Slot insulation paper, stator, axial motor, electric drive assembly, and driving device

Abstract

Provided are slot insulation paper (23), a stator (20), an axial motor (100), an electric drive assembly (1001), and a driving device. The slot insulation paper (23) comprises: a main body (240), wherein the middle thereof in the width direction can be bent towards one side in the thickness direction; a first covering portion (251), arranged at one end of the main body (240) in the width direction and extending towards one side of the main body (240) in the thickness direction; a second covering portion (252), arranged at the other end of the main body (240) in the width direction and extending towards one side of the main body (240) in the thickness direction; a first folding portion (261), arranged between the main body (240) and the first covering portion (251) and extending towards the other side of the main body (240) in the thickness direction; and a second folding portion (262), arranged between the main body (240) and the second covering portion (252) and extending toward the other side of the main body (240) in the thickness direction.

Description

Slot insulation paper, stator, axial motor, electric drive assembly and drive equipment

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on June 26, 2023, with application number 202310764792.9 and invention name “Slot insulation paper, stator, axial motor, electric drive assembly and drive equipment”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application belongs to the field of motor technology, and more specifically, relates to a slot insulation paper, a stator, an axial motor, an electric drive assembly, and a drive device. Background Art

[0003] The statements herein provide only background information related to this application and do not necessarily constitute prior art. Axial motors are gaining increasing attention due to their compact structure, high efficiency, and high power density. Insulating paper-wrapped windings are placed in the stator slots of axial motors to ensure good insulation from the stator core. However, wrapping the portion of the windings in the stator slots with insulating paper is inconvenient.

[0004] Application Contents

[0005] The purpose of the embodiments of the present application is to provide a slot insulation paper, a stator, an axial motor, an electric drive assembly and a drive device to solve the problem of inconvenient installation when insulating paper is provided in the stator slot of the axial motor in the related art.

[0006] In a first aspect, an embodiment of the present application provides a slot insulation paper, comprising:

[0007] The main body has a middle portion in a width direction that can be bent toward one side in a thickness direction so as to be placed in a stator slot of the stator;

[0008] A first covering portion is provided at one end of the main body in the width direction and extends toward one side in the thickness direction of the main body;

[0009] A second covering portion is provided at the other end of the main body in the width direction and extends toward one side in the thickness direction of the main body;

[0010] The first folding portion is provided between the main body and the first covering portion and extends toward the other side in the thickness direction of the main body;

[0011] The second folding portion is arranged between the main body and the second covering portion and extends toward the other side in the thickness direction of the main body.

[0012] In the technical solution of the embodiment of the present application, a first folding portion and a second folding portion are respectively provided at opposite ends of the main body, and a first covering portion connected to the first folding portion and a second covering portion connected to the second folding portion are provided. When the main body is placed in the stator slot, the two ends of the main body are bent toward each other so that the winding is placed in the stator slot. When the winding further pushes the main body into the stator slot, the first folding portion and the second folding portion are relatively close to each other so as to be attached to the opposite side walls of the stator slot, thereby driving the first covering portion and the second covering portion to approach each other so as to be folded on the side of the winding close to the slot opening of the stator slot. Therefore, when the winding is installed, the slot insulation paper automatically surrounds the winding to facilitate assembly and improve the insulation between the winding and the slot wall of the stator slot.

[0013] In some embodiments, the sum of the widths of the first covering portion and the second covering portion is greater than or equal to the width of the stator slot.

[0014] By setting the sum of the widths of the first covering portion and the second covering portion to be greater than or equal to the width of the stator slot, after the winding is installed in the stator slot, the first covering portion and the second covering portion can cooperate to completely cover the side of the winding close to the slot opening of the stator slot, thereby improving the insulation performance.

[0015] In some embodiments, a difference between a sum of the widths of the first covering portion and the second covering portion and a width of the stator slot is greater than or equal to 1 mm.

[0016] Through the above solution, the overlapping length of the first covering portion and the second covering portion can be greater than or equal to 1 mm, thereby improving the insulation performance.

[0017] In some embodiments, the main body includes a first section, a second section and a bent section. The bent section is bent toward one side in the thickness direction of the main body. The bent section is used to guide the first section and the second section into the stator slot. The first section and the second section are arranged opposite to each other. The two ends of the bent section are respectively connected to the first section and the second section. The first folded portion is connected to the end of the first section away from the bent section, and the second folded portion is connected to the end of the second section away from the bent section.

[0018] With the above solution, when inserting the main body into the stator slot, the bent section can be inserted first, and the first section and the second section can be guided to be inserted into the stator slot for easy installation.

[0019] In some embodiments, the curved segment is arc-shaped, or the curved segment includes a plurality of broken line segments connected in sequence.

[0020] The curved section is arranged in an arc shape, which can be easily processed and manufactured to guide the first section and the second section into the stator slot.

[0021] The curved section is provided with a plurality of broken line segments connected in sequence, which can be easily processed and manufactured.

[0022] In some embodiments, the curved segment includes a first subsegment and a second subsegment arranged obliquely to the first subsegment, the first subsegment is connected to the second subsegment, the first segment is connected to the first subsegment, and the second segment is connected to the second subsegment.

[0023] By providing the first sub-segment and the second sub-segment that are inclined to each other, the manufacturing is convenient and the insertion into the stator slot is also convenient.

[0024] In some embodiments, the bending section also includes a first guide section and a second guide section, the first guide section connects the first sub-segment and the first section, and the first guide section and the first sub-segment are bent at an obtuse angle; the second guide section connects the second sub-segment and the second section, and the second guide section and the second sub-segment are bent at an obtuse angle.

[0025] A first guide segment and a second guide segment are provided. When the first sub-segment and the second sub-segment are inserted into the stator slot, the inclination angles of the first guide segment and the second guide segment to the side wall of the stator slot can be made smaller, so as to facilitate entry into the stator slot and reduce scratches on the first guide segment and the second guide segment.

[0026] In some embodiments, the first sub-segment and the second sub-segment are connected by an arc segment transition.

[0027] The arc segment is provided to reduce the crease damage at the connection between the first sub-segment and the second sub-segment, so as to improve the insulation performance of the slot insulation paper.

[0028] In some embodiments, the body is a unitary structure.

[0029] The main body is formed in one piece to facilitate processing and manufacturing and to improve the insulation performance of the main body.

[0030] In some embodiments, the slot insulation paper is a one-piece structure.

[0031] Molding the slot insulation paper in one piece can facilitate production and improve the overall insulation performance of the slot insulation paper.

[0032] In some embodiments, the first covering portion is extended by bending an end of the first folding portion away from the main body;

[0033] And / or, the second covering portion is extended by bending from one end of the second folding portion away from the main body;

[0034] And / or, the first folding portion is bent and extended from one end of the main body;

[0035] And / or, the second folding portion is bent and extended from the other end of the main body.

[0036] One end portion of the first folded portion is bent to form a first covering portion, which is convenient for processing and manufacturing.

[0037] One end portion of the second folded portion is bent to form a second covering portion, which is convenient for processing and manufacturing.

[0038] One end portion of the main body is bent to form a first folded portion, which is convenient for processing and manufacturing.

[0039] The other end of the main body is bent to form a first folded portion for ease of processing and manufacturing.

[0040] In some embodiments, the first folded portion is connected to the main body via an arc-shaped transition;

[0041] And / or, the second folded portion is connected to the main body via an arc-shaped transition;

[0042] And / or, the first covering portion and the first folding portion are connected via an arc-shaped transition;

[0043] And / or, the second covering portion and the second folding portion are connected via an arc-shaped transition.

