Oil-cooled motor and vehicle

Abstract

The utility model provides an oil-cooled motor and a vehicle. The oil-cooled motor comprises a housing, a stator core and a circumferential retainer. An assembly cavity is formed in the shell; the stator iron core is inserted into the assembly cavity, an oil cooling channel is formed in the stator iron core, and a stop groove is formed in the shaft end face of the stator iron core; the circumferential retainer is provided with a fixing part and a retaining part, the fixing part is fixedly connected with the opening end face of the assembly cavity, and the retaining part is in plug-in fit with the retaining groove so as to limit circumferential rotation of the stator iron core. According to the utility model, the design difficulty of the mold for forming the shell is lower, the processing procedure after the shell is formed is optimized, the manufacturing cost of the motor is optimized, the improvement of the cost performance of the whole vehicle is better promoted, and the market competitiveness of the product is favorably improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle components, and in particular relates to an oil-cooled motor and a vehicle. Background Art

[0002] With the development of industrial automation, motors are increasingly used across various industries, and the demand for motor reliability is also increasing. Motors generate significant heat during operation. To ensure performance, such as power density, efficient heat dissipation structures within the motor are essential. Existing motor cooling methods primarily include water cooling and oil cooling. Oil-cooled motors are becoming increasingly popular due to their superior heat dissipation efficiency and power density.

[0003] In existing oil-cooled motors, the cooling oil circuit is often designed as a closed circuit. This involves adding structures such as oil spray rings and sealing rings to seal the circumferential oil circuit around the stator core. This creates a closed cavity, generating oil pressure that ultimately sprays cooling oil onto the winding ends, cooling the stator. The circumferential clamping force of the oil channel structure is achieved by properly setting the interference fit between the housing and the stator core. If the interference fit is too small, a gap will form between the core and housing due to the different expansion coefficients of the core and housing materials, causing the armature to rotate circumferentially when torque increases, which in turn creates the risk of motor failure. If the interference fit is too large, the differential expansion coefficients can cause the core to bulge and deform, leading to sealing and insulation failure. Therefore, while selecting an appropriate interference fit, the core must be circumferentially limited to maintain circumferential retention of the motor armature during operation.

[0004] In existing oil-cooled motors, the armature's circumferential stop is achieved by opening a hole in the housing and tightening it with a set screw. Manufacturing the housing requires die-casting a pre-cast hole in the housing mold. After forming, the holes must be tapped to allow for threaded connection with the set screws. A corresponding sealing step is then machined into the hole to accommodate the sealing member that seals the set screw opening. This results in a complex and tedious design of the housing mold, and subsequent processing steps, making it difficult to further optimize the motor's production costs. Utility Model Content

[0005] The embodiments of the present utility model provide an oil-cooled motor and a vehicle, aiming to solve the problem of high production cost of the housing of the oil-cooled motor.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] In a first aspect, an embodiment of the present invention provides an oil-cooled motor, comprising:

[0008] a housing, forming an assembly cavity;

[0009] A stator core is inserted into the assembly cavity, an oil cooling channel is formed in the stator core, and a retaining groove is formed on the axial end surface of the stator core;

[0010] The circumferential stopper comprises a fixing portion and a stopping portion, wherein the fixing portion is fixedly connected to the opening end surface of the assembly cavity, and the stopping portion is plugged and fitted into the stopping groove to limit the circumferential rotation of the stator core.

[0011] In combination with the first aspect, in a possible implementation, both the fixing portion and the stopping portion are plate-shaped components, and the fixing portion and the stopping portion are arranged at an angle.

[0012] In some embodiments, the fixing portion is provided with a first fixing hole, the shell is provided with a second fixing hole, and the fixing portion and the shell are fixedly connected by a fastener passing through the first fixing hole and the second fixing hole.

[0013] In some embodiments, an oil injection ring fixing hole is further formed on the open end surface of the assembly cavity, and the second fixing hole coincides with the oil injection ring fixing hole.

[0014] In some embodiments, an anti-rotation portion is further provided on the fixing portion, an anti-rotation groove is provided on the shell, and the anti-rotation portion is plugged into the anti-rotation groove to limit the displacement of the fixing portion in the circumferential direction of the assembly cavity.

[0015] In combination with the first aspect, in a possible implementation, the stopping portion includes a stopping body and a stopping protrusion, the stopping body is connected to the fixing portion; the stopping protrusion is connected to the stopping body, and the stopping protrusion is plugged into the stopping groove.

