Motor and vehicle

Abstract

The utility model discloses a motor, which comprises a shell, a stator core, windings, a first oil guide ring and a second oil guide ring, the stator core is arranged in the shell, and the windings are assembled at the two ends of the stator core; a first oil duct extending in the axial direction is arranged in the stator core; the first oil guide ring is arranged on the first end part of the stator core and is communicated with the first end of the first oil duct; the second oil guide ring is arranged on the second end part of the stator core and is communicated with the second end of the first oil duct; the shell is provided with a second oil channel, and the second oil channel communicates with the first oil guide ring. According to the technical scheme, the first oil duct, the first oil guide ring, the second oil guide ring and the second oil duct form the cooling oil way, and the stator core and the winding of the motor are uniformly cooled through the cooling oil way, so that the heat dissipation capability of the motor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and in particular to a motor and a vehicle. Background Art

[0002] With the continuous development of new energy vehicle technology, motors, as core components of new energy vehicles, are gradually developing towards high torque density and high power density, which in turn puts higher requirements on the cooling and heat dissipation capabilities of motors, so as to improve the continuous torque and continuous power of motors by improving the efficient heat dissipation capabilities of motors.

[0003] At present, the main heat dissipation method of the motor is to use cooling oil pipe spraying. However, in the existing cooling oil pipe spraying heat dissipation method, due to the limitation of the number of cooling oil pipes, generally 2 to 3, the temperature distribution of the entire motor stator is uneven in terms of heat dissipation. Therefore, how to improve the heat dissipation capacity of the motor has become a technical problem that needs to be solved urgently. Utility Model Content

[0004] The embodiments of the utility model provide a motor and a vehicle to solve the problem that the heat dissipation capacity of the existing motor is poor.

[0005] A motor comprises a housing, a stator core and a winding, wherein the stator core is arranged in the housing, and the winding is mounted at both ends of the stator core, and further comprises a first oil guide ring and a second oil guide ring;

[0006] A first oil passage extending in the axial direction is provided in the stator core;

[0007] The first oil guide ring is disposed on the first end of the stator core and is connected to the first end of the first oil passage;

[0008] The second oil guide ring is disposed on the second end of the stator core and is connected to the second end of the first oil passage;

[0009] The housing is provided with a second oil passage, and the second oil passage is communicated with the first oil guide ring.

[0010] Furthermore, a plurality of the first oil passages are arranged in an annular manner and spaced apart from each other in the stator core.

[0011] Furthermore, the first oil guide ring is provided with a first oil guide groove extending along the circumferential direction of the stator core, and the first oil guide groove is connected to the first end of the first oil channel;

[0012] The second oil guide ring is provided with a second oil guide groove extending along the circumferential direction of the stator core, and the second oil guide groove is communicated with the second end of the first oil channel.

[0013] Further, a groove diameter of the first oil guiding groove is greater than a groove diameter of the second oil guiding groove.

[0014] Furthermore, the first oil guide ring is provided with a first oil injection hole arranged inwardly along the radial direction of the stator core;

[0015] The second oil guide ring is provided with a second oil injection hole which is arranged inwardly along the radial direction of the stator core.

[0016] Furthermore, the first oil guide ring is provided with a plurality of the first oil injection holes distributed in an annular manner, the second oil guide ring is provided with a plurality of the second oil injection holes distributed in an annular manner, and the aperture of the first oil injection hole is larger than the aperture of the second oil injection hole.

[0017] Furthermore, two ends of the stator core extend outwardly in a radial direction of the stator core to form a connection structure, and the housing, the stator core, the first oil guide ring and the second oil guide ring are detachably connected via the connection structure.

[0018] Further, the connection structure includes a fastener and a connection portion; the connection portion is provided with a connection hole;

[0019] The fastener passes through the connecting hole and is detachably connected to the housing, the stator core, the first oil guide ring and the second oil guide ring respectively.

[0020] Furthermore, the motor also includes a sealing structure, the first oil guide ring is arranged between the housing and the first end of the stator core, the sealing structure is arranged between the first oil guide ring and the first end of the stator core, and between the second oil guide ring and the second end of the stator core.

[0021] A vehicle comprises the above-mentioned motor.

