Motor stator, motor, power assembly and vehicle

Abstract

The invention discloses a motor stator, a motor, a power assembly and a vehicle, the motor stator comprises a stator iron core, an insulation sleeve, a sealing strip and a stator winding, and the stator iron core is provided with a stator groove; the insulation sleeve is inserted into the stator groove, the sealing strip and the insulation sleeve are integrally arranged, the sealing strip and the insulation sleeve define a mounting hole, the mounting hole is located in the stator groove, the sealing strip is connected with the two adjacent stator tooth parts so as to block the groove opening of the stator groove, and the stator winding is inserted into the mounting hole. According to the invention, the insulating sleeve and the sealing strip define the mounting hole, and the stator winding is inserted into the mounting hole, so that the insulation between the stator winding and the stator core is realized; the opening of the stator groove is blocked by the sealing strip, and the insulating sleeve and the sealing strip are integrally arranged, so that the reliability of connection between the insulating sleeve and the sealing strip and the stator core is improved, the sealing effect on the motor stator is improved, and a cooling medium is prevented from leaking from the motor stator.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a motor stator, a motor, a powertrain and a vehicle. Background Art

[0002] With the rapid development of new energy vehicle technology, the performance requirements for motors are getting higher and higher. The motor includes a motor stator and a motor rotor. The motor stator is the stationary part of the motor. The motor stator includes a stator core and a stator winding. The functions of the stator core include forming a magnetic flux path and embedding the stator winding. The stator core of the existing motor is generally made of silicon steel punchings with a high silicon content, which are stacked in groups. Losses will occur during the operation of the motor. These losses will serve as a heat source to heat the motor components, causing the motor temperature to rise.

[0003] In the prior art, when the motor stator is cooled by spraying cooling medium or immersing cooling medium, the sealing effect of the motor stator is poor, which easily leads to leakage of cooling medium. Summary of the invention

[0004] The purpose of the present application is to provide a motor stator, a motor, a power assembly and a vehicle to solve the problem that the motor stator has poor sealing effect and is prone to leakage of cooling medium.

[0005] To achieve the purpose of this application, this application provides the following technical solutions:

[0006] In a first aspect, the present application provides a motor stator, comprising:

[0007] A stator core having stator slots;

[0008] An insulating sleeve, inserted into the stator slot;

[0009] A sealing strip is integrally provided with the insulating sleeve, wherein the sealing strip and the insulating sleeve enclose a mounting hole, wherein the mounting hole extends along the axial direction of the stator core, and the mounting hole is located in the stator slot, and the sealing strip blocks the notch of the stator slot;

[0010] The stator winding is inserted into the mounting hole.

[0011] In one embodiment, the stator core comprises a stator yoke and a plurality of stator teeth, the plurality of stator teeth are convexly arranged on the inner wall of the stator yoke at intervals along the circumferential direction of the stator core, each stator tooth extends along the axial direction of the stator core, the stator slot is formed between two adjacent stator teeth, and the sealing strip is connected to the adjacent stator teeth to seal the notch of the stator slot;

[0012] The insulating sleeve comprises a first insulating portion, a second insulating portion and a third insulating portion which are connected in sequence, the first insulating portion and the third insulating portion are respectively connected to two side walls of two adjacent stator teeth portions which are close to each other, and the second insulating portion is connected to an inner wall of the stator yoke portion located between two adjacent stator teeth portions;

[0013] One end of the first insulating portion away from the second insulating portion and one end of the third insulating portion away from the second insulating portion are both connected to the sealing strip.

[0014] In one embodiment, each of the stator teeth includes a tooth root portion and a stop portion, the tooth root portion is connected to the inner wall of the stator yoke portion, the stop portion is connected to an end of the tooth root portion away from the stator yoke portion, and a notch of the stator slot is formed between two adjacent stop portions;

[0015] The sealing strip is connected to two side walls of two adjacent stop parts that are close to each other.

[0016] In one embodiment, an end surface of the sealing strip away from the stator yoke portion and an end surface of the stop portion away from the tooth root portion are on the same plane.

