Vehicle and motor driving system thereof

Abstract

The invention relates to the technical field of motor driving of vehicles, particularly provides a vehicle and a motor driving system thereof, and aims to reduce the size of a dual-motor driving system on the premise of not reducing the performance of the dual-motor driving system. To this end, the motor driving system of the vehicle according to the present invention comprises: a motor assembly; the motor assembly can be connected with wheels of the vehicle through the speed reducing mechanism assembly; wherein the speed reducing mechanism assembly comprises at least one stage of transmission mechanism, and the at least one stage of transmission mechanism comprises a chain transmission mechanism. By means of the structure, the axial size and the center distance size of the motor driving system can be reduced at the same time on the premise that the performance is guaranteed through the chain transmission mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of motor drive, and specifically provides a vehicle and a motor drive system thereof. Background Art

[0002] Take electric vehicles among new energy vehicles as an example. They use motors as their power source. Specifically, they use power batteries (storage batteries) as their power source. By providing electrical energy to the motors, the motors provide the torque required for the vehicle to travel. Wheel-side motors that configure motors close to the wheels are a typical motor configuration method, while dual-motor drive systems that arrange separate motors for each wheel to achieve separate torque and vector control for a single drive wheel are typical configuration methods for wheel-side motors.

[0003] Taking the dual-motor drive system as an example, the dual-motor drive system currently generally has the problem of occupying a large space. Taking the more common back-to-back structure as an example, the two motors are arranged in series, the two sets of reduction mechanism assemblies corresponding to the two motors are arranged back-to-back, and the reduction mechanism assembly adopts a gear transmission mechanism. All these structural forms will lead to a large axial size of the dual-motor drive system. Especially for the whole vehicle that pursues high performance and high torque, the dual-motor drive system has a more obvious problem of difficult size compression. Under this premise, there may even be a processing method that has to sacrifice the acceleration, maximum output capacity and other performance of the whole vehicle because the whole vehicle cannot meet the layout space of the dual-motor drive system. Therefore, how to compress the size of the dual-motor drive system without reducing its performance has become a problem that needs to be solved urgently. In fact, it is also one of the hot issues in the current research on the dual-motor drive system. Summary of the invention

[0004] In order to at least partially solve the above technical problems, in a first aspect, the present invention provides a motor drive system for a vehicle, which motor drive system includes: a motor assembly; and a reduction mechanism assembly, wherein the motor assembly can be connected to the wheels of the vehicle through the reduction mechanism assembly; wherein the reduction mechanism assembly includes at least one transmission mechanism, and the at least one transmission mechanism includes a chain transmission mechanism.

[0005] With such a configuration, it is possible to reduce the axial dimension and center distance dimension of the motor drive system while ensuring performance through the chain transmission mechanism.

[0006] It is understandable that those skilled in the art can determine the number of transmission mechanisms included in the speed reduction mechanism assembly and the number of corresponding chain transmission mechanisms according to actual needs. Exemplarily, the number of transmission mechanisms includes three levels, and the chain transmission mechanism is a two-level transmission mechanism.

[0007] For the above motor drive system, in a possible implementation manner, the reduction mechanism assembly includes a primary transmission mechanism, and the primary transmission mechanism is the chain transmission mechanism.

[0008] Through such a configuration, it is possible to effectively reduce the high-order howling noise generated by the motor drive system by specifically configuring the speed reduction mechanism assembly through the chain transmission mechanism.

[0009] It can be understood that, in the case where the reduction mechanism assembly includes a multi-stage transmission mechanism, the transmission mechanisms of other stages can also be configured as chain transmission mechanisms.

[0010] For the above motor drive system, in a possible implementation manner, the reduction mechanism assembly includes a multi-stage transmission mechanism, and the last stage of the multi-stage transmission mechanism is a planetary gear transmission mechanism.

[0011] Through such a structure, it is possible to achieve an integrated setting of the reduction mechanism assembly to a certain extent, so that the motor drive system including the reduction mechanism assembly occupies more space.

