CN222262304U - Shell assembly of electric drive system, electric drive system and vehicle - Google Patents

Abstract

The utility model discloses a housing assembly of an electric drive system, an electric drive system and a vehicle. The housing assembly of the electric drive system includes: a first housing, wherein a motor cavity is provided in the first housing, 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 block the open opening, and the number of the second housings is the same as the number of the open openings and corresponds one to one, and wherein a shaft tooth cavity is provided in the second housing, and the shaft tooth cavity and the motor cavity are independent of each other and spaced apart. According to the housing assembly of the electric drive system of the utility model, the oil passages in the shaft tooth cavity and the motor cavity are prevented from being interconnected, thereby preventing impurities such as iron filings in the shaft tooth 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.

Description

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

Technical Field

The utility model relates to the technical field of electric drive systems, in particular to a shell assembly of an electric drive system, the electric drive system and a vehicle.

Background

At present, four-wheel independent driving electric drive systems designed by all main automobile enterprises in China are mutually communicated with a shaft tooth cavity and a motor cavity due to the reasons of configuration, structural arrangement and the like, and scrap iron in cooling oil can be stirred and adsorbed on a motor when gears run at high speed, so that the motor is easy to fail.

Disclosure of utility model

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the shell component of the electric drive system is provided, and impurities such as scrap iron in the shaft tooth cavity are prevented from being adsorbed on the motor to cause failure of the motor, so that the service life of the motor is prolonged, and the working reliability of the electric drive system is improved.

The utility model also provides an electric drive system, which comprises the shell component of the electric drive system.

The utility model further provides a vehicle comprising the electric drive system.

The shell assembly of the electric drive system comprises a first shell, a second shell and a third shell, wherein a motor cavity is arranged in the first shell, at least one end of the first shell in the axial direction is opened to form an open mouth, the second shell is arranged at the open mouth and used for blocking the open mouth, the number of the second shells is the same as that of the open mouths and corresponds to that of the open mouths one by one, and shaft tooth cavities are arranged in the second shell and are mutually independent and spaced from the motor cavity.

According to the shell component of the electric drive system, the motor cavity is formed in the first shell, at least one end of the first shell in the axial direction is opened to form an opening, the second shell is arranged at the opening, the shaft tooth cavity is arranged in the second shell, and the shaft tooth cavity and the motor cavity are mutually independent and are spaced apart, so that the oil way intercommunication between the shaft tooth cavity and the motor cavity is avoided, the phenomenon that impurities such as scrap iron in the shaft tooth cavity are adsorbed on the motor to cause failure of the motor is avoided, the service life of the motor is prolonged, and the working reliability of the electric drive system is improved.

In some embodiments of the utility model, the second housing comprises a housing body connected with the first housing for blocking the open mouth, and an end cover connected with one end of the housing body far away from the first housing, wherein the end cover and the housing body form the shaft tooth cavity.

In some embodiments of the utility model, the bottom of the shell body is provided with an assembling cavity, one side of the assembling cavity facing the end cover is open, one end of the end cover facing the shell body is provided with a limiting protrusion, at least part of the limiting protrusion extends into the assembling cavity, and the shell component of the electric drive system further comprises a magnet, wherein the magnet is arranged in the assembling cavity and is abutted against the limiting protrusion.

In some embodiments of the utility model, the outer contour of the end face of the shell body facing the first shell body and the outer contour of the end face of the first shell body facing the shell body are consistent and fit, 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 and fit.

In some embodiments of the present utility model, the shell body, the end cover and the first shell are connected by a positioning pin, the positioning pin is in interference fit with the first shell, the positioning pin is in clearance fit with the shell body and the end cover, and/or the shell body, the end cover and the first shell are connected by a fastener, and/or sealant is arranged between the shell body and the first shell, and/or sealant is arranged between the shell body and the end cover.

