An oil collection ring, an electric drive assembly, an electric drive assembly, a vehicle

Abstract

This application provides an oil collecting ring, an electric drive assembly, an electric drive system, and a vehicle. The oil collecting ring includes a body and an oil collecting groove formed on the body. The body has a shaft hole for engaging with the electric drive shaft. The oil collecting groove has an oil collecting opening for communicating with the main oil passage of the electric drive housing. The groove wall has a connecting hole for communicating with the bearing lubrication oil passage of the shaft. In use, oil from the main oil passage of the electric drive housing enters the oil collecting groove through the oil collecting opening, and then enters the bearing lubrication oil passage through the connecting hole to lubricate the bearing of the electric drive shaft. In this way, the amount of bearing lubricating oil can be adjusted by changing the number and diameter of the connecting holes. The diameter of the connecting holes can be machined to be very small, so the amount of bearing lubricating oil can be adjusted to a smaller value.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, specifically to an oil collecting ring, an electric drive component, an electric drive assembly, and a vehicle. Background Technology

[0002] Electric drive mechanisms require lubrication and heat dissipation structures. A typical existing lubrication and heat dissipation structure for electric drive mechanisms involves inserting an oil inlet pipe at the end of the electric drive shaft. Oil enters the inlet pipe from the main oil passage on the electric drive housing, then flows into the hollow cavity of the shaft, and finally is shoved from the oil slinger hole onto the bearings and rotor outside the shaft. In this structure, the gap between the outer circumference of the oil inlet pipe and the inner circumference of the shaft needs to be as small as possible; otherwise, oil in the hollow cavity of the shaft will leak out through this gap, resulting in insufficient oil supply. Due to the small gap, the mating positions of the inner circumference of the shaft and the outer circumference of the oil inlet pipe need to be precision machined to ensure high coaxiality and prevent the oil inlet pipe from interfering with the shaft's rotation. This leads to high machining and assembly costs for the electric drive mechanism. In addition, this structure adjusts the oil volume by changing the diameter of the oil slinger or the size of the main oil passage on the housing of the electric drive. When adjusting the oil volume by changing the diameter of the oil slinger, the diameter of the oil slinger cannot be machined to be very small due to the influence of the processing technology. This makes it impossible to adjust the amount of oil slinged to the bearing to be very small. Under the same oil volume, too much oil slinged to the bearing will result in insufficient oil slinged to the rotor, resulting in insufficient heat dissipation of the rotor and affecting the heat dissipation performance of the electric drive mechanism. When adjusting the oil volume by changing the size of the main oil passage on the housing, the housing mold needs to be modified, resulting in high adjustment costs and long adjustment cycles. Summary of the Invention

[0003] One objective of this application is to make the bearing lubricant quantity easy to adjust and adjustable to a smaller value.

[0004] To achieve the above objectives, this application provides an oil collecting ring, which includes a body and an oil collecting groove formed on the body. The body has a shaft hole for engaging with an electric drive shaft, and the oil collecting groove has an oil collecting opening for communicating with the main oil passage of the electric drive housing. The groove wall of the oil collecting groove has a connecting hole for communicating with the bearing lubricating oil passage of the shaft.

[0005] In one embodiment of the oil collecting ring, the oil collecting ring includes an oil distribution groove formed on the body, the connecting hole connects the oil collecting groove and the oil distribution groove, and the oil distribution groove has an oil distribution opening for communicating with the bearing lubricating oil passage and the rotor lubricating oil passage of the rotating shaft.

[0006] In one embodiment of the oil collecting ring, the body includes a first annular plate portion, a first annular cylinder portion, and a second annular plate portion arranged sequentially along the axial direction. The outer diameters of the first annular plate portion and the second annular plate portion are both larger than the outer diameter of the first annular cylinder portion, so as to form the oil collecting groove on the outer side of the first annular cylinder portion and between the first annular plate portion and the second annular plate portion. The inner diameters of the first annular plate portion and the second annular plate portion are both smaller than the inner diameter of the first annular cylinder portion, so as to form the oil separating groove on the inner side of the first annular cylinder portion and between the first annular plate portion and the second annular plate portion. The communicating hole is opened in the first annular cylinder portion.

