Motor, electric driving device, chassis and electric equipment

Abstract

The utility model provides a motor, an electric driving device, a chassis and electric equipment, the motor comprises a shell, a stator and an insulation connecting member, the shell is provided with an accommodating cavity, the stator is accommodated in the accommodating cavity, and the insulation connecting member is used for connecting the stator and the shell, so that the stator and the shell are relatively fixed and mutually insulated. According to the motor provided by the embodiment of the invention, the stator and the shell are connected through the insulating connecting component, so that the stator and the shell can be relatively fixed, the stator and the shell can be effectively insulated and separated, and the condition that current on the stator is transmitted to a bearing of the motor through the shell is effectively improved; therefore, the risk of electrocorrosion of the bearing is effectively reduced, and the performance of the motor is effectively improved.

Description

Technical Field

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

[0002] A motor is a power device used to convert electrical energy into mechanical energy. The motor usually includes a housing, a stator, a rotor and a bearing. The stator is contained in the housing and fixedly connected to the housing, and the rotor is rotatably mounted on the housing through a bearing. During the operation of the motor, current flows through the stator, causing the stator to generate a magnetic field. Under the action of the magnetic field, the rotor is magnetically coupled with the stator to drive the rotor to rotate. However, in the related art, due to the poor insulation performance of the connection between the stator and the housing, the current on the stator is easily transferred to the housing, and then transferred to the bearing through the housing, resulting in electrical corrosion of the bearing, which is not conducive to improving the performance of the motor. Utility Model Content

[0003] The purpose of the embodiments of the present application is to provide a motor, an electric drive device, a chassis and an electric device to solve the technical problem that the bearings of the motor are prone to electrical corrosion in the related art.

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

[0005] A housing having a cavity;

[0006] A stator is accommodated in the cavity;

[0007] The insulating connecting component is used to connect the stator and the shell so that the stator and the shell are relatively fixed and insulated from each other.

[0008] The motor provided by the embodiment of the present application has at least the following beneficial effects: the motor provided by the embodiment of the present application connects the stator and the casing through an insulating connecting member, which not only allows the stator and the casing to be relatively fixed, but also effectively insulates and separates the stator and the casing, effectively improving the situation where the current on the stator is transmitted to the bearings of the motor through the casing, thereby effectively reducing the risk of electrical corrosion of the bearings and effectively improving the performance of the motor.

[0009] In some embodiments of the present application, the insulating connecting component includes a first insulating member and a connecting member, the connecting member is used to connect the stator and the housing, and at least a portion of the first insulating member is arranged between at least one of the stator and the housing and the connecting member to insulate at least one of the stator and the housing from the connecting member.

[0010] By adopting the above technical solution, it is difficult for the current on the stator to be transmitted to the casing through the connecting parts, thereby effectively improving the insulation effect between the stator and the casing. Correspondingly, it is also difficult for the current on the stator to be transmitted to the bearings of the motor through the casing, thereby effectively reducing the risk of electrical corrosion of the bearings and effectively improving the performance of the motor.

[0011] In some embodiments of the present application, the connecting member includes a first connecting portion and a second connecting portion connected to each other, the first connecting portion is used to connect the stator, the second connecting portion is used to connect the housing, and at least a portion of the first insulating member is arranged between the first connecting portion and the stator to insulate the stator and the first connecting portion from each other.

[0012] By adopting the above technical solution, the stator and the first connecting part are effectively insulated and separated, so that the current on the stator is difficult to be transmitted to the casing through the connecting piece, thereby effectively improving the insulation effect between the stator and the casing. Correspondingly, the current on the stator is also difficult to be transmitted to the bearings of the motor through the casing, thereby effectively reducing the risk of electrical corrosion of the bearings and effectively improving the performance of the motor.

[0013] In some embodiments of the present application, a first connecting hole is opened on the stator, the first connecting portion includes a first connecting rod, the second connecting portion is connected to one end of the first connecting rod, the first connecting rod is inserted into the first connecting hole, and the first insulating member includes a first insulating portion, and the first insulating portion is arranged between the first connecting rod and the hole wall of the first connecting hole.

[0014] By adopting the above technical solution, the stator and the first connecting rod are effectively insulated and separated, making it difficult for the current on the stator to be transmitted to the casing through the connecting piece, thereby effectively improving the insulation effect between the stator and the casing. Correspondingly, the current on the stator is also difficult to be transmitted to the bearings of the motor through the casing, thereby effectively reducing the risk of electrical corrosion of the bearings and effectively improving the performance of the motor.

[0015] In some embodiments of the present application, the first insulating portion is interference fit between the first connecting rod and the hole wall of the first connecting hole.

[0016] By adopting the above technical solution, not only the stator and the first connecting rod are effectively insulated and separated, but also the stator is effectively fixed on the first connecting rod.

[0017] In some embodiments of the present application, the first insulating portion is in a cylindrical structure and is sleeved on the first connecting rod.

[0018] By adopting the above technical solution, the first insulating part can better cover the outer peripheral wall of the first connecting rod, thereby more effectively insulating and separating the stator and the first connecting rod.

[0019] In some embodiments of the present application, the first connecting hole is a through hole, the first connecting rod is inserted into the first connecting hole, the first connecting part also includes a first pressure head connected to an end of the first connecting rod away from the second connecting part, the first pressure head is located outside the first connecting hole and cooperates with the outer shell to clamp the stator.

[0020] By adopting the above technical solution, the relative position of the stator and the housing is effectively limited, so that the stator is effectively fixed in the housing.

[0021] In some embodiments of the present application, the first insulating member also includes a second insulating portion and a third insulating portion, the second insulating portion is clamped between the stator and the first pressure head, and the third insulating portion is arranged at an end of the first insulating portion away from the first pressure head and clamped between the stator and the casing.

[0022] By adopting the above technical solution, the stator and the first connecting rod can be insulated and separated by the first insulating part, the stator and the first pressure head can be insulated and separated by the second insulating part, and the part of the shell used to connect the stator can also be insulated and separated from the stator by the third insulating part, thereby further improving the insulation effect between the stator and the shell, making it difficult for the current on the stator to be transmitted to the bearings of the motor through the shell, thereby effectively reducing the risk of electrical corrosion of the bearings and effectively improving the performance of the motor.

[0023] In some embodiments of the present application, the second connecting portion is threadedly connected to the housing.

[0024] By adopting the above technical solution, the connection operation between the connecting piece and the housing is facilitated.

[0025] In some embodiments of the present application, the stator is provided with a first embedded hole, the first insulating member includes a fourth insulating portion, the fourth insulating portion is fixed in the first embedded hole, and the first connecting portion is connected to the fourth insulating portion.

[0026] By adopting the above technical solution, the stator and the first connecting part are effectively insulated and separated, so that the current on the stator is difficult to be transmitted to the casing through the connecting piece, thereby effectively improving the insulation effect between the stator and the casing. Correspondingly, the current on the stator is also difficult to be transmitted to the bearings of the motor through the casing, thereby effectively reducing the risk of electrical corrosion of the bearings and effectively improving the performance of the motor.

[0027] In some embodiments of the present application, a second connecting hole is opened on the shell, the second connecting portion includes a second connecting rod, the first connecting portion is connected to one end of the second connecting rod, and the second connecting rod is inserted into the second connecting hole.

[0028] By adopting the above technical solution, the connection operation between the connecting piece and the housing is facilitated.

[0029] In some embodiments of the present application, the second connecting rod is interference fit with the hole wall of the second connecting hole.

[0030] By adopting the above technical solution, the outer shell is effectively fixed on the second connecting rod.

[0031] In some embodiments of the present application, the second connecting hole is a through hole, the second connecting rod is passed through the second connecting hole, and the second connecting part also includes a second pressure head connected to an end of the second connecting rod away from the first connecting part. The second pressure head is located outside the second connecting hole and cooperates with the stator to clamp at least a portion of the shell.

[0032] By adopting the above technical solution, the relative position of the stator and the housing is effectively limited, so that the stator is effectively fixed in the housing.

[0033] In some embodiments of the present application, the first insulating member further includes a fifth insulating portion, which is disposed at an opening end of the first embedded hole and is clamped between the stator and the housing.

[0034] By adopting the above technical solution, the stator and the first connecting part can be insulated and separated by the fourth insulating part, and the part of the shell used to connect the stator can also be insulated and separated from the stator by the fifth insulating part, thereby further improving the insulation effect between the stator and the shell, making it difficult for the current on the stator to be transmitted to the bearings of the motor through the shell, thereby effectively reducing the risk of electrical corrosion of the bearings and effectively improving the performance of the motor.

[0035] In some embodiments of the present application, the first connecting portion is threadably connected to the fourth insulating portion.

[0036] By adopting the above technical solution, it is convenient to connect the connecting piece and the stator.

[0037] In some embodiments of the present application, the fourth insulating portion covers an end surface of the first connecting portion facing away from the second connecting portion and an outer peripheral wall of the first connecting portion.

[0038] By adopting the above technical solution, the insulation effect between the first connecting part and the stator is effectively improved.

[0039] In some embodiments of the present application, the connecting member includes a first connecting portion and a second connecting portion that are connected to each other, the first connecting portion is used to connect the stator, the second connecting portion is used to connect the shell, and at least a portion of the first insulating member is arranged between the second connecting portion and the shell to insulate the shell and the second connecting portion from each other.

[0040] By adopting the above technical solution, the casing and the second connecting part are effectively insulated and separated, making it difficult for the current on the stator to be transmitted to the casing through the connecting piece, thereby effectively improving the insulation effect between the stator and the casing. Correspondingly, the current on the stator is also difficult to be transmitted to the bearings of the motor through the casing, thereby effectively reducing the risk of electrical corrosion of the bearings and effectively improving the performance of the motor.

[0041] In some embodiments of the present application, a second connecting hole is opened on the outer shell, the second connecting part includes a second connecting rod, the first connecting part is connected to one end of the second connecting rod, the second connecting rod is inserted into the second connecting hole, and the first insulating part includes a sixth insulating part, which is arranged between the second connecting rod and the hole wall of the second connecting hole.

[0042] By adopting the above technical solution, the casing and the second connecting rod are effectively insulated and separated, making it difficult for the current on the stator to be transmitted to the casing through the connecting piece, thereby effectively improving the insulation effect between the stator and the casing. Correspondingly, the current on the stator is also difficult to be transmitted to the bearings of the motor through the casing, thereby effectively reducing the risk of electrical corrosion of the bearings and effectively improving the performance of the motor.

[0043] In some embodiments of the present application, the sixth insulating portion is interference fit between the second connecting rod and the hole wall of the second connecting hole.

[0044] By adopting the above technical solution, not only the outer shell and the second connecting rod are effectively insulated and separated, but also the outer shell and the second connecting rod are effectively fixedly connected.

[0045] In some embodiments of the present application, the sixth insulating portion is in a tubular structure and is sleeved on the second connecting rod.

[0046] By adopting the above technical solution, the sixth insulating part can better cover the outer peripheral wall of the second connecting rod, thereby more effectively insulating and separating the outer shell from the second connecting rod.

[0047] In some embodiments of the present application, the second connecting hole is a through hole, the second connecting rod is passed through the second connecting hole, and the second connecting part also includes a second pressure head connected to an end of the second connecting rod away from the first connecting part. The second pressure head is located outside the second connecting hole and cooperates with the stator to clamp at least a portion of the shell.

[0048] By adopting the above technical solution, the relative position of the stator and the housing is effectively limited, so that the stator is effectively fixed in the housing.

[0049] In some embodiments of the present application, the first insulating member also includes a seventh insulating portion and an eighth insulating portion, the seventh insulating portion is clamped between the outer shell and the second pressure head, and the eighth insulating portion is arranged at an end of the sixth insulating portion away from the second pressure head and clamped between the stator and the outer shell.

[0050] By adopting the above technical solution, the casing and the second connecting rod can be insulated and separated by the sixth insulating part, the casing and the second pressure head can be insulated and separated by the seventh insulating part, and the part of the casing used to connect the stator can also be insulated and separated from the stator by the eighth insulating part, thereby further improving the insulation effect between the stator and the casing, making it difficult for the current on the stator to be transmitted to the bearings of the motor through the casing, thereby effectively reducing the risk of electrical corrosion of the bearings and effectively improving the performance of the motor.

[0051] In some embodiments of the present application, the first connection portion is threadedly connected to the stator.

[0052] By adopting the above technical solution, it is convenient to connect the connecting piece and the stator.

[0053] In some embodiments of the present application, the shell is provided with a second embedded hole, the first insulating member includes a ninth insulating portion, the ninth insulating portion is fixed in the second embedded hole, and the second connecting portion is connected to the ninth insulating portion.

[0054] By adopting the above technical solution, the casing and the second connecting part are effectively insulated and separated, making it difficult for the current on the stator to be transmitted to the casing through the connecting piece, thereby effectively improving the insulation effect between the stator and the casing. Correspondingly, the current on the stator is also difficult to be transmitted to the bearings of the motor through the casing, thereby effectively reducing the risk of electrical corrosion of the bearings and effectively improving the performance of the motor.

[0055] In some embodiments of the present application, a first connecting hole is opened on the stator, the first connecting portion includes a first connecting rod, the second connecting portion is connected to one end of the first connecting rod, and the first connecting rod is inserted into the first connecting hole.

[0056] By adopting the above technical solution, it is convenient to connect the connecting piece and the stator.

[0057] In some embodiments of the present application, the first connecting rod is interference fit with the hole wall of the first connecting hole.

[0058] By adopting the above technical solution, the stator is effectively fixed on the first connecting rod.

