Hybrid box and vehicle powertrain

Abstract

The application discloses a hybrid box and a vehicle power system, and relates to the technical field of vehicle power system cooling, wherein the hybrid box comprises an oil pan and a box shell, the box shell is arranged on the oil pan, an oil return port communicating with the oil pan is formed on the box shell, and an oil blocking part is arranged in the box shell and arranged above and opposite to the oil return port to block oil flowing out of the oil return port, the oil pan is arranged to collect the cooling lubricating oil flowing out of the box shell, the oil blocking part is arranged above the oil return port and opposite to the oil return port to block the cooling lubricating oil flowing out of the oil return port when the vehicle is in an extreme tilt state, the cooling lubricating oil can be retained in the hybrid box, and the risk of the cooling lubricating oil flowing out of the hybrid box can be effectively reduced, so that the problem that the cooling lubricating oil in the hybrid box of the existing vehicle is prone to flowing out of the box in the extreme tilt state is solved.

Description

Technical Field

[0001] This invention relates to the field of vehicle powertrain cooling technology, and particularly to a hybrid gearbox and vehicle powertrain. Background Technology

[0002] Off-road vehicles typically have a larger tilt angle than regular cars under actual operating conditions. This is because off-road vehicles are designed to provide better off-road performance and passability. When an off-road vehicle climbs a steep slope, it may even be in a state of extreme tilt. At this time, the existing cooling and lubricating oil in the hybrid gearbox is prone to flow out of the gearbox due to the extreme tilt, and will not remain in the gearbox, causing inconvenience to the cooling and lubrication of the entire hybrid gearbox. Summary of the Invention

[0003] The main objective of this invention is to propose a hybrid vehicle powertrain system that aims to solve the problem that the cooling and lubricating oil in the hybrid gearbox of existing vehicles is prone to flowing out of the gearbox under extreme tilt conditions.

[0004] To achieve the above objectives, the present invention provides a hybrid box comprising:

[0005] Oil pan; and,

[0006] A housing is provided on the oil pan, and an oil return port communicating with the oil pan is formed on the housing. An oil baffle is provided inside the housing, and the oil baffle is provided above the oil return port and directly opposite the oil return port, so as to block the oil liquid poured out of the oil pan from the oil return port.

[0007] In one embodiment, the oil baffle includes an oil baffle plate disposed within the housing.

[0008] In one embodiment, the hybrid housing further includes a motor cylinder in which a stator assembly is interference-fitted.

[0009] In one embodiment, a first oil return groove is formed inside the motor cylinder, and a second oil return groove is formed inside the housing. Both the first oil return groove and the second oil return groove are connected to the oil return port.

[0010] A cooling oil passage is formed inside the motor cylinder, and the outlet of the cooling oil passage is connected to the first return oil tank.

[0011] In one embodiment, the inner wall of the motor cylinder is provided with a cooling oil groove extending circumferentially along the motor cylinder, and the cooling oil groove is provided in multiple ways and spaced apart along the axial direction of the motor cylinder;

[0012] The first oil return groove is located at the bottom of the inner wall of the motor cylinder and extends along the axial direction of the motor cylinder. The first oil return groove connects to multiple cooling oil grooves.

[0013] The cooling oil circuit includes multiple cooling oil grooves.

[0014] In one embodiment, an annular tube is further provided inside the motor barrel, the annular tube being arranged corresponding to the coil of the stator assembly;

[0015] The cooling oil circuit includes the inner cavity of the annular pipe.

[0016] In one embodiment, two annular tubes are provided, and a plurality of cooling oil grooves are arranged between the two annular tubes along the axial direction of the motor cylinder.

[0017] In one embodiment, an oil injector is provided on the annular pipe.

[0018] In one embodiment, a rotor assembly, including a rotating shaft, is also rotatably mounted within the stator assembly.

[0019] A shaft tube is also provided inside the motor cylinder, and the outlet of the shaft tube is set corresponding to the rotating shaft;

[0020] The cooling oil circuit includes the inner cavity of the core tube.

[0021] The present invention also proposes a vehicle powertrain system, including the above-described hybrid gearbox, wherein the hybrid gearbox comprises:

[0022] Oil pan; and,

[0023] A housing is provided on the oil pan, and an oil return port communicating with the oil pan is formed on the housing. An oil baffle is provided inside the housing, and the oil baffle is provided above the oil return port and directly opposite the oil return port, so as to block the oil liquid poured out of the oil pan from the oil return port.

