Powertrain and electric vehicle

Abstract

This application provides a powertrain and an electric vehicle, relating to the field of electric vehicle technology. The powertrain housing includes a gear cavity, a receiving groove, and an oil inlet channel. The gear cavity accommodates a gear set and oil. The receiving groove accommodates an integrated oil pump, which includes an integrated oil pump assembly, a first filter assembly, and a second filter assembly. The second filter assembly, used for fine filtration along the axial direction of the receiving groove, is arranged closer to the bottom of the receiving groove than the first filter assembly used for coarse filtration. The oil inlet of the receiving groove is used to supply oil to the first filter assembly. The oil inlet is distributed on the outer side of the gear cavity wall along the axial direction of the receiving groove. The oil inlet channel is arranged radially adjacent to the receiving groove. One end of the oil inlet channel is located inside the gear cavity and connects to the gear cavity, while the other end is located on the outer side of the gear cavity wall and connects to the oil inlet, allowing oil in the gear cavity to enter the oil inlet, simplifying the oil circuit connection structure of the powertrain and shortening the oil circuit.

Description

Technical Field

[0001] This application relates to the field of electric vehicle technology, and in particular to a powertrain and an electric vehicle. Background Technology

[0002] The oil stored inside the powertrain housing needs to be pumped into the coarse filter and fine filter for filtration and impurity removal. This is usually done by connecting the housing or external pipelines in sequence, which makes the oil circuit structure more complex, the oil circuit path longer, and the volume occupied larger. Summary of the Invention

[0003] This application provides a powertrain and an electric vehicle to simplify the oil circuit connection structure of the powertrain, shorten the oil circuit, and reduce the size of the powertrain.

[0004] In a first aspect, this application provides a powertrain. The powertrain housing includes a gear cavity, a receiving groove, and an oil inlet channel. The gear cavity is used to receive the gear set and oil of the powertrain. The receiving groove is used to receive an integrated oil pump. The integrated oil pump includes an integrated oil pump assembly, a first filter assembly, and a second filter assembly. The oil pump motor in the oil pump assembly drives the oil in the gear cavity to flow into the receiving groove, be filtered by the first filter assembly, and then flow through the second filter assembly for further filtration. The distance between the first filter assembly and the bottom of the receiving groove along the axial direction is greater than the distance between the second filter assembly and the bottom of the receiving groove. The receiving groove includes an oil inlet distributed on the periphery of the receiving groove. The oil inlet is used to supply oil to the first filter assembly. Along the axial direction of the receiving groove, the oil inlet is distributed on the outer side of the cavity wall of the gear cavity. The oil inlet channel and the receiving groove are arranged adjacent to each other along the radial direction of the receiving groove. One end of the oil inlet channel is distributed inside the gear cavity and is used to connect to the gear cavity, and the other end of the oil inlet channel is distributed on the outer side of the cavity wall of the gear cavity and is used to connect to the oil inlet.

[0005] In this embodiment, the technical solution addresses the problems of simplifying the oil circuit connection structure of the powertrain, shortening the oil circuit, and reducing the size of the powertrain. Since the housing of the powertrain is used to house an integrated oil pump, the second filter assembly for fine filtration in the integrated oil pump is arranged near the bottom of the housing, while the first filter assembly for coarse filtration is arranged away from the bottom of the housing. Therefore, the oil inlet of the housing for supplying oil to the first filter assembly must be located away from the bottom of the housing. The oil inlet of the housing for supplying oil to the first filter assembly is located on the outer wall of the gear cavity. Oil in the gear cavity cannot be directly supplied to the oil inlet. By setting an oil inlet channel, with one end of the channel located inside the gear cavity and the other end located on the outer wall of the gear cavity, and by connecting one end of the channel to the gear cavity and the other end to the oil inlet, oil in the gear cavity can be supplied to the oil inlet of the housing through the oil inlet channel. This simplifies the oil circuit connection structure. Arranging the oil inlet channel and the receiving tank adjacent to each other along the radial direction of the receiving tank results in a short oil path, low oil flow resistance, and a close distance between the oil inlet channel and the receiving tank, which helps to reduce the volume of the powertrain housing.

[0006] In one embodiment, the axial direction of the oil inlet channel is parallel to the axial direction of the receiving groove.

[0007] In this embodiment, the technical solution addresses the problem of simplifying both the oil passage structure and the machining process. Arranging the oil inlet channel and the receiving groove adjacent and parallel shortens the path for the oil inlet channel to deliver oil to the inlets located on the outer wall of the gear cavity. This also simplifies the structure of the oil inlet channel. Furthermore, the parallel axial direction of the oil inlet channel to the receiving groove ensures that the draft directions of the oil inlet channel and the receiving groove are aligned during the die-casting process of the powertrain housing, simplifying the process.

[0008] In one embodiment, along the axial direction of the receiving groove, the length of the oil inlet channel is less than or equal to the length of the receiving groove, and the maximum distance between the other end of the oil inlet channel and the bottom of the receiving groove is less than or equal to the depth of the receiving groove.

[0009] In this embodiment, the technical solution addresses the problems of shortening the oil circuit connection path and reducing the size of the powertrain. A shorter oil inlet channel results in a shorter flow path between the gear cavity and the oil inlet, which is beneficial for shortening the oil circuit. It also allows for the use of less material to form the oil inlet channel, saving material.

[0010] In this embodiment, a portion of the groove periphery of the receiving groove is distributed along the axial direction of the receiving groove on the outer side of the gear cavity wall. The maximum distance between the other end of the oil inlet channel distributed on the outer side of the gear cavity wall and the bottom of the receiving groove is small, so that the other end of the oil inlet channel does not protrude from the groove opening of the receiving groove. This way, the oil inlet channel does not occupy additional space outside the axial direction of the receiving groove on the portion of the groove periphery of the receiving groove distributed on the outer side of the gear cavity, making the powertrain smaller in size.

[0011] In one embodiment, one end of the oil inlet channel includes an inlet for communicating with a gear cavity, a portion of the cavity wall of the gear cavity for blocking the lower part of the inlet, and a step is formed between the upper surface of a portion of the cavity wall of the gear cavity and the inner wall surface of the oil inlet channel.

[0012] In this embodiment, the technical solution addresses the problem of simultaneously simplifying the oil passage connection structure between the oil inlet channel and the gear cavity while improving oil flow velocity. A portion of the gear cavity wall is blocked at the lower part of the inlet at one end of the oil inlet channel, allowing the inlet to be located at the bottom of the gear cavity. This facilitates the flow of oil from one end of the oil inlet channel into the inlet of the receiving tank. A step is formed between the upper surface of a portion of the gear cavity wall and the inner wall of the oil inlet channel, facilitating the introduction of oil from the inlet into the interior of the oil inlet channel and improving oil flow velocity. The stepped structure also helps reduce oil accumulation at the inlet of the oil inlet channel, reducing flow resistance.

[0013] In one embodiment, a portion of the upper surface of the gear cavity wall is an inclined surface or an arcuate surface, which extends downwards from the gear cavity toward the interior of the oil inlet channel.

[0014] In this embodiment, the technical solution addresses the problem of simplifying the oil circuit connection structure between the oil inlet channel and the gear cavity while reducing oil flow resistance. The inclined or arc-shaped upper surface guides the oil in the gear cavity to smoothly cross the step and enter the oil inlet channel, avoiding eddies or resistance caused by abrupt right-angle changes, thus reducing oil flow resistance. Lower oil flow resistance reduces the power requirements of the oil pump motor, facilitating smaller oil pump motors, reducing the size of the integrated oil pump, and consequently, the size of the powertrain.

[0015] In one embodiment, a portion of the cavity wall of the gear cavity is used to block the lower part of the inlet distributed at one end of the oil inlet channel. The inlet is used to connect the gear cavity. A step is formed between the upper surface of a portion of the cavity wall of the gear cavity and the inner wall surface of the oil inlet channel. The upper surface of a portion of the cavity wall of the gear cavity is an inclined surface or an arc-shaped surface. The inclined surface or arc-shaped surface extends downwards from the gear cavity into the oil inlet channel.

[0016] In this embodiment, the technical solution addresses the problem of simplifying the oil passage connection structure between the oil inlet channel and the gear cavity while reducing oil flow resistance and increasing oil flow velocity. By designing the portion connecting the gear cavity wall to the inlet of the oil inlet channel as a gentle step, the inlet of the oil inlet channel is positioned at the bottom of the gear cavity, allowing the oil in the gear cavity to be smoothly introduced into the oil inlet channel with minimal flow resistance.

