Motor, electric driving device, electric driving system and electric equipment

Abstract

The utility model provides a motor, an electric driving device, an electric driving system and electric equipment, the motor comprises a shell, a stator and a rotor, the shell is provided with a containing cavity, the stator is contained in the containing cavity, the stator comprises a stator body, a first liquid collecting ring and a second liquid collecting ring, the first liquid collecting ring is arranged on the peripheral side of the second liquid collecting ring in a sleeving mode and is in sealing connection with the second liquid collecting ring, and the rotor is arranged in the containing cavity. The stator comprises a stator main body and a rotating shaft, so that a stator cavity separated from the inner ring space of the second liquid collecting ring is defined, the stator cavity is used for accommodating a cooling medium, and at least part of the stator main body is accommodated in the stator cavity, so that at least part of the stator main body is soaked in the cooling medium; and the rotor main body is accommodated in the inner ring space of the second liquid collecting ring and is coaxially connected with the rotating shaft. According to the motor provided by the embodiment of the invention, the cooling medium can be in direct contact with the stator main body, and the rotor main body can be isolated from the cooling medium, so that the working performance of the motor is effectively improved.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a motor, an electric drive device, an electric drive system and an electric device. Background Art

[0002] With increasing environmental pollution, new energy products are gaining popularity. Electric drive systems, as the power source for these new energy products, convert battery-generated electrical energy into mechanical energy to power these products. Improving the performance of motors, the core components of electric drive systems, is a pressing technical challenge in electric drive technology. Utility Model Content

[0003] The purpose of the embodiments of the present application is to provide a motor, an electric drive device, an electric drive system and an electric device to solve the technical problem of poor working performance of the motor in the related art.

[0004] To achieve the above-mentioned purpose, the technical solution adopted in the embodiment of the present application is to provide a motor, comprising:

[0005] a housing having a cavity;

[0006] a stator accommodated in the cavity, the stator comprising a stator body, a first collector ring, and a second collector ring, the first collector ring being sleeved on an outer circumference of the second collector ring and sealingly connected to the second collector ring to define a stator cavity separated from an inner ring space of the second collector ring, the stator cavity being used to accommodate a cooling medium, at least a portion of the stator body being accommodated in the stator cavity so that at least a portion of the stator body is immersed in the cooling medium;

[0007] The rotor comprises a rotor body and a rotating shaft. The rotor body is accommodated in the inner ring space of the second collecting ring and is coaxially connected to the rotating shaft.

[0008] The motor provided by the embodiment of the present application has at least the following beneficial effects: the motor provided by the embodiment of the present application defines a stator cavity by sleeve-mounting the first liquid collecting ring on the outer peripheral side of the second liquid collecting ring and sealingly connecting it to the second liquid collecting ring, and at least partially accommodating the stator body in the stator cavity, so that at least partially the stator body is immersed in the cooling medium, so that the cooling medium can be in direct contact with the stator body, effectively absorbing the heat generated by the stator body, thereby effectively improving the cooling efficiency of the motor; in addition, by accommodating the rotor body in the inner ring space of the second liquid collecting ring, since the stator cavity and the inner ring space of the second liquid collecting ring are separated, the rotor body can be isolated from the cooling medium, effectively reducing the oil stirring loss of the rotor, thereby effectively improving the working efficiency of the motor, and further effectively improving the working performance of the motor.

[0009] In some embodiments of the present application, the stator cavity includes a first cavity and a second cavity, the first liquid collecting ring includes a first annular portion and a second annular portion, the first annular portion and the second annular portion are arranged at opposite ends of the stator body and are both sealed and connected to the second liquid collecting ring, the first annular portion, one end of the stator body and one end of the second liquid collecting ring are combined to form a first cavity, the second annular portion, the other end of the stator body and the other end of the second liquid collecting ring are combined to form a second cavity, and the stator body is provided with a connecting flow channel, which connects the first cavity and the second cavity.

[0010] By adopting the above technical solution, the cooling medium can not only directly contact the two ends of the stator body, but also flow through the connecting flow channel to directly contact the interior of the stator body, more effectively absorbing the heat generated by the stator body, further improving the cooling efficiency of the motor, and thus further improving the working performance of the motor.

[0011] In some embodiments of the present application, the first annular portion is sealed and connected to the housing, and the second annular portion is sealed and connected to the housing.

[0012] By adopting the above technical solution, the stator cavity is effectively isolated from the inner ring space of the second liquid collecting ring, thereby effectively improving the situation of cooling medium leaking from the stator cavity to the inner ring space of the second liquid collecting ring, further reducing the oil stirring loss of the rotor, further improving the working efficiency of the motor, and thus further improving the working performance of the motor.

[0013] In some embodiments of the present application, the motor further includes a first seal, which is disposed between the first annular portion and the outer shell to seal the first annular portion and the outer shell; and / or, the motor further includes a second seal, which is disposed between the second annular portion and the outer shell to seal the second annular portion and the outer shell.

[0014] By adopting the above technical solution, not only the first annular portion and the outer shell are conveniently sealed and connected, but also the second annular portion and the outer shell are conveniently sealed and connected.

[0015] In some embodiments of the present application, the stator body is fixedly connected to the housing.

[0016] By adopting the above technical solution, the stator body is effectively fixed, thereby effectively improving the structural stability of the motor and further enhancing the working performance of the motor.

[0017] In some embodiments of the present application, the outer circumferential wall of the stator body is interference-connected with the inner circumferential wall of the housing.

[0018] By adopting the above technical solution, it is convenient to fix the stator body and the shell together.

[0019] In some embodiments of the present application, the stator further includes a first connecting member and a second connecting member, the first connecting member being connected between the first annular portion and the stator body, and the second connecting member being connected between the second annular portion and the stator body.

[0020] By adopting the above technical solution, it is convenient to connect the first liquid collecting member with the stator body, effectively improving the structural stability of the stator, thereby further improving the working performance of the motor.

[0021] In some embodiments of the present application, one end of the first connecting member is embedded in the wall of the first annular portion, and the other end of the first connecting member is connected to the stator body; and / or, one end of the second connecting member is embedded in the wall of the second annular portion, and the other end of the second connecting member is connected to the stator body.

[0022] By adopting the above technical solution, the connection strength between the first connecting member and the first annular portion and the connection strength between the second connecting member and the second annular portion are effectively improved.

[0023] In some embodiments of the present application, the first connecting member is a metal member; and / or the second connecting member is a metal member.

[0024] By adopting the above technical solution, the connection strength between the first annular portion and the stator body and the connection strength between the second annular portion and the stator body are effectively improved.

[0025] In some embodiments of the present application, the first liquid collecting ring is provided with a first lead-out hole, and the motor further includes a lead-out wire, one end of the lead-out wire is electrically connected to the stator body, and the other end of the lead-out wire passes through the first lead-out hole and extends to the outside of the stator cavity, and the lead-out wire is sealedly connected to the hole wall of the first lead-out hole.

[0026] By adopting the above technical solution, the situation where the cooling medium leaks from the stator cavity through the first outlet hole to the inner ring space of the second collecting ring is effectively improved, the oil stirring loss of the rotor is further reduced, the working efficiency of the motor is further improved, and the working performance of the motor is further improved.

[0027] In some embodiments of the present application, the motor further includes a third seal, which is disposed between the lead wire and the hole wall of the first lead hole to seal the connection between the lead wire and the hole wall of the first lead hole.

[0028] By adopting the above technical solution, it is convenient to seal and connect the lead wire with the hole wall of the first lead hole.

[0029] In some embodiments of the present application, the first liquid collecting ring is provided with a second outlet hole, and the motor further includes a temperature detection element for detecting the temperature of the stator body, the temperature detection element extends to the outside of the stator cavity through the second outlet hole, and the temperature detection element is sealed with the hole wall of the second outlet hole.

