Driving device and vehicle

Abstract

The invention provides a driving device and a vehicle, the driving device comprises a motor electric control shell, an end cover shell, a middle shell, a fastener, a motor and a speed reducer, the middle shell is arranged between the motor electric control shell and the end cover shell, and the middle shell abuts against the motor electric control shell and the end cover shell; the fastener penetrates through the end cover shell and the middle shell and is fixedly connected with the motor electric control shell; a motor mounting cavity is formed between the motor electric control shell and the middle shell, and the motor is arranged in the motor mounting cavity; a speed reducer installation cavity is formed between the middle shell and the end cover shell, the speed reducer is arranged in the speed reducer installation cavity and is in transmission connection with the motor, and the middle shell and the end cover shell are fixed to the motor electric control shell through the same fastener, so that the number of the fasteners is reduced, and the cost is reduced. According to the driving device, the structure of the motor electric control shell is reduced, and a structure used for being connected with the arranged fastener on the motor electric control shell is reduced, so that the structure of the driving device is simpler, the space required for mounting the fastener can be reduced, and the overall envelope size of the driving device is further reduced.

Description

Technical Field

[0001] The present invention relates to the field of vehicles, and mainly to a driving device and a vehicle. Background Art

[0002] Conventional drive devices include a motor and electronic control housing, an end cap housing, an intermediate housing, a motor, and a reducer. The end cap housing is secured to the motor and electronic control housing with screws. The intermediate housing is positioned between the end cap housing and the motor and electronic control housing and secured to the motor and electronic control housing with screws. This separates the end cap housing and the motor and electronic control housing into a cavity for mounting the motor and a cavity for mounting the reducer. However, securing the end cap housing and the intermediate housing to the motor and electronic control housing requires a large number of screws, which increases the overall size of the drive device. Summary of the Invention

[0003] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a drive device and a vehicle to solve the problems of the existing drive device having a complex structure and a large overall size.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A drive device includes a motor and electronic control housing, an end cover housing, an intermediate housing, fasteners, a motor, and a reducer. The intermediate housing is disposed between the motor and electronic control housing and the end cover housing, and the intermediate housing abuts against the motor and electronic control housing and the end cover housing. The fasteners sequentially penetrate and connect the end cover housing, the intermediate housing, and the motor and electronic control housing. A motor mounting cavity is formed between the motor and electronic control housing and the intermediate housing, and the motor is disposed within the motor mounting cavity. A reducer mounting cavity is formed between the intermediate housing and the end cover housing, and the reducer is disposed within the reducer mounting cavity and is in transmission connection with the motor. The intermediate housing and the end cover housing are fixed to the motor and electronic control housing using the same fasteners, thereby reducing the number of fasteners and the structure on the motor and electronic control housing for connection with the fasteners, thereby reducing production costs.

[0006] In some embodiments of the present application, a first connecting structure is provided on the circumferential edge of the motor and electronic control housing, a second connecting structure is provided on the circumferential edge of the end cover housing, and a third connecting structure is provided on the circumferential edge of the intermediate housing. The first connecting structure, the second connecting structure, and the second connecting structure are positioned opposite each other, and the fasteners are connected to the first connecting structure, the second connecting structure, and the third connecting structure. The first connecting structure, the second connecting structure, and the second connecting structure are positioned opposite each other, and the fasteners are provided on the circumferential edges of the intermediate housing, the end cover housing, and the motor and electronic control housing, making the structure more compact and facilitating the sealing of the motor mounting cavity and the reducer mounting cavity.

[0007] In some schemes of the present application, the fastener is a screw, the first connecting structure is a threaded hole, the second connecting structure is a first screw through hole, and the third connecting structure is a second screw through hole, and the screw passes through the first screw through hole and the second screw through hole in sequence and is threadedly connected to the threaded hole; the axes of the threaded hole, the first screw through hole and the second screw through hole are parallel to the axis of the motor mounting cavity, so that the end cover shell, the intermediate shell and the motor electronic control shell are coplanar at the connection, that is, the structure of the end cover shell, the intermediate shell and the motor electronic control shell is simplified, and the structure between the end cover shell, the intermediate shell and the motor electronic control shell is more compact.

[0008] In some embodiments of the present application, the intermediate shell includes a first intermediate shell and a second intermediate shell, the end cover shell includes a first end cover shell and a second end cover shell, the fastener includes a first fastener and a second fastener, the first fastener connects the first end cover shell, the first intermediate shell and the first end of the motor and electronic control shell, and the second fastener connects the second end cover shell, the second intermediate shell and the second end of the motor and electronic control shell; the motor mounting cavity includes a first motor mounting cavity and a second motor mounting cavity, the first motor mounting cavity is arranged at the first end of the motor and electronic control shell, and is communicated with the first end face of the motor and electronic control shell, the first intermediate shell covers the open end of the first motor mounting cavity, the second motor mounting cavity is arranged at the second end of the motor and electronic control shell, and is communicated with the second end face of the motor and electronic control shell, and the second intermediate shell covers the open end of the second motor mounting cavity; both the first motor mounting cavity and the second motor mounting cavity are installed The motor is installed, and the motor installed in the first motor mounting cavity is the first motor, and the motor installed in the second motor mounting cavity is the second motor. The first motor and the second motor are coaxially arranged, and the first motor and the second motor are symmetrical; the reducer mounting cavity includes a first reducer mounting cavity and a second reducer mounting cavity, the reducer mounting cavity formed between the first intermediate shell and the first end cover shell is the first reducer mounting cavity, and the reducer mounting cavity formed between the second intermediate shell and the second end cover shell is the second reducer mounting cavity; the reducer is installed in both the first reducer mounting cavity and the second reducer mounting cavity, and the reducer installed in the first reducer mounting cavity is the first reducer, the first reducer is connected to the first motor, the reducer installed in the second reducer mounting cavity is the second reducer, the second reducer is connected to the second motor, and the first reducer and the second reducer are symmetrically arranged.

[0009] In some embodiments of the present application, the first reducer includes a first primary reduction gear set and a first secondary reduction gear set, the first primary reduction gear set is arranged on a side of the first secondary reduction gear set close to the first motor, the first intermediate housing is recessed toward one side of the first motor to form a first cavity for mounting the first primary reduction gear set, the first end cover housing is recessed toward a side away from the first intermediate housing to form a second cavity for mounting the first secondary reduction gear set, the first cavity and the second cavity constitute the first reducer mounting cavity; the second reducer includes a second primary reduction gear set and a second secondary reduction gear set, the The second first-stage reduction gear set is arranged on the side of the second second-stage reduction gear set close to the second motor, and the second intermediate housing is recessed toward the side of the second motor to form a third cavity for installing the second first-stage reduction gear set, and the second end cover housing is recessed toward the side away from the second intermediate housing to form a fourth cavity for installing the second second-stage reduction gear set. The third cavity and the fourth cavity constitute the second reducer installation cavity. Through the first cavity, the second cavity, the third cavity and the fourth cavity, the structure of the drive device is more compact, and the outer surfaces of the first end cover housing and the second end cover housing form a concave-convex structure, which is convenient for matching with the whole vehicle.

