Motor, power assembly and electric equipment

Abstract

The utility model is suitable for the technical field of motors, and provides a motor, a power assembly and electric equipment, the electric equipment comprises the power assembly, and the power assembly comprises the motor. The motor comprises a shell assembly, a motor shaft and a conductive piece. The motor shaft can be rotationally arranged on the shell assembly, and a mounting groove is formed in one end of the motor shaft in the axial direction. At least part of the conductive piece is located in the mounting groove. In the axial direction of the motor shaft, the two opposite ends of the conductive piece abut against the motor shaft and the shell assembly respectively. At least part of the conductive part is located in the mounting groove, so that at least part of the conductive part is located in the motor shaft, the axial space outside the end of the motor shaft is not occupied as much as possible, the integration degree of the motor shaft and the conductive part in the axial direction is improved, the axial size of the motor is reduced, and the compactness of the motor is improved.

Description

Technical Field

[0001] The present application belongs to the field of motor technology, and more specifically, relates to a motor, a powertrain and an electric device. Background Art

[0002] In the related art, the rotor of the motor will generate a potential difference (i.e., common mode voltage) to the ground during rotation. This potential difference will accumulate between the inner and outer rings of the bearing, causing capacitive charging and discharging of the inner and outer rings of the bearing.

[0003] In some cases, a carbon rod is connected between the axial end of the motor shaft and the housing assembly of the motor, so that the voltage of the motor shaft can be introduced into the housing assembly through the carbon rod to achieve a grounding effect on the motor shaft, thereby balancing the voltage between the inner and outer rings of the bearing. However, such a setting increases the axial size of the motor, which is not conducive to realizing a miniaturized design of the motor. Utility Model Content

[0004] In view of the above problems, the embodiments of the present application provide a motor, a power assembly and an electric device, which can improve the technical problem of the large axial size of the motor.

[0005] In a first aspect, an embodiment of the present application provides a motor, comprising:

[0006] Shell assembly;

[0007] The motor shaft is rotatably disposed on the housing assembly, and a mounting groove is provided at one end of the motor shaft along the axial direction;

[0008] The conductive member is at least partially located in the mounting groove; in the axial direction of the motor shaft, opposite ends of the conductive member abut against the motor shaft and the housing assembly respectively.

[0009] The motor provided in the embodiment of the present application is provided with a mounting groove at one end of the motor shaft along the axial direction, and at least a portion of the conductive member is located in the mounting groove, and in the axial direction of the motor shaft, the opposite ends of the conductive member are respectively against the motor shaft and the housing assembly, so that the motor shaft, the conductive member and the housing assembly are sequentially connected, and the conductive member can introduce the voltage of the motor shaft into the housing assembly, thereby achieving voltage balance between the motor shaft and the housing assembly. At least a portion of the conductive member is located in the mounting groove, so that at least a portion of the conductive member is located in the motor shaft, so as not to occupy the axial space outside the end of the motor shaft as much as possible, thereby helping to improve the integration of the motor shaft and the conductive member in the axial direction, reduce the axial size of the motor, and improve the compactness of the motor.

[0010] In some embodiments, in the axial direction of the motor shaft, opposite ends of the conductive member elastically abut against the motor shaft and the housing assembly respectively.

[0011] In some embodiments, the conductive member includes a carbon rod and an elastic member;

[0012] In the axial direction of the motor shaft, one end of the carbon rod abuts against the motor shaft, and at least part of the elastic member elastically abuts against the other end of the carbon rod and the shell assembly; or, in the axial direction of the motor shaft, one end of the carbon rod abuts against the shell assembly, and at least part of the elastic member elastically abuts against the other end of the carbon rod and the motor shaft.

[0013] In some embodiments, the motor also includes a bearing, the inner ring of the bearing is sleeved on the outer periphery of the motor shaft and fixed to the motor shaft; the outer ring of the bearing is fixed to the housing assembly, and at least part of the conductive member overlaps with the bearing in the axial direction of the motor shaft.

[0014] In some embodiments, the motor also includes a rotor, which is sleeved on the outer circumference of the motor shaft and fixed to the motor shaft; there are multiple bearings, which are respectively distributed on opposite sides of the rotor along the axial direction of the motor shaft; at least a portion of the conductive member overlaps with at least one bearing on one side of the rotor in the axial direction of the motor shaft.

[0015] In some embodiments, the motor further comprises:

[0016] The resolver rotor is sleeved on the outer circumference of the motor shaft and fixed to the motor shaft;

[0017] The resolver stator is sleeved on the outer periphery of the resolver rotor and fixed to the housing assembly;

[0018] The resolver rotor and the resolver stator are overlapped in the axial direction of the motor shaft, and at least a portion of the conductive member is overlapped with the resolver rotor in the axial direction of the motor shaft.

[0019] In some embodiments, the outer circumferential wall of the conductive member and the inner circumferential wall of the mounting groove are spaced apart in the radial direction of the motor shaft.

[0020] In some embodiments, an annular groove is provided on the inner peripheral wall of the mounting groove.

[0021] In some embodiments, the housing assembly includes:

[0022] A housing, wherein the motor shaft is rotatably disposed on the housing;

[0023] The fixing piece is arranged on the casing and abuts against the conductive piece.

[0024] In some embodiments, the motor shaft includes a rotating shaft and an adapter, and the rotating shaft is rotatably disposed on the housing assembly; in the axial direction of the motor shaft, at least a portion of the adapter is disposed at one end of the rotating shaft, and the mounting groove is disposed at an end of the adapter away from the rotating shaft;

[0025] The rotating shaft and the adapter are integrally arranged, or the rotating shaft and the adapter are separately connected.

[0026] In some embodiments, the motor further includes a conductive ring, which is sleeved on the outer circumference of the motor shaft; in the radial direction of the motor shaft, the conductive ring is located between the motor shaft and the housing assembly, and abuts against the motor shaft and the housing assembly.

[0027] In some embodiments, in a radial direction of the motor shaft, the conductive ring elastically abuts against the motor shaft and the housing assembly.

[0028] In some embodiments, the conductive ring is a conductive structure and includes at least one of an oil seal and a brush.

[0029] In some embodiments, the motor further comprises a bearing, the bearing comprising:

[0030] The inner ring is sleeved on the outer circumference of the motor shaft and fixed to the motor shaft;

[0031] The outer ring is sleeved on the outer circumference of the inner ring and fixed to the housing assembly;

[0032] Rollers are rollably disposed between the inner ring and the outer ring;

[0033] Wherein, the roller is an insulating structure, and / or the outer peripheral wall of the outer ring is provided with a first insulating layer, and / or the inner peripheral wall of the inner ring is provided with a second insulating layer.

[0034] In a second aspect, an embodiment of the present application provides a powertrain, including a motor.