[0016] In some embodiments, a plurality of the stopping protrusions are provided at intervals on the stopping body, and a plurality of the stopping grooves corresponding one-to-one to the stopping protrusions are provided on the stator core.

[0017] In some embodiments, the plurality of stopping protrusions are distributed at intervals along a path coaxial with the stator core, and the plurality of stopping grooves are distributed along the circumference of the stator core.

[0018] In some embodiments, the cross section of the stopping protrusion is polygonal, and the stopping groove and the stopping protrusion are arranged in the same shape.

[0019] Compared with the prior art, the solution shown in the embodiment of the present application utilizes an assembly cavity in the housing as a cavity for accommodating the armature (primarily composed of a stator winding and a stator core), and a circumferential stopper as a transition connection structure between the stator core and the housing. By providing an area connected to the fixing portion on the open end face of the assembly cavity, a fixed connection between the circumferential stopper and the housing is achieved. By inserting the stopper into the stopping groove, the stator core is circumferentially limited to prevent rotation. After actual assembly is completed, a sealing cover is further provided on the open end face of the assembly cavity to seal the opening of the assembly cavity and maintain the sealing of the assembly cavity.

[0020] It can be seen that the oil-cooled motor of the present application adopts the use of the axial end face of the assembly cavity to set the connection position, and realizes circumferential limitation by plugging the circumferential stopper with the axial end face of the stator core, which can realize the rational design of the interference fit between the stator core and the shell, and avoid the problems of high-temperature loosening and low-temperature deformation of the armature; when manufacturing the shell, there is no need to set a core for forming the top screw opening, the mold design of the shell is simpler, and there is no need to process the structure reserved for installing the sealing component in the area corresponding to the fixed part. The overall production cost of the oil-cooled motor is lower, and the production efficiency is effectively improved.

[0021] In a second aspect, an embodiment of the present invention further provides a vehicle comprising the above-mentioned oil-cooled motor.

[0022] Compared with the prior art, the solution shown in the embodiment of the present application adopts the above-mentioned oil-cooled motor, which makes the mold design for forming the shell less difficult, optimizes the processing steps after the shell is formed, and optimizes the manufacturing cost of the motor, which plays a better role in promoting the cost-effectiveness of the whole vehicle and is conducive to improving the market competitiveness of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a three-dimensional diagram of the assembly of the stator core and stator winding used in the first embodiment of the present invention;

[0024] Figure 2 for Figure 1 A magnified view of part A;

[0025] Figure 3 A three-dimensional diagram of a circumferential stopper used in the first embodiment of the present invention;

[0026] Figure 4 This is a front view of the assembly of the stator core and stator winding used in the second embodiment of the present utility model;

[0027] Figure 5 A three-dimensional diagram of a circumferential stopper used in the second embodiment of the present invention;

[0028] Figure 6 for Figure 5 B-direction view;

[0029] Figure 7 This is a front view of the assembly of the stator core, housing and oil injection ring used in the third embodiment of the present invention;

[0030] Figure 8 This is a front view of the assembly of the stator core, housing, circumferential stopper, and oil injection ring used in the third embodiment of the present invention;

[0031] Figure 9 for Figure 8 Magnified view of part C;

[0032] Description of reference numerals:

[0033] 1. Housing; 101. Anti-rotation groove; 2. Stator core; 201. Oil cooling channel; 202. Stop groove; 3. Circumferential stopper; 310. Fixing portion; 3101. First fixing hole; 320. Stopper; 321. Stop body; 322. Stopper protrusion; 323. Anti-misalignment protrusion; 330. Anti-rotation portion; 331. Latch section; 332. Connecting section; 4. Stator winding; 5. Fastener; 6. Oil injection ring; 610. Connecting ear; 7. Anti-misalignment groove. DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] In the claims, description and the above-mentioned drawings of the present utility model, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" is to distinguish different objects rather than to describe a specific order.

[0036] In the claims, specification and the above-mentioned drawings of the present utility model, unless otherwise expressly defined, directional words, such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", "high", "low", etc., indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific scope of protection of the present utility model.

[0037] In the claims, specification and the above drawings of the present utility model, unless otherwise clearly defined, if the terms "fixed connection" or "fixed connection" are used, they should be understood in a broad sense, that is, any connection method without any displacement relationship and relative rotation relationship between the two parties, that is to say, including non-detachable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or elements.