[0044] The first folded portion transitions to the main body in an arc shape, which can reduce crease damage and improve the insulation performance of the slot insulation paper.

[0045] The second folded portion transitions to the main body in an arc shape, which can reduce crease damage and improve the insulation performance of the slot insulation paper.

[0046] The first covering portion transitions to the first folding portion in an arc shape, which can reduce crease damage and improve the insulation performance of the slot insulation paper.

[0047] The second covering portion transitions to the second folded portion in an arc shape, which can reduce crease damage and improve the insulation performance of the slot insulation paper.

[0048] In a second aspect, an embodiment of the present application provides a stator, comprising the slot insulation paper as described in any of the above embodiments.

[0049] In some embodiments, the stator further includes a stator core and a winding. The stator core is provided with a plurality of stator teeth, and stator slots are formed between adjacent stator teeth. The winding is installed in the stator slots, and slot insulation paper is placed in the stator slots, and the slot insulation paper is arranged around the winding.

[0050] By arranging slot insulation paper in the stator slot, when the winding presses the slot insulation paper into the stator slot, the slot insulation paper can be wound around the winding to improve the insulation performance between the winding and the slot wall of the stator slot.

[0051] In some embodiments, the stator further includes a positioning member for pressing the first covering portion and the second covering portion of the slot insulation paper, and the positioning member is installed in the stator slot.

[0052] A positioning piece is provided to press the first covering part and the second covering part, thereby positioning the slot insulation paper close to the slot opening of the stator slot, which can effectively prevent the first covering part and the second covering part from opening, so as to better surround the winding and improve the insulation performance.

[0053] In some embodiments, a slot for clamping the positioning member is provided on the side wall of the stator slot.

[0054] A clamping groove is provided on the side wall of the stator slot to clamp the positioning piece, thereby facilitating the installation and fixation of the positioning piece.

[0055] In a third aspect, an embodiment of the present application provides an axial motor, comprising a stator as described in the above embodiment.

[0056] In a fourth aspect, an embodiment of the present application provides an electric drive assembly, comprising an axial motor as described in the above embodiment.

[0057] In a fifth aspect, an embodiment of the present application provides a driving device, comprising the axial motor as described in the above embodiment; or comprising the electric drive assembly as described in the above embodiment.

[0058] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or exemplary technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0060] FIG1 is a schematic structural diagram of a vehicle according to some embodiments of the present application;

[0061] FIG2 is a schematic structural diagram of an axial motor according to some embodiments of the present application;

[0062] FIG3 is a schematic structural diagram of an axial motor according to some other embodiments of the present application;

[0063] FIG4 is a schematic structural diagram of an axial motor according to some other embodiments of the present application;

[0064] FIG5 is a schematic structural diagram of an axial motor according to some other embodiments of the present application;

[0065] FIG6 is a schematic diagram of a partial structure of a stator according to some embodiments of the present application;

[0066] FIG7 is a schematic cross-sectional view of the structure along line AA in FIG6 ;

[0067] FIG8 is a schematic diagram of the structure of the slot insulation paper in FIG7;

[0068] FIG9 is a schematic structural diagram of the bent section of the slot insulation paper shown in FIG8 being inserted into the stator slot;

[0069] FIG10 is a schematic structural diagram of the main body of the slot insulation paper in FIG9 being inserted into the stator slot;

[0070] FIG11 is a schematic diagram of the structure of the slot insulation paper and windings installed in the stator slots in FIG7 ;

[0071] FIG12 is a schematic structural diagram of a positioning member installed in a stator slot according to some embodiments of the present application;

[0072] FIG13 is a schematic structural diagram of slot insulation paper according to other embodiments of the present application;

[0073] FIG14 is a schematic structural diagram of slot insulation paper in yet other embodiments of the present application;

[0074] FIG15 is a schematic structural diagram of slot insulation paper according to some other embodiments of the present application;

[0075] FIG16 is a schematic structural diagram of slot insulation paper according to some further embodiments of the present application.

[0076] Among them, the main markings in the figures are: 1000-vehicle; 1001-electric drive assembly; 100-axial motor; 200-transmission; 1002-controller; 1003-battery; 10-rotor; 20-stator; 21-stator core; 210-stator slot; 211-stator tooth; 22-winding; 23-slot insulation paper; 240-main body; 241-first section; 242-second section; 243-bent section; 2431-first sub-segment; 2432-second sub-segment; 2433-arc section; 2434-first guide section; 2435-second guide section; 251-first covering part; 252-second covering part; 261-first folding part; 262-second folding part; 27-positioning member; 30-rotating shaft. DETAILED DESCRIPTION

[0077] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0078] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0079] In the description of the embodiments of this application, the technical terms "first," "second," etc., are used solely to distinguish between different objects and should not be understood to indicate or imply relative importance, or to implicitly specify the quantity, specific order, or primary-secondary relationship of the technical features indicated. Therefore, a feature designated "first" or "second" may explicitly or implicitly include one or more of such features.

[0080] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments in any suitable manner.

[0081] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0082] In the description of the embodiments of this application, the term "plurality" refers to two or more (including two). Similarly, "multiple groups" refers to two or more (including two groups), and "multiple sheets" refers to two or more (including two sheets). "Several" means one or more, unless otherwise specifically defined.

[0083] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0084] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0085] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, when an element is referred to as being “fixed to” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0086] In the description of the embodiments of this application, unless otherwise specified or limited, the technical term "adjacent" refers to proximity in position. For example, if there are three components A1, A2, and B, and the distance between A1 and B is greater than the distance between A2 and B, then A2 is closer to B than A1, that is, A2 is adjacent to B, or B is adjacent to A2. For another example, when there are multiple components C, the multiple components C are C1, C2, ..., C N , when one of the C components, such as C2, is closer to the B component than other C components, then B is adjacent to C2, or it can be said that C2 is adjacent to B.

[0087] A drive structure that uses an electric motor as a power source is generally referred to as an electric drive. Integrating the electric motor with one or more components, such as a cooling system, a transmission mechanism, and a controller, forms an electric drive assembly. This assembly is also known as an electric drive assembly or electric drive unit. The electric drive assembly is the primary power unit of an electric vehicle, converting the electrical energy provided by the battery into mechanical energy to propel the vehicle. Currently, electric drive assemblies can be categorized as centralized or distributed. Centralized electric drive assemblies transmit the motor's output torque to the left and right wheels of the electric vehicle via mechanical transmission devices such as a transmission and a reducer to propel the vehicle. Distributed electric drive assemblies typically include at least two electric motors, each of which transmits its output torque to a single wheel. This allows for independent control of each wheel. Consequently, compared to electric vehicles using centralized electric drive assemblies, electric vehicles using distributed electric drive assemblies offer improved maneuverability, making distributed electric drive assemblies increasingly popular with automakers.

[0088] A motor, also known as an electric motor, generally consists of a rotor and a stator. A motor converts electrical energy into mechanical energy. It uses a energized coil to generate a rotating magnetic field, which acts on the rotor to generate magneto-electrodynamic torque. The stationary part of the motor is called the stator, while the rotating part is called the rotor. The stator drives the rotor to rotate, converting electrical energy into mechanical energy, thereby generating torque.

[0089] In some cases, the motor doesn't directly output power; a speed change mechanism is incorporated into the electric drive assembly's housing. For example, in situations where high torque is required, a speed reducer is often incorporated into the housing to boost torque and output power through the speed reducer. Speed ​​reducers are also used in situations where lower drive speeds are required. In situations where higher speeds are required, a speed booster is also required to increase the output speed. In other words, some electric drive assemblies also incorporate a speed change mechanism. A speed change mechanism, also known as a gearbox, is used to vary the speed and torque from the motor. It can adjust the transmission ratio between the output and input shafts in fixed or step-by-step fashion. The speed change mechanism consists of a variable speed transmission assembly. While most transmission assemblies utilize conventional gears, some utilize planetary gears, and others utilize belt drives.

