CN208924047U

CN208924047U - A kind of integrated motor driven systems

Info

Publication number: CN208924047U
Application number: CN201821785127.9U
Authority: CN
Inventors: 徐延东; 潘永健; 陈登峰; 陈雷; 王旭峰; 许佳志
Original assignee: SHANGHAI AUTOMOBILE EORIVE CO Ltd; Shanghai Automobile Eorive Engineering Technology Research Center Co ltd; Shanghai Edrive Co Ltd
Current assignee: SHANGHAI AUTOMOBILE EORIVE CO Ltd; Shanghai Automobile Eorive Engineering Technology Research Center Co ltd; Shanghai Edrive Co Ltd
Priority date: 2018-10-31
Filing date: 2018-10-31
Publication date: 2019-05-31
Anticipated expiration: 2028-10-31

Abstract

The utility model relates to a kind of integrated motor driven systems, including driving motor and the electric machine controller being installed on above driving motor, electric machine controller includes box assembly, case lid component, power module assembly, input module, output precision, high pressure separated time component, XY capacitance component and control panel component, box assembly is installed on above driving motor, power module assembly, input module, output precision, high pressure separated time component, XY capacitance component and control panel component are installed on inside box assembly, case lid component is installed on above box assembly, power module assembly, input module, output precision, XY capacitance component and the electrical connection of control panel component.Compared with prior art, the utility model is applied to integrated form driving motor system, has many advantages, such as that small in size, light weight and cost is low, assembly technology is simple, sealing performance is reliable and excellent radiation performance.

Description

A kind of integrated motor driven systems

Technical field

The utility model relates to electric automobile driving controller fields, more particularly, to a kind of integrated motor driven systems.

Background technique

With the gradually development of new-energy automobile product and maturation, the space of automotive interior is more and more compacter, lightweight, small It is type, integrated and drop this and require higher and higher, important spare part of the electric machine control system as new-energy automobile, it is traditional Driving motor and electric machine controller separate structure have been unable to meet present development of automobile demand, and if by driving motor and Electric machine controller integrates, and can reduce electric machine control system in the occupancy volume of automotive interior, by removing tradition point From the components in formula electric machine control system between driving motor and electric machine controller, integration degree can be made higher, cost It is lower, but can be brought to driving motor since electric machine controller volume itself is larger and driving motor is integrated together excessive Pressure, and driving motor and electric machine controller can generate amount of heat during the work time, and the two integrates how Effective heat dissipation also becomes a urgent problem to be solved.Therefore, there is an urgent need to design a integrated level height, volume now Small, light-weight, the good integrated electric machine control system of heat dissipation performance, to meet the needs of domestic new-energy automobile industry.

Utility model content

The purpose of this utility model is exactly to provide a kind of integrated motor to overcome the problems of the above-mentioned prior art Drive system.

The purpose of this utility model can be achieved through the following technical solutions:

A kind of integrated motor driven systems, including driving motor and the electric machine controller being installed on above driving motor, institute Stating electric machine controller includes box assembly, case lid component, power module assembly, input module, output precision, high pressure separated time group Part, XY capacitance component and control panel component, the box assembly are installed on above driving motor, the power module group Part, input module, output precision, high pressure separated time component, XY capacitance component and control panel component are installed on inside box assembly, institute Case lid component is stated to be installed on above box assembly, the power module assembly, input module, output precision, XY capacitance component and The electrical connection of control panel component.

The box assembly includes cabinet, straight water pipe connector, curved water pipe head and rubber hose, and the cabinet is installed on It above driving motor, is sealed with driving motor by O-ring radial seal mode, the straight water pipe connector and curved water pipe head peace Cooling water channel both ends loaded on cabinet, the curved water pipe head of rubber hose one end connection electric machine controller, the other end connect Connect the curved water pipe head of driving motor.

The case lid component includes big case lid, middle case lid and small case lid, and the big case lid is installed on box assembly Side, the middle case lid are installed on above big case lid, and the small case lid is installed on above big case lid.

The power module assembly includes IGBT and driving plate, and the IGBT is the collection of bottom belt Pin-Fin structure Accepted way of doing sth one IGBT, is fixed on the cooling water channel of box assembly bottom surface, and the driving plate is installed on above IGBT, described The output end and output precision of power module assembly are electrically connected, the input terminal and XY capacitance component of the power module assembly Electrical connection.