[0017] In one embodiment, the oil inlet channel includes an inlet and two outlets. The inlet is located at one end of the oil inlet channel and is used to connect the gear cavity and the oil inlet channel. The two outlets are located at the other end of the oil inlet channel. One outlet is used to connect the oil inlet channel and the oil inlet, and the other outlet is used to accommodate a plug. The plug is arranged at intervals from the outlet.

[0018] In this embodiment, the technical solution addresses the challenges of simplifying the powertrain's oil circuit connection structure, preventing oil leakage, and ensuring smooth oil delivery from the inlet channel to the receiving tank. Two outlets are located at the other end of the inlet channel. One outlet connects the inlet channel and the inlet, while the other outlet accommodates a sealing element, preventing oil leakage from the inlet channel through the other outlet. The sealing element is spaced apart from one outlet, ensuring that a sealing element extending from the other outlet into the inlet channel will not block one outlet, thus guaranteeing smooth delivery of oil from the inlet channel to the inlet and the receiving tank through one outlet.

[0019] In one embodiment, the axial direction of the oil inlet channel is parallel to the axial direction of the receiving groove. The inlet of the oil inlet channel is located at one end, and the two outlets are located at the other end. One outlet connects the oil inlet channel and the oil inlet, while the other outlet is arranged axially opposite to the inlet of the oil inlet channel along the receiving groove. The other outlet is used to accommodate a sealing component, and its opening direction is the same as the groove opening direction of the receiving groove. This allows the oil inlet channel to be formed by demolding outward from the other outlet during the die-casting process of the powertrain housing, simplifying the process.

[0020] In one embodiment, the distance between an outlet and an inlet is smaller than the distance between the inlet of the oil inlet channel and an outlet.

[0021] In this embodiment, the distance between the oil inlet and one outlet is small, resulting in a short oil path for the oil in the oil inlet channel to be output from one outlet to the oil inlet of the receiving tank. One outlet is used to connect the oil inlet, and the distance between the inlet of the oil inlet channel and one outlet is large, facilitating the oil inlet channel to extend a sufficient distance from inside the gear cavity to outside the gear cavity to deliver oil to the oil inlet, so that the oil in the gear cavity can be smoothly delivered to the receiving tank for filtration and impurity removal.

[0022] In one embodiment, the housing is used to fix the magnets, which are used to adsorb impurities in the oil. The magnets are distributed in the gear cavity and on the bottom of the receiving groove away from its opening. One end of the oil inlet channel faces the magnets. The oil inlet channel and the magnets are spaced apart at least once along the axial or radial direction of the receiving groove.

[0023] In this embodiment, one end of the oil inlet channel is distributed inside the gear cavity and faces the magnet. The oil inlet channel and the magnet are spaced apart along at least one of the axial or radial directions of the receiving groove, so that one end of the oil inlet channel will not be blocked by the magnet. This ensures that the oil in the gear cavity can smoothly enter the oil inlet channel from one end of the oil inlet channel, thereby avoiding the oil pump assembly in the receiving groove from dry suction.

[0024] In one embodiment, the integrated oil pump includes an oil pump housing for housing an oil pump motor. The oil pump housing includes an inlet and an outlet. The inlet of the oil pump housing is oriented radially along the oil pump motor. A first filter assembly covers the inlet of the oil pump housing. The oil pump motor drives the filtered oil from the inlet of the oil pump housing into the oil pump housing. The outlet of the oil pump housing is oriented axially along the oil pump motor. A second filter assembly covers the outlet of the oil pump housing. The oil pump motor drives the oil inside the oil pump housing to flow out from the outlet of the oil pump housing and be filtered by the second filter assembly. The distance between the oil pump housing and the bottom of the receiving tank along the axial direction of the oil pump motor is less than the distance between the oil inlet and the bottom of the receiving tank. The oil inlet, the first filter assembly, and the inlet of the oil pump housing are arranged sequentially along the radial direction of the oil pump motor.

[0025] In this embodiment, the technical solution addresses the problems of simplifying the connection structure between the oil inlet of the receiving tank and the integrated oil pump, and shortening the oil circuit. The distance between the oil pump housing and the bottom of the receiving tank along the axial direction of the oil pump motor is smaller than the distance between the oil inlet and the bottom of the receiving tank. This allows the oil inlet and the oil pump housing to be arranged radially along the oil pump motor, resulting in a close proximity between them. This allows the oil entering the receiving tank from the oil inlet to enter the oil pump housing via a short path, simplifying the oil circuit structure.

[0026] In this embodiment, the oil inlet, the first filter assembly, and the inlet of the oil pump housing are arranged radially along the oil pump motor, so that the oil in the oil inlet channel can flow radially along the oil pump motor through the oil inlet, the first filter assembly, and the inlet of the oil pump housing into the oil pump housing, simplifying the oil circuit structure and shortening the oil circuit.

[0027] In this embodiment, the inlet of the oil pump housing is arranged radially and the outlet of the oil pump housing is arranged axially, so that the inlet and outlet of the oil pump housing are close together and the oil path in the oil pump housing is short. This reduces the power requirement of the oil pump motor, makes it easier to make the oil pump motor smaller, and makes the integrated oil pump smaller in size, thereby making the housing of the receiving tank and power assembly smaller in size.

[0028] In this embodiment, a first filter assembly for coarse filtration covers the radially outer side of the inlet of the oil pump housing, which is used for oil to enter the oil pump housing radially along the oil pump motor. A second filter assembly for fine filtration covers the axially outer side of the outlet of the oil pump housing, which is used for oil to exit the oil pump housing axially along the oil pump motor. This allows the oil filtered by the first filter assembly to flow into the oil pump housing radially along the oil pump motor through the inlet of the oil pump housing. This allows the oil inside the oil pump housing to be output from the outlet of the oil pump housing axially along the oil pump motor and then discharged from the integrated oil pump after being filtered by the second filter assembly. This makes the oil circuit connection structure of the integrated oil pump simpler and the oil circuit path shorter.

[0029] In one embodiment, the oil pump housing includes a plurality of through holes distributed around the outer wall of the oil pump housing along the circumference of the oil pump motor. Each through hole penetrates the outer wall of the oil pump housing radially along the oil pump motor and serves as an inlet for the oil pump housing. A first filter assembly covers the plurality of through holes. Along the axial direction of the oil pump motor, the inner diameter of the oil inlet is less than or equal to the size of the first filter assembly and greater than the inner diameter of each through hole.

[0030] In this embodiment, the technical solution addresses the problem of simplifying the connection structure between the oil inlet and the oil pump housing while reducing flow resistance. Oil in the inlet channel flows sequentially through the oil inlet, the first filter assembly, and multiple through holes into the oil pump housing. Along the axial direction of the oil pump motor, the inner diameter of the oil inlet is smaller than or equal to the size of the first filter assembly. This smaller inner diameter allows the oil entering the receiving tank from the oil inlet to be directly received and filtered by the first filter assembly. The inner diameter of the oil inlet is larger than the inner diameter of the through holes, facilitating the smooth input of more oil from the inlet channel into the receiving tank. The smaller inner diameter of the through holes allows for the arrangement of more through holes on the outer wall of the oil pump housing, resulting in a larger inlet area. This facilitates the oil entering from the oil inlet being filtered by the first filter assembly and then dispersed through multiple through holes into the oil pump housing, reducing flow resistance.

[0031] In this embodiment, the inlet of the oil pump housing is oriented radially along the oil pump motor. Multiple through holes serving as the inlet of the oil pump housing are distributed around the outer wall of the oil pump housing along the circumference of the oil pump motor. This allows the oil in the receiving tank to enter from all sides of the oil pump housing radially along the oil pump motor, making the area of ​​the oil pump housing for oil input larger and reducing the oil flow resistance.

[0032] In one embodiment, a receiving groove is used to fix a sealing ring, which is distributed around the oil pump housing along the circumference of the oil pump motor. The sealing ring is used to cooperate with the oil pump housing to isolate the inlet and outlet of the oil pump housing. Specifically, along the axial direction of the oil pump motor, the distance between the sealing ring and the bottom of the receiving groove is greater than the distance between the outlet of the oil pump housing and the bottom of the receiving groove, but less than the distance between the oil inlet and the bottom of the receiving groove.

[0033] In this embodiment, the sealing ring mates with the inner wall of the receiving groove and the outer wall of the oil pump housing. Along the axial direction of the oil pump motor, the distance between the sealing ring and the bottom of the receiving groove is greater than the distance between the outlet of the oil pump housing and the bottom of the receiving groove, but less than the distance between the oil inlet and the bottom of the receiving groove. This arrangement of the oil inlet, the sealing ring, and the outlet of the oil pump housing along the axial direction of the oil pump motor prevents the oil entering the receiving groove from the oil inlet from flowing into the oil output from the outlet of the oil pump housing after being filtered by the first filter assembly.

