CN110676973A - A new energy water-cooled motor housing and water-cooled motor with integrated controller housing - Google Patents

Abstract

The invention discloses a new energy water-cooled motor housing integrated with a controller housing and a water-cooled motor, comprising a new energy water-cooled motor housing integrated with a controller housing, including an integrally cast water-cooled motor The outer wall of the water-cooled motor housing is provided with a water inlet and a water outlet, and a cooling water channel is arranged inside the water-cooled motor housing, and the cooling water channel is connected to the water outlet, and the water-cooled motor housing The body is also integrally formed with a front end cover and an IGBT module installation slot. The inner peripheral surface of the water-cooled motor housing is machined with a stator positioning slot arranged along its radial direction. The cooling water channel is connected to the IGBT module cooling water channel, and the IGBT module cooling water channel is connected to the water inlet. The motor casing has compact structure, less machining, low cost, easy assembly and high reliability; the water channel sand core has a simple structure and low cost; and the water channel has good heat dissipation performance.

Description

A new energy water-cooled motor housing and water-cooled motor with integrated controller housing

technical field

The invention relates to a new energy motor housing structure, belonging to the technical field of electric vehicle motor structure design, manufacture and production.

technical background

At present, there are generally two types of water-cooled motor housing structures: integrated and non-integrated. The integrated housing generally integrates the motor housing with the motor end cover or the controller housing as a whole. The integrated housing has a compact structure, less machining, fewer parts, simple assembly, and low manufacturing cost. A non-integrated housing means that there is no motor end cover or controller housing integrated. The non-integrated shell has many machining processes, large number of parts, complicated assembly and high manufacturing cost.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the problems existing in the current new energy motor housing, and to provide an integrated motor housing with compact structure, less machining, fewer parts, simple assembly, low cost and high reliability.

In order to achieve the above purpose, the present invention provides a technical solution for a new energy water-cooled motor housing with an integrated controller housing, which includes a new energy water-cooled motor housing with an integrated controller housing, including an integrally cast and formed motor housing. A water-cooled motor housing, the outer wall of the water-cooled motor housing is provided with a water inlet and a water outlet, and a cooling water channel is arranged inside the water-cooled motor housing, the cooling water channel is connected to the water outlet, and the water-cooled The motor housing is also integrally formed with a front end cover and an IGBT module installation slot. The inner peripheral surface of the water-cooled motor housing is machined with a stator positioning slot arranged along its radial direction. The inside of the IGBT module installation slot is An IGBT module cooling water channel communicated with the cooling water channel is provided, and the IGBT module cooling water channel is communicated with the water inlet.

In a preferred embodiment of the present invention, a bearing mounting hole for mounting a front bearing of the motor is cast and formed on the front end cover, and the bearing mounting hole is arranged coaxially with the water-cooled motor housing.

In a preferred embodiment of the present invention, the outer end face of the front end cover is formed with a motor and a reduction box positioning stop coaxially arranged with the water-cooled motor housing.

In a preferred embodiment of the present invention, the cross-sectional shape of the cooling water channel is an isosceles trapezoid.

In a preferred embodiment of the present invention, there is no rounded corner between the two oblique sides and the bottom edge of the cooling water channel, and a rounded corner is provided between the two oblique sides and the top edge.

In a preferred embodiment of the present invention, the front end cover is provided with mounting holes for the motor and the reduction box.

In a preferred embodiment of the present invention, the IGBT module cooling water channel and the cooling water channel are formed by sand core casting, and the sand core includes a plate-shaped S-shaped portion for forming the IGBT module cooling water channel and a plate-shaped S-shaped portion for forming the cooling water channel. The cylindrical helix of the water channel.

The invention also discloses a water-cooled motor, which includes an IGBT module and a motor stator, and also includes the aforementioned new energy water-cooled motor housing, wherein the motor stator is installed in a stator mounting hole of the water-cooled motor housing, so The IGBT module is installed in the IGBT module installation slot of the water-cooled motor housing, and the IGBT module installation slot is directly connected to the motor stator through U-phase copper bars, V-phase copper bars and W-phase copper bars.

In a preferred embodiment of the present invention, an auxiliary positioning slot for matching with the stator positioning slot is provided on the outer peripheral surface of the stator of the motor.

