Shell assembly of electric drive system, electric drive system and vehicle

Abstract

The utility model discloses a shell assembly of an electric drive system, the electric drive system and a vehicle, the shell assembly of the electric drive system comprises a first shell, a second shell and a third shell, the first shell is internally provided with a motor cavity, and at least one axial end of the first shell is opened to form an opening; and the second shells are arranged at the openings and used for blocking the openings, the number of the second shells is the same as that of the openings, the second shells and the openings are in one-to-one correspondence, shaft tooth cavities are formed in the second shells, and the shaft tooth cavities and the motor cavities are mutually independent and spaced. According to the shell assembly of the electric drive system, oil path intercommunication between the shaft tooth cavity and the motor cavity is avoided, so that motor failure caused by the fact that impurities such as scrap iron in the shaft tooth cavity are adsorbed on the motor is avoided, the service life of the motor is prolonged, and the working reliability of the electric drive system is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric drive systems, and in particular to a housing component of an electric drive system, an electric drive system and a vehicle. Background Art

[0002] The four-wheel independent drive electric drive systems currently designed by major domestic automobile companies have interconnected shaft gear cavities and motor cavities due to their configuration and structural layout. When the gears run at high speeds, they will stir up iron filings in the cooling oil and adsorb them on the motor, easily causing the motor to fail. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a housing assembly of an electric drive system, which prevents impurities such as iron filings in the shaft gear cavity from being adsorbed on the motor and causing the motor to fail, thereby increasing the service life of the motor and improving the working reliability of the electric drive system.

[0004] The utility model also provides an electric drive system, comprising the housing assembly of the electric drive system mentioned above.

[0005] The utility model also provides a vehicle, comprising the above-mentioned electric drive system.

[0006] According to the embodiment of the utility model, the housing assembly of the electric drive system includes: a first housing, wherein the first housing has a motor cavity therein, and at least one axial end of the first housing is open to form an open opening; a second housing, wherein the second housing is arranged at the open opening to seal the open opening, the number of the second housings is the same as the number of the open openings and corresponds one to one, and the second housing has a shaft gear cavity therein, and the shaft gear cavity and the motor cavity are independent of and spaced apart from each other.

[0007] According to the housing assembly of the electric drive system of the embodiment of the utility model, a motor cavity is arranged in the first housing, at least one axial end of the first housing is opened to form an open opening, a second housing is arranged at the open opening, and a shaft gear cavity is arranged in the second housing. The shaft gear cavity and the motor cavity are independent of and spaced apart from each other, thereby avoiding oil paths in the shaft gear cavity and the motor cavity from being connected, thereby avoiding impurities such as iron filings in the shaft gear cavity from being adsorbed on the motor and causing motor failure, thereby improving the service life of the motor and improving the working reliability of the electric drive system.

[0008] In some embodiments of the present invention, the second shell includes: a shell body, which is connected to the first shell and is used to seal the open opening; and an end cover, which is connected to an end of the shell body away from the first shell, and the shaft gear cavity is formed between the end cover and the shell body.

[0009] In some embodiments of the utility model, an assembly cavity is provided at the bottom of the shell body, the assembly cavity is open on one side facing the end cover, the end of the end cover facing the shell body has a limiting protrusion, at least a portion of the limiting protrusion extends into the assembly cavity, and the shell assembly of the electric drive system also includes: a magnet, which is provided in the assembly cavity and abuts against the limiting protrusion.

[0010] In some embodiments of the present invention, the outer contour of the end face of the shell body facing the first shell and the outer contour of the end face of the first shell facing the shell body are consistent in shape and fit together; and / or, the outer contour of the end face of the shell body facing the end cover and the outer contour of the end face of the end cover facing the shell body are consistent in shape and fit together.

[0011] In some embodiments of the present invention, the shell body, the end cover and the first shell are connected by a locating pin, the locating pin and the first shell are interference fit, and the locating pin and the shell body and the end cover are clearance fit; and / or, the shell body, the end cover and the first shell are connected by fasteners; and / or, a sealant is provided between the shell body and the first shell; and / or, a sealant is provided between the shell body and the end cover.

