Oil injection ring of motor, motor, power assembly and vehicle

Abstract

The invention discloses an oil injection ring of a motor, the motor, a power assembly and a vehicle. The oil injection ring of the motor comprises a main body piece, the interlayer rings are arranged on one side of the main body part, the interlayer rings are concentrically arranged in the radial direction of the main body part, a containing space is formed between every two adjacent interlayer rings and used for containing a stator winding of the motor, and oil spraying holes are formed in the side walls, facing the containing spaces, of the interlayer rings. Therefore, the plurality of interlayer rings are concentrically arranged in the radial direction of the main body piece, the accommodating space is formed between every two adjacent interlayer rings, and the oil spraying holes are formed in the side walls, facing the accommodating spaces, of the interlayer rings, so that oil in the interlayer rings can be correspondingly sprayed to the stator windings in the accommodating spaces through the oil spraying holes; layered cooling of the oil injection ring on the stator winding can be achieved, cooling can be more comprehensive, and the cooling effect can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to an oil injection ring of a motor, a motor, a power assembly and a vehicle. Background Art

[0002] With the continuous promotion and popularization of new energy vehicles, the requirements for the development of drive motors are becoming more and more stringent. The future development trend of motors will inevitably be high speed, high power density, more compact structure, further improved efficiency, and high integration. This development trend puts forward higher cooling requirements for motors. Compared with air cooling and water cooling, oil cooling allows the cooling oil to directly contact the heating part, which has a good heat dissipation effect, and the cooling oil is insulated. The oil cooling system is safer than the water cooling system, so it is widely used. The main technical solutions for oil injection cooling are oil injection in the circumference of the injection ring and oil injection in the axial oil circuit of the iron core.

[0003] In the related art, for the circumferential oil injection of the injection ring, although the injection ring has a simple structure and is easy to assemble, the oil holes are arranged on the inside of the injection ring, and the cooling position is mainly the outer envelope of the winding. The cooling of the inside of the winding mainly relies on the natural flow of cooling oil. For multi-layer windings, there may be incomplete cooling, resulting in unclear cooling effect inside the winding, the generation of hot spots, and affecting the insulation life of the winding. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide an oil injection ring of a motor, which can fully cool the stator winding, with better cooling uniformity and better cooling effect.

[0005] The present invention further provides a motor.

[0006] The present invention further provides a powertrain.

[0007] The present invention further provides a vehicle.

[0008] According to an embodiment of the present invention, the oil injection ring of the motor includes: a main body; an interlayer ring, wherein the interlayer ring is arranged on one side of the main body and is in plurality, the plurality of interlayer rings are concentrically arranged in the radial direction of the main body, an accommodating space is arranged between two adjacent interlayer rings, the accommodating space is used to accommodate the stator winding of the motor, and an oil injection hole is arranged on the side wall of the interlayer ring facing the accommodating space.

[0009] Therefore, by concentrically arranging multiple interlayer rings in the radial direction of the main body, a accommodating space is arranged between two adjacent interlayer rings, and oil injection holes are arranged on the side walls of the interlayer rings facing the accommodating space, the oil in the interlayer rings can be sprayed toward the stator winding in the accommodating space through the oil injection holes, thereby realizing layered cooling of the stator winding by the oil injection ring, which can not only make the cooling more comprehensive, but also improve the cooling effect.

[0010] In some examples of the present invention, there are a plurality of the oil injection holes, and the plurality of the oil injection holes are circumferentially spaced apart on the side wall of the interlayer ring to correspond to the gaps of the stator winding of the motor.

[0011] In some examples of the present invention, the interlayer ring includes a first interlayer ring and a second interlayer ring, there are two first interlayer rings, the two first interlayer rings are spaced apart in the radial direction of the main body, the oil injection holes are respectively provided on the side walls on opposite sides of the two first interlayer rings, there is at least one second interlayer ring and it is radially spaced apart between the two first interlayer rings, and the oil injection holes are provided on the side walls of the second interlayer ring facing the two first interlayer rings.

[0012] In some examples of the present invention, the oil injection ring is an oil injection ring made of a heat-conducting material, and the oil injection ring is used for heat-conducting cooperation with the stator winding of the motor.

[0013] In some examples of the present invention, the fuel injection ring of the motor further includes a star point ring, which is used to be electrically connected to the stator winding of the motor, and the star point ring and the fuel injection ring are integrally formed structural parts.

[0014] In some examples of the present invention, the oil injection ring of the motor further includes a slip ring, which is used to be electrically connected to the stator winding of the motor, and the slip ring and the oil injection ring are integrally formed structural parts.

[0015] In some examples of the present invention, the fuel injection ring is provided with a first positioning hole and a second positioning hole arranged at a circumferential interval, the star point ring is provided with a first electrical connector, the first electrical connector is extended in the axial direction of the fuel injection ring and extends from the first positioning hole, the collector ring is provided with a second electrical connector, the second electrical connector is extended in the axial direction of the fuel injection ring and extends from the second positioning hole, and the first electrical connector and the second electrical connector are both used for electrical connection with the stator winding of the motor.

