Motor
By setting pressurization chambers and oil channels on the end plates or locking rings, the problem of oil not being able to accurately cover the stator windings is solved, achieving a more efficient cooling effect and ensuring that the oil is accurately injected into the target area.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-13
- Publication Date
- 2026-03-20
AI Technical Summary
The existing end-plate oil-throwing cooling method cannot meet the requirements of precise cooling. The oil cannot accurately cover the target area of the stator winding, affecting the uniformity and effectiveness of the cooling effect.
A booster chamber and oil passage are set on the end plate or locking ring. The pressure of the oil is increased through the booster chamber. The extension direction of the oil passage is designed to match the position of the stator winding to ensure that the oil is accurately injected into the target area.
It achieves precise oil injection and stable cooling effect, improves cooling efficiency and uniformity, and ensures that the oil can better cover the stator winding.
Smart Images
Figure CN224021582U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to motor field, especially a kind of motor. BACKGROUND
[0002] With the increasing demand for new energy vehicles around the world, the performance improvement of the core technology of new energy vehicles-three electric systems (including motor, electric control and reducer) has become the focus of industry development. To improve the power performance, acceleration ability and range of new energy vehicles, the market requirements for power density and system speed of new energy three electric systems are also increasing.
[0003] Currently, the cooling system of new energy vehicle industry is gradually improved from water cooling to oil cooling, for example, the oil liquid is shared by reducer and motor to realize more efficient and integrated thermal management solution. The common cooling method is to punch motor shaft and guide by oil groove of end plate, and the flower crown area of stator winding is cooled by oil throwing. However, when the oil liquid is thrown out of the end plate, its movement direction is out of control after leaving the end plate, which directly leads to the inaccuracy of oil throwing landing area. This inaccuracy makes the oil liquid unable to accurately cover the target area of stator winding that needs to be cooled, thereby affecting the uniformity and effectiveness of cooling effect, and the advantages of oil cooling system cannot be fully utilized.
[0004] Therefore, the existing end plate oil throwing cooling method cannot meet the demand of accurate cooling, and a new design scheme is urgently needed to solve the problem of oil trajectory accuracy to ensure that the thrown oil liquid can act more closely and accurately on the target area of stator winding designed for cooling, thereby improving the cooling efficiency. UTILITY MODEL CONTENT
[0005] The utility model aims at solving the problem that the existing end plate oil throwing cooling method cannot meet the demand of accurate cooling. The utility model provides a kind of motor, by setting pressure chamber and oil channel on end plate or lock ring, pressure chamber carries out pressure lifting to oil liquid in chamber, according to the position of stator winding, the extension direction of oil channel is determined, the accuracy of trajectory of ejected oil liquid is increased, and more controllable stator winding cooling effect is realized.
[0006] To solve the above technical problems, the embodiment of the utility model discloses a kind of motor, the motor includes:
[0007] Motor shaft, the motor shaft includes motor shaft oil hole;
[0008] Rotor core, end plate and lock ring are sequentially arranged on the motor shaft along the axial direction of the motor shaft, and the lock ring is used to fix the end plate and the rotor core;And
[0009] An oil injection structure is arranged on the end plate or the lock ring, wherein the oil injection structure comprises:
[0010] A pressurizing cavity is arranged at one end of the motor shaft oil hole;
[0011] An oil channel is arranged at the other end of the pressurizing cavity, and the other end of the oil channel is arranged to face the stator winding of the motor, and the extension direction of the oil channel intersects the axial direction.
[0012] According to the technical scheme, the pressurizing cavity is arranged on the end plate or the lock ring, so that the oil in the cavity can be pressurized, and the oil can be precisely and stably injected from the oil channel under the driving of high oil pressure, thereby improving the accuracy of the oil injection trajectory.
[0013] According to the position design of the stator winding, the oil can be precisely injected to the stator winding, so that the oil can maintain better directionality, the accuracy of the trajectory of the injected oil is increased, and a more controllable stator winding cooling effect is achieved.
[0014] According to another specific embodiment of the utility model, the pressurizing cavity comprises:
[0015] An oil inlet is arranged to communicate with the motor shaft oil hole;
[0016] An oil outlet is arranged at one end of the oil channel, and the cross-sectional area of the oil outlet is smaller than that of the oil inlet.
