Motor and vehicle having the same

Abstract

The present invention relates to the field of electric motors and discloses an electric motor and a vehicle having the same. The electric motor comprises: a rotating shaft, a first oil passage is formed on the rotating shaft, the first oil passage has a first oil outlet and a second oil outlet at two ends in the axial direction; an iron core assembly, the iron core assembly is sleeved on the outer periphery of the rotating shaft, and a second oil passage connected to the first oil outlet and a third oil passage connected to the second oil outlet are formed inside the iron core assembly; wherein at least part of the second oil passage extends axially, at least part of the third oil passage extends axially, and the cooling medium in the second oil passage and the third oil passage flows in opposite directions. According to the electric motor of the present invention, a second oil passage connected to the first oil outlet and a third oil passage connected to the second oil outlet are formed inside the iron core assembly, and the cooling medium in the second oil passage and the third oil passage flows in opposite directions, thereby increasing the contact area and contact time between the cooling medium and the iron core assembly, thereby improving the cooling effect of the iron core assembly regardless of low or high speed.

Description

Technical Field

[0001] The present invention relates to the field of motors, and in particular to a motor and a vehicle having the same. Background Art

[0002] In the related art, an oil cooling structure scheme adopted by most current motor designs, which is disclosed in Chinese patent No. CN115664076A, introduces a cooling medium into the inside of the rotating shaft, and splashes the oil through the radial oil holes on the rotating shaft to lubricate the bearings and cool the ends of the windings. Since this structure relies on the centrifugal force generated by the rotation of the rotor to throw out the cooling medium, the cooling effect on the rotor core and the windings inside the rotor core is poor at low speeds; another oil cooling scheme, which is disclosed in Chinese patent No. CN116032044A, throws the cooling medium into the end plates on both sides through the oil holes set on the rotor, and then splashes the cooling medium onto the windings and bearings through the oil holes on the end plates. Since the oil holes on the top of the end plates are closer to the windings, the oil splashing distance is shorter, and the cooling effect is better at low speeds. However, for the rotor core and the rotor core magnets, they are only indirectly cooled through the contact between the rotating shaft-core-end plate, and the cooling effect on the magnets is poor. If the magnets are in a high-temperature working state, there is a risk of irreversible demagnetization, which may cause the motor performance to be reduced or even unable to work normally. Summary of the invention

[0003] 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 a motor. According to the motor of the present invention, a second oil passage connected to a first oil outlet and a third oil passage connected to a second oil outlet are formed inside the core assembly, and the cooling medium in the second oil passage and the third oil passage flow in opposite directions, thereby increasing the contact area and contact time between the cooling medium and the core assembly, thereby improving the cooling effect of the core assembly at both low and high speeds.

[0004] The motor according to the present invention comprises: a rotating shaft, on which a first oil passage is formed, the first oil passage has a first oil outlet and a second oil outlet respectively arranged at two ends of the rotating shaft in the axial direction; an iron core assembly, the iron core assembly is sleeved on the outer circumference of the rotating shaft, and a second oil passage connected to the first oil outlet and a third oil passage connected to the second oil outlet are formed inside the iron core assembly; wherein at least a portion of the second oil passage extends axially, at least a portion of the third oil passage extends axially, and the cooling medium in the second oil passage and the third oil passage flows in opposite directions.

[0005] The motor according to the present invention is respectively provided with a first oil outlet and a second oil outlet at both ends of the rotating shaft in the axial direction, and a second oil channel connected with the first oil outlet and a third oil channel connected with the second oil outlet are formed inside the core assembly. The cooling medium in the rotating shaft can flow into the second oil channel through the first oil outlet and flow into the third oil channel through the second oil outlet to cool the core assembly. Since the cooling medium in the second oil channel and the third oil channel flows in opposite directions, the cooling medium circulates between different oil channels, increasing the contact area and contact time between the cooling medium and the core assembly, thereby improving the cooling effect of the core assembly regardless of whether it is at a low speed or a high speed.

[0006] According to some embodiments of the present invention, the core assembly includes: a rotor core, the rotor core is sleeved on the outer circumference of the rotating shaft, a first flow channel and a second flow channel extending in the axial direction are formed in the rotor core, and a magnetic steel groove is formed on the rotor core; a first end plate, the first end plate is arranged at one end of the rotating shaft in the axial direction, a first oil groove connected to the first oil outlet and a second oil groove connected to the second flow channel are formed on the first end plate, and the second oil groove is arranged opposite to the magnetic steel groove; a second end plate, the second end plate is arranged at the other end of the rotating shaft in the axial direction, a third oil groove connected to the second oil outlet and a fourth oil groove connected to the first flow channel are formed on the second end plate, and the fourth oil groove is arranged opposite to the magnetic steel groove; wherein the first flow channel connects the first oil groove with the fourth oil groove, the second flow channel connects the third oil groove with the second oil groove, the first oil groove, the first flow channel and the fourth oil groove jointly define the first oil channel, and the second oil groove, the second flow channel and the third oil groove jointly define the second oil channel.

[0007] According to some embodiments of the present invention, the first oil grooves are configured as a plurality of groups, and the third oil grooves are configured as a plurality of groups arranged corresponding to the first oil grooves.