[0035] The powertrain provided in the embodiment of the present application, by adopting the above-mentioned motor, can achieve voltage balance between the motor shaft and the housing assembly, that is, the motor shaft is grounded through the housing assembly, thereby improving the axial integration of the motor shaft and the conductive parts and reducing the axial size of the motor to improve the compactness of the motor, thereby improving the integration of the powertrain and reducing the axial size of the powertrain.

[0036] In a third aspect, an embodiment of the present application provides an electric device, including a motor or a powertrain.

[0037] The electric device provided in the embodiment of the present application, by adopting the above-mentioned motor or power assembly, can achieve voltage balance between the motor shaft and the housing assembly, that is, on the basis of the motor shaft being grounded through the housing assembly, when the internal space of the electric device is predetermined, the integration of the electric device can be improved to reduce the axial size of the electric device; when the volume of the electric device is predetermined, the integration of the electric device can be improved to increase the internal space of the electric device.

[0038] 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

[0039] 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 the description of the prior art 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.

[0040] Figure 1 A schematic diagram of a vehicle provided for some embodiments of the present application;

[0041] Figure 2 A partial cross-sectional view of a motor provided in some embodiments of the present application;

[0042] Figure 3 Schematic diagram of a motor provided for some other embodiments of the present application;

[0043] Figure 4 A partial cross-sectional view of a motor provided in some other embodiments of the present application;

[0044] Figure 5 A cross-sectional view of a conductive member of a motor provided in some embodiments of the present application;

[0045] Figure 6 A cross-sectional view of an adapter of a motor provided in some embodiments of the present application;

[0046] Figure 7 A partial cross-sectional view of a motor provided in some further embodiments of the present application;

[0047] Figure 8 A cross-sectional view of a bearing of a motor provided in some embodiments of the present application;

[0048] Fig. 9 A cross-sectional view of a bearing of a motor provided in some other embodiments of the present application;

[0049] Fig.10 A cross-sectional view of a bearing of a motor provided in some further embodiments of the present application.

[0050] Among them, the reference numerals in the figure are:

[0051] 1000-powertrain; 2000-body; 100-motor; 200-battery; 300-controller; 400-gearbox; 10-rotor; 20-stator; 30-motor shaft; 301-mounting slot; 302-annular slot; 31-rotating shaft; 32-adapter; 40-housing assembly; 41-casing; 42-fixing part; 50-conductive part; 51-carbon rod; 52-elastic part; 60-bearing; 61-inner ring; 62-outer ring; 63-roller; 64-first insulating layer; 65-second insulating layer; 70-revolving rotor; 80-revolving stator; 90-conductive ring; X-axial; Y-radial. DETAILED DESCRIPTION

[0052] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0053] In the description of the present application, 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 drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0055] In the description of the present application, "plurality" means more than two, and unless otherwise clearly and specifically defined, "more than two" includes two. Accordingly, "multiple groups" means more than two groups, including two groups.

[0056] In the description of this application, unless otherwise clearly specified and limited, the terms "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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0057] In the description of this application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists, A and B exist at the same time, and B exists. In addition, in this application, the character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0058] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0059] In the related art, the rotor of the motor will generate a potential difference (i.e., common mode voltage) to the ground during rotation, and this potential difference will accumulate between the inner and outer rings of the bearing, causing capacitive charging and discharging of the inner and outer rings of the bearing. When the potential difference is too large, the capacitor at the bearing will leak current or discharge after being fully charged, which will damage the bearing and affect the operation and service life of the motor.

[0060] In some cases, a carbon rod is connected between the axial end of the motor shaft and the housing assembly of the motor, so that the voltage of the motor shaft can be introduced into the housing assembly through the carbon rod to ground the motor shaft and balance the voltage between the inner ring and the outer ring of the bearing. However, such a setting increases the axial size of the motor.

[0061] Based on the above considerations, the embodiment of the present application provides a motor, a power assembly and an electric device, wherein a mounting groove is provided at one end of the motor shaft along the axial direction, at least a portion of the conductive member is located in the mounting groove, and in the axial direction of the motor shaft, the opposite ends of the conductive member are respectively against the motor shaft and the housing assembly, so that the conductive member can introduce the voltage of the motor shaft into the housing assembly, thereby achieving a voltage balance between the motor shaft and the housing assembly, so that the motor shaft can be grounded through the housing assembly. In this way, when the motor shaft and the housing assembly are provided with bearings, the voltage between the inner ring and the outer ring of the bearing can be balanced to reduce the potential difference. In addition, by at least a portion of the conductive member being located in the mounting groove, at least a portion of the conductive member is arranged in the motor shaft, so as not to occupy the axial space of the end of the motor shaft as much as possible, thereby helping to improve the integration of the motor shaft and the conductive member in the axial direction, reducing the axial size of the motor, and improving the compactness of the motor.

[0062] It should be noted that the motor is also called an electric motor. The motor is generally composed of two parts: the rotor and the stator. The motor is a device that converts electrical energy into mechanical energy. Specifically, the motor uses the energized coil of the stator to generate a rotating magnetic field and act on the rotor to form a magnetic electrodynamic rotation torque. The fixed part of the motor is called the stator; and the rotating part of the motor is called the rotor.

[0063] Among them, the motor can be divided into radial motor and axial motor. A radial motor is a motor in which the stator and the rotor are arranged radially. For example, the stator is located on the outer periphery of the rotor, that is, the stator is sleeved on the outer periphery of the rotor; or, the rotor is located on the outer periphery of the stator, that is, the rotor is sleeved on the outer periphery of the stator. An axial motor is a motor in which the stator and the rotor are arranged axially.

[0064] The motor mentioned in the embodiment of the present application can be applied to a powertrain as a power source; it can also be applied to an electric device as a power source. The powertrain mentioned in the embodiment of the present application can also be applied to an electric device as a power source.

[0065] The electric device may be, but is not limited to, an electric toy, an electric tool, an electric bicycle, an electric motorcycle, a ship, a spacecraft, etc. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0066] The electric equipment can also be a vehicle or a vehicle chassis. According to the power source, the vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle. According to the driving mode, the vehicle can be a front-wheel drive vehicle, a rear-wheel drive vehicle or a four-wheel drive vehicle.

[0067] Among them, the motor can be integrated with one or more of the devices such as the battery, the controller, the gearbox, etc. to form a powertrain.

[0068] For the convenience of explanation, some embodiments of the present application are described using the electric device as a vehicle as an example.

[0069] See also Figure 1 , Figure 1 Schematic diagram of a vehicle provided for some embodiments of the present application. The above-mentioned power assembly 1000 is arranged inside the vehicle, and the power assembly 1000 can be arranged at the bottom, head or tail of the vehicle to provide power for the vehicle. Specifically, the vehicle can include a vehicle body 2000 and the power assembly 1000.

