CN215153941U - Electric drive system and electric automobile - Google Patents

Abstract

The utility model discloses an electric drive system and electric automobile. The electric drive system comprises a motor, a reduction box and a motor bearing; the motor comprises a motor shell and a motor rotating shaft; the reduction gearbox comprises a reduction gearbox input shaft and a reduction gearbox shell; the input shaft of the reduction gearbox is connected with the rotating shaft of the motor; the motor shell with the cooperation of gear box shell forms integrated casing, be equipped with bearing room and lubricating oil cavity on the integrated casing, the motor bearing housing is established in last and being located of motor shaft in the bearing room, still including setting up first cooling body on the integrated casing, first cooling body is located the bearing room with on the position that lubricating oil cavity corresponds. First cooling body both can cool down the motor bearing in the bearing chamber, can cool down to the lubricating oil in the lubricating oil cavity again, avoids the high temperature to ensure electric drive system's performance.

Description

Electric drive system and electric automobile

Technical Field

The utility model relates to an electric drive system technical field especially relates to an electric drive system and electric automobile.

Background

The electric automobile is generally provided with an electric drive system at present, the electric drive system comprises a motor and a reduction gearbox, the motor comprises a motor shell and a motor rotating shaft, the reduction gearbox comprises a reduction gearbox input shaft and a reduction gearbox shell, the reduction gearbox input shaft is connected with the motor rotating shaft, and a motor bearing is assembled between the motor rotating shaft and the bearing position. In the working process of the electric drive system, namely the rotating process of the motor rotating shaft and the input shaft of the reduction gearbox, the temperature of lubricating oil and the motor rotating shaft in the reduction gearbox is overhigh, and the performance of the electric drive system is influenced.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides an electric drive system and electric automobile to solve the too high problem of temperature of lubricating oil and motor shaft in the reducing gear box.

The utility model provides an electric drive system, which comprises a motor, a reduction box and a motor bearing; the motor comprises a motor shell and a motor rotating shaft; the reduction gearbox comprises a reduction gearbox input shaft and a reduction gearbox shell; the input shaft of the reduction gearbox is connected with the rotating shaft of the motor; the motor shell with the cooperation of gear box shell forms integrated casing, be equipped with bearing room and lubricating oil cavity on the integrated casing, the motor bearing housing is established in last and being located of motor shaft in the bearing room, still including setting up first cooling body on the integrated casing, first cooling body is located the bearing room with on the position that lubricating oil cavity corresponds.

Preferably, the first cooling mechanism is provided at a position corresponding to the lubricating oil chamber on the periphery of a bearing chamber where the motor bearing is fitted.

Preferably, the first cooling mechanism comprises a cooling water channel and a cooling cover plate; the cooling water channel is arranged on the periphery of a bearing chamber for assembling the motor bearing and at a position corresponding to the lubricating oil cavity; the cooling cover plate is arranged on the side face of the cooling water channel and matched with the cooling water channel to form a sealed cavity.

Preferably, the cooling cover plate is provided on an end face of the integrated housing.

Preferably, the cooling water channel is arranged around the periphery of a bearing chamber provided with the motor bearing, one side surface of the cooling water channel is connected with the cooling cover plate, and the other side surface of the cooling water channel is connected with the integrated shell at the corresponding position of the lubricating oil cavity.

Preferably, the cooling water channel and the cooling cover plate are C-shaped.

Preferably, the first cooling mechanism further comprises a water inlet nozzle and a water outlet nozzle which are connected with the cooling water channel, and the water inlet nozzle and the water outlet nozzle are used for being connected with a cooling liquid supply system.

Preferably, an outgoing line avoiding area is arranged on the integrated shell, and the first cooling mechanism is located outside the outgoing line avoiding area.

Preferably, the motor housing comprises a motor inner shell and a motor outer shell, and the motor inner shell and the motor outer shell are matched to form the second cooling mechanism.

The utility model provides an electric automobile, including above-mentioned electric drive system.

An embodiment of the utility model provides an electric drive system and electric automobile sets up first cooling body on electric drive system, first cooling body sets up on the integrated casing, and is located the bearing room with on the position that lubricating oil pocket corresponds, both can realize cooling down the motor bearing in the bearing room, can realize again cooling down the lubricating oil in the lubricating oil cavity, avoid the high temperature to ensure electric drive system's performance.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic structural diagram of an electric drive system according to an embodiment of the present invention;

fig. 2 is another schematic structural diagram of an electric drive system according to an embodiment of the present invention;

fig. 3 is a cross-sectional view taken along line a-a of fig. 2.