[0012] For the above motor drive system, in a possible implementation manner, the planetary gear transmission mechanism is a primary planetary gear transmission mechanism.

[0013] With such a configuration, it is possible to reduce the axial space of the motor drive system.

[0014] For the above motor drive system, in a possible implementation manner, the vehicle includes a disengagement mechanism disposed between the motor drive system and the wheel.

[0015] Wherein, the disengagement mechanism is an integrated structure; and / or

[0016] The disengagement mechanism is integrated with the speed reduction mechanism assembly.

[0017] Through such a configuration, it is possible to achieve an integrated setting of the speed reduction mechanism assembly to a certain extent, so that the motor drive system including the speed reduction mechanism assembly occupies more space. The integrated structure of the integrated design can be a commercially available structure or a structure designed by a person skilled in the art according to actual needs.

[0018] For the above motor drive system, in a possible implementation manner, the disengagement mechanism is integrated on the planet carrier of the planetary gear transmission mechanism.

[0019] Through such a configuration, a possible way of integrating the disengaging mechanism into the speed reduction mechanism assembly is provided, for example, the corresponding integration can be achieved by means of fasteners or by using a connection method such as a snap connection.

[0020] For the above-mentioned motor drive system, in a possible implementation, the motor drive system includes a housing assembly and an oil cooling system assembly, the oil cooling system assembly includes an oil channel assembly, and at least a portion of the oil channel assembly is integrated inside the housing assembly.

[0021] With such a structure, under the premise of integrated setting, the risk of oil channel leakage is reduced because there are fewer oil channels leaking out.

[0022] For the above-mentioned motor drive system, in a possible implementation, the motor drive system includes a housing assembly and an oil cooling system assembly, the oil cooling system assembly includes a filter component, the housing assembly constructs a receiving space, and the filter component is received in the receiving space.

[0023] With such a configuration, it is possible to improve the degree of integration of the motor drive system.

[0024] It is understandable that the accommodation space can be constructed by the housing assembly alone, or by the housing assembly and other components together. For example, the other components can be existing components of the motor drive system or newly added components for constructing the accommodation space. Taking the newly added components as an example, those skilled in the art can determine the structural form, number, relative position between the components and the housing assembly, and the specific form of the accommodation space constructed by the components and the housing assembly according to actual needs.

[0025] For the above motor drive system, in a possible implementation manner, the motor drive system includes a filter press, and the filter component is the filter press without an outer cover.

[0026] With such a structure, it is possible to omit the installation process of the filter press and only need to place the filter element in the accommodation space, thereby simplifying the installation process.

[0027] For the above motor drive system, in a possible implementation manner, the motor drive system includes an intermediate housing, and the intermediate housing is disposed in the housing assembly and thus constructs the accommodating space.

[0028] Such a configuration provides a possible construction method of the accommodation space.

[0029] It is understandable that those skilled in the art can determine the structural form of the intermediate housing, and the specific form, position and number of the accommodating spaces constructed between the intermediate housing and the housing assembly according to actual needs.

[0030] For the above motor drive system, in a possible implementation manner, the motor drive system includes a housing assembly and an oil cooling system assembly, and the oil cooling system assembly includes an oil pump assembly and / or a cooler assembly.

[0031] The oil pump assembly and / or the cooler assembly are arranged on the housing assembly.

[0032] Through such a configuration, a possible form of the oil cooling system assembly constituting the motor drive system is provided.

[0033] It is understandable that those skilled in the art can determine the location and corresponding method of setting the oil pump assembly / cooler assembly on the housing assembly according to actual needs, such as fixing it on the housing assembly by screwing, clamping, welding, etc.

[0034] For the above-mentioned motor drive system, in a possible implementation, the motor assembly includes a motor shaft, and the motor shaft is configured with an axial current diversion structure, wherein the axial current diversion structure includes a conductive ring and a junction box, and the motor shaft can be electrically connected to the junction box via the conductive ring.

[0035] With such a configuration, it is possible to effectively prevent the problem of electrical corrosion on the motor assembly.

