Sealing cover, motor, driving assembly and vehicle

Abstract

The invention provides a sealing cover, a motor, a driving assembly and a vehicle. The seal cover includes a first cylinder portion, a second cylinder portion, and a first annular plate portion. The second cylinder portion is located inside the first cylinder portion. The first annular plate portion is connected between the first cylinder portion and the second cylinder portion. And the first cylinder part, the first annular plate part and the second cylinder part are suitable for enclosing with the axial end part of the stator iron core to form a stator end part sealing cavity for accommodating a winding. And a mounting part is arranged on the second cylinder part. The mounting part is suitable for being connected to a machine shell. According to the invention, the structure is simplified, the structure of the stator assembly does not need to be changed, and the manufacturing difficulty and manufacturing cost can be reduced.

Description

Technical Field

[0001] The present invention generally relates to the technical field of motors, and more particularly to a sealing cover, a motor, a drive assembly and a vehicle. Background Art

[0002] The stator assembly of the motor is provided with a coil winding, which can be cooled by immersion in oil. To achieve immersion in oil cooling, the motor in the related art is provided with an end seal, which is surrounded by the stator assembly to form a sealed cavity, and the stator winding of the stator assembly is immersed in oil in the sealed cavity.

[0003] Among them, the end seals generally need to be fixed to the stator assembly to enclose a sealed cavity to achieve oil immersion cooling.

[0004] However, the end seal of the related art requires the structure of the stator assembly to be changed, which increases the manufacturing difficulty and manufacturing cost. Summary of the invention

[0005] A series of simplified concepts are introduced in the Summary of the Invention, which will be further described in detail in the Detailed Description of the Invention. The Summary of the Invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0006] In order to at least partially solve the above problems, the present invention provides a sealing cover in a first aspect.

[0007] The sealing cover comprises a first cylinder portion, a second cylinder portion and a first annular plate portion, wherein the second cylinder portion is located inside the first cylinder portion, and the first annular plate portion is connected between the first cylinder portion and the second cylinder portion;

[0008] The first barrel portion, the first annular plate portion and the second barrel portion are adapted to be surrounded with the axial end of the stator core to form a stator end sealed cavity for accommodating the winding;

[0009] The second barrel portion is provided with a mounting portion, and the mounting portion is suitable for being connected to the housing.

[0010] According to the sealing cover of the first aspect of the present invention, when applied to the motor, the first barrel, the first annular plate, and the second barrel are surrounded by the axial end of the stator core to form a stator end sealing cavity for accommodating the winding, so that the stator core can be sealed at the axial end of the stator core, which helps to immerse more parts of the stator assembly in the oil in the stator end sealing cavity and improve the heat dissipation effect of the stator assembly. By adopting this technical means, due to fewer parts, a simpler structure, and no need to change the structure of the stator core, the manufacturing difficulty and manufacturing cost are greatly reduced, so that it is not only suitable for mass production of new motor products, but also suitable for upgrading and transforming some motor products.

[0011] Optionally, an annular bearing seat is provided on the inner wall of the housing, the inner periphery of the bearing seat forms a bearing chamber for installing the bearing, and the mounting portion is suitable for supporting the outer periphery of the bearing seat.

[0012] Optionally, the mounting portion is suitable for fitting onto an inner wall of the housing.

[0013] Optionally, the sealing cover further includes a second annular plate portion, wherein the second annular plate portion is connected between the second cylinder portion and the mounting portion.

[0014] Optionally, the second annular plate portion is suitable for being fitted on the inner wall of the casing, or the second annular plate portion is suitable for being spaced apart from the inner wall of the casing.

[0015] Optionally, the second barrel portion is coaxially arranged with the first barrel portion; one end of the first barrel portion along its own axial direction is suitable for being connected to the housing;

[0016] One end of the second cylindrical portion along its axial direction is suitable for being connected to an axial end portion of the stator core.

[0017] Optionally, the sealing cover further comprises:

[0018] a third barrel portion, the third barrel portion being coaxially arranged with the second barrel portion, the third barrel portion being located inside the second barrel portion, the third barrel portion being adapted to be fixed to the outside of the bearing seat of the housing, and the third barrel portion constituting the mounting portion; and

[0019] A second annular plate portion is connected between the second cylindrical portion and the third cylindrical portion.

[0020] Optionally, the first annular plate portion is provided with an oil through hole, and the oil through hole is suitable for connecting to the oil collecting chamber of the motor and the stator end sealing chamber.

[0021] Optionally, the sealing cover is provided with an oil guide hole, and the oil guide hole is located at least one of the second annular plate portion and the second cylinder portion. When the sealing cover is installed to the motor, the oil guide hole is located at the lowest point of the connection between the second annular plate portion and the second cylinder portion, and the oil guide hole is suitable for connecting to the oil collecting chamber and the rotor end sealing chamber of the motor.

[0022] Optionally, the sealing cover is provided with a wire passing hole, and the wire passing hole is suitable for passing the lead wire of the stator winding.

[0023] Optionally, one end of the first cylindrical portion along its own axial direction constitutes a sealing abutment portion, and the sealing abutment portion is suitable for abutting against a sealing ring.

[0024] A second aspect of the present invention provides a motor, comprising:

[0025] chassis;

[0026] a stator assembly, the stator assembly being located inside the housing, the stator assembly comprising a stator core and a stator winding, the stator core being fixed to the housing; and

[0027] The above-mentioned sealing cover is arranged between the axial end of the stator core and the casing, the first cylinder portion, the first annular plate portion and the second cylinder portion and the axial end of the stator core are arranged to form a stator end sealing cavity for accommodating the stator winding, and the mounting portion is connected to the casing.

[0028] According to the motor of the second aspect of the present invention, by applying the above-mentioned sealing cover, the first barrel, the first annular plate, the second barrel and the axial end of the stator core are surrounded to form a stator end sealing cavity for accommodating the stator winding, so that the stator core can be sealed at the axial end of the stator core, which helps to immerse more parts of the stator assembly in the oil in the stator end sealing cavity and improve the heat dissipation effect of the stator assembly. By adopting this technical means, due to fewer parts, a simpler structure, and no need to change the structure of the stator core, the manufacturing difficulty and manufacturing cost are greatly reduced, so that it is not only suitable for mass production of new motor products, but also suitable for upgrading and transforming some motor products.

[0029] Optionally, the stator core comprises stator slots;

[0030] The electric machine includes a slot seal sealingly connected to a slot opening of the stator slot.

[0031] Optionally, one end of the first cylindrical portion along its own axial direction constitutes a sealing abutment portion;

[0032] The motor also includes:

[0033] A sealing ring is connected to the housing, the sealing ring is coaxially arranged with the sealing cover, and the sealing ring is connected to the sealing abutment portion to seal to the housing and the sealing cover.

[0034] Optionally, the casing comprises an oil inlet and an oil collecting chamber, the oil inlet is located at the upper part of the casing, and the oil collecting chamber is located at the bottom of the casing;

[0035] The yoke of the stator core comprises a yoke axial flow channel, the yoke axial flow channel is configured to penetrate the stator core along the axial direction of the stator core, and the yoke axial flow channel is connected to the oil inlet and the stator end sealing cavity;

[0036] An oil drain chamber is formed between the sealing cover and the casing, and the oil drain chamber is connected to the oil collecting chamber;

[0037] The sealing cover is provided with an oil through hole, and the oil through hole is connected to the oil drain cavity.

[0038] Optionally, the housing comprises a bearing seat, and the sealing cover is fixedly connected to the bearing seat;

[0039] The motor comprises:

[0040] A rotating shaft is rotatably connected to the inside of the housing, the rotating shaft is coaxially arranged with the stator core, the rotating shaft and the bearing seat are surrounded to form a bearing chamber, and the bearing chamber is connected to the oil drain chamber.

[0041] Optionally, the casing further includes a casing flow channel, wherein the casing flow channel is connected to the oil inlet and the bearing chamber.

[0042] Optionally, the motor further comprises:

[0043] A rotor assembly is fixed to the rotating shaft. The rotor assembly and the sealing cover are arranged to form a rotor end sealing cavity. The bearing chamber is connected to the oil drain cavity via the rotor end sealing cavity.

[0044] Optionally, an axial end of the rotating shaft is spaced apart from the housing to form a shaft end chamber, the shaft end chamber is connected to the bearing chamber, and the rotating shaft includes a shaft center chamber, the shaft center chamber is connected to the shaft end chamber.

[0045] Optionally, the housing comprises an end cover and a box body, and the end cover is connected to the box body;

[0046] The motor comprises a first sealing cover and a second sealing cover, wherein the first sealing cover is connected to the end cover and comprises a first sealing abutment portion continuously arranged along its circumferential direction, and the second sealing cover is connected to the box body and comprises a second sealing abutment portion continuously arranged along its circumferential direction;

[0047] The motor includes a first sealing ring and a second sealing ring, wherein the first sealing ring is sealingly connected to the first sealing abutment portion and the end cover, and the second sealing ring is sealingly connected to the second sealing abutment portion and the housing.

[0048] Optionally, the end cover comprises a first sealing groove, wherein the first sealing groove is adapted to accommodate the first sealing ring; and / or

[0049] The box body comprises a second sealing groove, and the second sealing groove is adapted to accommodate the second sealing ring.

[0050] A third aspect of the present invention provides a drive assembly, which includes the above-mentioned motor.

