Water-cooled motor integrated shell

Abstract

The utility model discloses a water-cooled motor integrated shell, which comprises a water-cooled jacket and a motor shell, the bottom of the motor shell is provided with an integrally formed speed reducer shell, the outer circumference of the water-cooled jacket is provided with a cooling water channel spirally surrounding the circumference, and the two ends of the cooling water channel are respectively provided with a water inlet and a water outlet; the water-cooled jacket is pressed in a cavity of the motor shell, one end of the water-cooled jacket is fixed to the motor shell in a tolerance fit mode, the other end of the water-cooled jacket is fixed to the speed reducer shell in a tolerance fit mode, the bottom of the water-cooled jacket and the periphery of the speed reducer shell form a closed cavity, the cavity is communicated with the cooling water channel, and cooling water input from the water inlet enters the cooling water channel. And after flowing through the cavity, the water is discharged from the water outlet. The heat exchanger has the characteristics of compact structure, good heat exchange effect, high utilization rate of cooling water resources and the like, and eliminates the problem of cooling water stagnation caused by a stagnant water area.

Description

Technical Field

[0001] The utility model relates to the technical field of water-cooled motors for new energy vehicles, and in particular to an integrated housing for a water-cooled motor. Background Art

[0002] With the continuous development of the new energy vehicle industry, water-cooled motor integrated housings are gaining widespread adoption among automakers due to their compact structure and excellent NVH performance. These integrated housings integrate the water jacket and motor housing, with the motor stator press-fitted onto the water jacket. Motor heat dissipation primarily relies on cooling water flowing through the water jacket to remove heat from the stator.

[0003] In traditional integrated housings, the end of the water jacket and the inner cavity of the motor housing easily form a closed cavity, which is formed by a machined mating surface. This machined mating surface does not have a sealing function. In order to prevent the airtightness test of the water jacket cooling water channel from being interfered with by this mating surface, a gap is usually opened between the closed cavity and the water channel to facilitate the smooth filling of the cavity by airflow during the airtightness test. This also brings a problem. When the water-cooled electric drive is working, the cooling water passing through the water jacket will enter this closed cavity through the gap or machined mating surface, causing the cooling water in this part of the cavity to be stagnant and unable to participate in the circulation. This closed area is also called a dead water zone.

[0004] The presence of this dead water zone causes unnecessary use of cooling water resources throughout the vehicle, hindering motor heat dissipation. It also results in excessive flow resistance after the cooling water enters the water jacket, a low average convective heat transfer coefficient on the jacket wall, and insufficient heat transfer capacity. This utility model addresses this issue of dead water zones occupying cooling water resources, while also reducing cooling water flow resistance and improving the heat transfer performance of the jacket. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a water-cooled motor integrated housing with a compact structure, good heat exchange effect and high cooling water resource utilization rate, in order to solve the cooling water stagnation problem caused by the dead water area in the existing water-cooled motor integrated housing.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A water-cooled motor integrated housing comprises a water-cooling jacket and a motor housing, wherein an integrally formed reducer housing is provided at the bottom of the motor housing, and a cooling water channel spirally surrounding the circumference of the water-cooling jacket is provided on the outer circumference thereof, and a water inlet and a water outlet are respectively provided at both ends of the cooling water channel; the water-cooling jacket is press-fitted into the cavity of the motor housing, and one end of the water-cooling jacket is fixed to the motor housing by a tolerance fit, and the other end of the water-cooling jacket is fixed to the reducer housing by a tolerance fit, and a closed cavity is formed between the bottom of the water-cooling jacket and the outer circumference of the reducer housing, and the cavity is communicated with the cooling water channel, and the cooling water inputted from the water inlet enters the cooling water channel, flows through the cavity, and is discharged from the water outlet.

