An electric motor assembly and a hybrid transmission

Abstract

The present invention relates to the technical field of hybrid electric vehicles, and more particularly, to an electric motor assembly and a hybrid transmission. An embodiment of the present invention provides an electric motor assembly for a hybrid transmission, which includes a motor water jacket and a motor housing. The motor water jacket is assembled within the motor housing. A first oil return hole is provided on the motor water jacket, and the motor housing is provided with a second oil return hole and an oil return passage communicating with the second oil return hole; the first oil return hole is communicated with the second oil return hole to form an oil passage for the lubricating oil in the motor housing to flow. This electric motor assembly can effectively reduce the thermal load of the motor, thereby reducing the drag torque when the motor rotor rotates and improving the operating efficiency of the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of hybrid electric vehicles, and more particularly, to an electric motor assembly and a hybrid transmission. Background Art

[0002] The hybrid transmission assembly consists of an electromechanical coupling module and a conventional transmission.

[0003] Currently, during the long-term operation of the electromechanical coupling module of mainstream hybrid transmission products, it is easy to cause a high thermal load on the motor, thereby affecting its working efficiency. Summary of the Invention

[0004] The objectives of the present invention include, for example, providing an electric motor assembly that can effectively reduce the thermal load of the motor, thereby reducing the drag torque during the rotation of the motor rotor and improving the operating efficiency of the motor.

[0005] The present invention also aims to provide a hybrid transmission that can reduce the thermal load of the motor in the hybrid transmission by adopting the above-mentioned electric motor assembly, thereby improving the operating efficiency of the hybrid transmission.

[0006] The embodiments of the present invention can be implemented as follows:

[0007] An embodiment of the present invention provides an electric motor assembly for a hybrid transmission, which includes a motor water jacket and a motor housing, and the motor water jacket is assembled inside the motor housing;

[0008] The motor water jacket is provided with a first oil return hole, and the motor housing is provided with a second oil return hole and an oil return channel communicating with the second oil return hole; the first oil return hole is communicated with the second oil return hole to form an oil path for the lubricating oil in the motor housing to flow.

[0009] Optionally, the axes of the first oil return hole and the second oil return hole coincide, and the diameter of the first oil return hole is smaller than that of the second oil return hole.

[0010] Optionally, along the axial direction of the motor water jacket, the outer periphery of the motor water jacket is sequentially provided with a first outer peripheral surface, a second outer peripheral surface, and a third outer peripheral surface, and the outer diameters corresponding to the first outer peripheral surface, the second outer peripheral surface, and the third outer peripheral surface increase in sequence;

[0011] Along the axial direction of the motor water jacket, the inner wall of the motor housing is sequentially provided with a first inner peripheral surface, a second inner peripheral surface, and a third inner peripheral surface, and the inner diameters corresponding to the first inner peripheral surface, the second inner peripheral surface, and the third inner peripheral surface increase in sequence;

[0012] Moreover, the first outer peripheral surface corresponds and mates with the first inner peripheral surface, the second outer peripheral surface corresponds and mates with the second inner peripheral surface, and the third outer peripheral surface corresponds and mates with the third inner peripheral surface; the orifice of the first oil return hole for communicating with the second oil return hole is located on the third outer peripheral surface.

[0013] Optionally, along the axis of the motor water jacket, at least one groove is provided on the second outer peripheral surface, and the groove is used to cooperate with the second inner peripheral surface to form a coolant cavity;

[0014] The motor housing further includes a water inlet pipeline and a water outlet pipeline communicating with the coolant cavity, and the orifices of the water inlet pipeline and the water outlet pipeline for communicating with the coolant cavity are both located on the second inner peripheral surface and correspond to the groove.

[0015] Optionally, three sealing rings are further provided between the mating surfaces of the motor water jacket and the motor housing;

[0016] Along the axis direction of the motor water jacket, the groove and the orifice of the first oil return hole are located between two of the sealing rings, and the other sealing ring is located between the groove and the orifice of the first oil return hole.