[0030] By adopting the above technical solution, the situation where the cooling medium leaks from the stator cavity through the second outlet hole to the inner ring space of the second collecting ring is effectively improved, the oil stirring loss of the rotor is further reduced, the working efficiency of the motor is further improved, and the working performance of the motor is further improved.

[0031] In some embodiments of the present application, the motor further includes a fourth seal, which is disposed between the temperature detection element and the hole wall of the second outlet hole to seal the temperature detection element and the hole wall of the second outlet hole.

[0032] By adopting the above technical solution, it is convenient to seal and connect the temperature detection element and the hole wall of the second lead-out hole.

[0033] In some embodiments of the present application, the second liquid collecting ring includes a main body with an annular structure and a slot wedge connected to the outer peripheral wall of the main body. The rotor main body is accommodated in the inner ring space of the main body. The stator main body includes a first iron core and a winding. The first iron core is provided with a winding groove, and the winding is wound in the winding groove. The first iron core is sleeved on the main body, and the slot wedge is inserted into the notch of the winding groove to seal the winding groove.

[0034] By adopting the above technical solution, during the assembly of the stator body and the second collecting ring, the slot wedge is inserted into the notch of the winding slot, which effectively simplifies the assembly process of the stator and effectively improves the assembly efficiency of the motor.

[0035] In some embodiments of the present application, the second liquid collecting ring is a heat conducting member.

[0036] By adopting the above technical solution, the heat generated by the rotor can be transferred to the cooling medium in the stator cavity through the second collecting ring, further improving the cooling efficiency of the motor and thus further improving the working performance of the motor.

[0037] In some embodiments of the present application, a cooling channel is opened inside the rotating shaft, and the stator cavity is connected to the cooling channel through an external pipeline.

[0038] By adopting the above technical solution, the cooling medium can flow from the stator cavity through the external pipeline into the cooling channel to absorb the heat generated by the stator and the heat generated by the rotor in turn. In this way, not only the stator is cooled, but also the rotor is effectively cooled without the rotor body being immersed in the cooling medium, further improving the cooling efficiency and working efficiency of the motor, thereby further improving the working performance of the motor.

[0039] An embodiment of the present application further provides an electric drive device, comprising the motor described in any one of the above embodiments.

[0040] The electric drive device provided by the embodiments of the present application has at least the following beneficial effects: the electric drive device provided by the embodiments of the present application effectively improves the working performance of the electric drive device because it adopts the motor described in any of the above embodiments.

[0041] An embodiment of the present application further provides an electric drive system, comprising a battery and the above-mentioned electric drive device, wherein the battery is electrically connected to the motor.

[0042] The electric drive system provided by the embodiment of the present application has at least the following beneficial effects: the electric drive system provided by the embodiment of the present application effectively improves the working performance of the electric drive system due to the adoption of the above-mentioned electric drive device.

[0043] An embodiment of the present application further provides an electric device, comprising the above-mentioned electric drive device or the above-mentioned electric drive system.

[0044] The electric device provided by the embodiment of the present application has at least the following beneficial effects: the electric device provided by the embodiment of the present application effectively improves the working performance of the electric device due to the adoption of the above-mentioned electric drive device or the above-mentioned electric drive system. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] 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 descriptions of the prior art. 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.

[0046] Figure 1 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application;

[0047] Figure 2 A schematic diagram of the explosion structure of a battery provided in an embodiment of the present application;

[0048] Figure 3 A schematic diagram of the structure of the electric drive device provided in an embodiment of the present application;

[0049] Figure 4 A schematic diagram of the structure of a motor provided in an embodiment of the present application;

[0050] Figure 5 for Figure 4 The exploded structural diagram of the motor shown;

[0051] Figure 6 for Figure 4 The main structural diagram of the motor shown;

[0052] Figure 7 for Figure 6The cross-sectional structural diagram of the motor shown is along the AA line;

[0053] Figure 8 for Figure 6 The cross-sectional structure diagram of the motor shown is along line BB;

[0054] Figure 9 This is a schematic structural diagram of the second liquid collecting ring in the motor provided in an embodiment of the present application.

[0055] Among them, the reference numerals in the figures are:

[0056] 1. Electric drive device;

[0057] 10. Motor; 11. Housing; 111. Cavity; 112. First outlet; 12. Stator; 121. Stator body; 1211. First core; 1212. Winding; 122. First collector ring; 1221. First annular portion; 1222. Second annular portion; 1223. Stator cavity; 12231. First cavity; 12232. Second cavity; 1224. First outlet; 1225. Second outlet; 1226. Second outlet; 123, second liquid collecting ring; 1231, main body; 1232, slot wedge; 124, first connecting member; 125, second connecting member; 13, rotor; 131, rotor body; 132, rotating shaft; 1321, cooling channel; 14, first seal; 15, second seal; 16, lead wire; 17, third seal; 18, temperature detection element; 19, fourth seal; 20, controller; 30, speed change mechanism;

[0058] 2. Battery;

[0059] 21. Box body; 211. First part; 212. Second part;

[0060] 22. Battery cells;

[0061] 3. Vehicle body. DETAILED DESCRIPTION

[0062] 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.

[0063] It should be noted that when an element is referred to as being “fixed on” 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.

[0064] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", 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 this 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 this application.

[0065] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature specified as "first," "second," "third," or "fourth" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0066] An electric motor is the power unit of an electric device, converting electrical energy into mechanical energy to drive the device. A motor typically consists of a stator, a rotor, and a shaft, with the rotor coaxially connected to the shaft. During motor operation, current flows through the stator windings, generating a rotating magnetic field. This magnetic field causes the rotor to rotate, driving the shaft. During this process, the current flowing through the stator windings heats them. Therefore, to prevent overheating and damage to the motor, the stator is typically cooled.

[0067] In related art, at least a portion of the stator is immersed in a cooling medium to cool the stator. However, since the cooling medium flows into the space where the rotor is located, the rotor and the cooling medium come into direct contact with each other, increasing the rotor's rotational resistance and oil churning losses. This reduces the motor's operating efficiency and hinders its performance.

[0068] In order to improve the working performance of the motor, the motor provided in the embodiment of the present application defines a stator cavity by sleeve-mounting the first liquid collecting ring on the outer peripheral side of the second liquid collecting ring and sealingly connecting it to the second liquid collecting ring, and accommodating at least part of the stator body in the stator cavity, so that at least part of the stator body is immersed in the cooling medium, so that the cooling medium can be in direct contact with the stator body, effectively absorbing the heat generated by the stator body, thereby effectively improving the cooling efficiency of the motor. In addition, by accommodating the rotor body in the inner ring space of the second liquid collecting ring, since the stator cavity and the inner ring space of the second liquid collecting ring are separated, the rotor body can be isolated from the cooling medium, effectively reducing the oil stirring loss of the rotor, thereby effectively improving the working efficiency of the motor, and further effectively improving the working performance of the motor.

[0069] The technical solutions described in the embodiments of the present application are applicable to electric drive devices using motors and electric devices using electric drive devices. The electric devices may include, but are not limited to, vehicles, ships, spacecraft, and electric toys. Vehicles may be fuel-powered vehicles, gas-powered vehicles, or new energy vehicles. New energy vehicles may be pure electric vehicles, hybrid vehicles, or extended-range vehicles. Spacecraft include aircraft, rockets, space shuttles, and spacecraft. Electric toys include fixed or mobile electric toys, such as electric car toys, electric ship toys, and electric airplane toys.

[0070] For the convenience of description, the following embodiments are described by taking the electric device of one embodiment of the present application as a vehicle as an example.

