Motor, electric drive assembly and power device

Abstract

The utility model is suitable for the field of motors, and provides a motor, an electric drive assembly and a power device. The rotor is rotatably arranged in the shell; the stator is arranged in the shell and is coaxial with the rotor, and an air gap is formed between the stator and the rotor; and the cooling structure comprises a first oil spraying opening facing the air gap, and the first oil spraying opening is used for spraying cooling liquid into the air gap. The motor provided by the embodiment of the utility model has a relatively good cooling effect.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. The electric drive assembly is the power source of the electric vehicle, and the motor is the power structure of the electric drive assembly. Therefore, the smooth operation of the motor is the prerequisite for ensuring the normal operation of the electric vehicle.

[0003] In order to ensure the smooth operation of the motor, it is necessary to ensure that the motor is well cooled. At present, the motor usually has a cooling structure on the outside of the stator, which makes it difficult to cool the air gap between the stator and the rotor, and the cooling effect of the motor needs to be improved. Utility Model Content

[0004] In view of this, the embodiments of the present application provide a motor, an electric drive assembly and a power device, which can cool the air gap of the motor and improve the cooling effect of the motor.

[0005] An embodiment of the first aspect of the present application proposes a motor, comprising: a shell; a rotor rotatably disposed in the shell; a stator disposed in the shell and coaxially with the rotor, with an air gap between the stator and the rotor; a cooling structure, comprising a first oil spray port disposed toward the air gap, the first oil spray port being used to spray coolant into the air gap.

[0006] The motor provided in the embodiment of the present application includes a housing, a rotor, a stator and a cooling structure. An air gap is provided between the rotor and the stator. The cooling structure includes a first oil spray port arranged toward the air gap. The first oil spray component can spray coolant into the air gap between the stator and the rotor, so that the coolant is accurately sprayed onto the inner side surface of the stator and the outer side surface of the rotor or onto the inner side surface of the rotor and the outer side surface of the stator, thereby achieving the effect of precise cooling of the stator and the rotor, improving the heat dissipation efficiency of the stator and the rotor, and thereby improving the cooling effect of the entire motor, while also improving the operating reliability of the motor.

[0007] In some embodiments, the cooling structure includes at least two of the first oil injection ports, and the at least two of the first oil injection ports are respectively disposed at two ends of the rotor along a first direction, and the first direction is parallel to the axial direction of the rotor.

[0008] By adopting the above technical solution, the first oil spray ports at both ends of the rotor can spray oil into the air gap at the same time, thereby improving the cooling uniformity of the rotor and the stator in the first direction. The first oil spray ports can spray oil on the surface of the rotor in a targeted manner, thereby achieving a precise cooling effect and improving the cooling efficiency.

[0009] In some embodiments, at least one of the first oil injection ports is disposed on one side of the rotor along a second direction, and at least one of the first oil injection ports is disposed on the other side of the rotor along the second direction, and the second direction is parallel to the radial direction of the rotor.

[0010] By adopting the above technical solution, the cooling structure sprays oil from the upper and lower sides of the rotor simultaneously through multiple first oil injection ports, thereby further improving the cooling efficiency.

[0011] In some embodiments, the first oil distribution member includes a first oil distribution pipe and an oil spray nozzle connected to the first oil distribution pipe, the oil spray nozzle is opposite to the air gap, and the first oil spray port is arranged on the oil spray nozzle.

[0012] By adopting the above technical solution, the first oil branch pipe can transmit the coolant and the oil injector can accurately spray the coolant into the air gap, so the cooling efficiency is high.

[0013] In some embodiments, the plurality of first fuel injection ports are arranged at intervals along the fuel injection nozzle, and the plurality of first fuel injection ports are arranged along a circumferential direction of the air gap.

[0014] By adopting the above technical solution, the oil nozzles can be arranged along the circumference of the air gap to perform all-round cooling of the circumference of the air gap. The oil nozzles can cool the outer side surface of the rotor and the inner side surface of the stator through multiple first oil nozzles. The outer side surface of the rotor and the inner side surface of the stator have better cooling uniformity along the circumferential direction, and the cooling effect is better.

[0015] In some embodiments, the cooling structure further includes an oil reservoir and a first oil pump disposed in the shell, the oil reservoir being used to store coolant, and the first oil pump being used to pump the coolant in the oil reservoir into the first oil injection port.

[0016] By adopting the above technical solution, an oil reservoir and a first oil pump are provided in the housing of the motor, the coolant can be circulated inside the motor, the cooling structure is simple in structure, and the operation mode is relatively simple.

[0017] In some embodiments, the first oil pump is used to pump coolant when the rotor is not rotating, and / or,

[0018] The cooling structure further includes a first control valve, and the first control valve is used to control the first oil spraying component to spray cooling liquid when the rotor is in a non-rotating state.

[0019] By adopting the above technical solution, the first oil pump or the first control valve can control the first oil spray component to spray coolant when the rotor is not rotating, thereby solving the problem of large motor loss and low efficiency caused by rotor oil throwing.