[0016] In some examples of the present invention, a third electrical connector is provided on the star-point ring, a fourth electrical connector is provided on the merge ring, a first avoidance hole and a second avoidance hole arranged circumferentially at intervals are provided on an end face of one end of the injection ring, the third electrical connector extends from the first avoidance hole, the fourth electrical connector extends from the second avoidance hole, and the third electrical connector and the fourth electrical connector are both used for electrical connection with the electronic control component.

[0017] According to an embodiment of the present invention, the motor comprises: a stator, wherein the stator comprises: a stator core and a stator winding, wherein the stator winding is protrudingly arranged at both ends of the stator core, and the stator winding is multi-layered, and the multi-layer stator winding is arranged in the radial direction of the stator core; the oil injection ring of the motor described above, wherein the oil injection ring is arranged at at least one end of the stator core, and at least one layer of the stator winding is arranged in the accommodating space between two adjacent interlayer rings.

[0018] In some examples of the present invention, a first positioning hole and a second positioning hole are provided on the fuel injection ring, the fuel injection ring includes a star point ring and a collector ring, the star point ring is provided with a first electrical connector, the collector ring is provided with a second electrical connector, the stator winding is provided with a fifth electrical connector and a sixth electrical connector, the fifth electrical connector and the sixth electrical connector are both extended in the axial direction of the stator winding, the first electrical connector and the fifth electrical connector both extend from the first positioning hole and are electrically connected to each other, and the second electrical connector and the sixth electrical connector both extend from the second positioning hole and are electrically connected to each other.

[0019] In some examples of the present invention, a first oil inlet and a first oil outlet are provided on the stator core, the first oil inlet is connected to the first oil outlet, a second oil inlet is provided on the oil injection ring, the second oil inlet is connected to the first oil outlet, and the oil injection hole is connected to the second oil inlet.

[0020] In some examples of the present invention, the first oil inlet is located on the circumferential outer side wall of the stator core, the first oil outlet is provided on the side of the stator core facing the oil injection ring, and the second oil inlet is provided on the side of the oil injection ring facing the stator core.

[0021] In some examples of the present invention, the stator core is provided with a plug-in groove, the oil injection ring is provided with a plug-in protrusion, the plug-in groove and the plug-in protrusion are plug-fitted, the first oil outlet is provided at the plug-in groove, the second oil inlet is provided at the plug-in protrusion, and the first oil outlet and the second oil inlet are arranged opposite to each other and are connected to each other.

[0022] In some examples of the present invention, there are multiple plug-in slots, which are spaced apart in the circumferential direction of the stator core; there are multiple plug-in protrusions, which are spaced apart in the circumferential direction of the oil injection ring; and there are multiple plug-in protrusions and multiple plug-in slots corresponding one to one.

[0023] A powertrain according to an embodiment of the present invention includes: the motor described above.

[0024] A vehicle according to an embodiment of the present invention includes: the powertrain described above.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0027] Figure 1 is a schematic diagram of a motor according to an embodiment of the present invention;

[0028] Figure 2 is an exploded diagram of a motor according to an embodiment of the present invention;

[0029] Figure 3 is a schematic diagram of the flow direction of oil inside a motor according to an embodiment of the present invention;

[0030] Figure 4 yes Figure 3 Schematic diagram of area A in the middle;

[0031] Figure 5 is a schematic diagram of an oil injection ring of a motor according to an embodiment of the present invention;

[0032] Figure 6 yes Figure 5 Schematic diagram of area B in the middle;

[0033] Figure 7 is a schematic diagram of another oil injection ring of a motor according to an embodiment of the present invention;

[0034] Figure 8 yes Figure 7 Schematic diagram of the middle C area;

[0035] Fig. 9 is a schematic diagram of another oil injection ring of a motor according to an embodiment of the present invention;

[0036] Fig.10 is a schematic diagram of a stator according to an embodiment of the present invention;

[0037] Fig.11 Schematic diagram of a star-point ring and a slip ring according to an embodiment of the present invention.

[0038] Reference numerals:

[0039] 100. Motor;

[0040] 10. fuel injection ring; 11. main body; 111. second fuel inlet; 112. plug-in protrusion; 113. first positioning hole; 114. second positioning hole; 115. first avoidance hole; 116. second avoidance hole; 12. interlayer ring; 121. first interlayer ring; 122. second interlayer ring; 123. fuel injection hole; 124. accommodation space;

[0041] 20. stator; 21. stator core; 211. first oil inlet; 212. first oil outlet; 213. plug-in slot; 22. stator winding; 221. fifth electrical connector; 222. sixth electrical connector;

[0042] 30. Star point ring; 31. First electrical connection member; 32. Third electrical connection member;

[0043] 40. Slip ring; 41. Second electrical connector; 42. Fourth electrical connector. DETAILED DESCRIPTION

[0044] Embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Embodiments of the present invention are described in detail below.

[0045] Reference below Figure 1-Figure 11 The oil injection ring 10 of the motor 100 according to the embodiment of the present invention is described. The oil injection ring 10 can be applied to the motor 100, the motor 100 can be applied to a powertrain, and the powertrain can be applied to a vehicle.

