Oil-cooled motor and automobile
By setting up a cooling structure on the motor housing of the oil-cooled motor and opening an oil guide groove on the stator core, the problem of low cooling efficiency of the oil-cooled motor is solved, and efficient cooling and electromagnetic performance of the motor are improved.
Patent Information
- Application Number
- CN202420644572.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-03-29
AI Technical Summary
The cooling efficiency of existing oil-cooled motors is low, which affects the working efficiency and electromagnetic performance of the motor.
A cooling structure is provided on the motor housing, including an oil inlet and an oil injection tank, and an oil guide groove is opened on the stator core to connect the cooling structure with the oil guide groove to achieve sequential cooling and cooling of the motor housing, stator core and stator winding.
Through this solution, the cooling efficiency and electromagnetic performance of the oil-cooled motor are improved and the working efficiency of the motor is improved.
Smart Images
Figure CN222750285U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an oil-cooled motor, in particular to an oil-cooled motor and a car. Background Art
[0002] With the emergence and continuous development of high-power density motors for new energy vehicles, the problem of improving and enhancing motor heat dissipation has received increasing attention. The heat load generated during the operation of the motor will directly affect the output of the motor's peak and continuous performance and operational reliability. Therefore, the temperature rise of the motor is an important indicator for motor design and use. On the one hand, it is related to various loss and heating factors of the motor body, and on the other hand, it is also inseparable from the heat dissipation of the motor.
[0003] However, the existing motor cooling is achieved by adding parts such as oil collecting rings to the stator core to cool and dissipate heat, which has a poor cooling effect on the motor and has a great impact on the electromagnetic performance of the motor, resulting in low working efficiency of the motor. Therefore, there is room for improvement. Utility Model Content
[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an oil-cooled motor and a vehicle, which improve the problem of low cooling efficiency of the oil-cooled motor.
[0005] In order to solve the above technical problems, the utility model is achieved through the following technical solutions:
[0006] The utility model provides an oil-cooled motor, comprising:
[0007] Motor housing;
[0008] a stator core, disposed in the motor housing, the stator core comprising a core body and end punching sheets, the end punching sheets being disposed at ends of the core body; and
[0009] A cooling structure is provided on the motor housing, the cooling structure comprising at least one oil inlet and an oil spraying groove, the oil inlet is provided on the outer wall of the motor housing, the oil spraying groove is provided on the outer wall of the motor housing
[0010] The oil inlet is connected to the oil injection groove.
[0011] In an embodiment of the utility model, the core body and the motor housing are interference fit, and the end punch at least partially blocks the opening of the oil injection groove.
[0012] In an embodiment of the utility model, an oil guide groove is formed on the outer side wall of the core body, and when the stator core is matched with the motor housing, the oil injection groove is connected to at least one of the oil guide grooves.
[0013] In one embodiment of the utility model, the inner wall of the oil spray groove is sealed or through-hole arranged. When the inner wall of the oil spray groove is sealed, the cooling structure also includes at least one oil outlet, and the oil outlet is arranged on the inner wall of the motor housing. The oil inlet, the oil outlet, the oil guide groove and the oil spray groove are connected in sequence to form a first oil channel.
[0014] In an embodiment of the utility model, when an oil outlet is provided on the inner wall of the motor housing, one end of the oil outlet is connected to at least one oil inlet, and the other end of the oil outlet is connected to at least one oil guide groove.
[0015] In an embodiment of the utility model, when a plurality of the oil outlets are provided on the inner side wall of the motor housing, the plurality of the oil outlets are communicated with one oil inlet, and the plurality of the oil outlets are communicated with one oil guide groove.
[0016] In an embodiment of the utility model, when the inner wall of the oil spray groove is arranged as a through hole, the oil inlet is directly connected to the oil spray groove to form a second oil channel, and one of the oil inlets is connected to at least one of the oil spray grooves.