[0036] For the above motor drive system, in a possible implementation manner, the junction box includes a cover body, and the conductive ring is disposed on the cover body in an interference fit manner.

[0037] With such a configuration, it is possible to ensure the reliability of mounting the conductive ring.

[0038] For the above-mentioned motor drive system, in a possible implementation manner, the motor shaft is a hollow shaft, a plug is arranged inside the hollow shaft, the plug, the hollow shaft and the junction box construct an axis current drainage area, and the conductive ring is arranged in the axis current drainage area.

[0039] With such a configuration, it is possible to prevent oil from entering the shaft current drainage area and thus ensure the reliability of the shaft current drainage.

[0040] For the above motor drive system, in a possible implementation manner, the hollow shaft is provided with an oil drain structure at a position corresponding to the shaft current diversion area.

[0041] With such a structure, it is possible to throw out the oil that has entered the shaft current drainage area as the motor shaft rotates at high speed. For example, the oil leakage structure may be a hole, a groove, or the like.

[0042] For the above motor drive system, in a possible implementation manner, the motor drive system is a dual-motor drive system.

[0043] In a second aspect, the present invention provides a vehicle, comprising the motor drive system of any one of the above-mentioned vehicles.

[0044] It can be understood that the vehicle has all the technical effects of the motor drive system of the aforementioned vehicle, which will not be repeated here.

[0045] Proposal 1. A motor drive system for a vehicle, characterized in that the motor drive system comprises:

[0046] Motor assembly; and

[0047] A reduction mechanism assembly, wherein the motor assembly can be connected to the wheels of the vehicle through the reduction mechanism assembly;

[0048] Wherein, the deceleration mechanism assembly includes at least one transmission mechanism, and the at least one transmission mechanism includes a chain transmission mechanism.

[0049] Proposal 2. The motor drive system according to Proposal 1 is characterized in that the reduction mechanism assembly includes a primary transmission mechanism, and the primary transmission mechanism is the chain transmission mechanism.

[0050] Proposal 3. The motor drive system according to Proposal 1 is characterized in that the reduction mechanism assembly includes a multi-stage transmission mechanism, and the last stage of the multi-stage transmission mechanism is a planetary gear transmission mechanism.

[0051] Proposal 4. The motor drive system according to Proposal 3 is characterized in that the planetary gear transmission mechanism is a single-stage planetary gear transmission mechanism.

[0052] Proposal 5. The motor drive system according to Proposal 3, wherein the vehicle includes a disengagement mechanism provided between the motor drive system and the wheel,

[0053] Wherein, the disengagement mechanism is an integrated structure; and / or

[0054] The disengagement mechanism is integrated with the speed reduction mechanism assembly.

[0055] Proposal 6. The motor drive system according to Proposal 5 is characterized in that the disengagement mechanism is integrated on the planetary carrier of the planetary gear transmission mechanism.

[0056] Proposal 7. The motor drive system according to any one of Proposals 1 to 6 is characterized in that the motor drive system includes a housing assembly and an oil cooling system assembly, the oil cooling system assembly includes an oil channel assembly, and at least a portion of the oil channel assembly is integrated inside the housing assembly.

[0057] Proposal 8. The motor drive system according to any one of Proposals 1 to 6 is characterized in that the motor drive system includes a housing assembly and an oil cooling system assembly, the oil cooling system assembly includes a filter component, the housing assembly constructs a accommodating space, and the filter component is accommodated in the accommodating space.

[0058] Proposal 9. The motor drive system according to Proposal 8 is characterized in that the motor drive system includes a filter press, and the filter element is the filter press without an outer cover.

[0059] Proposal 10. The motor drive system according to Proposal 8 is characterized in that the motor drive system includes an intermediate housing, which is arranged in the housing assembly and thus constructs the accommodating space.

[0060] Proposal 11. The motor drive system according to any one of Proposals 1 to 6, characterized in that the motor drive system comprises a housing assembly and an oil cooling system assembly, wherein the oil cooling system assembly comprises an oil pump assembly and / or a cooler assembly,

[0061] The oil pump assembly and / or the cooler assembly are arranged on the housing assembly.

