oil guide ring 70 toward the oil unloading port 43. The arrangement density of the first through holes 71a with a relatively large spacing from the oil unloading port 43 among the plurality of through holes 71 is greater than the arrangement density of the second through holes 71b with a relatively small spacing from the oil unloading port 43 among the plurality of through holes 71, so that the through holes 71 arranged on the side of the oil guide ring 70 away from the oil unloading port 43 are denser than the through holes arranged on the side of the oil guide ring 70 toward the oil unloading port 43.

[0133] For example, along the circumferential direction of the motor 100, the number of the first through holes 71a arranged on the outer circumferential surface of the oil guide ring 70 away from the oil unloading port 43 is greater than the number of the second through holes 71b arranged on the outer circumferential surface of the oil guide ring 70 toward the oil unloading port 43. Along the direction from the center of the circle of the oil guide ring 70 toward the geometric center of the oil unloading port 43, the plurality of first through holes 71a are all located on the same side of the plurality of second through holes 71b, and the plurality of first through holes 71a are farther away from the oil unloading port 43 than the plurality of second through holes 71b.

[0134] It can be understood that since the spacing between the multiple first through holes 71a is smaller than the spacing between the multiple second through holes 71b, the number of arranged first through holes 71a is greater than the number of arranged second through holes 71b, which can further increase the arrangement density of the first through holes 71a arranged on the outer peripheral surface of the oil guide ring 70 away from the oil unloading port 43, compared with the arrangement density of the second through holes 71b on the outer peripheral surface of the oil guide ring 70 facing the oil unloading port 43, thereby ensuring that the oil output on the side of the oil guide ring 70 away from the oil unloading port 43 is greater, and can form a better and more stable heat dissipation and cooling effect on the partial structure of the winding 12 extending out of the iron core 11.

[0135] Exemplarily, the spacing between the multiple first through holes 71a arranged on the outer circumferential surface of the oil guide ring 70 away from the oil unloading port 43 is smaller than the spacing between the multiple second through holes 71b arranged on the outer circumferential surface of the oil guide ring 70 toward the oil unloading port 43, so as to respectively form a plurality of first through holes 71a with relatively small spacing and a plurality of second through holes 71b with relatively large spacing.

[0136] It should be noted that, in the specification of the present application, for the convenience of description and clear illustration, the plurality of through holes 71 with relatively small spacing are indicated as first through holes 71a, and the plurality of through holes 71 with relatively large spacing are indicated as second through holes 71b. In other words, the distinction and illustration between the plurality of first through holes 71a with relatively small spacing and the plurality of second through holes 71b with relatively large spacing is only to distinguish the difference in relative sizes of the spacing between the plurality of through holes 71, but does not limit the difference in structural shape, size and other features between the first through holes 71a and the second through holes 71b. That is, the structural shape, size and other features of the plurality of first through holes 71a and the plurality of second through holes 71b can be adjusted according to actual design requirements or at different positions on the oil guide ring 70, and the present application does not make specific limitations on this.

[0137] In one embodiment, the distance between any two adjacent first through holes 71 a is less than or equal to the first distance, and the distance between any two adjacent second through holes 71 b is less than or equal to the second distance and greater than the first distance.

[0138] In other words, the spacing between the plurality of first through holes 71a can be any value within the first spacing range, and the first spacing can be understood as the maximum value of the first spacing range. The spacing between the plurality of second through holes 71b can be any value within the second spacing range, and the second spacing can be understood as the maximum value of the second spacing range. At this time, the maximum spacing value of the first spacing range is less than the minimum spacing value of the second spacing range.

[0139] exist Fig. 9 and Fig.10 In the illustrated embodiment, for ease of description and clear illustration, the spacing between two adjacent first through holes 71a is shown as a relatively small spacing S1, and the spacing between two adjacent second through holes 71b is shown as a relatively large spacing S2. That is, the relatively small spacing S1 can be, but is not limited to, any value within the first spacing range, and the relatively large spacing S2 can be any value within the second spacing range.

[0140] The spacing between the two through holes 71 can be understood, but not limited to, as the spacing distance between the two through holes 71 along the circumference of the motor 100 , or can be understood as the shortest spacing distance between the two through holes 71 , that is, the straight-line spacing distance.

[0141] It should be noted that in Fig. 9 and Fig.10In the illustrated embodiment, there are two second through holes 71b with the largest spacing among the plurality of second through holes 71b along the circumference of the motor 100. The two second through holes 71b with the largest spacing along the circumference of the motor 100 each form a relatively small spacing S1 with the adjacent first through hole 71a, and each form a relatively large spacing S2 with the adjacent second through hole 71b. Among them, the two second through holes 71b with the largest spacing along the circumference of the motor 100 can also be understood as a critical point for distinguishing the plurality of first through holes 71a with relatively small spacing and the plurality of second through holes 71b with relatively large spacing. In other words, the plurality of second through holes 71b with relatively large spacing along the circumference of the motor 100 are the two first through holes 71a with the largest spacing along the circumference of the motor 100.

[0142] Generally, when the motor 100 is working, the oil may be affected by factors such as insufficient oil supply pressure of the external oil pump, oil leakage in the flow path, and gravity, which may result in relatively high heat dissipation requirements and relatively greater heat dissipation difficulty of the winding end 121 on the side away from the oil discharge port 43. This may also cause uneven heat dissipation of the winding end 121 and affect the effect of reducing the overall temperature of the winding end 121, so that the temperature of the winding end 121 cannot be effectively reduced, and the internal structure of the motor 100 is complicated.

[0143] However, the multiple through holes 71 of the oil guide ring 70 of the motor 100 of the present application are arranged unevenly, that is, the arrangement density of the first through holes 71a with a relatively large distance from the oil unloading port 43 among the multiple through holes 71 is greater than the arrangement density of the second through holes 71b with a relatively small distance from the oil unloading port 43 among the multiple through holes 71, so that the through holes 71 arranged on the side of the oil guide ring 70 away from the oil unloading port 43 are denser than the through holes 71 arranged on the side of the oil guide ring 70 toward the oil unloading port 43. Since the heat dissipation requirement and difficulty of the part of the structure where the winding 12 extends out of the iron core 11 toward the oil unloading port 43 are relatively low, in coordination with the placement direction of the motor 100 and the heat dissipation requirement of the part of the structure where the winding 12 extends out of the iron core 11, the side on the outer peripheral surface of the oil guide ring 70 where the through holes 71 are relatively densely arranged can be closer to the top of the winding end 121 along the gravity direction, so that the oil guide ring 70 can transmit more oil to the part of the structure where the winding 12 extends out of the iron core 11 away from the oil unloading port 43, thereby improving the heat dissipation and cooling effect of the oil guide ring 70 at the position where the heat dissipation requirement of the winding 12 is greater, thereby achieving uniform heat dissipation of the oil guide ring 70 to the part of the structure where the winding 12 extends out of the iron core 11. At the same time, the oil transmitted from the oil guide ring 70 to the outer peripheral surface of the winding 12 flows on the outer peripheral surface of the winding 12 due to the action of gravity, which can increase the coverage area of ​​the winding 12 covered by the oil, further enhance the heat dissipation and cooling intensity of the winding 12 by the oil, and enhance the effect of the oil guide ring 70 on uniformly dissipating the heat of the partial structure of the winding 12 extending out of the iron core 11.

