Cooling device and integrated motor

Abstract

The utility model discloses a cooling device and an integrated motor, the cooling device is used for cooling a motor rotor, the cooling device comprises a mounting seat and an oil pipe which are fixedly connected, the cooling device can be mounted on a shell of the motor through the mounting seat, and an included angle is formed between the axial direction of the oil pipe and the axial direction of a rotor shaft of the motor. The cooling device can be mounted outside the rotor shaft through the mounting seat without being mounted inside the rotor shaft, so that the rotating process of the motor rotor is not influenced by the cooling device, the mounting requirement is reduced, the mounting difficulty of the cooling device is reduced, and the mounting efficiency is improved; the end, away from the mounting base, of the oil pipe is provided with a bottom face, the oil inlet hole and the oil spraying hole are both formed in the surface of the oil pipe, the oil inlet hole communicates with the oil inlet way, the oil spraying hole communicates with an inner cavity of a rotor shaft of the motor, and the oil pipe communicates with the oil inlet hole and the oil spraying hole. After flowing through the oil pipe, the oil is sprayed into the inner cavity of the rotor shaft from the outside of the rotor shaft through the oil spraying holes, so that the motor rotor is cooled.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, and more particularly, to a cooling device and an integrated electric machine. BACKGROUND

[0002] In the existing double-motor cooling structure, the cooling oil pipe is usually inserted into the inner cavity of the motor rotor shaft along the axial direction of the motor rotor shaft to spray oil into the inner cavity of the motor rotor shaft for cooling. Since the cooling oil pipe needs to be installed in the inner cavity of the rotor shaft, the installation requirements for the cooling oil pipe are high in order to ensure the stable operation of the motor rotor, which results in low installation efficiency.

[0003] To sum up, how to reduce the installation difficulty of the cooling device to improve the installation efficiency is a problem to be solved by the technical personnel in the field. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the purpose of the present application is to provide a cooling device and an integrated electric machine, which can reduce the installation difficulty of the cooling device to improve the installation efficiency.

[0005] In order to achieve the above purpose, the present application provides the following technical solutions:

[0006] A cooling device comprises a mounting seat, an oil inlet hole, an oil pipe and an oil injection hole. The mounting seat is used for mounting on the shell of an electric machine. The oil pipe is fixedly connected with the mounting seat, and the axial direction of the oil pipe has an included angle with the axial direction of the rotor shaft of the electric machine. The oil pipe is provided with a bottom surface at the end away from the mounting seat. The oil inlet hole and the oil injection hole are both formed on the surface of the oil pipe. The oil inlet hole is used for connecting an oil inlet path, and the oil injection hole is used for connecting the inner cavity of the rotor shaft of the electric machine. The oil pipe connects the oil inlet hole and the oil injection hole.

[0007] In some embodiments, the oil pipe is used for mounting between a first electric machine and a second electric machine. The first electric machine comprises a first rotor shaft inner cavity, and the second electric machine comprises a second rotor shaft inner cavity. The oil inlet hole comprises a first oil inlet hole and a second oil inlet hole. The first oil inlet hole and the second oil inlet hole are both formed on the circumferential side surface of the oil pipe, and the first oil inlet hole and the second oil inlet hole are both used for connecting the oil inlet path. The oil injection hole comprises a first oil injection hole and a second oil injection hole. The first oil injection hole and the second oil injection hole are both formed on the circumferential side surface of the oil pipe, and the first oil injection hole is used for connecting the first rotor shaft inner cavity, and the second oil injection hole is used for connecting the second rotor shaft inner cavity.

[0008] In some embodiments, the axial direction of the first oil inlet hole has an included angle with the axial direction of the oil inlet path.

[0009] And / or, the axial direction of the second oil inlet hole has an included angle with the axial direction of the oil inlet path.

[0010] In some embodiments, the first oil injection hole has an angle between its axial direction and the axial direction of the first rotor shaft inner cavity.

[0011] In some embodiments, the second oil injection hole has an angle between its axial direction and the axial direction of the second rotor shaft inner cavity.

[0012] In some embodiments, the first sealing structure is located on the bottom surface of the mounting seat, and the first sealing structure is used to seal the mounting seat and the shell; the second sealing structure is sleeved on the oil pipe, and the second sealing structure is used to seal the oil pipe and the shell; the oil inlet hole is located between the first sealing structure and the second sealing structure.

