Motors, vehicles

Abstract

The present application provides a motor and a vehicle, characterized in that they include a first end cover, a second end cover, a cooling oil circuit and an oil pump; the cooling oil circuit includes at least a first oil circuit and a second oil circuit, the first oil circuit and the second oil circuit are located between the first end cover and the second end cover; the oil pump is connected to the first oil circuit and the second oil circuit to pump oil into the first oil circuit and the second oil circuit. A motor and a vehicle provided in an embodiment of the present application can prevent dry wear damage in the motor caused by insufficient lubricating oil supply when the motor is running at a low speed with low centrifugal force or low system pressure.

Description

Technical Field

[0001] The present application belongs to the field of motor technology, and specifically relates to a motor and a vehicle. Background Art

[0002] In recent years, the new energy vehicle drive motor industry has developed rapidly. With the stringent requirements on power density, the speed of the motor is getting higher and higher. In the existing technology, the cooling oil needs to rely on the centrifugal force of the motor rotation to be thrown to the front bearing, but when the oil system pressure is insufficient or the motor is at a low speed, the bearing will have insufficient oil supply, and there will be a risk of dry grinding. Summary of the invention

[0003] Therefore, the technical problem to be solved by the present application is to provide a motor and a vehicle that can prevent dry wear damage in the motor caused by insufficient lubricating oil supply when the motor runs at a low speed with small centrifugal force or low system pressure.

[0004] In order to solve the above problems, the present application provides a motor, including a first end cover, a second end cover, a cooling oil circuit and an oil pump part;

[0005] The cooling oil circuit at least includes a first oil circuit and a second oil circuit, wherein the first oil circuit and the second oil circuit are located between the first end cover and the second end cover;

[0006] The oil pumping unit is in communication with the first oil passage and the second oil passage to pump oil into the first oil passage and the second oil passage.

[0007] Preferably, the motor further comprises a drive assembly, at least a portion of the first oil circuit is located between the first end cover and the drive assembly, and at least a portion of the second oil circuit is located between the second end cover and the drive assembly.

[0008] Preferably, the cross-section of the first end cover decreases along the direction toward the second end cover to form a first oil guide surface on the side wall of the first end cover, and the first oil guide surface is located in the first oil circuit. The motor also includes a first bearing, and the first bearing is located on the downstream side of the first guide surface along the first oil circuit.

[0009] Preferably, a plurality of first oil-blocking ribs are provided on the first end cover, the plurality of first oil-blocking ribs are circumferentially arranged on the first oil guide surface, and the first oil-blocking ribs extend in a radial direction of the first end cover.

[0010] Preferably, the motor includes a rotating shaft and a baffle, the baffle is sleeved on the rotating shaft, the baffle is located between the first end cover and the driving assembly, the first bearing is located between the baffle and the first end cover, and there is a gap between the first end cover and the baffle, the gap is part of the first oil circuit, the gap is connected to the space where the first bearing is located, and the oil on the first oil guide surface can flow into the space where the first bearing is located through the gap.

[0011] Preferably, a limiting boss is provided on the baffle, the limiting boss is provided along the circumference of the rotating shaft, the limiting boss comprises an oil inlet and an oil outlet, and the oil inlet and the oil outlet are located in the first oil circuit.

[0012] Preferably, an oil-blocking boss is provided on the baffle plate, and the oil-blocking boss is located on the downstream side of the first oil-conducting surface along the first oil passage, so as to block the oil flowing through the first oil-conducting surface into the gap.

[0013] Preferably, the cross-section of the second end cover decreases along the direction toward the first end cover to form a second oil guide surface on the side wall of the second end cover, and the second oil guide surface is located in the second oil circuit. The motor also includes a second bearing, and the second bearing is located on the downstream side of the second guide surface along the second oil circuit.

[0014] Preferably, a plurality of second oil-blocking ribs are provided on the second end cover, the plurality of second oil-blocking ribs are circumferentially arranged on the second oil guide surface, and the second oil-blocking ribs extend in the radial direction of the second end cover.

[0015] Preferably, the motor includes a rotating shaft, on which a guide portion is provided, and the cross-section of the guide portion decreases in the direction toward the second bearing to form a third oil guide surface on the side wall of the guide portion, and the third oil guide surface is located in the second oil circuit to guide the oil to the second bearing.