[0008] According to some embodiments of the present invention, the first oil grooves are configured as three groups arranged sequentially along the circumference of the rotating shaft, and the third oil grooves are configured as three groups arranged sequentially along the circumference of the rotating shaft.

[0009] According to some embodiments of the present invention, the first oil groove includes: a first oil section, the first oil section is connected to the first oil outlet, and the first oil section extends radially along the first end plate; a second oil section, the second oil section is connected to the first oil section, and the second oil section extends circumferentially toward the radial outside of the first end plate; the third oil groove includes: a third oil section, the third oil section is connected to the second oil outlet, and the third oil section extends radially along the second end plate; a fourth oil section, the fourth oil section is connected to the third oil section, and the fourth oil section extends circumferentially toward the radial outside of the second end plate.

[0010] According to some embodiments of the present invention, the second oil segment and the fourth oil segment extend in opposite directions.

[0011] According to some embodiments of the present invention, a first oil circuit and a second oil circuit that are connected to each other are formed on the first end plate, the first oil circuit is connected to the second flow channel and extends radially, the second oil circuit extends circumferentially, wherein the first oil circuit and the second oil circuit are configured as the second oil groove; a third oil circuit and a fourth oil circuit that are connected to each other are formed on the second end plate, the third oil circuit is connected to the first flow channel and extends radially, the fourth oil circuit extends circumferentially, wherein the third oil circuit and the fourth oil circuit are configured as the fourth oil groove.

[0012] According to some embodiments of the present invention, a first oil outlet hole and a second oil outlet hole extending away from each other in the axial direction are respectively formed in the second oil passage and the fourth oil passage.

[0013] According to some embodiments of the present invention, the first oil circuit is constructed as a plurality of intervals between each other and located on the inner periphery of the second oil circuit, and the first oil outlet hole is provided between two adjacent first oil circuits; the third oil circuit is constructed as a plurality of intervals between each other and located on the inner periphery of the fourth oil circuit, and the second oil outlet hole is provided between two adjacent third oil circuits.

[0014] According to some embodiments of the present invention, the rotor core is formed by stacking a plurality of rotor punchings, each of which is formed with an oil injection hole, and the plurality of oil injection holes are arranged in sequence in the axial direction to define the first flow channel and / or the second flow channel.

[0015] According to some embodiments of the present invention, two adjacent groups of the magnetic steel slots are symmetrically arranged about the first axis, and each group of the magnetic steel slots is symmetrically arranged about the second axis, and the rotor core includes: a first core segment, a first oil hole is formed on the first core segment, and the center of the first oil hole is circumferentially located on the counterclockwise side of the first axis; a second core segment, a second oil hole is formed on the second core segment, and the center of the second oil hole is arranged on the first axis; a third core segment, a third oil hole is formed on the third core segment, and the center of the third oil hole is circumferentially located on the clockwise side of the first axis, wherein the first core segment, the second core segment and the third core segment are constructed as a group or multiple groups arranged in sequence in the thickness direction.

[0016] According to some embodiments of the present invention, a mounting hole suitable for the rotating shaft to pass through is formed on the rotor core, and a positioning groove is formed at the edge of the mounting hole. The positioning groove is located between the adjacent first axis and the second axis, and the first axis and the second axis are symmetrically arranged about the positioning groove.

[0017] The vehicle according to the present invention will be briefly described below.

[0018] The vehicle according to the present invention is provided with a motor as described in any one of the above embodiments. Since the vehicle according to the present invention is provided with a motor as described in any one of the above embodiments, the heat dissipation performance of the vehicle during operation according to the present application is better, thereby improving the stability and reliability of the vehicle during operation.

[0019] 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

[0020] 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:

[0021] Figure 1 is a schematic diagram of the assembly of a core assembly and a rotating shaft according to an embodiment of the present invention;

[0022] Figure 2 is a schematic structural diagram of a first core segment according to an embodiment of the present invention;

[0023] Figure 3 is a schematic structural diagram of a second core segment according to an embodiment of the present invention;

[0024] Figure 4 is a schematic structural diagram of a third core segment according to an embodiment of the present invention;

[0025] Figure 5is a cross-sectional view of a first end plate according to one embodiment of the present invention;

[0026] Figure 6 is a schematic diagram of cooperation between a first end plate and an end surface of a rotor core according to an embodiment of the present invention;

[0027] Figure 7 is a schematic diagram of cooperation between a second end plate and an end surface of a rotor core according to an embodiment of the present invention;

[0028] Figure 8 is a schematic diagram of a cooling medium flow oil circuit according to an embodiment of the present invention;

[0029] Fig. 9 is a schematic diagram of a first end plate structure according to an embodiment of the present invention;

[0030] Fig.10 It is a schematic diagram of the second end plate structure according to an embodiment of the present invention.