[0017] Optionally, one sealing ring is respectively arranged on the first outer peripheral surface, the second outer peripheral surface and the third outer peripheral surface; and annular grooves for installing the sealing rings are provided on the first outer peripheral surface, the second outer peripheral surface and the third outer peripheral surface.

[0018] Optionally, the motor assembly includes a high-voltage wiring and a low-voltage wiring; along the axis direction of the motor water jacket, the high-voltage wiring and the low-voltage wiring are located on opposite sides of the motor water jacket; and the outgoing line direction of the high-voltage wiring is perpendicular to the axis direction of the motor water jacket.

[0019] Optionally, a high-voltage outlet and a low-voltage outlet are provided on the motor housing; two installation grooves are respectively provided at the high-voltage outlet and the low-voltage outlet, and plug-in structures for connecting with external connectors are provided in both installation grooves.

[0020] Optionally, along the axis direction of the motor water jacket, the motor housing includes a first end and a second end, the first end is used to connect with the engine, and the second end is used to connect with the housing of the transmission;

[0021] A plurality of connecting bolts are provided on the end surface of the first end, and the connecting bolts are used to connect the engine and the motor housing, and the plurality of connecting bolts are arranged annularly along the axis direction of the motor water jacket.

[0022] An embodiment of the present invention further provides a hybrid transmission, which includes a transmission and the above-mentioned motor assembly;

[0023] The transmission is connected to the motor assembly.

[0024] The beneficial effects of the motor assembly and the hybrid transmission of the embodiments of the present invention include, for example:

[0025] The motor assembly can form an oil passage for the lubricating oil to flow inside the motor assembly through the oil return holes provided on the motor water jacket and the motor housing, so as to improve the circulation efficiency of the lubricating oil inside the motor water jacket and reduce the temperature of the lubricating oil, thereby reducing the heat load of the motor and reducing the drag torque when the motor rotor rotates, and improving the operating efficiency of the hybrid transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0027] Figure 1 It is a schematic structural diagram of the motor assembly in the embodiment of the present invention;

[0028] Figure 2 It is a schematic diagram of the arrangement of the first oil return hole and the second oil return hole in the embodiment of the present invention;

[0029] Figure 3 It is a schematic diagram of the connection of the first oil return hole, the second oil return hole and the oil return passage in the embodiment of the present invention;

[0030] Figure 4 It is a cross-sectional view of the connection surface between the motor housing and the motor water jacket in the embodiment of the present invention;

[0031] Figure 5 It is a schematic diagram of the arrangement of the bolt holes in the embodiment of the present invention;

[0032] Figure 6 It is a schematic structural diagram of the hybrid transmission in the embodiment of the present invention;

[0033] Figure 7 It is a schematic diagram of the arrangement of the low-voltage wiring in the embodiment of the present invention;

[0034] Figure 8 It is a schematic structural diagram of the fixing plate in the embodiment of the present invention;

[0035] Figure 9 It is a schematic diagram of the arrangement of the high-voltage wiring in the embodiment of the present invention.

[0036] Icons: 100 - Motor assembly; 200 - Hybrid transmission; 101 - First end; 102 - Second end; 110 - Motor water jacket; 120 - Motor housing; 111 - First oil return hole; 112 - First outer peripheral surface; 113 - Second outer peripheral surface; 114 - Third outer peripheral surface; 115 - Groove; 116 - Bolt hole; 121 - Second oil return hole; 122 - Oil return passage; 123 - First inner peripheral surface; 124 - Second inner peripheral surface; 125 - Third inner peripheral surface; 130 - Coolant cavity; 140 - Sealing ring; 141 - Annular groove; 152 - High-voltage connection; 151 - Low-voltage connection; 153 - Low-voltage outlet; 154 - High-voltage outlet; 155 - High-voltage terminal block; 210 - Transmission; 160 - Plug-in structure; 161 - Low-voltage plug; 162 - Fixed plate; 163 - Sealing block; 164 - Sealing cover plate; 165 - First fixed plate; 166 - Second fixed plate. Detailed implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Generally, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0039] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0040] In the description of the present invention, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0041] In addition, if terms such as "first", "second", etc. are only used for distinguishing descriptions, they cannot be understood as indicating or implying relative importance.

