Oil guide arrangement for a drive unit

Abstract

An oil guide arrangement comprises a stationary component (9), a sleeve (30), a rotor bearing (40) of an electric motor of a drive unit, and a transmission of the drive unit. The transmission has at least one first planetary gear set (10). The stationary component (9) is designed to fluidically connect the sleeve (30) to a lubricating oil supply of the drive unit. The sleeve (30) has a first oil channel (31) designed to supply the rotor bearing (40) with lubricating oil, a second oil channel (32) designed to supply a first sun gear (11) with lubricating oil, and a third oil channel (33) designed to supply a bearing of a first planet gear (14) on a first planet carrier (12) with lubricating oil. The rotor bearing (40) is mounted on the sleeve (30). The sleeve (30) is fastened to the stationary component (9).

Description

Technical area

[0001] The present invention relates to an oil guide arrangement for a drive unit, a drive unit for a vehicle and a vehicle. State of the art

[0002] An oil guide assembly supplies oil to various components of the drive unit for lubrication and cooling. Particularly in a drive unit comprising an electric machine with a stator and a rotor, a rotor bearing, and at least one first planetary gear set, a large number of oil channels are required to lubricate the components. This can result in a large number of parts. Furthermore, manufacturing and assembly can be complex. Description of the invention

[0003] A first aspect relates to an oil guide arrangement. The oil guide arrangement can be provided for a drive unit of a vehicle, such as a truck, passenger car, or work machine. A drive unit can be configured to provide driving force for driving the vehicle. The oil guide arrangement can comprise components and channels to enable lubrication of at least some components of the drive unit. The oil guide arrangement can be understood as part of the drive unit. Likewise, the drive unit can be understood as part of the oil guide arrangement. The oil guide arrangement comprises a stationary component, a sleeve, a rotor bearing of an electric motor of a drive unit, and a transmission of the drive unit.

[0004] The stationary component can, for example, be a component that never rotates during operation of the drive unit. For example, the stationary component can be fixed to a vehicle body. The sleeve can, for example, be designed as a rotationally symmetrical component. The sleeve can, for example, have a central through-hole. The rotor bearing can be designed to support a rotor of the electric motor. The rotor bearing can, for example, be designed as a deep groove ball bearing or a rolling bearing.

[0005] The electric motor can be designed, for example, as a synchronous machine or an asynchronous machine. The electric motor can be designed, for example, to convert electrical current into mechanical force. The electric motor can have a rotor and a stator. A drive force can be provided, for example, to the rotor by the electric motor. The drive force can be used to drive the vehicle for driving operation. The electric motor can, for example, have an axle drive. The electric motor is arranged, for example, coaxially with the sleeve, the transmission, and alternatively or additionally with the respective output shafts.

[0006] The transmission can be designed to provide power transmission. The transmission can provide a gear ratio which can be adjustable or fixed, for example. The transmission can, for example, alternatively or additionally provide a differential function. The transmission has at least one first planetary gear set. A planetary gear set can have three rotating elements, namely a sun gear, a planet carrier, and a ring gear. One or more sets of one or more planet gears can be rotatably mounted on the planet carrier of a planetary gear set. A planetary gear set can, for example, be designed as a minus planetary gear set or a plus planetary gear set. In the minus planetary gear set, respective planet gears mesh with both the sun gear and the ring gear.

[0007] The stationary component is designed to fluidically connect the sleeve to a lubricating oil supply of the drive unit. The lubricating oil supply can, for example, comprise an oil reservoir, such as an oil pan, and a means for building up pressure, such as a lubricating oil pump. One or more connecting parts, such as a hose or other components with an oil channel, can be provided between the lubricating oil pump and the stationary component. The stationary component can be fluidically connected directly to the sleeve, for example, by aligning two oil channels.

[0008] The sleeve has a first oil channel designed to supply the rotor bearing with lubricating oil. The sleeve has a second oil channel designed to supply a first sun gear with lubricating oil. The sleeve has a third oil channel designed to supply a bearing of a first planet gear on a first planet carrier with lubricating oil.