[0034] In one embodiment, the receiving tank includes an oil outlet distributed along the periphery of the tank, which is used to connect to the inlet of the heat exchanger of the powertrain. The second filter assembly, the oil outlet, and the heat exchanger inlet are arranged sequentially along the radial direction of the receiving tank. The axial direction of the oil outlet is perpendicular to the axial direction of the oil inlet channel.

[0035] In this embodiment, the technical solution addresses the challenges of simplifying the oil circuit connection structure between the integrated oil pump and the heat exchanger, shortening the oil circuit, and reducing the powertrain volume. Along the radial direction of the receiving tank, the second filter assembly, the oil outlet, and the heat exchanger inlet are arranged sequentially, allowing the finely filtered oil from the second filter assembly to directly exit the receiving tank through the oil outlet and enter the heat exchanger from the heat exchanger inlet. This results in a short oil circuit path for the filtered oil to flow out of the heat exchanger, and a simple oil circuit connection structure.

[0036] In this embodiment, the axial direction of the oil outlet is perpendicular to the axial direction of the oil inlet channel, which shortens the overall path of the oil from the oil inlet channel into the receiving tank for filtration and then output to the heat exchanger through the oil outlet. This allows the receiving tank and the heat exchanger to be stacked, thus reducing the axial space occupied by the receiving tank and the heat exchanger along the receiving tank in the powertrain, which is beneficial for the miniaturization of the powertrain.

[0037] In one embodiment, along the axial direction of the receiving groove, the distance between the oil inlet and the oil outlet of the receiving groove is less than the length of the oil inlet channel.

[0038] In this embodiment, the technical solution addresses the problems of simplifying the powertrain oil circuit structure and shortening the oil circuit. The small distance between the axial oil inlet and outlet along the receiving groove results in a short oil circuit path within the receiving groove and a simple oil circuit structure. The large length of the axial oil inlet channel along the receiving groove facilitates the transport of oil from the gear cavity to the oil inlet located outside the gear cavity.

[0039] In one embodiment, the gear set includes a first gear set and a second gear set. Along a first direction, the size of the first gear set is larger than the size of the second gear set. A receiving groove is arranged with the second gear set along the first direction, and the receiving groove is arranged with the first gear set along a second direction. The gear cavity includes a first portion and a second portion, arranged along the first direction. Along the second direction, the size of the second portion is smaller than the size of the first portion. The first portion is used to accommodate a part of the first gear set and the second gear set. The second portion is used to accommodate another part of the first gear set, one end of the oil inlet channel, and oil. A portion of the outer wall of the receiving groove forms the cavity wall of the second portion. The second direction is parallel to the axial direction of the receiving groove, and the first direction is perpendicular to the second direction. Specifically, along the second direction, the distance between the other part of the first gear set and the cavity wall of the second portion is smaller than the size of the receiving groove and smaller than the distance between the oil inlet and the other part of the first gear set.

[0040] In this embodiment, the technical solution addresses the problem of balancing a simplified oil circuit structure connecting the gear cavity and the receiving groove with a reduction in the powertrain volume. The size of the first gear set is larger than that of the second gear set along the first direction. The receiving groove and the second gear set are arranged along the first direction, and the receiving groove and the first gear set are arranged along the second direction. This allows the receiving groove to utilize the extra space in the gear cavity along the first direction occupied by the first gear set compared to the second gear set, resulting in a smaller powertrain housing volume.

[0041] In the embodiments of this application, the first part of the gear cavity is used to accommodate a part of the first gear set and the second gear set, and the second part is used to accommodate another part of the first gear set, one end of the oil inlet channel and oil. The second part is made smaller in size along the second direction, so that the volume of the gear cavity can be reduced without affecting the arrangement of the first gear set and the second gear set.

[0042] In this embodiment, a second cavity wall is formed on the outer side of a portion of the reusable trough wall, which facilitates the delivery of oil from the gear cavity to the trough via a short path, thus simplifying the oil circuit structure.

[0043] In this embodiment, the receiving groove needs to accommodate an integrated oil pump with a long axial dimension, so the receiving groove needs to be made deep. By designing the distance between the cavity walls of the other part of the first gear set and the second part along the second direction, the size of the receiving groove, and the distance between the oil inlet and the other part of the first gear set, the oil inlet of the receiving groove is arranged on the outside of the cavity wall of the gear cavity. Therefore, an oil inlet channel needs to be set to connect the gear cavity and the oil inlet so that the oil in the gear cavity can be smoothly transported to the oil inlet of the receiving groove.

[0044] In one embodiment, along a first direction, the size of the second portion gradually decreases from one end closer to the first portion toward the other end farther from the first portion. Along the second direction, the other end of the oil inlet channel protrudes from the other end of the second portion away from the first portion along the first direction from the cavity wall of the second portion. Along the second direction, oil inlets are spaced apart from the other end of the second portion away from the first portion.

[0045] In this embodiment, the technical solution addresses the problem of simplifying the oil passage structure of the gear cavity, oil inlet channel, and receiving groove while reducing the size of the gear cavity, and preventing the oil inlet channel from sucking in dry. The size of the second part along the first direction gradually decreases from one end closer to the first part to the other end farther away from the first part, making the volume of the second part of the gear cavity small, which is beneficial to reducing the volume of the powertrain housing.

[0046] In this embodiment of the application, by making the other end of the oil inlet channel protrude from the second part away from the first part along the second direction along the first direction from the cavity wall of the second part, the oil inlet channel is located at the low part of the gear cavity, which facilitates the guidance of the oil inlet channel.

[0047] In this embodiment of the application, the oil inlet is arranged at intervals with the other end of the second part away from the first part along the second direction, so that the oil inlet can be located at the lower part of the second part of the gear cavity along the second direction, avoiding empty suction and facilitating the flow of oil into the receiving tank.

[0048] Secondly, this application provides an electric vehicle, which includes wheels and a powertrain as described in the second aspect, the powertrain being used to drive the wheels.

[0049] In the powertrain of this application embodiment, since the housing of the powertrain is used to accommodate an integrated oil pump, the second filter component for fine filtration in the integrated oil pump is arranged close to the bottom of the housing, and the first filter component for coarse filtration is arranged away from the bottom of the housing, so that the oil inlet of the housing for supplying oil to the first filter component needs to be arranged away from the bottom of the housing. The oil inlet of the receiving tank for supplying oil to the first filter assembly is located on the outer side of the gear cavity wall. The oil in the gear cavity cannot be directly supplied to the oil inlet. By setting an oil inlet channel, with one end of the oil inlet channel distributed inside the gear cavity and the other end distributed on the outer side of the gear cavity wall, and by connecting one end of the oil inlet channel to the gear cavity and the other end of the oil inlet channel to the oil inlet, the oil in the gear cavity can be supplied to the oil inlet of the receiving tank through the oil inlet channel. The oil circuit connection structure is simple, and the oil inlet channel and the receiving tank are arranged adjacent to each other along the radial direction of the receiving tank, which makes the oil circuit path short, the oil flow resistance small, and the distance between the oil inlet channel and the receiving tank close. It also helps to reduce the volume of the powertrain housing and optimize the layout of the powertrain in the whole vehicle. Attached Figure Description

[0050] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the embodiments of this application will be described below.

[0051] Figure 1 This is a schematic diagram of an electric vehicle provided in an embodiment of this application; Figure 2 This is a schematic diagram of a powertrain provided in an embodiment of this application; Figure 3 This is another schematic diagram of the powertrain provided in the embodiments of this application; Figure 4 This is a partial cross-sectional view of the powertrain provided in an embodiment of this application; Figure 5 This is a schematic diagram of an integrated oil pump provided in an embodiment of this application; Figure 6 This is a cross-sectional view of the housing of the powertrain provided in an embodiment of this application; Figure 7 yes Figure 6 A partial enlarged view of the M1 section of the powertrain housing; Figure 8 yes Figure 6 A partial enlarged view of the M2 section of the powertrain housing; Figure 9 This is a partial cross-sectional view of the housing of the powertrain provided in an embodiment of this application; Figure 10 This is an exploded view of an integrated oil pump provided in an embodiment of this application. Detailed Implementation

[0052] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0053] To simplify the oil circuit connection structure of the powertrain, shorten the oil circuit, and reduce the powertrain volume, the powertrain housing provided in this application includes a gear cavity, a receiving groove, and an oil inlet channel. The gear cavity is used to accommodate the gear set and oil of the powertrain. The receiving groove is used to accommodate an integrated oil pump. The integrated oil pump includes an integrated oil pump assembly, a first filter assembly, and a second filter assembly. The oil pump motor in the oil pump assembly drives the oil in the gear cavity to flow into the receiving groove, be filtered by the first filter assembly, and then flow through the second filter assembly for further filtration. The distance between the first filter assembly and the bottom of the receiving groove along the axial direction is greater than the distance between the second filter assembly and the bottom of the receiving groove. The receiving groove includes an oil inlet distributed on the periphery of the receiving groove. The oil inlet is used to supply oil to the first filter assembly. Along the axial direction of the receiving groove, the oil inlet is distributed on the outer side of the cavity wall of the gear cavity. The oil inlet channel and the receiving groove are arranged adjacent to each other along the radial direction of the receiving groove. One end of the oil inlet channel is distributed inside the gear cavity and is used to connect to the gear cavity, and the other end of the oil inlet channel is distributed on the outer side of the cavity wall of the gear cavity and is used to connect to the oil inlet.