[0013] In some embodiments, a third oil injection hole is further included, which is opened on the oil pipe, and the oil injected by the third oil injection hole is used to lubricate the bearing of the rotor shaft.

[0014] In some embodiments, the third oil injection hole is opened on the circumferential side surface of the oil pipe.

[0015] Alternatively, the third oil injection hole is opened on the bottom surface.

[0016] In some embodiments, the diameters of the first oil inlet hole, the second oil inlet hole, the first oil injection hole, the second oil injection hole are all larger than the diameter of the third oil injection hole.

[0017] In some embodiments, the mounting seat is provided with a mounting hole, and the mounting seat is fixedly connected with the shell through the mounting hole and a threaded fastener.

[0018] An integrated motor, comprising a shell, a first motor, a second motor, and a cooling device as described above.

[0019] The cooling device provided by the application is used for cooling a motor rotor, and comprises a fixedly connected mounting base and an oil pipe. The cooling device can be mounted on the shell of the motor through the mounting base, so that the cooling device can be mounted and dismounted from the motor as a single device, which is convenient for maintenance. The axial direction of the oil pipe and the axial direction of the rotor shaft of the motor form an angle, so that the cooling device can be mounted outside the rotor shaft through the mounting base, without the need of being mounted inside the rotor shaft, so that the rotation of the motor rotor is not affected by the cooling device, thereby reducing the installation requirements, reducing the installation difficulty of the cooling device, and improving the installation efficiency. The end of the oil pipe away from the mounting base is provided with a bottom surface. The oil inlet hole and the oil injection hole are both arranged on the surface of the oil pipe. The oil inlet hole is connected with an oil inlet channel, and the oil injection hole is connected with the inner cavity of the rotor shaft of the motor. The oil pipe is connected with the oil inlet hole and the oil injection hole. In this way, the cooling oil enters the oil pipe through the oil inlet hole, and then flows through the oil pipe and is injected into the inner cavity of the rotor shaft from the outside of the rotor shaft through the oil injection hole, so that the motor rotor is cooled. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of the provided drawings.

[0021] Figure 1 The structural schematic diagram of the cooling device provided by the embodiment of the present application is shown in the figure.

[0022] Figure 2 The schematic diagram of the cooling device provided by the embodiment of the present application installed in the integrated motor is shown in the figure.

[0023] Explanation of reference signs:

[0024] 100 - shell, 110 - oil inlet channel, 120 - first motor, 121 - first rotor shaft inner cavity, 130 - second motor, 131 - second rotor shaft inner cavity, 140 - first bearing, 150 - second bearing, 160 - mounting cavity;

[0025] 210 - mounting base, 211 - mounting hole, 220 - first oil inlet hole, 230 - second oil inlet hole, 240 - oil pipe, 241 - bottom surface, 250 - first sealing structure, 260 - second sealing structure, 270 - first oil injection hole, 280 - second oil injection hole, 290 - third oil injection hole. DETAILED DESCRIPTION

[0026] With reference to the drawings and the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0027] With reference to the drawings and the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. The terms used in the following embodiments are only for the purpose of describing the specific embodiments, and are not intended to be limiting to the present application. As used in the specification and the appended claims of the present application, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “one or more” as used in the embodiments of the present application means one, two or more than two; “and / or” describes the association relationship of the associated objects, which means that there can be three relationships; for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone, wherein A and B can be singular or plural. The character “ / ” generally represents an “or” relationship between the associated objects.

[0028] In the present specification, the reference to “one embodiment” or “some embodiments” means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Therefore, the statements “in one embodiment”, “in some embodiments”, “in other some embodiments”, “in yet some embodiments” and the like appearing in various places in the specification are not necessarily all referring to the same embodiment, but mean “one or more but not all embodiments”, unless otherwise specifically noted. The terms “include”, “contain”, “have” and their variants mean “including but not limited to”, unless otherwise specifically noted.

[0029] The plurality of embodiments of the present application refers to more than or equal to two. It should be noted that in the description of the embodiments of the present application, the terms “first”, “second” and the like are only used for distinguishing the purpose of description, and cannot be understood as indicating or implying relative importance, nor can be understood as indicating or implying order.

[0030] The “parallel” and “perpendicular” referred to in the present application are “substantially parallel” and “substantially perpendicular” in actual operation. “Substantially parallel” can be understood as parallel with a certain error, and similarly, “substantially perpendicular” can be understood as perpendicular with a certain error.

