Motor and sealing structure thereof

Abstract

The utility model provides a motor and a sealing structure thereof. The motor comprises a sealing structure for a three-phase high-voltage wiring harness. The sealing structure comprises a second part of an end cover of the motor, wherein the second part is configured to limit a high-voltage chamber for accommodating the three-phase high-voltage wiring harness; the insulating seat assembly comprises an insulating seat main body and a conductive piece embedded into the insulating seat main body, and the insulating seat main body is configured to be fixedly mounted on the second part, so that one part of the insulating seat main body and one part of the conductive piece extend into and are accommodated in the high-voltage chamber; the conductive piece is configured to be electrically connected with the three-phase high-voltage wire harness; and the sealing ring is configured to be clamped between the second part and the insulating seat assembly. According to the motor and the sealing structure thereof, a high-pressure chamber isolation scheme which is more convenient, effective and high in cost performance is provided, the production cycle and the manufacturing cost of motor products are greatly shortened, and the quality of the motor products is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of electric vehicles, more particularly to a motor for electric vehicles and a sealing structure thereof for three-phase high-voltage wiring harness. BACKGROUND

[0002] Currently, the drive motor technology of electric vehicles mainly develops towards high torque density and high power density, thus requiring efficient heat dissipation and cooling capacity. In this regard, oil-cooled motors have a good development prospect, because oil itself has good heat conductivity, and also has the characteristics of non-magnetic, non-flammable and non-conductive. In recent years, some research institutions and enterprises at home and abroad have vigorously developed oil-cooled motors.

[0003] The existing oil-cooled motor relies on the insulation properties of the cooling oil in the motor cavity and the insulation properties of the oil film formed to achieve insulation, thus neglecting the insulation protection of the high-voltage cavity for accommodating the high-voltage wiring harness, resulting in that the high-voltage wiring harness of the motor is located in the cavity of the motor. This can cause the following risks: 1) during the assembly of the motor, the humidity in the environment is relatively high, which leads to excessive humidity in the motor cavity after the motor is assembled; the motor will undergo high and low temperature cycles during operation, which will cause the internal humidity to condense into water, thereby affecting the insulation; 2) during the long-term operation of the motor, oil mist may be generated due to temperature rise, which will adhere to the surface of the three-phase high-voltage wiring harness, and over time will cause corrosion of the three-phase high-voltage wiring harness, thereby causing the motor to fail.

[0004] To avoid the above problems, the existing oil-cooled motor adopts a sealing design. The sealing design uses a dispensing scheme to install an insulating seat. Because the dispensing process needs to be matched with the dispensing equipment on the production line, the compressibility of the glue is difficult to control, and the compatibility of the glue also needs to be evaluated, so this scheme is time-consuming and labor-intensive, and the cost of the glue is too high.

[0005] Therefore, there is a need in the art for a new sealing structure for a three-phase high-voltage wiring harness of a motor, which can solve at least some of the above technical problems. SUMMARY

[0006] The utility model provides a motor and a sealing structure thereof for a three-phase high-voltage wiring harness. The sealing structure provides a more convenient, effective and cost-effective high-voltage chamber isolation scheme, greatly shortening the production cycle and manufacturing cost of the motor product, and improving the quality of the motor product. The three-phase connection formed by the sealing structure has many advantages such as good insulation, high integration, high reliability, small space occupation, etc.

[0007] In a first aspect, the utility model provides a kind of motor, the motor includes: shell, it includes open end portion;Stator portion and rotor portion are installed in the shell;And end cover, the end cover is used to close the open end portion of the shell, wherein the motor includes the sealing structure for three-phase high voltage harness, the sealing structure includes: the second portion of the end cover of the motor, the second portion is configured to define high pressure chamber for accommodating the three-phase high voltage harness;Insulating seat component, the insulating seat component includes: insulating seat body;And conductive piece embedded in the insulating seat body, wherein the insulating seat body is configured to be fixedly installed on the second portion, so that part of the insulating seat body and part of the conductive piece extend into and be contained in the high pressure chamber, the conductive piece is configured to be electrically connected with the three-phase high voltage harness, and sealing ring, the sealing ring is configured to be clamped between the second portion and the insulating seat component.