[0017] In one embodiment, the motor stator further comprises an oil collecting ring, which is arranged on one axial side of the stator core, and the area between the oil collecting ring and the one axial side of the stator core forms an accommodating cavity, one end of the stator winding is accommodated in the accommodating cavity, and the mounting hole is communicated with the accommodating cavity; a sealing structure is provided between the oil collecting ring and the stator core, and / or,

[0018] A sealing structure is provided between the oil collecting ring and the sealing strip.

[0019] In one embodiment, the sealing strip is connected to the stator core at one axial end face and the stator tooth portion at one axial end face of the stator core to form an abutment surface;

[0020] The sealing structure comprises a sealing ring, and the sealing ring abuts between an end surface of the oil collecting ring along the axial direction of the stator core and the abutting surface.

[0021] In one embodiment, the motor stator further comprises a connecting ring, a plurality of stator slots are provided, and the plurality of stator slots are arranged at intervals along the circumferential direction of the stator core, a plurality of insulating sleeves are provided, and a plurality of sealing strips are provided, and each stator slot is provided with one insulating sleeve and one sealing strip;

[0022] The connecting ring is connected to the same end of the plurality of sealing strips along the axial direction of the stator core.

[0023] In one embodiment, the oil collecting ring is provided with a first convex edge on one end surface along the axial direction of the stator core, and the first convex edge and the connecting ring are spaced apart along the radial direction of the stator core;

[0024] The sealing structure comprises a sealing ring, and the sealing ring is abutted between the first protrusion and the connecting ring.

[0025] In one embodiment, the motor stator further comprises a connecting ring, a plurality of stator slots are provided, and the plurality of stator slots are arranged at intervals along the circumferential direction of the stator core, a plurality of insulating sleeves are provided, and a plurality of sealing strips are provided, and each stator slot is provided with one insulating sleeve and one sealing strip;

[0026] The connecting ring is connected to the same end of the plurality of sealing strips along the axial direction of the stator core;

[0027] The sealing structure comprises a sealing ring. A first groove is provided on an end face of the oil collecting ring along the axial direction of the stator core. The sealing ring is arranged in the first groove, and the sealing ring abuts against an end face of the connecting ring along the axial direction of the stator core.

[0028] In one embodiment, the motor stator further comprises a connecting ring, a plurality of stator slots are provided, and the plurality of stator slots are arranged at intervals along the circumferential direction of the stator core, a plurality of insulating sleeves are provided, and a plurality of sealing strips are provided, and each stator slot is provided with one insulating sleeve and one sealing strip;

[0029] The connecting ring is connected to the same end of the plurality of sealing strips along the axial direction of the stator core;

[0030] The oil collecting ring is provided with a second convex edge on one end face along the axial direction of the stator core, the connecting ring is provided with a second groove on the end face along the axial direction of the stator core, and the second convex edge is arranged in the second groove.

[0031] In one embodiment, the sealing structure includes a sealing ring, which is disposed in the second groove and abuts against the second protrusion.

[0032] In one embodiment, two oil collecting rings are provided, two connecting rings are provided, the two oil collecting rings are respectively provided on both sides of the stator core along the axial direction, and the two connecting rings are respectively connected to both ends of the plurality of sealing strips along the axial direction of the stator core.

[0033] In one embodiment, the two connecting rings are integrally arranged with the plurality of insulating sleeves and the plurality of sealing strips.

[0034] In a second aspect, the present application further provides a motor, comprising a housing and a motor stator as described in the first aspect, wherein the stator core is accommodated in the housing.

[0035] In a third aspect, the present application also provides a powertrain, comprising the motor as described in the second aspect.

[0036] In a fourth aspect, the present application also provides a vehicle, comprising the motor as described in the second aspect or the powertrain as described in the third aspect.