[0017] In an embodiment of the present utility model, when the oil inlet is directly connected to the oil spraying groove to form a second oil passage, one oil spraying groove is connected to a plurality of the oil inlets.
[0018] In an embodiment of the utility model, the direction of the central axis of the oil sprayed from the oil spray groove is arranged at an inclined angle with the direction of the central axis of the motor housing.
[0019] The utility model also provides a car, comprising the oil-cooled motor as described in any one of the above items.
[0020] As described above, the utility model provides an oil-cooled motor and a vehicle. By arranging a cooling structure on the motor housing, opening an oil guide groove on the stator core, and connecting the cooling structure with the oil guide groove, the motor housing, the stator core and the stator winding can be cooled in sequence, thereby improving the cooling efficiency and electromagnetic performance of the oil-cooled motor. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below 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.
[0022] Figure 1Shown is a schematic diagram of a partial assembly structure of an oil-cooled motor of an automobile of the utility model;
[0023] Figure 2 Shown is a system schematic diagram of a car of the utility model;
[0024] Figure 3 Display as Figure 1 Schematic diagram of the local structure in;
[0025] Figure 4 Display as Figure 1 Another partial structural diagram in ;
[0026] Figure 5 Display as Figure 4 A magnified view of the structure A;
[0027] Figure 6 Display as Figure 1 A partial cross-sectional view of
[0028] Figure 7 Shown is a structural schematic diagram of a car of the present utility model.
[0029] Component number description:
[0030] 100. Oil-cooled motor; 110. Motor housing;
[0031] 120, stator core; 121, core body; 1211, weld; 1212, oil guide groove; 122, end punching sheet; 1221, welding point; 130, stator winding;
[0032] 140. Cooling structure; 141. Oil inlet; 142. Oil spray tank; 143. Oil outlet;
[0033] 150, rotor;
[0034] 200. Automobile. DETAILED DESCRIPTION
[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0036] See also Figure 1The utility model provides an oil-cooled motor, which can be used in automobiles to cool the oil-cooled motor and improve the working efficiency of the oil-cooled motor. The oil-cooled motor 100 may include but is not limited to a motor housing 110, a stator core 120, a stator winding 130, a cooling structure 140 and a rotor 150. The motor housing 110 may be provided on the automobile to protect the stator core 120.
[0037] See also Figure 1 and Figure 2 The stator core 120 can be arranged in the motor housing 110, and the stator core 120 can be stacked by silicon steel sheets. Its main function is to reduce eddy current losses when the oil-cooled motor 100 is working, and provide a low magnetic resistance path to guide the magnetic field through the rotor 150 in the oil-cooled motor 100.
[0038] See also Figure 1 and Figure 2 , wherein the stator core 120 may include a core body 121 and end punching sheets 122. The core body 121 may be interference fit with the motor housing 110, and the core body 121 may be formed by stacking and extruding a plurality of silicon steel sheets. For example, the core body 121 may be formed by welding a plurality of silicon steel sheets, the core body 121 may also be formed by bonding a plurality of silicon steel sheets, or the core body 121 may also be formed by a plurality of silicon steel sheets through a covering buckle point method. That is, the manufacturing method of the core body 121 may not be specifically limited. For example, please refer to Figure 2 When the core body 121 is formed by welding a plurality of silicon steel sheets, a weld 1211 may be formed on the core body 121 .
[0039] See also Figure 1 and Figure 2 Furthermore, an oil guide groove 1212 may be formed on the outer wall of the core body 121 to cool the stator core 120. One, two, or other number of oil guide grooves 1212 may be provided, that is, the number of oil guide grooves 1212 may not be specifically limited.
