Electric drive assembly

Abstract

The present invention provides an electric drive assembly, comprising a disc-type motor. The disc-type motor comprises a housing assembly and a sealing assembly. The housing assembly comprises an outer housing, an inner housing, and a mounting plate connected between the outer housing and the inner housing; a cooling flow channel is defined between the outer housing and the inner housing, and a first inlet and outlet and a second inlet and outlet are formed on the outer housing. The sealing assembly comprises a sealing cover plate; the sealing cover plate is arranged on end faces of the outer housing and the inner housing so as to seal the cooling flow channel in combination with the mounting plate; the surface of the sealing cover plate facing the cooling flow channel is provided with a spigot corresponding to the inner housing; a portion of the inner housing extends into the spigot and is in radial sealing fit with the spigot; and the sealing cover plate is in axial sealing fit with the outer housing. The sealing cover plate is in axial sealing fit with the outer housing and in radial sealing fit with the inner housing, so that during assembly of the sealing cover plate, simply tightening the bolts between the outer housing and the sealing cover plate can ensure the sealing effect, greatly simplifying the mounting process, and reducing the manufacturing cost of the motor housing.

Description

An electric drive assembly Technical Field

[0001] The present invention relates to the technical field of axial magnetic field motors, and in particular to an electric drive assembly. Background Art

[0002] With the continuous development of the electric vehicle field and the increasing actual requirements of customers, the requirements for the electric drive assembly in electric vehicles are becoming higher and higher. Axial magnetic field motors are widely used in them due to their advantages such as small size, high torque density, high power density and high efficiency.

[0003] Axial-size motors, also known as disc motors, consist of a motor housing, stator, and rotor, with the stator and rotor housed within the housing. Motors generate various losses during operation, which in turn causes them to heat up. To improve motor efficiency, a cooling structure is required.

[0004] For example, patent number CN116979718A discloses an invention patent for a stator assembly and an axial magnetic field motor. This patent forms a cooling water channel for cooling the stator between the inner shell and the outer shell of the motor housing. However, since the motor is a disc motor, the radial dimension span between the inner shell and the outer shell is relatively large. In order to ensure the sealing effect of the cooling water channel by the end plates of the inner shell and the outer shell, bolts must be arranged between the end plates and the inner shell and the outer shell to lock and fix them. Because if only the locking between the outer shell and the end plates is relied on, the axial stiffness of the inner shell will be insufficient due to the large span between the outer shell position (locking position) and the inner shell, thereby affecting the sealing effect of the motor housing at the inner shell position. Although the above-mentioned method of arranging bolts on both the inner shell and the outer shell ensures the sealing effect of the cooling water channel, it complicates the assembly steps of the motor and increases the manufacturing cost of the motor housing.

[0005] Summary of the Invention

[0006] Based on this, the purpose of the present invention is to provide an electric drive assembly to solve the technical problems mentioned in the above background technology.

[0007] The present invention provides an electric drive assembly, including a disc motor, wherein the disc motor includes:

[0008] A housing assembly comprising an outer shell, an inner shell, and a mounting plate connecting the outer shell and the inner shell; a cooling channel is formed between the outer shell and the inner shell; the outer shell is provided with a first inlet and a second inlet for coolant to enter and exit the cooling channel;

[0009] A sealing assembly includes a sealing cover plate, which is arranged on the end surfaces of the outer shell and the inner shell to seal the cooling channel in combination with the mounting plate. A side of the sealing cover plate facing the cooling channel is provided with a stop corresponding to the inner shell, a portion of the inner shell extends into the stop and radially seals therewith, and the sealing cover plate and the outer shell are axially sealed.

[0010] Furthermore, the electric drive assembly, wherein the electric drive assembly also includes a reducer, the stopper penetrates along the axial direction of the sealing cover plate to form a reducer shaft hole, so that the sealing cover plate can constitute a part of the reducer housing, and when the disc motor and the reducer are integrated into one, the disc motor and the reducer share the cooling channel.