[0059] In some embodiments of the present application, the first connecting hole is a through hole, the first connecting rod is inserted into the first connecting hole, the first connecting part also includes a first pressure head connected to an end of the first connecting rod away from the second connecting part, the first pressure head is located outside the first connecting hole and cooperates with the outer shell to clamp the stator.

[0060] By adopting the above technical solution, the relative position of the stator and the housing is effectively limited, so that the stator is effectively fixed in the housing.

[0061] In some embodiments of the present application, the first insulating member further includes a tenth insulating portion, which is disposed at an opening end of the second embedded hole and is clamped between the stator and the housing.

[0062] By adopting the above technical solution, the casing and the second connecting part can be insulated and separated by the ninth insulating part, and the part of the casing used to connect the stator can also be insulated and separated from the stator by the tenth insulating part, thereby further improving the insulation effect between the stator and the casing, making it difficult for the current on the stator to be transmitted to the bearings of the motor through the casing, thereby effectively reducing the risk of electrical corrosion of the bearings and effectively improving the performance of the motor.

[0063] In some embodiments of the present application, the second connecting portion is threadably connected to the ninth insulating portion.

[0064] By adopting the above technical solution, the connection operation between the connecting piece and the housing is facilitated.

[0065] In some embodiments of the present application, the ninth insulating portion covers an end surface of the second connecting portion facing away from the first connecting portion and an outer peripheral wall of the second connecting portion.

[0066] By adopting the above technical solution, the insulation effect between the second connecting part and the shell is effectively improved.

[0067] In some embodiments of the present application, the housing may include a shell and a connecting seat, the shell has a cavity, the connecting seat is arranged in the cavity and connected to the cavity wall of the cavity, and the insulating connecting member is connected between the connecting seat and the stator.

[0068] By adopting the above technical solution, the connection structure between the shell and the stator can be arranged in the cavity without opening holes in the wall of the shell, thereby effectively improving the sealing performance of the shell.

[0069] In some embodiments of the present application, the connecting member connects the stator and the casing along the axial direction of the motor.

[0070] By adopting the above technical solution, the relative positions of the stator and the housing along the axial direction of the motor are effectively limited, so that the stator and the housing can be relatively fixed along the axial direction of the motor.

[0071] In some embodiments of the present application, the insulating connection member includes a second insulating member, and the second insulating member is interference-fitted between the outer peripheral side of the stator and the housing.

[0072] By adopting the above technical solution, not only the insulation effect between the stator and the casing is further improved, making it difficult for the current on the stator to be transmitted to the bearings of the motor through the casing, thereby effectively reducing the risk of electrical corrosion of the bearings and effectively improving the performance of the motor, but also the relative position of the stator and the casing along the radial direction of the motor is effectively limited, so that the stator and the casing can be relatively fixed along the radial direction of the motor.

[0073] In some embodiments of the present application, the second insulating member is in a cylindrical structure and is sleeved on the outer circumference of the stator.

[0074] By adopting the above technical solution, the second insulating member can better cover the outer peripheral side of the stator, thereby more effectively insulating and separating the outer peripheral side of the stator from the housing.

[0075] In some embodiments of the present application, the insulating connection member is interference-fitted between the outer circumferential side of the stator and the housing.

[0076] By adopting the above technical solution, not only the insulation effect between the stator and the casing is effectively improved, making it difficult for the current on the stator to be transmitted to the bearings of the motor through the casing, thereby effectively reducing the risk of electrical corrosion of the bearings and effectively improving the performance of the motor, but also the relative position of the stator and the casing along the radial direction of the motor is effectively limited, so that the stator and the casing can be relatively fixed along the radial direction of the motor.

[0077] In some embodiments of the present application, the insulating connecting member is in a cylindrical structure and is sleeved on the outer circumference of the stator.

[0078] By adopting the above technical solution, the insulating connecting component can better cover the outer peripheral side of the stator, thereby more effectively insulating and separating the outer peripheral side of the stator from the housing.

[0079] In some embodiments of the present application, the insulating connecting component is an integrally formed component.

[0080] By adopting the above technical solution, the insulating connecting component can be integrally connected between the stator and the housing, which not only realizes the mutual connection between the stator and the housing, but also effectively insulates and separates the stator and the housing, thereby effectively simplifying the assembly process of the motor and improving assembly efficiency.

[0081] In some embodiments of the present application, the insulating connecting member connects the stator and the casing along the axial direction of the motor.

[0082] By adopting the above technical solution, the relative positions of the stator and the housing along the axial direction of the motor are effectively limited, so that the stator and the housing can be relatively fixed along the axial direction of the motor.

[0083] In some embodiments of the present application, the motor also includes a rotor, a bearing and a conductive member, the rotor includes a rotor body magnetically coupled to the stator and a rotating shaft coaxially connected to the rotor body, the bearing is mounted on the outer casing and sleeved on the rotating shaft, and the conductive member is electrically connected between the rotating shaft and the outer casing.

[0084] By adopting the above technical solution, the induced current generated by the magnetic coupling between the rotor and the stator can be directly transmitted to the casing through the conductive parts without flowing through the bearings, thereby further reducing the risk of electrical corrosion of the bearings and further improving the performance of the motor.

[0085] In some embodiments of the present application, the motor further includes a grounding wire and a first common-mode current filter, the grounding wire is electrically connected to the housing, and the first common-mode current filter is disposed on the grounding wire.

[0086] By adopting the above technical solution, the common mode current on the motor can be effectively suppressed, thereby further reducing the risk of electrical corrosion of the bearing and further improving the performance of the motor.

[0087] An embodiment of the present application further provides an electric drive device, comprising a controller and the motor described in any one of the above embodiments, wherein the controller is electrically connected to the motor.

[0088] The electric drive device provided in the embodiments of the present application has at least the following beneficial effects: the electric drive device provided in the embodiments of the present application adopts the motor described in any one of the above embodiments, thereby effectively improving the working performance of the electric drive device.

[0089] In some embodiments of the present application, the electric drive device further includes a second common-mode current filter, the controller is electrically connected to the motor through an AC wiring harness, and the second common-mode current filter is disposed on the AC wiring harness.

[0090] By adopting the above technical solution, the common-mode current transmitted by the controller to the motor can be effectively suppressed, thereby further reducing the risk of electrical corrosion of the bearings and further improving the performance of the motor.

[0091] An embodiment of the present application further provides a chassis, comprising a battery and the electric drive device described in any one of the above embodiments, wherein the battery is electrically connected to a controller.

[0092] The chassis provided by the embodiments of the present application has at least the following beneficial effects: the chassis provided by the embodiments of the present application effectively improves the working performance of the chassis due to the adoption of the electric drive device described in any of the above embodiments.

[0093] An embodiment of the present application also provides an electric device, comprising the electric drive device or the above-mentioned chassis described in any one of the above-mentioned embodiments.

[0094] The electric device provided by the embodiments of the present application has at least the following beneficial effects: the electric device provided by the embodiments of the present application effectively improves the working performance of the electric device due to the adoption of the electric drive device or the above-mentioned chassis described in any of the above-mentioned embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0095] 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.

[0096] Figure 1 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application;

[0097] Figure 2 A schematic diagram of the circuit structure of the chassis provided in the embodiment of the present application;

[0098] Figure 3 A schematic diagram of the explosion structure of a battery provided in an embodiment of the present application;

[0099] Figure 4 A schematic diagram of the structure of a motor provided in one embodiment of the present application;

[0100] Figure 5 for Figure 4 The enlarged structural diagram of the motor at position A is shown;

[0101] Figure 6 for Figure 4 The enlarged structural diagram of the motor at position B is shown;

[0102] Figure 7 A schematic diagram of the structure of a motor provided in another embodiment of the present application;

[0103] Figure 8 for Figure 7 The enlarged structural diagram of the motor at position C is shown;

[0104] Fig. 9 A schematic diagram of the structure of a motor provided in yet another embodiment of the present application;

[0105] Fig.10 for Fig. 9 The enlarged structural diagram of the motor at D is shown;

[0106] Fig.11 A schematic diagram of the structure of a motor provided in yet another embodiment of the present application;

[0107] Fig.12 for Fig.11 The enlarged structural diagram of the motor at position E is shown;

[0108] Fig.13 for Fig.11 The enlarged structural diagram of the motor at position F is shown;

[0109] Fig.14A schematic diagram of the structure of a motor provided in yet another embodiment of the present application;

[0110] Fig.15 A schematic diagram of the structure of a motor provided in yet another embodiment of the present application;

[0111] Fig.16 A schematic diagram of the structure of a motor provided in yet another embodiment of the present application.

[0112] Among them, the reference numerals in the figure are:

[0113] 1000. Vehicles;

[0114] 100. Electric drive device;

[0115] 110, motor; 111, housing; 1111, housing; 11111, cavity; 1112, connection seat; 11121, second connection hole; 11122, second embedded hole; 1113, bearing seat; 112, stator; 1121, first connection hole; 1122, first embedded hole; 113, insulating connection member; 1131, connection member; 11311, first connection part; 11312, second connection part; 11313, first connecting rod; 11314, first pressure head; 11315, second connecting rod; 11316, second pressure head; 1132, first Insulating member; 1132a, first insulating portion; 1132b, second insulating portion; 1132c, third insulating portion; 1132d, fourth insulating portion; 1132e, fifth insulating portion; 1132f, sixth insulating portion; 1132g, seventh insulating portion; 1132h, eighth insulating portion; 1132i, ninth insulating portion; 1132j, tenth insulating portion; 1133, second insulating member; 114, rotor; 1141, rotor body; 1142, rotating shaft; 115, bearing; 116, conductive member; 117, grounding wire; 118, first common mode current filter;

[0116] 120. Controller;

[0117] 130, DC wiring harness;

[0118] 140. AC wiring harness;

[0119] 150. A second common mode current filter;

[0120] 200. Battery;

[0121] 210, box body; 211, first part; 212, second part;

[0122] 220. Battery cell. DETAILED DESCRIPTION

[0123] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0124] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0125] 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.

[0126] In addition, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh", "eighth", "ninth", and "tenth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first", "second", "third", "fourth", "fifth", "sixth", "seventh", "eighth", "ninth", and "tenth" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0127] The motor is the power device of the electric device. The motor is used to convert electrical energy into mechanical energy to drive the electric device. The motor usually includes a housing, a stator, a rotor and a bearing. The stator is accommodated in the housing and fixedly connected to the housing, and the rotor is rotatably mounted on the housing through the bearing.

[0128] In the related art, the current flows through the stator, causing the stator to generate a magnetic field. Under the action of the magnetic field, the rotor is magnetically coupled with the stator to drive the rotor to rotate. However, since the stator is fixedly connected to the housing, and the insulation performance of the connection between the stator and the housing is poor, the current on the stator is easily transferred to the housing through the connecting parts, and then transferred to the bearing through the housing, causing electrical corrosion of the bearing, which is not conducive to improving the performance of the motor.

[0129] In order to reduce the risk of electrical corrosion of bearings, the motor provided in the embodiment of the present application connects the stator and the casing through an insulating connecting member, which not only allows the stator and the casing to be relatively fixed, but also effectively insulates and separates the stator and the casing, effectively improving the situation where the current on the stator is transmitted to the bearings of the motor through the casing, thereby effectively reducing the risk of electrical corrosion of the bearings and effectively improving the performance of the motor.

[0130] The motor provided in the embodiment of the present application can be applied to electric equipment, and the electric equipment can be but is not limited to vehicles, ships, airplanes, spacecraft, excavators, cranes, lifts, elevators, etc., and no specific limitation is made here.

[0131] For the convenience of description, the following embodiments are described by taking the electric device of one embodiment of the present application as a vehicle as an example.

[0132] See also Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1000 provided in an embodiment of the present application. According to the power source, the vehicle 1000 can be a pure electric vehicle, a hybrid electric vehicle or an extended-range vehicle, etc. According to the driving mode, the vehicle 1000 can be a front-wheel drive vehicle, a rear-wheel drive vehicle or a four-wheel drive vehicle. A battery 200 is provided inside the vehicle 1000, and the battery 200 can be provided at the bottom, the head or the tail of the vehicle 1000. The battery 200 can be used for powering the vehicle 1000, for example, the battery 200 can be used as an operating power supply for the vehicle 1000. The vehicle 1000 may also include an electric drive device 100 and a chassis frame, the chassis frame having an energy cabin and a cabin, the battery 200 being installed in the energy cabin, and the electric drive device 100 being installed in the cabin to constitute the chassis of the vehicle 1000. The electric drive device 100 includes a motor 110 and a controller 120, and the controller 120 is used to control the battery 200 to power the motor 110. The battery 200, the controller 120 and the motor 110 constitute the electric drive system of the vehicle 1000. The electric drive system is the power system of the vehicle 1000. The electric drive system is used to convert electrical energy into mechanical energy and output the mechanical energy to the wheels of the vehicle 1000 to drive the vehicle 1000.

[0133] See also Figure 3 , Figure 3Schematic diagram of an explosion of a battery 200 provided in an embodiment of the present application. The battery 200 includes a box 210 and a battery cell 220, and the battery cell 220 is contained in the box 210. Among them, the box 210 is used to provide a storage space for the battery cell 220, and the box 210 can adopt a variety of structures. In some embodiments, the box 210 may include a first part 211 and a second part 212, and the first part 211 and the second part 212 cover each other, and the first part 211 and the second part 212 jointly define a storage space for accommodating the battery cell 220. The second part 212 may be a hollow structure with one end open, and the first part 211 may be a plate-like structure, and the first part 211 is covered on the open side of the second part 212, so that the first part 211 and the second part 212 jointly define a storage space; the first part 211 and the second part 212 may also be hollow structures with one side open, and the open side of the first part 211 is covered on the open side of the second part 212. Of course, the box body 210 formed by the first part 211 and the second part 212 can be in various shapes, such as a cylinder, a cuboid, etc.