[0040] See also Figure 1 and Figure 2Furthermore, the oil guide groove 1212 can be arranged axially, circumferentially, or in other forms. When the oil guide groove 1212 is arranged axially and the stator winding 130 is arranged at both ends of the core body 121, the oil guide groove 1212 can extend from one end of the outer wall of the core body 121 to the other end of the outer wall of the core body 121. That is, the length of the oil guide groove 1212 can be equal to the height of the outer wall of the core body 121 to achieve a better cooling effect on the stator core 120. However, it is not limited to this. When the stator winding 130 is arranged at only one end of the core body 121, the oil guide groove 1212 can extend from a certain position of the outer wall of the core body 121 to the end of the core body 121 where the stator winding 130 is arranged. That is, the length of the oil guide groove 1212 can be determined according to the cooling requirements of the stator core 120 itself and the cooling requirements of the stator winding 130. For example, please refer to Figure 2 The multiple oil guide grooves 1212 on the outer wall of the core body 121 are axially arranged, and the length of each oil guide groove 1212 is equal to the height of the outer wall of the core body 121.
[0041] See also Figure 1 and Figure 2 It is worth further explaining that the depth of the oil guide groove 1212 may not be specifically limited, as long as the depth can satisfy the normal flow of the oil and can achieve a certain cooling effect on the stator core 120 itself. When there are multiple oil guide grooves 1212, the multiple oil guide grooves 1212 may be arranged evenly or irregularly, that is, the arrangement of the multiple oil guide grooves 1212 may not be specifically limited. For example, see Figure 2 A plurality of axially arranged oil guide grooves 1212 are provided on the outer side wall of the core body 121 , and the plurality of oil guide grooves 1212 are evenly arranged with the central axis of the core body 121 as the central symmetry line.
[0042] See also Figure 1 and Figure 2 The end punching sheet 122 may be disposed at the end of the core body 121, and the end punching sheet 122 is fixedly connected to the core body 121. There is at least one end punching sheet 122, and the number of the end punching sheets 122 may be determined according to the number of the stator windings 130. For example, see Figure 2 When the stator windings 130 need to be provided at both ends of the core body 121 , two end punching sheets 122 may be provided, and the two end punching sheets 122 may be symmetrically arranged at both ends of the core body 121 .
[0043] See also Figure 1 and Figure 2In addition, the end punching sheet 122 may be a silicon steel sheet, and the end punching sheet 122 may be welded to the end of the core body 121, or may be bonded to the end of the core body 121. For example, see Figure 2 The end punching sheet 122 and the core body 121 can be fixedly connected by welding, and a welding spot 1221 is formed on the end punching sheet 122. However, it is not limited thereto, and the end punching sheet 122 can also be fixedly connected to the core body 121 by other methods.
[0044] See also Figure 1 and Figure 2 After the end punching sheet 122 is fixedly connected to the core body 121 to form the stator core 120, the stator winding 130 can be arranged in the stator core 120. The stator winding 130 can be made of copper wire or other conductive materials, which form the coils required for the motor to work. When current passes through the stator winding 130, they will generate a rotating magnetic field around the stator core 120.
[0045] See also Figure 1 and Figure 3 The cooling structure 140 may be provided on the motor housing 110 to cool the stator winding 130. The cooling structure 140 may include but is not limited to at least one oil inlet 141 and at least one oil injection groove 142. The oil inlet 141 may be provided on the outer wall of the motor housing 110, the oil injection groove 142 may be provided on the inner wall of the motor housing 110, and the oil inlet 141 and the oil injection groove 142 may be connected to each other.
[0046] See also Figure 1 and Figure 3 , wherein the oil inlet 141 may be provided in a hole shape or in a strip shape. However, it is not limited thereto, and the oil inlet 141 may also be provided in other shapes, that is, the shape of the oil inlet 141 may not be specifically limited. When the oil inlet 141 is provided in a strip shape, the oil inlet 141 may be provided in an axial strip shape, an arcuate strip shape, or an S-shaped strip shape. In addition, the size and specific position of the oil inlet 141 may not be specifically limited, as long as the oil inlet 141 is provided on the outer wall of the motor housing 110 and can be connected to the external oil rail to achieve oil inlet.