[0007] In one embodiment of the oil collecting ring, the body includes a second annular cylindrical portion connected to the side of the second annular plate portion away from the first annular cylindrical portion. The second annular cylindrical portion has an inner hole for mounting a conductive ring. The inner diameter of the second annular cylindrical portion is larger than the inner diameter of the second annular plate portion and also larger than the inner diameter of the first annular plate portion.

[0008] In one embodiment of the oil collecting ring, the inner circumferential surface of the second annular cylindrical portion is provided with a first limiting step, which is used to abut against one end face of the conductive ring to axially limit the conductive ring.

[0009] In one embodiment of the oil collecting ring, an anti-misalignment structure is provided on one side of the second annular cylindrical portion, and an oil discharge structure is provided on the side of the second annular cylindrical portion opposite to the anti-misalignment structure. The oil discharge structure penetrates the inner and outer circumferential surfaces of the second annular cylindrical portion.

[0010] This application also provides an electric drive assembly, which includes the oil collecting ring described in any of the above claims.

[0011] One embodiment of an electric drive assembly includes a motor, a bearing, and a first sealing ring. The motor includes a rotor and a shaft. The oil collecting ring and the bearing are both sleeved on the shaft and arranged sequentially along the axial direction. The outer periphery of the shaft is provided with a first sealing groove. The first sealing ring is installed in the first sealing groove and located between the body and the shaft. An oil passage gap is formed between the first sealing ring and the groove wall of the first sealing groove for communicating with the bearing lubrication oil passage and the connecting hole.

[0012] In one embodiment of the electric drive assembly, the oil collecting ring includes an oil distribution groove formed on the body, the connecting hole connects the oil collecting groove and the oil distribution groove, the oil distribution groove has an oil distribution opening, the rotating shaft is provided with a hollow cavity and an oil outlet and an oil sling hole communicating with the hollow cavity, the oil sling hole is located in the region of the rotating shaft corresponding to the rotor, and the oil distribution opening communicates with the oil outlet and the oil passage gap.

[0013] In one embodiment of an electric drive assembly, the body includes a first annular plate portion, a first annular cylinder portion, and a second annular plate portion arranged sequentially along the axial direction. The outer diameters of both the first and second annular plate portions are larger than the outer diameter of the first annular cylinder portion, forming an oil collecting groove on the outer side of the first annular cylinder portion and between the first and second annular plate portions. The inner diameters of both the first and second annular plate portions are smaller than the inner diameter of the first annular cylinder portion, forming an oil distributing groove on the inner side of the first annular cylinder portion and between the first and second annular plate portions. A connecting hole is formed in the first annular cylinder portion. The bearing is located on the side of the first annular plate portion away from the first annular cylinder portion. The first sealing ring is located between the first annular plate portion and the rotating shaft.

[0014] One embodiment of an electric drive assembly includes a conductive ring, the oil collecting ring including a second annular cylindrical portion connected to a second annular plate portion on a side away from the first annular cylindrical portion, the second annular cylindrical portion having an inner hole, the conductive ring being sleeved on the outside of the rotating shaft, the conductive ring being interference-fitted into the inner hole of the second annular cylindrical portion.

[0015] One embodiment of the electric drive assembly includes a second sealing ring, a second sealing groove is provided on the outer periphery of the rotating shaft, and the second sealing ring is installed in the second sealing groove and located between the second annular plate portion and the rotating shaft.

[0016] One embodiment of an electric drive assembly includes a housing, the housing including an end cap, the end cap including a body portion and a mounting sleeve portion, the body portion having a bearing mounting hole, an oil inlet, and an oil passage, the bearing being interference-fitted into the bearing mounting hole, the mounting sleeve portion protruding from one end face of the body portion, an oil collecting ring being interference-fitted into the inner hole of the mounting sleeve portion, the mounting sleeve portion having an oil inlet, the oil passage connecting the oil inlet and the oil inlet, and the oil inlet connecting the oil passage and the oil collecting opening.

[0017] This application also provides an electric drive assembly, which includes the electric drive components described in any of the preceding claims.

[0018] This application also provides a vehicle that includes the above-described electric drive assembly.