[0037] In the present application, an insulating sleeve is arranged in the stator slot, and the insulating sleeve and the sealing strip form a mounting hole, and the stator winding is inserted into the mounting hole, thereby achieving insulation between the stator winding and the stator core; the notch of the stator slot is sealed by the sealing strip to inhibit the leakage of the cooling medium from the motor stator; and the insulating sleeve and the sealing strip are arranged integrally to improve the reliability of the connection between the insulating sleeve and the sealing strip and the stator core, thereby improving the sealing effect of the motor stator. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 A partial structural cross-sectional view of a motor stator according to an embodiment of the present application;

[0040] Figure 2 A top view of a stator core, an insulating sleeve and a sealing strip according to an embodiment of the present application;

[0041] Figure 3 A top view of a stator core, an insulating sleeve, a sealing strip, and a stator winding according to an embodiment of the present application;

[0042] Figure 4 A partial structural cross-sectional view of a motor stator according to another embodiment of the present application;

[0043] Figure 5 A three-dimensional diagram of an insulating sleeve, a sealing strip, a first connecting ring and a second connecting ring according to an embodiment of the present application;

[0044] Figure 6 A three-dimensional diagram of a plurality of insulating sleeves, a plurality of sealing strips, a first connecting ring and a second connecting ring according to an embodiment of the present application;

[0045] Figure 7This is a schematic structural diagram of a sealing strip, a first connecting ring, a second connecting ring and a first oil collecting ring in a first embodiment of the present application;

[0046] Figure 8 This is a schematic structural diagram of a sealing strip, a first connecting ring, a second connecting ring and a first oil collecting ring according to a second embodiment of the present application;

[0047] Fig. 9 It is a schematic structural diagram of a sealing strip, a first connecting ring, a second connecting ring and a first oil collecting ring of a third embodiment of the present application.

[0048] Description of reference numerals:

[0049] 100, stator core; 110, stator yoke; 120, stator tooth; 121, tooth root; 122, stopper; 130, stator slot; 131, notch; 141, first abutment surface; 142, second abutment surface; 200, insulating sleeve; 210, first insulating portion; 220, second insulating portion; 230, third insulating portion; 300, sealing strip; 310, mounting hole; 400, stator winding; 510, first oil collecting ring; 511, first convex edge; 512, first groove; 513, second convex edge; 520, second oil collecting ring; 530, housing; 540, accommodating chamber; 550, cooling channel; 610, first sealing ring; 620, second sealing ring; 710, first connecting ring; 720, second connecting ring; 721, second groove. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0051] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0052] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this application and in the specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this application includes any and all combinations of one or more of the related listed items.

[0053] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0054] The present application provides a vehicle, the vehicle includes a powertrain and a frame, the powertrain is connected to the frame. The powertrain provides power to the vehicle to drive the vehicle. The vehicle includes a fuel vehicle, a pure electric vehicle and a hybrid vehicle.

[0055] In pure electric vehicles and hybrid electric vehicles, the motor is the main power source of the vehicle, and the performance of the motor is an important factor affecting the power of the vehicle. Amorphous materials such as iron, silicon, and boron have the advantage of low iron loss and are used in motors, but due to the poor thermal conductivity and low thermal expansion coefficient of amorphous materials themselves, there are many problems. During the operation of the motor, the motor stator itself generates a lot of Joule heat, which causes the motor performance to deteriorate.

[0056] refer to Figure 1 The present application provides a motor, which includes a housing 530, a motor stator and a motor rotor. The motor stator is contained in the housing 530, and the motor rotor is disposed in the motor stator. The main function of the motor stator is to generate a rotating magnetic field, and the main function of the motor rotor is to be cut by magnetic lines of force in the rotating magnetic field and then output current converted into mechanical energy. The motor stator includes a stator core 100 and a stator winding 400. The stator core 100 is formed by stacking silicon steel punchings with a high silicon content in groups. The stator winding 400 includes a plurality of turns of coils, which are wound on the stator core according to a specific rule to form a desired magnetic field distribution. At the same time, the stator winding 400 also includes lead wires, which are connected to the coils. These lead wires are used to connect the stator winding 400 to an external power supply or a control system to ensure that the current can flow smoothly into the winding, thereby driving the operation of the motor. Losses will be generated during the operation of the motor, and these losses will serve as a heat source to heat the motor components, causing the motor temperature to rise.

[0057] In the prior art, when the motor stator is cooled by spraying cooling medium or immersing cooling medium, the sealing effect of the motor stator is poor, which easily leads to leakage of cooling medium.