[0024] In the technical solution of the present invention, an oil pan is provided to collect the cooling lubricating oil flowing out of the housing. The housing is disposed on the oil pan, and an oil return port is formed on the housing to connect the oil pan and the housing, so that the cooling lubricating oil in the housing can flow into the oil pan. At the same time, an oil baffle is provided in the housing, which is located above and directly opposite the oil return port, so as to back the cooling lubricating oil flowing out of the oil return port when the vehicle is in a state of extreme tilt, so that the cooling lubricating oil can be retained in the hybrid housing. This can effectively reduce the risk of cooling oil flowing out of the hybrid housing, thereby solving the problem that the cooling lubricating oil in the hybrid housing of existing vehicles is prone to flowing out of the housing under extreme tilt conditions. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of an embodiment of the hybrid box provided by the present invention;

[0027] Figure 2 This is a schematic diagram of another embodiment of the hybrid box provided by the present invention;

[0028] Figure 3 A schematic diagram of another embodiment of the hybrid box provided by the present invention;

[0029] Figure 4 This is a schematic diagram of another embodiment of the hybrid box provided by the present invention.

[0030] Explanation of icon numbers:

[0031] 100. Hybrid box; 1. Oil pan; 2. Box housing; 21. Oil return port; 22. Second oil return groove; 3. Oil baffle; 4. Motor cylinder; 41. First oil return groove; 42. Cooling oil passage; 421. Cooling oil groove; 422. Annular pipe; 423. Shaft tube.

[0032] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0034] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0035] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0036] Off-road vehicles typically have a larger tilt angle than regular cars under actual operating conditions. This is because off-road vehicles are designed to provide better off-road performance and passability. When an off-road vehicle climbs a steep slope, it may even be in a state of extreme tilt. At this time, the existing cooling and lubricating oil in the hybrid gearbox is prone to flow out of the gearbox due to the extreme tilt, and will not remain in the gearbox, causing inconvenience to the cooling and lubrication of the entire hybrid gearbox.

[0037] Based on this, the present invention proposes a hybrid gearbox for vehicle powertrain systems, aiming to solve the problem of existing vehicle hybrid gearboxes where cooling lubricating oil easily leaks out of the gearbox under extreme tilting conditions. Specifically, Figures 1 to 4 This is a schematic diagram of the structure of the hybrid box provided by the present invention.

[0038] Please see Figures 1 to 4 In one embodiment of the present invention, the hybrid tank 100 includes an oil pan 1 and a tank housing 2. The tank housing 2 is disposed on the oil pan 1. An oil return port 21 communicating with the oil pan 1 is formed on the tank housing 2. An oil blocking part 3 is provided inside the tank housing 2. The oil blocking part 3 is disposed above the oil return port 21 and is directly opposite to the oil return port 21 to block the oil liquid poured out of the oil pan 1 from the oil return port 21.

[0039] In the technical solution of the present invention, by setting the oil pan 1 to collect the cooling lubricating oil flowing out of the housing 2, the housing 2 is provided on the oil pan 1, and an oil return port 21 is formed on the housing 2 to communicate with the oil pan 1, so that the cooling lubricating oil in the housing 2 can flow into the oil pan 1. At the same time, an oil baffle 3 is provided in the housing 2, which is located above the oil return port 21 and directly opposite the oil return port 21, so that when the vehicle is in a state of extreme tilt, it backs the cooling lubricating oil flowing out of the oil return port 21, so that the cooling lubricating oil can be retained in the hybrid housing 100, which can effectively reduce the risk of cooling oil flowing out of the hybrid housing 100, thereby solving the problem that the cooling lubricating oil in the hybrid housing 100 of existing vehicles is prone to flowing out of the housing under extreme tilt conditions.

[0040] It should be noted that the oil pan 1 has a receiving cavity communicating with the oil return port 21 to receive the cooling lubricating oil flowing in from the oil return port 21. Furthermore, the forming method of the oil pan 1 and the housing 2 is not limited; the oil pan 1 and the housing 2 can be integrally formed or separately formed. In particular, the oil pan 1 and the housing 2 are separately formed. This separate forming reduces the forming difficulty of the hybrid housing 100 and facilitates manufacturing. Furthermore, the connection method between the oil pan 1 and the housing 2 is varied; the oil pan 1 and the housing 2 can be welded together or screwed together, etc., and this invention does not limit this.