The input module includes the first support, magnet ring and positive and negative copper bar, and first support is installed on cabinet On bottom plate, the magnet ring is installed on inside the first support, forms annular space, the positive and negative copper installation is in the first support Top is electrically connected across magnet ring and the XY capacitance component.

It further include high input voltage plug-in unit, the high input voltage plug-in unit is set to outside box assembly, with vehicle high-voltage line Constriction passes through box assembly after being integrally formed and the input module is electrically connected.

The output precision includes the second support, three-phase copper bar, current sensor and rotation varying signal harness, and described the Two supports are fixed on the bottom plate of cabinet, the three-phase copper installation above power module assembly, and respectively with power mould Block assembly and driving motor electrical connection, the current sensor are installed on three-phase copper bar, the rotation varying signal harness It is electrically connected respectively with control panel and driving motor.

The high pressure separated time component includes third support, switching copper bar and high pressure separated time plug-in unit, the third support It is installed on above input module, the switching copper installation is electrically connected above third support with input module, described High pressure separated time plug-in unit is installed on outside box assembly, is drawn vehicle high-voltage electricity by switching copper bar and high pressure separated time plug-in unit, is supplied Other High-Voltage Electrical Appliances of vehicle use.

The XY capacitance component includes X capacitor and Y capacitance, and the X capacitor is installed on the bottom plate of box assembly, institute Y capacitance encapsulating is stated inside X capacitor.

The control panel component includes barricade, control panel and low-voltage signal plug-in unit, and the barricade is installed on function Above rate modular assembly, the control panel is installed on above barricade, and the low-voltage signal plug-in unit is installed on box assembly Side passes through planar seal ring at the cooperation of low-voltage signal plug-in unit and box assembly and seals.

The base plate interior of the box assembly is equipped with the first cooling water channel, the straight water pipe connector and curved water pipe of box assembly Connector is respectively the first water inlet and the first water outlet of the first cooling water channel；The enclosure interior of the driving motor is provided with Second cooling water channel, the curved water pipe head of the driving motor and straight water pipe connector be respectively the second cooling water channel second into The mouth of a river and the second water outlet, first water outlet and the second water inlet are connected by the rubber hose of the box assembly It connects.

Compared with prior art, the utility model has the advantage that

(1) it is packaged in same cabinet by the way that electric machine controller is carried out height, and by membrane capacitance, power module, control Input terminal and output end are drawn by input module and output precision after the connection of the respective electrics such as plate, it can be directly by motor control Device is connected on driving motor by output precision, can solve existing electric machine controller significantly in this way and driving motor is integrated The wiring mess occurred in one；Simultaneously because several primary clusterings will be divided into inside electric machine controller, and by this Several primary clusterings are integrated in a controller case body, therefore can greatly reduce the volume and weight of electric machine controller, So that electric machine controller when being integrated in integrated with driving motor, will not generate excessive pressure to driving motor, ensure that The safety and stabilization of whole system, while reducing the weight and volume of whole system.

(2) confined space of box assembly and case lid component internal is realized to power module assembly, input module, defeated The encapsulation of component, high pressure separated time component, XY capacitance component and control panel component mentions to reduce the volume of electric machine controller out The degree of integration of high electric machine controller then improves the degree of integration of electric machine control system.

(3) power module assembly includes IGBT and driving plate, and IGBT has Pin-Fin structure, and Pin-Fin is filled with coolant liquid Tap touching, increasing heat radiation area improve the heat-sinking capability of electric machine controller, while by two essential electricals of IGBT and control panel Part is integrated together, so that the volume of entire power module greatly reduces, improves the degree of integration of entire electric machine controller, thus Improve the degree of integration of whole system.

(4) input module includes the first support, magnet ring and positive and negative copper bar, and magnet ring and positive and negative copper are fixed by the first support Row, then vehicle high-voltage wiring harness is introduced to connect with thin-film capacitor, so as to utilize electric car itself by positive and negative copper bar Electric energy powers for control system, and structure is simple and convenient for connection, therefore the assembly degree of control system can be improved, and is applicable in model It encloses wide.

(5) output precision includes the second support, three-phase copper bar, current sensor and rotation varying signal harness, passes through three-phase copper Row realizes the electrical connection with three-phase input pole plate in driving motor, realizes control panel and driving motor by rotation varying signal harness Internal rotary transformer connection, this mode of connection is simple, solves electric machine controller and drive in existing electric machine control system The problem of wiring confusion between dynamic motor.