[0031] As Figures 1-2As shown, the cooling device provided by the embodiment of the present application comprises a mounting seat 210, an oil inlet hole, an oil pipe 240 and an oil injection hole. The mounting seat 210 is used to be mounted on the shell 100 of the motor, so that the cooling device can be mounted and dismounted with the motor as a single device, facilitating the maintenance of the cooling device.

[0032] In actual cases, for example, Figure 1 As shown, the mounting seat 210 is provided with a mounting hole 211, so that the mounting seat 210 can be fixedly connected with the shell 100 through the mounting hole 211 and a threaded fastener, ensuring the stability of the installation of the cooling device.

[0033] The oil pipe 240 is fixedly connected with the mounting seat 210, and the axial direction of the oil pipe 240 has an included angle with the axial direction of the rotor shaft of the motor. In this way, the cooling device can be installed outside the rotor shaft, without being installed inside the rotor shaft, so that the rotation of the motor rotor will not be affected by the cooling device, thereby reducing the installation requirements, reducing the installation difficulty of the cooling device and improving the installation efficiency.

[0034] The axial direction of the oil pipe 240 can be an acute angle, an obtuse angle or a right angle with the axial direction of the motor rotor shaft. In the cooling device provided by the embodiment of the present application, in order to improve the convenience of the installation of the cooling device, as shown in the figure, Figure 2 The axial direction of the oil pipe 240 is perpendicular to the axial direction of the motor rotor shaft.

[0035] The oil pipe 240 is provided with a bottom surface 241 at one end away from the mounting seat 210. The oil inlet hole and the oil injection hole are both provided on the surface of the oil pipe 240, and the oil inlet hole is communicated with the oil inlet channel 110, and the oil injection hole is communicated with the inner cavity of the rotor shaft of the motor. The oil pipe 240 is communicated with the oil inlet hole and the oil injection hole. In this way, the cooling oil of the oil inlet channel 110 enters the inside of the oil pipe 240 through the oil inlet hole, flows through the oil pipe 240 and is sprayed from the outside of the rotor shaft to the inner cavity of the rotor shaft through the oil injection hole, so as to achieve the cooling of the motor rotor.

[0036] In the double-motor device, in order to simultaneously cool the rotors of the two motors, the oil pipe 240 is installed between the first motor 120 and the second motor 130. Specifically, as shown in the figure, Figure 2 The first motor 120 and the second motor 130 are integrated in the shell 100, and the first motor 120 and the second motor 130 are distributed towards each other. The oil pipe 240 is located between the non-output end of the first motor 120 and the non-output end of the second motor 130, so as to ensure the normal operation of the first motor 120 and the second motor 130, and to achieve the cooling of the rotors of the double motors through one cooling device, thereby improving the installation efficiency and saving the installation space.

[0037] In order to ensure the installation position of the cooling device, as shown in the figure, Figure 2As shown, the housing 100 is provided with a mounting cavity 160, so that the oil pipe 240 can be mounted in the housing 100 along the mounting cavity 160, and the oil pipe 240 can be positioned in the mounting cavity 160 during the installation of the cooling device, so as to ensure the installation position of the cooling device, so that the oil inlet hole and the oil injection hole can correspond to the communication position, and the cooling effect of the cooling device is ensured.

[0038] As shown, Figures 1-2 The oil inlet hole includes a first oil inlet hole 220 and a second oil inlet hole 230, both of which are provided on the circumferential side of the oil pipe 240, and both of which can communicate with the oil inlet channel 110, so that the cooling oil can enter the oil pipe 240 through the first oil inlet hole 220 and the second oil inlet hole 230, and the oil amount of the cooling oil entering the oil pipe 240 is ensured to ensure the cooling effect of the rotor.

[0039] In some embodiments, the first oil inlet hole 220 has an included angle with the axial direction of the oil inlet channel 110, which can be an acute angle or an obtuse angle; the second oil inlet hole 230 has an included angle with the axial direction of the oil inlet channel 110, which can be an acute angle or an obtuse angle. In order to further ensure the oil amount entering the oil pipe 240, as shown, Figure 2 The axial direction of the first oil inlet hole 220 and the axial direction of the second oil inlet hole 230 are parallel to the axial direction of the oil inlet channel 110, which increases the area of the first oil inlet hole 220 and the second oil inlet hole 230 for the cooling oil to enter the oil pipe 240 along the axial direction of the oil inlet channel 110, further ensures the oil amount entering the oil pipe 240, and ensures the cooling effect of the rotor.