[0046] Combination Figure 3-Figure 8 As shown, the oil injection ring 10 of the motor 100 according to the present invention may mainly include: a main body 11 and an interlayer ring 12, wherein the interlayer ring 12 is arranged on one side of the main body 11 and is multiple, the multiple interlayer rings 12 are concentrically arranged in the radial direction of the main body 11, and an accommodating space 124 is arranged between two adjacent interlayer rings 12, the accommodating space 124 is used to accommodate the stator winding 22 of the motor 100, and an oil injection hole 123 is arranged on the side wall of the interlayer ring 12 facing the accommodating space 124.

[0047] Specifically, the oil injection ring 10 of the motor 100 can be arranged on the periphery of the motor 100, and the motor 100 is cooled by oil to achieve heat dissipation of the motor 100. The oil injection ring 10 includes a main body 11 and an interlayer ring 12, and the interlayer ring 12 is provided in plurality, so that the plurality of interlayer rings 12 are provided on one side of the main body 11 and are concentrically arranged in the radial direction of the main body 11, so that a receiving space 124 can be formed between two adjacent interlayer rings 12, and an oil injection hole 123 is provided on the side wall of the interlayer ring 12 facing the receiving space 124, so that after the oil injection ring 10 is applied to the motor 100, the receiving space 124 The stator winding 22 of the motor 100 can be accommodated, so that the multiple layers of stator winding 22 spaced apart in the radial direction can correspond to the multiple accommodating spaces 124, and the oil in the interlayer ring 12 can be sprayed toward the stator winding 22 in the accommodating space 124 through the oil spray hole 123. Compared with the oil spray ring in the prior art which mainly cools the outer envelope of the winding and only relies on the oil flow to take away the heat inside, the oil spray ring 10 of the present application can realize the layered cooling of the stator winding 22, which can not only make the cooling more comprehensive and avoid the occurrence of hot spots inside the stator winding 22, but also can actively spray the oil toward each layer of the stator winding 22, thereby improving the cooling effect.

[0048] Therefore, by concentrically arranging multiple interlayer rings 12 in the radial direction of the main body 11, a receiving space 124 is arranged between two adjacent interlayer rings 12, and an oil injection hole 123 is arranged on the side wall of the interlayer ring 12 facing the receiving space 124. In this way, the oil in the interlayer ring 12 can be sprayed toward the stator winding 22 in the receiving space 124 through the oil injection hole 123, so that the layered cooling of the stator winding 22 by the oil injection ring 10 can be achieved, which can not only make the cooling more comprehensive, but also improve the cooling effect.

[0049] Combination Figure 5-Figure 8 As shown, there are multiple oil injection holes 123, and the multiple oil injection holes 123 are circumferentially spaced on the side wall of the interlayer ring 12 to correspond to the gap of the stator winding 22 of the motor 100. Specifically, the oil injection holes 123 can be set to be multiple, and the multiple oil injection holes 123 are circumferentially spaced on the side wall of the interlayer ring 12, so that the oil can be sprayed from the multiple oil injection holes 123, and sprayed to the stator winding 22 circumferentially arranged in the accommodating space 124, so that the oil can cool and dissipate the circumferential parts of the stator winding 22, thereby improving the uniformity and comprehensiveness of the cooling of the stator winding 22 by the oil injection ring 10.

[0050] Furthermore, considering that each layer of stator winding 22 is also composed of multiple stator windings 22 arranged in a specific direction in the circumferential direction, there are gaps between the multiple stator windings 22 in the circumferential direction. By making the multiple oil injection holes 123 correspond to the gaps between the multiple stator windings 22, the oil sprayed from the interlayer ring 12 can flow into the gaps between the various stator windings 22 through the gaps to cool and dissipate the heat of each stator winding 22. In this way, the distribution of the multiple oil injection holes 123 can be optimized to avoid the stator winding 22 blocking the oil injection holes 123, improve the oil injection efficiency, and increase the oil injection area, so as to further improve the cooling uniformity of the stator winding 22 by the oil injection ring 10, enhance the cooling effect of the stator winding 22 by the oil injection ring 10, and avoid the generation of hot spots.

[0051] In some embodiments of the present invention, the oil injection hole 123 can also be set on the axial end face of the oil injection ring 10, so that it can be used for bearing cooling at both ends of the rotating shaft, the arrangement of the oil circuit of the end cover can be reduced, and the current end cover oil circuit bearing cooling can be eliminated, thereby realizing a lightweight design of the motor 100.

[0052] Combination Figure 4-Figure 8 As shown, the interlayer ring 12 can mainly include a first interlayer ring 121 and a second interlayer ring 122, there are two first interlayer rings 121, the two first interlayer rings 121 are spaced apart in the radial direction of the main body 11, and the side walls of the two first interlayer rings 121 on the opposite sides are respectively provided with oil injection holes 123, there is at least one second interlayer ring 122 and it is radially spaced apart between the two first interlayer rings 121, and the side walls of the second interlayer ring 122 facing the two first interlayer rings 121 are provided with oil injection holes 123, so that the interlayer rings 12 on both sides of any accommodating space 124 can spray oil into the accommodating space 124 through the oil injection holes 123 provided on the side walls, and the two first interlayer rings 121 are provided to prevent the oil from flowing out from the opposite side of the two first interlayer rings 121, and the oil can be confined in the accommodating space 124, so as to improve the cooling effect of the oil injection ring 10 on the stator winding 22 arranged in the accommodating space 124.

