Drive units and electric vehicles

Abstract

This application relates to the field of electric vehicle technology, and discloses a drive device and an electric vehicle. The drive device includes a housing, a first cover, a fan, a stator assembly, and a drive shaft. The housing includes an integrally formed main body and a mounting part. The main body has a first mounting cavity, and the housing has a first air duct passing through the mounting part. The first cover is connected to the mounting part, and the first cover and the mounting part enclose a second mounting cavity, in which a first circuit board is disposed. The stator assembly is disposed in the first mounting cavity and is electrically connected to the first circuit board. The drive shaft passes through the first mounting cavity and cooperates with the stator assembly. The axial direction of the drive shaft is parallel to the through direction of the first air duct. One end of the drive shaft is used to connect to an external device, and the other end of the drive shaft is connected to the fan to drive the fan to drive airflow through the first air duct. Through the above method, the embodiments of this application have the advantages of good heat dissipation, small size, light weight, and low production cost.

Description

Technical Field

[0001] This application relates to the field of electric vehicle technology, and in particular to a drive device and an electric vehicle. Background Technology

[0002] The drive unit of an electric tricycle includes a motor and an electronic control box. The motor converts electrical energy into mechanical energy to propel the vehicle, while the circuit board inside the control box controls the motor's operation. Currently, in electric tricycles, the motor and control box are separately located in different positions on the vehicle body. The control box is fixed to the body by a metal tray, which serves to support the control box and absorb its heat. This separate design occupies more space, and the control box requires an additional metal tray for fixation and heat dissipation, resulting in higher cost and greater weight. Utility Model Content

[0003] In view of the problems existing in the background art, the purpose of this application is to provide a drive device and an electric vehicle that overcomes or at least partially solves the above problems.

[0004] According to a first aspect of this application, a drive device is provided, including a housing, a first cover, a fan, a stator assembly, and a drive shaft. The housing includes an integrally formed main body and a mounting portion. The main body has a first mounting cavity, and the housing has a first air duct passing through the mounting portion. The first cover is connected to the mounting portion, and the first cover and the mounting portion enclose a second mounting cavity, within which a first circuit board is disposed. The fan is mounted on the housing, along the through direction of the first air duct, and is located on one side of the housing. The stator assembly is disposed within the first mounting cavity and is electrically connected to the first circuit board. The drive shaft passes through the first mounting cavity and cooperates with the stator assembly. The axial direction of the drive shaft is parallel to the through direction of the first air duct. One end of the drive shaft is used to connect to an external device, and the other end of the drive shaft is connected to the fan to drive the fan to drive airflow through the first air duct.

[0005] In one or more of the above optional embodiments, along the through direction of the first air duct, the first air duct includes an air inlet and an air outlet arranged opposite to each other, and the air inlet includes a first inlet and a second inlet arranged at intervals. The cross-sectional area of ​​the air outlet is greater than the sum of the cross-sectional areas of the first inlet and the second inlet.

[0006] In one or more of the above optional embodiments, the outer wall of the main body is provided with a plurality of heat dissipation fins, the heat dissipation fins extend along the through direction of the first air duct, a second air duct is formed between adjacent heat dissipation fins, and the fan is also used to drive airflow through the second air duct.

[0007] In one or more of the above optional embodiments, a fan cover is also included. The fan cover is disposed on the housing, and the fan cover and the housing enclose a heat dissipation cavity. The fan is disposed in the heat dissipation cavity. The fan cover is provided with ventilation holes, which connect the heat dissipation cavity to the outside. Along the through direction of the first air duct, the heat dissipation cavity is connected to the first air duct and the second air duct.

[0008] In one or more of the above optional embodiments, the mounting part includes a mounting plate, which is disposed at a distance from the main body in a direction perpendicular to the through direction of the first air duct. The mounting plate includes a first surface and a second surface disposed opposite to each other, with the second surface facing the main body and defining the first air duct between the second surface and the main body. A first cover is disposed on the side of the mounting plate opposite to the second surface. A first circuit board is disposed opposite to the first surface, and a power device is disposed on the side of the first circuit board facing the first surface, with the power device attached to the first surface.