[0051] According to the drive assembly of the third aspect of the present invention, by applying the above-mentioned motor, it is possible to reduce parts, simplify the product structure, and reduce the manufacturing difficulty and manufacturing cost.

[0052] A fourth aspect of the present invention provides a vehicle, comprising the above-mentioned motor or the above-mentioned drive assembly.

[0053] According to the vehicle of the fourth aspect of the present invention, by applying the above motor or the above drive assembly, it is possible to reduce manufacturing costs and improve production efficiency. At the same time, due to the better heat dissipation performance of the motor, it is also possible to reduce the failure rate of the vehicle in terms of motor operation, ensuring that the motor can operate more stably with higher power. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The following drawings of the embodiments of the present invention are used as part of the present invention for understanding the present invention. The embodiments of the present invention and their description are shown in the drawings to explain the principles of the present invention. In the drawings,

[0055] Figure 1 A cross-sectional view of a motor according to a preferred embodiment of the present invention;

[0056] Figure 2 for Figure 1 A front view of a stator assembly without stator winding installed;

[0057] Figure 3 for Figure 1 A front view of the first sealing cover;

[0058] Figure 4for Figure 1 A cross-sectional view of the first sealing cover in FIG.

[0059] Figure 5 for Figure 1 A front view of the second sealing cover; and

[0060] Figure 6 for Figure 1 A cross-sectional view of the second sealing cover in FIG.

[0061] Description of reference numerals:

[0062] 100: Motor 100a: First stator end sealed cavity

[0063] 100b: Second stator end sealed cavity 100c: First rotor end sealed cavity

[0064] 100d: Second rotor end seal chamber 100e: First bearing chamber

[0065] 100f: Second bearing chamber 100g: First shaft end chamber

[0066] 100h: First row of oil chamber 100i: Second row of oil chamber

[0067] 100j: Second shaft end chamber 110: Housing

[0068] 111: End cover 111a: First shell flow channel

[0069] 111b: first axial flow channel 111c: first radial flow channel

[0070] 111d: First bearing seat 111e: First sealing groove

[0071] 111f: first connecting channel 111g: first opening

[0072] 112: Box 112a: Oil inlet

[0073] 112b: Oil collecting chamber 112c: Second housing flow passage

[0074] 112d: second axial flow channel 112e: second radial flow channel

[0075] 112f: Second bearing seat 112g: Second sealing groove

[0076] 112h: second connecting channel 112i: second opening

[0077] 120: stator assembly 121: stator core

[0078] 121a: axial flow channel of the yoke 121b: circumferential flow channel of the yoke

[0079] 121c: stator slot 122: stator winding

[0080] 130: Rotor assembly 131: Rotor core

[0081] 131a: magnet receiving chamber 132: rotor support

[0082] 140: First sealing cover 141: First cylinder

[0083] 141a: first seal contact portion 142: second tube portion

[0084] 142a: oil guide hole 143: third cylinder

[0085] 143a: first guide positioning portion 144: first annular plate portion

[0086] 144a: Oil hole 144b: Wire hole

[0087] 145: Second annular plate portion 150: Second sealing cover

[0088] 151: first tube portion 151a: second sealing contact portion

[0089] 152: Second tube 153: Third tube

[0090] 154: first annular plate portion 154a: oil hole

[0091] 155: second annular plate portion 155a: oil guide hole

[0092] 161: First sealing ring 162: Second sealing ring

[0093] 170: Groove seal 171: Groove wedge

[0094] 172: Sealant 180: Rotating shaft

[0095] 181: Axis chamber 191: First bearing

[0096] 192: Second bearing D: Axial DETAILED DESCRIPTION

[0097] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the embodiments of the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the embodiments of the present invention, some technical features well known in the art are not described.

[0098] In order to fully understand the embodiments of the present invention, a detailed structure will be presented in the following description. Obviously, the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art.

[0099] It should be understood that the purpose of the terms used herein is only to describe specific embodiments and is not intended to limit the present invention, and the singular forms "a", "an" and "said / the" are also intended to include plural forms, unless the context clearly indicates otherwise. When the terms "comprise" and / or "include" are used in this specification, it indicates the presence of the features, integral bodies, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integral bodies, steps, operations, elements, components and / or combinations thereof.

[0100] Ordinal numbers such as "first" and "second" used in the present invention are merely identifiers and do not have any other meaning, such as a specific order. Moreover, for example, the term "first component" itself does not imply the existence of a "second component", and the term "second component" itself does not imply the existence of a "first component". It should be noted that the terms "upper", "lower", "front", "back", "left", "right", "inner", "outer" and similar expressions used in the present invention are for illustrative purposes only and are not limiting.

[0101] The "parallel" / "perpendicular" and similar expressions used in the present invention include an absolute parallel / perpendicular relationship and a roughly parallel / perpendicular relationship (for example, a relationship that differs from absolute parallel / perpendicular by a range of -5° to +5°), which can have equivalent effects.

[0102] Hereinafter, specific embodiments of the present invention will be described in more detail with reference to the accompanying drawings. These drawings show representative embodiments of the present invention and do not limit the present invention.

[0103] In the related art, regarding the sealing of the stator assembly end of the motor, the end seal is fixed to the housing end cover and the stator assembly respectively by bolts and other fasteners, thereby forming a sealed cavity around the stator assembly of the motor, and the stator winding of the stator assembly is immersed in the sealed cavity with oil. Specifically, the bolts pass through the through holes of the housing end cover and are fixedly connected with the flange bolt mounting holes of the end sealing plate, thereby fixing the housing end cover to the end sealing plate; the bolts pass through the sealing pressure ring and the end sealing plate and are fixedly connected with the threaded holes of the stator teeth, thereby fixing the stator to the end sealing plate. This technology forms a sealed cavity for oil by combining the slot wedges, sealants and cooling pipes of the tooth slots. The oil enters the sealed cavity through the complex cooling channel on the top of the motor housing, exchanges heat with the stator winding in the sealed cavity, and conducts heat generated by the stator winding through the cooling channel on the top of the housing.

[0104] The related technology has at least the following disadvantages:

[0105] 1. Complex structure and low reliability. The related technology requires a complex fixing method to fix the end sealing plate to the stator teeth and the casing end cover respectively. The structure of the parts is complex, which increases the complexity of processing and assembly. Among them, the end sealing plate is fixed to the stator teeth by bolts. On the one hand, it is necessary to process threaded blind holes on the stator teeth, which reduces the strength and rigidity of the stator teeth. On the other hand, the threaded holes processed on the stator scale change the stator structure, which may increase the loss of the stator and affect the air gap magnetic field of the motor. Furthermore, if the bolts loosen and fall off, the risk of motor burning will increase.

[0106] 2. The cost is high and the design changes to the original motor are large. The number of additional parts in the motor is large, and the processing volume of each part is large, which will significantly increase the production cost of the motor. Taking the number of bolts as an example, a bolt needs to be fixed between two adjacent stator slots. The large number of bolts increases the overall production cost. In addition, if the relevant technology is adopted, it is necessary to make major changes to the original structural design of the motor, such as the need to process multiple through holes in the casing end cover and multiple threaded blind holes in the stator slots.

[0107] like Figures 1 to 6 As shown, in order to at least partially solve the above problems, the present invention provides a sealing cover, a motor, a drive assembly and a vehicle.

[0108] See also Figures 1 to 6 The present invention first provides a sealing cover (140, 150). The sealing cover (140, 150) according to the present invention may include a first barrel portion (141, 151), a second barrel portion (142, 152) and a first annular plate portion (144, 154). The second barrel portion (142, 152) is located inside the first barrel portion (141, 151), and the first annular plate portion (144, 154) is connected between the first barrel portion (141, 151) and the second barrel portion (142, 152). The first barrel portion (141, 151), the first annular plate portion (144, 154) and the second barrel portion (142, 152) are suitable for forming a stator end sealed cavity (100a, 100b) for accommodating a winding with the axial end of the stator core 121. The winding here can be understood as the stator winding 122. A mounting portion is provided on the second barrel portion (142, 152). The mounting portion is adapted to be connected to the housing 110 .

[0109] According to the sealing cover (140, 150) of the present invention, when applied to the motor 100, the first barrel (141, 151), the first annular plate (144, 154) and the second barrel (142, 152) are surrounded by the axial end of the stator core 121 to form a stator end sealing cavity (100a, 100b) for accommodating the winding, so that the stator core 121 can be sealed at the axial end of the stator core 121, thereby facilitating the immersion of more parts of the stator assembly 120 in the oil in the stator end sealing cavity (100a, 100b), thereby improving the heat dissipation effect of the stator assembly 120. By adopting this technical means, due to fewer parts, a relatively simple structure, and no need to change the structure of the stator core 121, the manufacturing difficulty and manufacturing cost are greatly reduced, so that it is not only suitable for mass production of new motor 100 products, but also suitable for upgrading and transforming some motor 100 products.

