A dual-motor hybrid transmission housing

Abstract

The present invention provides a dual-motor hybrid transmission housing including a housing body; a front end face arranged at the front end of the housing body; a rear end face arranged at the rear end of the housing body; a lower end face arranged at the lower end of the housing body; a first flange is arranged on the outer peripheral surface of the front end face, a second flange is arranged on the outer peripheral surface of the rear end face, a third flange is arranged on the outer peripheral surface of the lower end face, more than two longitudinal reinforcing ribs are arranged on the outer wall surface of the housing body, and more than two transverse reinforcing ribs are arranged on the outer wall surface of the housing body. The present invention ensures overall strength by ensuring uniform wall thickness, avoiding deep cavities and narrow areas, and suppressing housing deformation; the oil circuit design realizes cooling of the two motors and ensures that the lubricating oil inside the housing can smoothly return to the oil pan, and reasonably designs and arranges interfaces such as lubrication, cooling and oil channels on a limited housing to meet the function and reliability requirements of the entire box.

Description

Technical Field

[0001] The present invention belongs to the technical field of hybrid power systems, and in particular is a dual-motor hybrid power transmission housing. Background Art

[0002] The housing is the core component for assembling a hybrid transmission, and its main function is to accommodate and support the various components of the hybrid transmission. The hybrid system requires the integration of components such as the motor and the transmission, so the housing needs to accommodate these complex components and ensure their precise fit and efficient operation. At the same time, while ensuring strength and rigidity, the housing needs to be as light as possible to reduce the energy consumption of the vehicle. In addition, the lubrication, cooling and oil channel interfaces must be reasonably designed and arranged on the limited housing to meet the functional and reliability requirements of the entire box. Therefore, in order to meet the requirements of matching different OEMs and the diversity of vehicle layout, it is a big problem to design the housing while ensuring that the strength of the housing and other connecting parts do not interfere. Summary of the invention

[0003] The present invention provides a dual-motor hybrid power transmission housing, which ensures overall strength by ensuring uniform wall thickness, avoiding deep cavities and narrow areas, and suppressing housing deformation; the oil circuit design realizes cooling of the two motors and ensures that the lubricating oil inside the housing can smoothly return to the oil pan; and the interfaces such as lubrication, cooling and oil channels are reasonably designed and arranged on a limited housing to meet the functional and reliability requirements of the entire box.

[0004] The present invention provides a dual-motor hybrid transmission housing for accommodating and installing two motors, comprising a housing body; a front end face arranged at the front end of the housing body; a rear end face arranged at the rear end of the housing body; a lower end face arranged at the lower end of the housing body; a first flange is arranged on the outer peripheral surface of the front end face, a second flange is arranged on the outer peripheral surface of the rear end face, a third flange is arranged on the outer peripheral surface of the lower end face, more than two longitudinal reinforcing ribs are arranged on the outer side wall of the housing body, and more than two transverse reinforcing ribs are arranged on the outer side wall of the housing body. In the present invention, the front end face of the housing body is a front housing connection surface, which is used to be connected to the front housing by bolts; the rear end face is a rear housing connection surface, which is used to be connected to the rear housing by bolts; the lower end face is an oil pan connection surface, which is used to be connected to the oil pan by bolts; flanges are designed on the outer peripheral surfaces of the front end face, the rear end face and the lower end face, which can effectively improve the structural strength of the bolt connection position.

[0005] Preferably, the present invention also includes a motor terminal box mounting surface arranged at the top of the shell body, one end of the longitudinal reinforcing ribs at the top of the shell body is connected to the side wall of the motor terminal box mounting surface and the other end is connected to the second flange at the top of the rear end face, one end of the longitudinal reinforcing ribs on the outer walls of both sides of the shell body is connected to the first flange and the other end is connected to the second flange, and one end of the longitudinal reinforcing ribs at the bottom of the shell body is connected to the first flange and the other end is connected to the second flange. In order to avoid the occurrence of pore shrinkage defects inside the shell body, the present invention ensures uniform wall thickness in the design of the shell body; in order to avoid mold sticking and surface thermal cracking problems, deep cavities and narrow areas are avoided in the design; in order to suppress shell deformation and ensure the overall strength of the shell, multiple longitudinal reinforcing ribs and multiple transverse reinforcing ribs are arranged at intervals on the outer wall of the shell body, so that the shell body can be smoothly demolded while taking into account the appearance, and the shell strength is further evaluated and verified by finite element calculation, and the longitudinal reinforcing ribs have a certain height, extending along the axial direction of the shell body on the outer peripheral surface of the shell body.