[0042] It should be noted that, without conflict, the features in the embodiments of the present invention can be combined with each other.

[0043] Please refer to Figures 1 - 3 , Figure 1 which shows the structure of the motor assembly in the embodiment of the present invention, Figure 2 which shows the settings of the first oil return hole and the second oil return hole in the embodiment of the present invention, Figure 3 which shows the connection of the first oil return hole, the second oil return hole and the oil return channel in the embodiment of the present invention; The present embodiment provides a motor assembly 100 for a hybrid transmission 200, which includes a motor water jacket 110 and a motor housing 120, and the motor water jacket 110 is assembled inside the motor housing 120.

[0044] A first oil return hole 111 is provided on the motor water jacket 110, and a second oil return hole 121 and an oil return channel 122 communicated with the second oil return hole 121 are provided on the motor housing 120; the first oil return hole 111 is communicated with the second oil return hole 121 to form an oil path for the lubricating oil in the motor housing 120 to flow.

[0045] It should be noted that when assembling the motor water jacket 110, its assembly method can be the same as that in the prior art, and it can be press-fitted by an interference fit method and fixed by bolts. In addition, other structures of the motor assembly 100, such as a motor rotor and a motor stator, are also provided inside the motor water jacket 110.

[0046] Please refer to Figures 1 - 3 , according to a motor assembly 100 provided by the present embodiment, the working principle of the motor assembly 100 is:

[0047] The motor assembly 100 can form an oil path for the lubricating oil in the motor assembly 100 to flow through the oil return holes provided on the motor water jacket 110 and the motor housing 120, so as to improve the circulation efficiency of the lubricating oil inside the motor water jacket 110 and reduce the temperature of the lubricating oil, thereby being able to reduce the thermal load of the motor and reduce the drag torque when the motor rotor rotates, and improve its operating efficiency.

[0048] Please refer to Figure 3, It should be noted that the motor water jacket 110 is installed inside the motor housing 120. The motor stator and the motor water jacket 110 are assembled together. After the clutch is assembled with the motor rotor, it is press-fitted inside the motor water jacket 110 (with the motor stator). When the clutch rotates, the high-temperature lubricating oil inside it will splash out. Without the oil return oil path composed of the first oil return hole 111 and the second oil return hole 121, the high-temperature lubricating oil will be stored in the cavity inside the motor water jacket 110, and there will be problems with difficult discharge. Therefore, by setting up the oil return oil path composed of the first oil return hole 111 and the second oil return hole 121, and arranging the first oil return hole 111 and the second oil return hole 121 at the lowest point in the gravity direction, the internal lubricating oil can easily flow out, thereby increasing the circulation efficiency of the high-temperature lubricating oil.

[0049] In addition, to make the lubricating oil flow more easily to the first oil return hole 111, when the motor assembly 100 is assembled and in use, the first oil return hole 111 is relatively located at the lower part of the motor water jacket 110 in the gravity direction. Similarly, the second oil return hole 121 communicated with the first oil return hole 111, and the oil return passage 122 communicated with the second oil return hole 121 are all relatively located at the lower part of the motor housing 120 in the gravity direction to be correspondingly communicated with the first oil return hole 111 and form an oil path.

[0050] A motor assembly 100 provided in this embodiment has at least the following advantages:

[0051] This motor assembly 100 can effectively reduce the thermal load of the motor, reduce the drag torque when the motor rotor rotates, and improve the operating efficiency of the motor.