[0062] Proposal 12. The motor drive system according to Proposal 1, characterized in that the motor assembly includes a motor shaft, and the motor shaft is provided with a shaft current diversion structure,

[0063] Wherein, the shaft current diversion structure includes a conductive ring and a junction box, and the motor shaft can be electrically connected to the junction box via the conductive ring.

[0064] Proposal 13. The motor drive system according to Proposal 12 is characterized in that the junction box includes a cover body, and the conductive ring is arranged on the cover body in an interference fit manner.

[0065] Proposal 14. The motor drive system according to Proposal 12 is characterized in that the motor shaft is a hollow shaft, a plug is arranged inside the hollow shaft, the plug, the hollow shaft and the junction box constitute an axis current drainage area, and the conductive ring is arranged in the axis current drainage area.

[0066] Proposal 15. The motor drive system according to Proposal 14 is characterized in that the hollow shaft is provided with an oil drain structure at a position corresponding to the shaft current diversion area.

[0067] Proposal 16. The motor drive system according to Proposal 1 is characterized in that the motor drive system is a dual-motor drive system.

[0068] Proposal 17. A vehicle, characterized in that the vehicle includes the motor drive system of the vehicle according to any one of Proposals 1 to 16. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] The preferred embodiment of the present invention is described below by taking the reduction mechanism assembly including a two-stage transmission mechanism as an example and referring to the accompanying drawings, in which:

[0070] Figure 1 A schematic diagram showing the structure of a dual-motor drive system for a vehicle according to an embodiment of the present invention Figure 1 ,The figure shows the principle of the dual-motor drive system;

[0071] Figure 2 A schematic diagram showing the structure of a dual-motor drive system for a vehicle according to an embodiment of the present invention Figure 2 , the figure shows the power transmission components;

[0072] Figure 3 A schematic diagram showing the structure of a dual-motor drive system for a vehicle according to an embodiment of the present invention Figure 3 , the figure shows the connection relationship between the components in the form of an axonometric diagram;

[0073] Figure 4 A schematic diagram showing an integration method of a pressure filter in a hydraulic system of a dual-motor drive system of a vehicle according to an embodiment of the present invention; and

[0074] Figure 5 A schematic structural diagram showing a shaft current diversion structure in a dual-motor drive system of a vehicle according to an embodiment of the present invention.

[0075] List of reference numerals:

[0076] 100. Dual motor drive system;

[0077] 1. Motor assembly; 11. Motor end cover; 12. Stator; 13. Motor shaft;

[0078] 2. Rotary transformer assembly;

[0079] 3. Speed ​​reduction mechanism assembly; 31. Chain transmission mechanism; 311. Chain; 312. Sprocket; 32. Planetary gear transmission mechanism;

[0080] 4. Disengagement mechanism;

[0081] 5. Shell assembly; 51. Intermediate shell;

[0082] 6. PEU assembly;

[0083] 7. Oil cooling system assembly;

[0084] 72. Filter paper; 73. Oil pump assembly; 74. Cooler assembly;

[0085] 8. Accommodation space;

[0086] 9. Shaft current drainage structure;

[0087] 91. Conductive ring; 92. Junction box (EM junction box); 921. Box cover; 93. Plug; 94. Shaft current drainage area; 95. Oil drain groove;

[0088] 200. Wheel. DETAILED DESCRIPTION

[0089] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0090] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0091] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0092] In addition, in order to better illustrate the present invention, many specific details are given in the following specific embodiments. Those skilled in the art should understand that the present invention can also be implemented without certain specific details. In some examples, the principles of the disconnection mechanism, shaft current drainage, etc., which are well known to those skilled in the art, are not described in detail in order to highlight the main purpose of the present invention.