(6) high pressure separated time component includes third support, switching copper bar and high pressure separated time plug-in unit, passes through switching copper bar and installation Vehicle high-voltage electricity is drawn in the high pressure separated time plug-in unit of box assembly outer wall, is used for other High-Voltage Electrical Appliances of vehicle, this mode Increase the use function of electric machine controller, securely and reliably, and saves arrangement space for vehicle, improve vehicle degree of integration.

(7) barricade is additionally provided between control panel and driving plate, it can be to avoid the integrated circuit on control panel and driving plate Electromagnetic interference occurs between each other, to improve the stability of entire control system work.

(8) signal socket connector is further fixed on control panel, signal socket connector is extend out to outside controller box, and signal connects It is sealed at the cooperation of plug-in unit and controller box by planar seal ring, while the degree of integration that ensure that electric machine controller The interface with the external world is provided for control panel, convenient for the data in control panel are saved and safeguarded.

(9) it is equipped with cooling water channel in controller box and driving motor, and two water channels are interconnected, so as to logical It crosses primary cooling water circulation while radiating for electric machine controller and driving motor, both enhanced heat-sinking capability nor meeting The volume of excessive increase control system, preferable heat dissipation is realized in the case where ensure that degree of integration.

Detailed description of the invention

Fig. 1 is the decomposition texture schematic diagram that the present embodiment integrates motor driven systems；

Fig. 2 is the floor map that the present embodiment integrates motor driven systems；

Fig. 3 is the schematic perspective view that the present embodiment integrates motor driven systems；

Appended drawing reference:

1 is driving motor, and 2 be electric machine controller, and 3 be the first water inlet, and 4 be the second water outlet, and 2-1 is box assembly, 2-1-1 is cabinet, and 2-1-2 is straight water pipe connector, and 2-1-3 is curved water pipe head, and 2-1-4 is rubber hose, and 2-2 is case lid group Part, 2-2-1 are big case lid, and 2-2-2 is middle case lid, and 2-2-3 is small case lid, and 2-3 is power module assembly, 2-3-1 IGBT, 2- 3-2 is driving plate, and 2-4 is input module, and 2-4-1 is the first support, and 2-4-2 is magnet ring, and 2-4-3 is positive and negative copper bar, and 2-5 is Output precision, 2-5-1 are the second support, and 2-5-2 is three-phase copper bar, and 2-5-3 is current sensor, and 2-5-4 is rotation varying signal line Beam, 2-6 are high pressure separated time component, and 2-6-1 is third support, and 2-6-2 is switching copper bar, and 2-7 is XY capacitance component, and 2-8 is control Making sheet component, 2-8-1 are barricade, and 2-8-2 is control panel, and 2-8-3 is low-voltage signal plug-in unit.

Specific embodiment

The utility model is described in detail in the following with reference to the drawings and specific embodiments.The present embodiment is with the utility model Implemented premised on technical solution, the detailed implementation method and specific operation process are given, but the guarantor of the utility model Shield range is not limited to the following embodiments.

Embodiment

In order to solve the problems, such as that existing integrated motor driven systems integrated level is low and wiring is chaotic, provided in the present embodiment A kind of integrated motor driven systems, including driving motor 1 and the electric machine controller 2 being installed on above driving motor 1, motor control Device 2 processed includes box assembly 2-1, case lid component 2-1, power module assembly 2-3, input module 2-4, output precision 2-5, height Separated time component 2-6, XY capacitance component 2-7 and control panel component 2-8, box assembly 2-1 is pressed to be installed on driving motor top, power Modular assembly 2-3, input module 2-4, output precision 2-5, high pressure separated time component 2-6, XY capacitance component 2-7 and control panel component 2-8 is installed on inside box assembly 2-1, and case lid component 2-2 is installed on above box assembly 2-1, power module assembly 2-3, defeated Enter component 2-4, output precision 2-5, XY capacitance component 2-7 and control panel component 2-8 electrical connection.

Wherein, box assembly 2-1 includes that cabinet 2-1-1, straight water pipe connector 2-1-2, curved water pipe head 2-1-3 and rubber are soft Pipe 2-1-4, cabinet 2-1-1 are installed on above driving motor, are sealed with driving motor by O-ring radial seal mode, straight water Pipe fitting 2-1-2 and curved water pipe head 2-1-3 is installed on the cooling water channel both ends of cabinet 2-1-1, and the one end rubber hose 2-1-4 connects The curved water pipe head 2-1-3 of electric machine controller is met, the other end connects the curved water pipe head of driving motor.