[0040] In other embodiments, the axial direction of one of the first oil inlet hole 220 and the second oil inlet hole 230 can be parallel to the axial direction of the oil inlet channel 110, which is not limited in the embodiments of the present application.

[0041] As shown, Figure 2 The first motor 120 includes a first rotor shaft inner cavity 121, the second motor 130 includes a second rotor shaft inner cavity 131, the oil injection hole includes a first oil injection hole 270 and a second oil injection hole 280, both of which are provided on the circumferential side of the oil pipe 240, the first oil injection hole 270 can communicate with the first rotor shaft inner cavity 121, so that the cooling oil can be injected into the first rotor shaft inner cavity 121; the second oil injection hole 280 can communicate with the second rotor shaft inner cavity 131, so that the cooling oil can be injected into the second rotor shaft inner cavity 131, which realizes the cooling of the two rotors in the double motor device by one cooling device, and saves the installation space.

[0042] Since the first oil injection hole 270 sprays oil cooling from the outside of the rotor shaft to the first rotor shaft inner cavity 121, in order to ensure the cooling effect, the first oil injection hole 270 has an angle between the axial direction and the axial direction of the first rotor shaft inner cavity 121, so that the cooling oil sprayed from the first oil injection hole 270 can be sprayed to the circumferential inner wall of the first rotor shaft inner cavity 121, and the cooling effect of the rotor is ensured.

[0043] In some embodiments, the angle between the axial direction of the first oil injection hole 270 and the axial direction of the first rotor shaft inner cavity 121 can be selected to be 0-90° (not including endpoints), and in actual cases, the opening angle of the first oil injection hole 270 can be set according to cooling requirements, and the present application embodiment does not limit this.

[0044] Similarly, since the second oil injection hole 280 sprays oil cooling from the outside of the rotor shaft to the second rotor shaft inner cavity 131, in order to ensure the cooling effect, the second oil injection hole 280 has an angle between the axial direction and the axial direction of the second rotor shaft inner cavity 131, so that the cooling oil sprayed from the second oil injection hole 280 can be sprayed to the circumferential inner wall of the second rotor shaft inner cavity 131, and the cooling effect of the rotor is ensured.

[0045] In some embodiments, the angle between the axial direction of the second oil injection hole 280 and the axial direction of the second rotor shaft inner cavity 131 can be selected to be 0-90° (not including endpoints), and in actual cases, the opening angle of the second oil injection hole 280 can be set according to cooling requirements, and the present application embodiment does not limit this.

[0046] As shown in Figure 2 Since the mounting seat 210 is fixedly connected to the outside of the shell 100 by a threaded fastener, and the oil pipe 240 is communicated with the oil inlet passage 110 through the first oil inlet hole 220 and the second oil inlet hole 230, in order to ensure the sealing of the oil passage of the cooling oil, the cooling device provided by the present application embodiment further comprises a first sealing structure 250 and a second sealing structure 260.

[0047] As shown in Figures 1-2 The first sealing structure 250 is located on the bottom surface of the mounting seat 210, and the first sealing structure 250 can seal the mounting seat 210 and the shell 100; the second sealing structure 260 is sleeved on the oil pipe 240, and the second sealing structure 260 can seal the oil pipe 240 and the shell 100, and the first oil inlet hole 220 and the second oil inlet hole 230 are located between the first sealing structure 250 and the second sealing structure 260, so that the sealing of the cooling oil during the process of entering the oil pipe 240 through the first oil inlet hole 220 and the second oil inlet hole 230 from the oil inlet passage 110 is ensured, the sealing operation of the cooling device is ensured, and the cooling effect of the rotor is further ensured.

[0048] In some embodiments, the first sealing structure 250 can be a sealing ring, a sealing gasket, etc., and the second sealing structure 260 can also be a sealing ring, a sealing gasket, etc., which are not limited in the embodiments of the present application.

[0049] In the cooling device provided by the embodiments of the present application, the third oil injection hole 290 is further arranged on the oil pipe 240, and the oil injected by the third oil injection hole 290 can lubricate and cool the bearing of the rotor shaft, so as to ensure the stable operation of the bearing and the stable operation of the motor rotor.