[0009] In one or more of the above optional embodiments, the mounting part includes a connecting post connected between the mounting plate and the main body. The housing has a communicating hole that sequentially passes through the mounting plate, the connecting post, and the side wall of the main body facing the mounting plate. The communicating hole connects the first mounting cavity and the second mounting cavity. The driving device includes an insulating sealing plug disposed in the communicating hole. The driving device includes a first electrical connector, one end of which is electrically connected to the stator assembly, and the other end of which passes through the insulating sealing plug and is electrically connected to the first circuit board; and / or the driving device includes a second circuit board and a second electrical connector, the second circuit board being disposed in the first mounting cavity, one end of which is electrically connected to the second circuit board, and the other end of which passes through the insulating sealing plug and is electrically connected to the first circuit board.

[0010] In one or more of the above optional embodiments, the mounting part is provided with an annular groove, the first cover is provided with an annular protrusion, the annular protrusion is inserted into the annular groove, and the gap between the annular groove and the annular protrusion is filled with sealant.

[0011] In one or more of the above optional embodiments, the drive device further includes a second cover, which covers the side of the first cover facing away from the second mounting cavity. A third mounting cavity and a communication port are formed between the first cover and the second cover. The communication port connects the third mounting cavity to the outside and is used for a power cord to pass through. The drive device includes a conductive post, which passes through the first cover. One end of the conductive post is electrically connected to the first circuit board, and the other end of the conductive post is located in the third mounting cavity and is used for electrical connection to the power cord.

[0012] In one or more of the above optional embodiments, the first cover is provided with a vent hole, the vent hole is provided with a vent plug, the vent plug closes the vent hole, and the vent plug is used to allow gas to pass through and to prevent external liquid from entering the second mounting cavity.

[0013] According to a second aspect of this application, an electric vehicle is provided, including the aforementioned drive unit. The beneficial effects of this application embodiment are as follows: the housing includes an integrally formed mounting part and a main body part, and the housing is provided with a first air duct that passes through the mounting part. The stator assembly is disposed in the first mounting cavity of the main body part. The drive shaft passes through the first mounting cavity and cooperates with the stator assembly. One end of the drive shaft is connected to a fan. The axial direction of the drive shaft is parallel to the through direction of the first air duct. The other end of the drive shaft is used to connect to an external device. When working, the fan rotates with the drive shaft and drives the airflow to flow along the axial direction of the drive shaft. The airflow flows through the main body part and the first air duct, which can remove the heat of the main body part and the heat transferred from the first circuit board to the mounting part. Compared with the traditional drive device, the drive device provided by this application embodiment has a better heat dissipation effect and a compact overall structure, with the advantages of small size, light weight and low production cost. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0015] Figure 1 A perspective view of a driving device provided in an embodiment of this application; Figure 2 An exploded view of a driving device provided in an embodiment of this application; Figure 3 A schematic diagram of a driving device provided in an embodiment of this application, viewed from the second end of the driving shaft toward the first end of the driving shaft; Figure 4 for Figure 3 Schematic diagram of the cross section at point AA; Figure 5 A partial exploded view of a driving device provided in an embodiment of this application; Figure 6 This is a schematic diagram of the housing of a drive device provided in an embodiment of this application. Detailed Implementation

[0016] To facilitate understanding of this application, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "parallel," "inner," and similar expressions used in this specification are for illustrative purposes only.

[0017] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0018] In the description of this specification, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0020] Please see Figures 1-4 The drive unit 1000 includes a housing 1, a first cover 2, a fan 3, a stator assembly 4, and a drive shaft 5. The housing 1 includes an integrally formed main body 11 and a mounting part 12. The main body 11 has a first mounting cavity f, and the housing 1 has a first air duct a passing through the mounting part 12. The first cover 2 is connected to the mounting part 12, and the first cover 2 and the mounting part 12 together form a second mounting cavity e, in which a first circuit board 6 is disposed. The fan 3 is mounted on the housing 1 along the X-direction of the first air duct a, and is located on one side of the housing 1. The stator assembly 4 is disposed within the first mounting cavity f and is electrically connected to the first circuit board 6. The drive shaft 5 passes through the first mounting cavity f and cooperates with the stator assembly 4. The axial direction of the drive shaft 5 is parallel to the X-direction of the first air duct a. One end of the drive shaft 5 is used to connect to an external device, and the other end of the drive shaft 5 is connected to the fan 3 to drive the fan 3 to drive airflow through the first air duct a.