[0134] In some embodiments, the box 210 may be a part of the chassis of the vehicle 1000. For example, a part of the box 210 may become at least a part of the floor of the vehicle 1000, or a part of the box 210 may become at least a part of the cross beam and the longitudinal beam of the vehicle 1000.

[0135] Of course, in some embodiments, the battery 200 may not include the housing 210 , but rather a plurality of battery cells 220 may be electrically connected and assembled into the vehicle 1000 after being formed into a whole through necessary fixing structures.

[0136] In the battery 200, there may be a plurality of battery cells 220, and the plurality of battery cells 220 may be connected in series, in parallel, or in a hybrid connection. A hybrid connection means that the plurality of battery cells 220 are both connected in series and in parallel. The plurality of battery cells 220 may be directly connected in series, in parallel, or in a hybrid connection, and then the whole formed by the plurality of battery cells 220 is accommodated in the box 210. Of course, the battery 200 may also be a battery module formed by first connecting the plurality of battery cells 220 in series, in parallel, or in a hybrid connection, and then the plurality of battery modules are connected in series, in parallel, or in a hybrid connection to form a whole, and then accommodated in the box 210. The battery 200 may also include other functional components, for example, the battery 200 may also include a busbar for realizing electrical connection between the plurality of battery cells 220.

[0137] Each battery cell 220 may be a secondary battery or a primary battery, wherein a secondary battery refers to a battery cell 220 that can be used continuously by activating active materials by charging after the battery cell 220 is discharged, and a primary battery refers to a battery cell 220 that cannot be used continuously by activating active materials by charging after the power of the battery cell 220 is exhausted; the battery cell 220 may also be a lithium-ion battery cell, a sodium-ion battery cell, a sodium-lithium-ion battery cell, a lithium metal battery cell, a sodium metal battery cell, a lithium-sulfur battery cell, a magnesium-ion battery cell, a nickel-hydrogen battery cell, a nickel-cadmium battery cell, a lead-acid battery cell, etc. The battery cell 220 may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell, or a battery cell 220 of other shapes, wherein the prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a multi-prismatic battery, and the multi-prismatic battery is, for example, a hexagonal battery, etc., and the present application has no particular limitation.

[0138] The motor 110 is used to convert the electric energy provided by the battery 200 into mechanical energy and output the mechanical energy to the wheels of the vehicle 1000 to drive the vehicle 1000. In the case where the vehicle 1000 is a front-wheel drive vehicle, the motor 110 is installed in the front engine compartment of the vehicle 1000 and is used to output the mechanical energy to the front wheels of the vehicle 1000 to drive the vehicle 1000; in the case where the vehicle 1000 is a rear-wheel drive vehicle, the motor 110 is installed in the rear engine compartment of the vehicle 1000 and is used to output the mechanical energy to the rear wheels of the vehicle 1000 to drive the vehicle 1000; in the case where the vehicle 1000 is a four-wheel drive vehicle, there are two motors 110, one motor 110 is installed in the front engine compartment of the vehicle 1000 and is used to output the mechanical energy to the front wheels of the vehicle 1000, and the other motor 110 is installed in the rear engine compartment of the vehicle 1000 and is used to output the mechanical energy to the rear wheels of the vehicle 1000 to drive the vehicle 1000. The motor 110 may be an axial flux motor or a radial flux motor.

[0139] The electric drive device 100 may further include a speed change mechanism (not shown in the figure), which is a power transmission mechanism of the electric drive device 100. The speed change mechanism has a power input end and a power output end. The power input end of the speed change mechanism is connected to the rotating shaft 1142 of the motor 110, and the power output end of the speed change mechanism is connected to the wheels of the vehicle 1000, so as to transfer the above mechanical energy to the wheels of the vehicle 1000 by changing the speed and torque of the motor 110. For example, the speed change mechanism transfers the above mechanical energy to the wheels of the vehicle 1000 by reducing the speed of the motor 110 and increasing the torque of the motor 110. For another example, the speed change mechanism transfers the above mechanical energy to the wheels of the vehicle 1000 by increasing the speed of the motor 110 and reducing the torque of the motor 110. The speed change mechanism may be, but is not limited to, a pinion speed change mechanism, a worm speed change mechanism, a planetary gear speed change mechanism, a continuously variable speed change mechanism, and the like.

[0140] The controller 120 is used to convert the direct current output by the battery 200 into alternating current and transmit the alternating current to the motor 110 , and is also used to control the operation of the motor 110 , for example, controlling the start and stop, speed, torque, etc. of the motor 110 .

[0141] The motor 110 provided in the embodiment of the present application is described below with reference to the accompanying drawings.

[0142] First, please also refer to Figures 4 to 16 An embodiment of the present application provides a motor 110, including a housing 111, a stator 112 and an insulating connecting member 113. The housing 111 has a cavity 11111, and the stator 112 is accommodated in the cavity 11111. The insulating connecting member 113 is used to connect the stator 112 and the housing 111 so that the stator 112 and the housing 111 are relatively fixed and insulated from each other.

[0143] The housing 111 is a component for providing an internal installation environment for the motor 110, wherein at least part of the internal installation environment of the motor 110 constitutes the above-mentioned cavity 11111, and the stator 112 is accommodated in the cavity 11111. The housing 111 may be an integrally formed component, or an assembled component assembled from multiple parts. In some embodiments, in order to facilitate the assembly of the stator 112 into the cavity 11111, the housing 111 may include a shell 1111 and an end cover, and the shell 1111 defines the internal installation environment of the motor 110. The stator 112 may be placed in the cavity 11111 first, and then the stator 112 may be assembled in the cavity 11111. After the assembly operation of the stator 112 is completed, the end cover is set at the opening of the shell 1111 to isolate the internal installation environment of the motor 110 from the external environment of the motor 110. The material of the housing 111 may be, but is not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, etc.

[0144] The stator 112 is a fixed part of the motor 110 and is used to drive the rotating part of the motor 110 to rotate. The stator 112 may include a first core and a first winding, the first core is provided with a first winding groove, and the first winding is wound in the first winding groove. In some embodiments, the first core may be used to connect the housing 111, that is, the first core is connected to the housing 111 through an insulating connecting member 113.

[0145] In some embodiments, the motor 110 may further include a rotor 114 and a bearing 115. The rotor 114 may include a rotor body 1141 magnetically coupled to the stator 112 and a rotating shaft 1142 coaxially connected to the rotor body 1141. The bearing 115 is mounted on the housing 111 and sleeved on the rotating shaft 1142. The rotor body 1141 may include a second core and a second winding. The second core is provided with a second winding groove. The second winding is wound in the second winding groove. During operation, current may be input to the first winding so that the first winding generates a magnetic field. Under the action of the magnetic field, the rotor body 1141 rotates, thereby driving the rotating shaft 1142 to rotate. The housing 111 may further include a bearing seat 1113. The bearing seat 1113 is fixedly connected to the housing 1111. The bearing 115 is mounted on the bearing seat 1113. The number of bearings 115 can be two, and accordingly, the number of bearing seats 1113 is also two. The two bearings 115 and the two bearing seats 1113 are arranged in a one-to-one correspondence, one bearing 115 is sleeved on one end of the rotating shaft 1142, and the other bearing 115 is sleeved on the other end of the rotating shaft 1142.

[0146] In some embodiments, the motor 110 may further include a cooling medium, which is a medium for absorbing the heat generated by the stator 112 and other heat-generating components. The cooling medium may be contained in the cavity 11111, and at least a portion of the stator 112 may be immersed in the cooling medium to achieve cooling of the stator 112. The cooling medium may also enter the cavity 11111 during the circulation process, and the cooling medium may directly contact the stator 112 or indirectly contact the stator 112, thereby taking away the heat generated by the stator 112 during operation, and achieving cooling of the stator 112. The cooling medium may be, but is not limited to, cooling oil, cooling water, and the like.

[0147] The insulating connecting member 113 is not only used to connect the stator 112 and the housing 111, but also used to insulate and separate the stator 112 from the housing 111. It can be understood that the insulating connecting member 113 at least includes an insulating portion, the insulating portion is made of an insulating material, and the insulating portion is arranged between the stator 112 and the housing 111 to insulate and separate the stator 112 from the housing 111. The insulating material can be, but is not limited to, resin, rubber, ceramic, mica, glass, asbestos, etc. In some embodiments, the insulating connecting member 113 may include an insulating portion and a rigid portion, the rigid portion is made of a rigid material with good structural strength characteristics, such as aluminum alloy, stainless steel, iron, titanium alloy, etc. The rigid portion is used to connect the stator 112 and the housing 111 so that the stator 112 and the housing 111 are relatively fixed, and the insulating portion can be arranged between the stator 112 and the rigid portion and / or between the housing 111 and the rigid portion and / or between the stator 112 and the housing 111. Of course, in other embodiments, the insulating connecting member 113 can be made entirely of a rigid material with insulating properties. The insulating connecting member 113 may be connected to the stator 112 and the housing 111 in a manner including, but not limited to, threaded connection, bonding, snap connection, interference fit connection, and the like.

[0148] The motor 110 provided in the embodiment of the present application connects the stator 112 and the housing 111 through an insulating connecting member 113, which not only allows the stator 112 and the housing 111 to be relatively fixed, but also effectively insulates and separates the stator 112 and the housing 111, effectively improving the current on the stator 112 from being transmitted to the bearing 115 of the motor 110 through the housing 111, thereby effectively reducing the risk of electrical corrosion of the bearing 115 and effectively improving the performance of the motor 110.

[0149] In addition, by adopting the above technical solution, there is no need to adopt bearings 115 with higher costs such as ceramic bearings, conductive bearings, etc., thereby effectively reducing the manufacturing cost of the motor 110.

[0150] In some embodiments of this application, please refer to Figures 4 to 14 The insulating connecting component 113 includes a first insulating member 1132 and a connecting member 1131, the connecting member 1131 is used to connect the stator 112 and the housing 111, and at least a portion of the first insulating member 1132 is arranged between at least one of the stator 112 and the housing 111 and the connecting member 1131, so that at least one of the stator 112 and the housing 111 and the connecting member 1131 are insulated from each other.

[0151] The connector 1131 is used to connect the stator 112 and the housing 111. The connector 1131 may include a first connector 11311 and a second connector 11312 connected to each other, wherein the first connector 11311 is a portion of the connector 1131 used to connect the stator 112, and the second connector 11312 is a portion of the connector 1131 used to connect the housing 111, so that the stator 112 and the housing 111 are relatively fixed. It should be noted that the first connection part 11311 can be directly connected to the stator 112, that is, the first connection part 11311 is in direct contact with the stator 112, and the first connection part 11311 can also be indirectly connected to the stator 112, that is, the first connection part 11311 and the stator 112 are indirectly in contact and connected through other components. Similarly, the second connection part 11312 can be directly connected to the housing 111, that is, the second connection part 11312 is in direct contact with the housing 111, and the second connection part 11312 can also be indirectly connected to the housing 111, that is, the second connection part 11312 is indirectly in contact and connected with the housing 111 through other components. It can be understood that the connector 1131 is made of a rigid material, and the rigid material can be, but is not limited to, aluminum alloy, stainless steel, iron, titanium alloy, etc.

[0152] The first insulating member 1132 is a part of the insulating portion in the insulating connecting member 113. In some embodiments, at least a part of the first insulating member 1132 is disposed between the stator 112 and the connecting member 1131, and a part of the first insulating member 1132 may be disposed between the stator 112 and the connecting member 1131, or the entire first insulating member 1132 may be disposed between the stator 112 and the connecting member 1131, so that the stator 112 and the connecting member 1131 are insulated from each other, so that the current on the stator 112 is difficult to be transmitted to the connecting member 1131, that is, the current on the stator 112 is difficult to be transmitted to the housing 111 through the connecting member 1131.

[0153] In other embodiments, at least a portion of the first insulating member 1132 is disposed between the outer shell 111 and the connecting member 1131. A portion of the first insulating member 1132 may be disposed between the outer shell 111 and the connecting member 1131, or the entire first insulating member 1132 may be disposed between the outer shell 111 and the connecting member 1131, so that the outer shell 111 and the connecting member 1131 are insulated from each other. In this way, even if the current on the stator 112 is transmitted to the connecting member 1131, the current is difficult to be transmitted to the outer shell 111 through the connecting member 1131.

[0154] In some other embodiments, at least a portion of the first insulating member 1132 is disposed between the stator 112 and the connecting member 1131, and at least another portion of the first insulating member 1132 is disposed between the housing 111 and the connecting member 1131, which not only insulates the stator 112 and the connecting member 1131 from each other, but also insulates the housing 111 and the connecting member 1131 from each other. In this way, the current on the stator 112 is difficult to be transmitted to the connecting member 1131, and is even more difficult to be transmitted to the housing 111 through the connecting member 1131.

[0155] In some embodiments, the connecting member 1131 and the first insulating member 1132 may be formed separately and then assembled into a whole.

[0156] In other embodiments, after the connector 1131 is formed, an insulating material may be poured onto the outer wall of the connector 1131 using a thermoplastic molding process, and the first insulating member 1132 may be formed after the insulating material is solidified.

[0157] In some other embodiments, insulating paint may be coated on the outer wall of the connecting member 1131 after the connecting member 1131 is formed, and the first insulating member 1132 may be formed after the insulating paint is cured.

[0158] By adopting the above technical solution, it is difficult for the current on the stator 112 to be transmitted to the housing 111 through the connecting piece 1131, thereby effectively improving the insulation effect between the stator 112 and the housing 111. Correspondingly, it is also difficult for the current on the stator 112 to be transmitted to the bearing 115 of the motor 110 through the housing 111, thereby effectively reducing the risk of electrical corrosion of the bearing 115 and effectively improving the performance of the motor 110.