[0020] In some embodiments, the first control valve is a one-way solenoid valve.

[0021] By adopting the above technical solution, the first control valve can allow the coolant to flow only from the main oil pipe toward the first oil injection component, and will not allow the coolant to flow from the first oil injection component toward the main oil pipe.

[0022] In some embodiments, the stator is sleeved on the outer side of the rotor, and the cooling structure further includes a second oil spray port, and the second oil spray port is used to spray cooling liquid onto the outer surface of the stator.

[0023] By adopting the above technical solution, the cooling structure can simultaneously cool the outer surface of the stator and the inner surface of the stator, as well as the outer surface of the rotor, thereby improving the cooling efficiency of the motor as a whole.

[0024] In some embodiments, the cooling structure further includes a second oil pump, and the second oil pump is used to pump the coolant in the oil reservoir to the second oil injection port.

[0025] By adopting the above technical solution, the first oil pump and the second oil pump respectively control the oil injection action of the first oil injection port and the second oil injection port to meet the cooling requirements of the motor under different states.

[0026] In some embodiments, the cooling structure also includes a main oil pipe connected to the oil reservoir, and the first oil injection port and the second oil injection port are both connected to the main oil pipe; the first oil pump is used to draw coolant in the oil reservoir to the main oil pipe.

[0027] By adopting the above technical solution, the cooling structure only needs to be provided with one oil pump to pump the coolant in the oil reservoir to the first oil injection port and the second oil injection port, thereby saving the cost of the oil pump.

[0028] In some embodiments, the cooling structure further includes a second control valve, and the second control valve is used to control the second oil injection port to spray cooling liquid.

[0029] By providing the second control valve, the cooling structure can control the oil injection action of the second oil injection port so as to spray the coolant to the stator when the stator needs to be cooled.

[0030] An embodiment of the second aspect of the present application provides an electric drive assembly, comprising the motor as described in the first aspect.

[0031] In some embodiments, the electric drive assembly further includes a controller, the motor is electrically connected to the controller, and the controller is used to control the first oil spray port to spray coolant when the rotor is in a non-rotating state.

[0032] By adopting the above technical solution, the controller can control the oil injection action of the first oil injection port, thereby solving the problem of large loss and low efficiency caused by oil injection when the rotor rotates.

[0033] An embodiment of the third aspect of the present application provides a power device, comprising the electric drive assembly of the second aspect.

[0034] 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

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or conventional technical descriptions will be briefly introduced below. 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 paying creative labor.

[0036] Figure 1 is a structural schematic diagram of a motor provided in the first embodiment of the present application;

[0037] Figure 2 is a cross-sectional schematic diagram of a rotor and a stator in a motor provided in some embodiments of the present application;

[0038] Figure 3 is a structural schematic diagram of a motor provided in the second embodiment of the present application;

[0039] Figure 4 is a schematic structural diagram of a motor provided in a third embodiment of the present application;

[0040] Figure 5 is a structural schematic diagram of a motor provided in a fourth embodiment of the present application;

[0041] Figure 6 is a structural schematic diagram of a motor provided in a fifth embodiment of the present application;

[0042] Figure 7 is a structural schematic diagram of a motor provided in a sixth embodiment of the present application;

[0043] Figure 8 is a structural schematic diagram of a motor provided in the seventh embodiment of the present application;

[0044] Fig. 9 yes Figure 8 The schematic diagram of the structure of the first oil distributor in the motor is shown.

[0045] The meanings of the marks in the figure are:

[0046] 100. Motor;

[0047] 10. housing; 20. rotor; 21. output shaft; 30. stator; 101. air gap;

[0048] 40. Cooling structure;

[0049] 41. a first fuel injection component; 411. a first fuel injection port; 412. a first fuel distributor; 4121. a first fuel distributor pipe; 4122. a fuel injection nozzle;

[0050] 42. Second fuel injection component; 421. Second fuel injection port; 43. Oil reservoir; 44. First oil pump; 45. First control valve; 46. Main oil pipe; 47. Second oil pump; 48. Second control valve. DETAILED DESCRIPTION

[0051] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field 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" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0053] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0054] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0055] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0056] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0057] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientations or positional relationships shown in the accompanying drawings. They 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0058] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0059] The electric drive assembly is the core component of new energy electric vehicles. Its function is to convert chemical energy into kinetic energy of electric vehicles. Its function is equivalent to the powertrain of traditional fuel vehicles - engine and transmission. The electric drive assembly is the power source of electric vehicles, and the motor is the power structure of the electric drive assembly. Therefore, the smooth operation of the motor is the prerequisite for the normal operation of electric vehicles.

[0060] In order to ensure the smooth operation of the motor, it is necessary to ensure that the motor is well cooled. At present, the motor usually has a cooling structure on the outside of the stator, which makes it difficult to cool the air gap between the stator and the rotor, and the cooling effect of the motor needs to be improved.

