A cooling and lubricating device, a hybrid drive system and a vehicle

Abstract

The present invention discloses a cooling and lubricating device, a hybrid drive system and a vehicle, belonging to the technical field of hybrid lubrication and cooling. The cooling and lubricating device includes: a first housing; a second housing connected to the first housing to form a gear chamber for accommodating a drive shaft system; an end cover connected to the first housing to form a motor chamber for accommodating a drive motor, and the first housing is disposed between the second housing and the end cover; wherein, a first oil passage is provided on the end cover, a oil collecting assembly communicated with the first oil passage is provided in the gear chamber, and an oil port of the oil collecting assembly is communicated with a bearing seat of the drive shaft system disposed on the second housing. The cooling and lubricating device, the hybrid drive system and the vehicle of the present invention can lubricate the drive shaft system and reduce costs.

Description

Technical Field

[0001] The present invention relates to the technical field of hybrid lubrication and cooling, and particularly relates to a cooling and lubricating device, a hybrid drive system and a vehicle. Background Art

[0002] A drive shaft system is arranged in a hybrid electric drive system. To ensure the normal operation of the hybrid electric drive system, it is necessary to lubricate and cool the drive shaft system.

[0003] However, in the prior art, due to the arrangement of the drive motor, there is a large height difference between the drive motor shaft and the differential shaft of the drive shaft system, resulting in a high lubrication risk. Summary of the Invention

[0004] The present invention provides a cooling and lubricating device, a hybrid drive system and a vehicle, which solve or partially solve the technical problem that there is a large height difference between the drive motor shaft and the differential shaft in the prior art, resulting in a high lubrication risk.

[0005] To solve the above technical problem, the present invention provides a cooling and lubricating device, including: a first housing; a second housing connected to the first housing to form a gear chamber for accommodating the drive shaft system; an end cover connected to the first housing to form a motor chamber for accommodating the drive motor, and the first housing is disposed between the second housing and the end cover; wherein, a first oil passage is provided on the end cover, and an oil collecting assembly communicated with the first oil passage is provided in the gear chamber, and an oil port of the oil collecting assembly is communicated with a bearing seat of the drive shaft system disposed on the second housing.

[0006] Further, at least one bearing seat for installing the drive shaft system is provided on the second housing, and the oil collecting assembly includes: at least one oil collecting chamber for storing oil liquid, and the oil collecting chamber is communicated with the first oil passage and the at least one bearing seat.

[0007] Further, more than two oil collecting chambers are provided, and the more than two oil collecting chambers are communicated in sequence, and at least one oil collecting chamber is communicated with the bearing seat.

[0008] Further, the at least one bearing seat includes a drive motor shaft bearing seat, an EV intermediate shaft bearing seat and a shift drum shaft bearing seat; three oil collecting chambers are provided, namely a first oil collecting chamber, a second oil collecting chamber and a third oil collecting chamber, and the first oil collecting chamber, the second oil collecting chamber and the third oil collecting chamber are communicated in sequence, the first oil collecting chamber is communicated with the first oil passage, the drive motor shaft bearing seat and the EV intermediate shaft bearing seat, and the third oil collecting chamber is communicated with the shift drum shaft bearing seat.

[0009] Further, the second oil collecting cavity communicates with the top of the first oil collecting cavity, and the second oil collecting cavity communicates with the bottom of the third oil collecting cavity.

[0010] Further, the drive shaft system includes an input shaft and an EV intermediate shaft meshing with the input shaft. The second oil collecting cavity and the third oil collecting cavity are both provided with oil discharge ports to deliver lubricating oil to the meshing part of the input shaft and the EV intermediate shaft.

[0011] Further, the first oil collecting cavity is provided with a splash oil port, and the splash oil port faces the first housing.