[0019] When the oil collecting ring provided in this application is in use, the oil in the main oil circuit of the electric drive housing enters the oil collecting groove through the oil collecting opening, and then enters the bearing lubrication oil passage through the connecting hole to lubricate the bearing of the electric drive shaft. In this way, the amount of bearing lubricating oil can be adjusted by changing the number and diameter of the connecting holes. The diameter of the connecting holes can be machined to be very small, so the amount of bearing lubricating oil can be adjusted to a smaller value. Compared with adjusting the amount of bearing lubricating oil by changing the diameter of the oil slinger hole on the shaft, the minimum amount of bearing lubricating oil that can be adjusted is smaller. Compared with adjusting the amount of oil by changing the size of the main oil circuit of the electric drive housing, there is no need to repair the housing mold. Therefore, the adjustment cycle is shorter, the adjustment cost is lower, and the adjustment is more convenient.

[0020] The electric drive components, electric drive assemblies, and vehicles provided in this application also have the aforementioned technical effects because they include the oil collecting ring provided in this application. Attached Figure Description

[0021] Figure 1 A perspective view of one embodiment of the oil collecting ring provided in this application;

[0022] Figure 2 for Figure 1 An axial cross-sectional view;

[0023] Figure 3 for Figure 1 A sectional view;

[0024] Figure 4 A cross-sectional view of one embodiment of the electric drive assembly provided in this application;

[0025] Figure 5 for Figure 4 A magnified view of a portion of the image;

[0026] Figure 6 for Figure 4 A three-dimensional view of the middle end cover, the rotating shaft, the first sealing ring, and the second sealing ring;

[0027] Figure 7 A cross-sectional view showing the location where the first sealing ring is installed on the shaft.

[0028] Figures 1-7 The annotations in the accompanying drawings are explained as follows:

[0029] 100 Oil collecting ring, 101 First annular plate, 102 Second annular plate, 103 First annular cylinder, 103a Connecting hole, 104 Second annular cylinder, 104a First limiting step, 104b Anti-misalignment structure, 104c Oil discharge structure, A Oil collecting groove, B Oil distributing groove, C Annular flange, D Rotary shaft hole;

[0030] 200 swivel, 200a oil inlet, 200b oil slinger, 200c second limit step;

[0031] 300 First sealing ring;

[0032] 400 second sealing ring;

[0033] 500 End cap, 501 Body, 501a Bearing mounting hole, 501b Third limiting step, 501c Oil inlet, 501d Oil passage, 502 Mounting sleeve, 502a Main oil inlet.

[0034] 600 bearing

[0035] 700 conductive ring. Detailed Implementation

[0036] To enable those skilled in the art to better understand the technical solutions of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] like Figures 1-3 As shown, the oil collecting ring 100 provided in this application includes a body and an oil collecting groove A opened on the body. The body has a shaft hole for connecting with the electric drive shaft. The oil collecting groove A has an oil collecting opening A1 for communicating with the main oil passage of the electric drive housing. A connecting hole 103a for communicating with the bearing lubricating oil passage of the shaft is opened on the groove wall of the oil collecting groove A.

[0038] When the oil collecting ring 100 provided in this application is in use, the oil in the main oil circuit of the electric drive housing enters the oil collecting groove A through the oil collecting opening A1, and then enters the bearing lubrication oil passage through the connecting hole 103a to lubricate the bearing of the electric drive shaft. In this way, the amount of bearing lubricating oil can be adjusted by changing the number and diameter of the connecting holes 103a. The diameter of the connecting holes 103a can be processed to be very small, so the amount of bearing lubricating oil can be adjusted to a smaller value. Compared with adjusting the amount of bearing lubricating oil by changing the diameter of the oil slinger hole on the shaft, the minimum amount of bearing lubricating oil that can be adjusted is smaller. Compared with adjusting the amount of oil by changing the size of the main oil circuit of the electric drive housing, there is no need to repair the housing mold. Therefore, the adjustment cycle is shorter, the adjustment cost is lower, and the adjustment is more convenient.

