Stator assembly, electric machine and vehicle

Abstract

This disclosure provides a stator assembly, a motor, and a vehicle, relating to the field of motor technology. The stator assembly includes: a core having a plurality of heat exchange channels spaced circumferentially along the core, the heat exchange channels extending axially along the core; a heat exchange ring disposed at an end of the core, having a plurality of liquid inlet channels and a plurality of liquid outlet channels alternately distributed circumferentially along the heat exchange ring, the liquid inlet channels and the liquid outlet channels respectively communicating with the heat exchange channels; and a connecting assembly including a locking block, a locking groove, and a spring clip, the locking block being disposed on the heat exchange ring, the locking groove being disposed on the core, and the spring clip being disposed on the locking block, the spring clip being used to apply a compressive force to the sidewall of the locking groove. This improves the structural stability of the stator assembly.

Description

Technical Field

[0001] This disclosure relates to the field of electric motor technology, and more specifically, to a stator assembly, an electric motor, and a vehicle. Background Technology

[0002] The higher the speed, torque density, and power density of an electric motor, the more heat it generates. Therefore, a robust heat dissipation and cooling structure is essential for the reliable, stable, and efficient operation of the motor. Motor cooling can be categorized into air cooling, water cooling, and oil cooling. Traditional motor cooling primarily uses water cooling, with a very small number of low-performance motors employing economical air cooling. Water cooling, being an indirect method, has certain drawbacks because the cooling water cannot directly contact the heat dissipation components. Oil cooling, with its inherent electrical insulation and high degree of structural design freedom, is becoming the preferred cooling solution for high-performance motors.

[0003] The structural stability of the stator assembly of existing motors needs to be improved.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] This disclosure provides a stator assembly, a motor, and a vehicle that can improve the structural stability of the stator assembly.

[0006] According to a first aspect of this disclosure, a stator assembly is provided, comprising:

[0007] The core has a plurality of heat exchange channels spaced apart circumferentially along the core, the heat exchange channels extending axially along the core;

[0008] A heat exchange ring is disposed at the end of the core and has multiple liquid inlet channels and multiple liquid outlet channels alternately distributed along the circumference of the heat exchange ring. The liquid inlet channels and the liquid outlet channels are respectively connected to the heat exchange channels.

[0009] The connecting assembly includes a locking block, a locking slot, and a spring plate. The locking block is located on the heat exchange ring, the locking slot is located on the core, and the spring plate is located on the locking block. The spring plate is used to apply a pressing force to the side wall of the locking slot.

[0010] In one embodiment of this disclosure, the spring includes a mounting portion, a first elastic portion, and a second elastic portion. The first elastic portion and the second elastic portion are respectively connected to the mounting portion, and a clearance groove is provided between the first elastic portion and the second elastic portion. The mounting portion is connected to the locking block, and the side of the first elastic portion and the second elastic portion that is far away from each other is used to apply a compressive force to the side wall of the locking groove.

[0011] In one embodiment of this disclosure, the first elastic portion has a first expansion portion at one end away from the mounting portion, and the first expansion portion protrudes in a direction away from the second elastic portion.

[0012] The second elastic portion has a second expansion portion at one end away from the mounting portion, and the second expansion portion protrudes toward the second elastic portion in a direction away from the first elastic portion.

[0013] In one embodiment of this disclosure, the card block has a positioning post, the mounting part has a positioning hole, and the positioning post can cooperate with the positioning hole.

[0014] In one embodiment of this disclosure, the heat exchange ring has a plurality of protrusions, which are distributed at intervals along the circumference of the heat exchange ring. An inlet channel is formed between two adjacent protrusions, and an outlet channel is located inside the protrusion. The inner peripheral wall of the heat exchange ring has an outlet hole communicating with the outlet channel.

[0015] In one embodiment of this disclosure, the card block is disposed in one of the liquid inlet channels, and the card slot is connected to the heat exchange channel.

[0016] In one embodiment of this disclosure, the stator assembly further includes a sealing ring disposed between the core and the heat exchange ring;

[0017] The sealing ring includes a ring body and a plurality of sealing frames. The plurality of sealing frames are distributed at intervals along the circumference of the ring body on the outer peripheral wall of the ring body. Each sealing frame has a through hole and is connected to the protrusion. The through hole communicates with the liquid inlet channel.

[0018] In one embodiment of this disclosure, the sealing ring further includes a sealing portion connected to the ring body and located between two adjacent sealing frames, the sealing portion having a clearance cavity for avoiding the locking block.

