Electric drive assembly and electric two-wheeled vehicle

Abstract

The utility model discloses a kind of electric drive assembly and electric two-wheeled vehicle, comprising: first casing, first cooling flow passage is equipped in it;Speed reducer body, is installed in the first casing;Second casing, with the first casing detachably connected, second cooling flow passage is equipped in it;Controller, is installed in the second casing, and with the first cooling flow passage thermal coupling;Motor body, is installed in the second casing, and with the second cooling flow passage thermal coupling;Wherein, the first cooling flow passage and the second cooling flow passage are formed by casing joint surface for the continuous cooling circuit of cooling liquid circulation flow circulation.The utility model uses above structure, cooling performance is good, and motor body, controller and speed reducer body can be cooled simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle drive technology, and in particular to an electric drive assembly and an electric two-wheeler. Background Technology

[0002] The drive system of an electric two-wheeler typically consists of three parts: a motor, a controller, and a reducer. During operation, the drive system generates heat, and prolonged exposure to high temperatures can affect its performance and lifespan. For example, Chinese invention patent CN117748829A discloses an electric motorcycle drive system with an air-cooled outer panel to cool the motor and controller. However, the air-cooled structure has relatively poor heat dissipation performance and is also difficult to effectively cool the reducer.

[0003] Therefore, it is necessary to improve the existing technology to overcome the aforementioned defects. Utility Model Content

[0004] The purpose of this invention is to provide an electric drive assembly and an electric two-wheeler with excellent cooling performance, capable of simultaneously cooling the motor body, controller and reducer body.

[0005] The purpose of this utility model is achieved through the following technical solution: an electric drive assembly, comprising:

[0006] The first casing has a first cooling channel inside it;

[0007] The reducer body is installed in the first housing;

[0008] The second housing is detachably connected to the first housing and has a second cooling channel inside it;

[0009] The controller is mounted in the second housing and is thermally coupled to the first cooling channel;

[0010] The motor body is mounted on the second housing and is thermally coupled to the second cooling channel;

[0011] The first cooling channel and the second cooling channel form a continuous cooling circuit for the circulation of coolant through the casing joint surface.

[0012] Furthermore, the first housing includes:

[0013] A reducer housing for accommodating the reducer body;

[0014] The center horizontal fork is integrated into the reducer housing;

[0015] The first cooling channel is located in the middle flat fork, and the reducer body is thermally coupled to the first cooling channel.

[0016] Furthermore, a cooling groove is formed by an inward recess at the joint end of the first housing and the second housing, and a cover plate is sealed at the cooling groove. The cooling groove and the cover plate cooperate to form the first cooling flow channel, and the controller is adjacent to the cover plate.

[0017] Furthermore, the second housing includes:

[0018] A control housing having a control cavity for accommodating the controller;

[0019] The motor housing has a motor cavity for accommodating the motor body;

[0020] The control housing and the motor housing are both connected to the first housing, the first cooling channel corresponds to the control cavity, and the second cooling channel corresponds to the motor cavity.

[0021] Furthermore, the second housing includes:

[0022] The front housing includes a first portion and a second portion integrated into the first portion;

[0023] The rear housing includes a third part and a fourth part integrated into the third part, wherein the first part and the third part cooperate to form the control housing, and the second part and the fourth part cooperate to form the motor housing;

[0024] The front housing is spliced ​​between the rear housing and the first housing.

[0025] Furthermore, the end face where the control housing engages with the first housing forms an open side of the control cavity, and the outer wall of the first housing corresponding to the first cooling channel is adapted to cover the open side of the control cavity.

[0026] Furthermore, the motor body is an axial flux motor, which includes a stator, and the second cooling channel is formed between the stator and the motor cavity. Coolant is adapted to flow into the second cooling channel and immerse the stator.

[0027] Furthermore, the first cooling channel includes:

[0028] The inlet section has a first liquid inlet at one end that communicates with the outside, and a first liquid outlet at the other end.