[0110] For example, an annular bearing seat (111d, 112f) is provided on the inner wall of the housing 110. The inner periphery of the bearing seat (111d, 112f) forms a bearing chamber (100e, 100f) for the bearing to be installed. The mounting portion is suitable for being supported on the outer periphery of the bearing seat (111d, 112f). Here, the connection between the sealing cover (140, 150) and the housing 110 can be achieved by supporting the outer periphery of the bearing seat (111d, 112f) with the mounting portion, so that the sealing cover (140, 150) and the stator assembly 120 do not need to be connected by changing the stator assembly 120, thereby achieving the purpose of reducing the number of parts, simplifying the product structure, and reducing the manufacturing difficulty and manufacturing cost. Figure 1 The inner periphery of the first bearing seat 111 d forms a first bearing chamber 100 e for the first bearing 191 , and the inner periphery of the second bearing seat 112 f forms a second bearing chamber 100 f for the second bearing 192 .

[0111] Optionally, the mounting portion is adapted to fit on the inner wall of the housing 110. In this way, the inner wall of the housing 110 can be used to more reliably limit the sealing cover (140, 150), and the structural compactness between the sealing cover (140, 150) and the housing 110 can be improved.

[0112] In addition, the sealing cover (140, 150) may further include a second annular plate portion (145, 155). The second annular plate portion (145, 155) is connected between the second barrel portion (142, 152) and the mounting portion. By providing the second annular plate portion (145, 155), a supporting function is played between the second barrel portion (142, 152) and the mounting portion. In some cases, it helps to reduce the material used in the mounting portion, thereby reducing costs. At the same time, it is also beneficial to arrange the mounting portion at a position closer to the center of the sealing cover (140, 150).

[0113] For example, the second annular plate portion 145 is suitable for being attached to the inner wall of the housing 110. Figure 1 The sealing cover on the left side, that is, the second annular plate portion 145 of the first sealing cover 140 is attached to the inner wall of the housing 110. The second annular plate portion 155 is suitable for being spaced apart from the inner wall of the housing 110. Figure 1 The sealing cover on the right side, i.e., the second annular plate portion 155 of the second sealing cover 150, is spaced apart from the inner wall of the housing 110. When the first sealing cover 140 and the second sealing cover 150 are applied to the motor, the axial structural compactness of the motor 100 can be improved by adopting the above-mentioned technical means, and the housing 110 can also be prevented from being deformed. If the first sealing cover 140 and the second sealing cover 150 are both axially fitted with the housing 110, the requirements for installation accuracy will be greatly increased, and there is a risk of deformation of the housing 110.

[0114] In other examples not shown, the second annular plate portion 145 and the second annular plate portion 155 are each adapted to be spaced apart from the inner wall of the housing 110 .

[0115] Optionally, the second barrel (142, 152) is coaxially arranged with the first barrel (141, 151). That is, the center line of the first barrel (141, 151) and the center line of the second barrel (142, 152) coincide. In other words, the second barrel (142, 152) and the first barrel (141, 151) are coaxially arranged. One end of the first barrel (141, 151) along its own axial direction is suitable for connecting to the housing 110. One end of the second barrel (142, 152) along its own axial direction is suitable for connecting to the axial end of the stator core 121.

[0116] In addition, the sealing cover (140, 150) may further include a third barrel portion (143, 153) and a second annular plate portion (145, 155). The third barrel portion (143, 153) is coaxially arranged with the second barrel portion (142, 152). The third barrel portion (143, 153) is located on the inner side of the second barrel portion (142, 152). The third barrel portion (143, 153) is suitable for being fixed to the outside of the bearing seat (111d, 112f) of the housing 110. The third barrel portion (143, 153) constitutes a mounting portion. The second annular plate portion (145, 155) is connected between the second barrel portion (142, 152) and the third barrel portion (143, 153) to serve as a supporting structure of the third barrel portion (143, 153) on the second barrel portion (142, 152). The second cylinder (142, 152), the second annular plate (145, 155) and the third cylinder (143, 153) are suitable for forming a rotor end sealing cavity (100c, 100d) with the axial end of the rotor core 131 in the application state. When oil flows in the rotor end sealing cavity (100c, 100d), the rotor assembly 130 can be cooled. At the same time, the oil can lubricate the movable parts such as the rotor assembly 130.

[0117] Optionally, the first annular plate portion (144, 154) is provided with an oil hole (144a, 154a). The oil hole (144a, 154a) is adapted to be connected to the oil collecting chamber 112b of the motor 100 and the stator end sealing chamber (100a, 100b). Figure 1 As shown, the motor 100 includes an oil inlet 112a and an oil collecting chamber 112b. The oil inlet 112a is located at the upper part of the motor 100. The oil collecting chamber 112b is located at the bottom of the motor 100. The stator end sealed chamber (100a, 100b) is connected to the oil collecting chamber 112b through the oil through hole (144a, 154a). The oil collecting chamber 112b is connected to the oil inlet 112a through external pipelines, pumps and other components. During use, the oil flows from the oil inlet 112a to the stator end sealed chamber (100a, 100b), then flows to the oil collecting chamber 112b, and finally flows from the oil collecting chamber 112b to the oil inlet 112a to enter the next cycle. By opening the oil holes (144a, 154a) in the first annular plate portion (144, 154), it is helpful to realize the circulation of oil between the oil collecting chamber 112b and the stator end sealing chamber (100a, 100b), so as to remove the heat of the stator assembly 120. The structures such as the oil holes (144a, 154a), the oil collecting chamber 112b of the motor 100, the stator end sealing chamber (100a, 100b) and the oil inlet 112a will be described in detail in the following content related to the motor 100.

[0118] Optionally, the sealing cover (140, 150) is provided with an oil guide hole (142a, 155a). The oil guide hole (142a, 155a) is located at the connection between the second annular plate portion (145, 155) and the second barrel portion (142, 152). It can be understood that the oil guide hole (142a, 155a) can be provided on the second annular plate portion (145, 155) or the second barrel portion (142, 152). The oil guide hole (142a, 155a) can be partially provided on the second annular plate portion (145, 155) and partially provided on the second barrel portion (142, 152). The oil guide hole (142a, 155a) is arranged at the intersection of the second annular plate portion (145, 155) and the second barrel portion (142, 152). When the sealing cover (140, 150) is installed on the motor 100, the oil guide hole (142a, 155a) is located at the lowest point of the connection between the second annular plate portion (145, 155) and the second cylinder portion (142, 152), and the oil guide hole (142a, 155a) is suitable for connecting to the oil collecting chamber and the rotor end sealing chamber (100c, 100d) of the motor 100 in the application state. By providing the oil guide hole (142a, 155a), the oil in the rotor end sealing chamber (100c, 100d) can be guided to the oil collecting chamber 112b, so that the oil circulates between the rotor end sealing chamber (100c, 100d) and the oil collecting chamber, thereby achieving heat dissipation of the rotor assembly 130. The oil guide holes (142a, 155a), the oil collecting chamber 112b of the motor 100, the rotor end sealing chamber (100c, 100d) and the oil inlet 112a and other structures here will be described in detail in the content related to the motor 100 below.

[0119] In some other examples, when the sealing cover (140, 150) is installed to the motor 100, the oil guide hole (142a, 155a) may not be arranged at the lowest point of the connection between the second annular plate portion (145, 155) and the second cylinder portion (142, 152), as long as the oil guide hole (142a, 155a) can guide the oil accumulated in the rotor end sealing cavity (100c, 100d) to the oil collecting cavity 112b.

[0120] Optionally, the sealing cover (140, 150) is provided with a wire hole. The wire hole is suitable for passing the lead wire of the stator winding 122. When the sealing cover is applied to the motor, usually only one sealing cover is required to be provided with a wire hole. For example, Figure 3 The first sealing cover 140 is shown to have a wire hole 144 b formed therein.

[0121] For example, one end of the first cylindrical portion (141, 151) along its own axial direction constitutes a sealing abutment portion (141a, 151a). The sealing abutment portion (141a, 151a) is suitable for abutting the sealing ring (161, 162). The sealing abutment portion (141a, 151a) is the first sealing abutment portion 141a and the second sealing abutment portion 151a which will be further described below. The sealing ring (161, 162) is the first sealing ring 161 and the second sealing ring 162 which will be further described below.

[0122] See also Figures 1 to 6 The present invention also provides a motor 100. The motor 100 may include a housing 110, a stator assembly 120 and the above-mentioned sealing cover (140, 150). The stator assembly is located inside the housing 110. The stator assembly 120 includes a stator core 121 and a stator winding 122. The stator core 121 is fixed to the housing 110. The sealing cover (140, 150) is arranged between the axial end of the stator core 121 and the housing 110. The first barrel portion (141, 151), the first annular plate portion (144, 154) and the second barrel portion (142, 152) are surrounded by the axial end of the stator core 121 to form a stator end sealed cavity (100a, 100b) for accommodating the stator winding 122. The mounting portion is connected to the housing 110.

[0123] According to the motor 100 of the present invention, by applying the above-mentioned sealing cover (140, 150), the first barrel (141, 151), the first annular plate (144, 154) and the second barrel (142, 152) are surrounded by the axial end of the stator core 121 to form a stator end sealing cavity (100a, 100b) for accommodating the winding, so that the stator core 121 can be sealed at the axial end of the stator core 121, thereby facilitating the immersion of more parts of the stator assembly 120 in the oil and improving the heat dissipation effect of the stator assembly 120. By adopting this technical means, due to fewer parts, a simpler structure, and no need to change the structure of the stator core 121, the manufacturing difficulty and manufacturing cost are greatly reduced, so that it is not only suitable for mass production of new motor 100 products, but also suitable for upgrading and transforming some motor 100 products.