[0009] The first planetary gear and the first planetary carrier can be parts of the first planetary gear set. In general, the numbering of respective planetary gears and, alternatively or additionally, respective rotating elements can serve to assign them to an identically numbered planetary gear set. The first planetary gear set can have a plurality of first planetary gears, each of which can be rotatably mounted on the first planetary carrier. The bearing of each first planetary gear on the first planetary carrier can be supplied with lubricating oil through the third oil channel. For example, the planetary carrier rotates relative to the sleeve during operation, whereby each bearing of each of the first planetary gears can then pass at a facing opening of the third oil channel. The three oil channels can, for example, be fluidly connected to the stationary component. The rotor bearing is mounted on the sleeve. Accordingly, the rotor can be mounted on the sleeve, at least with the rotor bearing.The sleeve is attached to the stationary component, for example, by a screw connection and, alternatively or additionally, by a toothed connection. The sleeve can be secured in this way.

[0010] The sleeve, which is separate from the stationary component, simplifies manufacturing. For example, the stationary component can be a rotating element of a planetary gear set in the transmission. A complex oil channel geometry with three oil channels and the associated potential structural weakening of the stationary component due to three oil channels with corresponding openings can thus be avoided. The sleeve can also facilitate the rotor bearing, allowing the oil guide arrangement and thus the drive unit to be compact and have fewer components.

[0011] If a component is designed to fluidically connect two elements, the component provides a fluid connection between the two elements. For example, this component can conduct lubricating oil from one element to the other. If two elements are fluidly connected to one another, a fluid, for example oil, can flow from one element to the other. The fluid connection can be designed to be leak-free, so that the oil is conducted essentially completely from one element to the other. For this purpose, a seal, such as an O-ring or a labyrinth seal, can be provided between two elements.

[0012] If two elements are fastened to one another, they are directly or indirectly coupled in such a way that a movement of one element causes a reaction in the other element. For example, fastening can be provided by a positive or frictional connection. Additional elements can be provided between the elements. A rotationally fixed connection between two elements is understood to be a connection in which the two elements are rigidly coupled to one another in all intended states of the transmission. There can be intentional or unintentional slippage between the two elements. The elements can be present as individual components that are connected to one another in a rotationally fixed manner or as a single piece. A switching element, for example a clutch or brake, can, however, selectively establish or break a rotationally fixed connection between two elements.If, on the other hand, two elements are mechanically operatively connected, they are directly or indirectly coupled to one another in such a way that a movement of one element causes a reaction in the other. The mechanical operative connection can be formed by the meshing of corresponding gears of the two elements. Additional elements, such as one or more spur gear stages, can be provided between the elements.

[0013] The lubricating oil from the lubricating oil supply can flow essentially radially inward over the stationary component and the sleeve. Accordingly, respective channels in the stationary component can extend essentially radially. However, the respective channels can also have a partial axial extension, at least in sections, for example, in the direction of the rotor bearing. The lubricating oil supply can also be designed simply as an access or connection to a lubricating oil circuit of the vehicle. The lubricating oil supply can be supplied with oil, for example, pressurized oil, or lubricating oil via an oil supply device, for example, an oil pump.

[0014] Each of the three oil channels of the sleeve can have a throttle element, for example to specify a lubricating oil flow to the associated component to be lubricated. The throttle element can be formed by an oil orifice. The throttle element can be formed by a grub screw. The throttle element can be arranged at an end section in the oil flow direction in the associated oil channel. One of the oil channels can have an internal thread into which the associated throttle element is screwed. A volume flow through the respective oil channel can be specified by the throttle element. Alternatively or additionally, throttling can also be formed by a stepped bore.

[0015] An oil flow direction is the direction in which the lubricating oil moves within the oil guide arrangement during operation to reach the components being lubricated. In particular, the beginning of an oil channel is located upstream of an end of an oil channel in the oil flow direction. One end of an oil channel can be formed by an opening. At the opening, the lubricating oil can flow out of the component or oil channel, for example, toward the component to be lubricated and into the interior of a housing of the drive unit.

[0016] The first oil channel can conduct lubricating oil to a first planetary pin of the first planetary gear set via a collecting component connected to the first planetary carrier. The first planetary pin can form the bearing for the first planetary gear on the first planetary carrier. Accordingly, a dedicated first planetary pin can also be provided for each first planetary gear. The first planetary pin can be hollow and designed to lubricate the bearing of the first planetary gear on the planetary pin.