[0093] Main reference Figure 1 and Figure 2In a possible implementation, the dual-motor drive system 100 mainly includes two sets of subsystem assemblies corresponding to two coaxial wheels 200. Taking the subsystem assembly corresponding to the left wheel as an example, it mainly includes a motor assembly 1, a rotary transformer assembly 2 configured on the power input side of the motor assembly 1, and a speed reduction mechanism assembly 3 connected to the power output shaft of the motor assembly 1, wherein the speed reduction mechanism assembly includes a chain transmission mechanism 31 as a primary transmission mechanism and a planetary gear transmission mechanism 32 as a secondary transmission mechanism. The planetary gear transmission mechanism 32 is connected to the left wheel through a disengagement mechanism 4. The rotary transformer assembly is mainly used to convert the electric energy corresponding to the power battery into the mechanical energy output by the motor assembly through rotational motion, and the speed reduction mechanism assembly is mainly used to transmit the torque from the motor to the wheel according to the set transmission ratio. The disengagement mechanism can realize the disengagement of the half-axle of the wheel, thereby effectively reducing the loss caused by the wheel back-dragging the motor assembly, and thus it is expected to increase the vehicle's cruising range.

[0094] In the dual-motor drive system of the present invention, since the chain drive mechanism 31 is used as a primary transmission mechanism to constitute the speed reduction mechanism assembly of the dual-motor drive system, the risk of high-frequency howling caused by high-speed transmission can be effectively reduced. Moreover, unlike the gear transmission mechanism, the center distance and transmission ratio corresponding to the primary transmission mechanism can be fine-tuned by replacing the sprocket of the chain drive mechanism. In this way, it is expected that the dual-motor drive system can achieve different torque / speed output capabilities without changing the boundaries of the existing floor space.

[0095] In a possible implementation, the planetary gear transmission mechanism 32 adopts a primary planetary structure, and such a configuration can effectively reduce the axial space of the dual-motor drive system. In addition, since the sprocket and the planetary gear transmission mechanism can be assembled in the external space before further installation as a reduction mechanism assembly of the dual-motor drive system is completed, it is expected to simplify the assembly process of the reduction mechanism assembly 3.

[0096] In a possible implementation, an integrated structural disengagement mechanism with an integrated design can be used to increase the product integration of the dual-motor drive system, thereby being able to reduce the Y-direction (the width direction of the vehicle) space of the dual-motor drive system to a certain extent. On this basis, the Y-direction space of the dual-motor drive system is further reduced by integrating the disengagement mechanism with the planetary gear transmission mechanism 32 to a certain extent. Exemplarily, the disengagement mechanism is connected to the planet carrier of the planetary gear transmission mechanism 32 via a spline.

[0097] Main reference Figure 3 and Figure 4In a possible implementation, the dual-motor drive system 100 includes a housing assembly 5, wherein the motor housings and motor end covers 11 of the two motor assemblies 1 are both included in the housing assembly 5, and the dual-motor drive system 100 further includes an integrated control system (PEU) assembly 6 and an oil cooling system assembly 7. At least a portion of the oil cooling system assembly may be integrated and disposed in the housing assembly 5, thereby achieving compactness of the product based on the integrated design.

[0098] In a possible embodiment, the oil cooling system assembly 7 includes an oil passage assembly (not shown) that allows oil to circulate to achieve cooling, a filter press that can filter the oil, an oil pump assembly 73, and a cooler assembly 74. In this example, the oil passage assembly can be designed to be integrated and placed in a housing assembly, and the filter press can be integrated into the interior of the housing assembly. In addition, the oil pump assembly 73 and the cooler assembly 74 can be fixed to the housing assembly of the dual-motor drive system. In addition, the aforementioned PEU assembly 6 is also fixed to the housing assembly of the dual-motor drive system to expand design and development. For example, the components can be fixed to the corresponding positions of the housing assembly with the aid of fasteners such as bolts.

[0099] In a possible implementation, the filter press is integrated into the housing assembly in the following manner: the filter press includes a filter member such as filter paper 72, and a storage space that can reliably and stably store the filter paper can be constructed in the housing assembly 5 to achieve a built-in integrated design of the filter press. In this example, an intermediate housing 51 is added to the housing assembly, and a storage space 8 corresponding to the filter paper is constructed by the cooperation of the intermediate housing and the housing assembly.