[0124] Further, the stator core 121 includes a stator slot 121c. The motor of the present invention may include a slot seal 170 and two sealing covers arranged oppositely. The slot seal 170 is suitable for sealingly connecting to the notch of the stator slot 121c of the stator assembly 120 to seal the inner periphery of the stator assembly 120. The two sealing covers are respectively recorded as a first sealing cover 140 and a second sealing cover 150. The first sealing cover 140 and the second sealing cover 150 are suitable for being arranged at both ends of the stator assembly 120 along its own axial direction D. The first sealing cover 140 and the second sealing cover 150 are each corresponding to the part of the second barrel portion and are sealed and connected to the axial end of the stator core 121 at the slot seal 170 along the axial direction D of the stator assembly 120. In other words, one end of the second barrel portion 142 of the first sealing cover 140 along its own axial direction is sealed and connected to one axial end of the stator core 121. One end of the second barrel portion 152 of the second sealing cover 150 along its own axial direction is sealed and connected to the other axial end of the stator core 121.

[0125] The sealing cover is constructed such that:

[0126] In the state of being installed to the motor 100, a portion of at least one of the first sealing cover 140 and the second sealing cover 150 is spaced apart from the stator assembly 120 along the axial direction D of the stator assembly 120, so as to enclose with the stator assembly 120 to form a stator end sealing cavity (100a, 100b) suitable for accommodating oil. The axial direction of the stator assembly 120, the axial direction of the first sealing cover 140, the axial direction of the second sealing cover 150, and the axial direction of the rotating shaft 180 to be mentioned below are consistent. The stator assembly 120, the first sealing cover 140, the second sealing cover 150 and the rotating shaft 180 are coaxially arranged.

[0127] According to the sealing cover of the present invention, when applied to the motor 100, the slot seal 170 can seal the slot of the stator slot 121c, and the first sealing cover 140 and the second sealing cover 150 can seal the ends of the stator assembly 120 at both ends of the stator assembly 120 along its own axial direction D, so that a stator end sealing cavity suitable for accommodating oil can be enclosed between the sealing cover and the end of the stator assembly 120 along the axial direction D, thereby helping to immerse more parts of the stator assembly 120 in the oil and improve the effect of heat dissipation of the stator assembly 120. By adopting this technical means, due to fewer parts, a simpler structure, and no need to change the structure of the stator assembly 120, the manufacturing difficulty and manufacturing cost are greatly reduced, so that it is not only suitable for mass production of new motor 100 products, but also suitable for upgrading and transforming some motor 100 products.

[0128] The structure of the first sealing cover 140 and the structure of the second sealing cover 150 according to the present invention may be the same or different. The following will describe in detail some specific embodiments of the present invention.

[0129] See also Figure 1 , Figure 3 as well as Figure 4 For example, the first sealing cover 140 may include a first barrel 141, a second barrel 142, a third barrel 143, a first annular plate 144, and a second annular plate 145. The first barrel 141, the second barrel 142, the third barrel 143, the first annular plate 144, and the second annular plate 145 here correspond to the first barrel, the second barrel, the third barrel, the first annular plate, and the second annular plate of the sealing cover in the above content. One end of the first barrel 141 along its own axial direction D is suitable for being connected to the end cover 111 of the housing 110. The other end of the first barrel 141 along its own axial direction D is suitable for facing the stator assembly 120. The second barrel 142 is coaxially arranged with the first barrel 141. The second barrel 142 is located on the inner side of the first barrel 141. One end of the second barrel portion 142 along its own axial direction D is suitable for being sealed and connected to the end surface of the stator assembly 120 along the axial direction D of the stator assembly 120 at the groove seal 170. The third barrel portion 143 is coaxially arranged with the second barrel portion 142. The third barrel portion 143 is located on the inner side of the second barrel portion 142. The third barrel portion 143 is suitable for being fixedly sleeved on the outside of the first bearing seat 111d of the end cover 111. The inner periphery of the first bearing seat 111d is provided with a first bearing chamber 100e for mounting the first bearing 191. The first annular plate portion 144 is located between the first barrel portion 141 and the second barrel portion 142. And the first annular plate portion 144 is connected to the first barrel portion 141 and the second barrel portion 142. The second annular plate portion 145 is located between the second barrel portion 142 and the third barrel portion 143. And the second annular plate portion 145 is connected to the second barrel portion 142 and the third barrel portion 143. When the first sealing cover 140 is applied to the motor 100, the first stator end sealing chamber 100a is formed between the first barrel 141, the first annular plate 144, the second barrel 142 and the stator. The first stator end sealing chamber 100a here corresponds to the stator end sealing chamber in the above content. The end of the stator can be immersed in the oil of the first stator end sealing chamber 100a. The first rotor end sealing chamber 100c is formed between the second barrel 142, the second annular plate 145, the third barrel 143 and the rotor.

[0130] The first barrel portion 141 , the second barrel portion 142 , the third barrel portion 143 , the first annular plate portion 144 and the second annular plate portion 145 may be manufactured as an integrated component, which facilitates improving the processing efficiency.

[0131] Continue reading Figure 1 , Figure 3 as well as Figure 4In addition, the motor 100 may further include a first sealing ring 161. The first sealing ring 161 is coaxially arranged with the first sealing cover 140. The first sealing ring 161 is connected to the end surface of the first sealing cover 140 along its own axial direction D at the outer peripheral portion of the first sealing cover 140. The first sealing ring 161 is suitable for sealingly connecting to the end cover 111. By providing the first sealing ring 161, when the sealing cover is applied to the motor 100, sealing between the outer peripheral portion of the first sealing cover 140 and the end cover 111 can be achieved.

[0132] For example, the first sealing ring 161 is connected to the end of the first cylinder portion 141 in the axial direction D of the first sealing cover 140 .

[0133] See also Figure 1 and Figure 3 For example, the first annular plate portion 144 is provided with an oil hole 144a. The oil hole 144a is connected to the oil collecting chamber 112b of the motor 100 and the first stator end sealing chamber 100a. In this way, the oil in the first stator end sealing chamber 100a can circulate to the oil collecting chamber 112b through the oil hole 144a to take away the heat of the stator, thereby achieving the purpose of heat dissipation of the stator. The oil hole 144a here corresponds to the oil hole of the sealing cover in the above content.

[0134] See also Figure 3 Optionally, the first annular plate portion 144 may include a plurality of oil holes 144a. The oil holes 144a are arranged at intervals along the circumferential direction of the first annular plate portion 144. The two ends of the first cylinder portion 141 each protrude from the surface of the first annular plate portion 144 along the axial direction D of the first cylinder portion 141. By arranging a plurality of oil holes 144a at intervals in the circumferential direction of the first annular plate portion 144, the efficiency of the oil circulation outflow in the sealing cavity 100a of the first stator end can be improved. By extending the two ends of the first cylinder portion 141, on the one hand, it is convenient to position and connect the first sealing ring 161, and on the other hand, it helps to extend a part of the first cylinder portion 141 into the interior of the housing 112, so as to facilitate the positioning between the first sealing cover 140 and the housing 112.

[0135] See also Figure 1 and Figure 4For example, the first sealing cover 140 is provided with an oil guide hole 142a. The oil guide hole 142a is located at the connection between the second annular plate portion 145 and the second barrel portion 142. When the sealing cover is installed to the motor 100, the oil guide hole 142a is located at a lower position of at least one of the second annular plate portion 145 and the second barrel portion 142, so that the oil can be discharged more smoothly by utilizing the dead weight of the oil. The oil guide hole 142a is suitable for connecting to the oil collecting chamber 112b and the first rotor end sealing chamber 100c of the motor 100. By providing the oil guide hole 142a, the oil in the first rotor end sealing chamber 100c can circulate to the oil collecting chamber 112b, thereby taking away the heat of the rotor and achieving the purpose of heat dissipation of the rotor. The oil guide hole 142a here corresponds to the oil guide hole of the sealing cover in the above content.

[0136] See also Figure 1 , Figure 3 as well as Figure 4 For example, both ends of the second barrel portion 142 protrude from the surface of the first annular plate portion 144 along the axial direction D of the second barrel portion 142. The second annular plate portion 145 is not on the same plane as the first annular plate portion 144. When the sealing cover is installed to the motor 100, the second annular plate portion 145 is farther from the stator assembly 120 in the axial direction D of the stator assembly 120 than the first annular plate portion 144. This makes it easy to arrange the second annular plate portion 145 close to the end cover 111 to improve the sealing performance between the second annular plate portion 145 and the end cover 111. At the same time, it is also beneficial to increase the sealing cavity 100a at the end of the first stator.

[0137] Further, one end of the third barrel portion 143 is coplanar with the second annular plate portion 145. This facilitates the arrangement of one end of the third barrel portion 143 and the second annular plate portion 145 close to the end cover 111. The other end of the third barrel portion 143 protrudes from the surface of the second annular plate portion 145 that is suitable for facing the stator assembly 120 along the axial direction D of the third barrel portion 143. This can increase the contact area between the third barrel portion 143 and the first bearing seat 111d, thereby improving the stability of the connection structure between the first sealing cover 140 and the end cover 111.

[0138] Optionally, the dimension of the third cylindrical portion 143 along its radial direction is greater than the dimension of the second annular plate portion 145 along its axial direction D. In this way, the structural strength of the third cylindrical portion 143 itself can be increased.

