Driving system and vehicle

Abstract

The utility model provides a driving system and a vehicle, the driving system comprises a motor assembly, a speed reducer assembly and a cooling assembly, and the speed reducer assembly is in transmission connection with the motor assembly. The cooling assembly comprises an oil pump, a first oil pool, a second oil pool and a main oil way, the main oil way is communicated with the first oil pool and the second oil pool, the oil pump is arranged on the main oil way, and the second oil pool is communicated with the motor assembly and the speed reducer assembly. An oil cooler is arranged in the second oil pool, the oil cooler is arranged in the second oil pool in the first direction to divide the second oil pool into a first oil containing area and a second oil containing area, and a plurality of oil passing pipes are arranged between the first oil containing area and the second oil containing area. Wherein the first direction intersects with the flowing path of the cooling liquid in the second oil pool flowing to the motor assembly or the speed reducer assembly. The oil pump is arranged on the main oil way and directly communicated with the first oil pool and the second oil pool, other load assemblies are not arranged behind the oil pump, the efficiency of the electric drive assembly is improved, and the cooling effect is improved.

Description

Technical Field

[0001] The present application relates to the field of automobile drive technology, and in particular to a drive system and a vehicle. Background Art

[0002] With the development of automobile technology, the new energy automobile industry has developed rapidly. As one of the core components of new energy automobiles, the motor drive system determines the main performance indicators of automobile driving and has an important impact on the layout of the new energy automobile industry. The motor drive system for new energy automobiles has the characteristics of high speed and high power, and also has high requirements for reliability, cooling, lubrication and other aspects.

[0003] In the prior art, the electric drive cooling oil circuit is usually operated by a mechanical oil pump to transport coolant to the reducer and motor for lubrication and cooling. At the rear end of the mechanical oil pump, there are loads such as heat exchangers, reducers, motors, and complex oil circuits. Since the mechanical oil pump is driven by the reducer, the greater its load, the greater the reduction in the efficiency of the electric drive assembly. Therefore, it is necessary to improve the existing motor drive system, eliminate the rear end load of the mechanical oil pump, and improve the efficiency of the electric drive assembly. Utility Model Content

[0004] The purpose of the present application is to provide a drive system, thereby overcoming the problems of heavy load on the mechanical oil pump and low efficiency of the electric drive assembly in the drive system.

[0005] In one aspect of the present application, a drive system is provided, which includes a motor assembly, a reducer assembly and a cooling assembly, wherein the reducer assembly is drivingly connected to the motor assembly. The cooling assembly includes an oil pump, a first oil pool, a second oil pool and a main oil circuit, wherein the main oil circuit is connected to the first oil pool and the second oil pool, the oil pump is arranged on the main oil circuit, and the second oil pool is connected to the motor assembly and the reducer assembly respectively. An oil cooler is arranged in the second oil pool along a first direction to separate the second oil pool into a first oil containing area and a second oil containing area, and a plurality of oil pipes are arranged between the first oil containing area and the second oil containing area. Wherein, the first direction intersects with the flow path of the coolant in the second oil pool flowing to the motor assembly or the reducer assembly.

[0006] Furthermore, the oil cooler comprises a shell, a liquid inlet pipe and a liquid outlet pipe, a cooling channel is provided in the shell, and the liquid inlet pipe and the liquid outlet pipe are both connected to the cooling channel. Each of the oil pipes is provided in the shell and passes through opposite ends of the shell, and the axis of each of the oil pipes intersects with the extension direction of the cooling channel.

[0007] Furthermore, the extension direction of the cooling channel intersects perpendicularly with the axis of each of the oil passage pipes, and the axis of each of the oil passage pipes is parallel to the flow path.

[0008] Furthermore, the drive system further comprises two connecting oil pipes, the connecting oil pipes respectively connecting the second oil pool with the motor assembly and the second oil pool with the reducer assembly. The connecting oil pipes are each provided with an oil inlet connected with the second oil pool, the main oil circuit is provided with an oil outlet connected with the second oil pool, and the oil outlet and the oil inlet are respectively connected with opposite sides of the second oil pool. The flow path is the flow direction of the coolant in the second oil pool to the oil inlet.

[0009] Furthermore, the cooling channel, the liquid inlet pipe and the liquid outlet pipe are arranged along the same axis, and the axis of each of the oil-passing pipes intersects the axis perpendicularly.

[0010] Furthermore, the oil inlet is arranged at the bottom of the second oil pool.

[0011] Furthermore, a cooling oil circuit and an oil return circuit are provided in the motor assembly and the reducer assembly, and the cooling oil circuit and the oil return circuit are connected to the connecting oil pipe.