[0100] It can be seen that in the dual-motor drive system of the present invention, by integrating the filter press inside the housing assembly of the dual-motor drive system, there is no need to configure a shell for the filter press. In this way, there is no need to arrange the assembly process of the filter press separately, but only the functional structure in the filter press - the filter paper - needs to be placed in the accommodating space (such as the accommodating hole) corresponding to the filter paper, thereby simplifying the process while integrating the structure.

[0101] In addition, when the filter is external, the oil cooling performance may be reduced or even fail if the seal is not up to standard. Compared with the external method, since there is high-pressure oil inside the shell assembly, the sealing requirements of the built-in structure are not as stringent as those of the external filter. Therefore, the built-in integrated filter can effectively reduce the probability of oil cooling performance reduction or even failure and reduce the maintenance cost of the oil cooling system assembly.

[0102] In a specific embodiment, the stator 12 of the motor assembly is interference fit with the housing assembly 5, and the manufacturing process is relatively simple and feasible. The sprocket 312 matching the chain 311 in the chain transmission mechanism 31 of the speed reduction mechanism assembly 3 is relatively positioned through tooling, and then installed into the housing assembly 5 at the same time. The oil channel assembly of the oil cooling system assembly 7 is integrated in the housing assembly, and the risk of oil channel leakage is reduced due to the small number of oil channels leaking out. Exemplarily, the integrated design of the oil channel in the housing assembly can be achieved through a die-casting process.

[0103] Main reference Figure 5 In a possible implementation, the motor shaft 13 (hollow shaft) of the motor assembly 1 is provided with an axial current diversion structure 9, which mainly includes a conductive ring 91 and a junction box 92, and the axial current from the motor shaft 13 can be conducted to the junction box 92 via the conductive ring 91.

[0104] In a possible implementation, the conductive ring 91 includes a conductive ring body and a conductive medium attached to the conductive ring body. In this example, by press-fitting the conductive ring onto the box cover 921 of the junction box 92 with an interference fit, the risk of the conductive ring falling off due to high-speed rotation of the motor shaft can be effectively reduced.

[0105] In a possible implementation manner, a plug 93 is disposed inside the motor shaft 13. Figure 5 In the orientation, the plug seals the oil in the oil cooling system assembly 7 in the left area of ​​the hollow shaft and constructs a right area (shaft current drainage area 94) for preventing electrical corrosion through the box cover 921 of the junction box 92.

[0106] By setting the plug 93, the oil of the oil cooling system assembly 7 in the left area can be effectively blocked from entering the shaft current drainage area 94 corresponding to the conductive ring 91, thereby ensuring the reliability of the shaft current drainage. On this basis, in a possible embodiment, an oil drain groove 95 as an oil drain connection structure is opened at the position of the motor shaft 13 corresponding to the shaft current drainage area 94, so that when the oil still enters the shaft current drainage area 94, the oil can be thrown out through the oil drain groove 95 by means of the high-speed rotation of the motor shaft 13, thereby effectively avoiding the phenomenon of oil entering and accumulating in the shaft current drainage area 94, and thus further improving the reliability of the shaft current drainage.

[0107] It can be seen that in the preferred embodiment of the present invention, the dual-motor drive system improves the power and torque density of the dual-motor drive system without reducing the performance of the assembly, and compresses the space size of the dual-motor drive system, thereby leaving more layout space for the whole vehicle, and is expected to better match the whole vehicle. Specifically:

[0108] 1. In the reduction mechanism assembly of the present invention, the chain transmission mechanism as a primary transmission mechanism replaces the traditional gear transmission mechanism, and thus effectively reduces the axial size of the dual-motor drive system. Moreover, compared with the gear transmission mechanism, the chain transmission mechanism has a higher transmission efficiency, so especially when it is used as a primary transmission mechanism, it can effectively reduce the high-order howling noise generated by the dual-motor drive system. For the traditional reduction mechanism assembly, if the axial size of the reduction mechanism assembly is compressed, the center distance (gear meshing pair with a large transmission ratio) or the Z-direction (height direction of the vehicle) size (matched with the outer diameter of the gear) will usually be sacrificed. The present invention can simultaneously reduce the axial size and the center distance by adopting a chain transmission mechanism, thus making the product more compact.