[0038] In the claims, description and drawings of the present utility model, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0039] Please also refer to Figures 1 to 9 The oil-cooled motor provided by the present invention is now described. The oil-cooled motor comprises a housing 1, a stator core 2, and a circumferential stopper 3. The housing 1 defines an assembly cavity. The stator core 2 is inserted into the assembly cavity. An oil-cooling channel 201 is formed within the stator core 2. A stopper groove 202 is defined on the axial end surface of the stator core 2. The circumferential stopper 3 comprises a fixing portion 310 and a stopper 320. The fixing portion 310 is fixedly connected to the open end surface of the assembly cavity. The stopper 320 engages and fits in the stopper groove 202 to restrict circumferential rotation of the stator core 2.

[0040] In this embodiment, the connection area between the fixing portion 310 and the open end face of the assembly cavity does not occupy an excessive amount of area and does not affect the connection between the sealing cover and the open end face of the housing 1. The connection method between the sealing cover and the housing 1 can refer to the traditional connection method, and there is no need to make significant structural improvements to the housing 1 and the sealing cover. In addition, by properly sizing the fixing portion 310, after the sealing cover is installed, the sealing cover covers the area where the fixing portion 310 is located. The fixing portion 310 does not affect the sealing structure between the sealing cover and the housing 1. Therefore, there is no need to specifically provide a sealing member corresponding to the fixing portion 310 on the sealing cover or the housing 1, further reducing the number of parts and also avoiding the need to process the corresponding sealing installation structure on the housing 1 or the sealing cover, thereby further reducing production costs.

[0041] In this embodiment, the oil cooling channel 201 and the retaining groove 202 provided on the stator core 2 do not interfere with each other. The oil cooling channel 201 can be designed according to actual cooling requirements and will not be described in detail here.

[0042] In this embodiment, a stator winding 4 is wound on the stator core 2, and the two cooperate to form an armature. The conductor of the stator winding 4 can be a flat wire that can meet the performance requirements of the motor. The specific structure will not be repeated here.

[0043] Compared with the prior art, the oil-cooled motor provided in this embodiment has an assembly cavity in the housing 1 that serves as a cavity for accommodating the armature (mainly composed of the stator winding 4 and the stator core 2), and a circumferential stopper 3 that serves as a transition connection structure between the stator core 2 and the housing 1. By providing an area connected to the fixing portion 310 on the open end face of the assembly cavity, the circumferential stopper 3 is fixedly connected to the housing 1. By plugging the stopper 320 into the stopping groove 202, the stator core 2 is circumferentially limited to prevent rotation of the stator core 2, thereby preventing slight rotation of the circumferential stopper 3 and the armature under special operating conditions. After actual assembly is completed, the open end face of the assembly cavity is further covered with a sealing cover to seal the opening of the assembly cavity and maintain the sealing of the assembly cavity.

[0044] It can be seen that the oil-cooled motor of this embodiment adopts the method of setting the connection position by utilizing the axial end face of the assembly cavity, and realizes circumferential limitation by plugging the circumferential stopper 3 with the axial end face of the stator core 2, which can realize the rational design of the interference fit between the stator core 2 and the housing 1, and avoid the problems of high-temperature loosening and low-temperature deformation of the armature; when manufacturing the housing 1, there is no need to set a core for forming the top screw opening, the mold design of the housing 1 is simpler, and there is no need to process the structure reserved for installing the sealing component in the area corresponding to the fixing part 310, the overall production cost of the oil-cooled motor is lower, and the production efficiency is effectively improved.

[0045] In some embodiments, see Figure 5 、 Figure 6 、 Figure 7 and Figure 9 The fixing portion 310 and the stop portion 320 are both plate-shaped components, and the fixing portion 310 and the stop portion 320 are arranged at an angle. This embodiment utilizes a plate-shaped design to achieve a compact structure for the circumferential stop 3, avoiding excessive space in the axial and radial directions of the assembly cavity. This substantially does not affect the assembly of other components surrounding the housing 1, thereby minimizing structural changes to the motor as a whole. Furthermore, the motor utilizes minimal material, better meeting lightweight design requirements. During manufacturing, the circumferential stop 3 can be formed through an integral bending process, avoiding the formation of a seam between the fixing portion 310 and the stop portion 320 and enhancing the structural strength of the circumferential stop 3. Circumferential stop 3 can be implemented using, but is not limited to, stainless steel plates (e.g., SPCC steel plates).

