Collecting element for oil guiding device
By designing the collection components for the oil guide device, including the input opening, the supplying part, the guide part, the output opening and the fastening part, the problem of poor oil guidance in the prior art is solved, and a good oil coating effect is achieved.
Patent Information
- Application Number
- CN202411652112.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-11-20
- Filing Date
- 2024-11-19
- Publication Date
- 2025-05-20
AI Technical Summary
Existing oil guide devices are difficult to guide the oil to the rotor bearings simply and effectively, resulting in poor oil coating.
A collection component for an oil guide device is designed, including an input opening, a supplying part, a guide part, an output opening and a fastening part through which oil is directed from the wall part and the main oil passage to the rotor bearing.
The simple and efficient guide of oil to the rotor bearing ensures good oiling effect and avoids insufficient lubrication in certain operating conditions.
Smart Images
Figure CN120020409A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a collecting component for an oil guiding device, an oil guiding device for a drive unit, a drive unit for a vehicle, and a vehicle. Background Art
[0002] Oil guiding devices for supplying oil to different components of a drive unit for lubrication and cooling are known. The drive unit may include an electric drive having a rotor and a rotor bearing. The rotor bearing may be accommodated in a housing. The rotor bearing may be axially located within the rotor. Guiding oil to the rotor bearing through oil ducts in the housing is complex. Summary of the Invention
[0003] It is an object of the present invention to provide an improved oil guiding device that can guide oil to the rotor bearing in a simple manner and ensure good oil application.
[0004] This object is solved by a collecting component for an oil guiding device, the collecting component comprising the features of claim 1. Advantageous embodiments are the subject matter of the dependent claims.
[0005] There is provided a collecting component for an oil guiding device, the oil guiding device including a wall portion. The wall portion forms a main oil duct. The wall portion may form the main oil duct in sections. The collecting component includes an input opening, a supply portion, a guiding portion, an output opening, and a fastening portion.
[0006] The fastening portion is configured to fix the collecting component to the wall portion. Two fastening portions may be provided. One fastening portion may be formed by means of at least one clip. One fastening portion may include three clips. One clip may be configured as an elastic hook element protruding in the axial direction. The clips of one fastening portion may be arranged in a circular manner. One fastening portion may be formed as a tab for a threaded connection. One fastening portion may protrude from the guiding portion in the axial direction. The collecting component may be used for a drive unit that includes a rotor bearing having a rotational axis. The axial direction may point in the direction of the rotational axis of the rotor bearing. The fastening portion may be arranged radially symmetrically with respect to the rotational axis of the rotor bearing.
[0007] The input opening is arranged at the upper side of the collecting component. The input opening is formed in sections by the supply portion. The input opening is configured to receive both oil dripping from the wall portion and oil flowing out of the main oil duct. The input opening may be configured to receive oil dripping from the wall portion in the direction of gravity.
[0008] When the collecting component is used as intended in a drive unit having an oil guiding device, a direction of gravity is generated. When used as intended, the collecting component may be fastened to the wall portion by means of at least one fastening portion.
[0009] The input opening can cover the wall portion in the axial direction. For example, the input opening can protrude beyond the end face in the axial direction on the side of the supply portion. The input opening can be substantially rectangular in the circumferential direction. The input opening can include an arcuate profile in the radial direction. The input opening can be constructed in a circular manner and concentrically with respect to the rotational axis of the rotor bearing in the radial direction.
[0010] The guiding portion is constructed to guide oil from the wall portion and the main oil passage to the output opening in the axial direction. The guiding portion can extend from the output opening to the input opening. The input opening can form the upper side of the guiding portion in the direction of gravity.
[0011] The output opening is arranged on the lower side of the collecting member and is opposite to the supply portion in the axial direction. The lower side of the collecting member can be arranged at the bottom with respect to the direction of gravity. The output opening can be formed at the lowest point of the guiding portion in the direction of gravity. The output opening can be formed in a cylindrical recess. The cylindrical recess can be aligned in the axial direction. The output opening can be a cylindrical hole. The output opening can extend in the axial direction and the radial direction. The radial direction can be the radial direction of the rotor bearing. The output opening can extend in the direction of the rotor bearing.
[0012] In one embodiment, the first radial surface and the second radial surface of the guiding portion can be arranged opposite to each other in the circumferential direction. The first radial surface and the second radial surface can taper towards each other at an angle in the radial direction. The first radial surface and the second radial surface can be connected to the cylindrical recess on the inner side in the radial direction. The first radial surface can be constructed such that it can receive the thrown oil. The first radial surface can be constructed steeper than the second radial surface. The steep radial surface can be constructed steeply with respect to the direction of gravity. If the radial surface is steep, this may mean that the angle of the radial surface with respect to the direction of gravity is small. The collecting member can be used for a drive unit including a first gear set. The thrown oil can be the oil thrown in the circumferential direction from the first gear set during the operation of the gear set elements of the first gear set. The throwing direction of the thrown oil can include a radial component due to centrifugal force.