Power module assembly 2-3 and XY capacitance component 2-7 is mounted on inside box assembly 2-1, case lid component 2-2 peace Above box assembly 2-1, realize to power module assembly 2-3, input module 2-4, output precision 2-5, high pressure separated time group The encapsulation of part 2-6, XY capacitance component 2-7 and control panel component 2-8.

Case lid component 2-2 includes big case lid 2-2-1, middle case lid 2-2-2 and small case lid 2-2-3, big case lid 2-2-1 installation Above box assembly 2-1, middle case lid 2-2-2 is installed on above big case lid 2-2-1, and small case lid 2-2-3 is installed on big case lid Square 2-2-1.

Power module 2-3 includes IGBT2-3-1 and driving plate 2-3-2, IGBT2-3-1 are bottom belt Pin-Fin structure Integrated form one IGBT, is fixed on the cooling water channel of the bottom surface box assembly 2-1, and driving plate 2-3-2 is installed on IGBT2-3-1 Side, the output end and output precision 2-5 of power module assembly 2-3 are electrically connected, input terminal and the XY electricity of power module assembly 2-3 Hold component 2-7 electrical connection, control panel component is installed on above driving plate 2-3-2.

Input module 2-4 includes the first support 2-4-1, magnet ring 2-4-2 and positive and negative copper bar 2-4-3, the first support 2-4-1 It is installed on the bottom plate of cabinet, magnet ring 2-4-2 is installed on inside the first support 2-4-1, forms annular space, positive and negative copper bar 2-4- 3 are installed on above the first support 2-4-1, pass through magnet ring 2-4-2 and XY capacitance component 2-7 and are electrically connected.

Input module 2-4 further includes high input voltage plug-in unit, and high input voltage plug-in unit is set to outside box assembly 2-1, and whole Overall height crimping constriction passes through box assembly 2-1 and input module 2-4 other component after being integrally formed is electrically connected.

Output precision 2-5 includes the second support 2-5-1, three-phase copper bar 2-5-2, current sensor 2-5-3 and rotation varying signal Harness 2-5-4, the second support 2-5-1 are fixed on the bottom plate of cabinet, and three-phase copper bar 2-5-2 is installed on power module assembly 2-3 Top, and be electrically connected respectively with power module assembly 2-3 and driving motor, current sensor 2-5-3 is installed on three-phase copper bar On 2-5-2, rotation varying signal harness 2-5-4 is electrically connected with control panel and driving motor respectively.

High pressure separated time group 2-6 part includes third support 2-6-1, switching copper bar 2-6-2 and high pressure separated time plug-in unit, third support 2-6-1 is installed on above input module 2-4, and switching copper bar 2-6-2 is installed on above third support 2-6-1, with input module 2-4 Electrical connection, high pressure separated time plug-in unit are installed on outside box assembly 2-1, will by switching copper bar 2-6-2 and high pressure separated time plug-in unit Vehicle high-voltage electricity is drawn, and is used for other High-Voltage Electrical Appliances of vehicle.

XY capacitance component 2-7 includes X capacitor and Y capacitance, and X capacitor is installed on the bottom plate of box assembly 2-1, and Y capacitance fills It is encapsulated in inside X capacitor.

Control panel component 2-8 includes barricade 2-8-1, control panel 2-8-2 and low-voltage signal plug-in unit 2-8-3, barricade 2- 8-1 is installed on above power module assembly 2-3, and control panel 2-8-2 is installed on above barricade 2-8-1, low-voltage signal plug-in unit 2- 8-3 is installed on the side box assembly 2-1, passes through flat seal at the cooperation of low-voltage signal plug-in unit 2-8-3 and box assembly 2-1 Circle sealing.

The base plate interior of box assembly 2-1 be equipped with the first cooling water channel, the straight water pipe connector 2-1-2 of box assembly 2-1 and Curved water pipe head 2-1-3 is respectively the first water inlet and the first water outlet of the first cooling water channel；The enclosure interior of driving motor Be provided with the second cooling water channel, the curved water pipe head of driving motor and straight water pipe connector be respectively the second cooling water channel second into The mouth of a river and the second water outlet, the first water outlet are connect with the second water inlet by the rubber hose 2-1-4 of box assembly 2-1.

