Driving lubricating system and vehicle

Abstract

The utility model provides a driving lubrication system and a vehicle, and relates to the technical field of vehicle lubrication.The driving lubrication system comprises a shell, a suction filter, an oil pump and an oil cooler, and the shell is internally provided with a first containing cavity used for containing a motor and a second containing cavity used for containing a speed reducer; a first lubricating oil way, a second lubricating oil way, a third lubricating oil way and an oil inlet are arranged on the shell wall of the shell, a liquid inlet of the suction filter is communicated with the oil inlet, a liquid outlet of the suction filter is communicated with a liquid inlet of the oil pump through the first lubricating oil way, and a liquid outlet of the oil pump is communicated with an oil inlet of the oil cooler through the second lubricating oil way. The second containing cavity communicates with the second lubricating oil way, and an oil outlet hole of the oil cooler communicates with the first containing cavity through a third lubricating oil way. Therefore, the lubricating oil way arranged on the shell can be used for replacing an oil pipe for lubrication, so that the resistance of the oil way is reduced, the pressure loss of a lubricating system is reduced, and meanwhile, the failure rate, the material cost and the management cost of the lubricating oil way can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of vehicle lubrication technology, and more specifically, to a drive lubrication system and a vehicle. Background Technology

[0002] The electric drive system is a core component of new energy vehicles. It has a high degree of integration, which can not only improve the overall performance of the vehicle, but also effectively increase the passenger space and storage space of the vehicle, meeting users' needs for space utilization efficiency.

[0003] Currently, electric drive systems typically use a combination of splash lubrication and active lubrication to lubricate the motor and transmission components. The active lubrication scheme involves distributing lubricating oil to various components after it flows through a filter, low-pressure oil pipe, and oil cooler. This results in a long lubrication path, high oil resistance, poor lubrication effect, and a large space occupied by the lubrication path, which is not conducive to the overall vehicle layout. Utility Model Content

[0004] The problem this invention addresses is: how to improve the lubrication effect on the motor and transmission components in an electric drive system while reducing the space occupied by the lubrication oil circuit.

[0005] To solve the above problems, this utility model provides a drive lubrication system and a vehicle.

[0006] In a first aspect, this utility model provides a drive lubrication system, including a housing and a filter, an oil pump, and an oil cooler mounted on the housing. The housing has a first receiving cavity for accommodating a motor and a second receiving cavity for accommodating a reducer. The housing wall has a first lubricating oil passage, a second lubricating oil passage, a third lubricating oil passage, and an oil inlet. The inlet of the filter is connected to the oil inlet. The outlet of the filter and the inlet of the oil pump are connected through the first lubricating oil passage. The outlet of the oil pump and the inlet of the oil cooler are connected through the second lubricating oil passage. The second receiving cavity is connected to the second lubricating oil passage. The outlet of the oil cooler and the first receiving cavity are connected through the third lubricating oil passage. The lubricating oil flows sequentially through the oil inlet, the filter, the first lubricating oil passage, the oil pump, and the second lubricating oil passage into the inlet of the oil cooler and the second receiving cavity, respectively.

[0007] Optionally, the oil inlet is located below the first receiving cavity and extends through the lower part of the cavity wall of the second receiving cavity facing the first receiving cavity, and the oil inlet communicates with the second receiving cavity.

[0008] Optionally, the housing includes a first housing portion, an intermediate housing portion, and a second housing portion arranged sequentially along the axial direction of the first receiving cavity. The first housing portion and the intermediate housing portion form the first receiving cavity, and the second housing portion and the intermediate housing portion form the second receiving cavity. The second lubricating oil passage includes a first oil passage, a second oil passage, and a third oil passage connected in sequence. The first lubricating oil passage, the first oil passage, the third oil passage, and the third lubricating oil passage are disposed on the first housing. The oil inlet and the second oil passage are disposed on the intermediate housing portion. The outlet of the oil pump is connected to the first oil passage, the oil inlet of the oil cooler is connected to the third oil passage, and the second receiving cavity is connected to the second oil passage.

[0009] Optionally, the second oil passage includes a first channel, a second channel, a third channel, and a fourth channel, wherein the first channel, the second channel, and the third channel are connected end to end in sequence, the first channel is connected to the first oil passage, the third channel is connected to the third oil passage, and the fourth channel is connected to the second channel and the second receiving cavity respectively; and the first oil passage, the first channel, and the third channel extend along a predetermined direction, and the second channel extends perpendicular to the predetermined direction, wherein the predetermined direction is parallel to the axial direction of the first receiving cavity.

[0010] Optionally, the intermediate housing portion is provided with a bearing mounting groove, and the inner wall of the second channel is provided with an oil injection hole, which communicates with the bearing mounting groove.

[0011] Optionally, the third oil passage includes a fifth channel extending along the set direction and a sixth channel extending perpendicular to the set direction, the fifth channel communicating with the third channel and the sixth channel communicating with the oil inlet of the oil cooler.