In the figure: 10. an integrated housing; 11. a motor housing; 111. a motor inner casing; 112. a motor housing; 12. a gearbox housing; 13. a bearing chamber; 14. a lubricating oil cavity; 15. an outgoing line avoidance area; 20. a first cooling mechanism; 21. a cooling water channel; 22. cooling the cover plate; 30. a second cooling mechanism.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to further explain the present invention in detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and to simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The utility model provides an electric drive system, which comprises a motor, a reduction box and a motor bearing; the motor comprises a motor shell 11 and a motor rotating shaft; the reduction gearbox comprises a reduction gearbox input shaft and a reduction gearbox shell 12; the input shaft of the reduction box is connected with the rotating shaft of the motor; the motor shell 11 and the reduction gearbox shell 12 are matched to form an integrated shell 10, a bearing chamber 13 and a lubricating oil chamber 14 are arranged on the integrated shell 10, a motor bearing is sleeved on a motor rotating shaft and located in the bearing chamber 13, the integrated shell further comprises a first cooling mechanism 20 arranged on the integrated shell 10, and the first cooling mechanism 20 is located at a position corresponding to the bearing chamber 13 and the lubricating oil chamber 14.

As an example, an electric drive system integrates a motor and a reduction gearbox. The motor includes a motor housing 11 and a motor shaft. The reduction gearbox includes a gearbox input shaft and a gearbox housing 12. The input shaft of the reduction gearbox is connected with the motor rotating shaft, the reduction gearbox bearing is sleeved on the input shaft of the reduction gearbox, the motor bearing is sleeved on the motor rotating shaft, and in order to improve the integration level of the electric drive system, the motor shell 11 and the reduction gearbox shell 12 need to be integrated into a whole to form an integrated shell 10. In this example, a bearing chamber 13 and a lubricating oil chamber 14 are provided in the integrated housing 10, wherein the bearing chamber 13 is a space for assembling a bearing. The lubricating oil chamber 14 is a chamber for storing lubricating oil. The lubricating oil cavity 14 can be a cavity formed by matching the outer side of the motor shell 11 and the reduction gearbox shell 12, and the lubricating oil cavity 14 is communicated with the reduction gearbox and used for providing lubricating oil for the reduction gearbox. The reduction box bearing and the motor bearing are both arranged in a bearing chamber 13 of the integrated shell 10, and an oil seal needs to be arranged between the reduction box bearing and the motor bearing in order to avoid that lubricating oil in the reduction box enters the motor and influences the normal work of the motor.

Because motor shaft and reducing gear box input shaft rotate the in-process, can produce a large amount of heats, make the temperature of motor shaft and the temperature rise of the lubricating oil that stores in the lubricating oil chamber 14, influence electric drive system's performance, need set up first cooling body 20 on electric drive system, first cooling body 20 sets up on integrated casing 10, and be located bearing room 13 and the corresponding position of lubricating oil chamber 14, both can realize cooling down the motor bearing in the bearing room 13, can realize cooling down the lubricating oil in the lubricating oil chamber 14 again, avoid the high temperature, thereby ensure electric drive system's performance.

In one embodiment, the first cooling mechanism 20 is disposed at a position corresponding to the lubricating oil chamber 14 on the periphery of the bearing chamber 13 where the motor bearing is assembled.

In this example, a bearing chamber 13 for assembling a bearing is formed on the integrated housing 10, and the reduction gear box bearing, the oil seal and the motor bearing are assembled on the integrated housing 10 at a position corresponding to the bearing chamber 13, so that the first cooling mechanism 20 is disposed at the periphery of the bearing chamber 13 for assembling the motor bearing, and the motor bearing can be cooled. Because the lubricating oil cavity 14 is communicated with the reduction gearbox and is used for providing lubricating oil for the reduction gearbox, specifically, the lubricating oil cavity can be formed by matching the outer side of the motor shell 11 with the reduction gearbox shell 12, and the first cooling mechanism 20 is arranged on the integrated shell 10 at a position corresponding to the lubricating oil cavity 14, the lubricating oil in the lubricating oil cavity 14 can be cooled, so that the performance of the electric drive system is effectively guaranteed.