[0017] According to the technical scheme, the cross-sectional area of the oil outlet is smaller than that of the oil inlet, so that the oil pressure of the oil outlet is higher than that of the oil inlet, the oil can be high-speed injected through the oil channel, the oil can maintain better directionality, and the landing point of the target cooling area (i.e. the stator winding) can be more accurately controlled.
[0018] According to another specific embodiment of the utility model, the extension direction of the pressurizing cavity is perpendicular to the axial direction.
[0019] According to another specific embodiment of the utility model, the cross-sectional area of the pressurizing cavity gradually decreases in the direction perpendicular to the axial direction.
[0020] According to the technical scheme, the cross-sectional area of the pressurizing cavity gradually decreases, so that the oil pressure in the pressurizing cavity gradually increases, the oil can be high-speed injected through the oil channel, the oil can maintain better directionality, and the landing point of the target cooling area (i.e. the stator winding) can be more accurately controlled.
[0021] According to another specific embodiment of the utility model, the cross section of the pressurizing cavity is trapezoidal.
[0022] According to another specific embodiment of the present application, the liquid flow area of the oil inlet is larger than the liquid flow area of the oil hole of the motor shaft, and the oil inlet completely covers the oil hole of the motor shaft, and the liquid flow area of the oil outlet is smaller than the liquid flow area of the oil hole of the motor shaft.
[0023] According to another specific embodiment of the present application, the liquid flow area of the one end of the oil passage communicating with the pressure chamber is not larger than the liquid flow area of the oil outlet.
[0024] According to another specific embodiment of the present application, the included angle between the extension direction of the oil passage and the axial direction is a first angle, and the first angle is an acute angle or an obtuse angle.
[0025] By changing the included angle between the extension direction of the oil passage and the axial direction, the direction of the oil ejection can be directly opposite to the stator winding, and a more controllable stator winding cooling effect can be achieved.
[0026] According to another specific embodiment of the present application, the extension direction of the oil passage is perpendicular to the axial direction.
[0027] When the extension direction of the oil passage is perpendicular to the axial direction, the oil injection structure is arranged in the external structure, and by adjusting the length of the external structure, the oil can be accurately ejected to the specific target area of the stator winding, and a more controllable stator winding cooling effect can be achieved.
[0028] According to another specific embodiment of the present application, in response to the oil injection structure being arranged on the end plate, the lock ring comprises a notch, and the notch is used for the oil in the oil injection structure to be able to be injected onto the stator winding. BRIEF DESCRIPTION OF DRAWINGS
[0029] Figure 1 A cross-sectional view of a motor according to an embodiment of the present application is shown.
[0030] Figure 2 A schematic view of an oil injection structure according to an embodiment of the present application is shown. Figure 1 A local enlarged view of area A in the embodiment two of the present application is shown.
[0031] Figure 3 A cross-sectional view of a motor according to an embodiment of the present application is shown.
[0032] Figure 4 A local enlarged view of area B in the embodiment two of the present application is shown.
[0033] Figure 5 A schematic view of an oil injection structure according to an embodiment of the present application is shown. Figure 4 A local enlarged view of area B in the embodiment two of the present application is shown.
[0034] Figure 6 A schematic view of the oil injection structure of the third embodiment of the utility model is shown.
[0035] Figure 7 A sectional view of the motor of the third embodiment of the utility model is shown.
[0036] Figure 8 A schematic view of the oil injection structure of the third embodiment of the utility model is shown. Figure 7 A local enlarged view of the middle C area is shown.
[0037] Figure 9 A schematic view of the oil injection structure of the third embodiment of the utility model is shown.
[0038] Explanation of reference signs
[0039] The oil injection structure 100;
[0040] The pressurizing cavity 110;The oil inlet 111;The oil outlet 112;
[0041] The oil passage 120;
[0042] The motor 200;
[0043] The end plate 210;
[0044] The motor shaft 220;The motor shaft oil hole 221;
[0045] The stator winding 230;
[0046] The lock ring 240;The notch 241;
[0047] The rotor iron core 250. DETAILED DESCRIPTION
[0048] The implementation of the utility model will be described by specific embodiments, and the person skilled in the art can easily understand other advantages and effects of the utility model from the content disclosed in the description. Although the description of the utility model will be introduced together with the preferred embodiments, this does not mean that the features of the utility model are limited to this implementation. On the contrary, the purpose of introducing the utility model with the implementation is to cover other options or modifications that may be extended based on the claims of the utility model. In order to provide a deep understanding of the utility model, many specific details will be included in the following description. The utility model can also be implemented without using these details. In addition, in order to avoid confusion or obscure the focus of the utility model, some specific details will be omitted in the description. It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.
