A lubricating oil suction filter structure based on an electric drive assembly and the electric drive assembly

Abstract

The utility model provides a kind of lubricating oil suction filter structure based on electric drive assembly, including oil pump, oil passage and suction filter, suction filter includes two suction filter channels, oil passage includes two oil paths, two suction oil ports of two suction filter channels are spaced apart, the oil outlet of two suction filter channels is connected to the oil inlet of two oil paths respectively, and the oil outlet of two oil paths is in parallel;Input check valve and output check valve are arranged in two oil paths, and the intermediate node of input check valve and output check valve is connected to the two oil ports of oil pump, and the oil pump is bidirectional oil pump, by controlling the running direction of bidirectional oil pump, one suction oil port in two suction filter channels can be selected to suck oil, the selection of double suction oil port can be effectively realized, it is convenient to select low-position suction oil port according to the inclination attitude of vehicle, to avoid oil pump empty suction.The utility model can realize the selection of suction oil port by check valve and bidirectional oil pump, to effectively reduce the realization cost of avoiding oil pump empty suction.

Description

Technical Field

[0001] This utility model relates to the field of automotive technology, and in particular to a lubricating oil suction and filtration structure based on an electric drive assembly and the electric drive assembly. Background Technology

[0002] When a vehicle travels on different road conditions, with different slopes and inclines, at different angles, the lubricating oil enters the lower cavity due to gravity. At extreme angles, the oil suction port of the filter may not be filled with oil, causing the oil pump to suck in air. This can affect the cooling and lubrication of the electric drive assembly, leading to problems such as motor burnout, gear burnout, and bearing burnout.

[0003] For example, vehicles with off-road requirements have larger limits on uphill, downhill, and side tilt angles, and on steep inclines, the angle may reach 30°. As the vehicle's angle changes, the oil level in the electric drive assembly's oil pan changes, and the oil inlet may be above the level, causing cavitation. This can affect the cooling and lubrication of the electric drive assembly, leading to problems such as motor burnout, gear burnout, and bearing burnout.

[0004] In existing technologies, there are designs that use a dual-suction oil intake structure, where the oil intake ports of the two intake structures are set at different positions and each is equipped with an oil pump. When the angle of the vehicle changes, one oil intake port is always in a low position. The corresponding oil circuit is activated according to the angle of the vehicle, which can ensure the effectiveness of oil intake and prevent the oil pump from running dry. However, it requires two oil pumps, which increases the cost. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a lubricating oil suction and filtration structure based on an electric drive assembly and an electric drive assembly, so as to solve the problem of high cost of existing lubricating oil suction and filtration structures for solving the problem of oil pump cavitation.

[0006] This utility model provides a lubricating oil suction and filtration structure based on an electric drive assembly, comprising: an oil pump, an oil passage, and a suction filter, wherein... The suction filter includes two suction channels, the oil passage includes two oil passages, the two oil inlets of the two suction channels are spaced apart, the oil outlets of the two suction channels are respectively connected to the oil inlets of the two oil passages, and the oil outlets of the two oil passages are connected in parallel. Both of the oil circuits are equipped with an input check valve and an output check valve, and the intermediate node between the input check valve and the output check valve is connected to the two oil ports of the oil pump. The oil pump is a bidirectional oil pump.

[0007] Optionally, the suction filter includes a main body and a top cover, the main body including a cavity area and an outlet area disposed on one side of the cavity area, wherein, The cavity area is provided with a first cavity and a second cavity arranged side by side. The first cavity and the second cavity area are respectively provided with a first oil suction port and a second oil suction port. The first cavity and the second cavity are respectively provided with a first filter and a second filter. The outlet area is provided with two oil outlets, which are respectively connected to the first cavity and the second cavity, and each oil outlet is provided with a connector that is connected to the oil passage.

[0008] Optionally, the connecting structure between the cavity area and the outlet area is located on the same side of the filter, and the two connecting structures are arranged side by side.

[0009] Optionally, a sealing ring is provided between the connector and the oil passage.

[0010] Optionally, the first oil suction port and the second oil suction port are located at diagonal positions in the cavity area.