[0010] In some solutions of the present application, the motor electronic control housing includes a motor main body, a first connecting part and a second connecting part, one end of the first connecting part is connected to the first end of the motor main body, and the other end protrudes from the circumferential outer surface of the motor mounting cavity, one end of the second connecting part is connected to the second end of the motor main body, and the other end protrudes from the circumferential outer surface of the motor mounting cavity, and is symmetrical with the first connecting part; a controller mounting cavity is formed between the first connecting part and the second connecting part and on one side of the circumference of the motor main body; the drive device also includes an electric drive controller, which is installed in the controller mounting cavity and is electrically connected to the motor. The electric drive controller is arranged between the first connecting part and the second connecting part, and the position of the electric drive controller is close to the first motor and the second motor, thereby making the structure of the drive device more compact.

[0011] In some embodiments of the present application, the drive device further includes a controller housing and a controller cover. The controller housing is arranged between the first connecting part and the second connecting part, and is located on one side of the circumference of the motor main body. The controller cover is fixed on the controller housing and forms the controller installation cavity with the controller housing.

[0012] In some embodiments of the present application, the motor main body, the first connecting part and the second connecting part are integrally formed, and the controller housing is fixed on the first connecting part and the second connecting part; or the controller housing, the motor main body, the first connecting part and the second connecting part are integrally formed.

[0013] In some schemes of the present application, the drive device also includes an oil cooling assembly and a water cooling assembly. The oil cooling assembly includes an oil storage chamber, an oil pump, an oil inlet channel, a heat exchanger, an oil outlet channel, the motor mounting chamber, the reducer mounting chamber and an oil return channel. The oil storage chamber, the oil pump, the oil inlet channel, the heat exchanger, the oil outlet channel, the motor mounting chamber, the reducer mounting chamber and the oil return channel are connected to form a circulation channel. By setting up the oil cooling assembly, cooling and lubrication of the motor and the reducer are achieved; the water cooling assembly includes a water inlet channel, a water outlet channel, the electric drive controller and the heat exchanger. The water inlet channel, the electric drive controller, the water outlet channel and the heat exchanger are connected in sequence for cooling the electric drive controller and the heat exchanger, thereby achieving cooling of the cooling oil.

[0014] In some schemes of the present application, the oil storage chamber is arranged at the bottom of the motor electronic control housing and is located below the motor mounting chamber, so as to facilitate the cooling oil in the motor mounting chamber and the reducer mounting chamber to flow back to the oil storage chamber through the return oil channel, which is beneficial to prevent oil from bubbling in the air gap between the stator and the rotor of the first motor and the second motor during operation.

[0015] In some schemes of the present application, the oil pump is arranged at one end of the oil inlet channel close to the oil storage chamber, shortening the channel length between the oil pump and the oil storage chamber, so that the oil pump has less discharge volume when starting, thereby improving the oil pump power, reducing vibration, reducing the oil pump power consumption and increasing the service life of the oil pump.

[0016] In some schemes of the present application, the oil cooling assembly also includes a suction filter, one end of which is connected to the oil inlet end of the oil pump, and the other end extends to the bottom of the oil storage chamber, so that the suction filter does not suck air when the vehicle is rolling, thereby improving NVH performance and oil pump life. At the same time, it can reduce the amount of lubricating oil added to the electric drive, reduce the oil stirring loss of the reducer, effectively improve efficiency, reduce the amount of lubricating oil used, and reduce weight and cost.

[0017] In some schemes of the present application, the heat exchanger is arranged above the water outlet channel, the water inlet channel is located below the water outlet channel, and the electric drive controller is located between the water inlet channel and the water outlet channel, so that the cooling water flows from bottom to top, which is conducive to reducing the generation of bubbles, reducing the impact on the electric drive controller and the heat exchanger, and reducing vibration.

[0018] In some schemes of the present application, the oil inlet channel, the oil outlet channel, the water inlet channel and the water outlet channel are all arranged between the motor mounting cavity and the controller mounting cavity, shortening the length of the oil inlet channel, the oil outlet channel, the water inlet channel and the water outlet channel, which is beneficial to reducing the channel resistance of the oil cooling assembly and the channel resistance of the water cooling assembly, and reducing the power consumption of the oil pump.

[0019] A vehicle comprises a vehicle body, a wheel end and a driving device, wherein the driving device is fixed on the vehicle body, and the wheel end is drivingly connected to the output end of a reducer of the driving device.

[0020] Beneficial effect: In the drive device of the present application, the intermediate shell and the end cover shell are fixed to the motor and electronic control shell with the same fasteners, which reduces the number of fasteners and the structure on the motor and electronic control shell for connecting with the provided fasteners, making the structure of the drive device simpler and reducing the space required for installing the fasteners, thereby reducing the overall envelope size of the drive device.

[0021] The vehicle of the present application includes the above-mentioned drive device, and the intermediate housing and the end cover housing are fixed to the motor and electronic control housing using the same fasteners, which simplifies the structure, reduces the size, and reduces the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the exploded structure of a driving device according to one embodiment.

[0023] Figure 2 yes Figure 1 The schematic diagram of the top view of the driving device is shown.

[0024] Figure 3 It is a schematic cross-sectional structural diagram of a driving device according to an embodiment.

[0025] Figure 4 yes Figure 3 A schematic left side view of the drive device is shown, wherein the end cover housing and the intermediate housing are removed.

[0026] Figure 5 This is a structural diagram of the motor and electronic control housing from one perspective.

[0027] Figure 6 This is a structural diagram of the motor and electronic control housing from another perspective.

[0028] Figure 7 yes Figure 5 The front view of the motor electronic control housing is shown.

[0029] Figure 8 This is a structural diagram of the motor and electronic control housing from another perspective.

[0030] Figure 9 yes Figure 1 Schematic diagram of the structure after removing the reducer, intermediate housing, end housing and controller cover.

[0031] Figure 10 It is a schematic structural diagram of an oil cooling assembly and a water cooling assembly in one embodiment, and arrows indicate the flow direction of cooling oil or cooling water.

[0032] Explanation of the main component symbols: 1-motor and electronic control housing; 11-motor main body; 111-first through hole; 112-second through hole; 12-first connecting portion; 13-second connecting portion; 14-first connecting structure; 15-cover plate; 21-first end cover housing; 22-second end cover housing; 23-second connecting structure; 31-first intermediate housing; 32-second intermediate housing; 33-third connecting structure; 4-fastener; 41-first fastener; 42-second fastener; 5-motor; 51-first motor; 52-second motor; 61-first reducer; 611-first gear; 612-second gear; 613-third gear; 614-fourth gear; 615-first input shaft; 616-first output shaft; 617-first intermediate shaft; 62-second reducer; 621-fifth gear; 622-sixth gear; 623-seventh gear; 624-eighth gear; 625-second input shaft; 626-second output shaft; 627-second intermediate shaft; 71-electric drive controller; 72-controller housing; 73-controller cover; 74-controller mounting cavity; 75-first electrical connector; 76-second electrical connector; 81-oil storage cavity; 82-oil pump; 821-oil pump mounting cavity; 83-oil inlet channel; 84-heat exchanger; 85-oil outlet channel; 861-first motor mounting cavity; 862-second motor mounting cavity; 871-first reducer mounting cavity; 872-second reducer mounting cavity; 88-oil return channel; 89-suction filter; 91-water inlet channel; 92-water outlet channel. DETAILED DESCRIPTION

[0033] The present invention provides a drive device and a vehicle. To make the objectives, technical solutions, and effects of the present invention more clear and explicit, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only intended to illustrate the present invention and are not intended to limit the scope of protection of the present invention.