[0019] In one embodiment of this disclosure, the end of the locking block has a hook for engaging the sealing ring.

[0020] In one embodiment of this disclosure, the card block and the heat exchange ring are integrally thermoplastic molded.

[0021] According to a second aspect of this disclosure, an electric motor is provided, including the stator assembly described in any of the above embodiments.

[0022] According to a third aspect of this disclosure, a vehicle is provided, including the motor described in any of the above embodiments.

[0023] The stator assembly, motor, and vehicle disclosed herein allow oil to be introduced into the inlet channel, enabling the oil to enter the heat exchange channel inside the core and finally flow out from the outlet channel. During its flow through the heat exchange channel, the oil can exchange heat (e.g., cool) with the core, which is beneficial for the normal operation of the stator assembly. Simultaneously, the engagement of the locking block and slot, along with the spring applying pressure to the sidewall of the slot, improves the connection performance between the heat exchange ring and the core, reduces the possibility of detachment, and enhances the structural stability and reliability of the stator assembly. Furthermore, during the installation of the heat exchange ring and the core, the sealing part can be hooked onto the hook first, and then the heat exchange ring with the hooked sealing ring is fixed to the core through the engagement of the locking block and slot. This eliminates the need for additional support for the sealing ring, saving steps and improving production efficiency.

[0024] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0025] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0026] Figure 1 This is an overall schematic diagram of a stator assembly in one embodiment of this disclosure.

[0027] Figure 2 This is a schematic diagram of the core in one embodiment of the present disclosure.

[0028] Figure 3 This is a partial schematic diagram of the core in one embodiment of this disclosure.

[0029] Figure 4 This is a schematic diagram of the heat exchange ring in one embodiment of the present disclosure.

[0030] Figure 5 This is a partial schematic diagram of a heat exchange ring in one embodiment of this disclosure.

[0031] Figure 6 for Figure 5 A schematic diagram of the overall structure of the shrapnel.

[0032] Figure 7 This is a schematic diagram of the sealing ring in one embodiment of the present disclosure.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Core; 11. Heat exchange channel; 12. Mounting hole; 2. Heat exchange ring; 21. Liquid inlet channel; 22. Liquid outlet channel; 23. Protrusion; 24. Liquid outlet hole; 3. Connecting assembly; 31. Locking block; 311. Positioning post; 312. Locking hook; 32. Locking groove; 33. Spring; 331. Mounting part; 332. First elastic part; 333. Second elastic part; 334. First expansion part; 335. Second expansion part; 336. Positioning hole; 4. Sealing ring; 41. Ring body; 42. Sealing frame; 43. Sealing part. Detailed Implementation

[0035] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore detailed descriptions of them will be omitted. Furthermore, the drawings are merely illustrative of this disclosure and are not necessarily drawn to scale.

[0036] Although relative terms such as "up" and "down" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples shown in the accompanying drawings. It is understood that if the device of the icon is flipped upside down, the component described as "up" will become the component described as "down." When a structure is "up" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0037] The terms “a,” “one,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” and “third,” etc., are used only as markers and are not a limitation on the number of objects.

[0038] This disclosure provides a stator assembly, see [link to previous section] Figures 1-5The system includes a core 1, a heat exchange ring 2, and a connecting assembly 3. The core 1 has multiple heat exchange channels 11 spaced circumferentially along its length, extending axially along the core 1. The heat exchange ring 2 is located at the end of the core 1 and has multiple liquid inlet channels 21 and multiple liquid outlet channels 22 alternately distributed circumferentially along its length. The liquid inlet channels 21 and liquid outlet channels 22 are respectively connected to the heat exchange channels 11. The connecting assembly 3 includes a locking block 31, a locking groove 32, and a spring piece 33. The locking block 31 is located on the heat exchange ring 2, the locking groove 32 is located on the core 1, and the spring piece 33 is located on the locking block 31. The locking block 31 can engage with the locking groove 32, and the spring piece 33 is used to apply a compressive force to the side wall of the locking groove 32, i.e., the spring piece 33 and the locking groove 32 are in an interference fit.

[0039] In this way, oil can be introduced into the inlet channel 21, allowing it to enter the heat exchange channel 11 inside the core 1 and finally flow out from the outlet channel 22. During the flow of the oil in the heat exchange channel 11, it can exchange heat with the core 1 (e.g., cooling), which is beneficial to the normal operation of the stator assembly. In addition, by the cooperation of the locking block 31 and the locking slot 32, the spring piece 33 applies a compressive force to the side wall of the locking slot 32, which improves the connection performance between the heat exchange ring 2 and the core 1, reduces the possibility of the core 1 and the heat exchange ring 2 falling off, and improves the structural stability and reliability of the stator assembly.