[0006] Preferably, the transverse reinforcing ribs are vertically arranged on the outer wall of the housing body, and the plurality of transverse reinforcing ribs are arranged at unequal intervals, and the transverse reinforcing ribs intersect with the longitudinal reinforcing ribs on the outer walls of both sides of the housing body. The present invention adopts crisscross reinforcing ribs, which can effectively reduce the vibration generated by the housing during the operation of the motor. The longitudinal reinforcing ribs and the transverse reinforcing ribs intersect and are integrally formed with the housing body, which can effectively improve the rigidity of the transmission housing and reduce the weight of the transmission housing.

[0007] Preferably, the first flange, the second flange, the third flange and the bolt mounting hole are integrally formed. The flange and the bolt mounting hole are integrally formed, which can effectively improve the structural strength of the bolt connection position.

[0008] Preferably, an intermediate plate is provided inside the housing body, and the intermediate plate and the inner wall of the housing body are configured to form an accommodating cavity, and more than two motor stator fixing bosses are provided inside the accommodating cavity. The accommodating cavity is used to install the motor stator and rotor and related parts, and a plurality of motor stator fixing bosses are provided inside the accommodating cavity. The motor stator is fixed to the motor stator fixing bosses by bolts, which play a fixed and limited role on the motor stator, and ensure that the motor stator is connected reliably.

[0009] Preferably, the motor junction box is fixed to the motor junction box mounting surface by bolts, and a sealing ring mounting groove is provided on the motor junction box mounting surface. A motor junction box mounting surface is provided on the top of the housing body, and the motor junction box is fixed to the motor junction box mounting surface by bolts. A sealing ring mounting groove for mounting a sealing ring is designed on the motor junction box mounting surface, which can effectively prevent external impurities such as dust and moisture from entering the interior of the housing.

[0010] Preferably, a vent hole is provided on the top of the housing body, which is used to connect the inside and outside of the housing body, so that the air pressure inside and outside the housing body of the hybrid transmission is balanced.

[0011] Preferably, the present invention further comprises a first motor bearing hole arranged on the intermediate plate, a first annular rib is arranged on the outer circumference of the first motor bearing hole, and a first radial rib is arranged on the intermediate plate extending radially outward from the outer wall of the first motor bearing hole; and further comprises a second motor bearing hole arranged on the intermediate plate, a second annular rib is arranged on the outer circumference of the second motor bearing hole, and a second radial rib is arranged on the intermediate plate extending radially outward from the outer wall of the second motor bearing hole. The first motor bearing hole and the second motor bearing hole of the present invention both penetrate the intermediate plate, and the first motor bearing hole and the second motor bearing hole are used to support the first motor and the second motor respectively. In order to strengthen the strength of the first motor bearing hole, a plurality of first radial ribs are arranged on the inner wall surface of the intermediate plate accommodating cavity. At the same time, a first annular rib is designed on the outer circumference of the first motor bearing hole, which can strengthen the strength of the bolt hole boss around the first motor bearing hole and the first motor bearing hole. In order to enhance the strength of the second motor bearing and avoid interference with the motor stator, a plurality of second radial ribs are arranged on the outer wall surface of the intermediate plate accommodating cavity. At the same time, a second annular rib is designed on the outer peripheral surface of the second motor bearing hole to strengthen the strength of the bolt hole boss around the second motor bearing hole and the second motor bearing hole.

[0012] Preferably, it also includes a working mode switching mechanism mounting seat arranged on the middle plate, and a third radial rib is arranged on the middle plate extending radially outward from the outer wall of the working mode switching mechanism mounting seat; a working mode switching mechanism mounting seat is also arranged on the outer wall surface of the middle plate accommodating cavity, and the working mode switching mechanism is fixed on the working mode switching mechanism mounting seat by bolts, so as to realize the working mode switching between hybrid and engine direct drive. At the same time, in order to strengthen the strength of the working mode switching mechanism mounting seat and the bolt hole boss around the mechanism mounting seat, a third radial rib is arranged. The third radial rib connects the bolt hole boss and the working mode switching mechanism mounting seat.