[0012] Furthermore, the oil return circuit is connected to the first oil pool, and the coolant lubricates and cools the motor assembly and the reducer assembly and then flows back into the first oil pool.

[0013] Furthermore, the reducer assembly further includes an output shaft, the oil pump is provided with an input shaft, the output shaft is connected to the input shaft, and the reducer assembly drives the oil pump to operate via the output shaft and the input shaft.

[0014] Furthermore, the present application also provides a vehicle, which includes the above-mentioned drive system.

[0015] A drive system of the present application has the following beneficial effects: the drive system provided by the present application includes a motor assembly, a reducer assembly and a cooling assembly, and the reducer assembly is connected to the motor assembly in a transmission manner. The cooling assembly includes an oil pump, a first oil pool, a second oil pool and a main oil circuit, the main oil circuit is connected to the first oil pool and the second oil pool, the oil pump is arranged on the main oil circuit, and the second oil pool is connected to the motor assembly and the reducer assembly respectively. An oil cooler is arranged in the second oil pool along the first direction to divide the second oil pool into a first oil storage area and a second oil storage area, and a plurality of oil pipes are arranged between the first oil storage area and the second oil storage area. Among them, the first direction intersects with the flow path of the coolant in the second oil pool flowing to the motor assembly or the reducer assembly. The oil pump is arranged on the main oil circuit to directly connect the first oil pool and the second oil pool, and no other load components are arranged behind the oil pump, thereby improving the efficiency of the electric drive assembly. Further, an oil cooler is arranged in the second oil pool, and the oil cooler is arranged along the first direction, and the first direction intersects with the coolant flow path, and is fully in contact with the coolant to improve the cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a structural schematic diagram of a drive system of the present application.

[0018] Description of reference numerals:

[0019] 1. Motor assembly; 2. Reducer assembly; 3. Cooling assembly;

[0020] 21. output shaft; 22. output gear; 31. oil pump; 32. first oil pool; 33. second oil pool; 34. main oil circuit; 35. connecting oil pipe; 36. oil inlet; 37. oil outlet;

[0021] 311. Input shaft; 312. Input gear; 331. Oil cooler; 332. First oil storage area; 333. Second oil storage area; 334. Liquid inlet pipe; 335. Liquid outlet pipe; 336. Cooling channel; 337. Oil passage pipe. DETAILED DESCRIPTION

[0022] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.

[0023] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0024] The present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limiting the present application.

[0025] It should be noted that the "multiple" mentioned in this article refers to two or more. "And / or" describes the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0026] See also Figure 1 As shown, the present application provides a driving system including a motor assembly 1, a reducer assembly 2 and a cooling assembly 3, wherein the reducer assembly 2 is in transmission connection with the motor assembly 1. The cooling assembly 3 includes an oil pump 31, a first oil pool 32, a second oil pool 33 and a main oil circuit 34, wherein the main oil circuit 34 is connected with the first oil pool 32 and the second oil pool 33, the oil pump 31 is arranged on the main oil circuit 34, and the second oil pool 33 is respectively connected with the motor assembly 1 and the reducer assembly 2. An oil cooler 331 is arranged in the second oil pool 33, and the oil cooler 331 is arranged in the second oil pool 33 along the first direction to divide the second oil pool 33 into a first oil containing area 332 and a second oil containing area 333, and a plurality of oil pipes 337 are arranged between the first oil containing area 332 and the second oil containing area 333. Among them, the first direction intersects with the flow path of the coolant in the second oil pool 33 flowing to the motor assembly 1 or the reducer assembly 2. The oil pump 31 is arranged on the main oil circuit 34 and directly connects the first oil pool 32 and the second oil pool 33. No other load components are arranged behind the oil pump 31, thereby improving the efficiency of the electric drive assembly. Furthermore, an oil cooler 331 is arranged in the second oil pool 33. The oil cooler 331 is arranged along a first direction, and the first direction intersects with the coolant flow path, so that the oil cooler 331 can fully contact with the coolant for heat exchange, thereby improving the cooling effect of the coolant on the reducer assembly 2 and the motor assembly 1.