[0016] Preferably, the motor further comprises a rotating shaft, a first winding and a second winding, the first winding and the second winding are wound in a circumferential direction of the rotating shaft, the first winding is located in the first oil circuit, and the second winding is located in the second oil circuit.

[0017] Preferably, the cooling oil circuit also includes a main oil circuit, the oil outlet end of the first oil circuit and the oil outlet end of the second oil circuit are connected to the oil inlet end of the main oil circuit, the oil inlet end of the first oil circuit and the oil inlet end of the second oil circuit are connected to the oil outlet end of the main oil circuit, the oil pumping part includes an oil pump, and the main oil circuit is sequentially provided with an oil tank, a first filter, the oil pump, a second filter and a heat exchanger from the oil inlet end of the main oil circuit to the oil outlet end of the main oil circuit.

[0018] Preferably, the heat exchanger comprises a cooling channel, in which a coolant flows, and the coolant can exchange heat with oil flowing through the heat exchanger.

[0019] Another aspect of the present invention provides a vehicle, comprising the motor as described above.

[0020] Beneficial Effects

[0021] A motor and a vehicle provided in the embodiments of the present invention can prevent dry wear damage in the motor caused by insufficient lubricating oil supply when the motor runs at a low speed with low centrifugal force or low system pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A cross-sectional view of an embodiment of the present application;

[0023] Figure 2 A cross-sectional view of a first end cover of an embodiment of the present application;

[0024] Figure 3 A cross-sectional view of the second end cover of an embodiment of the present application;

[0025] Figure 4 This is a schematic diagram of the structure of the baffle in an embodiment of the present application;

[0026] Figure 5 This is a schematic diagram of the structure of the rotating shaft of an embodiment of the present application;

[0027] Figure 6 This is a schematic diagram of the structure of the first end cover of an embodiment of the present application;

[0028] Figure 7 This is a schematic diagram of the structure of the second end cover of an embodiment of the present application;

[0029] Figure 8 This is a system schematic diagram of an embodiment of the present application.

[0030] The reference numerals are as follows:

[0031] 1. First end cover; 2. Second end cover; 3. First oil circuit; 4. Second oil circuit; 5. Drive assembly; 6. First oil guide surface; 7. Second oil guide surface; 8. Third oil guide surface; 9. First oil baffle; 10. Second oil baffle; 11. Rotating shaft; 12. Gap; 13. First bearing; 14. Second bearing; 15. Baffle; 16. Limiting boss; 17. Oil inlet; 18. Oil outlet; 19. Oil baffle; 20. First winding; 21. Second winding; 22. Oil seal; 23. Main oil circuit; 24. Oil tank; 25. First filter; 26. Oil pump; 27. Second filter; 28. Heat exchanger; 29. ​​Cooling channel. DETAILED DESCRIPTION

[0032] See also Figures 1 to 8 As shown, Figure 1-3 The middle arrow represents the direction of oil flow. According to an embodiment of the present application, a motor includes a first end cover 1, a second end cover 2, a cooling oil circuit and an oil pumping unit; the cooling oil circuit includes at least a first oil circuit 3 and a second oil circuit 4, and the first oil circuit 3 and the second oil circuit 4 are located between the first end cover 1 and the second end cover 2; the oil pumping unit is connected to the first oil circuit 3 and the second oil circuit 4 to pump oil into the first oil circuit 3 and the second oil circuit 4. By arranging the first oil circuit 3 and the second oil circuit 4 between the first end cover 1 and the second end cover 2, and by arranging the oil pumping unit, the oil supply is guaranteed when the motor runs at a low speed with low centrifugal force or low system pressure, thereby avoiding dry wear damage in the motor.

[0033] Furthermore, in this embodiment, the first end cover 1 is a front end cover of the motor, and the second end cover 2 is a rear end cover of the motor.

[0034] Furthermore, the oil pumping unit is used to pump oil into the first oil circuit 3 and the second oil circuit 4 .

[0035] Furthermore, the oil pumping unit can pump oil into the first oil passage 3 and the second oil passage 4 to form a circulation.