[0013] Preferably, an oil pump connection surface is provided on the right side of the shell body, an oil pump suction port and an oil pump outlet are provided on the oil pump connection surface, and the front end face of the oil pump is connected to the oil pump connection surface; an oil suction filter interface is provided inside the shell body at the lower end face, and the oil suction filter interface is connected to the oil pump suction port. An oil cooler interface and an oil inlet are provided on the right side of the shell body near the rear end face, and the oil cooler interface is connected to the oil pump outlet, and the oil cooler is installed on the oil cooler interface and the oil inlet. In order to provide forced lubrication, the present invention provides an oil pump connection surface on the right side of the shell body, an oil pump suction port and an oil pump outlet are provided on the oil pump connection surface, and the oil pump suction port and the oil pump outlet are provided on the cavity inside the oil pump connection surface, and the front end face of the oil pump is connected to the oil pump connection surface. An oil suction filter interface is provided inside the shell body near the lower end face, and the oil suction filter interface is connected to the oil pump suction port. The lubricating oil is filtered by the oil suction filter before entering the oil pump to prevent the oil pump from sucking in polluted impurities. An oil cooler interface and an oil inlet are provided on the right side of the housing near the rear end surface, wherein the oil cooler interface is connected to the oil pump outlet, and the oil cooler is installed on the oil cooler interface and the oil inlet.

[0014] Preferably, a first oil circuit, a second oil circuit and a third oil circuit are provided on the rear side of the shell body. The first oil circuit is connected to the oil hole opened on the rear end face, the oil hole is connected to the oil inlet, the second oil circuit is connected to the first oil circuit, and the third oil circuit is connected to the second oil circuit. In the present invention, the oil flow path of the entire lubrication process is: the lubricating oil output by the oil pump enters the oil cooler through the oil cooler interface after passing through the oil pump outlet, and then is input into the housing through the oil inlet after being cooled by the oil cooler. One of the paths passes through the oil passage on the rear side of the housing body, enters the oil passage of the rear housing from the oil hole opened on the rear end face of the housing, and performs forced lubrication on the gears and bearings in the rear housing. The other path passes through the first oil circuit on the rear side of the housing, and then enters the housing through the second oil circuit and the third oil circuit. An oil pipe hole connected to the third oil circuit is provided inside the housing, and the oil injection pipe is connected to the oil pipe hole. At the same time, a plurality of oil pipe fixing bosses are provided inside the housing, and the oil injection pipe is fixed to the oil pipe fixing boss by bolts to ensure that the oil injection pipe is reliably connected. A plurality of small holes are provided on the oil injection pipe. During operation, the lubricating oil inside the oil injection pipe is sprayed out from the small holes to cool the motor.

[0015] Preferably, the present invention also includes a motor oil receiving shell arranged at the lower part of the accommodating cavity of the shell body, the motor oil receiving shell and the shell body are integrally formed, and oil receiving shell reinforcing ribs are arranged between the bottom inner wall of the shell body and the motor oil receiving shell. The present invention arranges a motor oil receiving shell around the two motor stators inside the shell body. After the lubricating oil is sprayed out from the small hole of the oil injection pipe, it enters the cavity formed between the motor oil receiving shell and the motor stator to form an oil pool, thereby preventing the lubricating oil from being lost quickly and improving the cooling effect on the motor. The motor oil receiving shell and the shell body are integrally formed. In order to strengthen the strength of the motor oil receiving shell, a plurality of oil receiving shell reinforcing ribs are arranged to connect the motor oil receiving shell and the inner wall surface of the shell body.

[0016] Preferably, the number of the motor oil receiving shells is 2, and an oil baffle plate is provided at the connection of the two motor oil receiving shells. Two oil baffle plates are provided at the upper connection of the motor oil receiving shells, which can guide the scattered and splashed lubricating oil to the oil receiving shells of the two motors to ensure the cooling effect of the motors.