[0070] The vehicle body 2000 is the main supporting component of the vehicle, and the vehicle body has an engine room and a driver's cabin. The engine room is used to accommodate the powertrain 1000 of the vehicle, etc., and the driver's cabin is used to provide operating space and riding space for the driver and passengers. When the vehicle is a front-wheel drive vehicle, the engine room is arranged at the head of the vehicle body 2000, that is, the engine room is a front engine room. When the vehicle is a rear-wheel drive vehicle, the engine room is arranged at the rear of the vehicle body 2000, that is, the engine room is a rear engine room. When the vehicle is a four-wheel drive vehicle, the engine room is divided into a front engine room and a rear engine room, the front engine room is arranged at the head of the vehicle body 2000, and the rear engine room is arranged at the rear of the vehicle body 2000. The driver's cabin is arranged between the head and the rear of the vehicle body 2000.

[0071] The powertrain 1000 is the power system of the vehicle, that is, the electric drive system of the vehicle. The powertrain 1000 is used to convert electrical energy into mechanical energy to drive the vehicle to start, navigate, drive, and meet the working power requirements during driving. The powertrain 1000 is arranged on the vehicle body 2000. Specifically, a part of the powertrain 1000 can be arranged in the cabin, and another part of the powertrain 1000 can be arranged at the bottom of the vehicle body 2000.

[0072] In some embodiments, the power assembly 1000 may include a motor 100, and the motor 100 is used as a power source of the power assembly 1000. It can be understood that the power assembly 1000 is not limited to being used in vehicles, but can also be used in other electric devices that require power output.

[0073] In some embodiments, the powertrain 1000 may further include a controller 300, which is used to control the operation of the powertrain 1000. Specifically, the controller 300 is used to convert direct current into alternating current and output the alternating current to the motor 100 to control the operation of the motor 100, thereby achieving driving control of the vehicle. For example, the controller 300 can control the start, speed change and stop of the motor 100 to drive the vehicle to start, change speed and stop.

[0074] In some embodiments, the powertrain 1000 may further include a battery 200, and the controller 300 may further be used to control the battery 200 to supply power to the motor 100, such as for starting, navigating, and driving the vehicle. Specifically, the controller 300 is electrically connected to the battery 200, and the controller 300 is used to convert the direct current provided by the battery 200 into alternating current, and output the alternating current to the motor 100.

[0075] The controller 300 can also be used to convert AC power into DC power. For example, when the vehicle recovers kinetic energy, the motor 100 can convert the mechanical energy that drives it to rotate into AC power, and the controller 300 can convert the AC power into DC power and charge it back into the battery 200.

[0076] In some embodiments, the powertrain 1000 may further include a gearbox 400, which is connected to the motor 100 to achieve torque change of the motor 100. The gearbox 400 is a mechanism for changing the speed and torque from the engine, and it can change the output shaft and input shaft transmission ratio in a fixed or step-by-step manner.

[0077] In some embodiments, the controller 300 may be integrated with the motor 100 to form a powertrain 1000. The battery 200 may also be integrated with the motor 100 to form a powertrain 1000. The gearbox 400, the controller 300 and the motor 100 may also be integrated to form a powertrain 1000. The gearbox 400, the controller 300, the battery 200 and the motor 100 may also be integrated to form a powertrain 1000. Of course, in some embodiments, the powertrain 1000 may also be integrated with other structures, such as a cooling oil circuit.

[0078] Please also read Figure 2 and Figure 3 , Figure 2 A partial cross-sectional view of a motor 100 provided in some embodiments of the present application, Figure 3 Schematic diagram of a motor 100 provided in some other embodiments of the present application. The motor 100 provided in the embodiment of the present application includes a rotor 10, a stator 20 and a motor shaft 30.

[0079] The motor shaft 30 refers to a shaft-shaped structure used to output power in the motor 100. The rotor 10 is sleeved on the outer circumference of the motor shaft 30 and is fixedly connected to the motor shaft 30, so that the motor shaft 30 can rotate under the drive of the rotor 10 to output power.

[0080] The stator 20 and the motor shaft 30 can rotate relative to each other, thereby enabling the stator 20 and the rotor 10 to rotate relative to each other. For example, in some embodiments, the stator 20 can be supported on the motor shaft 30 by a bearing. In some embodiments, when the motor 100 includes a housing assembly 40 described below, the stator 20 can be fixed to the housing assembly 40, and the stator 20 can be supported by the housing assembly 40, while the rotor 10 and the motor shaft 30 are rotatably mounted on the housing assembly 40, so that the stator 20 and the rotor 10 can rotate relative to each other, so that the stator 20 drives the rotor 10 to rotate.

[0081] When the energized coil on the stator 20 is energized, a magnetic field can be generated and act on the rotor 10 to form a magneto-electrodynamic rotational torque, thereby realizing the rotation of the rotor 10, and then driving the motor shaft 30 to rotate together, so as to output power through the motor shaft 30.

[0082] In some embodiments, Figure 2As shown, the rotor 10 and the stator 20 are sequentially distributed along the radial direction Y. Specifically, the stator 20 is sleeved on the outer circumference of the rotor 10 , and the rotor 10 can rotate relative to the stator 20 .

[0083] In other embodiments, Figure 3 As shown, the rotor 10 and the stator 20 are sequentially distributed along the axial direction X, so that the rotor 10 is located on the side of the stator 20 along the axial direction X, so that the stator 20 drives the rotor 10 to rotate, thereby driving the motor shaft 30 to rotate.

[0084] It should be noted that the axial direction X refers to the axial direction X of the motor 100, that is, the axial direction X of the motor shaft 30, that is, the direction of the central axis of the motor shaft 30. The radial direction Y refers to the radial direction Y of the motor 100, that is, the radial direction Y of the motor shaft 30, that is, the radial direction of the motor shaft 30. In the description of the motor 100 above and below, the axial direction X and radial direction Y involved have the same meaning as above, and unless otherwise specified, they all refer to the axial direction X and radial direction Y of the motor 100.

[0085] See also Figure 4 , and combined with other drawings. Among them, Figure 4 A partial cross-sectional view of a motor 100 provided in some other embodiments of the present application. The motor 100 provided in the embodiment of the present application includes a housing assembly 40, a motor shaft 30 and a conductive member 50. The motor shaft 30 is rotatably disposed in the housing assembly 40. In the axial direction X, one end of the motor shaft 30 is provided with a mounting groove 301. At least a portion of the conductive member 50 is located in the mounting groove 301. In the axial direction X, the opposite ends of the conductive member 50 are respectively against the motor shaft 30 and the housing assembly 40.

[0086] The housing assembly 40 refers to the housing structure of the motor 100 and is used to install the motor shaft 30 , the stator 20 , the rotor 10 and the like of the motor 100 .

