Shell of dual-motor driving system and dual-motor driving system
By designing separate oil and water chambers in the dual-motor drive system and combining them with die-casting, the problems of uneven oil distribution and water leakage were solved, achieving independent oil storage and water isolation, thus improving the system's sealing and reliability.
Patent Information
- Application Number
- CN202520442096.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-13
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-03-13
AI Technical Summary
In a dual-motor drive system, the oil in the oil pan is prone to uneven distribution when the vehicle turns or tilts, resulting in oil shortage on one side of the chamber. Furthermore, drilling the water channel may lead to shrinkage defects and the risk of water and oil leakage.
The design separates the first and second oil collection chambers, which are isolated by a water chamber. The bottom shell is used to seal the opening, and the process is die-cast to avoid drilling, ensuring independent storage of oil and isolation of the water system.
It effectively avoids the problem of oil flow when the vehicle is turning or tilting, reduces the risk of pinhole defects and water and oil leakage, and improves the sealing performance and reliability of the system.
Smart Images
Figure CN223904873U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of vehicle power systems, in particular to a housing of a dual-motor drive system and a dual-motor drive system. BACKGROUND
[0002] In one possible dual-motor drive system, the bottom of the housing body is provided with an oil cavity, and the opening of the oil cavity is connected with an oil pan. The cavity formed by the oil cavity and the oil pan stores oil for the two motors and the two reduction boxes. The oil cavity further passes through two water passage channels, which can be used to connect the water outlet of the controller and the water inlet of the heat exchanger.
[0003] The technical solutions of the above dual-motor drive system have the following disadvantages:
[0004] (1) When the vehicle turns left or right or drives on an inclined road, the oil in the oil pan will quickly flow into the cavity on one side, resulting in a lack of oil in the cavity on the other side.
[0005] (2) The water passage channels pass through the oil cavity, but the housing body cannot form the water passage channels by pre-casting. The water passage channels need to be formed by drilling, which may cause shrinkage defects to be exposed, thereby causing the risk of water and oil leakage. CONTENT OF THE INVENTION
[0006] The present application aims to provide a housing of a dual-motor drive system to solve or alleviate the disadvantages in the background art. The present application also provides a dual-motor drive system.
[0007] The present application provides a housing of a dual-motor drive system, the dual-motor drive system comprising two motors and two reducers, the housing comprising:
[0008] a housing body, the housing body being provided with a containing cavity, a first oil collecting cavity and a second oil collecting cavity, the containing cavity being used to at least partially contain the motors and the reducers, the first oil collecting cavity and the second oil collecting cavity being located at the bottom of the housing body, the first oil collecting cavity and the second oil collecting cavity both being in communication with the containing cavity, and the first oil collecting cavity and the second oil collecting cavity being separated; and
[0009] a bottom shell connected to the housing body, the bottom shell closing the openings of the first oil collecting cavity and the second oil collecting cavity.
[0010] In at least one possible implementation, the housing body is further provided with a water cavity, a first partition wall and a second partition wall,
[0011] The water cavity is located at the bottom of the shell body, and the water cavity is located between the first oil collection cavity and the second oil collection cavity, the first oil collection cavity and the water cavity are separated by the first partition wall, and the second oil collection cavity and the water cavity are separated by the second partition wall.
[0012] In at least one possible implementation, the first oil collection cavity, the water cavity, and the second oil collection cavity are isolated from each other and not in communication with each other,
[0013] In the axial direction of the shell, the width of the water cavity is 1 / 8 to 2 times the width of the first oil collection cavity and / or the second oil collection cavity.
[0014] In at least one possible implementation, the shell body is provided with a heat exchanger channel and a controller channel, one end of the heat exchanger channel is communicated with the water cavity, the other end of the heat exchanger channel is communicated with a heat exchanger interface provided on the shell, one end of the controller channel is communicated with the water cavity, and the other end of the controller channel is communicated with a mounting cavity of a controller assembly provided on the shell.
[0015] In at least one possible implementation, the heat exchanger channel and the controller channel are respectively arranged on opposite sides of the water cavity, and the opening formed by the heat exchanger channel in the water cavity and the opening formed by the controller channel in the water cavity are respectively located on opposite inner wall surfaces of the water cavity.