[0049] It should be noted that in the present specification, similar reference numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.
[0050] In the description of the present embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.
[0051] The terms "first", "second", and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance.
[0052] In the description of the present embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided", "connected", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present embodiment can be understood according to the specific circumstances.
[0053] In order to make the purpose, technical scheme and advantages of the utility model clearer, the embodiments of the utility model will be further described in detail below with reference to the drawings.
[0054] Embodiment one
[0055] Reference Figures 1 to 3 The present embodiment provides an electric machine 200, which comprises an electric machine shaft 220, a rotor core 250, an end plate 210 and a lock ring 240 provided on the electric machine shaft 220 in sequence along an axial direction X of the electric machine shaft 220, the lock ring 240 being used for fixing the end plate 210 and the rotor core 250, and the electric machine shaft 220 comprising an electric machine shaft oil hole 221.
[0056] The electric machine 200 further comprises an oil injection structure 100 and a stator winding 230, and the oil injection structure 100 is arranged on the end plate 210. The oil injection structure 100 comprises a booster cavity 110 and an oil channel 120, the booster cavity 110 comprising an oil inlet 111 and an oil outlet 112, the oil inlet 111 being in communication with the electric machine shaft oil hole 221. The oil outlet 112 is in communication with one end of the oil channel 120, the other end of the oil channel 120 being directed towards the stator winding 230, and the extension direction of the oil channel 120 intersects the axial direction X.
[0057] By adopting the above technical solution, the pressure of the oil (not shown in the figure) in the chamber can be increased by setting up the pressure chamber 110. When the oil is driven by high oil pressure, it can be accurately and stably ejected from the oil passage 120, thus improving the accuracy of the oil injection trajectory.
[0058] The extension direction of the oil passage 120 is determined by the position design of the stator winding 230, so that the oil can be accurately injected into the stator winding 230, making the oil maintain better directionality, increasing the accuracy of the trajectory of the injected oil, and achieving a more controllable cooling effect for the stator winding 230.
[0059] In some possible implementations, refer to Figure 2 and Figure 3 The cross-sectional area of the oil outlet 112 is smaller than the cross-sectional area of the oil inlet 111.
[0060] With the above technical solution, the cross-sectional area of the oil outlet 112 is smaller than that of the oil inlet 111. Therefore, the oil pressure at the oil outlet 112 is higher than that at the oil inlet 111. The oil can be ejected at high speed through the oil passage 120, so that the oil maintains better directionality and more accurately controls the landing point of the target cooling area (i.e., the stator winding 230).
[0061] In some possible implementations, refer to Figure 2 and Figure 3 The extension direction of the pressurization chamber 110 is perpendicular to the axial direction X.
[0062] In some possible implementations, refer to Figure 2 and Figure 3 Along the direction perpendicular to the X-axis outward (i.e. Figure 3 In the direction a), the cross-sectional area of the pressurization chamber 110 gradually decreases.
[0063] By adopting the above technical solution, the cross-sectional area of the booster chamber 110 is gradually reduced, which causes the oil pressure in the booster chamber 110 to gradually increase. Therefore, the oil can be ejected at high speed through the oil passage 120, so that the oil maintains better directionality and more accurately controls the landing point of the target cooling area (i.e., the stator winding 230).
[0064] In some possible implementations, refer to Figure 2 and Figure 3 The cross-section of the pressurization chamber 110 is an isosceles trapezoid.
[0065] It should be noted that the cross-sectional shape of the pressurization chamber 110 is not specifically limited in this embodiment. For example, in other possible implementations, the cross-sectional shape of the pressurization chamber 110 may be a right trapezoid, a semicircle, a semi-ellipse, etc.
[0066] In some possible implementations, refer toFigure 2 and Figure 3 The liquid flow area of the oil inlet 111 is greater than the liquid flow area of the motor shaft oil hole 221, and the oil inlet 111 completely covers the motor shaft oil hole 221. The liquid flow area of the oil outlet 112 is less than the liquid flow area of the motor shaft oil hole 221.
[0067] In some possible embodiments, referring to Figure 2 and Figure 3 The liquid flow area of the end of the oil gallery 120 that communicates with the pressurized cavity 110 is not greater than the liquid flow area of the oil outlet 112.