[0090] Electric motors can be categorized as radial or axial. A radial motor is one in which the stator and rotor are arranged radially, such as with the stator positioned on the outer periphery of the rotor or with the rotor positioned on the outer periphery of the stator. In other words, a motor in which the stator is sleeved around the outer periphery of the rotor or with the rotor sleeved around the outer periphery of the stator is a radial motor. An axial motor is one in which the stator and rotor are arranged axially. In an axial motor, the stator is positioned to the side of the rotor, and accordingly, the rotor is also positioned to the side of the stator. For ease of description, the side of the rotor closest to the stator is defined as the stator side.

[0091] Axial motors are gaining increasing attention due to their compact structure, high efficiency, and high power density. The stator is located on the side of the rotor and typically consists of a stator core and windings. Stator teeth are arranged in a circular pattern on the side of the stator core, with slots forming the gaps between adjacent teeth. The stator windings are placed in the stator slots to generate an electromagnetic field.

[0092] Since windings are set in the stator slots, a voltage difference will be formed between the windings and the slot walls of the stator slots when the windings are working. This requires insulating paper to be set in the stator slots to wrap the windings to insulate the windings from the slot walls of the stator slots and improve the insulation performance.

[0093] The stator slot walls refer to the two opposing side walls of the stator slot and the bottom wall of the stator slot. The opening of the stator slot opposite the bottom is the stator slot opening. The sidewalls between the slot opening and the bottom of the stator slot are the stator slot sidewalls.

[0094] However, since the winding presses the slot insulation paper into the stator slot, the opposite ends of the slot insulation paper need to be bent and folded to wrap the winding, which makes installation inconvenient. If the folding is not done properly, the insulation performance will be reduced.

[0095] Based on the above considerations, in order to solve the problem that after the winding of the axial motor presses the slot insulation paper into the stator slot, the ends of the slot insulation paper need to be folded, which makes installation inconvenient, an embodiment of the present application provides a slot insulation paper, wherein a first folding portion and a second folding portion are respectively provided at both ends of the main body of the slot insulation paper, and the first covering portion is connected to the first folding portion, and the second covering portion is connected to the second folding portion, so that the first covering portion and the second covering portion both extend toward one side in the thickness direction of the main body, and the first folding portion and the second folding portion both extend toward the other side in the thickness direction of the main body. When the main body is bent and inserted into the stator slot and the winding presses the main body into the stator slot, the slot wall of the stator slot and the winding jointly push the first folding portion and the second folding portion to move, thereby driving the first covering portion and the second covering portion to approach each other to overlap, thereby wrapping the winding and facilitating installation.

[0096] The slot insulation paper disclosed in the embodiment of the present application can be applied to the stator of an axial motor. The stator disclosed in the embodiment of the present application can be used in an axial motor. The axial motor can be used as a power structure to be applied to an electric drive assembly, a drive device, etc. as a power source. The electric drive assembly can also be applied to a drive device. The drive device can be, but is not limited to, an electric toy, an electric tool, an electric bicycle, an electric motorcycle, an electric car, a ship, a spacecraft, and the like. Electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like, and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, and the like.

[0097] The drive device can be an electric vehicle or a vehicle chassis. The axial motor can be integrated with one or more of the power supply, controller, gearbox and other components to form an electric drive assembly.

[0098] For the convenience of explanation, a driving device is provided in accordance with an embodiment of the present application, and the driving device is described by taking a vehicle as an example.

[0099] Please refer to Figure 1, which is a schematic structural diagram of a vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. An electric drive assembly 1001 is provided inside the vehicle 1000, and the electric drive assembly 1001 can be provided at the bottom, head or tail of the vehicle 1000. The electric drive assembly 1001 can be used to increase the power of the vehicle 1000. The vehicle 1000 may also include a controller 1002 and a battery 1003. The controller 1002 is used to control the operation of the electric drive assembly 1001, for example, to control the start, speed change and stop of the electric drive assembly 1001. The controller 1002 can also be used to control the battery 1003 to supply power to the electric drive assembly 1001, for example, to meet the power requirements of the vehicle 1000 during start-up, navigation and driving.

[0100] In some embodiments, the electric drive assembly 1001 includes an axial motor 100, which serves as a power source for the electric drive assembly 1001. It is understood that the electric drive assembly 1001 is not limited to use in the vehicle 1000, but can also be used in other devices requiring power output.

[0101] In some embodiments, the electric drive assembly 1001 may further include a transmission 200, which is connected to the axial motor 100 to achieve torque variation of the axial motor 100. The transmission 200 (also known as a gearbox) is a mechanism used to change the speed and torque of the engine. It can change the output shaft and input shaft transmission ratio in a fixed or step-by-step manner.

[0102] In some embodiments, the controller 1002 may be integrated with the axial motor 100 to form an electric drive assembly 1001 .

[0103] In some embodiments, the battery 1003 may be integrated with the axial motor 100 to form an electric drive assembly 1001 .

[0104] In some embodiments, the transmission 200 and the controller 1002 may be integrated with the axial motor 100 to form an electric drive assembly 1001 .

[0105] In some embodiments, the transmission 200, the controller 1002, and the battery 1003 may be integrated with the axial motor 100 to form an electric drive assembly 1001. Of course, the electric drive assembly 1001 may also be integrated with other structures, such as a cooling oil circuit.

[0106] Please refer to FIG. 2 , which is a schematic structural diagram of an axial motor 100 provided in an embodiment of the present application.

[0107] An embodiment of the present application provides an axial motor 100 , which includes a rotating shaft 30 , a stator 20 , and a rotor 10 . The rotor 10 is fixedly mounted on the rotating shaft 30 , and the stator 20 is located on a side of the rotor 10 .

[0108] The rotating shaft 30 refers to a shaft-shaped component in the axial motor 100 for outputting power. The rotating shaft 30 is fixedly connected to the rotor 10 and can rotate under the drive of the rotor 10 to output power.

[0109] The stator 20 and the rotating shaft 30 can rotate relative to each other, thereby enabling the stator 20 to rotate relative to the rotor 10. For example, in some embodiments, the stator 20 can be supported on the rotating shaft 30 via bearings. In some other embodiments, when the axial motor 100 includes a housing, the stator 20 can be fixed to the housing, supported by the housing, while the rotor 10 and the rotating shaft 30 are rotatably mounted in the housing, allowing the stator 20 to rotate relative to the rotor 10, thereby facilitating the stator 20 driving the rotor 10 to rotate.

[0110] The stator 20 is located on the side of the rotor 10 , which means that the stator 20 is located on one side of the rotor 10 in the axial direction, so that the stator 20 drives the rotor 10 to rotate, thereby driving the rotating shaft 30 to rotate.

[0111] The axial direction refers to the axial direction of the rotating shaft 30 , and the axial direction of the rotating shaft 30 is also the axial direction of the stator 20 and the axial direction of the rotor 10 . Therefore, the axial direction also refers to the axial direction of the rotor 10 .

[0112] The radial direction refers to the radial direction of the rotating shaft 30 , and the radial direction of the rotating shaft 30 is also the radial direction of the stator 20 and the radial direction of the rotor 10 . Therefore, the radial direction also refers to the radial direction of the rotor 10 .

[0113] The circumferential direction refers to a direction around the axial direction of the rotating shaft 30 , and is also a direction around the axial direction of the rotor 10 .