[0071] See also Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle provided in an embodiment of the present application. The vehicle includes a body 3, a battery 2, and an electric drive unit 1. The body 3 is the main supporting component of the vehicle and has an engine compartment and a passenger compartment. The engine compartment is used to accommodate the electric drive unit 1, and the passenger compartment is used to provide operating and seating space for the driver and passengers. When the vehicle is a front-wheel drive vehicle, the engine compartment is located at the front of the body 3, that is, the engine compartment is the front engine compartment. When the vehicle is a rear-wheel drive vehicle, the engine compartment is located at the rear of the body 3, that is, the engine compartment is the rear engine compartment. When the vehicle is a four-wheel drive vehicle, the engine compartment is divided into a front engine compartment and a rear engine compartment, with the front engine compartment located at the front of the body 3 and the rear engine compartment located at the rear of the body 3. The number of electric drive units 1 can be two, with two electric drive units 1 located in the front and rear engine compartments respectively. The battery 2 and the electric drive unit 1 together constitute the vehicle's electric drive system. The battery 2 can be located at the bottom, front, or rear of the vehicle and can be used to power the electric drive unit 1 to drive its operation. The electric drive device 1 is used to convert the electrical energy provided by the battery 2 into mechanical energy and output the mechanical energy to the wheels of the vehicle to drive the vehicle.

[0072] See also Figure 2 , Figure 2This is an exploded diagram of a battery 2 provided in an embodiment of the present application. The battery 2 includes a housing 21 and a battery cell 22, with the battery cell 22 being housed within the housing 21. The housing 21 is used to provide a storage space for the battery cell 22, and the housing 21 can have a variety of structures. In some embodiments, the housing 21 can include a first portion 211 and a second portion 212, which cover each other and together define a storage space for the battery cell 22. The second portion 212 can be a hollow structure with one end open, and the first portion 211 can be a plate-like structure. The first portion 211 covers the open side of the second portion 212, so that the first portion 211 and the second portion 212 together define a storage space. The first portion 211 and the second portion 212 can also be hollow structures with one end open, with the open side of the first portion 211 covering the open side of the second portion 212, so that the first portion 211 and the second portion 212 together define a storage space. Of course, the box body 21 formed by the first part 211 and the second part 212 can be in various shapes, such as a cylinder, a cuboid, etc., which is not specifically limited here.

[0073] In some embodiments, the box 21 can be used as a part of the chassis structure of the vehicle. For example, part of the box 21 can become at least a part of the floor of the vehicle, or part of the box 21 can become at least a part of the crossbeam and longitudinal beam of the vehicle.

[0074] Of course, in some embodiments, the battery 2 may not include the box body 21 , but rather a plurality of battery cells 22 may be electrically connected and formed into a whole through necessary fixing structures before being assembled into a vehicle.

[0075] The battery 2 may include multiple battery cells 22, which may be connected in series, in parallel, or in a hybrid configuration. A hybrid configuration refers to a combination of series and parallel connections within the battery cells 22. The battery cells 22 may be directly connected in series, in parallel, or in a hybrid configuration, and the entire battery cell 22 may then be housed within the housing 21. Alternatively, the battery 2 may include multiple battery cells 22 connected in series, in parallel, or in a hybrid configuration to form a battery module, which is then further connected in series, in parallel, or in a hybrid configuration to form a single unit housed within the housing 21. The battery 2 may also include other functional components, such as a busbar for electrically connecting the multiple battery cells 22.

[0076] Each battery cell 22 may be a secondary battery cell or a primary battery cell. A secondary battery cell refers to a battery cell 22 that can be recharged to activate the active material after the battery cell 22 is discharged and can continue to be used. A primary battery cell refers to a battery cell 22 that cannot be recharged to activate the active material after the battery cell 22 has exhausted its electrical energy and can continue to be used. The battery cell 22 may also be a lithium-ion battery cell, a sodium-ion battery cell, a sodium-lithium-ion battery cell, a lithium metal battery cell, a sodium metal battery cell, a lithium-sulfur battery cell, a magnesium-ion battery cell, a nickel-hydrogen battery cell, a nickel-cadmium battery cell, a lead-acid battery cell, etc., but is not limited thereto. The battery cell 22 may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell, or a battery cell 22 of another shape. Prismatic battery cells include square-shell battery cells, blade-shaped battery cells, and polygonal prismatic battery cells. Polygonal prismatic battery cells, for example, hexagonal prismatic battery cells, are not particularly limited in this application.

[0077] See also Figure 3 , Figure 3 Schematic diagram of the structure of the electric drive device 1 provided in an embodiment of the present application. The electric drive device 1 includes a motor 10, which is used to convert the electrical energy provided by the battery 2 into mechanical energy. In some embodiments, the motor 10 can be a radial flux motor 10. In some embodiments, the number of motors 10 is two, and the two motors 10 are coaxially arranged, that is, the central axes of the two motors 10 coincide, and the "central axis" of the motor 10 refers to the axial centerline of the rotating shaft 132 (or "rotor shaft") of the motor 10. As an example, the rotating shaft 132 of one motor 10 is connected to one of the left front wheel and the right front wheel of the vehicle, and the rotating shaft 132 of the other motor 10 is connected to the other of the left front wheel and the right front wheel of the vehicle, or the rotating shaft 132 of one motor 10 is connected to one of the left rear wheel and the right rear wheel of the vehicle, and the rotating shaft 132 of the other motor 10 is connected to the other of the left rear wheel and the right rear wheel of the vehicle. During the operation of the electric drive device 1, the rotation speeds of the two motors 10 can be the same, or the rotation speeds of the two motors 10 can be different.

[0078] Of course, in other embodiments, the number of motor 10 may also be one.

[0079] In some embodiments, the electric drive device 1 may further include a controller 20. The controller 20 is configured to convert the direct current output by the battery 2 into alternating current and transmit the alternating current to the motor 10. The controller 20 may also be configured to control the operation of the motor 10. For example, the controller 20 is configured to control the start / stop, speed, torque, etc. of the motor 10. In other words, the motor 10 and the battery 2 are both electrically connected to the controller 20. The direct current output by the battery 2 may be transmitted to the controller 20 via a current transmission path between the battery 2 and the controller 20. After the controller 20 converts the direct current into alternating current, the alternating current may be transmitted to the motor 10 via a current transmission path between the controller 20 and the motor 10 to drive the motor 10 to operate. At the same time, control signals from the controller 20 may be transmitted to the motor 10 via the current transmission path between the controller 20 and the motor 10. An operating status signal of the motor 10 may also be transmitted to the controller 20 via the current transmission path between the controller 20 and the motor 10, enabling the controller 20 to control the operation of the motor 10.

[0080] In some embodiments, the electric drive device 1 may further include a speed change mechanism 30, which is used to transmit the mechanical energy to the vehicle's wheels by changing the speed and torque of the motor 10. For example, the speed change mechanism 30 transmits the mechanical energy to the vehicle's wheels by reducing the speed of the motor 10 and increasing the torque of the motor 10. In another example, the speed change mechanism 30 transmits the mechanical energy to the vehicle's wheels by increasing the speed of the motor 10 and reducing the torque of the motor 10. The speed change mechanism 30 may be, but is not limited to, a pinion speed change mechanism, a worm speed change mechanism, a planetary gear speed change mechanism, a continuously variable speed change mechanism, or the like.

[0081] In order to illustrate the technical solution provided by this application, a detailed description is given below with reference to specific drawings and embodiments.

[0082] First, please refer to Figures 4 to 8 An embodiment of the present application provides a motor 10, comprising a housing 11, a stator 12, and a rotor 13. The housing 11 has a cavity 111. The stator 12 is accommodated in the cavity 111. The stator 12 comprises a stator body 121, a first liquid collecting ring 122, and a second liquid collecting ring 123. The first liquid collecting ring 122 is sleeved on the outer circumference of the second liquid collecting ring 123 and is sealedly connected to the second liquid collecting ring 123 to define a stator cavity 1223 separated from the inner ring space of the second liquid collecting ring 123. The stator cavity 1223 is used to accommodate a cooling medium. At least a portion of the stator body 121 is accommodated in the stator cavity 1223 so that at least a portion of the stator body 121 is immersed in the cooling medium. The rotor 13 comprises a rotor body 131 and a rotating shaft 132. The rotor body 131 is accommodated in the inner ring space of the second liquid collecting ring 123 and is coaxially connected to the rotating shaft 132.