[0139] Optionally, the dimension of the third barrel portion 143 along its own axial direction D is greater than the dimension of the second annular plate portion 145 along its own axial direction D. This can increase the structural strength of the third barrel portion 143 itself, and also increase the contact area between the third barrel portion 143 and the first bearing seat 111d, thereby improving the stability of the connection structure between the first sealing cover 140 and the end cover 111.

[0140] See also Figure 1 , Figure 5 as well as Figure 6 For example, the second sealing cover 150 may include a first barrel 151, a second barrel 152, a third barrel 153, a first annular plate 154 and a second annular plate 155. The first barrel 151, the second barrel 152, the third barrel 153, the first annular plate 154 and the second annular plate 155 here correspond to the first barrel, the second barrel, the third barrel, the first annular plate and the second annular plate of the sealing cover in the above content. One end of the first barrel 151 along its own axial direction D is suitable for being connected to the housing 112 of the casing 110. The other end of the first barrel 151 along its own axial direction D is suitable for facing the stator assembly 120. The second barrel 152 is coaxially arranged with the first barrel 151. The second barrel 152 is located on the inner side of the first barrel 151. One end of the second barrel 152 along its own axial direction D is suitable for being sealed and connected to the end surface of the stator assembly 120 along the axial direction D of the stator assembly 120 at the groove seal 170. The third barrel 153 is coaxially arranged with the second barrel 152. The third barrel 153 is located on the inner side of the second barrel 152. The third barrel 153 is suitable for being fixedly sleeved on the outside of the second bearing seat 112f of the housing 112. The inner periphery of the second bearing seat 112f is provided with a second bearing chamber 100f for mounting the second bearing 192. The first annular plate portion 154 is located between the first barrel 151 and the second barrel 152. And the first annular plate portion 154 is connected to the first barrel 151 and the second barrel 152. The second annular plate portion 155 is located between the second barrel 152 and the third barrel 153. And the second annular plate portion 155 is connected to the second barrel 152 and the third barrel 153. When the second sealing cover 150 is applied to the motor 100, the first cylinder 151, the first annular plate 154, the second cylinder 152 and the stator are surrounded to form a second stator end sealed cavity 100b. The end of the stator can be immersed in the oil of the second stator end sealed cavity 100b to achieve heat exchange. The second cylinder 152, the second annular plate 155, the third cylinder 153 and the rotor are surrounded to form a second rotor end sealed cavity 100d.

[0141] The first barrel portion 151 , the second barrel portion 152 , the third barrel portion 153 , the first annular plate portion 154 and the second annular plate portion 155 may be manufactured as an integrated component, which facilitates improving the processing efficiency.

[0142] Continue reading Figure 1 , Figure 5 as well as Figure 6In addition, the motor 100 may further include a second sealing ring 162. The second sealing ring 162 is coaxially arranged with the second sealing cover 150. The second sealing ring 162 is connected to the end surface of the second sealing cover 150 along its own axial direction D at the outer peripheral portion of the second sealing cover 150. The second sealing ring 162 is suitable for sealingly connecting to the housing 112 of the motor 100. By providing the second sealing ring 162, when the sealing cover is applied to the motor 100, sealing between the outer peripheral portion of the second sealing cover 150 and the housing 112 can be achieved.

[0143] For example, the second sealing ring 162 may be connected to the end of the first cylinder portion 141 in the axial direction D of the second sealing cover 150 .

[0144] See also Figure 1 and Figure 5 For example, the first annular plate portion 154 is provided with an oil hole 154a. The oil hole 154a is adapted to be connected to the oil collecting chamber 112b and the second stator end sealing chamber 100b of the motor 100. In this way, the oil in the second stator end sealing chamber 100b can be circulated to the oil collecting chamber 112b through the oil hole 154a to take away the heat of the stator, thereby achieving the purpose of heat dissipation of the stator. The oil hole 154a here is equivalent to the oil hole of the sealing cover in the above content.

[0145] See also Figure 5 Optionally, the first annular plate portion 154 may include a plurality of oil holes 154a. The oil holes 154a are arranged at intervals along the circumferential direction of the first annular plate portion 154. The two ends of the first cylinder portion 151 protrude from the surface of the first annular plate portion 154 along the axial direction D of the first cylinder portion 151. By arranging a plurality of oil holes 154a at intervals in the circumferential direction of the first annular plate portion 154, the efficiency of the oil circulation outflow in the second stator end sealing cavity 100b can be improved. By extending the two ends of the first cylinder portion 151, it is convenient to position and connect the second sealing ring 162 on the one hand, and to position the first sealing cover 140 and the housing 112 on the other hand.

[0146] See also Figure 1 and Figure 6For example, the second sealing cover 150 is provided with an oil guide hole 155a. The oil guide hole 155a is located at the connection between the second annular plate portion 155 and the second barrel portion 152. When the sealing cover is installed to the motor 100, the oil guide hole 155a is located at a lower position of at least one of the second annular plate portion 155 and the second barrel portion 152, so that the oil can be discharged more smoothly by utilizing the dead weight of the oil. The oil guide hole 155a is suitable for connecting to the oil collecting chamber 112b and the second rotor end sealing chamber 100d of the motor 100. By providing the oil guide hole 155a, the oil in the second rotor end sealing chamber 100d can circulate to the oil collecting chamber 112b, thereby taking away the heat of the rotor and achieving the purpose of heat dissipation of the rotor. The oil guide hole 155a here is equivalent to the oil through hole of the sealing cover in the above content.

[0147] exist Figure 1 and Figure 6 In the illustrated example, the oil guide hole 155 a is located in the second annular plate portion 155 .

[0148] For example, one end of the second barrel portion 152 protrudes from the surface of the first annular plate portion 154 that is adapted to face the stator assembly 120 along the axial direction D of the second barrel portion 152. This allows the end of the second barrel portion 152 to abut against the portion of the stator equipped with the groove seal 170. The other end of the second barrel portion 152, the first annular plate portion 154, and the second annular plate portion 155 are coplanar. This simplifies the structure of the second sealing cover 150.

[0149] Continue reading Figure 1 and Figure 6 For example, both ends of the third barrel portion 153 protrude from the surface of the second annular plate portion 155 along the axial direction D of the third barrel portion 153. This can increase the contact area between the third barrel portion 153 and the second bearing seat 112f, thereby improving the stability of the connection structure between the second sealing cover 150 and the housing 112. In some examples, this can also prevent the first annular plate portion 154 and the second annular plate portion 155 from contacting the inner surface of the housing 112, so as to enclose and form a second oil drain chamber 100i between the second sealing cover 150 and the housing 112.

[0150] Optionally, the dimension of the third cylindrical portion 153 along its radial direction is greater than the dimension of the second annular plate portion 155 along its axial direction D. In this way, the structural strength of the third cylindrical portion 153 can be increased.

[0151] Optionally, the dimension of the third barrel portion 153 along its own axial direction D is greater than the dimension of the second annular plate portion 155 along its own axial direction D. This can increase the structural strength of the third barrel portion 153 itself, and also increase the contact area between the third barrel portion 153 and the second bearing seat 112f, thereby improving the stability of the connection structure between the second sealing cover 150 and the housing 112.

[0152] See also Figure 3 Optionally, one of the first sealing cover 140 and the second sealing cover 150 is provided with a wire hole 144b. The wire hole 144b is suitable for passing the lead wire of the stator winding 122. It can be understood here that the structures of the first sealing cover 140 and the second sealing cover 150 are different.

[0153] exist Figure 3 In the example shown, the wire hole 144 b is provided in the first sealing cover 140 .

[0154] Continue reading Figure 3 Furthermore, the inner circumference of the first sealing cover 140, i.e., the inner circumference of the third barrel 143, is provided with a first guide positioning portion 143a. The outer circumference of the first bearing seat 111d of the end cover 111 is provided with a second guide positioning portion (not shown). The first guide positioning portion 143a and the second guide positioning portion are guided and matched with each other along the axial direction D of the rotating shaft 180. And the first guide positioning portion 143a and the second guide positioning portion are limited and matched with each other along the circumferential direction of the rotating shaft 180. The third barrel 143 and the first bearing seat 111d can be interference fit. By adopting this technical means, it is more convenient to position and assemble the first sealing cover 140 provided with the wire hole 144b on the end cover 111, which is conducive to ensuring that the lead wire of the stator winding 122 can be accurately connected with the wire hole 144b.

[0155] exist Figure 3 In the example shown, the first guide positioning portion 143a is a guide positioning groove. Correspondingly, the second guide positioning portion can be a guide positioning boss.

[0156] See also Figure 1 and Figure 2 For example, the slot seal 170 may include a slot wedge 171 and a sealant 172. The slot wedge 171 is installed at the slot opening of the stator slot 121c of the stator core 121. After the stator winding 122 is installed in the stator slot 121c, the sealant 172 may be injected between the slot wedge 171 and the stator winding 122, so as to achieve sealing of the inner periphery of the stator core 121.