[0052] Further, please refer to Figure 2 and Figure 3, to improve the circulation efficiency of the lubricating oil, when setting the first oil return hole 111 and the second oil return hole 121, the first oil return hole 111 and the second oil return hole 121 can both be set as circular holes, and while the first oil return hole 111 is communicated with the second oil return hole 121, the axes of the first oil return hole 111 and the second oil return hole 121 coincide, so as to increase the conduction area between the first oil return hole 111 and the second oil return hole 121 and improve the flow rate of the lubricating oil in the oil circuit. In addition, the diameter of the first oil return hole 111 can be made smaller than the diameter of the second oil return hole 121, that is, while ensuring that both are at the maximum conduction area, since the motor water jacket 110 is relatively assembled in the motor housing 120, the machinable area on the motor housing 120 is larger than that of the motor water jacket 110. On this basis, by making the diameter of the second oil return hole 121, the flow rate of the lubricating oil in the second oil return hole 121 can be made greater than the flow rate of the lubricating oil in the first oil return hole 111, and then the lubricating oil pressure in the second oil return hole 121 can be made less than the lubricating oil pressure in the first oil return hole 111, so as to promote the flow of the lubricating oil in the first oil return hole 111 to the second oil return hole 121, thereby playing a role in increasing the flow rate of the lubricating oil and improving the circulation efficiency of the lubricating oil.

[0053] Further, please refer to Figure 4 , Figure 4 shows the structure of the connection surface between the motor housing and the motor water jacket in the embodiment of the present invention; when assembling the motor water jacket 110 on the motor housing 120, to improve the sealing performance of the motor assembly 100, simplify the assembly steps, and improve the assembly efficiency, when setting the motor water jacket 110 and the motor housing 120, corresponding positioning and mating structures can be provided on the mating surfaces between the motor water jacket 110 and the motor housing 120.

[0054] Specifically, along the axial direction of the motor water jacket 110, a first outer peripheral surface 112, a second outer peripheral surface 113, and a third outer peripheral surface 114 are sequentially arranged on the outer periphery of the motor water jacket 110, and the outer diameters corresponding to the first outer peripheral surface 112, the second outer peripheral surface 113, and the third outer peripheral surface 114 increase in sequence; along the axial direction of the motor water jacket 110, a first inner peripheral surface 123, a second inner peripheral surface 124, and a third inner peripheral surface 125 are sequentially arranged on the inner wall of the motor housing 120, and the inner diameters corresponding to the first inner peripheral surface 123, the second inner peripheral surface 124, and the third inner peripheral surface 125 increase in sequence.

[0055] A stepped surface can be formed by the first outer peripheral surface 112, the second outer peripheral surface 113, and the third outer peripheral surface 114 of the motor water jacket 110, and a stepped surface that mates with the outer peripheral surface of the motor water jacket 110 can be formed on the first inner peripheral surface 123, the second inner peripheral surface 124, and the third inner peripheral surface 125 of the motor housing 120. Specifically, the first outer peripheral surface 112 corresponds to and mates with the first inner peripheral surface 123, the second outer peripheral surface 113 corresponds to and mates with the second inner peripheral surface 124, and the third outer peripheral surface 114 corresponds to and mates with the third inner peripheral surface 125.

[0056] Meanwhile, please refer to Figures 1 - 4 , since stepped surfaces are provided on the mating surfaces between the motor water jacket 110 and the motor housing 120, and the first oil return hole 111 and the second oil return hole 121 are respectively provided on the motor water jacket 110 and the motor housing 120, in order to enable the first oil return hole 111 to communicate with the second oil return hole 121, along the radial direction of the motor water jacket 110, the first oil return hole 111 penetrates the motor water jacket 110, and the orifice of the first oil return hole 111 for communicating with the second oil return hole 121 is located on the third outer peripheral surface 114, while the orifice of the second oil return hole 121 for communicating with the first oil return hole 111 is located on the third inner peripheral surface and corresponds to the orifice of the first oil return hole 111, so that the first oil return hole 111 can communicate with the second oil return hole 121.

