Motor assembly of integrated cooling system

Abstract

The utility model discloses a motor assembly of an integrated cooling system, which comprises a stator, a power part, a cooling part and a shell, the shell is a sealing shell on one side of a motor, a hidden oil passage is embedded in a thickness area of the shell, and an inlet and an outlet of the oil passage are respectively communicated with an inlet and an outlet of the stator to form a cooling loop. The cooling part and the power part are both arranged on a path of the cooling loop, and the power part is started to drive oil liquid to circularly flow in the cooling loop. The pipeline is embedded in the thickness area of the shell, so that oil in the stator can circulate in the external pipeline of the stator cavity, the power part provides oil driving force, high-temperature oil in the stator circularly flows in the cooling loop, and the high-temperature oil in the stator is cooled through the cooling function of the cooling part. At the same time, the hidden design of the oil passage can prevent the structure of the motor from being complicated, and improves the general scene of the motor.

Description

Technical Field

[0001] The utility model relates to the technical field of motor equipment, in particular to a motor assembly with an integrated cooling system. Background Art

[0002] During the operation of the motor, the oil in the stator absorbs heat and its temperature rises after long-term use. In the subsequent operation process, a large amount of heat generated by the stator winding is difficult to be discharged in time, and there is a risk that the stator winding overheats and affects the working performance and service life of the motor. Therefore, cooling the oil in the stator is one of the technical problems that must be solved during the operation of the motor. Currently, the common solution is to circulate the oil, replacing the high-temperature oil after heat absorption with low-temperature oil to continuously cool the stator winding. However, the external oil circulation pipeline and cooling device will increase the production and operation costs of the motor. At the same time, the complexity of the motor structure will lead to an increase in its overall structure, thus limiting its application environment due to volume reasons and reducing its general applicability.

[0003] Therefore, how to meet the cooling requirements of the motor stator and reduce the structural complexity of the motor is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a motor assembly with an integrated cooling system to meet the cooling requirements of the motor stator and reduce the structural complexity of the motor.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A motor assembly with an integrated cooling system includes a stator, a power unit, a cooling unit and a housing. The housing is a sealed shell on one side of the motor, and a hidden oil passage is recessed and opened in the thickness area of the housing. The inlet and outlet of the oil passage are respectively communicated with the inlet and outlet of the stator to form a cooling circuit. The cooling unit and the power unit are both arranged on the path of the cooling circuit, and the power unit starts to drive the oil to circulate in the cooling circuit.

[0007] Preferably, in the above motor assembly with an integrated cooling system, the oil passage at least includes an oil suction pipeline and an oil inlet pipeline. The stator includes a first oil inlet and a first oil outlet. The second oil inlet of the oil suction pipeline is communicated with the first oil outlet, the second oil outlet of the oil suction pipeline is communicated with the inlet of the cooling unit, the outlet of the cooling unit is communicated with the third oil inlet of the oil inlet pipeline, and the third oil outlet of the oil inlet pipeline is communicated with the first oil inlet;

[0008] The second oil inlet, the second oil outlet, the third oil inlet, the third oil outlet, and the inlet and outlet of the cooling part are all integrally arranged on the housing.

[0009] Preferably, in the motor assembly of the above integrated cooling system, a return oil pipeline is also communicatively opened on the oil supply pipeline to communicate with the oil suction pipeline, and a pressure relief part is arranged at the communication position between the oil supply pipeline and the return oil pipeline. The pressure relief part is normally closed and opens when the pressure in the oil supply pipeline reaches a preset pressure.

[0010] Preferably, in the motor assembly of the above integrated cooling system, the pressure relief part includes an oil bead, a spring, and an oil plug. The oil bead blocks the oil supply pipeline and bears the oil pressure in the oil supply pipeline. When the oil pressure in the oil supply pipeline reaches the preset pressure, the oil bead and the spring are compressed, the spring contracts, and the oil supply pipeline communicates with the return oil pipeline.

[0011] Preferably, in the motor assembly of the above integrated cooling system, the power part is a mechanical pump and includes a sealed cavity to access the cooling circuit. An internally meshing inner gear and outer gear are arranged in the sealed cavity. The inner gear is connected to the power shaft extending from the first power source to rotate synchronously, and the outer gear is driven by the inner gear to pump oil to circulate in the cooling circuit.