[0087] The mounting groove 301 is a groove for mounting the conductive member 50 .

[0088] The conductive member 50 refers to a component having a conductive function, wherein the conductive member 50 may be, but is not limited to, a carbon rod 51 .

[0089] At least part of the conductive member 50 is located in the mounting groove 301, and the conductive member 50 may be completely located in the mounting groove 301; or, in the axial direction X, part of the conductive member 50 is located in the mounting groove 301, and another part of the conductive member 50 is located outside the mounting groove 301, specifically outside the end of the motor shaft 30 along the axial direction X.

[0090] like Figure 4As shown, in the axial direction X, one end of the installation slot 301 has a slot opening, and the other end has a slot bottom. In the axial direction X, one end of the conductive member 50 abuts against the motor shaft 30, specifically against the slot bottom of the installation slot 301; the other end of the conductive member 50 abuts against the housing assembly 40, specifically, the conductive member 50 and the housing assembly 40 abut against each other at the slot opening.

[0091] The battery 200 monomer provided in the embodiment of the present application is provided with a mounting groove 301 at one end of the motor shaft 30 along the axial direction X, at least part of the conductive member 50 is located in the mounting groove 301, and on the axial direction X of the motor shaft 30, the opposite ends of the conductive member 50 are respectively against the motor shaft 30 and the housing assembly 40, so that the motor shaft 30, the conductive member 50 and the housing assembly 40 are sequentially connected, and the conductive member 50 can introduce the voltage of the motor shaft 30 into the housing assembly 40, thereby achieving voltage balance between the motor shaft 30 and the housing assembly 40. In addition, the motor shaft 30 can be grounded through the housing assembly 40. In this way, when a bearing 60 is provided between the motor shaft 30 and the housing assembly 40, the voltage balance between the motor shaft 30 and the housing assembly 40 can achieve voltage balance between the inner ring 61 and the outer ring 62 of the bearing 60, so as to reduce the potential difference between the inner ring 61 and the outer ring 62 of the bearing 60, thereby improving the problem of electrical corrosion of the bearing 60. Furthermore, by at least partially positioning the conductive member 50 in the mounting groove 301, at least partially positioning the conductive member 50 in the motor shaft 30, so as to occupy as little axial X space outside the end of the motor shaft 30 as possible, thereby helping to improve the integration of the motor shaft 30 and the conductive member 50 in the axial X direction, reduce the axial X dimension of the motor 100, and improve the compactness of the motor 100.

[0092] In some embodiments, see Figure 4 In the axial direction X of the motor shaft 30 , opposite ends of the conductive member 50 elastically abut against the motor shaft 30 and the housing assembly 40 , respectively.

[0093] It can be understood that the conductive member 50 has elastic properties, so that in the axial direction X of the motor shaft 30 , one end of the conductive member 50 elastically abuts against the motor shaft 30 , and the other end of the conductive member 50 elastically abuts against the housing assembly 40 .

[0094] Such arrangement enables the conductive member 50 to be firmly pressed against the motor shaft 30 and the housing assembly 40 along the axial direction X, so that the voltage of the motor shaft 30 can be stably introduced into the housing assembly 40 through the conductive member 50, thereby achieving voltage balance between the motor shaft 30 and the housing assembly 40, and further achieving voltage balance between the inner ring 61 and the outer ring 62 of the bearing 60.

[0095] In some embodiments, please refer to Figure 4 and Figure 5 , and combined with other drawings. Among them, Figure 5 The cross-sectional view of the conductive member 50 provided in some embodiments of the present application. The conductive member 50 includes a carbon rod 51 and an elastic member 52.

[0096] It should be noted that the carbon rod 51 can be made of conductive components such as silver carbon, copper carbon, and pure carbon, that is, the carbon rod 51 can be made by mixing at least one of silver carbon powder, copper carbon powder, and pure carbon powder and then undergoing powder metallurgy.

[0097] The elastic member 52 may be, but is not limited to, a spring or a spring sheet. The elastic member 52 is a conductive structure.

[0098] Among some possible designs, such as Figure 4 and Figure 5 As shown, in the axial direction X of the motor shaft 30 , one end of the carbon rod 51 abuts against the motor shaft 30 , and at least part of the elastic member 52 elastically abuts against the other end of the carbon rod 51 and the housing assembly 40 .

[0099] Such arrangement enables the motor shaft 30 to be connected to the housing assembly 40 through the carbon rod 51 and the elastic member 52 in sequence, and the voltage of the motor shaft 30 can be introduced into the housing assembly 40 through the carbon rod 51 and the elastic member 52 in sequence, thereby achieving voltage balance between the motor shaft 30 and the housing assembly 40, and then achieving voltage balance between the inner ring 61 and the outer ring 62 of the bearing 60, so as to improve the problem of electrical corrosion of the bearing 60. In addition, the arrangement of the carbon rod 51 and the elastic member 52 enables the conductive member 50 to elastically abut against the housing assembly 40 and the motor shaft 30 along the axial direction X, thereby improving the reliability of the voltage balance between the motor shaft 30 and the housing assembly 40.

[0100] Alternatively, in some other possible designs, in the axial direction X of the motor shaft 30 , one end of the carbon rod 51 abuts against the housing assembly 40 , and at least part of the elastic member 52 elastically abuts against the other end of the carbon rod 51 and the motor shaft 30 .

[0101] Such arrangement enables the motor shaft 30 to be connected to the housing assembly 40 through the elastic member 52 and the carbon rod 51 in sequence, and the voltage of the motor shaft 30 can be introduced into the housing assembly 40 through the elastic member 52 and the carbon rod 51 in sequence, thereby achieving voltage balance between the motor shaft 30 and the housing assembly 40, and then achieving voltage balance between the inner ring 61 and the outer ring 62 of the bearing 60, so as to improve the problem of electrical corrosion of the bearing 60. In addition, the arrangement of the carbon rod 51 and the elastic member 52 enables the conductive member 50 to elastically abut against the housing assembly 40 and the motor shaft 30 along the axial direction X, thereby improving the reliability of the voltage balance between the motor shaft 30 and the housing assembly 40.

[0102] At least a portion of the carbon rod 51 may be disposed in the elastic member 52 , thereby improving the connection reliability between the carbon rod 51 and the elastic member 52 .

[0103] In some embodiments, see Figure 4 , and in combination with other drawings. The motor 100 further includes a bearing 60. An inner ring 61 of the bearing 60 is sleeved on the outer periphery of the motor shaft 30 and fixed to the motor shaft 30. An outer ring 62 of the bearing 60 is fixed to the housing assembly 40. At least a portion of the conductive member 50 overlaps with the bearing 60 in the axial direction X of the motor shaft 30.