[0039] In some embodiments, such as Figures 1-3As shown, the oil collecting ring 100 includes an oil distribution groove B formed on its body. A connecting hole 103a connects the oil collecting groove A and the oil distribution groove B. The oil distribution groove B has an oil distribution opening B1 for communicating with the bearing lubrication oil passage and the rotor lubrication oil passage of the rotating shaft. In use, the oil in the main oil circuit of the electric drive housing enters the oil collecting groove A through the oil collecting opening A1, then enters the oil distribution groove B through the connecting hole 103a, and then splits into two paths from the oil distribution opening B1. One path enters the bearing lubrication oil passage to lubricate the bearing, and the other path enters the rotor lubrication oil passage to lubricate and dissipate heat for the rotor. With this design, the oil collecting ring 100 has both oil collecting and oil distribution functions, eliminating the need to insert an oil inlet pipe at the end of the rotating shaft, thus saving the precision machining costs and high coaxiality assembly costs associated with the mating position of the outer circumferential surface of the oil inlet pipe and the inner circumferential surface of the rotating shaft.

[0040] In some embodiments, such as Figures 1-3 As shown, the main body includes a first annular plate portion 101, a second annular plate portion 102, and a first annular cylindrical portion 103. The first annular plate portion 101, the first annular cylindrical portion 103, and the second annular plate portion 102 are arranged sequentially along the axial direction of the oil collecting ring 100, and a connecting hole 103a is formed in the first annular cylindrical portion 103. The outer diameters of the first annular plate portion 101 and the second annular plate portion 102 are both larger than the outer diameter of the first annular cylindrical portion 103, thereby forming the aforementioned oil collecting groove A between the first annular plate portion 101 and the second annular plate portion 102 and on the outer side of the first annular cylindrical portion 103. The inner diameters of the first annular plate portion 101 and the second annular plate portion 102 are both smaller than the inner diameter of the first annular cylindrical portion 103, thereby forming the aforementioned oil separating groove B between the first annular plate portion 101 and the second annular plate portion 102 and on the inner side of the first annular cylindrical portion 103. The oil collecting opening A1 is located outside the oil collecting groove A, and the oil separating opening B1 is located inside the oil separating groove B. It should be noted that in the description of the oil collecting ring in this application, "inner" refers to the position relatively close to the central axis of the oil collecting ring 100 along the radial direction, and "outer" refers to the position relatively far away from the central axis of the oil collecting ring 100 along the radial direction.

[0041] In some embodiments, the oil collecting ring 100 further includes a second annular cylindrical portion 104, which is connected to the side of the second annular plate portion 102 away from the first annular cylindrical portion 103. The inner diameter of the second annular cylindrical portion 104 is larger than the inner diameter of the second annular plate portion 102 and also larger than the inner diameter of the first annular plate portion 101. The second annular cylindrical portion 104 has an inner hole for mounting the conductive ring 700. This design allows the oil collecting ring 100 to also serve as a mounting base for the conductive ring 700, thus also functioning as a support for the conductive ring 700. When the oil collecting ring 100 is fitted around the outer circumference of the rotating shaft 200, the conductive ring 700, installed in the inner hole of the second annular cylindrical portion 104 of the oil collecting ring 100, contacts the rotating shaft 200, providing conductivity and thus resolving the shaft voltage problem of the rotating shaft 200. In the illustrated embodiment, the inner circumference of the second annular cylindrical portion 104 of the oil collecting ring 100 is provided with a first limiting step 104a, which is used to abut against one end face of the conductive ring 700 to axially limit the conductive ring 700.

[0042] In some embodiments, a mis-proof structure 104b is provided on one side of the second annular cylindrical portion 104, and an oil draining structure 104c is provided on the side of the second annular cylindrical portion 104 opposite to the mis-proof structure 104b. The mis-proof structure 104b ensures that, in use, the oil collecting ring 100 is fitted around the outer periphery of the rotating shaft 200 with the oil draining structure 104c facing downwards. The oil draining structure 104c penetrates both the inner and outer circumferential surfaces of the second annular cylindrical portion 104. In this way, the oil inside the second annular cylindrical portion 104 can be discharged from the oil draining structure 104c by its own gravity, avoiding the problem of the conductive ring 700 installed in the inner hole of the second annular cylindrical portion 104 being damaged by long-term immersion in oil. In the illustrated embodiment, the mis-proof structure 104b is an inwardly recessed groove. In actual implementation, the mis-proof structure 104b is not limited to a groove; for example, it can also be an outwardly protruding ridge. In the illustrated embodiment, the oil drain structure 104c is a notch, and the second annular cylindrical portion 104 is broken at the notch, rather than being a complete annular structure. In actual implementation, the oil drain structure 104c is not limited to a notch; for example, it can also be a through hole penetrating the inner and outer circumferential surfaces of the second annular cylindrical portion 104.