[0031] Reference numerals:

[0032] 100. Motor;

[0033] 200, rotating shaft; 2020, first oil outlet; 2021, second oil outlet;

[0034] 111, magnetic steel slot; 112, first core segment; 113, second core segment;

[0035] 114, third core segment; 101, first flow channel; 102, second flow channel; 103, first oil hole;

[0036] 104, second oil hole; 105, third oil hole;

[0037] 21. first end plate; 22. first oil section; 23. second oil section; 24. first oil circuit;

[0038] 25. Second oil circuit; 201. First oil outlet hole;

[0039] 31. Second end plate; 32. Third oil section; 33. Fourth oil section; 34. Third oil circuit;

[0040] 35, fourth oil circuit; 202, second oil outlet hole;

[0041] 41. First axis; 42. Second axis; 43. Lightening hole; 44. Positioning groove. DETAILED DESCRIPTION

[0042] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0043] In the related art, an oil cooling structure scheme adopted by most current motor designs, which is disclosed in Chinese patent No. CN115664076A, adopts the method of introducing cooling medium into the rotating shaft, and splashing lubricating bearings and cooling the inner side of winding ends through radial oil holes on the rotating shaft. Since this structure relies on the centrifugal force generated by the rotation of the rotor to throw out the cooling medium, the cooling effect on the rotor core and the winding inside the rotor core is poor at low speeds; another oil cooling scheme, which is disclosed in Chinese patent No. CN116032044A, is that the cooling medium is thrown into the end plates on both sides through the oil holes set on the rotor, and then splashed onto the windings and bearings through the oil holes on the end plates. Since the oil holes on the top of the end plates are closer to the windings, the oil splashing distance is shorter, and the cooling effect is better at low speeds. However, for the rotor core and the rotor core magnet, it is only indirectly cooled through the contact between the rotating shaft-core-end plate, and the cooling effect on the magnet is poor. If the magnet is in a high-temperature working state, there is a risk of irreversible demagnetization, which may cause the motor performance to be reduced or even unable to work normally.

[0044] Reference below Figure 1-Figure 10 A motor according to an embodiment of the present invention is described.

[0045] The motor 100 according to the present invention comprises: a rotating shaft 200 and an iron core assembly, wherein a first oil passage is formed on the rotating shaft 200, and the first oil passage has a first oil outlet 2020 and a second oil outlet 2021 at both ends in the axial direction; the iron core assembly is sleeved on the outer circumference of the rotating shaft 200, and a second oil passage connected to the first oil outlet 2020 and a third oil passage connected to the second oil outlet 2021 are formed inside the iron core assembly; wherein at least a portion of the second oil passage extends axially, and at least a portion of the third oil passage extends axially, and the cooling medium in the second oil passage and the third oil passage flows in opposite directions.

[0046] In some specific embodiments, a rotor assembly is provided in the motor 100, and the rotor assembly is composed of a rotating shaft 200 and an iron core assembly. A first oil passage is formed on the rotating shaft 200, and a first oil outlet 2020 of the first oil passage is formed on an end surface of one end of the rotating shaft 200 in the axial direction, and a second oil outlet 2021 of the first oil passage is formed on an end surface of the other end of the rotating shaft 200 in the axial direction. The outer periphery of the rotating shaft 200 is sleeved with an iron core assembly, and a second oil passage and a third oil passage are formed in the iron core assembly, and at least a portion of the second oil passage extends in the axial direction, and at least a portion of the second oil passage extends in the axial direction. The second oil passage is connected to the first oil outlet 2020, and the third oil passage is connected to the second oil outlet 2021. The cooling medium in the rotating shaft 200 can flow into the second oil passage through the first oil outlet 2020 and flow into the third oil passage through the second oil outlet 2021 to cool the core assembly. Since the cooling medium in the second oil passage and the third oil passage flows in opposite directions, the cooling medium circulates between different oil passages, increasing the contact area and contact time between the cooling medium and the core assembly, thereby improving the cooling effect of the core assembly regardless of whether it is at a low speed or a high speed.

[0047] According to the motor 100 of the present invention, the first oil outlet 2020 of the rotating shaft 200 is connected with the second oil channel of the core assembly, and the second oil outlet 2021 of the rotating shaft 200 is connected with the third oil channel of the core assembly. The flow directions of the cooling medium in the second oil channel and the third oil channel are opposite, thereby increasing the contact area and contact time between the cooling medium and the core assembly, thereby improving the cooling effect of the core assembly.

[0048] According to some embodiments of the present invention, the core assembly includes: a rotor core, a first end plate 21 and a second end plate 31, the rotor core is sleeved on the outer periphery of the rotating shaft 200, a first flow channel 101 and a second flow channel 102 extending in the axial direction are formed in the rotor core, and a magnetic steel groove 111 is formed on the rotor core; the first end plate 21 is arranged at one end of the rotating shaft 200 in the axial direction, a first oil groove communicating with the first oil outlet 2020 and a second oil groove communicating with the second flow channel 102 are formed on the first end plate 21, and the second oil groove is arranged opposite to the magnetic steel groove 111; The second end plate 31 is arranged at the other end of the rotating shaft 200 in the axial direction, and a third oil groove connected to the second oil outlet 2021 and a fourth oil groove connected to the first flow channel 101 are formed on the second end plate 31, and the fourth oil groove is arranged opposite to the magnetic steel groove 111; wherein the first flow channel 101 connects the first oil groove with the fourth oil groove, and the second flow channel 102 connects the third oil groove with the second oil groove, the first oil groove, the first flow channel 101 and the fourth oil groove jointly define the first oil channel, and the second oil groove, the second flow channel 102 and the third oil groove jointly define the second oil channel.