[0157] See also Figures 1 to 6The present invention also provides a motor 100. The motor 100 may include a housing 110, a stator assembly 120, and a sealing cover according to the above. The stator assembly 120 is located in the inner cavity surrounded by the housing 110 and is fixed to the housing 110. The stator assembly 120 may include a stator slot 121c. The sealing cover may include a plurality of slot seals 170. Each slot seal 170 is sealed and connected to the notch of each stator slot 121c of the stator assembly 120 in a one-to-one correspondence to seal the inner periphery of the stator assembly 120. The sealing cover may also include a first sealing cover 140 and a second sealing cover 150 that are arranged opposite to each other. The first sealing cover 140 and the second sealing cover 150 are suitable for being arranged on both sides of the stator assembly 120 along its own axial direction D. The first sealing cover 140 and the second sealing cover 150 are each annular structures. The outer periphery of the annular structure is suitable for being sealed and connected to the housing 110. The inner periphery of the annular structure is suitable for being connected to the housing 110. The portion between the outer and inner circumferences of the annular structure is adapted to be sealingly connected to the end surface of the stator assembly 120 in the axial direction D of the stator assembly 120 at the groove seal 170 .

[0158] According to the motor 100 of the present invention, by applying the above-mentioned sealing cover and other components, the ends and inner periphery of the stator assembly 120 can be sealed at both ends of the stator assembly 120 along its own axial direction D, and a stator end sealing cavity suitable for accommodating oil can be enclosed between the sealing cover and the end of the stator assembly 120 along the axial direction D, thereby helping to immerse more parts of the stator assembly 120 in the oil and improve the effect of heat dissipation of the stator assembly 120. By adopting this technical means, the sealing structure is simplified, and there is no need to change the structure of the stator assembly 120, which greatly reduces the manufacturing difficulty and manufacturing cost, so that it is not only suitable for mass production of new motor 100 products, but also suitable for upgrading and transforming some motor 100 products produced in the past.

[0159] Continue reading Figures 1 to 6For example, the housing 110 may include an oil inlet 112a and an oil collecting chamber 112b. The oil inlet 112a is located at the top of the housing 110. The oil collecting chamber 112b is located at the bottom of the housing 110. The stator assembly 120 includes a stator core 121 and a stator bracket. The stator core 121 is fixed to the rotating shaft 180 through the stator bracket. The yoke of the stator core 121 may include a yoke axial D flow channel 121a. The yoke axial D flow channel 121a is configured to penetrate the stator assembly 120 along the axial direction D of the stator assembly 120. The yoke axial D flow channel 121a is connected to the oil inlet 112a. A first stator end sealing chamber 100a is formed between the first sealing cover 140 and the stator assembly 120. The first stator end sealing chamber 100a is connected to the yoke axial D flow channel 121a. A first oil drain chamber 100h is formed between the first sealing cover 140 and the housing 110. The first oil drain chamber 100h is connected to the oil collecting chamber 112b. The first sealing cover 140 is provided with an oil through hole 144a. The oil through hole 144a is connected to the first oil drain chamber 100h. A second stator end sealing chamber 100b is formed between the second sealing cover 150 and the stator assembly 120. The second stator end sealing chamber 100b is connected to the axial D flow channel 121a of the yoke. A second oil drain chamber 100i is formed between the second sealing cover 150 and the housing 110. The second oil drain chamber 100i is connected to the oil collecting chamber 112b. The second sealing cover 150 is provided with an oil through hole 154a. The oil through hole 154a is connected to the second oil drain chamber 100i. The oil enters the housing 110 from the oil inlet 112a, and then flows into the first stator end sealed cavity 100a and the second stator end sealed cavity 100b through the yoke axial D flow channel 121a to immerse the ends of the stators. Then, the oil in the first stator end sealed cavity 100a flows from the oil through hole 144a and the first row oil cavity 100h to the oil collecting cavity 112b. The oil in the second stator end sealed cavity 100b flows from the oil through hole 154a and the second row oil cavity 100i to the oil collecting cavity 112b.

[0160] See also Figure 1 and Figure 2 Optionally, the yoke of the stator core 121 may include a plurality of yoke axial D flow channels 121a. The yoke axial D flow channels 121a are spaced apart along the circumferential direction of the stator assembly 120. A yoke circumferential flow channel 121b is formed between the outer circumferential surface of the stator assembly 120 and the housing 110. The yoke circumferential flow channel 121b is connected to the oil inlet 112a. The yoke circumferential flow channel 121b is extended along the circumferential direction of the stator assembly 120 to be connected to each yoke axial D flow channel 121a. By providing the yoke circumferential flow channel 121b, the time difference in receiving the oil by each yoke axial D flow channel 121a is made smaller, thereby improving the cooling efficiency of the yoke and the cooling efficiency of the stator end.

[0161] exist Figure 1In the example shown, an annular yoke annular groove is formed on the outer circumference of the stator core 121. The outer circumference of the stator core 121 is interference fit with the housing 110. The housing 110 closes the notch of the yoke annular groove, thereby forming a yoke circumferential flow channel 121b between the stator core 121 and the housing 110.

[0162] See also Figure 1 , Figures 3 to 6For example, the housing 110 may include a first bearing seat 111d and a second bearing seat 112f. The first bearing seat 111d and the second bearing seat 112f are arranged at intervals along the axial direction D of the stator assembly 120. The housing 110 may also include an oil inlet 112a, an oil collecting chamber 112b, a first housing flow channel 111a, and a second housing flow channel 112c. The oil inlet 112a is located at the top of the housing 110. The oil collecting chamber 112b is located at the bottom of the housing 110. The first housing flow channel 111a and the second housing flow channel 112c are both connected to the oil inlet 112a. The motor 100 may include a rotating shaft 180 and a rotor assembly 130. The rotating shaft 180 is rotatably connected to the inner cavity of the housing 110. The rotating shaft 180 is coaxially arranged with the stator assembly 120. The rotating shaft 180 and the first bearing seat 111d are surrounded to form a first bearing chamber 100e. The first bearing chamber 100e is equipped with a first bearing 191. The rotating shaft 180 and the second bearing seat 112f are arranged to form a second bearing chamber 100f. A second bearing 192 is installed in the second bearing chamber 100f. The rotor assembly 130 is fixed to the rotating shaft 180. The rotor assembly 130 and the first sealing cover 140 are arranged to form a first rotor end sealing chamber 100c. The first rotor end sealing chamber 100c is connected to the first housing flow channel 111a via the first bearing chamber 100e. The rotor assembly 130 and the second sealing cover 150 are arranged to form a second rotor end sealing chamber 100d. The second rotor end sealing chamber 100d is connected to the second housing flow channel 112c via the second bearing chamber 100f. A first oil discharge chamber 100h is arranged between the first sealing cover 140 and the housing 110. The first oil discharge chamber 100h is connected to the oil collecting chamber 112b. The first sealing cover 140 is provided with an oil guide hole 142a. The oil guide hole 142a is located at the lower part of the first rotor end sealed cavity 100c. The oil guide hole 142a is connected to the first rotor end sealed cavity 100c and the first oil discharge cavity 100h. After the oil enters the housing 110 from the oil inlet 112a, it flows to the first bearing chamber 100e through the first housing flow channel 111a, and then flows to the first rotor end sealed cavity 100c. The oil can cool the first bearing 191 and the rotor assembly 130. The oil in the first rotor end sealed cavity 100c flows to the first oil discharge cavity 100h through the oil guide hole 142a, and finally flows to the oil collecting cavity 112b through the first oil discharge cavity 100h. At the same time, the oil can also flow from the oil inlet 112a to the second bearing chamber 100f through the second housing flow channel 112c, and then flows to the second rotor end sealed cavity 100d. The oil can cool the second bearing 192 and the rotor assembly 130. The cooling oil in the second rotor end sealing cavity 100d flows to the second oil discharge cavity 100i through the oil guide hole 155a, and then flows to the oil collecting cavity 112b through the second oil discharge cavity 100i. Thus, the rotor assembly 130, the first bearing 191 and the second bearing 192 can be cooled.

[0163] See also Figure 1 Optionally, the inner rings of the first bearing 191 and the second bearing 192 are fixedly connected to the rotating shaft 180. The outer ring of the first bearing 191 is fixedly connected to the first bearing seat 111d. The outer ring of the second bearing 192 is fixedly connected to the second bearing seat 112f.

[0164] Continue reading Figure 1 For example, the rotor assembly 130 may include a rotor core 131, a rotor bracket 132, and a permanent magnet (not shown). The rotor core 131 is fixedly mounted on the rotating shaft 180 through the rotor bracket 132. The rotor core 131 has a magnet accommodating cavity 131a. The magnet accommodating cavity 131a is suitable for accommodating a permanent magnet. Inside the housing 112, a stator core 121 is interference-fitted, and a stator winding 122 is inserted into the stator core 121. The stator winding 122 interacts with the permanent magnet in the magnet accommodating cavity 131a to generate an air gap magnetic field, thereby driving the motor 100 to move.

[0165] exist Figure 1 In the example shown, the end cover 111 may include a first connecting flow channel 111f that is connected to the first radial flow channel 111c and the first bearing chamber 100e. The housing 112 may include a second connecting flow channel 112h that is connected to the second radial flow channel 112e and the second bearing chamber 100f.