[0012] Further, the oil collecting assembly further includes: a first bearing housing oil passage provided on the second housing, the first bearing housing oil passage communicating with the oil port of the first oil collecting cavity and the drive motor shaft bearing housing respectively; a second bearing housing oil passage provided on the second housing, the second bearing housing oil passage communicating with the first bearing housing oil passage and the EV intermediate shaft bearing housing respectively; a plurality of oil ribs provided on the second housing to form a third bearing housing oil passage, the third bearing housing oil passage communicating with the oil port of the third oil collecting cavity and the shift drum shaft bearing housing respectively.

[0013] Further, the cooling and lubricating device further includes: an oil baffle provided on the end face of the first housing facing the end cover to form an oil cavity; a spray oil pipe communicating with the first oil passage and the oil cavity; wherein, the first housing is provided with an oil inlet hole communicating with the oil cavity and the oil collecting assembly.

[0014] Further, the drive motor includes a rotor shaft provided with a through hole, and the cooling and lubricating device further includes a second oil passage communicating with the through hole.

[0015] Further, the drive motor further includes a rotor shaft bearing housing supporting the rotor shaft. The second oil passage is embedded in the through hole, and there is a gap between the second oil passage and the through hole to form a fourth bearing housing oil passage communicating with the rotor shaft bearing housing.

[0016] Based on the same inventive concept, the present application further provides a hybrid drive system including the cooling and lubricating device.

[0017] Based on the same inventive concept, the present application further provides a vehicle including the hybrid drive system.

[0018] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0019] In the prior art, the lubrication of the drive motor shaft mainly adopts the form of splash lubrication, and the splash oil flow for splash lubrication comes from the agitation of the differential shaft. However, due to the large height difference between the drive motor shaft and the differential shaft, splash lubrication is difficult. To achieve the lubrication of the drive motor shaft, the conventional solution is to use a hydraulic system for forced lubrication, but the hydraulic system is complex, resulting in high costs.

[0020] Since the second housing is connected to the first housing to form a gear chamber for accommodating the drive shaft system, and the end cover is connected to the first housing to form a motor chamber for accommodating the drive motor, the first housing is disposed between the second housing and the end cover, and the end cover is provided with a first oil passage, and the gear chamber is provided with an oil collecting component communicated with the first oil passage. Therefore, integrating the oil collecting component in the gear chamber realizes high integration, reduces the number of parts, and realizes the effective distribution of lubricating oil. Since the oil port of the oil collecting component is communicated with the bearing seat of the drive shaft system disposed on the second housing, when it is necessary to lubricate the drive shaft system, the lubricating oil is conveyed to the oil collecting component through the first oil passage, and then the lubricating oil is directly supplied to the bearing seat of the drive shaft system disposed on the second housing through the oil collecting component, realizing the lubrication of the drive shaft system, ensuring the normal operation of the hybrid electric drive system, improving the transmission efficiency, not requiring an additional hydraulic system, and reducing costs. Description of the Drawings

[0021] Figure 1 Structural schematic diagram of the cooling and lubricating device provided by an embodiment of the present invention;

[0022] Figure 2 For Figure 1 Arrangement schematic diagram of the oil collecting component of the cooling and lubricating device in

[0023] Figure 3 For Figure 2 Side view of

[0024] Figure 4 For Figure 1 Structural schematic diagram of the end cover of the cooling and lubricating device in

[0025] Figure 5 For Figure 1 Arrangement schematic diagram of the first oil passage of the cooling and lubricating device in

[0026] Figure 6 For Figure 1 Arrangement schematic diagram of the second oil passage of the cooling and lubricating device in

[0027] Figure 7 For Figure 1 Arrangement schematic diagram of the oil baffle of the cooling and lubricating device in

[0028] Figure 8 For Figure 1Schematic structural diagram of the oil collecting assembly of the middle cooling and lubricating device;

[0029] Figure 9 is Figure 1 Oil supply schematic diagram of the oil collecting assembly of the middle cooling and lubricating device. Specific implementation manners

[0030] Refer to Figure 1-5 , a cooling and lubricating device provided by an embodiment of the present invention includes: a first housing 1, a second housing 2 and an end cover 3.

[0031] The second housing 2 is connected to the first housing 1 to form a gear cavity for accommodating a transmission shaft system 4.