[0040] It should be noted that, in this disclosure, the card slot 32 has a bottom wall and two oppositely arranged side walls, which are connected by the bottom wall.

[0041] In one embodiment of this disclosure, see Figure 3 and Figure 4 The locking block 31 is fixedly connected to the heat exchange ring 2, and the locking groove 32 is provided in the core 1. For example, the locking block 31 and the heat exchange ring 2 are integrally thermoplastic molded to increase the connection performance between the locking block 31 and the heat exchange ring 2, simplify the production process, and improve production efficiency. As another example, the locking block 31 and the heat exchange ring 2 can be fixedly connected by means of bonding, bolting, etc.

[0042] In one embodiment of this disclosure, the core 1 may include a plurality of stacked stamped sheets, which may be annular, each stamped sheet having a plurality of heat exchange holes spaced apart along its circumference. In two adjacent stamped sheets, the heat exchange holes of one stamped sheet are connected to the heat exchange holes of the other stamped sheet to form a heat exchange channel 11 of the core 1.

[0043] In one embodiment of this disclosure, see Figure 3 The core 1 may have windings, and the core 1 has a plurality of mounting holes 12 spaced apart along its circumference, and the windings may be installed in the mounting holes 12.

[0044] In one embodiment of this disclosure, see Figure 1 , Figure 5 There can be two heat exchange rings 2. The core 1 is located between the two heat exchange rings 2 and is coaxially arranged with the two heat exchange rings 2. One liquid inlet channel 21 of one heat exchange ring 2 is connected to one liquid outlet channel 22 of the other heat exchange ring 2 through one or more heat exchange channels 11.

[0045] In one embodiment of this disclosure, a heat exchange ring 2 and a core 1 can be connected by one or more connecting components 3. For example, the number of connecting components 3 can be one, two, three, four, etc. Multiple connecting components 3 can be evenly distributed along the circumference of the core 1 to improve the connection performance.

[0046] In one embodiment of this disclosure, see Figure 3 , Figure 5 , Figure 6 The spring piece 33 may include a mounting portion 331, a first elastic portion 332, and a second elastic portion 333. The first elastic portion 332 and the second elastic portion 333 are connected to the mounting portion 331 by welding, integral molding, or other methods. A clearance groove is provided between the first elastic portion 332 and the second elastic portion 333. The mounting portion 331 is fixedly connected to the locking block 31. The sides of the first elastic portion 332 and the second elastic portion 333 that are far apart from each other are used to apply compressive force to the sidewall of the locking groove 32. Thus, by applying compressive force to the sidewall of the locking groove 32 by the first elastic portion 332 and the second elastic portion 333, the connection performance between the heat exchange ring 2 and the core 1 can be improved, reducing the possibility of the core 1 detaching from the heat exchange ring 2. Furthermore, the clearance groove between the first elastic portion 332 and the second elastic portion 333 allows the first elastic portion 332 and the second elastic portion 333 to move closer to each other during the insertion of the spring piece 33 into the locking groove 32, facilitating the connection between the spring piece 33 and the locking groove 32.

[0047] In one embodiment of this disclosure, the spring 33 can be made of a high-strength and high-toughness metal material, such as spring steel.

[0048] In one embodiment of this disclosure, the card block 31 can extend along the axial direction of the core 1, the card slot 32 is disposed through the core 1 in a direction away from the axis of the core 1, and the spring piece 33 can extend along the axial direction of the core 1.

[0049] In one embodiment of this disclosure, the card block 31 and the card slot 32 can be in a clearance fit or an overfit fit to reduce the scraping of the core 1 by the card block 31.

[0050] In one embodiment of this disclosure, see Figure 3 , Figure 5 , Figure 6The first elastic portion 332 has a first expansion portion 334 at the end away from the mounting portion 331, and the first expansion portion 334 protrudes in the direction away from the second elastic portion 333. The second elastic portion 333 has a second expansion portion 335 at the end away from the mounting portion 331, and the second expansion portion 335 protrudes in the direction away from the first elastic portion 332. Thus, when the locking block 31 is engaged in the locking groove 32, the first expansion portion 334 and the second expansion portion 335 can apply a compressive force to the side wall of the locking groove 32. Compared to the method where the entire first elastic portion 332 and the second elastic portion 333 abut against the side wall of the locking groove 32, the contact area is reduced, which facilitates the engagement of the spring piece 33 and the locking groove 32 and reduces the installation difficulty.