[0053] In some embodiments of the present invention, the oil injection ring 10 is an oil injection ring 10 made of a heat-conducting material, and the oil injection ring 10 is used for heat-conducting cooperation with the stator winding 22 of the motor 100. Specifically, the stator winding 22 of the motor 100 is arranged in the accommodating space 124 of the oil injection ring 10, and the stator winding 22 is directly in contact with the interlayer ring 12, or indirectly in contact with the interlayer ring 12 through oil. By setting the oil injection ring 10 as an oil injection ring 10 made of a heat-conducting material, the oil injection ring 10 can have a better heat conduction effect, and a part of the heat generated by the stator winding 22 can be transferred to the stator core 21 through the oil injection ring 10, and further dissipated through the housing of the motor 100, so that the heat dissipation path of the stator winding 22 can be increased, the heat dissipation effect can be improved, and the temperature of the stator winding 22 can be controlled at a lower level, which can facilitate the motor 100 to select a higher current and achieve a higher torque output.

[0054] Combination Figure 1 , Figure 2 as well as Figure 9-11 As shown, the fuel injection ring 10 of the motor 100 may further include a star point ring 30 and a slip ring 40, wherein the star point ring 30 is used to be electrically connected to the stator winding 22 of the motor 100, and the star point ring 30 and the fuel injection ring 10 are integrally formed structural parts, and the slip ring 40 is used to be electrically connected to the stator winding 22 of the motor 100, and the slip ring 40 and the fuel injection ring 10 are integrally formed structural parts. Specifically, the motor 100 requires additional copper wire lead-out, and by making the fuel injection ring 10 also include the star point ring 30 and the slip ring 40, when the fuel injection ring 10 is assembled on the motor 100, the star point ring 30 can be used to be electrically connected to the star point of the motor 100, and the slip ring 40 can be used to be electrically connected to the three-phase line, thereby ensuring the normal operation of the motor 100.

[0055] In order to ensure the miniaturization of the motor 100, the end space of the motor 100 is limited. Considering that the injection ring, the collector ring and the star point ring are three separate parts in the prior art, the assembly of the parts needs to consider the assembly tolerance, which may easily lead to assembly difficulties. By locating the star point ring 30 and the collector ring 40 in the main body 11, the injection ring 10 is integrated with the star point ring 30 and the collector ring 40 by injection molding, so that the star point ring 30, the collector ring 40 and the injection ring 10 are an integrally formed structural part. In this way, when assembling the motor 100, it is only necessary to assemble the integrally formed structural part composed of the star point ring 30, the collector ring 40 and the injection ring 10 on the motor 100, which can not only improve the integration of the injection ring 10, but also eliminate the need to position and assemble the star point ring 30 and the collector ring 40 again, simplify the assembly process, improve the assembly efficiency, and reduce the assembly error of the star point ring 30 and the collector ring 40, avoid assembly interference or misalignment, and improve the accuracy of assembly.

[0056] In addition, the merge ring 40 and the star-point ring 30 can both be made of flat wires distributed circumferentially, axially distributed between phases, and rounded and expanded at the intersecting parts of the phases. This not only ensures the electrical clearance, but also makes the spatial arrangement of the merge ring 40 and the star-point ring 30 more compact, further improving the structural compactness of the one-piece structural component formed by the injection ring 10, and improving the miniaturization of the motor 100.

[0057] Combination Figure 1 , Figure 2 as well as Figure 7-Figure 11 As shown, the fuel injection ring 10 is provided with a first positioning hole 113 and a second positioning hole 114 which are circumferentially spaced apart, the star-point ring 30 is provided with a first electrical connector 31, the first electrical connector 31 is extended in the axial direction of the fuel injection ring 10 and extends from the first positioning hole 113, the collector ring 40 is provided with a second electrical connector 41, the second electrical connector 41 is extended in the axial direction of the fuel injection ring 10 and extends from the second positioning hole 114, and the first electrical connector 31 and the second electrical connector 41 are both used for electrical connection with the stator winding 22 of the motor 100.

[0058] Specifically, the star-point ring 30 is provided with a first electrical connector 31, and the collector ring 40 is provided with a second electrical connector 41. When assembling the motor 100, the first electrical connector 31 and the second electrical connector 41 need to be electrically connected to the stator winding 22 respectively. By providing a first positioning hole 113 and a second positioning hole 114 circumferentially spaced apart on the injection ring 10, for the integrally formed structural member composed of the star-point ring 30, the collector ring 40 and the injection ring 10, the first electrical connector 31 extends into the first positioning hole 113 and extends out from the first positioning hole 113, and the second electrical connector 41 extends into the second positioning hole 114 and extends out from the second positioning hole 114. Thus, when assembling the motor 100, it is only necessary to extend the electrical connector on the stator winding 22 into the first positioning hole 113 and the second positioning hole 114 respectively, so that the stator winding 22 is electrically connected to the first electrical connector 31 and the second electrical connector 41 respectively. This not only facilitates the electrical connection between the stator winding 22 and the star-point ring 30 and the collector ring 40 respectively, but also realizes the positioning and matching between the stator winding 22 and the one-piece structure formed by the star-point ring 30, the collector ring 40 and the injection ring 10. No additional tooling investment is required, which can make the assembly of the motor 100 simpler and more convenient, and can improve the assembly efficiency of the motor 100.