[0109] 2. The shaft current drainage structure of the present invention adopts a conductive ring to reduce the shaft current risk of the high-voltage platform, wherein the conductive medium of the conductive ring is arranged on the outside of the conductive ring body and installed on the cover of the junction box, which can effectively avoid the problem of the conductive ring falling off due to reasons such as high-speed driving of the vehicle and further causing the shaft current extraction failure. At the same time, by processing the oil drain hole on the motor shaft, the oil that is not blocked by the plug can be timely discharged, thereby avoiding the problem of the conductive effect of the conductive ring being affected by the oil entering the corresponding conductive ring area.

[0110] 3. The present invention uses two independent oil channel assemblies to cool and lubricate the two motor assemblies in the dual-motor drive system and the two reduction mechanism assemblies corresponding to the two motor assemblies, respectively, thereby effectively reducing the loss of the motor drive system assembly caused by high temperature. On this basis, in order to adapt to the high integration requirements of the dual-motor drive system, the present invention integrates the oil channel assembly of the oil channel assembly into the housing of the dual-motor drive system, thereby effectively reducing the product manufacturing cost of the motor drive system and optimizing the product structure. The filter press of the oil channel assembly is also integrated into the housing of the dual-motor drive system, thereby eliminating the process of installing the filter press and simplifying the assembly process. (Integrated development)

[0111] In addition, the dual-motor drive system of the present invention is often used in a four-wheel drive time-sharing vehicle platform, which can effectively reduce the product cost of the platform development of the motor drive assembly. For example, the dual-motor drive system of the present invention can adopt a common platform structure to realize the front / rear drive wheel common motor system and speed reduction mechanism assembly, and the disengagement mechanism can be configured as an option. By adaptively adjusting the control system, the platform development of the motor drive system assembly can be realized.

[0112] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A motor drive system for a vehicle, characterized in that: The motor drive system comprises: Motor assembly; and A reduction mechanism assembly, wherein the motor assembly can be connected to the wheels of the vehicle through the reduction mechanism assembly; Wherein, the deceleration mechanism assembly includes at least one transmission mechanism, and the at least one transmission mechanism includes a chain transmission mechanism.

2. The motor drive system according to claim 1, characterized in that: The speed reduction mechanism assembly includes a primary transmission mechanism, and the primary transmission mechanism is the chain transmission mechanism.

3. The motor drive system according to claim 1, characterized in that: The speed reduction mechanism assembly comprises a multi-stage transmission mechanism, and the last stage of the multi-stage transmission mechanism is a planetary gear transmission mechanism.

4. The motor drive system according to claim 3, characterized in that: The planetary gear transmission mechanism is a primary planetary gear transmission mechanism.

5. The motor drive system according to claim 3, characterized in that: The vehicle includes a disengagement mechanism disposed between the motor drive system and the wheels, Wherein, the disengagement mechanism is an integrated structure; and / or The disengagement mechanism is integrated with the speed reduction mechanism assembly.

6. The motor drive system according to claim 5, characterized in that: The disengagement mechanism is integrated on the planet carrier of the planetary gear transmission mechanism.

7. The motor drive system according to any one of claims 1 to 6, characterized in that: The motor drive system includes a housing assembly and an oil cooling system assembly. The oil cooling system assembly includes an oil passage assembly. At least a portion of the oil passage assembly is integrated inside the housing assembly.

8. The motor drive system according to any one of claims 1 to 6, characterized in that: The motor drive system includes a housing assembly and an oil cooling system assembly. The oil cooling system assembly includes a filter component. The housing assembly forms a receiving space, and the filter component is received in the receiving space.

9. The motor drive system according to claim 8, characterized in that: The motor drive system includes a filter press, and the filter component is the filter press without an outer cover.

10. The motor drive system according to claim 8, characterized in that: The motor drive system includes an intermediate housing, which is disposed in the housing assembly and thus constructs the accommodating space.

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