[0011] Furthermore, the electric drive assembly, wherein the housing includes a first outer plate and a second outer plate, the first outer plate is located on one side of the axis direction of the mounting plate, and the second outer plate is located on the other side of the axis direction of the mounting plate;

[0012] The inner shell includes a first inner enclosure plate and a second inner enclosure plate. The first inner enclosure plate is located on a side of the mounting plate where the first outer enclosure plate is provided. A stator cavity for installing a stator is formed between the first outer enclosure plate and the first inner enclosure plate. The second inner enclosure plate is located on a side of the mounting plate where the second outer enclosure plate is provided. The cooling flow channel is formed between the second outer enclosure plate and the second inner enclosure plate. The sealing cover plate is axially sealed with the second outer enclosure plate and radially sealed with the second inner enclosure plate.

[0013] Furthermore, in the electric drive assembly, a radial annular groove is provided on the peripheral surface of the second inner panel located within the stop, and a radial sealing ring is provided in the radial annular groove, and the radial sealing ring is radially sealed and fitted between the stop and the radial annular groove.

[0014] Furthermore, in the electric drive assembly, a first axial annular groove corresponding to the second outer plate is provided on a side of the sealing cover plate facing the cooling channel, and a first axial sealing ring is provided in the first axial annular groove, and the first axial sealing ring is axially sealed and fitted between the second outer plate and the first axial annular groove.

[0015] Furthermore, in the electric drive assembly, a raised annular table is provided on a side of the sealing cover plate facing the cooling channel, the outer edge of the annular table is radially sealed with the second outer plate, and the inner edge of the annular table is radially sealed with the second inner plate.

[0016] Furthermore, in the electric drive assembly, an annular connecting plate is horizontally extended outward from the periphery of the second outer plate, a plurality of spaced mounting holes are provided on the annular connecting plate, a plurality of threaded holes corresponding to the mounting holes are provided on the sealing cover plate, and the mounting holes are used to insert a first bolt to connect the threaded holes to realize the assembly of the sealing cover plate on the housing assembly.

[0017] Furthermore, in the electric drive assembly, a first axial sealing gasket is provided between the annular connecting plate and the sealing cover plate.

[0018] Furthermore, in the electric drive assembly, the periphery of the second inner panel is provided with an annular boss axially matched with the annular table, and a second axial sealing gasket is provided between the annular boss and the annular table.

[0019] Furthermore, in the electric drive assembly, a plurality of connecting columns are provided on a side of the mounting plate facing away from the stator cavity, and a central axis position of the connecting column is sunken to form an avoidance groove, and a bottom surface of the avoidance groove is provided with a through-hole passing through the mounting plate, and the through-hole is used to insert a second bolt to connect the stator located in the stator cavity, thereby fixing the stator to the mounting plate.

[0020] Furthermore, in the electric drive assembly, a second axial annular groove is provided on the end face of the connecting column, and a second axial sealing ring is provided in the second axial annular groove, and the second axial sealing ring is axially sealed and fitted between the annular table and the second axial annular groove.

[0021] Furthermore, in the electric drive assembly, a metal isolation plate that closes the avoidance groove is welded on the connecting column.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The sealing cover plate is axially sealed against the outer shell and radially sealed against the inner shell. When assembling the sealing cover plate, it is only necessary to tighten the bolts between the outer shell and the sealing cover plate to ensure the sealing effect. There is no need to add additional bolt locking reinforcement between the sealing cover plate and the inner shell. Compared with the traditional solution of arranging bolt locking reinforcement on both the inner shell and the outer shell, this greatly simplifies the installation process and reduces the manufacturing cost of the motor housing.

[0024] 2. Since no bolts are required to reinforce the sealing cover plate and the inner shell, the sealing cover plate can be directly designed as part of the reduction gearbox, avoiding interference between the bolts at the inner shell position and the integration of the disc motor and the reduction gearbox, making the integration of the two smoother. When the disc motor and the reduction gearbox are integrated into one, the two can also share a cooling channel, further optimizing the cooling effect, while also saving space and making the structure of the entire electric drive assembly more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG1 is a perspective view of an electric drive assembly according to a first embodiment of the present invention;

[0026] FIG2 is an exploded view of the electric drive assembly in the first embodiment of the present invention from a first viewing angle;

[0027] FIG3 is an exploded view of the electric drive assembly in the first embodiment of the present invention from a second viewing angle;