[0061] In view of this, the present application proposes a motor, including a housing, a rotor, a stator and a cooling structure, wherein the rotor is rotatably disposed in the housing, the stator is disposed in the housing and is coaxially disposed with the rotor, and an air gap is provided between the stator and the rotor; the cooling structure includes a first oil spray port disposed toward the air gap, and the first oil spray port is used to spray coolant into the air gap. In this way, the first oil spray component can spray the coolant into the air gap between the stator and the rotor, so that the coolant is precisely sprayed onto the inner side surface of the stator and the outer side surface of the rotor or onto the outer side surface of the stator and the inner side surface of the rotor, thereby achieving the effect of precisely cooling the air gap and improving the cooling effect of the motor.

[0062] The motor and electric drive assembly disclosed in the embodiment of the present application can be used as a power source of a power device, such as applied to power tools, electric bicycles, electric vehicles, ships, spacecraft, etc. Among them, the spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc. An embodiment of the present application is described by taking a vehicle as an example of a power device.

[0063] The first embodiment of the present application provides a motor. Figure 1 and Figure 2 The first embodiment of the present application provides a motor 100, which includes a housing 10, a rotor 20, a stator 30 and a cooling structure 40. The rotor 20 is rotatably disposed in the housing 10, the stator 30 is disposed in the housing 10 and is coaxially disposed with the rotor 20, and an air gap 101 is provided between the stator 30 and the rotor 20; the cooling structure 40 includes a first oil spray port 411 disposed toward the air gap 101, and the first oil spray port 411 is used to spray coolant into the air gap 101.

[0064] The motor 100 is a power source of the electric drive assembly, and refers to an electromagnetic device that realizes the conversion or transmission of electric energy according to the law of electromagnetic induction. The motor 100 includes a stator 30 and a rotor 20. The stator 30 drives the rotor 20 to rotate to realize the conversion of electric energy into mechanical energy, thereby outputting torque to the outside. When the stator 30 drives the rotor 20 to rotate, it will generate heat, which requires the motor 100 to be cooled.

[0065] In order to ensure the normal operation of the motor 100, a coolant needs to be supplied to remove the heat in the stator 30 and the rotor 20. The coolant can be cooling oil, which can directly contact the heat-generating components of the motor 100 and has high heat dissipation efficiency. The oil has the advantages of good insulation, high dielectric constant, low freezing point and high boiling point, which can improve the efficiency density of the motor 100. It can be understood that the coolant can also be other liquids, such as water.

[0066] The housing 10 is provided with an accommodating cavity to accommodate and install the rotor 20 and the stator 30. The stator 30 drives the rotor 20 to rotate to achieve power output. The stator 30 is sleeved on the outside of the rotor 20, and an air gap 101 is provided between the inner side of the stator 30 and the outer side of the rotor 20; in other embodiments, the rotor 20 is provided on the outside of the stator 30, and an air gap is provided between the inner side of the rotor 20 and the outer side of the stator 30.

[0067] The cooling structure 40 is used to cool the motor 100. The cooling structure 40 includes a first oil spray component 41. The first oil spray component 41 may include one or more pipelines for circulating coolant. The first oil spray component 41 includes one or more first oil spray ports 411. The first oil spray ports 411 are arranged toward the air gap 101, that is, the first oil spray ports 411 are arranged opposite to the air gap 101. The first oil spray ports 411 can spray coolant toward the air gap 101.

[0068] like Figure 1 As shown, since the first oil injection port 411 is disposed toward the air gap 101, the first oil injection port 411 can spray the coolant into the air gap 101, so that the coolant is precisely sprayed on the inner side surface of the stator 30 and the outer side surface of the rotor 20, so as to cool the inner side surface of the stator 30 and the outer side surface of the rotor 20. In another embodiment, when the rotor 20 is disposed outside the stator 30, the first oil injection port 411 can spray the coolant into the air gap, so that the coolant is precisely sprayed on the outer side surface of the stator 30 and the inner side surface of the rotor 20. It can be understood that the coolant sprayed into the air gap 101 can be collected and recycled.

[0069] The motor 100 provided in the embodiment of the present application includes a housing 10, a rotor 20, a stator 30 and a cooling structure 40. An air gap 101 is provided between the rotor 20 and the stator 30. The cooling structure 40 includes a first oil spray port 411 arranged toward the air gap 101. The first oil spray component 41 can spray coolant into the air gap 101 between the stator 30 and the rotor 20, so that the coolant is accurately sprayed to the inner side surface of the stator 30 and the outer side surface of the rotor 20 or the inner side surface of the rotor 20 and the outer side surface of the stator 30, thereby achieving the effect of precise cooling of the stator 30 and the rotor 20, improving the heat dissipation efficiency of the stator 30 and the rotor 20, thereby improving the cooling effect of the entire motor 100, and at the same time improving the operating reliability of the motor 100.

[0070] In some embodiments, the first oil spraying member 41 and the first oil spraying port 411 are configured to spray the coolant when the rotor 20 is not rotating.