[0008] The above-mentioned sealing structure completely separates the high pressure chamber accommodating the three-phase high voltage harness from the motor chamber, avoids the direct exposure of the three-phase high voltage harness to the oil mist environment, reduces the problem of motor insulation failure, and also prevents the motor oil mist from entering the motor controller in a high temperature environment, thereby reducing the risk of electrical element failure of the motor controller. In addition, the high pressure chamber of the sealing structure is integrated in the end cover of the motor, realizing the compact layout of the motor and the motor controller.

[0009] In one embodiment, the end cover includes an end cover body including a first portion and the second portion integrally formed, wherein the first portion includes: a plate portion configured to close the open end portion of the shell;And a protruding frame portion extending from the plate portion, wherein the second portion extends from the protruding frame portion perpendicular to the plane where the first portion is located.

[0010] In one embodiment, the second portion is a shell-shaped member in the shape of a cuboid, has a first opening with a flange on the side close to the protruding frame portion, and the insulating seat body is configured to be fixedly installed on the flange.

[0011] In one embodiment, the second portion has a second opening on the side opposite to the first opening, and the second opening is used for the three-phase high voltage harness to pass through.

[0012] In one embodiment, the insulating seat body and the conductive piece are injection molded together, and wherein insulating glue is applied at the interface between the insulating seat body and the conductive piece.

[0013] In one embodiment, the insulating base body comprises: an end plate having an inner side and an outer side opposite to the inner side; and a conductive member support plate extending perpendicularly to the end plate at the inner side of the end plate, wherein the end plate is configured to be fixedly mounted onto the second portion such that the conductive member support plate extends into and is accommodated within the high-voltage chamber.

[0014] In one embodiment, the second portion of the end plate or the end cover is provided with a sealing groove, and the sealing ring is configured to be mounted within the sealing groove so as to be clamped between the end plate and the second portion.

[0015] In one embodiment, the end plate has honeycomb-shaped partition ribs extending perpendicularly at the outer side.

[0016] In one embodiment, the conductive member comprises a copper bar, which is a three-long-stripe conductor made of copper material, each long-stripe conductor being bent into an "L" shape, wherein the long side of the "L" shape is fixed on the conductive member support plate, and the short side extends out of the opening of the end plate and is bent to be parallel to the end plate.

[0017] In a second aspect of the present application, a sealing structure is provided, which is used for a three-phase high-voltage wiring harness of an electric motor, and comprises: a second portion of an end cover of the electric motor, the second portion being configured to define a high-voltage chamber for accommodating the three-phase high-voltage wiring harness; an insulating base assembly, which comprises: an insulating base body; and a conductive member embedded in the insulating base body, wherein the insulating base body is configured to be fixedly mounted onto the second portion such that a portion of the insulating base body and a portion of the conductive member extend into and are accommodated within the high-voltage chamber, the conductive member is configured to be electrically connected with the three-phase high-voltage wiring harness; and a sealing ring, which is configured to be clamped between the second portion and the insulating base assembly.

[0018] Generally, the various embodiments of the present application can be combined and coupled in any way possible in the scope of the present application. These and other aspects, features and / or advantages of the present application will become apparent to those skilled in the art from the following description, which is to be read in connection with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0019] Embodiments of the present application will be described by way of example only with reference to the following drawings, in which:

[0020] Figure 1 is a partial cross-sectional view of a main drive motor of an electric vehicle, the drive motor having a sealing structure according to the present application;

[0021] Figure 2 is an exploded perspective view of a sealing structure according to one embodiment of the present application;

[0022] Figure 3 is Figure 2 another perspective view of the sealing structure shown in

[0023] Figure 4 is a perspective view of an insulation seat assembly of the sealing structure according to another embodiment of the present application;

[0024] Figure 5 is Figure 4 another perspective view of the insulation seat assembly shown in; and

[0025] Figure 6 is Figure 4 still another perspective view of the insulation seat assembly shown in.