[0016] In at least one possible implementation, a plurality of ribs are arranged on the side of the bottom shell facing the shell body, the ribs correspond to the edges of the openings of the cavities in the bottom of the shell body, the ribs are tightly fitted with the end surfaces of the openings,
[0017] The ribs include two partition wall ribs, the two partition wall ribs are respectively fitted with the first partition wall and the second partition wall,
[0018] The ribs are provided with through holes, the end surfaces of the openings are provided with threaded mounting holes, the through holes and the threaded mounting holes are coaxially arranged, and the bottom shell is connected to the shell body by screwing bolts through the through holes into the threaded mounting holes.
[0019] In at least one possible implementation, at least one recess is formed on the side of the bottom shell facing the shell body, the recess corresponds to at least one of the first oil collection cavity, the second oil collection cavity, and the water cavity,
[0020] A protrusion is formed on the side of the bottom shell away from the shell body, the position of the protrusion corresponds to the recess.
[0021] In at least one possible implementation, the shell is a metal die-cast shell.
[0022] The application also provides a double-motor driving system comprising the shell, two motors and two reducers according to any one of the technical solutions.
[0023] In at least one possible implementation, the first reducer, the first motor, the second motor and the second reducer are arranged in sequence in the axial direction of the shell,
[0024] The first oil collection cavity is in communication with the cavity of the shell in which the first reducer and the first motor are arranged, and is used for storing oil for cooling the first reducer and the first motor;
[0025] The second oil collection cavity is in communication with the cavity of the shell in which the second reducer and the second motor are arranged, and is used for storing oil for cooling the second reducer and the second motor,
[0026] The double-motor driving system further comprises two heat exchangers and two controller assemblies, and the water cavity is connected with the two heat exchangers and is used for cooling the two controller assemblies.
[0027] By adopting the above technical solution, the first oil collection cavity and the second oil collection cavity are arranged separately, so that when the vehicle turns left or right or drives on an inclined road, the oil in the two oil collection cavities cannot flow into each other, thereby relieving or avoiding the problem of oil shortage in the single-side cavity. BRIEF DESCRIPTION OF DRAWINGS
[0028] Figure 1 FIG. 1 shows a structural schematic diagram of a double-motor driving system according to an embodiment of the application.
[0029] Figure 2 FIG. 2 shows a structural schematic diagram of a shell body, a first end cover, a second end cover and a heat exchanger of a double-motor driving system according to an embodiment of the application.
[0030] Figure 3 FIG. 3 shows a structural schematic diagram of a bottom shell of a double-motor driving system according to an embodiment of the application.
[0031] Figure 4 FIG. 4 shows a structural schematic diagram of the bottom shell of the double-motor driving system from another angle according to an embodiment of the application.
[0032] REFERENCE SIGNS
[0033] 1 shell body 11 first oil collection cavity 12 second oil collection cavity 13 water cavity 14 first partition wall 15 second partition wall 16 heat exchanger passage 17 controller passage 18 accommodating cavity
[0034] 2 bottom shell 21 convex rib 211 partition wall convex rib 22 recessed portion 23 protrusion 24 bolt
[0035] 3 heat exchanger
[0036] 4 first end cover
[0037] 5 second end cover DETAILED DESCRIPTION
[0038] In order to more clearly illustrate the above objects, features and advantages of the present application, a specific embodiment will be described in detail in this section with reference to the accompanying drawings. In addition to the various embodiments described in this section, the present application can be implemented in other different ways, and those skilled in the art can make corresponding improvements, modifications and substitutions without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed in this section. The scope of protection of the present application should be subject to the claims.
[0039] As shown in Figures 1 to 4 , the embodiment of the present application proposes a dual-motor drive system which can be used as a power unit for a pure electric vehicle or a hybrid electric vehicle.
[0040] The dual-motor drive system includes a housing, two motors (a first motor, a second motor), two reducers (a first reducer, a second reducer), heat exchangers 3 (for example, two) and controller assemblies (for example, two). The two motors and the two reducers can be arranged inside the housing, and the heat exchangers 3 and the controller assemblies can be connected to the housing. The controller assembly can be used to control the operation of the motor.
[0041] In the axial direction of the housing, the first reducer, the first motor, the second motor and the second reducer are arranged in sequence.
[0042] The housing includes a housing main body 1, a bottom shell 2, a first end cover 4 and a second end cover 5. The housing main body 1 can be generally cylindrical, and has a receiving cavity 18 that can at least partially accommodate the two motors and the two reducers. The first end cover 4 and the second end cover 5 are respectively connected to the two ends of the housing main body 1 in the axial direction.