[0047] See also Figure 1 and Figure 3 Further, when there are multiple oil inlets 141, the multiple oil inlets 141 can be evenly or irregularly arranged on the outer wall of the motor housing 110. For example, see Figure 3, eight oil inlets 141 may be provided on the outer wall of the motor housing 110 , each of the oil inlets 141 is provided in a hole shape, and the eight oil inlets 141 may be evenly arranged around the outer wall of the motor housing 110 to achieve a better oil inlet effect.
[0048] See also Figure 1 , Figure 3 , Figure 4 and Figure 5 The number of the oil spraying slots 142 can be determined according to the number of the stator windings 130 to improve the spraying effect of the cooling oil on the stator windings 130. For example, one oil spraying slot 142 can be provided, two oil spraying slots 142 can be provided, or other numbers can be provided. When a plurality of oil spraying slots 142 are provided, the plurality of oil spraying slots 142 can be arranged evenly or irregularly.
[0049] See also Figure 1 , Figure 3 , Figure 4 and Figure 5 In order to achieve a better cooling effect on the stator winding 130, the central axis of each oil spray slot 142 and the central axis of the single-piece stator winding 130 can be set on the same vertical plane, so that the cooling oil in each oil spray slot 142 can be accurately sprayed on the corresponding stator winding 130. For example, refer to Figure 3 and Figure 5 When stator windings 130 are provided at both ends of the stator core 120, eight oil injection grooves 142 can be symmetrically provided at both ends of the inner wall of the motor housing 110, and the eight oil injection grooves 142 at each end are centrally symmetrically arranged with the central axis of the motor housing 110 as the center line.
[0050] See also Figure 1 , Figure 3 , Figure 4 and Figure 5 Furthermore, when the motor housing 110 and the stator core 120 cooperate with each other, the end punch 122 can at least partially block the opening of the oil spray slot 142 to increase the pressure of the cooling oil entering the oil spray slot 142, thereby increasing the spray distance of the cooling oil. The end punch 122 can block the opening of the oil spray slot 142 from the middle to both ends on the vertical axial section of the motor housing 110, and the blocking area ratio of the end punch 122 to the opening of the oil spray slot 142 can be determined according to the actual spraying requirements of the stator winding 130. For example, please refer to Figure 5 In the vertical axial section of the motor housing 110, the horizontal symmetry plane of the end punch 122 and the horizontal symmetry plane of the oil injection groove 142 are located on the same plane, and the blocking area ratio of the end punch 122 to the opening of the oil injection groove 142 can be eighty percent.
[0051] See also Figure 1 , Figure 3 , Figure 4 and Figure 5 Furthermore, when an oil guide groove 1212 is formed on the outer wall of the stator core 120 and the stator core 120 is matched with the motor housing 110, the oil injection groove 142 can be connected to at least one oil guide groove 1212. In addition, in the axial section from the motor housing 110 to the stator core 120, the oil injection groove 142 can be set in a U shape. However, it is not limited to this, and the oil injection groove 142 can also be set in other shapes.
[0052] See also Figure 1 , Figure 3 , Figure 4 and Figure 5 The direction of the central axis of the oil sprayed from the oil spraying slot 142 and the direction of the central axis of the motor housing 110 can be set at an inclined angle, so that the cooling oil can be accurately sprayed onto the stator winding 130, thereby improving the cooling efficiency of the stator winding 130. For example, the direction of the central axis of the cooling oil sprayed from the oil spraying slot 142 and the direction of the central axis of the motor housing 110 can be set at an inclined angle of 45°.
[0053] See also Figure 1 , Figure 3 , Figure 4 and Figure 5 It is worth further explaining that the inner wall of the oil injection groove 142 can be sealed or through-hole. When the inner wall of the oil injection groove 142 is sealed, the cooling structure 140 further includes at least one oil outlet 143, and at least one oil guide groove 1212 is further provided on the outer wall of the stator core 120. The oil outlet 143 can be provided on the inner wall of the motor housing 110, and the oil inlet 141, the oil outlet 143, the oil guide groove 1212 and the oil injection groove 142 can be connected in sequence to form a first oil channel, so as to realize cooling of the motor housing 110, the stator core 120 and the stator winding 130.