[0012] Preferably, in the motor assembly of the above integrated cooling system, an annular oil seal is arranged between the inner gear and the power shaft, and the outer gear is sealed with the cover plate structure through an annular gasket.

[0013] Preferably, in the motor assembly of the above integrated cooling system, the oil suction pipeline includes a first oil suction pipeline and a second oil suction pipeline arranged in parallel. The two ends of the first oil suction pipeline are respectively communicated with the first oil outlet and the sealed cavity of the mechanical pump, and the two ends of the second oil suction pipeline are respectively communicated with the inlet of the cooling part and the sealed cavity of the mechanical pump.

[0014] Preferably, in the motor assembly of the above integrated cooling system, the outer ring of the power shaft is connected to the inner ring of the inner gear through a spline.

[0015] Preferably, in the motor assembly of the above integrated cooling system, the cooling part is an oil cooler with a liquid cooling medium and is fixedly connected to the housing.

[0016] Preferably, in the motor assembly of the above integrated cooling system, a water inlet pipeline and a water inlet are further arranged on the housing. Cooling water is introduced into the water inlet pipeline, and the water inlet is arranged on the water inlet pipeline and is communicated with the cooling medium inlet of the cooling part.

[0017] As can be seen from the above technical solution, in the motor assembly with an integrated cooling system provided by the present utility model, an oil passage is recessed and provided in the thickness region of the housing. Due to the recessed setting of the oil passage, the outer shape structure of the housing will not change significantly, thus avoiding the complication of the housing structure. At the same time, the inlet and outlet of the oil passage on the housing are connected to the inlet and outlet of the cavity structure of the stator to form an oil cooling circuit, and a power part and a cooling part are provided on the cooling circuit. The high-temperature oil in the stator can flow out of the stator under the action of the power part, flow in the oil passage in the housing, and all pass through the cooling part for cooling, and then flow back into the stator for subsequent cooling of the stator operation. The above structure not only meets the cooling requirements during the continuous operation of the motor stator, but also the pipeline structure of the cooling system is located within the thickness range of the housing. While the outer shape structure of the housing does not change significantly, it undertakes the oil flow, and the complexity of the motor is reduced through an integrated design, thereby improving the generalization degree of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 FIG. is a schematic diagram of the overall structure of the motor assembly with an integrated cooling system provided by an embodiment of the present utility model;

[0020] Figure 2 is Figure 1 the assembly structure diagram of;

[0021] Figure 3 FIG. is a schematic diagram of the structure of the stator;

[0022] Figure 4 FIG. is a schematic diagram of the oil passage structure in the housing;

[0023] Figure 5 FIG. is a schematic diagram of the internal flow path structure after the top cover of the housing is hidden.

[0024] Among them, 10 - stator; 110 - first oil inlet; 120 - first oil outlet; 20 - power unit; 210 - internal gear; 220 - external gear; 230 - power shaft; 240 - oil seal; 250 - washer; 30 - cooling unit; 40 - housing; 410 - first oil suction pipeline; 4110 - second oil inlet; 420 - second oil suction pipeline; 4210 - second oil outlet; 430 - oil inlet pipeline; 4310 - third oil inlet; 4320 - third oil outlet; 440 - oil return pipeline; 4510 - oil bead; 4520 - spring; 4530 - oil plug; 460 - water inlet pipeline; 4610 - water inlet. Detailed implementation manners

[0025] The core of the present utility model lies in disclosing a motor assembly with an integrated cooling system to meet the cooling requirements of the motor stator and reduce the structural complexity of the motor.

[0026] In order to enable those skilled in the art to better understand the solution of the present utility model, the embodiments of the present utility model will be described below with reference to the accompanying drawings. In addition, the embodiments shown below do not impose any limitation on the content of the utility model recorded in the claims. Additionally, all the contents of the configurations shown in the following embodiments are not limited to those necessary for the solution of the utility model recorded in the claims.

[0027] As Figures 1-5 shown, the motor assembly with an integrated cooling system provided by the embodiment of the present utility model mainly includes a stator 10, a power unit 20, a cooling unit 30, and a housing 40. Among them, the housing 40 is a sealed housing structure on one side of the motor, which has a certain structural thickness. On this basis, a hidden oil passage is recessed and opened in the thickness area of the housing 40. It should be noted that the hidden structure here specifically refers to the specific structure of the oil passage that cannot be directly observed on both sides of the housing 40, and only the opening position of the oil passage can be observed.