[0051] In one embodiment of this disclosure, see Figure 5 , Figure 6 The locking block 31 has a positioning post 311, and the mounting part 331 has a positioning hole 336. The positioning post 311 can cooperate with the positioning hole 336. In this way, by cooperating with the positioning post 311 and the positioning hole 336, the mounting part 331 can be positioned on the locking block 31, which facilitates the installation of the spring piece 33 and the locking block 31.

[0052] In one embodiment of this disclosure, there can be two positioning pins 311, which can be distributed at intervals along the extension direction of the locking block 31. Correspondingly, there can be two positioning holes 336, which can be distributed at intervals along the extension direction of the spring piece 33. One positioning pin 311 corresponds to one positioning hole 336. The locking block 31 and the mounting part 331 can be thermally riveted together by the positioning pins 311.

[0053] In one embodiment of this disclosure, the mounting part 331 and the locking block 31 can be fixedly connected by means of bonding, welding, bolting or other methods.

[0054] In one embodiment of this disclosure, see Figure 4 , Figure 5 The heat exchange ring 2 has multiple protrusions 23, which are spaced apart circumferentially along the heat exchange ring 2. An inlet channel 21 is formed between two adjacent protrusions 23, and an outlet channel 22 is located inside the protrusions 23. The inner circumferential wall of the heat exchange ring 2 has an outlet hole 24 that communicates with the outlet channel 22. In this way, an inlet channel 21 and an outlet channel 22 can be formed on the heat exchange ring 2 through multiple protrusions. In two heat exchange rings 2, one inlet channel 21 of one heat exchange ring 2 is connected to one outlet channel 22 of the other heat exchange ring 2 through one or more heat exchange channels 11. Oil can flow into the heat exchange channel 11 through the inlet channel 21, flow into the outlet channel 22 after heat exchange, and finally flow out from the outlet hole 24. Heat exchange can be performed on the winding end of the core 1 by spraying oil, so as to facilitate heat exchange on the core 1 by oil.

[0055] In one embodiment of this disclosure, see Figure 5 The locking block 31 is disposed in a liquid inlet channel 21, and the locking groove 32 is connected to the heat exchange channel 11. Thus, placing the locking block 31 in the liquid inlet channel 21 facilitates its installation due to the large accommodating space of the channel. Furthermore, the connection between the locking groove 32 and the heat exchange channel 11 ensures that the heat exchange channel 11 with the locking block 31 still functions to guide oil flow, reducing the impact of the locking block 31 on the heat exchange effect of the core 1.

[0056] In one embodiment of this disclosure, see Figure 1 , Figure 5 , Figure 7 The stator assembly also includes a sealing ring 4 disposed between the core 1 and the heat exchange ring 2. The sealing ring 4 includes a ring body 41 and multiple sealing frames 42. The multiple sealing frames 42 are distributed circumferentially around the outer peripheral wall of the ring body 41. Each sealing frame 42 has a through hole and is connected to a protrusion 23, and the through hole communicates with the liquid inlet channel 21. Thus, the sealing ring 4 can seal the connection between the core 1 and the heat exchange ring 2, reducing the probability of oil leakage between the core 1 and the heat exchange ring 2, and improving the reliability of the stator assembly. Furthermore, by sealing the protrusion 23 with the sealing frames 42, oil from the liquid inlet channel 21 of the same heat exchange ring 2 can be prevented from flowing into the liquid outlet channel 22, ensuring the stability of heat exchange in the core 1.

[0057] In one embodiment of this disclosure, see Figure 3 , Figure 5 , Figure 7 The sealing ring 4 also includes a sealing part 43, which is integrally connected to the ring body 41 and located between two adjacent sealing frames 42. The sealing part 43 has a clearance cavity for avoiding the locking block 31, and the sealing part 43 is arranged in a "U" shape. In this way, the sealing part 43 can seal the part of the core body 1 where the locking groove 32 is opened, thereby reducing oil leakage.

[0058] In one embodiment of this disclosure, participants Figure 3 , Figure 4 , Figure 5 , Figure 7The end of the locking block 31 has a hook 312, which is integrally thermoformed with the locking block 31. The hook 312 is used to engage the sealing ring 4. Specifically, the hook 312 can engage with the sealing part 43, so that the sealing part 43 is located between the hook 312 and the heat exchange ring 2. In this way, during the installation process of the heat exchange ring 2 and the core 1, the sealing part 43 can be hooked onto the hook 312 first, and then the heat exchange ring 2 and the core 1 hooked with the sealing ring 4 can be fixed by the cooperation of the locking block 31 and the locking groove 32. No additional support is needed for the sealing ring 4, saving steps and improving production efficiency.

