CN204316231U - A kind of motor for pure electric vehicle casing structure with annular cooling water pipe - Google Patents

Abstract

The utility model relates to a kind of motor for pure electric vehicle casing structure with annular cooling water pipe, comprise cooling water pipe and stainless steel stay pipe, the madial wall of stainless steel stay pipe and the stator close contact of motor, with the axial straight line of the optional position on stainless steel stay pipe cylindrical sidewall for boundary, cooling water pipe is from one end of stainless bracing members pipe, the side of axial straight line extends to the opposite side of axial straight line along the periphery of stainless steel stay pipe, oppositely extended by U-shaped tube transitions again and get back to original side, so extend arrangement continuously, until be aligned to the other end of stainless steel stay pipe, the lateral surface of stainless steel stay pipe is equipped with the metal master layer covered by cooling water pipe parcel, one end of cooling water pipe is water inlet, the other end is delivery port.The utility model casing has good heat dissipation effect, and intensity is high, and manufacturing process is simple and reliable, is applicable to relatively large motor of electric motor car.

Description

A pure electric vehicle motor casing structure with annular cooling water pipe

technical field

The utility model relates to the field of motor casings, in particular to a motor casing structure for pure electric vehicles with annular cooling water pipes.

Background technique

As the country vigorously promotes the development of new energy vehicles, new energy vehicles, especially pure electric vehicles, have been applied in various industries, such as public transportation, airport internal transportation, etc. The most important thing in the powertrain of pure electric vehicles is Electric motors, in the structure of some large vehicles such as buses, have high requirements for electric motors. The volume of the electric motor is large, and the shell size of the electric motor is often about 600mm in length, which leads to the quality of the electric motor shell and its bearing capacity. The mass of the motor is very large. Most of the existing motor shells are made of metal materials with a certain thickness. The inside of the shell is also equipped with cooling water pipes or cooling channels, and most of the metal shells are formed by casting. The internal density is not very high, and without a reinforced structure, the strength of the shell is difficult to meet the requirements of use.

In addition, the cooling water pipes or cooling channels in the existing motor casing are mostly arranged in the middle of the side wall of the motor casing, which is far away from the stator and rotor inside the motor, and the heat dissipation and cooling effect is not good. During operation, the heat dissipation effect will not meet the requirements, which will affect the normal use of the motor.

Contents of the invention

The technical problem to be solved by the utility model is to provide a pure electric vehicle motor casing structure with an annular cooling water pipe. .

The technical solution adopted by the utility model to solve the technical problem is: to provide a pure electric vehicle motor casing structure with an annular cooling water pipe, including a cooling water pipe and a stainless steel support pipe, the inner side wall of the stainless steel support pipe and the motor The stator of the stainless steel support tube is in close contact with the outer side of the stainless steel support tube. There are cooling water pipes evenly distributed around the circumference, bounded by an axial line at any position on the outer circular side wall of the stainless steel support tube. The cooling water pipe starts from one end of the stainless steel support tube 1. One side of the axial line extends along the circumferential surface of the stainless steel support tube to the other side of the axial line, and then extends back to the original side through the transition of the U-shaped tube, so that it is continuously extended and arranged until it reaches the stainless steel At the other end of the support tube, the outer surface of the stainless steel support tube is laid with a metal main body layer covering the cooling water pipe. One end of the cooling water pipe is a water inlet, and the other end is a water outlet.

As a supplement to the technical solution of the utility model, the water inlet and water outlet of the cooling water pipe are arranged on the axial straight line.

As a supplement to the technical solution described in the present invention, the water inlet and water outlet extend outward along the radial direction of the stainless steel support tube and protrude outside the metal main body layer.

As a supplement to the technical solution described in the utility model, the water inlet and outlet are provided with external threads or internal threads.

Beneficial effect

The utility model relates to a pure electric vehicle motor casing structure with an annular cooling water pipe. The casing structure is simple and has the following advantages: (1) A stainless steel support tube is added to the original casing, which greatly improves the overall strength of the casing (2) The stainless steel support tube is in direct contact with the internal motor stator, which shortens the distance between the cooling water pipe and the motor stator, which is conducive to heat transfer. The contact area between the cooling water and the tube wall in the ring structure is large, and the heat dissipation effect is good. Motors suitable for large electric vehicles.