[0012] Optionally, the bottom of the housing is further provided with a first mounting cavity for installing the suction filter, and the lubricating oil enters the suction filter in sequence through the oil inlet, the first mounting cavity, and the liquid inlet of the suction filter.

[0013] Optionally, the housing further includes a second mounting cavity for mounting the oil pump. The cavity wall of the second mounting cavity has an oil outlet. The gap between the cavity wall of the second mounting cavity and the oil pump forms a fourth oil passage. The oil outlet of the oil pump is connected to the fourth oil passage. The fourth oil passage is connected to the second lubricating oil circuit through the oil outlet. The lubricating oil in the oil pump flows into the second lubricating oil circuit sequentially through the fourth oil passage and the oil outlet.

[0014] Optionally, the first lubricating oil passage is configured to extend axially along the first receiving cavity, and / or the third lubricating oil passage is configured to extend radially along the first receiving cavity.

[0015] Secondly, this utility model provides a vehicle including the drive lubrication system described above.

[0016] The beneficial effects of the drive lubrication system of this utility model are as follows: An integrated design of the drive system can be achieved by setting a first receiving cavity for accommodating the motor and a second receiving cavity for accommodating the reducer within the housing. Simultaneously, by setting a first lubricating oil passage, a second lubricating oil passage, a third lubricating oil passage, and an oil inlet on the housing wall, and connecting the liquid inlet of the suction filter to the oil inlet, connecting the liquid outlet of the suction filter to the liquid inlet of the oil pump through the first lubricating oil passage, connecting the liquid outlet of the oil pump to the oil inlet of the oil cooler through the second lubricating oil passage, connecting the second receiving cavity to the second lubricating oil passage, and connecting the oil outlet of the oil cooler to the first receiving cavity through the third lubricating oil passage, the lubricating oil can be diverted sequentially through the oil inlet, suction filter, first lubricating oil passage, oil pump, and second lubricating oil passage. A portion of the lubricating oil, after being cooled by the oil cooler, flows into the first receiving cavity through the third lubricating oil passage to cool and lubricate the motor, which generates a large amount of heat. The other portion of the lubricating oil flows into the second receiving cavity to lubricate the reducer, which generates less heat. In this way, the efficiency of lubricating oil circulation can be improved by boosting the oil pump, and the low-pressure oil pipe in related technologies can be replaced by a second lubrication circuit. This not only reduces the length of the lubrication circuit and pressure loss, but also reduces the number of parts and assembly processes, thereby lowering the failure rate, material, and management costs of the lubrication circuit. Furthermore, by placing the lubrication circuit on the shell wall of the housing, the space occupied by the lubrication circuit can be reduced, lowering the overall volume of the integrated drive system and facilitating its placement on the vehicle. Additionally, by diverting the lubricating oil through the second lubrication circuit into the oil cooler and the second receiving cavity, the lubricating oil used to lubricate the reducer does not need to pass through the oil cooler. This avoids increased oil resistance due to increased viscosity and reduced fluidity after cooling, further reducing oil circuit resistance and pressure loss in the lubrication system. In summary, the drive lubrication system provided by this invention can improve the lubrication effect on the motor and transmission components in the electric drive system while reducing the space occupied by the lubrication circuit. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the drive lubrication system in an embodiment of the present invention;

[0018] Figure 2 This is a cross-sectional view of the drive lubrication system in an embodiment of the present invention.

[0019] Figure 3 This is a cross-sectional view of the drive lubrication system at the first lubrication oil circuit in an embodiment of this utility model;

[0020] Figure 4 This is a schematic diagram of the lubricating oil flow path of the drive lubrication system in an embodiment of this utility model;

[0021] Figure 5 This is a cross-sectional view of the drive lubrication system at the suction filter and oil pump in an embodiment of this utility model;

[0022] Figure 6 This is a front view schematic diagram of the drive lubrication system in an embodiment of this utility model;

[0023] Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure at point AA;

[0024] Figure 8 This is a side view of the drive lubrication system in an embodiment of the present invention.

[0025] Figure 9 for Figure 8 Schematic diagram of the cross-sectional structure at point BB.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Housing; 11. First housing section; 111. First receiving cavity; 12. Intermediate housing section; 121. Second receiving cavity; 122. Bearing mounting groove; 13. First lubricating oil passage; 14. Second lubricating oil passage; 141. First oil passage; 142. Second oil passage; 1421. First channel; 1422. Second channel; 1423. Third channel; 1424. Fourth channel; 1424a. First groove segment; 1424b. Second groove Section; 1424c, Third groove section; 143, Third oil passage; 1431, Fifth channel; 1432, Sixth channel; 144, Oil injection hole; 15, Third lubrication oil passage; 16, Oil inlet; 17, First mounting cavity; 18, Second mounting cavity; 181, Oil outlet; 19, Fourth oil passage; 2, Suction filter; 3, Oil pump; 4, Oil cooler; 510, Stator; 520, Motor shaft; 600, Support bearing; 700, Reduction gear. Detailed Implementation

[0028] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Although some embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this utility model. It should be understood that the drawings and embodiments of this utility model are for illustrative purposes only and are not intended to limit the scope of protection of this utility model.