[0049] In some specific embodiments, the core assembly is composed of a rotor core, a first end plate 21 and a second end plate 31. The rotor core is sleeved on at least a portion of the outer circumference of the rotating shaft 200. A first flow channel 101 and a second flow channel 102 are formed in the rotor core. The first flow channel 101 and the second flow channel 102 respectively penetrate the rotor core in the axial direction. The rotor core is provided with a plurality of groups of magnetic steel slots 111. The magnetic steel is accommodated in the magnetic steel slots 111. The first flow channel 101 and the second flow channel 102 are respectively arranged between two adjacent groups of magnetic steel slots 111.

[0050] The first end plate 21 and the second end plate 31 are respectively sleeved on both ends of the rotating shaft 200 in the axial direction, and the first end plate 21 and the second end plate 31 are arranged opposite to each other. A first oil groove is formed in the first end plate 21, and the first oil groove is communicated with the first oil outlet 2020 and the first flow channel 101 respectively. The cooling medium in the rotating shaft 200 can flow into the first oil groove from the first oil outlet 2020, and then flow into the first flow channel 101 from the first oil groove. The cooling medium can exchange heat with the rotor core and the magnetic steel inside the rotor core in the first flow channel 101, so as to realize cooling of the rotor core and the magnetic steel inside the rotor core;

[0051] A third oil groove is formed in the second end plate 31, and the third oil groove is communicated with the second oil outlet 2021 and the second flow channel 102 respectively. The cooling medium in the rotating shaft 200 can flow into the third oil groove from the second oil outlet 2021, and then flow into the second flow channel 102 from the third oil groove. The cooling medium can exchange heat with the rotor core and the magnetic steel inside the rotor core in the second flow channel 102, further improving the cooling effect on the rotor core and the magnetic steel inside the rotor core.

[0052] A second oil groove connected to the second flow channel 102 is also formed on the first end plate 21. The second oil groove is arranged opposite to the magnetic steel groove 111 at one end of the rotor core in the axial direction and covers the magnetic steel groove 111. The cooling medium can flow into the second oil groove through the second flow channel 102 to cool the magnetic steel at the end of the rotor core, further improving the cooling effect on the magnetic steel of the rotor core; a fourth oil groove connected to the first flow channel 101 is also formed on the second end plate 31. The fourth oil groove is arranged opposite to the magnetic steel groove 111 at the other end of the rotor core in the axial direction and covers the magnetic steel groove 111. The cooling medium can flow into the fourth oil groove through the first flow channel 101 to cool the magnetic steel at the end of the rotor core, further improving the cooling effect on the magnetic steel of the rotor core.

[0053] According to some embodiments of the present invention, the first oil grooves are constructed as multiple groups, and the third oil grooves are constructed as multiple groups corresponding to the first oil grooves. The design number of the first oil grooves and the third oil grooves is determined by the number of the first flow channels 101 and the second flow channels 102. The number of the first oil grooves is consistent with the number of the first flow channels 101, and the number of the third oil grooves is consistent with the number of the second flow channels 102, ensuring that the cooling medium is guided by corresponding first oil grooves and third oil grooves in each of the first flow channels 101 and the second flow channels 102. At the same time, multiple groups of first oil grooves are arranged on the first end plate 21 and multiple groups of third oil grooves are arranged on the second end plate 31, which can increase the contact area between the cooling medium and the end face of the rotor core, thereby improving the cooling effect on the rotor core.

[0054] According to some embodiments of the present invention, the first oil grooves are configured as three groups arranged sequentially along the circumference of the rotating shaft, and the third oil grooves are configured as three groups arranged sequentially along the circumference of the rotating shaft.

[0055] In some specific embodiments, the first oil grooves in the present application are constructed as three groups arranged in sequence along the circumference of the rotating shaft on the first end plate 21, and the third oil grooves are constructed as three groups arranged in sequence along the circumference of the rotating shaft on the second end plate 31. The three groups of first oil grooves are respectively connected to their corresponding first flow channels 101, and the three groups of third oil grooves are respectively connected to their corresponding second flow channels 102, ensuring that the cooling medium can flow along multiple paths between the first end plate 21 and the rotor core, between the second end plate 31 and the rotor core, and form symmetrical cooling paths at both ends of the rotor core, thereby improving the cooling effect on the rotor core.

[0056] According to some embodiments of the present invention, the first oil groove includes: a first oil section 22 and a second oil section 23, the first oil section 22 is connected to the first oil outlet 2020, and the first oil section 22 extends radially along the first end plate 21; the second oil section 23 is connected to the first oil section 22, and the second oil section 23 extends obliquely along the circumferential direction toward the radial outside of the first end plate 21; the third oil groove includes: a third oil section 32 and a fourth oil section 33, the third oil section 32 is connected to the second oil outlet 2021, and the third oil section 32 extends radially along the second end plate 31; the fourth oil section 33 is connected to the third oil section 32, and the fourth oil section 33 extends obliquely along the circumferential direction toward the radial outside of the second end plate 31.