[0104] The bearing 60 includes rollers 63 and the inner ring 61 and the outer ring 62. The outer ring 62 is sleeved on the outer circumference of the inner ring 61 and fixed to the housing assembly 40. The inner ring 61 is sleeved on the outer circumference of the motor shaft 30 and fixed to the motor shaft 30. The rollers 63 can be movably arranged between the inner ring 61 and the outer ring 62. Based on this, during the rotation of the motor shaft 30, the inner ring 61 can rotate with the motor shaft 30 so that the inner ring 61 rotates relative to the outer ring 62. Moreover, during the rotation of the inner ring 61 relative to the outer ring 62, the rollers 63 adaptively move between the inner ring 61 and the outer ring 62 so that the inner ring 61 can smoothly rotate relative to the outer ring 62, and the rollers 63 can achieve a supporting effect between the inner ring 61 and the outer ring 62. Such an arrangement can improve the rotation stability of the motor shaft 30.

[0105] The two opposite ends of the conductive member 50 along the axial direction X are respectively against the motor shaft 30 and the housing assembly 40, so that the voltage of the motor shaft 30 can be introduced into the housing assembly 40 through the conductive member 50, and the voltage balance between the housing assembly 40 and the motor shaft 30 is achieved. In this way, the voltage balance between the outer ring 62 and the inner ring 61 of the bearing 60 can be achieved, and grounding can be achieved through the housing assembly 40, thereby improving the electrical corrosion problem of the bearing 60.

[0106] At least part of the conductive member 50 is overlapped with the bearing 60 in the axial direction X of the motor shaft 30 , which means that at least part of the axial direction X position of the conductive member 50 overlaps with the axial direction X position of the bearing 60 .

[0107] Such arrangement allows at least a portion of the conductive member 50 to be installed in the motor shaft 30 without extending the axial X dimension of the motor shaft 30, so that the conductive member 50 can occupy as little axial X space outside the end of the motor shaft 30 as possible, thereby helping to improve the integration of the motor shaft 30 and the conductive member 50 in the axial X direction, reduce the axial X dimension of the motor 100, and improve the compactness of the motor 100.

[0108] In some embodiments, see Figure 4, and in combination with other drawings. The motor 100 further includes a rotor 10, which is sleeved on the outer periphery of the motor shaft 30 and fixed to the motor shaft 30. There are multiple bearings 60, which are respectively distributed on opposite sides of the rotor 10 along the axial direction X of the motor shaft 30. At least part of the conductive member 50 overlaps with at least one bearing 60 on one side of the rotor 10 in the axial direction X of the motor shaft 30.

[0109] It can be understood that, in the axial direction X, at least one bearing 60 is provided on one side of the rotor 10, and at least one bearing 60 is also provided on the other side of the rotor 10. As an example, Figure 4 As shown, a bearing 60 is provided on one side of the rotor 10, and a bearing 60 is provided on the other side of the rotor 10. In this way, the bearings 60 distributed on the opposite sides of the rotor 10 can make the rotor 10 and the motor shaft 30 relatively stable during the rotation process.

[0110] At least part of the conductive member 50 overlaps with at least one bearing 60 on one side of the rotor 10 in the axial direction X, which means that at least part of the axial direction X position of the conductive member 50 overlaps with the axial direction X position of at least one bearing 60 on one side of the rotor 10. As an example, Figure 4 As shown, in the axial direction X, a bearing 60 is respectively provided on two opposite sides of the rotor 10 , and at least a portion of the conductive member 50 overlaps with one of the bearings 60 in the axial direction X.

[0111] Such arrangement enables the plurality of bearings 60 to improve the rotation stability of the rotor 10 and the motor shaft 30. Furthermore, the conductive member 50 can occupy as little axial X space outside the end of the motor shaft 30 as possible, thereby helping to improve the integration of the motor shaft 30 and the conductive member 50 in the axial X direction, reducing the axial X dimension of the motor 100, and improving the compactness of the motor 100.

[0112] In some embodiments, see Figure 4 , and in combination with other drawings. The motor 100 also includes a resolver rotor 70 and a resolver stator 80. The resolver rotor 70 is sleeved on the outer periphery of the motor shaft 30 and fixed to the motor shaft 30. The resolver stator 80 is sleeved on the outer periphery of the resolver rotor 70 and fixed to the housing assembly 40. The resolver rotor 70 and the resolver stator 80 overlap in the axial direction X of the motor shaft 30, and at least part of the conductive member 50 overlaps with the resolver rotor 70 in the axial direction X of the motor shaft 30.

[0113] The resolver rotor 70 is sleeved on the outer circumference of the motor shaft 30 and fixed to the motor shaft 30 , and the resolver stator 80 is sleeved on the outer circumference of the resolver rotor 70 and fixed to the housing assembly 40 , so that the resolver rotor 70 can rotate relative to the resolver stator 80 .

[0114] The resolver rotor 70 and the resolver stator 80 overlap in the axial direction X of the motor shaft 30 , which means that the axial position X of the resolver rotor 70 overlaps with the axial position X of the resolver stator 80 .

[0115] At least part of the conductive member 50 overlaps with the resolver rotor 70 in the axial direction X of the motor shaft 30, which means that at least part of the axial X position of the conductive member 50 overlaps with the axial X position of the resolver rotor 70. Accordingly, at least part of the conductive member 50 overlaps with the resolver stator 80 in the axial direction X.

[0116] Such arrangement allows at least a portion of the conductive member 50 to be installed in the motor shaft 30 without extending the axial X dimension of the motor shaft 30, so that the conductive member 50 can occupy as little axial X space outside the end of the motor shaft 30 as possible, thereby helping to improve the integration of the motor shaft 30 and the conductive member 50 in the axial X direction, reduce the axial X dimension of the motor 100, and improve the compactness of the motor 100.

[0117] In some embodiments, see Figure 4 The outer circumferential wall of the conductive member 50 and the inner circumferential wall of the mounting groove 301 are spaced apart along the radial direction Y of the motor shaft 30 .

[0118] The outer peripheral wall of the conductive member 50 refers to the outer wall of the conductive member 50 along the circumferential direction. Correspondingly, the inner peripheral wall of the mounting groove 301 refers to the inner wall of the mounting groove 301 along the circumferential direction.

[0119] The circumferential direction refers to the circumferential direction, and specifically may be the circumferential direction of the motor shaft 30. The circumferential direction is perpendicular to the axial direction X.

[0120] By distributing the outer circumferential wall of the conductive member 50 and the inner circumferential wall of the mounting groove 301 at intervals along the radial direction Y, the friction between the conductive member 50 and the motor shaft 30 can be reduced, that is, the problem of the motor shaft 30 being difficult to rotate relative to the housing assembly 40 due to excessive friction between the conductive member 50 and the motor shaft 30 and between the conductive member 50 and the housing assembly 40 can be improved, thereby facilitating the improvement of the rotational flexibility of the motor shaft 30 and facilitating the improvement of the stability of the conductive member 50 at its two opposite ends along the axial direction X against the motor shaft 30 and the housing assembly 40, respectively.