[0083] The housing 11 is a component that provides an installation environment for the stator 12 and rotor 13 (i.e., the aforementioned cavity 111). The housing 11 can be a one-piece component or an assembled component composed of multiple parts. In some embodiments, the housing 11 includes a shell and an end cap. The shell can be a hollow structure with one end open, and the end cap can be a plate-like structure that covers the open side of the shell, so that the shell and end cap together define the aforementioned installation environment. The material of the housing 11 can be, but is not limited to, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0084] The stator 12 is the fixed portion of the motor 10 and is used to drive the rotor 13 to rotate. The stator body 121 is the main portion of the stator 12 and is used to generate a rotating magnetic field to drive the rotor 13 to rotate. In some embodiments, the stator body 121 may include a first core 1211 and a winding 1212, which is wound around the first core 1211. For example, the first core 1211 has winding slots, and the winding 1212 is wound within the winding slots.

[0085] The rotor 13 is the rotating part of the motor 10. The rotor body 131 is the main portion of the rotor 13, and is capable of rotating under the influence of the rotating magnetic field. In some embodiments, the rotor body 131 may include a second core and permanent magnets, with the permanent magnets mounted on the second core. For example, the second core may have mounting slots in which the permanent magnets are mounted. There may be multiple permanent magnets, each arranged around the central axis of the rotating shaft 132. Accordingly, there may also be multiple mounting slots, with each permanent magnet corresponding to each mounting slot. The rotating shaft 132 is a component for outputting the mechanical energy generated by the rotation of the rotor body 131. The coaxial connection between the rotating shaft 132 and the rotor body 131 means that the central axis of the rotating shaft 132 is parallel to and coincides with the central axis of the rotor body 131, and the second core is fixedly connected to the rotating shaft 132. The second core and the rotating shaft 132 may be integrally formed components, for example, formed integrally using a casting process. The second core and the rotating shaft 132 can also be independently formed and then connected to form a whole. For example, the second core and the rotating shaft 132 can be independently formed using a casting process and then welded to form a whole. It can be understood that the first core 1211, the second core, and the rotating shaft 132 are coaxially arranged, that is, the central axis of the first core 1211, the central axis of the second core, and the central axis of the rotating shaft 132 are parallel to each other and coincide with each other.

[0086] During the operation of the motor 10, current can be input into the winding 1212 to generate a rotating magnetic field. The first iron core 1211 is used to conduct the rotating magnetic field so that the rotating magnetic field interacts with the magnetic field generated by the permanent magnet, thereby driving the rotor 13 to rotate.

[0087] In some embodiments, the motor 10 may further include a bearing, which is mounted on the housing 11 and sleeved on the shaft 132. As an example, there may be two bearings, which are disposed at opposite ends of the shaft 132.

[0088] Both the first and second liquid collecting rings 122 and 123 have an annular structure. The first liquid collecting ring 122 is sleeved around the outer periphery of the second liquid collecting ring 123 and is sealed therewith, defining a stator cavity 1223. At least a portion of the stator body 121 is housed within the stator cavity 1223. The second liquid collecting ring 123 is sleeved around the rotor 13, meaning that the rotor 13 is disposed within the inner annular space of the second liquid collecting ring 123. The stator cavity 1223 is separated from the inner annular space of the second liquid collecting ring 123. Therefore, without concern for assembly defects, the cooling medium in the stator cavity 1223 cannot flow directly from the stator cavity 1223 into the inner annular space of the second liquid collecting ring 123. The first and second liquid collecting rings 122 and 123 may be integrally molded components. For example, they may be integrally molded using an injection molding process to achieve a sealed connection between the first and second liquid collecting rings 122 and 123. The first and second liquid collecting rings 122, 123 can also be formed separately and then connected to form a whole. The connection method of the first and second liquid collecting rings 122, 123 can be, but is not limited to, welding, bonding, etc., to achieve a sealed connection between the first and second liquid collecting rings 122, 123. The material of the first and second liquid collecting rings 122, 123 can be, but is not limited to, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0089] In some embodiments, the shell 11 is opened at the first outlet 112, and the first liquid collecting ring 122 is opened at the second outlet 1226 arranged opposite to the first outlet 112. The second outlet 1226 is connected to the stator cavity 1223, and the cooling medium can flow out from the stator cavity 1223 through the second outlet 1226 and the first outlet 112 in sequence to the outside of the motor 10.

[0090] The cooling medium is used to absorb the heat generated by the stator body 121. The cooling medium can be statically contained within the stator cavity 1223, or it can circulate into the stator cavity 1223. Alternatively, the cooling medium can be, but is not limited to, cooling oil, cooling water, or the like, and is not specifically limited here.

[0091] The motor 10 provided in the embodiment of the present application defines a stator cavity 1223 by sleeve-mounting the first liquid collecting ring 122 on the outer peripheral side of the second liquid collecting ring 123 and sealingly connecting the second liquid collecting ring 123, and at least partially accommodating the stator body 121 in the stator cavity 1223, so that at least partially the stator body 121 is immersed in the cooling medium, so that the cooling medium can be in direct contact with the stator body 121, effectively absorbing the heat generated by the stator body 121, thereby effectively improving the cooling efficiency of the motor 10. In addition, by accommodating the rotor body 131 in the inner ring space of the second liquid collecting ring 123, since the stator cavity 1223 and the inner ring space of the second liquid collecting ring 123 are separated, the rotor body 131 can be isolated from the cooling medium, effectively reducing the oil stirring loss of the rotor 13, thereby effectively improving the working efficiency of the motor 10, and further effectively improving the working performance of the motor 10.

[0092] In some embodiments of this application, please refer to Figure 7 and Figure 8 The stator cavity 1223 includes a first cavity 12231 and a second cavity 12232. The first liquid collecting ring 122 includes a first annular portion 1221 and a second annular portion 1222. The first annular portion 1221 and the second annular portion 1222 are respectively arranged at opposite ends of the stator body 121 and are both sealed with the second liquid collecting ring 123. The first annular portion 1221, one end of the stator body 121 and one end of the second liquid collecting ring 123 together form a first cavity 12231. The second annular portion 1222, the other end of the stator body 121 and the other end of the second liquid collecting ring 123 together form a second cavity 12232. The stator body 121 is provided with a connecting flow channel, which connects the first cavity 12231 and the second cavity 12232.

[0093] In some embodiments, the first annular portion 1221 may include a first annular wall and a first cover plate. The first annular wall is sleeved over the second liquid collecting ring 123 and spaced apart from the second liquid collecting ring 123. The first cover plate is disposed between the end of the first annular wall facing away from the stator body 121 and the second liquid collecting ring 123, and the first cover plate is sealingly connected between the first annular wall and the second liquid collecting ring 123. The first annular wall, the first cover plate, the end of the second liquid collecting ring 123 adjacent to the first annular portion 1221, and the end surface of the stator body 121 facing the first annular portion 1221 collectively form a first cavity 12231. As an example, the first annular wall and the first cover plate may be integrally molded components, for example, integrally molded using an injection molding process. As an example, the first annular wall and the first cover plate may be separately molded and then connected to form a single unit. The connection method between the first annular wall and the first cover plate may be, but is not limited to, welding, bonding, etc.