[0058] refer to Figure 1 , Figure 2 and Figure 3The present application provides a motor stator, including a stator core 100, an insulating sleeve 200, a sealing strip 300 and a stator winding 400. The stator core 100 has a stator slot 130, which extends along the axial direction of the stator core 100 and has a notch 131 radially inward of the stator core 100; the insulating sleeve 200 is inserted into the stator slot 130, the sealing strip 300 and the insulating sleeve 200 are integrally arranged, the sealing strip 300 and the insulating sleeve 200 form a mounting hole 310, the mounting hole 310 extends along the axial direction of the stator core 100, and the mounting hole 310 is located in the stator slot 130, the sealing strip 300 blocks the notch 131 of the stator slot 130, and the stator winding 400 is inserted into the mounting hole 310. In the present application, an insulating sleeve 200 is arranged in the stator slot 130, and the insulating sleeve 200 and the sealing strip 300 form a mounting hole 310, and the stator winding 400 is inserted into the mounting hole 310, thereby achieving insulation between the stator winding 400 and the stator core 100; the sealing strip 300 is connected to the stator core 100 to seal the notch 131 of the stator slot 130, to achieve radial sealing of the stator core 100, and to inhibit leakage of the cooling medium from the motor stator; and the insulating sleeve 200 and the sealing strip 300 are integrally arranged to improve the reliability of the connection between the insulating sleeve 200 and the sealing strip 300 and the stator core 100, thereby improving the sealing effect on the motor stator.

[0059] The stator core 100 includes a stator yoke 110 and a plurality of stator teeth 120. The stator yoke 110 is a ring-shaped or approximately ring-shaped structure with thickness. The plurality of stator teeth 120 are protruded on the inner wall of the stator yoke 110 at intervals along the circumference of the stator core 100. Each stator tooth 120 extends along the axial direction of the stator core 100. A stator slot 130 is formed between two adjacent stator teeth 120. The sealing strip 300 is connected to two adjacent stator teeth 120 to seal the notch 131 of the stator slot 130, thereby inhibiting leakage of cooling medium from the notch 131 of the stator slot 130.

[0060] The insulating sleeve 200 includes a first insulating portion 210, a second insulating portion 220, and a third insulating portion 230 connected in sequence, and one end of the first insulating portion 210 away from the second insulating portion 220 and one end of the third insulating portion 230 away from the second insulating portion 220 are both connected to the sealing strip 300. Specifically, the insulating sleeve 200 provided in the embodiment of the present application is generally U-shaped, and the first insulating portion 210 and the third insulating portion 230 are both connected to the sealing strip 300 to enclose a mounting hole 310 for mounting the stator winding 400, thereby improving the sealing of the stator winding 400, and when a cooling medium flows in the mounting hole 310, the leakage of the cooling medium can be suppressed.

[0061] In a possible implementation, the insulating sleeve 200 is in a “mouth” shape, the mounting hole 310 can be surrounded by the insulating sleeve 200 alone, and the sealing strip 300 is integrally provided on the outer wall of the insulating sleeve 200 to seal the notch 131 of the stator slot 130 .

[0062] In the motor stator provided in the present application, the first insulating portion 210 and the third insulating portion 230 are respectively connected to the two side walls of the two adjacent stator teeth 120, and the second insulating portion 220 is connected to the inner wall of the stator yoke 110 located between the two adjacent stator teeth 120. Specifically, the inner wall of the stator yoke 110 located between the two adjacent stator teeth 120 and the two side walls of the two adjacent stator teeth 120 form the slot wall of the stator slot 130, and the first insulating portion 210, the second insulating portion 220, the third insulating portion 230 and the sealing strip 300 are all integrally injection molded on the slot wall of the stator slot 130 to improve the stability of the connection between the insulating sleeve 200 and the sealing strip 300 and the stator core 100, and improve the sealing of the motor stator. At the same time, the insulating sleeve 200 and the sealing member are integrally injection molded to reduce the number of motor stator parts and reduce the difficulty of installing the insulating sleeve 200 and the sealing member.

[0063] The insulating sleeve 200 and the sealing strip 300 may be made of rubber, silicone, polytetrafluoroethylene, polyimide, polyethylene, polyvinyl chloride, polypropylene, etc.