[0071] The motor 100 has different usage states. When the rotor 20 is not rotating, that is, when the rotation speed of the rotor 20 is 0 rpm, the first oil spray component 41 sprays coolant toward the air gap 101; when the rotor 20 rotates, the first oil spray component 41 does not need to spray coolant to avoid oil being thrown off the rotor 20 due to oil accumulation, resulting in high loss and low efficiency of the motor 100.

[0072] Taking the motor 100 for a car as an example, when the car is driving, the motor 100 is in operation, and the first spray component 41 does not spray coolant; when the motor 100 stops running and needs to dissipate heat, for example, when the motor 100 is in a working mode such as boost charging or battery heating, the first spray component 41 sprays coolant.

[0073] By adopting the above technical solution, the first oil spray component 41 is configured to spray coolant when the rotor 20 is not rotating, which can solve the problem of large loss and low efficiency of the motor 100 caused by oil throwing off the rotor 20.

[0074] In some embodiments, the cooling structure 40 includes at least two first oil injection ports 411 , and the at least two first oil injection ports 411 are respectively disposed at two ends of the rotor 20 along a first direction, and the first direction is parallel to the axial direction of the rotor 20 .

[0075] like Figure 1 As shown, the first direction is the X direction. In the first embodiment, the first oil injection component 41 includes four first oil injection ports 411, and two first oil injection ports 411 are respectively provided at both ends of the rotor 20, that is, two first oil injection ports 411 are respectively provided at both ends of the air gap 101. It can be understood that the number of the first oil injection ports 411 can also be two, three or more than four.

[0076] By adopting the above technical solution, the first oil injection ports 411 at both ends of the rotor 20 can simultaneously spray oil into the air gap 101, thereby improving the cooling uniformity of the rotor 20 and the stator 30 in the first direction. The first oil injection ports 411 can spray oil on the surface of the rotor 20 in a targeted manner, thereby achieving a precise cooling effect and improving the cooling efficiency.

[0077] Please continue to refer to Figure 1 In some embodiments, at least one first oil injection port 411 is disposed on one side of the rotor 20 along the second direction, and at least one first oil injection port 411 is disposed on the other side of the rotor 20 along the second direction, and the second direction is parallel to the radial direction of the rotor 20.

[0078] like Figure 1As shown, the second direction is the Z direction. The motor 100 is usually placed horizontally in a power device such as a vehicle, that is, the axial direction of the stator 30 and the axial direction of the rotor 20 are both in the horizontal direction, and the radial direction of the stator 30 and the radial direction of the rotor 20 are both in the vertical direction. It can be understood that the motor 100 can also be installed in the power device at other angles.

[0079] In the first embodiment, the first oil spraying component 41 includes four first oil spraying ports 411, two of which are arranged on one side of the rotor 20 along the second direction, and the other two first oil spraying ports 411 are arranged on the other side of the rotor 20 along the second direction, that is, two first oil spraying ports 411 are respectively arranged on the upper and lower sides of the rotor 20. The first oil spraying component 41 sprays coolant toward the air gap 101 on the upper and lower sides of the rotor 20, and the sprayed coolant flows through the rotor 20 and the stator 30, and falls into the oil storage tank 43 below the housing 10 for easy recycling.

[0080] By adopting the above technical solution, the cooling structure 40 sprays oil from the upper and lower sides of the rotor 20 through the multiple first oil injection ports 411 at the same time, thereby further improving the cooling efficiency.

[0081] In some embodiments, the cooling structure 40 includes at least two first oil separators 412 , which are respectively disposed at two ends of the rotor 20 along the first direction, and the first oil injection port 411 is disposed on the first oil separator 412 .

[0082] The first oil distributor 412 includes an oil distributor pipe or an oil distributor channel for the coolant to flow. One end of the first oil distributor 412 is used to connect to the coolant supply device, and the other end is provided with a first oil injection port 411 .

[0083] Specifically, the first oil spraying component 41 includes at least two first oil distributors 412, and the at least two first oil distributors 412 are connected to the coolant supply device and extend to both ends of the rotor 20 along the first direction, respectively, so that the at least two first oil distributors 412 can spray coolant into the air gap 101 through the corresponding first oil spraying ports 411. Figure 1 As shown, the coolant supply device may be an oil reservoir 43 disposed in the housing 10 . In other embodiments, the coolant supply device may also be other oil storage components, and the coolant supply device may also be disposed outside the housing 10 .

[0084] by Figure 1For example, in the first embodiment, the first oil spray component 41 includes four first oil distributors 412, two of which are arranged at one end of the rotor 20 along the first direction X and are spaced apart in the second direction, and the other two first oil distributors 412 are arranged at the other end of the rotor 20 along the first direction X and are spaced apart in the second direction, and each first oil distributor 412 is provided with a first oil injection port 411. The first oil distributor 412 is an oil distributor pipe, and the first oil injection port 411 is a pipe port of the oil distributor pipe. It can be understood that the first oil spray component 41 also includes a main pipe that simultaneously connects multiple first oil distributors 412.

[0085] By adopting the above technical solution, the cooling structure 40 transmits the coolant through at least two first oil distributors 412 so as to spray the coolant to the two ends of the air gap 101 respectively. The structure of the first oil spraying component 41 is simple and easy to implement.