[0059] This disclosure also provides an electric motor, including a housing and a stator assembly as described in any of the above embodiments. The stator assembly is located within the housing, which has an oil injection hole for introducing oil into the inlet channel 21 of the heat exchange ring 2. This motor has all the beneficial effects of the aforementioned stator assembly, which will not be elaborated upon here.

[0060] This disclosure also provides a vehicle including the aforementioned electric motor. The vehicle can be a new energy vehicle, a hybrid vehicle, or a conventional fuel vehicle. This vehicle possesses all the beneficial effects of the aforementioned electric motor, which will not be elaborated upon here.

[0061] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A stator assembly characterized by, include: The core (1) has a plurality of heat exchange channels (11) spaced apart circumferentially along the core (1) and the heat exchange channels (11) extend axially along the core (1); A heat exchange ring (2) is located at the end of the core (1) and has multiple liquid inlet channels (21) and multiple liquid outlet channels (22) that are alternately distributed along the circumference of the heat exchange ring (2). The liquid inlet channels (21) and the liquid outlet channels (22) are respectively connected to the heat exchange channel (11). The connecting component (3) includes a locking block (31), a slot (32) and a spring (33). The locking block (31) is located on the heat exchange ring (2), the slot (32) is located on the core (1), and the spring (33) is located on the locking block (31). The spring (33) is used to apply a pressing force to the side wall of the slot (32).

2. The stator assembly of claim 1, wherein, The spring (33) includes a mounting part (331), a first elastic part (332) and a second elastic part (333). The first elastic part (332) and the second elastic part (333) are respectively connected to the mounting part (331), and there is a clearance groove between the first elastic part (332) and the second elastic part (333). The mounting part (331) is connected to the locking block (31). The side of the first elastic part (332) and the second elastic part (333) that is far away from each other is used to apply a pressing force to the side wall of the locking groove (32).

3. The stator assembly of claim 2, wherein, The first elastic portion (332) has a first expansion portion (334) at one end away from the mounting portion (331), and the first expansion portion (334) protrudes toward the first elastic portion (332) in a direction away from the second elastic portion (333); The second elastic portion (333) has a second expansion portion (335) at one end away from the mounting portion (331), and the second expansion portion (335) protrudes toward the second elastic portion (333) away from the first elastic portion (332).

4. The stator assembly of claim 2, wherein, The card block (31) has a positioning post (311), and the mounting part (331) has a positioning hole (336). The positioning post (311) can cooperate with the positioning hole (336).

5. The stator assembly according to any one of claims 1 to 4, characterized in that, The heat exchange ring (2) has a plurality of protrusions (23), which are distributed circumferentially along the heat exchange ring (2). The liquid inlet channel (21) is formed between two adjacent protrusions (23), and the liquid outlet channel (22) is located inside the protrusions (23). The inner peripheral wall of the heat exchange ring (2) has a liquid outlet hole (24) communicating with the liquid outlet channel (22).

6. The stator assembly of claim 5, wherein, The card block (31) is disposed in the liquid inlet channel (21), and the card slot (32) is connected to the heat exchange channel (11).

7. The stator assembly according to claim 5, characterized in that, The stator assembly also includes a sealing ring (4) disposed between the core (1) and the heat exchange ring (2); The sealing ring (4) includes a ring body (41) and a plurality of sealing frames (42). The plurality of sealing frames (42) are distributed at intervals along the circumference of the ring body (41) on the outer peripheral wall of the ring body (41). The sealing frame (42) has a through hole and is connected to the protrusion (23). The through hole is connected to the liquid inlet channel (21).

8. The stator assembly according to claim 7, characterized in that, The sealing ring (4) further includes a sealing part (43), which is connected to the ring body (41) and located between two adjacent sealing frames (42). The sealing part (43) has a clearance cavity for avoiding the card block (31).

9. The stator assembly of claim 7, wherein, The end of the locking block (31) has a hook (312) for engaging the sealing ring (4).

10. A stator assembly according to any one of claims 1 to 4, wherein The card block (31) and the heat exchange ring (2) are integrally thermoplastic molded.

11. An electric machine characterized by Includes the stator assembly as described in any one of claims 1 to 10.

12. A vehicle characterized by comprising: Includes the motor as described in claim 11.

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