Housing structure for electric drive assembly and electric drive assembly

Abstract

A housing structure for an electric drive assembly and an electric drive assembly. The housing structure includes a motor housing (1), a reducer housing (2), a controller housing (3), an oil cooling assembly, and a water cooling assembly, at least two of the motor housing, the reducer housing, and the controller housing are integrated, the oil cooling assembly includes an oil pumping unit and an oil passage, the oil passage is disposed inside the motor housing and inside the reducer housing, the oil pumping unit communicates with the oil passage and transports lubricating oil in the reducer housing to the oil passage, and the water cooling assembly includes a water passage, the water passage is a circulating water passage, and is disposed inside the controller housing and inside the motor housing, and the water passage is connected to a water cooling source of a vehicle. The housing structure has the advantages of reducing the weight of the electric drive assembly, increasing the rigidity of the electric drive assembly, and providing high cooling and lubrication efficiency.

Description

[Technical field]

[0001] The present invention relates to the technical field of electric drive assemblies, and in particular to a housing structure of an electric drive assembly and an electric drive assembly. [Background technology]

[0002] With the rapid development of the automobile manufacturing industry, the vibration noise level of the power system of new energy automobiles has become one of the important technical indicators of modern automobile manufacturing quality. The vibration noise of the electric system is mainly related to the modality of the system itself, and the modality of the system itself is related to the structure of the system, that is, the main factors that affect the vibration noise index of the electric drive system include electromagnetic design and structural design, such as the electromagnetic noise of the motor, the gear order noise and the housing modality. For new energy electric drive systems, the key to improving the vibration noise performance is how to reduce the noise level caused by various factors, and the electromagnetic high frequency noise and the gear order noise are limited by the required target performance, so the effect of reducing the noise level by the internal structure of the hardware is limited. Summary of the Invention [Problem to be solved by the invention]

[0003] SUMMARY OF THE DISCLOSURE In response to the above problems, the present invention discloses a housing structure for an electric drive assembly and an electric drive assembly to eliminate or at least partially solve the above problems. [Means for solving the problem]

[0004] In order to achieve the above object, the present invention employs the following technical solutions.

[0005] In one aspect of the present invention, there is provided a housing structure for an electric drive assembly, the housing structure including a motor housing, a reducer housing, a controller housing, an oil cooling assembly, and a water cooling assembly; At least two of the motor housing, the reducer housing, and the controller housing have an integrated structure; The oil cooling assembly includes an oil pumping unit and an oil passage, the oil passage is disposed inside the motor housing and inside the reduction gear housing, the oil pumping unit communicates with the oil passage and transports lubricating oil in the reduction gear housing to the oil passage, The water cooling assembly includes a water passage, the water passage being a circulating water passage and disposed within the controller housing and the motor housing, the water passage being connected to a water cooling source for the vehicle.

[0006] Furthermore, the motor housing, the reducer housing, and the controller housing are integrated into one structure, The controller housing is provided above the motor housing, and the reducer housing is provided on the power output side of the motor housing.

[0007] Furthermore, the oil passage includes several oil distribution passages, and the oil discharge positions of each of the oil distribution passages correspond to the parts to be cooled and lubricated in the motor housing, and the parts to be cooled and lubricated in the reducer housing, respectively.

[0008] Further, the water passage includes a first water passage provided on the bottom and / or side wall of the controller housing, and a second water passage provided between the motor housing and the motor water jacket, and the first water passage and the second water passage are connected via a connecting water passage.

[0009] Furthermore, the cooling water in the water-cooling source passes through the first water passage, the connecting water passage, and the second water passage in this order, and is returned to the water-cooling source.

[0010] Furthermore, the first water passage is formed by a water groove provided in the bottom part of the controller housing and a seal plate provided in the water groove.

[0011] Furthermore, the oil cooling assembly further includes a heat exchange unit; Both the oil passage and the water passage are in communication with the heat exchange unit, and the heat exchange unit realizes heat exchange between the lubricating oil in the oil passage and the cooling water in the water passage.

[0012] Additionally, the housing structure further includes an oil filter assembly; The oil filter assembly is provided at the bottom of the reducer housing, the oil pumping unit communicates with the reducer housing through the oil filter assembly, and the oil filter assembly is used for filtering the lubricating oil.

[0013] Further, the oil pumping unit includes an electronic oil pump and an electronic control device; The electronic oil pump is provided at the bottom of the motor housing or the reducer housing, and the electronic control device is used to control the operation of the electronic oil pump.