[0114] In some embodiments, there can be one rotor 10 and one stator 20, and the stator 20 is located on one side of the rotor 10. The axial motor 100 has a simple structure and a small size. In this structure, the side of the rotor 10 close to the stator 20 is the stator side.

[0115] Please refer to FIG. 3 , which is a schematic structural diagram of an axial motor 100 provided in an embodiment of the present application.

[0116] In some embodiments, an axial motor 100 includes two stators 20 and a rotor 10. The two stators 20 are located on opposite sides of the rotor 10. This allows the two stators 20 to drive the rotor 10 to rotate, thereby increasing output power. Furthermore, this axial motor 100 has a more compact structure. In this structure, since the stators 20 are located on opposite sides of the rotor 10, both opposite sides of the rotor 10 are stator sides.

[0117] Please refer to FIG. 4 , which is a schematic structural diagram of an axial motor 100 provided in an embodiment of the present application.

[0118] In some embodiments, an axial motor 100 includes two rotors 10 and a stator 20. The two rotors 10 are located on opposite sides of the stator 20. This allows a single stator 20 to drive both rotors 10 and the same rotating shaft 30, thereby increasing output power. Furthermore, this axial motor 100 has a more compact structure. In this structure, since the stator 20 is located on one side of each rotor 10, the side of the rotor 10 closest to the stator 20 is the stator side.

[0119] Please refer to FIG5 , which is a schematic structural diagram of an axial motor 100 provided in an embodiment of the present application.

[0120] In some embodiments, the axial motor 100 includes multiple rotors 10 and multiple stators 20. A stator 20 is positioned between two adjacent rotors 10, and a rotor 10 is positioned between two adjacent stators 20. The multiple stators 20 drive the multiple rotors 10 to rotate, which in turn drives the shaft 30 to rotate, thereby increasing output power. In this structure, the side of each rotor 10 closest to the stator 20 is the stator side.

[0121] Please refer to Figures 6 to 11. Figure 6 is a schematic diagram of the partial structure of the stator 20 in some embodiments of the present application. Figure 7 is a schematic diagram of the cross-sectional structure along line AA in the figure, in which the winding 22 only presses the main body 240 of the slot insulation paper 23 into the stator slot 210. Figure 8 is a schematic diagram of the structure of the slot insulation paper 23 in some embodiments of the present application. Figure 9 is a schematic diagram of the structure of the bent section 243 of the slot insulation paper 23 shown in Figure 8 inserted into the stator slot 210. Figure 10 is a schematic diagram of the structure of the main body 240 of the slot insulation paper 23 in Figure 9 inserted into the stator slot 210. Figure 11 is a schematic diagram of the structure of the slot insulation paper 23 and the winding 22 in Figure 7 installed in the stator slot 210.

[0122] An embodiment of the present application provides a stator 20, including a stator core 21, a winding 22 and slot insulation paper 23. The stator core 21 is provided with a plurality of stator teeth 211, and stator slots 210 are formed between adjacent stator teeth 211. The winding 22 is installed in the stator slots 210, and the slot insulation paper 23 is placed in the stator slots 210. The slot insulation paper 23 is arranged around the winding 22.

[0123] The stator core 21 is an important part of the stator 20 and mainly plays the role of support and magnetic conduction.

[0124] The stator teeth 211 are protruding portions on the stator core 21 for conducting magnetic flux. Stator slots 210 are formed between adjacent stator teeth 211 . The stator slots 210 are used to accommodate the windings 22 . That is, the windings 22 are installed in the stator slots 210 .

[0125] The winding 22 refers to a structure in which coils are arranged and connected in a certain pattern to generate an electromagnetic field when energized.

[0126] Slot insulation paper 23 is an insulating paper disposed in stator slots 210 to insulate the winding 22 from the slot walls of the stator slots 210. After the slot insulation paper 23 and winding 22 are installed in the stator slots 210, the slot insulation paper 23 wraps around the winding 22 to insulate the winding 22 from the slot walls of the stator slots 210. The slot insulation paper 23 can be made of paper, but other insulating materials, such as insulating plastic sheets, are also possible.

[0127] By providing slot insulation paper 23 in the stator slot 210 , when the winding 22 presses the slot insulation paper 23 into the stator slot 210 , the slot insulation paper 23 can surround the winding 22 , thereby improving the insulation performance between the winding 22 and the slot wall of the stator slot 210 .

[0128] The slot insulation paper 23 has a length direction, a width direction, and a thickness direction. When in use, the length direction of the slot insulation paper 23 is consistent with the length direction of the stator slot 210. The width direction of the slot insulation paper 23 is the width direction when the slot insulation paper 23 is unfolded into a flat surface. When the slot insulation paper 23 is unfolded into a flat surface, the width direction is perpendicular to the length direction of the slot insulation paper 23. The thickness direction of the slot insulation paper 23 is the thickness direction when the slot insulation paper 23 is unfolded into a flat surface.

[0129] Since the slot insulation paper 23 is a sheet-like structure, it has two opposite sides along the thickness direction and two opposite surfaces, and the two opposite surfaces are respectively located on two sides of the slot insulation paper 23 in the thickness direction.

[0130] The slot insulation paper 23 has two opposite ends, which are opposite ends along the width direction of the slot insulation paper 23 .

[0131] 6 to 11 , an embodiment of the present application provides a slot insulation paper 23 , comprising a main body 240 , a middle portion of which in the width direction can be bent toward one side in the thickness direction for placement in the stator slot 210 of the stator 20 ; a first covering portion 251 , disposed at one end of the main body 240 in the width direction and extending toward one side in the thickness direction of the main body 240 ; a second covering portion 252 , disposed at the other end of the main body 240 in the width direction and extending toward one side in the thickness direction of the main body 240 ; a first folding portion 261 , disposed between the main body 240 and the first covering portion 251 , and extending toward the other side in the thickness direction of the main body 240 ; and a second folding portion 262 , disposed between the main body 240 and the second covering portion 252 , and extending toward the other side in the thickness direction of the main body 240 .

[0132] The main body 240 refers to the middle region of the slot insulation paper 23 in the width direction after it is unfolded. The middle portion of the main body 240 in the width direction can be bent toward one side in the thickness direction for placement in the stator slot 210 of the stator 20. This means that during installation, the main body 240 can be bent from the middle position in the width direction toward one side in the thickness direction of the main body 240 to facilitate insertion into the stator slot 210. The bending of the main body 240 can be active pre-bending or passive bending caused by the winding 22 and the sidewall of the stator slot 210 being squeezed together as the winding 22 presses the main body 240 into the stator slot 210.

[0133] When the slot insulation paper 23 is unfolded into a plane, the thickness direction of the slot insulation paper 23, the thickness direction of the main body 240, the thickness direction of the first covering part 251, the thickness direction of the second covering part 252, the thickness direction of the first folding part 261 and the thickness direction of the second folding part 262 are consistent.

[0134] The first covering portion 251 refers to one end portion in the width direction of the slot insulation paper 23 , that is, the first covering portion 251 is provided at one end in the width direction of the main body 240 . When in use, the first covering portion 251 covers the side of the winding 22 close to the slot opening of the stator slot 210 .

[0135] The first covering portion 251 is extended toward one side in the thickness direction of the main body 240 , which means that when the main body 240 is unfolded into a planar shape, the first covering portion 251 extends toward one side in the thickness direction of the main body 240 .

[0136] The second covering portion 252 refers to the other end portion in the width direction of the slot insulation paper 23 , that is, the second covering portion 252 is arranged at the other end in the width direction of the main body 240 . When in use, the second covering portion 252 covers the side of the winding 22 close to the slot opening of the stator slot 210 .