[0012] In some embodiments of the present invention, the first shell has an oil chamber at the bottom, the oil chamber is located below and separated from the motor chamber, and the bottom wall of the motor chamber has at least one first oil return hole, the first oil return hole is used to connect the oil chamber with the motor chamber; and / or, a second oil return hole and a third oil return hole are provided on the wall surface of the second shell facing the first shell, the second oil return hole connects the oil chamber and the shaft gear chamber, the third oil return hole is located above the second oil return hole, and the third oil return hole is connected to the oil chamber through a connecting pipe.

[0013] In some embodiments of the present invention, the housing assembly of the electric drive system also includes: a nozzle assembly, which is connected to the oil chamber, the nozzle assembly is located in the motor chamber and the shaft gear chamber, the nozzle assembly extends along the axial direction of the first housing, and the nozzle assembly has multiple oil spray ports for spraying oil into the motor chamber and the shaft gear chamber.

[0014] In some embodiments of the utility model, a partition is provided in the first shell, and the partition divides the motor cavity into two sub-motor cavities spaced apart along the axial direction of the first shell, and the two stators of the two motors are respectively located in the two sub-motor cavities, and the partition has an installation space and a shell oil channel, and the two rotors of the two motors are both arranged in the installation space, and the shell oil channel is connected with the installation space, the oil cavity and the nozzle assembly.

[0015] In some embodiments of the utility model, the nozzle assembly includes: a first nozzle, the first nozzle is penetrated on the second shell and extends along the axial direction of the first shell, the first nozzle is provided with a plurality of the oil spray ports spaced apart along the length direction of the first nozzle, and the first nozzle is used to spray oil into the motor cavity; a second nozzle, the second nozzle is penetrated on the second shell and extends along the axial direction of the first shell, the second nozzle is provided with a plurality of the oil spray ports spaced apart along the length direction of the second nozzle, and the second nozzle is used to spray oil into the motor cavity and the shaft gear cavity at the same time.

[0016] The electric drive system according to the embodiment of the utility model includes the housing assembly of the electric drive system mentioned above.

[0017] According to the electric drive system of the embodiment of the utility model, by setting the shell assembly of the above-mentioned electric drive system, a motor cavity is set in the first shell, at least one axial end of the first shell is opened to form an open opening, a second shell is set at the open opening, and a shaft gear cavity is set in the second shell. The shaft gear cavity and the motor cavity are independent of and spaced apart from each other, thereby avoiding the oil circuits in the shaft gear cavity and the motor cavity from being connected, thereby avoiding impurities such as iron filings in the shaft gear cavity from being adsorbed on the motor and causing the motor to fail, thereby improving the service life of the motor and improving the working reliability of the electric drive system.

[0018] A vehicle according to an embodiment of the present utility model includes the above-mentioned electric drive system.

[0019] According to the vehicle of the embodiment of the utility model, the above-mentioned electric drive system is arranged, the housing assembly of the above-mentioned electric drive system is arranged, a motor cavity is arranged in the first housing, at least one axial end of the first housing is opened to form an open opening, a second housing is arranged at the open opening, and a shaft gear cavity is arranged in the second housing. The shaft gear cavity and the motor cavity are independent of and spaced apart from each other, thereby avoiding the oil paths in the shaft gear cavity and the motor cavity from being connected, thereby avoiding impurities such as iron filings in the shaft gear cavity from being adsorbed on the motor and causing the motor to fail, thereby improving the service life of the motor and improving the working reliability of the electric drive system.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 is an exploded view of a housing assembly of an electric drive system according to an embodiment of the utility model;

[0023] Figure 2 is a partial enlarged view of an exploded view of a housing assembly of an electric drive system according to an embodiment of the utility model;

[0024] Figure 3 is a side view of a shell body of a second shell of a shell assembly of an electric drive system according to an embodiment of the utility model;

[0025] Figure 4 is a side view of an end cover of a second housing of a housing assembly of an electric drive system according to an embodiment of the utility model;

[0026] Figure 5 It is a stereoscopic view of a housing assembly of an electric drive system according to an embodiment of the utility model, wherein a partial structure of the second housing is not shown.