In some embodiments of the utility model, the bottom of the first shell is provided with an oil cavity, the oil cavity is positioned below the motor cavity and is spaced apart, the bottom wall of the motor cavity is provided with at least one first oil return hole, the first oil return hole is used for communicating the oil cavity with the motor cavity, and/or the wall surface of the second shell facing the first shell is provided with a second oil return hole and a third oil return hole, the second oil return hole is communicated with the oil cavity and the shaft tooth cavity, the third oil return hole is positioned above the second oil return hole, and the third oil return hole is communicated with the oil cavity through a connecting pipe.

In some embodiments of the utility model, the housing assembly of the electric drive system further comprises a nozzle assembly, wherein the nozzle assembly is communicated with the oil cavity, the nozzle assembly is positioned in the motor cavity and the shaft tooth cavity, the nozzle assembly extends along the axial direction of the first housing, and a plurality of oil injection ports are formed in the nozzle assembly and used for injecting oil into the motor cavity and the shaft tooth cavity.

In some embodiments of the present utility model, a partition plate is disposed in the first housing, the partition plate divides the motor cavity into two sub-motor cavities spaced apart along an axial direction of the first housing, two stators of the two motors are respectively located in the two sub-motor cavities, a mounting space and a housing oil duct are disposed in the partition plate, two rotors of the two motors are all disposed in the mounting space, and the housing oil duct is communicated with the mounting space, the oil chamber and the nozzle assembly.

In some embodiments of the utility model, the spray pipe assembly comprises a first spray pipe, a second spray pipe and a plurality of axial gear cavities, wherein the first spray pipe penetrates through the second shell and extends along the axial direction of the first shell, a plurality of oil injection ports are formed in the first spray pipe and are spaced along the length direction of the first spray pipe, the first spray pipe is used for injecting oil into the motor cavities, the second spray pipe penetrates through the second shell and extends along the axial direction of the first shell, a plurality of oil injection ports are formed in the second spray pipe and are spaced along the length direction of the second spray pipe, and the second spray pipe is used for injecting oil into the motor cavities and the axial gear cavities at the same time.

The electric drive system comprises the shell component of the electric drive system.

According to the electric drive system provided by the embodiment of the utility model, the motor cavity is arranged in the first shell, at least one end of the first shell in the axial direction is opened to form an open mouth, the second shell is arranged at the open mouth, and the shaft tooth cavity is arranged in the second shell and is mutually independent and spaced from the motor cavity, so that the oil way intercommunication between the shaft tooth cavity and the motor cavity is avoided, and impurities such as scrap iron in the shaft tooth cavity are prevented from being adsorbed on the motor to cause motor failure, thereby prolonging the service life of the motor and improving the working reliability of the electric drive system.

The vehicle comprises the electric drive system.

According to the vehicle provided by the embodiment of the utility model, the electric drive system is arranged, the shell component of the electric drive system is arranged, the motor cavity is arranged in the first shell, at least one end of the axial direction of the first shell is opened to form an open mouth, the second shell is arranged at the open mouth, the shaft tooth cavity is arranged in the second shell, and the shaft tooth cavity and the motor cavity are mutually independent and are spaced, so that the oil way intercommunication between the shaft tooth cavity and the motor cavity is avoided, the phenomenon that impurities such as scrap iron in the shaft tooth cavity are adsorbed on the motor to cause motor failure is avoided, the service life of the motor is prolonged, and the working reliability of the electric drive system is improved.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is an exploded view of a housing assembly of an electric drive system according to an embodiment of the present utility model;

FIG. 2 is an enlarged partial view of an exploded view of a housing assembly of an electric drive system according to an embodiment of the present utility model;

FIG. 3 is a side view of a housing body of a second housing of a housing assembly of an electric drive system according to an embodiment of the present utility model;

FIG. 4 is a side view of an end cap of a second housing of a housing assembly of an electric drive system according to an embodiment of the present utility model;

Fig. 5 is a perspective view of a housing assembly of an electric drive system according to an embodiment of the present utility model, wherein a part of the structure of the second housing is not shown.