[0046] During specific implementation, the extension direction of the fixing portion 310 is parallel to the open end face of the assembly cavity. During assembly, the fixing portion 310 can be fitted and connected to the open end face of the assembly cavity to increase the bonding strength between the two. The plate surface of the fixing portion 310 and the opening direction of the assembly cavity are perpendicular to each other, or are set at an acute angle. The specific angle setting is designed according to the specific setting method of the open end face of the assembly cavity, and will not be listed here one by one.

[0047] In a specific implementation, the opening direction of the retaining groove 202 is the insertion direction of the stopper 320 into the retaining groove 202. The opening direction of the retaining groove 202 and the opening direction of the assembly cavity are mutually parallel, or are arranged at an angle, so as to achieve circumferential positioning after the stopper 320 is inserted. This is not a limitation. The accompanying drawings exemplify an embodiment in which the opening direction of the retaining groove 202 and the opening direction of the assembly cavity are mutually parallel.

[0048] It should also be noted that the angle between the fixing portion 310 and the stop portion 320 is related to the specific design of the stop groove 202 and the end surface of the assembly cavity opening. To meet assembly and position-limiting performance requirements, the angle is selected within a range of 70° to 120° (e.g., 80°, 90°, or 110°). This embodiment exemplifies a solution in which the opening direction of the stop groove 202 is parallel to the opening direction of the assembly cavity, and the end surface of the assembly cavity opening is perpendicular to the opening direction of the assembly cavity. Accordingly, the angle between the fixing portion 310 and the stop portion 320 is 90°.

[0049] In some specific embodiments, in order to avoid deformation and cracking due to stress concentration between the fixing portion 310 and the stopping portion 320 , a rounded transition is formed between the fixing portion 310 and the stopping portion 320 .

[0050] In order to achieve a fixed connection between the fixing portion 310 and the housing 1, in some embodiments, the connection method between the fixing portion 310 and the open end face of the assembly cavity is exemplified as follows: 1) A plug-in column is provided on one of the fixing portion 310 and the open end face of the assembly cavity, and a socket is provided on the other of the fixing portion 310 and the open end face of the assembly cavity. The plug-in column and the socket are interference-fitted to achieve plug-in fixation of the fixing portion 310 and the assembly cavity. 2) A snap is provided on one of the fixing portion 310 and the open end face of the assembly cavity, and a snap is provided on the other of the fixing portion 310 and the open end face of the assembly cavity. The snap is engaged with the snap to achieve snap-in fixation of the fixing portion 310 and the assembly cavity.

[0051] In order to achieve a fixed connection between the fixing portion 310 and the housing 1, in some other embodiments, see Figure 3 、 Figures 5 to 9, a first fixing hole 3101 is provided on the fixing part 310, and a second fixing hole is provided on the shell 1. The fixing part 310 and the shell 1 are fixedly connected by a fastener 5 that passes through the first fixing hole 3101 and the second fixing hole. Among them, the implementation methods of the fastener 5 include but are not limited to threaded fasteners 5, straight-insert buckles, rivets, etc., which are not solely limited here. The fixing part 310 and the shell 1 are fixedly connected by the fastener 5, the connection structure is simpler, and the connection reliability can be guaranteed, and the displacement of the fixing part 310 is effectively limited in the opening direction of the assembly cavity, avoiding the risk of the fixing part 310 falling off from the shell 1. It should be noted that the opening directions of the first fixing hole 3101 and the second fixing hole can be selected to be perpendicular to each other with respect to the opening end face of the assembly cavity to improve the convenience of assembly.

[0052] On the basis of the connection achieved through the first fixing hole 3101 and the second fixing hole, see Figure 8 and Figure 9 The open end face of the assembly cavity further defines a fixing hole for the fuel injection ring 6, with the second fixing hole coinciding with the fixing hole of the fuel injection ring 6. By coinciding the second fixing hole with the fixing hole of the fuel injection ring 6, the fixing portion 310 is stacked with the corresponding connecting structure on the fuel injection ring 6, and connected via a single fastener 5. This allows the fuel injection ring 6 and the circumferential stopper 3 to be fixed via a single hole, achieving integrated mounting points and avoiding the need for excessive holes on the open end face of the assembly cavity. This further reduces the difficulty of designing and manufacturing the housing 1, thereby further optimizing production costs.