[0027] Reference numerals:

[0028] 10. Housing components of the electric drive system;

[0029] 1. first housing; 11. motor cavity; 12. open mouth; 13. first oil return hole; 14. positioning pin; 15. partition;

[0030] 2. Second housing; 21. Housing body; 211. Assembly cavity; 22. End cover; 221. Limiting protrusion; 23. Second oil return hole; 24. Third oil return hole; 25. Shaft gear cavity;

[0031] 3. Nozzle assembly; 31. First nozzle; 32. Second nozzle; 33. Oil injection port;

[0032] 4. Shell oil channel. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0034] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model 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 cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Reference below Figure 1-Figure 5 A housing assembly 10 of an electric drive system according to an embodiment of the present invention is described.

[0037] like Figure 1 and Figure 2 As shown, the housing assembly 10 of the electric drive system according to an embodiment of the present utility model includes a first housing 1 and a second housing 2 .

[0038] Specifically, refer to Figure 1 and Figure 2 The first housing 1 has a motor cavity 11, and at least one axial end of the first housing 1 is open to form an open opening 12. The motor is located in the motor cavity 11. The setting of the open opening 12 facilitates the installation and removal of the motor. The second housing 2 is provided at the open opening 12 to block the open opening 12. The number of the second housings 2 is the same as the number of the open openings 12 and corresponds one to one.

[0039] For example, in the present invention, both axial ends of the first shell 1 are open to form two open openings 12, and the second shell 2 is two, but the present invention is not limited to this. It is also possible that one axial end of the first shell 1 is open to form one open opening 12, and the second shell 2 is one.

[0040] Furthermore, if Figure 1 and Figure 2 As shown, the second housing 2 has a shaft tooth cavity 25, which is independent and separated from the motor cavity 11. It can be understood that the gear is located in the shaft tooth cavity 25. When the electric drive system is working, in order to prevent the motor and gear parts from overheating and affecting the performance of the electric drive system, it is necessary to cool the motor and gear parts by using cooling oil in the motor cavity 11 and the shaft tooth cavity 25. During operation, the gear will have a certain wear, thereby generating impurities such as iron filings. If the motor cavity and the shaft tooth cavity are interconnected, impurities such as iron filings will flow to the motor cavity with the flow of oil, so that impurities such as iron filings are adsorbed on the motor, which can easily cause the motor to fail.

[0041] In the present invention, the shaft tooth cavity 25 and the motor cavity 11 are independent and spaced apart from each other, thereby preventing the oil circuits in the shaft tooth cavity 25 and the motor cavity 11 from being interconnected, thereby preventing impurities such as iron filings in the shaft tooth cavity 25 from being adsorbed on the motor and causing motor failure, thereby increasing the service life of the motor and improving the working reliability of the electric drive system.

[0042] It should be noted that the cooling oil in the motor cavity 11 and the shaft gear cavity 25 can not only lubricate the motor and gears, but also cool the motor and gears.

[0043] According to the housing assembly 10 of the electric drive system of the embodiment of the utility model, a motor cavity 11 is arranged in the first housing 1, at least one axial end of the first housing 1 is opened to form an open opening 12, a second housing 2 is arranged at the open opening 12, and a shaft gear cavity 25 is arranged in the second housing 2. The shaft gear cavity 25 and the motor cavity 11 are independent of and spaced apart from each other, thereby avoiding oil paths in the shaft gear cavity 25 and the motor cavity 11 from being interconnected, thereby avoiding impurities such as iron filings in the shaft gear cavity 25 from being adsorbed on the motor and causing the motor to fail, thereby improving the service life of the motor and improving the working reliability of the electric drive system.

[0044] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the second shell 2 includes a shell body 21 and an end cover 22. The shell body 21 is connected to the first shell 1 and is used to seal the open port 12. It can be understood that the setting of the shell body 21 can better make the shaft gear cavity 25 and the motor cavity 11 independent and separated from each other, thereby avoiding the oil circuits in the shaft gear cavity 25 and the motor cavity 11 from being interconnected, thereby avoiding impurities such as iron filings in the shaft gear cavity 25 from being adsorbed on the motor and causing the motor to fail, thereby improving the service life of the motor and improving the working reliability of the electric drive system.