[0166] See also Figure 1 , further, a first opening 111g is provided on the side of the first bearing chamber 100e facing the rotor assembly 130. The first opening 111g is annular and arranged coaxially with the first bearing chamber 100e. The radial dimension of the first opening 111g increases along the axial direction D of the rotating shaft 180 and in the direction close to the rotor assembly 130. The first bearing chamber 100e is connected to the first rotor end sealing chamber 100c through the first opening 111g. This facilitates the oil in the first bearing chamber 100e to flow to the first rotor end sealing chamber 100c. A second opening 112i is provided on the side of the second bearing chamber 100f facing the rotor assembly 130. The second opening 112i is annular and arranged coaxially with the second bearing chamber 100f. The radial dimension of the second opening 112i increases along the axial direction D of the rotating shaft 180 and in the direction close to the rotor assembly 130. The second bearing chamber 100f is connected to the second rotor end sealing chamber 100d through the second opening 112i. This facilitates the oil in the second bearing chamber 100f to flow to the second rotor end sealing chamber 100d.

[0167] See also Figure 1For example, the housing 110 may include an end cover 111 and a housing 112. The end cover 111 is sealed and connected to the housing 112. The end cover 111 is connected to the first sealing cover 140. The housing 112 is connected to the second sealing cover 150. The end cover 111 may include a first housing flow channel 111a. One end of the rotating shaft 180 corresponding to the first sealing cover 140 is spaced apart from the end cover 111 along its own axial direction D to form a first shaft end chamber 100g. The first shaft end chamber 100g is connected to the first rotor end sealing chamber 100c via the first bearing chamber 100e. The first shaft end chamber 100g is connected to the first housing flow channel 111a. The rotating shaft 180 may include an axial center chamber 181. The axial center chamber 181 is connected to the first shaft end chamber 100g.

[0168] Specifically, the end cover 111 and the rotating shaft 180 are spaced apart in the axial direction D of the rotating shaft 180 to form a first shaft end chamber 100g. The first shaft end chamber 100g is connected to the first bearing chamber 100e. In this way, the end of the rotating shaft 180 can be cooled by oil.

[0169] Furthermore, a shaft center chamber 181 is formed inside the rotating shaft 180 . The shaft center chamber 181 is connected to the first shaft end chamber 100 g . This can increase the contact area between the rotating shaft 180 and the oil, thereby improving the heat dissipation effect of the rotating shaft 180 .

[0170] See also Figure 1 For example, one end of the rotating shaft 180 passes through the housing 112 and extends to the outside of the housing 112. The housing 112 and a portion of the rotating shaft 180 are spaced apart in the axial direction D of the rotating shaft 180 to form a second shaft end chamber 100j. The second shaft end chamber 100j is connected to the second bearing chamber 100f. In this way, the other end of the rotating shaft 180 can be cooled by oil.

[0171] See also Figure 1 , Figures 3 to 6 For example, the first sealing cover 140 may include a first sealing abutment 141a continuously arranged along its own circumferential direction. The first sealing abutment 141a can be understood as an end portion of the above-mentioned first barrel portion 141 along the axial direction D. The second sealing cover 150 is connected to the housing 112. The second sealing cover 150 may include a second sealing abutment 151a continuously arranged along its own circumferential direction. The second sealing abutment 151a can be understood as an end portion of the above-mentioned first barrel portion 151 along the axial direction D. The sealing cover may include a first sealing ring 161 and a second sealing ring 162. The first sealing ring 161 is sealingly connected to the first sealing abutment 141a and the end cover 111. The second sealing ring 162 is sealingly connected to the second sealing abutment 151a and the housing 112.

[0172] See also Figure 1 , Figure 3as well as Figure 4 Optionally, the end cover 111 may include a first sealing groove 111e. The first sealing groove 111e is adapted to accommodate the first sealing ring 161. The first barrel portion 141 of the first sealing cover 140 is arranged corresponding to the first sealing groove 111e along the axial direction D of the stator assembly 120. In other words, in a plane perpendicular to the axial direction D of the stator assembly 120, the orthographic projection of the first sealing groove 111e at least partially overlaps with the orthographic projection of the first barrel portion 141 of the first sealing cover 140. The first sealing cover 140 pushes the first sealing ring 161 into the first sealing groove 111e.

[0173] See also Figure 1 , Figure 5 as well as Figure 6 Optionally, the housing 112 may include a second sealing groove 112g. The second sealing groove 112g is adapted to accommodate the second sealing ring 162. The second barrel portion 142 of the second sealing cover 150 is arranged corresponding to the second sealing groove 112g along the axial direction D of the stator assembly 120. In other words, in a plane perpendicular to the axial direction D of the stator assembly 120, the orthographic projection of the second sealing groove 112g at least partially overlaps with the orthographic projection of the second barrel portion 142 of the second sealing cover 150. The second sealing cover 150 pushes the second sealing ring 162 into the second sealing groove 112g.

[0174] The motor 100 mentioned above may be an oil-cooled motor 100, which can cool the motor 100 on one hand and lubricate the rotating parts on the other hand.

[0175] The motor 100 proposed in the present invention can have 72 slots. In addition to the stator winding 122, a slot wedge 171 is inserted into each slot of the stator core 121. After the slot wedge 171 is inserted, the sealant 172 can be injected between the stator winding 122 and the slot wedge 171. The two end faces of the stator core 121 are respectively bonded to the end faces of the first sealing cover 140 and the second sealing cover 150. Among them, the stator core 121 and the first sealing cover 140 are bonded at the slot wedge 171 and the sealant 172. The stator core 121 and the second sealing cover 150 are bonded at the slot wedge 171 and the sealant 172.

[0176] The motor 100 of the present invention fixes the sealing cover by interference fit between the housing 110 and the sealing cover, and seals the cooling oil at the end of the stator assembly 120 by using the sealing ring of the sealing cover and the housing 110, so that the end of the stator assembly 120 can be immersed in the cooling oil. The present invention has a simple structure, is easy to assemble, has a low cost, and has high reliability, avoids the structural performance of the stator teeth being reduced due to the threaded holes, and is conducive to realizing mass production of the proposed solution.

[0177] The first sealing ring 161 and the second sealing ring 162 of the present invention can be not only O-type sealing rings, but also other sealing forms such as F-type sealing rings. The number of stator slots 121c of the stator core 121 of the present invention can be not only 72 slots, but also 36 slots, 48 ​​slots, 54 slots, etc. The sealing cover of the present invention can be used not only for electric motors, but also for generators 100.

[0178] According to the motor 100 of the present invention, the cooling oil enters the choke of the stator core 121 through the top of the motor housing 110, and the stator winding 122 is completely immersed in the chamber enclosed by the proposed sealing cover and the stator assembly 120. The sealing cover may include two parts: the stator slot 121c seal and the stator end seal, wherein the stator end seal is sealed by the sealing cover and the sealing ring. The stator slot 121c seal is sealed by the slot wedge 171 and the sealant 172. The sealing cover has the advantages of simple structure, low cost, easy assembly and high reliability, and can effectively improve the cooling effect of the cooling system of the motor 100.

[0179] See also Figures 1 to 6 , the working principle of the present invention can be:

[0180] The cooling oil of the motor 100 of the present invention is pumped out from the oil collecting chamber 112b by the oil pump and enters the motor 100 from the oil inlet 112a through the oil cooler and the filter. After the cooling oil enters the motor 100 through the oil inlet 112a, the motor 100 is cooled in three ways.

[0181] The first oil circuit is the axial D flow channel of the choke part where the cooling oil enters the stator core 121 after passing through the oil inlet 112a. After the cooling oil flows into the axial D flow channel of the choke part, it enters the first stator end sealed cavity 100a formed by the first sealing cover 140 and the stator assembly 120, and immerses the stator winding 122 with the highest heat generation in the motor 100. At the same time, after the cooling oil flows into the axial D flow channel of the choke part, it enters the second stator end sealed cavity 100b formed by the second sealing cover 150 and the stator assembly 120, and immerses the stator winding 122 with the highest heat generation in the motor 100. The cooling oil immerses the stator winding 122 in the above-mentioned first stator end sealed cavity 100a and the second stator end sealed cavity 100b. When the stator winding 122 generates heat during the operation of the motor 100, the cooling oil takes away the heat generated by the stator winding 122 through heat exchange. When the first stator end sealed cavity 100a of the present invention is filled with cooling oil, the cooling oil will be discharged from the oil through hole 144a of the first sealing cover 140 and finally flow into the oil collecting cavity 112b. When the second stator end sealed cavity 100b of the present invention is filled with cooling oil, the cooling oil will be discharged from the oil through hole 154a of the second sealing cover 150 and finally flow into the oil collecting cavity 112b.

[0182] The second oil circuit is where the cooling oil enters the first housing flow channel 111a of the housing 110 through the oil inlet 112a, and then flows into the first axial D flow channel 111b of the end cover 111. The cooling oil flows from the first axial D flow channel 111b into the first radial flow channel 111c, and then communicates with the first bearing chamber 100e through the first connecting flow channel 111f to cool the first bearing 191. After cooling the first bearing 191, the cooling oil passes through the first opening 111g, the first rotor end sealing chamber 100c in sequence, and finally flows into the first oil discharge chamber 100h through the oil guide hole 142a on the first sealing cover 140, and finally flows into the oil collecting chamber 112b.

[0183] The third oil circuit is for cooling oil to enter the second housing flow channel 112c of the housing 110 after passing through the oil inlet 112a, and then flow into the second axial D flow channel 112d and the second radial flow channel 112e of the housing 112 in sequence. The cooling oil flows from the second radial flow channel 112e to the second bearing chamber 100f via the second connecting flow channel 112h to cool the second bearing 192. After cooling the second bearing 192, the cooling oil passes through the second opening 112i and the second rotor end sealing chamber 100d in sequence, and finally flows into the second oil discharge chamber 100i through the oil guide hole 155a on the second sealing cover 150, and finally flows into the oil collecting chamber 112b.