[0054] Because the powertrain housing's receiving groove is used to house the integrated oil pump, the second filter assembly for fine filtration in the integrated oil pump is arranged near the bottom of the receiving groove, while the first filter assembly for coarse filtration is arranged away from the bottom of the receiving groove. Therefore, the oil inlet of the receiving groove used to supply oil to the first filter assembly must be located away from the bottom of the receiving groove. The oil inlet of the receiving groove used to supply oil to the first filter assembly is located on the outer wall of the gear cavity. Oil in the gear cavity cannot be directly supplied to the oil inlet. By setting up an oil inlet channel, with one end of the channel located inside the gear cavity and the other end located on the outer wall of the gear cavity, and by connecting one end of the channel to the gear cavity and the other end to the oil inlet, oil in the gear cavity can be supplied to the oil inlet of the receiving groove through the oil inlet channel. The oil circuit connection structure is simple, and arranging the oil inlet channel and the receiving groove radially adjacent to each other along the receiving groove results in a short oil path, low oil flow resistance, and a close distance between the oil inlet channel and the receiving groove, facilitating a reduction in the powertrain housing volume.

[0055] The powertrain provided in this application embodiment can be applied to electric vehicles to improve the overall performance of electric vehicles.

[0056] Figure 1 This is a schematic diagram of an electric vehicle 1 provided in an embodiment of this application. Figure 2 This is a schematic diagram of a powertrain 10 provided in an embodiment of this application. Figure 3 This is another schematic diagram of the powertrain 10 provided in the embodiments of this application. Figure 4 This is a partial cross-sectional view of the powertrain 10 provided in an embodiment of this application.

[0057] In one embodiment, such as Figure 1 As shown, the electric vehicle 1 includes a powertrain 10 and wheels 20, with the powertrain 10 used to drive the wheels 20.

[0058] In one embodiment, such as Figure 2 As shown, the housing 100 of the powertrain 10 includes a gear cavity 110 and a receiving groove 120. The gear cavity 110 is used to receive the gear set 200 and oil of the powertrain 10, and the receiving groove 120 is used to receive the integrated oil pump 300.

[0059] In this embodiment, the integrated oil pump 300 drives the oil to flow within the powertrain 10. The integrated oil pump 300 also filters and removes impurities from the oil delivered to the gear chamber 110, thereby improving the cleanliness of the oil within the powertrain 10. The filtered and purified oil from the integrated oil pump 300 is then used for cooling and lubrication of the gear set 200.

[0060] In one embodiment, the gear set 200 is at least one of the gear set 200 of the reducer of the powertrain 10 or the gear set 200 of the speed increaser of the powertrain 10.

[0061] In one embodiment, such as Figure 3 and Figure 4 As shown, the powertrain 10 includes a heat exchanger 400. The heat exchanger 400 is used to cool the oil after it has been filtered and purified by the integrated oil pump 300.

[0062] Currently, the oil inside the powertrain housing needs to be filtered and purified by an oil pump, a coarse filter, and a fine filter, resulting in a complex oil circuit structure, long oil circuit paths, and a large volume. In this application, the receiving groove of the powertrain housing is used to accommodate an integrated oil pump. The oil inlet of the receiving groove is distributed on the outer side of the cavity wall of the gear cavity in the housing, which is used to hold oil. By setting an oil inlet channel, one end of which is distributed inside the gear cavity and connected to the gear cavity, and the other end of which is distributed on the outer side of the cavity wall of the gear cavity and connected to the oil inlet, the oil circuit connection structure of the powertrain is simplified and the oil circuit is shortened.

[0063] The powertrain 10 provided in the embodiments of this application will be described in detail below.

[0064] Figure 5 This is a schematic diagram of an integrated oil pump 300 provided in an embodiment of this application. Figure 6 This is a cross-sectional view of the housing 100 of the powertrain 10 provided in an embodiment of this application. Figure 7 yes Figure 6 A partial enlarged view of the M1 portion of the housing 100 of the powertrain 10.

[0065] In one embodiment, such as Figures 3 to 5 As shown, the integrated oil pump 300 includes an integrated oil pump assembly 310, a first filter assembly 320, and a second filter assembly 330. The oil pump motor 311 in the oil pump assembly 310 is used to drive the oil in the gear cavity 110 to flow into the receiving tank 120, be filtered by the first filter assembly 320, and then flow through the second filter assembly 330 for further filtration.

[0066] In this embodiment, the powertrain 10 uses an integrated oil pump 300 to filter and remove impurities from the oil in the gear cavity 110. Since the integrated oil pump 300 has a small overall volume and a simple oil circuit connection structure, the path for the oil in the gear cavity 110 to undergo two filtrations after entering the receiving tank 120 is short. This helps to simplify the oil circuit connection structure of the powertrain 10, shorten the oil circuit, and facilitate the miniaturization of the powertrain 10.

[0067] In this embodiment, the oil filtered and purified by the integrated oil pump 300 is used to cool and lubricate the gear set 200. The oil used to cool and lubricate the gear set 200 can flow back to the bottom of the gear cavity 110, which facilitates the circulation of oil in the housing 100 of the powertrain 10.

[0068] The oil pump motor 311 in the oil pump assembly 310 is used to drive the oil filtered by the first filter assembly 320 to flow through the second filter assembly 330 for further filtration. The first filter assembly 320 is used to perform coarse filtration of the oil, and the second filter assembly 330 is used to perform fine filtration of the oil. The particle size of the impurities in the oil filtered by the first filter assembly 320 is larger than the particle size of the impurities in the oil filtered by the second filter assembly 330.

[0069] In one embodiment, such as Figure 4 and Figure 5 As shown, the distance between the first filter assembly 320 and the bottom 121 of the receiving tank 120 along the axial direction O1 of the receiving tank 120 is greater than the distance between the second filter assembly 330 and the bottom 121 of the receiving tank 120. Figure 4 , Figure 6 and Figure 7 As shown, the receiving tank 120 includes an oil inlet 122, which is distributed on the tank periphery 123 of the receiving tank 120. The oil inlet 122 is used to deliver oil to the first filter assembly 320.

[0070] In this embodiment, since the first filter assembly 320 is arranged away from the bottom 121 of the receiving tank 120 compared to the second filter assembly 330, and the oil inlet 122 of the receiving tank 120 is used to deliver oil to the first filter assembly 320, the oil inlet 122 is arranged on the peripheral wall 123 of the tank away from the bottom 121 of the receiving tank 120, so that the oil inlet 122 is close to the first filter assembly 320, so that the oil input into the receiving tank 120 from the oil inlet 122 can be filtered by the first filter assembly 320 more quickly with a short path, and the oil circuit connection structure is simple.

[0071] In one embodiment, such as Figure 2 , Figure 6 and Figure 7 As shown, along the axial direction O1 of the receiving groove 120, the oil inlet 122 is distributed on the outer side of the cavity wall 110a of the gear cavity 110. The housing 100 of the powertrain 10 includes an oil inlet channel 130. One end 131 of the oil inlet channel 130 is distributed inside the gear cavity 110 and is used to connect the gear cavity 110. The other end 132 of the oil inlet channel 130 is distributed on the outer side of the cavity wall 110a of the gear cavity 110 and is used to connect the oil inlet 122.

[0072] In this embodiment, since the oil inlet 122 is located outside the cavity wall 110a of the gear cavity 110, the oil inlet 122 cannot directly suck up the oil in the gear cavity 110. By setting up an oil inlet channel 130, one end 131 of the oil inlet channel 130 is connected to the gear cavity 110, and the other end 132 of the oil inlet channel 130 extends to the outside of the cavity wall 110a of the gear cavity 110 and communicates with the oil inlet 122, thereby realizing the delivery of the oil in the gear cavity 110 to the receiving tank 120.

[0073] In one embodiment, such as Figure 2 and Figure 4 As shown, the oil inlet channel 130 and the receiving groove 120 are arranged adjacent to each other along the radial direction R1 of the receiving groove 120.