[0029] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this utility model are only used to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0030] It should be noted that the terms "one" and "multiple" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0031] In related technologies, electric drive systems typically use a combination of splash lubrication and active lubrication to lubricate the motor and transmission components. The active lubrication scheme utilizes lubricating oil to flow through a filter, low-pressure oil pipe, and oil cooler before distributing it to various components for lubrication. This results in a long lubrication path, high oil resistance, and a large space occupied by the lubrication path, which is not conducive to the overall vehicle layout.

[0032] To address the problems existing in the aforementioned related technologies, this utility model provides a drive lubrication system and a vehicle.

[0033] Combination Figures 1 to 4 As shown in the figure, a drive lubrication system provided by this utility model includes a housing 1 and a suction filter 2, an oil pump 3, and an oil cooler 4 mounted on the housing 1. The housing 1 has a first receiving cavity 111 for accommodating a motor and a second receiving cavity 121 for accommodating a reducer. The housing wall of the housing 1 has a first lubricating oil passage 13, a second lubricating oil passage 14, a third lubricating oil passage 15, and an oil inlet 16. The liquid inlet of the suction filter 2 is connected to the oil inlet 16, and the liquid outlet of the suction filter 2 is connected to the oil inlet 16. The inlet of pump 3 is connected through the first lubricating oil passage 13. The outlet of oil pump 3 and the inlet of oil cooler 4 are connected through the second lubricating oil passage 14. The second receiving cavity 121 is connected to the second lubricating oil passage 14. The outlet of oil cooler 4 and the first receiving cavity 111 are connected through the third lubricating oil passage 15. The lubricating oil flows into the inlet of oil cooler 4 and the second receiving cavity 121 after passing through the inlet 16, the suction filter 2, the first lubricating oil passage 13, the oil pump 3, and the second lubricating oil passage 14.

[0034] Specifically, the housing 1 has a first receiving cavity 111 and a second receiving cavity 121 inside. The motor and reducer of the drive system are respectively installed in the first receiving cavity 111 and the second receiving cavity 121 of the housing 1 to achieve an integrated design of the drive system. Moreover, the cavity wall of the first receiving cavity 111 facing the second receiving cavity 121 and the cavity wall of the second receiving cavity 121 facing the first receiving cavity 111 are at least partially shared, that is, the first receiving cavity 111 and the second receiving cavity 121 are arranged adjacent to each other along the axial direction of the motor shaft 520. In addition, the suction filter 2 and the oil pump 3 can be installed at the bottom end of the housing 1 to facilitate the oil pump 3 to draw the lubricating oil at the bottom of the housing 1 into the suction filter 2 for filtration. The oil cooler 4 can be installed on the top outside of the housing 1 to facilitate the lubricating oil cooled by the oil cooler 4 to flow into the first receiving cavity 111 and then spray downward or obliquely downward onto the stator 510 of the motor to cool and lubricate the motor with high heat generation.

[0035] More specifically, the shell wall of the housing 1 is provided with a first lubricating oil passage 13, a second lubricating oil passage 14, a third lubricating oil passage 15, and an oil inlet 16. The oil inlet 16 is connected to the liquid inlet of the suction filter 2, and the oil inlet 16 can be disposed through the cavity wall of the second receiving cavity 121 facing the first receiving cavity 111, so as to connect the liquid inlet of the suction filter 2 with the second receiving cavity 121, so that the lubricating oil flowing back to the bottom of the housing 1 can be drawn into the suction filter 2 through the oil inlet 16. Alternatively, the oil inlet 16 can be disposed on the shell wall of the housing 1, so as to connect the liquid inlet of the suction filter 2 with the external space of the housing 1. In this case, the lubricating oil outside the housing 1 can be transported from the oil inlet 16 to the lubricating oil passage on the housing 1. The cavity wall of the second receiving cavity 121 with the oil inlet 16 can be a cavity wall shared with the first receiving cavity 111, or it can be a cavity wall not shared with the first receiving cavity 111, which is not specifically limited here. The first lubrication circuit 13 connects the outlet of the suction filter 2 and the inlet of the oil pump 3, for example... Figure 3As shown, in one example, the first lubricating oil passage 13 is a channel structure on the shell wall of the housing 1. The end of the suction filter 2 with the liquid outlet is inserted into the first lubricating oil passage 13 and forms a sealed connection with the cavity wall of the first lubricating oil passage 13 through, for example, a sealing ring. The end of the oil pump 3 with the liquid inlet is also inserted into the first lubricating oil passage 13 and forms a sealed connection with the cavity wall of the first lubricating oil passage 13 through, for example, a sealing ring. The end of the suction filter 2 with the liquid outlet and the end of the oil pump 3 with the liquid inlet are spaced apart in the first lubricating oil passage 13, so that the liquid outlet of the suction filter 2 and the liquid inlet of the oil pump 3 are connected through the first lubricating oil passage 13, thereby allowing the lubricating oil filtered by the suction filter 2 to be sucked into the oil pump 3 through the first lubricating oil passage 13. The third lubricating oil passage 15 is disposed on the cavity wall of the first receiving cavity 111. The extension path of the second lubricating oil passage 14 passes through the cavity wall of the first receiving cavity 111, the common cavity wall of the first receiving cavity 111 and the second receiving cavity 121, and the cavity wall of the second receiving cavity 121. Simultaneously, the outlet of the oil pump 3 and the inlet of the oil cooler 4 are connected through the second lubricating oil passage 14. The second receiving cavity 121 is connected to the second lubricating oil passage 14. The outlet of the oil cooler 4 and the first receiving cavity 111 are connected through the third lubricating oil passage 15. This allows lubricating oil to sequentially flow through the inlet 16, the suction filter 2, the first lubricating oil passage 13, the oil pump 3, and the second lubricating oil passage 14 into the inlet of the oil cooler 4 and the second receiving cavity 121, respectively. For example... Figure 4 The red arrows indicate the flow path of the lubricating oil. That is, the lubricating oil is split through the second lubricating oil passage 14. Part of it is cooled by the oil cooler 4 and then flows into the first receiving cavity 111 through the third lubricating oil passage 15 to cool and lubricate the motor. The other part flows into the second receiving cavity 121 to lubricate the reducer.