[0017] The first oil channel, the second oil channel, and the third oil channel are fluidly connected to the lubricating oil supply of the drive unit via the stationary component. The sleeve can have a distributor oil channel, which is in fluid communication with at least one of the first oil channel, the second oil channel, and the third oil channel. For example, the distributor oil channel is fluidly connected to the first oil channel, the second oil channel, and the third oil channel. The distributor oil channel can be connected to an oil channel of the stationary component, for example directly or indirectly. The first oil channel, the second oil channel, and the third oil channel can be in fluid communication with the lubricating oil supply via the distributor oil channel. The distributor oil channel can be formed by a radial bore in the sleeve. The distributor oil channel can be formed by a groove in the sleeve, wherein an open side of the groove is at least partially closed by the stationary component.The distributor oil channel can be configured to run circumferentially in a circumferential direction. The distributor oil channel can be annular. The circumferential direction can relate to a rotational axis of the first sun gear and, alternatively or additionally, of the rotor of the electric motor. The distributor oil channel can be formed on an outer or inner circumference of the sleeve. The distributor oil channel can have a greater extent in a radial direction than in an axial direction. The axial direction can be defined by the rotational axis of the first sun gear and, alternatively or additionally, of the rotor of the electric motor. The radial direction can also be defined by the rotational axis of the first sun gear and, alternatively or additionally, of the rotor of the electric motor and, for example, be orthogonal to the axial direction. The distributor oil channel can be delimited jointly by the sleeve and the stationary component.The distributor oil passage may intersect at least the first oil passage, the second oil passage and alternatively or additionally the third oil passage.

[0018] At least one of the first oil channel, the second oil channel, and the third oil channel can be configured as a bore. At least two of the first oil channel, the second oil channel, and the third oil channel can be configured as bores with the same diameter. For example, the first oil channel and the third oil channel can be formed by a common through-bore. At least one of the first oil channel, the second oil channel, and the third oil channel can have the same diameter as at least one of the bores of the lubricating oil supply. Several of at least one of the first oil channel, the second oil channel, and the third oil channel can be arranged in the circumferential direction, for example evenly distributed. However, the sleeve can also, for example, have only exactly one first oil channel, exactly one second oil channel, and alternatively or additionally exactly one third oil channel. The oil channels can have been created by post-machining the sleeve.The sleeve can, for example, be designed as a cast component.

[0019] The sleeve can form a bearing seat for receiving the rotor bearing. The sleeve can have the bearing seat on an inner circumference of a portion for receiving an outer ring of the rotor bearing. The bearing seat can be cylindrical. The bearing seat can be arranged at an end portion of the sleeve on a side on which the electric motor is arranged. The bearing seat can be created by post-machining the sleeve. In the axial region of the bearing seat, the sleeve can, for example, be free of the three oil channels and also other oil channels. This allows the sleeve to withstand high loads well in this area.

[0020] The sleeve can be formed at least in sections from metal, for example from steel. The sleeve can extend in the axial direction. The sleeve can have a fitting surface. The sleeve can be fitted into the stationary component via the fitting surface. The fitting surface can be arranged on an end section of the sleeve on a side on which the electric motor is arranged. The fitting surface can be formed on an outer circumference of a section of the sleeve. The fitting surface can be created by post-machining the sleeve. The sleeve can be screwed to the stationary component.

[0021] The sleeve can be annular. The sleeve can have an elliptical outer circumference. The elliptical outer circumference can provide an anti-rotation feature. The sleeve can also have a toothing for the anti-rotation feature. The sleeve can have an axial contact surface against which a preload element bears in the axial direction. The axial contact surface can extend circumferentially in the circumferential direction. The axial contact surface can be formed by a stepped section.

[0022] The stationary component can be designed such that it extends in the axial direction between the gear unit and the rotor. The stationary component can have a receiving section for receiving the sleeve. The receiving section can be designed to fasten the sleeve to the stationary component in a rotationally secure manner, for example by means of a toothing or elliptical shape corresponding to the sleeve. The receiving section can be designed to position the sleeve in the axial direction. The sleeve can be axially fastened, for example, by a stop on the stationary component and alternatively or additionally by a snap ring. The receiving section can have an axial contact surface against which the sleeve bears. The axial contact surface can extend inward in the radial direction. The axial contact surface can extend circumferentially. The axial contact surface can be formed by a stepped section.The axial contact surface can form the stop for the axial positioning of the sleeve.

[0023] The receiving portion may have a radial contact surface. The radial contact surface may be arranged in the axial direction at an end portion on a side of the stationary component facing the electric motor. The radial contact surface may have a mating surface via which the sleeve is fitted into the stationary component. The mating surface or the receiving portion as a whole may provide a frictional connection, for example, a press fit, with the sleeve. The sleeve may be pressed into the stationary component via the mating surface.