[0184] See also Figures 1 to 6 , an assembly method of the motor 100 proposed by the present invention is: install the second bearing 192 and the second sealing ring 162 into the housing 112, and use the outer circumferential surface of the second bearing seat 112f of the housing 112 to insert the second sealing cover 150 by interference fit. After the stator core 121 and the stator winding 122 are installed, insert the slot wedge 171 into each stator slot 121c of the stator core 121, and inject the sealant 172 between the slot wedge 171 and the stator winding 122. Then install the rotating shaft 180 and the rotor assembly 130. Next, install the first bearing 191 and the first sealing ring 161 in the end cover 111, and use the outer circumferential surface of the first bearing seat 111d of the end cover 111 to insert the first sealing cover 140 by interference fit. Finally, close the housing to complete the assembly of the motor 100.

[0185] The present invention has the following advantages:

[0186] 1. The present invention has a simple structure, is easy to assemble, has a low cost, and has high reliability. It avoids the reduction of structural performance of the stator teeth due to the threaded holes, and is conducive to the mass production of the proposed solution.

[0187] 2. The present invention transmits cooling oil to the stator choke through the top of the housing 110, and the cooling oil flows from the choke of the stator core 121 into the sealed cavity formed by the sealing structure of the present invention, thereby conducting away the heat generated by the stator winding 122 of the motor 100 in the sealed cavity. The present invention has a simple structure, low cost, and better heat dissipation effect.

[0188] 3. The present invention requires relatively little structural modification to the motor 100 , requiring only a groove for placing a sealing ring to be processed on the end cover 111 of the motor 100 . The present invention can be quickly switched to different motor 100 platforms, has a wider range of applications and higher reliability.

[0189] The present invention further provides a vehicle, which may include the motor 100 described above.

[0190] The vehicle according to the present invention, by applying the above-mentioned motor 100, helps to reduce manufacturing costs and improve production efficiency. At the same time, due to the better heat dissipation performance of the motor 100, it can also reduce the failure rate of the vehicle in the operation of the motor 100, ensuring that the motor 100 can operate more stably with higher power.

[0191] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. Terms such as "setting" and the like appearing in this article can mean that one component is directly attached to another component, or that one component is attached to another component through an intermediate. Features described in this article in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

[0192] The present invention has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of example and illustration, and are not intended to limit the present invention to the described embodiments. It can be understood by those skilled in the art that more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the scope of the protection claimed by the present invention.

Claims

1. A sealing cover, characterized in that: The sealing cover comprises a first cylinder portion, a second cylinder portion and a first annular plate portion, wherein the second cylinder portion is located inside the first cylinder portion, and the first annular plate portion is connected between the first cylinder portion and the second cylinder portion; The first barrel portion, the first annular plate portion and the second barrel portion are adapted to be surrounded with the axial end of the stator core to form a stator end sealed cavity for accommodating the winding; The second barrel portion is provided with a mounting portion, and the mounting portion is suitable for being connected to the housing.

2. The sealing cover according to claim 1, characterized in that: An annular bearing seat is provided on the inner wall of the housing, the inner periphery of the bearing seat forms a bearing chamber for installing the bearing, and the mounting portion is suitable for supporting the outer periphery of the bearing seat.

3. The sealing cover according to claim 2, characterized in that: The mounting portion is suitable for being attached to the inner wall of the housing.

4. The sealing cover according to claim 2, characterized in that: The sealing cover further includes a second annular plate portion connected between the second cylinder portion and the mounting portion.

5. The sealing cover according to claim 4, characterized in that: The second annular plate portion is suitable for being attached to the inner wall of the housing, or the second annular plate portion is suitable for being spaced apart from the inner wall of the housing.

6. The sealing cover according to any one of claims 1 to 5, characterized in that: The second barrel is coaxially arranged with the first barrel; one end of the first barrel along its own axial direction is suitable for being connected to the housing; One end of the second cylindrical portion along its axial direction is suitable for being connected to an axial end portion of the stator core.

7. The sealing cover according to claim 6, characterized in that: The sealing cover also includes: a third barrel portion, the third barrel portion being coaxially arranged with the second barrel portion, the third barrel portion being located inside the second barrel portion, the third barrel portion being adapted to be fixed to the outside of the bearing seat of the housing, and the third barrel portion constituting the mounting portion; and A second annular plate portion is connected between the second cylindrical portion and the third cylindrical portion.

8. The sealing cover according to claim 6, characterized in that: The first annular plate portion is provided with an oil through hole, and the oil through hole is suitable for being connected to the oil collecting chamber of the motor and the sealing chamber of the stator end.

9. The sealing cover according to claim 7, characterized in that: The sealing cover is provided with an oil guide hole, the oil guide hole is located in at least one of the second annular plate portion and the second cylinder portion, and the oil guide hole is suitable for connecting to the oil collecting chamber and the rotor end sealing chamber of the motor.

10. The sealing cover according to any one of claims 1 to 5, characterized in that: The sealing cover is provided with a wire passing hole, and the wire passing hole is suitable for passing the lead wire of the stator winding.

11. The sealing cover according to any one of claims 1 to 5, characterized in that: One end portion of the first cylindrical portion along its own axial direction constitutes a sealing abutment portion, and the sealing abutment portion is suitable for abutting against a sealing ring.

12. A motor, characterized in that: The motor comprises: chassis; a stator assembly, the stator assembly being located inside the housing, the stator assembly comprising a stator core and a stator winding, the stator core being fixed to the housing; and According to any one of claims 1 to 11, the sealing cover is arranged between the axial end of the stator core and the casing, the first cylinder portion, the first annular plate portion and the second cylinder portion and the axial end of the stator core are arranged to form a stator end sealing cavity for accommodating the stator winding, and the mounting portion is connected to the casing.

13. The motor according to claim 12, characterized in that The stator core includes stator slots; The electric machine includes a slot seal sealingly connected to a slot opening of the stator slot.

14. The motor according to claim 12, characterized in that One end of the first cylindrical portion along its own axial direction constitutes a sealing abutment portion; The motor also includes: A sealing ring is connected to the housing, the sealing ring is coaxially arranged with the sealing cover, and the sealing ring is connected to the sealing abutment portion to seal to the housing and the sealing cover.

15. The motor according to claim 12, characterized in that The casing comprises an oil inlet and an oil collecting chamber, wherein the oil inlet is located at the upper part of the casing, and the oil collecting chamber is located at the bottom of the casing; The yoke of the stator core comprises a yoke axial flow channel, the yoke axial flow channel is configured to penetrate the stator core along the axial direction of the stator core, and the yoke axial flow channel is connected to the oil inlet and the stator end sealing cavity; An oil drain chamber is formed between the sealing cover and the casing, and the oil drain chamber is connected to the oil collecting chamber; The sealing cover is provided with an oil through hole, and the oil through hole is connected to the oil drain cavity.

16. The motor according to claim 15, characterized in that The housing includes a bearing seat, and the sealing cover is fixedly connected to the bearing seat; The motor comprises: A rotating shaft is rotatably connected to the inside of the housing, the rotating shaft is coaxially arranged with the stator core, the rotating shaft and the bearing seat are surrounded to form a bearing chamber, and the bearing chamber is connected to the oil drain chamber.

17. The electric machine according to claim 16, characterized in that The casing further comprises a housing flow passage, wherein the housing flow passage is connected to the oil inlet and the bearing chamber.

18. The motor according to claim 16, characterized in that The motor also includes: A rotor assembly is fixed to the rotating shaft. The rotor assembly and the sealing cover are arranged to form a rotor end sealing cavity. The bearing chamber is connected to the oil drain cavity via the rotor end sealing cavity.

19. The electric machine according to claim 18, characterized in that An axial end of the rotating shaft is spaced apart from the housing to form a shaft end chamber, the shaft end chamber is communicated with the bearing chamber, and the rotating shaft includes a shaft center chamber, the shaft center chamber is communicated with the shaft end chamber.

20. The electric machine according to any one of claims 12 to 19, characterized in that The housing comprises an end cover and a box body, wherein the end cover is connected to the box body; The motor comprises a first sealing cover and a second sealing cover, wherein the first sealing cover is connected to the end cover and comprises a first sealing abutment portion continuously arranged along its circumferential direction, and the second sealing cover is connected to the box body and comprises a second sealing abutment portion continuously arranged along its circumferential direction; The motor includes a first sealing ring and a second sealing ring, wherein the first sealing ring is sealingly connected to the first sealing abutment portion and the end cover, and the second sealing ring is sealingly connected to the second sealing abutment portion and the housing.

21. The electric machine according to claim 20, characterized in that The end cover comprises a first sealing groove, wherein the first sealing groove is adapted to accommodate the first sealing ring; and / or The box body comprises a second sealing groove, and the second sealing groove is adapted to accommodate the second sealing ring.

22. A drive assembly, characterized in that: The drive assembly comprises an electric motor according to any one of claims 12 to 21 .

23. A vehicle, characterized in that: The vehicle comprises the motor according to any one of claims 12 to 21 , or the drive assembly according to claim 22 .

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