[0028] Meanwhile, the inlet of the oil passage is communicated with the outlet of the cavity structure of the stator 10, and the outlet of the oil passage is communicated with the inlet of the cavity structure of the stator 10, so that the oil passage and the cavity structure of the stator 10 form a cooling circuit, and the oil in the stator 10 can circulate in the cooling circuit. On the basis of this structure, a cooling unit 30 and a power unit 20 are further arranged on the path of the cooling circuit. Among them, the power unit 20 is used to provide the circulating power of the oil during startup, so that the oil in the stator 10 can smoothly enter the oil passage in the housing 40, complete the circulation outside the stator 10, and then flow back into the stator 10. After the oil flows out of the stator 10 and before flowing back into the stator 10, the circulating process will also pass through the cooling unit 30. The cooling unit 30 can be a liquid cooling or air cooling device, so as to cool down all the high-temperature oil flowing out of the stator 10 and then flow back into the stator 10 for operation.

[0029] In this embodiment, the oil in the stator 10 has an external circuit and can circulate under the drive of the power unit 20. At the same time, the oil is cooled by the cooling unit 30 to meet the recycling requirements. The external circuits of the stator 10 are all arranged within the thickness range of the housing 40, so that the external shape structure of the housing 40 will not change. Only by designing the positions of the power unit 20 and the cooling unit 30 according to the motor structure can the cooling function of the oil in the stator 10 be realized, avoiding the problem that the structure of the motor is overly complicated due to the setting of the cooling function, enabling the motor to meet various application scenarios. At the same time, it should be noted that the power unit 20 can adopt structures such as a small motor or a motor, and can be hidden in the area between the housing 40 and the stator 10, and it will not have an obvious impact on the external shape structure of the electrode either. Therefore, only by adaptively installing the cooling unit 30 can the integrated setting of the cooling system in the motor assembly be satisfied.

[0030] For the motor assembly with an integrated cooling system provided by the embodiment of the present utility model, an oil passage is embedded and opened in the thickness area of the housing 40. Due to the embedded setting of the oil passage, the external shape structure of the housing 40 will not change significantly, thus avoiding the complication of the structure of the housing 40. At the same time, the inlet and outlet of the oil passage on the housing 40 are communicated with the inlet and outlet of the cavity structure of the stator 10 to form an oil cooling circuit, and the power unit 20 and the cooling unit 30 are arranged on the cooling circuit. The high-temperature oil in the stator 10 can flow out of the stator 10 under the action of the power unit 20, flow in the oil passage in the housing 40, and after being completely cooled by passing through the cooling unit 30, then flow back into the stator 10 for subsequent cooling of the operation of the stator 10. The above structure not only meets the cooling requirements of the motor stator 10 during its continuous operation. At the same time, the pipeline structure of the cooling system is all within the thickness range of the housing 40. The housing 40 undertakes the oil flow while its external shape structure does not change significantly. Through the integrated design, the complexity of the motor is reduced, and the generalization degree of the motor is improved.

[0031] Furthermore, in some embodiments of the present utility model, the oil passage at least includes an oil suction pipeline and an oil inlet pipeline 430, and the cavity structure of the stator 10 includes two openings, namely a first oil inlet 110 and a first oil outlet 120. Specifically, the oil suction pipeline includes a second oil inlet 4110 for communicating with the first oil outlet 120 to allow the oil in the stator 10 to flow out of the cavity structure of the stator 10. The second oil outlet 4210 of the oil suction pipeline is communicated with the inlet of the cooling part 30. Correspondingly, the outlet of the cooling part 30 is communicated with the third oil inlet 4310 of the oil inlet pipeline 430 to convey the cooled oil into the oil inlet pipeline 430. The third oil outlet 4320 of the oil inlet pipeline 430 is communicated with the first oil inlet 110 of the stator 10 to form a closed and sealed cooling loop. In the above cooling loop, when the power part 20 is started, the oil can flow out from the first oil outlet 120 of the stator 10 and stably flow in the external flow path of the stator 10. After being cooled by the cooling part 30, the oil then flows back into the stator 10 from the first oil inlet 110 to cool the stator 10. Moreover, the separate arrangement of the oil suction pipeline and the oil inlet pipeline 430 and the structure of realizing communication through the cooling part 30 also reduce the production difficulty of opening a through groove structure on the housing 40. At the same time, it should be noted that the second oil inlet 4110, the second oil outlet 4210, the third oil inlet 4310, the third oil outlet 4320 and the inlets and outlets of the cooling part 30 are all integrally arranged on the housing 40. Only the opening structure can be observed on the outer side of the housing 40. By docking the cooling part 30 with the corresponding opening on the housing 40, the construction of the entire cooling loop can be completed. At the same time, the structural design of the integration of the second oil inlet 4110, the second oil outlet 4210, the third oil inlet 4310, the third oil outlet 4320 and the inlets and outlets of the cooling part 30 on the housing 40 can also maintain the structural integrity and strength of the opening.