[0064] Each stator tooth 120 in the stator core 100 includes a tooth root 121 and a stopper 122, the tooth root 121 is connected to the inner wall of the stator yoke 110, the stopper 122 is connected to one end of the tooth root 121 away from the stator yoke 110, and a notch 131 of the stator slot 130 is formed between two adjacent stoppers 122; the sealing strip 300 is connected to two side walls of two adjacent stoppers 122 that are close to each other. Specifically, the insulating sleeve 200 is located between two adjacent tooth roots 121, and the spacing between the two adjacent tooth roots 121 is greater than the spacing between the two adjacent stoppers 122, so as to form a notch 131 at one end of two adjacent stator teeth 120, and the sealing strip 300 is filled between the two adjacent stoppers 122, thereby achieving the sealing of the notch 131.

[0065] The end face of the sealing strip 300 away from the stator yoke 110 and the end face of the stopper 122 away from the tooth root 121 are on the same plane, and the same plane may be the same arc surface or the same plane. Optionally, the sealing strip 300 is connected between two adjacent stoppers 122, and the end face of the sealing strip 300 is connected to the end face of the tooth root 121 to form a complete arc surface, so that the gap between the stator core 100 and the motor rotor is consistent, and at the same time, the cooling medium can be prevented from leaking and flowing into the gap between the stator core 100 and the motor rotor.

[0066] In the motor stator provided in the present application, the motor stator also includes an oil collecting ring, a sealing structure is provided between the oil collecting ring and the stator core 100, and / or a sealing structure is provided between the oil collecting ring and the sealing strip 300, so as to achieve sealing between the oil collecting ring and the stator core 100 and between the oil collecting ring and the sealing strip 300.

[0067] In one embodiment, two oil collecting rings are provided, and the two oil collecting rings are respectively a first oil collecting ring 510 and a second oil collecting ring 520. The first oil collecting ring 510 is provided on one side of the stator core 100 in the axial direction. The area between the first oil collecting ring 510 and one side of the stator core 100 forms an accommodating cavity 540, and the area between the second oil collecting ring 520 and the other side of the stator core 100 forms another accommodating cavity 540. The two ends of the stator winding 400 are respectively accommodated in the two accommodating cavities 540, and the mounting hole 310 is communicated with the two accommodating cavities 540. A cooling channel 550 is provided on the stator yoke 110 and penetrates the stator yoke 110 in the axial direction, and / or a cooling channel 550 is provided between the outer wall of the stator yoke 110 and the inner wall of the housing 530, and the cooling channel 550 is communicated with the two accommodating cavities 540. Specifically, the first oil collecting ring 510 and the second oil collecting ring 520 can be respectively connected to the two axial sides of the casing 530, so that the area between the first oil collecting ring 510 and the stator core 100 forms a accommodating cavity 540, and the area between the second oil collecting ring 520 and the stator core 100 forms another accommodating cavity 540; or the first oil collecting ring 510 and the second oil collecting ring 520 are both arranged inside the casing 530, and the first oil collecting ring 510 is directly sleeved on one axial side of the stator core 100, and the second oil collecting ring 520 is directly sleeved on the other axial side of the stator core 100, so that the first oil collecting ring 510 and the stator core 100 surround a accommodating cavity 540, and the second oil collecting ring 520 and the stator core 100 surround another accommodating cavity 540.

[0068] A cooling medium flows in the accommodating cavity 540 to cool the stator core 100 and the stator winding 400. The cooling medium can flow from one accommodating cavity 540 to another accommodating cavity 540 through the cooling channel 550 or the mounting hole 310 to further cool the stator core 100 and the stator winding 400. The cooling medium may be a cooling liquid or a cooling gas.