[0059] Furthermore, combined with Figure 1 , Figure 2 as well as Figure 9-11As shown, the first positioning hole 113 and the second positioning hole 114 are both arranged on an end face of the injection ring 10 in the upper and lower directions, and the first electrical connector 31 and the second electrical connector 41 are both extended in the axial direction of the injection ring 10. Such an arrangement can optimize the arrangement of the first positioning hole 113 and the second positioning hole 114 on the injection ring 10, and can optimize the arrangement of the first electrical connector 31 and the second electrical connector 41 corresponding to the star-point ring 30 and the collector ring 40, so that the star-point ring 30 and the collector ring 40 can be located on the outer periphery of the stator winding 22, which can not only conform to the axial distance between the star-point ring 30 and the collector ring 40 and the first positioning hole 113 or the second positioning hole 114, respectively, and facilitate the positioning and electrical connection of the star-point ring 30 and the collector ring 40 with the stator winding 22, but also reduce the axial length of the motor 100, improve the structural compactness of the motor 100, and improve the miniaturization degree of the motor 100.

[0060] Combination Figure 1 , Figure 2 , Fig. 9 and Fig.11 As shown, a third electrical connector 32 is provided on the star-point ring 30, a fourth electrical connector 42 is provided on the merge ring 40, and a first avoidance hole 115 and a second avoidance hole 116 arranged at circumferential intervals are provided on an end face of one end in the up-down direction of the injection ring 10. The third electrical connector 32 extends from the first avoidance hole 115, and the fourth electrical connector 42 extends from the second avoidance hole 116. Both the third electrical connector 32 and the fourth electrical connector 42 are used for electrical connection with the electronic control components.

[0061] Specifically, the star-point ring 30 and the collector ring 40 also need to be electrically connected to the electronic control component, which can supply power to the motor 100 and control the operation of the motor 100. The third electrical connector 32 on the star-point ring 30 is extended from the first avoidance hole 115, and the fourth electrical connector 42 on the collector ring 40 is extended from the second avoidance hole 116, and the star-point ring 30, the collector ring 40 and the fuel injection ring 10 are set as an integrally formed structural part. In this way, after the motor 100 is assembled, the third electrical connector 32 and the fourth electrical connector 42 can be ensured to be in the correct assembly position relative to the electronic control component, avoiding height error or angle error between the third electrical connector 32 and the fourth electrical connector 42, so that the third electrical connector 32 and the fourth electrical connector 42 can be directly electrically connected to the electronic control component, which can optimize the structural design of the fuel injection ring 10 and even the motor 100 and improve the accuracy of assembly.

[0062] Combination Figure 1-Figure 4As shown, the motor 100 according to the present invention may mainly include: a stator 20 and an oil injection ring 10 of the motor 100, wherein the stator 20 may mainly include: a stator core 21 and a stator winding 22, the stator winding 22 is protrudingly arranged at both ends of the stator core 21, the stator winding 22 is multi-layered, and the multi-layer stator winding 22 is arranged in the radial direction of the stator core 21, the oil injection ring 10 is arranged at at least one end of the stator core 21, and at least one layer of stator winding 22 is arranged in the accommodating space 124 between two adjacent interlayer rings 12.

[0063] Specifically, the stator winding 22 is protruded at both ends of the stator core 21. The stator winding 22 is multi-layered and the multi-layer stator winding 22 is arranged in the radial direction of the stator core 21. The stator winding 22 can be set as a flat wire winding, which can greatly increase the slot fill rate and improve the torque density and power density of the motor 100. The oil injection ring 10 is set at at least one end of the stator core 21, so that the oil injection ring 10 can cool the stator winding 22 at at least one end of the stator core 21, thereby improving the uneven temperature of the stator winding 22 and improving the heat dissipation efficiency.

[0064] Furthermore, the interlayer ring 12 is embedded in the gap between the layers of the stator winding 22, so that at least one layer of stator winding 22 is provided in the accommodation space 124 between two adjacent interlayer rings 12, so that the two adjacent interlayer rings 12 can spray oil to the stator winding 22 in the accommodation space 124 through the oil injection hole 123, so that the stator winding 22 in the accommodation space 124 can be uniformly dissipated. And because each of the multiple accommodation spaces 124 is provided with at least one layer of stator winding 22, the oil injection ring 10 can achieve layered cooling of the stator winding 22, which can not only make the cooling more comprehensive, but also improve the cooling effect, thereby improving the working performance of the motor 100 and facilitating the subsequent high power density design of the motor 100. Among them, the layers between the stator winding 22 can be widened to facilitate the embedding of the interlayer ring 12.

[0065] In some embodiments of the present invention, two layers of stator windings 22 can be arranged in the accommodating space 124 between two adjacent interlayer rings 12, and the interlayer rings 12 on both sides of any accommodating space 124 can spray oil into the accommodating space 124 through the oil spray holes 123 arranged on the side walls. In this way, cooling and heat dissipation of each layer of stator windings 22 can be achieved, thereby effectively avoiding the generation of hot spots and effectively improving the working performance of the motor 100.