[0159] In some embodiments of this application, please refer to Figures 4 to 8 At least a portion of the first insulating member 1132 is disposed between the first connecting portion 11311 and the stator 112 , so that the stator 112 and the first connecting portion 11311 are insulated from each other.

[0160] In other words, in this embodiment, at least a portion of the first insulating member 1132 is disposed between the stator 112 and the connecting member 1131. A portion of the first insulating member 1132 may be disposed between the stator 112 and the first connecting portion 11311, or the entire first insulating member 1132 may be disposed between the stator 112 and the first connecting portion 11311, so that the stator 112 and the first connecting portion 11311 are insulated from each other.

[0161] By adopting the above technical solution, the stator 112 and the first connecting part 11311 are effectively insulated and separated, so that the current on the stator 112 is difficult to be transmitted to the housing 111 through the connecting piece 1131, thereby effectively improving the insulation effect between the stator 112 and the housing 111. Correspondingly, the current on the stator 112 is also difficult to be transmitted to the bearing 115 of the motor 110 through the housing 111, thereby effectively reducing the risk of electrical corrosion of the bearing 115 and effectively improving the performance of the motor 110.

[0162] In some embodiments of this application, please refer to Figures 4 to 6 A first connecting hole 1121 is opened on the stator 112, the first connecting part 11311 includes a first connecting rod 11313, the second connecting part 11312 is connected to one end of the first connecting rod 11313, the first connecting rod 11313 is inserted into the first connecting hole 1121, and the first insulating member 1132 includes a first insulating part 1132a, and the first insulating part 1132a is arranged between the first connecting rod 11313 and the hole wall of the first connecting hole 1121.

[0163] The first connection hole 1121 is a hole structure of the stator 112 for connecting the first connecting rod 11313 . The first connection hole 1121 may be a through hole or a blind hole.

[0164] The first connecting rod 11313 is inserted into the first connecting hole 1121, and the first insulating portion 1132a is arranged between the first connecting rod 11313 and the hole wall of the first connecting hole 1121. In other words, when the first connecting rod 11313 is inserted into the first connecting hole 1121, a gap is formed between the outer peripheral wall of the first connecting rod 11313 and the hole wall of the first connecting hole 1121, and the first insulating portion 1132a is arranged in the gap to insulate and separate the first connecting rod 11313 from the hole wall of the first connecting hole 1121.

[0165] By adopting the above technical solution, the stator 112 and the first connecting rod 11313 are effectively insulated and separated, so that the current on the stator 112 is difficult to be transmitted to the housing 111 through the connecting piece 1131, thereby effectively improving the insulation effect between the stator 112 and the housing 111. Correspondingly, the current on the stator 112 is also difficult to be transmitted to the bearing 115 of the motor 110 through the housing 111, thereby effectively reducing the risk of electrical corrosion of the bearing 115 and effectively improving the performance of the motor 110.

[0166] In some embodiments of the present application, the first insulating portion 1132 a is interference fit between the first connecting rod 11313 and the hole wall of the first connecting hole 1121 .

[0167] The interference fit of the first insulating part 1132a between the first connecting rod 11313 and the hole wall of the first connecting hole 1121 means that: the outer diameter of the whole formed by the first insulating part 1132a and the first connecting rod 11313 is slightly larger than the hole diameter of the first connecting hole 1121, and when the first connecting rod 11313 is inserted into the first connecting hole 1121 and the first insulating part 1132a is arranged between the first connecting rod 11313 and the hole wall of the first connecting hole 1121, the outer peripheral wall of the first connecting rod 11313 cooperates with the hole wall of the first connecting hole 1121 to squeeze the first insulating part 1132a, so that the first connecting rod 11313 is fixedly arranged in the first connecting hole 1121.

[0168] In some embodiments, in order to facilitate interference fit of the first insulating portion 1132a between the first connecting rod 11313 and the hole wall of the first connecting hole 1121, the first insulating portion 1132a can be made of an elastic insulating material, so that in the process of setting the first insulating portion 1132a between the first connecting rod 11313 and the hole wall of the first connecting hole 1121, the first insulating portion 1132a can be elastically compressed under the action of the outer peripheral wall of the first connecting rod 11313 and the hole wall of the first connecting hole 1121, until the first insulating portion 1132a completely enters the gap between the outer peripheral wall of the first connecting rod 11313 and the hole wall of the first connecting hole 1121. The elastic insulating material can be, but is not limited to, rubber, elastic plastic, etc.

[0169] By adopting the above technical solution, not only the stator 112 and the first connecting rod 11313 are effectively insulated and separated, but also the stator 112 is effectively fixed on the first connecting rod 11313.

[0170] In some embodiments of this application, please refer to Figures 4 to 6 The first insulating portion 1132a is in a tubular structure and is sleeved on the first connecting rod 11313.

[0171] The first insulating portion 1132 a is sleeved on the first connecting rod 11313 . In other words, the first insulating portion 1132 a covers the outer peripheral wall of the first connecting rod 11313 .

[0172] In some embodiments, the cross-sectional shape of the inner cavity of the first insulating part 1132a is adapted to the cross-sectional shape of the first connecting rod 11313. For example, the cross-sectional shape of the inner cavity of the first insulating part 1132a and the cross-sectional shape of the first connecting rod 11313 are both circular, and the inner wall of the first insulating part 1132a is in contact with the outer wall of the first connecting rod 11313.

[0173] In some embodiments, the length of the first insulating portion 1132a is greater than or equal to the length of the first connecting hole 1121, so that the first insulating portion 1132a can completely fill the gap between the outer peripheral wall of the first connecting rod 11313 and the hole wall of the first connecting hole 1121, thereby more effectively insulating and separating the stator 112 from the first connecting rod 11313.

[0174] By adopting the above technical solution, the first insulating portion 1132a can better cover the outer peripheral wall of the first connecting rod 11313, thereby more effectively insulating and separating the stator 112 and the first connecting rod 11313.

[0175] In some embodiments of this application, please refer to Figures 4 to 6 The first connecting hole 1121 is a through hole, the first connecting rod 11313 is passed through the first connecting hole 1121, the first connecting portion 11311 also includes a first pressing head 11314 connected to one end of the first connecting rod 11313 away from the second connecting portion 11312, the first pressing head 11314 is located outside the first connecting hole 1121 and cooperates with the housing 111 to clamp the stator 112.

[0176] The first connection hole 1121 passes through from one outer surface of the stator 112 to the other outer surface of the stator 112. The first connection hole 1121 can pass through the stator 112 along any direction. For example, the first connection hole 1121 passes through two opposite surfaces of the stator 112 along the axial direction of the motor 110.

[0177] The first pressing head 11314 is a part of the first connecting portion 11311 used to press against the stator 112. The first pressing head 11314 is connected to one end of the first connecting rod 11313, and the second connecting portion 11312 is connected to the other end of the first connecting rod 11313. The first pressing head 11314, the first connecting rod 11313 and the second connecting portion 11312 can be an integrally formed component, for example, the first pressing head 11314, the first connecting rod 11313 and the second connecting portion 11312 are integrally formed by a casting process, or the first pressing head 11314, the first connecting rod 11313 and the second connecting portion 11312 can be separately formed and then connected to each other into a whole, for example, the first pressing head 11314 is welded to one end of the first connecting rod 11313, and the second connecting portion 11312 is welded to the other end of the first connecting rod 11313.

[0178] The first pressing head 11314 cooperates with the shell 111 to clamp the stator 112, which means that when the second connecting portion 11312 is connected to the shell 111, the first pressing head 11314 is located on one side of the stator 112 and applies pressure to the stator 112, at least a portion of the shell 111 is located on the side of the stator 112 facing away from the first pressing head 11314 and applies pressure to the stator 112, and the pressure applied by the first pressing head 11314 on the stator 112 is equal in magnitude and opposite in direction to the pressure applied by the shell 111 on the stator 112, so that the stator 112 is fixed between the first pressing head 11314 and at least a portion of the shell 111.

[0179] In some embodiments, the housing 111 may include a shell 1111 and a connecting seat 1112, the shell 1111 has a cavity 11111, the connecting seat 1112 is arranged in the cavity 11111 and connected to the cavity wall of the cavity 11111, the second connecting portion 11312 is connected to the connecting seat 1112, and the first pressing head 11314 cooperates with the connecting seat 1112 to clamp the stator 112.

[0180] By adopting the above technical solution, the relative position of the stator 112 and the housing 111 is effectively limited, so that the stator 112 is effectively fixed in the housing 111.

[0181] In some embodiments of this application, please refer to Figures 4 to 6 The first insulating member 1132 also includes a second insulating portion 1132b and a third insulating portion 1132c. The second insulating portion 1132b is clamped between the stator 112 and the first pressure head 11314. The third insulating portion 1132c is arranged at an end of the first insulating portion 1132a away from the first pressure head 11314 and is clamped between the stator 112 and the housing 111.

[0182] The second insulating portion 1132b is a portion of the first insulating member 1132 used to insulate and separate the stator 112 from the first pressure head 11314. The third insulating portion 1132c is a portion of the first insulating member 1132 used to insulate and separate the stator 112 from the housing 111. The second insulating part 1132b is connected to one end of the first insulating part 1132a close to the first pressure head 11314, and the third insulating part 1132c is connected to one end of the first insulating part 1132a away from the first pressure head 11314. The first insulating part 1132a, the second insulating part 1132b and the third insulating part 1132c can be an integrally molded component. For example, the first insulating part 1132a, the second insulating part 1132b and the third insulating part 1132c are integrally molded using an injection molding process. The first insulating part 1132a, the second insulating part 1132b and the third insulating part 1132c can also be molded separately and then connected to each other into a whole. For example, the second insulating part 1132b is bonded to one end of the first insulating part 1132a close to the first pressure head 11314, and the third insulating part 1132c is bonded to one end of the first insulating part 1132a away from the first pressure head 11314.

[0183] In some embodiments, when the housing 111 may include a shell 1111 and a connecting seat 1112, the second insulating portion 1132b is clamped between the stator 112 and the first pressure head 11314 to insulate the stator 112 and the first pressure head 11314 from each other, and the third insulating portion 1132c is clamped between the stator 112 and the connecting seat 1112 to insulate the stator 112 and the connecting seat 1112 from each other.

[0184] By adopting the above technical solution, the stator 112 and the first connecting rod 11313 can be insulated and separated by the first insulating part 1132a, the stator 112 and the first pressure head 11314 can be insulated and separated by the second insulating part 1132b, and the part of the shell 111 used to connect the stator 112 can also be insulated and separated from the stator 112 by the third insulating part 1132c, thereby further improving the insulation effect between the stator 112 and the shell 111, making it difficult for the current on the stator 112 to be transmitted to the bearing 115 of the motor 110 through the shell 111, thereby effectively reducing the risk of electrical corrosion of the bearing 115 and effectively improving the performance of the motor 110.

[0185] In some embodiments of the present application, the second connection portion 11312 is threadedly connected to the housing 111 .

[0186] In some embodiments, a threaded hole is provided at a portion of the outer shell 111 used to connect to the stator 112. For example, when the outer shell 111 may include a shell body 1111 and a connecting seat 1112, the connecting seat 1112 is provided with a threaded hole, and an outer wall of the second connecting part 11312 is provided with an external thread. The external thread of the second connecting part 11312 cooperates with the internal thread of the threaded hole so that the second connecting part 11312 is threadedly connected to the outer shell 111.

[0187] In other embodiments, the outer wall surface of the portion of the outer shell 111 used to connect to the stator 112 is provided with an external thread. For example, when the outer shell 111 may include a shell body 1111 and a connecting seat 1112, the outer wall surface of the connecting seat 1112 is provided with an external thread, and the second connecting portion 11312 is provided with a threaded hole. The internal thread of the threaded hole cooperates with the external thread of the outer shell 111, so that the second connecting portion 11312 is threadedly connected to the outer shell 111.

[0188] By adopting the above technical solution, it is convenient to connect the connecting member 1131 and the housing 111.

[0189] In some embodiments of this application, please refer to Figure 7 and Figure 8 The stator 112 is provided with a first embedded hole 1122 , the first insulating member 1132 includes a fourth insulating portion 1132 d , the fourth insulating portion 1132 d is fixedly disposed in the first embedded hole 1122 , and the first connecting portion 11311 is connected to the fourth insulating portion 1132 d .

[0190] The first embedded hole 1122 is a hole structure used to limit the position of the fourth insulating portion 1132 d so that the fourth insulating portion 1132 d and the stator 112 are relatively fixed.

[0191] The fourth insulating portion 1132d is not only used to insulate and separate the first connection portion 11311 from the stator 112, but also used to connect the first connection portion 11311 and the stator 112. In other words, in this embodiment, the first connection portion 11311 and the stator 112 are indirectly connected through the fourth insulating portion 1132d. The fourth insulating portion 1132d can be firstly formed in the first embedded hole 1122. For example, an insulating material can be injected into the first embedded hole 1122 by an injection molding process, and the fourth insulating portion 1132d is formed after the insulating material is solidified, so that the fourth insulating portion 1132d can be tightly combined with the hole wall of the first embedded hole 1122, so that the fourth insulating portion 1132d is fixed in the first embedded hole 1122, and then the first connection portion 11311 is connected to the fourth insulating portion 1132d. The connection method between the first connection portion 11311 and the fourth insulating portion 1132d can be, but not limited to, threaded connection, bonding, etc.