[0094] In some embodiments, the second annular portion 1222 may include a second annular wall and a second cover plate. The second annular wall is sleeved over the second liquid collecting ring 123 and spaced apart from the second liquid collecting ring 123. The second cover plate is disposed between the end of the second annular wall facing away from the stator body 121 and the second liquid collecting ring 123. The first cover plate is sealingly connected between the second annular wall and the second liquid collecting ring 123. The second annular wall, the second cover plate, the end of the second liquid collecting ring 123 adjacent to the second annular portion 1222, and the end surface of the stator body 121 facing the second annular portion 1222 collectively form the second cavity 12232. As an example, the second annular wall and the second cover plate may be integrally molded components, for example, integrally molded using an injection molding process. As an example, the second annular wall and the second cover plate may be separately molded and then connected to form a single unit. The connection method between the second annular wall and the second cover plate may be, but is not limited to, welding, bonding, etc.

[0095] In some embodiments, when the stator body 121 includes a first iron core 1211 and a winding 1212, the opposite ends of the winding 1212 protrude from the first iron core 1211, so that one end of the winding 1212 extends into the first cavity 12231 and the other end of the winding 1212 extends into the second cavity 12232, thereby cooling the winding 1212.

[0096] The communication channel is used to connect the first cavity 12231 and the second cavity 12232. In some embodiments, the communication channel is provided within the first core 1211 and extends through opposite end surfaces of the first core 1211 along the axis of the stator 12. As an example, the communication channel can extend in a straight line, that is, the communication channel is parallel to the axis of the stator 12 and extends through opposite end surfaces of the first core 1211. As an example, the communication channel can also extend in a curved manner.

[0097] When the first collecting ring 122 is provided with a second outlet 1226, the second outlet 1226 can be opened on the second annular portion 1222, that is, the second outlet 1226 is directly connected to the second cavity 12232, and the cooling medium can flow from the first cavity 12231 into the second cavity 12232 through the connecting channel, and then the cooling medium can flow out from the second cavity 12232 through the second outlet 1226 and the first outlet 112 in sequence to the outside of the motor 10. The second outlet 1226 can also be opened on the first annular portion 1221, that is, the second outlet 1226 is directly connected to the first cavity 12231, and the cooling medium can flow from the second cavity 12232 into the first cavity 12231 through the connecting channel, and then the cooling medium can flow out from the first cavity 12231 through the second outlet 1226 and the first outlet 112 in sequence to the outside of the motor 10.

[0098] By adopting the above technical solution, the cooling medium can not only directly contact the two ends of the stator body 121, but also flow through the connecting flow channel to directly contact the interior of the stator body 121, so as to more effectively absorb the heat generated by the stator body 121, further improve the cooling efficiency of the motor 10, and thus further improve the working performance of the motor 10.

[0099] In some embodiments of this application, please refer to Figure 7 and Figure 8 The first annular portion 1221 is sealed and connected to the outer shell 11 , and the second annular portion 1222 is sealed and connected to the outer shell 11 .

[0100] The sealed connection between the first annular portion 1221 and the housing 11 means that a sealing structure is provided between the first annular portion 1221 and the housing 11 to seal the gap between the first annular portion 1221 and the housing 11. The sealing structure may be provided between the outer circumference of the first annular portion 1221 and the inner circumferential wall of the housing 11, or between the end surface of the first annular portion 1221 facing away from the stator body 121 and the inner end surface of the housing 11 facing the first annular portion 1221.

[0101] The sealed connection between the second annular portion 1222 and the housing 11 means that a sealing structure is provided between the second annular portion 1222 and the housing 11 to seal the gap between the second annular portion 1222 and the housing 11. The sealing structure may be provided between the outer circumference of the second annular portion 1222 and the inner circumferential wall of the housing 11, or between the end surface of the second annular portion 1222 facing away from the stator body 121 and the inner end surface of the housing 11 facing the second annular portion 1222.

[0102] By adopting the above technical solution, the stator cavity 1223 is effectively isolated from the inner ring space of the second liquid collecting ring 123, thereby effectively improving the situation where the cooling medium leaks from the stator cavity 1223 to the inner ring space of the second liquid collecting ring 123, further reducing the oil stirring loss of the rotor 13, further improving the working efficiency of the motor 10, and further improving the working performance of the motor 10.

[0103] In some embodiments of this application, please refer to Figure 7 and Figure 8 The motor 10 further includes a first seal 14 , which is disposed between the first annular portion 1221 and the housing 11 to seal and connect the first annular portion 1221 and the housing 11 .

[0104] The first sealing member 14 is a component for sealing the gap between the first annular portion 1221 and the housing 11. The first sealing member 14 can be made of a flexible material, which can be, but is not limited to, rubber, silicone, and the like.

[0105] In some embodiments, the first seal 14 is annular and disposed around the axis of the stator 12. As an example, the first seal 14 is disposed between the outer circumference of the first annular portion 1221 and the inner circumferential wall of the housing 11. As an example, the first seal 14 is disposed between the end surface of the first annular portion 1221 facing away from the stator body 121 and the inner end surface of the housing 11 facing the first annular portion 1221.

[0106] In some embodiments, the first annular portion 1221 defines a first limiting groove, and the first sealing member 14 is disposed in the first limiting groove to limit the relative position of the first sealing member 14 and the first annular portion 1221 .

[0107] By adopting the above technical solution, the first annular portion 1221 and the outer shell 11 are conveniently sealed and connected.

[0108] In other embodiments of this application, please refer to Figure 7 and Figure 8 The motor 10 further includes a second seal 15 , which is disposed between the second annular portion 1222 and the housing 11 to seal and connect the second annular portion 1222 and the housing 11 .

[0109] The second sealing member 15 is a component for sealing the gap between the second annular portion 1222 and the housing 11. The second sealing member 15 can be made of a flexible material, which can be, but is not limited to, rubber, silicone, and the like.

[0110] In some embodiments, the second seal 15 is annular and disposed around the axis of the stator 12. As an example, the second seal 15 is disposed between the outer circumference of the second annular portion 1222 and the inner circumferential wall of the housing 11. As an example, the second seal 15 is disposed between the end surface of the second annular portion 1222 facing away from the stator body 121 and the inner end surface of the housing 11 facing the second annular portion 1222.

[0111] In some embodiments, the second annular portion 1222 is provided with a second limiting groove, and the second sealing member 15 is disposed in the second limiting groove to limit the relative position of the second sealing member 15 and the second annular portion 1222 .

[0112] By adopting the above technical solution, the second annular portion 1222 and the outer shell 11 are easily sealed and connected.

[0113] In some other embodiments of this application, please refer to Figure 7 and Figure 8The motor 10 also includes a first seal 14 and a second seal 15. The first seal 14 is arranged between the first annular portion 1221 and the housing 11 to seal the first annular portion 1221 and the housing 11. The second seal 15 is arranged between the second annular portion 1222 and the housing 11 to seal the second annular portion 1222 and the housing 11.

[0114] By adopting the above technical solution, not only the first annular portion 1221 and the outer shell 11 are sealed and connected, but also the second annular portion 1222 and the outer shell 11 are sealed and connected.

[0115] In some embodiments of this application, please refer to Figure 7 and Figure 8 , the stator body 121 is fixedly connected to the housing 11.

[0116] The stator body 121 can be directly connected to the housing 11 or indirectly connected to the housing 11 via an adapter. The stator body 121 and the housing 11 can be connected by, but not limited to, welding, bonding, or fastening.

[0117] By adopting the above technical solution, the stator body 121 is effectively fixed, thereby effectively improving the structural stability of the motor 10 and further improving the working performance of the motor 10.

[0118] In some embodiments of this application, please refer to Figure 7 and Figure 8 The outer peripheral wall of the stator body 121 is interference-connected with the inner peripheral wall of the housing 11 .