[0008] As a further improvement of the present invention, the water retaining ribs at the bottom of the water cooling jacket include end water retaining ribs and water channel water retaining ribs, the end water retaining ribs are close to the water outlet, and the water channel water retaining ribs are located at the end of the cooling water channel and close to the end water retaining ribs; when the end water retaining ribs are connected to the water channel water retaining ribs, the cavity is connected to the cooling water channel to form a one-way channel, and the cooling water discharged from the cooling water channel flows along the one-way channel to the water outlet; when the end water retaining ribs are disconnected from the water channel water retaining ribs, the cooling water discharged from the cooling water channel flows along the left and right sides of the cavity to the water outlet.

[0009] As a further improvement of the present invention, the bottom of the water cooling jacket is provided with an annular plane and a limiting surface, and the limiting surface is located at the center of the annular plane; the reducer housing is provided with a cylindrical surface, and the cylindrical surface is cooperated and connected with the limiting surface to realize the connection and fixation of the bottom of the water cooling jacket and the reducer housing.

[0010] As a further improvement of the present invention, the tolerance matching position between the water cooling jacket and the motor housing is welded and sealed.

[0011] As a further improvement of the present invention, the fitting connection between the cylindrical surface and the limiting surface is welded and sealed.

[0012] Compared with the prior art, the advantages of the present invention are:

[0013] The water-cooled motor integrated housing of the utility model is realized by pressing the water-cooling jacket into the inner cavity of the motor housing, the water-cooling jacket and the motor housing are matched through the mounting holes, one end of the water-cooling jacket is fixed to the motor housing with a certain tolerance, and the other end is fixed to the reducer housing with a certain tolerance, thus realizing the installation and fixation of the cooling water jacket and forming the water-cooled motor integrated housing; when the water-cooling jacket is installed and fixed, the bottom of the water-cooling jacket and the outer periphery of the reducer housing form a closed cavity, which is connected with the cooling water channel, and the cavity also forms a part of the cooling water channel, which is equivalent to extending the length of the cooling water channel, and realizing that the cooling water in the cavity participates in the cooling cycle, thereby increasing the contact area between the cooling water and the end of the water-cooling jacket, having a high cooling water resource utilization rate and a good heat exchange effect, and at the same time eliminating the problem of cooling water stagnation caused by the dead water zone. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structural principle of the water-cooled motor integrated housing in a specific embodiment of the present utility model;

[0015] Figure 2 This is one of the schematic diagrams of the structural principle of the water cooling jacket in a specific embodiment of the present utility model;

[0016] Figure 3 This is the second schematic diagram of the structural principle of the water cooling jacket in a specific embodiment of the present utility model;

[0017] Figure 4 This is a schematic diagram of the welding position of the water cooling jacket in a specific embodiment of the present utility model;

[0018] Legend: 1. Water cooling jacket; 101. Water inlet; 102. Cooling water channel; 103. Cavity; 104. Water outlet; 105. End water retaining rib; 106. Water channel water retaining rib; 107. Limiting surface; 108. Annular plane; 2. Motor housing; 201. Reducer housing; 202. Cylindrical surface. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the accompanying drawings and specific preferred embodiments, but the scope of protection of the present invention is not limited thereby.

[0020] In the description of the present invention, it should be understood that the terms "side", "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships 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, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0022] Example