[0024] This allows the sleeve to provide high positioning accuracy for the rotor bearing. The sleeve can enable tolerance compensation for the rotor bearing. For example, the sleeve can compensate for a positional deviation of the rotor's rotational axis. This compensation can be effective, for example, at high temperatures or during significant temperature changes.

[0025] In one embodiment of the oil guide arrangement, the sleeve can have a bearing area and an oil distribution area. The bearing area can form the bearing seat for the rotor bearing. The oil distribution area can form the first oil channel, the second oil channel, and the third oil channel. The bearing area and oil distribution area can be formed by a common component, for example, if the sleeve is formed as a single piece. The oil guide arrangement can then have particularly few components. The bearing area can be made of metal, for example, steel.

[0026] In one embodiment of the oil guide arrangement, the sleeve can be designed in two parts, comprising a bearing element and an oil distribution element. The bearing area can be formed by the bearing element, and the oil distribution area can be formed by the oil distribution element. The two-part design makes it particularly easy to manufacture bearing surfaces and oil channels. Furthermore, different materials can be used for the bearing element and the oil distribution element as needed.

[0027] The bearing element can be made of metal, for example steel. The oil distribution element can be made of a different material than the bearing element, for example plastic. This allows the oil guide arrangement to be lightweight and cost-effective. The oil distribution element can be attached to the bearing element. The oil distribution element can be attached to the bearing element, for example by means of one or more clips and alternatively or additionally screwed to the bearing element. A snap connection, for example by projections on the oil distribution element designed as a plastic element, is another possible example. A cross-section of the clip can extend in the circumferential direction. The clip can be aligned in the axial direction so that the oil distribution element can be attached to the bearing element by a movement in the axial direction relative to the bearing element.

[0028] In one embodiment of the oil guide arrangement, the bearing region can at least partially form a connecting oil channel between the oil distribution region and the stationary component. The connecting oil channel can be in fluid communication with the lubricating oil supply. The connecting oil channel can be formed by the distributor oil channel. The connecting oil channel can have a groove. The connecting oil channel can be formed by a groove. The connecting oil channel can be partially delimited by the stationary component. For example, the stationary component can at least partially close the groove. The connecting oil channel can have a bore, for example in the sleeve. The connecting oil channel can be formed by a bore, for example in the sleeve. The connecting oil channel can extend in the axial direction. The connecting oil channel can open into the distributor oil channel.The connecting oil passage can extend from a fourth oil passage (described later) to the distributor oil passage. The connecting oil passage can be formed in a region of the mating surface of the sleeve. The connecting oil passage can have a plurality of grooves distributed in the circumferential direction. The grooves can be evenly distributed in the circumferential direction. However, the connecting oil passage can also be formed by just one groove or one bore.

[0029] In one embodiment of the oil guide arrangement, the oil guide arrangement can further comprise a preloading element that bears against the sleeve and preloads the rotor bearing in an axial direction against a stop. The stop can be formed, for example, by the electric motor, a rotating element of the electric motor, or a rotating element connected in a rotationally fixed manner to the rotating element. The rotor bearing can be preloaded in the direction of the electric motor by the preloading element. The preloading element can ensure axial positioning of the rotor bearing. The preloading element can be designed, for example, as a spring element. For example, the preloading element can be designed as a wave spring, disc spring, spring washer, or spiral spring.

[0030] The preload element can bear against the oil distribution area or oil distribution element and alternatively or additionally against the bearing area or bearing element. The preload element can bear against the sleeve in the axial direction. The preload element can bear against the bearing seat for the rotor bearing formed by the sleeve in the radial direction. The preload element can bear against the axial contact surface of the sleeve. The preload element can be arranged between the rotor bearing and the oil distribution area. The preload element can, for example, bear against an outer ring of the rotor bearing.