[0066] Combination Figure 1 , Figure 2 , Fig.10 and Fig.11As shown, the fuel injection ring 10 is provided with a first positioning hole 113 and a second positioning hole 114, and the fuel injection ring 10 includes a star-point ring 30 and a collector ring 40, the star-point ring 30 is provided with a first electrical connector 31, the collector ring 40 is provided with a second electrical connector 41, the stator winding 22 is provided with a fifth electrical connector 221 and a sixth electrical connector 222, the fifth electrical connector 221 and the sixth electrical connector 222 are both extended in the axial direction of the stator winding 22, the first electrical connector 31 and the fifth electrical connector 221 are both extended from the first positioning hole 113 and are electrically connected to each other, the second electrical connector 41 and the sixth electrical connector 222 are both extended from the second positioning hole 114 and are electrically connected to each other.

[0067] Specifically, by arranging the fifth electrical connector 221 and the sixth electrical connector 222 on the stator winding 22, the fifth electrical connector 221 and the sixth electrical connector 222 are both extended in the axial direction of the stator winding 22, so that the fifth electrical connector 221 and the sixth electrical connector 222 can conform to the axial distance between the stator winding 22 and the first positioning hole 113 or the second positioning hole 114. When assembling the motor 100 and making the injection ring 10 match the stator 20, the fifth electrical connector 221 can extend into the first positioning hole 113, and the sixth electrical connector 222 can extend into the second positioning hole 114. It is only necessary to make the first electrical connector By electrically connecting the second electrical connector 41 and the sixth electrical connector 222, the star point of the motor 100 can be led out, thereby realizing the electrical connection between the stator winding 22 and the star point ring 30 and the collector ring 40 respectively. Under the premise of ensuring the normal operation of the motor 100, the positioning and matching between the one-piece structural parts composed of the star point ring 30, the collector ring 40 and the injection ring 10 and the stator 20 can be realized without the need for additional tooling investment, which can make the assembly of the motor 100 simpler and more convenient, and can improve the assembly efficiency of the motor 100.

[0068] Combination Figure 3-Figure 10 As shown, a first oil inlet 211 and a first oil outlet 212 are provided on the stator core 21, and the first oil inlet 211 is connected to the first oil outlet 212. A second oil inlet 111 is provided on the injection ring 10, and the second oil inlet 111 is connected to the first oil outlet 212, and the injection hole 123 is connected to the second oil inlet 111.

[0069] Specifically, the stator core 21 also needs to dissipate heat during operation. A first oil inlet 211 and a first oil outlet 212 are provided on the stator core 21. The first oil inlet 211 is connected to the first oil outlet 212, so that the oil can enter the oil channel in the stator core 21 through the first oil inlet 211, and then flow out from the first oil outlet 212 to achieve cooling and heat dissipation of the stator core 21. By providing a second oil inlet 111 on the injection ring 10, the second oil inlet 111 is connected to the first oil outlet 212, and the injection hole 123 is connected to the second oil inlet 111, so that By using the oil channel of the stator core 21, the oil can flow into the oil injection ring 10 from the second oil inlet 111 after flowing out from the first oil outlet 212, and further enter the interlayer ring 12, and be sprayed out from the oil injection hole 123 of the interlayer ring 12 to cool the stator winding 22. Then the oil naturally flows out of the oil injection ring 10 to reach the bottom of the motor 100 housing, and then completes a cooling cycle through the oil pump. Therefore, while improving the heat dissipation efficiency of the motor 100 and the working performance of the motor 100, the structural design of the motor 100 can be simplified, making the structure of the motor 100 simpler and more compact.

[0070] Furthermore, combined with Figure 3-Figure 10 As shown, the first oil inlet 211 is located on the circumferential outer wall of the stator core 21 , a first oil outlet 212 is provided on the side of the stator core 21 facing the oil injection ring 10 , and a second oil inlet 111 is provided on the side of the oil injection ring 10 facing the stator core 21 .

[0071] Specifically, the axial ends of the oil injection ring 10 and the stator core 21 are abutted against each other, and the first oil inlet 211 is located on the circumferential outer wall of the stator core 21, and a first oil outlet 212 is provided on the side of the stator core 21 facing the oil injection ring 10, and a second oil inlet 111 is provided on the side of the oil injection ring 10 facing the stator core 21, so that the oil can enter the stator core 21 through the first oil inlet 211, and flow in the oil channel of the stator core 21 to the first oil outlet 212 at the upper and lower ends, and then continue to flow directly through the second oil inlet 111 to the oil injection ring 10, so that the flow path of the oil can be made simpler and more direct, the flow path of the oil can be shortened, the pump work can be reduced, and the injection efficiency can be improved.

[0072] Combination Figure 3 , Figure 5 , Figure 7 and Fig.10 As shown, the stator core 21 is provided with a plug-in groove 213, and the injection ring 10 is provided with a plug-in protrusion 112. The plug-in groove 213 and the plug-in protrusion 112 are plug-fitted together, the first oil outlet 212 is provided at the plug-in groove 213, and the second oil inlet 111 is provided at the plug-in protrusion 112. The first oil outlet 212 and the second oil inlet 111 are arranged opposite to each other and are connected to each other.