[0028] FIG4 is a perspective view of an electric drive assembly according to a second embodiment of the present invention;

[0029] FIG5 is a perspective view of a housing assembly in a second embodiment of the present invention from a first viewing angle;

[0030] FIG6 is a perspective view of a housing assembly according to a second embodiment of the present invention from a second viewing angle;

[0031] FIG7 is a perspective view of a sealing cover plate according to a second embodiment of the present invention;

[0032] FIG8 is a side view of a sealing cover plate according to a second embodiment of the present invention;

[0033] FIG9 is a cross-sectional view of an electric drive assembly according to a second embodiment of the present invention;

[0034] FIG10 is a partial enlarged schematic diagram of position A in FIG9 ;

[0035] FIG11 is a partial enlarged schematic diagram of position B in FIG9 ;

[0036] FIG12 is a schematic structural diagram of a connecting column in a third embodiment of the present invention;

[0037] Main component symbols: 10, housing assembly; 11, mounting plate; 12, outer shell; 13, inner shell; 20, sealing cover; 21, Stopper; 30, stator; 121, first outer plate; 122, second outer plate; 131, first inner plate; 132, second inner plate; 41, stator cavity; 42, cooling channel; 421, first inlet and outlet; 422, second inlet and outlet; 51, radial annular groove; 52, radial sealing ring; 53, first axial annular groove; 54, first axial sealing ring; 61, annular table; 62, annular connecting plate; 63, mounting hole; 64, threaded hole; 65, first bolt; 71, first axial sealing gasket; 81, connecting column; 82, avoidance groove; 83, through hole; 84, second bolt; 85, second axial annular groove; 86, second axial sealing ring; 87, metal isolation plate; 88, combined gasket; 91, annular boss; 92, second axial sealing gasket; 100, reducer.

[0038] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0039] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The drawings illustrate several embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention.

[0040] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0042] First embodiment

[0043] Referring to Figures 1 to 3 , the electric drive assembly of the present invention includes a disc motor, which includes:

[0044] The housing assembly 10 includes an outer shell 12, an inner shell 13, and a mounting plate 11 connecting the outer shell 12 and the inner shell 13. A cooling channel 42 is formed between the outer shell 12 and the inner shell 13. The outer shell 12 is provided with a first inlet and outlet 421 and a second inlet and outlet 422 for coolant to enter and exit the cooling channel 42.

[0045] A sealing assembly includes a sealing cover plate 20, which is arranged on the end surfaces of the outer shell 12 and the inner shell 13 to seal the cooling channel 42 in combination with the mounting plate 11. The sealing cover plate 20 is provided with a stopper 21 corresponding to the inner shell 13 on a side facing the cooling channel 42. A portion of the inner shell 13 extends into the stopper 21 and is radially sealed therewith. The sealing cover plate 20 and the outer shell 12 are axially sealed.

[0046] The sealing cover plate 20 is matched with the outer shell 12 in an axial sealing manner, and is matched with the inner shell 13 in a radial sealing manner. When assembling the sealing cover plate 20, it is only necessary to tighten the bolts between the outer shell 12 and the sealing cover plate 20 to ensure the sealing effect. There is no need to provide additional bolt locking reinforcement between the sealing cover plate 20 and the inner shell 13. Compared with the traditional solution in which bolt locking reinforcement is arranged at the same time as the inner shell 13 and the outer shell 12, this greatly simplifies the installation process and reduces the manufacturing cost of the motor housing.

[0047] Second embodiment

[0048] As shown in Figures 4 to 7 , the electric drive assembly also includes a reduction gearbox 100. The stopper 21 extends through the sealing cover plate 20 along the axis to form a reduction gear shaft hole, so that the sealing cover plate 20 can constitute a portion of the housing of the reduction gearbox 100. When the sealing cover plate 20 is assembled on the housing assembly 10, the motor shaft in the housing assembly 10 can pass through the reduction gear shaft hole and mate with the reduction gear in the reduction gearbox 100.