[0032] In order to further improve the fineness of the oil passage on the housing 40 to ensure the stability during the oil circulation process, in some embodiments of the present utility model, an oil return pipeline 440 is also communicatively connected to the oil inlet pipeline 430 to avoid problems such as oil leakage due to excessive oil in the oil inlet pipeline 430 or uneven oil entering the stator 10. The oil return pipeline 440 is connected to the oil suction pipeline so that the oil in the oil inlet pipeline 430 can flow back into the oil suction pipeline for re-circulation during oil return, thereby making the pressure in the stator 10 controllable. At the same time, in order to adjust the opening and closing of the oil return pipeline 440, a pressure relief part is provided at the connection position between the oil inlet pipeline 430 and the oil return pipeline 440. The pressure relief part can be a valve structure for an operator to detect the oil pressure in the oil inlet pipeline 430 and control the opening and closing manually or electrically. At the same time, the pressure relief part can also be a self-triggered structure after being sensed by a pressure sensor to achieve the function of self-regulation when the oil pressure in the oil inlet pipeline 430 is too high. Again, the pressure relief part can also be a mechanical structure triggered under certain pressure conditions. The purpose is to make the pressure relief part in a normally closed state to close the oil inlet pipeline 430 and the oil return pipeline 440 and open when the pressure in the oil inlet pipeline 430 reaches the preset pressure, so that the oil flows back to reduce the pressure in the oil inlet pipeline 430.

[0033] In a specific embodiment of the present utility model, in order to meet the pressure relief function of the pressure relief part while reducing its production cost and control cost, the pressure relief part at least includes an oil bead 4510, a spring 4520 and an oil plug 4530. Among them, the oil bead 4510 is located inside the oil inlet pipeline 430 when the pressure relief part is normally closed and blocks the oil inlet pipeline 430 to prevent oil leakage from the position of the oil bead 4510. One end of the spring 4520 is fixedly arranged on the oil plug 4530, and the other end is in contact connection with the oil bead 4510. When the oil bead 4510 blocks the oil inlet pipeline 430, it also bears the oil pressure in the oil inlet pipeline 430 and plays a certain role in oil pressure detection. The spring 4520 is a spring 4520 with a corresponding elastic modulus selected according to a preset pressure. When the oil pressure in the oil inlet pipeline 430 is less than the preset pressure, it props up the oil bead 4510 from one side of the oil bead 4510 to keep the oil inlet pipeline 430 and the oil return pipeline 440 closed. When the oil pressure in the oil inlet pipeline 430 reaches the preset pressure, the oil will compress the oil bead 4510 and the spring 4520. The spring 4520 contracts and the oil bead 4510 moves, and the oil inlet pipeline 430 is communicated with the oil return pipeline 440 to carry out the reflux of the oil. At the same time, when the oil in the oil inlet pipeline 430 returns below the preset pressure, the elastic force of the spring 4520 will push the oil bead 4510 to move again and block the oil inlet pipeline 430 and the oil return pipeline 440, so that all the oil in the oil inlet pipeline 430 can flow into the stator 10. The settings of the oil bead 4510, the spring 4520 and the oil plug 4530 not only have a simple structure and low cost, but also can realize the automatic closing and connection adjustment of the oil inlet pipeline 430 and the oil return pipeline 440 after selecting the spring 4520.