[0073] Specifically, by setting a plug-in groove 213 in the stator core 21 and setting a plug-in protrusion 112 on the fuel injection ring 10, when assembling the motor 100, it is only necessary to make the plug-in protrusion 112 extend into the plug-in groove 213 and make the plug-in protrusion 112 and the plug-in groove 213 correspondingly plug-fitted, so as to achieve the positioning between the stator core 21 and the fuel injection ring 10 without the need for additional tooling investment, thereby making the assembly of the motor 100 simpler and more convenient and improving the assembly efficiency of the motor 100.

[0074] Furthermore, the first oil outlet 212 is arranged in the plug-in groove 213, and the second oil inlet 111 is arranged in the plug-in protrusion 112, and the first oil outlet 212 and the second oil inlet 111 are arranged relative to each other. In this way, after the plug-in groove 213 and the plug-in protrusion 112 are plugged into each other, the first oil outlet 212 and the second oil inlet 111 can be connected to each other, and the oil can flow from the stator core 21 to the injection ring 10, thereby improving the assembly efficiency of the motor 100 and ensuring the normal flow of the oil. It not only simplifies the structural design of the motor 100, but also prevents the oil from leaking from the connection between the first oil outlet 212 and the second oil inlet 111, and can reduce the flatness requirements of the mounting surface.

[0075] Combination Figure 5 , Figure 7 and Fig.10 As shown, there are multiple plug-in grooves 213, which are spaced apart in the circumferential direction of the stator core 21; there are multiple plug-in protrusions 112, which are spaced apart in the circumferential direction of the injection ring 10; and the multiple plug-in protrusions 112 correspond one to one to the multiple plug-in grooves 213.

[0076] Specifically, by setting the plug-in groove 213 to be multiple, and making the multiple plug-in grooves 213 spaced apart in the circumferential direction of the stator core 21, that is, setting the first oil outlet 212 to be multiple, and the multiple first oil outlets 212 are spaced apart in the circumferential direction of the stator core 21, the oil inside the stator core 21 can flow out through the multiple first oil outlets 212, and by setting the plug-in protrusion 112 to be multiple, and the multiple plug-in protrusions 112 are spaced apart in the circumferential direction of the oil injection ring 10, that is, setting the second oil inlet 111 to be multiple, and the multiple second oil inlet 111 are spaced apart in the circumferential direction of the oil injection ring 10, and by making the multiple plug-in protrusions 112 and the multiple plug-in grooves 213 correspond one to one, that is, the multiple first oil outlets 212 and the multiple second oil inlets 111 correspond one to one, so that on the one hand, the accurate limiting between the stator 20 and the oil injection ring 10 can be achieved through the corresponding plug-in cooperation of the multiple plug-in protrusions 112 and the multiple plug-in grooves 213, and the speed and accuracy of assembly between the stator 20 and the oil injection ring 10 are further improved. On the other hand, the multiple first oil outlets 212 and the multiple second oil inlets 111 are correspondingly connected, so that the oil can be evenly distributed on the circumference of the oil injection ring 10, and then the oil can be evenly sprayed to various circumferential parts of the stator winding 22, so that the oil injection ring 10 can cool the stator winding 22 more comprehensively.

[0077] The powertrain according to the present invention may mainly include: the above-mentioned motor 100. Specifically, by applying the motor 100 to the powertrain, since the motor 100 has a better cooling effect and a higher integration, it is convenient to design and modify the powertrain solution, which not only enables the powertrain to use a higher current, achieve a higher torque output, and achieve a high speed and high power density of the powertrain, but also improves the production efficiency of the powertrain, and improves the structural compactness and integration of the powertrain.

[0078] The vehicle according to the present invention may mainly include: the above-mentioned powertrain. Specifically, by applying the powertrain to the vehicle, not only the driving performance of the vehicle can be improved, but also the production cost of the vehicle can be reduced and the production efficiency can be improved, thereby improving the product competitiveness of the vehicle and improving the user experience.

[0079] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0080] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0081] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An oil injection ring of a motor, characterized in that: include: Main body (11); An interlayer ring (12), wherein the interlayer ring (12) is arranged on one side of the main body (11) and is in plurality, wherein the plurality of interlayer rings (12) are concentrically arranged in the radial direction of the main body (11), and an accommodation space (124) is arranged between two adjacent interlayer rings (12), wherein the accommodation space (124) is used to accommodate the stator winding (22) of the motor, and an oil injection hole (123) is arranged on the side wall of the interlayer ring (12) facing the accommodation space (124).

2. The oil injection ring of the motor according to claim 1, characterized in that: There are a plurality of oil injection holes (123), and the plurality of oil injection holes (123) are circumferentially spaced apart on the side wall of the interlayer ring (12) to correspond to the gaps of the stator winding (22) of the motor.

3. The oil injection ring of the motor according to claim 1, characterized in that: The interlayer ring (12) comprises a first interlayer ring (121) and a second interlayer ring (122), wherein there are two first interlayer rings (121), the two first interlayer rings (121) are arranged at intervals in the radial direction of the main body (11), and the oil injection holes (123) are respectively arranged on the side walls on the opposite sides of the two first interlayer rings (121), and there is at least one second interlayer ring (122) which is arranged at intervals in the radial direction between the two first interlayer rings (121), and the oil injection holes (123) are both arranged on the side walls of the second interlayer ring (122) facing the two first interlayer rings (121).