[0192] By adopting the above technical solution, the stator 112 and the first connecting part 11311 are effectively insulated and separated, so that the current on the stator 112 is difficult to be transmitted to the housing 111 through the connecting piece 1131, thereby effectively improving the insulation effect between the stator 112 and the housing 111. Correspondingly, the current on the stator 112 is also difficult to be transmitted to the bearing 115 of the motor 110 through the housing 111, thereby effectively reducing the risk of electrical corrosion of the bearing 115 and effectively improving the performance of the motor 110.

[0193] In some embodiments of this application, please refer to Figure 8 A second connecting hole 11121 is opened on the housing 111 , the second connecting portion 11312 includes a second connecting rod 11315 , the first connecting portion 11311 is connected to one end of the second connecting rod 11315 , and the second connecting rod 11315 is inserted into the second connecting hole 11121 .

[0194] The second connecting hole 11121 is a hole structure of the stator 112 for connecting the second connecting rod 11315. The second connecting hole 11121 can be a through hole or a blind hole.

[0195] By adopting the above technical solution, it is convenient to connect the connecting member 1131 and the housing 111.

[0196] In some embodiments of the present application, the second connecting rod 11315 is interference fit with the hole wall of the second connecting hole 11121.

[0197] The interference fit between the second connecting rod 11315 and the hole wall of the second connecting hole 11121 means that: the outer diameter of the second connecting rod 11315 is slightly larger than the hole diameter of the second connecting hole 11121, and when the second connecting rod 11315 is inserted into the second connecting hole 11121, the outer peripheral wall of the second connecting rod 11315 and the hole wall of the second connecting hole 11121 are squeezed against each other, so that the second connecting rod 11315 is fixedly disposed in the second connecting hole 11121.

[0198] By adopting the above technical solution, the housing 111 is effectively fixed on the second connecting rod 11315.

[0199] In some embodiments of this application, please refer to Figure 8 The second connecting hole 11121 is a through hole, the second connecting rod 11315 is passed through the second connecting hole 11121, and the second connecting portion 11312 also includes a second pressing head 11316 connected to an end of the second connecting rod 11315 away from the first connecting portion 11311. The second pressing head 11316 is located outside the second connecting hole 11121 and cooperates with the stator 112 to clamp at least a portion of the housing 111.

[0200] The second connection hole 11121 passes through from one outer surface of the portion of the shell 111 used to connect to the stator 112 to the other outer surface of the portion. The second connection hole 11121 can pass through the portion of the shell 111 used to connect to the stator 112 along any direction. For example, the second connection hole 11121 passes through the two opposite surfaces of the portion of the shell 111 used to connect to the stator 112 along the axial direction of the motor 110.

[0201] The second pressing head 11316 is a part of the second connecting portion 11312 used to press against the housing 111. The second pressing head 11316 is connected to one end of the second connecting rod 11315, and the first connecting portion 11311 is connected to the other end of the second connecting rod 11315. The second pressing head 11316, the second connecting rod 11315 and the first connecting portion 11311 can be an integrally formed component, for example, the second pressing head 11316, the second connecting rod 11315 and the first connecting portion 11311 are integrally formed by a casting process, and the second pressing head 11316, the second connecting rod 11315 and the first connecting portion 11311 can also be separately formed and then connected to each other into a whole, for example, the second pressing head 11316 is welded to one end of the second connecting rod 11315, and the first connecting portion 11311 is welded to the other end of the second connecting rod 11315.

[0202] The second pressing head 11316 cooperates with the stator 112 to clamp at least part of the shell 111, which means that when the first connecting portion 11311 is connected to the stator 112, the second pressing head 11316 is located on one side of the portion of the shell 111 used to connect the stator 112 and applies pressure to the portion, and the stator 112 is located on the side of the portion of the shell 111 used to connect the stator 112 that is away from the second pressing head 11316 and applies pressure to the portion, and the pressure applied by the second pressing head 11316 on the portion of the shell 111 used to connect the stator 112 is equal in magnitude and opposite in direction to the pressure applied by the stator 112 on the portion of the shell 111 used to connect the stator 112, so that the portion of the shell 111 used to connect the stator 112 is fixed between the second pressing head 11316 and the stator 112.

[0203] In some embodiments, the housing 111 may include a shell 1111 and a connecting seat 1112, the shell 1111 has a cavity 11111, the connecting seat 1112 is arranged in the cavity 11111 and connected to the cavity wall of the cavity 11111, the first connecting portion 11311 is connected to the stator 112, and the second pressure head 11316 cooperates with the stator 112 to clamp the connecting seat 1112.

[0204] By adopting the above technical solution, the relative position of the stator 112 and the housing 111 is effectively limited, so that the stator 112 is effectively fixed in the housing 111.

[0205] In some embodiments of this application, please refer to Figure 8 The first insulating member 1132 further includes a fifth insulating portion 1132 e , which is disposed at the opening end of the first embedded hole 1122 and is sandwiched between the stator 112 and the housing 111 .

[0206] The fifth insulating portion 1132e is a portion of the first insulating member 1132 used to insulate and separate the stator 112 from the housing 111. The fifth insulating portion 1132e is connected to one end of the fourth insulating portion 1132d close to the second pressure head 11316. The fourth insulating portion 1132d and the fifth insulating portion 1132e may be integrally formed components, for example, the fourth insulating portion 1132d and the fifth insulating portion 1132e are integrally formed by injection molding, and the fourth insulating portion 1132d and the fifth insulating portion 1132e may also be separately formed and then connected to each other into a whole, for example, the fifth insulating portion 1132e is bonded to one end of the fourth insulating portion 1132d close to the second pressure head 11316.

[0207] In some embodiments, when the housing 111 may include a shell 1111 and a connection base 1112 , the fifth insulating portion 1132 e is sandwiched between the stator 112 and the connection base 1112 to insulate the stator 112 and the connection base 1112 from each other.

[0208] By adopting the above technical solution, the stator 112 and the first connecting part 11311 can be insulated and separated by the fourth insulating part 1132d, and the part of the outer shell 111 used to connect the stator 112 can also be insulated and separated from the stator 112 by the fifth insulating part 1132e, thereby further improving the insulation effect between the stator 112 and the outer shell 111, making it difficult for the current on the stator 112 to be transmitted to the bearing 115 of the motor 110 through the outer shell 111, thereby effectively reducing the risk of electrical corrosion of the bearing 115 and effectively improving the performance of the motor 110.

[0209] In some embodiments of the present application, the first connection portion 11311 is threadedly connected to the fourth insulating portion 1132d.

[0210] In some embodiments, the fourth insulating portion 1132d is provided with a threaded hole, the outer wall of the first connecting portion 11311 is provided with external threads, and the external threads of the first connecting portion 11311 cooperate with the internal threads of the threaded hole to threadably connect the first connecting portion 11311 to the fourth insulating portion 1132d.

[0211] In other embodiments, at least a portion of the fourth insulating portion 1132d protrudes toward the outside of the first embedded hole 1122, and an outer wall surface of the portion of the fourth insulating portion 1132d protruding from the first embedded hole 1122 is provided with an external thread, and the first connecting portion 11311 is provided with a threaded hole, and the internal thread of the threaded hole cooperates with the external thread of the fourth insulating portion 1132d, so that the first connecting portion 11311 is threadedly connected to the fourth insulating portion 1132d.

[0212] By adopting the above technical solution, it is convenient to connect the connecting piece 1131 and the stator 112.

[0213] In some embodiments of this application, please refer to Figure 8 The fourth insulating portion 1132 d covers the end surface of the first connecting portion 11311 facing away from the second connecting portion 11312 and the outer peripheral wall of the first connecting portion 11311 .

[0214] In some embodiments, the fourth insulating portion 1132d covers the entire hole wall of the first embedded hole 1122, and the side of the hole wall of the fourth insulating portion 1132d facing away from the first embedded hole 1122 defines a connection space, and the first connection portion 11311 is connected in the connection space, so that the fourth insulating portion 1132d is covered by the end surface of the first connection portion 11311 facing away from the second connection portion 11312 and the outer peripheral wall of the first connection portion 11311, so that the end surface of the first connection portion 11311 facing away from the second connection portion 11312 and the outer peripheral wall of the first connection portion 11311 are insulated and separated from the hole wall of the first embedded hole 1122 by the fourth insulating portion 1132d.

[0215] By adopting the above technical solution, the insulation effect between the first connecting portion 11311 and the stator 112 is effectively improved.

[0216] In some embodiments of this application, please refer to Figures 9 to 13 At least a portion of the first insulating member 1132 is disposed between the second connecting portion 11312 and the housing 111 , so that the housing 111 and the second connecting portion 11312 are insulated from each other.

[0217] In other words, in this embodiment, the first insulating member 1132 is arranged between the outer shell 111 and the connecting member 1131. A part of the first insulating member 1132 may be arranged between the outer shell 111 and the second connecting portion 11312, or the entire first insulating member 1132 may be arranged between the outer shell 111 and the second connecting portion 11312, so that the outer shell 111 and the second connecting portion 11312 are insulated from each other.

[0218] By adopting the above technical solution, the housing 111 and the second connecting part 11312 are effectively insulated and separated, so that the current on the stator 112 is difficult to be transmitted to the housing 111 through the connecting piece 1131, thereby effectively improving the insulation effect between the stator 112 and the housing 111. Correspondingly, the current on the stator 112 is also difficult to be transmitted to the bearing 115 of the motor 110 through the housing 111, thereby effectively reducing the risk of electrical corrosion of the bearing 115 and effectively improving the performance of the motor 110.

[0219] In some embodiments of this application, please refer to Fig. 9 and Fig.10 A second connecting hole 11121 is provided on the outer shell 111, the second connecting portion 11312 includes a second connecting rod 11315, the first connecting portion 11311 is connected to one end of the second connecting rod 11315, the second connecting rod 11315 is inserted into the second connecting hole 11121, and the first insulating member 1132 includes a sixth insulating portion 1132f, which is arranged between the second connecting rod 11315 and the hole wall of the second connecting hole 11121.

[0220] The second connecting hole 11121 is a hole structure of the housing 111 for connecting the second connecting rod 11315. The second connecting hole 11121 can be a through hole or a blind hole.

[0221] The second connecting rod 11315 is inserted into the second connecting hole 11121, and the sixth insulating part 1132f is arranged between the second connecting rod 11315 and the hole wall of the second connecting hole 11121. In other words, when the second connecting rod 11315 is inserted into the second connecting hole 11121, a gap is formed between the outer peripheral wall of the second connecting rod 11315 and the hole wall of the second connecting hole 11121, and the sixth insulating part 1132f is arranged in the gap to insulate and separate the second connecting rod 11315 from the hole wall of the second connecting hole 11121.

[0222] By adopting the above technical solution, the housing 111 and the second connecting rod 11315 are effectively insulated and separated, making it difficult for the current on the stator 112 to be transmitted to the housing 111 through the connecting piece 1131, thereby effectively improving the insulation effect between the stator 112 and the housing 111. Correspondingly, the current on the stator 112 is also difficult to be transmitted to the bearing 115 of the motor 110 through the housing 111, thereby effectively reducing the risk of electrical corrosion of the bearing 115 and effectively improving the performance of the motor 110.

[0223] In some embodiments of the present application, the sixth insulating portion 1132f is interference fit between the second connecting rod 11315 and the hole wall of the second connecting hole 11121 .

[0224] The interference fit of the sixth insulating part 1132f between the second connecting rod 11315 and the hole wall of the second connecting hole 11121 means that: the outer diameter of the whole formed by the sixth insulating part 1132f and the second connecting rod 11315 is slightly larger than the hole diameter of the second connecting hole 11121, and when the second connecting rod 11315 is inserted into the second connecting hole 11121 and the sixth insulating part 1132f is arranged between the second connecting rod 11315 and the hole wall of the second connecting hole 11121, the outer peripheral wall of the second connecting rod 11315 cooperates with the hole wall of the second connecting hole 11121 to squeeze the sixth insulating part 1132f, so that the second connecting rod 11315 is fixedly arranged in the second connecting hole 11121.

[0225] In some embodiments, in order to facilitate interference fit of the sixth insulating portion 1132f between the second connecting rod 11315 and the hole wall of the second connecting hole 11121, the sixth insulating portion 1132f can be made of an elastic insulating material, so that in the process of setting the sixth insulating portion 1132f between the second connecting rod 11315 and the hole wall of the second connecting hole 11121, the sixth insulating portion 1132f can be elastically compressed under the action of the outer peripheral wall of the second connecting rod 11315 and the hole wall of the second connecting hole 11121, until the sixth insulating portion 1132f completely enters the gap between the outer peripheral wall of the second connecting rod 11315 and the hole wall of the second connecting hole 11121. The elastic insulating material can be, but is not limited to, rubber, elastic plastic, etc.

[0226] By adopting the above technical solution, not only the outer shell 111 and the second connecting rod 11315 are effectively insulated and separated, but also the outer shell 111 and the second connecting rod 11315 are effectively fixedly connected.

[0227] In some embodiments of this application, please refer to Fig.10 The sixth insulating portion 1132f has a cylindrical structure and is sleeved on the second connecting rod 11315.

[0228] The sixth insulating portion 1132 f is sleeved on the second connecting rod 11315 . In other words, the sixth insulating portion 1132 f covers the outer peripheral wall of the second connecting rod 11315 .

[0229] In some embodiments, the cross-sectional shape of the inner cavity of the sixth insulating part 1132f is adapted to the cross-sectional shape of the second connecting rod 11315. For example, the cross-sectional shape of the inner cavity of the sixth insulating part 1132f and the cross-sectional shape of the second connecting rod 11315 are both circular, and the inner wall of the sixth insulating part 1132f is in contact with the outer peripheral wall of the second connecting rod 11315.