[0144] In other words, the multiple through holes 71 on the outer peripheral surface of the oil guide ring 70 are arranged at different intervals corresponding to different positions and directions of the winding end 121, and the density of the multiple through holes 71 on the oil guide ring 70 can be specifically adjusted to meet the heat dissipation requirements and difficulties at different positions and directions of the winding end 121. The multiple through holes 71 arranged unevenly can evenly dissipate heat from the winding end 121 to reduce the temperature of the winding end 121, thereby reducing the overall temperature of the motor 100 during operation, ensuring that the motor 100 can have a good and appropriate operating temperature during operation, and improving the working performance and life of the motor 100.

[0145] Exemplarily, when the motor 100 outputs power to the outside, the oil discharge port 43 of the housing 40 is located at the bottom of the housing 40, and the center of the circle of the oil guide ring 70 is aligned with the vertical direction in the direction of the geometric center of the oil discharge port 43. Since the through holes 71 on the side of the oil guide ring 70 away from the oil discharge port 43 are denser than the through holes 71 arranged on the side of the oil guide ring 70 toward the oil discharge port 43, more oil flows to the side of the winding end 121 away from the oil discharge port 43, that is, the upper part of the winding end 121, thereby improving the heat dissipation effect on the upper part of the winding end 121. Since the oil covering the upper part of the winding end 121 flows downward along the outer circumference of the winding end 121 under the action of gravity, and at least part of the oil flows from the through holes 71 on the side of the oil guide ring 70 toward the oil discharge port 43 to the lower part of the winding end 121, the heat dissipation effect of the lower part of the winding end 121 can be ensured. Thereby, the oil guide ring 70 can achieve the effect of uniformly dissipating heat for the winding end 121 , that is, the temperature at each position of the winding end 121 can be reduced synchronously, so as to achieve the effect of reducing the overall temperature of the motor 100 .

[0146] The power assembly 1000 of the present application is equipped with the motor 100 in any of the above implementations. Since the motor 100 in any of the above implementations uses the non-uniformly arranged through holes 71 on the oil guide ring 70 to evenly dissipate heat and cool the portion of the winding 12 extending out of the iron core 11, the overall heat dissipation effect of the power assembly 1000 can be improved. That is, because the power assembly 1000 of the present application uses the motor 100 in any of the above implementations, the power assembly 1000 of the present application has all the possible beneficial effects of the motor 100 provided by any of the above implementations.

[0147] The electric vehicle of the present application is equipped with the powertrain 1000 in any of the above implementations, which can improve the working performance and life of the electric vehicle of the present application. That is, because the powertrain 1000 in any of the above implementations is used, the electric vehicle of the present application has all the possible beneficial effects of the powertrain 1000 provided by any of the above implementations.

[0148] It should be noted that in Fig.10In the illustrated embodiment, only one possible layout position, structural shape and size of the oil discharge port 43 is used as an example for exemplary description, but the layout position, structural shape and size of the oil discharge port 43 provided in the housing 40 of the motor 100 of the present application are not limited to this. In other embodiments of the present application, the layout position, structural shape and size of the oil discharge port 43 can be adjusted according to actual design requirements, and the embodiments of the present application do not specifically limit this.

[0149] In one embodiment, the plurality of first through holes 71 a are arranged at equal intervals, that is, along the circumference of the motor 100 , the interval between any two adjacent first through holes 71 a among the plurality of first through holes 71 a is the same.

[0150] exist Fig. 9 and Fig.10 In the illustrated embodiment, a plurality of first through holes 71 a are evenly and spacedly arranged on the outer circumferential surface of the oil guide ring 70 along the circumference of the motor 100 , and the relatively small spacing S1 between any first through hole 71 a and its two adjacent first through holes 71 a is equal.

[0151] It can be understood that the relatively small spacing S1 between any first through hole 71a and two adjacent first through holes 71a in the plurality of first through holes 71a is equal, so that the oil guide ring 70 can achieve uniform heat dissipation effect for the positions of the plurality of first through holes 71a corresponding to the winding 12. At the same time, the relatively small spacing S1 of the plurality of first through holes 71a is set uniformly, which can reduce the difficulty and complexity of preparing the oil guide ring 70, so as to improve the production efficiency of the oil guide ring 70, and further improve the production efficiency of the motor 100.

[0152] In one embodiment, along the circumference of the motor 100, the spacing between any two adjacent second through holes 71b among the plurality of second through holes 71b is the same. Fig. 9 and Fig.10 In the illustrated embodiment, the relatively large intervals S2 of the plurality of second through holes 71 b are all equal.

[0153] It can be understood that the spacings between the multiple second through holes 71b are equal, and the oil guide ring 70 can achieve uniform heat dissipation at the positions of the multiple second through holes 71b corresponding to the winding 12. At the same time, the relatively large spacings S2 of the multiple second through holes 71b are set uniformly, which can reduce the overall difficulty and complexity of preparing the oil guide ring 70, thereby improving the production efficiency of the oil guide ring 70, and further improving the production efficiency of the motor 100.

[0154] In one embodiment, along the circumferential direction of the motor 100 , the distance between two through holes 71 with the largest distance between them among the plurality of first through holes 71 a is greater than the distance between two through holes 71 with the largest distance between them among the plurality of second through holes 71 b .

[0155] Specifically, along the circumferential direction of the motor 100, among the plurality of first through holes 71a arranged in sequence, the center angles of the two first through holes 71a at the two ends are the first center angle α1. Among the plurality of second through holes 71b arranged in sequence, the center angles of the two second through holes 71b at the two ends are the second center angle α2. The first center angle α1 is greater than the second center angle α2.

[0156] It can be understood that the first center angle α1 corresponding to the two first through holes 71a with the largest spacing is set to be greater than the second center angle α2 corresponding to the two second through holes 71b with the largest spacing, which can ensure that the coverage area of ​​the oil delivered to the winding 12 through the first through hole 71a is greater than the coverage area of ​​the oil delivered to the winding 12 through the second through hole 71b. Since the first through hole 71a is farther away from the oil discharge port 43 than the second through hole 71b, in conjunction with the placement direction of the motor 100 and the heat dissipation requirements of the part of the structure where the winding 12 extends out of the iron core 11, it can also be understood that the first through hole 71a is closer to the upper area of ​​the winding 12 than the second through hole 71b, so that the heat dissipation cooling intensity and efficiency of the oil guide ring 70 on the upper area of ​​the winding 12 can be improved, and the overall cooling efficiency of the winding 12 can be further improved.