[0032] The end cover 3 is connected to the first housing 1 to form a motor cavity for accommodating a driving motor, and the first housing 1 is disposed between the second housing 2 and the end cover 3.

[0033] Wherein, a first oil passage 5 is provided on the end cover 3, an oil collecting assembly 6 communicated with the first oil passage 5 is provided in the gear cavity, and an oil port of the oil collecting assembly 6 is communicated with a bearing seat of the transmission shaft system 4 disposed on the second housing 2.

[0034] In the prior art, the lubrication of the driving motor shaft is mainly in the form of splash lubrication, and the splash oil flow for splash lubrication comes from the agitation of the differential shaft. However, due to the large height difference between the driving motor shaft and the differential shaft, splash lubrication is difficult. In order to achieve the lubrication of the driving motor shaft, the conventional solution is to use a hydraulic system for forced lubrication, and the hydraulic system is complex, resulting in high costs.

[0035] Since the second housing 2 is connected to the first housing 1 to form a gear cavity for accommodating the transmission shaft system 4, the end cover 3 is connected to the first housing 1 to form a motor cavity for accommodating the driving motor, the first housing 1 is disposed between the second housing 2 and the end cover 3, and a first oil passage 5 is provided on the end cover 3, and an oil collecting assembly 6 communicated with the first oil passage 5 is provided in the gear cavity. Therefore, the oil collecting assembly 6 is integrated in the gear cavity, realizing high integration, reducing the number of parts, and realizing the effective distribution of lubricating oil. Since the oil port of the oil collecting assembly 6 is communicated with the bearing seat of the transmission shaft system 4 disposed on the second housing 2, when it is necessary to lubricate the transmission shaft system 4, the lubricating oil is conveyed into the oil collecting assembly 6 through the first oil passage 5, and then the lubricating oil is directly supplied to the bearing seat of the transmission shaft system 4 disposed on the second housing 2 through the oil collecting assembly 6, so as to realize the lubrication of the transmission shaft system 4, ensure the normal operation of the hybrid electric drive system, improve the transmission efficiency, and do not require an additional hydraulic system, reducing costs.

[0036] In some embodiments, due to the integrated arrangement of the driving motor and the transmission shaft system 4, a vacant space will be formed above the gear cavity, and the oil collecting assembly 6 is disposed in the vacant space, with a compact layout and space saving.

[0037] In some embodiments, at least one bearing seat for mounting a drive shaft system is provided on the second housing 2, and the oil collecting assembly includes: at least one oil collecting cavity for storing oil, and the oil collecting cavity communicates with the first oil passage and at least one bearing seat.

[0038] In this embodiment, when lubricating the drive shaft system 4, the lubricating oil is delivered to the oil collecting cavity through the first oil passage 5, the oil is stored in the oil collecting cavity, and then the lubricating oil is directly supplied to the bearing seat through the oil collecting cavity, so as to lubricate the drive shaft system 4, ensure the normal operation of the hybrid electric drive system, improve the transmission efficiency, eliminate the need for an additional hydraulic system, and reduce costs.

[0039] In this embodiment, there are more than two oil collecting cavities, and the more than two oil collecting cavities are connected in sequence, and at least one oil collecting cavity communicates with the bearing seat. Among them, when lubricating the drive shaft system 4, the lubricating oil is delivered to the oil collecting cavity through the first oil passage 5, the oil is stored in the oil collecting cavity, and then the lubricating oil is directly supplied to the bearing seat through the oil collecting cavity, so as to lubricate the drive shaft system 4, ensure the normal operation of the hybrid electric drive system, improve the transmission efficiency, eliminate the need for an additional hydraulic system, and reduce costs.