[0031] In one embodiment of the oil guide arrangement, the stationary component can have a fourth oil channel, which is designed for the fluidic connection of the sleeve to the lubricating oil supply of the drive unit. The fourth oil channel can extend radially through the stationary component, for example. The fourth oil channel can extend inward from the lubricating oil supply in the radial direction. The fourth oil channel can extend from an end adjacent to the lubricating oil supply to the first planetary gear set. The fourth oil channel can extend axially to the rotor bearing at an end adjacent to the sleeve. The fourth oil channel can be designed as a bore. The fourth oil channel can have an outer bore that is arranged on the outside in the radial direction. The fourth oil channel can have an inner bore that is arranged on the inside in the radial direction.The outer bore and the inner bore can be in fluid communication with one another. The outer bore can extend substantially radially. The inner bore can extend from the outer bore in the direction of the rotor bearing. The fourth oil channel can thus be easily manufactured by two bores on radially opposite sides. An opening of the fourth oil channel adjacent to the sleeve can open into the oil distribution region. Alternatively, this opening can also be closed, for example by the sleeve, and the fourth oil channel can be connected to the distributor oil channel and alternatively or additionally to the oil distribution region via a further oil channel, such as the connecting oil channel and alternatively or additionally to the fifth oil channel described later. The fourth oil channel can be formed by two bores aligned at an angle to one another which intersect.The stationary component can have only the fourth oil channel and exactly one fourth oil channel. The fourth oil channel can have a throttle element to regulate the flow of lubricating oil from the lubricating oil supply to the sleeve and, if necessary, other components and channels. The throttle element can be configured as described above. The fourth oil channel can extend completely through the stationary component or end at an intersection with another oil channel, such as the fifth oil channel.

[0032] In one embodiment of the oil guide arrangement, the stationary component can have a fifth oil channel, which is designed for a fluidic connection of a rotor of the electric motor with the lubricating oil supply of the drive unit. The fifth oil channel can be connected directly to the lubricating oil supply or indirectly, for example via the fourth oil channel. The fourth oil channel and the fifth oil channel can be fluidic connected to one another. The fourth oil channel and the fifth oil channel can intersect. The fifth oil channel can be designed as a bore. The fourth and fifth oil channels can have the same diameter. The fourth and fifth oil channels can have different diameters. The fifth oil channel can, for example, open with one end adjacent to the rotor and with an opposite end adjacent to the sleeve, for example adjacent to the oil distribution region.For example, an end of the fifth oil channel facing away from the rotor can be fluidly connected to the sleeve, for example, the distributor oil channel. The fifth oil channel can, for example, open with one end adjacent to the rotor and open with an opposite end into the fourth oil channel. The fifth oil channel can extend completely through the stationary component or end at an intersection with another oil channel, such as the fourth oil channel. The fifth oil channel can have a throttle element to adjust a lubricating oil flow from the lubricating oil supply to the sleeve and, alternatively or additionally, to the rotor.

[0033] In one embodiment of the oil guide arrangement, the second oil channel can have an opening which is aligned with a toothing of the first sun gear. The toothing of the first sun gear can mesh, for example, with respective first planet gears. The opening can be an opening of the second oil channel from which lubricating oil can flow. The second oil channel can run radially from the inside outwards in the radial direction to the opening. The second oil channel can be oriented at an angle to the first sun gear with respect to the radial direction. The second oil channel can be oriented above the axis of rotation of the first sun gear in a direction of gravity. The second oil channel can be oriented at an angle downwards in the direction of gravity with respect to the axial direction. The second oil channel can be arranged closer to the axis of rotation of the first sun gear in the radial direction than the third oil channel.The second oil channel can be arranged radially inward of the third oil channel, at least partially in the same axial region as the third oil channel. The second oil channel can extend axially and radially from the distributor oil channel to the first planetary gear set. The second oil channel can be formed by a bore. The diameter of the bore of the second oil channel can be smaller than a diameter of a bore of the first oil channel and the third oil channel. The second oil channel can have a stepped bore. The second oil channel can form a throttle element. This makes it possible to adjust the volume flow of lubricating oil. The volume flow in the second oil channel and other oil channels can also be predetermined by a bore diameter.

[0034] In one embodiment of the oil guide arrangement, the first oil channel and the third oil channel can open in the axial direction on opposite sides of the sleeve. The first oil channel and the third oil channel can extend to opposite sides in the sleeve. At least one of the first oil channel and the third oil channel can be aligned in the axial direction. The first oil channel and the third oil channel can extend purely in the axial direction. The first oil channel can open on a side of the sleeve that faces the electric motor. The third oil channel can open on a side of the sleeve that faces the first planetary gear set and alternatively or additionally faces away from the electric motor. The first oil channel and the third oil channel can be arranged offset from one another in the radial direction. The first oil channel and the third oil channel can be arranged coaxially to one another.The first oil channel and the third oil channel can have the same oil channel axis. The first oil channel and the third oil channel can be formed by a common bore. This makes manufacturing particularly simple and cost-effective. At least one of the first oil channel and the third oil channel can be arranged radially within an outer circumference of the rotor bearing. At least one of the first oil channel and the third oil channel can be arranged radially within an outer circumference of the outer ring of the rotor bearing.