[0086] The specific structure of the first oil spraying component 41 can be flexibly set. The structure of the first oil spraying component 41 is described below by taking the first to seventh embodiments as examples.

[0087] Please refer to Figure 1 , Figure 3 In the first and second embodiments, the first oil injection component 41 includes four first oil injection ports 411, two of which are arranged at one end of the rotor 20 along the first direction X and are spaced apart in the second direction, and the other two first oil injection ports 411 are arranged at the other end of the rotor 20 along the first direction X and are spaced apart in the second direction.

[0088] Please refer to Figure 4 and Figure 6 In the third and fifth embodiments, the first oil injection component 41 includes two first oil injection ports 411, one of which is disposed at one end of the rotor 20 close to the output shaft 21 in the first direction and located at the lower side of the rotor 20, and the other first oil injection port 411 is disposed at one end of the rotor 20 away from the output shaft 21 in the first direction and located at the upper side of the rotor 20. The output shaft 21 is the output part when the motor 100 drives the rotating machine to move, and is connected to the rotor 20. Its main function is to transmit the rotating torque of the motor 100 to the output device by connecting with the transmission device, so that the machine can achieve the desired movement.

[0089] Please refer to Figure 5 and Figure 7 In the fourth and sixth embodiments, the first oil injection component 41 includes two first oil injection ports 411, one first oil injection port 411 is provided at one end of the rotor 20 close to the output shaft 21 along the first direction and is located on the upper side of the rotor 20, and the other first oil injection port 411 is provided at one end of the rotor 20 away from the output shaft 21 along the first direction and is located on the lower side of the rotor 20.

[0090] In the motor 100 provided in the above embodiment, the first oil spray component 41 can spray coolant to both ends of the air gap 101 along the first direction. Furthermore, the first oil spray component 41 can also spray coolant to both sides of the air gap 101 along the second direction to cool the outer surface of the rotor 20 and the inner surface of the stator 30.

[0091] In other embodiments, only one first oil spray port 411 may be provided, as long as the cooling liquid can be sprayed into the air gap 101 .

[0092] Please refer to Figure 2 , Figure 8 and Fig. 9 In some embodiments, the first oil distribution member 412 includes a first oil distribution pipe 4121 and an oil nozzle 4122 connected to the first oil distribution pipe 4121 , the oil nozzle 4122 is opposite to the air gap 101 , and the first oil injection port 411 is disposed on the oil nozzle 4122 .

[0093] The fuel injector 4122 is used to connect the first oil distribution pipe 4121 and set the first fuel injection port 411 . The fuel injector 4122 is opposite to the air gap 101 , so that the first fuel injection port 411 on the fuel injector 4122 can accurately spray the coolant into the air gap 101 .

[0094] By adopting the above technical solution, the first oil distribution pipe 4121 can transmit the coolant and the oil spray nozzle 4122 can accurately spray the coolant into the air gap 101, and the cooling efficiency is high.

[0095] Please continue to refer to Figure 2 , Figure 8 and Fig. 9 In the seventh embodiment, the plurality of first oil injection ports 411 are arranged at intervals along the oil injection nozzle 4122 , and the plurality of first oil injection ports 411 are arranged along the circumferential direction of the air gap 101 .

[0096] like Figure 2 As shown, the cross section of the air gap 101 is circular. Figure 8 and Fig. 9 As shown, in the seventh embodiment, the cross-section of the fuel injector 4122 is also circular, and the size of the fuel injector 4122 can be consistent with or close to the size of the air gap 101; a plurality of first fuel injectors 411 are arranged at intervals on the fuel injector 4122, and a plurality of first fuel injectors 4122 are arranged along the circumference of the air gap 101, so that the fuel injector 4122 can simultaneously spray oil into the air gap 101 through the plurality of first fuel injectors 411 to cool the circumference of the air gap 101, that is, to cool the outer side surface of the rotor 20 and the inner side surface of the stator 30.

[0097] In other embodiments, the fuel injection nozzle 4122 may also be arc-shaped, and then a plurality of fuel injection nozzles 4122 are arranged in sequence or at intervals along the air gap 101 .

[0098] By adopting the above technical solution, the oil nozzle 4122 can be arranged along the circumference of the air gap 101 to perform all-round cooling on the circumference of the air gap 101. The oil nozzle 4122 can cool the outer side surface of the rotor 20 and the inner side surface of the stator 30 through multiple first oil nozzles 411. The outer side surface of the rotor 20 and the inner side surface of the stator 30 have better cooling uniformity along the circumferential direction, and the cooling effect is better.

[0099] Please refer to Figures 1 to 8 In some embodiments, the cooling structure 40 also includes an oil reservoir 43 and a first oil pump 44 disposed in the shell 10 , the oil reservoir 43 is used to store coolant, and the first oil pump 44 is used to pump the coolant in the oil reservoir 43 to the first oil injection port 411 .