[0011] Optionally, the cavity area and the outlet area are arranged along the longitudinal direction of the filter, and the oil outlet is located on the inner side of the outlet area.

[0012] Optionally, the suction filter, the oil passage, and the oil pump are arranged along the longitudinal direction of the suction filter.

[0013] Optionally, the oil passage has a loop-shaped structure with multiple bends, the oil outlet of the oil passage is positioned to one side of the suction filter, and both oil passages include a connecting section that fits the oil port of the oil pump, the connecting section being located between the input check valve and the output check valve.

[0014] In another aspect, this utility model provides an electric drive assembly, including the above-described lubricating oil suction and filtration structure based on the electric drive assembly.

[0015] This utility model discloses a lubricating oil suction and filtration structure based on an electric drive assembly, comprising an oil pump, oil passages, and a suction filter. The suction filter includes two suction channels, and the oil passages include two oil circuits. The two oil inlets of the two suction channels are spaced apart, and the oil outlets of the two suction channels are respectively connected to the oil inlets of the two oil circuits. The oil outlets of the two oil circuits are connected in parallel. Each oil circuit is equipped with an input check valve and an output check valve, and the intermediate node between the input check valve and the output check valve is connected to the two oil ports of the oil pump. The oil pump is a bidirectional oil pump. By controlling the running direction of the bidirectional oil pump, one of the two suction channels can be selected to draw oil, which can effectively realize the selection of dual oil inlets. This facilitates the selection of the lower oil inlet according to the vehicle's tilt posture and avoids the oil pump drawing oil dry. This invention enables the selection of the oil suction port through a one-way valve and a two-way oil pump, which can effectively reduce the cost of avoiding dry suction of the oil pump. Furthermore, the output pressure of the oil pump will provide reverse pressure to the unselected input one-way valve, ensuring the sealing of the unselected oil suction port and ensuring the reliability of the single selection of the oil suction port. Attached Figure Description

[0016] Figure 1 This is an exploded view of the electric drive assembly in the embodiment of this utility model; Figure 2 This is a three-dimensional structural diagram of the lubricating oil suction and filtration structure in an embodiment of the present utility model; Figure 3 This is an exploded view of the filter of the lubricating oil suction and filtration structure in the embodiment of this utility model; Figure 4 This is a schematic diagram illustrating the working principle of the lubricating oil suction and filtration structure in the embodiments of this utility model.

[0017] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0018] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0019] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] To address the high cost of existing lubricating oil suction and filtration structures designed to prevent oil pump cavitation, this invention provides a lubricating oil suction and filtration structure based on an electric drive assembly. The structure includes an oil pump, oil passages, and a suction filter. The suction filter comprises two suction channels, and the oil passages comprise two oil lines. The two suction ports of the two suction channels are spaced apart, and the outlets of the two suction channels are connected to the inlets of the two oil lines, respectively. The outlets of the two oil lines are connected in parallel. Each oil line is equipped with an input check valve and an output check valve, with the intermediate node between the input and output check valves connected to the two oil ports of the oil pump. The oil pump is a bidirectional pump; by controlling the operating direction of the bidirectional pump, oil can be selectively drawn from one of the two suction ports, effectively achieving dual suction port selection. This facilitates selecting the lower suction port based on the vehicle's tilt posture, preventing the oil pump from cavitating. The selection of the suction port is achieved through the check valves and the bidirectional pump, effectively reducing the cost of preventing oil pump cavitation.

[0022] Specifically, please refer to Figures 1 to 4 The lubricating oil suction and filtration structure in this embodiment is mainly used in the electric drive assembly, including an oil pump 203, an oil passage 40 and a suction filter 30, each part being fixedly connected to the motor housing 202.

[0023] The filter 30 includes two suction channels, and the oil passage 40 includes two oil passages. The two oil inlets of the two suction channels are spaced apart, and the oil outlets of the two suction channels are respectively connected to the oil inlets of the two oil passages. The oil outlets of the two oil passages are connected in parallel to form the final oil outlet 405. Each of the two oil passages is equipped with an input check valve and an output check valve, and the intermediate node between the input check valve and the output check valve is connected to the two oil ports of the oil pump. The oil pump is a bidirectional oil pump 203.