[0034] In the description of the present invention, it should be understood that the terms "upper", "lower", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections, or mutual communication; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0036] A vehicle includes a vehicle body, wheel ends and a drive device. The drive device is fixed to the vehicle body, and the wheel ends are drivingly connected to the output shaft of the reducer of the drive device, so that the power of the motor on the drive device is transmitted to the wheel ends through the reducer to drive the vehicle to move.

[0037] See Figure 1-Figure 3 The drive device includes a motor and electronic control housing 1, an end cover housing, an intermediate housing, fasteners 4, a motor 5, and a reducer. The motor and electronic control housing 1, the end cover housing, and the intermediate housing are fixed together by fasteners 4 to form the housing of the drive device. A motor mounting cavity is formed between the motor and electronic control housing 1 and the intermediate housing, and the motor 5 is disposed within the motor mounting cavity. A reducer mounting cavity is formed between the intermediate housing and the end cover housing, and the reducer is disposed within the reducer mounting cavity and is in transmission connection with the motor 5, thereby enabling the installation of the motor 5 and the reducer.

[0038] The intermediate housing is disposed between the motor and electronic control housing 1 and the end cover housing. The intermediate housing abuts against both the motor and electronic control housing 1 and the end cover housing, i.e., the intermediate housing contacts the motor and electronic control housing 1, and the end cover housing contacts the intermediate housing. Fasteners 4 pass through the circumferential edges of the end cover housing and the circumferential edges of the intermediate housing and are fixedly connected to the motor and electronic control housing 1. This allows the use of the same fasteners 4 to simultaneously secure the end cover housing and the intermediate housing to the motor and electronic control housing 1, thereby reducing the number of fasteners 4 and the number of connection structures provided on the motor and electronic control housing 1, thereby reducing production costs. In other words, the motor and electronic control housing 1 does not need to be provided with two sets of connection structures for securing the intermediate housing and the end cover housing, but only needs to be provided with a single set of connection structures for securing the end cover housing. The fasteners 4 used to secure the end cover housing are also used to connect the end cover housing and the intermediate housing, thereby achieving a single set of fasteners 4 that simultaneously secures the intermediate housing and the end cover housing to the motor and electronic control housing 1.

[0039] At the circumferential edge of the intermediate housing, one end face of the intermediate housing is in contact with the motor and electronic control housing 1, and the other end face is in contact with the end cover housing, that is, the circumferential edge of the motor and electronic control housing 1, the circumferential edge of the intermediate housing and the circumferential edge of the end cover housing are directly opposite, so that the fastener 4 can be set at the edge of the motor and electronic control housing 1 and connected at the circumferential edge of the end cover housing and the circumferential edge of the intermediate housing at the same time.

[0040] In detail, with the axial direction of the motor 5 as the Y direction, the Y direction as the width direction of the vehicle, the end cover shell, the intermediate shell and the motor electronic control shell 1 are arranged in sequence in the Y direction, and the end cover shell, the intermediate shell and the motor electronic control shell 1 have the same circumferential dimensions (that is, the projections of the end cover shell, the intermediate shell and the motor electronic control shell 1 in the Y direction coincide), the fasteners 4 are connected at the circumferential edge of the end cover shell, the circumferential edge of the intermediate shell and the circumferential edge of the motor electronic control shell 1, and a motor mounting cavity is formed between the middle part of the intermediate shell and the motor electronic control shell 1, and a reducer mounting cavity is formed between the middle part of the end cover shell and the intermediate shell, which makes the structure compact and facilitates the sealing of the motor mounting cavity and the reducer mounting cavity, and reduces the number of fasteners 4, making it more convenient to fix the end cover shell and the intermediate shell.

[0041] In one embodiment, a first connecting structure 14 is provided on the motor and electronic control housing 1, a second connecting structure 23 is provided on the end cover housing, and a third connecting structure 33 is provided on the intermediate housing. The fastener 4 is arranged in cooperation with the first connecting structure 14, the second connecting structure 23 and the third connecting structure 33. The second connecting structure 23, the third connecting structure 33 and the first connecting structure 14 are positioned opposite each other. The fastener 4 is connected to the second connecting structure 23, the third connecting structure 33 and the first connecting structure 14, so that the end cover housing and the intermediate housing are fixedly connected to the motor and electronic control housing 1 through the fastener 4.

[0042] exist Figure 3 In the embodiment shown, the fastener 4 is a screw, the first connecting structure 14 is a threaded hole, the second connecting structure 23 is a first screw through hole, and the third connecting structure 33 is a second screw through hole. The screw passes through the first screw through hole and the second screw through hole in sequence and is threadedly connected to the threaded holes, so that the end cover housing and the intermediate housing are fixedly connected to the motor electronic control housing 1 by the same screw.

[0043] The axes of the threaded hole, the first screw hole, and the second screw hole are parallel to the axis of the motor mounting cavity. That is, the axes of the first connecting structure 14, the second connecting structure 23, and the third connecting structure 33 are all arranged along the Y direction. This makes the end cover housing, the intermediate housing, and the motor and electronic control housing 1 coplanar at the connection point, thereby making the structure of the end cover housing, the intermediate housing, and the motor and electronic control housing 1 more compact. Moreover, the axis of the first connecting structure 14 is along the axial direction of the motor 5. The motor and electronic control housing 1 has a large width in the axial direction of the motor 5, which facilitates the arrangement of a first connecting structure 14 of greater depth. The end surfaces of the end cover housing, the intermediate housing, and the motor and electronic control housing 1 in the Y direction all have flat surfaces, which facilitates the positioning and processing of the first connecting structure 14, the second connecting structure 23, and the third connecting structure 33, reducing production costs.

[0044] In the above description, the circumferential edges of the three shells, namely the end cover shell, the intermediate shell and the motor and electronic control shell, are coplanar, which can also reduce the radial envelope size of the electric drive device. That is, when the three shells are coplanar and installed, the screws (i.e., fasteners 4) only take up one circle of space. If the three shells are not coplanar, which is equivalent to staggered installation, then the intermediate shell and the motor and electronic control shell require one circle of screws, and the end cover shell and the motor and electronic control shell also require one circle of screws, i.e., the size of one more circle of screws. The installation width of one circle of screws is 20mm-24mm. Therefore, the present application reduces the space required for installing the fasteners 4 by arranging the second connecting structure 23, the third connecting structure 33 and the first connecting structure 14 in opposite positions, and the fasteners 4 (screws) can be connected to the second connecting structure 23, the third connecting structure 33 and the first connecting structure 14 at the same time, thereby making the overall size of the drive device smaller.

[0045] In other embodiments, the fastener 4 may be a connecting member such as a rivet.