[0014] Another aspect of the present invention provides an electric drive assembly, which uses a housing structure as described above. Effect of the Invention

[0015] The advantages and beneficial effects of the present invention are as follows:

[0016] In the housing structure of the present invention, at least two of the motor housing, the reducer housing, and the controller housing are designed into an integrated structure, which significantly reduces the parts and weight, increases the overall rigidity, simplifies the manufacturing and assembly process, avoids mechanical connections and contact seals, and effectively improves the vibration and noise of the power assembly, thereby ensuring or improving the NVH (Noise, Vibration, Harshness) performance of the entire vehicle. In addition, by providing an oil cooling assembly and a water cooling assembly in the housing structure, cooling of the motor, reducer, and controller, and lubrication of the motor and reducer can be achieved simultaneously, thereby improving the efficiency of cooling and lubrication.

[0017] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. In addition, like reference numerals refer to like parts throughout the drawings. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a three-dimensional structural view of a housing structure according to an embodiment of the present invention at a first viewing angle. [Diagram 2] FIG. 2 is a three-dimensional structural view of the housing structure in the embodiment of the present invention at a second viewing angle. [Diagram 3] FIG. 3 is a left side view of a housing structure according to an embodiment of the present invention. [Figure 4] FIG. 4 is a front view of a housing structure in one embodiment of the present invention. [Diagram 5] FIG. 5 is a rear view of a housing structure in one embodiment of the present invention. [Figure 6] FIG. 6 is a plan view of a housing structure in one embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] In order to make the objectives, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Obviously, the described embodiments are only some embodiments of the present invention, and are not all embodiments. All other embodiments obtained by those skilled in the art without creative efforts based on the embodiments of the present invention are within the protection scope of the present invention.

[0020] It is to be understood that the terms "comprising," "consisting of," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product, apparatus, procedure, or method that includes a set of elements may include not only those elements, but also other elements not expressly listed, as appropriate, or elements inherent to such product, apparatus, procedure, or method. In the absence of further limitations, an element qualified by the phrase "comprising," "consisting of," does not exclude the presence of other identical elements in the product, apparatus, procedure, or method that includes that element.

[0021] It is further understood that the orientations or positions indicated by terms such as "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inside", "outside", etc., are based on the orientations or positions indicated in the drawings and are intended only to facilitate and simplify the description of the invention, and are not intended to indicate or suggest that the devices, components or structures referred to have a particular orientation or must be constructed or operated in a particular orientation, and should not be construed as limitations on the invention.

[0022] In this embodiment, the right is the front and the left is the rear.

[0023] In the present invention, unless otherwise expressly specified and limited, the terms "attached", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or it may be integrated. It may also be a mechanical connection or an electrical connection. It may also be directly connected, indirectly connected via an intermediate medium, or it may be an internal communication between two elements or an interactive relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present invention can be understood according to the specific situation.

[0024] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, technical solutions according to various embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0025] One embodiment of the present invention provides a housing structure for an electric drive assembly, and as shown in Figures 1 to 6, the housing structure includes a motor housing 1, a reducer housing 2, a controller housing 3, an oil cooling assembly, and a water cooling assembly. The motor housing 1 is provided with a motor cavity for accommodating a motor stator, a motor rotor, a motor shaft, etc., and the motor cavity is sealed by a motor rear cover 4. The reducer housing 2 is provided with a reducer cavity for accommodating a shaft and gears in the reducer, etc., and the reducer cavity is sealed by a reducer rear cover 5. The controller housing 3 is provided with a controller cavity for accommodating a circuit board, wiring, etc., and the controller cavity is sealed by a controller cover 6.

[0026] Specifically, the motor housing, the reducer housing, and the controller housing are cast in an integrated structure, which not only reduces the number of parts and processing steps, and avoids the need for interlocking between the housings, but also avoids the need for sealing between the housings, thereby reducing the weight of the entire electric drive assembly and realizing a lightweight design. The integrated structure of the housings can increase the overall rigidity of the housing structure, improve the modality of the housing structure, and effectively improve the vibration and noise performance of the electric drive assembly. The housing structure is easy to expand, and the length of the motor housing can be adjusted according to the actual usage situation, and the structures of the reducer housing and the controller housing can be adjusted according to different usage situations to realize different structural installations and position layouts for the motor, the reducer, and the controller.

[0027] Furthermore, the oil cooling assembly includes an oil pumping unit and an oil passage, the oil passage is disposed inside the motor housing and inside the reducer housing, the oil pumping unit is connected to the oil passage, and is used to pump the lubricating oil in the reducer housing into the oil passage, transport the lubricating oil through the oil passage to the structures in the motor housing and the reducer housing that require cooling and lubrication, and further cool and lubricate the structures in the motor housing and the reducer housing. After completing the lubrication and cooling, the lubricating oil flows to the bottom of the motor housing and the reducer housing by gravity, and since the motor housing and the reducer housing are connected to each other, the lubricating oil at the bottom of the motor housing is returned to the bottom of the reducer housing.