In one embodiment, the first cooling mechanism 20 includes a cooling water channel 21 and a cooling cover plate 22; the cooling water channel 21 is arranged at the periphery of the bearing chamber 13 for assembling the motor bearing and at the position corresponding to the lubricating oil cavity 14; the cooling cover plate 22 is arranged on the side surface of the cooling water channel 21 and matched with the cooling water channel 21 to form a sealed cavity.

In this example, the first cooling mechanism 20 includes a cooling water channel 21 and a cooling cover plate 22, the cooling water channel 21 is disposed at a position corresponding to the lubricating oil cavity 14 on the periphery of the bearing chamber 13 where the motor bearing is assembled, and then the cooling cover plate 22 and one side surface of the cooling water channel 21 are welded into a whole by friction welding, so that the cooling cover plate 22 and the cooling water channel 21 cooperate to form a sealed cavity for accommodating the cooling liquid, and the cooling liquid flowing in the sealed cavity is utilized to cool the lubricating oil in the motor bearing and the lubricating oil cavity 14, which is helpful for ensuring the performance of the electric drive system. Moreover, the first cooling mechanism 20 formed by matching the cooling water channel 21 and the cooling cover plate 22 is convenient to machine and assemble, and is beneficial to improving the machining and assembling efficiency of the integrated shell 10.

In one embodiment, a cooling cover 22 is provided on the end face of the integrated housing 10.

In this example, the cooling cover 22 is disposed on an end face of the integrated housing 10, specifically, on a corresponding end face of the motor housing 11, so that the first cooling mechanism 20 formed in cooperation with the cooling cover 22 can be disposed on the periphery of the bearing chamber 13 of the motor bearing.

In one embodiment, the cooling water channel 21 is disposed around the outer periphery of the bearing chamber 13 where the motor bearing is assembled, and one side surface of the cooling water channel 21 is connected to the cooling cover plate 22, and the other side surface is connected to the integrated housing 10 at a position corresponding to the lubricating oil chamber 14.

Because the motor bearing is sleeved on the motor rotating shaft and is located in the bearing chamber 13 and is arranged in a circular ring shape, the cooling water channel 21 needs to be arranged around the periphery of the bearing chamber 13 for assembling the motor bearing, so that the motor bearing in the bearing chamber 13 is cooled by the first cooling mechanism 20 formed by matching the cooling water channel 21 and the cooling cover plate 22. In this example, the cooling water channel 21 is disposed around the periphery of the bearing chamber 13, such that two side surfaces perpendicular to the rotation axis of the motor are formed, and one of the two side surfaces is connected to the cooling cover plate 22, that is, the cooling water channel 21 and the cooling cover plate 22 are welded into a sealed cavity by friction welding; the other side is connected with the integrated shell 10 at the corresponding position of the lubricating oil cavity 14 so as to cool the lubricating oil in the lubricating oil cavity 14.

In one embodiment, the integrated housing 10 is provided with an outlet avoidance area 15, and the first cooling mechanism 20 is located outside the outlet avoidance area 15.

In this example, the integrated housing 10 is provided with an outgoing line avoiding region 15, the outgoing line avoiding region 15 is a region reserved on the integrated housing 10 for three-phase outgoing lines of the motor, and the first cooling mechanism 20 needs to be disposed on the integrated housing 10 except for the outgoing line avoiding region 15, so as to ensure the realization of the functions of the electric drive system, in an embodiment, the cooling water channel 21 and the cooling cover plate 22 are C-shaped.

In this example, since the cooling water channel 21 needs to surround the periphery of the bearing chamber 13 of the motor bearing, and the integrated housing 10 is provided with the outlet avoiding region 15, the cooling water channel 21 is arranged in a C shape and surrounds the periphery of the bearing chamber 13 of the motor bearing and the part outside the outlet avoiding region 15, so that the installation of the motor can be ensured, and the temperature of the lubricating oil in the motor bearing and the lubricating oil cavity 14 assembled in the bearing chamber 13 can be reduced. Correspondingly, the cooling cover plate 22 is also C-shaped, so that it can be assembled on the integrated shell 10 outside the outlet avoiding region 15, and forms a sealed cavity in cooperation with the cooling water channel 21.