[0069] refer to Figure 2 and Figure 4The sealing structure includes a first sealing ring 610 and a second sealing ring 620, the sealing strip 300 extends along the axial direction of the stator core 100, one end face of the sealing strip 300 in the axial direction of the stator core 100 is connected with one end face of the stator tooth portion 120 in the axial direction of the stator core 100 to form a first abutting surface 141, and the other end face of the sealing strip 300 in the axial direction of the stator core 100 is connected with the other end face of the stator tooth portion 120 in the axial direction of the stator core 100 to form a second abutting surface 142; the first sealing ring 610 abuts between the inner wall of the first oil collecting ring 510 and the first abutting surface 141, and the second sealing ring 620 abuts between the inner wall of the second oil collecting ring 520 and the second abutting surface 142. Specifically, the first sealing ring 610 is arranged around the circumference of the stator core 100, and the second sealing ring 620 is arranged around the circumference of the stator core 100. The first sealing ring 610 is abutted against the first abutting surface 141, and the second sealing ring 620 is abutted against the second abutting surface 142, so that the projection of the mounting hole 310 in the axial direction of the stator core 100 is located in the accommodating cavity 540, so as to achieve sealing between the first oil collecting ring 510 and the stator core 100, and between the second oil collecting ring 520 and the stator core 100, thereby suppressing the leakage of the cooling medium in the accommodating cavity 540 or the mounting hole 310.

[0070] refer to Figure 4 , Figure 5 and Figure 6 The motor stator also includes a connecting ring, a plurality of stator slots 130 are arranged, and the plurality of stator slots 130 are arranged at intervals along the circumferential direction of the stator core 100, a plurality of insulating sleeves 200 are arranged, and a plurality of sealing strips 300 are arranged. An insulating sleeve 200 and a sealing strip 300 are provided in each stator slot 130 to achieve insulation of the stator winding 400 in each stator slot 130; the connecting ring is connected to the same end of the plurality of sealing strips 300 along the axial direction of the stator core 100 to connect the plurality of sealing strips 300 and the plurality of insulating sleeves 200 into one body, so as to facilitate the installation of the motor stator as a whole.

[0071] In one embodiment, the connecting ring includes a first connecting ring 710 and a second connecting ring 720 which are symmetrically arranged. The first connecting ring 710 and the second connecting ring 720 are respectively arranged along the circumference of the stator core 100. The first connecting ring 710 is connected to the multiple sealing strips 300 at one axial end of the stator core 100, and the second connecting ring 720 is connected to the multiple sealing strips 300 at the other axial end of the stator core 100 to fix the two ends of the multiple sealing strips 300, thereby improving the stability of the installation of the multiple sealing strips 300.

[0072] In the motor stator provided in the present application, the first connecting ring 710 and / or the second connecting ring 720, the multiple insulating sleeves 200, and the multiple sealing strips 300 can be integrally injection-molded and then installed in the stator core 100, or integrally injection-molded on the stator core 100, for easy installation. The first connecting ring 710 and the second connecting ring 720 provide support for the multiple sealing strips 300 and the insulating sleeves 200, thereby improving the overall structural strength.

[0073] In one embodiment, the first sealing ring 610 abuts between an end face of the first oil collecting ring 510 along the axial direction of the stator core 100 and an end face of the first connecting ring 710 along the axial direction of the stator core 100, and the second sealing ring 620 abuts between an end face of the second oil collecting ring 520 along the axial direction of the stator core 100 and an end face of the second connecting ring 720 along the axial direction of the stator core 100, so as to achieve radial sealing of the stator core 100.

[0074] refer to Figure 4 , Figure 6 and Figure 7 A first flange 511 is provided on one end face of the first oil collecting ring 510 along the axial direction of the stator core 100 and on one end face of the second oil collecting ring 520 along the axial direction of the stator core 100. The first flange 511 is arranged in a ring shape, and the first flange 511 and the first connecting ring 710 or the second connecting ring 720 are arranged at intervals along the radial direction of the stator core 100; the first sealing ring 610 abuts between the first flange 511 and the first connecting ring 710, and the second sealing ring 620 abuts between the first flange 511 and the second connecting ring 720. In the present application, the first sealing ring 610 is pressed against the first end of the stator core 100 and the first oil collecting ring 510 in the axial direction of the stator core 100, and the first sealing ring 610 is pressed against the first flange 511 and the first connecting ring 710 in the radial direction of the stator core 100, thereby achieving axial and radial sealing between the first oil collecting ring 510 and the stator core 100; the second oil collecting ring 520 is pressed against the second end of the stator core 100 and the second oil collecting ring 520 in the axial direction of the stator core 100, and the second sealing ring 620 is pressed against the first flange 511 and the second connecting ring 720 in the radial direction of the stator core 100, thereby achieving axial and radial sealing between the second oil collecting ring 520 and the stator core 100, thereby further improving the sealing of the motor stator.