[0041] The oil-blocking part 3 can take many forms, such as an oil-blocking rib or an oil-blocking block. This invention does not limit the type of oil-blocking part 3. However, the oil-blocking range of an oil-blocking rib is limited, and the oil-blocking block has a larger volume. Since the internal space of the housing 2 is limited, it is prone to interference with other structures within the housing 2. Therefore, in one embodiment of this invention, please refer to... Figure 1 The oil baffle 3 includes an oil baffle plate disposed inside the housing 2. Thus, the use of an oil baffle plate is convenient for placement inside the housing 2 and also ensures that the oil baffle 3 has a sufficient oil baffle range, thus guaranteeing the oil baffle effect of the oil baffle 3.

[0042] Furthermore, the arrangement of the oil baffle 3 is not limited. The oil baffle can be a flat plate, an arc-shaped plate, etc., as long as it can block oil. The present invention does not limit this. Specifically, in this embodiment, the oil baffle is arranged in an arc shape. Thus, the arc shape is adopted to match the shape of the housing 2.

[0043] In one embodiment of the present invention, the oil baffle 3 and the housing 2 can be formed in various ways. The oil baffle 3 and the housing 2 can be formed separately or integrally. The present invention does not limit this. Specifically, in this embodiment, the housing 2 and the oil baffle are integrally formed. Since the structure of the oil baffle 3 is relatively simple, if it is formed separately, the oil baffle and the housing 2 need to be assembled together, which is cumbersome. Therefore, the housing 2 and the oil baffle are integrally formed, which can improve the connection strength between the oil baffle and the housing 2 and save subsequent assembly processes, thereby improving efficiency.

[0044] In one embodiment of the present invention, the hybrid housing 100 further includes a motor cylinder 4, in which a stator assembly is interference-fitted. Thus, by providing the motor cylinder 4 to mount the stator assembly, and by using an interference fit between the motor cylinder 4 and the stator assembly, the stator assembly can be fixed within the motor cylinder 4 to prevent separation, and the stator assembly can be brought into close contact with the motor cylinder 4, reducing the thermal resistance between the stator assembly and the motor cylinder 4, and improving the heat exchange efficiency between the motor cylinder 4 and the stator assembly, thereby contributing to improved cooling performance of the hybrid housing 100.

[0045] It should be noted that the motor cylinder 4 is equipped with a drive motor, which includes the stator assembly, so that the drive motor can be connected to the hybrid housing 100, enabling the drive motor to drive the gear assembly inside the hybrid housing 100 to rotate. Furthermore, there are various ways to connect the motor cylinder 4 to the housing 2; the motor cylinder 4 and the housing 2 can be connected by welding, bolts, etc., and this invention does not limit this. Specifically, in this embodiment, the motor cylinder 4 is detachably installed on the housing 2. This detachable connection method allows the motor cylinder 4 and the housing 2 to be disassembled and reassembled, facilitating subsequent maintenance or replacement.

[0046] Furthermore, in order to cool the stator assembly of the motor cylinder 4, a first oil return groove 41 is formed inside the motor cylinder 4, and a second oil return groove 22 is formed inside the housing 2. Both the first oil return groove 41 and the second oil return groove 22 are connected to the oil return port 21. A cooling oil passage 42 is formed inside the motor cylinder 4, and the outlet of the cooling oil passage 42 is connected to the first oil return groove 41. Thus, by setting the first oil return groove 41, the cooling lubricating oil in the motor cylinder 4 is collected. By setting the second oil return groove 22, the cooling lubricating oil in the housing 2 is collected. At the same time, both the first oil return groove 41 and the second oil return groove 22 are connected to the oil return port 21, so that the cooling lubricating oil in the first oil return groove 41 and the second oil return groove 22 can flow into the oil pan 1 through the oil return port 21. By setting the cooling oil passage 42, the heat in the motor cylinder 4 is carried away, preventing the heat from accumulating in the motor cylinder 4, thereby cooling the stator assembly in the motor cylinder 4 and preventing the drive motor in the motor cylinder 4 from overheating.

[0047] It should be noted that the first oil return groove 41 and the second oil return groove 22 can be connected to the oil pan 1 respectively, so that the cooling and lubricating oil in the motor cylinder 4 and the housing 2 can flow into the oil pan 1 respectively. However, if this is set up, the oil pan 1 needs to be extended to the motor cylinder 4 in order to connect the first oil return groove 41 to the oil pan 1, which will increase the volume of the oil pan 1 and easily interfere with other structures of the vehicle. Therefore, the first oil return groove 41 and the second oil return groove 22 are both connected to the return port, so that the first oil return groove 41 and the second oil return groove 22 are connected, and the cooling and lubricating oil in the first oil return groove 41 and the second oil return groove 22 can flow into the oil pan 1 through the oil return port 21, so as to simplify the structure of the cooling oil circuit 42 of the hybrid box 100.