[0043] As shown in Figure 2 , the housing main body 1 is provided with a first oil collecting cavity 11, a second oil collecting cavity 12, a water cavity 13, a first partition wall 14 and a second partition wall 15.
[0044] In the mounted state of the dual-motor drive system in the vehicle, the first oil collecting cavity 11, the second oil collecting cavity 12 and the water cavity 13 are all located at the bottom of the housing main body 1. The first oil collecting cavity 11 and the second oil collecting cavity 12 are used to partially accommodate oil for cooling the motor and / or lubricating the gear and bearing, and the water cavity 13 is used to partially accommodate liquid (such as water) for cooling the controller assembly.
[0045] The water cavity 13 is connected with two heat exchangers for cooling two controller assemblies. The first oil collecting cavity 11 is in communication with the cavity of the first housing for mounting the first speed reducer and the first motor, for storing oil for cooling the first speed reducer and the first motor. The second oil collecting cavity 12 is in communication with the cavity of the second housing for mounting the second speed reducer and the second motor, for storing oil for cooling the second speed reducer and the second motor.
[0046] The first oil collecting cavity 11 and the second oil collecting cavity 12 can be provided with openings at the top, so that the first oil collecting cavity 11 and the second oil collecting cavity 12 are both in communication with the containing cavity 18, and the oil in the containing cavity 18 can flow into the first oil collecting cavity 11 and the second oil collecting cavity 12. The water cavity 13 is separated from the containing cavity 18.
[0047] The first oil collecting cavity 11 and the second oil collecting cavity 12 are separated, for example, the water cavity 13 can be located between the first oil collecting cavity 11 and the second oil collecting cavity 12, and the first oil collecting cavity 11, the second oil collecting cavity 12 and the water cavity 13 are completely independent of each other and do not communicate with each other. The first oil collecting cavity 11, the water cavity 13 and the second oil collecting cavity 12 can be arranged in sequence along the axial direction of the double-motor drive system. The first oil collecting cavity 11 and the water cavity 13 can be separated by a first partition wall 14, and the second oil collecting cavity 12 and the water cavity 13 can be separated by a second partition wall 15.
[0048] The first partition wall 14 and the second partition wall 15 separate a rectangular cavity into three parts, namely the first oil collecting cavity 11, the second oil collecting cavity 12 and the water cavity 13. The structure of the three cavities can be directly formed by a pressure casting process, without the need for additional processing steps, especially avoiding drilling on the workpiece of the pressure casting, reducing or avoiding the risk of shrinkage defect exposure.
[0049] The first oil collecting cavity 11, the second oil collecting cavity 12 and the water cavity 13 have openings towards the lower side.
[0050] As shown in Figure 1 , the bottom shell 2 can be connected to the housing body 1, and the bottom shell 2 can close the openings of the first oil collecting cavity 11, the second oil collecting cavity 12 and the water cavity 13, so that the liquid contained therein cannot leak out.
[0051] Optionally, in the axial direction of the housing, the width of the first oil collecting cavity 11 and the second oil collecting cavity 12 can be the same, and the width of the water cavity 13 can be 1 / 8 to 2 times the width of the first oil collecting cavity 11 and / or the second oil collecting cavity 12.
[0052] As shown in Figure 1 , Figure 3 and Figure 4As shown, the bottom shell 2 can be flat, and a plurality of ribs 21 can be arranged on the side of the bottom shell 2 facing the shell body 1. The ribs 21 can correspond to the end faces of the openings of the first oil collection cavity 11, the second oil collection cavity 12 and the water cavity 13. The ribs 21 are provided with through holes, and the end faces of the openings (the openings of the cavities at the bottom of the shell body 1, i.e. the openings of the first oil collection cavity 11, the second oil collection cavity 12 and the water cavity 13) are provided with threaded mounting holes. The through holes and the threaded mounting holes are coaxially arranged, and the bottom shell 2 is connected to the shell body 1 by screwing the bolts 24 through the through holes into the threaded mounting holes. When the bottom shell 2 is mounted on the shell body 1, the ribs 21 can be tightly fitted to the end faces of the openings by threaded fastening, so that the openings of the first oil collection cavity 11, the second oil collection cavity 12 and the water cavity 13 are respectively sealed, and the three cavities are independent of each other and isolated from each other and not connected to each other.