[0029] The reflux section has a second liquid inlet at one end and a second liquid outlet that communicates with the outside at the other end.

[0030] The second cooling channel is provided with a third liquid inlet and a third liquid outlet at both ends. When the first housing and the second housing are joined, the first liquid outlet is connected to the third liquid inlet, and the second liquid inlet is connected to the third liquid outlet.

[0031] Furthermore, the motor shaft of the motor body and the input shaft of the reducer body are integrally formed, and the ratio of the axial thickness of the motor body to that of the reducer body is 0.8:1 to 1.2:1.

[0032] In addition, this utility model also provides an electric two-wheeled vehicle, including the aforementioned electric drive assembly.

[0033] Compared with the prior art, the present invention has the following advantages: The present invention, by setting a first cooling channel and a second cooling channel, forms a continuous cooling circuit for coolant flow, thereby cooling and dissipating heat from the controller and motor body respectively. Compared with the air-cooled structure, the heat dissipation effect is better. By placing the first cooling channel in the first housing where the reducer body is installed, and the second cooling channel in the second housing where the controller and motor body are installed, the split-channel design simplifies the complexity of a single housing, distributes design pressure, avoids overcrowding inside the second housing, reduces processing and assembly difficulty, and the two are connected through the housing joint surface, avoiding the need for additional piping, resulting in a simpler structure. Since both the motor body and the controller are high-heat-generating components, placing the first cooling channel for cooling the controller in the first housing reduces the cross-influence of heat sources, optimizes the heat dissipation path, and improves heat dissipation performance. The first cooling channel can also simultaneously provide auxiliary heat dissipation for the reducer body. Furthermore, distributing the cooling channels across the two housings helps to balance the overall weight distribution of the electric drive assembly, reducing vibration or installation stability problems caused by excessive weight on one side. Attached Figure Description

[0034] Figure 1 This is a cross-sectional schematic diagram of the electric drive assembly of this utility model.

[0035] Figure 2 This is a structural diagram of the first and second housings of the electric drive assembly of this utility model when disassembled.

[0036] Figure 3 yes Figure 2 A structural diagram in another direction.

[0037] Figure 4 yes Figure 2 A schematic diagram of the structure after removing the cover plate.

[0038] Figure 5 This is a schematic diagram of the internal flow channel of the first housing in this utility model.

[0039] Figure 6 This is a structural schematic diagram of the second housing of the electric drive assembly of this utility model when disassembled.

[0040] Explanation of reference numerals in the attached figures:

[0041] 100. First housing; 110. Reducer housing; 120. Middle horizontal fork; 121. First cooling channel; 1211. Inlet section; 1212. Return section; 1213. First liquid inlet; 1214. First liquid outlet; 1215. Second liquid inlet; 1216. Second liquid outlet; 122. Cooling tank; 1221. Long side wall; 1222. Short side wall; 123. Cover plate; 124. Flow guiding structure; 1241. Flow guiding rib; 1242. Flow divider block; 1243. Separator block; 125. Heat dissipation fins; 130. Connector; 200. Reducer Speed ​​reducer body; 300, second housing; 310, control housing; 311, control cavity; 320, motor housing; 321, second cooling channel; 3211, third liquid inlet; 3212, third liquid outlet; 322, motor cavity; 330, front housing; 331, first part; 3311, first mounting part; 332, second part; 3321, second mounting part; 340, rear housing; 341, third part; 342, fourth part; 400, controller; 500, motor body; 510, motor shaft; 520, stator; 530, rotor. Detailed Implementation

[0042] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not the entire structure. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0043] The terms “comprising” and “having”, and any variations thereof, used in this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0044] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0045] Please see Figures 1 to 3 As shown, the electric drive assembly corresponding to a preferred embodiment of the present invention includes: a first housing 100, which has a first cooling channel 121 therein; a reducer body 200, which is installed in the first housing 100; a second housing 300, which is detachably connected to the first housing 100 and has a second cooling channel 321 therein; a controller 400, which is installed in the second housing 300 and is thermally coupled to the first cooling channel 121; and a motor body 500, which is installed in the second housing 300 and is thermally coupled to the second cooling channel 321; wherein the first cooling channel 121 and the second cooling channel 321 form a continuous cooling circuit for the circulation of coolant through the housing joint surface.