[0017] Preferably, the inner bottom surface of the shell body of the present invention is provided with a first oil return hole, the first oil return hole is connected to the oil pan, and also includes a second oil return hole penetrating the middle plate, the lower part of the second oil return hole is wedge-shaped. The present invention is provided with two first oil return holes, and the lubricating oil inside the shell returns to the oil pan through the first oil return hole. In order to prevent the shell from tilting during the uphill process of the vehicle, and the lubricating oil is accumulated in the cavity formed between the motor oil receiving shell and the motor stator, two second oil return holes are provided inside the shell body. The second oil return hole penetrates the middle plate between the inside of the shell and the rear shell, so that the excess lubricating oil accumulated in the cavity flows into the oil pan through the second oil return hole. The lower part of the second oil return hole is designed in a wedge shape, and the oil return speed is accelerated when the oil is higher than the wedge-shaped part, so the oil return speed can be controlled.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The structural optimization and reinforcement rib design of the present invention suppress the deformation of the shell body and ensure the overall strength by ensuring uniform wall thickness, avoiding deep cavities and narrow areas, and providing longitudinal reinforcement ribs and transverse reinforcement ribs.

[0020] The structure has high strength and adopts a radial rib design. The first radial rib, the second radial rib and the third radial rib are respectively arranged to strengthen the strength of the first motor bearing hole, the second motor bearing hole and the working mode switching mechanism mounting seat.

[0021] The integrated oil circuit design has a first oil circuit, a second oil circuit and a third oil circuit arranged inside the shell body. The third oil circuit is connected to the oil injection pipe through the oil pipe hole to realize cooling of the two motors.

[0022] Motor casing oil collection and oil return design: A motor oil collection casing is set inside the casing, and the lubricating oil enters the cavity formed between the motor oil collection casing and the motor stator to form an oil pool, which prevents the lubricating oil from losing quickly and improves the cooling effect of the motor. The motor oil collection casing and the casing body are integrally formed; a second oil return hole is provided to return the oil collected in the motor oil collection casing to the oil pan. The lower part of the second oil return hole is wedge-shaped, and the oil return speed is accelerated when the oil is higher than the wedge-shaped part, which can control the oil return speed; an oil baffle is provided to guide the scattered lubricating oil to the oil collection casings of the two motors to ensure the cooling effect of the motors. The oil baffle is integrally formed with the casing and the motor oil collection casing; a first oil return hole is provided to ensure that the lubricating oil inside the casing can smoothly return to the oil pan;

[0023] The multi-interface structure design is compact and highly integrated. An oil pump connection surface and an oil cooler interface are provided on the right side of the shell body for connecting the oil pump and the oil cooler. Inside the shell body, an oil suction filter interface is provided near the lower end surface for connecting the oil suction filter. A motor terminal box mounting surface is provided on the top of the shell body for installing the motor terminal box. A working mode switching mechanism mounting seat is also provided on the outer wall of the middle plate of the shell body for installing the working mode switching mechanism.

[0024] A vent hole is arranged on the top of the hybrid transmission housing body to ensure the balance of air pressure inside and outside the hybrid transmission housing body. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the front structure of a dual-motor hybrid transmission housing according to the present invention

[0026] Figure 2 A schematic diagram of the rear structure of a dual-motor hybrid transmission housing according to the present invention

[0027] Figure 3 A schematic diagram of the right side structure of a dual-motor hybrid transmission housing according to the present invention

[0028] Figure 4 A schematic diagram of the left side structure of a dual-motor hybrid transmission housing according to the present invention

[0029] Figure 5 A schematic diagram of the top structure of a dual-motor hybrid transmission housing according to the present invention

[0030] Figure 6 A schematic diagram of the bottom structure of a dual-motor hybrid transmission housing according to the present invention

[0031] Figure 7 Schematic diagram of the internal oil channel structure of a dual-motor hybrid transmission housing according to the present invention