[0023] like Figure 1 and Figure 2As shown, the water-cooled motor integrated housing of the present invention includes a water-cooling jacket 1 and a motor housing 2. An integrally formed reducer housing 201 is provided at the bottom of the motor housing 2. The outer circumference of the water-cooling jacket 1 is provided with a cooling water channel 102 that spirally surrounds the circumference. The spiral cooling water channel 102 can slow down the change in the direction of water flow, reduce the flow resistance of the cooling water, and improve the heat exchange performance of the water-cooling jacket 1. A water inlet 101 and a water outlet 104 are provided at both ends of the cooling water channel 102 respectively; the water-cooling jacket 1 is pressed into the cavity of the motor housing 2, and water inlet and outlet interfaces corresponding to the water inlet 101 and the water outlet 104 are provided on the side of the motor housing 2 to enable cooling water to enter and exit the water-cooling jacket 1. As shown Figure 4 As shown in , at the top of the water-cooling jacket 1, the outer diameter of the water-cooling jacket 1 and the inner hole of the motor housing 2 are fixed with a certain tolerance, and the tolerance fit between the water-cooling jacket 1 and the motor housing 2 is welded and sealed; at the bottom of the water-cooling jacket 1, the water-cooling jacket 1 and the reducer housing 201 are fixed with a certain fit, and the tolerance fit between the water-cooling jacket 1 and the reducer housing 201 is welded and sealed to achieve the integration of the water-cooling jacket 1 and the motor housing 2, while also preventing the cooling water in the water-cooling jacket 1 from leaking and affecting the normal operation of the motor. When the water-cooling jacket 1 is installed and fixed, a closed annular structure cavity 103 is formed on the outer periphery of the reducer housing 201, and the cavity 103 is connected to the cooling water channel 102. The cooling water input from the water inlet 101 enters the cooling water channel 102, flows through the cavity 103, and is then discharged from the water outlet 104.

[0024] In this embodiment, the cooling water jacket is installed and fixed by fixing one end of the water-cooling jacket 1 to the motor housing 2 with a tolerance fit, and fixing the other end to the reducer housing 201 with a tolerance fit, thereby forming a water-cooled motor integrated housing. When the water-cooling jacket 1 is installed and fixed, a closed cavity 103 is formed between the bottom of the water-cooling jacket 1 and the outer periphery of the reducer housing 201. This cavity 103 is connected to the cooling water channel 102 and forms a part of the cooling water channel 102, which is equivalent to extending the length of the cooling water channel 102. The cooling water in the cavity 103 is also involved in the cooling cycle, increasing the contact area between the cooling water and the end of the water-cooling jacket 1. This improves the cooling water resource utilization rate and the heat exchange effect, while eliminating the problem of cooling water stagnation caused by dead water areas.

[0025] like Figure 2As shown, the bottom of the water-cooling jacket 1 is provided with an end water retaining rib 105 and a water channel water retaining rib 106. The end water retaining rib 105 is close to the water outlet 104, and the water channel water retaining rib 106 is located at the end of the cooling water channel 102 and close to the end water retaining rib 105. When the end water retaining rib 105 is connected to the water channel water retaining rib 106, the cavity 103 is connected to the cooling water channel 102 to form a one-way channel. The cooling water discharged from the cooling water channel 102 flows along the one-way channel to the water outlet 104 and then out of the water-cooling jacket 1. It can be understood that in order to achieve one-way communication between the cavity 103 and the cooling water channel 102, a water retaining rib is also provided at a corresponding position of the motor housing 2 to cooperate with the end water retaining rib 105 and the water channel water retaining rib 106.

[0026] like Figure 1 and Figure 2 As shown, the bottom of the water-cooling jacket 1 is provided with an annular plane 108 and a limiting surface 107. The limiting surface 107 is located at the center of the annular plane 108, and the end water retaining rib 105 is located on one side of the annular plane 108. The center of the water-cooling jacket 1 is a cylindrical cavity to facilitate the installation of the reducer bearing. The inner side of the reducer housing 201 is provided with a cylindrical surface 202, which is fixed to the limiting surface 107 using a tolerance fit. The annular plane 108, the outer side of the annular plane 108, and the inner side of the reducer housing 201 enclose an annular cavity 103.

[0027] Furthermore, the fitting connection between the cylindrical surface 202 and the limiting surface 107 is welded and sealed to achieve water channel sealing.

[0028] like Figure 3 As shown, in other embodiments, the end water retaining ribs 105 may be omitted. This is equivalent to when the end water retaining ribs 105 are disconnected from the water channel water retaining ribs 106, the cooling water discharged from the cooling water channel 102 flows along the left and right sides of the cavity 103 to the water outlet 104, and the cooling water in the cavity 103 can also be circulated.