[0053] During specific implementation, a connecting ear 610 is provided on the outer periphery of the fuel injection ring 6, which is connected to the corresponding fixing hole of the fuel injection ring 6 through the connecting ear 610. In order to reduce the impact on the surrounding components of the connecting ear 610, the outer peripheral contour line of the fixing portion 310 and the outer peripheral contour line of the connecting ear 610 coincide with each other. In the opening direction of the assembly cavity, the fixing portion 310 and the connecting ear 610 are stacked and connected by a fastener 5.

[0054] Of course, it should be understood that, when the design concept of hole integration is not considered, the second fixing hole and the fixing hole of the fuel injection ring 6 can also be separated from each other and staggered. The specific design method is selected according to actual assembly requirements and is not limited here.

[0055] In some embodiments, see Figures 5 to 9The fixing portion 310 is also provided with an anti-rotation portion 330. The housing 1 is provided with an anti-rotation groove 101. The anti-rotation portion 330 engages with the anti-rotation groove 101 to limit the displacement of the fixing portion 310 in the circumferential direction of the assembly cavity. When the fixing portion 310 is connected to the housing 1, or when the fastener 5 is loose and the armature tends to rotate in the assembly cavity, the fixing portion 310 may rotate. In the first scenario, the rotation of the fixing portion 310 affects the alignment of the stop portion 320 and the stop groove 202. In the second scenario, the rotation of the fixing portion 310 directly causes the circumferential limit to fail. In order to prevent the fixing part 310 from rotating, an anti-rotation part 330 is provided on the fixing part 310, and the fastener 5 cooperates with the anti-rotation part 330 so that there are at least two connection positions between the fixing part 310 and the shell 1. After the fastener 5 is inserted into the second fixing hole and the anti-rotation part 330 is inserted into the anti-rotation groove 101, the fixing part 310 will not rotate relative to the shell 1, and the stability of the position of the fixing part 310 can be effectively maintained.

[0056] On the basis of the fixed connection between the fixing portion 310 and the open end face of the assembly cavity, the anti-rotation groove 101 is arranged on the open end face of the assembly cavity, and the opening direction of the anti-rotation groove 101 is either parallel to the axial direction of the assembly cavity, or is arranged at an acute angle to the central axis of the assembly cavity, so that after the fixing portion 310 is attached to the open end face of the assembly cavity, the anti-rotation portion 330 can more conveniently enter the anti-rotation groove 101.

[0057] In some more specific embodiments, see Figure 5 The cross section of the anti-rotation portion 330 is circular, elliptical, polygonal, etc. This embodiment exemplarily shows an embodiment with a rectangular cross section. The anti-rotation groove 101 is arranged in a conformal manner with the anti-rotation portion 330. After the anti-rotation portion 330 is inserted into the anti-rotation groove 101, the anti-rotation groove 101 will not rotate, and the stability after insertion is better.

[0058] Optionally, the anti-rotation portion 330 may be provided on both sides of the fixing portion 310, or the anti-rotation portion 330 may be provided only on one side of the fixing portion 310 (eg, Figure 3 、 Figure 5 and Figure 6 shown).

[0059] In some specific embodiments of the anti-rotation portion 330, the anti-rotation portion 330 includes a latch section 331 and a connecting section 332, such as Figure 3 and Figure 5As shown, the connecting section 332 is arc-shaped, with one end of the connecting section 332 connected to the fixing portion 310, and the other end of the connecting section 332 connected to the end of the latch section 331. The latch section 331 is used to plug into the anti-rotation groove 101. The connecting section 332 connects the latch section 331 to the fixing portion 310. Since the connecting section 332 has a certain curvature, it has a certain elastic bending and deformation. When installing the circumferential stopper 3, it is necessary to align the fixing portion 310 to the specified installation position, and also to align the latch section 331 with the anti-rotation groove 101. During the alignment process, the latch section 331 will inevitably collide with the periphery of the anti-rotation groove 101. When this collision occurs, the connecting section 332 can undergo a certain elastic deformation, thereby absorbing some of the collision energy, preventing the area of the anti-rotation portion 330 adjacent to the fixing portion 310 from breaking, and thus extending the service life.