[0026] It should be understood that the drawings only show some specific ways to implement the present application and should not be understood as limiting other possible embodiments falling within the scope of the appended claims. The scope of protection of the present application is only defined by the appended claims. DETAILED DESCRIPTION

[0027] Those skilled in the art will appreciate that the specific structure of an electric vehicle drive system varies according to different types and designs, but generally includes a motor controller, a motor, and a transmission. The direct current from the power battery is transmitted to the motor controller via a cable, the motor controller converts the direct current into alternating current, and then transmits the converted alternating current to the motor through a three-phase high-voltage harness. After receiving the alternating current, the rotor of the motor rotates in the formed electromagnetic field, thereby driving the output shaft of the motor to rotate. The rotating shaft of the motor is connected to the transmission, which is responsible for adjusting the torque and speed of the motor output to adapt to different driving conditions. Then, the output shaft of the transmission transmits power to the wheels, so that the vehicle obtains driving power.

[0028] For the above motor and its three-phase high-voltage harness, the present application proposes a sealing structure that completely isolates the high-voltage chamber containing the three-phase high-voltage harness from the motor chamber, avoiding direct exposure of the three-phase high-voltage harness to the oil mist environment, reducing the problem of motor insulation failure, and also preventing motor oil mist from entering the motor controller in a high-temperature environment, reducing the risk of failure of electrical components of the motor controller. The above sealing structure will be described below with reference to Figures 1-6

[0029] First refer to Figure 1 , which is a partial sectional view of a main drive motor of an electric vehicle. As Figure 1 ​As shown, the electric motor can include a housing 1, a stator portion 2, a rotor portion 3 and an end cover 4. The housing 1 is a generally cylindrical shell-shaped member for accommodating the stator portion 2, the rotor portion 3 and other components. The housing 1 includes an open end via which the stator portion 2 and the rotor portion 3 are installed in the housing 1. The stator portion 2 generally includes a stator core formed by stacking cold-rolled sheets and a three-phase winding formed by connecting a plurality of coils. The stator portion 2 is fixedly installed on the housing 1 along the inner wall surface of the housing 1. The rotor portion 3 is rotatably inserted in the center of the stator portion 2 for rotation in the electromagnetic field formed by the stator portion 2, thereby driving the output shaft (not shown) of the electric motor to rotate. The end cover 4 is used to close the open end of the housing 1. The end cover 4 is further used to fix the stator portion 2 and the rotor portion 3 of the electric motor, ensuring the mechanical stability of the electric motor and preventing displacement or damage during operation. In addition, the end cover 4 is also used to seal the inside of the electric motor, preventing dust, moisture and other contaminants from entering the inside of the electric motor, and protecting the components inside the electric motor from the external environment.

[0030] In Figure 1 In the arrangement shown, the left side of the electric motor is connected to the transmission (as shown by arrow A), specifically the output shaft of the electric motor is connected to the input shaft of the transmission. In addition, the upper left side of the electric motor is connected to the motor controller (as shown by arrow B), specifically the upper left portion of the end cover 4 of the electric motor forms a high-voltage chamber for accommodating a three-phase high-voltage harness, and the three-phase high-voltage harness accommodated in the high-voltage chamber is connected to the left of the motor controller. The structure of the electric motor end cover 4 will be described in further detail below in conjunction with the description of the sealing structure according to the present application.

[0031] The sealing structure according to the present application includes a portion (second portion 412 described below) of the end cover 4 of the electric motor, an insulating seat assembly 10, a sealing ring 20 and a fastener 30.

[0032] In conjunction with reference Figure 2 and Figure 3 , the end cover 4 of the electric motor includes an end cover body 41, a first cover plate 42 (as shown in Figure 1 ) and a second cover plate (not shown). Among them, the end cover body 41 includes a first portion 411 and a second portion 412 integrally formed.