[0157] In one embodiment, the plurality of first through holes 71 a are arranged symmetrically with respect to a line connecting the center of the oil guide ring 70 to the geometric center of the oil discharge port 43 .

[0158] like Fig. 9 and Fig.10 As shown, along the circumference of the motor 100, a plurality of first through holes 71a are symmetrically arranged and have a symmetry line 001, and the symmetry line of the symmetrical arrangement of the plurality of first through holes 71a coincides with the line connecting the center of the oil guide ring 70 to the geometric center of the oil discharge port 43. For the convenience of description and clear illustration, in the specification of this application, the symmetry line of the symmetrical arrangement of the plurality of first through holes 71a is indicated as the symmetry line 001.

[0159] It can be understood that the multiple first through holes 71 a are symmetrically arranged on the outer circumference of the oil guide ring 70 , so that the heat dissipation uniformity of the oil guide ring 70 to the winding end 121 can be improved, and the heat dissipation effect on the winding end 121 can be further improved.

[0160] It should be noted that in Fig. 9 and Fig.10 In the illustrated embodiment, only the cross-sectional areas of the first through holes 71a are equal and the relatively small spacings S1 are equal are used as an example for illustrative description, but the cross-sectional areas of the first through holes 71a of the oil guide ring 70 provided in the embodiment of the present application are not limited to being equal, nor are the relatively small spacings S1 necessarily equal. In other embodiments of the present application, the cross-sectional areas of the first through holes 71a and the relatively small spacings S1 can be adjusted according to actual design requirements.

[0161] For example, in one possible embodiment, see Fig.11 , Fig.11 The schematic cross-sectional structure diagram of the oil guide ring 70 of the motor 100 provided in the embodiment of the present application is shown in FIG. The plurality of first through holes 71 a are arranged equidistantly, and the cross-sectional areas of the plurality of first through holes 71 a decrease in sequence along the direction from the center of the oil guide ring 70 toward the geometric center of the oil discharge port 43 .

[0162] exist Fig.11 In the illustrated embodiment, the relatively small spacings S1 between the plurality of first through holes 71a are all equal, and the plurality of first through holes 71a are symmetrically arranged about the symmetry line 001. The cross-sectional area of ​​the first through holes 71a along the direction in which the plurality of first through holes 71a are sequentially arranged is inversely proportional to the distance from the symmetry line 001, that is, the cross-sectional area of ​​each first through hole 71a gradually decreases from the middle of the plurality of first through holes 71a toward the two ends.

[0163] It can be understood that the cross-sectional area of ​​the through hole 71 will affect the amount of oil flowing out of each through hole 71. Therefore, by setting the cross-sectional area of ​​each first through hole 71a along the direction from the center of the oil guide ring 70 toward the geometric center of the oil discharge port 43 to gradually decrease, the amount of oil flowing out of each first through hole 71a along the direction from the center of the oil guide ring 70 toward the geometric center of the oil discharge port 43 is gradually reduced. In addition, more oil flows from the side of the oil guide ring 70 away from the oil discharge port 43 to the winding end 121, so as to improve the heat dissipation intensity of the winding 12 away from the oil discharge port 43, and further improve the heat dissipation uniformity of the oil guide ring 70 to the winding end 121.

[0164] For example, in one possible embodiment, see Fig.12 , Fig.12 The cross-sectional structure diagram of the oil guide ring 70 of the motor 100 provided in the embodiment of the present application. Along the circumference of the motor 100, the spacing between two adjacent first through holes 71a in the plurality of first through holes 71a increases in both the clockwise direction and the counterclockwise direction. Exemplarily, the spacing of the plurality of first through holes 71a increases in the direction from the center of the circle of the oil guide ring 70 toward the geometric center of the oil discharge port 43. That is, along the direction in which the plurality of first through holes 71a are arranged in sequence, the spacing S1 of the plurality of first through holes 71a increases in sequence from the middle of the plurality of first through holes 71a toward both ends.

[0165] like Fig.12As shown, the density of the through holes 71 arranged on the outer peripheral surface of the oil guide ring 70 gradually decreases along the direction from the center of the oil guide ring 70 toward the geometric center of the oil unloading port 43, so that the amount of oil flowing from the oil guide ring 70 to the winding 12 gradually decreases along the direction from the center of the oil guide ring 70 toward the geometric center of the oil unloading port 43, thereby making more oil flow from the side of the oil guide ring 70 away from the oil unloading port 43 to the winding end 121, so as to improve the heat dissipation intensity of the oil guide ring 70 to the side of the winding 12 away from the oil unloading port 43, and further improve the heat dissipation uniformity of the oil guide ring 70 to the winding end 121.

[0166] For example, in a possible embodiment, along the circumference of the motor 100 , a relatively small interval S1 between two adjacent first through holes 71 a among the plurality of first through holes 71 a increases sequentially in a clockwise direction.

[0167] For example, in a possible embodiment, along the circumference of the motor 100 , a relatively small interval S1 between two adjacent first through holes 71 a among the plurality of first through holes 71 a increases sequentially in a counterclockwise direction.

[0168] In one embodiment, along the direction from the center of the oil guide ring 70 toward the geometric center of the oil unloading port 43 , the number of the second through holes 71 b arranged on the outer peripheral surface of the oil guide ring 70 toward the oil unloading port 43 is three.

[0169] It can be understood that among the three second through holes 71b, the spacing between the second through hole 71b located in the middle and the two second through holes 71b adjacent to it is greater than the spacing between any other two adjacent second through holes 71a. When the oil pump for providing oil is in working state, the oil can be delivered to the winding 12 from the multiple first through holes 71a and the three second through holes 71b, so that the multiple through holes 71 can be used, but not limited to, to deliver at least part of the oil in the gap 111 to the winding end 121 to dissipate heat and cool the side of the winding end 121 facing the oil discharge port 43. Under the action of gravity, the oil delivered to the winding 12 through the oil guide ring 70 flows downward along the outer circumference of the winding 12 and is stored in the lower area of ​​the inner circumference of the oil guide ring 70. That is, part of the oil is stored on the side of the oil guide ring 70 facing the oil discharge port 43.

[0170] When the oil pump for providing oil is in a non-operating state, the second through hole 71b located in the middle of the three second through holes 71b can discharge the stored oil. Fig. 9 and Fig.10As shown, the second through hole 71b arranged in the middle among the three second through holes 71b can realize the function of unloading oil from the oil guide ring 70. That is, the oil stored in the oil guide ring 70 can flow out of the oil guide ring 70 from the middle second through hole 71b, so as to avoid the oil stored in the oil guide ring 70 being unable to flow out and be recycled, which would reduce the heat dissipation and cooling effect of the oil. At the same time, the second through hole 71b arranged in the middle among the three second through holes 71b unloads the oil from the oil guide ring 70, so as to avoid excessive storage of oil in the oil guide ring 70 and affect the working performance and life of other functional structures inside the motor 100.