[0021] The drive device 1000 provided in this application embodiment includes a housing 1 comprising an integrally formed mounting portion 12 and a main body portion 11. The housing 1 has a first air duct a passing through the mounting portion 12. The stator assembly 4 is disposed in the first mounting cavity f of the main body portion 11. The drive shaft 5 passes through the first mounting cavity f and cooperates with the stator assembly 4. One end of the drive shaft 5 is connected to a fan 3. The axial direction of the drive shaft 5 is parallel to the through direction X of the first air duct a. The other end of the drive shaft 5 is used to connect to an external device. During operation, the fan 3 rotates with the drive shaft 5, thereby driving the airflow to flow along the axial direction of the drive shaft 5. The airflow flows through the main body portion 11 and the first air duct a, which can remove the heat from the main body portion 11 and the heat transferred from the first circuit board 6 to the mounting portion 12. Compared with traditional drive devices, the drive device 1000 provided in this application embodiment has a better heat dissipation effect, a compact overall structure, and the advantages of small size, light weight, and low production cost.

[0022] In some embodiments, along the through direction X of the first air duct a, the first air duct a includes an air inlet a1 and an air outlet a2 disposed opposite to each other. The air inlet a1 includes a first inlet a11 and a second inlet a12 disposed at intervals. The cross-sectional area of ​​the air outlet a2 is greater than the sum of the cross-sectional areas of the first inlet a11 and the second inlet a12. The cross-sectional area of ​​the air outlet a2 is the area of ​​the cross-section perpendicular to the through direction X of the first air duct a. The cross-sectional area of ​​the first inlet a11 is the area of ​​the cross-section perpendicular to the through direction X of the first air duct a. The cross-sectional area of ​​the second inlet a12 is the area of ​​the cross-section perpendicular to the through direction X of the first air duct a. The cross-sectional area of ​​the air outlet a2 is larger than the sum of the cross-sectional areas of the first inlet a11 and the second inlet a12. The larger cross-sectional area of ​​the air outlet a2 allows the airflow to be discharged more smoothly, reduces the airflow velocity when flowing through the air outlet a2, reduces dynamic pressure loss, and makes the energy of the fan 3 more efficiently converted into negative pressure on the side of the air inlet a1. This helps to stabilize the airflow direction and reduce backflow, as well as reduce wind noise at the air outlet a2.

[0023] In some embodiments, the outer wall of the main body 11 is provided with a plurality of heat dissipation fins 111, which extend along the through direction X of the first air duct a. A second air duct b is formed between adjacent heat dissipation fins 111, and the fan 3 is also used to drive airflow through the second air duct b. The provision of a plurality of heat dissipation fins 111 on the outer wall of the main body 11 is beneficial to improving the heat dissipation efficiency of the main body 11. The formation of a second air duct b between adjacent heat dissipation fins 111 and the fan 3 driving airflow through the second air duct b are beneficial to further improving the heat dissipation effect of the main body 11.

[0024] In some embodiments, the mounting portion 12 is disposed on one side of the main body portion 11 along the first direction Y. The main body portion 11 includes a bottom surface opposite to the mounting portion 12 along the first direction Y, and a first side surface and a second side surface opposite to each other along the second direction Z. The bottom surface is provided with a plurality of heat dissipation fins 111 arranged along the second direction Z, and both the first side surface and the second side surface are provided with a plurality of heat dissipation fins 111 arranged along the first direction Y. The first direction Y, the second direction Z, and the through direction X of the first air duct a are all perpendicular to each other.

[0025] In some embodiments, the drive device 1000 further includes a fan cover 7, which is disposed on the housing 1. The fan cover 7 and the housing 1 enclose a heat dissipation cavity c. The fan 3 is disposed in the heat dissipation cavity c. The fan cover 7 is provided with a ventilation hole 711, which connects the heat dissipation cavity c to the outside. Along the through direction X of the first air duct a, the heat dissipation cavity c is connected to the first air duct a and the second air duct b.

[0026] In some embodiments, during operation, the fan 3 rotates together with the drive shaft 5. The fan 3 drives the outside air to enter the heat dissipation cavity c through the ventilation hole 711, and then enters the first air duct a and the second air duct b through the connection between the heat dissipation cavity c and the first air duct a and the second air duct b, and then flows through the first air duct a and the second air duct b.