Reference numerals:

10. a housing assembly of the electric drive system;

1. a first housing; 11 parts of motor cavity, 12 parts of opening, 13 parts of first oil return holes, 14 parts of positioning pins, 15 parts of partition boards;

2. The second shell, 21, the shell body, 211, an assembly cavity, 22, an end cover, 221, a limiting protrusion, 23, a second oil return hole, 24, a third oil return hole, 25, a shaft tooth cavity;

3. A spout assembly; 31, a first spray pipe, 32, a second spray pipe, 33, a fuel injection port;

4. and the shell oil duct.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

A housing assembly 10 of an electric drive system according to an embodiment of the present utility model is described below with reference to fig. 1-5.

As shown in fig. 1 and 2, a housing assembly 10 of an electric drive system according to an embodiment of the present utility model includes a first housing 1 and a second housing 2.

Specifically, referring to fig. 1 and 2, the first housing 1 has a motor cavity 11 therein, at least one axial end of the first housing 1 is opened to form an opening 12, the motor is located in the motor cavity 11, and the opening 12 is provided to facilitate mounting and dismounting of the motor. The second shells 2 are arranged at the open openings 12 and used for blocking the open openings 12, and the number of the second shells 2 is the same as the number of the open openings 12 and corresponds to one by one.

For example, in the present utility model, two openings 12 are formed by opening both ends of the first housing 1 in the axial direction, and two second housings 2 are formed, but the present utility model is not limited thereto, and one opening 12 may be formed by opening one end of the first housing 1 in the axial direction, and one second housing 2 may be formed.

Further, as shown in fig. 1 and 2, the second housing 2 has a shaft tooth chamber 25 therein, and the shaft tooth chamber 25 is independent from and spaced apart from the motor chamber 11. It can be understood that the gear is located in the shaft tooth cavity 25, when the electric drive system works, in order to avoid overheat of parts such as motor and gear affecting the performance of the electric drive system, the motor cavity 11 and the shaft tooth cavity 25 need to be cooled by applying cooling oil to the parts such as motor and gear, the gear will have certain abrasion during working, so as to generate impurities such as scrap iron, if the motor cavity and the shaft tooth cavity are mutually communicated, the impurities such as scrap iron will flow to the motor cavity along with the flow of oil, so that the impurities such as scrap iron are adsorbed on the motor, and the failure of the motor is easy to be caused.

In the utility model, the shaft tooth cavity 25 and the motor cavity 11 are mutually independent and are spaced, so that the oil way intercommunication between the shaft tooth cavity 25 and the motor cavity 11 is avoided, and the phenomenon that the motor is invalid due to the fact that impurities such as scrap iron in the shaft tooth cavity 25 are adsorbed on the motor is avoided, thereby prolonging the service life of the motor and improving the working reliability of an electric drive system.

The cooling oil in the motor chamber 11 and the shaft tooth chamber 25 can lubricate parts such as a motor and a gear, and cool the parts such as the motor and the gear.

According to the shell assembly 10 of the electric drive system, the motor cavity 11 is arranged in the first shell 1, at least one end of the first shell 1 in the axial direction is opened to form the opening 12, the second shell 2 is arranged at the opening 12, the shaft tooth cavity 25 is arranged in the second shell 2, and the shaft tooth cavity 25 and the motor cavity 11 are mutually independent and are separated, so that oil passage intercommunication between the shaft tooth cavity 25 and the motor cavity 11 is avoided, impurities such as scrap iron in the shaft tooth cavity 25 are prevented from being adsorbed on a motor to cause motor failure, the service life of the motor is prolonged, and the working reliability of the electric drive system is improved.

In some embodiments of the present utility model, as shown in fig. 1 and 2, the second housing 2 includes a housing body 21 and an end cap 22, where the housing body 21 is connected to the first housing 1 to block the open mouth 12, it is understood that the housing body 21 may better enable the shaft tooth cavity 25 and the motor cavity 11 to be independent and spaced apart from each other, so as to avoid oil communication between the shaft tooth cavity 25 and the motor cavity 11, and thus avoid impurities such as iron filings in the shaft tooth cavity 25 from being adsorbed on the motor to cause failure of the motor, thereby improving service life of the motor and improving operational reliability of the electric drive system.