[0075] refer to Figure 8 ,and Figure 7In comparison, one axial end face of the first connecting ring 710 and one axial end face of the sealing strip 300 are on the same plane, and one axial end face of the second connecting ring 720 and one axial end face of the stator core 100 are on the same plane, so as to reduce the risk of breakage of the first connecting ring 710 and the second connecting ring 720 during transportation. A first groove 512 is provided on one end face of the first oil collecting ring 510 and one end face of the second oil collecting ring 520 along the axial direction of the stator core 100, and the first groove 512 is arranged in an annular shape; the first sealing ring 610 is arranged in the first groove 512 on the first oil collecting ring 510, and the first sealing ring 610 abuts against one end face of the first connecting ring 710 in the axial direction of the stator core 100; the second sealing ring 620 is arranged in the first groove 512 on the second oil collecting ring 520, and the second sealing ring 620 abuts against one end face of the second connecting ring 720 in the axial direction of the stator core 100. By arranging the first groove 512 on the first oil collecting ring 510 and the second oil collecting ring 520, the installation firmness of the first sealing ring 610 and the second sealing ring 620 is improved, thereby improving the sealing performance of the motor stator.

[0076] refer to Fig. 9 ,and Figure 7 In comparison, the first oil collecting ring 510 and the second oil collecting ring 520 are both provided with a second convex edge 513 on one end face in the axial direction of the stator core 100; the first connecting ring 710 and the second connecting ring 720 are both provided with a second groove 721 on one end face in the axial direction of the stator core 100, and the second convex edge 513 is arranged in the second groove 721. That is, the sealing between the first oil collecting ring 510 and the stator core 100, and between the second oil collecting ring 520 and the stator core 100 is achieved through the cooperation between the second convex edge 513 and the second groove 721. Among them, the second flange 513 can be directly tightly matched with the second groove 721; or the first sealing ring 610 is arranged in the second groove 721 on the first connecting ring 710, and the first sealing ring 610 abuts against the second flange 513, and the second sealing ring 620 is arranged in the second groove 721 on the second connecting ring 720, and the second sealing ring 620 abuts against the second flange 513, so as to further improve the sealing between the first oil collecting ring 510 and the stator core 100, and between the second oil collecting ring 520 and the stator core 100.

[0077] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship of the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0078] What is disclosed above is only a preferred embodiment of the present application, and it certainly cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiment and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A motor stator, characterized in that: include: A stator core having stator slots; An insulating sleeve, inserted into the stator slot; A sealing strip is integrally provided with the insulating sleeve, wherein the sealing strip and the insulating sleeve enclose a mounting hole, wherein the mounting hole extends along the axial direction of the stator core, and the mounting hole is located in the stator slot, and the sealing strip blocks a notch of the stator slot; The stator winding is inserted into the mounting hole.

2. The motor stator according to claim 1, characterized in that: The stator core comprises a stator yoke and a plurality of stator teeth, wherein the plurality of stator teeth are convexly arranged on the inner wall of the stator yoke at intervals along the circumferential direction of the stator core, each stator tooth extends along the axial direction of the stator core, the stator slot is formed between two adjacent stator teeth, and the sealing strip is connected to the adjacent stator teeth to seal the notch of the stator slot; The insulating sleeve comprises a first insulating portion, a second insulating portion and a third insulating portion which are connected in sequence, the first insulating portion and the third insulating portion are respectively connected to two side walls of two adjacent stator teeth portions which are close to each other, and the second insulating portion is connected to an inner wall of the stator yoke portion located between two adjacent stator teeth portions; One end of the first insulating portion away from the second insulating portion and one end of the third insulating portion away from the second insulating portion are both connected to the sealing strip.

3. The motor stator according to claim 2, characterized in that: Each of the stator teeth comprises a tooth root portion and a stop portion, wherein the tooth root portion is connected to the inner wall of the stator yoke portion, and the stop portion is connected to an end of the tooth root portion away from the stator yoke portion, and a notch of the stator slot is formed between two adjacent stop portions; The sealing strip is connected to two side walls of two adjacent stop parts that are close to each other.