[0074] In this embodiment, the oil inlet channel 130 and the receiving tank 120 are arranged adjacent to each other, so that the oil path from the oil inlet channel 130 to the receiving tank 120 is short. This simplifies the oil path of the housing 100 of the powertrain 10, reduces the power requirements of the oil pump motor 311 in the integrated oil pump 300, and makes it easier to make the oil pump motor 311 and the integrated oil pump 300 smaller, which is beneficial to the miniaturization of the powertrain 10.

[0075] In one embodiment, such as Figure 4 , Figure 6 and Figure 7As shown, the receiving tank 120 includes an oil inlet 122, which is distributed on the peripheral wall 123 of the receiving tank 120. The oil inlet 122 is used to supply oil to the first filter assembly 320. Along the axial direction O1 of the receiving tank 120, the oil inlet 122 is distributed on the outer side of the cavity wall 110a of the gear cavity 110. The oil inlet channel 130 is arranged adjacent to the receiving tank 120 along the radial direction R1 of the receiving tank 120. One end 131 of the oil inlet channel 130 is distributed inside the gear cavity 110 and is used to connect the gear cavity 110. The other end 132 of the oil inlet channel 130 is distributed on the outer side of the cavity wall 110a of the gear cavity 110 and is used to connect the oil inlet 122.

[0076] In this embodiment, since the housing 100 of the powertrain 10 has a receiving groove 120 for accommodating an integrated oil pump 300, and the second filter assembly 330 for fine filtration in the integrated oil pump 300 is arranged close to the bottom 121 of the receiving groove 120, while the first filter assembly 320 for coarse filtration is arranged away from the bottom 121 of the receiving groove 120, the oil inlet 122 of the receiving groove 120 for supplying oil to the first filter assembly 320 needs to be arranged away from the bottom 121 of the receiving groove 120. The oil inlet 122 of the receiving tank 120 for supplying oil to the first filter assembly 320 is arranged on the outside of the cavity wall 110a of the gear cavity 110. The oil in the gear cavity 110 cannot be directly supplied to the oil inlet 122. Instead, an oil inlet channel 130 is provided, with one end 131 of the channel located inside the gear cavity 110 and the other end 132 located on the outside of the cavity wall 110a. The oil inlet channel 130 is connected to the gear cavity 110a via one end 131. 10. The other end 132 of the oil inlet channel 130 is connected to the oil inlet 122, so that the oil in the gear cavity 110 can be transported to the oil inlet 122 of the receiving tank 120 through the oil inlet channel 130. The oil circuit connection structure is simple, and the oil inlet channel 130 and the receiving tank 120 are arranged adjacent to each other along the radial direction R1 of the receiving tank 120, which makes the oil circuit path short, the oil flow resistance small, and the distance between the oil inlet channel 130 and the receiving tank 120 close. It also helps to reduce the volume of the housing 100 of the powertrain 10.

[0077] In one embodiment, such as Figure 4 and Figure 6 As shown, the axial direction of the oil inlet channel 130 is parallel to the axial direction O1 of the receiving groove 120.

[0078] In this embodiment, the oil inlet channel 130 and the receiving groove 120 are arranged adjacent to each other in parallel, which shortens the path for the oil inlet channel 130 to deliver oil to the oil inlet 122 located on the outer side of the cavity wall 110a of the gear cavity 110. This also simplifies the structure of the oil inlet channel 130. The axial direction of the oil inlet channel 130 is parallel to the axial direction O1 of the receiving groove 120, which also ensures that the draft directions of the oil inlet channel 130 and the receiving groove 120 are consistent during the die casting process of the powertrain housing 100, simplifying the process.

[0079] In one embodiment, such as Figure 6 and Figure 7 As shown, along the axial direction O1 of the receiving groove 120, the length of the oil inlet channel 130 is less than or equal to the length of the receiving groove 120, and the maximum distance between the other end 132 of the oil inlet channel 130 and the bottom 121 of the receiving groove 120 is less than or equal to the depth of the receiving groove 120.

[0080] In this embodiment, the shorter length of the oil inlet channel 130 results in a shorter flow path between the gear cavity 110 and the oil inlet 122, which helps to shorten the oil passage. It also allows for the use of less material to form the oil inlet channel 130, saving material.

[0081] In this embodiment, a portion of the groove peripheral wall 1230 of the receiving groove 120 is distributed along the axial direction O1 of the receiving groove 120 on the outside of the cavity wall 110a of the gear cavity 110. The maximum distance between the other end 132 of the oil inlet channel 130 distributed on the outside of the cavity wall 110a of the gear cavity 110 and the bottom 121 of the receiving groove 120 is small, so that the other end 132 of the oil inlet channel 130 does not protrude from the groove opening 124 of the receiving groove 120. Thus, the oil inlet channel 130 does not occupy additional space outside the axial direction O1 of the receiving groove 120, which is distributed on the outside of the gear cavity 110, and the volume of the powertrain 10 is small.

[0082] Figure 8 yes Figure 6 A partial enlarged view of the M2 portion of the housing 100 of the powertrain 10.

[0083] In one embodiment, such as Figures 6 to 8 As shown, one end 131 of the oil inlet channel 130 includes an inlet 1310, which is used to connect to the gear cavity 110. A portion 111 of the cavity wall 110a of the gear cavity 110 is used to block the lower part 1311 of the inlet 1310. A step 140 is formed between the upper surface 1110 of the portion 111 of the cavity wall 110a of the gear cavity 110 and the inner wall surface 133 of the oil inlet channel 130.

[0084] In this embodiment, a portion 111 of the cavity wall 110a of the gear cavity 110 blocks the lower part 1311 of the inlet 1310 at one end 131 of the oil inlet channel 130, allowing the inlet 1310 of the oil inlet channel 130 to be located at the bottom of the gear cavity 110. This facilitates the flow of oil from one end 131 of the oil inlet channel 130 into the oil inlet 122 of the receiving groove 120. A step 140 is formed between the upper surface 1110 of the portion 111 of the cavity wall 110a of the gear cavity 110 and the inner wall surface 133 of the oil inlet channel 130, facilitating the introduction of oil entering from the inlet 1310 into the interior of the oil inlet channel 130, thus improving the oil flow rate. The step 140 structure also helps reduce oil accumulation at the inlet 1310 of the oil inlet channel 130, reducing oil flow resistance.

[0085] Figure 9 This is a partial cross-sectional view of the housing 100 of the powertrain 10 provided in this application embodiment.

[0086] In one embodiment, such as Figure 9 As shown. The upper surface 1110 of a portion 111 of the cavity wall 110a of the gear cavity 110 is an inclined surface or an arc-shaped surface, which extends inclinedly downward from the gear cavity 110 into the oil inlet channel 130.

[0087] In this embodiment, the inclined or arc-shaped upper surface can guide the oil in the gear cavity 110 to smoothly cross the step 140 and enter the oil inlet channel 130, avoiding eddies or resistance caused by abrupt right-angle changes and reducing oil flow resistance. Lower oil flow resistance reduces the power requirements of the oil pump motor 311, making it easier to miniaturize the oil pump motor 311, reducing the size of the integrated oil pump 300, and thus reducing the size of the powertrain 10.

[0088] In one embodiment, a portion 111 of the cavity wall 110a of the gear cavity 110 is used to block the lower part 1311 of the inlet 1310 distributed at one end 131 of the oil inlet channel 130. The inlet 1310 is used to connect the gear cavity 110. A step 140 is formed between the upper surface 1110 of the portion 111 of the cavity wall 110a of the gear cavity 110 and the inner wall surface of the oil inlet channel 130. The upper surface 1110 of the portion 111 of the cavity wall 110a of the gear cavity 110 is an inclined surface or an arc-shaped surface. The inclined surface or arc-shaped surface extends inclinedly downward from the gear cavity 110 into the oil inlet channel 130.

[0089] In this embodiment of the application, by designing the part of the gear cavity wall that connects to the inlet of the oil inlet channel as a gentle step, the inlet of the oil inlet channel is located at the bottom of the gear cavity, so that the oil in the gear cavity can be smoothly introduced into the oil inlet channel with less flow resistance.

[0090] In one embodiment, such as Figure 4 and Figure 7 As shown, the oil inlet channel 130 includes an inlet 1310 and two outlets 1312 and 1313. The inlet 1310 is located at one end 131 of the oil inlet channel 130 and is used to connect the gear cavity 110 and the oil inlet channel 130. The two outlets 1312 and 1313 are located at the other end 132 of the oil inlet channel 130. One outlet 1312 is used to connect the oil inlet channel 130 and the oil inlet 122, and the other outlet 1313 is used to accommodate the sealing member 135. The sealing member 135 and the outlet 1312 are arranged alternately.

