Electric drive assembly and new energy automobile

Abstract

The utility model discloses an electric drive assembly and a new energy automobile, the electric drive assembly comprises a stator assembly, a gear set, a motor shell, an oil pump and a lubricating oil cooler, a first cavity for accommodating the stator assembly and a second cavity for accommodating the gear set are arranged in the motor shell, a first oil duct and a second oil duct are formed in the motor shell, and the first oil duct and the second oil duct are communicated with each other. The first oil channel is used for conveying lubricating oil to the first cavity, and the second oil channel is used for conveying the lubricating oil to the second cavity. The lubricating oil cooler is installed on the motor shell. Motor stator cooling oil liquid and gear set lubricating oil liquid are shared. The first oil duct and the second oil duct are formed in the motor shell, lubricating oil in the lubricating oil cooler is conveyed to the gear set and the stator assembly through the first oil duct and the second oil duct respectively, pipelines do not need to be arranged independently, devices are reduced, the overall structure devices are reduced, the weight is reduced, and then the energy consumption of the new energy automobile is reduced.

Description

Technical Field

[0001] This utility model relates to the field of drive equipment technology, and in particular to an electric drive assembly and a new energy vehicle. Background Technology

[0002] New energy vehicles include pure electric vehicles and hybrid electric vehicles, and the driving range of new energy vehicles is of paramount importance.

[0003] However, the electric drive assembly and electronic control system of traditional new energy vehicles account for a large proportion of the total vehicle weight, resulting in a large weight of new energy vehicles and consequently higher energy consumption.

[0004] Therefore, how to reduce the energy consumption of new energy vehicles is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide an electric drive assembly to reduce the energy consumption of new energy vehicles. Another purpose of this invention is to provide a new energy vehicle including the above-mentioned electric drive assembly.

[0006] The electric drive assembly provided in this application includes:

[0007] Stator assembly;

[0008] Gear set;

[0009] The motor housing has a first chamber for accommodating the stator assembly and a second chamber for accommodating the gear set. A first oil passage and a second oil passage are formed in the motor housing. The first oil passage is used to deliver lubricating oil to the first chamber, and the second oil passage is used to deliver lubricating oil to the second chamber.

[0010] An oil pump, which is mounted on the motor housing, provides power for the delivery of lubricating oil.

[0011] A lubricating oil cooler is provided, wherein the oil pump is used to deliver the lubricating oil collected at the bottom of the motor housing to the lubricating oil cooler, and the lubricating oil is delivered to the first oil passage and the second oil passage of the motor housing after passing through the lubricating oil cooler, and the lubricating oil cooler is installed on the motor housing.

[0012] Optionally, the electric drive assembly described above also includes a lubricating oil pipe assembly and a reducer housing, wherein the lubricating oil pipe assembly is installed in the inner cavity of the motor housing and the reducer housing.

[0013] Optionally, in the above-mentioned electric drive assembly, the reducer housing seals and blocks the inner cavity where the second chamber and the lubricating oil pipe assembly are located.

[0014] Optionally, in the above-mentioned electric drive assembly, both the oil pump and the lubricating oil cooler are installed outside the motor housing. The lubricating oil flowing through the stator assembly and the gear set is connected and collected at the bottom of the motor housing and delivered to the oil pump.

[0015] Optionally, in the above-mentioned electric drive assembly, the oil pump is located below the lubricating oil cooler, and the inlet end of the oil pump is connected to the outlet at the bottom of the inner cavity of the motor housing. A third oil passage is formed inside the motor housing, the outlet end of the oil pump is connected to the inlet of the third oil passage, and the outlet of the third oil passage is connected to the inlet end of the lubricating oil cooler.

[0016] Optionally, in the above-mentioned electric drive assembly, the liquid outlet of the first chamber is located at the bottom end, the liquid outlet of the second chamber is located at the bottom end, and the motor housing is provided with a connecting oil passage located at the bottom end of the first chamber and the bottom end of the second chamber. The bottom of the first chamber and the second chamber are connected to the connecting oil passage, and the connecting oil passage is connected to the oil pump through a fifth oil passage formed in the motor housing.

[0017] Optionally, in the above-described electric drive assembly, the oil collection passage is formed within the motor housing.

[0018] Optionally, in the above-mentioned electric drive assembly, a third oil passage and a fourth oil passage are formed inside the motor housing. The inlet end of the third oil passage is connected to the oil pump, and the outlet end of the third oil passage is connected to the lubricating oil cooler. The outlet end of the lubricating oil cooler is connected to the inlet ends of the first oil passage and the second oil passage respectively through the fourth oil passage.