[0137] The second covering portion 252 is extended toward one side in the thickness direction of the main body 240 , which means that when the main body 240 is unfolded into a planar shape, the second covering portion 252 extends toward one side in the thickness direction of the main body 240 .

[0138] The first folded portion 261 refers to a partial area on the slot insulating paper 23 , and the first folded portion 261 is a partial area on the slot insulating paper 23 between the first covering portion 251 and the main body 240 , and the two ends of the first folded portion 261 respectively connect the main body 240 and the first covering portion 251 .

[0139] The first folding portion 261 is extended toward the other side of the thickness direction of the main body 240 , which means that when the main body 240 is unfolded into a planar shape, the first folding portion 261 extends toward the other side of the thickness direction of the main body 240 .

[0140] Because the first folded portion 261 is located between the main body 240 and the first covering portion 251, when the slot insulation paper 23 is flattened, the first covering portion 251 extends toward one side of the first folded portion 261 in the thickness direction, while the first folded portion 261 extends toward the other side of the main body 240 in the thickness direction. This structure causes the first folded portion 261 to cause the entire first covering portion 251 to tilt toward one side of the main body 240 in the thickness direction when the first folded portion 261 is squeezed to make the connection between the first folded portion 261 and the main body 240 flat.

[0141] The second folded portion 262 refers to a partial area on the slot insulating paper 23 , and the second folded portion 262 is a partial area on the slot insulating paper 23 between the second covering portion 252 and the main body 240 , and the two ends of the second folded portion 262 respectively connect the main body 240 and the second covering portion 252 .

[0142] The second folding portion 262 is extended toward the other side of the thickness direction of the main body 240 , which means that when the main body 240 is unfolded into a planar shape, the second folding portion 262 extends toward the other side of the thickness direction of the main body 240 .

[0143] Because the second folded portion 262 is located between the main body 240 and the second covering portion 252, when the slot insulation paper 23 is flattened, the second covering portion 252 extends toward one side of the second folded portion 262 in the thickness direction, while the second folded portion 262 extends toward the other side of the main body 240 in the thickness direction. This structure causes the second folded portion 262 to cause the entire second covering portion 252 to tilt toward one side of the main body 240 in the thickness direction when the second folded portion 262 is squeezed to make the connection between the second folded portion 262 and the main body 240 level.

[0144] The main body 240 has two opposing sides along its thickness, namely a first side and a second side. A first folding portion 261 extends from one end of the main body 240 in the width direction toward the second side of the main body 240, and a second folding portion 262 extends from the other end of the main body 240 in the width direction toward the second side of the main body 240. A first covering portion 251 extends from the end of the first folding portion 261 away from the main body 240 toward the first side of the main body 240; and a second covering portion 252 extends from the end of the second folding portion 262 away from the main body 240 toward the first side of the main body 240.

[0145] During use, since the middle portion of the main body 240 in the width direction is bent to one side, the opposite ends of the main body 240 can be relatively close to each other so as to be inserted into the stator slot 210; the winding 22 is placed between the two ends of the main body 240 and pressed into the stator slot 210, and enters the stator slot 210 at both ends of the main body 240 and transitions to the first folded portion 261 and the second folded portion 262. In the process of the first folded portion 261 and the second folded portion 262 entering the stator slot 210, the first folded portion 261 and the second folded portion 262 will approach each other under the cooperation and extrusion of the winding 22 and the side wall of the stator slot 210, thereby driving the first covering portion 251 and the second covering portion 252 to approach each other and overlap on the side of the winding 22 close to the slot opening of the stator slot 210, so as to wrap the winding 22, thereby realizing automatic winding of the winding 22, convenient installation and high efficiency.

[0146] In the technical solution of the embodiment of the present application, a first folding portion 261 and a second folding portion 262 are respectively provided at opposite ends of the main body 240, and a first covering portion 251 connected to the first folding portion 261 and a second covering portion 252 connected to the second folding portion 262 are provided. When the main body 240 is placed in the stator slot 210, the two ends of the main body 240 are bent toward each other so that the winding 22 is placed in the stator slot 210. When the winding 22 further pushes the main body 240 into the stator slot 210, the first folding portion 261 and the second folding portion 262 are relatively close to each other to be attached to the opposite side walls of the stator slot 210, thereby driving the first covering portion 251 and the second covering portion 252 to approach each other and fold over the side of the winding 22 close to the slot opening of the stator slot 210. Therefore, when the winding 22 is installed, the slot insulation paper 23 automatically surrounds the winding 22, thereby facilitating assembly and improving the insulation between the winding 22 and the slot wall of the stator slot 210.

[0147] In some embodiments, referring to Figures 7, 8, and 11, the sum of the widths of the first covering portion 251 and the second covering portion 252 is greater than or equal to the width of the stator slot 210. For example, if the width of the first covering portion 251 is H1, the width of the second covering portion 252 is H2, and the width of the stator slot 210 is H3, then H1+H2≥H3.

[0148] The sum of the widths of the first covering portion 251 and the second covering portion 252 is set to be greater than or equal to the width of the stator slot 210. After the winding 22 is installed in the stator slot 210, the first covering portion 251 and the second covering portion 252 can cooperate to completely cover the side of the winding 22 close to the slot opening of the stator slot 210 to improve the insulation performance.

[0149] In some embodiments, the difference between the sum of the widths of the first covering portion 251 and the second covering portion 252 and the width of the stator slot 210 is greater than or equal to 1 millimeter (mm). For example, if the width of the first covering portion 251 is H1, the width of the second covering portion 252 is H2, and the width of the stator slot 210 is H3, then H1+H2-H3≥1mm. This arrangement ensures that the overlapping length of the first covering portion 251 and the second covering portion 252 is greater than or equal to 1mm, allowing the first covering portion 251 and the second covering portion 252 to better overlap and cover the side of the winding 22 near the slot opening of the stator slot 210, thereby improving insulation performance.

[0150] In some embodiments, referring to Figures 7, 8, 9 and 11, the main body 240 includes a first section 241, a second section 242 and a bent section 243. The bent section 243 is bent toward one side in the thickness direction of the main body 240. The bent section 243 is used to guide the first section 241 and the second section 242 into the stator slot 210. The first section 241 and the second section 242 are arranged opposite to each other. The two ends of the bent section 243 are respectively connected to the first section 241 and the second section 242. The first folding portion 261 is connected to the end of the first section 241 away from the bent section 243, and the second folding portion 262 is connected to the end of the second section 242 away from the bent section 243.

[0151] The first section 241 refers to a partial area at one end of the body 240 in the width direction.

[0152] The second section 242 refers to a partial area at the other end of the body 240 in the width direction.

[0153] The curved section 243 is located between the first section 241 and the second section 242 and connects the first section 241 and the second section 242 .

[0154] The curved section 243 is bent toward one side in the thickness direction of the main body 240, allowing the first section 241 and the second section 242 to be positioned closer together and spaced relatively apart. This facilitates insertion of the curved section 243 into the stator slot 210, guiding the first and second sections 241, 242 into the stator slot 210 through the curved section 243. Furthermore, it facilitates placement of the winding 22 between the first and second sections 241, 242, facilitating installation of the winding 22 in the stator slot 210 and facilitating assembly. Furthermore, the provision of the curved section 243 reduces scratching of the curved section 243 by the sidewalls of the stator slot 210, thereby improving insulation performance.

[0155] The first folding portion 261 is connected to the end of the first section 241 away from the curved section 243 , which means that the first section 241 is located between the curved section 243 and the first folding portion 261 , and the first folding portion 261 and the curved section 243 are connected via the first section 241 .