[0029] In this embodiment, the vehicle circulating cooling water enters from the water inlet 101 of the water cooling jacket 1, flows along the spiral cooling water channel 102, and Figure 1 The water flows in the direction indicated by the middle arrow, entering the cavity 103 formed by the bottom of the water-cooling jacket 1 and the motor housing 2. End retaining ribs 105 connect to waterway retaining ribs 106, forming a circular, one-way channel in the cavity 103. Cooling water entering the cavity 103 along the cooling water channel 102 flows along the annular, one-way channel to the water outlet 104. By locating the cooling water outlet 104 in the dead water zone formed by the water-cooling jacket 1 and the motor housing 2, the cooling water effectively cools the motor.

[0030] In this embodiment, the dead water area (cavity 3) formed by the bottom end surface of the water-cooling jacket 1 and the motor housing 2 is supplemented as an extension of the cooling water channel 102, so that the cooling water in the dead water area can participate in the cooling water circulation of the water-cooling jacket 1, thereby eliminating the stagnation of cooling water caused by the dead water area and avoiding unnecessary occupation of cooling water resources of the entire vehicle. At the same time, the contact area of ​​the cooling water flowing through the water-cooling jacket 1 is increased, which can better take away the heat transferred from the motor to the water-cooling jacket 1 and improve the heat exchange performance of the water-cooling jacket 1.

[0031] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A water-cooled motor integrated housing, characterized in that: The invention comprises a water cooling jacket (1) and a motor housing (2), wherein the bottom of the motor housing (2) is provided with an integrally formed reducer housing (201), the outer circumference of the water cooling jacket (1) is provided with a cooling water channel (102) spirally surrounding the circumference, and the two ends of the cooling water channel (102) are respectively provided with a water inlet (101) and a water outlet (104); the water cooling jacket (1) is press-fitted into the cavity of the motor housing (2), and one end of the water cooling jacket (1) is in contact with the motor housing (2). The outer shell (2) is fixed by tolerance fitting, and the other end of the water cooling jacket (1) is fixed to the reducer housing (201) by tolerance fitting, and the bottom of the water cooling jacket (1) and the outer periphery of the reducer housing (201) form a closed cavity (103), and the cavity (103) is communicated with the cooling water channel (102). The cooling water input from the water inlet (101) enters the cooling water channel (102), flows through the cavity (103), and is then discharged from the water outlet (104).

2. The water-cooled motor integrated housing according to claim 1, characterized in that: The bottom of the water-cooling jacket (1) is provided with an end water retaining rib (105) and a water channel water retaining rib (106), wherein the end water retaining rib (105) is close to the water outlet (104), and the water channel water retaining rib (106) is located at the end of the cooling water channel (102) and close to the end water retaining rib (105); when the end water retaining rib (105) is connected to the water channel water retaining rib (106), the cavity (103) is connected to the cooling water channel (102) to form a one-way channel, and the cooling water discharged from the cooling water channel (102) flows along the one-way channel to the water outlet (104); when the end water retaining rib (105) is disconnected from the water channel water retaining rib (106), the cooling water discharged from the cooling water channel (102) flows along the left and right sides of the cavity (103) to the water outlet (104).

3. The water-cooled motor integrated housing according to claim 2, characterized in that: The bottom of the water-cooling jacket (1) is provided with an annular plane (108) and a limiting surface (107), and the limiting surface (107) is located at the center of the annular plane (108); the reducer housing (201) is provided with a cylindrical surface (202), and the cylindrical surface (202) is connected in a cooperative manner with the limiting surface (107) to achieve the connection and fixation between the bottom of the water-cooling jacket (1) and the reducer housing (201).

4. The water-cooled motor integrated housing according to claim 3, characterized in that: The matching connection between the cylindrical surface (202) and the limiting surface (107) is welded and sealed.

5. The water-cooled motor integrated housing according to any one of claims 1 to 4, characterized in that: The tolerance matching position between the water cooling jacket (1) and the motor housing (2) is welded and sealed.

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