Further, as shown in fig. 1 and 2, an end cap 22 is connected to an end of the case body 21 remote from the first case 1, and a shaft tooth cavity 25 is formed between the end cap 22 and the case body 21. It will be appreciated that the end of the first housing 1 facing the end cap 22 is open, so that the disassembly and assembly of parts such as gears is facilitated, and the end cap 22 is connected with the end of the housing body 21 far away from the first housing 1, so that the sealing of the shaft tooth cavity 25 can be achieved, parts in the shaft tooth cavity 25 such as gears can work normally, and oil leakage in the shaft tooth cavity 25 can also be avoided.

In some embodiments of the present utility model, as shown in fig. 3 and 4, the bottom of the housing body 21 is provided with a fitting cavity 211, a side of the fitting cavity 211 facing the end cap 22 is opened, an end of the end cap 22 facing the housing body 21 is provided with a limiting protrusion 221, at least a part of the limiting protrusion 221 extends into the fitting cavity 211, and the housing assembly 10 of the electric drive system further includes a magnet (not shown) disposed in the fitting cavity 211 and abutting against the limiting protrusion 221.

It can be appreciated that the arrangement of the magnet can adsorb impurities such as scrap iron generated by the gear operation in the shaft tooth cavity 25 around the assembly cavity 211, so that the flow of the impurities such as scrap iron along with oil in the shaft tooth cavity 25 is reduced, the entry of the impurities such as scrap iron into the bearing or the gear engagement surface along with the oil can be reduced, the service lives of the bearing and the gear are prolonged, the failure period of the oil can be prolonged, and the oil consumption of the electric drive system can be reduced.

Meanwhile, because the impurity density such as iron filings is large, the iron filings are easy to deposit at the bottom of the shell body 21, and the assembly cavity 211 is formed in the bottom of the shell body 21, so that the magnet can be arranged at the bottom of the shell body 21, and therefore, the magnet can better adsorb the impurities such as the iron filings, the failure period of oil products is further prolonged, and the oil consumption of an electric drive system can be reduced. Wherein, since the impurities such as the scrap iron are adsorbed at the bottom of the case body 21, the collision of the impurities such as the scrap iron with the parts such as the gears in the shaft tooth chamber 25 can also be reduced, thereby reducing the noise.

In addition, by the stopping of the limiting protrusion 221 and the magnet, the magnet can be better fixed in the assembling cavity 211, so that the magnet is prevented from leaving the assembling cavity 211 to damage the gear and other structures, and meanwhile, the collision between the magnet and the inner wall surface of the assembling cavity 211 is reduced, so that the noise is further reduced.

In some embodiments of the present utility model, as shown in fig. 1 and 2, the outer contour of the end surface of the case body 21 facing the first case 1 and the outer contour shape of the end surface of the first case 1 facing the case body 21 are identical and fit, thereby improving the sealing effect between the case body 21 and the first case 1 and reducing the leakage of oil. Meanwhile, the outer contour of the end face of the shell body 21 facing the first shell body 1 is consistent with the outer contour of the end face of the first shell body 1 facing the shell body 21, so that the structure is simple, the design difficulty and the manufacturing difficulty of the end face of the shell body 21 facing the first shell body 1 and the end face of the first shell body 1 facing the shell body 21 are reduced, and the production efficiency is improved.

Further, the outer contour of the end face of the case body 21 facing the end cap 22 is identical and fitted to the outer contour of the end face of the end cap 22 facing the case body 21. Thereby, the sealing effect between the case body 21 and the end cap 22 is improved, and the leakage of oil is reduced. Meanwhile, the outer contour of the end face of the shell body 21 facing the end cover 22 is consistent with the outer contour of the end face of the end cover 22 facing the shell body 21, so that the structure is simple, the design difficulty and the 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 are reduced, and the production efficiency is improved.

In some embodiments of the present utility model, as shown in fig. 1 and fig. 2, the shell body 21, the end cover 22 and the first shell 1 are connected by the positioning pin 14, and the positioning pin 14 can enable the shell body 21, the end cover 22 and the first shell 1 to be positioned, so that the shell body 21, the end cover 22 and the first shell 1 are ensured to be coaxial, and therefore, the fitting of the end surface of the shell body 21 facing the first shell 1 and the end surface of the first shell 1 facing the shell body 21 and the fitting of 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 facilitated, and the assembly efficiency is improved.