[0036] In this embodiment, the integrated design of the drive system can be achieved by providing a first receiving cavity 111 for accommodating the motor and a second receiving cavity 121 for accommodating the reducer within the housing 1. Simultaneously, a first lubricating oil passage 13, a second lubricating oil passage 14, a third lubricating oil passage 15, and an oil inlet 16 are provided on the housing wall of the housing 1. The inlet of the suction filter 2 is connected to the oil inlet 16, the outlet of the suction filter 2 and the inlet of the oil pump 3 are connected through the first lubricating oil passage 13, and the outlet of the oil pump 3 and the inlet of the oil cooler 4 are connected through the second lubricating oil passage 14. The second receiving cavity 121 is connected to the second lubricating oil passage 14, and the oil outlet of the oil cooler 4 and the first receiving cavity 111 are connected through the third lubricating oil passage 15. This allows the lubricating oil to be diverted sequentially through the oil inlet 16, the suction filter 2, the first lubricating oil passage 13, the oil pump 3, and the second lubricating oil passage 14. A portion of the lubricating oil, after being cooled by the oil cooler 4, flows into the first receiving cavity 111 through the third lubricating oil passage 15 to cool and lubricate the motor, which generates a large amount of heat. The other portion of the lubricating oil flows into the second receiving cavity 121 to lubricate the reducer, which generates less heat. In this way, the oil pump 3 can increase the pressure to improve the flow and circulation efficiency of the lubricating oil, and the second lubricating oil passage 14 can replace the low-pressure oil pipe in related technologies. This not only reduces the length of the lubricating oil passage and reduces pressure loss, but also reduces the number of parts and assembly processes, thereby reducing the failure rate of the lubricating oil passage, material and management costs. Furthermore, by arranging the lubrication oil passages on the shell wall of housing 1, the space occupied by the lubrication oil passages and the failure rate can be reduced, thereby lowering the overall volume of the integrated drive system and facilitating its placement on the vehicle. Additionally, by diverting the lubricating oil through the second lubrication oil passage 14 into the oil cooler 4 and the second receiving cavity 121, the lubricating oil used to lubricate the reducer does not need to pass through the oil cooler 4. This avoids increased oil resistance due to increased viscosity and reduced fluidity after cooling, further reducing oil passage resistance and pressure loss in the lubrication system. In summary, the drive lubrication system provided in this embodiment can improve the lubrication effect on the motor and transmission components in the electric drive system while reducing the space occupied by the lubrication oil passages.

[0037] Optionally, combined Figure 1 and Figure 7 As shown, the oil inlet 16 is located below the first receiving cavity 111 and extends through the lower part of the cavity wall of the second receiving cavity 121 facing the first receiving cavity 111, and the oil inlet 16 communicates with the second receiving cavity 121.

[0038] In this optional embodiment, since the suction filter 2 and the oil pump 3 are usually located on the side of the lower part of the first receiving cavity 111 or below the first receiving cavity 111, and the oil cooler 4 is usually located on the side of the upper part of the first receiving cavity 111 or above the first receiving cavity 111, by setting the oil inlet 16 below the first receiving cavity 111 and penetrating the lower part of the cavity wall of the second receiving cavity 121 facing the first receiving cavity 111, the oil inlet 16 is located at the bottom of the second receiving cavity 121, and the oil inlet 16 is connected to the second receiving cavity 121, so that the lubricating oil flowing back to the second receiving cavity 121 can be sucked into the suction filter 2 again under the action of the oil pump 3 to achieve recycling.