[0091] In this embodiment, two outlets 1312 and 1313 are located at the other end 132 of the oil inlet channel 130. One outlet 1312 connects the oil inlet channel 130 and the oil inlet 122, while the other outlet 1313 accommodates the sealing member 135, preventing oil in the oil inlet channel 130 from leaking from the other outlet 1313. The sealing member 135 is spaced apart from one outlet 1312, ensuring that the sealing member 135 extending into the oil inlet channel 130 from the other outlet 1313 will not block one outlet 1312, thus guaranteeing that the oil in the oil inlet channel 130 is smoothly transported through one outlet 1312 to the oil inlet 122 and the receiving tank 120.

[0092] In one embodiment, such as Figure 4 and Figure 7 As shown, the axial direction of the oil inlet channel 130 is parallel to the axial direction O1 of the receiving groove 120. The inlet 1310 of the oil inlet channel 130 is located at one end 131 of the oil inlet channel 130, and the two outlets 1312 and 1313 of the oil inlet channel 130 are located at the other end 132 of the oil inlet channel 130. One outlet 1312 is used to connect the oil inlet channel 130 and the oil inlet 122. The other outlet 1313 is arranged opposite to the inlet 1310 of the oil inlet channel 130 along the axial direction O1 of the receiving groove 120. The other outlet 1313 is used to accommodate the sealing component 135, and the opening direction of the other outlet 1313 is in the same direction as the groove opening 124 of the receiving groove 120. This allows the oil inlet channel 130 to be formed by demolding outward from the other outlet 1313 during the die casting process of the housing 100 of the powertrain 10, simplifying the process.

[0093] In one embodiment, such as Figure 4 As shown, the distance between an outlet 1312 and an inlet 122 is less than the distance between the inlet 1310 and an outlet 1312 of the inlet channel 130.

[0094] In this embodiment, the distance between the oil inlet 122 and one outlet 1312 is small, resulting in a short oil path for the oil in the oil inlet channel 130 to be output from one outlet 1312 to the oil inlet 122 of the receiving tank 120. One outlet 1312 is used to connect the oil inlet 122. The distance between the inlet 1310 and one outlet 1312 of the oil inlet channel 130 is large, which facilitates the oil inlet channel 130 extending a sufficient distance from inside the gear cavity 110 to outside the gear cavity 110 to deliver oil to the oil inlet 122, so that the oil in the gear cavity 110 can be smoothly delivered to the receiving tank 120 for filtration and impurity removal.

[0095] In one embodiment, when the oil in the housing 100 of the powertrain 10 needs to be replaced, the plug 135 housed in the other outlet 1313 of the oil inlet channel 130 can be pulled out, and the other outlet 1313 of the oil inlet channel 130 can be reused to achieve the oil draining function.

[0096] In one embodiment, such as Figure 2 As shown, the housing 100 is used to fix the magnet 500, which is used to adsorb impurities in the oil. The magnet 500 is distributed in the gear cavity 110 and on the side of the bottom 121 of the receiving groove 120 away from its opening 124. One end 131 of the oil inlet channel 130 faces the magnet 500. The end 131 of the oil inlet channel 130 and the magnet 500 are arranged at intervals along at least one of the axial direction O1 or radial direction R1 of the receiving groove 120.

[0097] In this embodiment, one end 131 of the oil inlet channel 130 is distributed in the gear cavity 110 and faces the magnet 500. The oil inlet channel 130 and the magnet 500 are spaced apart along at least one of the axial direction O1 or radial direction R1 of the receiving groove 120, so that the oil inlet channel 130 is not blocked by the magnet 500. This ensures that the oil in the gear cavity 110 can smoothly enter the oil inlet channel 130 from the oil inlet channel 130, thereby avoiding the oil pump assembly 310 in the receiving groove 120 from dry suction.

[0098] Figure 10 This is an exploded view of the integrated oil pump 300 provided in an embodiment of this application.

[0099] In one embodiment, such as Figure 4 , Figure 5 and Figure 10As shown, the integrated oil pump 300 includes an oil pump housing 340 for housing an oil pump motor 311. The oil pump housing 340 includes an inlet 341 and an outlet 342. The inlet 341 of the oil pump housing 340 is oriented radially R2 along the oil pump motor 311. A first filter assembly 320 covers the inlet 341 of the oil pump housing 340. The oil pump motor 311 drives the filtered oil from the inlet 341 into the oil pump housing 340. The outlet 342 of the oil pump housing 340 is oriented axially O2 along the oil pump motor 311. A second filter assembly 330 covers the outlet 342 of the oil pump housing 340. The oil pump motor 311 drives the oil inside the oil pump housing 340 to flow out from the outlet 342 and be filtered by the second filter assembly 330. Wherein, as... Figure 4 As shown, along the axial direction of the oil pump motor 311, the distance between the oil pump housing 340 and the bottom 121 of the receiving groove 120 is less than the distance between the oil inlet 122 and the bottom 121 of the receiving groove 120. Along the radial direction of the oil pump motor 311, the oil inlet 122, the first filter assembly 320 and the inlet 341 of the oil pump housing 340 are arranged in sequence.

[0100] In this embodiment, the distance between the oil pump housing 340 and the bottom 121 of the receiving tank 120 is smaller than the distance between the oil inlet 122 and the bottom 121 of the receiving tank 120 along the axial direction O2 of the oil pump motor 311. This allows the oil inlet 122 and the oil pump housing 340 to be arranged along the radial direction R2 of the oil pump motor 311. The close distance between the oil inlet 122 and the oil pump housing 340 allows the oil entering the receiving tank 120 from the oil inlet 122 to enter the oil pump housing 340 via a short path, simplifying the oil circuit structure.

[0101] In this embodiment, the oil inlet 122, the first filter assembly 320, and the inlet 341 of the oil pump housing 340 are arranged along the radial direction R2 of the oil pump motor 311, so that the oil in the oil inlet channel 130 can flow sequentially along the radial direction R2 of the oil pump motor 311 through the oil inlet 122, the first filter assembly 320, and the inlet 341 of the oil pump housing 340 into the oil pump housing 340, thereby simplifying the oil circuit structure and shortening the oil circuit.

[0102] In this embodiment, the inlet 341 of the oil pump housing 340 is arranged radially and the outlet 342 of the oil pump housing 340 is arranged axially. This makes the inlet 341 and outlet 342 of the oil pump housing 340 closer together, and the oil path within the oil pump housing 340 is shorter. This reduces the power requirement for the oil pump motor 311, making it easier to make the oil pump motor 311 smaller, thus making the integrated oil pump 300 smaller, and consequently, making the housing 100 of the receiving tank 120 and power assembly 10 smaller.

[0103] In this embodiment, a first filter assembly 320 for coarse filtration covers the radially outer side of the inlet 341 of the oil pump housing 340, which is used for oil inflow along the radial direction R2 of the oil pump motor 311. A second filter assembly 330 for fine filtration covers the axially outer side of the outlet 342 of the oil pump housing 340, which is used for oil outflow along the axial direction O2 of the oil pump motor 311. This allows the oil filtered by the first filter assembly 320 to flow into the oil pump housing 340 through the inlet 341 along the radial direction R2 of the oil pump motor 311. The oil inside the oil pump housing 340 can then be output from the outlet 342 along the axial direction O2 of the oil pump motor 311 and discharged from the integrated oil pump 300 after being filtered by the second filter assembly 330. This results in a simpler oil circuit connection structure and a shorter oil circuit path for the integrated oil pump 300.

[0104] The axial direction O2 of the oil pump motor 311 is the same as the axial direction O1 of the receiving groove 120, and the radial direction R2 of the oil pump motor 311 is the same as the radial direction R1 of the receiving groove 120.

[0105] In one embodiment, such as Figure 4 , Figure 5 and Figure 10 As shown, the oil pump housing 340 includes multiple through holes 343, which are distributed around the outer wall 344 of the oil pump housing 340 along the circumferential direction C of the oil pump motor 311. Each through hole 343 penetrates the outer wall 344 of the oil pump housing 340 along the radial direction R2 of the oil pump motor 311. Each through hole 343 serves as an inlet 341 of the oil pump housing 340. The first filter assembly 320 covers the multiple through holes 343. Along the axial direction O2 of the oil pump motor 311, the inner diameter of the oil inlet 122 is less than or equal to the size of the first filter assembly 320, but greater than the inner diameter of each through hole 343.