[0057] In some specific embodiments, a weight-reducing hole 43 is further provided on the rotor core. The weight-reducing hole 43 is provided between two adjacent groups of magnetic steel grooves 111 and is located radially inward of the first oil passage or the second oil passage. The first oil groove is composed of a first oil section 22 and a second oil section 23. One end of the first oil section 22 is connected to the first oil outlet 2020, and the other end of the first oil section 22 is connected to one end of the second oil section 23. The other end of the second oil section 23 is connected to the first oil passage, so that the cooling medium is guided from the rotating shaft 200 to the rotor core through the first oil section 22 and the second oil section 23, ensuring that the cooling medium can be directly The first oil section 22 is in direct contact with the rotor core, thereby improving the cooling effect on the rotor core. The first oil section 22 extends obliquely along the radial direction of the first end plate 21, and the second oil section 23 extends obliquely toward the radial outer side of the first end plate 21 along the circumferential direction, so that an angle is formed between the first oil section 22 and the second oil section 23, and the angle can be preferably set to 90°. A weight-reducing hole 43 is provided between the first oil section 22 and the second oil section 23, so that the first oil groove can avoid the weight-reducing hole 43 from the path, so as to avoid the cooling medium from entering the weight-reducing hole 43, and prevent the cooling medium from accumulating in the weight-reducing hole 43 to cause additional mechanical loss;

[0058] The third oil groove is composed of a third oil section 32 and a fourth oil section 33. One end of the third oil section 32 is connected to the second oil outlet 2021, the other end of the third oil section 32 is connected to one end of the fourth oil section 33, and the other end of the fourth oil section 33 is connected to the second oil channel, so that the cooling medium is guided from the rotating shaft 200 to the rotor core through the third oil section 32 and the fourth oil section 33, ensuring that the cooling medium can directly contact the rotor core, thereby improving the cooling effect on the rotor core. The third oil section 32 extends obliquely along the radial direction of the second end plate 31, and the fourth oil section 33 extends obliquely along the circumferential direction toward the radial outer side of the second end plate 31, so that an angle is formed between the third oil section 32 and the fourth oil section 33, and the angle can be set to 90°. A weight reduction hole 43 is set between the third oil section 32 and the fourth oil section 33, so that the second oil groove can avoid the weight reduction hole 43 from the path, avoid the cooling medium from entering the weight reduction hole 43, and prevent the cooling medium from accumulating in the weight reduction hole 43 to cause additional mechanical loss.

[0059] According to some embodiments of the present invention, the second oil section 23 and the fourth oil section 33 extend in opposite directions.

[0060] In some specific embodiments, since the first oil groove and the second oil groove arranged on the first end plate 21 and the second end plate 31 have the same structure but opposite assembly directions, the second oil section 23 and the fourth oil section 33 extend in opposite directions, so that the second oil section 23 and the fourth oil section 33 can be respectively connected to the adjacent first oil channel and the second oil channel, so that the cooling medium circulates between different oil channels, thereby enhancing the heat exchange effect and improving the cooling efficiency of the rotor core. In addition, the second oil section 23 and the fourth oil section 33 extend in opposite directions, ensuring that the cooling medium can flow to the first flow channel 101 and the second flow channel 102 in opposite directions after entering the first oil groove and the third oil groove, respectively, so that the cooling medium can evenly cover the entire core assembly, thereby improving the cooling uniformity of the core assembly.

[0061] According to some embodiments of the present invention, a first oil circuit 24 and a second oil circuit 25 that are interconnected are formed on the first end plate 21, the first oil circuit 24 is interconnected with the second flow channel 102 and extends radially, the second oil circuit 25 extends circumferentially, wherein the first oil circuit 24 and the second oil circuit 25 are configured as a second oil groove; a third oil circuit 34 and a fourth oil circuit 35 that are interconnected are formed on the second end plate 31, the third oil circuit 34 is interconnected with the first flow channel 101 and extends radially, the fourth oil circuit 35 extends circumferentially, wherein the third oil circuit 34 and the fourth oil circuit 35 are configured as a fourth oil groove.

[0062] In some specific embodiments, a first oil circuit 24 and a second oil circuit 25 are formed on the first end plate 21. The first oil circuit 24 and the second oil circuit 25 are connected to each other. The first oil circuit 24 and the second oil circuit 25 jointly define a second oil groove. The first oil circuit 24 extends radially and is connected to the second flow channel 102. The first oil circuit 24 connects the second flow channel 102 with the second oil circuit 25. The second oil circuit 25 is constructed as an annular oil circuit extending in the circumferential direction. The second oil circuit 25 is arranged opposite to the magnetic steel groove 111 at one end of the rotor core in the axial direction and covers the magnetic steel groove 111. The cooling medium in the second flow channel 102 can flow into the second oil circuit 25 through the first oil circuit 24, and then exchange heat with the magnetic steel at the end of the rotor core through the second oil circuit 25 to achieve cooling of the magnetic steel at the end of the rotor core, thereby further improving the cooling effect of the magnetic steel on the rotor core.

[0063] A third oil circuit 34 and a fourth oil circuit 35 are formed on the second end plate 31. The third oil circuit 34 and the fourth oil circuit 35 are connected to each other. The third oil circuit 34 and the fourth oil circuit 35 jointly define a fourth oil groove. The third oil circuit 34 extends radially and is connected to the first flow channel 101. The third oil circuit 34 connects the first flow channel 101 with the fourth oil circuit 35. The fourth oil circuit 35 is constructed as an annular oil circuit extending in the circumferential direction. The fourth oil circuit 35 is arranged opposite to the magnetic steel groove 111 at the other end of the rotor core in the axial direction and covers the magnetic steel groove 111. The cooling medium in the first flow channel 101 can flow into the fourth oil circuit 35 through the third oil circuit 34, and then exchange heat with the magnetic steel at the end of the rotor core through the fourth oil circuit 35, so as to realize cooling of the magnetic steel at the end of the rotor core, thereby further improving the cooling effect on the magnetic steel of the rotor core.