The main advantages and effects of the invention are as follows: the motor casing has a compact structure, less machining, low cost, easy assembly and high reliability; the water channel sand core has a simple structure and low cost; the water channel has good heat dissipation performance; , The front end cover is directly integrated on the motor casing, which effectively reduces the volume of the motor, ensures the coaxiality of the motor rotor and the stator after the whole machine is assembled, and improves the bearing and bearing installation hole force and NVH when the motor is working. Improve the reliability of the motor, and at the same time make the IGBT module and the motor stator directly connected through the UVW three-phase copper bars, without the need for the high-voltage three-phase line connection in the prior art, reducing the number of parts, reducing the assembly workload, and reducing costs; at the same time, further The inner end face of the water-cooled motor casing is machined with stator positioning grooves arranged along its radial direction, thereby facilitating the positioning and assembly of the stator; further, the present invention facilitates the spiral water channel through the design of the cooling water channel. After the sand core is formed, it is demolded from the sand core mold.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is another schematic diagram of the present invention;

3 is a sectional view of the present invention;

Fig. 4 is the schematic diagram of the water channel of the present invention;

FIG. 5 is a schematic diagram of the application of the present invention.

In the figure: 1- motor housing body, 2- water outlet, 3- water inlet, 4- motor and gearbox mounting holes, 5- controller housing, 6- DC high voltage line mounting holes, 7- IGBT module mounting slot , 8-Signal cable mounting hole, 9-Front end cover bearing mounting hole, 10-Front end cover, 11-Motor and gear box positioning stopper, 12-Cooling water channel, 13-Stator positioning slot, 14-Stator mounting hole, 15- DC high voltage line, 16-IGBT module, 17-U phase copper bar, 18-V phase copper bar, 19-W phase copper bar, 20-motor stator; 21-sand core.

Detailed ways

In order to make the technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

As shown in Figure 1, Figure 2, Figure 3, Figure 4 and Figure 5, a new energy water-cooled motor housing with integrated controller housing implemented in the present invention includes: an integrally cast water-cooled motor housing The main body 1; its interior is provided with a cooling water channel 12, the spiral water channel 12 is arranged in a spiral shape along its axial direction, the inlet of the spiral water channel 12 is the IGBT module cooling water channel 7, the outlet of the spiral water channel 12 is the water outlet 3, and the cross section of the spiral water channel 12 is isosceles Trapezoid, the angle between the hypotenuse and the bottom is 3°, and the two hypotenuses and the bottom have no rounded corners, and the two hypotenuses and the top are rounded. This structure is conducive to the release of the water channel sand core from the water channel sand core mold, which is convenient for manufacturing. ;The spiral water channel is used to cool the motor stator;

The upper part of the motor housing body 1 integrates a controller housing 5, and the controller housing 5 is provided with an S-shaped IGBT module cooling water channel 7 for cooling the IGBT module; the controller housing 5 is provided with a DC high-voltage line mounting hole 6 and a signal Line mounting hole 8;

The S-shaped IGBT module cooling water channel 7 inside the controller housing 5 and the spiral motor housing water channel 12 inside the motor housing body 1 are in series structure. The cooling liquid enters the IGBT module cooling water channel 7 from the water inlet 3 to cool the IGBT After the module, it enters the motor housing water channel 12 to cool the motor stator, and flows out from the water outlet 2;

The main advantages of the integration of the motor housing body 1 and the controller housing 5 are as follows: there is no need to design and process the assembly surface between the two, there is no positioning structure and fixing bolts between the two, and the two are directly integrated without assembly. There is no sealing structure or device between them, so the structure is simple, the manufacturing cost is low, and the integrated structure is highly reliable; the cooling water channel 7 of the IGBT module and the water channel 12 of the spiral motor casing are in series structure, and the two do not need traditional controllers and motors. The pipeline connection between them reduces the risk of leakage, reduces the manufacturing cost, and improves the reliability of the pipeline-free design; 19. Direct connection, no need for high-voltage three-phase line connection in the prior art, reducing the number of parts, reducing assembly workload, and reducing costs;

In addition, the motor housing body 1 is integrated with a front end cover 10, and the front end cover 10 is integrated with a motor and a reduction box mounting hole 4; the mounting hole 4 is used to fix the motor and the reduction box;

The main advantages of the integration of the motor housing body 1 and the front end cover 10: there is no need to design and process the assembly surface between the two, no positioning structure or device, no fixing bolts, no sealing structure, no assembly, reducing manufacturing And assembly cost, the integrated structure improves reliability;