[0046] This invention, by setting up a first cooling channel 121 and a second cooling channel 321, forms a continuous cooling circuit for coolant flow, thereby cooling the controller 400 and the motor body 500 respectively. Compared with an air-cooled structure, the heat dissipation effect is better. By placing the first cooling channel 121 on the first housing 100 where the reducer body 200 is installed, and the second cooling channel 321 on the second housing 300 where the controller 400 and the motor body 500 are installed, the split channel simplifies the complexity of a single housing, can distribute design pressure, and avoids the second housing 300... The compact internal layout reduces processing and assembly difficulty, and the two are connected through the housing joint surface, avoiding the need for additional piping and simplifying the structure. Since both the motor body 500 and the controller 400 are high-heat-generating components, placing the first cooling channel 121 of the cooling controller 400 in the first housing 100 can reduce the cross-influence of heat sources, optimize the heat dissipation path, and improve heat dissipation performance. In addition, the first cooling channel 121 can also simultaneously provide auxiliary heat dissipation for the reducer body 200. Furthermore, distributing the cooling channels to the two housings helps to balance the overall weight distribution of the electric drive assembly and reduce vibration or installation stability problems caused by excessive weight on one side.

[0047] Furthermore, the first housing 100 includes a reducer housing 110 and a center fork 120. The reducer housing 110 houses the reducer body 200, and the center fork 120 is integrated into the reducer housing 110. The integrated center fork 120 is lightweight, resulting in a lighter side-mounted mass for the electric two-wheeler, leading to a more balanced left-right weight distribution and smoother overall vehicle operation. A first cooling channel 121 is located on the center fork 120. The cavity of the reducer housing 110 housing the reducer body 200 is adjacent to the first cooling channel 121, allowing the reducer body 200 to be thermally coupled with the first cooling channel 121, enabling the coolant within the first cooling channel 121 to carry away heat from the reducer body 200.

[0048] In this embodiment, the center fork 120 is connected to the periphery of the reducer housing 110 and extends radially outward along the reducer housing 110. The center fork 120 is generally a square plate structure, with its length direction parallel to the extension direction and its width direction perpendicular to the extension direction. A connector 130 is integrated at the extended end of the center fork 120, which is used to connect with the frame of the electric two-wheeled vehicle. The portion of the second housing 300 used to mount the controller 400 engages with the center fork 120, allowing the first cooling channel 121 to act on the controller 400. The portion of the second housing 300 used to mount the motor body 500 engages with the reducer housing 110 to facilitate the transmission connection between the motor body 500 and the reducer body 200.

[0049] Furthermore, referring to Figure 2 and Figure 4 As shown, a cooling groove 122 is formed by an inwardly recessed end face where the first housing 100 and the second housing 300 meet. Specifically, the cooling groove 122 is formed by an inwardly recessed end face of the central fork 120. A cover plate 123 is placed over the cooling groove 122, and the cooling groove 122 and cover plate 123 cooperate to form a sealed first cooling channel 121. The controller 400 is adjacent to the cover plate 123. Preferably, the meeting end faces of the cover plate 123 and the central fork 120 are flush, making it easier to form a thermally conductive interface between the cover plate 123 and the second housing 300 after the first housing 100 and the second housing 300 are joined, thus facilitating the transfer of heat from the controller 400. The cover plate 123 can be made of a metal with high thermal conductivity to efficiently remove heat from the controller 400.