[0119] The interference fit between the outer circumference of the stator body 121 and the inner circumference of the housing 11 means that the outer diameter of the stator body 121 is slightly larger than the inner diameter of the housing 11 so that the outer circumference of the stator body 121 and the inner circumference of the housing 11 fit tightly.

[0120] It can be understood that the first annular portion 1221 and the second annular portion 1222 are respectively arranged at opposite ends of the stator body 121 so that the outer peripheral wall of the stator body 121 is exposed to the stator cavity 1223, so as to interference connect the outer peripheral wall of the stator body 121 with the inner peripheral wall of the shell 11.

[0121] By adopting the above technical solution, it is convenient to fix the stator body 121 and the housing 11 together.

[0122] In some embodiments of this application, please refer to Figure 7 and Figure 8The stator 12 further includes a first connecting member 124 and a second connecting member 125 . The first connecting member 124 is connected between the first annular portion 1221 and the stator body 121 , and the second connecting member 125 is connected between the second annular portion 1222 and the stator body 121 .

[0123] The first connector 124 is used to connect the first annular portion 1221 and the stator body 121. It is understood that the first connector 124 is connected between the first annular portion 1221 and the first core 1211. In some embodiments, the first connector 124 has an annular structure and is disposed around the axis of the stator 12. One end of the first connector 124 is connected to the first annular portion 1221, and the other end of the first connector 124 is connected to the stator body 121. In other embodiments, there may be multiple first connectors 124, with multiple first connectors 124 disposed around the axis of the stator 12. The material of the first connector 124 may include, but is not limited to, aluminum, stainless steel, aluminum alloy, copper, plastic, etc.

[0124] The second connector 125 is used to connect the second annular portion 1222 and the stator body 121. It is understood that the second connector 125 is connected between the second annular portion 1222 and the second core. In some embodiments, the second connector 125 has an annular structure and is arranged around the axis of the stator 12. One end of the second connector 125 is connected to the second annular portion 1222, and the other end of the second connector 125 is connected to the stator body 121. In other embodiments, there may be multiple second connectors 125, and multiple second connectors 125 are arranged around the axis of the stator 12. The material of the second connector 125 may be, but is not limited to, aluminum, stainless steel, aluminum alloy, copper, plastic, etc.

[0125] By adopting the above technical solution, it is convenient to connect the first liquid collecting member with the stator body 121 , thereby effectively improving the structural stability of the stator 12 , thereby further improving the working performance of the motor 10 .

[0126] In some embodiments of the present application, one end of the first connecting member 124 is embedded in the wall of the first annular portion 1221 , and the other end of the first connecting member 124 is connected to the stator body 121 .

[0127] In some embodiments, the first annular portion 1221 is an injection molded part. During the molding process of the first annular portion 1221, at least a portion of the first connecting member 124 can be placed in the molding mold of the first annular portion 1221, and slurry is poured into the molding mold so that the slurry wraps at least a portion of the first connecting member 124. After the slurry solidifies, the first annular portion 1221 is formed, and at least a portion of the first connecting member 124 is embedded in the wall of the first annular portion 1221.

[0128] In other embodiments, a first engaging groove is defined at one end of the first annular portion 1221 facing the stator body 121 , and one end of the first connector 124 is inserted into the first engaging groove to connect the first annular portion 1221 to the first connector 124 .

[0129] By adopting the above technical solution, the connection strength between the first connecting member 124 and the first annular portion 1221 is effectively improved.

[0130] In some other embodiments of the present application, one end of the second connecting member 125 is embedded in the wall of the second annular portion 1222 , and the other end of the second connecting member 125 is connected to the stator body 121 .

[0131] In some embodiments, the second annular portion 1222 is an injection molded part. During the molding process of the second annular portion 1222, at least a portion of the second connecting member 125 can be placed in the molding mold of the second annular portion 1222, and slurry is poured into the molding mold so that the slurry wraps at least a portion of the second connecting member 125. After the slurry solidifies, the second annular portion 1222 is formed, and at least a portion of the second connecting member 125 is embedded in the wall of the second annular portion 1222.

[0132] In other embodiments, a second engaging groove is defined at one end of the second annular portion 1222 facing the stator body 121 , and one end of the second connector 125 is inserted into the second engaging groove to connect the second annular portion 1222 to the second connector 125 .

[0133] By adopting the above technical solution, the connection strength between the second connecting member 125 and the second annular portion 1222 is effectively improved.

[0134] In some other embodiments of the present application, one end of the first connecting member 124 is embedded in the wall of the first annular portion 1221, and the other end of the first connecting member 124 is connected to the stator body 121; one end of the second connecting member 125 is embedded in the wall of the second annular portion 1222, and the other end of the second connecting member 125 is connected to the stator body 121.

[0135] By adopting the above technical solution, the connection strength between the first connecting member 124 and the first annular portion 1221 and the connection strength between the second connecting member 125 and the second annular portion 1222 are effectively improved.

[0136] In some embodiments of the present application, the first connecting member 124 is a metal member.

[0137] In other words, the first connecting member 124 is made of metal material, and the metal material may be but is not limited to aluminum, iron, copper, aluminum alloy, stainless steel, etc.

[0138] In some embodiments, the first connector 124 is welded to the stator body 121, specifically, the first connector 124 is welded to the first core 1211. As an example, the material of the first connector 124 can be the same as that of the first core 1211 to further improve the connection strength between the first annular portion 1221 and the stator body 121.

[0139] Of course, in other embodiments, the first connecting member 124 may also be connected to the stator body 121 in other connection manners, such as bonding, fastening, etc.

[0140] By adopting the above technical solution, the connection strength between the first annular portion 1221 and the stator body 121 is effectively improved.

[0141] In some other embodiments of the present application, the second connecting member 125 is a metal member.

[0142] In other words, the second connecting member 125 is made of metal material, and the metal material may be but is not limited to aluminum, iron, copper, aluminum alloy, stainless steel, etc.

[0143] In some embodiments, the second connector 125 is welded to the stator body 121. Specifically, the second connector 125 is welded to the second core. As an example, the material of the second connector 125 can be the same as that of the first core 1211 to further improve the connection strength between the second annular portion 1222 and the stator body 121.

[0144] Of course, in other embodiments, the second connecting member 125 may also be connected to the stator body 121 in other connection manners, such as bonding, fastening, etc.

[0145] By adopting the above technical solution, the connection strength between the second annular portion 1222 and the stator body 121 is effectively improved.

[0146] In some other embodiments of the present application, the first connecting member 124 is a metal member, and the second connecting member 125 is a metal member.

[0147] By adopting the above technical solution, the connection strength between the first annular portion 1221 and the stator body 121 and the connection strength between the second annular portion 1222 and the stator body 121 are effectively improved.

[0148] In some embodiments of this application, please refer to Figure 5 and Figure 7The first liquid collecting ring 122 is provided with a first lead-out hole 1224. The motor 10 also includes a lead-out wire 16. One end of the lead-out wire 16 is electrically connected to the stator body 121. The other end of the lead-out wire 16 passes through the first lead-out hole 1224 and extends to the outside of the stator cavity 1223. The lead-out wire 16 is sealed with the hole wall of the first lead-out hole 1224.

[0149] Lead wire 16 is a component used to input or output current to or from stator body 121. One end of lead wire 16 is electrically connected to stator body 121, and the other end of lead wire 16 is inserted into first lead hole 1224 and electrically connected to an external connector. Lead wire 16 can be connected to stator body 121 or an external connector by, but is not limited to, welding or fastening. Lead wire 16 can be round or flat wire. Materials for lead wire 16 can include, but are not limited to, copper, aluminum, aluminum alloy, iron, stainless steel, and the like.

[0150] It is understood that the first outlet hole 1224 passes through the wall of the first collecting ring 122 to connect the stator cavity 1223 with the external environment of the first collecting ring 122. The shape of the first outlet hole 1224 can be, but is not limited to, circular, square, elliptical, triangular, etc.