[0032] In the figure: 1-housing body, 2-motor oil receiving shell, 3-first radial rib, 4-first motor bearing hole, 5-oil pipe fixing boss, 6-oil pipe hole, 7-motor stator fixing boss, 8-front end surface, 9-first oil return hole, 10-oil hole, 11-second radial rib, 12-second motor bearing hole, 13-rear end surface, 14-third radial rib, 15-working mode switching mechanism mounting seat, 16-oil pump connection surface, 17-oil pump suction port, 18-oil pump oil outlet, 19-oil cooler interface , 20-oil inlet, 21-motor terminal box mounting surface, 22-seal ring mounting groove, 23-longitudinal reinforcement ribs, 24-transverse reinforcement ribs, 25-oil suction filter interface, 26-lower end surface, 27-second oil return hole, 28-first flange, 29-first annular ribs, 30-second annular ribs, 31-first oil circuit, 32-second oil circuit, 33-third oil circuit, 34-oil shell reinforcement ribs, 35-oil baffle plate, 36-vent, 37-second flange, 38-third flange, 39-middle plate. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0034] In the description of the present invention, it is necessary to understand that the terms "left", "right", "up", "down", "front", "back", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or structure referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0035] In this embodiment, the longitudinal direction only refers to the direction of the motor shaft after the motor is installed.

[0036] like Figures 1-2 As shown, this embodiment provides a dual-motor hybrid transmission housing for accommodating and installing two motors, including a housing body 1; a front end face 8 arranged at the front end of the housing body 1; a rear end face 13 arranged at the rear end of the housing body 1; a lower end face 26 arranged at the lower end of the housing body 1; the outer peripheral surface of the front end face 8 is provided with a first flange 28, the outer peripheral surface of the rear end face 13 is provided with a second flange 37, and the outer peripheral surface of the lower end face 26 is provided with a third flange 38, more than two longitudinal reinforcing ribs 23 are provided on the outer wall surface of the housing body 1, and more than two transverse reinforcing ribs 24 are provided on the outer wall surface of the housing body 1.

[0037] like Figure 4As shown, in this embodiment, the front end face 8 of the shell body 1 is the front shell connecting surface, which is used to be connected to the front shell by bolts; the rear end face 13 is the rear shell connecting surface, which is used to be connected to the rear shell by bolts; the lower end face 26 is the oil pan connecting surface, which is used to be connected to the oil pan by bolts; flanges are designed on the outer peripheral surfaces of the front end face 8, the rear end face 13 and the lower end face 26, and the first flange 28, the second flange 37 and the third flange 38 are all provided with bolt holes for fastening connection, which can effectively improve the structural strength of the bolt connection position.

[0038] like Figure 5 As shown, this embodiment also includes a motor terminal box mounting surface 21 arranged on the top of the shell body 1, one end of the longitudinal reinforcing rib 23 on the top of the shell body 1 is connected to the side wall of the motor terminal box mounting surface 21 and the other end is connected to the second flange 37 on the top of the rear end face 13, one end of the longitudinal reinforcing rib 23 on the outer wall of both sides of the shell body 1 is connected to the first flange 28 and the other end is connected to the second flange 37, and one end of the longitudinal reinforcing rib 23 on the bottom of the shell body 1 is connected to the first flange 28 and the other end is connected to the second flange 37. The longitudinal reinforcing rib 23 has a certain height and extends along the axial direction of the shell body 1 on the outer peripheral surface of the shell body 1.

[0039] like Figures 5-6 As shown, in this embodiment, the transverse reinforcing ribs 24 are vertically arranged on the outer wall of the shell body 1, and the transverse reinforcing ribs 24 are circumferentially arranged on the outer wall of the shell body 1. The shell body 1 is provided with transverse reinforcing ribs 24 on the top, both sides and bottom. The multiple transverse reinforcing ribs 24 are arranged at unequal intervals, and the transverse reinforcing ribs 24 intersect with the longitudinal reinforcing ribs 23 on the outer walls of both sides of the shell body 1.

[0040] In this embodiment, the first flange 28, the second flange 37, and the third flange 38 are all integrally formed with the bolt mounting holes. The flanges and the bolt mounting holes are integrally formed and manufactured, which can effectively improve the structural strength of the bolt connection position.