[0043] In the illustrated embodiment, as Figure 3As shown, the second annular cylindrical portion 104 is provided with four connecting holes 103a. All four connecting holes 103a are located on the same cross-section of the second annular cylindrical portion 104 (i.e., a cross-section perpendicular to the axial direction of the second annular cylindrical portion). The four connecting holes 103a are evenly spaced in the circumferential direction, and the included angle between adjacent connecting holes 103a is 90 degrees. In actual implementation, the number of connecting holes 103a is not limited to four; for example, it can be one, two, three, or more than four. The connecting holes 103a can also be distributed on different cross-sections of the second annular cylindrical portion 104. The connecting holes 103a on the same cross-section can also be evenly spaced in the circumferential direction. The included angle between adjacent connecting holes 103a can also be less than 90 degrees or greater than 90 degrees.

[0044] In the illustrated embodiment, along the axial direction of the oil collecting ring 100, the distance between the outer ring region of the first annular plate portion 101 and the outer ring region of the second annular plate portion 102 is greater than the distance between the inner ring region of the first annular plate portion 101 and the inner ring region of the second annular plate portion 102. This results in the axial width of the oil collecting groove A being greater than the axial width of the oil distributing groove B, and also creates a step between the inner and outer ring regions of the first annular plate portion 101 and the second annular plate portion 102. With this design, after oil enters the oil distributing groove B from the oil collecting groove A, it can generate greater pressure within the oil distributing groove B, allowing it to flow more smoothly from the oil distributing groove B to its target location under pressure. Furthermore, the first annular plate portion 101 and the second annular plate portion 102 have higher structural strength.

[0045] In the illustrated embodiment, both the inner circumferences of the first annular plate portion 101 and the second annular plate portion 102 are provided with annular flanges C. The annular flange C of the first annular plate portion 101 extends from the first annular plate portion 101 away from the second annular plate portion 102, and the annular flange C of the second annular plate portion 102 extends from the second annular plate portion 102 away from the first annular plate portion 101. The annular flanges C result in a larger axial width of the inner circumferential surface of the first annular plate portion 101 and the inner circumferential surface of the second annular plate portion 102. In use, the oil collecting ring 100 is fitted around the outer circumference of the motor shaft 200. A sealing ring is provided between the first annular plate portion 101 and the second annular plate portion 102 and the shaft 200. The larger the axial width of the inner circumferential surface of the first annular plate portion 101 and the second annular plate portion 102, the wider the range of selectable sizes for the sealing ring.

[0046] like Figures 4-7 As shown, the electric drive assembly provided in this application includes at least the aforementioned oil collecting ring 100.

[0047] In some embodiments, the electric drive assembly further includes a motor, a bearing 600, and a first sealing ring 300. The motor includes a rotor and a shaft 200, which can be assembled together or are an integral structure. The oil collecting ring 100 and the bearing 600 are both sleeved around the shaft 200 and arranged sequentially along the axial direction. A first sealing groove is provided on the outer periphery of the shaft 200, and the first sealing ring 300 is installed in the first sealing groove and located between the body of the oil collecting ring 100 and the shaft 200. When the body of the oil collecting ring 100 includes the aforementioned first annular plate portion 101 and first annular cylinder portion 103, the first sealing ring 300 is located between the first annular plate portion 101 and the shaft 200, and the bearing 600 is located on the side of the first annular plate portion 101 away from the first annular cylinder portion 103. Figure 5 From the perspective shown, the first annular cylindrical portion 103 is located to the right of the first annular plate portion 101, so the side of the first annular plate portion 101 away from the first annular cylindrical portion 103 is the left side of the first annular plate portion 101, and the oil collecting ring 100 is located to the left of the first annular plate portion 101.

[0048] like Figure 7 As shown, an oil passage gap D is formed between the first sealing ring 300 and the groove wall of the first sealing groove, as... Figure 7 As shown by the middle arrow, the oil in the oil distribution groove B of the oil collecting ring 100 can reach the bearing 600 through the oil passage gap D between the first sealing ring 300 and the groove wall of the first sealing groove. In the illustrated embodiment, the cross-section of the first sealing ring 300 is "convex" shaped, and the smaller end of the "convex" is closer to the bottom wall of the first sealing groove than the larger end. This shape of the first sealing ring 300 makes the resistance of oil passing through the oil passage gap smaller. In actual implementation, the cross-section of the first sealing ring 300 is not limited to this. For example, an O-ring with an "O" shaped cross-section can also be used.