[0054] See also Figure 1 , Figure 3 , Figure 4 and Figure 5 , wherein, when an oil outlet 143 is provided on the inner side wall of the motor housing 110, one end of the oil outlet 143 can be connected to at least one oil inlet 141, and the other end of the oil outlet 143 can be connected to at least one oil guide groove 1212. By providing the oil inlet 141 and the oil outlet 143 to be connected to each other, the motor housing 110 itself can be cooled. By providing the oil outlet 143 and the oil guide groove 1212 to be connected to each other, the stator core 120 itself can be cooled.
[0055] For example, when an oil outlet 143 is provided on the inner wall of the motor housing 110, an oil inlet 141 may be provided on the outer wall of the motor housing 110, an oil guide groove 1212 may be formed on the outer wall of the stator core 120, one end of the oil outlet 143 may be connected to the oil inlet 141, and the other end of the oil outlet 143 may be connected to the oil guide groove 1212.
[0056] When multiple oil outlets 143 are provided on the inner wall of the motor housing 110, the multiple oil outlets 143 can be connected to an oil inlet 141, and the multiple oil outlets 143 can be connected to an oil guide groove 1212, so as to improve the cooling efficiency of the motor housing 110, and increase the flow rate and pressure of the cooling oil in the oil guide groove 1212, thereby increasing the spray distance of the cooling oil and improving the cooling efficiency of the stator winding 130.
[0057] For example, see Figure 3 and Figure 5 Stator windings 130 are provided at both ends of the stator core 120, and eight oil injection grooves 142 are symmetrically provided at both ends of the inner wall of the motor housing 110, and the eight oil injection grooves 142 at each end of the inner wall of the motor housing 110 can be evenly arranged around the central axis of the motor housing 110 as the central symmetry line.
[0058] See also Figure 3 and Figure 5 , 8 oil outlets 143 may be provided correspondingly, and the 8 oil outlets 143 may be evenly arranged around the central axis of the motor housing 110 as the central symmetry line. Each oil outlet 143 is located on the same axis as the oil spraying grooves 142 at its upper and lower ends, and each oil outlet 143 is located in the middle of the two oil spraying grooves 142 at its upper and lower ends, so that the cooling oil can flow from the oil outlet 143 to the oil spraying grooves 142 at both ends, and the flow rate of the cooling oil sprayed from the oil spraying grooves 142 at both ends is the same.
[0059] See also Figure 3 and Figure 5 Eight oil guide grooves 1212 can be evenly arranged on the outer wall of the stator core 120 with the central axis of the stator core 120 as the central symmetry line, each oil guide groove 1212 is axially arranged, and the oil inlet end of each oil guide groove 1212 is connected to the corresponding oil outlet 143, and the oil outlet end of each oil guide groove 1212 is connected to the oil inlet end of the corresponding oil injection groove 142.
[0060] See also Figure 3 and Figure 5Eight oil inlets 141 may be provided on the outer wall of the motor housing 110. The eight oil inlets 141 may be evenly symmetrically arranged with the central axis of the motor housing 110 as the central symmetry line. The plane where the central axis of each oil inlet 141 is located is located on the same horizontal plane as the plane where the central axis of its corresponding oil outlet 143 is located, and each oil inlet 141 is connected to a corresponding oil outlet 143.
[0061] When the inner wall of the oil injection groove 142 is provided with a through hole, the oil inlet 141 and the oil injection groove 142 can be directly connected to form a second oil passage, so as to improve the oil injection efficiency of the oil injection groove 142 and improve the cooling efficiency of the motor housing 110 itself. Among them, one oil inlet 141 can be connected to at least one oil injection groove 142. However, it is not limited to this. When the oil inlet 141 and the oil injection groove 142 are directly connected to form a second oil passage, one oil injection groove 142 can also be connected to multiple oil inlets 141 at the same time to increase the flow rate of the cooling oil in the oil injection groove 142, improve the oil injection efficiency of the oil injection groove 142, and then improve the cooling efficiency of the stator winding 130.