[0028] The water cooling assembly includes a water channel, the water channel being a circulating water channel and disposed inside the controller housing and inside the motor housing, the water channel being connected to a water cooling source of the vehicle, and further cooling the controller and the motor, whereby the water cooling source of the vehicle is the water cooling system of the vehicle itself, the cooling water in the water cooling source circulates through the controller housing and the motor housing through the water channel and then returns to the water cooling source, thereby carrying away the heat generated by the controller and the motor.

[0029] In this embodiment, by providing an oil cooling assembly and a water cooling assembly in the housing structure, cooling for the motor, reducer, and controller, and lubrication for the motor and reducer can be achieved simultaneously, thereby making it possible to more efficiently cool and lubricate the electric drive assembly.

[0030] Furthermore, because the controller is more sensitive to temperature, the controller housing 3 in this embodiment is provided above the motor housing 1, as shown in Figures 1 to 5. This makes it easy for the water-cooled assembly to complete cooling and decreasing the temperature of the controller housing 3 first, and then to cool and decrease the temperature of the motor housing 1. Furthermore, the reducer housing 2 is provided on the power output side of the motor housing 1. This design makes it possible to make the housing structure more compact.

[0031] Of course, in other embodiments of the present invention, two of the motor housing, the reducer housing, and the controller housing may have an integrated structure, which is also within the scope of protection of the invention.

[0032] In one embodiment, as shown in FIG. 5, the oil passage includes several oil distribution passages 7, and the oil distribution passages 7 may be oil pipes or oil passages. When the oil distribution passages 7 are oil passages, the oil passages can be directly cast into the motor housing and the reducer housing. The oil discharge positions of each oil distribution passage 7 correspond to the parts to be cooled and lubricated in the motor housing, and the parts to be cooled and lubricated in the reducer housing, respectively. The oil pumping unit pumps the lubricating oil in the reducer housing into the oil passage, and then conveys it to the parts to be cooled and lubricated through each oil distribution passage 7, thereby accurately realizing the cooling of the parts to be cooled and the lubrication of the parts to be lubricated, so that the cooling and lubrication efficiency is higher, and the cooling and lubrication needs when the electric drive assembly operates for a long time under various operating conditions with high power, high torque and high rotation speed are met, and the reliability of the vehicle is improved. Among them, the parts to be cooled include bearings, gears, motor coils, motor rotors, etc., and the parts to be lubricated include bearings, gears, oil seals, etc.

[0033] For example, the oil discharge position of one or more oil distribution passages corresponds to the motor coil, thereby realizing active and directional cooling of the motor coil by lubricating oil, so that the heat generated during the operation of the motor coil can be quickly carried away in real time, and premature failure of the entire vehicle due to the motor's excessively high operating temperature in special operating conditions can be avoided or reduced, and the power density and overall efficiency of the motor can be improved.

[0034] 1, 2 and 6, the water passage includes a first water passage 8 provided on the bottom and / or side wall of the controller housing, and a second water passage (not shown) provided between the motor housing and the motor water jacket, and the first water passage 8 and the second water passage are connected via a connecting water passage, so that the cooling water in the water-cooling source is returned to the water-cooling source by passing through the first water passage 8, the connecting water passage and the second water passage in sequence, and the heat in the controller housing and the motor housing is carried away. Of course, in other embodiments, the cooling water in the water-cooling source may be returned to the water-cooling source by passing through the second water passage, the connecting water passage and the first water passage in sequence.

[0035] Furthermore, the first water passage is specifically formed by a water groove provided in the bottom of the controller housing and a seal plate provided in the water groove, and the water groove is provided in a bent manner in the bottom of the controller housing, which makes it easier to control the heat dissipation at the bottom of the controller housing more uniformly. Also, a seal ring is provided between the water groove and the seal cover plate to improve sealing performance.

[0036] In one embodiment, the oil cooling assembly further includes a heat exchange unit. Both the oil passage and the water passage are connected to a heat exchange unit, which realizes heat exchange between the lubricating oil in the oil passage and the cooling water in the water passage, so that the heat in the lubricating oil is carried away by the cooling water, and further improves the heat dissipation performance of the electric drive assembly.

[0037] In one embodiment, the housing structure further includes an oil filter assembly. The oil filter assembly is provided at the bottom of the reducer housing, and the oil pumping unit is connected to the reducer housing through the oil filter assembly, and the oil filter assembly is used to filter the lubricating oil. The lubricating oil in the reducer housing may be filtered by the oil filter assembly before entering the oil pump assembly, to filter out particles in the lubricating oil. This prevents the oil distribution passage from being clogged by particles and from affecting the normal operation of the motor and the reducer. By providing the oil filter assembly at the bottom of the reducer housing, the space at the bottom of the reducer housing is fully utilized, while the lubricating oil at the bottom of the reducer housing can enter the oil filter assembly by gravity and be filtered.