[0046] See Figure 4 There are multiple fasteners 4, and the multiple fasteners 4 are distributed at the circumferential edge of the motor and electronic control housing 1. The axes of the multiple fasteners 4 are arranged in parallel. The number of the first connecting structure 14, the second connecting structure 23 and the third connecting structure 33 corresponds to the number of the fasteners 4, and the positions are aligned one by one.

[0047] In other embodiments, the second connecting structure 23 is perpendicular to the circumferential outer surface of the end cover housing, the third connecting structure 33 is perpendicular to the circumferential outer surface of the intermediate housing, and the first connecting structure 14 is perpendicular to the circumferential outer surface of the motor and electronic control housing 1. The fastener 4 passes through the second connecting structure 23 and the third connecting structure 33 along the radial direction of the motor 5 and is connected to the first connecting structure 14, that is, the axis of the fastener 4 is perpendicular to the Y direction.

[0048] See Figure 1-Figure 3The intermediate housing includes a first intermediate housing 31 and a second intermediate housing 32, and the end cover housing includes a first end cover housing 21 and a second end cover housing 22. The first end cover housing 21, the first intermediate housing 31, the motor and electronic control housing 1, the second intermediate housing 32, and the second end cover housing 22 are arranged sequentially in the Y direction. The fastener 4 includes a first fastener 41 and a second fastener 42. The first fastener 41 passes through the first end cover housing 21 and the first intermediate housing 31 and is fixedly connected to the first end of the motor and electronic control housing 1. The second fastener 42 passes through the second end cover housing 22 and the second intermediate housing 32 and is fixedly connected to the second end of the motor and electronic control housing 1. In other words, end cover housings and intermediate housings are provided at both ends of the motor and electronic control housing 1, and the end cover housings and intermediate housings at each end of the motor and electronic control housing 1 are fixedly connected to the motor and electronic control housing 1 via fasteners 4.

[0049] Among them, a motor installation cavity is formed between the first intermediate housing 31 and the motor and electronic control housing 1, and between the second intermediate housing 32 and the motor and electronic control housing 1, and a motor 5 is installed in both motor installation cavities, and a reducer installation cavity is formed between the first intermediate housing 31 and the first end cover housing 21, and between the second intermediate housing 32 and the second end cover housing 22, and a reducer is installed in both reducer installation cavities.

[0050] The motor mounting cavity formed between the first intermediate housing 31 and the motor and electronic control housing 1 is the first motor mounting cavity 861. The motor 5 mounted in the first motor mounting cavity 861 is the first motor 51. The reducer mounting cavity formed between the first intermediate housing 31 and the first end cover housing 21 is the first reducer mounting cavity 871. The reducer mounted in the first reducer mounting cavity 871 is the first reducer 61, which is connected to the first motor 51. The motor mounting cavity formed between the second intermediate housing 32 and the motor and electronic control housing 1 is the second motor mounting cavity 862. The motor 5 mounted in the second motor mounting cavity 862 is the second motor 52. The reducer mounting cavity formed between the second intermediate housing 32 and the second end cover housing 22 is the second reducer 62 mounting cavity. The reducer mounted in the second reducer 62 mounting cavity is the second reducer 62, which is connected to the second motor 52.

[0051] In detail, the first reducer 61 includes a first primary reduction gear set and a first secondary reduction gear set. The first primary reduction gear set is arranged on the side of the first secondary reduction gear set close to the first motor 51. The first intermediate housing 31 is recessed toward the side of the first motor 51 to form a first cavity for mounting the first primary reduction gear set. The first end cover housing 21 is recessed toward the side away from the first intermediate housing 31 to form a second cavity for mounting the first secondary reduction gear set. The first cavity and the second cavity constitute the first reducer mounting cavity 871. The first end cover housing 21 and the first intermediate housing 31 both adopt a structure that envelops the first reducer 61, making the overall structure more compact. In addition, the first end cover housing 21 forms a concave-convex structure at the first primary reduction gear set and the first secondary reduction gear set, which facilitates coordination with the entire vehicle.

[0052] The second reducer 62 includes a second primary reduction gear set and a second secondary reduction gear set. The second primary reduction gear set is arranged on the side of the second secondary reduction gear set close to the second motor 52. The second intermediate housing 32 is recessed toward the side of the second motor 52 to form a third cavity for mounting the second primary reduction gear set. The second end cover housing 22 is recessed toward the side away from the second intermediate housing 32 to form a fourth cavity for mounting the second secondary reduction gear set. The third cavity and the fourth cavity constitute the mounting cavity of the second reducer 62. The second end cover housing 22 and the second intermediate housing 32 both adopt a structure that envelops the second reducer 62, making the overall structure more compact. In addition, the second end cover housing 22 forms a concave-convex structure at the second primary reduction gear set and the second secondary reduction gear set, which facilitates coordination with the vehicle.

[0053] exist Figure 3In the illustrated embodiment, the first intermediate housing 31, the first end cover housing 21, and the first end of the motor and electronic control housing 1 are coplanar. The central portion of the first intermediate housing 31 surrounds the side of the first primary reduction gear set near the first motor 51, forming a first cavity on the side of the first intermediate housing 31 near the first primary reduction gear set. The central portion of the first end cover housing 21 surrounds the outside of the first secondary reduction gear set, forming a second cavity on the side of the first end cover housing 21 near the first secondary reduction gear set. The second intermediate housing 32, the second end cover housing 22, and the second end of the motor and electronic control housing 1 are coplanar. The central portion of the second intermediate housing 32 surrounds the side of the second primary reduction gear set near the second motor 52, forming a third cavity on the side of the second intermediate housing 32 near the second primary reduction gear set. The central portion of the second end cover housing 22 surrounds the outside of the second secondary reduction gear set, forming a fourth cavity on the side of the second end cover housing 22 near the second secondary reduction gear set. By arranging the above-mentioned first intermediate shell 31, first end cover shell 21, second intermediate shell 32 and second end cover shell 22, a larger space can be formed between the first intermediate shell 31 and the second intermediate shell 32 at the end away from the motor 5, that is, a larger space for installing the electric drive controller 71 (such as the controller installation cavity 74 described below) is formed, and the size between the first end cover shell 21 and the second end cover shell 22 at the end close to the motor 5 is smaller to avoid interference with the longitudinal beams on both sides of the vehicle.

[0054] In detail, the first reduction gear assembly includes a first gear 611, a second gear 612, a third gear 613, a fourth gear 614, a first input shaft 615, a first output shaft 616, and a first intermediate shaft 617. The first input shaft 615, the first output shaft 616, and the first intermediate shaft 617 are arranged parallel to the output shaft of the first motor 51. Both ends of the first input shaft 615 are rotatably connected to the first intermediate housing 31 and the first end cover housing 21, respectively. The end of the first input shaft 615 connected to the first intermediate housing 31 passes through the first intermediate housing 31 and is connected to the output shaft of the first motor 51. The first gear 611 is fixed to the first input shaft 615. Both ends of the first intermediate shaft 617 are rotatably connected to the first intermediate housing 31 and the first end cover housing 21, respectively. The second gear 612 and the third gear 613 are both fixed to the first intermediate shaft 617. Both ends of the first output shaft 616 are rotatably connected to the first intermediate housing 31 and the first end cover housing 21, respectively. The first end cover shell 21 is rotatably connected, and the end of the first output shaft 616 connected to the first end cover shell 21 passes through the first end cover shell 21 and is connected to the wheel end of the vehicle, and the fourth gear 614 is fixed on the first output shaft 616, the first gear 611 and the second gear 612 are coplanar and meshed, and the fourth gear 614 and the third gear 613 are meshed and coplanar, so that the power of the first motor 51 can be transmitted to the wheel end through the first gear 611, the second gear 612, the first intermediate shaft 617, the third gear 613, the fourth gear 614 and the first output shaft 616 in sequence.