[0034] Further, in some embodiments of the present utility model, the power unit 20 is a mechanical pump and includes a closed cavity, which is also connected to the cooling circuit. The mechanical pump outputs power through a set of gear sets arranged in the sealed cavity, which specifically includes an inner gear 210 and an outer gear 220 that are meshed and matched. Among them, the inner gear 210 is connected to the power shaft 230 extending from the first power source to rotate synchronously with the power shaft 230 when the power shaft 230 rotates, and the outer gear 220 meshes with the inner gear 210 to drive the outer gear 220 to rotate through the inner gear 210. The pumped oil circulates in the cooling circuit. The mechanical gear structure not only makes the power output of the power unit 20 more stable, but also the structure of connecting the closed cavity to the cooling circuit enables the power unit 20 to occupy part of the housing 40 structure, further reducing the space occupied by the motor assembly.

[0035] It should be noted that since the power unit 20 has multiple moving parts and there is a greater risk of oil leakage during its movement, in the motor assembly provided in the embodiment of the present utility model, a ring-shaped oil seal 240 structure is further provided between the internal gear 210 and the power shaft 230 to maintain the sealing performance between the internal gear 210 and the power shaft 230. At the same time, the external gear 220 is sealed with the surrounding cover structure through a ring-shaped gasket 250 to seal from the inside and outside of the power unit 20, so as to prevent oil from seeping into the motor and affecting its normal operation.

[0036] Furthermore, in some embodiments of the present utility model, the oil suction pipeline specifically includes a first oil suction pipeline 410 and a second oil suction pipeline 420. Among them, the two ends of the first oil suction pipeline 410 are respectively connected to the first oil outlet 120 and the sealed cavity of the mechanical pump, while the two ends of the second oil suction pipeline 420 are respectively connected to the inlet of the cooling unit 30 and the sealed cavity of the mechanical pump. That is, the first oil suction pipeline 410 and the second oil suction pipeline 420 are isolated from each other and are connected through the sealed cavity to form a loop. The segmented first oil suction pipeline 410 and second oil suction pipeline 420 are easy to process and manufacture on the housing 40. At the same time, the first oil suction pipeline 410 and the second oil suction pipeline 420 have more flexible structural design possibilities. They are shorter than the oil suction pipeline and are easier to be processed into a shape that bends mutually to adapt to the structure of the housing 40. For example, in a specific embodiment of the present utility model, the first oil suction pipeline 410 and the second oil suction pipeline 420 are arranged in parallel. Under the connection effect of the sealed cavity, there will be no problem of oil accumulation and difficult flow. At the same time, their parallel structure can occupy less space on the housing 40 and meet the connection of the cooling unit 30, reducing the difficulty of setting the oil passage on the housing 40.

[0037] In addition, it should be noted that in the motor assembly provided in the embodiment of the present utility model, the stable connection effect between the power shaft 230 and the internal gear 210 is the basis for the effective operation of the power unit 20 to drive the oil to circulate smoothly. Therefore, in order to ensure the connection stability between the power shaft 230 and the internal gear 210, it is preferred that the outer circle of the power shaft 230 and the inner circle of the internal gear 210 are connected through a spline structure to maintain good connection force, and the load-bearing area is increased through the tooth surface structure to be able to withstand a large load. At the same time, the power shaft 230 and the internal gear 210 can also be connected in a way that realizes synchronous rotation, such as through threaded connection and interference fit.

[0038] Further, in some embodiments of the present utility model, the cooling part 30 is an oil cooler for a liquid cooling medium. At the same time, the cooling part 30 is fixedly connected to the housing 40 to form an integral structure, so that the cooling part 30 is stably docked with the opening on the housing 40, enabling the cooling part 30 to be stably connected to the cooling circuit and improving the convenience of the overall design of the motor assembly. In a specific embodiment of the present utility model, the liquid cooling medium of the oil cooler is water. Correspondingly, a water inlet pipe 460 and a water inlet 4610 are further provided on the housing 40. The water inlet pipe 460 is used for the passage of cooling water. The water inlet 4610 is arranged on the water inlet pipe 460, and the water inlet 4610 is communicated with the cooling medium inlet of the cooling part 30. During the operation of the cooling part 30, its cooling water supply pipe has the same path as the oil passage, and both are arranged in the thickness area of the housing 40, without the need for an externally connected water supply pipe structure for the cooling part 30, saving the space occupied by the motor assembly and improving the general applicability of the motor assembly in various installation spaces.