[0100] The oil reservoir 43 is disposed in the housing 10 and is used to store the coolant. The oil reservoir 43 may be disposed at the bottom of the housing 10, the rotor 20 and the stator 30 are located above the oil reservoir 43, and the coolant sprayed by the first oil spraying component 41 toward the rotor 20 and the stator 30 falls into the oil reservoir 43 under the action of gravity. The first oil pump 44 is connected to the first oil spraying component 41, and the first oil pump 44 is used to pump the coolant in the oil reservoir 43 to the first oil spraying component 41 and spray the coolant from the first oil spraying port 411.

[0101] By adopting the above technical solution, an oil reservoir 43 and a first oil pump 44 are provided in the housing 10 of the motor 100, and the coolant can be circulated inside the motor 100. The cooling structure 40 has a simple structure and a relatively simple operation mode.

[0102] In other embodiments, the oil reservoir 43 may be omitted, and the coolant supply device may be disposed outside the housing 10 , as long as the first oil spray component 41 can be connected to the coolant supply device.

[0103] In some embodiments, the first oil pump 44 is used to pump coolant when the rotor 20 is in a non-rotating state, and / or the cooling structure 40 also includes a first control valve 45, which is used to control the first oil spray component 41 to spray coolant when the rotor 20 is in a non-rotating state.

[0104] Please refer to Figure 1 In the first embodiment, the first oil pump 44 is connected to the first oil injection component 41. The first oil pump 44 can pump coolant when the rotor 20 is not rotating, so that the first oil injection component 41 only sprays coolant when the rotor 20 is not rotating, which can solve the problem of large loss and low efficiency of the motor 100 caused by oil throwing off the rotor 20.

[0105] Please refer to Figures 3 to 8In the second to seventh embodiments, the cooling structure 40 further includes a first control valve 45, which is connected to the first oil spraying component 41. The first control valve 45 is used to control the first oil spraying component 41 to spray coolant when the rotor 20 is not rotating. Optionally, the first control valve 45 is used to control the on-off of the oil circuit in the first oil spraying component 41 or to control the on-off of the main pipeline connected to the first oil spraying component 41.

[0106] By adopting the above technical solution, the first oil pump 44 or the first control valve 45 can control the first oil injection component 41 to spray coolant when the rotor 20 is not rotating, thereby solving the problem of large loss and low efficiency of the motor 100 caused by oil throwing off the rotor 20.

[0107] In some embodiments, the first control valve 45 is a one-way solenoid valve.

[0108] Please refer to Figure 3 The first control valve 45 is connected to the main oil pipe 46, and the main oil pipe 46 is connected between the oil reservoir 43 and the first oil spraying component 41. In this way, the first control valve 45 can control the on-off of the main oil pipe 46 to control whether the first oil spraying component 41 sprays oil. Since the first control valve 45 is a one-way solenoid valve, the first control valve 45 can make the coolant flow only from the main oil pipe 46 to the first oil spraying component 41, and will not make the coolant flow from the first oil spraying component 41 to the main oil pipe 46; and by setting the one-way solenoid valve, when the motor 100 is running, the one-way solenoid valve is closed, and the first oil spraying component 41 has no oil sprayed to the air gap 101, which solves the problem that the motor 100 is sprayed to the air gap 101, and the rotor 20 is thrown off due to the oil storage during operation, thereby causing large losses and low efficiency.

[0109] In some embodiments, please refer to Figures 3 to 8 The stator 30 is sleeved on the outer side of the rotor 20 , and the cooling structure 40 further includes a second oil spray port 421 , which is used to spray cooling liquid onto the outer surface of the stator 30 .

[0110] Specifically, the cooling structure 40 also includes a second oil spray component 42, which can be connected to the oil storage tank 43. The second oil spray component 42 includes a second oil spray pipe and a second oil spray port 421 arranged at the end of the second oil spray pipe. The second oil spray port 421 is arranged toward the outer surface of the stator 30 to spray coolant toward the outer surface of the stator 30.

[0111] By adopting the above technical solution, the second oil injection port 421 can cool the outer surface of the stator 30. The cooling structure 40 provided in the embodiment of the present application can simultaneously cool the outer surface and the inner surface of the stator 30, as well as the outer surface of the rotor 20, thereby improving the cooling efficiency of the motor 100 as a whole.

[0112] In other embodiments, the second oil injection port 421 may also be connected to a coolant supply device outside the motor 100 .

[0113] Please refer to Figure 1 In the first embodiment, the cooling structure 40 further includes a second oil pump 47 , and the second oil pump 47 is used to pump the coolant in the oil reservoir 43 to the second oil injection port 421 .

[0114] Specifically, the first oil pump 44 is connected to the first oil spray component 41, and the second oil pump 47 is connected to the second oil spray component 42. The second oil pump 47 is used to draw the coolant in the oil reservoir 43 into the second oil spray component 42 and spray it out through the second oil spray port 421. In this way, the oil spraying actions of the first oil spray component 41 and the second oil spray component 42 can be controlled separately. The first oil spray component 41 sprays the coolant when the rotor 20 is not rotating, and the second oil spray port 421 can spray the coolant when the rotor 20 is rotating or when the rotor 20 is not rotating.