[0121] In some embodiments, please refer to Figure 4 and Figure 6 , and combined with other drawings. Among them, Figure 6 The cross-sectional view of the adapter 32 of the motor shaft 30 provided in some embodiments of the present application. An annular groove 302 is provided on the inner peripheral wall of the mounting groove 301 .

[0122] The axial direction X of the annular groove 302 is parallel to or coincides with the axial direction X of the motor shaft 30 .

[0123] It should be noted here that when the conductive member 50 includes a carbon rod 51, the relative friction between the carbon rod 51 and the motor shaft 30 will cause carbon powder to be generated by the carbon rod 51. By setting an annular groove 302 on the inner circumferential wall of the mounting groove 301, during the rotation of the motor shaft 30, the carbon powder will be thrown into the annular groove 302 as the motor shaft 30 rotates, that is, the annular groove 302 can effectively collect the carbon powder generated by the friction of the carbon rod 51, thereby improving the problem that the carbon powder enters the motor shaft 30 and the housing assembly 40, the inside of the bearing 60, etc., and affects the rotation of the motor shaft 30, thereby providing a clean working environment for the operation of the motor 100, so that the motor 100 can be operated stably and flexibly.

[0124] In some embodiments, please refer to Figure 4 and Figure 6 , and in combination with other drawings. The number of the annular grooves 302 is multiple, and the multiple annular grooves 302 are distributed along the axial direction X at intervals.

[0125] Such a configuration helps to improve the collection of carbon powder by the annular groove 302 , thereby further improving the operational flexibility and stability of the motor 100 .

[0126] In some embodiments, see Figure 4 , and in combination with other drawings. The housing assembly 40 includes a housing 41 and a fixing member 42. The motor shaft 30 is rotatably disposed on the housing 41. The fixing member 42 is disposed on the housing 41 and abuts against the conductive member 50.

[0127] The fixing member 42 refers to a component disposed on the housing 41 for abutting against the conductive member 50 , and the fixing member 42 is a conductive structure.

[0128] As an example, the fixing member 42 is a nut.

[0129] By fixing the fixing member 42 on the housing 41 to abut against the conductive member 50 along the axial direction X, the housing assembly 40 can stably and securely abut against the conductive member 50 , so that the conductive member 50 can stably introduce the voltage of the motor shaft 30 into the housing assembly 40 .

[0130] It should be additionally explained that the outer ring 62 of the bearing 60 is fixed to the housing 41 . The resolver stator 80 is fixed to the housing 41 . The stator 20 is fixed to the housing 41 .

[0131] In some embodiments, please refer to Figure 4 and Figure 6 , and in combination with other drawings. The motor shaft 30 includes a rotating shaft 31 and an adapter 32, and the rotating shaft 31 is rotatably disposed on the housing assembly 40. In the axial direction X of the motor shaft 30, at least a portion of the adapter 32 is disposed at one end of the rotating shaft 31, and the mounting groove 301 is disposed at one end of the adapter 32 away from the rotating shaft 31.

[0132] Based on this, in the axial direction X, one end of the conductive member 50 abuts against the adapter 32 , and the other end of the conductive member 50 abuts against the housing assembly 40 .

[0133] As an example, at least a portion of the adapter 32 is disposed inside one end of the rotating shaft 31 , so that the axial X dimension of the motor shaft 30 can be reduced.

[0134] In some possible designs, the rotating shaft 31 and the adapter 32 are integrally provided.

[0135] The rotating shaft 31 and the adapter 32 can be formed by, but not limited to, die-casting, casting and other processes.

[0136] Such a configuration can reduce the number of components of the motor 100 , improve the integration of the motor 100 , and facilitate the miniaturization design of the motor 100 .

[0137] Alternatively, in some other possible designs, the rotating shaft 31 and the adapter 32 are connected separately.

[0138] The rotating shaft 31 and the adapter 32 can be connected by welding, bolting, riveting and other processes.

[0139] Such a configuration facilitates the replacement and maintenance of the adapter 32 and can improve the matching flexibility between the motor shaft 30 and the conductive member 50 .

[0140] It should be noted that the inner ring 61 of the bearing 60 is sleeved on the outer circumference of the rotating shaft 31 and fixed to the rotating shaft 31. The rotor 10 is sleeved on the outer circumference of the rotating shaft 31 and fixed to the rotating shaft 31. The rotary rotor 70 is sleeved on the outer circumference of the adapter 32 and fixed to the adapter 32.

[0141] In some embodiments, see Figure 7 , and combined with other drawings. Figure 7 The partial cross-sectional view of the motor 100 provided in some embodiments of the present application. The motor 100 further includes a conductive ring 90, which is sleeved on the outer periphery of the motor shaft 30. In the radial direction Y of the motor shaft 30, the conductive ring 90 is located between the motor shaft 30 and the housing assembly 40, and abuts against the motor shaft 30 and the housing assembly 40.

[0142] The conductive ring 90 refers to a ring-shaped structure having conductive properties.

[0143] like Figure 7 As shown, on the radial direction Y of the motor shaft 30 , the conductive ring 90 is located between the motor shaft 30 and the housing assembly 40 , and abuts against the motor shaft 30 and the housing assembly 40 , which means that the inner circumferential wall of the conductive ring 90 abuts against the outer circumferential wall of the motor shaft 30 , and the outer circumferential wall of the conductive ring 90 abuts against the housing assembly 40 .

[0144] By abutting the conductive ring 90 against the motor shaft 30 and the housing assembly 40 in the radial direction Y, the conductive ring 90 can achieve conduction between the motor shaft 30 and the housing assembly 40. Then, the voltage of the motor shaft 30 can be introduced into the housing assembly 40 through the conductive ring 90, thereby achieving voltage balance between the housing assembly 40 and the motor shaft 30, and further achieving voltage balance between the inner ring 61 and the outer ring 62 of the bearing 60, so as to improve the electrical corrosion problem of the bearing 60.

[0145] It should be noted that during the rotation of the motor shaft 30, the motor shaft 30 can rotate relative to the conductive ring 90, so that on the basis of the conductive ring 90 realizing the conduction effect between the motor shaft 30 and the housing assembly 40, the motor shaft 30 can rotate smoothly relative to the housing assembly 40, so that the motor 100 can operate smoothly.

[0146] Specifically, the outer peripheral wall of the conductive ring 90 abuts against the housing 41 of the housing assembly 40 , and the inner peripheral wall of the conductive ring 90 abuts against the outer peripheral wall of the rotating shaft 31 of the motor shaft 30 .