[0045] Furthermore, if Figure 1 and Figure 2As shown, the end cover 22 is connected to the end of the shell body 21 away from the first shell body 1, and a shaft tooth cavity 25 is formed between the end cover 22 and the shell body 21. It can be understood that the end of the first shell body 1 facing the end cover 22 is open, so as to facilitate the disassembly and assembly of parts such as gears, and the end cover 22 is connected to the end of the shell body 21 away from the first shell body 1, so that the shaft tooth cavity 25 can be sealed, so that the parts such as gears in the shaft tooth cavity 25 can work normally, and the oil leakage in the shaft tooth cavity 25 can also be avoided.

[0046] In some embodiments of the present invention, Figure 3 and Figure 4 As shown, an assembly cavity 211 is provided at the bottom of the shell body 21, and the side of the assembly cavity 211 facing the end cover 22 is open. The end of the end cover 22 facing the shell body 21 has a limiting protrusion 221, and at least a part of the limiting protrusion 221 extends into the assembly cavity 211. The housing assembly 10 of the electric drive system also includes a magnet (not shown), which is provided in the assembly cavity 211 and stops against the limiting protrusion 221.

[0047] It can be understood that the setting of the magnet can adsorb impurities such as iron filings generated by the operation of the gears in the shaft tooth cavity 25 around the assembly cavity 211, thereby reducing the flow of impurities such as iron filings in the shaft tooth cavity 25 along with the oil, thereby reducing the entry of impurities such as iron filings into the bearings or gear meshing surfaces along with the oil, thereby increasing the service life of the bearings and gears, and extending the oil failure cycle, thereby reducing the oil consumption of the electric drive system.

[0048] At the same time, since impurities such as iron filings have a high density and are easily deposited at the bottom of the shell body 21, and the assembly cavity 211 is arranged at the bottom of the shell body 21, the magnet can be arranged at the bottom of the shell body 21, thereby allowing the magnet to better absorb impurities such as iron filings, thereby further extending the oil failure cycle, thereby reducing the oil consumption of the electric drive system. Among them, since impurities such as iron filings are absorbed at the bottom of the shell body 21, the collision between impurities such as iron filings and parts such as gears in the shaft tooth cavity 25 can also be reduced, thereby reducing noise.

[0049] In addition, by the stoppering between the limiting protrusion 221 and the magnet, the magnet can be better fixed in the assembly cavity 211, preventing the magnet from leaving the assembly cavity 211 and damaging structures such as gears, while reducing the collision between the magnet and the inner wall of the assembly cavity 211, thereby further reducing noise.

[0050] In some embodiments of the present invention, Figure 1 and Figure 2As shown, the outer contour of the end face of the shell body 21 facing the first shell 1 and the outer contour of the end face of the first shell 1 facing the shell body 21 are consistent and fit, thereby improving the sealing effect between the shell body 21 and the first shell 1 and reducing oil leakage. At the same time, since the outer contour of the end face of the shell body 21 facing the first shell 1 and the outer contour of the end face of the first shell 1 facing the shell body 21 are consistent, the structure is simple, thereby reducing the design difficulty and manufacturing difficulty of the end face of the shell body 21 facing the first shell 1 and the end face of the first shell 1 facing the shell body 21, and improving production efficiency.

[0051] Furthermore, the outer contour of the end face of the shell body 21 facing the end cover 22 and the outer contour of the end face of the end cover 22 facing the shell body 21 are consistent and fit. Thus, the sealing effect between the shell body 21 and the end cover 22 is improved, and oil leakage is reduced. At the same time, since the outer contour of the end face of the shell body 21 facing the end cover 22 and the outer contour of the end face of the end cover 22 facing the shell body 21 are consistent, the structure is simple, thereby reducing the design difficulty and manufacturing difficulty of the end face of the shell body 21 facing the end cover 22 and the end face of the end cover 22 facing the shell body 21, and improving production efficiency.

[0052] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the shell body 21, the end cover 22 and the first shell 1 are connected by the positioning pin 14. The positioning pin 14 can position the shell body 21, the end cover 22 and the first shell 1 to ensure that the shell body 21, the end cover 22 and the first shell 1 are coaxial, which is beneficial to the fit between the end face of the shell body 21 facing the first shell 1 and the end face of the first shell 1 facing the shell body 21, as well as the fit between the end face of the shell body 21 facing the end cover 22 and the end face of the end cover 22 facing the shell body 21, thereby improving the assembly efficiency.