[0048] In one embodiment of the present invention, the inner wall of the motor cylinder 4 is provided with cooling oil grooves 421 extending circumferentially along the motor cylinder 4. Multiple cooling oil grooves 421 are provided and spaced apart along the axial direction of the motor cylinder 4. The first return oil groove 41 is provided at the bottom of the inner wall of the motor cylinder 4 and extends along the axial direction of the motor cylinder 4. The first return oil groove 41 connects multiple cooling oil grooves 421. The cooling oil passage 42 includes the cavity of multiple cooling oil grooves 421. Thus, by providing multiple cooling oil grooves 421, the cooling range of the cooling oil passage 42 is expanded, which is beneficial to improving the cooling effect of the motor cylinder 4.

[0049] It should be noted that the number of cooling oil grooves 421 is not limited. For example, there can be two, three, four, or five, etc. The present invention does not limit this. Furthermore, there are various ways to arrange the multiple cooling oil grooves 421. For example, the multiple cooling oil grooves 421 can be evenly distributed along the axial direction of the motor cylinder 4, or they can be arranged in an increasing or decreasing manner along the axial direction of the motor cylinder 4, so that the distance between two adjacent cooling oil grooves 421 gradually increases or decreases. The specific arrangement can be adjusted as needed, and the present invention does not limit this.

[0050] Theoretically, the more cooling oil grooves 421 there are, the better the cooling effect. However, the more cooling oil grooves 421 there are, the more complex the cooling oil circuit 42 becomes, and the higher the manufacturing difficulty. Therefore, in this embodiment, three cooling oil grooves 421 are provided. This ensures the cooling effect of the motor cylinder 4 while reducing the manufacturing difficulty of the motor cylinder 4, making it easier to manufacture and reducing the production cost of the motor cylinder 4. In particular, the inner wall of the motor cylinder 4 is provided with a connecting oil groove extending along the axial direction of the motor cylinder 4. The connecting oil groove connects multiple cooling oil grooves 421, so that the multiple cooling oil grooves 421 can be connected and supplied with oil through the same oil supply pipe. Furthermore, multiple connecting oil grooves are provided, and the multiple connecting oil grooves are spaced apart along the circumference of the motor cylinder 4. In this way, by providing multiple connecting oil grooves, the flow of cooling lubricating oil between different cooling oil grooves 421 is facilitated, so as to remove the heat of the motor cylinder 4 in time, thereby helping to improve the cooling effect of the motor cylinder 4.

[0051] In one embodiment of the present invention, an annular tube 422 is further provided inside the motor cylinder 4. The annular tube 422 is arranged corresponding to the coil of the stator assembly. The cooling oil passage 42 includes the inner cavity of the annular tube 422. Since the coil of the stator assembly generates a high amount of heat when the drive motor is working, the annular tube 422 is provided to cool the coil of the stator assembly and prevent the coil of the stator assembly from overheating. Furthermore, two annular tubes 422 are provided. Along the axial direction of the motor cylinder 4, a plurality of cooling oil grooves 421 are arranged between the two annular tubes 422. In this way, by providing two annular tubes 422, the coils of the stator assembly at both ends of the motor cylinder 4 are cooled, which is compatible with the stator assembly inside the motor cylinder 4 and helps to improve the cooling effect of the cooling oil passage 42.

[0052] It should be noted that there are various ways to arrange the two annular pipes 422 and the multiple cooling oil tanks 421. The two annular pipes 422 can be arranged between the multiple cooling oil tanks 421, or the multiple cooling oil tanks can be arranged between the two annular pipes 422, or one annular pipe 422 can be arranged between the multiple cooling oil tanks 421 and the other annular pipe 422 can be arranged outside the multiple cooling oil tanks 421, etc. The present invention does not limit this. However, since the cooling oil tanks 421 are mainly used to cool the motor cylinder 4, and the annular pipes 422 are mainly used to cool the coils of the stator assembly, the multiple cooling oil tanks 421 are arranged between the two annular pipes 422 so that the two annular pipes 422 can be arranged to cool the coils of the stator assembly at both ends of the motor cylinder 4. This allows the position of the annular pipes 422 to be adapted to the position of the coils of the stator assembly, so that the cooling oil circuit 42 can remove the heat of the coils of the stator assembly in time, ensuring the cooling effect of the hybrid box 100.