[0039] Optionally, combined Figure 3 As shown, the first lubrication passage 13 is designed to extend axially along the first receiving cavity 111. This reduces the oil resistance as lubricating oil flows from the suction filter 2 into the oil pump 3, thereby improving the lubrication effect.

[0040] Optionally, combined Figure 1 As shown, the third lubrication oil passage 15 is arranged to extend radially along the first receiving cavity 111. In this way, not only can the oil resistance of lubricating oil flowing from the oil cooler 4 to the first receiving cavity 111 be reduced, thus improving the lubrication effect, but the lubricating oil flowing into the first receiving cavity 111 through the third lubrication oil passage 15 can also be sprayed onto the stator 510 of the motor in a roughly radial direction for lubrication and cooling, thereby improving the lubrication and cooling effect.

[0041] Optionally, combined Figure 1 and Figure 2 As shown, the housing 1 includes a first housing part 11, an intermediate housing part 12, and a second housing part arranged sequentially along the axial direction of the first receiving cavity 111. The first housing part 11 and the intermediate housing part 12 form the first receiving cavity 111, and the second housing part and the intermediate housing part 12 form the second receiving cavity 121. The second lubricating oil passage 14 includes a first oil passage 141, a second oil passage 142, and a third oil passage 143 connected in sequence. The first lubricating oil passage 13, the first oil passage 141, the third oil passage 143, and the third lubricating oil passage 15 are provided on the first housing part 11. The oil inlet 16 and the second oil passage 142 are provided on the intermediate housing part 12. The outlet of the oil pump 3 is connected to the first oil passage 141, the oil inlet of the oil cooler 4 is connected to the third oil passage 143, and the second receiving cavity 121 is connected to the second oil passage 142.

[0042] It should be noted that the shape of the first receiving cavity 111 is similar to that of the motor, both being cylindrical structures. Therefore, the axial direction of the first receiving cavity 111 is also the axial direction of the motor, and the radial direction of the first receiving cavity 111 is also the radial direction of the motor. That is, the setting direction can also be parallel to the axial direction of the motor.

[0043] The housing 1 is divided into three parts: a first housing part 11, a middle housing part 12, and a second housing part (not shown in the figure). When the housing 1 is a one-piece structure, the connection between the first housing part 11, the middle housing part 12, and the second housing part is an integral connection. In this case, the housing 1 is manufactured using a casting process to improve the production efficiency of the housing 1 and reduce the number of parts. When the housing 1 is a split structure, the housing 1 can be designed as a three-segment split structure, that is, the first housing part 11, the middle housing part 12, and the second housing part are detachably connected sequentially along the axial direction of the motor. Alternatively, the housing 1 can be designed as a two-segment split structure, that is, one of the first housing part 11 and the second housing part is designed as an integral part with the middle housing part 12. This simplifies the structure of the production mold of the housing 1, thereby reducing the production difficulty and cost of the housing 1.

[0044] In this optional embodiment, the housing 1 is divided into three parts: a first housing part 11, an intermediate housing part 12, and a second housing part (not shown in the figure). The filter 2, oil pump 3, and oil cooler 4 can be mounted on the first housing part 11. The first housing part 11 and the second housing part are cylindrical structures open at both ends. The space enclosed by the first housing part 11 and the intermediate housing part 12 constitutes a first receiving cavity 111, and the space enclosed by the second housing part and the intermediate housing part 12 constitutes a second receiving cavity 121. The intermediate housing part 12 separates the first receiving cavity 111 and the second receiving cavity 121, i.e., the intermediate housing part 12 forms the cavity wall of the second receiving cavity 121 facing the first receiving cavity 111. Thus, designing the housing 1 as a split structure simplifies the structure of the production mold for the housing 1, thereby reducing the production difficulty and cost of the housing 1.

[0045] The extended path passes through the first housing portion 11 and the intermediate housing portion 12, forming a multi-channel structure including a first oil passage 141, a second oil passage 142, and a third oil passage 143. Furthermore, the first oil passage 141 and the third oil passage 143 of the first lubricating oil passage 13, the third lubricating oil passage 15, and the second oil passage 14 are located on the first housing portion 11, while the oil inlet 16 and the second oil passage 142 of the second lubricating oil passage 14 are located on the intermediate housing portion 12. This facilitates segmented machining of the lubricating oil passages on the split-structure housing 1, thereby reducing the machining difficulty of the lubricating oil passages. In addition, the above-mentioned oil circuit arrangement facilitates the connection between the outlet of the oil pump 3 and the first oil passage 141 of the second lubricating oil circuit 14, the oil inlet of the oil cooler 4 and the third oil passage 143 of the second lubricating oil circuit 14, and the second receiving cavity 121 and the second oil passage 142 of the second lubricating oil circuit 14. This allows the lubricating oil flowing into the second lubricating oil circuit 14 to be diverted through the second oil passage 142. Part of the oil flows directly into the second receiving cavity 121, while the other part flows into the third oil passage 143 and then into the first receiving cavity 111 via the oil cooler 4 and the third lubricating oil circuit 15. In this way, the flow of the second lubricating oil circuit 14 is diverted, and the oil circuit length can be shortened as much as possible to reduce oil resistance.