[0033] The first portion 411 includes a plate portion 411a and a protruding frame portion 411b extending upwardly from the plate portion 411a. The plate portion 411a and the protruding frame portion 411b are substantially in the same plane. The plate portion 411a is a substantially circular plate member and is configured to close the open end of the casing 1. The protruding frame portion 411b is a substantially rectangular bezel member with a center opening to facilitate mounting of various components inside the motor via the opening, which is then closed by the aforementioned second cover plate on the right side. The protruding frame portion 411b can thus be provided with fastening features such as threaded holes on its outer side. The second cover plate can also be provided with corresponding fastening features such as threaded holes. Fasteners such as screws can be installed through the fastening features on the second cover plate to the fastening features on the protruding frame portion 411b, thereby securing the second cover plate to the first portion 411 to close the aforementioned opening.

[0034] The second portion 412 extends leftwardly from the protruding frame portion 411b substantially perpendicularly to the plane in which the first portion 411 lies. The second portion 412 is a substantially cuboid shell member and is configured to define a high voltage chamber for accommodating the three-phase high voltage harness. The second portion 412 has a first opening 412a on the side proximal to the protruding frame portion 411b, which first opening 412a has a flange with a sealing groove for mounting the aforementioned sealing ring 20, which will be described in detail below. The second portion 412 has a second opening 412b on the side opposite to the first opening 412a, which second opening 412b can be formed as three spaced apart circular openings, each for passing one of the three-phase high voltage harness. Further, each circular opening can be provided with an annular flange 412d for isolating the three-phase high voltage harness from each other to avoid electromagnetic interference and the like. Further, the second portion 412 has a third opening 412c on the upper side. The third opening 412c is provided for facilitating entry of tools and human hands and the like into the interior of the second portion 412 to facilitate the step of electrically connecting the three-phase high voltage harness to the conductive member and the like. After installation is completed, the third opening 412c is closed by the aforementioned first cover plate 42. The third opening 412c can thus also have a flange with fastening features such as threaded holes thereon. The first cover plate 42 can also be provided with corresponding fastening features such as threaded holes. Fasteners such as screws can be installed through the fastening features on the first cover plate 42 to the fastening features on the flange, thereby securing the first cover plate 42 to the second portion 412 to close the third opening 412.

[0035] When the end cover 4 is mounted to the motor housing 1, the plate portion 411a closes off most of the open end of the motor housing 1, the protruding frame portion 411b is located above the plate portion 411a, and the second portion 412 extends above the motor housing 1 parallel to the longitudinal axis of the motor housing 1. Three high voltage wires of a three-phase high voltage wiring harness (not shown) connecting a motor controller can each enter the high voltage chamber defined by the second portion 412 from one of the three second openings 412b and subsequently electrically connect to a conductive member (to be described in detail below) on the insulating hub assembly 10, the other end of which will then be electrically connected to the three-phase high voltage supply input of the motor by suitable means. In the above arrangement, it is possible to allow the motor controller to be integrated above the motor, thereby achieving a compact layout between the motor controller and the motor. It will be appreciated that the end cover 4 is not limited to the specific embodiment given above, but can have any other suitable configuration so long as it includes a first portion 411 for closing off the open end of the motor housing 1 and a second portion 412 for defining a high voltage chamber for housing a three-phase high voltage wiring harness. Furthermore, the sealing arrangement according to the present application can relate only to the second portion 412 described above.

[0036] The insulating hub assembly 10 described above includes an insulating hub body 11 made of an insulating material and a conductive member 12 embedded in the insulating hub body 11. The insulating hub body 11 includes an end plate 111 and a conductive member support plate 112.