[0055] The diameter of the first gear 611 is smaller than that of the second gear 612, so that the power of the first motor 51 is reduced when it is transmitted to the first intermediate shaft 617 through the first gear 611 and the second gear 612. That is, the first primary reduction gear set of the first reduction assembly is formed between the first gear 611 and the second gear 612. The diameter of the third gear 613 is smaller than that of the fourth gear 614, so that the power of the first motor 51 is also reduced when it is transmitted to the first output shaft 616 through the third gear 613 and the fourth gear 614. That is, the first secondary reduction gear set of the first reduction assembly is formed between the third gear 613 and the fourth gear 614. Therefore, the first reduction assembly forms a reducer with two-stage reduction.

[0056] See Figure 4 In a preferred embodiment, the first output shaft 616 and the first intermediate shaft 617 are arranged on the same side of the first input shaft 615, and the triangle formed by the lines connecting the first input shaft 615, the first output shaft 616, and the first intermediate shaft 617 with the first input shaft 615, the first output shaft 616, and the first intermediate shaft 617 as vertices is an acute triangle, thereby reducing the size of the drive device in the X direction.

[0057] exist Figure 4In the illustrated embodiment, the first intermediate shaft 617 is located below the first output shaft 616, so that the lowest position of the second gear 612 and the lowest position of the fourth gear 614 are on the same horizontal plane or close to each other, making the overall structure of the drive device more compact.

[0058] Similarly, the second reduction assembly includes a fifth gear 621, a sixth gear 622, a seventh gear 623, an eighth gear 624, a second input shaft 625, a second output shaft 626, and a second intermediate shaft 627. The second input shaft 625, the second output shaft 626, and the second intermediate shaft 627 are arranged parallel to the output shaft of the second motor 52. Both ends of the second input shaft 625 are rotatably connected to the second intermediate housing 32 and the second end cover housing 22, respectively. The end of the second input shaft 625 connected to the second intermediate housing 32 passes through the second intermediate housing 32 and is connected to the output shaft of the second motor 52. The fifth gear 621 is fixedly connected to the second input shaft 625. Both ends of the second intermediate shaft 627 are rotatably connected to the second intermediate housing 32 and the second end cover housing 22, respectively. The sixth gear 622 and the seventh gear 623 are both fixed to the second intermediate shaft 627. Both ends of the second output shaft 626 are rotatably connected to the second intermediate housing 32 and the second end cover housing 22, respectively. It is rotatably connected to the second end cover shell 22, and the end of the second output shaft 626 connected to the second end cover shell 22 passes through the second end cover shell 22 and is connected to the wheel end of the vehicle, the eighth gear 624 is fixed on the second output shaft 626, the sixth gear 622 is meshed with the fifth gear 621 and is coplanar, the eighth gear 624 is coplanar with the seventh gear 623 and is meshed, so that the power of the second motor 52 is transmitted to the second wheel end through the fifth gear 621, the sixth gear 622, the second intermediate shaft 627, the seventh gear 623, the eighth gear 624, and the second output shaft 626 in sequence.

[0059] The diameter of the fifth gear 621 is smaller than that of the sixth gear 622, so that the power of the second motor 52 is reduced when it is transmitted to the second intermediate shaft 627 via the fifth and sixth gears 621, 622. In other words, the second primary reduction gear set of the second reduction assembly is formed between the fifth and sixth gears 621, 622. The diameter of the seventh gear 623 is smaller than that of the eighth gear 624. The power of the second motor 52 is also reduced when it is transmitted to the second output shaft 626 via the seventh and eighth gears 623, 624. The second secondary reduction gear set of the second reduction assembly is formed between the seventh and eighth gears 623, 624. Thus, the second reduction assembly forms a reducer with two reduction stages.

[0060] See Figure 4In a preferred embodiment, the second output shaft 626 and the second intermediate shaft 627 are arranged on the same side of the second input shaft 625, and the triangle formed by the lines connecting the second input shaft 625, the second output shaft 626, and the second intermediate shaft 627 with the second input shaft 625, the second output shaft 626, and the second intermediate shaft 627 as vertices is an obtuse triangle, thereby reducing the size of the drive device in the X direction.

[0061] exist Figure 4 In the illustrated embodiment, the second intermediate shaft 627 is located below the second output shaft 626, so that the lowest position of the sixth gear 622 is on the same horizontal plane or close to the lowest position of the eighth gear 624, making the overall structure of the drive device more compact.

[0062] In the above, the first gear 611, the second gear 612, the third gear 613, the fourth gear 614, the first output shaft 616 and the first intermediate shaft 617 correspond one to one with the fifth gear 621, the sixth gear 622, the seventh gear 623, the eighth gear 624, the second output shaft 626 and the second intermediate shaft 627 in the Y direction, so that the first reduction assembly and the second reduction assembly form a symmetrical structure.

[0063] The first motor mounting cavity 861 and the second motor mounting cavity 862 are both disposed in the motor and electronic control housing 1, with the first motor mounting cavity 861 communicating with the first end face of the motor and electronic control housing 1. The first intermediate housing 31 covers the open end of the first motor mounting cavity 861, while the second motor mounting cavity 862 communicates with the second end face of the motor and electronic control housing 1. The second intermediate housing 32 covers the open end of the second motor mounting cavity 862. In other words, the first intermediate housing 31 separates the space between the middle portion of the first end cover housing 21 and the motor and electronic control housing 1 into the first motor mounting cavity 861 and the first reducer mounting cavity 871, while the second intermediate housing 32 separates the space between the middle portion of the second end cover housing 22 and the motor and electronic control housing 1 into the second motor mounting cavity 862 and the second reducer 62 mounting cavity.

[0064] exist Figure 1 and Figure 3 In the embodiment shown, the first end of the motor and electronic control housing 1 and the second end of the motor and electronic control housing 1 form a symmetrical structure (that is, the first motor mounting cavity 861 and the second motor mounting cavity 862 also form a symmetrical structure, and the two are coaxially arranged), the first intermediate housing 31 and the second intermediate housing 32 are symmetrical, the first end cover housing 21 and the second end cover housing 22 are symmetrical, the first motor 51 and the second motor 52 are symmetrical, and the two are coaxially arranged, and the first reducer 61 and the second reducer 62 are symmetrical, so that the overall structure of the drive device is simpler.