[0053] In this way, the first oil collection cavity 11 and the second oil collection cavity 12 are separated, and when the vehicle turns left or right or drives on an inclined road, the oil in the two oil collection cavities will not flow into each other, thereby alleviating or avoiding the problem of oil shortage in a single cavity. Furthermore, the independent water cavity 13 is formed by the first partition wall 14 and the second partition wall 15, so that the cooling water of the cooling controller assembly and the oil for cooling the motor and lubricating the gear are completely separated, thereby avoiding the risk of water-oil mixing caused by water leakage.
[0054] In the present embodiment, the plurality of ribs 21 are formed in a "eye" shape, and the ribs 21 include two partition wall ribs 211. The two partition wall ribs 211 respectively fit the first partition wall 14 and the second partition wall 15. The end faces of the first partition wall 14 and the second partition wall 15 are provided with threaded mounting holes, and the positions of the first partition wall 14 and the second partition wall 15 on the bottom shell 2 are provided with through holes. The bottom shell 2 is connected to the shell body 1 by screwing the bolts 24 through the through holes into the threaded mounting holes.
[0055] The three cavities of the first oil collection cavity 11, the second oil collection cavity 12 and the water cavity 13 are sealed by the bottom shell 2, which is simple in structure and easy to assemble.
[0056] Optionally, the end faces of the ribs 21 and the end faces of the openings of the first oil collection cavity 11, the second oil collection cavity 12 and the water cavity 13 can be machined to have high flatness and / or roughness, so that they can be tightly fitted and sealed after the bottom shell 2 and the shell body 1 are buckled.
[0057] The side of the bottom shell 2 facing the shell body 1 can be formed with at least one recess 22, and the recess 22 corresponds to at least one of the first oil collection cavity 11, the second oil collection cavity 12 and the water cavity 13. The volume of the collected liquid can be increased by the recess 22. The side of the bottom shell 2 away from the shell body 1 can be formed with a protrusion 23, and the position of the protrusion 23 corresponds to the recess 22.
[0058] In the above embodiment, two recesses 22 may be formed on the side of the bottom shell 2 facing the main body 1, and the two recesses 22 correspond to the first oil collecting chamber 11 and the second oil collecting chamber 12, respectively. Corresponding to the two recesses 22, two protrusions 23 may be formed on the side of the bottom shell 2 facing away from the main body 1.
[0059] Optionally, the bottom shell 2 can be formed entirely by die casting. It can be understood that after the overall die casting is completed, it can be machined as needed.
[0060] like Figure 1 and Figure 2 As shown, the housing body 1 is provided with a heat exchanger channel 16 and a controller channel 17. One end of the heat exchanger channel 16 is connected to the water cavity 13, and the other end is connected to the heat exchanger interface of the housing, and then to the heat exchanger 3; one end of the controller channel 17 is connected to the water cavity 13, and the other end is connected to the mounting cavity of the controller assembly provided in the housing. The heat exchanger channel 16 and the controller channel 17 can be respectively provided on opposite sides of the water cavity 13. The opening formed by the heat exchanger channel 16 in the water cavity 13 and the opening formed by the controller channel 17 in the water cavity 13 are respectively located on two opposite inner wall surfaces of the water cavity 13, for example, these two openings can be arranged opposite each other. Figure 2 The arrows in the diagram indicate the direction of water flow. The water flowing out of the controller assembly can flow through the controller channel 17, the water chamber 13 and the heat exchanger channel 16 in sequence to the heat exchanger 3.
[0061] It should be understood that at least some aspects or features of the above-described implementation methods, embodiments, or examples can be appropriately combined.
[0062] It is understood that, in this application, when the number of parts or components is not specifically limited, the number can be one or more, where multiple refers to two or more. For cases where the number of parts or components shown in the drawings and / or described in the specification is, for example, two, three, four, etc., this specific number is generally exemplary and not restrictive, and can be understood as multiple, i.e., two or more; however, this does not mean that this application excludes the case of one.
[0063] In the present application, unless specifically stated or limited otherwise, the terms "mounting", "assembly", "assembling", "connecting", "connection", "coupling", "joining", "abutting", "communicating", "communicate", "conducting", "fixing", "fastening" and the like shall be interpreted broadly, for example, they can be direct or indirect. For example, in terms of connection, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection via an intermediate medium; it can be internal communication of two elements, or interaction relationship between two elements, unless specifically stated or limited otherwise. For example, in terms of communication / conducting, it can be direct communication / conducting, or indirect communication / conducting via an intermediate medium. The specific meanings of the above terms in the present application can be understood by those skilled in the art according to the specific circumstances.