[0053] In one embodiment of the present invention, an oil nozzle is provided on the annular tube 422. By providing the oil nozzle, the stator assembly coil is directly sprayed with oil for cooling. Compared to cooling the stator assembly coil by cooling the motor barrel 4, the spraying method allows the cooling lubricating oil to directly cool the stator assembly coil, significantly reducing the thermal resistance during heat transfer and thus improving the cooling effect of the hybrid box 100. Furthermore, the number of oil nozzles is not limited; it can be one or more. Specifically, in this embodiment, multiple oil nozzles are provided, spaced apart along the circumference of the motor barrel 4. By providing multiple oil nozzles to cool the stator assembly coil around the circumference of the motor barrel 4, the temperature field of the stator assembly coil within the motor barrel 4 can be uniformly distributed along the circumference of the motor barrel 4, preventing localized overheating of the stator assembly coil.

[0054] In one embodiment of the present invention, a rotor assembly is rotatably mounted within the stator assembly. The rotor assembly includes a rotating shaft. A shaft tube 423 is also provided inside the motor cylinder 4. The outlet of the shaft tube 423 is provided corresponding to the rotating shaft. The cooling oil passage 42 includes the inner cavity of the shaft tube 423. Thus, by providing the shaft tube 423, cooling lubricating oil is sprayed onto the rotating shaft, so that the cooling lubricating oil can directly cool the rotating shaft, which can significantly reduce the thermal resistance in the heat transfer process, thereby helping to improve the cooling effect of the hybrid box 100.

[0055] Please refer to the following: Figures 1 to 4In one embodiment of the present invention, the mixing tank 100 includes an oil pan 1 and a tank housing 2. The tank housing 2 is disposed on the oil pan 1. An oil return port 21 communicating with the oil pan 1 is formed on the tank housing 2. An oil baffle 3 is provided inside the tank housing 2. The oil baffle 3 is disposed above and directly opposite the oil return port 21 to block oil from being poured out of the oil pan 1 from the oil return port 21. The oil baffle 3 includes an oil baffle plate disposed inside the tank housing 2. The drive housing 100 also includes a motor cylinder 4, in which a stator assembly is interference-fitted. A first oil return groove 41 is formed inside the motor cylinder 4, and a second oil return groove 22 is formed inside the housing 2. Both the first oil return groove 41 and the second oil return groove 22 are connected to the oil return port 21. A cooling oil passage 42 is formed inside the motor cylinder 4, and the outlet of the cooling oil passage 42 is connected to the first oil return groove 41. A cooling oil groove 421 extending circumferentially along the inner wall of the motor cylinder 4 is formed. Multiple cooling oil grooves 421 are provided and spaced apart along the axial direction of the motor cylinder 4. The first return oil groove 41 is opened at the bottom of the inner wall of the motor cylinder 4 and extends along the axial direction of the motor cylinder 4. The first return oil groove 41 connects the multiple cooling oil grooves 421. The cooling oil passage 42 includes the groove cavities of the multiple cooling oil grooves 421. An annular pipe 422 is also provided inside the motor cylinder 4. The annular pipe 422 is arranged corresponding to the coil of the stator assembly. The cooling oil passage 42 includes the... The annular tube 422 has an inner cavity. Two annular tubes 422 are provided along the axial direction of the motor cylinder 4. Multiple cooling oil grooves 421 are arranged between the two annular tubes 422. Oil nozzles are provided on the annular tubes 422. A rotor assembly is also rotatably installed in the stator assembly. The rotor assembly includes a rotating shaft. A shaft tube 423 is also provided in the motor cylinder 4. The outlet of the shaft tube 423 is provided corresponding to the rotating shaft. The cooling oil passage 42 includes the inner cavity of the shaft tube 423.