[0037] The end plate 111 is a plate-like structure and has an inner side and an outer side opposite thereto. The end plate 111 is shaped to generally correspond to the first opening 412a of the second portion 412 described above and is configured to sealingly fit over the flange of the first opening 412a. Accordingly, the end plate 111 can be provided with fastening features (such as threaded holes) at its edges and the flange of the first opening 412a can also be provided with corresponding fastening features (such as threaded holes), a fastener 30 can be installed through the fastening features on the end plate 111 to the fastening features on the flange to fixedly mount the end plate 111 to the flange. It will be appreciated that the fastener 30 can be in any suitable form, including but not limited to a bolt, a screw, a rivet, a pin, a weld, etc.

[0038] As mentioned above, the flange is also provided with a sealing groove for accommodating a sealing ring 20, when the end plate 111 is fixedly installed onto the flange, the sealing ring 20 is clamped between the end plate 111 and the flange, and is deformed in an appropriate amount, so as to form a sealed contact between the contact surface of the end plate 111 and the flange. In this way, the high-voltage chamber formed by the second part 412 is airtightly separated from the motor chamber, and the oil mist from the motor chamber will not be able to enter the high-voltage chamber through the above-mentioned gap. The sealing ring 20 can be made of any suitable material, including but not limited to silicone rubber, polytetrafluoroethylene, butyl rubber, nylon, epoxy resin, etc. It will be understood that the above-mentioned sealing groove can also be provided on the end plate 111, and the sealing ring 20 is accommodated in the sealing groove. In this way, the sealing ring 20 can also be stably clamped between the contact surface of the end plate 111 and the flange.

[0039] The conductive piece support plate 112 is also a plate-shaped member, which extends perpendicularly to the end plate 111 on the inner side of the end plate 111, and is configured to fix and support the conductive piece 12, so that only the connecting ends of the conductive piece 12 are exposed. During installation, as the above-mentioned end plate 111 is fixedly installed onto the second part 412, the conductive piece support plate 112 together with a part of the conductive piece 12 extends into and is accommodated in the high-voltage chamber defined by the second part 412, and then the two connecting ends of the conductive piece 12 are respectively electrically connected with the three-phase high-voltage wire harness and the three-phase high-voltage power input end of the motor.

[0040] In one embodiment, the conductive member 12 can be injection molded together with the insulating base body 11. Alternatively, the conductive member 12 can comprise a copper bar. In this way, a gapless contact between the copper bar and the insulating base body 11 can be substantially achieved. Further, the interface between the insulating base body 11 and the conductive member 12 can be coated with an insulating glue, such as epoxy resin, etc. Coating the interface with glue can improve the adhesion between the insulating base body 11 and the conductive member 12, ensuring that the two are tightly combined and preventing them from separating due to vibration or thermal expansion, etc. The gap between the insulating base body 11 and the copper bar is filled, further improving the sealing. As shown, the above-mentioned copper bar can be three long strip-shaped conductors made of copper material, which are bent into an "L" shape, with the long side of the "L" shape fixed on the conductive member support plate 112 and the short side extending out of the opening of the end plate 111 and bent to be parallel to the end plate 111. Those skilled in the art will understand that electrical insulation is required between the conductive members (e.g. the three copper conductors). Therefore, the conductive member support plate 112 comprises at least one shielding member 112a formed on the side of the long side of the conductive member 12 and configured to separate the conductive member 12 from other conductive members 12 or the end cover 4 for electrical insulation, thereby effectively preventing the conductive member 12 from short-circuiting during use and improving the safety of use. In addition, the shielding member 112a can effectively block external signal interference and reduce the emission of electromagnetic energy to avoid interfering with the use of other electrical components. Figure 2 and Figure 3 In the embodiments shown in

[0041] In addition, the end plate 111 can also comprise at least one shielding member 111a formed on the outer side thereof, which is formed on the side of the short side of the conductive member 12 and is configured to separate the conductive members 12 from each other. The shielding member 111a functions similarly to the shielding member 112a and will not be described here again. In the embodiments shown in Figure 2 and Figure 3 In the embodiments shown in