[0230] In some embodiments, the length of the sixth insulating portion 1132f is greater than or equal to the length of the second connecting hole 11121, so that the sixth insulating portion 1132f can completely fill the gap between the outer peripheral wall of the second connecting rod 11315 and the hole wall of the second connecting hole 11121, thereby more effectively insulating and separating the outer shell 111 and the second connecting rod 11315.

[0231] By adopting the above technical solution, the sixth insulating portion 1132f can better cover the outer peripheral wall of the second connecting rod 11315, thereby more effectively insulating and separating the housing 111 and the second connecting rod 11315.

[0232] In some embodiments of this application, please refer to Fig.10 The second connecting hole 11121 is a through hole, the second connecting rod 11315 is passed through the second connecting hole 11121, and the second connecting portion 11312 also includes a second pressing head 11316 connected to an end of the second connecting rod 11315 away from the first connecting portion 11311. The second pressing head 11316 is located outside the second connecting hole 11121 and cooperates with the stator 112 to clamp at least a portion of the housing 111.

[0233] The second connection hole 11121 passes through from one outer surface of the portion of the shell 111 used to connect to the stator 112 to the other outer surface of the portion. The second connection hole 11121 can pass through the portion of the shell 111 used to connect to the stator 112 along any direction. For example, the second connection hole 11121 passes through the two opposite surfaces of the portion of the shell 111 used to connect to the stator 112 along the axial direction of the motor 110.

[0234] The second pressing head 11316 is a part of the second connecting portion 11312 used to press against the housing 111. The second pressing head 11316 is connected to one end of the second connecting rod 11315, and the first connecting portion 11311 is connected to the other end of the second connecting rod 11315. The second pressing head 11316, the second connecting rod 11315 and the first connecting portion 11311 can be an integrally formed component, for example, the second pressing head 11316, the second connecting rod 11315 and the first connecting portion 11311 are integrally formed by a casting process, and the second pressing head 11316, the second connecting rod 11315 and the first connecting portion 11311 can also be separately formed and then connected to each other into a whole, for example, the second pressing head 11316 is welded to one end of the second connecting rod 11315, and the first connecting portion 11311 is welded to the other end of the second connecting rod 11315.

[0235] The second pressing head 11316 cooperates with the stator 112 to clamp at least part of the shell 111, which means that when the first connecting portion 11311 is connected to the stator 112, the second pressing head 11316 is located on one side of the portion of the shell 111 used to connect the stator 112 and applies pressure to the portion, and the stator 112 is located on the side of the portion of the shell 111 used to connect the stator 112 that is away from the second pressing head 11316 and applies pressure to the portion, and the pressure applied by the second pressing head 11316 on the portion of the shell 111 used to connect the stator 112 is equal in magnitude and opposite in direction to the pressure applied by the stator 112 on the portion of the shell 111 used to connect the stator 112, so that the portion of the shell 111 used to connect the stator 112 is fixed between the second pressing head 11316 and the stator 112.

[0236] In some embodiments, the shell 111 may include a shell 1111 and a connecting seat 1112, the shell 1111 has a cavity 11111, the connecting seat 1112 is arranged in the cavity 11111 and connected to the cavity wall of the cavity 11111, the connecting seat 1112 is provided with the above-mentioned second connecting hole 11121, the second connecting rod 11315 is passed through the second connecting hole 11121, the first connecting part 11311 is connected to the stator 112, and the second pressure head 11316 cooperates with the stator 112 to clamp the connecting seat 1112.

[0237] By adopting the above technical solution, the relative position of the stator 112 and the housing 111 is effectively limited, so that the stator 112 is effectively fixed in the housing 111.

[0238] In some embodiments of this application, please refer to Fig.10 The first insulating member 1132 also includes a seventh insulating portion 1132g and an eighth insulating portion 1132h. The seventh insulating portion 1132g is clamped between the shell 111 and the second pressure head 11316. The eighth insulating portion 1132h is arranged at an end of the sixth insulating portion 1132f away from the second pressure head 11316 and is clamped between the stator 112 and the shell 111.

[0239] The seventh insulating portion 1132g is a portion of the first insulating member 1132 used to insulate and separate the housing 111 from the second pressure head 11316. The eighth insulating portion 1132h is a portion of the first insulating member 1132 used to insulate and separate the stator 112 from the housing 111. The seventh insulating part 1132g is connected to one end of the sixth insulating part 1132f close to the second pressure head 11316, and the eighth insulating part 1132h is connected to one end of the sixth insulating part 1132f away from the second pressure head 11316. The sixth insulating part 1132f, the seventh insulating part 1132g and the eighth insulating part 1132h can be an integrally molded component. For example, the sixth insulating part 1132f, the seventh insulating part 1132g and the eighth insulating part 1132h are integrally molded using an injection molding process. The sixth insulating part 1132f, the seventh insulating part 1132g and the eighth insulating part 1132h can also be molded separately and then connected to each other into a whole. For example, the seventh insulating part 1132g is bonded to one end of the sixth insulating part 1132f close to the second pressure head 11316, and the eighth insulating part 1132h is bonded to one end of the sixth insulating part 1132f away from the second pressure head 11316.

[0240] In some embodiments, when the housing 111 may include a shell body 1111 and a connecting seat 1112, the seventh insulating portion 1132g is clamped between the connecting seat 1112 and the second pressure head 11316 to insulate the connecting seat 1112 and the second pressure head 11316 from each other, and the eighth insulating portion 1132h is clamped between the stator 112 and the connecting seat 1112 to insulate the stator 112 and the connecting seat 1112 from each other.

[0241] By adopting the above technical solution, the shell 111 and the second connecting rod 11315 can be insulated and separated by the sixth insulating part 1132f, the shell 111 and the second pressure head 11316 can be insulated and separated by the seventh insulating part 1132g, and the part of the shell 111 used to connect the stator 112 can also be insulated and separated from the stator 112 by the eighth insulating part 1132h, thereby further improving the insulation effect between the stator 112 and the shell 111, making it difficult for the current on the stator 112 to be transmitted to the bearing 115 of the motor 110 through the shell 111, thereby effectively reducing the risk of electrical corrosion of the bearing 115 and effectively improving the performance of the motor 110.

[0242] In some embodiments of the present application, the first connection portion 11311 is threadedly connected to the stator 112 .

[0243] In some embodiments, the stator 112 is provided with a threaded hole, and the outer wall of the first connecting portion 11311 is provided with external threads. The external threads of the first connecting portion 11311 match the internal threads of the threaded hole so that the first connecting portion 11311 is threadedly connected to the stator 112 .

[0244] By adopting the above technical solution, it is convenient to connect the connecting piece 1131 and the stator 112.

[0245] In some embodiments of this application, please refer to Figures 11 to 13 The housing 111 is provided with a second embedded hole 11122 , the first insulating member 1132 includes a ninth insulating portion 1132i , the ninth insulating portion 1132i is fixedly disposed in the second embedded hole 11122 , and the second connecting portion 11312 is connected to the ninth insulating portion 1132i .

[0246] The second embedded hole 11122 is a hole structure used to limit the position of the ninth insulating portion 1132 i so that the ninth insulating portion 1132 i and the housing 111 are relatively fixed.

[0247] The ninth insulating portion 1132i is not only used to insulate and separate the second connection portion 11312 from the housing 111, but also used to connect the second connection portion 11312 and the housing 111. In other words, in this embodiment, the second connection portion 11312 is indirectly connected to the housing 111 through the ninth insulating portion 1132i. The ninth insulating portion 1132i can be first molded in the second embedded hole 11122. For example, an injection molding process can be used to inject an insulating material into the second embedded hole 11122. After the insulating material is solidified, the ninth insulating portion 1132i is formed, so that the ninth insulating portion 1132i can be tightly combined with the hole wall of the second embedded hole 11122, so that the ninth insulating portion 1132i is fixed in the second embedded hole 11122, and then the second connection portion 11312 is connected to the ninth insulating portion 1132i. The connection method between the second connection portion 11312 and the ninth insulating portion 1132i can be, but not limited to, threaded connection, bonding, etc.

[0248] By adopting the above technical solution, the housing 111 and the second connecting part 11312 are effectively insulated and separated, so that the current on the stator 112 is difficult to be transmitted to the housing 111 through the connecting piece 1131, thereby effectively improving the insulation effect between the stator 112 and the housing 111. Correspondingly, the current on the stator 112 is also difficult to be transmitted to the bearing 115 of the motor 110 through the housing 111, thereby effectively reducing the risk of electrical corrosion of the bearing 115 and effectively improving the performance of the motor 110.

[0249] In some embodiments of this application, please refer to Fig.12 and Fig.13 The stator 112 is provided with a first connecting hole 1121 , the first connecting portion 11311 includes a first connecting rod 11313 , the second connecting portion 11312 is connected to one end of the first connecting rod 11313 , and the first connecting rod 11313 is inserted into the first connecting hole 1121 .

[0250] The first connection hole 1121 is a hole structure of the stator 112 for connecting the first connecting rod 11313 . The first connection hole 1121 may be a through hole or a blind hole.

[0251] By adopting the above technical solution, it is convenient to connect the connecting piece 1131 and the stator 112.

[0252] In some embodiments of the present application, the first connecting rod 11313 is interference fit with the hole wall of the first connecting hole 1121 .

[0253] The interference fit between the first connecting rod 11313 and the hole wall of the first connecting hole 1121 means that: the outer diameter of the first connecting rod 11313 is slightly larger than the hole diameter of the first connecting hole 1121, and when the first connecting rod 11313 is inserted into the first connecting hole 1121, the outer peripheral wall of the first connecting rod 11313 and the hole wall of the first connecting hole 1121 are squeezed against each other, so that the first connecting rod 11313 is fixedly disposed in the first connecting hole 1121.

[0254] By adopting the above technical solution, the stator 112 is effectively fixed on the first connecting rod 11313.

[0255] In some embodiments of this application, please refer to Fig.12 and Fig.13 The first connecting hole 1121 is a through hole, the first connecting rod 11313 is passed through the first connecting hole 1121, the first connecting portion 11311 also includes a first pressing head 11314 connected to one end of the first connecting rod 11313 away from the second connecting portion 11312, the first pressing head 11314 is located outside the first connecting hole 1121 and cooperates with the housing 111 to clamp the stator 112.

[0256] The first connection hole 1121 passes through from one outer surface of the stator 112 to the other outer surface of the stator 112. The first connection hole 1121 can pass through the stator 112 along any direction. For example, the first connection hole 1121 passes through two opposite surfaces of the stator 112 along the axial direction of the motor 110.

[0257] The first pressing head 11314 is a part of the first connecting portion 11311 used to press against the stator 112. The first pressing head 11314 is connected to one end of the first connecting rod 11313, and the second connecting portion 11312 is connected to the other end of the first connecting rod 11313. The first pressing head 11314, the first connecting rod 11313 and the second connecting portion 11312 can be an integrally formed component, for example, the first pressing head 11314, the first connecting rod 11313 and the second connecting portion 11312 are integrally formed by a casting process, or the first pressing head 11314, the first connecting rod 11313 and the second connecting portion 11312 can be separately formed and then connected to each other into a whole, for example, the first pressing head 11314 is welded to one end of the first connecting rod 11313, and the second connecting portion 11312 is welded to the other end of the first connecting rod 11313.

[0258] The first pressing head 11314 cooperates with the shell 111 to clamp the stator 112, which means that when the second connecting portion 11312 is connected to the shell 111, the first pressing head 11314 is located on one side of the stator 112 and applies pressure to the stator 112; the portion of the shell 111 used to connect the stator 112 is located on the side of the stator 112 facing away from the first pressing head 11314 and applies pressure to the stator 112; the pressure exerted on the stator 112 by the first pressing head 11314 is equal in magnitude to the pressure exerted on the stator 112 by the portion of the shell 111 used to connect the stator 112 and is opposite in direction, so that the stator 112 is fixed between the first pressing head 11314 and the shell 111.

[0259] In some embodiments, the housing 111 may include a shell 1111 and a connecting seat 1112, the shell 1111 has a cavity 11111, the connecting seat 1112 is arranged in the cavity 11111 and connected to the cavity wall of the cavity 11111, the second connecting portion 11312 is connected to the connecting seat 1112, and the first pressing head 11314 cooperates with the connecting seat 1112 to clamp the stator 112.

[0260] By adopting the above technical solution, the relative position of the stator 112 and the housing 111 is effectively limited, so that the stator 112 is effectively fixed in the housing 111.

[0261] In some embodiments of this application, please refer to Fig.12 and Fig.13 The first insulating member 1132 further includes a tenth insulating portion 1132 j , which is disposed at the opening end of the second embedded hole 11122 and is sandwiched between the stator 112 and the housing 111 .

[0262] The tenth insulating portion 1132j is a portion of the first insulating member 1132 used to insulate and separate the stator 112 from the housing 111. The tenth insulating portion 1132j is connected to one end of the ninth insulating portion 1132i close to the first pressure head 11314. The ninth insulating portion 1132i and the tenth insulating portion 1132j may be integrally formed components, for example, the ninth insulating portion 1132i and the tenth insulating portion 1132j may be integrally formed using an injection molding process, and the ninth insulating portion 1132i and the tenth insulating portion 1132j may also be separately formed and then connected to each other into a whole, for example, the tenth insulating portion 1132j is bonded to one end of the ninth insulating portion 1132i close to the first pressure head 11314.

[0263] In some embodiments, when the housing 111 may include a shell 1111 and a connection base 1112 , the tenth insulating portion 1132 j is sandwiched between the stator 112 and the connection base 1112 to insulate the stator 112 and the connection base 1112 from each other.