[0049] In some embodiments, the oil collecting ring 100 includes the aforementioned oil distribution groove B. The rotating shaft 200 has a hollow cavity and an oil inlet hole 200a and an oil slinger hole 200b communicating with the hollow cavity. The oil slinger hole 200b is located in the region of the rotating shaft 200 corresponding to the rotor. The oil distribution opening B1 of the oil distribution groove B communicates with the oil inlet hole 200a, allowing the oil in the oil distribution groove B to enter the hollow cavity through the oil inlet hole 200a to dissipate heat from the rotating shaft 200. After entering the hollow cavity, as the rotating shaft 200 rotates, the oil in the hollow cavity is slinged onto the rotor from the oil slinger hole 200b to lubricate and dissipate heat from the rotor. That is, after the oil flows out from the oil distribution opening B1 of the oil distribution groove B, it splits into two paths: one goes to the bearing 600, and the other goes to the hollow cavity of the rotating shaft 200. The more connecting holes 103a there are and the larger the diameter of the connecting holes 103a, the greater the sum of the oil volume in these two paths. The smaller the oil passage gap D between the first sealing ring 300 and the first sealing groove, the less oil goes to the bearing 600 and the more oil goes to the hollow cavity of the rotating shaft 200.

[0050] Specifically, the number of oil inlet holes 200a can be one, two, or more. The oil inlet holes 200a can be located on the same cross-section of the rotating shaft 200 (i.e., a cross-section perpendicular to the shaft's axial direction) or on different cross-sections of the rotating shaft 200. The oil outlet holes located on the same cross-section of the rotating shaft 200 are preferably arranged symmetrically about the central axis of the rotating shaft 200. The number of oil slinger holes 200b can be one, two, or more. The oil slinger holes 200b can be located on the same cross-section of the rotating shaft 200 or on different cross-sections of the rotating shaft 200. The oil slinger holes 200b located on the same cross-section of the rotating shaft 200 are preferably arranged symmetrically about the central axis of the rotating shaft 200.

[0051] In some embodiments, the electric drive assembly includes a housing. The housing includes an end cap 500 and a housing body (not shown). The end cap 500 is located at one end of the housing body. The end cap 500 includes a body portion 501 and a mounting sleeve portion 502. The body portion 501 has a bearing mounting hole 501a, an oil inlet 501c, and a main oil passage 501d. The bearing 600 is interference-fitted into the bearing mounting hole 501a. The mounting sleeve portion 502 protrudes from one end face of the body portion 501. Figure 5 From the perspective shown, the mounting sleeve 502 protrudes from the right end face of the main body 501. The oil collecting ring 100 is interference-fitted into the inner hole of the mounting sleeve 502. The mounting sleeve 502 is provided with a main oil inlet hole 502a. The main oil passage 501d connects the oil inlet 501c and the main oil inlet hole 502a. The main oil inlet hole 502a connects the main oil passage 501d and the oil collecting opening A1 of the oil collecting tank A. Oil enters the main oil passage 501d from the oil inlet 501c, and then enters the oil collecting tank A from the main oil passage 501d through the main oil inlet hole 502a and the oil collecting opening A1 of the oil collecting tank A.

[0052] In the illustrated embodiment, a protruding ridge is provided on one end face of the body portion 501 of the end cap 500. The main oil passage 501d is formed inside the protruding ridge. This application does not limit the structure of the main oil passage 501d, as long as it can connect the oil inlet 501c and the main oil inlet hole 502a. In the illustrated embodiment, the end cap 500 is provided with a connecting hole, which is connected to the shell body by a threaded fastener passing through the connecting hole. In actual implementation, the end cap 500 and the shell body can also be an integral structure. In the illustrated embodiment, the rotating shaft 200 is provided with a second limiting step 200c, which abuts against one end face of the inner ring of the bearing 600, axially limiting the inner ring of the bearing 600. The end cap 500 is provided with a third limiting step 501b, which abuts against one end face of the outer ring of the bearing 600, axially limiting the outer ring of the bearing 600.