[0013] One of the first radial surface and the second radial surface may be aligned in the axial direction. One of the first radial surface and the second radial surface may extend substantially in the radial direction. The first radial surface and the second radial surface may be arranged such that the profile of the guiding portion is configured in a V-shape or triangular shape in the radial direction. The first radial surface and the second radial surface may be arranged such that the guiding portion is configured in a funnel shape in the radial direction. The first radial surface and the second radial surface may form an obtuse angle with each other. The first radial surface may project further upward in the direction of gravity. As a result, during operation, the oil surface may be received in the guiding portion, and due to the oil pressure, the oil surface may be formed obliquely by the movement of the first gear set.
[0014] In one embodiment, the axial surfaces arranged laterally in the axial direction may be substantially parallel to each other. The axial surfaces may extend in the radial direction and may be arranged in the circumferential direction. The axial surfaces may be positioned opposite to each other in the axial direction with respect to the input opening.
[0015] In one embodiment, the guiding portion may include at least one step. A plurality of steps may be provided. Two steps may be provided. These steps may be arranged to be gradually closer to the output opening. The closer the steps are to the output opening in the axial direction, the closer the steps may be to the output opening in the radial direction. One of the steps may include an arcuate outer periphery. The outer periphery of the step may be cylindrical. The steps may be arranged coaxially with respect to the rotational axis of the rotor bearing. The steps may include a smaller diameter in the axial direction towards the output opening. The first step may include a smaller diameter than the second step, wherein the first step may be arranged closer to the output opening in the axial direction than the second step. One of the steps may be formed at the axial surface.
[0016] In one embodiment, the supply portion may bulge outward from the guiding portion in the axial direction such that the supply portion is aligned with the main oil passage. Alignment may mean that the supply portion is positioned as an extension of the main oil passage. The inner diameter at one end of the main oil passage may be arranged within the inner diameter of the supply portion in the axial direction. The supply portion may be cylindrical. The diameter of the guiding portion may be greater than the opening at that end of the main oil passage. The supply portion may bulge from the axial surface of the guiding portion.
[0017] In one embodiment, the guiding portion may be configured such that it forms an oil volume that is bounded upward by the input opening and includes the output opening at the bottom. The input opening may be bounded upward with respect to the direction of gravity. The guiding portion may include the output opening at the bottom with respect to the direction of gravity. The oil volume may provide an oil reserve. In this way, under-lubrication in certain operating conditions can be avoided.
[0018] In one aspect, an oil guiding device for a drive unit is provided. The drive unit includes an electric drive having a rotor, a rotor bearing, and a first gear set. The oil guiding device includes a wall portion and a collecting member according to any of the foregoing embodiments. The wall portion forms a main oil passage. The wall portion may form the main oil passage in sections. The wall portion includes a bearing seat for the rotor bearing, and the bearing seat is configured such that the rotor bearing is axially disposed within the rotor. An output opening is disposed adjacent to the bearing seat in the axial direction. Adjacent may mean that the output opening and the rotor bearing are spaced apart from each other in the axial direction such that oil can flow out from the output opening into the gap between the outer ring and the inner ring of the rotor bearing. The output opening and the rotor bearing may be spaced apart from each other in the axial direction. The rotor bearing and the main oil passage may be spaced apart from each other in the axial direction. The wall portion may extend in the radial direction. The output opening may be formed as a cylindrical hole. The output opening may extend in the axial direction and the radial direction. The output opening may extend in the direction of the rotor bearing.
[0019] In one embodiment, the wall portion may be configured to collect the thrown oil thrown from the first gear set in the circumferential direction during operation. The wall portion may include a radial surface in the region around the main oil hole. The radial surfaces may be aligned in the axial direction. The radial surfaces may extend substantially in the radial direction such that the oil moving in the circumferential direction can impinge on the radial surfaces.
[0020] In one aspect, a drive unit for a vehicle is provided. The drive unit includes an electric drive having a rotor, a rotor bearing, a first gear set, a second gear set, a first output shaft, a second output shaft, and an oil guiding device according to any of the foregoing aspects or embodiments. The rotor is configured to transmit torque to the first gear set. The rotor bearing rotatably supports the rotor at the wall portion. The first gear set and the second gear set are mechanically operably connected to each other such that torque can be transmitted from the first gear set to the second gear set. The first output shaft is configured to output torque from the first gear set. The second output shaft is configured to output torque from the second gear set. The first gear set and the second gear set may be used as differential gears.