[0156] The second folding portion 262 is connected to the end of the second section 242 away from the curved section 243 , which means that the second section 242 is located between the curved section 243 and the second folding portion 262 , and the second folding portion 262 and the curved section 243 are connected via the second section 242 .

[0157] The first section 241 is arranged to pass through the curved section 243 and then bend to transition to the second section 242. When the main body 240 is inserted into the stator slot 210, the curved section 243 can be inserted first, and the first section 241 and the second section 242 can be guided to be inserted into the stator slot 210 for installation.

[0158] In some embodiments, the curved segment 243 includes a first subsegment 2431 and a second subsegment 2432 inclined relative to the first subsegment 2431 , the first subsegment 2431 is connected to the second subsegment 2432 , the first segment 241 is connected to the first subsegment 2431 , and the second segment 242 is connected to the second subsegment 2432 .

[0159] The first sub-segment 2431 refers to a portion of the curved segment 243 .

[0160] The second sub-segment 2432 refers to a portion of the curved segment 243 .

[0161] The first subsegment 2431 is connected to the second subsegment 2432 , and the first subsegment 2431 is tilted relative to the second subsegment 2432 to achieve a curved arrangement from the first subsegment 2431 to the second subsegment 2432 .

[0162] The first segment 241 and the first subsegment 2431 are connected, which means that the first subsegment 2431 is located between the first segment 241 and the second subsegment 2432 , and the first subsegment 2431 connects the first segment 241 and the second subsegment 2432 .

[0163] The second segment 242 and the second subsegment 2432 are connected, which means that the second subsegment 2432 is located between the second segment 242 and the first subsegment 2431 , and the second subsegment 2432 connects the second segment 242 and the first subsegment 2431 .

[0164] By providing the first sub-segment 2431 and the second sub-segment 2432 which are inclined to each other, it is easy to manufacture and insert into the stator slot 210 .

[0165] In some embodiments, referring to Figures 7, 8, 9 and 11, the curved section 243 also includes a first guide section 2434 and a second guide section 2435. The first guide section 2434 connects the first sub-segment 2431 and the first section 241, and the first guide section 2434 and the first sub-segment 2431 are bent at an obtuse angle; the second guide section 2435 connects the second sub-segment 2432 and the second section 242, and the second guide section 2435 and the second sub-segment 2432 are bent at an obtuse angle.

[0166] The first guiding section 2434 refers to a portion of the curved section 243 close to the first section 241 .

[0167] The first guide segment 2434 is located between the first sub-segment 2431 and the first segment 241 , and connects the first sub-segment 2431 and the first segment 241 .

[0168] The first guide segment 2434 and the first sub-segment 2431 are bent at an obtuse angle, which means that the angle between the first guide segment 2434 and the first sub-segment 2431 is an obtuse angle.

[0169] The second guiding section 2435 refers to a portion of the curved section 243 close to the second section 242 .

[0170] The second guide segment 2435 is located between the second sub-segment 2432 and the second segment 242 , and connects the second sub-segment 2432 and the second segment 242 .

[0171] The second guide segment 2435 and the second sub-segment 2432 are bent at an obtuse angle, which means that the angle between the second guide segment 2435 and the second sub-segment 2432 is an obtuse angle.

[0172] A first guide segment 2434 and a second guide segment 2435 are provided. When the first sub-segment 2431 and the second sub-segment 2432 are inserted into the stator slot 210, the inclination angle between the first guide segment 2434 and the second guide segment 2435 and the side wall of the stator slot 210 can be made smaller, so as to facilitate entry into the stator slot 210 and reduce scratches on the first guide segment 2434 and the second guide segment 2435.

[0173] In some embodiments, referring to FIG. 7 , FIG. 8 , FIG. 9 and FIG. 11 , the first sub-segment 2431 and the second sub-segment 2432 are transitionally connected via an arc segment 2433 .

[0174] The arc segment 2433 is a portion of the curved segment 243 located between the first sub-segment 2431 and the second sub-segment 2432. The arc segment 2433 is curved in width and has two ends connected to the first sub-segment 2431 and the second sub-segment 2432, respectively.

[0175] The arc segment 2433 is provided to reduce crease damage at the connection between the first sub-segment 2431 and the second sub-segment 2432 , thereby improving the insulation performance of the slot insulation paper 23 .

[0176] In some embodiments, the body 240 is a unitary structure.

[0177] The main body 240 is an integrally formed structure, which means that the main body 240 is manufactured in one piece, for example, a relatively wide insulating paper can be used and formed by bending.

[0178] The main body 240 is integrally formed to facilitate processing and manufacturing and to improve the insulation performance of the main body 240 .

[0179] In some embodiments, the various parts of the main body 240 can be fixedly connected by bonding or other methods.

[0180] In some embodiments, the slot insulation paper 23 is an integrally formed structure.

[0181] The slot insulation paper 23 is integrally formed, which means that the slot insulation paper 23 is integrally formed as a whole. For example, a larger insulation paper can be used and directly stamped.

[0182] The slot insulation paper 23 is integrally formed, which can facilitate production and improve the overall insulation performance of the slot insulation paper 23 .

[0183] 7 , 8 , 9 and 11 , the first covering portion 251 is formed by bending and extending the first folding portion 261 away from the main body 240 . In other words, a portion of the first folding portion 261 is bent to form the first covering portion 251 .

[0184] One end portion of the first folding portion 261 is bent to form the first covering portion 251 , which is convenient for processing and manufacturing.

[0185] In some embodiments, the first covering portion 251 can be manufactured separately and then connected to the first folding portion 261 .

[0186] In some embodiments, the second covering portion 252 is formed by bending and extending the second folding portion 262 away from the main body 240. That is, a portion of the second folding portion 262 is bent to form the second covering portion 252.

[0187] One end portion of the second folded portion 262 is bent to form the second covering portion 252 , which facilitates processing and manufacturing.

[0188] In some embodiments, the second covering portion 252 can be manufactured separately and then connected to the second folding portion 262 .

[0189] In some embodiments, the first folding portion 261 is extended by bending one end of the main body 240. That is, a portion of the main body 240 is bent to form the first folding portion 261.

[0190] One end portion of the main body 240 is bent to form a first folded portion 261 for ease of processing and manufacturing.

[0191] In some embodiments, the first folded portion 261 can be manufactured separately and then connected to the main body 240 .

[0192] In some embodiments, the second folding portion 262 is extended by being bent from the other end of the main body 240. That is, a portion of the main body 240 is bent to form the second folding portion 262.

[0193] The other end of the main body 240 is bent to form a second folded portion 262 for ease of processing and manufacturing.

[0194] In some embodiments, the second folding portion 262 can be manufactured separately and then connected to the main body 240 .

[0195] In some embodiments, the first folded portion 261 is connected to the main body 240 via an arcuate transition. That is, the connection between the first folded portion 261 and the main body 240 is arc-shaped. The arcuate transition of the first folded portion 261 to the main body 240 can reduce fold damage and improve the insulation performance of the slot insulation paper 23.

[0196] In some embodiments, the second folded portion 262 is connected to the main body 240 via an arcuate transition. That is, the connection between the second folded portion 262 and the main body 240 is arc-shaped. The arcuate transition of the second folded portion 262 to the main body 240 can reduce fold damage and improve the insulation performance of the slot insulation paper 23.

[0197] In some embodiments, the first covering portion 251 and the first folding portion 261 are connected by an arcuate transition, and the connection between the first covering portion 251 and the first folding portion 261 is arc-shaped. The arcuate transition from the first covering portion 251 to the first folding portion 261 can reduce crease damage and improve the insulation performance of the slot insulation paper 23.