[0147] In some embodiments, the conductive ring 90 can be fixed to the housing assembly 40 , which can ensure the position of the conductive ring 90 on the motor shaft 30 to a certain extent, so that the conductive ring 90 can stably introduce the voltage of the motor shaft 30 into the housing assembly 40 .

[0148] In some embodiments, see Figure 7 In the radial direction Y of the motor shaft 30 , the conductive ring 90 elastically abuts against the motor shaft 30 and the housing assembly 40 .

[0149] It can be understood that the conductive ring 90 has elastic properties, so that the conductive ring 90 can elastically abut against the motor shaft 30 and the housing assembly 40 .

[0150] Such arrangement enables the conductive ring 90 to reliably abut against the motor shaft 30 and the housing assembly 40 along the radial direction Y, so that during the rotation of the motor shaft 30, the conductive ring 90 can still introduce the voltage of the motor shaft 30 into between the housing groups, thereby achieving voltage balance between the motor shaft 30 and the housing assembly 40, and further achieving voltage balance between the inner ring 61 and the outer ring 62 of the bearing 60, thereby improving the electrical corrosion problem of the bearing 60.

[0151] In some embodiments, the conductive ring 90 is a conductive structure, and the conductive ring 90 includes at least one of an oil seal and a brush.

[0152] It can be understood that the conductive ring 90 can be an oil seal. Alternatively, the conductive ring 90 can also be a brush. Alternatively, there are multiple conductive rings 90, and among the multiple conductive rings 90, at least one conductive ring 90 is an oil seal and at least one conductive ring 90 is a brush.

[0153] Such a configuration enables the inner circumferential wall of the conductive ring 90 to elastically abut against the outer circumferential wall of the motor shaft 30, so that during the rotation of the motor shaft 30, the conductive ring 90 can stably abut against the motor shaft 30, and further can stably introduce the voltage of the motor shaft 30 into the housing assembly 40, thereby achieving a voltage balance between the housing assembly 40 and the motor shaft 30, and thus achieving a voltage balance between the inner ring 61 and the outer ring 62 of the bearing 60.

[0154] In some embodiments, please refer to Figure 4 and Figure 7 , and in combination with other drawings. The motor 100 further includes a bearing 60, and the bearing 60 includes an inner ring 61, an outer ring 62, and a roller 63. The inner ring 61 is sleeved on the outer circumference of the motor shaft 30 and fixed to the motor shaft 30. The outer ring 62 is sleeved on the outer circumference of the inner ring 61 and fixed to the housing assembly 40. The roller 63 is rollably disposed between the inner ring 61 and the outer ring 62.

[0155] Based on this, during the rotation of the motor shaft 30, the inner ring 61 can rotate with the motor shaft 30, so that the inner ring 61 rotates relative to the outer ring 62. In addition, during the rotation of the inner ring 61 relative to the outer ring 62, the roller 63 moves adaptively between the inner ring 61 and the outer ring 62, so that the inner ring 61 can smoothly rotate relative to the outer ring 62, and the roller 63 can achieve a supporting effect between the inner ring 61 and the outer ring 62. This arrangement can improve the rotation stability of the motor shaft 30.

[0156] Among some possible designs, such as Figure 8 As shown in the figure, and combined with other figures. Figure 8 This is a cross-sectional view of a bearing 60 of a motor 100 provided in some embodiments of the present application. The roller 63 is an insulating structure.

[0157] The roller 63 may be, but is not limited to, a ceramic roller 63 or a plastic roller 63 , that is, the roller 63 may be made of at least one of ceramic and plastic, so that the roller 63 constitutes an insulating structure.

[0158] Such an arrangement makes it difficult for current to pass between the inner ring 61 and the outer ring 62 of the bearing 60 , that is, the bearing 60 will not generate a current path as much as possible, thereby improving the problem of electrical corrosion of the bearing 60 .

[0159] In some other possible designs, such as Fig. 9 As shown in the figure, and combined with other figures. Fig. 9The cross-sectional view of the bearing 60 of the motor 100 provided in some other embodiments of the present application. The outer peripheral wall of the outer ring 62 is provided with a first insulating layer 64 .

[0160] The first insulating layer 64 refers to a layer structure with insulating properties, and the first insulating layer 64 may be, but is not limited to, a plastic layer.

[0161] Specifically, the first insulating layer 64 is disposed between the outer peripheral wall of the outer ring 62 and the housing assembly 40 to achieve insulation between the outer ring 62 and the housing assembly 40 .

[0162] Such an arrangement makes it difficult for current to pass between the housing assembly 40 and the outer ring 62 , thereby preventing a current path from being generated in the bearing 60 as much as possible, thereby improving the problem of electrical corrosion of the bearing 60 .

[0163] In some possible designs, such as Fig.10 As shown in the figure, and combined with other figures. Fig.10 The cross-sectional view of the bearing 60 of the motor 100 provided in some other embodiments of the present application. The inner peripheral wall of the inner ring 61 is provided with a second insulating layer 65 .

[0164] The second insulating layer 65 refers to a layer structure with insulating properties, and the second insulating layer 65 may be, but is not limited to, a plastic layer.

[0165] Specifically, the second insulating layer 65 is disposed between the inner circumferential wall of the inner ring 61 and the motor shaft 30 to achieve insulation between the motor shaft 30 and the inner ring 61 .

[0166] Such an arrangement makes it difficult for current to pass between the motor shaft 30 and the inner ring 61 , thereby preventing a current path from being generated between the bearing 60 and the motor shaft 30 as much as possible, thereby improving the problem of electrical corrosion of the bearing 60 .

[0167] It should be supplemented here that the design of the bearing 60 involved in the embodiment of the present application can select at least one of the above three possible designs. In addition, when there are multiple bearings 60, the designs of any two bearings 60 can be the same or different.

[0168] See also Figure 1 , and in combination with other drawings, the powertrain 1000 provided in the embodiment of the present application includes a motor 100. The motor 100 in this embodiment is the same as the motor 100 in the previous embodiment. For details, please refer to the relevant description of the motor 100 in the previous embodiment, which will not be repeated here.

[0169] The power assembly 1000 provided in the embodiment of the present application adopts the motor 100 involved in the above embodiments. On the basis of being able to achieve voltage balance between the motor shaft 30 and the housing assembly 40, that is, the motor shaft 30 is grounded through the housing assembly 40, the integration of the motor shaft 30 and the conductive member 50 in the axial direction X can be improved, and the axial X dimension of the motor 100 can be reduced to improve the compactness of the motor 100, thereby improving the integration of the power assembly 1000 and reducing the axial X dimension of the power assembly 1000.