The integrated motor driven systems realized according to above structure are as shown in FIG. 1 to 3, it can be seen from the figure that the system It is mainly made of driving motor 1 and electric machine controller 2, electric machine controller is mainly by cabinet 2-1, case lid component 2-2, power module Component 2-3, input module 2-4, output precision 2-5, high pressure separated time component 2-6, XY capacitance component 2-7, control panel component 2-8 Composition；Power module assembly 2-3 is by two essential electrical part modularized designs manufacture of electric machine controller, including IGBT2-3- 1 and driving plate 2-3-2；XY capacitance component 2-7, IGBT2-3-1, support 2-4-1 and support 2-5-1 are mounted on box assembly 2-1 On；Box assembly 2-1, which is corresponded to, is provided with cooling water channel below the position XY capacitance component 2-7 and IGBT2-3-1；Driving plate 2-3-2 It is mounted on IGBT2-2-1, magnet ring 2-4-2 covers the annular space inside support 2-4-1, and with curable epoxide, positive and negative copper bar 2-4-3 passes through magnet ring 2-4-2 and XY capacitance component 2-7 and is electrically connected, and three-phase copper bar 2-5-2 and IGBT2-2-1 are electrically connected, Current sensor 2-5-3 is installed on three-phase copper bar 2-5-2, and control panel component 2-8 is mounted on driving plate 2-3-2, low pressure letter Number plug-in unit 2-8-3 passes through box assembly 2-1 side wall, and by planar seal ring sealing at cooperation, support 2-6-1 is mounted on input group On part 2-4, positive and negative copper bar 2-4-3 electrical connection, case lid component 2-2 are mounted on box assembly 2-1 more than the copper bar 2-6-2 that transfers； Box assembly 2-1 is set to 1 top of driving motor, the i.e. casing upper surface that box assembly 2-1 is mounted on driving motor 1, cooperation Place passes through O-ring radial seal；The rotation varying signal harness 2-5-4 and three-phase copper bar 2-5-2 drawn inside electric machine controller 2 is worn 1 casing of motor of overdriving is electrically connected with motor 1, and in the present embodiment, the output end of driving motor is internal spline structure；Motor The bottom box assembly 2-1 of controller 2 is provided with radiation water channel and water inlet 3 in communication, and driving motor 1 is provided with C Type water channel and water outlet 4 in communication, the radiation water channel of box assembly 2-1 are connected to the water inlet 3 of electric machine controller 2, The water outlet of electric machine controller 2 is connected to by rubber hose 2-1-4 with the cooling water channel of driving motor 1, and coolant liquid first passes through electricity The water inlet 3 of machine controller 2 enters in the radiation water channel of box assembly 2-1, then using the water outlet of electric machine controller 2 Mouth and rubber hose 2-1-4 are flowed into the cooling water channel of driving motor 1, are finally flowed out by the water outlet 4 of driving motor 1.

Claims

1. a kind of integrated motor driven systems, which is characterized in that including electricity driving motor (1) and be installed on above driving motor Machine controller (2), the electric machine controller (2) include box assembly (2-1), case lid component (2-2), power module assembly (2- 3), input module (2-4), output precision (2-5), high pressure separated time component (2-6), XY capacitance component (2-7) and control panel component (2-8), the box assembly (2-1) are installed on above driving motor, the power module assembly (2-3), input module (2-4), output precision (2-5), high pressure separated time component (2-6), XY capacitance component (2-7) and control panel component (2-8) are installed on Box assembly (2-1) is internal, and the case lid component (2-2) is installed on above box assembly (2-1), the power module assembly (2-3), input module (2-4), output precision (2-5), XY capacitance component (2-7) and control panel component (2-8) electrical connection.

2. a kind of integrated motor driven systems according to claim 1, which is characterized in that the box assembly (2-1) Including cabinet (2-1-1), straight water pipe connector (2-1-2), curved water pipe head (2-1-3) and rubber hose (2-1-4), the cabinet (2-1-1) is installed on above driving motor (1), is sealed with driving motor (1) by O-ring radial seal mode, the straight water Pipe fitting (2-1-2) and curved water pipe head (2-1-3) are installed on the cooling water channel both ends of cabinet (2-1-1), and the rubber is soft The curved water pipe head (2-1-3) of the one end (2-1-4) connection electric machine controller is managed, the other end connects the curved water pipe of driving motor (1) Connector.