The above-mentioned front end cover 10 is provided with a positioning stop 11 for the motor and the reduction box, which is used for positioning when the motor and the reduction box are assembled, and the inner circle of the positioning stop is used to install an oil seal or other sealing device;

The above-mentioned front end cover 10 is provided with a bearing installation hole 9 for installing the front bearing of the motor; the bearing installation hole 9 and the stator installation hole 14 are machined and formed at one time, and the axes of the two are highly coaxial, which can ensure that the motor rotor after the whole machine is assembled. The coaxiality of the stator improves the bearing and bearing mounting hole force and NVH when the motor is working, and improves the reliability of the motor;

At the same time, a semi-circular stator positioning hole 13 is integrated on the stator mounting surface inside the motor housing body 1, and another semi-circular positioning hole is provided on the motor stator 20, and the two semi-circular positioning holes are combined into a circular hole. A positioning pin is inserted into the circular hole for positioning the motor stator 20 and the housing 1 to prevent the stator 20 from rotating in the motor housing 1 when the motor is working;

The specific implementation cases of the present invention are described in detail above, and are not intended to limit the present invention; corresponding to those skilled in the art, the present invention may have various changes and modifications; any modification or replacement made within the scope of the principles of the present invention , improvements, etc. are all included in the protection scope of the present invention.

Claims (9)

1. A new energy water-cooled motor housing integrated with a controller housing, comprising a water-cooled motor housing (1) integrally cast and formed, and a water inlet is provided on the outer wall of the water-cooled motor housing (1). (3) and a water outlet (2), a cooling water channel (12) is provided inside the water-cooled motor housing (1), and the cooling water channel (12) communicates with the water outlet (2), and is characterized in that: The water-cooled motor housing (1) is also integrally formed with a front end cover (10) and an IGBT module mounting slot (7), and the inner peripheral surface of the water-cooled motor housing (1) is machined with a diameter along the The stator positioning grooves (13) arranged in the direction of the IGBT module installation grooves (7) are provided with cooling water channels for IGBT modules that communicate with the cooling water channels (12), and the cooling water channels for the IGBT modules communicate with the water inlets (3). ). 2. The new energy water-cooled motor housing with integrated controller housing according to claim 1, wherein the front end cover (10) is formed with a bearing mounting hole ( 9), the bearing mounting holes (9) are arranged coaxially with the water-cooled motor housing (1). 3. A new energy water-cooled motor housing integrated with a controller housing according to claim 1, characterized in that: the outer end surface of the front end cover (6) is cast and formed with the water-cooled motor housing The body (1) is coaxially arranged with the motor and the gear box positioning stopper (11). 4 . The new energy water-cooled motor housing with integrated controller housing according to claim 1 , wherein the cross-sectional shape of the cooling water channel ( 12 ) is an isosceles trapezoid. 5 . 5. The new energy water-cooled motor housing with integrated controller housing according to claim 4, characterized in that there is no rounded corner between the two hypotenuses and the bottom edge of the cooling water channel (12), and the two A rounded corner is set between the hypotenuse and the top edge. 6 . The new energy water-cooled motor housing with integrated controller housing according to claim 1 , wherein the front end cover ( 6 ) is provided with mounting holes ( 4 ) for the motor and the reduction box. 7 . 7 . The new energy water-cooled motor housing with integrated controller housing according to claim 1 , wherein the IGBT module cooling water channel and the cooling water channel ( 12 ) are cast with sand cores ( 21 ). 8 . For forming, the sand core (21) comprises a plate-shaped S-shaped part (21.1) for forming the cooling water channel of the IGBT module and a columnar spiral part (21.2) for forming the cooling water channel (12). 8. A water-cooled motor, comprising an IGBT module (16) and a motor stator (20), characterized in that: further comprising the new energy water-cooled motor housing as claimed in any one of claims 1-9, said The motor stator (20) is installed in the stator installation hole (14) of the water-cooled motor housing (1), and the IGBT module (16) is installed in the IGBT module installation slot of the water-cooled motor housing (1). In (7), the IGBT module installation slot (7) is directly connected to the motor stator (20) through U-phase copper bars (17), V-phase copper bars (18) and W-phase copper bars (19). 9 . The water-cooled motor according to claim 8 , wherein an auxiliary positioning slot for matching with the stator positioning slot ( 13 ) is provided on the outer peripheral surface of the motor stator ( 20 ). 10 .

Images