[0068] In some possible embodiments, referring to Figure 2 and Figure 3 The angle between the extension direction of the oil gallery 120 (i.e., the direction b in Figure 3 ) and the axial direction X is a first angle a, and the first angle a is an acute angle or an obtuse angle.
[0069] With the above technical solution, by changing the angle between the extension direction of the oil gallery 120 and the axial direction X (i.e., the first angle a), the direction of the oil ejection can be directly opposite to the stator winding 230, and a more controllable cooling effect of the stator winding 230 can be achieved.
[0070] It should be noted that the value of the first angle a is not specifically limited in the embodiments of the present application. For example, in other possible embodiments, the value of the first angle a can be 55°, 78°, 103.4°, etc.
[0071] In some possible embodiments, referring to Figure 2 and Figure 3 The locking ring 240 includes a notch 241, and the notch 241 is used for the oil in the oil injection structure 100 to be able to be injected onto the stator winding 230.
[0072] With the above technical solution, as shown by the dashed line in Figure 2 , the complete locking ring 240 is in a rectangular shape. In order to enable the oil in the oil injection structure 100 to be smoothly injected onto the stator winding 230, the technical solution sets the notch 241 on the locking ring 240 to avoid the injection path of the oil and avoid interference with the injection path of the oil.
[0073] Embodiment Two
[0074] Referring to Figures 4 to 6The motor 200' comprises a motor shaft 220', a rotor core 250', an end plate 210', and a lock ring 240' arranged on the motor shaft 220' in sequence along an axial direction X' of the motor shaft 220'. The lock ring 240' is configured to fix the end plate 210' and the rotor core 250'. The motor shaft 220' comprises a motor shaft oil hole 221'.
[0075] The motor 200' further comprises an oil injection structure 100' and a stator winding 230'. The oil injection structure 100' is arranged on the lock ring 240'. The oil injection structure 100' comprises a pressurizing cavity 110' and an oil channel 120'. The pressurizing cavity 110' comprises an oil inlet 111' and an oil outlet 112'. The oil inlet 111' is in communication with the motor shaft oil hole 221'. The oil outlet 112' is in communication with one end of the oil channel 120'. The other end of the oil channel 120' is directed towards the stator winding 230'. The extension direction of the oil channel 120' is perpendicular to the axial direction X'.
[0076] By arranging the pressurizing cavity 110', the pressure of the oil (not shown in the figure) in the cavity can be increased. When the oil is driven by high oil pressure, the oil can be precisely and stably ejected from the oil channel 120', improving the accuracy of the oil injection trajectory.
[0077] According to the position of the stator winding 230', the extension direction of the oil channel 120' can be determined. The oil can be precisely ejected to the stator winding 230', so that the oil maintains better directionality, increasing the accuracy of the trajectory of the ejected oil and achieving a more controllable cooling effect of the stator winding 230'.
[0078] In some possible implementation manners, referring to Figure 5 and Figure 6 , the cross-sectional area of the oil outlet 112' is smaller than the cross-sectional area of the oil inlet 111'.
[0079] By adopting the above technical solution, the cross-sectional area of the oil outlet 112' is smaller than the cross-sectional area of the oil inlet 111'. Therefore, the oil pressure of the oil outlet 112' is higher than the oil pressure of the oil inlet 111'. The oil can be ejected at high speed through the oil channel 120', so that the oil maintains better directionality and the landing point of the target cooling area (i.e., the stator winding 230') is more accurately controlled.
[0080] In some possible implementation manners, referring to Figure 5 and Figure 6 , the extension direction of the pressurizing cavity 110' is perpendicular to the axial direction X'.
[0081] In some possible implementation manners, referring to Figure 5 and Figure 6 , the extension direction of the pressurizing cavity 110' is perpendicular to the axial direction X'. Figure 6The cross-sectional area of the plenum 110' gradually decreases.
[0082] By gradually decreasing the cross-sectional area of the plenum 110', the oil pressure in the plenum 110' gradually increases, so that the oil can be ejected at high speed through the oil channel 120', so that the oil can maintain better directionality and more accurately control the landing point of the target cooling area (i.e., the stator winding 230').
[0083] In some possible embodiments, referring to Figure 5 and Figure 6 , the cross section of the plenum 110' is isosceles trapezoidal.