[0021] In one embodiment, the first gear set may be formed by a first planetary gear set. The second gear set may be formed by a second planetary gear set. The first gear set may be arranged to be offset from the second gear set in the axial direction. The first gear set and the second gear set may be arranged in the same plane in the axial direction.
[0022] In one aspect, a vehicle includes drive wheels and a drive unit according to any of the foregoing aspects or embodiments. The first output shaft is configured to drive one of the drive wheels. The second output shaft is configured to drive the other drive wheel. Description of the Drawings
[0023] Figure 1 A perspective view showing an embodiment of the collection member.
[0024] Figure 2 A front view showing an embodiment of the collection member.
[0025] Figure 3 A cross-sectional view showing an embodiment of a drive unit having an oil guiding device with a collection member.
[0026] Figure 4 Shows details of a cross-sectional view of an embodiment of a drive unit from Figure 3
[0027] Figure 5 A cross-sectional view showing an embodiment of the oil guiding device.
[0028] Figure 6 Shows an embodiment of the oil guiding device. Detailed Description
[0029] Figure 1 A perspective view showing an embodiment of the collection member 80. The collection member 80 is applicable to an oil guiding device that includes a wall portion 61 shown in Figures 3 to 6 . The oil guiding device is applicable to a drive unit that includes a rotor bearing 44 depicted in Figure 3 and Figure 4 . The collection member 80 includes an input opening 81, a supply portion 82, a guiding portion 83, an output opening 84, and a fastening portion 85.
[0030] The wall portion 61 forms a main oil passage 90 that will be described in detail with reference to Figure 3 . The collection member 80 is configured to guide oil from the wall portion 61 and the main oil passage 90 to the rotor bearing 44 in the axial direction.
[0031] Further details of the collection member 80 are described below.
[0032] The input opening 81 is disposed at the upper side of the collection member 80. The input opening 81 is configured to cover the end face of the wall portion 61 in the axial direction. The input opening 81 is configured to receive both the oil dripping from the wall portion 61 and the oil flowing out of the main oil passage 90. The input opening 81 is rectangular in the circumferential direction.
[0033] The supply portion 82 partially forms the input opening 81. The supply portion 82 bulges axially outward from the guiding portion 83. The supply portion 82 is formed in a cylindrical shape. The supply portion 82 extends in the radial direction such that it aligns with the main oil passage 90 as expected during use.
[0034] The guide portion 83 is configured to guide the oil from the wall portion 61 and the main oil gallery 90 to the output opening 84 in the axial direction. The guide portion 83 includes a first radial surface and a second radial surface arranged opposite to each other in the circumferential direction. The guide portion 83 includes an axial surface arranged in the axial direction. The front axial surface includes two steps. These steps are cylindrical in the circumferential direction. Towards the output opening 84, these steps include a smaller radius and are arranged closer to the output opening 84 in the radial direction. The step arranged closest to the output opening 84 in the axial direction is also arranged closest to the output opening 84 in the radial direction. In the present case, two steps are provided.
[0035] The output opening 84 is arranged on the lower side of the collecting part 80 and opposite to the supply part 82 in the axial direction. The output opening 84 is arranged between the lower ends of the radial surfaces. The output opening 84 is formed by means of a cylindrical hole, which extends obliquely in the axial direction and in the radial direction and is aligned in the direction of the rotor bearing 44. The output opening 84 is one multiple smaller than the input opening 81.
[0036] The fastening portion 85 is configured to fasten the collecting member 80 to the wall portion 61. In the present case, two fastening portions 85 are provided. These fastening portions 85 are arranged radially symmetrically. The fastening portions 85 are arranged at opposite ends of the front axial surface in the radial direction. The fastening portions 85 are arranged on the outside in the radial direction. Each fastening portion 85 includes three hooks arranged in a circular manner. These hooks extend in the axial direction. These hooks include a distance from each other so that the hooks can be elastically deformed toward each other. As a result, the hooks can be hooked into the holes at the wall portion 61.
[0037] Figure 2 shows a front view of an embodiment of the collecting component 80. This embodiment includes all the features of the previous embodiments. The guide portion 83 is in Figure 2 The first radial surface arranged on the left side and in Figure 2 The second radial surface arranged on the right side in tapers toward each other at an angle in the radial direction. The first radial surface is configured so that it can receive the slinging oil. In Figure 2 , the oil is thrown counterclockwise in the circumferential direction. The first radial surface is configured to be steeper than the second radial surface relative to the gravity direction X. The first radial surface and the second radial surface are arranged in a funnel-shaped manner and extend radially outward to the input opening 81.