[0057] In addition, please refer to Figure 4 , to further reduce the thermal load of the motor, the motor assembly 100 further includes a cooling circuit for the coolant to flow, which includes a coolant chamber, an inlet pipeline, and an outlet pipeline. Specifically, around the axis of the motor water jacket 110, at least one groove 115 is provided on the second outer peripheral surface 113, and the groove 115 is used to cooperate with the second inner peripheral surface 124 to form a coolant cavity 130; and the inlet pipeline and the outlet pipeline are provided on the motor housing 120. In order to enable the inlet pipeline and the outlet pipeline to communicate with the coolant cavity 130, the orifices of the inlet pipeline and the outlet pipeline for communicating with the coolant cavity 130 are both located on the second inner peripheral surface 124 and correspond to the groove 115.

[0058] It can be seen from the above content, please refer to Figure 4 , in this embodiment, to reduce the thermal load of the motor, the method adopted is to improve the circulation efficiency of the lubricating oil and set up a coolant circuit, and the oil return structure of the lubricating oil and the circuit structure of the coolant are both relatively arranged between the mating surfaces of the motor water jacket 110 and the motor housing 120. Therefore, in order to prevent the sealing performance between the motor water jacket 110 and the motor housing 120 and prevent the leakage of the lubricating oil and the coolant, especially to avoid the situation of cross-flow of the lubricating oil and the coolant, a sealing structure is also provided between the mating surfaces of the motor water jacket 110 and the motor housing 120.

[0059] Specifically, the sealing structure includes three sealing rings 140 disposed between the mating surfaces of the motor water jacket 110 and the motor housing 120. Among them, in order to increase the sealing performance of the mating between the motor water jacket 110 and the motor housing 120 through the three sealing rings 140, avoid the leakage of lubricating oil and coolant, and avoid the cross-flow of lubricating oil and coolant, along the axial direction of the motor water jacket 110, the groove 115 and the orifice of the first oil return hole 111 are located between two of the sealing rings 140, and the other sealing ring 140 is located between the groove 115 and the orifice of the first oil return hole 111. That is, one of the sealing rings 140 seals one end of the coolant circuit and the lubricating oil circuit between the mating surfaces of the motor water jacket 110 and the motor housing 120, and then the other two sealing rings 140 seal the other end of the coolant circuit and the lubricating oil circuit between the mating surfaces of the motor water jacket 110 and the motor housing 120. Thus, the sealing performance of the coolant circuit and the lubricating oil circuit structure between the mating surfaces of the motor water jacket 110 and the motor housing 120, as well as the sealing performance of the mating surface between the motor water jacket 110 and the motor housing 120, can be ensured.

[0060] Further, in this embodiment, one sealing ring 140 can be respectively arranged on the first outer peripheral surface 112, the second outer peripheral surface 113, and the third outer peripheral surface 114; and in order to facilitate the installation of the sealing ring 140, annular grooves 141 for installing the sealing ring 140 are provided on the first outer peripheral surface 112, the second outer peripheral surface 113, and the third outer peripheral surface 114. In addition, in other embodiments of the present invention, annular grooves 141 for installing the sealing ring 140 can also be provided on the first inner peripheral surface 123, the second inner peripheral surface 124, and the third inner peripheral surface 125; or annular grooves 141 for installing the sealing ring 140 are simultaneously provided on the first outer peripheral surface 112, the second outer peripheral surface 113, the third outer peripheral surface 114, the first inner peripheral surface 123, the second inner peripheral surface 124, and the third inner peripheral surface 125, and the annular grooves 141 on the first outer peripheral surface 112 and the first inner peripheral surface 123 are used to cooperate with each other to install one sealing ring 140, the annular grooves 141 on the second outer peripheral surface 113 and the second inner peripheral surface 124 are used to cooperate with each other to install one sealing ring 140, and the annular grooves 141 on the third outer peripheral surface 114 and the third inner peripheral surface 125 are used to cooperate with each other to install one sealing ring 140. It should be noted that on this basis, the motor water jacket 110 is also provided with a shoulder for facilitating assembly.