[0060] In some embodiments, see Figure 3 、 Figure 5 and Figure 6 The stopper 320 includes a stopper body 321 and a stopper protrusion 322. The stopper body 321 is connected to the fixing portion 310; the stopper protrusion 322 is connected to the stopper body 321 and engages with the stopper groove 202. This embodiment divides the stopper 320 according to different functions, and designs the stopper body 321 and the stopper protrusion 322 separately. This ensures a stable connection with the fixing portion 310 while allowing for more flexible configuration of the shape of the stopper protrusion 322, thereby preventing an excessively large opening area of the stopper groove 202 from affecting motor performance.

[0061] Based on the above embodiments, see Figure 3 and Figure 5 The stopper body 321 is provided with a plurality of stopper protrusions 322 at intervals, and the stator core 2 is provided with a plurality of stopper grooves 202 corresponding one-to-one with the stopper protrusions 322. In this embodiment, by providing a plurality of stopper protrusions 322 and a plurality of stopper grooves 202, a plurality of insertion and positioning points are provided between a circumferential stopper 3 and the housing 1. This effectively disperses the forces transmitted from the stator core 2, avoiding stress concentration between the stopper 320 and the housing 1 that could damage the stopper 320. Furthermore, by providing multiple insertion and positioning points, more reliable insertion and positioning is achieved, ensuring the stability of the position between the circumferential stopper 3 and the stator core 2.

[0062] Optionally, in order to reduce the space occupied by the stop portion 320 in the radial direction of the stator core 2, multiple stop protrusions 322 are spaced apart along a path coaxial with the stator core 2, and correspondingly, multiple stop grooves 202 are distributed along the circumference of the stator core 2. If the stop body 321 is a plate-shaped component, in order to adapt to the distribution of the stop protrusions 322 along an arc line, the stop body 321 is an arc-shaped plate coaxial with the stator core 2, and multiple stop protrusions 322 are distributed along the corresponding edges of the stop body 321, such as Figure 2 、 Figure 3 、 Figure 5 and Figure 7 shown.

[0063] In some embodiments, see Figures 1 to 5 The cross-section of the stop protrusion 322 is polygonal, and correspondingly, the stop groove 202 is also a polygonal groove, conforming to the stop protrusion 322. Once engaged with the stop protrusion 322, the stop protrusion 322 will not rotate within the stop groove 202, further stabilizing the position of the stop portion 320 relative to the stator core 2. During assembly, the stator core 2 is pre-installed in the housing 1. The stop protrusion 322 is first inserted into the stop groove 202 to pre-position the circumferential stop member 3 with the stator core 2. This allows the first fixing hole 3101 on the fixing portion 310 to align with the second fixing hole on the housing 1, facilitating installation of the fixing portion 310 and improving assembly efficiency of the circumferential stop member 3.

[0064] On the basis of the fixing portion 310 and the stopping portion 320 being arranged at an angle, in some embodiments, the width of the fixing portion 310 is smaller than the width of the stopping body 321. The wider stopping body 321 can be provided with more stopping protrusions 322 to improve the reliability of the anti-rotation stop. The narrower fixing portion 310 can avoid occupying too much space on the shell 1, and facilitates the arrangement of an installation position on the shell 1 that is compatible with the fixing portion 310.

[0065] Based on the above embodiment, if the stator core 2 tends to rotate, its force is transmitted to the fixed portion 310 through the stop body 321. Since the fixed portion 310 is fixed to the housing 1, the rotational force is likely to cause stress concentration in the intersection area of the fixed portion 310 and the stop body 321. In order to avoid deformation and cracking in this area, the side surface of the stop body 321 and the side surface of the fixed portion 310 are transitionally connected through an arc-shaped transition surface.

[0066] In some embodiments, see Figure 2 and Figure 3A foolproof protrusion 323 is provided on one of the outer circumferential surface of the stopper protrusion 322 and the side wall of the stopper groove 202. A foolproof groove 7 is provided on the other of the outer circumferential surface of the stopper protrusion 322 and the side wall of the stopper groove 202. The foolproof protrusion 323 is inserted and adapted into the foolproof groove 7 along the insertion direction of the stopper protrusion 322. The foolproof groove 7 and the foolproof protrusion 323 cooperate to restrict the assembly posture of the circumferential active component and prevent the circumferential stopper 3 from being installed upside down. Furthermore, by differentiating the foolproof groove 7 and the foolproof protrusion 323 (e.g., different shapes, different numbers, etc.), it is possible to distinguish circumferential stoppers 3 at different locations, achieving a one-to-one correspondence between the circumferential stoppers 3 and different areas on the stator core 2. Figure 2 and Figure 3 exemplarily shows an embodiment in which an anti-fouling protrusion 323 is provided on the outer peripheral surface of the stopping protrusion 322 and an anti-fouling groove 7 is provided on the side wall of the stopping groove 202.