[0027] In some embodiments, the main body 11 includes a first end 11a and a second end 11b disposed opposite to each other along the through direction X of the first air duct a. The first end of the drive shaft 5 extends out of the housing 1 via the first end 11a for connection with an external device, and the second end of the drive shaft 5 extends out of the housing 1 via the second end 11b for connection with the fan 3.

[0028] In some embodiments, the fan cover 7 includes a front end plate 71 and a side end plate 72. Along the through direction X of the first air duct a, the front end plate 71 is located on the side of the fan 3 facing away from the main body 11. One end of the side end plate 72 is connected to the front end plate 71, and the other end of the side end plate 72 is connected to the second end 11b. A ventilation hole 711 is located on the front end plate 71.

[0029] In some embodiments, the side panel 72 defines an opening d at one end away from the front end panel 71. Along the direction from the second end of the drive shaft 5 to the first end of the drive shaft 5, the opening d is sleeved on the second end 11b and communicates with the first air duct a and the second air duct b.

[0030] In some embodiments, along the second direction Z, the outer side wall of the second end 11b is provided with a mounting protrusion 112, the mounting protrusion 112 is provided with a first threaded hole 1121, the side plate 72 is provided with a first mounting hole 721, the first threaded hole 1121 is aligned with the first mounting hole 721, and the drive device 1000 further includes a first mounting bolt 722, which passes through the first mounting hole 721 and is screwed and fixed to the first threaded hole 1121.

[0031] Please see Figure 2 , Figure 4 , Figure 5 and Figure 6 In some embodiments, the mounting portion 12 includes a mounting plate 121, which is disposed at a distance from the main body portion 11 along a direction perpendicular to the through direction X of the first air duct a. The mounting plate 121 includes a first surface 121a and a second surface 121b disposed opposite to each other. The second surface 121b is disposed facing the main body portion 11, and the first air duct a is defined between the second surface 121b and the main body portion 11. A first cover 2 is disposed on the side of the mounting plate 121 facing away from the second surface 121b. A first circuit board 6 is disposed opposite to the first surface 121a, and a power device is disposed on the side of the first circuit board 6 facing the first surface 121a. The power device is attached to the first surface 121a. By attaching the power device to the first surface 121a and forming a first air duct a between the second surface 121b opposite to the first surface 121a and the main body 11, when the drive device 1000 is working, the heat generated by the power device can be transferred to the second surface 121b through the first surface 121a. The airflow driven by the fan 3 through the first air duct a can carry away the heat from the second surface 121b relatively quickly, thereby improving the heat dissipation effect of the power device.

[0032] In some embodiments, the mounting portion 12 includes a connecting portion 122, which includes a first upright plate 1221 and a second upright plate 1222. The first upright plate 1221 and the second upright plate 1222 are arranged opposite to each other along a second direction Z. One end of the first upright plate 1221 is connected to the mounting plate 121, and the other end of the first upright plate 1221 is connected to the main body portion 11. One end of the second upright plate 1222 is connected to the mounting plate 121, and the other end of the second upright plate 1222 is connected to the main body portion 11.

[0033] In some embodiments, the mounting portion 12 includes a connecting post 123, which is connected between the mounting plate 121 and the main body portion 11. The housing 1 is provided with a connecting hole g that sequentially passes through the mounting plate 121, the connecting post 123 and the side wall of the main body portion 11 facing the mounting plate 121. The connecting hole g connects the first mounting cavity f and the second mounting cavity e.

[0034] In some embodiments, the drive device 1000 includes an insulating sealing plug 8 disposed in the communicating hole g.

[0035] In some embodiments, one end of the connecting post 123 is connected to the second surface 121b, and the other end of the connecting post 123 is connected to the surface of the main body 11 facing the second surface 121b. Along the direction from the first surface 121a to the second surface 121b, the connecting hole g passes through the mounting plate 121, the connecting post 123 and the outer wall of the main body 11.

[0036] In some embodiments, the first inlet a11 and the second inlet a12 are symmetrically arranged on both sides of the connecting column 123 along the second direction Z.

[0037] Please see Figure 4 In some embodiments, the drive device 1000 includes a first electrical connector 61, one end of which is electrically connected to the stator assembly 4, and the other end of which passes through the insulating sealing plug 8 and is electrically connected to the first circuit board 6.