[0171] exist Fig. 9 and Fig.10 In the illustrated embodiment, the plurality of second through holes 71 b are symmetrically arranged along the circumference of the motor 100 , and the plurality of second through holes 71 b are symmetrically arranged about a symmetry line 001 of the plurality of first through holes 71 a .

[0172] It can be understood that by arranging multiple second through holes 71b and multiple first through holes 71a along the circumference of the motor 100 symmetrically about the same symmetry line 001, the oil guide ring 70 as a whole has a symmetrical structure, so as to reduce the difficulty and complexity of preparing the oil guide ring 70, thereby improving the production efficiency of the oil guide ring 70 and further improving the production efficiency of the motor 100.

[0173] It should be noted that in Fig. 9 and Fig.10 In the embodiment shown, only one possible arrangement number and arrangement mode of the plurality of second through holes 71b is used as an example for exemplary introduction, but the arrangement number and arrangement mode of the plurality of second through holes 71b provided in the embodiment of the present application are not limited to this. In other embodiments of the present application, the arrangement number and arrangement mode of the plurality of second through holes 71b can be adjusted according to actual design requirements, etc., and the embodiment of the present application does not limit this.

[0174] For example, in one possible embodiment, see Fig.13 , Fig.13 The cross-sectional structure diagram of the oil guide ring 70 of the motor 100 provided in the embodiment of the present application is shown in FIG. Fig.13 In the illustrated embodiment, the number of the second through holes 71b may be two. Exemplarily, the spacing between the plurality of second through holes 71b is greater than the spacing between any two other adjacent first through holes 71a. That is, the relatively larger spacing S2 between the two second through holes 71b is greater than any relatively smaller spacing S1.

[0175] Since the plurality of second through holes 71b are arranged on the outer peripheral surface of the oil guide ring 70 facing the oil discharge port 43, and the heat dissipation requirement on the side of the winding end 121 facing the oil discharge port 43 is relatively low and the difficulty is relatively small, all the oil is transported to the winding end 121 through the first through holes 71a, which can enhance the heat dissipation intensity of the oil guide ring 70 to the winding end 121 at a position where the heat dissipation difficulty is relatively high, further enhance the heat dissipation uniformity of the winding end 121, and further enhance the effect and efficiency of reducing the overall temperature of the winding end 121.

[0176] exist Fig.13 In the embodiment shown, the plurality of through holes 71 sequentially arranged on the outer peripheral surface of the oil guide ring 70 around the motor 100 can all be used to guide at least part of the oil in the gap 111 to be transported to the winding end 121. In the direction from the center of the circle of the oil guide ring 70 toward the geometric center of the oil discharge port 43, since part of the oil may be stored on the inner peripheral surface of the oil guide ring 70 near the oil discharge port 43, Fig.13 In the illustrated embodiment, an oil unloading outlet (not shown in the figure) may also be provided, but is not limited to, at a position on the inner circumferential surface of the housing 40 close to or aligned with the oil guide ring 70 close to the oil unloading port 43, so as to unload the oil from the oil guide ring 70 and thereby ensure the circulation of the oil inside the oil guide ring 70.

[0177] For example, in one possible embodiment, see Fig.14 , Fig.14 This is a schematic diagram of a partial cross-sectional structure of the oil guide ring 70 of the motor 100 provided in an embodiment of the present application. Fig.14 In the illustrated embodiment, the number of the second through holes 71b may also be four, and the four second through holes 71b are arranged in pairs, and two relatively large spacings S2 are formed on the outer circumferential surface of the oil guide ring 70. In particular, along the circumferential direction of the motor 100, between the two relatively large spacings S2, the outer circumferential surface of the oil guide ring 70 may also be arranged with a plurality of through holes 71 having spacings within the first spacing range.

[0178] In other words, along the direction from the center of the oil guide ring 70 toward the geometric center of the oil unloading port 43, a plurality of through holes 71 with small spacing are arranged on the outer peripheral surface of the oil guide ring 70 toward the oil unloading port 43, and the spacing between the plurality of through holes 71 with small spacing is smaller than the relatively large spacing S2.

[0179] It can be understood that by arranging a plurality of through holes 71 with small spacing on the outer peripheral surface of the oil guide ring 70 facing the oil discharge port 43, the oil discharge efficiency in the oil guide ring 70 can be improved. At the same time, while ensuring the recycling efficiency of the oil in the oil guide ring 70, the liquid level of the oil stored in the oil guide ring 70 can also be reduced to avoid excessive oil stored in the oil guide ring 70, which causes the oil to contact the rotor 20 of the motor 100 and reduce the working performance and life of the motor 100.

[0180] For an example, see Fig.15 , Fig.15 Schematic diagram of the planar structure of the motor 100 provided in the embodiment of the present application. In order to clearly illustrate the relationship between the through hole 71 of the oil guide ring 70 and the structure of the iron core 11, Fig.15 In the illustrated embodiment, the housing 40, the motor shaft 30, the bearings and other possible functional components of the motor 100 are omitted. Each through hole 71 includes an opening toward the center of the oil guide ring 70. Along the radial direction of the motor 100, the distance L between the opening of at least one through hole 71 toward the center of the oil guide ring 70 and the center of the oil guide ring 70 is greater than or equal to the radius of the inner circumference of the stator 10, that is, the distance L between the opening of at least one through hole 71 toward the center of the oil guide ring 70 and the center of the oil guide ring 70 is greater than or equal to the radius R of the inner circumference 11a of the iron core 11.

[0181] For example, along the direction from the center of the oil guide ring 70 toward the geometric center of the oil discharge port 43, the inner circumferential surface 11a of the iron core 11 has a position O closest to the oil discharge port 43. Fig.15 As shown, the inner peripheral surface 11a of the core 11 has a tangent line 002 at a position O closest to the oil discharge port 43, and the tangent line 002 divides the oil guide ring 70 into two parts. Fig.15 In the figure, they are respectively shown as the first part P1 and the second part P2.

[0182] In the direction from the center of the oil guide ring 70 toward the geometric center of the oil unloading port 43 , the first portion P1 is located on the side of the second portion P2 away from the oil unloading port 43 , that is, the second portion P2 is closer to the oil unloading port 43 than the first portion P1 .

[0183] At least one through hole 71 among the plurality of through holes 71 is arranged on the second portion P2 .

[0184] It can be understood that, since the oil guide ring 70 is annular, part of the oil is stored on the inner circumference of the second portion P2. By providing at least one through hole 71 among the plurality of through holes 71 arranged on the second portion P2, that is, on a portion of the oil guide ring 70 facing the oil discharge port 43, the oil stored in the oil guide ring 70 can flow out from at least one through hole 71, thereby realizing the oil discharge function of the oil guide ring 70, so as to facilitate the recycling of the oil and improve the heat dissipation and cooling effect of the oil on the various functional structures inside the motor 100.