[0264] By adopting the above technical solution, the shell 111 and the second connecting part 11312 can be insulated and separated by the ninth insulating part 1132i, and the part of the shell 111 used to connect the stator 112 can also be insulated and separated from the stator 112 by the tenth insulating part 1132j, thereby further improving the insulation effect between the stator 112 and the shell 111, making it difficult for the current on the stator 112 to be transmitted to the bearing 115 of the motor 110 through the shell 111, thereby effectively reducing the risk of electrical corrosion of the bearing 115 and effectively improving the performance of the motor 110.

[0265] In some embodiments of the present application, the second connection portion 11312 is threadedly connected to the ninth insulating portion 1132i.

[0266] In some embodiments, the ninth insulating portion 1132i is provided with a threaded hole, and the outer wall of the second connecting portion 11312 is provided with an external thread, and the external thread of the second connecting portion 11312 cooperates with the internal thread of the threaded hole to threadably connect the second connecting portion 11312 to the ninth insulating portion 1132i.

[0267] In other embodiments, at least a portion of the ninth insulating portion 1132i protrudes toward the outside of the second embedded hole 11122, the outer wall surface of the portion of the ninth insulating portion 1132i protruding from the second embedded hole 11122 is provided with an external thread, and the second connecting portion 11312 is provided with a threaded hole, and the internal thread of the threaded hole cooperates with the external thread of the ninth insulating portion 1132i, so that the second connecting portion 11312 is threadedly connected to the ninth insulating portion 1132i.

[0268] By adopting the above technical solution, it is convenient to connect the connecting member 1131 and the housing 111.

[0269] In some embodiments of this application, please refer to Fig.12 The ninth insulating portion 1132i covers the end surface of the second connecting portion 11312 facing away from the first connecting portion 11311 and the outer peripheral wall of the second connecting portion 11312.

[0270] In some embodiments, the ninth insulating portion 1132i covers the entire hole wall of the second embedded hole 11122, and the side of the hole wall of the ninth insulating portion 1132i facing away from the second embedded hole 11122 defines a connection space, and the second connection portion 11312 is connected in the connection space, so that the ninth insulating portion 1132i is covered by the end face of the second connection portion 11312 facing away from the first connection portion 11311 and the outer peripheral wall of the second connection portion 11312, so that the end face of the second connection portion 11312 facing away from the first connection portion 11311 and the outer peripheral wall of the second connection portion 11312 are insulated and separated from the hole wall of the second embedded hole 11122 by the ninth insulating portion 1132i.

[0271] By adopting the above technical solution, the insulation effect between the second connecting portion 11312 and the housing 111 is effectively improved.

[0272] In some embodiments of this application, please refer to Figures 4 to 13 The connecting member 1131 connects the stator 112 and the housing 111 along the axial direction of the motor 110 .

[0273] In some embodiments, please refer to Figures 4 to 6 as well as Figures 11 to 13 The housing 111 may include a housing 1111 and a connection seat 1112, the housing 1111 having a cavity 11111, the connection seat 1112 being disposed in the cavity 11111 and connected to the cavity wall of the cavity 11111, the stator 112 being provided with a first connection hole 1121, the first connection hole 1121 penetrating through opposite sides of the stator 112 along the axis direction of the motor 110, the connection member 1131 including a first connection portion 11311 and a second connection portion 11312, the first connection portion 11311 includes a first connecting rod 11313 and a first pressing head 11314. The first connecting rod 11313 is inserted into the first connecting hole 1121. The first pressing head 11314 is connected to one end of the first connecting rod 11313. The second connecting portion 11312 is connected to the other end of the first connecting rod 11313. The second connecting portion 11312 is connected to the connecting seat 1112. The first pressing head 11314 and the connecting seat 1112 cooperate to clamp the stator 112 along the axial direction of the motor 110.

[0274] In other embodiments, please refer to Figures 7 to 10The housing 111 may include a shell 1111 and a connecting seat 1112, the shell 1111 has a cavity 11111, the connecting seat 1112 is arranged in the cavity 11111 and connected to the cavity wall of the cavity 11111, the connecting seat 1112 is provided with a second connecting hole 11121, and the second connecting hole 11121 passes through the opposite sides of the connecting seat 1112 along the axial direction of the motor 110, the connecting member 1131 includes a first connecting portion 11311 and a second connecting portion 11312, and the first connecting portion 11311 is provided with a second connecting hole 11121. The second connecting part 11312 includes a second connecting rod 11315 and a second pressing head 11316. The second connecting rod 11315 is inserted into the second connecting hole 11121. The second pressing head 11316 is connected to one end of the second connecting rod 11315. The first connecting part 11311 is connected to the other end of the second connecting rod 11315. The first connecting part 11311 is connected to the stator 112. The second pressing head 11316 cooperates with the stator 112 to clamp the connecting seat 1112 along the axial direction of the motor 110.

[0275] By adopting the above technical solution, the relative positions of the stator 112 and the housing 111 along the axial direction of the motor 110 are effectively limited, so that the stator 112 and the housing 111 can be relatively fixed along the axial direction of the motor 110 .

[0276] In some embodiments of this application, please refer to Fig.14 The insulating connection member 113 includes a second insulating member 1133 , and the second insulating member 1133 is interference-fitted between the outer peripheral side of the stator 112 and the housing 111 .

[0277] The interference fit of the second insulating member 1133 between the outer peripheral side of the stator 112 and the outer shell 111 means that: the thickness of the second insulating member 1133 is slightly larger than the gap width between the outer peripheral side of the stator 112 and the outer shell 111, and when the second insulating member 1133 is arranged in the gap between the outer peripheral side of the stator 112 and the outer shell 111, the outer peripheral side of the stator 112 and the outer shell 111 cooperate to squeeze the second insulating member 1133, so that the stator 112, the second insulating member 1133 and the outer shell 111 are relatively fixed along the radial direction of the motor 110.

[0278] In some embodiments, in order to facilitate interference fit of the second insulating member 1133 between the outer circumference of the stator 112 and the housing 111, the second insulating member 1133 may be made of an elastic insulating material, so that in the process of arranging the second insulating member 1133 between the outer circumference of the stator 112 and the housing 111, the second insulating member 1133 may be elastically compressed under the action of the cooperation and extrusion of the outer circumference of the stator 112 and the housing 111, until the second insulating member 1133 completely enters the gap between the outer circumference of the stator 112 and the housing 111. The elastic insulating material may be, but is not limited to, rubber, elastic plastic, etc.

[0279] In some embodiments, the second insulating member 1133 may be formed separately and then assembled with the stator 112 into a whole.

[0280] In other embodiments, a thermoplastic molding process may be used to cast an insulating material on the outer peripheral wall of the stator 112 , and the second insulating member 1133 may be formed after the insulating material is solidified.

[0281] In some other embodiments, an insulating varnish may be coated on the outer peripheral wall of the stator 112 , and the second insulating member 1133 may be formed after the insulating varnish is cured.

[0282] By adopting the above technical solution, not only the insulation effect between the stator 112 and the housing 111 is further improved, the current on the stator 112 is difficult to be transmitted to the bearing 115 of the motor 110 through the housing 111, thereby effectively reducing the risk of electrical corrosion of the bearing 115, effectively improving the performance of the motor 110, and effectively limiting the relative position of the stator 112 and the housing 111 along the radial direction of the motor 110, so that the stator 112 and the housing 111 can be relatively fixed along the radial direction of the motor 110.

[0283] In some embodiments of this application, please refer to Fig.14 The second insulating member 1133 is in a cylindrical structure and is sleeved on the outer peripheral side of the stator 112 .

[0284] In some embodiments, the dimension of the second insulating member 1133 along the axial direction of the motor 110 can be greater than or equal to the dimension of the outer peripheral wall of the stator 112 along the axial direction of the motor 110, so that the second insulating member 1133 covers the entire outer peripheral wall of the stator 112, thereby effectively insulating and separating the outer peripheral wall of the stator 112 from the casing 111.

[0285] By adopting the above technical solution, the second insulating member 1133 can better cover the outer peripheral side of the stator 112 , thereby more effectively insulating and separating the outer peripheral side of the stator 112 from the housing 111 .

[0286] In some embodiments of this application, please refer to Fig.14 The insulating connecting component 113 includes a connecting member 1131, a first insulating member 1132 and a second insulating member 1133. The connecting member 1131 connects the stator 112 and the housing 111 along the axial direction of the motor 110. The first insulating member 1132 is arranged between the connecting member 1131 and at least one of the stator 112 and the housing 111 to insulate and separate the stator 112 and at least one of the housing 111 from the connecting member 1131. The second insulating member 1133 is interference fit between the outer peripheral side of the stator 112 and the housing 111 to insulate and separate the outer peripheral wall of the stator 112 from the housing 111.

[0287] By adopting the above technical solution, not only can the stator 112 and the housing 111 be relatively fixed along the axial direction of the motor 110, but the stator 112 and the housing 111 can also be relatively fixed along the radial direction of the motor 110, thereby effectively improving the connection reliability between the stator 112 and the housing 111, and at the same time effectively improving the insulation effect between the stator 112 and the housing 111.

[0288] In some embodiments of this application, please refer to Fig.15 The insulating connection member 113 is interference-fitted between the outer peripheral side of the stator 112 and the housing 111 .

[0289] The interference fit of the insulating connecting member 113 between the outer peripheral side of the stator 112 and the outer shell 111 means that: the thickness of the insulating connecting member 113 is slightly larger than the gap width between the outer peripheral side of the stator 112 and the outer shell 111, and when the insulating connecting member 113 is arranged in the gap between the outer peripheral side of the stator 112 and the outer shell 111, the outer peripheral side of the stator 112 and the outer shell 111 cooperate to squeeze the insulating connecting member 113, so that the stator 112, the insulating connecting member 113 and the outer shell 111 are relatively fixed along the radial direction of the motor 110.

[0290] In this embodiment, the insulating connecting member 113 can be made entirely of insulating material, or partly of insulating material and the other part of rigid material. The insulating material can be rubber, plastic, etc., and the rigid material can be aluminum, copper, steel, etc.

[0291] In some embodiments, the insulating connection member 113 is entirely made of insulating material. For example, the insulating connection member 113 is integrally formed by injection molding.

[0292] In other embodiments, the insulating connecting component 113 includes a supporting layer and an insulating layer. The supporting layer is made of a rigid material, and the insulating layer is made of an insulating material. The insulating layer can be arranged on the side of the supporting layer facing the stator 112, or on the side of the supporting layer facing away from the stator 112.

[0293] In order to facilitate interference fit of the insulating connecting member 113 between the outer circumference of the stator 112 and the housing 111, the insulating material may be an elastic insulating material, so that when the insulating connecting member 113 is arranged between the outer circumference of the stator 112 and the housing 111, the insulating connecting member 113 may be elastically compressed under the action of the cooperation and extrusion of the outer circumference of the stator 112 and the housing 111, until the insulating connecting member 113 completely enters the gap between the outer circumference of the stator 112 and the housing 111. The elastic insulating material may be, but is not limited to, rubber, elastic plastic, etc.

[0294] By adopting the above technical solution, not only the insulation effect between the stator 112 and the housing 111 is effectively improved, making it difficult for the current on the stator 112 to be transmitted to the bearing 115 of the motor 110 through the housing 111, thereby effectively reducing the risk of electrical corrosion of the bearing 115 and effectively improving the performance of the motor 110, but also the relative position of the stator 112 and the housing 111 along the radial direction of the motor 110 is effectively limited, so that the stator 112 and the housing 111 can be relatively fixed along the radial direction of the motor 110.

[0295] In some embodiments of this application, please refer to Fig.15 The insulating connecting component 113 is in a cylindrical structure and is sleeved on the outer peripheral side of the stator 112 .

[0296] In some embodiments, the dimension of the insulating connecting member 113 along the axial direction of the motor 110 can be greater than or equal to the dimension of the outer peripheral wall of the stator 112 along the axial direction of the motor 110, so that the insulating connecting member 113 covers the entire outer peripheral wall of the stator 112, thereby effectively insulating and separating the outer peripheral wall of the stator 112 from the casing 111.

[0297] By adopting the above technical solution, the insulating connection member 113 can better cover the outer peripheral side of the stator 112 , thereby more effectively insulating and separating the outer peripheral side of the stator 112 from the housing 111 .

[0298] In some embodiments of this application, please refer to Fig.16 The insulating connecting member 113 is an integrally formed member. For example, the insulating connecting member 113 can be integrally formed by an injection molding process.

[0299] The insulating connection member 113 may connect the stator 112 and the housing 111 along the axial direction of the motor 110 , or may connect the stator 112 and the housing 111 along the radial direction of the motor 110 .

[0300] In some embodiments, the insulating connection member 113 is a fastener made of an insulating material, such as a bolt, a fixing pin, a rivet, etc., and the stator 112 and the housing 111 are connected by the fastener.

[0301] Of course, in other embodiments, the insulating connecting member 113 may also be other connecting components made of insulating materials, such as adhesives.

[0302] By adopting the above technical solution, the insulating connecting component 113 can be integrally connected between the stator 112 and the housing 111, which not only realizes the mutual connection between the stator 112 and the housing 111, but also effectively insulates and separates the stator 112 and the housing 111, thereby effectively simplifying the assembly process of the motor 110 and improving the assembly efficiency.

[0303] In some embodiments of this application, please refer to Fig.16 The insulating connecting member 113 connects the stator 112 and the housing 111 along the axial direction of the motor 110 .

[0304] By adopting the above technical solution, the relative positions of the stator 112 and the housing 111 along the axial direction of the motor 110 are effectively limited, so that the stator 112 and the housing 111 can be relatively fixed along the axial direction of the motor 110 .