[0061] In this embodiment, please refer to Figure 5 and Figure 6 , Figure 5 which shows the arrangement manner of the bolt holes in the embodiment of the present invention. Figure 6The structure of the hybrid transmission in the embodiment of the present invention is shown; along the axial direction of the motor water jacket 110, the motor housing 120 includes a first end 101 and a second end 102. The first end 101 is used to connect with the engine, and the second end 102 is used to connect with the housing of the transmission 210. To improve the connection stability between the engine and the motor housing 120, a plurality of connecting bolts and bolt holes 116 for assembling the connecting bolts are provided on the end face of the first end 101. The connecting bolts are used to connect the engine and the motor housing 120, and the plurality of connecting bolts are arranged annularly around the axial direction of the motor water jacket 110. By optimizing the design of the bottom (gravity direction) of the motor housing 120, the arrangement of the bolt holes 116 is extended outward, thereby improving the stiffness of the connection mode of the motor assembly 100.

[0062] Further, please refer to Figure 7 and Figure 8 , Figure 7 which shows the structure of the low-voltage wiring in the embodiment of the present invention, Figure 8 which shows the structure of the fixing plate in the embodiment of the present invention; the motor assembly 100 further includes a high-voltage wiring 152 and a low-voltage wiring 151. To reduce the interference of the high-voltage circuit in the motor assembly 100 to the low-voltage circuit, along the axial direction of the motor water jacket 110, the high-voltage wiring 152 and the low-voltage wiring 151 are located on opposite sides of the motor water jacket 110, and the outgoing direction of the high-voltage wiring 152 is perpendicular to the axial direction of the motor water jacket 110.

[0063] Please refer to Figure 9 , Figure 9 which shows the structure of the high-voltage wiring in the embodiment of the present invention; and the high-voltage wiring 152 is located at the other end of the motor water jacket 110, that is, relatively located at the second end 102 of the motor housing 120, and the outgoing line of the high-voltage wiring 152 is perpendicular to the axial direction of the motor water jacket 110. The three-phase copper wires of the motor are in contact with the copper wires in the high-voltage wiring seat 155 and tightened by bolts, and the high-voltage wiring seat 155 and the three-phase wires are tightened by bolts. By providing the high-voltage wiring seat 155, the high-voltage outgoing line can be changed to a radial outgoing line.

[0064] In addition, to facilitate the connection between the high-voltage wiring 152 and the low-voltage wiring 151 and the external circuit, a high-voltage outlet 154 and a low-voltage outlet 153 are provided on the motor housing 120; and two installation slots are respectively provided at the high-voltage outlet 154 and the low-voltage outlet 153, and a plug-in structure 160 for connecting with an external joint is provided in both installation slots.

[0065] When arranging the low-voltage wiring 151, a low-voltage outlet 153 is formed by opening a window on the outer side surface (located on the motor input side) of the first end 101 of the motor housing 120, and an installation groove is designed at the low-voltage outlet 153 for assembling the plug-in structure 160 of the low-voltage wiring 151. The plug-in structure 160 includes a fixing plate 162, a sealing block 163, a low-voltage plug-in 161, and a sealing cover plate 164. Among them, the sealing cover plate 164 is fixed to the motor water jacket 110 by bolts. The terminal wire of the low-voltage plug-in 161 and the sealing block 163 are sealed by threading, and the sealing cover plate 164 presses the sealing block 163 to achieve the sealing between the terminal wire and the sealing block 163. Four through holes are provided on the flange of the low-voltage plug-in 161, and the flange is connected to the fixing plate 162 by four bolts. The fixing plate 162 is of a two-piece combined type, namely a first fixing plate 165 and a second fixing plate 166. The first fixing plate 165 is fixed to the motor housing 120 by two fixing plate 162 bolts, and the second fixing plate 166 is fixed to the motor housing 120 by two bolts. The first fixing plate 165 and the second fixing plate 166 form the fixing plate 162 assembly to achieve the function of the integral fixing plate 162.

[0066] Please refer to again Figure 6 , based on the above-mentioned motor assembly 100, this embodiment also provides a hybrid transmission, which includes a transmission 210 and the above-mentioned motor assembly 100; the transmission 210 is connected to the motor assembly 100. By adopting the above-mentioned motor assembly 100, the hybrid transmission can further reduce the motor heat load of the hybrid transmission, thereby improving the operating efficiency of the hybrid transmission.