[0046] Furthermore, when the first housing part 11 and the intermediate housing part 12 are separate structures, the first oil passage 141 and the first channel 1421 need to form a sealed connection through the first seal, and / or the third channel 1423 and the third oil passage 143 need to form a sealed connection through the second seal, so as to reduce the risk of oil leakage in the lubrication circuit.

[0047] Optionally, combined Figure 2 and Figure 7 As shown, the second oil passage 142 includes a first channel 1421, a second channel 1422, a third channel 1423, and a fourth channel 1424. The first channel 1421, the second channel 1422, and the third channel 1423 are connected end to end in sequence. The first channel 1421 is connected to the first oil passage 141, the third channel 1423 is connected to the third oil passage 143, and the fourth channel 1424 is connected to the second channel 1422 and the second receiving cavity 121. The first oil passage 141, the first channel 1421, and the third channel 1423 extend along a set direction, and the second channel 1422 extends perpendicular to the set direction, wherein the set direction is parallel to the axial direction of the first receiving cavity 111.

[0048] In this optional embodiment, the second lubrication passage 14 guides lubricating oil along the shell wall of the housing 1 from the bottom to the top of the housing 1, so as to spray lubricating oil downward or obliquely downward in the first receiving cavity 111 and the second receiving cavity 121. The second oil passage 142 of the second lubrication passage 14 includes a first channel 1421, a second channel 1422, and a third channel 1423 that are sequentially connected to and flow into a third oil passage 143. It also includes a fourth channel 1424 that is connected to the second channel 1422 and flows into the second receiving cavity 121, so that the lubricating oil flowing into the second oil passage 142 is diverted after passing through the second channel 1422. Furthermore, the first oil passage 141, the first channel 1421, and the third channel 1423 are all straight channels and are arranged axially parallel to the first receiving cavity 111 to reduce the oil resistance of lubricating oil flowing from the first oil passage 141 into the second oil passage 142 and from the second oil passage 142 into the third oil passage 143. The second channel 1422 can be an arc-shaped channel arranged circumferentially along the first receiving cavity 111, or it can be a zigzag channel formed by connecting multiple straight channels in sequence. The second channel 1422 extends axially perpendicular to the first receiving cavity 111, so as to guide lubricating oil from the bottom of the housing 1 to the top of the housing 1 and distribute it. Figure 7 As shown, the fourth channel 1424 can be a straight channel, which can be connected to the middle part of the second channel 1422, or it can be connected to one end of the second channel 1422 connected to the third channel 1423. In this case, the second channel 1422, the third channel 1423 and the fourth channel 1424 intersect at one place. Moreover, the fourth channel 1424 and the second channel 1422 can be arranged around the motor shaft 520 of the motor and form a U-shaped channel structure. The diverted lubricating oil can flow through the fourth channel 1424 to the second receiving cavity 121, thereby lubricating the reducer.

[0049] Optionally, combined Figure 2As shown, the third oil passage 143 includes a fifth channel 1431 extending along a predetermined direction and a sixth channel 1432 extending perpendicular to the predetermined direction. The fifth channel 1431 communicates with the third channel 1423 of the second oil passage 142, and the sixth channel 1432 communicates with the oil inlet of the oil cooler 4. The fifth channel 1431 corresponds to the axial channel structure on the first housing portion 11, and the sixth channel 1432 corresponds to the radial channel structure on the first housing portion 11. Since the oil inlet and outlet of the oil cooler 4 are located on the bottom surface of the oil cooler 4, when the oil cooler 4 is installed outside the top of the housing 1, the axes of the oil inlet and outlet of the oil cooler 4 are parallel to the radial direction of the cylindrical first receiving cavity 111, i.e., perpendicular to the predetermined direction. Therefore, the fifth channel 1431 is extended along the set direction to reduce the oil resistance of lubricating oil flowing from the second oil passage 142 into the third oil passage 143, and the sixth channel 1432 is extended perpendicular to the set direction to reduce the oil resistance of lubricating oil flowing from the third oil passage 143 into the oil cooler 4.

[0050] Optionally, combined Figure 1 , Figures 5 to 7 As shown, the intermediate housing 12 is provided with a bearing mounting groove 122, and the inner wall of the second channel 1422 is provided with an oil injection hole 144, which is connected to the bearing mounting groove 122.