[0036] Furthermore, the oil inlet 17 of the first oil circuit 3 and the oil inlet 17 of the second oil circuit 4 are located at the upper part of the motor, and the oil outlet 18 of the first oil circuit 3 and the oil outlet 18 of the second oil circuit 4 are located at the lower part of the motor. The oil entering the first oil circuit 3 and the second oil circuit 4 can supply oil to the components in the motor along the wall surface by its own gravity and viscosity, without increasing the power of the oil pumping part.

[0037] The motor further includes a drive assembly 5 , at least a portion of the first oil circuit 3 is located between the first end cover 1 and the drive assembly 5 , and at least a portion of the second oil circuit 4 is located between the second end cover 2 and the drive assembly 5 .

[0038] Furthermore, in this embodiment, the driving assembly 5 is a stator and a rotor, which is used to drive the rotating shaft 11 to rotate.

[0039] Furthermore, the parts that need lubrication and cooling in the motor are mostly concentrated between the first end cover 1 and the drive assembly 5 and between the second end cover 2 and the drive assembly 5. At least a part of the first oil circuit 3 is located between the first end cover 1 and the drive assembly 5, and at least a part of the second oil circuit 4 is located between the second end cover 2 and the drive assembly 5, thereby ensuring that the parts to be lubricated and cooled are fully lubricated and cooled.

[0040] The cross section of the first end cover 1 decreases gradually in the direction toward the second end cover 2, so as to form a first oil guide surface 6 on the side wall of the first end cover 1, and the first oil guide surface 6 is located on the first oil path 3. The motor further comprises a first bearing 13, and the first bearing 13 is located on the downstream side of the first guide surface along the first oil path 3. By providing the first oil guide surface 6, the oil in the first oil path 3 can be guided to the first bearing 13, thereby effectively ensuring the lubrication and cooling of the first bearing 13.

[0041] Further, such as Figure 1 As shown, the cross section of the first end cover 1 decreases from right to left.

[0042] Furthermore, the cross section of the first end cover 1 is the axial section passing through the symmetry axis of the first end cover 1, such as Figure 1 The cross section in is a vertical plane passing through the symmetry axis of the first end cover 1.

[0043] Furthermore, the first oil guiding surface 6 is a curved surface.

[0044] Specifically, in this embodiment, the first oil guiding surface 6 is a concave arc surface.

[0045] Furthermore, the first bearing 13 is located below the first oil guide surface 6 .

[0046] The first end cover 1 is provided with a plurality of first oil baffle ribs 9, which are arranged circumferentially on the first oil guide surface 6, and extend radially along the first end cover 1. By providing the first oil baffle ribs 9, the oil on the first oil guide surface 6 can be gathered and collected.

[0047] Furthermore, in the present embodiment, the number of the first oil-blocking ribs 9 is 8, and the 8 first oil-blocking ribs 9 are evenly arranged on the first oil-guiding surface 6 along the circumferential direction.

[0048] The motor includes a rotating shaft 11, a baffle 15 and a first bearing 13. The baffle 15 is sleeved on the rotating shaft 11. The baffle 15 is located between the first end cover 1 and the driving assembly 5. The first bearing 13 is located between the baffle 15 and the first end cover 1. There is a gap 12 between the first end cover 1 and the baffle 15. The gap 12 is a part of the first oil circuit 3. The gap 12 is connected to the space where the first bearing 13 is located. The oil on the first oil guide surface 6 can flow into the space where the first bearing 13 is located through the gap 12. By arranging the first bearing 13 on the first oil circuit 3, it is possible to ensure sufficient lubrication and cooling of the bearing, solve the problem of little or no oil entering the first bearing 13 during low-speed operation, and eliminate the risk of dry grinding of the first bearing 13. By arranging the baffle 15, and making the baffle 15 located between the bearing and the driving assembly 5, and having a gap 12 between the baffle 15 and the first end cover 1, it is possible to guide the oil so that the oil enters the space where the first bearing 13 is located.

[0049] Furthermore, the first bearing 13 is a front bearing, and the first bearing 13 is sleeved on the rotating shaft 11 .