[0024] like Figure 4 As shown, the conduction direction of each check valve is from the oil suction port to the oil discharge port. When the first oil suction port 307 needs to be selected, the bidirectional oil pump 203 operates in the forward direction. The negative pressure on the input side of the bidirectional oil pump 203 at this time causes the second check valve 302 to open and the fourth check valve 304 to close. The positive pressure on the output side causes the first check valve 301 to close and the third check valve 303 to open, which effectively ensures that only the first oil suction port 307 is used. When the bidirectional oil pump 203 runs in the reverse direction, the second oil suction port 308 is activated. Through the bidirectional oil pump 203, each check valve can be a mechanical check valve, reducing the cost of the valves.

[0025] To facilitate the installation and positioning of the suction filter 300, in this embodiment, as follows: Figure 2 and Figure 3As shown, the suction filter 30 has a flat structure and can be fitted onto the corresponding mounting surface of the motor housing 202. The suction filter includes a main body 312 and a top cover 309. The main body 312 includes a cavity area and an outlet area disposed on one side of the cavity area. The cavity area is provided with a first cavity 318 and a second cavity 317 arranged side by side. The first cavity 318 and the second cavity 317 are respectively provided with a first oil suction port 307 and a second oil suction port 308. The first cavity 318 and the second cavity 317 are respectively provided with a first filter screen 311 and a second filter screen 310. The outlet area is provided with two oil outlets, which are respectively connected to the first cavity 318 and the second cavity 317, and the oil outlets are provided with a connector connected to the oil passage 40.

[0026] To facilitate the connection between the cavity area and the outlet area, in this embodiment, the connection structure between the cavity area and the outlet area is set on the same side of the suction filter 30. The two connection structures are arranged side by side and distributed inside and outside. The outer connection structure is C-shaped so that the two oil outlets of the outlet area are led out from the same side.

[0027] To facilitate the connection between the suction filter 30 and the oil passage 40, the two oil outlets in the outlet area are respectively provided with a first connector 315 and a second connector 316. The two connectors are embedded into the oil inlet of the oil passage 40. The first connector 315 and the second connector 316 are respectively provided with a first sealing ring 313 and a second sealing ring 314 to ensure the sealing of the connection between the connector and the oil passage 40.

[0028] To facilitate the setting of the one-way valve, in this embodiment, the first one-way valve 301 and the second one-way valve 302 are respectively set in the second connector 316 and the first connector 315.

[0029] To increase the height difference between the two oil suction ports when the vehicle is tilted, so as to ensure that the lower oil suction port can be effectively immersed in the low-level lubricating oil in the motor housing 202, in this embodiment, the first oil suction port 307 and the second oil suction port 308 are located at opposite positions in the cavity area.

[0030] To facilitate the assembly and connection of the lubricating oil suction filter structure, such as Figure 2 As shown, the cavity area and the outlet area are arranged along the longitudinal direction of the filter, the oil outlet is located on the inner side of the outlet area, and the oil passage 40 is arranged in the empty area of ​​the outlet area, so that the lateral width of the projection of the oil passage 40 and the filter 30 is the same, which can reduce the space occupation requirement and facilitate the installation in the motor housing 202.

[0031] The oil passage 40 includes a first input oil passage 401, a second input oil passage 402, a first output oil passage 403, and a second output oil passage 404. Two output check valves are disposed in the first output oil passage 403 and the second output oil passage 404. The first input oil passage 401 is connected to the first output oil passage 403, and the second input oil passage 402 is connected to the second output oil passage 404. The passage is bent multiple times along its vertical direction, making the first output oil passage 403 and the second output oil passage 404 parallel to the oil port mating surfaces of the bidirectional oil pump 203. Openings are located at the input ends of the first output oil passage 403 and the second output oil passage 404, serving as connection sections for the bidirectional oil pump 203, connecting to the oil port of the bidirectional oil pump 203. This connection section is located between the input check valve and the output check valve.