[0067] Compared with the traditional technical solution that requires the stator core 2 to be positioned by means of a top screw, the oil-cooled motor of the present application does not require a threaded hole to be opened on the side wall of the housing 1 for screw connection with the top screw. At the same time, there is no need to consider the need for an additional sealing structure at the opening. Mechanical connection can be performed within the housing 1. This not only solves the problems of armature loosening at high temperature and deformation at low temperature, but also prevents the risk of motor failure caused by armature rotation during motor operation, thereby increasing product stability.

[0068] Based on the same inventive concept, an embodiment of the present application also provides a vehicle, including the above-mentioned oil-cooled motor.

[0069] Compared with the prior art, the vehicle provided in this embodiment adopts the above-mentioned oil-cooled motor, which makes the mold design for forming the shell 1 less difficult, optimizes the processing steps after the shell 1 is formed, and optimizes the manufacturing cost of the motor, which plays a better role in promoting the cost-effectiveness of the entire vehicle and is conducive to improving the market competitiveness of the product.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An oil-cooled motor, characterized in that: include: A housing (1) is formed with an assembly cavity; A stator core (2) is inserted into the assembly cavity, an oil cooling channel (201) is formed in the stator core (2), and a retaining groove (202) is provided on the axial end surface of the stator core (2); A circumferential stopper (3) comprises a fixing portion (310) and a stopping portion (320), wherein the fixing portion (310) is fixedly connected to the open end face of the assembly cavity, and the stopping portion (320) is plugged and fitted into the stopping groove (202) to limit the circumferential rotation of the stator core (2).

2. The oil-cooled motor according to claim 1, characterized in that: The fixing portion (310) and the stopping portion (320) are both plate-shaped components, and the fixing portion (310) and the stopping portion (320) are arranged at an angle.

3. The oil-cooled motor according to claim 2, characterized in that: The fixing portion (310) is provided with a first fixing hole (3101), the housing (1) is provided with a second fixing hole, and the fixing portion (310) and the housing (1) are fixedly connected via a fastener (5) passing through the first fixing hole (3101) and the second fixing hole.

4. The oil-cooled motor according to claim 3, characterized in that: The open end surface of the assembly cavity is also provided with an oil injection ring (6) fixing hole, and the second fixing hole coincides with the oil injection ring (6) fixing hole.

5. The oil-cooled motor according to claim 1 or 2, characterized in that: The fixing portion (310) is further provided with an anti-rotation portion (330), and the housing (1) is provided with an anti-rotation groove (101). The anti-rotation portion (330) is plugged into the anti-rotation groove (101) to limit the displacement of the fixing portion (310) in the circumferential direction of the assembly cavity.

6. The oil-cooled motor according to claim 1, characterized in that: The stopping portion (320) comprises a stopping body (321) and a stopping protrusion (322); the stopping body (321) is connected to the fixing portion (310); the stopping protrusion (322) is connected to the stopping body (321), and the stopping protrusion (322) is plugged into the stopping groove (202).

7. The oil-cooled motor according to claim 6, characterized in that: A plurality of the stopping protrusions (322) are provided at intervals on the stopping body (321), and a plurality of the stopping grooves (202) corresponding one-to-one to the stopping protrusions (322) are provided on the stator core (2).

8. The oil-cooled motor according to claim 7, characterized in that: The plurality of stop protrusions (322) are distributed at intervals along a path coaxial with the stator core (2), and the plurality of stop grooves (202) are distributed along the circumference of the stator core (2).

9. The oil-cooled motor according to claim 6, characterized in that: The cross section of the stopping protrusion (322) is polygonal, and the stopping groove (202) and the stopping protrusion (322) are arranged in accordance with the shape.

10. A vehicle, characterized in that: The oil-cooled motor comprises the oil-cooled motor as claimed in any one of claims 1 to 9.

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