Description of drawings

Fig. 1 is a half-cut structure diagram of the utility model;

Fig. 2 is a three-dimensional structure diagram of the utility model.

Detailed ways

Below in conjunction with specific embodiment, further set forth the utility model. It should be understood that these embodiments are only used to illustrate the present utility model and are not intended to limit the scope of the present utility model. In addition, it should be understood that after reading the content taught by the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by the appended claims of the application.

As shown in Figure 1-2, the embodiment of the present utility model relates to a pure electric vehicle motor casing structure with an annular cooling water pipe, including a cooling water pipe 1 and a stainless steel support pipe 2, the inner side of the stainless steel support pipe 2 The wall is in close contact with the stator of the motor, and the outside of the stainless steel support tube 2 is evenly distributed around the circumference with cooling water pipes 1, bounded by an axial line at any position on the outer circular side wall of the stainless steel support tube 2, the cooling water pipe 1. From one end of the stainless steel support tube 2, one side of the axial line extends along the circumferential surface of the stainless steel support tube 2 to the other side of the axial line, and then reversely extends back to the original side through the U-shaped tube transition, Extend and arrange in this way until it reaches the other end of the stainless steel support pipe 2. The outer surface of the stainless steel support pipe 2 is laid with a metal main body layer 3 that wraps the cooling water pipe 1. One end of the cooling water pipe 1 is Water outlet 4, the other end is water outlet 5.

The water inlet 4 and the water outlet 5 of the cooling water pipe 1 are arranged on the axial straight line.

The water inlet and water outlet extend outward along the radial direction of the stainless steel support pipe 2 and protrude outside the metal main body layer 3 .

The water inlet 4 and the water outlet 5 have external threads or internal threads.

The ring-shaped cooling water pipe structure has a small convective heat transfer coefficient, but has the largest contact area with water, and has a good heat dissipation effect.

The above casing structure can be manufactured by low-pressure die-casting process. The specific manufacturing process is as follows: a. After assembling the cooling water pipe 1 and the stainless steel support pipe 2, place them in the center of the mold cavity of the die-casting mold. The two ends of the mold cavity pass through the cover Plate sealing; b. There is molten metal in the crucible or furnace on one side of the die-casting mold. When the pressure is applied to the crucible or furnace, the crucible or furnace discharges the molten metal and makes the molten metal run up the pipe and enter the mold cavity, filling into the space between the stainless steel support tube 2 and the inner wall of the mold cavity; c. After the molten metal fills the entire mold cavity, cool the mold, and remove the cover plates at both ends after the metal main body layer in the mold cavity is cooled and solidified , Remove the manufactured motor housing for deburring.

Claims (4)

1. A motor casing structure for pure electric vehicles with annular cooling water pipes, comprising cooling water pipes (1) and stainless steel support pipes (2), characterized in that the inner sidewall of the stainless steel support pipes (2) and the motor The stator is in close contact, and the outside of the stainless steel support tube (2) is evenly distributed with cooling water pipes (1) around the circumference, bounded by an axial line at any position on the outer circular side wall of the stainless steel support tube (2), The cooling water pipe (1) extends from one end of the stainless steel support pipe (2), one side of the axial straight line along the circumferential surface of the stainless steel support pipe (2) to the other side of the axial straight line, and then transitions through the U-shaped pipe. Extend back to the original side, and extend and arrange in this way until it reaches the other end of the stainless steel support pipe (2), the outer surface of the stainless steel support pipe (2) is laid with a cooling water pipe (1) wrapped Metal main body layer (3), one end of the cooling water pipe (1) is a water inlet (4), and the other end is a water outlet (5). 2. The pure electric vehicle motor casing structure with annular cooling water pipe according to claim 1, characterized in that: the water inlet (4) and the water outlet (5) of the cooling water pipe (1) are arranged in said axial line. 3. The pure electric vehicle motor casing structure with annular cooling water pipe according to claim 1 or 2, characterized in that: the water inlet (4) and the water outlet (5) are along the stainless steel support pipe (2 ) extends radially outwards on the outside of the metal main body layer (3). 4. The pure electric vehicle motor casing structure with annular cooling water pipe according to claim 3, characterized in that: the water inlet (4) and the water outlet (5) have external threads or internal threads.