[0062] See also Figure 1 The rotor 150 may be disposed in the stator core 120. The rotor 150 is a rotating part located at the center of the oil-cooled motor 100, and is usually mounted on the motor shaft and connected to the bearing. Inside the stator core 120 and the stator winding 130, the rotor 150 rotates in the magnetic field generated by the stator core 120.
[0063] See also Figure 1 , Figure 5 and Figure 6 The utility model further provides a car 200, which may include the above-mentioned oil-cooled motor 100, so as to improve the heat dissipation effect of the oil-cooled motor 100, ensure the normal operation of the oil-cooled motor 100, and extend the service life.
[0064] See also Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 Specifically, a plurality of silicon steel sheets may be welded first to form the stator core 120. Then, eight oil guide grooves 1212 may be evenly and symmetrically arranged on the outer wall of the stator core 120 with the central axis of the stator core 120 as the central symmetry line, and each oil guide groove 1212 is arranged axially. That is, the length of each oil guide groove 1212 is equal to the height of the outer wall of the core body 121, so as to improve the cooling efficiency of the stator core 120 itself.
[0065] Subsequently, the two ends of the inner wall of the motor housing 110 can be machined to obtain the oil spray groove 142. In order to achieve a better oil spray cooling effect, the oil spray groove 142 can be set in a U-shaped manner on the axial section from the motor housing 110 to the stator core 120. The central axis of the oil spray groove 142 and the horizontal center line of the end punching sheet 122 can also be set to be on the same plane. When the stator core 120 and the motor housing 110 cooperate with each other, the outer side wall of the end punching sheet 122 can cooperate with the opening of the oil spray groove 142, and the direction of the central axis of the cooling oil sprayed from the oil spray groove 142 and the direction of the central axis of the motor housing 110 can be set at a 45° inclined angle to improve the cooling efficiency of the stator winding 130.
[0066] Furthermore, in order to facilitate the cooperation between the oil injection groove 142 and the oil guide groove 1212, a plurality of oil injection grooves 142 can be symmetrically arranged at both ends of the oil guide groove 1212, and each oil injection groove 142 is connected to its corresponding oil guide groove 1212. When the stator winding 130 is arranged at both ends of the stator core 120, eight oil injection grooves 142 can be symmetrically arranged at both ends of the inner side wall of the motor housing 110, and the eight oil injection grooves 142 at each end are centrally symmetrically arranged with the central axis of the motor housing 110 as the center line.
[0067] Furthermore, the inner wall of the oil injection groove 142 can be sealed, and when the inner wall of the oil injection groove 142 is sealed, the cooling structure 140 also includes 8 oil outlets 143. Among them, the 8 oil outlets 143 can be evenly arranged around the central axis of the motor housing 110 as the central symmetry line. Each oil outlet 143 is located on the same axis as the oil injection grooves 142 at its upper and lower ends, and each oil outlet 143 is located in the middle of the two oil injection grooves 142 at its upper and lower ends, so that the cooling oil can flow from the oil outlet 143 to the oil injection grooves 142 at both ends, and the flow rate of the cooling oil sprayed out by the oil injection grooves 142 at both ends is the same. In addition, the oil outlet 143, the oil guide groove 1212 and the oil injection groove 142 can be connected in sequence to form a part of the first oil channel to achieve cooling of the stator core 120 and the stator winding 130.
[0068] Finally, eight oil inlets 141 may be provided on the outer wall of the motor housing 110, and the eight oil inlets 141 may be evenly and symmetrically arranged with the central axis of the motor housing 110 as the central symmetry line. The plane where the central axis of each oil inlet 141 is located is located on the same horizontal plane as the plane where the central axis of its corresponding oil outlet 143 is located, and each oil inlet 141 is connected to one of its corresponding oil outlets 143.