[0042] As shown in Figures 2-3 Both connection holes of the conductive member 12 are provided. The connection hole on the side of the conductive member support plate 112 is electrically connected to the three-phase high-voltage wire harness through a bolt, and the connection hole on the side of the end plate 111 is electrically connected to the soft copper wire 50 (as shown in Figure 1The soft copper wire 50 is further connected to the three-phase high-voltage power input of the motor through the bolt connection. Those skilled in the art will understand that in this bolt connection mode, the corresponding structure and appropriate torque can also be designed to ensure the reliability of the connection. Those skilled in the art will also understand that the utility model is not limited to the connection mode between the conductive part 12 and the three-phase high-voltage wire harness and the three-phase high-voltage power input of the motor, and the electrical connection between them can also be achieved by any other suitable electrical connection mode, such as welding connection.

[0043] Figures 4-6 The insulation seat assembly 10' according to another embodiment of the utility model is illustrated. As Figures 4-6 shown, the insulation seat assembly 10' includes an insulation seat body 11' made of insulating material and a conductive part 12' embedded in the insulation seat body 11'. The insulation seat body 11' includes an end plate 111' and a conductive part support plate 112'. Since the insulation seat assembly 10' is basically similar to the above-mentioned insulation seat assembly 10, the description of the same features will be omitted below, and only the different features will be described in detail.

[0044] Firstly, the end plate 111' of the insulation seat body 11' has a honeycomb shape on the outer side (i.e. the side opposite to the conductive part support plate 112'). In one specific embodiment, the end plate 111' has vertically extending honeycomb-shaped ribs on the outer side. On the one hand, this can increase the structural strength of the end plate 111', and on the other hand, it can also ensure the flatness of the end plate 111' when the product is ejected from the mold, ensuring the air tightness during assembly. Those skilled in the art will understand that the insulation seat body 11' made of insulating material will produce a large deformation after being ejected from the mold due to temperature changes. The honeycomb shape of the end plate 111' can provide a deformation allowance, effectively absorbing the deformation, so that the side surface of the end plate 111' used to cooperate with the second part 412 of the end cover 4 maintains excellent flatness, thereby ensuring the air tightness during assembly.

[0045] In addition, a plurality of recesses are provided in the shielding part 112a' of the conductive part support plate 112', and the plurality of recesses are separated by rib plates. This can reduce the weight of the insulation seat body 11' while ensuring the mechanical strength, and at the same time increase the electrical gap between the conductive parts 12', ensuring the safety of discharge.

[0046] Further, as Figure 6 shown, the back surface of the conductive part support plate 112' is provided with a plurality of reinforcing ribs 112b', which are configured to enhance the mechanical strength of the insulation seat body 11'.

[0047] Although the present application has been described in connection with the embodiments described above, it should be understood that the application should not be restricted to the described examples. The scope of the application is defined by the appended claims. In the context of the claims, the term "comprising" or "including" does not exclude the presence of elements or steps other than those listed in the claims. Furthermore, the word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The usage of the words "first", "second" and "third" and possibly others does not limit the scope of the application, unless explicitly stated otherwise. The description herein of any particular aspects in relation to different claims is not meant to exclude those aspects from other claims. Furthermore, the features of the different claims can also be combined with each other, and the combination of features is possible even if the combination is not explicitly stated in the claims. Finally, the terms "first", "second", "third", "fourth" etc. are used in the description and in the claims only to distinguish between different features, and are not intended to delimit the scope of the application in any way. Furthermore, the orientation terms "upper", "lower", "left", "right", "inner", "outer" etc. are defined with respect to the orientation of the components shown in the drawings, and it is understood that these orientation terms are relative concepts which can change according to the orientation of the components shown in the drawings.