[0051] In this optional embodiment, the intermediate housing portion 12 may be provided with multiple bearing mounting slots 122. When one of the bearing mounting slots 122 is used to install the support bearing 600 of the motor shaft 520 in the motor, the bearing mounting slot 122 is connected to the first receiving cavity 111 and the second receiving cavity 121. When one of the bearing mounting slots 122 is used to install the support bearing 600 of the output shaft in the reducer, the bearing mounting slot 122 is not connected to the first receiving cavity 111 and the second receiving cavity 121. Correspondingly, the inner wall of the second channel 1422 may be provided with multiple oil spray holes 144. The multiple oil spray holes 144 are respectively connected to the multiple bearing mounting slots 122, and a portion of the oil spray holes 144 extend to the bearing of the motor shaft 520 to spray lubricating oil onto the support bearing 600 of the motor, and another portion of the oil spray holes 144 extend to the bearing of the output shaft of the reducer to spray lubricating oil onto the support bearing 600 of the reducer. In this way, lubrication of the support bearing 600 of the motor and / or the reducer is achieved.

[0052] Furthermore, combined Figures 6 to 9As shown, the fourth channel 1424 includes a first groove segment 1424a, a second groove segment 1424b, and a third groove segment 1424c connected in sequence. The first groove segment 1424a, the second channel 1422, and the third channel 1423 converge at one point. The third groove segment 1424c communicates with the second receiving cavity 121 and is used to spray lubricating oil onto the reduction gear 700 of the reducer. In this way, the lubricating oil can be guided to the reduction gear 700 through the fourth channel 1424, thereby achieving lubrication of the reducer.

[0053] Optionally, combined Figure 5 As shown, the bottom of the housing 1 is also provided with a first mounting cavity 17 for mounting the suction filter 2. Lubricating oil enters the suction filter 2 sequentially through the oil inlet 16, the first mounting cavity 17, and the liquid inlet of the suction filter 2. The first mounting cavity 17 can be formed by the first housing portion 11 and the intermediate housing portion 12. The oil inlet 16 and the liquid inlet of the suction filter 2 are connected through the first mounting cavity 17. In this way, the first mounting cavity 17 can be used both to mount the suction filter 2 and as a connecting channel to connect the oil inlet 16 and the liquid inlet of the suction filter 2, thereby further simplifying the lubrication circuit of the integrated drive system and reducing the overall size of the integrated drive system.

[0054] Optionally, combined Figure 2 and Figure 3 As shown, the housing 1 is also provided with a second mounting cavity 18 for mounting the oil pump 3. The cavity wall of the second mounting cavity 18 is provided with an oil outlet 181. The gap between the cavity wall of the second mounting cavity 18 and the oil pump 3 forms a fourth oil passage 19. The outlet of the oil pump 3 is connected to the fourth oil passage 19. The fourth oil passage 19 is connected to the second lubricating oil passage 14 through the oil outlet 181. The lubricating oil in the oil pump 3 flows into the second lubricating oil passage 14 in sequence through the fourth oil passage 19 and the oil outlet 181.

[0055] In this optional embodiment, the second mounting cavity 18 is a cylindrical cavity structure. One axial end of the second mounting cavity 18 is open for the insertion and installation of the oil pump 3. The other axial end of the second mounting cavity 18 is connected to the first lubricating oil passage 13, so that the oil inlet located at the axial end of the oil pump 3 can be connected to the first lubricating oil passage 13 after being inserted into the second mounting cavity 18. There is a gap between the cavity wall of the second mounting cavity 18 and the oil pump 3, and this gap forms a fourth oil passage 19. At the same time, the cavity wall of the second mounting cavity 18 is provided with an oil outlet 181. The fourth oil passage 19 is connected to the first oil passage 141 of the second lubricating oil passage 14 through the oil outlet 181. In this way, the lubricating oil drawn into the oil pump 3 can flow into the second lubricating oil passage 14 in sequence through the fourth oil passage 19 and the oil outlet 181, and then be distributed to the motor and reducer for lubrication.

[0056] This utility model provides a vehicle including the drive lubrication system described above.

[0057] In this embodiment, the vehicle also includes a motor and a reducer constituting the drive system. The motor is installed in the first receiving cavity 111 of the housing 1, and the reducer is installed in the second receiving cavity 121 of the housing 1. The lubricating oil is sequentially diverted through the oil inlet 16, the suction filter 2, the first lubricating oil passage 13, the oil pump 3, and the second lubricating oil passage 14. A portion of the lubricating oil is cooled by the oil cooler 4 and then flows into the first receiving cavity 111 through the third lubricating oil passage 15 to cool and lubricate the motor, which generates a large amount of heat. The other portion of the lubricating oil flows into the second receiving cavity 121 to lubricate the reducer, which generates less heat. Furthermore, the beneficial effects of the vehicle in this embodiment are the same as those of the drive lubrication system described above, and will not be repeated here.