Further, as shown in fig. 1 and fig. 2, the positioning pin 14 is in interference fit with the first housing 1, and the positioning pin 14 is in clearance fit with the housing body 21 and the end cover 22, so that the positioning pin 14 is fixedly connected with the first housing 1, and the positioning pin 14 is in adjustable connection with the housing body 21 and the end cover 22, so that the housing body 21 and the end cover 22 are adjustable relative to the first housing 1, and the coaxial arrangement of the housing body 21 and the end cover 22 with the first housing 1 is facilitated, so that the fitting of the end face of the housing body 21 facing the first housing 1 and the end face of the first housing 1 facing the housing body 21 and the fitting of the end face of the housing body 21 facing the end cover 22 and the end face of the end cover 22 facing the housing body 21 are facilitated, and the assembly efficiency is improved.

Further, as shown in fig. 1 and 2, the case body 21, the end cap 22 and the first case 1 are connected by fasteners, thereby improving connection reliability between the case body 21, the end cap 22 and the first case 1, thereby improving sealability between the case body 21, the end cap 22 and the first case 1, and reducing leakage of oil.

Further, as shown in fig. 1 and 2, a sealant is provided between the case body 21 and the first case 1, and the end face of the case body 21 facing the first case 1 and the end face of the first case 1 facing the case body 21 are connected by the sealant, whereby the connection reliability between the case body 21 and the first case 1 is improved, and the tightness between the case body 21 and the first case 1 is also improved, so that the leakage of oil can be reduced.

Further, as shown in fig. 1 and 2, a sealant is provided between the case body 21 and the end cover 22, and the end face of the case body 21 facing the end cover 22 and the end face of the end cover 22 facing the case body 21 are connected by the sealant, thereby improving the connection reliability between the case body 21 and the end cover 22 and also improving the sealability between the case body 21 and the end cover 22, so that the leakage of oil can be reduced.

Preferably, in the present utility model, the shell body 21, the end cover 22 and the first shell 1 are connected by the positioning pin 14, 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 the sealant, meanwhile, 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 the sealant, and finally, the shell body 21, the end cover 22 and the first shell 1 are connected by the fastener, thereby improving the connection reliability between the shell body 21, the end cover 22 and the first shell 1, improving the tightness between the shell body 21, the end cover 22 and the first shell 1, reducing the leakage of oil, and being beneficial to the lamination 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 the lamination 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 the assembly efficiency.

In some embodiments of the present utility model, as shown in fig. 5, an oil cavity (not shown) is disposed at the bottom of the first housing 1, the oil cavity is located below the motor cavity 11 and is spaced apart from the motor cavity 11, at least one first oil return hole 13 is disposed on the bottom wall of the motor cavity 11, the first oil return hole 13 is used for communicating the oil cavity with the motor cavity 11, the first oil return hole 13 can enable oil in the motor cavity 11 to flow back into the oil cavity, and the oil in the oil cavity returns to the motor cavity 11 after passing through the suction filter, the oil pump and the oil cooler in sequence, so as to realize oil circulation, thereby reducing the oil consumption of the electric drive system.

Further, as shown in fig. 3, a second oil return hole 23 and a third oil return hole 24 are arranged on the wall surface of the second casing 2 facing the first casing 1, the second oil return hole 23 is directly communicated with the oil cavity and the shaft tooth cavity 25, the third oil return hole 24 is located above the second oil return hole 23, and the third oil return hole 24 is communicated with the oil cavity through a connecting pipe (not shown).

It can be understood that the second oil return hole 23 and the third oil return hole 24 can both enable oil in the shaft tooth cavity 25 to flow back into the oil cavity, and the oil in the oil cavity sequentially passes through the suction filter, the oil pump and the oil cooler and then returns into the shaft tooth cavity 25, so that oil circulation is realized, and the oil consumption of an electric drive system is reduced.