[0053] Furthermore, if Figure 1 and Figure 2 As shown, there is an interference fit between the locating pin 14 and the first shell 1, and there is a clearance fit between the locating pin 14 and the shell body 21 and the end cover 22. As a result, the locating pin 14 and the first shell 1 are fixedly connected, and the locating pin 14 and the shell body 21 and the end cover 22 are adjustably connected, so that the shell body 21 and the end cover 22 are adjustable relative to the first shell 1, thereby facilitating the coaxial arrangement of the shell body 21 and the end cover 22 with the first shell 1, which is beneficial to the fit between the end face of the shell body 21 facing the first shell 1 and the end face of the first shell 1 facing the shell body 21, as well as the fit between the end face of the shell body 21 facing the end cover 22 and the end face of the end cover 22 facing the shell body 21, thereby improving the assembly efficiency.

[0054] Furthermore, if Figure 1 and Figure 2 As shown, the shell body 21, the end cover 22 and the first shell 1 are connected by fasteners, thereby improving the connection reliability between the shell body 21, the end cover 22 and the first shell 1, thereby improving the sealing between the shell body 21, the end cover 22 and the first shell 1 and reducing oil leakage.

[0055] Furthermore, if Figure 1 and Figure 2 As shown, sealant is provided between the shell body 21 and the first shell 1, and the end face of the shell body 21 facing the first shell 1 and the end face of the first shell 1 facing the shell body 21 are connected by the sealant, thereby improving the connection reliability between the shell body 21 and the first shell 1, and also improving the sealing between the shell body 21 and the first shell 1, thereby reducing oil leakage.

[0056] Furthermore, if Figure 1 and Figure 2 As shown, sealant is provided between the shell body 21 and the end cover 22, and the end surface of the shell body 21 facing the end cover 22 and the end surface of the end cover 22 facing the shell body 21 are connected by the sealant, thereby improving the connection reliability between the shell body 21 and the end cover 22, and also improving the sealing between the shell body 21 and the end cover 22, thereby reducing oil leakage.

[0057] Preferably, in the present invention, the shell body 21, the end cover 22 and the first shell 1 are first connected by the locating pin 14, and then the end face of the shell body 21 facing the first shell 1 and the end face of the first shell 1 facing the shell body 21 are connected by sealant, and at the same time, the end face of the shell body 21 facing the end cover 22 and the end face of the end cover 22 facing the shell body 21 are connected by sealant, and finally the shell body 21, the end cover 22 and the first shell 1 are connected by fasteners, thereby improving the connection reliability between the shell body 21, the end cover 22 and the first shell 1, and also improving the sealing between the shell body 21, the end cover 22 and the first shell 1, reducing oil leakage, and at the same time facilitating the fitting of the end face of the shell body 21 facing the first shell 1 and the end face of the first shell 1 facing the shell body 21, as well as the fitting of the end face of the shell body 21 facing the end cover 22 and the end face of the end cover 22 facing the shell body 21, thereby improving assembly efficiency.

[0058] In some embodiments of the present invention, Figure 5As shown, the bottom of the first shell 1 has an oil chamber (not shown), the oil chamber is located below the motor chamber 11 and separated from the motor chamber 11, and the bottom wall of the motor chamber 11 has at least one first oil return hole 13, the first oil return hole 13 is used to connect the oil chamber with the motor chamber 11, the first oil return hole 13 can make the oil in the motor chamber 11 flow back to the oil chamber, the oil in the oil chamber passes through the suction filter, the oil pump and the oil cooler in turn and then returns to the motor chamber 11, thereby realizing oil circulation, thereby reducing the oil consumption of the electric drive system.

[0059] Furthermore, if Figure 3 As shown, a second oil return hole 23 and a third oil return hole 24 are provided on the wall surface of the second shell 2 facing the first shell 1. The second oil return hole 23 directly connects the oil chamber and the shaft gear chamber 25. The third oil return hole 24 is located above the second oil return hole 23. The third oil return hole 24 is connected to the oil chamber through a connecting pipe (not shown).

[0060] It can be understood that both the second oil return hole 23 and the third oil return hole 24 can allow the oil in the shaft gear cavity 25 to flow back into the oil cavity. The oil in the oil cavity passes through the suction filter, the oil pump and the oil cooler in turn and then returns to the shaft gear cavity 25, thereby realizing oil circulation and reducing the oil consumption of the electric drive system.