4. The oil injection ring of the motor according to claim 1, characterized in that: The oil injection ring (10) is an oil injection ring (10) made of a heat-conducting material, and the oil injection ring (10) is used for heat-conducting cooperation with the stator winding (22) of the motor (100).

5. The oil injection ring of the motor according to claim 1, characterized in that: It also includes a star point ring (30), the star point ring (30) being used to be electrically connected to the stator winding (22) of the motor (100), and the star point ring (30) and the fuel injection ring (10) being an integrally formed structural component.

6. The oil injection ring of the motor according to claim 5, characterized in that: It also includes a slip ring (40), the slip ring (40) being used to be electrically connected to the stator winding (22) of the motor (100), and the slip ring (40) and the oil injection ring (10) being integrally formed structural parts.

7. The oil injection ring of the motor according to claim 6, characterized in that: The fuel injection ring (10) is provided with a first positioning hole (113) and a second positioning hole (114) which are arranged at intervals in the circumferential direction; the star point ring (30) is provided with a first electrical connector (31), the first electrical connector (31) is extended in the axial direction of the fuel injection ring (10) and extends from the first positioning hole (113); the collector ring (40) is provided with a second electrical connector (41), the second electrical connector (41) is extended in the axial direction of the fuel injection ring (10) and extends from the second positioning hole (114); the first electrical connector (31) and the second electrical connector (41) are both used for electrically connecting to the stator winding (22) of the motor (100).

8. The oil injection ring of the motor according to claim 7, characterized in that: The star point ring (30) is provided with a third electrical connector (32), the collector ring (40) is provided with a fourth electrical connector (42), and the end surface of one end of the fuel injection ring (10) is provided with a first avoidance hole (115) and a second avoidance hole (116) which are arranged at intervals in the circumferential direction. The third electrical connector (32) extends from the first avoidance hole (115), and the fourth electrical connector (42) extends from the second avoidance hole (116). Both the third electrical connector (32) and the fourth electrical connector (42) are used for being electrically connected to an electric control component.

9. A motor, characterized in that: include: A stator (20), the stator (20) comprising: a stator core (21) and a stator winding (22), the stator winding (22) being protrudingly arranged at two ends of the stator core (21), the stator winding (22) being multi-layered, and the multi-layered stator winding (22) being arranged in the radial direction of the stator core (21); The oil injection ring (10) of the motor (100) according to any one of claims 1 to 8, wherein the oil injection ring (10) is arranged at at least one end of the stator core (21), and at least one layer of the stator winding (22) is arranged in the accommodating space (124) between two adjacent interlayer rings (12).

10. The motor according to claim 9, wherein the fuel injection ring (10) is provided with a first positioning hole (113) and a second positioning hole (114), the fuel injection ring (10) comprises a star point ring (30) and a collector ring (40), the star point ring (30) is provided with a first electrical connector (31), the collector ring (40) is provided with a second electrical connector (41), the stator winding (22) is provided with a fifth electrical connector (221) and a sixth electrical connector (222), the fifth electrical connector (221) and the sixth electrical connector (222) are both extended in the axial direction of the stator winding (22), the first electrical connector (31) and the fifth electrical connector (221) are both extended from the first positioning hole (113) and are electrically connected to each other, the second electrical connector (41) and the sixth electrical connector (222) are both extended from the second positioning hole (114) and are electrically connected to each other.

11. The motor according to claim 9, characterized in that The stator core (21) is provided with a first oil inlet (211) and a first oil outlet (212), the first oil inlet (211) being connected to the first oil outlet (212), the oil injection ring (10) is provided with a second oil inlet (111), the second oil inlet (111) being connected to the first oil outlet (212), and the oil injection hole (123) being connected to the second oil inlet (111).

12. The motor according to claim 11, characterized in that The first oil inlet (211) is located on the circumferential outer wall of the stator core (21), the first oil outlet (212) is provided on the side of the stator core (21) facing the oil injection ring (10), and the second oil inlet (111) is provided on the side of the oil injection ring (10) facing the stator core (21).

13. The motor according to claim 12, characterized in that The stator core (21) is provided with a plug-in groove (213), the oil injection ring (10) is provided with a plug-in protrusion (112), the plug-in groove (213) and the plug-in protrusion (112) are plug-fitted, the first oil outlet (212) is provided at the plug-in groove (213), the second oil inlet (111) is provided at the plug-in protrusion (112), and the first oil outlet (212) and the second oil inlet (111) are arranged opposite to each other and are connected to each other.

14. The motor according to claim 13, characterized in that There are a plurality of the insertion grooves (213), and the plurality of the insertion grooves (213) are arranged at intervals in the circumferential direction of the stator core (21); there are a plurality of the insertion protrusions (112), and the plurality of the insertion protrusions (112) are arranged at intervals in the circumferential direction of the oil injection ring (10); and the plurality of the insertion protrusions (112) and the plurality of the insertion grooves (213) correspond one to one.

15. A powertrain, characterized in that: include: The electric machine (100) according to any one of claims 9 to 14.

16. A vehicle, characterized in that: include: The powertrain of claim 15.

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