[0019] Optionally, in the above-mentioned electric drive assembly, the motor housing is a magnesium alloy housing, a plastic housing, a carbon fiber housing, an aluminum alloy housing, or a cast iron housing.

[0020] A new energy vehicle, comprising the electric drive assembly described in any one of the above claims.

[0021] In the above technical solution, the electric drive assembly provided by this utility model includes a stator assembly, a gear set, a motor housing, and a lubricating oil cooler. The motor housing has a first chamber for accommodating the stator assembly and a second chamber for accommodating the gear set. A first oil passage and a second oil passage are formed within the motor housing. The first oil passage is used to deliver lubricating oil to the first chamber, and the second oil passage is used to deliver lubricating oil to the second chamber. The lubricating oil is delivered to the first and second oil passages of the motor housing after passing through the lubricating oil cooler, which is installed in the motor housing. The second oil passage is used to deliver lubricating oil to the second chamber. An oil pump is used to deliver the lubricating oil collected at the bottom of the motor housing to the lubricating oil cooler, which is also installed in the motor housing.

[0022] As described above, in the electric drive assembly provided in this application, both the stator assembly and the gear set are installed inside the motor housing, achieving a shared housing. The first and second oil passages are both formed on the motor housing. The lubricating oil in the lubricating oil cooler is transported to the gear set and stator assembly locations through the first and second oil passages. This eliminates the need for separate piping, reducing the number of components and overall structural components, thus reducing weight and consequently lowering the energy consumption of new energy vehicles. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 An isometric view of the electric drive assembly provided in an embodiment of this utility model;

[0025] Figure 2 A cross-sectional view of the electric drive assembly provided in an embodiment of this utility model;

[0026] Figure 3 This is an exploded view of the electric drive assembly provided in an embodiment of the present invention.

[0027] in Figure 1-3 In the middle: 1-motor housing, 2-stator assembly, 3-gear set, 4-lubricating oil pipe assembly, 5-reducer housing, 6-lubricating oil cooler, 7-oil pump. Detailed Implementation

[0028] The core of this invention is to provide an electric drive assembly to reduce the energy consumption of new energy vehicles. Another core aspect of this invention is to provide a new energy vehicle that includes the aforementioned electric drive assembly.

[0029] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0030] Please refer to Figures 1 to 3 .

[0031] In one specific embodiment, the electric drive assembly provided by this utility model includes a stator assembly 2, a gear set 3, a motor housing 1, an oil pump 7, and a lubricating oil cooler 6. The motor housing 1 can be a cast iron housing. The oil pump 7 is installed on the motor housing 1 to provide power for the delivery of lubricating oil. To meet the requirements of lightweighting or cost reduction of the electric drive assembly, the motor housing 1 can be a magnesium alloy housing, a plastic housing, a carbon fiber housing, or an aluminum alloy housing, etc. Specifically, the material of the motor housing 1 can be high-strength non-metallic materials such as high-strength plastics and carbon fiber.

[0032] The motor housing 1 has a first chamber for accommodating the stator assembly 2 and a second chamber for accommodating the gear set 3. Specifically, the first chamber and the second chamber can be separated by a partition disposed in the motor housing 1. In order to improve assembly efficiency, the partition and the motor housing 1 are preferably integrally formed.

[0033] A first oil passage and a second oil passage are formed inside the motor housing 1. The first oil passage is used to deliver lubricating oil to the first chamber, and the second oil passage is used to deliver lubricating oil to the second chamber. The positions and dimensions of the first and second oil passages are determined according to the positions of the first and second chambers. Specifically, the oil pump 7 is used to deliver the lubricating oil collected at the bottom of the motor housing 1 to the lubricating oil cooler 6.

[0034] The lubricating oil cooler 6 is installed on the motor housing 1, and the lubricating oil cooler 6 connects the first oil passage and the second oil passage. Specifically, the lubricating oil is delivered to the first oil passage and the second oil passage of the motor housing 1 after passing through the lubricating oil cooler 6.

[0035] During assembly, the stator assembly 2 is connected to the motor housing 1 via interference fit, spline, or bolts. Of course, the connection between the stator assembly 2 and the motor housing 1 is not limited to interference fit or bolts; other methods can also be used.

[0036] The lubricating oil is not limited to the case of heat exchange through the lubricating oil cooler 6; it can also dissipate heat through other cooling media to meet the cooling requirements of the electric drive assembly.