[0040] See Figure 8-9 , in this embodiment, at least one bearing seat includes a drive motor shaft bearing seat 4-4, an EV intermediate shaft bearing seat 4-5, and a shift drum shaft bearing seat 4-6. The drive shaft system 4 includes: a drive motor shaft 4-1, an EV intermediate shaft 4-2, and a shift drum shaft 4-3. Among them, the drive motor shaft 4-1 is provided on the second housing 2 through the drive motor shaft bearing seat 4-4, the EV (electric vehicle, pure electric form) intermediate shaft 4-2 is provided on the second housing 2 through the EV intermediate shaft bearing seat 4-5, and the shift drum shaft 4-3 is provided on the second housing 2 through the shift drum shaft bearing seat 4-6.

[0041] In this embodiment, there are three oil collecting cavities, namely a first oil collecting cavity 6-1, a second oil collecting cavity 6-2, and a third oil collecting cavity 6-3. The first oil collecting cavity 6-1, the second oil collecting cavity 6-2, and the third oil collecting cavity 6-3 are connected in sequence. The first oil collecting cavity 6-1 communicates with the first oil passage 5, the drive motor shaft bearing seat 4-4, and the EV intermediate shaft bearing seat 4-5, and the third oil collecting cavity 6-3 communicates with the shift drum shaft bearing seat 4-6.

[0042] See Figure 2, in this embodiment, there is a large height difference t1 between the differential shaft 4-7 of the drive shaft system 4 and the drive motor shaft 4-1, which makes splash lubrication difficult. The first oil passage 5 of the present application supplies lubricating oil to the first oil collecting cavity 6-1, and the lubricating oil is collected through the first oil collecting cavity 6-1. The first oil collecting cavity 6-1 directly supplies the lubricating oil to the drive motor shaft bearing seat 4-4 and the EV intermediate shaft bearing seat 4-5 to lubricate and cool the drive motor shaft 4-1 and the EV intermediate shaft 4-2. The lubricating oil enters the second oil collecting cavity 6-2 through the first oil collecting cavity 6-1, and then enters the third oil collecting cavity 6-3 from the second oil collecting cavity 6-2. The third oil collecting cavity 6-3 directly supplies the lubricating oil to the shift drum shaft bearing seat 4-6 to lubricate and cool the shift drum shaft 4-3, ensuring the normal operation of the hybrid electric drive system, improving the transmission efficiency, eliminating the need for an additional hydraulic system, and reducing costs.

[0043] In this embodiment, the top of the second oil collecting cavity 6-2 is connected to the top of the first oil collecting cavity 6-1, and the bottom of the second oil collecting cavity 6-2 is connected to the bottom of the third oil collecting cavity 6-3. When the first oil collecting cavity 6-1 is filled with lubricating oil, the lubricating oil enters the second oil collecting cavity 6-2 through the top of the first oil collecting cavity 6-1, and then enters the third oil collecting cavity 6-3 from the bottom of the second oil collecting cavity 6-2, which can ensure the oil collection amount and smooth oil flow.

[0044] In this embodiment, the oil collecting assembly 6 further includes a first passage 6-4 communicating with the first oil collecting cavity 6-1 and the second oil collecting cavity 6-2 to ensure smooth oil flow in the oil collecting assembly 6. Among them, the length of the first passage 6-4 is 15 mm, and the width of the first passage 6-4 is 25 mm.

[0045] In this embodiment, the oil collecting assembly 6 further includes a second passage 6-5 communicating with the second oil collecting cavity 6-2 and the third oil collecting cavity 6-3 to ensure smooth oil flow in the oil collecting assembly 6. Among them, the length of the second passage 6-5 is 15 mm, and the width of the second passage 6-5 is 7 mm.

[0046] See Figure 3 , in this embodiment, the distance t2 in the axial direction between the gear on the differential shaft 4-7 and the drive motor shaft bearing seat 4-4 and the EV intermediate shaft bearing seat 4-5 is relatively large. When the gear chamber is inclined, the lubrication risk of the drive motor shaft bearing seat 4-4 and the EV intermediate shaft bearing seat 4-5 is high. The oil port of the first oil collecting cavity 6-1 is provided at the bottom of the first oil collecting cavity 6-1 and faces the second housing 2. When the gear chamber is inclined, the oil port of the first oil collecting cavity 6-1 can still supply the lubricating oil to the drive motor shaft bearing seat 4-4 and the EV intermediate shaft bearing seat 4-5 to lubricate and cool the drive motor shaft 4-1 and the EV intermediate shaft 4-2, ensuring the normal operation of the hybrid electric drive system, improving the transmission efficiency, eliminating the need for an additional hydraulic system, and reducing costs.