[0050] The baffle 15 is provided with a limiting boss 16, which is arranged along the circumference of the rotating shaft 11. The limiting boss 16 includes an oil inlet 17 and an oil outlet 18, and the oil inlet 17 and the oil outlet 18 are located on the first oil path 3. By providing the limiting boss 16, it is ensured that the oil can only enter from the oil inlet 17 and be discharged from the oil outlet 18 to prevent the oil from splashing. By providing the oil inlet 17 and the oil outlet 18, it is ensured that the oil can enter the space where the first bearing 13 is located, and it is ensured that the oil can be smoothly discharged from the space.

[0051] Furthermore, the baffle 15 is inserted into the space where the first bearing 13 is located through the limiting boss 16 .

[0052] Furthermore, the oil inlet 17 is located directly below the highest point of the first oil guide surface 6, and the oil inlet 17 is located above the oil discharge port 18, ensuring that the oil can enter the space where the first bearing 13 is located and ensure that the oil can be smoothly discharged from the space.

[0053] Furthermore, the oil inlet 17 and the oil outlet 18 divide the limiting boss 16 into two arc sections, and the two arc sections are symmetrically arranged with the central axis of the rotating shaft 11 as the symmetry axis.

[0054] The baffle plate 15 is provided with an oil blocking boss 19, which is located on the downstream side of the first oil guide surface 6 along the first oil path 3 to block the oil flowing through the first oil guide surface 6 into the gap 12. By providing the limiting boss 16, the oil discharged from the first oil guide surface 6 can be diverted, further ensuring that the oil can enter the space where the first bearing 13 is located, thereby ensuring the cooling and lubrication of the first bearing 13.

[0055] Furthermore, in this embodiment, the oil blocking boss 19 is located at the top of the baffle 15 and is higher than the highest point of the oil discharge end of the first guide surface, which can ensure that the oil discharged from the first oil guide surface 6 is blocked by the baffle 15 and the oil can enter the gap 12.

[0056] Furthermore, in this embodiment, the end of the oil retaining boss 19 away from the rotating shaft 11 is substantially rectangular.

[0057] Furthermore, the motor also includes an oil seal 22 , which is located on the first oil passage 3 .

[0058] The cross section of the second end cover 2 decreases gradually in the direction toward the first end cover 1, so as to form a second oil guide surface 7 on the side wall of the second end cover 2, and the second oil guide surface 7 is located on the second oil path 4. The motor further includes a second bearing 14, and the second bearing 14 is located on the downstream side of the second guide surface along the second oil path 4. By providing the second oil guide surface 7, the oil in the second oil path 4 can be guided to ensure smooth flow of the oil.

[0059] Further, such as Figure 1 As shown, the cross section of the second end cover 2 decreases from left to right.

[0060] Furthermore, the cross section of the second end cover 2 is the axial cross section passing through the symmetry axis of the second end cover 2. Figure 1 The cross section in is a vertical plane passing through the symmetry axis of the second end cover 2.

[0061] Furthermore, the second oil guiding surface 7 is a curved surface.

[0062] Specifically, in this embodiment, the second oil guiding surface 7 is a concave arc surface.

[0063] Furthermore, the second bearing 14 is located below the second oil guide surface 7 .

[0064] The second end cover 2 is provided with a plurality of second oil baffle ribs 10, which are arranged circumferentially on the second oil guide surface 7, and extend radially along the second end cover 2. The second oil baffle ribs 10 can be provided to collect the oil on the second oil guide surface 7.

[0065] Furthermore, in this embodiment, the number of the second oil-blocking ribs 10 is 8, and the 8 first oil-blocking ribs 9 are arranged on the first oil-guiding surface 6 along the circumferential direction.

[0066] The motor includes a rotating shaft 11, and a guide portion is provided on the rotating shaft 11. The cross section of the guide portion decreases along the direction toward the second bearing 14, so as to form a third oil guide surface 8 on the side wall of the guide portion. The third oil guide surface 8 is located on the second oil circuit 4 to guide the oil to the second bearing 14. By providing the third oil guide surface 8, the oil in the second oil circuit 4 can be guided to the second bearing 14, thereby effectively ensuring the lubrication and cooling of the second bearing 14.