When the oil amount in the shaft tooth chamber 25 is small (the height of the oil amount is higher than the second oil return hole 23 but lower than the third oil return hole 24), the oil in the shaft tooth chamber 25 enters the oil chamber through the second oil return hole 23, and when the oil amount in the shaft tooth chamber 25 is large (the height of the oil amount is higher than the third oil return hole 24), the oil in the shaft tooth chamber 25 can flow into the oil chamber through both the second oil return hole 23 and the third oil return hole 24. Therefore, when the oil in the shaft tooth cavity 25 is too much, the third oil return hole 24 is arranged to accelerate the oil in the shaft tooth cavity 25 to flow to the oil cavity, so that the phenomenon that the gear work is affected due to the too much oil in the shaft tooth cavity 25 can be avoided, and the working reliability of the electric drive system is improved.

In addition, the third oil return hole 24 is communicated with the oil cavity through the connecting pipe, so that oil in the shaft tooth cavity 25 is prevented from flowing into the motor cavity 11, impurities such as scrap iron in the shaft tooth cavity 25 are further prevented from being adsorbed on the motor to cause failure of the motor, the service life of the motor is prolonged, and the working reliability of the electric drive system is improved.

Further, the second oil return hole 23 and the third oil return hole 24 are provided with filtering pieces, so that impurities such as scrap iron in the shaft tooth cavity 25 can be filtered, the impurities such as scrap iron are reduced, and enter the oil cavity, so that oil in the oil cavity is reduced, the impurities such as scrap iron are carried by the oil, and enter the oil circulation of the electric drive system, the impurities such as scrap iron in the shaft tooth cavity 25 are further reduced, and are adsorbed on the motor, so that the motor is invalid, the service life of the motor is prolonged, and the working reliability of the electric drive system is improved.

In some embodiments of the present utility model, as shown in fig. 1 and 2, the housing assembly 10 of the electric drive system further includes a nozzle assembly 3, wherein the nozzle assembly 3 is in communication with the oil chamber, the nozzle assembly 3 is located in the motor chamber 11 and the axial tooth chamber 25, the nozzle assembly 3 extends along the axial direction of the first housing 1, and a plurality of oil injection ports 33 are formed in the nozzle assembly 3 for injecting oil into the motor chamber 11 and the axial tooth chamber 25.

It will be appreciated that the electric drive system comprises a suction filter, an oil pump and an oil cooler, wherein one end of the suction filter is connected with the oil cavity, the other end of the suction filter is connected with the oil pump, and the other end of the oil pump is connected with the oil cooler, so that the spray pipe assembly 3 is communicated with the oil cavity. The oil pump is used for driving the flow of oil, the suction filter is used for filtering the impurity in the oil, and the oil cooler is used for cooling down the oil to make the oil that flows to in the spray tube subassembly 3 be cold oil, thereby make the oil can cool down for motor and gear.

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 order, so that the oil can cool and lubricate the motor and the gears.

In some embodiments of the present utility model, as shown in fig. 1 and 5, a partition 15 is provided in the first housing 1, the partition 15 divides the motor chamber 11 into two sub-motor chambers spaced apart in the axial direction of the first housing 1, two motors are provided, two stators of the two motors are respectively located in the two sub-motor chambers, a mounting space and a housing oil passage 4 are provided in the partition 15, two rotors of the two motors are all provided in the mounting space, and the housing oil passage 4 is all communicated with the mounting space, the oil chamber and the nozzle assembly 3.

It will be appreciated that the housing oil passage 4 communicates with the oil cooler such that the housing oil passage 4 communicates with the oil chamber, whereby oil in the oil chamber not only can flow through the housing oil passage 4 to the oil injection port 33 on the nozzle assembly 3 such that oil can be injected into the motor chamber 11 and the shaft tooth chamber 25 such that oil can cool and lubricate the stator and gear. Meanwhile, oil in the oil cavity can flow to the installation space through the suction filter, the oil pump, the oil cooler and the shell oil duct 4 in sequence, so that the temperature reduction and lubrication of the rotor are realized, and the motor can operate normally and efficiently.

Preferably, as shown in fig. 1 and 2, the nozzle assembly 3 is positioned above the motor cavity 11 and the shaft tooth cavity 25, so that the nozzle assembly 3 can be advantageously sprayed with oil to cover all the parts in the motor cavity 11 and the shaft tooth cavity 25.