[0170] See also Figure 1 , and in combination with other drawings, the electric device provided in the embodiment of the present application includes a motor 100 or a power assembly 1000. Among them, the motor 100 and the power assembly 1000 in this embodiment are the same as the motor 100 and the power assembly 1000 in the previous embodiment. For details, please refer to the relevant description of the motor 100 and the power assembly 1000 in the previous embodiment, which will not be repeated here.

[0171] The electric device provided in the embodiment of the present application, by adopting the motor 100 or the power assembly 1000 involved in the above embodiments, can achieve voltage balance between the motor shaft 30 and the housing assembly 40, that is, on the basis of the motor shaft 30 being grounded through the housing assembly 40, when the internal space of the electric device is predetermined, the integration of the electric device can be improved to reduce the axial X dimension of the electric device; when the volume of the electric device is predetermined, the integration of the electric device can be improved to increase the internal space of the electric device.

[0172] As one of the embodiments of this application, Figure 4As shown, the motor 100 includes a housing assembly 40, a motor shaft 30, a bearing 60, a resolver rotor 70, a resolver stator 80 and a conductive member 50. The housing assembly 40 includes a housing 41 and a fixing member 42. The motor shaft 30 is rotatably arranged on the housing 41. The bearing 60 includes an inner ring 61, an outer ring 62 and a roller 63. The inner ring 61 of the bearing 60 is sleeved on the outer circumference of the motor shaft 30 and fixed to the motor shaft 30. The outer ring 62 of the bearing 60 is sleeved on the outer circumference of the inner ring 61 and fixed to the housing 41. The roller 63 is rollably arranged between the inner ring 61 and the outer ring 62. The resolver rotor 70 is sleeved on the outer circumference of the motor shaft 30 and fixed to the motor shaft 30. The resolver stator 80 is sleeved on the outer circumference of the resolver rotor 70 and fixed to the housing 41. In the axial direction X, one end of the motor shaft 30 is provided with a mounting groove 301. The fixing member 42 is disposed on the housing 41, and in the axial direction X, the fixing member 42 and the mounting groove 301 are opposite. The conductive member 50 includes a carbon rod 51 and an elastic member 52. The carbon rod 51 is located in the mounting groove 301, and at least a portion of the elastic member 52 is located in the mounting groove 301. In the axial direction X, one end of the carbon rod 51 abuts against the motor shaft 30, and at least a portion of the elastic member 52 elastically abuts against the carbon rod 51 and the fixing member 42.

[0173] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A motor, characterized in that: include: Shell assembly; A motor shaft is rotatably disposed on the housing assembly relative to the housing assembly, and a mounting groove is disposed at one end of the motor shaft along the axial direction; The conductive member is at least partially located in the mounting groove; in the axial direction of the motor shaft, the opposite ends of the conductive member are respectively against the motor shaft and the housing assembly.

2. The motor according to claim 1, characterized in that In the axial direction of the motor shaft, opposite ends of the conductive member elastically abut against the motor shaft and the housing assembly respectively.

3. The motor according to claim 2, characterized in that The conductive member includes a carbon rod and an elastic member; In the axial direction of the motor shaft, one end of the carbon rod abuts against the motor shaft, and at least part of the elastic member elastically abuts against the other end of the carbon rod and the housing assembly; Alternatively, in the axial direction of the motor shaft, one end of the carbon rod abuts against the housing assembly, and at least part of the elastic member elastically abuts against the other end of the carbon rod and the motor shaft.

4. The motor according to any one of claims 1 to 3, characterized in that: The motor also includes a bearing, the inner ring of the bearing is sleeved on the outer circumference of the motor shaft and fixed to the motor shaft; the outer ring of the bearing is fixed to the housing assembly, and at least part of the conductive member overlaps with the bearing in the axial direction of the motor shaft.

5. The motor according to claim 4, characterized in that The motor also includes a rotor, which is sleeved on the outer circumference of the motor shaft and fixed to the motor shaft; the number of the bearings is multiple, and they are respectively distributed on opposite sides of the rotor along the axial direction of the motor shaft; at least a portion of the conductive member overlaps with at least one of the bearings on one side of the rotor in the axial direction of the motor shaft.

6. The motor according to any one of claims 1 to 3, characterized in that: The motor also includes: A resolver rotor is sleeved on the outer circumference of the motor shaft and fixed to the motor shaft; A resolver stator, sleeved on the outer circumference of the resolver rotor and fixed to the housing assembly; The resolver rotor and the resolver stator are overlapped in the axial direction of the motor shaft, and at least a portion of the conductive member is overlapped with the resolver rotor in the axial direction of the motor shaft.

7. The motor according to any one of claims 1 to 3, characterized in that: The outer peripheral wall of the conductive member and the inner peripheral wall of the mounting groove are spaced apart along the radial direction of the motor shaft.

8. The motor according to any one of claims 1 to 3, characterized in that: The inner peripheral wall of the installation groove is provided with an annular groove.

9. The motor according to any one of claims 1 to 3, characterized in that: The housing assembly comprises: a housing, wherein the motor shaft is rotatably disposed on the housing; The fixing member is arranged on the housing and abuts against the conductive member.

10. The motor according to any one of claims 1 to 3, characterized in that: The motor shaft comprises a rotating shaft and an adapter, wherein the rotating shaft is rotatably arranged on the housing assembly; in the axial direction of the motor shaft, at least a portion of the adapter is arranged on one end of the rotating shaft, and the mounting groove is arranged on an end of the adapter away from the rotating shaft; The rotating shaft and the adapter are integrally arranged, or the rotating shaft and the adapter are separately connected.

11. The motor according to any one of claims 1 to 3, characterized in that: The motor further comprises a conductive ring, which is sleeved on the outer circumference of the motor shaft; in the radial direction of the motor shaft, the conductive ring is located between the motor shaft and the housing assembly, and abuts against the motor shaft and the housing assembly.

12. The motor according to claim 11, characterized in that In the radial direction of the motor shaft, the conductive ring elastically abuts against the motor shaft and the housing assembly.

13. The motor according to claim 11, characterized in that The conductive ring is a conductive structure and includes at least one of an oil seal and a brush.

14. The motor according to any one of claims 1 to 3, characterized in that: The motor further comprises a bearing, wherein the bearing comprises: An inner ring, sleeved on the outer circumference of the motor shaft and fixed to the motor shaft; An outer ring, sleeved on the outer circumference of the inner ring and fixed to the housing assembly; A roller, rotatably disposed between the inner ring and the outer ring; Wherein, the roller is an insulating structure, and / or the outer peripheral wall of the outer ring is provided with a first insulating layer, and / or the inner peripheral wall of the inner ring is provided with a second insulating layer.

15. A powertrain, characterized in that: Comprising a motor according to any one of claims 1-14.

16. An electric device, characterized in that: Comprising the motor according to any one of claims 1-14; or, comprising the power assembly according to claim 15.

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