[0061] When the amount of oil in the shaft gear chamber 25 is small (the height of the oil is higher than the second oil return hole 23, but lower than the third oil return hole 24), the oil in the shaft gear chamber 25 enters the oil chamber through the second oil return hole 23. When the amount of oil in the shaft gear chamber 25 is large (the height of the oil is higher than the third oil return hole 24), the oil in the shaft gear chamber 25 can flow into the oil chamber through the second oil return hole 23 and the third oil return hole 24 at the same time. Therefore, the third oil return hole 24 can be set to accelerate the flow of oil in the shaft gear chamber 25 to the oil chamber when there is too much oil in the shaft gear chamber 25, thereby avoiding the excessive oil in the shaft gear chamber 25 affecting the operation of the gears and improving the working reliability of the electric drive system.

[0062] In addition, the third oil return hole 24 is connected to the oil chamber through a connecting pipe, thereby preventing the oil in the shaft gear chamber 25 from flowing into the motor chamber 11, and further preventing impurities such as iron filings in the shaft gear chamber 25 from being adsorbed on the motor and causing motor failure, thereby increasing the service life of the motor and improving the working reliability of the electric drive system.

[0063] Furthermore, the second oil return hole 23 and the third oil return hole 24 are provided with filters, thereby filtering impurities such as iron filings in the shaft tooth cavity 25, reducing the amount of impurities such as iron filings entering the oil cavity, thereby reducing the oil in the oil cavity carrying impurities such as iron filings into the oil circulation of the electric drive system, thereby further reducing the amount of impurities such as iron filings in the shaft tooth cavity 25 adsorbed on the motor and causing the motor to fail, thereby increasing the service life of the motor and improving the working reliability of the electric drive system.

[0064] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the housing assembly 10 of the electric drive system also includes: a nozzle assembly 3, which is connected to the oil chamber, and is located in the motor chamber 11 and the shaft gear chamber 25. The nozzle assembly 3 extends along the axial direction of the first housing 1, and has multiple oil injection ports 33 for spraying oil into the motor chamber 11 and the shaft gear chamber 25.

[0065] It can be understood that the electric drive system includes: a suction filter, an oil pump and an oil cooler, one end of the suction filter is connected to the oil chamber, the other end of the suction filter is connected to the oil pump, and the other end of the oil pump is connected to the oil cooler, so that the nozzle assembly 3 is connected to the oil chamber. The oil pump is used to drive the flow of oil, the suction filter is used to filter impurities in the oil, and the oil cooler is used to cool the oil, so that the oil flowing into the nozzle assembly 3 is cold oil, so that the oil can cool the motor and gears.

[0066] Thus, the oil in the oil chamber can flow to the nozzle assembly 3 through the suction filter, the oil pump and the oil cooler in sequence, so that the oil can cool down and lubricate the motor and the gear.

[0067] In some embodiments of the present invention, Figure 1 and Figure 5 As shown, a partition 15 is provided in the first shell 1, and the partition 15 divides the motor cavity 11 into two sub-motor cavities separated along the axial direction of the first shell 1. There are two motors, and the two stators of the two motors are respectively located in the two sub-motor cavities. The partition 15 has an installation space and a shell oil channel 4. The two rotors of the two motors are both arranged in the installation space, and the shell oil channel 4 is connected with the installation space, the oil cavity and the nozzle assembly 3.

[0068] It can be understood that the housing oil passage 4 is connected to the oil cooler, so that the housing oil passage 4 is connected to the oil chamber, so that the oil in the oil chamber can not only flow to the oil injection port 33 on the nozzle assembly 3 through the housing oil passage 4, so that the oil can be sprayed to the motor chamber 11 and the shaft gear chamber 25, so that the oil can cool and lubricate the stator and gear. At the same time, the oil in the oil chamber can also flow to the installation space through the suction filter, the oil pump, the oil cooler and the housing oil passage 4 in sequence, so as to achieve cooling and lubrication of the rotor, so that the motor can operate normally and efficiently.

[0069] Preferably, Figure 1 and Figure 2 As shown, the nozzle assembly 3 is located above the motor cavity 11 and the shaft gear cavity 25 , so that the oil sprayed by the nozzle assembly 3 can cover all parts in the motor cavity 11 and the shaft gear cavity 25 .