[0065] In one embodiment, one wheel end of the vehicle is connected to the output end of the first reducer 61 (i.e., the first output shaft 616), and the other wheel end is connected to the output end of the second reducer 62 (i.e., the second output shaft 626), so that the two wheel ends of the vehicle are driven by the first motor 51 and the second motor 52 respectively, forming a distributed drive structure.

[0066] In another embodiment, the first motor 51 and the second motor 52 are simultaneously connected to the two wheel ends. For example, the two wheel ends of the vehicle are respectively connected to the two output half shafts of the differential. The first motor 51 is connected to the differential through the first reducer 61, and the second motor 52 is connected to the differential through the second reducer 62, so that one or both of the first motor 51 and the second motor 52 simultaneously drive the two wheel ends to rotate, forming a dual-motor 5 electric drive device.

[0067] In other embodiments, the electric drive system may be supplemented with an engine to form a range-extended power unit or a hybrid power unit. A range-extended power unit refers to a power unit in which the engine drives one of the motors 5 to generate electricity, while the other motor 5 drives the two wheels. A hybrid power unit refers to a power unit in which the engine, one of the motors 5, or both of the motors 5 can jointly output power to drive the two wheels.

[0068] See Figure 4-Figure 8 In one embodiment, the motor and electronic control housing 1 includes a motor body 11, a first connecting portion 12, and a second connecting portion 13. One end of the first connecting portion 12 is connected to the first end of the motor body 11, and the other end protrudes from the circumferential outer surface of the motor mounting cavity. One end of the second connecting portion 13 is connected to the second end of the motor body 11, and the other end protrudes from the circumferential outer surface of the motor mounting cavity. The second connecting portion 13 is symmetrical with the first connecting portion 12, so that the motor body 11, the first connecting portion 12, and the second connecting portion 13 form a U-shape. The first connecting portion 12 and the second connecting portion 13 both extend along the X-direction, which is the longitudinal direction of the vehicle. A controller mounting cavity 74 is formed between the first connecting portion 12 and the second connecting portion 13 and on one side of the circumferential direction of the motor body 11. The drive device also includes an electric drive controller 71, which is electrically connected to the first motor 51 and the second motor 52 to control the first motor 51 and the second motor 52. The electric drive controller 71 is installed in the controller installation cavity 74 so that the electric drive controller 71 is located close to the first motor 51 and the second motor 52 , thereby making the structure of the drive device more compact without increasing the height of the electric drive device.

[0069] See Figure 1The drive device further includes a controller housing 72 and a controller cover 73. The controller housing 72 is disposed between the first connecting portion 12 and the second connecting portion 13 and is located on one circumferential side of the motor body 11. The controller cover 73 is fixed to the controller housing 72 and, together with the controller housing 72, forms a controller mounting cavity 74. In other embodiments, the electric drive controller 71 is directly fixed within the controller mounting cavity 74.

[0070] In the above, the first end of the motor main body 11 and the first connecting part 12 form the first end of the motor electronic control housing 1 for connecting to the first end cover housing 21 and the first intermediate housing 31, and the second end of the motor main body 11 and the second connecting part 13 form the second end of the motor electronic control housing 1 for connecting to the second end cover housing 22 and the second intermediate housing 32.

[0071] In one embodiment, the controller housing 72, the motor body 11, the first connecting portion 12, and the second connecting portion 13 are integrally formed, which facilitates production and reduces the space occupied by the controller housing 72, thereby increasing the space available for installing the electric drive controller 71. In other embodiments, the motor body 11, the first connecting portion 12, and the second connecting portion 13 are integrally formed, and the controller housing 72 is fixed to the first connecting portion 12 and the second connecting portion 13. The controller housing 72 can be fixed between the first connecting portion 12 and the second connecting portion 13 by screws, buckles, or other connecting members.

[0072] See Figure 1 and Figure 5-Figure 9 In the above, the electric drive controller 71 is connected to the terminal of the first motor 51 through the first electrical connector 75, and the electric drive controller 71 is connected to the terminal of the second motor 52 through the second electrical connector 76. The first electrical connector 75 is located between the first motor 51 and the electric drive controller 71, and the second electrical connector 76 is located between the second motor 52 and the electric drive controller 71, thereby shortening the total length of the first electrical connector 75 and the second electrical connector 76, reducing costs. Figure 1 In the embodiment shown, the first electrical connector 75 and the second electrical connector 76 are both three-phase copper busbars. In other embodiments, the first electrical connector 75 and the second electrical connector 76 may also be other conductive structures.

[0073] In detail, the outlet end of the first motor 51 is arranged at the open end close to the first motor installation cavity 861 and faces the electric drive controller 71. The motor and electric control housing 1 is provided with a first through hole 111 (at the bottom) for passing the first electrical connector 75 between the outlet end of the first motor 51 and the electric drive controller 71. Figure 7In the embodiment shown, the first through hole 111 is located directly opposite the output terminal of the first motor 51), so that the first electrical connector 75 can pass through the first through hole 111, and the two ends of the first electrical connector 75 are respectively connected to the electric drive controller 71 and the output terminal of the first motor 51, thereby shortening the length of the first electrical connector 75.

[0074] The outlet end of the second motor 52 is arranged near the opening end of the second motor mounting cavity 862 and faces the electric drive controller 71. The motor and electric control housing 1 is provided with a second through hole 112 (at the bottom) for passing the second electrical connector 76 between the outlet end of the second motor 52 and the electric drive controller 71. Figure 7 In the embodiment shown, the second through hole 112 is located directly opposite the output terminal of the second motor 52), so that the second electrical connector 76 can pass through the second through hole 112, and the two ends of the second electrical connector 76 are respectively connected to the electric drive controller 71 and the output terminal of the second motor 52, thereby shortening the length of the second electrical connector 76.

[0075] Among them, the position of the first electrical connector 75 on the electric drive controller 71 is on the side of the electric drive controller 71 close to the output end of the first motor 51, and the position of the second electrical connector 76 on the electric drive controller 71 is on the side of the electric drive controller 71 close to the output end of the second motor 52, so that the length of the first electrical connector 75 and the second electrical connector 76 can be further shortened, thereby reducing costs.

[0076] See Figure 1 、 Figure 6-Figure 8 as well as Figure 10 The drive device also includes an oil cooling assembly, which includes an oil storage chamber 81, an oil pump 82, an oil inlet channel 83, a heat exchanger 84, an oil outlet channel 85, a motor mounting chamber, a reducer mounting chamber and an oil return channel 88. The oil storage chamber 81, the oil pump 82, the oil inlet channel 83, the heat exchanger 84, the oil outlet channel 85, the motor mounting chamber, the reducer mounting chamber and the oil return channel 88 are connected to form a circulation channel.