3. a kind of integrated motor driven systems according to claim 1, which is characterized in that the power module assembly (2-3) includes IGBT (2-3-1) and driving plate (2-3-2), and the IGBT (2-3-1) is the collection of bottom belt Pin-Fin structure Accepted way of doing sth one IGBT is fixed on the cooling water channel of the bottom surface box assembly (2-1), and the driving plate (2-3-2) is installed on IGBT Above (2-3-1), the output end and output precision (2-5) of the power module assembly (2-3) are electrically connected, the power The input terminal and XY capacitance component (2-7) of modular assembly (2-3) are electrically connected.

4. a kind of integrated motor driven systems according to claim 1, which is characterized in that the input module (2-4) Including the first support (2-4-1), magnet ring (2-4-2) and positive and negative copper bar (2-4-3), first support (2-4-1) is installed on On the bottom plate of box assembly (2-1), the magnet ring (2-4-2) is installed on the first support (2-4-1) inside, and it is empty to form annular Between, the positive and negative copper bar (2-4-3) is installed on above the first support (2-4-1), passes through magnet ring (2-4-2) and the XY electricity Hold component (2-7) electrical connection.

5. a kind of integrated motor driven systems according to claim 1, which is characterized in that it further include high input voltage plug-in unit, The high input voltage plug-in unit is set to box assembly (2-1) outside, and cabinet is passed through after becoming one with vehicle high-voltage wiring harness Component (2-1) and the input module (2-4) are electrically connected.

6. a kind of integrated motor driven systems according to claim 1, which is characterized in that the output precision (2-5) Including the second support (2-5-1), three-phase copper bar (2-5-2), current sensor (2-5-3) and rotation varying signal harness (2-5-4), institute The second support (2-5-1) stated is fixed on the bottom plate of box assembly (2-1), and the three-phase copper bar (2-5-2) is installed on function It above rate modular assembly (2-3), and is electrically connected respectively with power module assembly (2-3) and driving motor, the electric current passes Sensor (2-5-3) is installed on three-phase copper bar (2-5-2), the rotation varying signal harness (2-5-4) respectively with control panel component The electrical connection of (2-8) and driving motor (1).

7. a kind of integrated motor driven systems according to claim 1, which is characterized in that the high pressure separated time component (2-6) includes third support (2-6-1), switching copper bar (2-6-2) and high pressure separated time plug-in unit, the third support (2-6-1) It is installed on above input module (2-4), the switching copper bar (2-6-2) is installed on above third support (2-6-1), with input Component (2-4) electrical connection, the high pressure separated time plug-in unit are installed on box assembly (2-1) outside, pass through the copper bar (2-6- that transfers 2) vehicle high-voltage electricity is drawn with high pressure separated time plug-in unit, is used for other High-Voltage Electrical Appliances of vehicle.

8. a kind of integrated motor driven systems according to claim 1, which is characterized in that the XY capacitance component (2- It 7) include X capacitor and Y capacitance, the X capacitor is installed on the bottom plate of box assembly (2-1), and the Y capacitance encapsulating is in X electricity Hold internal.

9. a kind of integrated motor driven systems according to claim 1, which is characterized in that the control panel component (2- It 8) include barricade (2-8-1), control panel (2-8-2) and low-voltage signal plug-in unit (2-8-3), the barricade (2-8-1) peace Loaded on above power module assembly (2-3), the control panel (2-8-2) is installed on above barricade (2-8-1), and described is low Pressure signal plug-in unit (2-8-3) is installed on the side box assembly (2-1), low-voltage signal plug-in unit (2-8-3) and box assembly (2-1's) It is sealed at cooperation by planar seal ring.

10. a kind of integrated motor driven systems according to claim 1, which is characterized in that the box assembly (2-1) Base plate interior be equipped with the first cooling water channel, the straight water pipe connector (2-1-2) and curved water pipe head (2-1- of box assembly (2-1) 3) be respectively the first cooling water channel the first water inlet (3) and the first water outlet；The enclosure interior of the driving motor is arranged There is the second cooling water channel, the curved water pipe head of the driving motor and straight water pipe connector are respectively the second of the second cooling water channel Water inlet and the second water outlet (4), first water outlet and the second water inlet pass through the rubber of the box assembly (2-1) Glue hose (2-1-4) connection.