[0067] Furthermore, the second bearing 14 is located on the downstream side of the third oil guide surface 8 along the flow direction of the oil in the second oil passage 4 .

[0068] Further, such as Figure 1 As shown, the cross-section of the guide portion decreases from right to left.

[0069] Furthermore, the central axis of the guide portion coincides with the central axis of the rotating shaft 11 .

[0070] Furthermore, the third oil guiding surface 8 is a concave arc surface.

[0071] The motor also includes a rotating shaft 11, a first winding 20 and a second winding 21. The first winding 20 and the second winding 21 are wound in the circumferential direction of the rotating shaft 11. The first winding 20 is located on the first oil circuit 3, and the second winding 21 is located on the second oil circuit 4, which can ensure that the first winding 20 and the second winding 21 are fully cooled.

[0072] Furthermore, the first winding 20 is a front winding, and the second winding 21 is a rear winding.

[0073] The cooling oil circuit also includes a main oil circuit 23, the oil outlet of the first oil circuit 3 and the oil outlet of the second oil circuit 4 are connected to the oil inlet of the main oil circuit 23, the oil inlet of the first oil circuit 3 and the oil inlet of the second oil circuit 4 are connected to the oil outlet of the main oil circuit 23, the oil pumping unit includes an oil pump 26, and the main oil circuit 23 is provided with an oil tank 24, a first filter 25, an oil pump 26, a second filter 27 and a heat exchanger 28 in sequence from the oil inlet of the main oil circuit 23 to the oil outlet of the main oil circuit 23. By providing the main oil circuit 23 and connecting the main oil circuit 23 with the first oil circuit 3 and the second oil circuit 4, the cooling oil circuit forms a cycle. By providing the oil tank 24, a storage space is provided for the oil. By providing the first filter 25 and the second filter 27, impurities in the oil can be removed to ensure the purity of the oil. By providing the oil pump 26, power is provided for the flow of the oil in the oil circuit. By providing the heat exchanger 28, the oil can be quickly cooled to ensure that the internal components of the motor are effectively cooled.

[0074] Furthermore, the first filter 25 is a filter screen, and the second filter 27 is an oil filter.

[0075] Furthermore, the first oil circuit 3 and the second oil circuit 4 are arranged in parallel and are connected to the main oil circuit 23 at the same time.

[0076] The heat exchanger 28 includes a cooling channel 29, and a coolant flows through the cooling channel 29, and the coolant can exchange heat with the oil flowing through the heat exchanger 28. By providing the cooling channel 29 in the heat exchanger 28 and passing the coolant into the cooling channel 29, the oil can be quickly cooled, ensuring that the internal components of the motor are effectively cooled.

[0077] In another aspect of the present embodiment, a vehicle is provided, comprising the motor as described above.

[0078] A motor and a vehicle provided in an embodiment of the present invention rely on the gravity and viscosity of the oil itself to supply oil to components that need cooling and lubrication, and are independent of the motor's rotational speed and the pressure of the oil system. When the motor runs at a low speed with low centrifugal force or low system pressure, it can prevent dry wear damage in the motor caused by insufficient lubricating oil supply, and there is no need to increase the power of the oil pump 26 in the cooling oil circuit.

[0079] The oil circuit for supplying oil to the first bearing 13 and the second bearing 14 in the motor provided in this embodiment is simple, the parts providing the oil circuit have a simple structure, and the manufacturing cost is low.