[0038] An oil volume is formed in the guide portion 83. The upper side of the oil volume is represented by a horizontal line. The upper horizontal line represents the maximum oil volume in the guide portion 83 and forms an oil reservoir by which the rotor bearing 44 can be lubricated even when no oil flows into the input opening 81. In this case, the oil volume in the guide portion 83 is reduced. The reduced oil volume is represented by the lower horizontal line.
[0039] In the foregoing embodiment, the supply portion 82 and the main oil passage 90 are aligned obliquely with respect to the gravity direction X. In an alternative embodiment, the supply portion 82 and the main oil passage 90 are aligned in the gravity direction X.
[0040] Figure 3 A cross-sectional view of an embodiment of a drive unit having an oil guiding device with a collecting member 80 is shown. The drive unit includes: an electric drive having a stator 70 and a rotor 71; a rotor bearing 44 and a first gear set (in this case a first planetary gear set 10); a second gear set (in this case a second planetary gear set); a first output shaft 5; and an oil guiding device having a wall portion 61 and a collecting member 80 according to any of the foregoing embodiments.
[0041] The first gear set includes: a first sun gear 11; a first planet carrier 12; a plurality of first planet bolts 13; a plurality of first planet gears 14; and a first ring gear 15. The first sun gear 11 engages with one of the first planet gears 14. One of the first planet gears 14 engages with the first ring gear 15 and is rotatably supported on one of the first planet bolts 13. The first planet bolts 13 are connected to the first planet carrier 12. The second gear set is arranged to be offset from the first gear set in the axial direction and is not shown in Figure 3 the figure.
[0042] The input element 4 is rotationally fixedly connected to the rotor 71. The input element 4 forms the first sun gear 11 on its outer periphery. Thus, the rotor 71 is configured to transmit torque to the first gear set. Inside the input element 4, the first output shaft 5 extends coaxially with respect to the input element 4.
[0043] The rotor bearing 44 rotatably supports the rotor 71 at the wall portion 61. The rotor bearing 44 is arranged in the stator 70 in the radial direction and the axial direction.
[0044] The main oil passage 90 extends vertically in the gravity direction X. The main oil passage 90 is arranged to be offset from the rotor bearing 44 in the axial direction. The main oil passage 90 includes a tapered portion at its end in the oil flow direction, in this case an oil nozzle having an inner diameter. The main oil passage 90 is formed by a cylindrical hole. The main oil passage 90 includes a screw-in oil throttle valve at its start in the oil flow direction. The inner diameter of the oil throttle valve serving as an oil passage is smaller than the inner diameter of the oil nozzle.
[0045] The wall portion 61 includes a metal sheet member extending in the circumferential direction. The collecting member 80 is fastened to the metal sheet member by means of two fastening portions 85. The collecting member 80 is fastened to the wall portion 61 such that the supply portion 82 is aligned with the main oil passage 90. The collecting member 80 is fastened to the wall portion 61 such that the output opening 84 is aligned with the rotor bearing 44. The distance in the axial direction between the output opening 84 and the rotor bearing 44 is small such that oil can flow out of the output opening 84 between the outer ring and the inner ring of the rotor bearing 44. Accordingly, the collecting member 80 is configured to guide oil from the main oil passage 90 to the rotor bearing 44.
[0046] Figure 4 Shows details of a cross-sectional view of an embodiment of a drive unit from Figure 3 The oil flow direction of the oil guiding device is shown by dashed arrows in Figure 4 Oil flows from the main oil passage 90 through the guiding portion 83 of the collecting member 80 out of the wall portion 61 to the rotor bearing 44.
[0047] Figure 5 Shows a cross-sectional view of an embodiment of an oil guiding device. This embodiment includes all features of any of the foregoing embodiments. A cross-sectional view of Figure 3 is produced via the dashed line A-A in Figure 5 .
[0048] The wall portion 61 is configured to collect the thrown oil that is thrown in the circumferential direction during operation from the first gear set. For this purpose, the wall portion 61 includes a radial surface. The radial surface extends in the radial direction and is aligned in the axial direction. Accordingly, the radial surface of the wall portion 61 is aligned transversely to the circumferential direction. The radial surface is formed in the wall portion 61 at a wall region surrounding the main oil passage 90. As a result, the radial surface extends in the axial direction away from the end face of the wall portion 61 visible in Figure 5 . The oil flow intercepted by the wall portion 61 is indicated by dashed arrows.