[0084] It should be noted that the cross-sectional shape of the plenum 110' is not specifically limited in the embodiments of the present application, for example, in other possible embodiments, the cross-sectional shape of the plenum 110' can be a right trapezoid, a semicircle, a semicircle, etc.
[0085] In some possible embodiments, referring to Figure 5 and Figure 6 , the liquid flow area of the oil inlet 111' is greater than the liquid flow area of the motor shaft oil hole 221' and the oil inlet 111' completely covers the motor shaft oil hole 221', and the liquid flow area of the oil outlet 112' is less than the liquid flow area of the motor shaft oil hole 221'.
[0086] In some possible embodiments, referring to Figure 5 and Figure 6 , the liquid flow area of the end of the oil channel 120' communicating with the plenum 110' is not greater than the liquid flow area of the oil outlet 112'.
[0087] In some possible embodiments, referring to Figure 5 and Figure 6 , the angle between the extension direction of the oil channel 120' (i.e., the direction b' in Figure 6 ) and the axial direction X' is a first angle a', and the first angle a' is an acute angle or an obtuse angle.
[0088] By changing the angle between the extension direction of the oil channel 120' and the axial direction X' (i.e., the first angle a'), the direction of the oil ejection can be directly opposite to the stator winding 230', so that a more controllable stator winding 230' cooling effect can be achieved.
[0089] It should be noted that the value of the first angle a' is not specifically limited in the embodiments of the present application, for example, in other possible embodiments, the value of the first angle a' can be 55°, 78°, 103.4°, etc.
[0090] Embodiment three
[0091] With reference to Figures 7 to 9 The embodiment of the present application provides a motor 200", which comprises a motor shaft 220", a rotor core 250", an end plate 210" and a lock ring 240" arranged on the motor shaft 220" in sequence along an axial direction X" of the motor shaft 220", and the lock ring 240" is used for fixing the end plate 210" and the rotor core 250", and the motor shaft 220" comprises a motor shaft oil hole 221".
[0092] The motor 200" further comprises an oil injection structure 100" and a stator winding 230", and the oil injection structure 100" is arranged on the lock ring 240". The oil injection structure 100" comprises a pressurizing cavity 110" and an oil channel 120", the pressurizing cavity 110" comprises an oil inlet 111" and an oil outlet 112", and the oil inlet 111" is in communication with the motor shaft oil hole 221". The oil outlet 112" is in communication with one end of the oil channel 120", and the other end of the oil channel 120" is directed to the stator winding 230", and the extension direction of the oil channel 120" intersects the axial direction X".
[0093] By arranging the pressurizing cavity 110", the pressure of the oil (not shown in the figure) in the cavity can be increased, and the oil can be precisely and stably ejected from the oil channel 120" under the driving of high oil pressure, thereby improving the accuracy of the oil injection trajectory.
[0094] According to the position design of the stator winding 230", the extension direction of the oil channel 120" is determined, so that the oil can be precisely ejected to the stator winding 230", the directionality of the oil is better, the accuracy of the trajectory of the ejected oil is increased, and a more controllable cooling effect of the stator winding 230" is achieved.
[0095] In some possible implementation manners, with reference to Figure 8 and Figure 9 The cross-sectional area of the oil outlet 112" is smaller than the cross-sectional area of the oil inlet 111".
[0096] By adopting the above technical scheme, the cross-sectional area of the oil outlet 112" is smaller than the cross-sectional area of the oil inlet 111", so the oil pressure of the oil outlet 112" is higher than the oil pressure of the oil inlet 111", the oil can be ejected at high speed through the oil channel 120", the directionality of the oil is better, and the landing point of the target cooling area (i.e. the stator winding 230") is more accurately controlled.
[0097] In some possible implementation manners, with reference to Figure 8 and Figure 9 The extension direction of the pressurizing cavity 110" is perpendicular to the axial direction X".
[0098] In some possible implementation manners, with reference to Figure 8 and Figure 9, along the outward direction perpendicular to the axial direction X" (i.e. Figure 9 , the cross-sectional area of the plenum 110" gradually decreases.
[0099] With the above technical solution, the oil pressure in the plenum 110" gradually rises due to the gradual decrease in the cross-sectional area of the plenum 110", so that the oil can be ejected at high speed through the oil channel 120", making the oil maintain better directionality and more accurately control the landing point of the target cooling area (i.e., the stator winding 230").