[0198] In some embodiments, the second covering portion 252 and the second folding portion 262 are connected by an arc-shaped transition, and the connection between the second covering portion 252 and the second folding portion 262 is arc-shaped. The arc-shaped transition from the second covering portion 252 to the second folding portion 262 can reduce fold damage and improve the insulation performance of the slot insulation paper 23.

[0199] In some embodiments, referring to Figures 7 to 11, the width H1 of the first covering portion 251 can be set to be greater than the width H2 of the second covering portion 252; the width H1 of the first covering portion 251 can also be set to be less than the width H2 of the second covering portion 252; the width H1 of the first covering portion 251 can also be set to be equal to the width H2 of the second covering portion 252. The specific setting can be based on needs and is not limited here.

[0200] In some embodiments, referring to Figures 7 to 11, the angle between the first covering portion 251 and the first folding portion 261 is a, and the angle between the second covering portion 252 and the second folding portion 262 is b. a can be set to be greater than b, or less than b, or equal to b. The specific setting can be based on needs and is not limited here.

[0201] In some embodiments, the relative positions of the first covering portion 251 and the second covering portion 252 with respect to the winding 22 when they are overlapped are adjusted by adjusting the sizes of a and b, and adjusting H1 and H2. The adjustment can be made as needed.

[0202] In some embodiments, referring to Figures 7 to 11 , the angle a between the first covering portion 251 and the first folding portion 261 ranges from 80 degrees to 120 degrees, such as 80 degrees, 90 degrees, 100 degrees, 110 degrees, 120 degrees, etc., so that the first covering portion 251 can be easily moved to the side of the winding 22 near the stator slot 210 and the first covering portion 251 and the second covering portion 252 can be easily overlapped. If the angle a between the first covering portion 251 and the first folding portion 261 is too small, such as less than 80 degrees, the first covering portion 251 can be easily stopped by the side of the winding 22 when the first folding portion 261 moves the first covering portion 251 toward the winding 22. If the angle a between the first covering portion 251 and the first folding portion 261 is too large, such as greater than 120 degrees, the first covering portion 251 and the second covering portion 252 can be too far apart after the first folding portion 261 moves the first covering portion 251 toward the winding 22, making it difficult for the first covering portion 251 and the second covering portion 252 to overlap.

[0203] In some embodiments, referring to Figures 7 to 11 , the angle b between the second covering portion 252 and the second folding portion 262 ranges from 80 degrees to 120 degrees, such as 80 degrees, 90 degrees, 100 degrees, 110 degrees, or 120 degrees, so that the second covering portion 252 can be easily moved to the side of the winding 22 near the stator slot 210 and the second covering portion 252 can be easily overlapped with the first covering portion 251. If the angle b between the second covering portion 252 and the second folding portion 262 is too small, such as less than 80 degrees, the second covering portion 252 can be easily stopped by the side of the winding 22 when the second folding portion 262 moves the second covering portion 252 toward the winding 22. If the angle b between the second covering portion 252 and the second folding portion 262 is too large, such as greater than 120 degrees, the second covering portion 252 can be too far apart from the first covering portion 251 after the second folding portion 262 moves the second covering portion 252 toward the winding 22, making it difficult for the second covering portion 252 to overlap with the first covering portion 251.

[0204] In some embodiments, referring to Figures 7 to 11, the angle m between the main body 240 and the first folded portion 261 ranges from 90 degrees to 150 degrees, such as 90 degrees, 100 degrees, 110 degrees, 120 degrees, 130 degrees, 140 degrees, 150 degrees, etc. When the main body 240 is bent and inserted into the stator slot 210, the winding 22 can be easily installed, and when the winding 22 is pressed into the stator slot 210, it is easy to push the first folded portion 261 into the stator slot 210, thereby reducing the resistance of the side wall of the stator slot 210 to the first folded portion 261, reducing scratches on the first folded portion 261, and improving insulation performance. If the angle m between the main body 240 and the first folded portion 261 is too small, such as less than 90 degrees, the angle between the first folded portion 261 and the slot wall of the stator slot 210 will be too small before the first folded portion 261 enters the stator slot 210, making it difficult for the first folded portion 261 to be inserted into the stator slot 210. This may even cause damage to the first folded portion 261 due to excessive resistance. If the angle m between the main body 240 and the first folded portion 261 is too large, such as greater than 150 degrees, the distance between the first covering portion 251 and the second covering portion 252 will be small after the middle portion of the main body 240 in the width direction is bent and inserted into the stator slot 210, making it inconvenient to install the winding 22.

[0205] In some embodiments, referring to Figures 7 to 11, the angle n between the main body 240 and the second folded portion 262 ranges from 90 degrees to 150 degrees, such as 90 degrees, 100 degrees, 110 degrees, 120 degrees, 130 degrees, 140 degrees, 150 degrees, etc. When the main body 240 is bent and inserted into the stator slot 210, the winding 22 can be easily installed, and when the winding 22 is pressed into the stator slot 210, it is easy to push the second folded portion 262 into the stator slot 210, thereby reducing the resistance of the side wall of the stator slot 210 to the second folded portion 262, reducing scratches on the second folded portion 262, and improving insulation performance. If the angle n between the main body 240 and the second folded portion 262 is too small, such as less than 90 degrees, the angle between the second folded portion 262 and the wall of the stator slot 210 before the second folded portion 262 enters the stator slot 210 is too small, making it difficult for the second folded portion 262 to be inserted into the stator slot 210. This may even damage the second folded portion 262 due to excessive resistance. If the angle n between the main body 240 and the second folded portion 262 is too large, such as greater than 150 degrees, the spacing between the second covering portions 252 will be small after the middle portion of the main body 240 in the width direction is bent and inserted into the stator slot 210, making it inconvenient to install the winding 22.

[0206] Please refer to FIG. 6 and FIG. 12 . The stator 20 in some embodiments of the present application further includes a positioning member 27 for pressing the first covering portion 251 and the second covering portion 252 of the slot insulation paper 23 . The positioning member 27 is installed in the stator slot 210 .

[0207] Positioning members 27 are structural components installed in stator slots 210 to press against the first and second covering portions 251, 252 of the slot insulation paper 23 to maintain their overlap. Positioning members 27 are typically made of non-magnetic and non-conductive materials such as plastic, rubber, and Bakelite. This reduces magnetic flux leakage between stator teeth 211 and eddy current losses.

[0208] After the winding 22 pushes the slot insulation paper 23 into the stator slot 210, the first covering part 251 and the second covering part 252 will not completely overlap on the winding 22. At this time, the positioning part 27 is installed. Through the pressing and fixing of the positioning part 27, the first covering part 251 and the second covering part 252 can be supported on the winding 22 to better wrap the winding 22 and improve the insulation performance.

[0209] A positioning member 27 is provided to press against the first covering portion 251 and the second covering portion 252, thereby positioning the slot insulation paper 23 close to the slot opening of the stator slot 210. This can effectively prevent the first covering portion 251 and the second covering portion 252 from rising relative to the winding 22, thereby better surrounding the winding 22 and improving the insulation performance.

[0210] In some embodiments, the first covering portion 251 and the second covering portion 252 may be bonded together.

[0211] In some embodiments, a slot for engaging the positioning member 27 is provided on the side wall of the stator slot 210 .

[0212] The clamping slot refers to a groove structure provided on the side wall of the stator slot 210 .

[0213] A clamping groove is provided on the side wall of the stator slot 210 to clamp the positioning member 27 , thereby facilitating the installation and fixation of the positioning member 27 .