[0049] It should be noted that during the integration of the disc motor and the reduction gearbox 100, the bolts at the position of the inner shell 13 of the disc motor are often affected, making the integration difficult. However, in this embodiment, since radial sealing is adopted between the inner shell 13 and the sealing cover plate 20, no bolts are required. This avoids the interference of the bolts on the integration of the disc motor and the reduction gearbox 100, making the integration of the two smoother. When the disc motor and the reduction gearbox 100 are integrated into one, the two can also share a cooling channel 42. The cooling channel 42 can cool the stator 30 in the stator cavity 41 on one side and cool the reduction gearbox 100 on the other side, further optimizing the cooling effect. At the same time, it can also save space and shorten the overall axial dimension, making the structure of the entire electric drive assembly more compact.

[0050] As shown in Figures 5 and 6, the center of the mounting plate 11 is provided with a motor shaft hole, and the whole is an annular circular plate. The outer shell 12 is provided at the outer edge of the annular circular plate, and the inner shell 13 is provided at the inner edge of the annular circular plate, wherein the outer shell 12 includes a first outer plate 121 and a second outer plate 122, the first outer plate 121 is located on one side of the axis direction of the mounting plate 11, and the second outer plate 122 is located on the other side of the axis direction of the mounting plate 11; the inner shell 13 includes a first inner plate 131 and a second inner plate 13 ... and the second inner plate 132 An inner panel 131 is located on the side of the mounting plate 11 where the first outer panel 121 is located. A stator cavity 41 for mounting the stator 30 is defined between the first outer panel 121 and the first inner panel 131. A second inner panel 132 is located on the side of the mounting plate 11 where the second outer panel 122 is located. The cooling channel 42 is defined between the second outer panel 122 and the second inner panel 132. A first inlet and outlet 421 and a second inlet and outlet 422 are provided on the sidewall of the second outer panel 122 for the entry and exit of a coolant. The coolant may include cooling water or cooling oil.

[0051] In actual application, when the disc motor is working, the heat generated by the stator 30 in the stator cavity 41 on one side of the mounting plate 11 can be conducted to the cooling channel 42 on the other side, and the coolant in the cooling channel 42 absorbs the heat and is discharged through the first inlet and outlet 421. The discharged coolant is then returned to the cooling channel 42 through the second inlet and outlet 422 after cooling, and this cycle is repeated, thereby achieving cooling of the disc motor.

[0052] In this embodiment, the axial dimensions of the first outer panel 121 and the first inner panel 131 are comparable, while the axial dimension of the second inner panel 132 is greater than that of the second outer panel 122. The distance by which the second inner panel 132 extends beyond the second outer panel 122 is no greater than the depth of the stop 21. This is sufficient to ensure that, after the sealing cover plate 20 is assembled, the second inner panel 132 and the stop 21 are in a concave-convex fit to achieve a radial seal. As will be appreciated, since the stop 21 of the sealing cover plate 20 and the second inner panel 132 are radially engaged, there is no need to apply axial compressive force via bolts. This eliminates the need to arrange bolts between the sealing cover plate 20 and the second inner panel 132, greatly simplifying the assembly process.

[0053] In addition, it should be noted that, in this embodiment, the inner diameter of the first inner panel 131 is larger than the motor shaft hole at the center position of the mounting plate 11, so that the inner side of the first inner panel 131 is also surrounded by a bearing chamber for installing a fixed bearing, and the inner diameter of the second inner panel 132 is consistent with the size of the motor shaft hole at the center position of the mounting plate 11 to provide stable support for the motor shaft.

[0054] Furthermore, a radial annular groove 51 is provided on the peripheral surface of the inner shell 13 within the stop 21, and a radial sealing ring 52 is disposed within the radial annular groove 51. Specifically, as shown in Figure 6, in this embodiment, the radial annular groove 51 is provided on the peripheral surface of the second inner enclosure plate 132 within the stop 21. When the sealing cover plate 20 closes the cooling flow channel 42, the radial sealing ring 52 can radially seal between the inner wall of the stop 21 and the radial annular groove 51 of the second inner enclosure plate 132.

[0055] Of course, in some other implementations of this embodiment, the radial annular groove 51 can also be set on the inner wall of the stop 21. When the sealing cover plate 20 closes the cooling channel 42, the radial sealing ring 52 can be radially sealed between the outer wall of the second inner panel 132 and the radial annular groove 51 of the stop 21.