[0053] In some embodiments, the electric drive assembly further includes a conductive ring 700, which is sleeved around and in contact with the rotating shaft 200. The conductive ring 700 is interference-fitted into the inner hole of the second annular cylindrical portion 104 and serves to conduct electricity, thus solving the shaft voltage problem of the rotating shaft 200. This design eliminates the need for mounting holes for the conductive ring 700 on the housing of the motor, reducing the design and manufacturing costs of the housing mold. In the illustrated embodiment, the first limiting step 104a on the inner circumference of the second annular cylindrical portion 104 of the oil collecting ring 100 abuts against one end face of the conductive ring 700, axially limiting the conductive ring 700.

[0054] In some embodiments, the electric drive assembly further includes a second sealing ring 400. A second sealing groove is provided on the outer periphery of the rotating shaft 200. The second sealing ring 400 is installed in the second sealing groove and located between the second annular plate portion 102 and the second rotating shaft 200. There may be a gap between the second sealing ring 400 and the groove wall of the second sealing groove, so that the second sealing ring 400 is in a non-completely sealed state; or there may be no gap, so that the second sealing ring 400 is in a completely sealed state.

[0055] The electric drive assembly provided in this application includes the aforementioned electric drive components. The vehicle provided in this application includes the aforementioned electric drive assembly. The vehicle may be a pure electric vehicle or a hybrid vehicle.

[0056] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. An oil collection ring characterized by, The oil collecting ring (100) includes a body and an oil collecting groove (A) opened on the body. The body has a shaft hole for engaging with the electric drive shaft. The oil collecting groove (A) has an oil collecting opening (A1) for communicating with the main oil passage of the electric drive housing. The groove wall of the oil collecting groove (A) is provided with a connecting hole (103a) for communicating with the bearing lubricating oil passage of the shaft.

2. The oil collection ring of claim 1, wherein, The oil collecting ring (100) includes an oil distribution groove (B) opened on the body, and the connecting hole (103a) connects the oil collecting groove (A) and the oil distribution groove (B). The oil distribution groove (B) has an oil distribution opening (B1) for communicating with the bearing lubricating oil passage and the rotor lubricating oil passage of the rotating shaft.

3. The oil collection ring of claim 2, wherein, The body includes a first annular plate portion (101), a first annular cylinder portion (103), and a second annular plate portion (102) arranged sequentially along the axial direction. The outer diameter of the first annular plate portion (101) and the outer diameter of the second annular plate portion (102) are both larger than the outer diameter of the first annular cylinder portion (103) to form the oil collecting groove (A) on the outside of the first annular cylinder portion (103) and between the first annular plate portion (101) and the second annular plate portion (102). The inner diameter of the first annular plate portion (101) and the inner diameter of the second annular plate portion (102) are both smaller than the inner diameter of the first annular cylinder portion (103) to form the oil separating groove (B) on the inside of the first annular cylinder portion (103) and between the first annular plate portion (101) and the second annular plate portion (102). The connecting hole (103a) is opened in the first annular cylinder portion (103).

4. The oil collecting ring according to claim 3, characterized in that, The body includes a second annular cylindrical portion (104), which is connected to the side of the second annular plate portion (102) away from the first annular cylindrical portion (103). The second annular cylindrical portion (104) has an inner hole for mounting a conductive ring (700). The inner diameter of the second annular cylindrical portion (104) is larger than the inner diameter of the second annular plate portion (102) and also larger than the inner diameter of the first annular plate portion (101).

5. The oil collecting ring according to claim 4, characterized in that, The inner circumferential surface of the second annular cylindrical portion (104) is provided with a first limiting step (104a), which is used to abut against one end face of the conductive ring (700) to axially limit the conductive ring (700).

6. The oil collecting ring according to claim 3 or 4, characterized in that, The second annular cylindrical portion (104) has a fault-prevention structure (104b) on one side, and an oil draining structure (104c) is provided on the side of the second annular cylindrical portion (104) opposite to the fault-prevention structure (104b). The oil draining structure (104c) penetrates the inner and outer circumferential surfaces of the second annular cylindrical portion (104).