[0050] Preferably, in this embodiment, the cooling groove 122 is a square groove adapted to the outer contour of the center crossbar 120, so that its cooling range covers the center crossbar 120 to the greatest extent. A flow guiding structure 124 is provided inside the cooling groove 122 to guide the coolant to flow along a predetermined path, allowing the coolant to flow evenly to all positions of the cooling groove 122, thus evenly covering the cover plate 123 and improving heat dissipation. The flow guiding structure 124 protrudes from the bottom of the cooling groove 122 and extends upward to the opening of the cooling groove 122. The top of the flow guiding structure 124 abuts against the cover plate 123, thereby defining the predetermined flow path. Preferably, the flow guiding structure 124 is integrally formed with the center crossbar 120, simplifying the assembly process.

[0051] Furthermore, combined Figure 5 As shown, the flow guiding structure 124 includes flow guiding ribs 1241, with multiple flow guiding ribs 1241 spaced apart along the width direction of the cooling tank 122. A channel for the flow of liquid cooling medium is formed between adjacent flow guiding ribs 1241 and / or between the flow guiding ribs 1241 and the sidewall of the cooling tank 122. The flow guiding ribs 1241 define the flow path of the first cooling channel 121. In this embodiment, a channel is formed between the long sidewall 1221 of the cooling tank 122 and the flow guiding ribs 1241, and an opening is formed between the short sidewall 1222 and the flow guiding ribs 1241 to connect the beginning and end of two adjacent channels, resulting in a continuous S-shaped layout of the first cooling channel 121 to improve heat dissipation. Since the cooling tank 122 has a large length dimension, the flow guiding ribs 1241 are preferably linear strip structures, with their length direction parallel to the length direction of the cooling tank 122, to facilitate processing and shaping.

[0052] Preferably, there is no partition between the cooling groove 122 and the periphery of the reducer housing 110, that is, one of the short sidewalls 1222 of the cooling groove 122 is formed by a portion of the periphery of the reducer housing 110, making it easier for the first cooling channel 121 to act on the reducer body 200. Preferably, the outer surface of the middle flat fork 120 corresponding to the first cooling channel 121 can also be provided with heat dissipation fins 125 to cooperate with the first cooling channel 121 to cool the reducer body 200.

[0053] Furthermore, the flow guiding structure 124 includes a flow divider 1242 disposed in the first cooling channel 121. Multiple flow dividers 1242 are arranged along the flow direction of the coolant. When the coolant flows into the first cooling channel 121, the flow dividers 1242 can divide the coolant, so that even when the channel width is wide, the coolant can flow evenly to various positions in the channel.

[0054] Furthermore, the first cooling channel 121 includes a non-connected inlet section 1211 and a return section 1212. One end of the inlet section 1211 has a first liquid inlet 1213 communicating with the outside, and the other end has a first liquid outlet 1214. One end of the return section 1212 has a second liquid inlet 1215, and the other end has a second liquid outlet 1216 communicating with the outside. The second cooling channel 321 has a third liquid inlet 3211 and a third liquid outlet 3212 at both ends. When the first housing 100 and the second housing 300 are joined, the first liquid outlet 1214 communicates with the third liquid inlet 3211, and the second liquid inlet 1215 communicates with the third liquid outlet 3212. External coolant can flow into the inlet section 1211 from the first inlet 1213, and then flow through the inlet section 1211, the first outlet 1214, the third inlet 3211, the second cooling channel 321, the third outlet 3212, and the second inlet 1215 to the return section 1212. The coolant in the return section 1212 can flow back to the outside from the second outlet 1216.

[0055] Specifically, a partition block 1243 connects one of the long sidewalls 1221 and the adjacent guide rib 1241. The partition block 1243 defines one end of the inlet section 1211 on the side facing away from the reducer housing 110, and defines one end of the return section 1212 on the side facing the reducer housing 110. The short sidewall 1222 formed by the reducer housing 110 defines the other end of the inlet section 1211 and the return section 1212, respectively. The inlet section 1211 has a continuous S-shaped layout and covers most of the cover plate 123. The return section 1212 is formed between the long sidewall 1221 and the guide rib 1241 adjacent to the long sidewall 1221. The partition block 1243 defining the two ends of the return section 1212 and the short sidewall 1222 are arranged opposite to each other.