[0035] At least one of the first oil channel and the third oil channel can have a throttle element. For example, both the first oil channel and the second oil channel have an associated throttle element. The throttle element can be designed as described above. A volume flow of lubricating oil can be adjusted by the throttle element. For example, despite the first oil channel and the third oil channel being formed by a common bore, the volume flow of lubricating oil to the rotor bearing and the bearing of respective first planetary gears can be different. For example, each throttle element designed as a grub screw can have a different diameter for a central through-opening in the grub screw.

[0036] In one embodiment of the oil guide arrangement, the transmission can further comprise an input element, a first output shaft, a second output shaft, and a second planetary gear set. The first planetary gear set can comprise at least a first rotating element, a second rotating element, and a third rotating element. The second planetary gear set can comprise at least a first rotating element, a second rotating element, and a third rotating element. The first rotating element of the first planetary gear set can be rotationally fixedly connected to an input element. The first rotating element can be formed by the first sun gear. The input element can be connected to the rotor for receiving torque. The second rotating element of the first planetary gear set can be rotationally fixedly connected to the first output shaft. The third rotating element of the first planetary gear set can be rotationally fixedly connected to the first rotating element of the second planetary gear set.The second rotating element of the second planetary gear set can be connected in a rotationally fixed manner to the stationary component. The third rotating element of the second planetary gear set can be connected in a rotationally fixed manner to the second output shaft.

[0037] The first planetary gear set may include the first sun gear, the first planet carrier, the first planet pin, the first planet gear, and a first ring gear. The first planetary gear set may, for example, include four first planet pins and four first planet gears. The first sun gear may mesh with the respective first planet gears. The first ring gear may mesh with the respective first planet gears. The first planet gear may be rotatably mounted on the first planet pin. The first planet pin may be connected to the first planet carrier.

[0038] The second planetary gear set may have a second sun gear, a second planet carrier, a second planet pinion, a second planet gear, and a second ring gear. The numbering is for identification purposes, and the second planetary gear set may, for example, have only a single sun gear. The second planetary gear set may have multiple second planet pinions and multiple second planet gears. The second sun gear may mesh with the respective second planet gears. The second ring gear may mesh with the respective second planet gears. The second planet gear may be rotatably mounted on the second planet pinion. The second planet pinion may be connected to the second planet carrier.

[0039] The first and second planetary gear sets can be designed as a negative planetary gear set or as a positive planetary gear set. The stationary component can be formed by a planet carrier of one of the planetary gear sets, for example, the second planetary gear set.

[0040] If the first or second planetary gear set is designed as a negative planetary gear set, the respective second rotating element can be formed by the planet carrier. The respective third rotating element can then be formed by the ring gear. The third rotating element of the first planetary gear set and the first rotating element of the second planetary gear set can be connected to one another in a rotationally fixed manner, for example by being formed integrally. For example, the third rotating element of the first planetary gear set and the first rotating element of the second planetary gear set can be formed by a sun ring gear.

[0041] If the first or second planetary gear set is designed as a positive planetary gear set, the respective second rotating element can be formed by the ring gear. The respective third rotating element can then be formed by the planet carrier.

[0042] The first planetary gear set and the second planetary gear set can be arranged in the same plane in the axial direction. The second planetary gear set can be arranged outside the first planetary gear set in the radial direction. The first planetary gear set and the second planetary gear set can also be arranged offset from one another in the axial direction.

[0043] The first output shaft and the second output shaft can be arranged coaxially with the input element. The first output shaft can extend through the input element in the axial direction. The first output shaft can extend at least partially in the axial direction within the second output shaft. The first output shaft can be rotatably mounted in the second output shaft. The first and second output shafts can extend in opposite directions in the axial direction.

[0044] The transmission may function as a differential. The transmission may be configured to distribute torque from the input element to the first output shaft and the second output shaft.

[0045] In one embodiment of the oil guide arrangement, the stationary component can be formed by the second planet carrier.

[0046] A second aspect relates to a drive unit, for example, of a motor vehicle. The drive unit has an oil guide arrangement according to the first aspect. Respective further features, embodiments, and advantages can be found in the descriptions of the first aspect. Conversely, features, embodiments, and advantages of the second aspect also represent features, embodiments, and advantages of the first aspect. The drive unit has an electric motor, the rotor of which is rotatably mounted on the sleeve via the rotor bearing of the oil guide arrangement. The electric motor can form a traction motor of the drive unit.