[0027] In some embodiments, reference Figure 1 The oil cooler 331 includes a shell, a liquid inlet pipe 334 and a liquid outlet pipe 335. A cooling channel 336 is provided in the shell, and the liquid inlet pipe 334 and the liquid outlet pipe 335 are both connected to the cooling channel 336. Each oil pipe 337 is provided in the shell and passes through the opposite ends of the shell. The axis of each oil pipe 337 intersects with the extension direction of the cooling channel 336. Cooling water enters the cooling channel 336 from the liquid inlet pipe 334, and is discharged from the liquid outlet pipe 335 after heat exchange with the coolant in the oil pipe 337 in the cooling channel 336. There are a plurality of oil pipes 337, and each oil pipe 337 passes through the oil cooler 331, and is connected to the first oil storage area 332 and the second oil storage area 333. The first oil storage area 332 contains hot coolant, and the second oil storage area 333 contains cold coolant. The axis of the oil pipe 337 intersects with the axis of the cooling channel 336. When the coolant passes through the oil pipe 337, the hot coolant is fully in contact with the cooling water to be cooled and form cold coolant.

[0028] Preferably, the angle between the axis of the oil pipe 337 and the extension direction of the cooling channel 336 can be 90 degrees, 80 degrees or 60 degrees. The coolant flows from the first oil storage area 332 to the second oil storage area 333 through the oil pipe 337, and the temperature drops after passing through the cooling channel 336 in the oil cooler 331, and further flows to the reducer assembly 2 and the motor assembly 1 for cooling and lubrication, thereby improving the efficiency of the electric drive assembly and enhancing the product usage experience.

[0029] Specifically, refer to Figure 1 The extension direction of the cooling channel 336 intersects perpendicularly with the axis of each oil pipe 337, and the axis of each oil pipe 337 is parallel to the flow path. The cooling channel 336 and the axis of the oil pipe 337 intersect perpendicularly, which ensures the flow speed of the coolant. At the same time, the oil pipe 337 intersects with the cooling channel 336, and the coolant is cooled by heat exchange, thereby ensuring the cooling effect of the oil cooler 331.

[0030] Furthermore, the drive system further includes two connecting oil pipes 35, and the connecting oil pipes 35 are connected to the second oil pool 33 and the motor assembly 1 and the second oil pool 33 and the reducer assembly 2 respectively. The connecting oil pipes 35 are each provided with an oil inlet 36 connected to the second oil pool 33, and the main oil circuit 34 is provided with an oil outlet 37 connected to the second oil pool 33, and the oil outlet 37 and the oil inlet 36 are respectively connected to the opposite sides of the second oil pool 33. The flow path is the flow direction of the coolant in the second oil pool 33 to the oil inlet 36. The connecting oil pipe 35 connects the second oil pool 33 with the reducer assembly 2 and the motor assembly 1, and the coolant enters the reducer assembly 2 and the motor assembly 1 through the connecting oil pipe 35, so as to realize the cooling and lubrication of the reducer assembly 2 and the motor assembly 1, and improve the reliability of the motor. Specifically, the connecting oil pipes 35 can also be set to not only two, but also one or three, etc., and other drive components can be connected through the connecting oil pipes 35 according to actual needs to cool them and improve the efficiency of the electric drive assembly.

[0031] Preferably, the cooling channel 336, the liquid inlet pipe 334 and the liquid outlet pipe 335 are arranged along the same axis, and the axis of each oil pipe 337 intersects the axis perpendicularly. The cooling channel 336, the liquid inlet pipe 334 and the liquid outlet pipe 335 are arranged along the same axis to facilitate the inflow and outflow of cooling water. The axis of the oil pipe 337 is perpendicular to the axis of the cooling channel 336 to facilitate the inflow and outflow of coolant, and also to facilitate heat exchange between coolant and cooling water, so as to achieve cooling and lubrication of the reducer assembly 2 and the motor assembly 1.

[0032] For details, please continue to refer to Figure 1 The oil inlet 36 is arranged at the bottom of the second oil pool 33. The oil inlet 36 is arranged at the bottom of the second oil pool 33 so that the coolant can directly enter the reducer assembly 2 and the motor assembly 1 through the connecting oil pipe 35 without accumulating enough oil in the second oil pool 33, thereby avoiding waste of coolant.

[0033] In some embodiments, reference Figure 1 The motor assembly 1 and the reducer assembly 2 are both provided with a cooling oil circuit (not shown) and an oil return circuit (not shown), and the cooling oil circuit and the oil return circuit are connected to the connecting oil pipe 35. The coolant flows into the cooling oil circuit and the oil return circuit through the connecting oil pipe 35, thereby cooling the motor assembly 1 and the reducer assembly 2.

[0034] Specifically, the oil return circuit is connected to the first oil pool 32, and the coolant lubricates and cools the motor assembly 1 and the reducer assembly 2 and then flows back to the first oil pool 32. The coolant cools down through the cooling oil circuits in the motor assembly 1 and the reducer assembly 2, and then flows back to the first oil pool 32 through the oil return circuit, and the coolant is further recycled through the oil pump 31, saving energy, avoiding waste of coolant, and reducing costs.