[0041] like Figure 1 and Figure 2 As shown, in this embodiment, an intermediate plate 39 is arranged inside the housing body 1, and the intermediate plate 39 and the inner wall of the housing body 1 are configured to form an accommodating cavity, and more than two motor stator fixing bosses 7 are arranged inside the accommodating cavity. The accommodating cavity is used to install the motor stator and rotor and related parts, and a plurality of motor stator fixing bosses 7 are arranged inside the accommodating cavity. The motor stator is fixed to the motor stator fixing boss 7 by bolts, which plays a role in fixing and limiting the motor stator.

[0042] In this embodiment, the motor terminal box is fixed to the motor terminal box mounting surface 21 by bolts, and a sealing ring mounting groove 22 is provided on the motor terminal box mounting surface 21. A motor terminal box mounting surface 21 is provided on the top of the housing body 1, and the motor terminal box is fixed to the motor terminal box mounting surface 21 by bolts. A sealing ring mounting groove 22 for mounting a sealing ring is designed on the motor terminal box mounting surface 21.

[0043] like Figure 6 In the embodiment shown, a vent hole 36 is provided on the top of the housing body 1. The vent hole 36 is provided on the top of the housing body 1 to connect the inside and outside of the housing body 1 so that the air pressure inside and outside the housing body 1 of the hybrid transmission is balanced.

[0044] like Figure 1 and Figure 2 As shown, in this embodiment, the housing cavity of the housing body 1 in this embodiment is divided into two parts, which respectively accommodate the first motor and the second motor. This embodiment also includes a first motor bearing hole 4 arranged on the intermediate plate 39, the outer peripheral surface of the first motor bearing hole 4 is provided with a first annular rib 29, and the intermediate plate 39 is provided with a first radial rib 3 extending radially outward from the outer wall of the first motor bearing hole 4; and also includes a second motor bearing hole 12 arranged on the intermediate plate 39, the outer peripheral surface of the second motor bearing hole 12 is provided with a second annular rib 30, and the intermediate plate 39 is provided with a second radial rib 11 extending radially outward from the outer wall of the second motor bearing hole 12.

[0045] like Figure 1 and Figure 2 As shown, this embodiment also includes a working mode switching mechanism mounting seat 15 arranged on the middle plate 39, and a third radial rib 14 is arranged on the middle plate 39 extending radially outward from the outer wall of the working mode switching mechanism mounting seat 15; the outer wall surface of the accommodating cavity of the middle plate 39 is also provided with a working mode switching mechanism mounting seat 15, and the working mode switching mechanism is fixed on the working mode switching mechanism mounting seat 15 by bolts, so that the working mode switching between hybrid and engine direct drive can be realized. At the same time, in order to strengthen the strength of the working mode switching mechanism mounting seat 15 and the bolt hole boss around the mechanism mounting seat, a third radial rib 14 is arranged. The third radial rib 14 connects the bolt hole boss and the working mode switching mechanism mounting seat 15.

[0046] like Figure 3 As shown, in this embodiment, an oil pump connection surface 16 is provided on the right side of the housing body 1, an oil pump suction port 17 and an oil pump outlet 18 are provided on the oil pump connection surface 16, and the front end surface of the oil pump is connected to the oil pump connection surface 16; Figure 7 As shown, an oil suction filter interface 25 is provided inside the housing body 1 at the lower end surface 26, and the oil suction filter interface 25 is connected to the oil pump suction port 17. Figure 3As shown, an oil cooler interface 19 and an oil inlet 20 are provided on the right side of the shell body 1 near the rear end surface 13. The oil cooler interface 19 is connected to the oil pump outlet 18, and the oil cooler is installed on the oil cooler interface 19 and the oil inlet 20. This embodiment adopts forced lubrication, and an oil pump connection surface 16 is provided on the right side of the shell body 1. The oil pump connection surface 16 is provided with an oil pump suction port 17 and an oil pump outlet 18. The front end surface of the oil pump is connected to the oil pump connection surface 16. Figure 6 As shown, inside the shell body 1, an oil suction filter interface 25 is provided near the lower end surface 26, and the oil suction filter interface 25 is connected to the oil pump suction port 17. The lubricating oil is filtered by the oil suction filter before entering the oil pump to prevent the oil pump from sucking in polluted impurities. An oil cooler interface 19 and an oil inlet 20 are provided on the right side of the shell near the rear end surface 13, wherein the oil cooler interface 19 is connected to the oil pump oil outlet 18, and the oil cooler is installed on the oil cooler interface 19 and the oil inlet 20.