[0050] As shown in FIG. 1, Figure 2 The first bearing 140 is arranged on the non-output end of the first motor 120 to support the rotation of the rotor, and the second bearing 150 is arranged on the non-output end of the second motor 130 to support the rotation of the rotor. After the cooling oil is injected out of the third oil injection hole 290, the cooling oil flows to the first bearing 140 and the second bearing 150 through the installation cavity 160, so as to lubricate and cool the first bearing 140 and the second bearing 150, and ensure the stable operation of the first bearing 140 and the second bearing 150.

[0051] In actual situations, in order to ensure that the first bearing 140 and the second bearing 150 can be lubricated and cooled, as shown in FIG. 1, Figure 2 After the cooling device is installed in the shell 100, the length of the oil pipe 240 does not exceed the bottom end of the first bearing 140 and the second bearing 150 along the axial direction of the oil pipe 240, so that the cooling oil injected out of the third oil injection hole 290 can flow to the first bearing 140 and the second bearing 150.

[0052] In some embodiments, as shown in FIG. 1, Figures 1-2 The third oil injection hole 290 is arranged on the circumferential side of the oil pipe 240, and the third oil injection hole 290 is closer to the bottom surface 241 than the first oil injection hole 270 and the second oil injection hole 280. In this way, the cooling oil is injected out of the third oil injection hole 290 after being cooled by the first oil injection hole 270 and the second oil injection hole 280, so as to ensure the oil injection amount of the first oil injection hole 270 and the second oil injection hole 280 and ensure the cooling effect of the rotor.

[0053] In other embodiments, the third oil injection hole 290 can be farther away from the bottom surface 241 than the first oil injection hole 270 and the second oil injection hole 280, which are not limited in the embodiments of the present application.

[0054] As shown in FIG. 1, Figure 1As shown, the third oil injection hole 290 is one, and the axial direction of the third oil injection hole 290 has an angle with the axial direction of the first oil injection hole 270 and the axial direction of the second oil injection hole 280, so that the cooling oil injected through the third oil injection hole 290 can reach the first bearing 140 and the second bearing 150 on both sides, ensuring that the first bearing 140 and the second bearing 150 can be lubricated and cooled.

[0055] In other embodiments, the third oil injection hole 290 can be two, and the two third oil injection holes 290 can respectively inject cooling oil to the first bearing 140 and the second bearing 150.

[0056] In other embodiments, the third oil injection hole 290 is opened on the bottom surface 241, ensuring that the first bearing 140 and the second bearing 150 can be lubricated and cooled.

[0057] In order to ensure the cooling effect of the rotor, as shown, Figure 1 As shown, the hole diameters of the first oil inlet hole 220, the second oil inlet hole 230, the first oil injection hole 270 and the second oil injection hole 280 are greater than the hole diameter of the third oil injection hole 290, so as to ensure the amount of cooling oil entering the oil pipe 240 and the amount of cooling oil injected into the first rotor shaft inner cavity 121 and the second rotor shaft inner cavity 131, ensuring the cooling effect of the rotor.

[0058] In actual situations, the hole diameters of the first oil inlet hole 220, the second oil inlet hole 230, the first oil injection hole 270, the second oil injection hole 280 and the third oil injection hole 290 can be opened according to actual needs, and the embodiments of the present application do not limit this.

[0059] In actual situations, after the cooling oil passes through the first rotor shaft inner cavity 121, the second rotor shaft inner cavity 131, the first bearing 140 and the second bearing 150, it will enter the oil storage tank through the recovery oil path, and then re-enter the oil inlet path 110 through the cooling and filtering device (not shown in the figure), so as to realize continuous cooling during the operation of the rotor, ensure the stable operation of the rotor, and the specific structure will not be described here.

[0060] The cooling device provided by the embodiment of the present application is used for installing the oil pipe 240 into the shell 100 along the installation cavity 160 and installing the cooling device on the shell 100 through the mounting seat 210, and in the process of cooling the rotor, the cooling oil enters the oil pipe 240 through the first oil inlet hole 220 and the second oil inlet hole 230 from the oil inlet channel 110, and after flowing through the oil pipe 240, the cooling oil is sprayed to the first rotor shaft inner cavity 121 and the second rotor shaft inner cavity 131 through the first oil outlet hole 270 and the second oil outlet hole 280 respectively, so as to cool the rotor of the first motor 120 and the rotor of the second motor 130. By installing the cooling device between the first motor 120 and the second motor 130, the installation space is saved, the installation difficulty of the cooling device is reduced, and the installation efficiency is improved.