[0077] Among them, the oil storage chamber 81, oil pump 82, oil inlet channel 83, heat exchanger 84 and oil outlet channel 85 are connected in sequence. The end of the oil outlet channel 85 away from the heat exchanger 84 is connected to the motor mounting chamber and the reducer mounting chamber. One end of the oil return channel 88 is connected to the oil storage chamber 81, and the end of the oil return channel 88 away from the oil storage chamber 81 is connected to the motor mounting chamber and the reducer mounting chamber. Under the action of the oil pump 82, the cooling oil stored in the oil storage chamber 81 flows along the oil inlet channel 83, the heat exchanger 84 and the oil outlet channel 85 to the motor mounting chamber and the reducer mounting chamber, and absorbs the heat generated by the motor 5 and the reducer during operation in the motor mounting chamber and the reducer mounting chamber, and then flows back to the oil storage chamber 81 through the oil return channel 88. The heat in the cooling oil is dissipated at the heat exchanger 84, thereby continuously cooling the motor 5 and the reducer.

[0078] The oil cooling assembly also includes a suction filter 89, one end of which is connected to the oil inlet of the oil pump 82, and the other end extends to the bottom of the oil storage chamber 81. When the oil pump 82 is working, the cooling oil at the bottom of the oil storage chamber 81 is extracted through the suction filter 89, which is beneficial for the suction filter 89 not to suck out air under the vehicle's rolling driving conditions, thereby improving the NVH (noise, vibration and harshness) performance and the life of the oil pump 82. At the same time, it can reduce the amount of lubricating oil added to the electric drive, reduce the oil stirring loss of the reducer, effectively improve efficiency, reduce the amount of lubricating oil used, and reduce weight and cost. In addition, the cooling oil that passes through the motor mounting cavity and the reducer mounting cavity first returns to the oil storage chamber 81 for sedimentation, and then passes through the suction filter 89 and the oil pump 82 in turn to enter the heat exchanger 84, which can effectively prevent the oil pump 82 and the heat exchanger 84 from being blocked.

[0079] In one embodiment, the oil storage chamber 81 is arranged at the bottom of the motor electronic control housing 1, and the oil storage chamber 81 is located below the motor mounting chamber, that is, the oil storage chamber 81 is located at the lowest point of the motor electronic control housing 1, which facilitates the cooling oil in the motor mounting chamber and the reducer mounting chamber to flow back to the oil storage chamber 81 through the oil return channel 88, which is beneficial to prevent oil from bubbling in the air gap between the stator and the rotor of the first motor 51 and the second motor 52 during operation.

[0080] exist Figure 8 In the embodiment shown, the oil storage chamber 81 is a downwardly opening cavity, which facilitates the demolding of the motor and electronic control housing 1 during injection molding. The opening of the oil storage chamber 81 is sealed by providing a cover plate 15 to form a sealed cavity, so that when the oil storage chamber 81 is repaired and cleaned, the impurities inside the oil storage chamber 81 can be removed by removing the cover plate 15, thereby facilitating the cleaning of the oil storage chamber 81.

[0081] The oil pump 82 is arranged at one end of the oil inlet channel 83 close to the oil storage chamber 81, so that the oil pump 82 is installed at a position close to the oil storage chamber 81 of the motor electronic control housing 1, shortening the channel length between the oil pump 82 and the oil storage chamber 81, so that the oil pump 82 discharges less when starting, thereby improving the power of the oil pump 82, reducing vibration, reducing the power consumption of the oil pump 82 and increasing the service life of the oil pump 82.

[0082] An oil pump installation cavity 821 is provided at the lower end of the motor electronic control housing 1. The oil pump installation cavity 821 is connected to the end of the oil inlet channel 83 close to the oil storage cavity 81, so that after the oil pump 82 is installed in the oil pump installation cavity 821, the oil inlet of the oil pump 82 is connected to the oil storage cavity 81, and the oil outlet of the oil pump 82 is connected to the end of the oil inlet channel 83 close to the radiator. Figure 1 In the illustrated embodiment, the oil pump installation cavity 821 is in communication with the side of the motor electronic control housing 1 facing away from the electric drive controller 71 , so that the installation positions of the oil pump 82 and the electric drive controller 71 do not interfere with each other.

[0083] The drive device also includes a water cooling assembly, which includes a water inlet channel 91, a water outlet channel 92, an electric drive controller 71 and a heat exchanger 84. The water inlet channel 91, the electric drive controller 71, the water outlet channel 92 and the heat exchanger 84 are connected in sequence for cooling the electric drive controller 71 and the heat exchanger 84.

[0084] Specifically, the end of the water inlet channel 91 away from the electric drive controller 71 is connected to the cooling water supply device, and the end of the water outlet channel 92 away from the heat exchanger 84 is also connected to the cooling water supply device, so that the cooling water flows out of the cooling water supply device, passes through the water inlet channel 91, the electric drive controller 71, the heat exchanger 84 and the water outlet channel 92 in sequence, and then returns to the cooling water supply device to achieve circulation. Among them, the cooling water cools the electric drive controller 71 when passing through the electric drive controller 71, and cools the cooling oil when passing through the heat exchanger 84 to prevent the oil temperature from being too high. Of course, when the temperature of the cooling water is higher than the temperature of the cooling oil, such as when the vehicle is in the starting stage, the cooling water can also heat the cooling oil, so that the first motor 51 and the second motor 52 quickly reach the optimal operating temperature.

[0085] Heat exchanger 84 is located above water outlet channel 92, that is, above electric drive controller 71. Water inlet channel 91 is located below water outlet channel 92, and electric drive controller 71 is located between water inlet channel 91 and water outlet channel 92. This allows cooling water to flow from bottom to top, which helps reduce the formation of bubbles, reduces the impact on electric drive controller 71 and heat exchanger 84, and reduces vibration. Furthermore, the length of water inlet channel 91 and water outlet channel 92 is shortened, reducing the resistance of the water cooling assembly.

[0086] When cooling oil is sprayed on the first motor 51 and the second motor 52 to cool the first motor 51 and the second motor 52, the outlet end of the oil outlet channel 85 is set at the top of the first motor mounting cavity 861 and the second motor mounting cavity 862, so that the cooling oil is sprayed from top to bottom, which can achieve an excellent cooling and lubrication effect, and shorten the distance between the heat exchanger 84 and the outlet end of the oil outlet channel 85, that is, shorten the length of the oil outlet channel 85, and reduce the resistance of the oil outlet channel 85.

[0087] The oil inlet channel 83, the oil outlet channel 85, the water inlet channel 91 and the water outlet channel 92 are all arranged between the motor mounting cavity and the controller mounting cavity 74, further shortening the length of the oil inlet channel 83, the oil outlet channel 85, the water inlet channel 91 and the water outlet channel 92, which is beneficial to reducing the channel resistance of the oil cooling assembly and the channel resistance of the water cooling assembly, reducing the power consumption of the oil pump 82, and at the same time obtaining a compact electric drive assembly, which is beneficial to the layout of the entire vehicle.

[0088] exist Figure 6 In the illustrated embodiment, the water inlet channel 91 first extends along the X-direction to the bottom of the controller housing 72, and then extends along the Y-direction to the middle of the bottom of the controller housing 72, corresponding to the water inlet end of the cooling passage in the electric drive controller 71. The water outlet channel 92 is located at the top of the controller housing 72, thereby shortening the distance to the heat exchanger 84.

[0089] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention, and all such changes or substitutions should fall within the scope of protection of the present invention.