[0058] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

Claims

1. A drive lubrication system characterized in that, The application relates to a lubricating oil circuit for an electric motor, comprising a shell (1) and a suction filter (2), an oil pump (3) and an oil cooler (4) mounted on the shell (1), wherein the shell (1) is provided with a first accommodating cavity (111) for accommodating an electric motor and a second accommodating cavity (121) for accommodating a speed reducer, a shell wall of the shell (1) is provided with a first lubricating oil path (13), a second lubricating oil path (14), a third lubricating oil path (15) and an oil inlet (16), a liquid inlet of the suction filter (2) is communicated with the oil inlet (16), a liquid outlet of the suction filter (2) and a liquid inlet of the oil pump (3) are communicated through the first lubricating oil path (13), a liquid outlet of the oil pump (3) and an oil inlet hole of the oil cooler (4) are communicated through the second lubricating oil path (14), the second accommodating cavity (121) is communicated with the second lubricating oil path (14), an oil outlet hole of the oil cooler (4) and the first accommodating cavity (111) are communicated through the third lubricating oil path (15), and lubricating oil flows into the oil inlet hole of the oil cooler (4) and the second accommodating cavity (121) in sequence through the oil inlet (16), the suction filter (2), the first lubricating oil path (13), the oil pump (3) and the second lubricating oil path (14).

2. The drive lubrication system of claim 1, wherein, The oil inlet (16) is located below the first accommodating cavity (111) and penetrates a lower part of a cavity wall of the second accommodating cavity (121) towards the first accommodating cavity (111), and the oil inlet (16) is communicated with the second accommodating cavity (121).

3. The drive lubrication system of claim 1, wherein, The shell (1) comprises a first shell part (11), an intermediate shell part (12) and a second shell part which are sequentially arranged along an axial direction of the first accommodating cavity (111), the first shell part (11) and the intermediate shell part (12) enclose the first accommodating cavity (111), and the second shell part and the intermediate shell part (12) enclose the second accommodating cavity (121); the second lubricating oil path (14) comprises a first oil channel (141), a second oil channel (142) and a third oil channel (143) which are sequentially communicated, the first lubricating oil path (13), the first oil channel (141), the third oil channel (143) and the third lubricating oil path (15) are arranged on the first shell part (11), the oil inlet (16) and the second oil channel (142) are arranged on the intermediate shell part (12), a liquid outlet of the oil pump (3) is communicated with the first oil channel (141), an oil inlet hole of the oil cooler (4) is communicated with the third oil channel (143), and the second accommodating cavity (121) is communicated with the second oil channel (142).

4. The drive lubrication system of claim 3, wherein, The second oil passage (142) comprises a first channel (1421), a second channel (1422), a third channel (1423) and a fourth channel (1424), the first channel (1421), the second channel (1422) and the third channel (1423) are sequentially and continuously communicated, the first channel (1421) is communicated with the first oil passage (141), the third channel (1423) is communicated with the third oil passage (143), the fourth channel (1424) is respectively communicated with the second channel (1422) and the second containing cavity (121), and the first oil passage (141), the first channel (1421) and the third channel (1423) are arranged along a set direction, the second channel (1422) is arranged along a direction perpendicular to the set direction, and the set direction is parallel to the axial direction of the first containing cavity (111).

5. The drive lubrication system of claim 4, wherein, The intermediate housing part (12) is provided with a bearing mounting groove (122), and an oil injection hole (144) is arranged on the inner wall of the second channel (1422), and the oil injection hole (144) is communicated with the bearing mounting groove (122).

6. The drive lubrication system of claim 4, wherein, The third oil passage (143) comprises a fifth channel (1431) arranged along the set direction and a sixth channel (1432) arranged along a direction perpendicular to the set direction, the fifth channel (1431) is communicated with the third channel (1423), and the sixth channel (1432) is communicated with an oil inlet hole of the oil cooler (4).

7. The drive lubrication system of claim 1, wherein, The bottom of the housing (1) is further provided with a first mounting cavity (17) for mounting the suction filter (2), and lubricating oil enters the suction filter (2) through the oil inlet (16), the first mounting cavity (17) and the liquid inlet of the suction filter (2) in sequence.

8. The drive lubrication system of claim 1, wherein, The housing (1) is further provided with a second mounting cavity (18) for mounting the oil pump (3), the cavity wall of the second mounting cavity (18) is provided with an oil outlet (181), the gap between the cavity wall of the second mounting cavity (18) and the oil pump (3) forms a fourth oil passage (19), the liquid outlet of the oil pump (3) is communicated with the fourth oil passage (19), the fourth oil passage (19) is communicated with the second lubricating oil passage (14) through the oil outlet (181), and the lubricating oil in the oil pump (3) flows into the second lubricating oil passage (14) through the fourth oil passage (19) and the oil outlet (181) in sequence.

9. The drive lubrication system of claim 1, wherein, The first lubricating oil passage (13) is arranged along the axial direction of the first containing cavity (111), and / or the third lubricating oil passage (15) is arranged along the radial direction of the first containing cavity (111).

10. A vehicle characterized by comprising: A drive lubrication system comprising a lubrication system according to any one of claims 1-9. A drive lubrication system comprising a lubrication system according to any one of claims 1-9.

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