[0100] In some possible embodiments, with reference to Figure 8 and Figure 9 , the cross section of the plenum 110" is isosceles trapezoidal.
[0101] It should be noted that the cross-sectional shape of the plenum 110" is not specifically limited in the embodiments of the present application. For example, in other possible embodiments, the cross-sectional shape of the plenum 110" can be a right trapezoid, a semicircle, a semicircle, etc.
[0102] In some possible embodiments, with reference to Figure 8 and Figure 9 , the liquid flow area of the oil inlet 111" is greater than the liquid flow area of the motor shaft oil hole 221", and the oil inlet 111" completely covers the motor shaft oil hole 221", and the liquid flow area of the oil outlet 112" is less than the liquid flow area of the motor shaft oil hole 221".
[0103] In some possible embodiments, with reference to Figure 8 and Figure 9 , the liquid flow area of the end of the oil channel 120" communicating with the plenum 110" is not greater than the liquid flow area of the oil outlet 112".
[0104] In some possible embodiments, with reference to Figure 8 and Figure 9 , the extension direction of the oil channel 120" is perpendicular to the axial direction X".
[0105] With the above technical solution, when the extension direction of the oil channel 120" (i.e. Figure 9 , the direction b" in FIG. 10) is perpendicular to the axial direction, by adjusting the length of the locking ring 240", the direction of the oil ejection can be directly opposite to the stator winding 230", achieving a more controllable stator winding 230" cooling effect.
[0106] It should be noted that the extension direction of the oil channel 120" (i.e. Figure 9The direction b" in the oil passage 120" is perpendicular to the axial direction X" in the actual situation, and the angle between the extension direction of the oil passage 120" and the axial direction X", that is, the first angle a", can be accurately 90° or fluctuate in the range of 0-2°, and the first angle a" can be, for example, 89.9°, 90°, 90.2°, etc.
[0107] Although the utility model has been illustrated and described with reference to certain preferred embodiments thereof, it should be understood that the above description is a further detailed description of the utility model in combination with specific embodiments, and the specific implementation of the utility model cannot be limited to these descriptions. Those skilled in the art can make various changes in form and details, including making a number of simple inferences or substitutions, without departing from the spirit and scope of the utility model.
Claims
1. An electric motor, characterized in that, The motor includes: A motor shaft, the motor shaft including a motor shaft oil hole; A rotor core, an end plate, and a locking ring are sequentially arranged on the motor shaft along its axial direction. The locking ring is used to fix the end plate to the rotor core. An oil spraying structure, wherein the oil spraying structure is disposed on the end plate or on the locking ring, and wherein the oil spraying structure includes: A booster chamber, one end of which is connected to the oil hole of the motor shaft; The oil passage is connected to one end of the pressurization chamber, and the other end of the oil passage faces the stator winding of the motor. The extension direction of the oil passage intersects the axial direction.
2. The motor as described in claim 1, characterized in that, The pressurization chamber includes: An oil inlet, which is connected to the oil hole of the motor shaft; An oil outlet is connected to one end of the oil passage, and the cross-sectional area of the oil outlet is smaller than the cross-sectional area of the oil inlet.
3. The motor as described in claim 1 or 2, characterized in that, The pressurization chamber extends perpendicular to the axial direction.
4. The motor as described in claim 1 or 2, characterized in that, The cross-sectional area of the pressurization chamber gradually decreases in a direction perpendicular to the axial direction and outward.
5. The motor as described in claim 1 or 2, characterized in that, The cross-section of the pressurization chamber is trapezoidal.
6. The motor as described in claim 2, characterized in that, The liquid flow area of the oil inlet is larger than that of the motor shaft oil hole and the oil inlet completely covers the motor shaft oil hole, while the liquid flow area of the oil outlet is smaller than that of the motor shaft oil hole.
7. The motor as described in claim 2, characterized in that, The liquid flow area at the end of the oil passage that connects to the pressurization chamber is not greater than the liquid flow area at the oil outlet.
8. The motor as described in claim 1, characterized in that, The angle between the extension direction of the oil passage and the axial direction is a first angle, which is either an acute angle or an obtuse angle.
9. The motor as described in claim 1, characterized in that, The oil passage extends perpendicular to the axial direction.
10. The motor as described in claim 1, characterized in that, In response to the oil injection structure being disposed on the end plate, the locking ring includes a notch, the notch being used to allow oil within the oil injection structure to be sprayed onto the stator winding.