[0022] The utility model embodiment provides a motor and a vehicle, the motor comprising a housing, a stator core and a winding, the stator core being arranged in the housing, and the windings being assembled at both ends of the stator core, and further comprising a first oil guide ring and a second oil guide ring; a first oil channel extending in an axial direction is arranged in the stator core; the first oil guide ring is arranged on the first end portion of the stator core and is communicated with the first end of the first oil channel; the second oil guide ring is arranged on the second end portion of the stator core and is communicated with the second end of the first oil channel; a second oil channel is arranged on the housing, and the second oil channel is communicated with the first oil guide ring, so that the first oil channel, the first oil guide ring, the second oil guide ring and the second oil channel form a cooling oil circuit, and the stator core and the winding of the motor are evenly cooled and dissipated through the cooling oil circuit, thereby improving the heat dissipation capacity of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a structural schematic diagram of a motor in one embodiment of the utility model;

[0025] Figure 2 It is a top view of the stator core in one embodiment of the utility model;

[0026] Figure 3 It is another structural schematic diagram of the motor in one embodiment of the utility model;

[0027] Figure 4 This is a structural schematic diagram of a first oil guide ring in an embodiment of the utility model;

[0028] Figure 5 It is a cross-sectional view of the first oil guide ring in one embodiment of the utility model.

[0029] In the figure: 10, stator core; 11, first oil channel; 12, connection structure; 121, fastener; 122, connection part; 20, winding; 30, first oil guide ring; 31, first oil guide groove; 32, first oil injection hole; 40, second oil guide ring; 50, second housing; 51, second oil channel; 60, sealing structure. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] This embodiment provides a motor, such as Figure 1-3As shown, it includes a housing, a stator core 10 and a winding 20, the stator core 10 is arranged in the housing, and the winding 20 is assembled at both ends of the stator core 10, and also includes a first oil guide ring 30 and a second oil guide ring 40; a first oil channel 11 extending in the axial direction is provided in the stator core 10; the first oil guide ring 30 is provided on the first end of the stator core 10 and is communicated with the first end of the first oil channel 11; the second oil guide ring 40 is provided on the second end of the stator core 10 and is communicated with the second end of the first oil channel 11; a second oil channel 51 is provided on the housing, and the second oil channel 51 is communicated with the first oil guide ring 30.

[0033] In a specific embodiment, the housing is provided with a second oil passage 51, and the second oil passage 51 is used to be connected to an oil pump. The oil pump is used to input cooling oil into the second oil passage 51. The cooling oil is used to cool the motor.

[0034] In a specific embodiment, a first oil passage 11 arranged in an axial direction is provided in the stator core 10; a first oil guide ring 30 is arranged on a first end portion of the stator core 10 and is communicated with a first end of the first oil passage 11; a second oil guide ring 40 is arranged on a second end portion of the stator core 10 and is communicated with a second end of the first oil passage 11, so that the first oil passage 11, the first oil guide ring 30, the second oil guide ring 40 and the second oil passage 51 form a cooling oil circuit, and the cooling oil enters the cooling oil circuit under the pressure of the oil pump, and the stator core 10 and the winding 20 of the motor are evenly cooled and dissipated through the cooling oil circuit, thereby improving the heat dissipation capacity of the motor.

[0035] Optionally, the housing includes a first housing and a second housing 50; the stator core 10 is disposed in the first housing. The second housing 50 is provided with a second oil passage 51, and a clearance fit is adopted between the second housing 50 and the first oil guide ring 30, and a sealing ring is provided at the clearance to form a sealed environment.

[0036] In one embodiment, if Figure 2 As shown, a plurality of first oil passages 11 are arranged in the stator core 10 and are distributed in an annular manner.

[0037] In this embodiment, a plurality of first oil passages 11 distributed at annular intervals are provided in the stator core 10, so that after the cooling oil enters the first oil guide ring 30, it passes through the plurality of first oil passages 11 distributed at annular intervals and flows into the second oil guide ring 40, thereby achieving uniform heat dissipation of the stator core 10.

[0038] In one embodiment, if Figure 4As shown, the first oil guide ring 30 is provided with a first oil guide groove 31 extending in the circumferential direction of the stator core 10, and the first oil guide groove 31 is connected to the first end of the first oil channel 11; the second oil guide ring 40 is provided with a second oil guide groove (not shown in the figure) extending in the circumferential direction of the stator core 10, and the second oil guide groove is connected to the second end of the first oil channel 11. The first oil guide groove 31, the first oil channel 11, the second oil guide groove and the second oil channel 51 are connected to each other to form a cooling oil circuit. It should be noted that the structure of the second oil guide groove is similar to that of the first oil channel 11. Figure 4 The structure of the first oil guide groove 31 is similar.