[0305] In some embodiments of this application, please refer to Figures 4 to 16 The motor 110 further includes a conductive member 116 , which is electrically connected between the rotating shaft 1142 and the housing 111 .

[0306] The conductive member 116 is a component for conducting the circuit between the rotating shaft 1142 and the housing 111. It can be understood that the resistance of the conductive member 116 is much smaller than the resistance of the bearing 115. When the conductive member 116 is electrically connected between the rotating shaft 1142 and the housing 111, the bearing 115 is short-circuited, so that the current directly flows through the conductive member 116 from the rotating shaft 1142 to the housing 111 without flowing through the bearing 115. The conductive member 116 can be, but is not limited to, a conductive carbon rod, a conductive ring, a conductive bearing 115, etc.

[0307] By adopting the above technical solution, the induced current generated by the magnetic coupling between the rotor 114 and the stator 112 can be directly transmitted to the housing 111 through the conductive member 116 without flowing through the bearing 115, thereby further reducing the risk of electrical corrosion of the bearing 115 and further improving the performance of the motor 110.

[0308] In some embodiments of this application, please refer to Figure 2 The motor 110 further includes a grounding wire 117 and a first common-mode current filter 118 . The grounding wire 117 is electrically connected to the housing 111 , and the first common-mode current filter 118 is disposed on the grounding wire 117 .

[0309] The grounding wire 117 is a component for electrically connecting the housing 111 to the ground. The first common mode current filter 118 is an electronic component for suppressing the common mode current on the grounding wire 117. In some embodiments, the first common mode current filter 118 is a ring structure, and the first common mode current filter 118 is sleeved on the grounding wire 117.

[0310] In the related art, the common mode current on the stator 112 is easily transmitted to the bearing 115 through the housing 111 and the rotating shaft 1142 of the rotor 114, and then output to the ground through the ground wire 117. By adopting the above technical solution, the common mode current on the ground wire 117 can be effectively suppressed, and then the common mode current on the entire common mode current transmission path is reduced, thereby further reducing the risk of electrical corrosion of the bearing 115 and further improving the performance of the motor 110.

[0311] Second, see Figure 1 An embodiment of the present application provides an electric drive device 100 , including a controller 120 and the motor 110 described in any one of the above embodiments, and the controller 120 is electrically connected to the motor 110 .

[0312] The electric drive device 100 provided in the embodiment of the present application adopts the motor 110 described in any of the above embodiments, thereby effectively improving the working performance of the electric drive device 100.

[0313] In some embodiments of this application, please refer to Figure 2 The electric drive device 100 further includes a second common mode current filter 150 . The controller 120 is electrically connected to the motor 110 via an AC wiring harness 140 . The second common mode current filter 150 is disposed on the AC wiring harness 140 .

[0314] The second common mode current filter 150 is an electronic component for suppressing the common mode current on the AC harness 140. In some embodiments, the second common mode current filter 150 is a ring-shaped structure, and the second common mode current filter 150 is sleeved on the AC harness 140.

[0315] In some embodiments, the controller 120 includes an inverter module, and the battery 200 transmits DC current to the inverter module through the DC harness 130. The inverter converts the DC current provided by the battery 200 into AC current and transmits it to the stator 112 of the motor 110 through the AC harness 140.

[0316] In the related technology, the above-mentioned AC current usually includes common-mode current and differential-mode current. The differential-mode current is the main driving current of the stator 112, and the common-mode current is the interference current of the stator 112. The common-mode current on the stator 112 is easily transmitted to the bearing 115 through the housing 111 and the rotating shaft 1142 of the rotor 114, and then output to the ground through the ground wire 117.

[0317] By adopting the above technical solution, the common-mode current transmitted by the controller 120 to the stator 112 of the motor 110 can be effectively suppressed, thereby reducing the common-mode current on the entire common-mode current transmission path, thereby further reducing the risk of electrical corrosion of the bearing 115 and further improving the performance of the motor 110.

[0318] Third, see Figure 1 An embodiment of the present application provides a chassis, including a battery 200 and the electric drive device 100 described in any one of the above embodiments, and the battery 200 is electrically connected to the controller 120.

[0319] The chassis provided in the embodiment of the present application effectively improves the working performance of the chassis because it adopts the electric drive device 100 described in any of the above embodiments.

[0320] Fourth, please refer to Figure 1 An embodiment of the present application further provides an electric device, comprising the electric drive device 100 or the above-mentioned chassis described in any one of the above-mentioned embodiments.

[0321] The electric device provided in the embodiment of the present application effectively improves the working performance of the electric device because it adopts the electric drive device 100 or the above-mentioned chassis described in any of the above-mentioned embodiments.

[0322] The above description is only a preferred embodiment of the present application and is 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: The motor comprises: A housing having a cavity; A stator is accommodated in the cavity; The insulating connecting component is used to connect the stator and the shell so that the stator and the shell are relatively fixed and insulated from each other.

2. The motor according to claim 1, characterized in that: The insulating connecting component includes a first insulating member and a connecting member, wherein the connecting member is used to connect the stator and the housing, and at least a portion of the first insulating member is arranged between at least one of the stator and the housing and the connecting member to insulate at least one of the stator and the housing from the connecting member.

3. The motor according to claim 2, characterized in that: The connecting member includes a first connecting portion and a second connecting portion connected to each other, the first connecting portion is used to connect the stator, the second connecting portion is used to connect the housing, and at least a portion of the first insulating member is arranged between the first connecting portion and the stator to insulate the stator and the first connecting portion from each other.

4. The motor according to claim 3, characterized in that: The stator is provided with a first connecting hole, the first connecting portion includes a first connecting rod, the second connecting portion is connected to one end of the first connecting rod, the first connecting rod is inserted into the first connecting hole, and the first insulating member includes a first insulating portion, which is arranged between the first connecting rod and the hole wall of the first connecting hole.

5. The motor according to claim 4, characterized in that: The first insulating portion is interference-fitted between the first connecting rod and a hole wall of the first connecting hole.

6. The motor according to claim 4 or 5, characterized in that: The first insulating portion is in a cylindrical structure and is sleeved on the first connecting rod.

7. The motor according to any one of claims 4 to 6, characterized in that: The first connecting hole is a through hole, the first connecting rod is passed through the first connecting hole, the first connecting portion further comprises a first pressing head connected to an end of the first connecting rod away from the second connecting portion, the first pressing head is located outside the first connecting hole and cooperates with the housing to clamp the stator.

8. The motor according to claim 7, characterized in that: The first insulating member further includes a second insulating portion and a third insulating portion, wherein the second insulating portion is sandwiched between the stator and the first pressure head, and the third insulating portion is arranged at an end of the first insulating portion away from the first pressure head and sandwiched between the stator and the housing.

9. The motor according to any one of claims 3 to 8, characterized in that: The second connection portion is threadedly connected to the housing.

10. The motor according to claim 3, characterized in that: The stator is provided with a first embedded hole, the first insulating member includes a fourth insulating portion, the fourth insulating portion is fixed in the first embedded hole, and the first connecting portion is connected to the fourth insulating portion.

11. The motor according to claim 10, characterized in that: The housing is provided with a second connecting hole, the second connecting portion comprises a second connecting rod, the first connecting portion is connected to one end of the second connecting rod, and the second connecting rod is inserted into the second connecting hole.

12. The motor according to claim 11, characterized in that: The second connecting rod is interference fit with the hole wall of the second connecting hole.

13. The motor according to claim 11 or 12, characterized in that: The second connecting hole is a through hole, the second connecting rod is inserted into the second connecting hole, the second connecting portion further comprises a second pressing head connected to an end of the second connecting rod away from the first connecting portion, the second pressing head is located outside the second connecting hole and cooperates with the stator to clamp at least a portion of the housing.

14. The motor according to claim 13, characterized in that: The first insulating member further includes a fifth insulating portion, which is disposed at an open end of the first embedded hole and is sandwiched between the stator and the housing.

15. The electric machine according to any one of claims 10 to 14, characterized in that: The first connecting portion is threadably connected to the fourth insulating portion.

16. The electric machine according to any one of claims 10 to 15, characterized in that: The fourth insulating portion covers an end surface of the first connecting portion facing away from the second connecting portion and an outer peripheral wall of the first connecting portion.

17. The motor according to claim 2, characterized in that: The connecting member includes a first connecting portion and a second connecting portion connected to each other, the first connecting portion is used to connect the stator, the second connecting portion is used to connect the shell, and at least a portion of the first insulating member is arranged between the second connecting portion and the shell to insulate the shell and the second connecting portion from each other.

18. The motor according to claim 17, characterized in that: A second connecting hole is provided on the shell, the second connecting part includes a second connecting rod, the first connecting part is connected to one end of the second connecting rod, the second connecting rod is inserted into the second connecting hole, and the first insulating member includes a sixth insulating part, and the sixth insulating part is arranged between the second connecting rod and the hole wall of the second connecting hole.

19. The motor according to claim 18, characterized in that: The sixth insulating portion is interference-fitted between the second connecting rod and a hole wall of the second connecting hole.

20. The motor according to claim 18 or 19, characterized in that: The sixth insulating portion is in a cylindrical structure and is sleeved on the second connecting rod.

21. The electric machine according to any one of claims 18 to 20, characterized in that: The second connecting hole is a through hole, the second connecting rod is inserted into the second connecting hole, the second connecting portion further comprises a second pressing head connected to an end of the second connecting rod away from the first connecting portion, the second pressing head is located outside the second connecting hole and cooperates with the stator to clamp at least a portion of the housing.

22. The motor according to claim 21, characterized in that: The first insulating member further includes a seventh insulating portion and an eighth insulating portion, the seventh insulating portion being sandwiched between the housing and the second pressure head, and the eighth insulating portion being arranged at an end of the sixth insulating portion away from the second pressure head and sandwiched between the stator and the housing.

23. The electric machine according to any one of claims 17 to 22, characterized in that: The first connection portion is threadedly connected to the stator.

24. The motor according to claim 17, characterized in that: The housing is provided with a second embedded hole, the first insulating member comprises a ninth insulating portion, the ninth insulating portion is fixed in the second embedded hole, and the second connecting portion is connected to the ninth insulating portion.

25. The motor according to claim 24, characterized in that: The stator is provided with a first connecting hole, the first connecting portion includes a first connecting rod, the second connecting portion is connected to one end of the first connecting rod, and the first connecting rod is inserted into the first connecting hole.

26. The motor according to claim 25, characterized in that: The first connecting rod is interference fit with the hole wall of the first connecting hole.

27. The electric machine according to claim 25 or 26, characterized in that: The first connecting hole is a through hole, the first connecting rod is passed through the first connecting hole, the first connecting portion further comprises a first pressing head connected to an end of the first connecting rod away from the second connecting portion, the first pressing head is located outside the first connecting hole and cooperates with the housing to clamp the stator.

28. The motor according to claim 27, characterized in that: The first insulating member further includes a tenth insulating portion, which is disposed at an opening end of the second embedded hole and sandwiched between the stator and the housing.

29. The electric machine according to any one of claims 24 to 28, characterized in that: The second connecting portion is threadably connected to the ninth insulating portion.

30. The electric machine according to any one of claims 24 to 29, characterized in that: The ninth insulating portion covers an end surface of the second connecting portion facing away from the first connecting portion and an outer peripheral wall of the second connecting portion.

31. The electric machine according to any one of claims 1 to 30, characterized in that: The housing may include a shell and a connection seat, the shell having the cavity, the connection seat being disposed in the cavity and connected to a cavity wall of the cavity, and the insulating connection member being connected between the connection seat and the stator.

32. The electric machine according to any one of claims 2 to 30, characterized in that: The connecting member connects the stator and the housing along the axial direction of the motor.

33. The electric machine according to any one of claims 2 to 32, characterized in that: The insulating connection member further includes a second insulating member which is interference-fitted between the outer peripheral side of the stator and the housing.

34. The motor according to claim 33, characterized in that: The second insulating member is in a cylindrical structure and is sleeved on the outer circumference of the stator.

35. The motor according to claim 1, characterized in that: The insulating connection member is interference-fitted between the outer peripheral side of the stator and the housing.

36. The motor according to claim 35, characterized in that: The insulating connecting component is in a cylindrical structure and is sleeved on the outer peripheral side of the stator.

37. The motor according to claim 1, characterized in that: The insulating connecting component is an integrally formed component.

38. The motor according to claim 37, characterized in that: The insulating connection member connects the stator and the housing along an axial direction of the motor.

39. The electric machine according to any one of claims 1 to 38, characterized in that: The motor also includes a rotor, a bearing and a conductive member. The rotor includes a rotor body magnetically coupled to the stator and a rotating shaft coaxially connected to the rotor body. The bearing is mounted on the housing and sleeved on the rotating shaft. The conductive member is electrically connected between the rotating shaft and the housing.

40. The electric machine according to any one of claims 1 to 39, characterized in that: The motor further includes a grounding wire and a first common-mode current filter. The grounding wire is electrically connected to the housing, and the first common-mode current filter is arranged on the grounding wire.

41. An electric drive device, characterized in that: The electric drive device comprises a controller and a motor as described in any one of claims 1 to 40, wherein the controller is electrically connected to the motor.

42. The electric drive device according to claim 41, characterized in that: The electric drive device further includes a second common-mode current filter. The controller is electrically connected to the motor via an AC wiring harness, and the second common-mode current filter is disposed on the AC wiring harness.

43. A chassis, characterized in that: The chassis includes a battery and an electric drive device as described in claim 41 or 42, and the battery is electrically connected to the controller.

44. An electric device, characterized in that: The electric device comprises the electric drive device according to claim 41 or 42 or the chassis according to claim 43.

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