[0035] Specifically, refer to Figure 1 The reducer assembly 2 also includes an output shaft 21, and the oil pump 31 is provided with an input shaft 311. The output shaft 21 is connected to the input shaft 311. The reducer assembly 2 drives the oil pump 31 to operate through the output shaft 21 and the input shaft 311. The reducer is provided with an output shaft 21 and an output gear 22, and the oil pump 31 is provided with an input shaft 311 and an input gear 312. The output gear 22 and the input gear 312 are meshed with each other. Through the mutual cooperation of the output shaft 21, the output gear 22, and the input shaft 311 and the input gear 312, the reducer assembly 2 drives the oil pump 31 to operate, and transports the coolant in the first oil pool 32 to the second oil pool 33 to realize the circulation of the coolant. Furthermore, the volume of the second oil pool 33 is large enough. Within a certain period of time when the oil pump 31 is not running, the coolant in the oil pump 31 is sufficient to support the lubrication and cooling of the reducer assembly 2 and the motor assembly 1, so as to prevent the reducer assembly 2 and the motor assembly 1 from overheating and causing damage when the oil pump 31 is not running, thereby improving the product use experience.

[0036] The present application also provides a vehicle, which includes the above-mentioned drive system.

[0037] In this application, unless otherwise clearly specified and limited, the terms "disposed (provided with)", "connected" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] In the description of this specification, the description of reference terms such as "some embodiments" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment are included in at least one embodiment of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0039] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present application. Therefore, any changes or modifications made according to the claims and description of the present application should fall within the scope of the present application.

Claims

1. A drive system, characterized in that: include: Motor components; A reducer assembly, the reducer assembly is drivingly connected to the motor assembly; A cooling assembly, the cooling assembly comprising an oil pump, a first oil pool, a second oil pool and a main oil circuit, the main oil circuit is connected to the first oil pool and the second oil pool, the oil pump is arranged on the main oil circuit, and the second oil pool is respectively connected to the motor assembly and the reducer assembly; An oil cooler is arranged in the second oil pool, and the oil cooler is arranged in the second oil pool along the first direction to divide the second oil pool into a first oil containing area and a second oil containing area, and a plurality of oil passing pipes are arranged between the first oil containing area and the second oil containing area; The first direction intersects with a flow path of the coolant in the second oil pool flowing toward the motor assembly or the reducer assembly.

2. The drive system according to claim 1, characterized in that: The oil cooler comprises a shell, a liquid inlet pipe and a liquid outlet pipe, a cooling channel is provided in the shell, and the liquid inlet pipe and the liquid outlet pipe are both connected to the cooling channel; Each of the oil pipes is disposed in the shell and passes through opposite ends of the shell; The axis of each of the oil passages intersects with the extension direction of the cooling channel.

3. The drive system according to claim 2, characterized in that: The extension direction of the cooling channel intersects perpendicularly with the axis of each of the oil pipes; The axis of each of the oil passage pipes is parallel to the flow path.

4. The drive system according to claim 2, characterized in that: It also includes two communicating oil pipes, the communicating oil pipes respectively connecting the second oil pool with the motor assembly and the second oil pool with the reducer assembly; The connecting oil pipes are all provided with oil inlets connected to the second oil pool; The main oil circuit is provided with an oil outlet connected to the second oil pool, and the oil outlet and the oil inlet are respectively connected to two opposite sides of the second oil pool; The flow path is the flow direction of the coolant in the second oil pool toward the oil inlet.

5. The drive system according to claim 4, characterized in that: The cooling channel, the liquid inlet pipe and the liquid outlet pipe are arranged along the same axis; The axis of each of the oil pipes intersects the axis perpendicularly.

6. The drive system according to claim 4, characterized in that: The oil inlet is arranged at the bottom of the second oil pool.

7. The drive system according to claim 4, characterized in that: A cooling oil circuit and an oil return oil circuit are provided in the motor assembly and the reducer assembly, and the cooling oil circuit and the oil return oil circuit are connected to the connecting oil pipe.

8. The drive system according to claim 7, characterized in that: The oil return oil circuit is connected to the first oil pool, and the coolant lubricates and cools the motor component and the reducer component and then flows back into the first oil pool.

9. The drive system according to any one of claims 1 to 8, characterized in that: The reducer assembly further includes an output shaft, the oil pump is provided with an input shaft, the output shaft is connected to the input shaft, and the reducer assembly drives the oil pump to operate via the output shaft and the input shaft.

10. A vehicle, characterized in that: The vehicle comprises a drive system as described in any one of claims 1-9 above.

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