[0037] In one specific embodiment, the electric drive assembly further includes a lubricating oil pipe assembly 4 and a reducer housing 5. The lubricating oil pipe assembly 4 connects to the second oil passage and the second chamber, and is located within the cavities of the motor housing 1 and the reducer housing 5. The lubricating oil pipe assembly 4 is located downstream of the second oil passage. The location of the lubricating oil pipe assembly 4 depends on the position of the second oil passage and the second chamber, and is not specifically limited in this application.

[0038] In one specific embodiment, the reducer housing 5 seals the inner cavity containing the second chamber and the lubricating oil pipe assembly 4. Specifically, the reducer housing 5 seals the end of the motor housing 1. Specifically, a sealing gasket or sealant is used at the connection point between the two to improve the sealing performance of the inner cavity of the motor housing 1, thereby preventing lubricating oil leakage.

[0039] In one specific embodiment, both the oil pump 7 and the lubricating oil cooler 6 are installed outside the motor housing 1. The oil pump 7 is connected to the lubricating oil cooler 6 to provide power for lubricating oil delivery. The lubricating oil flowing through the motor stator 2 and gear set 3 is collected at the bottom of the motor housing 1 and then delivered to the oil pump 7. By installing both the oil pump 7 and the lubricating oil cooler 6 outside the motor housing 1, the flow path of the lubricating oil is reduced. By setting the oil pump 7, rapid flow of the lubricating oil is achieved, thereby improving heat exchange efficiency.

[0040] The oil pump 7 is located below the lubricating oil cooler 6, and the inlet end of the oil pump 7 is connected to the outlet at the bottom of the inner cavity of the motor housing 1.

[0041] A third oil passage is formed inside the motor. The outlet of the oil pump 7 is connected to the inlet of the third oil passage, and the outlet of the third oil passage is connected to the inlet of the lubricating oil cooler 6. By setting the outlet at the bottom of the inner cavity of the motor housing 1, it is convenient for the high-temperature lubricating oil after heat exchange inside the inner cavity of the motor housing 1 to be discharged in a timely manner. The oil passage inside the motor housing 1 can be connected to the oil pump 7, the lubricating oil cooler 6, or lubricating oil pipes by internal metal or non-metal pipes.

[0042] Specifically, the outlet of the first chamber is located at the bottom, the outlet of the second chamber is located at the bottom, and the motor housing 1 is provided with a connecting oil collection channel located at the bottom of the first chamber and the bottom of the second chamber. The bottom of the first chamber and the second chamber are connected to the connecting oil collection channel, so that the lubricating oil in the motor housing 1 can flow to the connecting oil collection channel and be discharged under its own gravity. The connecting oil collection channel is connected to the oil pump 7 through the fifth oil passage formed in the motor housing 1.

[0043] To reduce the number of pipes inside the motor housing 1, it is preferable that the oil collection channel is formed inside the motor housing 1, that is, the motor housing 1 forms the oil collection channel, and no additional pipes are required.

[0044] A fourth oil passage is formed inside the motor housing 1. The outlet of the lubricating oil cooler 6 is connected to the inlet of the first oil passage through the fourth oil passage. At the same time, the outlet of the lubricating oil cooler 6 is connected to the inlet of the second oil passage through the fourth oil passage. This arrangement ensures that the lubricating oil for cooling the stator assembly 2 and the lubricating oil for the gear set 3 share a section of oil passage, which facilitates connection with the oil pump 7 and further reduces the overall size of the oil passage.

[0045] During the operation of the electric drive assembly, the high-temperature lubricating oil generated by the heat generated by the stator assembly 2 accumulates in the oil collection area (inner cavity) of the motor housing 1. Then, due to the working pressure generated by the oil pump 7, the high-temperature lubricating oil enters the lubricating oil cooler 6 through the collecting oil passage, the fifth oil passage, the oil pump 7, and the third oil passage inside the motor housing 1. In the lubricating oil cooler 6, it exchanges heat with the low-temperature cooling water to become low-temperature lubricating oil. Under the action of the oil pump 7, the low-temperature lubricating oil is simultaneously distributed to the cooling oil circuit of the lubricating oil pipe assembly 4 and the stator assembly 2 through the fourth oil passage, the first oil passage, and the second oil passage inside the motor housing 1. The lubricating oil in the lubricating oil pipe assembly 4 meets the lubrication requirements of the gear set 3, achieving the requirement of simultaneously lubricating the gear set 3 and cooling the stator assembly 2.

[0046] When the electric drive assembly provided in this application uses a magnesium alloy housing as the motor housing 1, it meets the cooling requirements of the stator assembly 2 and reduces the temperature of the magnesium alloy motor housing 1, while also meeting the lubrication requirements of the gear set 3. This allows for the sharing of lubricating oil between the motor and the gear set 3, reduces the weight of the electric drive assembly, lowers the energy consumption of new energy vehicles, and solves the problem of high-temperature creep of the magnesium alloy housing.