[0151] The first outlet hole 1224 can be provided on the end side of the first liquid collecting ring 122, or on the outer circumference of the first liquid collecting ring 122. In some embodiments, the first outlet hole 1224 is provided on the second annular portion 1222. As an example, the first outlet hole 1224 is provided on the second cover plate. Of course, in other embodiments, the first outlet hole 1224 can also be provided on other components of the first liquid collecting ring 122, for example, the first outlet hole 1224 is provided on the first annular wall of the first annular portion 1221, or on the second annular wall of the second annular portion 1222, or on the first cover plate of the first annular portion 1221.

[0152] The sealed connection between the lead wire 16 and the wall of the first lead hole 1224 means that a sealing structure is provided between the lead wire 16 and the wall of the first lead hole 1224 to block the gap between the lead wire 16 and the wall of the first lead hole 1224. The sealing structure can be provided between the outer periphery of the lead wire 16 and the wall of the first lead hole 1224.

[0153] By adopting the above technical solution, the situation where the cooling medium leaks from the stator cavity 1223 through the first outlet hole 1224 to the inner ring space of the second collecting ring 123 is effectively improved, the oil stirring loss of the rotor 13 is further reduced, the working efficiency of the motor 10 is further improved, and the working performance of the motor 10 is further improved.

[0154] In some embodiments of this application, please refer to Figure 5 and Figure 7 The motor 10 further includes a third seal 17 , which is disposed between the lead wire 16 and the hole wall of the first lead hole 1224 to seal the lead wire 16 and the hole wall of the first lead hole 1224 .

[0155] The third sealing member 17 is a component for sealing the gap between the lead-out wire 16 and the hole wall of the first lead-out hole 1224. The third sealing member 17 can be made of a flexible material, which can be, but is not limited to, rubber, silicone, and the like.

[0156] In some embodiments, the third sealing member 17 is annular and is disposed around the lead wire 16. As an example, the third sealing member 17 is disposed between the outer periphery of the lead wire 16 and the wall of the first lead hole 1224 to seal the outer periphery of the lead wire 16 and the wall of the first lead hole 1224.

[0157] By adopting the above technical solution, it is convenient to seal and connect the lead wire 16 and the hole wall of the first lead hole 1224 .

[0158] In some embodiments of this application, please refer to Figure 5 and Figure 8 The first liquid collecting ring 122 is provided with a second outlet hole 1225. The motor 10 also includes a temperature detection element 18 for detecting the temperature of the stator body 121. The temperature detection element 18 extends to the outside of the stator cavity 1223 through the second outlet hole 1225. The temperature detection element 18 is sealed and connected to the hole wall of the second outlet hole 1225.

[0159] The temperature sensing element 18 is a component used to detect the temperature of the stator body 121. One end of the temperature sensing element 18 is a sensing end, which extends into the stator cavity 1223 to detect the temperature of the stator body 121. The other end of the temperature sensing element 18 is inserted into the second lead-out hole 1225 and electrically connected to the data collection device to detect the temperature of the stator body 121. The temperature sensing element 18 can be, but is not limited to, an infrared temperature sensor, an ultrasonic temperature sensor, a thermocouple temperature sensor, a contact temperature sensor, or the like.

[0160] It is understood that the second outlet hole 1225 passes through the wall of the first collecting ring 122 to connect the stator cavity 1223 with the external environment of the first collecting ring 122. The shape of the second outlet hole 1225 can be, but is not limited to, circular, square, elliptical, triangular, etc.

[0161] The second outlet hole 1225 can be provided on the end side of the first collecting ring 122, or on the outer circumference of the first collecting ring 122. In some embodiments, the second outlet hole 1225 is provided on the second annular portion 1222. As an example, the second outlet hole 1225 is provided on the second cover plate. Of course, in other embodiments, the second outlet hole 1225 can also be provided on other components of the first collecting ring 122, for example, the second outlet hole 1225 is provided on the first annular wall of the first annular portion 1221, or on the second annular wall of the second annular portion 1222, or on the first cover plate of the first annular portion 1221.

[0162] In some embodiments, the first outlet hole 1224 and the second outlet hole 1225 are both opened on the second cover plate.

[0163] The sealed connection between the temperature sensing element 18 and the wall of the second lead-out hole 1225 means that a sealing structure is provided between the temperature sensing element 18 and the wall of the second lead-out hole 1225 to block the gap between the temperature sensing element 18 and the wall of the second lead-out hole 1225. The sealing structure can be provided between the outer periphery of the temperature sensing element 18 and the wall of the second lead-out hole 1225.

[0164] By adopting the above technical solution, the situation where the cooling medium leaks from the stator cavity 1223 through the second outlet hole 1225 to the inner ring space of the second collecting ring 123 is effectively improved, the oil stirring loss of the rotor 13 is further reduced, the working efficiency of the motor 10 is further improved, and the working performance of the motor 10 is further improved.

[0165] In some embodiments of this application, please refer to Figure 5 and Figure 8 The motor 10 further includes a fourth seal 19 , which is disposed between the temperature detection element 18 and the wall of the second lead-out hole 1225 to seal the connection between the temperature detection element 18 and the wall of the second lead-out hole 1225 .

[0166] The fourth sealing member 19 is a component for sealing the gap between the temperature detection element 18 and the wall of the second lead-out hole 1225. The fourth sealing member 19 can be made of a flexible material, which can be, but is not limited to, rubber, silicone, and the like.

[0167] In some embodiments, the fourth sealing member 19 is annular and disposed around the temperature sensing element 18. For example, the fourth sealing member 19 is disposed between the outer periphery of the temperature sensing element 18 and the wall of the second outlet hole 1225 to seal the outer periphery of the temperature sensing element 18 and the wall of the second outlet hole 1225.

[0168] By adopting the above technical solution, it is convenient to seal and connect the temperature detection element 18 and the hole wall of the second lead-out hole 1225 .

[0169] In some embodiments of this application, please refer to Figure 9 The second collecting ring 123 includes a main body 1231 with an annular structure and a slot wedge 1232 connected to the outer peripheral wall of the main body 1231. The rotor main body 131 is accommodated in the inner ring space of the main body 1231. The first iron core 1211 is sleeved on the main body 1231. The slot wedge 1232 is inserted into the notch of the winding groove to seal the winding groove.

[0170] The main body 1231 is the primary portion of the second liquid collecting ring 123. The main body 1231 has an annular structure. The first core 1211 is sleeved around the outer periphery of the main body 1231, and the rotor body 131 is accommodated within the inner annular space of the main body 1231. As will be understood, the first liquid collecting element is sleeved around the outer periphery of the main body 1231 and is sealed therewith to define the stator cavity 1223.

[0171] The slot wedge 1232 is a component used to secure the winding 1212. When the winding operation of the winding 1212 is completed, the first iron core 1211 can be sleeved on the main body 1231. During this process, the slot wedge 1232 will move with the main body 1231 and be inserted into the winding slot to block the notch of the winding slot, thereby securing the winding 1212 in the winding slot. The slot wedge 1232 and the main body 1231 can be integrally molded components. For example, the slot wedge 1232 and the main body 1231 are integrally molded using an injection molding process. The slot wedge 1232 and the main body 1231 can also be separately molded and then connected to form a whole. For example, the slot wedge 1232 and the main body are separately molded using an injection molding process and then bonded to each other to form a whole.

[0172] In some embodiments, the first iron core 1211 is provided with a plurality of winding slots, which are arranged around the central axis of the stator 12. There are multiple slot wedges 1232, which are arranged at circumferential intervals along the main body 1231. The multiple slot wedges 1232 are arranged one-to-one corresponding to the multiple winding slots.