[0070] In some embodiments of the present invention, Figure 1 and Figure 2As shown, the nozzle assembly 3 includes: a first nozzle 31 and a second nozzle 32. The first nozzle 31 is disposed on the second housing 2 and extends along the axial direction of the first housing 1. The first nozzle 31 is provided with a plurality of oil injection ports 33 spaced apart along the length direction of the first nozzle 31. The first nozzle 31 is used to spray oil into the motor cavity 11.

[0071] Since the multiple oil injection ports 33 are spaced apart along the length direction of the first nozzle 31, the efficiency of the first nozzle 31 in spraying oil into the motor cavity 11 is improved, and the uniformity of oil injection along the axial direction of the first housing 1 is also improved, thereby improving the working reliability of the electric drive system.

[0072] Furthermore, if Figure 1 and Figure 2 As shown, the second nozzle 32 is penetrated through the second housing 2 and extends along the axial direction of the first housing 1. The second nozzle 32 is provided with a plurality of oil injection ports 33 spaced apart along the length direction of the second nozzle 32. The second nozzle 32 is used to spray oil into the motor cavity 11 and the shaft gear cavity 25 at the same time.

[0073] It can be understood that, compared with the shaft gear cavity 25, the motor cavity 11 needs to accommodate more parts and structures, and the space in the motor cavity 11 is larger. By spraying oil into the motor cavity 11 through the first nozzle 31 and the second nozzle 32 at the same time, the required amount of oil in the motor cavity 11 can be met, while the space in the shaft gear cavity 25 is smaller, and the required amount of oil in the shaft gear cavity 25 can be met only by spraying oil through the second nozzle 32. At the same time, it can also avoid excessive oil in the shaft gear cavity 25, thereby ensuring the normal operation of the motor and gears and improving the working reliability of the electric drive system.

[0074] Since the multiple oil injection ports 33 are spaced apart along the length direction of the second nozzle 32, the efficiency of the second nozzle 32 in spraying oil into the motor cavity 11 and the shaft gear cavity 25 is improved, and the uniformity of the oil injection along the axial direction of the first housing 1 is also improved, thereby improving the working reliability of the electric drive system.

[0075] In addition, in the present invention, there is one oil injection port 33 on the second nozzle 32 located in the shaft gear cavity 25, but the present invention is not limited to this. There can be more oil injection ports 33 on the second nozzle 32 located in the shaft gear cavity 25, such as 2, 3, 4 or 5.

[0076] The electric drive system according to an embodiment of the present utility model is described below.

[0077] The electric drive system according to the embodiment of the present utility model includes the housing assembly 10 of the electric drive system mentioned above.

[0078] According to the electric drive system of the embodiment of the utility model, by setting the shell assembly 10 of the above-mentioned electric drive system, a motor cavity 11 is set in the first shell 1, at least one axial end of the first shell 1 is opened to form an open opening 12, a second shell 2 is set at the open opening 12, and a shaft gear cavity 25 is set in the second shell 2. The shaft gear cavity 25 and the motor cavity 11 are independent of each other and spaced apart, thereby avoiding the oil circuits in the shaft gear cavity 25 and the motor cavity 11 from being interconnected, thereby avoiding impurities such as iron filings in the shaft gear cavity 25 from being adsorbed on the motor and causing the motor to fail, thereby improving the service life of the motor and improving the working reliability of the electric drive system.

[0079] A vehicle according to an embodiment of the present invention is described below.

[0080] A vehicle according to an embodiment of the present utility model includes the above-mentioned electric drive system.

[0081] According to the vehicle of the embodiment of the utility model, the above-mentioned electric drive system is arranged, the housing assembly 10 of the above-mentioned electric drive system is arranged, a motor cavity 11 is arranged in the first housing 1, at least one axial end of the first housing 1 is opened to form an open opening 12, a second housing 2 is arranged at the open opening 12, and a shaft gear cavity 25 is arranged in the second housing 2, the shaft gear cavity 25 and the motor cavity 11 are independent of each other and spaced apart, thereby avoiding the oil circuits in the shaft gear cavity 25 and the motor cavity 11 from being interconnected, thereby avoiding impurities such as iron filings in the shaft gear cavity 25 from being adsorbed on the motor and causing the motor to fail, thereby improving the service life of the motor and improving the working reliability of the electric drive system.