[0106] In this embodiment, the oil in the oil inlet channel 130 flows sequentially through the oil inlet 122, the first filter assembly 320, and multiple through holes 343 into the oil pump housing 340. Along the axial direction O2 of the oil pump motor 311, the inner diameter of the oil inlet 122 is smaller than or equal to the size of the first filter assembly 320. The smaller inner diameter of the oil inlet 122 allows the oil entering the receiving tank 120 from the oil inlet 122 to be directly received and filtered by the first filter assembly 320. The larger inner diameter of the oil inlet 122, the larger inner diameter of the through holes 343, facilitates the smooth input of more oil from the oil inlet channel 130 into the receiving tank 120. The smaller inner diameter of the through hole 343 allows for the arrangement of more through holes 343 on the outer wall 344 of the oil pump housing 340, resulting in a larger area of ​​the inlet 341 of the oil pump housing 340. This facilitates the oil entering from the inlet 122 to be filtered by the first filter assembly 320 and then dispersed into the oil pump housing 340 through multiple through holes 343, thereby reducing flow resistance.

[0107] In this embodiment, the inlet 341 of the oil pump housing 340 is oriented along the radial direction R2 of the oil pump motor 311. A plurality of through holes 343, which serve as the inlet 341 of the oil pump housing 340, are distributed around the outer wall 344 of the oil pump housing 340 along the circumferential direction C of the oil pump motor 311. This allows the oil in the receiving groove 120 to enter from the periphery of the oil pump housing 340 along the radial direction R2 of the oil pump motor 311, making the area of ​​the oil pump housing 340 for oil input larger and reducing the oil flow resistance.

[0108] In one embodiment, such as Figure 4 , Figure 5 and Figure 10 As shown, the receiving groove 120 is used to fix the sealing ring 125. The sealing ring 125 is distributed around the oil pump housing 340 along the circumferential direction C of the oil pump motor 311. The sealing ring 125 is used to cooperate with the oil pump housing 340 to isolate the inlet 341 and outlet of the oil pump housing 340. Specifically, along the axial direction O2 of the oil pump motor 311, the distance between the sealing ring 125 and the bottom 121 of the receiving groove 120 is greater than the distance between the outlet 342 of the oil pump housing 340 and the bottom 121 of the receiving groove 120, but less than the distance between the oil inlet 122 and the bottom 121 of the receiving groove 120.

[0109] In this embodiment, the sealing ring 125 mates with the inner wall of the receiving groove 120 and the outer wall 344 of the oil pump housing 340. Along the axial direction O2 of the oil pump motor 311, the distance between the sealing ring 125 and the bottom 121 of the receiving groove 120 is greater than the distance between the outlet 342 of the oil pump housing 340 and the bottom 121 of the receiving groove 120, but less than the distance between the oil inlet 122 and the bottom 121 of the receiving groove 120. This arrangement of the oil inlet 122, the sealing ring 125, and the outlet 342 of the oil pump housing 340 along the axial direction O2 of the oil pump motor 311 prevents the oil entering the receiving groove 120 from the oil inlet 122 from flowing into the oil output from the outlet 342 of the oil pump housing 340 after being filtered by the first filter assembly 320.

[0110] In one embodiment, such as Figure 3 and Figure 4 As shown, the receiving tank 120 includes an oil outlet 126, which is distributed on the peripheral wall 123 of the receiving tank 120. The oil outlet 126 is used to connect to the inlet 410 of the heat exchanger 400 of the powertrain 10. Along the radial direction R1 of the receiving tank 120, the second filter assembly 330, the oil outlet 126, and the inlet 410 of the heat exchanger 400 are arranged sequentially. The axial direction of the oil outlet 126 is perpendicular to the axial direction of the oil inlet channel 130.

[0111] In this embodiment, along the radial direction R1 of the receiving tank 120, the second filter assembly 330, the oil outlet 126, and the inlet 410 of the heat exchanger 400 are arranged in sequence, so that the oil after being finely filtered by the second filter assembly 330 can be directly output from the receiving tank 120 through the oil outlet 126 and enter the heat exchanger 400 from the inlet 410. This makes the oil path of the oil after being filtered by the second filter assembly 330 to the heat exchanger 400 short and the oil path connection structure simple.

[0112] In this embodiment, the axial direction of the oil outlet 126 is perpendicular to the axial direction of the oil inlet channel 130, which shortens the overall path of the oil from the oil inlet channel 130 into the receiving tank 120 for filtration and then output to the heat exchanger 400 through the oil outlet 126. This allows the receiving tank 120 and the heat exchanger 400 to be stacked, thus reducing the overall space occupied by the receiving tank 120 and the heat exchanger 400 along the axial direction O1 of the powertrain 10, which is beneficial for the miniaturization of the powertrain 10.

[0113] In one embodiment, such as Figure 4 As shown, along the axial direction O1 of the receiving groove 120, the distance between the oil inlet 122 and the oil outlet 126 of the receiving groove 120 is less than the length of the oil inlet channel 130.

[0114] In the embodiments of this application, such as Figure 4 and Figure 6As shown, the distance between the oil inlet 122 and the oil outlet 126 along the axial direction O1 of the receiving groove 120 is small, which makes the oil path in the receiving groove 120 short and the oil path structure simple. The length of the oil inlet channel 130 along the axial direction O1 of the receiving groove 120 is large, which facilitates the delivery of oil in the gear cavity 110 to the oil inlet 122 located outside the gear cavity 110 through the oil inlet channel 130.

[0115] In one embodiment, such as Figure 2 and Figure 6 As shown, the gear set 200 includes a first gear set 210 and a second gear set 220. The size of the first gear set 210 is larger than the size of the second gear set 220 along the first direction Z. The receiving groove 120 and the second gear set 220 are arranged along the first direction Z. The receiving groove 120 and the first gear set 210 are arranged along the second direction X. The gear cavity 110 includes a first part 112 and a second part 113. The first part 112 and the second part 113 are arranged along the first direction Z. The size of the second part 113 is smaller than the size of the first part 112 along the second direction X. The first part 112 is used to accommodate a part 211 of the first gear set 210 and the second gear set 220. The second part 113 is used to accommodate another part 212 of the first gear set 210, one end 131 of the oil inlet channel 130 and oil. The outer side 127 of a portion of the groove wall of the receiving groove 120 is used to form the cavity wall 1130 of the second part 113. The second direction X is parallel to the axial direction O1 of the receiving groove 120, and the first direction Z is perpendicular to the second direction X. In the second direction X, the distance between the other part 212 of the first gear set 210 and the cavity wall 1130 of the second part 113 is smaller than the size of the receiving groove 120 and smaller than the distance between the oil inlet 122 and the other part 212 of the first gear set 210.

[0116] In this embodiment, the size of the first gear set 210 along the first direction Z is larger than the size of the second gear set 220. The receiving groove 120 and the second gear set 220 are arranged along the first direction Z, and the receiving groove 120 and the first gear set 210 are arranged along the second direction X. This allows the receiving groove 120 to be arranged using the space of the gear cavity 110 occupied by the first gear set 210 more than the second gear set 220 along the first direction Z, so that the volume of the housing 100 of the powertrain 10 is smaller.

[0117] In this embodiment of the application, the first part 112 of the gear cavity 110 is used to accommodate a part 211 of the first gear set 210 and the second gear set 220, and the second part 113 is used to accommodate another part 212 of the first gear set 210, one end 131 of the oil inlet channel 130 and oil. The second part 113 is smaller in size along the second direction X, which can reduce the volume of the gear cavity 110 without affecting the arrangement of the first gear set 210 and the second gear set 220.

[0118] In this embodiment, the outer side 127 of a portion of the accommodating groove 120 forms the cavity wall 1130 of the second portion 113, which facilitates the oil in the gear cavity 110 to be transported to the accommodating groove 120 via a short path, thus simplifying the oil circuit structure.

[0119] In this embodiment, since the receiving groove 120 needs to accommodate the integrated oil pump 300 with a long axial dimension, the receiving groove 120 needs to be made deep. By designing the distance between the cavity wall 1130 of the other part 212 of the first gear set 210 and the second part 113 along the second direction X, the size of the receiving groove 120, and the distance between the oil inlet 122 and the other part 212 of the first gear set 210, the oil inlet 122 of the receiving groove 120 is arranged on the outside of the cavity wall 110a of the gear cavity 110. Therefore, an oil inlet channel 130 is needed to connect the gear cavity 110 and the oil inlet 122 so that the oil in the gear cavity 110 can be smoothly transported to the oil inlet 122 of the receiving groove 120.

[0120] In one embodiment, the powertrain 10 is a hybrid powertrain 10. The first gear set 210 is a gear set 200 of a reducer, which is used for transmission connection with the output end of the drive motor and the input end of the differential of the powertrain 10. The second gear set 220 is a gear set 200 of a speed increaser, which is used for transmission connection with the crankshaft of the engine and the rotor shaft of the generator of the powertrain 10.