[0185] At the same time, since the inner circumferential surface 11a of the iron core 11 passes through the tangent 002 at the position O closest to the oil unloading port 43 to separate the oil guide ring 70 into two parts, and at least one through hole 71 is arranged on a part of the oil guide ring 70 facing the oil unloading port 43, it can be ensured that there is always a gap between the liquid level of the oil stored in the oil guide ring 70 and the rotor 20 of the motor 100, thereby preventing the stored oil from contacting the rotor 20 and reducing the working performance of the rotor 20.

[0186] It should be noted that for the sake of clarity, Fig.15 In the illustrated embodiment, the oil guide ring 70 is separated into two parts by taking the tangent 002 where the inner circumferential surface 11a of the core 11 passes through the position O closest to the oil discharge port 43 as an example for illustrative description. However, this does not mean that the actual product of the oil guide ring 70 is composed of two parts. In actual design, the oil guide ring 70 can be, but is not limited to, an integral annular structure.

[0187] For an example, see Fig.16 , Fig.16 The schematic diagram of the appearance structure of the oil guide ring 70 of the motor 100 provided in the embodiment of the present application. The outer peripheral surface of the oil guide ring 70 includes multiple rows of through holes 71, and each row of through holes 71 includes multiple first through holes 71a and multiple second through holes 71b. Along the axial direction of the motor 100, the multiple rows of through holes 71 are arranged at intervals. Fig.16 In the illustrated embodiment, the outer peripheral surface of the oil guide ring 70 includes two rows of through holes 71 , and the two rows of through holes 71 are arranged at intervals along the axial direction of the motor 100 .

[0188] It can be understood that multiple rows of through holes 71 are arranged at axial intervals along the motor 100, and the multiple rows of through holes 71 respectively correspond to different positions of the partial structure of the winding 12 extending out of the iron core 11, which can increase the coverage area of ​​the partial structure of the winding 12 extending out of the iron core 11 by the oil delivered to the winding 12 through the oil guide ring 70, and further improve the heat dissipation and cooling effect and efficiency of the partial structure of the winding 12 extending out of the iron core 11.

[0189] It should be noted that the arrangement and spacing of the multiple rows of through holes 71 on the outer peripheral surface of the oil guide ring 70, as well as the cross-sectional area changes of each through hole 71 in each row of through holes 71, can be the same or different. That is, the arrangement, spacing, and cross-sectional area of ​​the multiple rows of through holes 71 on the outer peripheral surface of the oil guide ring 70 can be adjusted according to actual design requirements, and the embodiments of the present application do not specifically limit this.

[0190] For an embodiment, please refer to Fig.17 and Fig.18 , Fig.17 This is a schematic diagram of the appearance structure of the oil guide ring 70 of the motor 100 provided in an embodiment of the present application. Fig.18 A schematic diagram of the partial appearance structure of the oil guide ring 70 of the motor 100 provided in the embodiment of the present application. The outer circumferential surface 70a of the oil guide ring 70 and the inner circumferential surface (not shown in the figure) of the housing 40 include a matching radial protrusion 73 and a radial groove (not shown in the figure), and the radial protrusion 73 is embedded in the radial groove to limit the rotation of the oil guide ring 70 relative to the housing 40.

[0191] Exemplarily, the outer circumferential surface of the oil guide ring 70 includes a plurality of radial protrusions 73. In the radial direction of the motor 100, each radial protrusion 73 extends in a direction away from the center of the oil guide ring 70, and the distance between one end of each radial protrusion 73 away from the center of the oil guide ring 70 and the center of the oil guide ring 70 is greater than the radius of the outer circumferential surface of the stator 10.

[0192] Exemplarily, the outer circumferential surface of the oil guide ring 70 includes a plurality of radial grooves. In the radial direction of the motor 100, each radial groove is recessed toward the center of the oil guide ring 70, and the distance between the groove bottom of each radial groove and the center of the oil guide ring 70 is smaller than the radius of the outer circumferential surface of the stator 10.

[0193] exist Fig.17 and Fig.18 In the illustrated embodiment, the radial protrusion 73 is protruding from the outer peripheral surface 70 a of the oil guide ring 70 , and a radial groove for the radial protrusion to extend into is provided at a position of the housing 40 corresponding to the radial protrusion 73 .

[0194] It can be understood that the radial protrusion 73 protrudes from the outer peripheral surface of the oil guide ring 70 to extend into the housing 40, or the protrusion of the housing 40 extends into the radial groove of the oil guide ring 70, which can achieve the effect of limiting the rotation of the oil guide ring 70 around the axis of the stator 10 relative to the housing 40, and can improve the working stability of the oil guide ring 70. And the oil guide ring 70 is matched with the placement direction of the motor 100, and the second through hole 71b is always kept closer to the oil discharge port 43 than the first through hole 71a, so that the amount of oil delivered to the upper area of ​​the winding 12 through the oil guide ring 70 is always greater than the amount of oil delivered to the lower area of ​​the winding 12, and the uniform heat dissipation effect of the oil guide ring 70 on the partial structure of the winding 12 extending out of the iron core 11 is improved, and the heat dissipation effect and heat dissipation stability of the motor 100 are further improved.

[0195] In one embodiment, the number of radial protrusions 73 may be but is not limited to multiple. Multiple radial protrusions 73 are arranged at intervals on the outer peripheral surface 70a of the oil guide ring 70 along the axial direction of the motor 100 to enhance the limiting effect on the movement of the oil guide ring 70 and further enhance the working stability of the oil guide ring 70.

[0196] In one embodiment, the oil guide ring 70 is further provided with a plurality of supporting protrusions 74. Fig.17 and Fig.18 In the illustrated embodiment, a plurality of support protrusions 74 are protruded from the outer peripheral surface 70a of the oil guide ring 70, and the plurality of support protrusions 74 are arranged at intervals along the circumference of the motor 100 to enhance the overall structural strength of the oil guide ring 70 and enhance the shaping effect of the oil guide ring 70, thereby enhancing the working performance and life of the oil guide ring 70.

[0197] For an example, see Fig.19 , Fig.19A schematic diagram of a partial cross-sectional structure of a motor 100 provided in an embodiment of the present application. The outer peripheral surface of the oil guide ring 70 includes a plurality of diversion slopes 75, each of which is used to guide the oil flowing out of the gap 111 into one or more first through holes 71a. Specifically, each diversion slope 75 is recessed toward the through hole 71 so as to guide the oil to flow into the first through hole 71a.