[0214] In some embodiments, referring to FIG. 13 , the curved segment 243 only includes a first sub-segment 2431 , an arc segment 2433 , and a second sub-segment 2432 , and has a simple structure and is easy to manufacture.

[0215] In some embodiments, referring to FIG14 , the curved section 243 is arc-shaped, which facilitates processing and manufacturing to guide the first section 241 and the second section 242 into the stator slot 210 .

[0216] In some embodiments, referring to Figure 15 , the curved segment 243 includes a plurality of folded line segments connected in sequence. The curved segment 243 is provided with a plurality of folded line segments, and the plurality of folded line segments are connected in sequence to form the curved segment 243 , which can be easily processed and manufactured.

[0217] In some embodiments, referring to FIG. 16 , the main body 240 may be configured to be flat before use to facilitate processing and manufacturing, and may be conveniently stacked during storage to reduce occupied space.

[0218] According to some embodiments of the present application, referring to Figures 6 to 11 , the slot insulation paper 23 provided in the embodiments of the present application includes a first covering portion 251, a first folding portion 261, a main body 240, a second folding portion 262, and a second covering portion 252, which are sequentially connected. The first covering portion 251 is bent and extended from an end of the first folding portion 261 away from the main body 240 toward one side in the thickness direction of the main body 240. The second covering portion 252 is bent and extended from an end of the second folding portion 262 away from the main body 240 toward one side in the thickness direction of the main body 240. The first folding portion 261 is bent and extended from one end of the main body 240 toward the other side in the thickness direction of the main body 240, and the second folding portion 262 is bent and extended from the other end of the main body 240 toward the other side in the thickness direction of the main body 240. The main body 240 includes a first section 241, a second section 242, and a curved section 243. The curved section 243 is curved toward one side in the thickness direction of the main body 240. The first section 241 and the second section 242 are arranged opposite each other. The two ends of the curved section 243 are respectively connected to the first section 241 and the second section 242. The first folding portion 261 is connected to the end of the first section 241 away from the curved section 243, and the second folding portion 262 is connected to the end of the second section 242 away from the curved section 243. During use, after the slot insulation paper 23 is pushed into the stator slot 210 through the winding 22, the winding 22 can be automatically wound, which is convenient and efficient.

[0219] According to some embodiments of the present application, referring to Figures 6 to 11 , the present application also provides a stator 20 including the slot insulation paper 23 described in any of the above embodiments. The provision of the slot insulation paper 23 facilitates assembly of the stator 20.

[0220] In some embodiments, referring to Figures 6 to 11, the stator 20 further includes a stator core 21 and a winding 22. Stator teeth 211 are provided on the side of the stator core 21, and stator slots 210 are formed between adjacent stator teeth 211. Slot insulation paper 23 and the winding 22 are placed in the stator slots 210. The slot insulation paper 23 is wrapped around the winding 22 to ensure good insulation performance between the winding 22 and the slot wall of the stator slot 210.

[0221] According to some embodiments of the present application, an axial motor 100 is further provided, comprising the stator 20 as described in the above embodiment.

[0222] According to some embodiments of the present application, an electric drive assembly 1001 is further provided, comprising the axial motor 100 as described in the above embodiments.

[0223] According to some embodiments of the present application, the embodiments of the present application further provide a driving device, including the axial motor 100 as described in the above embodiment; or including the electric drive assembly 1001 as described in the above embodiment.

[0224] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A slot insulation paper, characterized in that: include: The main body has a middle portion in a width direction of one side that can be bent toward one side in a thickness direction so as to be placed in a stator slot of the stator; A first covering portion is provided at one end of the main body in the width direction and extends toward one side in the thickness direction of the main body; A second covering portion is provided at the other end of the main body in the width direction and extends toward one side in the thickness direction of the main body; A first folding portion is disposed between the main body and the first covering portion and extends toward the other side of the main body in the thickness direction; The second folding portion is disposed between the main body and the second covering portion and extends toward the other side in the thickness direction of the main body.

2. The slot insulation paper according to claim 1, characterized in that: A sum of widths of the first covering portion and the second covering portion is greater than or equal to a width of the stator slot.

3. The slot insulation paper according to claim 1 or 2, characterized in that: The difference between the sum of the widths of the first covering portion and the second covering portion and the width of the stator slot is greater than or equal to 1 mm.

4. The slot insulation paper according to any one of claims 1 to 3, characterized in that: The main body includes a first section, a second section and a bent section, the bent section is bent toward one side in the thickness direction of the main body, the bent section is used to guide the first section and the second section into the stator slot, the first section and the second section are arranged opposite to each other, the two ends of the bent section are respectively connected to the first section and the second section, the first folded portion is connected to an end of the first section away from the bent section, and the second folded portion is connected to an end of the second section away from the bent section.

5. The slot insulation paper according to claim 4, characterized in that: The curved segment is arc-shaped, or the curved segment includes a plurality of broken line segments connected in sequence.

6. The slot insulation paper according to claim 4 or 5, characterized in that: The curved segment includes a first subsegment and a second subsegment arranged obliquely to the first subsegment, the first subsegment is connected to the second subsegment, the first segment is connected to the first subsegment, and the second segment is connected to the second subsegment.

7. The slot insulation paper according to claim 6, characterized in that: The bending section also includes a first guide section and a second guide section, the first guide section connects the first sub-segment and the first section, and the first guide section and the first sub-segment are bent at an obtuse angle; the second guide section connects the second sub-segment and the second section, and the second guide section and the second sub-segment are bent at an obtuse angle.

8. The slot insulation paper according to claim 6 or 7, characterized in that: The first sub-segment and the second sub-segment are connected via an arc segment transition.

9. The slot insulation paper according to any one of claims 1 to 8, characterized in that: The main body is an integrally formed structure.

10. The slot insulation paper according to any one of claims 1 to 9, characterized in that: The slot insulation paper is an integrally formed structure.

11. The slot insulation paper according to claim 10, characterized in that: The first covering portion is bent and extended from one end of the first folding portion away from the main body; And / or, the second covering portion is extended by bending from one end of the second folding portion away from the main body; And / or, the first folding portion is bent and extended from one end of the main body; And / or, the second folding portion is bent and extended from the other end of the main body.

12. The slot insulation paper according to claim 10 or 11, characterized in that: The first folding portion is connected to the main body via an arc transition; And / or, the second folded portion is connected to the main body via an arc-shaped transition; And / or, the first covering portion and the first folding portion are connected via an arc-shaped transition; And / or, the second covering portion is connected to the second folding portion via an arc-shaped transition.

13. A stator, characterized in that: The invention comprises the slot insulation paper as claimed in any one of claims 1 to 12.

14. The stator according to claim 13, characterized in that: It also includes a stator core and a winding, wherein the stator core is provided with a plurality of stator teeth, stator slots are formed between adjacent stator teeth, the winding is installed in the stator slots, the slot insulation paper is placed in the stator slots, and the slot insulation paper is arranged around the winding.

15. The stator according to claim 14, characterized in that: It also includes a positioning member for pressing the first covering portion and the second covering portion of the slot insulation paper, and the positioning member is installed in the stator slot.

16. The stator according to claim 15, characterized in that: A clamping groove for clamping the positioning member is provided on the side wall of the stator slot.

17. An axial motor, characterized in that: Comprising a stator as claimed in any one of claims 13 to 16.

18. An electric drive assembly, characterized in that: Comprising the axial motor as claimed in claim 17.

19. A driving device, characterized in that: Includes the axial motor as claimed in claim 17; or includes the electric drive assembly as claimed in claim 18.

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