[0121] In one embodiment, such as Figure 2 and Figure 6 As shown, along the first direction Z, the size of the second portion 113 along the second direction X gradually decreases from one end 1131 near the first portion 112 toward the other end 1132 away from the first portion 112. Along the second direction X, the other end 132 of the oil inlet channel 130 protrudes from the other end 1132 of the second portion 113 away from the first portion 112 along the first direction Z, extending beyond the cavity wall 1130 of the second portion 113. Along the second direction X, the oil inlet 122 is spaced apart from the other end 1132 of the second portion 113 away from the first portion 112.

[0122] In this embodiment of the application, the size of the second part 113 along the first direction Z and along the second direction X gradually decreases from one end 1131 near the first part 112 toward the other end 1132 away from the first part 112, so that the volume of the second part 113 of the gear cavity 110 is small, which is beneficial to reducing the volume of the housing 100 of the powertrain 10.

[0123] In this embodiment of the application, by making the other end 132 of the oil inlet channel 130 protrude from the second part 113 away from the first part 112 along the second direction X and along the first direction Z away from the first part 112, the oil inlet channel 130 is located at the lower part of the gear cavity 110, which facilitates the flow of oil in the oil inlet channel 130.

[0124] In this embodiment of the application, the oil inlet 122 and the other end 1132 of the second part 113 away from the first part 112 are arranged at intervals along the second direction X, so that the oil inlet 122 can be located at the lower part of the second part 113 of the gear cavity 110 along the second direction X, avoiding empty suction and facilitating the flow of oil into the receiving tank 120.

[0125] The powertrain and electric vehicle provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and embodiments of this application. The description of the embodiments above is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in specific embodiments and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A powertrain, characterized in that, The powertrain housing includes a gear cavity, a receiving groove, and an oil inlet channel. The gear cavity accommodates the gear set and oil of the powertrain. The receiving groove accommodates an integrated oil pump, which includes an integrated oil pump assembly, a first filter assembly, and a second filter assembly. The oil pump motor in the oil pump assembly drives the oil in the gear cavity to flow into the receiving groove, where it is filtered by the first filter assembly and then further filtered by the second filter assembly. Along the axial direction of the receiving groove, the distance between the first filter assembly and the bottom of the receiving groove is greater than the distance between the second filter assembly and the bottom of the receiving groove. The receiving tank includes an oil inlet, which is distributed on the peripheral wall of the receiving tank. The oil inlet is used to supply oil to the first filter assembly. Along the axial direction of the receiving tank, the oil inlet is distributed on the outer side of the cavity wall of the gear cavity. The oil inlet channel is arranged adjacent to the receiving tank along the radial direction of the receiving tank. One end of the oil inlet channel is distributed inside the gear cavity and is used to connect the gear cavity. The other end of the oil inlet channel is distributed on the outer side of the cavity wall of the gear cavity and is used to connect the oil inlet.

2. The powertrain according to claim 1, characterized in that, The axial direction of the oil inlet channel is parallel to the axial direction of the receiving groove.

3. The powertrain according to claim 2, characterized in that, Along the axial direction of the receiving groove, the length of the oil inlet channel is less than or equal to the length of the receiving groove, and the maximum distance between the other end of the oil inlet channel and the bottom of the receiving groove is less than or equal to the depth of the receiving groove.

4. The powertrain according to any one of claims 1-3, characterized in that, One end of the oil inlet channel includes an inlet for communicating with the gear cavity. A portion of the cavity wall of the gear cavity is used to block the lower part of the inlet, and a step is formed between the upper surface of the portion of the cavity wall of the gear cavity and the inner wall surface of the oil inlet channel.

5. The powertrain according to claim 4, characterized in that, The upper surface of a portion of the cavity wall of the gear cavity is an inclined surface or an arc-shaped surface, and the inclined surface or arc-shaped surface extends downwards from the gear cavity toward the interior of the oil inlet channel.

6. The powertrain according to any one of claims 1-5, characterized in that, The oil inlet channel includes one inlet and two outlets. The inlet is located at one end of the oil inlet channel and is used to connect the gear cavity and the oil inlet channel. The two outlets are located at the other end of the oil inlet channel. One outlet is used to connect the oil inlet channel and the oil inlet, and the other outlet is used to accommodate a sealing element. The sealing element is arranged at intervals from the one outlet.

7. The powertrain according to any one of claims 1-6, characterized in that, The housing is used to fix the magnets, which are used to adsorb impurities in the oil. The magnets are distributed in the gear cavity and on the side of the bottom of the receiving groove away from its opening. One end of the oil inlet channel faces the magnets, wherein: One end of the oil inlet channel is spaced apart from the magnet along at least one of the axial or radial directions of the receiving groove.

8. The powertrain according to any one of claims 1-7, characterized in that, The integrated oil pump includes an oil pump housing for housing the oil pump motor. The oil pump housing includes an inlet and an outlet. The inlet of the oil pump housing is oriented radially along the oil pump motor. A first filter assembly covers the inlet of the oil pump housing. The oil pump motor drives the filtered oil from the inlet of the oil pump housing into the oil pump housing. The outlet of the oil pump housing is oriented axially along the oil pump motor. A second filter assembly covers the outlet of the oil pump housing. The oil pump motor drives the oil inside the oil pump housing to flow out from the outlet of the oil pump housing and be filtered by the second filter assembly. Wherein: Along the axial direction of the oil pump motor, the distance between the oil pump housing and the bottom of the receiving tank is less than the distance between the oil inlet and the bottom of the receiving tank. Along the radial direction of the oil pump motor, the oil inlet, the first filter assembly, and the inlet of the oil pump housing are arranged in sequence.

9. The powertrain according to claim 8, characterized in that, The oil pump housing includes a plurality of through holes distributed around the outer wall of the oil pump housing along the circumference of the oil pump motor. Each through hole penetrates the outer wall of the oil pump housing radially through the oil pump motor, and each through hole serves as an inlet to the oil pump housing. The first filter assembly covers the plurality of through holes, wherein: Along the axial direction of the oil pump motor, the inner diameter of the oil inlet is less than or equal to the size of the first filter assembly and greater than the inner diameter of each through hole.

10. The powertrain according to any one of claims 8-9, characterized in that, The receiving groove is used to fix the sealing ring, which is distributed around the oil pump housing along the circumference of the oil pump motor. The sealing ring is used to cooperate with the oil pump housing to isolate the inlet and outlet of the oil pump housing, wherein: Along the axial direction of the oil pump motor, the distance between the sealing ring and the bottom of the receiving groove is greater than the distance between the outlet of the oil pump housing and the bottom of the receiving groove, but less than the distance between the oil inlet and the bottom of the receiving groove.

11. The powertrain according to any one of claims 1-10, characterized in that, The receiving tank includes an oil outlet, which is distributed on the peripheral wall of the receiving tank. The oil outlet is used to connect to the inlet of the heat exchanger of the powertrain, wherein: Along the radial direction of the receiving tank, the second filter assembly, the oil outlet, and the inlet of the heat exchanger are arranged in sequence; The axial direction of the oil outlet is perpendicular to the axial direction of the oil inlet channel.

12. The powertrain according to claim 11, characterized in that, Along the axial direction of the receiving groove, the distance between the oil inlet and the oil outlet of the receiving groove is less than the length of the oil inlet channel.

13. The powertrain according to any one of claims 1-12, characterized in that, The gear set includes a first gear set and a second gear set. Along a first direction, the size of the first gear set is larger than the size of the second gear set. The receiving groove is arranged with the second gear set along the first direction, and the receiving groove is arranged with the first gear set along a second direction. The gear cavity includes a first part and a second part, arranged along the first direction. Along the second direction, the size of the second part is smaller than the size of the first part. The first part is used to accommodate a portion of the first gear set and the second gear set. The second part is used to accommodate another portion of the first gear set, one end of the oil inlet channel, and the oil. A portion of the outer wall of the receiving groove forms the cavity wall of the second part. The second direction is parallel to the axial direction of the receiving groove, and the first direction is perpendicular to the second direction, wherein: Along the second direction, the distance between the other part of the first gear set and the cavity wall of the second part is less than the size of the receiving groove and less than the distance between the oil inlet and the other part of the first gear set.

14. The powertrain according to claim 13, characterized in that, Along the first direction, the size of the second portion gradually decreases from one end closer to the first portion toward the other end farther from the first portion, wherein: Along the second direction, the other end of the oil inlet channel protrudes from the second portion away from the first portion along the first direction from the cavity wall of the second portion; Along the second direction, the oil inlet is spaced apart from the other end of the second portion away from the first portion.

15. An electric vehicle, characterized in that, The electric vehicle includes wheels and a powertrain as described in any one of claims 1-14, the powertrain being used to drive the wheels.

Images