[0067] As described above, the above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. An electric motor assembly for a hybrid transmission, characterized in that: The electric motor assembly includes a motor water jacket and a motor housing, and the motor water jacket is assembled in the motor housing; A first oil return hole is provided on the motor water jacket, and the motor housing is provided with a second oil return hole and an oil return passage communicating with the second oil return hole; the first oil return hole is communicated with the second oil return hole to form an oil passage for the lubricating oil in the motor housing to flow; The axes of the first oil return hole and the second oil return hole coincide, and the diameter of the first oil return hole is smaller than the diameter of the second oil return hole; Along the axis direction of the motor water jacket, the motor housing includes a first end and a second end, the first end is used to connect with the engine, and the second end is used to connect with the housing of the transmission; A plurality of connecting bolts are provided on the end face of the first end, and the connecting bolts are used to connect the engine and the motor housing, and the plurality of connecting bolts are arranged annularly around the axis direction of the motor water jacket; Along the axis direction of the motor water jacket, a first outer peripheral surface, a second outer peripheral surface and a third outer peripheral surface are sequentially arranged on the outer periphery of the motor water jacket, and the outer diameters corresponding to the first outer peripheral surface, the second outer peripheral surface and the third outer peripheral surface increase in sequence; Along the axis direction of the motor water jacket, a first inner peripheral surface, a second inner peripheral surface and a third inner peripheral surface are sequentially arranged on the inner wall of the motor housing, and the inner diameters corresponding to the first inner peripheral surface, the second inner peripheral surface and the third inner peripheral surface increase in sequence; And the first outer peripheral surface is correspondingly matched with the first inner peripheral surface, the second outer peripheral surface is correspondingly matched with the second inner peripheral surface, and the third outer peripheral surface is correspondingly matched with the third inner peripheral surface; the orifice of the first oil return hole for communicating with the second oil return hole is located on the third outer peripheral surface.

2. The electric motor assembly according to claim 1, characterized in that: Around the axis of the motor water jacket, at least one groove is provided on the second outer peripheral surface, and the groove is used to cooperate with the second inner peripheral surface and form a coolant cavity; The motor housing further includes a water inlet pipe and a water outlet pipe communicating with the coolant cavity, and the orifices of the water inlet pipe and the water outlet pipe for communicating with the coolant cavity are both located on the second inner peripheral surface and correspond to the groove.

3. The electric motor assembly according to claim 2, characterized in that: Three sealing rings are further provided between the mating surfaces of the motor water jacket and the motor housing; Along the axis direction of the motor water jacket, the groove and the orifice of the first oil return hole are located between two of the sealing rings, and the other sealing ring is located between the groove and the orifice of the first oil return hole.

4. The electric motor assembly according to claim 3, characterized in that: One of the sealing rings is arranged on each of the first outer peripheral surface, the second outer peripheral surface and the third outer peripheral surface; and annular grooves for installing the sealing rings are provided on the first outer peripheral surface, the second outer peripheral surface and the third outer peripheral surface.

5. The electric motor assembly according to claim 1, characterized in that: The motor assembly includes a high-voltage connection and a low-voltage connection; along the axial direction of the motor water jacket, the high-voltage connection and the low-voltage connection are located on opposite sides of the motor water jacket; and the outgoing direction of the high-voltage connection is perpendicular to the axial direction of the motor water jacket.

6. The motor assembly according to claim 5, wherein: A high-voltage outlet and a low-voltage outlet are provided on the motor housing; two mounting grooves are respectively provided at the high-voltage outlet and the low-voltage outlet, and the two mounting grooves are both provided with plugging structures connected to external connectors.

7. A hybrid transmission, wherein: The hybrid transmission includes a transmission and the motor assembly according to any one of claims 1-6; The transmission is connected to the motor assembly.

Images