[0064] According to some embodiments of the present invention, a first oil outlet hole 201 and a second oil outlet hole 202 extending away from each other in the axial direction are respectively formed on the second oil passage 25 and the fourth oil passage 35 .

[0065] In some specific embodiments, a first oil outlet hole 201 is formed on the first end plate 21, and the first oil outlet hole 201 is connected to the second oil passage 25. A second oil outlet hole 202 is formed on the second end plate 31, and the second oil outlet hole 202 is connected to the fourth oil passage 35. The extension directions of the first oil outlet hole 201 and the second oil outlet hole 202 are opposite. The cooling medium in the second oil passage 25 can be sprayed to one end of the winding axial direction through the first oil outlet hole 201, and the cooling medium in the fourth oil passage 35 can be sprayed to the other end of the winding axial direction through the second oil outlet hole 202, thereby realizing cooling of both ends of the winding axial direction. The first oil outlet hole 201 and the second oil outlet hole 202 are respectively inclined. Constructing the first oil outlet hole 201 and the second oil outlet hole 202 as inclined holes can better guide the cooling medium The cooling medium is sprayed to both ends of the winding respectively. The design of the inclined hole allows the cooling medium to be sprayed out at a certain angle, which is usually 45° to the end face of the winding, to ensure that the cooling medium directly impacts the end of the winding instead of flowing vertically downward or axially, thereby reducing the lateral diffusion of the cooling medium before reaching both ends of the winding, improving the efficiency of the contact between the cooling medium and the winding, and thus improving the cooling effect on the winding. In addition, since the first oil outlet 201 and the second oil outlet 202 are inclinedly arranged, the first oil outlet 201 and the second oil outlet 202 are respectively close to the corresponding winding ends, and the cooling medium will not diffuse too much before reaching the winding. Therefore, the cooling medium is less affected by the rotor speed, and under low-speed and high-torque conditions, it still has a good cooling effect on the winding ends.

[0066] According to some embodiments of the present invention, the first oil circuit 24 is constructed as a plurality of intervals between each other and located on the inner periphery of the second oil circuit 25, and a first oil outlet hole 201 is provided between two adjacent first oil circuits 24; the third oil circuit 34 is constructed as a plurality of intervals between each other and located on the inner periphery of the fourth oil circuit 35, and a second oil outlet hole 202 is provided between two adjacent third oil circuits 34.

[0067] In some specific embodiments, a plurality of first oil passages 24 spaced apart from each other are provided on the inner circumference of the annular second oil passage 25, a first oil outlet 201 is provided between two adjacent first oil passages 24, and a distance from the first oil outlet 201 to one of the first oil passages 24 is equal to a distance from the first oil outlet 201 to another of the first oil passages 24, so as to ensure that the cooling medium is evenly distributed in the annular second oil passage 25 before being thrown out, so as to prevent the cooling medium from being overly concentrated in a certain area of ​​the second oil passage 25 or a certain area of ​​the second oil passage 25 without the cooling medium flowing through, so as to avoid the problem of excessive cooling of the end of the rotor core and insufficient cooling of other areas, thereby achieving uniform cooling of the magnetic steel at the end of the rotor core and improving the cooling effect of the magnetic steel at the end of the rotor core.

[0068] The inner circumference of the annular fourth oil circuit 35 is provided with a plurality of third oil circuits 34 spaced apart from each other, the second oil outlet hole 202 is provided between two adjacent third oil circuits 34, and the distance from the second oil outlet hole 202 to one of the third oil circuits 34 is equal to the distance from the second oil outlet hole 202 to another of the third oil circuits 34, so as to ensure that the cooling medium is evenly distributed in the annular fourth oil circuit 35 before being thrown out, so as to prevent the cooling medium from being overly concentrated in a certain area of ​​the fourth oil circuit 35 or no cooling medium flowing in a certain area of ​​the fourth oil circuit 35, so as to avoid the problem of excessive cooling of the end of the rotor core and insufficient cooling of other areas, thereby achieving uniform cooling of the magnetic steel at the end of the rotor core and improving the cooling effect of the magnetic steel at the end of the rotor core.

[0069] According to some embodiments of the present invention, the rotor core is formed by stacking a plurality of rotor punchings, each of which is formed with an oil injection hole, and the plurality of oil injection holes are arranged in sequence in the axial direction to define the first flow channel 101 and / or the second flow channel 102.

[0070] In some specific embodiments, the rotor core is formed by stacking a plurality of rotor punchings, so that the rotor core has high mechanical strength and good electromagnetic properties, and an oil spray hole is formed on each rotor punching, and the plurality of oil spray holes are arranged in sequence in the axial direction, that is, the positions of the oil spray holes between adjacent rotor punchings are aligned to define a first flow channel 101 and a second flow channel 102, thereby ensuring that the cooling medium can flow continuously along a preset path, thereby improving the cooling effect of the entire core assembly.