[0056] Furthermore, a first axial annular groove 53 corresponding to the housing 12 is formed on a surface of the sealing cover plate 20 facing the cooling channel 42, and a first axial sealing ring 54 is disposed within the first axial annular groove 53. Specifically, as shown in FIG7 , in this embodiment, the first axial annular groove 53 on the sealing cover plate 20 corresponds to the second outer plate 122. When the sealing cover plate 20 closes the cooling channel 42, the first axial sealing ring 54 can axially seal between the second outer plate 122 and the first axial annular groove 53 of the sealing cover plate 20.

[0057] Of course, in some other implementations of this embodiment, the first axial annular groove 53 can also be set on the end surface of the second outer plate 122. When the sealing cover plate 20 closes the cooling channel 42, the first axial sealing ring 54 can be axially sealed and fitted between the sealing cover plate 20 and the first axial annular groove 53 of the second outer plate 122.

[0058] Thus, it can be seen that the inner housing 13 and the sealing cover plate 20 are radially sealed by the radial sealing ring 52, and the outer housing 12 and the sealing cover plate 20 are axially sealed by the first axial sealing ring 54. The two cooperate with each other to effectively prevent coolant leakage in the cooling channel 42. In addition, because the inner housing 13 and the sealing cover plate 20 adopt a radial sealing cooperation, the axial rigidity of the inner housing 13 is avoided due to the excessive span between the outer housing 12 (locking position) and the inner housing 13. Therefore, the sealing effect of the cooling channel 42 can be ensured by simply tightening the bolts between the outer housing 12 and the sealing cover plate 20, without the need for additional bolt locking reinforcement between the sealing cover plate 20 and the inner housing 13. Compared with the traditional solution of arranging bolt locking reinforcement on both the inner housing 13 and the outer housing 12, this greatly simplifies the installation process and reduces the manufacturing cost of the motor housing.

[0059] Furthermore, as shown in Figures 7 and 8, the sealing cover plate 20 has a raised annular platform 61 on its side facing the cooling channel 42. The outer edge of the annular platform 61 radially seals against the second outer plate 122, while the inner edge of the annular platform 61 radially seals against the second inner plate 132. It will be appreciated that in this embodiment, the area of ​​the annular platform 61 is comparable to that of the mounting plate 11. When the sealing cover plate 20 closes the cooling channel 42, the annular platform 61 on the sealing cover plate 20 can be inserted into the cooling channel 42 of the housing assembly 10, while the second inner plate 132 on the housing assembly 10 can be inserted into the stop 21 of the sealing cover plate 20. The two cooperate to achieve a stable and waterproof seal.

[0060] As shown in Figures 4 to 7, an annular connecting plate 62 extends horizontally outward from the periphery of the second outer plate 122. The annular connecting plate 62 is provided with a plurality of mounting holes 63 arranged at intervals. The sealing cover plate 20 is provided with a plurality of threaded holes 64 corresponding to the mounting holes 63. The mounting holes 63 are used to pass first bolts 65 to connect with the threaded holes 64, so as to achieve the assembly of the sealing cover plate 20 on the housing assembly 10.

[0061] Furthermore, referring to FIG9 , a first axial sealing gasket 71 is provided between the annular connecting plate 62 and the sealing cover plate 20 to further enhance the sealing effect between the sealing cover plate 20 and the housing 12. In actual application, the user can selectively use the first axial sealing ring 54 and / or the first axial sealing gasket 71 to seal the outer ring of the housing assembly 10 according to the required sealing level.

[0062] Furthermore, referring to Figures 9 and 11 , an annular boss 91 is provided on the periphery of the second inner enclosure plate 132, axially mating with the annular table 61. A second axial sealing gasket 92 is provided between the annular boss 91 and the annular table 61 to further enhance the sealing effect between the sealing cover plate 20 and the inner shell 13. In actual application, users can selectively use the radial sealing ring 52 and / or the second axial sealing gasket 92 to seal the inner ring of the housing assembly 10 according to the required sealing level.