[0038] In some embodiments, the drive device 1000 includes a second circuit board 9 and a second electrical connector 62. The second circuit board 9 is disposed in the first mounting cavity f. One end of the second electrical connector 62 is electrically connected to the second circuit board 9, and the other end of the second electrical connector 62 passes through the insulating sealing plug 8 and is electrically connected to the first circuit board 6.

[0039] In some embodiments, the first electrical connector 61 is a conductor, and the number of conductors is three. The three conductors serve as the power supply lines for the U-phase, V-phase, and W-phase of the stator assembly, respectively.

[0040] In some embodiments, the drive device 1000 includes a rotor, a drive shaft 5 passes through the stator assembly 4, the rotor and the drive shaft 5 are partially connected through the stator assembly 4, the rotor can rotate relative to the stator assembly 4 and thus drive the drive shaft 5 to rotate, a first circuit board 6 is used to control the operation of the rotor and the stator assembly 4, a second circuit board 9 is provided with a Hall element, the second circuit board 9 is used to detect the rotor position and speed, and a second electrical connector 62 is a connector, the connector includes a base 621 and a plurality of pins 622, the base 621 is disposed on the second circuit board 9, one end of the pins 622 is connected to the base 621, and the other end of the pins 622 passes through the insulating sealing plug 8 and is connected to the first circuit board 6.

[0041] In some embodiments, the insulating sealing plug 8 is made of, but is not limited to, a plastic material.

[0042] Please see Figure 2 and Figure 5In some embodiments, the mounting part 12 is provided with an annular groove 1211a, and the first cover 2 is provided with an annular protrusion 21. The annular protrusion 21 is inserted into the annular groove 1211a, and the gap between the annular groove 1211a and the annular protrusion 21 is filled with sealant (not shown). The sealant is used to seal the gap between the inner wall of the annular groove 1211a and the annular protrusion 21.

[0043] In some embodiments, a side wall 1211 protrudes from the periphery of the mounting plate 121 along the direction from the second surface 121b to the first surface 121a, and an annular groove 1211a is provided at one end of the side wall 1211 away from the mounting plate 121.

[0044] In some embodiments, the first cover 2 is provided with a second mounting hole 22, and the side wall 1211 is provided with a second threaded hole 1211b at one end away from the mounting plate 121. The drive device 1000 includes a second mounting bolt 23, which passes through the second mounting hole 22 and is screwed to the second threaded hole 1211b.

[0045] Please see Figure 1 , Figure 2 and Figure 4 In some embodiments, the drive device 1000 further includes a second cover 10, which covers the side of the first cover 2 facing away from the second mounting cavity e. A third mounting cavity h and a communication port i are formed between the second cover 10 and the first cover 2. The communication port i connects the third mounting cavity h to the outside and is used for a power cord to pass through. The drive device 1000 includes a conductive post 20, which passes through the first cover 2. One end of the conductive post 20 is electrically connected to the first circuit board 6, and the other end of the conductive post 20 is located in the third mounting cavity h. The end of the conductive post 20 located in the third mounting cavity h is used to connect to the power cord.

[0046] In some embodiments, the second cover 10 is screwed to the first cover 2 in the direction of the mounting part 12 toward the main body part 11.

[0047] In some embodiments, the first cover 2 is provided with a vent (not shown), and the vent is provided with a vent plug (not shown). The vent plug seals the vent and is used to allow gas to pass through while preventing external liquid from entering the first receiving cavity e. By providing the vent plug, while preventing external liquid from entering the first receiving cavity e, the vent plug allows gas to pass through, thereby balancing the air pressure between the first receiving cavity e and the outside. This helps to reduce the problem of excessive air pressure in the first receiving cavity e caused by the heat generated during the operation of the control board, which could lead to sealing failure of the control box, structural deformation, and damage to electronic components.

[0048] In some embodiments, the breather plug is made of a nanofilm.

[0049] Based on the same inventive concept, this application also provides an electric vehicle, including the drive device 1000 in any of the above embodiments.

[0050] In some embodiments, the electric vehicle is a three-wheeled electric vehicle.

[0051] In some embodiments, the electric vehicle includes a vehicle body, an axle, and a transmission device. The axle is disposed on the vehicle body, the transmission device is connected to the axle, and the drive device 1000 is connected to the transmission device through the first end of the drive shaft 5.

[0052] In some embodiments, the transmission device is a gearbox.