[0061] The embodiment of the present application also provides an integrated motor, which comprises the shell 100, the first motor 120, the second motor 130 and the cooling device in the above embodiment.

[0062] Since the cooling device has the above technical effects, the integrated motor comprising the cooling device also has corresponding technical effects, which will not be described herein again.

[0063] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Cooling device, characterized in that include: Mounting base (210), oil inlet, oil pipe (240) and oil injection hole; The mounting base (210) is used to be mounted on the housing (100) of the motor; The oil pipe (240) is fixedly connected to the mounting base (210), and the axial direction of the oil pipe (240) is at an angle to the axial direction of the motor rotor shaft; The oil pipe (240) has a bottom surface (241) at one end away from the mounting base (210), and the oil inlet and the oil injection hole are both opened on the surface of the oil pipe (240); The oil inlet hole is used to connect the oil inlet passage (110), the oil injection hole is used to connect the inner cavity of the rotor shaft of the motor, and the oil pipe (240) connects the oil inlet hole and the oil injection hole.

2. Cooling device according to claim 1, characterized in that The oil pipe (240) is used to be installed between the first motor (120) and the second motor (130). The first motor (120) includes a first rotor shaft cavity (121), and the second motor (130) includes a second rotor shaft cavity (131). The oil inlet includes a first oil inlet (220) and a second oil inlet (230). Both the first oil inlet (220) and the second oil inlet (230) are opened on the circumferential side of the oil pipe (240), and both the first oil inlet (220) and the second oil inlet (230) are used to connect the oil inlet passage (110). The oil injection holes include a first oil injection hole (270) and a second oil injection hole (280). Both the first oil injection hole (270) and the second oil injection hole (280) are opened on the circumferential side of the oil pipe (240). The first oil injection hole (270) is used to connect to the inner cavity (121) of the first rotor shaft, and the second oil injection hole (280) is used to connect to the inner cavity (131) of the second rotor shaft.

3. Cooling device according to claim 2, characterized in that The axial direction of the first oil inlet hole (220) is at an angle to the axial direction of the oil inlet passage (110); And / or, the axial direction of the second oil inlet (230) is at an angle to the axial direction of the oil inlet passage (110).

4. Cooling device according to claim 2, characterized in that The axial direction of the first oil injection hole (270) is at an angle to the axial direction of the inner cavity of the first rotor shaft (121); And / or, the axial direction of the second oil injection hole (280) is at an angle to the axial direction of the inner cavity of the second rotor shaft (131).

5. The cooling device of claim 1, wherein It also includes a first sealing structure (250) and a second sealing structure (260); The first sealing structure (250) is located on the bottom surface of the mounting base (210), and the first sealing structure (250) is used to seal the mounting base (210) and the housing (100). The second sealing structure (260) is fitted over the oil pipe (240), and the second sealing structure (260) is used to seal the oil pipe (240) and the housing (100). The oil inlet is located between the first sealing structure (250) and the second sealing structure (260).

6. The cooling device of claim 2, wherein It also includes a third oil injection hole (290), which is opened in the oil pipe (240), and the oil injected from the third oil injection hole (290) is used to lubricate the bearing of the rotor shaft.

7. Cooling device according to claim 6, characterized in that The third oil injection hole (290) is arranged on the circumferential side of the oil pipe (240); Alternatively, the third oil injection hole (290) is arranged on the bottom surface (241).

8. Cooling device according to claim 6, characterized in that The first oil inlet hole (220), the second oil inlet hole (230), the first oil injection hole (270), the second oil injection hole (280) and the third oil injection hole (290) are arranged on the bottom surface (241) of the oil pipe (240).

9. Cooling device according to any of claims 1-8, characterized in that, The mounting seat (210) is provided with a mounting hole (211), and the mounting seat (210) is fixedly connected with the shell (100) through the mounting hole (211) and a threaded fastener.

10. An integrated motor characterized by, Comprising: The shell (100), the first motor (120), the second motor (130), and the cooling device according to any one of claims 1-9.

Images