[0115] By adopting the above technical solution, the first oil pump 44 and the second oil pump 47 respectively control the oil injection actions of the first oil injection port 411 and the second oil injection port 421 to meet the cooling requirements of the motor 100 in different states.

[0116] Please refer to Figures 3 to 6 In some embodiments, the cooling structure 40 also includes a main oil pipe 46 connected to the oil reservoir 43, and the first oil injection component 41 and the second oil injection component 42 are both connected to the main oil pipe 46; the first oil pump 44 is used to pump the coolant in the oil reservoir 43 to the main oil pipe 46.

[0117] The first oil pump 44 is connected to the main oil pipe 46 , and the first control valve 45 is used to control the on-off of the oil circuit in the first oil injection component 41 .

[0118] In the second to fifth embodiments, the first oil pump 44 is used to draw the coolant in the oil reservoir 43 to the main oil pipe 46, and transmit it to the first oil spray component 41 and the second oil spray component 42 respectively through the main oil pipe 46, wherein the first oil spray component 41 is provided with a first control valve 45, and the first control valve 45 can control the on and off of the first oil spray component 41, so that the first oil spray component 41 sprays coolant only when the rotor 20 is not rotating.

[0119] By adopting the above technical solution, the cooling structure 40 only needs to be provided with one oil pump to pump the coolant in the oil reservoir 43 to the first oil injection port 411 and the second oil injection port 421 , thereby saving the cost of the oil pump.

[0120] Please refer to Figure 7 In some embodiments, the cooling structure 40 further includes a second control valve 48 , and the second control valve 48 is used to control the second oil injection port 421 to spray cooling liquid.

[0121] The first oil pump 44 is used to pump the coolant in the oil reservoir 43 to the main oil pipe 46. The first oil spray component 41 and the second oil spray component 42 are both connected to the main oil pipe 46. The second control valve 48 is arranged on the pipeline of the second oil spray component 42. After the first oil pump 44 pumps the coolant into the main oil pipe 46, the second control valve 48 can control the on-off of the pipeline in the second oil spray component 42, thereby controlling the oil spraying action of the second oil spray port 421. The second control valve 48 can be a one-way solenoid valve or other control switch.

[0122] By providing the second control valve 48 , the cooling structure 40 can control the oil injection action of the second oil injection port 421 to spray the coolant to the stator 30 when the stator 30 needs to be cooled.

[0123] It can be understood that the cooling structure 40 may also include other elements, such as a filter and a heat exchanger. The filter is used to filter the cooling oil pumped out from the oil pump, and the heat exchanger is used to perform heat exchange on the filtered cooling oil to reduce the temperature of the cooling oil.

[0124] The cooling principle of the motor 100 is described below with reference to a specific embodiment.

[0125] Please refer to Figure 1 In the first embodiment, the cooling structure 40 of the motor 100 includes a first oil injection component 41, a second oil injection component 42, a first oil pump 44, a second oil pump 47 and an oil reservoir 43. When the electric drive vehicle is running normally and the electric drive drives torque, the first oil pump 44 is not started, the first oil injection port 411 does not spray oil, and only the second oil injection port 421 sprays oil to the stator 30, which serves the purpose of dissipating heat for the motor 100. When the electric drive is in a working mode such as boost charging and battery heating, the electric drive assembly is stopped, that is, the speed of the rotor 20 is 0rpm, then the first oil pump 44 is started, and the four first oil injection ports 411 of the first oil injection component 41 spray oil at the same time, which has the effect of cooling the stator 30 and the rotor 20 of the motor 100 at the same time, and the cooling effect is better.

[0126] Please refer to Figure 3 In the second embodiment, the cooling structure 40 of the motor 100 includes a first oil injection component 41, a second oil injection component 42, a main oil pipe 46, a first oil pump 44, a first control valve 45 and an oil reservoir 43. The four first oil injection ports 411 of the first oil injection component 41 are simultaneously aimed at the air gap 101. When the motor 100 is in a driving state, the first control valve 45 is closed, and only the second oil injection component 42 sprays oil to the stator 30; when the electric drive assembly stops running and the rotor 20 does not rotate, the first control valve 45 is opened, and the four first oil injection ports 411 of the first oil injection component 41 spray oil at the same time, which has the effect of cooling the stator 30 and the rotor 20 of the motor 100 at the same time, and the cooling effect is better.

[0127] Please refer to Figure 4 , Figure 5 The motor 100 provided in the third and fourth embodiments is similar to the second embodiment, except that the first oil injection component 41 includes two first oil injection ports 411, and when the first control valve 45 is opened, the two first oil injection ports 411 inject oil simultaneously.