[0069] Specifically, one end of the oil inlet 141 can be connected to the oil rail in the oil-cooled motor 100, and the other end of the oil inlet 141 can be connected to the corresponding oil outlet 143, the oil guide groove 1212 and the corresponding oil injection groove 142, so that the cooling oil can pass through the motor housing 110 and the stator core 120 in sequence through the oil rail, and finally be injected into the stator winding 130. It can not only realize the cooling of the motor housing 110, the stator core 120, and the stator winding 130, but also improve the electromagnetic performance of the oil-cooled motor 100 itself.
[0070] In summary, an oil-cooled motor and a vehicle provided by the utility model, by arranging a cooling structure on the motor housing, opening an oil guide groove on the stator core, and making the cooling structure and the oil guide groove communicate with each other, can realize the cooling and cooling of the motor housing, the stator core and the stator winding in sequence, thereby improving the cooling efficiency and electromagnetic performance of the oil-cooled motor, thereby improving the working efficiency of the oil-cooled motor.
[0071] In the description of this specification, the description with reference to the terms "this embodiment", "example", "specific example", 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 utility model. In this specification, the schematic representation of the above terms does 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.
[0072] The embodiments of the utility model disclosed above are only used to help illustrate the utility model. The embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.
Claims
1. An oil-cooled motor, characterized in that: The oil-cooled motor comprises: Motor housing; a stator core, disposed in the motor housing, the stator core comprising a core body and end punching sheets, the end punching sheets being disposed at ends of the core body; and A cooling structure is arranged on the motor housing, and the cooling structure includes at least one oil inlet and an oil spray groove. The oil inlet is arranged on the outer wall of the motor housing, and the oil spray groove is arranged on the inner wall of the motor housing, and the oil inlet is connected to the oil spray groove.
2. The oil-cooled motor according to claim 1, characterized in that: The iron core body is interference fit with the motor housing, and the end punch at least partially blocks the opening of the oil injection groove.
3. The oil-cooled motor according to claim 2, characterized in that: An oil guide groove is formed on the outer side wall of the core body. When the stator core is matched with the motor housing, the oil injection groove is connected to at least one of the oil guide grooves.
4. The oil-cooled motor according to claim 1, characterized in that: The inner wall of the oil spray groove is sealed or through-hole-arranged. When the inner wall of the oil spray groove is sealed, the cooling structure further includes at least one oil outlet, which is arranged on the inner wall of the motor housing. The oil inlet, the oil outlet, the oil guide groove and the oil spray groove are connected in sequence to form a first oil channel.
5. The oil-cooled motor according to claim 4, characterized in that: When one oil outlet is provided on the inner side wall of the motor housing, one end of the oil outlet is communicated with at least one oil inlet, and the other end of the oil outlet is communicated with at least one oil guide groove.
6. The oil-cooled motor according to claim 4, characterized in that: When a plurality of the oil outlets are provided on the inner side wall of the motor housing, the plurality of the oil outlets are communicated with one oil inlet, and the plurality of the oil outlets are communicated with one oil guide groove.
7. The oil-cooled motor according to claim 4, characterized in that: When the inner wall of the oil spraying groove is arranged as a through hole, the oil inlet is directly connected with the oil spraying groove to form a second oil passage, and one of the oil inlets is connected with at least one of the oil spraying grooves.
8. The oil-cooled motor according to claim 7, characterized in that: When the oil inlet is directly communicated with the oil spraying groove to form a second oil passage, one oil spraying groove is communicated with a plurality of the oil inlets.
9. The oil-cooled motor according to claim 1, characterized in that: The direction of the central axis of the oil sprayed from the oil spray groove is arranged at an inclined angle with the direction of the central axis of the motor housing.
10. An automobile, characterized in that: The automobile comprises an oil-cooled motor as claimed in any one of claims 1 to 9.