[0038] Furthermore, in order to prevent the filtering effect of the oil filter assembly from decreasing due to long-term use, the oil filter assembly is a removable oil filter, and the filtering effect of the oil filter assembly is guaranteed by replacing the filter element.

[0039] In one embodiment, the oil pumping unit includes an electronic oil pump and an electronic control device. The electronic oil pump is provided at the bottom of the motor housing or the reducer housing, which can further save space effectively, and an electronic control device is used to control the operation of the electronic oil pump.

[0040] And associated with the oil pumping unit are several temperature and rotational speed sensors.

[0041] Each temperature sensor is provided in the motor housing and / or the reducer housing, and each temperature sensor transmits the detected temperature to the electronic control device, and the electronic control device controls the operation of the electronic oil pump based on the temperature detected by the temperature sensor. For example, the temperature sensor is provided in the motor coil and is used to detect the temperature of the motor coil, and when the temperature of the motor coil reaches a predetermined value, the electronic control device controls the electronic oil pump to operate and pumps lubricating oil into the motor coil, thereby realizing a temperature drop of the motor coil.

[0042] The rotational speed sensor is used to detect the rotational speed of the motor or reducer and transmit the detected rotational speed to the electronic control device, and the electronic control device controls the operation of the electronic oil pump based on the rotational speed of the motor or reducer, i.e., when the rotational speed of the motor or reducer is higher than a preset value, the electronic control device controls the electronic oil pump to operate, and cooling and lubrication for the electric drive assembly is realized.

[0043] In another embodiment of the present invention, an electric drive assembly is disclosed, which uses the housing structure in any one of the above embodiments, and the electric drive assembly has the advantages of good cooling and lubrication performance and NVH performance, and can achieve high torque and high rotational speed output.

[0044] The above is merely an embodiment of the present invention, and does not limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, extensions, etc. made within the spirit and principle of the present invention shall be included within the scope of protection of the present invention. [Explanation of symbols]

[0045] 1 motor housing, 2 reducer housing, 3 controller housing, 4 motor rear cover, 5 reducer rear cover, 6 controller cover, 7 oil distribution passage, 8 first water passage.

Claims

1. A housing structure for an electric drive assembly, the housing structure including a motor housing, a reducer housing, a controller housing, an oil cooling assembly, and a water cooling assembly; At least two of the motor housing, the reducer housing, and the controller housing have an integrated structure; The oil cooling assembly includes an oil pumping unit and an oil passage, the oil passage is disposed inside the motor housing and inside the reduction gear housing, the oil pumping unit communicates with the oil passage and transports lubricating oil in the reduction gear housing to the oil passage, 13. A housing structure for an electric drive assembly, comprising: a water passage, the water passage being a circulating water passage and disposed inside the controller housing and inside the motor housing; and the water passage being connected to a water cooling source of a vehicle.

2. The motor housing, the reducer housing, and the controller housing are integrated into one body.

2. The housing structure according to claim 1, wherein the controller housing is provided above the motor housing, and the reducer housing is provided on the power output side of the motor housing.

3. The oil passage includes several oil distribution passages, 2. The housing structure according to claim 1, wherein the oil discharge positions of the oil distribution passages correspond to the components to be cooled and lubricated in the motor housing, and the components to be cooled and lubricated in the reducer housing, respectively.

4. The housing structure according to claim 1, characterized in that the water passage includes a first water passage provided on the bottom and / or side wall of the controller housing, and a second water passage provided between the motor housing and the motor water jacket, and the first water passage and the second water passage are connected via a connecting water passage.

5. 5. The housing structure according to claim 4, wherein the cooling water in the water-cooling source passes through the first water passage, the connecting water passage, and the second water passage in sequence, and is returned to the water-cooling source.

6. 6. The housing structure according to claim 5, wherein the first water passage is formed by a water groove provided in a bottom portion of the controller housing and a seal plate provided in the water groove.

7. The oil cooling assembly further includes a heat exchange unit; 2. The housing structure according to claim 1, wherein the oil passage and the water passage are both connected to the heat exchange unit, and the heat exchange unit realizes heat exchange between the lubricating oil in the oil passage and the cooling water in the water passage.

8. The housing structure further includes an oil filter assembly; 8. The housing structure according to claim 1, wherein the oil filter assembly is provided at the bottom of the reducer housing, the oil pumping unit is connected to the reducer housing via the oil filter assembly, and the oil filter assembly is used to filter lubricating oil.

9. The oil pumping unit includes an electronic oil pump and an electronic control device; 8. The housing structure according to claim 1, wherein the electronic oil pump is provided at the bottom of the motor housing or the reducer housing, and the electronic control device is used to control the operation of the electronic oil pump.

10. An electric drive assembly, characterized in that it uses a housing structure according to any one of claims 1 to 9.

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