[0063] As shown in Figures 6, 9 and 10, in this embodiment, the stator 30 is mounted on the mounting plate 11 by means of bolt fixation. Specifically, a plurality of connecting columns 81 are provided on a side of the mounting plate 11 facing away from the stator cavity 41. The plurality of connecting columns 81 are arranged in a circular array with the center of the mounting plate 11 as the center point. The central axis position of the connecting column 81 is sunken to form an avoidance groove 82. The bottom surface of the avoidance groove 82 is provided with a through hole 83 that passes through the mounting plate 11. It can be understood that the second bolt 84 can pass through the through hole 83 and be threadedly connected to the screw hole provided on the stator 30, thereby achieving the fixation of the stator 30 on the mounting plate 11, and the nut portion of the second bolt 84 can be accommodated in the avoidance groove 82 to avoid interference with the assembly of the sealing cover plate 20.

[0064] It should be noted that, in this embodiment, in order to prevent the coolant from overflowing from the through-hole 83 of the connecting column 81, a combined washer 88 is also provided on the second bolt 84. The combined washer 88 is formed by bonding and vulcanizing a rubber ring and a metal ring as a whole. The combined washer 88 can be pressed tightly against the bottom surface of the avoidance groove 82 by the nut part of the second bolt 84 to achieve the closure of the through-hole 83.

[0065] Furthermore, referring to Figure 10 , a second axial annular groove 85 is defined on the end surface of the connecting post 81, and a second axial sealing ring 86 is disposed within the second axial annular groove 85. When the sealing cover plate 20 seals the cooling channel 42, the second axial sealing ring 86 axially seals between the annular table 61 and the second axial annular groove 85 of the connecting post 81, thereby further preventing coolant from overflowing. Of course, in other implementations of this embodiment, the second axial annular groove 85 may also be defined on the annular table 61. When the sealing cover plate 20 seals the cooling channel 42, the second axial sealing ring 86 axially seals between the connecting post 81 and the second axial annular groove 85 of the annular table 61.

[0066] It is also worth mentioning that the location of the connecting column 81 within the cooling channel 42 has a certain impact on the flow of the coolant, causing appropriate turbulence when the coolant flows through the connecting column 81, increasing the flow rate and thus enhancing the cooling effect. Specifically, in this embodiment, the cylindrical shape of the connecting column 81 can form a more stable flow state when the coolant flows through the connecting column 81, reducing fluid fluctuations and turbulence, thereby improving the stability and reliability of the cooling system.

[0067] In summary, in the electric drive assembly of the above-described embodiment of the present invention, the sealing cover plate 20 employs an axial seal with the outer shell 12 and a radial seal with the inner shell 13. This allows for sealing during assembly by simply tightening the bolts between the outer shell 12 and the sealing cover plate 20, eliminating the need for additional bolt reinforcement between the sealing cover plate 20 and the inner shell 13. This significantly simplifies the installation process and reduces the manufacturing cost of the motor housing compared to conventional solutions that require bolt reinforcement on both the inner shell 13 and the outer shell 12. Furthermore, since bolt reinforcement is not required between the sealing cover plate 20 and the inner shell 13, the sealing cover plate 20 can be directly integrated into the reduction gearbox 100. This prevents the bolts on the inner shell 13 from interfering with the integration of the disc motor and reduction gearbox 100, making their integration smoother. When the disc motor and reduction gearbox 100 are integrated, they can share a common cooling channel 42, further optimizing cooling efficiency while also saving space and making the overall electric drive assembly more compact.

[0068] Third embodiment

[0069] Please refer to Figure 12, which shows the electric drive assembly in the third embodiment of the present invention. The difference between the electric drive assembly in this embodiment and the electric drive assembly in the second embodiment is that a metal isolation plate 87 is provided on the connecting column 81 to close the avoidance groove 82. The metal isolation plate 87 is fixed in the avoidance groove 82 of the connecting column 81 by welding to ensure that the coolant in the cooling channel 42 will not overflow from the perforation 83 to the inside of the motor.