[0039] In this embodiment, the first oil guide ring 30 is provided with a first oil guide groove 31 arranged along the circumferential direction of the stator core 10, and the first oil guide groove 31 is communicated with the first end of the first oil channel 11 to ensure that the cooling oil can flow through the first oil guide groove 31, evenly flow into the first oil channel 11, and enter the second oil guide groove, thereby achieving uniform heat dissipation of the stator core 10. The first oil guide groove 31 and the second oil guide groove are both sealed and connected to the end of the stator core 10, so that the first oil guide groove 31, the first oil channel 11 and the second oil guide groove form a sealed oil circuit.

[0040] In one embodiment, the diameter of the first oil guiding groove 31 is greater than the diameter of the second oil guiding groove.

[0041] In this embodiment, the groove diameter of the first oil guide groove 31 is larger than the groove diameter of the second oil guide groove. Since the first oil guide groove 31 is closer to the oil inlet (i.e., the second oil channel 51) than the second oil guide groove, by making the groove diameter of the oil guide groove close to the oil inlet (i.e., the second oil channel 51) larger than the groove diameter of the oil guide groove far from the oil inlet, the cooling oil pressure and flow in the first oil guide ring 30 and the second oil guide ring 40 can be balanced, so that the cooling oil is evenly distributed on the windings at both ends of the stator.

[0042] In one embodiment, if Figure 5 As shown in the figure, the first oil guide ring 30 is provided with a first oil injection hole 32 arranged inwardly along the radial direction of the stator core 10; the second oil guide ring 40 is provided with a second oil injection hole (not shown in the figure) arranged inwardly along the radial direction of the stator core 10. It should be noted that the structure and position of the second oil injection hole on the second oil guide ring 40 are similar to those of the second oil guide ring 40. Figure 5 The structure and position of the first oil injection hole 32 on the first oil guide ring 30 are similar.

[0043] In this embodiment, a first oil injection hole 32 is provided on the first oil guide ring 30 and is arranged inwardly along the radial direction of the stator core 10, and a second oil injection hole is provided on the second oil guide ring 40 and is arranged inwardly along the radial direction of the stator core 10, so that a radial oil path is formed between the first oil guide ring 30 and the first oil injection hole 32, and a radial oil path is formed between the second oil guide ring 40 and the second oil injection hole. Cooling oil is sprayed from the first oil injection hole 32 and the second oil injection hole respectively to cool the winding 20 at both ends of the stator core 10. Together with the axial oil path formed by the first oil channel 11, the first oil guide ring 30 and the second oil guide ring 40, the two oil paths cool the motor at the same time, thereby improving the heat dissipation capacity of the motor.

[0044] In one embodiment, if Figure 5 As shown, the first oil guide ring 30 is provided with a plurality of first oil injection holes 32 distributed in an annular manner.

[0045] In this embodiment, the first oil guide ring 30 is provided with a plurality of first oil injection holes 32 distributed at annular intervals. This allows the cooling oil in the first oil guide ring 30 to be uniformly sprayed out to uniformly dissipate heat from the winding 20 on the stator core 10. It should be noted that the second oil guide ring 40 may also be provided with a plurality of second oil injection holes distributed at annular intervals. The aperture of the first oil injection hole 32 may be larger than the aperture of the second oil injection hole to balance the pressure and flow of the cooling oil.

[0046] In one embodiment, if Figure 1 As shown, two ends of the stator core 10 extend outwardly in the radial direction of the stator core 10 to form a connecting structure 12 , and the connecting structure 12 is detachably connected to the first oil guide ring 30 and the second oil guide ring 40 .

[0047] In a specific embodiment, in the related art, the motor can also use the method of forming a cooling oil circuit by the stator core 10 and the shell through interference fit to dissipate heat. However, when the two ends of the stator core 10 of the motor extend outward along the radial direction of the stator core 10 to form a connecting structure 12, the assembly method of the interference fit is not applicable between the stator core 10 and the shell. However, the present application forms a cooling oil circuit inside the stator core 10, so that it is not affected by the installation method of the stator core 10 and the shell, and can be applied to the installation method of the interference fit or other installation methods. In this embodiment, the shell, the stator core 10, the first oil guide ring 30 and the second oil guide ring 40 can be fixedly connected through the connecting structure 12, and the structure is simple and easy to install.