[0198] It can be understood that the drainage slope 75 is concave on the outer peripheral surface 70a of the oil guide ring 70, and part of the oil flowing out of the gap 111 flows into the oil guide ring 70 and flows into the drainage slope 75 arranged on the outer peripheral surface 70a of the oil guide ring 70. The oil is drained through the drainage slope 75 and flows to the through hole 71, which can improve the speed and effect of the oil flowing to the through hole 71, thereby improving the heat dissipation and cooling efficiency of the oil on the end of the winding 12 extending out of the iron core 11.

[0199] The drainage slope 75 is arranged on the outer peripheral surface 70a of the oil guide ring 70, so that the drainage slope 75 is constructed as an annular groove structure, so that the oil can flow along the bottom of the groove and flow to the multiple through holes 71 arranged at intervals, thereby ensuring that the multiple through holes 71 of the oil guide ring 70 can continuously and stably flow with oil, so as to improve the heat dissipation and cooling stability of the winding end 121.

[0200] It should be noted that in Fig.19 In the illustrated embodiment, only one structural shape and size of the drainage slope 75 on the outer peripheral surface 70a of the oil guide ring 70 is used as an example for exemplary description, but the structural shape and size of the drainage slope 75 provided in the embodiment of the present application are not limited to this. In other embodiments of the present application, the cross-sectional shape of the drainage slope 75 along the circumference of the motor 100 can be, but is not limited to, a combination of one or more shapes such as a rectangle, an arc, a triangle, and a trapezoid.

[0201] In one embodiment, Fig.19 In the illustrated embodiment, along the axial direction of the motor 100, the length W of the winding 12 extending out of the stator 10 and the spacing P between the axis of the through hole 71 and the end surface of the oil guide ring 70 facing the iron core 11 satisfy the condition: W / 3≤P≤2W / 3. The length W of the winding 12 extending out of the iron core 11 can be understood as the length dimension W of the winding end 121 along the axial direction of the motor 100.

[0202] It can be understood that along the axial direction of the motor 100, the position of the through hole 71 relative to the winding end 121 is that the through hole 71 is roughly located in the middle of the partial structure of the winding 12 extending out of the iron core 11, so that when the oil flowing out of the through hole 71 flows toward the winding 12, it extends from the middle of the partial structure of the winding 12 extending out of the iron core 11 toward both ends, which can ensure the heat dissipation effect of the oil guide ring 70 on the overall structure of the partial structure of the winding 12 extending out of the iron core 11.

[0203] In one embodiment, along the radial direction of the motor 100, the distance between the outer circumference of the oil guide ring 70 and the outer circumference of the stator 10 is between 2-3 mm. That is, along the radial direction of the motor 100, the distance U between the outer circumference 70a of the oil guide ring 70 and the outer circumference 11b of the iron core 11 is between 2-3 mm.

[0204] exist Fig.19 In the illustrated embodiment, the oil guide ring 70 is held between the iron core 11 and the housing 40 along the axis of the motor 100, and the outer diameter of the oil guide ring 70 is smaller than the outer diameter of the iron core 11, so that the oil guide ring 70 forms an annular groove structure between the iron core 11 and the housing 40. After the oil flows to the outer peripheral surface 70a of the oil guide ring 70, the groove position formed by the structure of the oil guide ring 70 is gathered to form a storage effect, so as to improve the flow effect of the oil from the through hole 71 of the oil guide ring 70 toward the winding 12, thereby improving the heat dissipation and cooling effect of the oil on the winding 12.

[0205] At the same time, by setting the difference between the radius of the outer peripheral surface 11b of the radial core 11 of the motor 100 and the radius of the outer peripheral surface 70a of the oil guide ring 70 to be between 2-3mm, it is avoided that the difference between the two is too large, which causes the path of part of the oil in the gap 111 to flow to the oil guide ring 70 to increase, thereby reducing the heat dissipation and cooling efficiency of the oil on the part of the structure extending out of the core 11 of the winding 12.

[0206] That is, the difference between the radius of the outer peripheral surface 11b of the radial core 11 of the motor 100 and the radius of the outer peripheral surface 70a of the oil guide ring 70 is between 2-3mm. While ensuring the flow effect of the oil from the through hole 71 toward the partial structure of the winding 12 extending out of the core 11, it can also shorten the path of the oil flowing from the gap 111 to the oil guide ring 70 to improve the heat dissipation and cooling efficiency of the oil.

[0207] In one embodiment, the winding 12 includes a plurality of wires, the cross-sectional shape of the wires along the length direction of the wires is rectangular, and the distance M between the inner circumference of the oil guide ring 70 and the outer side of the winding 12 along the radial direction of the stator 10 is between 1-3 cm.

[0208] In one embodiment, the cross-sectional shape of the wire along the length direction of the wire is circular, and the distance M between the inner circumference of the oil guide ring 70 and the outer side of the winding 12 along the radial direction of the stator 10 is between 0.5-2 mm.

[0209] It is understandable that the cross-sectional shapes of the wires are different, and the corresponding winding ends 121 have different structural shapes and structural sizes. In the embodiment of the present application, by corresponding to the different structural shapes and sizes of the winding ends 121, the distances between the oil guide ring 70 and the outer sides of the winding ends 121 are respectively limited to be different along the radial direction of the motor 100, so that the flow effect of the oil flowing out of the through hole 71 and flowing to the winding ends 121 can be ensured corresponding to the winding ends 121 of different structural shapes and sizes, thereby improving the heat dissipation and cooling effect of the winding ends 121. At the same time, it can also improve the adaptability of the oil guide ring 70 and expand the scenarios in which the oil guide ring 70 can be applied.

[0210] For an embodiment, please refer to Fig. 20 and Fig.21 , Fig. 20 Schematic diagram of the cross-sectional structure of the motor 100 provided in the embodiment of the present application, Fig.21 Schematic diagram of a partial cross-sectional structure of the motor 100 provided in the embodiment of the present application. In order to clearly illustrate the positions of the two openings of the internal flow channel 442 relative to the oil guide ring 70 and the motor bearing 80, Fig.21 In the illustrated embodiment, part of the structure of the motor end cover 44 of the motor 100 and other possible functional structures of the motor 100 are hidden. Fig. 20 and Fig.21 As shown, the housing 40 includes a motor end cover 44, and the motor end cover 44 includes a bearing accommodating cavity 441, and the bearing accommodating cavity 441 is used to accommodate a motor bearing 80. The motor bearing 80 is coaxially sleeved on the motor shaft 30 of the motor 100.

[0211] The motor shaft 30 of the motor 100 passes through the motor end cover 44 via the bearing accommodating cavity 441 , and the motor shaft 30 extends out of the motor end cover 44 to be transmission-connected with an external transmission member, so that the motor 100 can output power to the outside through the motor shaft 30 .

[0212] The motor end cover 44 is attached to the end face of the oil guide ring 70 away from the iron core 11 along the axial direction of the stator 10. The oil guide ring 70 is arranged to be held between the iron core 11 and the motor end cover 44 along the axial direction of the stator 10 to fix the oil guide ring 70 and ensure the uniform heat dissipation and cooling effect of the oil guide ring 70 on the winding end 121.