[0047] The rotor can be supported by a second rotor bearing. The second rotor bearing can be arranged at an end of a rotor shaft opposite the previously described rotor bearing in the axial direction. The electric motor, the rotor bearing, the sleeve, the gearbox or the planetary gear sets, and their gears can be arranged in this order in the axial direction.

[0048] In one embodiment of the drive unit, the drive unit may have an input element that extends through the sleeve in the axial direction. The input element may be arranged coaxially with the first sun gear. The input element may form the first sun gear at an end portion or be rotationally fixedly connected to the first sun gear.

[0049] A third aspect relates to a vehicle, for example, a motor vehicle. The vehicle has a drive unit according to the second aspect and, alternatively or additionally, an oil guide arrangement according to the first aspect. Further features, embodiments, and advantages can be found in the descriptions of the first and second aspects. Conversely, features, embodiments, and advantages of the first and second aspects, respectively, also represent features, embodiments, and advantages of the third aspect. The vehicle has at least two output elements, wherein the two output elements can be driven by the electric motor via the transmission.

[0050] An output element can be designed as a wheel or a track. The vehicle can be stationary with the output elements, for example, on a surface. The electric motor of the drive unit can be configured to drive the input element. One of the output elements can be configured to drive the vehicle via the first output shaft. The other of the output elements can be configured to drive the vehicle via the second output shaft. Short description of the characters Fig. 1 shows a sectional view of a first embodiment of an oil guide arrangement. Fig. 2 shows a further sectional view of the first embodiment of the oil guide arrangement. Fig. 3 shows a sectional view of a second embodiment of the oil guide arrangement. Fig. 4 shows a sectional view of a third embodiment of the oil guide arrangement. Detailed description of embodiments

[0051] Fig. Figure 1 shows a sectional view of a first embodiment of an oil guide assembly for a drive unit of a vehicle. The oil guide assembly comprises a stationary component 9, a sleeve 30, a rotor bearing 40 of an electric motor, and a transmission. The electric motor has a stator 70 and a rotor 71. The transmission has a first planetary gear set 10 and a second planetary gear set 20. The stationary component 9 is designed to fluidly connect the sleeve 30 to a lubricating oil supply of the drive unit. Fig. 1 shows essentially only a lower half of the gear and a central axis of rotation is in the image plane of Fig. 1 arranged at the top.

[0052] The sleeve 30 has a first oil channel 31, a second oil channel 32, and a third oil channel 33 in an oil distribution area. The first oil channel 31 is designed to supply the rotor bearing 40 with lubricating oil. The second oil channel 32 is designed to supply a first sun gear 11 of the first planetary gear set 10 with lubricating oil. The third oil channel 33 is designed to supply a bearing of a first planet gear 14 of the first planetary gear set 10 on a first planet carrier 12 of the first planetary gear set 10 with lubricating oil. The stationary component 9 has a fourth oil channel 94 for the fluidic connection of the sleeve 30 to a lubricating oil supply of the drive unit. The first planetary gear set 10 and the rotor bearing 40 are thus easily supplied with lubricating oil from the lubricating oil supply.

[0053] The rotor bearing 40, in this case a deep groove ball bearing, is mounted on an inner circumference of a bearing seat of a bearing region of the sleeve 30. The bearing region and the oil distribution region of the sleeve 30 are formed integrally and arranged axially adjacent to one another. An outer circumference of the bearing region of the sleeve 30 is frictionally secured via a press fit to an inner circumference of a section of the stationary component 9. The stationary component 9 is attached to a transmission housing.

[0054] The first planetary gear set 10 has, in addition to the first sun gear 11, a plurality of first planet gears 14, and the first planet carrier 12, a corresponding plurality of first planetary pinions 13 and a first ring gear 15. The first sun gear 11 is formed by an input element 4, which is rotationally fixedly connected to the rotor 71. The first sun gear 11 meshes with the first planet gears 14. The first planet gears 14 mesh with the first ring gear 15 and are each rotatably mounted on an associated one of the first planetary pinions 13. The first planetary pinions 13 are connected to the first planet carrier 12. The first planet carrier 12 is rotationally fixedly connected to a first output shaft 5.