Claims

1. A driving device, characterized in that: The motor comprises an electronic control housing, an end cover housing, an intermediate housing, fasteners, a motor, and a reducer. The intermediate housing is disposed between the motor electronic control housing and the end cover housing, and the intermediate housing abuts against the motor electronic control housing and the end cover housing. The fasteners are sequentially passed through and connect the end cover housing, the intermediate housing, and the motor electronic control housing. A motor installation cavity is formed between the motor electronic control housing and the intermediate housing, and the motor is arranged in the motor installation cavity; A reducer installation cavity is formed between the intermediate housing and the end cover housing. The reducer is arranged in the reducer installation cavity and is transmission-connected to the motor.

2. The driving device according to claim 1, characterized in that A first connecting structure is provided on the circumferential edge of the motor and electronic control housing, a second connecting structure is provided on the circumferential edge of the end cover housing, and a third connecting structure is provided on the circumferential edge of the intermediate housing. The first connecting structure, the second connecting structure and the second connecting structure are positioned opposite each other, and the fastener is connected to the first connecting structure, the second connecting structure and the third connecting structure.

3. The driving device according to claim 2, characterized in that The fastener is a screw, the first connection structure is a threaded hole, the second connection structure is a first screw through hole, and the third connection structure is a second screw through hole, and the screw passes through the first screw through hole and the second screw through hole in sequence and is threadedly connected to the threaded holes; The axes of the threaded hole, the first screw through hole, and the second screw through hole are parallel to the axis of the motor installation cavity.

4. The driving device according to any one of claims 1 to 3, characterized in that: The intermediate housing includes a first intermediate housing and a second intermediate housing, the end cover housing includes a first end cover housing and a second end cover housing, and the fastener includes a first fastener and a second fastener, the first fastener connects the first end cover housing, the first intermediate housing, and a first end of the motor and electronic control housing, and the second fastener connects the second end cover housing, the second intermediate housing, and a second end of the motor and electronic control housing; The motor installation cavity includes a first motor installation cavity and a second motor installation cavity, the first motor installation cavity is arranged at the first end of the motor electronic control housing and is in communication with the first end face of the motor electronic control housing, the first intermediate housing covers the open end of the first motor installation cavity, the second motor installation cavity is arranged at the second end of the motor electronic control housing and is in communication with the second end face of the motor electronic control housing, and the second intermediate housing covers the open end of the second motor installation cavity; The motors are installed in both the first motor installation cavity and the second motor installation cavity, the motor installed in the first motor installation cavity is a first motor, and the motor installed in the second motor installation cavity is a second motor, the first motor and the second motor are coaxially arranged, and the first motor and the second motor are symmetrical; The reducer installation cavity includes a first reducer installation cavity and a second reducer installation cavity. The reducer installation cavity formed between the first intermediate housing and the first end cover housing is the first reducer installation cavity, and the reducer installation cavity formed between the second intermediate housing and the second end cover housing is the second reducer installation cavity. The reducer is installed in both the first reducer mounting cavity and the second reducer mounting cavity, and the reducer installed in the first reducer mounting cavity is a first reducer, the first reducer is connected to the first motor, and the reducer installed in the second reducer mounting cavity is a second reducer, the second reducer is connected to the second motor, and the first reducer and the second reducer are symmetrically arranged.

5. The driving device according to claim 4, characterized in that The first reducer includes a first primary reduction gear set and a first secondary reduction gear set, the first primary reduction gear set being arranged on a side of the first secondary reduction gear set close to the first motor, the first intermediate housing being recessed toward a side of the first motor to form a first cavity for mounting the first primary reduction gear set, the first end cover housing being recessed toward a side away from the first intermediate housing to form a second cavity for mounting the first secondary reduction gear set, the first cavity and the second cavity constituting a mounting cavity of the first reducer; The second reducer includes a second primary reduction gear set and a second secondary reduction gear set. The second primary reduction gear set is arranged on a side of the second secondary reduction gear set close to the second motor. The second intermediate housing is recessed toward one side of the second motor to form a third cavity for installing the second primary reduction gear set. The second end cover housing is recessed toward the side away from the second intermediate housing to form a fourth cavity for installing the second secondary reduction gear set. The third cavity and the fourth cavity constitute the second reducer installation cavity.

6. The driving device according to claim 1, characterized in that The motor electronic control housing includes a motor main body, a first connecting portion, and a second connecting portion, wherein one end of the first connecting portion is connected to the first end of the motor main body, and the other end protrudes from the circumferential outer surface of the motor installation cavity; one end of the second connecting portion is connected to the second end of the motor main body, and the other end protrudes from the circumferential outer surface of the motor installation cavity, and is symmetrical to the first connecting portion; A controller installation cavity is formed between the first connecting portion and the second connecting portion and on one side of the circumference of the motor main body; The driving device further comprises: The electric drive controller is installed in the controller installation cavity and is electrically connected to the motor.

7. The driving device according to claim 6, characterized in that The driving device further comprises: a controller housing, disposed between the first connecting portion and the second connecting portion and located on one side of the circumference of the motor main body; The controller cover is fixed on the controller housing and forms the controller installation cavity together with the controller housing.

8. The driving device according to claim 7, characterized in that The motor main body, the first connecting part and the second connecting part are integrally formed, and the controller housing is fixed on the first connecting part and the second connecting part; or The controller housing, the motor main body, the first connecting portion, and the second connecting portion are integrally formed.

9. The driving device according to claim 6, characterized in that The driving device further comprises: The oil cooling assembly includes an oil storage chamber, an oil pump, an oil inlet channel, a heat exchanger, an oil outlet channel, the motor mounting chamber, the reducer mounting chamber, and an oil return channel, wherein the oil storage chamber, the oil pump, the oil inlet channel, the heat exchanger, the oil outlet channel, the motor mounting chamber, the reducer mounting chamber, and the oil return channel are connected to form a circulation channel; The water cooling assembly includes a water inlet channel, a water outlet channel, the electric drive controller and the heat exchanger. The water inlet channel, the electric drive controller, the water outlet channel and the heat exchanger are connected in sequence and are used to cool the electric drive controller and the heat exchanger.

10. The driving device according to claim 9, characterized in that The oil storage cavity is arranged at the bottom of the motor electronic control housing and is located below the motor installation cavity.

11. The driving device according to claim 9, characterized in that The oil pump is arranged at one end of the oil inlet channel close to the oil storage chamber.

12. The driving device according to claim 9, characterized in that The oil cooling assembly further includes a suction filter, one end of which is connected to the oil inlet end of the oil pump, and the other end of which extends to the bottom of the oil storage cavity.

13. The driving device according to claim 9, characterized in that The heat exchanger is arranged above the water outlet channel, the water inlet channel is located below the water outlet channel, and the electric drive controller is located between the water inlet channel and the water outlet channel.

14. The driving device according to claim 9, characterized in that The oil inlet channel, the oil outlet channel, the water inlet channel, and the water outlet channel are all arranged between the motor installation cavity and the controller installation cavity.

15. A vehicle, characterized in that: It comprises a vehicle body, a wheel end and a driving device according to any one of claims 1 to 14, wherein the driving device is fixed on the vehicle body, and the wheel end is drivingly connected to the output end of the reducer of the driving device.

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