[0056] Because the motor body 500 generates a lot of heat, the coolant temperature after cooling the motor body 500 is also high. After flowing back to the return section 1212, it is difficult to effectively cool the controller 400. With the above structure, the inlet section 1211 covers most of the cover plate 123 to avoid affecting the heat dissipation of the controller 400.

[0057] Furthermore, the first liquid inlet 1213 and the second liquid outlet 1216 are both located on the same long side wall 1221 to facilitate connection with the external cooling system. The first liquid outlet 1214 and the second liquid inlet 1215 are both located on the cover plate 123 and are adjacent to the short side wall 1222 formed by the reducer housing 110, and thus close to the part of the second housing 300 that houses the motor body 500, to facilitate connection with the second cooling channel 321.

[0058] Furthermore, referring to Figures 1 to 3As shown, the second housing 300 includes a control housing 310 and a motor housing 320. The control housing 310 is connected to the periphery of the motor housing 320 and extends radially along the motor housing 320. The outline of the control housing 310 is adapted to the outline of the center fork 120 and engages with the center fork 120. The outline of the motor housing 320 is adapted to the outline of the reducer housing 110 and engages with the reducer housing 110. That is, both the control housing 310 and the motor housing 320 are engaged with the first housing 100. A control cavity 311 for accommodating the controller 400 is formed within the control housing 310, and a motor cavity 322 for accommodating the motor body 500 is formed within the motor housing 320. A first cooling channel 121 corresponds to the control cavity 311, and a second cooling channel 321 corresponds to the motor cavity 322.

[0059] Both the third inlet 3211 and the third outlet 3212 are located on the end face where the motor housing 320 meets the first housing 100. The third inlet 3211 corresponds to the first outlet 1214, and the third outlet 3212 corresponds to the second inlet 1215. When the first housing 100 and the second housing 300 are joined, the third inlet 3211 and the first outlet 1214 fit tightly together, and the third outlet 3212 and the second inlet 1215 fit tightly together. A sealing element can be provided on the end face of the cover plate 123 and / or the motor housing 320 to improve the sealing performance after connection. With the above structure, the first housing 100 and the second housing 300 are easy to assemble and disassemble, and no additional connecting pipeline is required between them, resulting in a simple structure.

[0060] Furthermore, combined Figure 6 As shown, the second housing 300 includes a front housing 330 and a rear housing 340. The front housing 330 includes a first portion 331 and a second portion 332 integrated into the first portion 331. The rear housing 340 includes a third portion 341 and a fourth portion 342 integrated into the third portion 341. The first portion 331 and the third portion 341 cooperate to form a control housing 310, and the second portion 332 and the fourth portion 342 cooperate to form a motor housing 320. The front housing 330 is spliced ​​between the rear housing 340 and the first housing 100.

[0061] By adopting the above structure, when disassembling and assembling the controller 400 and / or the motor body 500, only the rear housing 340 needs to be removed to open the control cavity 311 and the motor cavity 322, so that the second housing 300 does not need to be completely removed from the first housing 100, making assembly and maintenance more convenient.

[0062] Furthermore, the first portion 331 is recessed inward from the end face away from the first housing 100 to form a first mounting portion 3311. The rear housing 340 is adapted to cover the first mounting portion 3311 to form a control cavity 311. A heat-conducting interface is formed between the recessed end of the first mounting portion 3311 and the cover plate 123. As a preferred embodiment, the first mounting portion 3311 extends to the other end face of the first portion 331. The end face of the control housing 310 that engages with the first housing 100 forms an open side of the control cavity 311. The outer wall of the first housing 100 corresponding to the first cooling channel 121 is adapted to cover the open side of the control cavity 311, that is, the cover plate 123 is adapted to cover the open side, so that the controller 400 installed in the control cavity 311 can directly contact the cover plate 123, which has a better heat dissipation effect than indirect contact.