In one embodiment, the first cooling mechanism 20 further comprises a water inlet and a water outlet connected to the cooling water channel 21, and the water inlet and the water outlet are used for connecting to a cooling liquid supply system.

In this example, in order to ensure the flow of the cooling liquid in the first cooling mechanism 20, a water inlet nozzle and a water outlet nozzle are required to be arranged and connected with the cooling liquid supply system through the water inlet nozzle and the water outlet nozzle, so as to ensure that the first cooling mechanism 20 can realize the cooling effect. The coolant supply system is a mechanism for supplying coolant in addition to the electric drive system.

In one embodiment, the motor housing 11 includes a motor inner shell 111 and a motor outer shell 112, and the motor inner shell 111 and the motor outer shell 112 cooperate to form the second cooling mechanism 30.

In an embodiment, the motor housing 11 includes a motor inner housing 111 and a motor outer housing 112, the motor inner housing 111 and the motor outer housing 112 cooperate to form the second cooling mechanism 30, and the cooling liquid flowing through the second cooling mechanism 30 can cool the motor and ensure the working performance of the motor.

An electric vehicle comprises a cooling system and the electric drive system in the above embodiment, wherein the cooling system is connected with a first cooling mechanism 20 in the electric drive system.

In the electric vehicle, the cooling system is a system for supplying the first cooling mechanism 20 in the electric drive system with the coolant, i.e., a coolant supply system. Specifically, the cooling system can be connected with the electric drive system through a water inlet nozzle and a water outlet nozzle, so that cooling liquid flows in the cooling system and the electric drive system, and a cooling effect is realized. In this embodiment, the first cooling mechanism 20 is disposed on the electric drive system, and the first cooling mechanism 20 is disposed on the integrated housing 10 and located at a position corresponding to the bearing chamber 13 and the lubricating oil chamber 14, so that not only can the motor bearing in the bearing chamber 13 be cooled, but also the lubricating oil in the lubricating oil chamber 14 can be cooled, and thus, the temperature is prevented from being too high, and the performance of the electric drive system is ensured.

The above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.

Claims (10)

1. An electric drive system comprises a motor, a reduction box and a motor bearing; the motor comprises a motor shell and a motor rotating shaft; the reduction gearbox comprises a reduction gearbox input shaft and a reduction gearbox shell; the input shaft of the reduction gearbox is connected with the rotating shaft of the motor; the motor shell and the reduction gearbox shell are matched to form an integrated shell, a bearing chamber and a lubricating oil cavity are formed in the integrated shell, a bearing sleeve of the motor is arranged on a rotating shaft of the motor and located in the bearing chamber, the motor shell further comprises a first cooling mechanism arranged on the integrated shell, and the first cooling mechanism is located in the bearing chamber and on the position corresponding to the lubricating oil cavity.

2. The electric drive system as recited in claim 1, wherein said first cooling mechanism is disposed at a position corresponding to said lubricant chamber on the periphery of a bearing chamber in which said motor bearing is fitted.

3. The electric drive system of claim 2, wherein the first cooling mechanism includes a cooling gallery and a cooling cover plate; the cooling water channel is arranged on the periphery of a bearing chamber for assembling the motor bearing and at a position corresponding to the lubricating oil cavity; the cooling cover plate is arranged on the side face of the cooling water channel and matched with the cooling water channel to form a sealed cavity.

4. The electric drive system of claim 3, wherein the cooling cover plate is disposed on an end face of the integrated housing.

5. The electric drive system of claim 3 wherein said cooling water channel is circumferentially disposed about a bearing housing in which said motor bearings are mounted, said cooling water channel being connected on one side to said cooling cover plate and on the other side to said integrated housing at a location corresponding to said lubricant reservoir.

6. The electric drive system of claim 3, wherein said cooling water channel and said cooling cover plate are C-shaped.

7. The electric drive system of claim 3 wherein said first cooling mechanism further comprises a water inlet and a water outlet connected to said cooling water channel, said water inlet and said water outlet for connection to a coolant supply system.

8. An electric drive system as recited in claim 1, wherein said integrated housing is provided with an outlet bypass area, said first cooling mechanism being located outside of said outlet bypass area.

9. The electric drive system of claim 1 wherein the motor housing comprises an inner motor shell and an outer motor shell that cooperate to form the second cooling mechanism.

10. An electric vehicle comprising an electric drive system as claimed in any one of claims 1 to 9.

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