4. The motor stator according to claim 3, characterized in that: An end surface of the sealing strip away from the stator yoke portion and an end surface of the stopper portion away from the tooth root portion are on the same plane.

5. The motor stator according to claim 2, characterized in that: The motor stator further comprises an oil collecting ring, which is arranged on one axial side of the stator core, and the area between the oil collecting ring and the one axial side of the stator core forms a receiving cavity, one end of the stator winding is received in the receiving cavity, and the mounting hole is communicated with the receiving cavity; a sealing structure is arranged between the oil collecting ring and the stator core, and / or, A sealing structure is provided between the oil collecting ring and the sealing strip.

6. The motor stator according to claim 5, characterized in that: The sealing strip is connected to one end surface of the stator core in the axial direction and the stator tooth portion is connected to one end surface of the stator core in the axial direction to form an abutment surface; The sealing structure comprises a sealing ring, and the sealing ring abuts between an end surface of the oil collecting ring along the axial direction of the stator core and the abutting surface.

7. The motor stator according to claim 5, characterized in that: The motor stator further comprises a connecting ring, a plurality of stator slots are provided, and the plurality of stator slots are arranged at intervals along the circumferential direction of the stator core, a plurality of insulating sleeves are provided, and a plurality of sealing strips are provided, and each stator slot is provided with one insulating sleeve and one sealing strip; The connecting ring is connected to the same end of the plurality of sealing strips along the axial direction of the stator core.

8. The motor stator according to claim 7, characterized in that: The oil collecting ring is provided with a first convex edge on one end surface along the axial direction of the stator core, and the first convex edge and the connecting ring are spaced apart in the radial direction of the stator core; The sealing structure comprises a sealing ring, and the sealing ring is abutted between the first protrusion and the connecting ring.

9. The motor stator according to claim 5, characterized in that: The motor stator further comprises a connecting ring, a plurality of stator slots are provided, and the plurality of stator slots are arranged at intervals along the circumferential direction of the stator core, a plurality of insulating sleeves are provided, and a plurality of sealing strips are provided, and each stator slot is provided with one insulating sleeve and one sealing strip; The connecting ring is connected to the same end of the plurality of sealing strips along the axial direction of the stator core; The sealing structure comprises a sealing ring. A first groove is provided on an end face of the oil collecting ring along the axial direction of the stator core. The sealing ring is arranged in the first groove, and the sealing ring abuts against an end face of the connecting ring along the axial direction of the stator core.

10. The motor stator according to claim 5, characterized in that: The motor stator further comprises a connecting ring, a plurality of stator slots are provided, and the plurality of stator slots are arranged at intervals along the circumferential direction of the stator core, a plurality of insulating sleeves are provided, and a plurality of sealing strips are provided, and each stator slot is provided with one insulating sleeve and one sealing strip; The connecting ring is connected to the same end of the plurality of sealing strips along the axial direction of the stator core; The oil collecting ring is provided with a second convex edge on one end face along the axial direction of the stator core, the connecting ring is provided with a second groove on the end face along the axial direction of the stator core, and the second convex edge is arranged in the second groove.

11. The motor stator according to claim 10, characterized in that: The sealing structure comprises a sealing ring, which is arranged in the second groove and abuts against the second convex edge.

12. The motor stator according to any one of claims 7 to 11, characterized in that: Two oil collecting rings are provided, and two connecting rings are provided. The two oil collecting rings are respectively provided on both sides of the stator core along the axial direction, and the two connecting rings are respectively connected to two ends of a plurality of sealing strips along the axial direction of the stator core.

13. The motor stator according to claim 12, characterized in that: The two connecting rings are integrally arranged with the plurality of insulating sleeves and the plurality of sealing strips.

14. A motor, characterized in that: A motor stator comprising a casing as described in any one of claims 1 to 13, wherein the stator core is accommodated in the casing.

15. A powertrain, characterized in that: Comprising the motor as claimed in claim 14.

16. A vehicle, characterized in that: Comprising the electric machine as claimed in claim 14 or the powertrain as claimed in claim 15.

Images