[0082] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0083] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A housing assembly of an electric drive system, characterized in that: include: A first shell, wherein a motor cavity is formed in the first shell, and at least one axial end of the first shell is open to form an open opening; The second shell is arranged at the open opening to block the open opening, the number of the second shells is the same as the number of the open openings and corresponds one to one, the second shell has a shaft gear cavity, and the shaft gear cavity is independent of and spaced from the motor cavity.

2. The housing assembly of the electric drive system according to claim 1, characterized in that: The second housing comprises: a shell body, the shell body being connected to the first shell body and used for sealing the open opening; An end cover is connected to an end of the shell body away from the first shell body, and the shaft gear cavity is formed between the end cover and the shell body.

3. The housing assembly of the electric drive system according to claim 2, characterized in that: The bottom of the shell body is provided with an assembly cavity, the side of the assembly cavity facing the end cover is open, the end of the end cover facing the shell body has a limiting protrusion, at least part of the limiting protrusion extends into the assembly cavity, and the housing assembly of the electric drive system further includes: A magnet is disposed in the assembly cavity and abuts against the limiting protrusion.

4. The housing assembly of the electric drive system according to claim 2, characterized in that: The outer contour of the end surface of the shell body facing the first shell body and the outer contour of the end surface of the first shell body facing the shell body are consistent in shape and fit closely; And / or, the outer contour of the end surface of the shell body facing the end cover and the outer contour of the end surface of the end cover facing the shell body are consistent in shape and fit closely.

5. The housing assembly of the electric drive system according to claim 2, characterized in that: The shell body, the end cover and the first shell are connected by a positioning pin, the positioning pin and the first shell are interference fit, and the positioning pin and the shell body and the end cover are clearance fit; And / or, the shell body, the end cover and the first shell are connected by fasteners; And / or, a sealant is provided between the shell body and the first shell; And / or, a sealant is provided between the shell body and the end cover.

6. The housing assembly of the electric drive system according to claim 1, characterized in that: The bottom of the first housing has an oil cavity, which is located below and spaced from the motor cavity. The bottom wall of the motor cavity is provided with at least one first oil return hole, and the first oil return hole is used to connect the oil cavity with the motor cavity; And / or, a second oil return hole and a third oil return hole are provided on the wall surface of the second shell facing the first shell, the second oil return hole connects the oil chamber and the shaft gear chamber, the third oil return hole is located above the second oil return hole, and the third oil return hole is connected to the oil chamber through a connecting pipe.

7. The housing assembly of the electric drive system according to claim 6, characterized in that: Also includes: A nozzle assembly, wherein the nozzle assembly is connected to the oil chamber, the nozzle assembly is located in the motor chamber and the shaft gear chamber, the nozzle assembly extends along the axial direction of the first shell, and the nozzle assembly has a plurality of oil injection ports for spraying oil into the motor chamber and the shaft gear chamber.

8. The housing assembly of the electric drive system according to claim 7, characterized in that: A partition is provided in the first shell, and the partition divides the motor cavity into two sub-motor cavities spaced apart along the axial direction of the first shell. The two stators of the two motors are respectively located in the two sub-motor cavities. The partition has an installation space and a shell oil channel. The two rotors of the two motors are both arranged in the installation space. The shell oil channel is connected with the installation space, the oil cavity and the nozzle assembly.

9. The housing assembly of the electric drive system according to claim 7, characterized in that: The nozzle assembly comprises: a first nozzle, the first nozzle being disposed on the second housing and extending along the axial direction of the first housing, the first nozzle being provided with a plurality of oil injection ports spaced apart along the length direction of the first nozzle, the first nozzle being used for spraying oil into the motor cavity; The second nozzle is passed through the second shell and extends along the axial direction of the first shell. The second nozzle is provided with a plurality of oil injection ports spaced apart along the length direction of the second nozzle. The second nozzle is used for simultaneously spraying oil into the motor cavity and the shaft gear cavity.

10. An electric drive system, characterized in that: A housing assembly comprising an electric drive system according to any one of claims 1-9.

11. A vehicle, characterized in that: Comprising an electric drive system according to claim 10.

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