[0071] According to some embodiments of the present invention, two adjacent groups of magnetic steel slots 111 are symmetrically arranged about the first axis 41, and each group of magnetic steel slots 111 is symmetrically arranged about the second axis 42. The rotor core includes: a first core segment 112, a second core segment 113 and a third core segment 114. A first oil hole 103 is formed on the first core segment 112, and the center of the first oil hole 103 is circumferentially located on the counterclockwise side of the first axis 41; a second oil hole 104 is formed on the second core segment 113, and the center of the second oil hole 104 is arranged on the first axis 41; a third oil hole 105 is formed on the third core segment 114, and the center of the third oil hole 105 is circumferentially located on the clockwise side of the first axis 41, wherein the first core segment 112, the second core segment 113 and the third core segment 114 are constructed as a group or as a plurality of groups arranged in sequence in the thickness direction.

[0072] In some specific embodiments, the first axis 41 is constructed as the symmetry axis of two adjacent groups of magnetic steel slots 111, the second axis 42 is constructed as the symmetry axis of each group of magnetic steel slots 111, the rotor core is composed of a first core segment 112, a second core segment 113 and a third core segment 114, the first core segment 112 is provided with a first oil hole 103, the center of the first oil hole 103 is located on the circumferential counterclockwise side of the first axis 41, there is a first tilt angle between the radial axis of the first oil hole 103 and the first axis 41, the degree of the tilt angle needs to be calculated according to the number of rotor segments and the number of stator slots to calculate the optimal angle, the second core segment 113 is provided with a second oil hole 104, the radial axis of the second oil hole 104 coincides with the first axis 41, the third core segment 114 is provided with a third oil hole 105, the radial axis of the third oil hole 105 is located with a second tilt angle between the first axis 41 Angle, and the second inclined angle is symmetrically arranged with the first inclined angle about the first axis 41, and the first core segment 112, the second core segment 113 and the third core segment 114 are arranged in sequence in the axial direction, and then the positioning pin is used to pass through the first oil hole 103, the second oil hole 104 and the third oil hole 105 in sequence to ensure that the center of the first oil hole 103, the center of the second oil hole 104 and the center of the third oil hole 105 coincide, thereby realizing the segmented oblique pole of the rotor core; in addition, the first core segment 112, the second core segment 113 and the third core segment 114 can be constructed as a plurality of groups arranged in sequence in the axial direction according to the length of the motor 100 or design requirements, and the first oil hole 103, the second oil hole 104 and the third oil hole 105 are respectively constructed as oblong holes, so that the positioning pin has a certain adjustment space when it is in the first oil hole 103, the second oil hole 104 and the third oil hole 105, and it is also convenient to insert and remove the positioning pin.

[0073] According to some embodiments of the present invention, a mounting hole suitable for the rotating shaft 200 to pass through is formed on the rotor core, and a positioning groove 44 is formed at the edge of the mounting hole. The positioning groove 44 is located between the adjacent first axis 41 and the second axis 42, and the first axis 41 and the second axis 42 are symmetrically arranged about the positioning groove 44. The positioning groove 44 can provide a clear reference point for aligning the magnet and determining the starting position of the magnet's pole. The staff can determine the starting position of the N pole or S pole of the magnet through the positioning groove 44 to ensure that the polarity of all the magnets on each section of the rotor core is installed in a predetermined order. At the same time, during the assembly process, the positioning groove 44 can also help the staff quickly identify the front and back sides of the core segment, prevent incorrect assembly, ensure the correctness of the assembly, and improve the assembly efficiency of the rotor core.

[0074] In addition, the staff can use epoxy materials or injection molding materials to fix the magnetic steel in the magnetic steel slot 111. These materials not only improve the mechanical strength between the magnetic steel and the iron core, but also play the role of insulation and protection of the magnetic steel.

[0075] The vehicle according to the present invention will be briefly described below.

[0076] The vehicle according to the present invention is provided with the motor 100 described in any one of the above embodiments. Since the vehicle according to the present invention is provided with the motor 100 described in any one of the above embodiments, the heat dissipation performance of the vehicle during operation according to the present application is better, thereby improving the stability and reliability of the vehicle during operation.

[0077] In the description of the present invention, it is to 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”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, 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.

[0078] In the description of the present invention, "first feature" or "second feature" may include one or more of the features. In the description of the present invention, "plurality" means two or more.

[0079] In the description of the present invention, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0080] In the description of the present invention, “on”, “over” and “above” a first feature from a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0081] In the description of this specification, reference to the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" etc. 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.