Claims

1. An electric machine comprising: a casing (1) comprising an open end; a stator portion (2) and a rotor portion (3) mounted within the casing (1); and an end cover (4) for closing the open end of the casing (1), characterized in that the electric machine comprises a sealing structure for a three-phase high-voltage harness, the sealing structure comprising: a second portion (412) of the end cover (4) of the electric machine, the second portion (412) being configured to define a high-voltage chamber for accommodating the three-phase high-voltage harness; an insulating base assembly (10, 10') comprising: an insulating base body (11, 11'); and an electrically conductive piece (12, 12') embedded in the insulating base body (11, 11'), wherein the insulating base body (11, 11') is configured to be fixedly mounted to the second portion (412) such that a portion of the insulating base body (11, 11') and a portion of the electrically conductive piece (12, 12') protrude into and are accommodated within the high-voltage chamber, the electrically conductive piece (12, 12') is configured to be electrically connected with the three-phase high-voltage harness, and a sealing ring (20) configured to be clamped between the second portion (412) and the insulating base assembly (10, 10').

2. The electric machine of claim 1, wherein, the end cover (4) comprises an end cover body (41) comprising a first portion (411) and the second portion (412) being integrally formed, wherein the first portion (411) comprises: a plate portion (411a) configured to close the open end of the casing (1); and a protruding frame portion (411b) extending from the plate portion (411a), wherein the second portion (412) extends from the protruding frame portion (411b) perpendicular to a plane in which the first portion (411) lies.

3. The electric machine of claim 2, wherein, the second portion (412) is a shell-shaped member in the shape of a cuboid having a first opening (412a) on a side close to the protruding frame portion (411b), the first opening (412a) having a flange to which the insulating base body (11, 11') is configured to be fixedly mounted.

4. The electric machine of claim 3, wherein, the second portion (412) has a second opening (412b) on a side opposite to the first opening (412a) for the three-phase high-voltage harness to pass through.

5. The electric machine of claim 1, wherein, the insulating base body (11, 11') and the electrically conductive piece (12, 12') are injection molded together, and wherein an interface between the insulating base body (11, 11') and the electrically conductive piece (12, 12') is coated with insulating glue.

6. The electric machine of claim 1, wherein, the insulating base body (11, 11') comprises: an end plate (111, 111') having an inner side and an outer side opposite to the inner side; and an electrically conductive piece support plate (112, 112') extending perpendicular to the end plate (111, 111') on the inner side of the end plate (111, 111'), The end plate (111, 111') is configured to be fixedly mounted to the second portion (412) such that the electrically conductive member support plate (112, 112') extends into and is accommodated in the high-voltage chamber.

7. The electric machine of claim 6, wherein, The end plate (111, 111') or the second portion (412) of the end cover (4) is provided with a sealing groove, and the sealing ring (20) is configured to be mounted in the sealing groove so as to be clamped between the end plate (111, 111') and the second portion (412).

8. The electric machine of claim 6, wherein, The end plate has vertically extending honeycomb-shaped partition ribs on the outer side.

9. The electric machine of claim 6, wherein, The electrically conductive member (12, 12') comprises a copper bar, which is a three-long-stripe conductor made of copper material, each long-stripe conductor being bent into an "L" shape, wherein the long side of the "L" shape is fixed on the electrically conductive member support plate (112, 112'), and the short side extends out of the opening of the end plate (111, 111') and is bent to be parallel to the end plate (111, 111').

10. A sealed structure for a three-phase high voltage wiring harness of an electric machine, characterized in that, The sealing structure comprises: The second portion (412) of the end cover (4) of the motor, the second portion (412) being configured to define a high-voltage chamber for accommodating the three-phase high-voltage wire harness; An insulating seat assembly (10, 10'), the insulating seat assembly (10, 10') comprising: An insulating seat body (11, 11'); and An electrically conductive member (12, 12') embedded in the insulating seat body (11, 11'), The insulating seat body (11, 11') is configured to be fixedly mounted to the second portion (412) such that a portion of the insulating seat body (11, 11') and a portion of the electrically conductive member (12, 12') extend into and are accommodated in the high-voltage chamber, the electrically conductive member (12, 12') is configured to be electrically connected with the three-phase high-voltage wire harness, and A sealing ring (20) configured to be clamped between the second portion (412) and the insulating seat assembly (10, 10').

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