[0047] like Figure 7 As shown, in this embodiment, the rear side of the shell body 1 is provided with a first oil circuit 31, a second oil circuit 32 and a third oil circuit 33. The first oil circuit 31 is connected to the oil hole 10 opened on the rear end face 13, the oil hole 10 is connected to the oil inlet 20, the second oil circuit 32 is connected to the first oil circuit 31, and the third oil circuit 33 is connected to the second oil circuit 32. In this embodiment, the oil flow path of the entire lubrication process is: the lubricating oil output by the oil pump enters the oil cooler through the oil cooler interface 19 after passing through the oil pump outlet 18, and then enters the shell through the oil inlet 20 after being cooled by the oil cooler. One of the paths passes through the oil channel on the rear side of the shell body 1, enters the oil channel of the rear shell from the oil hole 10 opened on the rear end face 13 of the shell, and performs forced lubrication on the gears and bearings in the rear shell. The other path passes through the first oil circuit 31 on the rear side of the shell, and then enters the shell through the second oil circuit 32 and the third oil circuit 33. An oil pipe hole 6 connected to the third oil circuit 33 is provided inside the shell, and the oil injection pipe is connected to the oil pipe hole 6. At the same time, a plurality of oil pipe fixing bosses 5 are provided inside the housing, and the oil injection pipe is fixed to the oil pipe fixing bosses 5 by bolts to ensure reliable connection of the oil injection pipe. A plurality of small holes are opened on the oil injection pipe, and during operation, the lubricating oil inside the oil injection pipe is sprayed out from the small holes to cool the motor.

[0048] like Figure 1 As shown, this embodiment also includes a motor oil receiving shell 2 arranged at the lower part of the accommodating cavity of the shell body 1, the motor oil receiving shell 2 and the shell body 1 are integrally formed, and an oil receiving shell reinforcement rib 34 is arranged between the bottom inner wall of the shell body 1 and the motor oil receiving shell 2.

[0049] like Figure 1As shown, in this embodiment, the number of the motor oil receiving shells 2 is two, and the number of the motor oil receiving shells 2 is two, corresponding to the lower parts of the two motor installation positions, and an oil baffle plate 35 is provided at the connection between the two motor oil receiving shells 2.

[0050] like Figure 1 As shown, in this embodiment, a first oil return hole 9 is provided on the inner bottom surface of the housing body 1, and the first oil return hole 9 is connected to the oil pan, and also includes a second oil return hole 27 penetrating the intermediate plate 39, and the lower part of the second oil return hole 27 is wedge-shaped. In this embodiment, two first oil return holes 9 are provided, and the lubricating oil inside the housing returns to the oil pan through the first oil return holes 9. In order to prevent the housing from tilting during the vehicle going uphill, and the lubricating oil is accumulated in the cavity formed between the motor oil receiving shell 2 and the motor stator, two second oil return holes 27 are provided inside the housing body 1. The second oil return hole 27 penetrates the intermediate plate 39 between the inside of the housing and the rear housing, so that the excess lubricating oil accumulated in the cavity flows into the oil pan through the second oil return hole 27. The lower part of the second oil return hole 27 is wedge-shaped, and the oil return speed is accelerated when the oil is higher than the wedge-shaped part, which can control the oil return speed.

Claims

1. A dual-motor hybrid transmission housing, characterized in that The invention comprises a shell body (1); a front end face (8) arranged at the front end of the shell body (1); a rear end face (13) arranged at the rear end of the shell body (1); and a lower end face (26) arranged at the lower end of the shell body (1); the outer peripheral surface of the front end face (8) is provided with a first flange (28), the outer peripheral surface of the rear end face (13) is provided with a second flange (37), and the outer peripheral surface of the lower end face (26) is provided with a third flange (38); the outer side wall surface of the shell body (1) is provided with more than two longitudinal reinforcing ribs (23), and the outer side wall surface of the shell body (1) is provided with more than two transverse reinforcing ribs (24).