[0047] In the electric drive assembly provided in the specific embodiments of this application, the lubricating oil cooler 6 is installed in the motor housing 1. The lubricating oil flowing through the stator assembly 2 and gear set 3 is connected and collected at the bottom of the motor housing 1, and then sent to the lubricating oil cooler 6 through the corresponding oil passage via the oil pump 7 for cooling through heat exchange. The stator assembly 2 and gear set 3 are both installed inside the motor housing 1, achieving a shared housing, and the cooling oil of the stator assembly 2 and the lubricating oil of the gear set 3 are shared. The first oil passage and the second oil passage are both formed by the motor housing 1. The lubricating oil in the lubricating oil cooler 6 is transported to the gear set 3 and stator assembly 2 through the first oil passage and the second oil passage, eliminating the need for separate pipelines, reducing components, reducing the overall structure components, reducing weight, and thus reducing the energy consumption of new energy vehicles.

[0048] This application provides a new energy vehicle, including any of the aforementioned electric drive assemblies. The specific structure of the electric drive assembly has been described above; this application includes the aforementioned electric drive assembly and also possesses the aforementioned technical effects.

[0049] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0050] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An electric drive assembly, characterized by include: Stator assembly (2); Gear set (3); The motor housing (1) has a first chamber for accommodating the stator assembly (2) and a second chamber for accommodating the gear set (3). The motor housing (1) has a first oil passage and a second oil passage. The first oil passage is used to deliver lubricating oil to the first chamber, and the second oil passage is used to deliver lubricating oil to the second chamber. An oil pump (7) is mounted on the motor housing (1) to provide power for the delivery of lubricating oil. The lubricating oil cooler (6) is provided. The oil pump (7) is used to send the lubricating oil collected at the bottom of the motor housing (1) to the lubricating oil cooler (6). After passing through the lubricating oil cooler (6), the lubricating oil is delivered to the first oil passage and the second oil passage of the motor housing (1). The lubricating oil cooler (6) is installed on the motor housing (1).

2. The electric drive assembly of claim 1, wherein, It also includes a lubricating oil pipe assembly (4) and a reducer housing (5), wherein the lubricating oil pipe assembly (4) is installed in the inner cavity of the motor housing (1) and the reducer housing (5).

3. The electric drive assembly of claim 2, wherein, The reducer housing (5) seals and blocks the inner cavity where the second chamber and the lubricating oil pipe assembly (4) are located.

4. The electric drive assembly of claim 1, wherein, The oil pump (7) and the lubricating oil cooler (6) are both installed outside the motor housing (1). The lubricating oil flowing through the stator assembly (2) and the gear set (3) is connected and collected at the bottom of the motor housing (1) and delivered to the oil pump (7).

5. The electric drive assembly of claim 4, wherein, The oil pump (7) is located below the lubricating oil cooler (6), and the inlet end of the oil pump (7) is connected to the outlet at the bottom of the inner cavity of the motor housing (1). A third oil passage is formed inside the motor housing (1). The outlet end of the oil pump (7) is connected to the inlet of the third oil passage, and the outlet of the third oil passage is connected to the inlet end of the lubricating oil cooler (6).

6. The electric drive assembly of claim 4, wherein, The liquid outlet of the first chamber is located at the bottom end, the liquid outlet of the second chamber is located at the bottom end, and the motor housing (1) is provided with a collecting oil passage located at the bottom end of the first chamber and the bottom end of the second chamber. The bottom of the first chamber and the second chamber are connected to the collecting oil passage. The collecting oil passage is connected to the oil pump (7) through a fifth oil passage formed in the motor housing (1).

7. The electric drive assembly of claim 6, wherein, The oil collection channel is formed inside the motor housing (1).

8. The electric drive assembly of claim 1, wherein, The motor housing (1) forms a third oil passage and a fourth oil passage. The inlet end of the third oil passage is connected to the oil pump (7), and the outlet end of the third oil passage is connected to the lubricating oil cooler (6). The outlet end of the lubricating oil cooler (6) is connected to the inlet ends of the first oil passage and the second oil passage respectively through the fourth oil passage.

9. The electric drive assembly of any one of claims 1-8, wherein, The motor housing (1) is a magnesium alloy housing, a plastic housing, a carbon fiber housing, an aluminum alloy housing, or a cast iron housing.

10. A new energy vehicle, characterized in that, Includes the electric drive assembly as described in any one of claims 1-9.

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