[0047] In this embodiment, a plurality of ribs are provided on the end surface of the first housing 1 facing the second housing 2 and are attached to the end surface of the second housing 2 facing the first housing 1 to form a first oil collecting cavity 6-1, a second oil collecting cavity 6-2 and a third oil collecting cavity 6-3, ensuring the oil collection capacity.

[0048] In some embodiments, the drive shaft system 4 includes an input shaft 4-8 which meshes with an EV intermediate shaft 4-2. In this embodiment, gears are provided on both the input shaft 4-8 and the EV intermediate shaft 4-2, and the two gears mesh with each other. Drain ports 6-6 are provided in both the second oil collecting cavity 6-2 and the third oil collecting cavity 6-3 to deliver lubricating oil to the meshing portion of the input shaft 4-8 and the EV intermediate shaft 4-2 to lubricate the meshing portion of the input shaft 4-8 and the EV intermediate shaft 4-2, ensuring the normal operation of the hybrid electric drive system, improving the transmission efficiency, eliminating the need for an additional hydraulic system, and reducing costs. Among them, the length of the drain port 6-6 is 8 mm and the width is 2 mm.

[0049] In some embodiments, the drive shaft system 4 further includes an ICE (internal combustion engine) intermediate shaft 4-9 to ensure the power transmission of the hybrid electric drive system.

[0050] In some embodiments, the drive shaft system 4 further includes a shift fork 4-10 to ensure the power transmission of the hybrid electric drive system.

[0051] In some embodiments, a splash oil port 6-7 is provided in the first oil collecting cavity 6-1, and the splash oil port 6-7 faces the first housing 1. The differential shaft 4-7 rotates, agitating the lubricating oil in the gear chamber, so that the lubricating oil enters the first oil collecting cavity 6-1 through the splash oil port 6-7, and the oil flow can be collected.

[0052] In this embodiment, when the drive shaft system 4 runs at high speed, the differential shaft 4-7 rotates rapidly, agitating the lubricating oil in the gear chamber, so that a large amount of lubricating oil enters the first oil collecting cavity 6-1 through the splash oil port 6-7, and the oil is collected through the first oil collecting cavity 6-1, reducing the oil agitation loss when the differential shaft 4-7 rotates rapidly and at the same time reducing the resistance when the drive shaft system 4 rotates. When the drive shaft system 4 runs at low speed, the lubricating oil in the second oil collecting cavity 6-2 and the third oil collecting cavity 6-3 is discharged through the drain ports 6-6 to ensure the amount of lubricating oil in the gear chamber.

[0053] Specifically, the oil collecting assembly 6 further includes: a first bearing block oil passage 6-8, a second bearing block oil passage 6-9 and a plurality of oil ribs 6-10.

[0054] The first bearing housing oil passage 6-8 is provided on the second housing 2. The first bearing housing oil passage 6-8 is respectively communicated with the oil port of the first oil collecting cavity 6-1 and the drive motor shaft bearing housing 4-4. The first bearing housing oil passage 6-8 supplies the lubricating oil in the first oil collecting cavity 6-1 to the drive motor shaft bearing housing 4-4 to lubricate and cool the drive motor shaft 4-1, ensuring the normal operation of the hybrid electric drive system, improving the transmission efficiency, eliminating the need for an additional hydraulic system, and reducing costs.

[0055] The second bearing housing oil passage 6-9 is provided on the second housing 2. The second bearing housing oil passage 6-9 is respectively communicated with the first bearing housing oil passage and the EV intermediate shaft bearing housing 4-5. The second bearing housing oil passage 6-9 supplies the lubricating oil in the first bearing housing oil passage 6-8 to the EV intermediate shaft bearing housing 4-5 to lubricate and cool the EV intermediate shaft 4-2, ensuring the normal operation of the hybrid electric drive system, improving the transmission efficiency, eliminating the need for an additional hydraulic system, and reducing costs.