[0039] It should be noted that for the sake of convenience of description, only the parts related to the relevant utility model are shown in the drawings. Without conflict, the embodiments and the features in the embodiments of the present utility model can be combined with each other.

[0040] As shown in the present utility model and the claims, unless the context clearly indicates an exception, the words "a", "an", "one" and / or "the" etc. do not specifically refer to the singular, but may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of the clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. An element defined by the statement "comprising one..." does not exclude the existence of another identical element in the process, method, commodity or device including the element.

[0041] Hereinafter, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0042] The above description is only the preferred embodiment of the present utility model and the explanation of the applied technical principles, and is not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. The scope of the utility model involved in the present utility model is not limited to the technical solutions formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above inventive concept. For example, the technical solutions formed by the mutual replacement of the above features and the technical features (but not limited to) with similar functions disclosed in the present utility model.

Claims

1. A motor assembly with an integrated cooling system, characterized in that: It includes a stator, a power unit, a cooling unit and a shell. The shell is a sealed shell on one side of the motor, and the shell has a hidden oil passage embedded in its thickness area. The inlet and outlet of the oil passage are respectively connected with the inlet and outlet of the stator to form a cooling circuit, and the cooling unit and the power unit are both arranged on the path of the cooling circuit. The power unit is started to drive the oil to circulate in the cooling circuit.

2. The motor assembly of the integrated cooling system according to claim 1, characterized in that: The oil passage at least includes an oil suction pipeline and an oil inlet pipeline, the stator includes a first oil inlet and a first oil outlet, the second oil inlet of the oil suction pipeline is connected to the first oil outlet, the second oil outlet of the oil suction pipeline is connected to the inlet of the cooling unit, the outlet of the cooling unit is connected to the third oil inlet of the oil inlet pipeline, and the third oil outlet of the oil inlet pipeline is connected to the first oil inlet; The second oil inlet, the second oil outlet, the third oil inlet, the third oil outlet, and the inlet and outlet of the cooling part are all integrated on the housing.

3. The motor assembly of the integrated cooling system according to claim 2, characterized in that: The oil inlet pipeline is also connected to an oil return pipeline to communicate with the oil suction pipeline, and a pressure relief part is provided at the connecting position between the oil inlet pipeline and the oil return pipeline. The pressure relief part is normally closed and opens when the pressure in the oil inlet pipeline reaches a preset pressure.

4. The motor assembly of the integrated cooling system according to claim 3, characterized in that: The pressure relief part includes an oil ball, a spring and an oil plug. The oil ball blocks the oil inlet pipeline and bears the oil pressure in the oil inlet pipeline. When the oil pressure in the oil inlet pipeline reaches the preset pressure, the oil ball and the spring are compressed, the spring contracts, and the oil inlet pipeline is connected to the oil return pipeline.

5. The motor assembly of the integrated cooling system according to claim 2, characterized in that: The power unit is a mechanical pump and includes a closed cavity for access to the cooling circuit. An internal gear and an external gear that mesh with each other are arranged in the closed cavity. The internal gear is connected to a power shaft extending from a first power source to rotate synchronously. The rotation of the external gear is driven by the internal gear to pump oil to circulate in the cooling circuit.

6. The motor assembly of the integrated cooling system according to claim 5, characterized in that: An annular oil seal is provided between the inner gear and the power shaft, and the outer gear is sealed with a cover plate structure via an annular gasket.

7. The motor assembly of the integrated cooling system according to claim 5, characterized in that: The oil suction pipeline includes a first oil suction pipeline and a second oil suction pipeline arranged in parallel, the two ends of the first oil suction pipeline are respectively connected to the first oil outlet and the closed cavity of the mechanical pump, and the two ends of the second oil suction pipeline are respectively connected to the inlet of the cooling part and the closed cavity of the mechanical pump.

8. The motor assembly of the integrated cooling system according to claim 5, characterized in that: The outer ring of the power shaft is connected to the inner ring of the internal gear via a spline.

9. The motor assembly of the integrated cooling system according to claim 2, characterized in that: The cooling part is an oil cooler of liquid cooling medium and is fixedly connected to the shell.

10. The motor assembly of the integrated cooling system according to claim 9, characterized in that: The shell is also provided with a water inlet pipeline and a water inlet, the water inlet pipeline is passed with cooling water, and the water inlet is arranged on the water inlet pipeline and communicated with the cooling medium inlet of the cooling part.

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