[0049] Figure 6 Shows an embodiment of an oil guiding device. This embodiment includes all features of the embodiment described with reference to Figure 5 .
[0050] The input opening 81 protrudes axially beyond the end face of the wall portion 61. Accordingly, the collecting member 80 is configured such that the collecting member 80 can collect the oil dripping from the wall portion 61. Further, as in Figure 5 , the flow of the thrown oil intercepted by the radial surface of the wall portion 61 is indicated by dashed arrows.
[0051] Reference numeral
[0052] 4 Input element
[0053] 5 First output shaft
[0054] 10 First planetary gear set
[0055] 11 First sun gear of the first planetary gear set
[0056] 12 First planet carrier of the first planetary gear set
[0057] 13 First planet bolt of the first planetary gear set
[0058] 14 First planet gear of the first planetary gear set
[0059] 15 First ring gear of the first planetary gear set
[0060] 44 Rotor bearing
[0061] 61 Wall portion
[0062] 70 Stator
[0063] 71 Rotor
[0064] 80 Collection component
[0065] 81 Input opening
[0066] 82 Supply section
[0067] 83 Guide section
[0068] 84 Output opening
[0069] 85 Fastening section
[0070] 90 Main oil passage
[0071] X Direction of gravity.
Claims
1. A collecting component (80) for an oil guiding device, the oil guiding device comprising a wall portion (61), the collecting component (80) having an input opening (81), a supply portion (82), a guiding portion (83), an output opening (84) and a fastening portion (85), wherein The wall portion (61) forms a main oil passage (90). The fastening portion (85) is configured to fasten the collecting member (80) to the wall portion (61), The input opening (81) is arranged at the upper side of the collecting member (80) and is formed in sections by the supply portion (82), The output opening (84) is arranged at the lower side of the collecting member (80) and opposite to the supply portion (82) in the axial direction, The input opening (81) is configured to receive both oil dripping from the wall portion (61) and oil flowing out from the main oil gallery (90), and The guide portion (83) is configured to guide the oil from the wall portion (61) and the main oil gallery (90) to the output opening (84) in the axial direction.
2. The collecting component (80) according to claim 1, characterized in that The first radial surface and the second radial surface of the guide portion (83) are arranged opposite to each other in the circumferential direction and taper toward each other at an angle in the radial direction, and The first radial surface is configured to receive sling oil and is configured to be steeper than the second radial surface.
3. The collecting component (80) according to claim 1 or 2, characterized in that Axial surfaces arranged laterally in the axial direction are substantially parallel to each other.
4. The collecting member (80) according to any one of the preceding claims, characterized in that The guide portion (83) includes at least one step.
5. The collecting member (80) according to any one of the preceding claims, characterized in that The supply portion (82) bulges outward from the guide portion (83) in the axial direction so that the supply portion (82) is aligned with the main oil gallery (90).
6. The collecting member (80) according to any one of the preceding claims, characterized in that The guide (83) is configured such that it forms an oil volume which is delimited upwards by the input opening (81) and which includes the output opening (84) at the bottom.
7. An oil guiding device for a drive unit comprising an electric drive with a rotor (71), a rotor bearing (44) and a first gear set, the oil guiding device having a wall (61) and a collecting element (80) according to any one of claims 1 to 6, wherein The wall portion (61) forms the main oil passage (90). The wall portion (61) comprises a bearing seat for the rotor bearing (44), the bearing seat being formed such that the bearing seat is arranged in the axial direction within the rotor (71), and The output opening (84) is arranged adjacent to the bearing seat in the axial direction.
8. The oil guiding device for a drive unit according to claim 7, characterized in that The wall portion (61) is configured to collect thrown oil thrown in a circumferential direction from the first gear set during operation.
9. A drive unit for a vehicle, comprising an electric drive with a rotor (71), a rotor bearing (44), a first gear set, a second gear set, a first output shaft (5), a second output shaft and an oil guiding device according to claim 7 or 8, wherein: The rotor (71) is configured to transmit torque to the first gear set, The rotor bearing (44) rotatably supports the rotor (71) at the wall portion (61). The first gear set and the second gear set are mechanically operatively connected to each other so that torque can be transmitted from the first gear set to the second gear set. The first output shaft (5) is configured to output torque from the first gear set, and The second output shaft is configured to output torque from the second gear set.
10. The drive unit according to claim 9, characterized in that The first gear set is formed by a first planetary gear set (10), and The second gear set is formed by a second planetary gear set.
11. A vehicle having drive wheels and a drive unit according to claim 9 or 10, wherein The first output shaft (5) is configured to drive one of the drive wheels, and The second output shaft is configured to drive another one of the drive wheels.