[0056] A plurality of oil ribs 6-10 are provided on the second housing 2 to form a third bearing housing oil passage 6-11. The third bearing housing oil passage 6-11 is respectively communicated with the oil port of the third oil collecting cavity 6-3 and the shift drum shaft bearing housing 4-6. The third bearing housing oil passage 6-11 supplies the lubricating oil in the third oil collecting cavity 6-3 to the shift drum shaft bearing housing 4-6 to lubricate and cool the shift drum shaft 4-3, ensuring the normal operation of the hybrid electric drive system, improving the transmission efficiency, eliminating the need for an additional hydraulic system, and reducing costs.

[0057] See Figure 7 , in some embodiments, the cooling and lubricating device further includes: an oil baffle 7 and an oil injection pipe 8.

[0058] The oil baffle 7 is provided on the end face of the first housing 1 facing the end cover 3 to form an oil cavity.

[0059] The oil injection pipe 8 is communicated with the first oil passage 5 and the oil cavity. In this embodiment, the first oil passage 5 has two oil inlets 5-1 to ensure the amount of lubricating oil supplied.

[0060] Wherein, an oil inlet hole 1-1 communicating with the oil cavity and the oil collecting assembly 6 is opened on the first housing 1.

[0061] In this embodiment, the first oil passage 5 supplies the lubricating oil to the oil injection pipe 8. The oil injection pipe 8 transports the lubricating oil into the oil cavity. The lubricating oil is buffered through the oil cavity to ensure that the lubricating oil can smoothly enter the oil collecting assembly 6 through the oil inlet hole 1-1 to supply oil to the oil collecting assembly 6.

[0062] See Figure 6, in some embodiments, the drive motor includes a rotor shaft 9 provided with a through hole 9-1. In this embodiment, the through hole 9-1 and the rotor shaft 9 are coaxially arranged to ensure smooth flow of lubricating oil. The cooling and lubricating device further includes a second oil passage 10 communicating with the through hole 9-1.

[0063] In this embodiment, the second oil passage 10 conveys the lubricating oil into the through hole 9-1, and the through hole 9-1 conveys the lubricating oil into the drive motor to cool and lubricate the drive motor.

[0064] In this embodiment, the drive motor further includes a rotor shaft bearing seat 11 supporting the rotor shaft 9. The second oil passage 10 is embedded in the through hole 9-1, and there is a gap between the second oil passage 10 and the through hole to form a fourth bearing seat oil passage 12 communicating with the rotor shaft bearing seat 11. In this embodiment, an oil guiding ring 13 is provided at the end of the second oil passage 10. The oil guiding ring 13 is embedded in the through hole 9-1, and there is a gap between the oil guiding ring 13 and the through hole to form a fourth bearing seat oil passage 12 communicating with the rotor shaft bearing seat 11.

[0065] In this embodiment, when the second oil passage 10 conveys the lubricating oil into the through hole 9-1 through the oil guiding ring 13, part of the lubricating oil flows back and enters the rotor shaft bearing seat 11 through the fourth bearing seat oil passage 12 for lubrication and cooling.

[0066] Based on the same inventive concept, the present application further provides a hybrid drive system. The hybrid drive system adopts the cooling and lubricating device described above. The specific structure of the cooling and lubricating device refers to the above embodiments. Since all the technical solutions of the above embodiments are adopted, it has at least all the beneficial effects brought by the above embodiments, which will not be described in detail herein.

[0067] Based on the same inventive concept, the present application further provides a vehicle. The vehicle adopts the hybrid drive system described above. The specific structure of the hybrid drive system refers to the above embodiments. Since all the technical solutions of the above embodiments are adopted, it has at least all the beneficial effects brought by the above embodiments, which will not be described in detail herein.