[0128] Please refer to Figure 6 , Figure 7 In the fifth and sixth embodiments, the cooling structure 40 of the motor 100 includes a first oil spray component 41, a second oil spray component 42, a main oil pipe 46, a first oil pump 44, a first control valve 45, a second control valve 48 and an oil reservoir 43. When the electric drive assembly is running, the first control valve 45 is closed to ensure that the coolant does not flow into the first oil spray component 41 and does not spray oil into the air gap 101. When the motor 100 is in the boost charging and battery heating working mode, the first control valve 45 is opened and the second control valve 48 is closed, and the coolant flows into the first oil spray component 41 and sprays oil into the air gap 101 for cooling.

[0129] Please refer to Figure 8 The seventh embodiment is similar to the second embodiment, except that the first fuel injection member includes a first fuel distribution pipe 4121 and an annular fuel injection nozzle 4122 .

[0130] An embodiment of the second aspect of the present application provides an electric drive assembly, including the motor 100 provided in the first aspect.

[0131] In some embodiments, the electric drive assembly further includes a controller, the motor 100 is electrically connected to the controller, and the controller is used to control the first oil injection port 411 to spray coolant when the rotor 20 is not rotating. The electric drive assembly may also include a reducer connected to the motor 100.

[0132] The controller is used to control the oil spraying action of the first oil spray port 411, preferably spraying the coolant when the rotor 20 is not rotating, but is not limited to spraying the coolant once the rotor 20 is not rotating, but is controlled according to cooling needs. It can be understood that the controller is also used to control the second oil spray port 421 to spray the coolant.

[0133] By adopting the above technical solution, the controller can control the oil injection action of the first oil injection port 411, thereby solving the problem of large loss and low efficiency caused by oil injection when the rotor 20 rotates.

[0134] An embodiment of the third aspect of the present application provides a power device, comprising the electric drive assembly provided by the second aspect.

[0135] The power device may be an electric tool, an electric bicycle, an electric car, a ship, a spacecraft, etc. Among them, the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0136] 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 replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate 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 motor, characterized in that: include: case; a rotor rotatably disposed in the housing; A stator is disposed in the housing and coaxially arranged with the rotor, with an air gap between the stator and the rotor; The cooling structure comprises a first oil spray port arranged toward the air gap, wherein the first oil spray port is used for spraying cooling liquid into the air gap.

2. The motor according to claim 1, characterized in that: The cooling structure includes at least two of the first oil injection ports, and the at least two of the first oil injection ports are respectively arranged at two ends of the rotor along a first direction, and the first direction is parallel to the axial direction of the rotor.

3. The motor according to claim 2, characterized in that: At least one of the first oil injection ports is disposed on one side of the rotor along a second direction, and at least one of the first oil injection ports is disposed on the other side of the rotor along the second direction, and the second direction is parallel to the radial direction of the rotor.

4. The motor according to claim 2, characterized in that: The cooling structure includes at least two first oil separators, which are respectively arranged at two ends of the rotor along the first direction, and the first oil injection port is arranged on the first oil separator.

5. The motor according to claim 4, characterized in that: The first oil distribution member includes a first oil distribution pipe and an oil spray nozzle connected to the first oil distribution pipe, the oil spray nozzle is opposite to the air gap, and the first oil spray port is arranged on the oil spray nozzle.

6. The motor according to claim 5, characterized in that: The plurality of first oil injection ports are arranged at intervals along the oil injection nozzle, and the plurality of first oil injection ports are arranged along a circumferential direction of the air gap.

7. The motor according to any one of claims 1 to 6, characterized in that: The cooling structure further includes an oil reservoir and a first oil pump disposed in the housing. The oil reservoir is used to store coolant, and the first oil pump is used to pump the coolant in the oil reservoir to the first oil injection port.

8. The motor according to claim 7, characterized in that: The first oil pump is used to pump coolant when the rotor is not rotating, and / or, The cooling structure further includes a first control valve, and the first control valve is used to control the first oil injection port to spray cooling liquid when the rotor is in a non-rotating state.

9. The motor according to claim 8, characterized in that: The first control valve is a one-way solenoid valve.

10. The motor according to claim 7, characterized in that: The stator is sleeved on the outer side of the rotor, and the cooling structure further includes a second oil spray port, which is used to spray cooling liquid onto the outer surface of the stator.

11. The motor according to claim 10, characterized in that: The cooling structure further includes a second oil pump, and the second oil pump is used to pump the coolant in the oil reservoir to the second oil injection port.

12. The motor according to claim 10, characterized in that: The cooling structure further comprises a main oil pipe connected to the oil reservoir, and the first oil injection port and the second oil injection port are both connected to the main oil pipe; The first oil pump is used to pump the coolant in the oil reservoir to the main oil pipe.

13. The motor according to claim 10, characterized in that: The cooling structure further includes a second control valve, and the second control valve is used for controlling the second oil injection port to spray cooling liquid.

14. An electric drive assembly, characterized in that: Comprising the motor as claimed in any one of claims 1-13.

15. The electric drive assembly according to claim 14, characterized in that: The electric drive assembly further includes a controller, the motor is electrically connected to the controller, and the controller is used to control the first oil spray port to spray coolant when the rotor is in a non-rotating state.

16. A power device, characterized in that: Comprising the electric drive assembly as claimed in claim 14 or 15.

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