[0032] The oil outlets of the first output oil passage 403 and the second output oil passage 404 are positioned to the side of the suction filter 30, such as... Figure 1 As shown, this facilitates the installation of the output check valve, and the final parallel oil outlet 405 is led out from the top.

[0033] This utility model also provides an electric drive assembly, including the above-mentioned lubricating oil suction and filtration structure based on the electric drive assembly. With the arrangement of dual oil suction ports, when the vehicle is tilted, the lower oil suction port can be activated and the higher oil suction port can be closed to avoid the oil pump from sucking dry and ensure the reliability of the lubricating oil circulation system. Moreover, it can be achieved with a single oil pump and a mechanical check valve, which can effectively reduce the implementation cost.

[0034] The lubricating oil suction and filtration structure of this utility model can achieve the selection of the oil suction port through a one-way valve and a two-way oil pump, which can effectively reduce the implementation cost of avoiding the oil pump from dry suction. Moreover, the output pressure of the oil pump will provide reverse pressure to the unselected input one-way valve, ensuring the sealing of the unselected oil suction port and ensuring the reliability of the single selection of the oil suction port.

[0035] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0036] The embodiments described above are merely illustrative of several specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of protection of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the scope of protection of this utility model. Therefore, the scope of protection of this utility model patent should be determined by the appended claims.

Claims

1. A lubricating oil suction and filtration structure based on an electric drive assembly, characterized in that, include: Oil pump, oil passage and suction filter, among which, The suction filter includes two suction channels, the oil passage includes two oil passages, the two oil inlets of the two suction channels are spaced apart, the oil outlets of the two suction channels are respectively connected to the oil inlets of the two oil passages, and the oil outlets of the two oil passages are connected in parallel. Both of the oil circuits are equipped with an input check valve and an output check valve, and the intermediate node between the input check valve and the output check valve is connected to the two oil ports of the oil pump. The oil pump is a bidirectional oil pump.

2. The lubricating oil suction and filtration structure based on an electric drive assembly according to claim 1, characterized in that, The suction filter includes a main body and a top cover. The main body includes a cavity area and an outlet area disposed on one side of the cavity area. The cavity area is provided with a first cavity and a second cavity arranged side by side. The first cavity and the second cavity area are respectively provided with a first oil suction port and a second oil suction port. The first cavity and the second cavity are respectively provided with a first filter and a second filter. The outlet area is provided with two oil outlets, which are respectively connected to the first cavity and the second cavity, and each oil outlet is provided with a connector that is connected to the oil passage.

3. The lubricating oil suction and filtration structure based on an electric drive assembly according to claim 2, characterized in that, The connecting structure between the cavity area and the outlet area is located on the same side of the filter, and the two connecting structures are arranged side by side.

4. The lubricating oil suction and filtration structure based on the electric drive assembly according to claim 2, characterized in that, A sealing ring is provided between the connector and the oil passage.

5. The lubricating oil suction and filtration structure based on an electric drive assembly according to claim 2, characterized in that, The first oil suction port and the second oil suction port are located at diagonal positions in the cavity area.

6. The lubricating oil suction and filtration structure based on an electric drive assembly according to claim 2, characterized in that, The cavity area and the outlet area are arranged along the longitudinal direction of the filter, and the oil outlet is located on the inner side of the outlet area.

7. The lubricating oil suction and filtration structure based on an electric drive assembly according to claim 6, characterized in that, The suction filter, the oil passage, and the oil pump are arranged longitudinally along the suction filter.

8. The lubricating oil suction and filtration structure based on an electric drive assembly according to claim 7, characterized in that, The oil passage has a loop-shaped structure with multiple bends. The oil outlet of the oil passage is positioned to one side of the suction filter. Both oil passages include a connecting section that fits the oil port of the oil pump. The connecting section is located between the input check valve and the output check valve.

9. An electric drive assembly, characterized in that, Includes the lubricating oil suction and filtration structure based on an electric drive assembly as described in any one of claims 1 to 8.

Images