7. An electrically driven assembly, characterized in that, The electric drive assembly includes the oil collecting ring (100) as described in any one of claims 1-6.

8. The electric drive assembly according to claim 7, characterized in that, The electric drive assembly includes a motor, a bearing (600), and a first sealing ring (300). The motor includes a rotor and a shaft (200). The oil collecting ring (100) and the bearing (600) are both sleeved on the shaft (200) and arranged sequentially along the axial direction. The outer periphery of the shaft (200) is provided with a first sealing groove. The first sealing ring (300) is installed in the first sealing groove and is located between the body and the shaft (200). An oil passage gap (D) is formed between the first sealing ring (300) and the groove wall of the first sealing groove for communicating with the bearing lubrication oil passage and the connecting hole (103a).

9. The electric drive assembly according to claim 8, characterized in that, The oil collecting ring (100) includes an oil distribution groove (B) opened on the body. The connecting hole (103a) connects the oil collecting groove (A) and the oil distribution groove (B). The oil distribution groove (B) has an oil distribution opening (B1). The rotating shaft (200) is provided with a hollow cavity and an oil inlet hole (200a) and an oil sling hole (200b) communicating with the hollow cavity. The oil sling hole (200b) is located in the region of the rotating shaft (200) corresponding to the rotor. The oil distribution opening (B1) communicates with the oil inlet hole (200a) and the oil passage gap (D).

10. The electric drive assembly according to claim 9, characterized in that, The body includes a first annular plate portion (101), a first annular cylinder portion (103), and a second annular plate portion (102) arranged sequentially along the axial direction. The outer diameter of the first annular plate portion (101) and the outer diameter of the second annular plate portion (102) are both larger than the outer diameter of the first annular cylinder portion (103), so that the oil collecting groove (A) is formed on the outside of the first annular cylinder portion (103) and between the first annular plate portion (101) and the second annular plate portion (102). The inner diameter of the first annular plate portion (101) and the inner diameter of the second annular plate portion (102) are... The inner diameters are all smaller than the inner diameter of the first annular cylindrical portion (103) to form the oil distribution groove (B) on the inner side of the first annular cylindrical portion (103) and between the first annular plate portion (101) and the second annular plate portion (102). The connecting hole (103a) is opened in the first annular cylindrical portion (103). The bearing (600) is located on the side of the first annular plate portion (101) away from the first annular cylindrical portion (103). The first sealing ring (300) is located between the first annular plate portion (101) and the rotating shaft (200).

11. The electric drive assembly according to claim 10, characterized in that, The electric drive assembly includes a conductive ring (700), and the oil collecting ring (100) includes a second annular cylindrical portion (104). The second annular cylindrical portion (104) is connected to the side of the second annular plate portion (102) away from the first annular cylindrical portion (103). The second annular cylindrical portion (104) has an inner hole. The conductive ring (700) is sleeved on the rotating shaft (200), and the conductive ring (700) is interference-fitted into the inner hole of the second annular cylindrical portion (104).

12. The electric drive assembly according to claim 10, characterized in that, The electric drive assembly includes a second sealing ring (400), and a second sealing groove is provided on the outer periphery of the rotating shaft (200). The second sealing ring (400) is installed in the second sealing groove and is located between the second annular plate portion (102) and the rotating shaft (200).

13. The electric drive assembly according to any one of claims 7-12, characterized in that, The electric drive assembly includes a housing, the housing includes an end cap (500), the end cap (500) includes a body portion (501) and a mounting sleeve portion (502), the body portion (501) is provided with a bearing mounting hole (501a), an oil inlet (501c) and a main oil passage (501d), the bearing (600) is interference-fitted into the bearing mounting hole (501a), the mounting sleeve portion (502) protrudes from one end face of the body portion (501), the oil collecting ring (100) is interference-fitted into the inner hole of the mounting sleeve portion (502), the mounting sleeve portion (502) is provided with a main oil inlet hole (502a), the main oil passage (501d) connects the oil inlet (501c) and the main oil inlet hole (502a), and the main oil inlet hole (502a) connects the main oil passage (501d) and the oil collecting opening (A1).

14. An electric drive assembly, characterized in that, The electric drive assembly includes the electric drive component as described in any one of claims 7-13.

15. A vehicle, characterized in that, The vehicle includes the electric drive assembly of claim 14.

Images