[0056] In this embodiment, by providing the oil baffle 3, the cooling lubricating oil flowing out of the oil return port 21 is blocked when the vehicle is in a state of extreme tilt, so that the cooling lubricating oil can be retained in the hybrid housing 100, which can effectively reduce the risk of cooling oil flowing out of the hybrid housing 100. Furthermore, the oil baffle 3 is an oil baffle plate, which is convenient to install in the housing 2 and can also make the oil baffle 3 have a sufficient oil baffle range to ensure the oil baffle effect. By providing the motor cylinder 4, the stator assembly can be installed. At the same time, the motor cylinder 4 and the stator assembly adopt an interference fit, which can fix the stator assembly in the housing 2. The stator assembly is positioned inside the motor cylinder 4 to prevent it from separating from the motor cylinder 4. This allows the stator assembly to fit snugly inside the motor cylinder 4, reducing the thermal resistance between the stator assembly and the motor cylinder 4, and improving the heat exchange efficiency between them. This, in turn, helps improve the cooling effect of the hybrid housing 100. Furthermore, a first oil return groove 41 is provided to collect the cooling lubricating oil inside the motor cylinder 4, and a second oil return groove 22 is provided to collect the cooling lubricating oil from the housing 2. Both the first oil return groove 41 and the second oil return groove 22 are connected to the oil return port 21, ensuring that the first oil return groove... The cooling lubricating oil in the oil trough 41 and the second return oil trough 22 can flow into the oil pan 1 through the return oil port 21. By providing the cooling oil passage 42, heat is carried away from the motor cylinder 4, preventing heat accumulation and cooling the stator assembly inside the motor cylinder 4 to prevent overheating of the drive motor. Furthermore, by providing multiple cooling oil troughs 421, the cooling range of the cooling oil passage 42 is expanded, which helps improve the cooling effect of the motor cylinder 4. The annular pipe 422 is also provided to cool the coils of the stator assembly, preventing overheating. By using the oil nozzles to directly spray and cool the coils of the stator assembly, compared to cooling the stator assembly coils by cooling the motor cylinder 4, the spraying method allows the cooling lubricating oil to directly cool the coils of the stator assembly, which can significantly reduce the thermal resistance during heat transfer, thereby helping to improve the cooling effect of the hybrid box 100. In addition, by using the shaft tube 423 to spray cooling lubricating oil onto the rotating shaft, the cooling lubricating oil can directly cool the rotating shaft, which can significantly reduce the thermal resistance during heat transfer, thereby helping to improve the cooling effect of the hybrid box 100.

[0057] To achieve the above objectives, the present invention also proposes a vehicle power system, which includes a hybrid gearbox 100. The specific structure of the hybrid gearbox 100 is as described in the above embodiments. Since the vehicle power system adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0058] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A hybrid box, characterized in that, include: Oil pan; as well as, A housing is provided on the oil pan, and an oil return port communicating with the oil pan is formed on the housing. An oil baffle is provided inside the housing, and the oil baffle is provided above the oil return port and directly opposite the oil return port to block the oil liquid poured out of the oil pan from the oil return port. The hybrid box also includes a motor cylinder, in which a stator assembly is interference-fitted; A first oil return groove is formed inside the motor cylinder, and a second oil return groove is formed inside the housing. Both the first oil return groove and the second oil return groove are connected to the oil return port. A cooling oil passage is formed inside the motor cylinder, and the outlet of the cooling oil passage is connected to the first return oil tank.

2. The hybrid box as described in claim 1, characterized in that, The oil baffle includes an oil baffle plate disposed inside the housing.

3. The hybrid box as described in claim 1, characterized in that, The inner wall of the motor cylinder is provided with cooling oil grooves extending circumferentially along the motor cylinder, and multiple cooling oil grooves are provided and spaced apart along the axial direction of the motor cylinder. The first oil return groove is located at the bottom of the inner wall of the motor cylinder and extends along the axial direction of the motor cylinder. The first oil return groove connects to multiple cooling oil grooves. The cooling oil circuit includes multiple cooling oil grooves.

4. The hybrid box as described in claim 3, characterized in that, An annular tube is also provided inside the motor cylinder, and the annular tube is arranged corresponding to the coil of the stator assembly; The cooling oil circuit includes the inner cavity of the annular pipe.

5. The hybrid box as described in claim 4, characterized in that, Two annular pipes are provided, and multiple cooling oil grooves are arranged between the two annular pipes along the axial direction of the motor cylinder.

6. The hybrid box as described in claim 4, characterized in that, An oil injector is provided on the annular pipe.

7. The hybrid box as described in claim 1, characterized in that, A rotor assembly, including a rotating shaft, is also rotatably mounted within the stator assembly. A shaft tube is also provided inside the motor cylinder, and the outlet of the shaft tube is set corresponding to the rotating shaft; The cooling oil circuit includes the inner cavity of the core tube.

8. A vehicle powertrain system, characterized in that, Includes the hybrid box as described in any one of claims 1 to 7.

Images