[0082] In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0083] 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. A motor, characterized in that: include: A rotating shaft (200), wherein a first oil passage is formed on the rotating shaft (200), wherein the first oil passage has a first oil outlet (220) and a second oil outlet (221) respectively arranged at two ends of the rotating shaft in an axial direction; An iron core component, the iron core component being sleeved on the outer circumference of the rotating shaft (200), and a second oil passage communicating with the first oil outlet (2020) and a third oil passage communicating with the second oil outlet (2021) being formed inside the iron core component; wherein At least a portion of the second oil passage extends in the axial direction, at least a portion of the third oil passage extends in the axial direction, and the cooling medium in the second oil passage flows in opposite directions to the cooling medium in the third oil passage; The core assembly comprises: a rotor core, the rotor core being sleeved on the outer circumference of the rotating shaft (200), a first flow channel (101) and a second flow channel (102) extending in the axial direction being formed in the rotor core, and a magnetic steel slot (111) being formed on the rotor core; a first end plate (21), the first end plate (21) being arranged at one end of the rotating shaft (200) in the axial direction, the first end plate (21) being formed with a first oil groove communicating with the first oil outlet (2020) and a second oil groove communicating with the second flow channel (102), the second oil groove being arranged opposite to the magnetic steel groove (111); a second end plate (31), the second end plate (31) being arranged at the other end of the rotating shaft (200) in the axial direction, the second end plate (31) being provided with a third oil groove communicating with the second oil outlet (2021) and a fourth oil groove communicating with the first flow channel (101), the fourth oil groove being arranged opposite to the magnetic steel groove (111); The first flow channel (101) connects the first oil groove with the fourth oil groove, the second flow channel (102) connects the third oil groove with the second oil groove, the first oil groove, the first flow channel (101) and the fourth oil groove together define the first oil channel, and the second oil groove, the second flow channel (102) and the third oil groove together define the second oil channel.

2. The motor according to claim 1, characterized in that The first oil grooves are configured as a plurality of groups, and the third oil grooves are configured as a plurality of groups corresponding to the first oil grooves.

3. The motor according to claim 2, characterized in that The first oil grooves are configured as three groups arranged sequentially along the circumferential direction of the rotating shaft, and the third oil grooves are configured as three groups arranged sequentially along the circumferential direction of the rotating shaft.

4. The motor according to claim 1, characterized in that The first oil tank comprises: a first oil section (22), the first oil section (22) being in communication with the first oil outlet (2020), the first oil section (22) extending in a radial direction of the first end plate (21); a second oil section (23), the second oil section (23) being connected to the first oil section (22), the second oil section (23) extending obliquely along the circumferential direction toward the radial outer side of the first end plate (21); The third oil tank comprises: a third oil section (32), the third oil section (32) being in communication with the second oil outlet (2021), the third oil section (32) extending in a radial direction of the second end plate (31); A fourth oil section (33), the fourth oil section (33) being connected to the third oil section (32), the fourth oil section (33) extending obliquely along the circumferential direction toward the radial outer side of the second end plate (31).

5. The motor according to claim 4, characterized in that The second oil section (23) and the fourth oil section (33) extend in opposite directions.

6. The motor according to claim 1, characterized in that A first oil passage (24) and a second oil passage (25) are formed on the first end plate (21), the first oil passage (24) is connected to the second flow channel (102) and extends in the radial direction, and the second oil passage (25) extends in the circumferential direction, wherein the first oil passage (24) and the second oil passage (25) are configured as the second oil groove; A third oil passage (34) and a fourth oil passage (35) which are in communication with each other are formed on the second end plate (31); the third oil passage (34) is in communication with the first flow channel (101) and extends in the radial direction; the fourth oil passage (35) extends in the circumferential direction; wherein the third oil passage (34) and the fourth oil passage (35) are configured as the fourth oil groove.

7. The motor according to claim 6, characterized in that The second oil passage (25) and the fourth oil passage (35) are respectively formed with a first oil outlet hole (201) and a second oil outlet hole (202) extending away from each other in the axial direction.

8. The motor according to claim 7, characterized in that The first oil passages (24) are structured as a plurality of first oil passages (24) arranged at intervals from each other and located on the inner periphery of the second oil passage (25), and the first oil outlet hole (201) is arranged between two adjacent first oil passages (24); The third oil passages (34) are structured as a plurality of passages spaced apart from each other and located on the inner periphery of the fourth oil passage (35), and the second oil outlet hole (202) is provided between two adjacent third oil passages (34).

9. The motor according to claim 1, characterized in that The rotor core is formed by stacking a plurality of rotor punchings, each of which is formed with an oil injection hole, and the plurality of oil injection holes are arranged in sequence and in correspondence in the axial direction to define the first flow channel (101) and / or the second flow channel (102).

10. The motor according to claim 1, characterized in that Two adjacent groups of magnetic steel slots (111) are symmetrically arranged about a first axis (41), and each group of magnetic steel slots (111) is symmetrically arranged about a second axis (42). The rotor core comprises: A first iron core segment (112), wherein a first oil hole (103) is formed on the first iron core segment (112), and the center of the first oil hole (103) is located on the circumferentially counterclockwise side of the first axis (41); a second iron core segment (113), wherein a second oil hole (104) is formed on the second iron core segment (113), and the center of the second oil hole (104) is arranged on the first axis (41); A third core segment (114), wherein a third oil hole (105) is formed on the third core segment (114), wherein the center of the third oil hole (105) is located on the circumferential clockwise side of the first axis (41) in the circumferential direction, wherein the first core segment (112), the second core segment (113) and the third core segment (114) are constructed as a group or as a plurality of groups arranged in sequence in the thickness direction.

11. The motor according to claim 10, characterized in that The rotor core is formed with a mounting hole suitable for the rotating shaft (200) to pass through, and a positioning groove (44) is formed at the edge of the mounting hole. The positioning groove (44) is located between the adjacent first axis (41) and the second axis (42), and the first axis (41) and the second axis (42) are symmetrically arranged about the positioning groove (44).

12. A vehicle, characterized in that: The motor comprises the motor described in any one of claims 1 to 11.

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