2. A dual-motor hybrid transmission housing according to claim 1, characterized in that: The invention also comprises a motor terminal box mounting surface (21) arranged on the top of the shell body (1); one end of a longitudinal reinforcing rib (23) on the top of the shell body (1) is connected to the side wall of the motor terminal box mounting surface (21) and the other end is connected to the second flange (37) on the top of the rear end surface (13); one end of the longitudinal reinforcing rib (23) on the outer wall on both sides of the shell body (1) is connected to the first flange (28) and the other end is connected to the second flange (37); one end of the longitudinal reinforcing rib (23) on the bottom of the shell body (1) is connected to the first flange (28) and the other end is connected to the second flange (37).

3. The dual-motor hybrid transmission housing according to claim 1, characterized in that: The transverse reinforcing ribs (24) are vertically arranged on the outer wall of the shell body (1), and a plurality of the transverse reinforcing ribs (24) are arranged at unequal intervals. The transverse reinforcing ribs (24) intersect with the longitudinal reinforcing ribs (23) on the outer walls of both sides of the shell body (1).

4. A dual-motor hybrid transmission housing according to claim 1, characterized in that: An intermediate plate (39) is arranged inside the shell body (1), and the intermediate plate (39) and the inner wall of the shell body (1) form an accommodating cavity, and more than two motor stator fixing bosses (7) are arranged inside the accommodating cavity.

5. A dual-motor hybrid transmission housing according to claim 4, characterized in that: The invention also includes a first motor bearing hole (4) arranged on the intermediate plate (39), a first annular rib (29) being arranged on the outer peripheral surface of the first motor bearing hole (4), and a first radial rib (3) extending radially outward from the outer wall of the first motor bearing hole (4) on the intermediate plate (39); and a second motor bearing hole (12) arranged on the intermediate plate (39), a second annular rib (30) being arranged on the outer peripheral surface of the second motor bearing hole (12), and a second radial rib (11) extending radially outward from the outer wall of the second motor bearing hole (12) on the intermediate plate (39).

6. A dual-motor hybrid transmission housing according to claim 4, characterized in that: It also includes a working mode switching mechanism mounting seat (15) arranged on the intermediate plate (39), and a third radial rib (14) is arranged on the intermediate plate (39) extending radially outward from the outer wall of the working mode switching mechanism mounting seat (15).

7. The dual-motor hybrid transmission housing according to claim 1, characterized in that: An oil pump connection surface (16) is provided on the right side of the housing body (1), an oil pump oil suction port (17) and an oil pump oil outlet (18) are provided on the oil pump connection surface (16), and the front end surface of the oil pump is connected to the oil pump connection surface (16); an oil suction filter interface (25) is provided inside the housing body (1) at the lower end surface (26), and the oil suction filter interface (25) is communicated with the oil pump oil suction port (17); an oil cooler interface (19) and an oil inlet (20) are provided on the right side of the housing body (1) near the rear end surface (13), the oil cooler interface (19) and the oil pump oil outlet (18) are communicated, and the oil cooler is installed on the oil cooler interface (19) and the oil inlet (20).

8. The dual-motor hybrid transmission housing according to claim 7, characterized in that: A first oil circuit (31), a second oil circuit (32) and a third oil circuit (33) are arranged on the rear side of the housing body (1); the first oil circuit (31) is connected to an oil hole (10) provided on the rear end face (13); the oil hole (10) is connected to an oil inlet (20); the second oil circuit (32) is connected to the first oil circuit (31); and the third oil circuit (33) is connected to the second oil circuit (32).

9. The dual-motor hybrid transmission housing according to claim 1, characterized in that: It also includes a motor oil receiving shell (2) arranged at the lower part of the accommodating cavity of the shell body (1); the motor oil receiving shell (2) and the shell body (1) are integrally formed; and an oil receiving shell reinforcing rib (34) is arranged between the bottom inner wall of the shell body (1) and the motor oil receiving shell (2).

10. The dual-motor hybrid transmission housing according to claim 4, characterized in that: The inner bottom surface of the housing body (1) is provided with a first oil return hole (9), the first oil return hole (9) being connected to the oil pan, and also comprising a second oil return hole (27) penetrating the intermediate plate (39), the lower part of the second oil return hole (27) being wedge-shaped.

Images