[0053] In some embodiments, the electric vehicle includes a power source and a power cord. The power source is located in the vehicle body, one end of the power cord is connected to the power source, and the other end of the power cord passes through the communication port i and is connected to the conductive post 20 in the third mounting cavity h.

[0054] 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. A driving device, characterized in that, include: The housing includes an integrally formed main body and a mounting part, wherein the main body is provided with a first mounting cavity and the housing is provided with a first air duct passing through the mounting part; A first cover is connected to the mounting part, and the first cover and the mounting part enclose a second mounting cavity, and a first circuit board is provided in the second mounting cavity; A fan is installed in the housing and is located on one side of the housing along the through direction of the first air duct. A stator assembly is disposed within the first mounting cavity, and the stator assembly is electrically connected to the first circuit board; A drive shaft passes through the first mounting cavity and cooperates with the stator assembly. The axial direction of the drive shaft is parallel to the through direction of the first air duct. One end of the drive shaft is used to connect to an external device, and the other end of the drive shaft is connected to the fan to drive the fan to drive the airflow through the first air duct.

2. The driving device according to claim 1, characterized in that, Along the through direction of the first air duct, the first air duct includes an air inlet and an air outlet arranged opposite to each other, and the air inlet includes a first inlet and a second inlet arranged at intervals. The cross-sectional area of ​​the air outlet is greater than the sum of the cross-sectional areas of the first inlet and the second inlet.

3. The driving device according to claim 1, characterized in that, The outer wall of the main body is provided with a plurality of heat dissipation fins, which extend along the through direction of the first air duct. A second air duct is formed between adjacent heat dissipation fins, and the fan is also used to drive airflow through the second air duct.

4. The driving device according to claim 3, characterized in that, It also includes a fan cover, which is disposed on the housing. The fan cover and the housing enclose a heat dissipation cavity, and the fan is disposed in the heat dissipation cavity. The fan cover has ventilation holes that connect the heat dissipation cavity to the outside. Along the through direction of the first air duct, the heat dissipation cavity is connected to the first air duct and the second air duct.

5. The driving device according to claim 1, characterized in that, The mounting part includes a mounting plate, which is arranged at intervals relative to the main body in a direction perpendicular to the through direction of the first air duct. The mounting plate includes a first surface and a second surface disposed opposite to each other. The second surface is disposed facing the main body portion, and the second surface and the main body portion define the first air duct. The first cover is disposed on the side of the mounting plate opposite to the second surface. The first circuit board is disposed opposite to the first surface. The side of the first circuit board facing the first surface is provided with power devices, and the power devices are attached to the first surface.

6. The driving device according to claim 5, characterized in that, The mounting part includes a connecting post, which connects the mounting plate and the main body. The housing is provided with a connecting hole that sequentially passes through the mounting plate, the connecting post and the side wall of the main body facing the mounting plate. The connecting hole connects the first mounting cavity and the second mounting cavity. The driving device includes an insulating sealing plug, which is disposed in the connecting hole. The drive device includes a first electrical connector, one end of which is electrically connected to the stator assembly, and the other end of which passes through the insulating sealing plug and is electrically connected to the first circuit board; and / or The drive device includes a second circuit board and a second electrical connector. The second circuit board is disposed in the first mounting cavity. One end of the second electrical connector is electrically connected to the second circuit board, and the other end of the second electrical connector passes through the insulating sealing plug and is electrically connected to the first circuit board.

7. The driving device according to claim 1, characterized in that, The mounting part is provided with an annular groove, and the first cover is provided with an annular protrusion. The annular protrusion is inserted into the annular groove, and the gap between the annular groove and the annular protrusion is filled with sealant.

8. The driving device according to claim 1, characterized in that, The drive device further includes a second cover, which covers the side of the first cover facing away from the second mounting cavity. A third mounting cavity and a communication port are formed between the first cover and the second cover. The communication port connects the third mounting cavity to the outside and is used for a power cord to pass through. The driving device includes a conductive post that passes through the first cover. One end of the conductive post is electrically connected to the first circuit board, and the other end of the conductive post is located in the third mounting. The other end of the conductive post is used to electrically connect to the power line.

9. The driving device according to claim 1, characterized in that, The first cover is provided with a vent hole, and the vent hole is provided with a vent plug. The vent plug seals the vent hole and is used to allow gas to pass through and to prevent external liquid from entering the second mounting cavity.

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

Images