In some embodiments of the present utility model, as shown in fig. 1 and 2, 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 in a penetrating manner and extends along the axial direction of the first housing 1, a plurality of oil injection ports 33 are disposed on the first nozzle 31 and are spaced apart along the length direction of the first nozzle 31, and the first nozzle 31 is used for injecting oil into the motor cavity 11;

Since the plurality of oil injection ports 33 are spaced apart along the length direction of the first nozzle 31, the efficiency of injecting oil into the motor cavity 11 by the first nozzle 31 is improved, and the uniformity of injecting oil along the axial direction of the first housing 1 is also improved, thereby improving the operational reliability of the electric drive system.

Further, as shown in fig. 1 and 2, the second nozzle 32 is disposed on the second housing 2 in a penetrating manner and extends along the axial direction of the first housing 1, a plurality of oil injection ports 33 spaced apart along the length direction of the second nozzle 32 are disposed on the second nozzle 32, and the second nozzle 32 is used for injecting oil into the motor cavity 11 and the shaft tooth cavity 25 at the same time.

It will be appreciated that, compared with the axial tooth cavity 25, the motor cavity 11 needs to accommodate more parts and structures, the space in the motor cavity 11 is larger, oil is sprayed to the motor cavity 11 through the first spray pipe 31 and the second spray pipe 32 at the same time, the required oil quantity in the motor cavity 11 can be met, the space of the axial tooth cavity 25 is smaller, the required oil quantity of the axial tooth cavity 25 can be met only through the oil spraying of the second spray pipe 32, and meanwhile, excessive oil quantity in the axial tooth cavity 25 can be avoided, so that the normal work of a motor and gears can be ensured, and the working reliability of an electric drive system is improved.

Since the plurality of oil injection ports 33 are spaced apart along the length direction of the second nozzle 32, the efficiency of injecting oil into the motor cavity 11 and the axial tooth cavity 25 by the second nozzle 32 is improved, and the uniformity of injecting oil along the axial direction of the first housing 1 is also improved, thereby improving the operational reliability of the electric drive system.

In addition, in the present utility model, the oil injection port 33 in the axial tooth chamber 25 on the second nozzle pipe 32 is one, but the present utility model is not limited thereto, and the number of the oil injection ports 33 in the axial tooth chamber 25 on the second nozzle pipe 32 may be more, for example, 2, 3, 4, 5, or the like.

An electro-drive system according to an embodiment of the present utility model is described below.

An electric drive system according to an embodiment of the present utility model includes the housing assembly 10 of the electric drive system described above.

According to the electric drive system provided by the embodiment of the utility model, through the arrangement of the shell assembly 10 of the electric drive system, the motor cavity 11 is arranged in the first shell 1, at least one axial end of the first shell 1 is opened to form the opening 12, the second shell 2 is arranged at the opening 12, the shaft tooth cavity 25 is arranged in the second shell 2, and the shaft tooth cavity 25 and the motor cavity 11 are mutually independent and spaced, so that the oil circuit intercommunication between the shaft tooth cavity 25 and the motor cavity 11 is avoided, and the phenomenon that the motor fails due to the adsorption of scrap iron and other impurities in the shaft tooth cavity 25 on the motor is avoided, so that the service life of the motor is prolonged, and the working reliability of the electric drive system is improved.

A vehicle according to an embodiment of the present utility model is described below.

The vehicle comprises the electric drive system.

According to the vehicle provided by the embodiment of the utility model, the electric drive system is arranged, the shell assembly 10 of the electric drive system is arranged, the motor cavity 11 is arranged in the first shell 1, at least one axial end of the first shell 1 is opened to form the opening 12, the second shell 2 is arranged at the opening 12, the shaft tooth cavity 25 is arranged in the second shell 2, and the shaft tooth cavity 25 and the motor cavity 11 are mutually independent and are spaced, so that the oil way intercommunication between the shaft tooth cavity 25 and the motor cavity 11 is avoided, and impurities such as scrap iron in the shaft tooth cavity 25 are prevented from being adsorbed on the motor to cause motor failure, so that the service life of the motor is prolonged, and the working reliability of the electric drive system is improved.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the utility model as defined by the appended claims and their equivalents.