[0173] By adopting the above technical solution, during the assembly of the stator body 121 and the second liquid collecting ring 123, the slot wedge 1232 is inserted into the slot of the winding slot, which effectively simplifies the assembly process of the stator 12 and effectively improves the assembly efficiency of the motor 10.

[0174] In some embodiments of the present application, the second liquid collecting ring 123 is a heat conducting member.

[0175] In other words, the second liquid collecting ring 123 is made of a heat-conducting material, and the heat-conducting material may be, but is not limited to, copper, aluminum, aluminum alloy, silicon carbide, and the like.

[0176] By adopting the above technical solution, the heat generated by the rotor 13 can be transferred to the cooling medium in the stator cavity 1223 through the second liquid collecting ring 123, further improving the cooling efficiency of the motor 10 and thus further improving the working performance of the motor 10.

[0177] In some embodiments of this application, please refer to Figure 5 、 Figure 7 and Figure 8 A cooling channel 1321 is opened inside the rotating shaft 132, and the stator cavity 1223 is connected to the cooling channel 1321 through an external pipeline.

[0178] Cooling channel 1321 is used to provide a flow path for the cooling medium within the rotating shaft 132. In some embodiments, cooling channel 1321 extends along the axis of the rotating shaft 132, extending along opposite ends of the rotating shaft 132. In some embodiments, cooling channel 1321 may extend parallel to the central axis of the rotating shaft 132. Of course, in other embodiments, cooling channel 1321 may extend at an angle relative to the central axis of the rotating shaft 132, or may extend in a curved manner.

[0179] The stator cavity 1223 is connected to the cooling channel 1321 through the external pipeline, which means that at least part of the cooling medium in the stator cavity 1223 can flow into the cooling channel 1321 through the external pipeline.

[0180] By adopting the above technical solution, the cooling medium can flow from the stator cavity 1223 into the cooling channel 1321 through the external pipeline to successively absorb the heat generated by the stator 12 and the heat generated by the rotor 13. In this way, not only the stator 12 is cooled, but also the rotor 13 is effectively cooled without the rotor body 131 being immersed in the cooling medium, thereby further improving the cooling efficiency and working efficiency of the motor 10, thereby further improving the working performance of the motor 10.

[0181] Second, see Figure 3 , an embodiment of the present application provides an electric drive device 1, comprising the motor 10 described in any of the above embodiments.

[0182] The electric drive device 1 provided in the embodiment of the present application effectively improves the working performance of the electric drive device 1 because it adopts the motor 10 described in any of the above embodiments.

[0183] Thirdly, please refer to Figure 1An embodiment of the present application provides an electric drive system, including a battery 2 and the above-mentioned electric drive device 1, where the battery 2 is electrically connected to the motor 10.

[0184] The electric drive system provided in the embodiment of the present application effectively improves the working performance of the electric drive system due to the adoption of the above-mentioned electric drive device 1.

[0185] For the fourth aspect, please refer to Figure 1 , an embodiment of the present application provides an electric device, including the above-mentioned electric drive device 1 or the above-mentioned electric drive system.

[0186] The electric device provided in the embodiment of the present application effectively improves the working performance of the electric device due to the adoption of the above-mentioned electric drive device 1 or the above-mentioned electric drive system.

[0187] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A motor, characterized in that: The motor comprises: a housing having a cavity; a stator accommodated in the cavity, the stator comprising a stator body, a first liquid collecting ring, and a second liquid collecting ring, the first liquid collecting ring being sleeved on the outer circumference of the second liquid collecting ring and being sealedly connected to the second liquid collecting ring to define a stator cavity separated from the inner ring space of the second liquid collecting ring, the stator cavity being used to accommodate a cooling medium, at least a portion of the stator body being accommodated in the stator cavity so that at least a portion of the stator body is immersed in the cooling medium; The rotor comprises a rotor body and a rotating shaft. The rotor body is accommodated in the inner ring space of the second collecting ring and is coaxially connected to the rotating shaft.

2. The motor according to claim 1, wherein The stator cavity includes a first cavity and a second cavity, the first liquid collecting ring includes a first annular portion and a second annular portion, the first annular portion and the second annular portion are arranged at opposite ends of the stator body and are both sealed with the second liquid collecting ring, the first annular portion, one end of the stator body and one end of the second liquid collecting ring together form the first cavity, the second annular portion, the other end of the stator body and the other end of the second liquid collecting ring together form the second cavity, and the stator body is provided with a connecting flow channel, which connects the first cavity and the second cavity.

3. The motor according to claim 2, characterized in that The first annular portion is sealed and connected to the housing, and the second annular portion is sealed and connected to the housing.

4. The motor according to claim 3, wherein The motor further includes a first seal, which is disposed between the first annular portion and the housing to seal the first annular portion and the housing; and / or, The motor further includes a second seal disposed between the second annular portion and the housing to seal the second annular portion and the housing.

5. The motor according to claim 2, wherein The stator body is fixedly connected to the housing.

6. The motor according to claim 5, characterized in that The outer peripheral wall of the stator body is interference-connected with the inner peripheral wall of the housing.

7. The motor according to claim 2, wherein: The stator further includes a first connecting member and a second connecting member, wherein the first connecting member is connected between the first annular portion and the stator body, and the second connecting member is connected between the second annular portion and the stator body.

8. The motor according to claim 7, characterized in that One end of the first connecting member is embedded in the wall of the first annular portion, and the other end of the first connecting member is connected to the stator body; and / or, One end of the second connecting member is embedded in the wall of the second annular portion, and the other end of the second connecting member is connected to the stator body.

9. The motor according to claim 7, wherein The first connecting member is a metal member; and / or, The second connecting member is a metal member.

10. The motor according to any one of claims 1 to 9, characterized in that The first liquid collecting ring is provided with a first lead-out hole, and the motor further includes a lead-out wire, one end of the lead-out wire is electrically connected to the stator body, and the other end of the lead-out wire passes through the first lead-out hole and extends to the outside of the stator cavity, and the lead-out wire is sealed with the hole wall of the first lead-out hole.

11. The motor according to claim 10, wherein The motor further includes a third seal, which is disposed between the lead wire and the hole wall of the first lead hole to seal the lead wire and the hole wall of the first lead hole.

12. The motor according to any one of claims 1 to 9, characterized in that The first liquid collecting ring is provided with a second outlet hole, and the motor further includes a temperature detection element for detecting the temperature of the stator body. The temperature detection element extends to the outside of the stator cavity through the second outlet hole, and the temperature detection element is sealed with the hole wall of the second outlet hole.

13. The motor according to claim 12, wherein: The motor further includes a fourth sealing member disposed between the temperature detection element and a hole wall of the second lead-out hole to seal and connect the temperature detection element and the hole wall of the second lead-out hole.

14. The motor according to any one of claims 1 to 9, characterized in that The second collecting ring includes a main body with an annular structure and a slot wedge connected to the outer peripheral wall of the main body. The rotor main body is accommodated in the inner ring space of the main body. The stator main body includes a first iron core and a winding. The first iron core is provided with a winding groove, and the winding is wound in the winding groove. The first iron core is sleeved on the main body, and the slot wedge is inserted into the notch of the winding groove to seal the winding groove.

15. The motor according to any one of claims 1 to 9, characterized in that The second liquid collecting ring is a heat conducting member.

16. The motor according to any one of claims 1 to 9, characterized in that A cooling channel is provided inside the rotating shaft, and the stator cavity is connected to the cooling channel through an external pipeline.

17. An electric drive device, characterized in that: The electric drive device comprises the motor according to any one of claims 1 to 16.

18. An electric drive system, characterized in that: The electric drive system includes a battery and the electric drive device according to claim 17 , wherein the battery is electrically connected to the motor.

19. An electric device, characterized in that: The electric device includes the electric drive apparatus according to claim 17 or the electric drive system according to claim 18 .

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