[0213] exist Fig. 20 and Fig.21 In the illustrated embodiment, the motor end cover 44 includes an internal flow channel 442 , and the internal flow channel 442 is used to guide part of the oil flowing through the oil guide ring 70 to the motor bearing 80 .

[0214] Specifically, the internal flow channel 442 includes an inlet and an outlet. The inlet opens toward the oil guide ring 70, and along the radial direction of the motor 100, the distance between the inlet and the axis of the motor 100 is greater than the distance between the outer peripheral surface of the oil guide ring 70 and the axis of the motor 100. The outlet opens toward the motor bearing 80. That is, the inlet of the internal flow channel 442 toward the end surface of the oil guide ring 70 at least partially exposes the outer peripheral surface 70a of the oil guide ring 70, along the axial direction of the motor 100.

[0215] It can be understood that the internal flow channel 442 is connected between the oil guide ring 70 and the motor bearing 80, and part of the oil delivered to the outer peripheral surface of the oil guide ring 70 is divided at the oil guide ring 70, and at least part of the oil is delivered from the through hole 71 of the oil guide ring 70 to the part of the structure where the winding 12 extends out of the iron core 11 for heat dissipation and cooling, and at least part of the oil flows to the internal flow channel 442 and is drained to the motor bearing 80 through the internal flow channel 442, so as to achieve lubrication and heat dissipation effects on the motor bearing 80.

[0216] At the same time, at least part of the oil flowing through the oil guide ring 70 flows from the internal flow channel 442 toward the inlet of the end surface of the oil guide ring 70 into the internal flow channel 442. By arranging the outlet of the internal flow channel 442 along the axial direction of the motor 100 toward the motor bearing 80, the oil in the internal flow channel 442 can lubricate the motor bearing 80 after flowing out and achieve heat dissipation and cooling of the motor bearing 80.

[0217] In other words, the oil guide ring 70 diverts part of the oil flowing out of the gap 111 at the oil guide ring 70 and delivers it to the motor bearing 80 from the internal flow channel 442, so as to achieve the effects of lubrication, heat dissipation and cooling of the motor bearing 80, thereby realizing the reuse of the oil guide ring 70 to improve the utilization rate of the internal structure of the motor 100, avoiding the complex oil channel designed separately inside the motor 100 for delivering oil to the motor bearing 80, simplifying the internal structure design of the motor 100 and reducing the difficulty of producing the motor 100.

[0218] It should be noted that in Fig.21 In the illustrated embodiment, only a possible layout position, structure shape, structure size and other features of the partial structural shape of the internal flow channel 442 are used as an example for illustrative description, but the layout position, structure shape, structure size and other features of the internal flow channel 442 provided in the embodiment of the present application are not limited to this. In other embodiments of the present application, the internal flow channel 442 can also be other structural parts that can realize the drainage of part of the oil on the oil guide ring 70 to the bearing accommodating cavity 441, and the embodiment of the present application does not make specific limitations on this.

[0219] In one embodiment, the ratio of the cross-sectional area of ​​the through hole 71 to the opening cross-sectional area of ​​the entrance of the internal flow channel 442 is greater than or equal to 0.5 and less than or equal to 2.

[0220] It can be understood that the size of the cross-sectional area of ​​the through hole 71 relative to the opening cross-sectional area of ​​the entrance of the internal flow channel 442 will affect the amount of oil flowing through the oil guide ring 70 that is diverted to the through hole 71 and the internal flow channel 442 respectively.

[0221] The cross-sectional area of ​​the through hole 71 is too large relative to the cross-sectional area of ​​the opening of the entrance of the internal flow channel 442, which may cause too much oil flowing through the outer peripheral surface of the oil guide ring 70 to be diverted to the through hole 71, and the amount of oil diverted to the internal flow channel 442 is insufficient, thereby reducing the lubrication effect and heat dissipation cooling effect of the motor bearing 80. The cross-sectional area of ​​the through hole 71 is too small relative to the cross-sectional area of ​​the entrance of the internal flow channel 442, which may cause too much oil flowing through the oil guide ring 70 to be diverted to the internal flow channel 442, and the amount of oil diverted to the through hole 71 is insufficient, resulting in poor heat dissipation cooling effect of the oil guide ring 70 on the part of the structure where the winding 12 extends out of the iron core 11.

[0222] In the embodiment of the present application, by limiting the ratio between the cross-sectional area of ​​the through hole 71 and the opening cross-sectional area of ​​the entrance of the internal flow channel 442 to be between 0.5 and 2, it is possible to ensure that the oil guide ring 70 has a heat dissipation and cooling effect on the partial structure of the winding 12 extending out of the iron core 11, while also ensuring that sufficient oil is diverted to the internal flow channel 442 to provide good lubrication and heat dissipation cooling effects on the motor bearing 80.

[0223] In one embodiment, along the axial direction of the motor 100 , the distance between the axis of the through hole 71 and the entrance is less than or equal to 2 cm.

[0224] For an example, see Fig. 22 , Fig. 22 This is a schematic diagram of the internal oil circuit structure of the powertrain 1000 provided in the embodiment of the present application. Fig. 22 In the illustrated embodiment, the power assembly 1000 includes a heat exchanger 1002, an oil pump 1003, an oil filter 1004, and an oil tank 1005. The heat exchanger 1002, the oil pump 1003, the oil filter 1004, and the oil tank 1005 are interconnected and work in coordination with each other to realize functions such as oil supply, oil return, and oil circulation within the power assembly 1000.

[0225] For example, the heat exchanger 1002 can be, but is not limited to, connected to the reducer receiving chamber 42 and the motor receiving chamber 41 of the power assembly 1000, and the oil carrying heat is transported to the heat exchanger 1002 and heat is exchanged by the heat exchanger 1002 to output the cooling oil to the outside. That is, the heat exchanger 1002 can provide cooling oil to the reducer 101 and the motor 100 respectively, so as to dissipate heat and cool the reducer 101 and the motor 100, thereby enabling the reducer 101 and the motor 100 to work in a suitable temperature environment, further improving the working performance and life of the power assembly 1000.

[0226] Exemplarily, the heat exchanger 1002 may also be, but not limited to, connected to the controller receiving cavity, and can deliver cooling oil to the controller and be used for heat dissipation and cooling of the controller.

[0227] Exemplarily, the oil tank 1005 is respectively connected to the reducer housing chamber 42, the motor housing chamber 41 and the controller housing chamber, etc. After the oil completes the heat dissipation and cooling of the reducer 101, the motor 100, the controller and other functional structural parts in the powertrain 1000, the used oil can flow back into the oil tank 1005.