[0048] In one embodiment, if Figure 1 As shown, the connection structure 12 includes a fastener 121 and a connection portion 122; the connection portion 122 is provided with a connection hole; the fastener 121 passes through the connection hole and is detachably connected to the housing, the stator core 10, the first oil guide ring 30 and the second oil guide ring 40 respectively.

[0049] Preferably, the fastener 121 is a bolt.

[0050] In this embodiment, the connecting structure 12 includes a fastener 121 and a connecting portion 122; the connecting portion 122 is provided with a connecting hole; by passing the fastener 121 through the connecting hole, it is detachably connected to the housing, the stator core 10, the first oil guide ring 30 and the second oil guide ring 40 respectively, which can reduce the number of installation parts, and has a simple structure and easy installation.

[0051] In one embodiment, if Figure 2 As shown, the motor further includes a sealing structure 60, the first oil guide ring 30 is disposed between the housing and the first end of the stator core 10, and the sealing structure 60 is disposed between the first oil guide ring 30 and the first end of the stator core 10. The first oil guide groove 31 and the second oil guide groove are both sealed and connected to the end of the stator core 10 through the sealing structure 60, so that the first oil guide groove 31, the first oil passage 11 and the second oil guide groove form a sealed oil circuit.

[0052] Preferably, the sealing structure 60 includes a sealing ring.

[0053] In this embodiment, the first oil guide ring 30 is arranged between the housing and the first end of the stator core 10, and the sealing structure 60 is arranged between the first oil guide ring 30 and the first end of the stator core 10 to form a good sealing environment to facilitate pumping cooling oil into the cooling oil circuit.

[0054] This embodiment provides a vehicle, comprising the above-mentioned motor.

[0055] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention.

Claims

1. A motor, comprising a housing, a stator core and a winding, wherein the stator core is arranged in the housing, and the winding is assembled at both ends of the stator core, characterized in that: Also includes a first oil guide ring and a second oil guide ring; A first oil passage extending in the axial direction is provided in the stator core; The first oil guide ring is disposed on the first end of the stator core and is connected to the first end of the first oil passage; The second oil guide ring is disposed on the second end of the stator core and is connected to the second end of the first oil passage; The housing is provided with a second oil passage, and the second oil passage is communicated with the first oil guide ring.

2. The motor according to claim 1, characterized in that A plurality of the first oil passages are arranged in the stator core and are distributed in an annular manner.

3. The motor according to claim 1, characterized in that The first oil guide ring is provided with a first oil guide groove extending along the circumferential direction of the stator core, and the first oil guide groove is connected to the first end of the first oil channel; The second oil guide ring is provided with a second oil guide groove extending along the circumferential direction of the stator core, and the second oil guide groove is communicated with the second end of the first oil channel.

4. The motor according to claim 3, characterized in that The groove diameter of the first oil guiding groove is greater than the groove diameter of the second oil guiding groove.

5. The motor according to claim 1, characterized in that The first oil guide ring is provided with a first oil injection hole arranged inwardly along the radial direction of the stator core; The second oil guide ring is provided with a second oil injection hole which is arranged inwardly along the radial direction of the stator core.

6. The motor according to claim 5, characterized in that The first oil guide ring is provided with a plurality of the first oil injection holes distributed at annular intervals, and the second oil guide ring is provided with a plurality of the second oil injection holes distributed at annular intervals. The aperture of the first oil injection hole is larger than the aperture of the second oil injection hole.

7. The motor according to claim 1, characterized in that Two ends of the stator core extend outwardly in a radial direction of the stator core to form a connection structure, and the housing, the stator core, the first oil guide ring and the second oil guide ring are detachably connected via the connection structure.

8. The motor according to claim 7, characterized in that The connecting structure comprises a fastener and a connecting portion; the connecting portion is provided with a connecting hole; The fastener passes through the connecting hole and is detachably connected to the housing, the stator core, the first oil guide ring and the second oil guide ring respectively.

9. The motor according to claim 1, characterized in that The motor also includes a sealing structure, wherein the first oil guide ring is arranged between the housing and the first end of the stator core, the sealing structure is arranged between the first oil guide ring and the first end of the stator core, and between the second oil guide ring and the second end of the stator core.

10. A vehicle, characterized in that: Comprising a motor as claimed in any one of claims 1 to 9.

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