[0063] Furthermore, the motor body 500 preferably adopts an axial flux motor, with the air gap surface perpendicular to the motor shaft 510 of the motor body 500. Its short axial distance, combined with the reducer body 200, allows it to occupy less wheel-side space, providing more usable and passenger space for the rear wheels of the vehicle. More specifically, in this embodiment, the motor body 500 is a dual-rotor, single-stator axial flux motor. The motor body 500 has high output power, solving the problem that high-power two-wheeled vehicle electric drive assemblies must be centrally located, and avoiding intrusion into the vehicle's under-seat space. The motor body 500 includes a single stator 520 and two rotors 530, with the stator 520 coaxially arranged between the two rotors 530.

[0064] In one embodiment, the second cooling channel 321 is a water-cooled structure located in the motor cavity 322. A heat-conducting interface is formed between its inner wall and the inner wall of the motor cavity 322. However, using a heat-conducting interface to cool the motor body 500 results in relatively low heat dissipation efficiency. Preferably, in this embodiment, the second cooling channel 321 is an oil-cooled structure formed between the stator 520 and the motor cavity 322. The coolant is cooling oil, and the coolant flowing into the second cooling channel 321 can immerse the stator 520 to achieve cooling. Compared to the water-cooled structure, the coolant in the oil-cooled structure can directly contact the stator 520, resulting in higher cooling efficiency.

[0065] Specifically, the second part 332 is recessed inward from the end face away from the first housing 100 to form a second mounting part 3321. The second mounting part 3321 extends to the end face facing the first housing 100. The stator 520 is housed in the second mounting part 3321. A second cooling channel 321 is formed between the second mounting part 3321 and the stator 520. End caps mounted on the second mounting part 3321 can be provided on both sides of the stator 520 in the axial direction to close the second cooling channel 321 and ensure that the coolant can only flow from the third inlet. The housing 340 is adapted to cover one rotor 530, and the reducer housing 110 is adapted to cover the other rotor 530. The inner wall of the second mounting part 3321 is provided with an inlet channel (not shown) and an outlet channel (not shown). The inlet channel extends to the third inlet port 3211 and the outlet channel extends to the third outlet port 3212. The coolant can flow into the second cooling channel 321 in sequence through the third inlet port 3211 and the inlet channel, and flow out of the second cooling channel 321 from the outlet channel and the third outlet port 3212.

[0066] Furthermore, the motor shaft 510 of the motor body 500 and the input shaft of the reducer body 200 are integrally formed to simplify the overall structure and further reduce the axial thickness of the assembled motor body 500 and reducer body 200. Preferably, the ratio of the axial thickness of the motor body 500 and the reducer body 200 is close to 1:1, specifically 0.8:1 to 1.2:1. With the above-mentioned proportion, the overall mass distribution of the electric drive assembly is more balanced after installation in the electric two-wheeled vehicle, resulting in smoother vehicle operation.

[0067] The cooling process of the electric drive assembly of this utility model is as follows: the coolant flows into the inlet section 1211 from the first inlet 1213, and flows along the inlet section 1211 to the first outlet 1214. During this process, the heat of the controller 400 can be transferred to the coolant through the cover plate 123 to achieve heat dissipation of the controller 400. At the same time, since the reducer body 200 is arranged adjacent to the first cooling channel 121, the coolant can also cool the reducer body 200. Then the coolant flows into the second cooling channel 321 through the first outlet 1214 and the third inlet 3211 to soak the entire winding of the stator 520, thereby achieving direct cooling of the stator 520. Afterward, the coolant flows into the return section 1212 through the third outlet 3212 and the second inlet 1215, and flows to the outside from the second outlet 1216.