[0080] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0081] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. A motor, characterized in that: It comprises a first end cover (1), a second end cover (2), a cooling oil circuit and an oil pump unit; The cooling oil circuit at least comprises a first oil circuit (3) and a second oil circuit (4), wherein the first oil circuit (3) and the second oil circuit (4) are located between the first end cover (1) and the second end cover (2); the oil pumping unit is connected to the first oil circuit (3) and the second oil circuit (4) to pump oil into the first oil circuit (3) and the second oil circuit (4); a first oil guide surface (6) is formed on the side wall of the first end cover (1), wherein the first oil guide surface (6) is located on the first oil circuit (3); the motor further comprises a first bearing (13), wherein the first bearing (13) is located on the downstream side of the first oil guide surface (6) along the first oil circuit (3); The motor further comprises a rotating shaft (11), a baffle (15) and a driving assembly (5) for driving the rotating shaft (11) to rotate, wherein the baffle (15) is sleeved on the rotating shaft (11), the baffle (15) is located between the first end cover (1) and the driving assembly (5), the first bearing (13) is located between the baffle (15) and the first end cover (1), a gap (12) is provided between the first end cover (1) and the baffle (15), the gap (12) is a part of the first oil circuit (3), the gap (12) is connected to a space where the first bearing (13) is located, and the oil on the first oil guide surface (6) can flow into the space where the first bearing (13) is located through the gap (12); A limiting boss (16) is provided on the baffle (15), and the limiting boss (16) is arranged along the circumference of the rotating shaft (11). The limiting boss (16) comprises an oil inlet (17) and an oil outlet (18), and the oil inlet (17) and the oil outlet (18) are located on the first oil circuit (3).

2. The motor according to claim 1, characterized in that At least a portion of the first oil circuit (3) is located between the first end cover (1) and the drive assembly (5), and at least a portion of the second oil circuit (4) is located between the second end cover (2) and the drive assembly (5).

3. The motor according to claim 2, characterized in that The cross section of the first end cover (1) decreases gradually in a direction toward the second end cover (2).

4. The motor according to claim 3, characterized in that A plurality of first oil-blocking ribs (9) are provided on the first end cover (1); the plurality of first oil-blocking ribs (9) are arranged circumferentially on the first oil-guiding surface (6); and the first oil-blocking ribs (9) extend radially of the first end cover (1).

5. The motor according to claim 1, characterized in that The baffle plate (15) is provided with an oil-blocking boss (19), which is located on the downstream side of the first oil-conducting surface (6) along the first oil path (3) so as to block the oil flowing through the first oil-conducting surface (6) into the gap (12).

6. The motor according to claim 2, characterized in that The cross-section of the second end cover (2) decreases in a direction toward the first end cover (1) so as to form a second oil guide surface (7) on the side wall of the second end cover (2), the second oil guide surface (7) being located on the second oil passage (4), the motor further comprising a second bearing (14), the second bearing (14) being located on the downstream side of the second oil guide surface (7) along the second oil passage (4).

7. The motor according to claim 6, characterized in that A plurality of second oil-blocking ribs (10) are provided on the second end cover (2); the plurality of second oil-blocking ribs (10) are arranged circumferentially on the second oil guide surface (7); and the second oil-blocking ribs (10) extend radially of the second end cover (2).

8. The motor according to claim 6, characterized in that The motor comprises a rotating shaft (11), and a guide portion is arranged on the rotating shaft (11). The cross section of the guide portion decreases along the direction toward the second bearing (14), so as to form a third oil guide surface (8) on the side wall of the guide portion. The third oil guide surface (8) is located on the second oil passage (4) to guide the oil to the second bearing (14).

9. The motor according to claim 1, characterized in that The motor further comprises a rotating shaft (11), a first winding (20) and a second winding (21); the first winding (20) and the second winding (21) are wound in a circumferential direction of the rotating shaft (11); the first winding (20) is located on the first oil circuit (3), and the second winding (21) is located on the second oil circuit (4).

10. The motor according to claim 1, characterized in that The cooling oil circuit also includes a main oil circuit (23); the oil outlet end of the first oil circuit (3) and the oil outlet end of the second oil circuit (4) are connected to the oil inlet end of the main oil circuit (23); the oil inlet end of the first oil circuit (3) and the oil inlet end of the second oil circuit (4) are connected to the oil outlet end of the main oil circuit (23); the oil pumping unit includes an oil pump (26); and an oil tank (24), a first filter (25), the oil pump (26), a second filter (27) and a heat exchanger (28) are sequentially arranged on the main oil circuit (23) from the oil inlet end of the main oil circuit (23) to the oil outlet end of the main oil circuit (23).

11. The motor according to claim 10, characterized in that The heat exchanger (28) comprises a cooling channel (29), in which a coolant flows, and the coolant can exchange heat with oil flowing through the heat exchanger (28).

12. A vehicle, characterized in that: Comprising a motor as described in any one of claims 1-11.

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