[0064] In the present application, unless specifically stated or limited otherwise, one member being disposed in / mounted in / located in / contained in / placed in another member, etc. can be either of the following two cases: a part or most of the one member is located in the other member; and the one member is completely contained in the other member.
[0065] Although the present application has been described in detail using the above embodiments, it is obvious to those skilled in the art that the present application is not limited to the embodiments described in the present specification. The present application can be modified and implemented as modified embodiments without departing from the spirit and scope of the present application defined by the claims. Therefore, the description in the present specification is for the purpose of illustration only, and does not have any limiting meaning on the present application.
Claims
1. A housing of a dual motor drive system, the dual motor drive system comprising two electric motors and two gear reducers, characterized by, The shell comprises: a shell body provided with a containing cavity for at least partially containing the motor and the reducer, a first oil collecting cavity and a second oil collecting cavity located at the bottom of the shell body, the first and second oil collecting cavities being in communication with the containing cavity and being separated from each other; and a bottom shell connected to the shell body, the bottom shell closing the openings of the first and second oil collecting cavities.
2. The housing of a dual electric motor drive system of claim 1, wherein, The shell body is further provided with a water cavity, a first partition wall and a second partition wall, the water cavity is located at the bottom of the shell body and is located between the first and second oil collecting cavities, the first oil collecting cavity and the water cavity being separated by the first partition wall, and the second oil collecting cavity and the water cavity being separated by the second partition wall.
3. The housing of a dual electric motor drive system of claim 2, wherein, The first oil collecting cavity, the water cavity and the second oil collecting cavity are isolated from each other and are not in communication with each other, in the axial direction of the shell, the width of the water cavity is 1 / 8 to 2 times the width of the first and / or second oil collecting cavity.
4. The housing of a dual electric motor drive system of claim 2, wherein, The shell body is provided with a heat exchanger channel and a controller channel, one end of the heat exchanger channel being in communication with the water cavity and the other end being in communication with a heat exchanger interface provided on the shell, and one end of the controller channel being in communication with the water cavity and the other end being in communication with a mounting cavity of a controller assembly provided on the shell.
5. The housing of a dual electric motor drive system of claim 4, wherein, The heat exchanger channel and the controller channel are respectively provided on the two opposite sides of the water cavity, and the openings of the heat exchanger channel and the controller channel formed in the water cavity are respectively located on the opposite two inner wall surfaces of the water cavity.
6. The housing of a dual electric motor drive system of claim 2, wherein, A plurality of ribs are provided on the side of the bottom shell facing the shell body, the ribs corresponding to the edges of the openings of the cavities of the bottom of the shell body, the ribs and the end surfaces of the openings being closely fitted, The ribs include two partition wall ribs, the two partition wall ribs being respectively fitted with the first partition wall and the second partition wall, The ribs are provided with through holes, the end surfaces of the openings are provided with threaded mounting holes, the through holes and the threaded mounting holes are coaxially arranged, and the bottom shell is connected to the shell body by screwing bolts through the through holes into the threaded mounting holes.
7. The housing of a dual electric motor drive system of claim 2, wherein, At least one recess is formed on the side of the bottom shell facing the shell body, the recess corresponding to at least one of the first oil collecting cavity, the second oil collecting cavity and the water cavity, A protrusion is formed on the side of the bottom shell away from the shell body, the position of the protrusion corresponding to the recess.
8. The housing of a dual electric motor drive system of claim 1, wherein, The shell is a metal die-cast shell.
9. A dual electric motor drive system characterized by, The shell comprises two motors and two reducers.
10. The dual electric motor drive system of claim 9, wherein, In the axial direction of the shell, the first reducer, the first motor, the second motor and the second reducer are arranged in sequence, The first oil collecting cavity is in communication with the cavity of the shell for mounting the first reducer and the first motor, for storing oil for cooling the first reducer and the first motor. The second oil storage cavity is communicated with a cavity of the housing in which the second reducer and the second motor are mounted, and is used for storing oil liquid for cooling the second reducer and the second motor. The double-motor drive system further comprises two heat exchangers and two controller assemblies, the water cavity is connected with the two heat exchangers, and is used for cooling the two controller assemblies.