[0068] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the examples, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A cooling and lubricating device, characterized in that, Comprising: A first housing; A second housing, connected to the first housing to form a gear chamber for accommodating a transmission shaft system; An end cover, connected to the first housing to form a motor chamber for accommodating a drive motor, and the first housing is disposed between the second housing and the end cover; Wherein, a first oil passage is provided on the end cover, an oil collecting assembly communicating with the first oil passage is provided in the gear chamber, and an oil port of the oil collecting assembly is communicated with a bearing seat of the transmission shaft system disposed on the second housing; At least one bearing seat for mounting the transmission shaft system is provided on the second housing, and the oil collecting assembly includes: at least one oil collecting chamber for storing oil, and the oil collecting chamber is communicated with the first oil passage and the at least one bearing seat; More than two oil collecting chambers are provided, and the more than two oil collecting chambers are sequentially communicated, and at least one oil collecting chamber is communicated with the bearing seat; A plurality of ribs are provided on an end surface of the first housing facing the second housing and are attached to an end surface of the second housing facing the first housing to form more than two oil collecting chambers; The at least one bearing seat includes a drive motor shaft bearing seat, an EV intermediate shaft bearing seat, and a shift drum shaft bearing seat; three oil collecting chambers are provided, which are respectively a first oil collecting chamber, a second oil collecting chamber, and a third oil collecting chamber, and the first oil collecting chamber, the second oil collecting chamber, and the third oil collecting chamber are sequentially communicated. The first oil collecting chamber is communicated with the first oil passage, the drive motor shaft bearing seat, and the EV intermediate shaft bearing seat, and the third oil collecting chamber is communicated with the shift drum shaft bearing seat.

2. The cooling and lubricating device according to claim 1, characterized in that, The top of the second oil collecting chamber is communicated with the first oil collecting chamber, and the bottom of the second oil collecting chamber is communicated with the third oil collecting chamber.

3. The cooling and lubricating device according to claim 1, characterized in that The transmission shaft system includes an input shaft and an EV intermediate shaft meshing with the input shaft. Both the second oil collecting chamber and the third oil collecting chamber are provided with oil discharge ports to deliver lubricating oil to the meshing portion of the input shaft and the EV intermediate shaft.

4. The cooling and lubricating device according to claim 1, characterized in that A splash oil port is provided in the first oil collecting chamber, and the splash oil port faces the first housing.

5. The cooling and lubrication device according to claim 1, characterized in that, The oil collecting assembly further includes: A first bearing seat oil passage, provided on the second housing, and the first bearing seat oil passage is respectively communicated with an oil port of the first oil collecting chamber and the drive motor shaft bearing seat; A second bearing seat oil passage, provided on the second housing, and the second bearing seat oil passage is respectively communicated with the first bearing seat oil passage and the EV intermediate shaft bearing seat; A plurality of oil ribs, provided on the second housing to form a third bearing seat oil passage, and the third bearing seat oil passage is respectively communicated with an oil port of the third oil collecting chamber and the shift drum shaft bearing seat.

6. The cooling and lubricating device according to claim 1, characterized in that, The cooling and lubricating device further includes: An oil baffle, provided on an end surface of the first housing facing the end cover to form an oil chamber; A spray oil pipe, communicated with the first oil passage and the oil chamber; Wherein, an oil inlet hole communicating with the oil chamber and the oil collecting assembly is provided on the first housing.

7. The coolant-lubricant device according to claim 1, characterized in that, The drive motor includes a rotor shaft provided with a through hole, and the cooling and lubricating device further includes a second oil passage communicated with the through hole.

8. The coolant-lubricant device according to claim 7, characterized in that, The drive motor further includes a rotor shaft bearing seat for supporting the rotor shaft. The second oil passage is embedded in the through hole, and there is a gap between the second oil passage and the through hole to form a fourth bearing seat oil passage communicating with the rotor shaft bearing seat.

9. A hybrid drive system, characterized in that, It includes the cooling and lubricating device according to any one of claims 1-8.

10. A vehicle, characterized in that, It includes the hybrid drive system according to claim 9.

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