Claims (11)

1. A housing assembly for an electric drive system, comprising:

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;

The second shell is arranged at the opening and used for blocking the opening, the number of the second shells is the same as that of the openings and corresponds to that of the openings one by one, and the second shells are internally provided with shaft tooth cavities which are mutually independent and spaced apart from the motor cavities.

2. The housing assembly of an electric drive system of claim 1, wherein the second housing comprises:

the shell body is connected with the first shell and used for blocking the open mouth;

The end cover is connected with one end, far away from the first shell, of the shell body, and the shaft tooth cavity is formed between the end cover and the shell body.

3. The housing assembly of an electric drive system of claim 2, wherein the bottom of the housing body is provided with an assembly cavity, a side of the assembly cavity facing the end cap is open, an end of the end cap facing the housing body is provided with a limit protrusion, at least a portion of the limit protrusion extends into the assembly cavity, and the housing assembly of the electric drive system further comprises:

The magnet is arranged in the assembly cavity and is abutted against the limiting protrusion.

4. The housing assembly of an electric drive system according to claim 2, wherein an outer contour of an end face of the housing body facing the first housing and an outer contour of an end face of the first housing facing the housing body are identical in shape and fit;

And/or the outer contour of the end face of the shell body facing the end cover is consistent with and is attached to the outer contour of the end face of the end cover facing the shell body.

5. The housing assembly of an electric drive system of claim 2, wherein the housing body, the end cap, and the first housing are connected by a dowel, wherein the dowel is in an interference fit with the first housing, and wherein the dowel is in a clearance fit with both the housing body and the end cap;

and/or, the shell body, the end cover and the first shell are connected through fasteners;

And/or sealant is arranged between the shell body and the first shell;

And/or a sealant is arranged between the shell body and the end cover.

6. The housing assembly of an electric drive system of claim 1 wherein a bottom portion of the first housing has an oil cavity, the oil cavity being spaced below 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 for communicating the oil cavity with the motor cavity;

And/or, a second oil return hole and a third oil return hole are formed in the wall surface, facing the first shell, of the second shell, the second oil return hole is communicated with the oil cavity and the shaft tooth cavity, the third oil return hole is located above the second oil return hole, and the third oil return hole is communicated with the oil cavity through a connecting pipe.

7. The housing assembly of an electric drive system of claim 6, further comprising:

The spray pipe assembly is communicated with the oil cavity, the spray pipe assembly is located in the motor cavity and the shaft tooth cavity, the spray pipe assembly extends along the axial direction of the first shell, and a plurality of oil injection ports are formed in the spray pipe assembly and are used for injecting oil into the motor cavity and the shaft tooth cavity.

8. The housing assembly of an electric drive system of claim 7, wherein a partition is provided in the first housing, the partition dividing the motor cavity into two sub-motor cavities spaced apart along an axial direction of the first housing, two stators of the two motors are respectively located in the two sub-motor cavities, the partition having a mounting space and a housing oil passage therein, two rotors of the two motors are both provided in the mounting space, and the housing oil passage is in communication with the mounting space, the oil chamber, and the nozzle assembly.

9. The housing assembly of an electric drive system of claim 7, wherein the spout assembly comprises:

The first spray pipe penetrates through the second shell and extends along the axial direction of the first shell, a plurality of oil injection ports are formed in the first spray pipe and are spaced apart along the length direction of the first spray pipe, and the first spray pipe is used for injecting oil into the motor cavity;

The second spray pipe penetrates through the second shell and extends along the axial direction of the first shell, a plurality of oil injection ports are formed in the second spray pipe and are spaced apart in the length direction of the second spray pipe, and the second spray pipe is used for injecting oil to the motor cavity and the shaft tooth cavity simultaneously.

10. An electric drive system, characterized by comprising a housing assembly of an electric drive system according to any of claims 1-9.

11. A vehicle comprising an electric drive system as claimed in claim 10.