[0070] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0071] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. An electric drive assembly, comprising a disc motor, characterized in that: The disc motor comprises: A shell assembly, the shell assembly comprising an outer shell, an inner shell and a mounting plate connecting the two, a cooling channel is formed between the outer shell and the inner shell, and the outer shell is provided with a first inlet and a second inlet for coolant to enter and exit the cooling channel; A sealing assembly, wherein the sealing assembly comprises a sealing cover plate, wherein the sealing cover plate is arranged on the end surfaces of the outer shell and the inner shell to close the cooling channel in combination with the mounting plate, wherein a stop corresponding to the inner shell is provided on a side of the sealing cover plate facing the cooling channel, wherein a portion of the inner shell extends into the stop and radially seals with the stop, and the sealing cover plate and the outer shell are axially sealed.

2. The electric drive assembly according to claim 1, characterized in that: The electric drive assembly also includes a reduction gear box, and the stopper penetrates along the axial direction of the sealing cover plate to form a reduction gear shaft hole, so that the sealing cover plate can constitute a part of the reduction gear box housing, and when the disc motor is integrated with the reduction gear box, the disc motor and the reduction gear box share the cooling channel.

3. The electric drive assembly according to claim 1, characterized in that: The housing comprises a first outer plate and a second outer plate, wherein the first outer plate is located on one side of the axis direction of the mounting plate, and the second outer plate is located on the other side of the axis direction of the mounting plate; The inner shell includes a first inner enclosure plate and a second inner enclosure plate, the first inner enclosure plate is located on a side of the mounting plate where the first outer enclosure plate is provided, a stator cavity for installing a stator is formed between the first outer enclosure plate and the first inner enclosure plate, the second inner enclosure plate is located on a side of the mounting plate where the second outer enclosure plate is provided, the cooling flow channel is formed between the second outer enclosure plate and the second inner enclosure plate, and the sealing cover plate is axially sealed with the second outer enclosure plate and radially sealed with the second inner enclosure plate.

4. The electric drive assembly according to claim 3, characterized in that: A radial annular groove is provided on the peripheral surface of the second inner enclosure plate located in the stopper, and a radial sealing ring is provided in the radial annular groove. The radial sealing ring is radially sealed and fitted between the stopper and the radial annular groove.

5. The electric drive assembly according to claim 3, characterized in that: A first axial annular groove corresponding to the second outer plate is provided on a side of the sealing cover plate facing the cooling channel, and a first axial sealing ring is provided in the first axial annular groove. The first axial sealing ring is axially sealed between the second outer plate and the first axial annular groove.

6. The electric drive assembly according to claim 3, characterized in that: A raised annular table is provided on one side of the sealing cover plate facing the cooling channel, the outer edge of the annular table is radially sealed with the second outer plate, and the inner edge of the annular table is radially sealed with the second inner plate.

7. The electric drive assembly according to claim 3, characterized in that: An annular connecting plate is horizontally extended outward from the periphery of the second outer plate, and a plurality of installation holes arranged at intervals are opened on the annular connecting plate. A plurality of threaded holes corresponding to the installation holes are provided on the sealing cover plate, and the installation holes are used to insert the first bolts to connect the threaded holes, so as to realize the assembly of the sealing cover plate on the shell assembly.

8. The electric drive assembly according to claim 7, characterized in that: A first axial sealing gasket is provided between the annular connecting plate and the sealing cover plate.

9. The electric drive assembly according to claim 6, characterized in that: An annular boss axially matched with the annular table surface is provided on the periphery of the second inner enclosure plate, and a second axial sealing gasket is provided between the annular boss and the annular table surface.

10. The electric drive assembly according to claim 6, characterized in that: A plurality of connecting columns are provided on a side of the mounting plate facing away from the stator cavity, and a central axis position of the connecting column is sunken to form an avoidance groove, and a through hole penetrating the mounting plate is provided on the bottom surface of the avoidance groove, and the through hole is used to insert a second bolt to connect the stator located in the stator cavity, thereby fixing the stator on the mounting plate.

11. The electric drive assembly according to claim 10, characterized in that: A second axial annular groove is provided on the end surface of the connecting column, and a second axial sealing ring is provided in the second axial annular groove. The second axial sealing ring is axially sealed and fitted between the annular table and the second axial annular groove.

12. The electric drive assembly according to claim 10, characterized in that: A metal isolation plate closing the avoidance groove is welded on the connecting column.

Images