[0068] In addition, this utility model also provides an electric two-wheeled vehicle, including the aforementioned electric drive assembly.

[0069] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. An electric drive assembly, characterized in that, include: The first housing (100) has a first cooling channel (121) inside; The reducer body (200) is installed on the first housing (100); The second housing (300) is detachably connected to the first housing (100) and has a second cooling channel (321) inside. The controller (400) is mounted in the second housing (300) and is thermally coupled to the first cooling channel (121); The motor body (500) is mounted on the second housing (300) and is thermally coupled to the second cooling channel (321); The first cooling channel (121) and the second cooling channel (321) form a continuous cooling circuit for the circulation of coolant through the housing joint surface.

2. The electric drive assembly as described in claim 1, characterized in that, The first housing (100) includes: A reducer housing (110) is used to house the reducer body (200); The center horizontal fork (120) is integrated into the reducer housing (110); The first cooling channel (121) is located in the middle flat fork (120), and the reducer body (200) is thermally coupled to the first cooling channel (121).

3. The electric drive assembly as described in claim 1, characterized in that, A cooling groove (122) is formed by an inward recess at the end face where the first housing (100) and the second housing (300) meet. A cover plate (123) is sealed at the cooling groove (122). The cooling groove (122) and the cover plate (123) cooperate to form the first cooling channel (121). The controller (400) is adjacent to the cover plate (123).

4. The electric drive assembly as described in claim 1, characterized in that, The second housing (300) includes: The control housing (310) has a control cavity (311) for accommodating the controller (400); The motor housing (320) has a motor cavity (322) for accommodating the motor body (500); The control housing (310) and the motor housing (320) are both connected to the first housing (100), the first cooling channel (121) corresponds to the control cavity (311), and the second cooling channel (321) corresponds to the motor cavity (322).

5. The electric drive assembly as described in claim 4, characterized in that, The second housing (300) includes: The front housing (330) includes a first portion (331) and a second portion (332) integrated into the first portion (331); The rear housing (340) includes a third part (341) and a fourth part (342) integrated into the third part (341), wherein the first part (331) and the third part (341) cooperate to form the control housing (310), and the second part (332) and the fourth part (342) cooperate to form the motor housing (320); The front housing (330) is spliced ​​between the rear housing (340) and the first housing (100).

6. The electric drive assembly as described in claim 4, characterized in that, The end face of the control housing (310) that engages with the first housing (100) forms an open side of the control cavity (311), and the outer wall of the first housing (100) corresponding to the first cooling channel (121) is adapted to cover the open side of the control cavity (311).

7. The electric drive assembly as described in claim 4, characterized in that, The motor body (500) is an axial flux motor, which includes a stator (520). The second cooling channel (321) is formed between the stator (520) and the motor cavity (322). Coolant is adapted to flow into the second cooling channel (321) and immerse the stator (520).

8. The electric drive assembly as described in claim 1, characterized in that, The first cooling channel (121) includes: The inlet section (1211) has a first liquid inlet (1213) at one end that communicates with the outside, and a first liquid outlet (1214) at the other end. The reflux section (1212) has a second liquid inlet (1215) at one end and a second liquid outlet (1216) communicating with the outside at the other end; The second cooling channel (321) is provided with a third liquid inlet (3211) and a third liquid outlet (3212) at both ends. When the first housing (100) and the second housing (300) are joined, the first liquid outlet (1214) is connected to the third liquid inlet (3211), and the second liquid inlet (1215) is connected to the third liquid outlet (3212).

9. The electric drive assembly as claimed in claim 1, characterized in that, The motor shaft (510) of the motor body (500) and the input shaft of the reducer body (200) are integrally formed, and the ratio of the axial thickness of the motor body (500) to the reducer body (200) is 0.8:1 to 1.2:

1.

10. An electric two-wheeled vehicle, characterized in that, Includes the electric drive assembly as described in any one of claims 1 to 9.

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