[0228] Exemplarily, the oil filter device 1004 is connected between the oil pump 1003 and the oil tank 1005. The oil filter device 1004 is used to filter impurities in the oil to ensure the cleanliness of the oil, and to prevent the oil from being mixed with impurities, abrasive particles, etc. when it is reused, which may damage the functional structural parts in the powertrain 1000. The filtered oil can be transported to the heat exchanger 1002 through the oil pump 1003.

[0229] That is, by setting up the oil filter device 1004 to filter impurities in the oil, the oil recycling effect can be achieved and the service life of the oil can be improved, and the working performance and life of the power assembly 1000 can also be improved. Among them, the oil in the oil tank 1005 can be transported to the oil filter device 1004 by using devices or structural parts such as an oil suction pipe, but it is not limited to.

[0230] Exemplarily, a plurality of oil pipes 1006 are arranged in the power assembly 1000 , and the plurality of oil pipes 1006 are connected between various functional structural components inside the power assembly 1000 to realize the oil delivery function inside the power assembly 1000 .

[0231] It should be noted that in Fig. 22 In the illustrated embodiment, only one possible flow path of the oil in the powertrain 1000 is used as an example for illustrative description. However, the device or structural member for realizing the flow of the oil in the powertrain 1000 of the present application is not limited to this, nor is the layout position and structural size characteristics of each functional structural member in the powertrain 1000 limited to this. In other embodiments of the present application, the flow path of the oil in the powertrain 1000 can be adjusted according to actual design requirements, application scenarios, and functional requirements to be met, etc., and the embodiments of the present application do not make specific limitations on this.

[0232] Of course, the above-mentioned embodiments can be applied individually or in combination. The above is the preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also regarded as the scope of protection of the present application.

Claims

1. A motor with non-uniformly arranged oil guide ring through holes, characterized in that: The motor comprises a housing, a stator and an oil guide ring. The housing is provided with an oil discharge port, and the oil discharge port is used to discharge the oil in the housing. The oil guide ring is arranged adjacent to the stator along the axial direction of the motor. The oil guide ring comprises a plurality of through holes, each of which is used to transmit oil to cool the winding. Each through hole passes through the oil guide ring along the radial direction of the motor. The plurality of through holes comprises a plurality of first through holes and a plurality of second through holes, wherein: Along the circumference of the motor, the plurality of first through holes are sequentially spaced apart, the plurality of second through holes are sequentially spaced apart, and the spacing between any two adjacent first through holes is smaller than the spacing between any two adjacent second through holes; The distance between each of the first through holes and the oil unloading port is greater than the distance between each of the second through holes and the oil unloading port.

2. The motor according to claim 1, characterized in that Along the circumference of the motor, the distance between any two adjacent first through holes is less than or equal to the first distance, and the distance between any two adjacent second through holes is less than or equal to the second distance and greater than the first distance.

3. The motor according to claim 1, characterized in that The number of the plurality of first through holes is greater than the number of the plurality of second through holes; wherein: The number of the second through holes is two or three.

4. The motor according to claim 1, characterized in that Along the circumference of the motor, the distance between two through holes with the largest distance between them among the plurality of first through holes is greater than the distance between two through holes with the largest distance between them among the plurality of second through holes.

5. The motor according to claim 1, characterized in that Along the circumferential direction of the motor, the spacing between any two adjacent first through holes in the plurality of first through holes is the same, or the spacing between any two adjacent second through holes in the plurality of second through holes is the same.

6. The motor according to claim 1, characterized in that Along the circumference of the motor, the distance between two adjacent first through holes in the plurality of first through holes increases sequentially along at least one of a clockwise direction or a counterclockwise direction.

7. The motor according to claim 1, characterized in that Each of the through holes comprises an opening facing the center of the oil guide ring, wherein: Along the radial direction of the motor, a distance between an opening of at least one of the through holes toward the center of the oil guide ring and the center of the oil guide ring is greater than or equal to a radius of the inner circumferential surface of the stator.

8. The motor according to claim 1, characterized in that Along the axial direction of the motor, a length W of the winding extending out of the stator and a spacing P between the axis of the through hole and the end surface of the oil guide ring facing the stator satisfy the condition: W / 3≤P≤2W / 3.

9. The motor according to claim 1, characterized in that The housing comprises an intermediate housing and a motor end cover, wherein the intermediate housing is used to fix the stator of the motor, the motor end cover comprises a bearing accommodating cavity, the bearing accommodating cavity is used to accommodate the motor bearing, the motor end cover comprises an internal flow channel, and the internal flow channel comprises an inlet and an outlet, wherein: The opening of the inlet faces the oil guide ring, and the distance between the inlet and the axis of the motor along the radial direction of the motor is greater than the distance between the outer peripheral surface of the oil guide ring and the axis of the motor; The outlet opens toward the motor bearing.

10. The motor according to claim 9, characterized in that A ratio between a cross-sectional area of ​​the through hole and an opening cross-sectional area of ​​the inlet is greater than or equal to 0.5 and less than or equal to 2.

11. The motor according to claim 9, characterized in that Gaps are respectively provided between the intermediate housing and the outer circumferential surface of the stator and the outer circumferential surface of the oil guide ring. The outer circumferential surface of the oil guide ring includes a plurality of drainage slopes, each of which is used to guide the oil flowing out of the gap into one or more of the first through holes.

12. The motor according to claim 1, characterized in that The outer peripheral surface of the oil guide ring includes a plurality of radial protrusions or a plurality of radial grooves, wherein: Each of the radial protrusions extends in a direction away from the center of the oil guide ring along the radial direction of the motor, and the distance between one end of each of the radial protrusions away from the center of the oil guide ring and the center of the oil guide ring is greater than the radius of the outer peripheral surface of the stator; Each radial groove is recessed toward the center of the oil guide ring along the radial direction of the motor, and the distance between the groove bottom of each radial groove and the center of the oil guide ring is smaller than the radius of the outer peripheral surface of the stator.

13. The motor according to claim 1, characterized in that The outer peripheral surface of the oil guide ring includes a plurality of rows of through holes, each row of through holes includes a plurality of the first through holes and a plurality of the second through holes, and the plurality of rows of through holes are arranged at intervals along the axial direction of the motor.

14. A powertrain, characterized in that: The powertrain is used to receive power from a power battery of an electric vehicle and to drive the wheels of the electric vehicle. The powertrain includes a reducer and a motor according to any one of claims 1 to 13. The motor is connected to the wheels through the reducer. The powertrain is fixedly connected to the body of the electric vehicle, wherein: The motor is fixed in the power assembly of the vehicle body, the oil discharge port of the motor housing is located at the bottom of the housing along the vertical direction, and the line connecting the center of the oil guide ring and the geometric center of the oil discharge port coincides in the vertical direction.

15. An electric vehicle, characterized in that: It comprises wheels, a power battery and a powertrain as claimed in claim 14, wherein the powertrain is used to receive power from the power battery and to drive the wheels.

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