[0055] The second planetary gear set 20 includes a second sun gear 21, a second planet carrier, a plurality of second planet pinions, a corresponding plurality of second planet gears, and a second ring gear. The second planet gears are each rotatably mounted on one of the second planet pinions. The second sun gear 21 meshes with the second planet gears. The second planet gears mesh with the second ring gear and are each rotatably mounted on one of the second planet pinions. The second planet pinions are connected to the second planet carrier. The second planet carrier forms the stationary component 9.

[0056] The first ring gear 15 and the second sun gear 21 are formed by a sun ring gear 1 and are thus rotationally fixed. The sun ring gear 1 has a toothing of the first ring gear 15 on an inner circumference. The sun ring gear 1 has a toothing of the second sun gear 21 on an outer circumference. The first planetary gear set 10 and the second planetary gear set 20 are arranged at least partially in the same axial region. The second planetary gear set 20 is arranged radially outside the first planetary gear set 10. The first output shaft 5, the input element 4, the sleeve 30, the first planetary gear set 10 and the second planetary gear set 20 are coaxial with one another and arranged radially from the inside to the outside in this region. The input element 4 and the first output shaft 5 extend through the sleeve 30 in the axial direction.

[0057] A lubricating oil supply is connected to the stationary component at a fourth oil channel 94, which extends radially from the outside to the inside in the stationary component 9. The lubricating oil supply is supplied with lubricating oil by an oil supply device, which in this case is formed by an oil pump. A fifth oil channel 95 intersects the fourth oil channel 94, the diameter of the two bores being the same. The fifth oil channel 95 fluidly connects a distribution oil channel 34 of the sleeve 30 to the fourth oil channel 94 and thus to the lubricating oil supply. The fourth oil channel 94 ends at the sleeve 30 and is closed by the latter at an end opposite the lubricating oil supply. The fifth oil channel 95 opens into the distribution oil channel 34 at one end. At an opposite end, the fifth oil channel 95 opens into an interior space and is aligned with the rotor 71 for its lubricating oil supply.

[0058] The distributor oil channel 34 is arranged in the oil distribution area of ​​the sleeve 30. The distributor oil channel 34 is formed by an annular groove in the sleeve 30, which extends in a circumferential direction. The groove has a greater extent radially than in the axial direction. In the area in which the fifth oil channel 95 does not open into the distributor oil channel 34, the groove is closed by the stationary component 9. The distributor oil channel 34 is sealed from the first planetary gear set 10 by a sealing element 60, in this case an O-ring. The sealing element 60 is arranged sealingly in the radial direction between the stationary component 9 and the sleeve 30. The distributor oil channel 34 is fluid-tightly sealed from the electric motor by the press fit between the sleeve 30 and the stationary component 9.The first oil channel 31, the second oil channel 32 and the third oil channel 33 extend from the distributor oil channel 34 and are thereby fluidly connected thereto.

[0059] The fifth oil channel 95 is also provided for a fluidic connection of the rotor 71 of the electric motor with the lubricating oil supply of the drive unit. The fifth oil channel 95 extends from the inner bore of the lubricating oil supply in the radial direction outwards and in the axial direction towards the rotor 71. At an end portion at one end of the fifth oil channel 95 in a Fig. 2, the fifth oil channel 95 has a thread into which a throttle element, in this case a grub screw with a central through-opening, is screwed.

[0060] The first oil channel 31 extends from the distributor oil channel 34 in the axial direction toward the electric motor. The first oil channel 31 is arranged radially inside the bearing seat of the bearing area of ​​the sleeve 30. The first oil channel 31 and the third oil channel 33 are jointly formed by a cylindrical bore in the sleeve 30. The first oil channel 31 has a thread into which a throttle element, in this case a grub screw with a central through-hole, is screwed.

[0061] The third oil channel 33 extends from the distributor oil channel 34 in the axial direction toward the first planetary gear set 10. The third oil channel 33 is also arranged radially inside the bearing seat of the bearing area of ​​the sleeve 30. The third oil channel 33 is coaxial with the first oil channel 31. The common bore is interrupted and intersected centrally by the distributor oil channel. The third oil channel 33 opens further inward in the radial direction than a rotational axis of one of the first planet gears 14. Lubricating oil emerging from the third oil channel 33 is collected in the radial direction by a collecting component 8, which is connected to the first planet carrier 12. The collecting component 8 guides the lubricating oil in the axial direction to the first planetary pins 13. The third oil channel 33 has a thread into which a throttle element, in this case an oil orifice, is screwed.The first oil channel 31 and the third oil channel 33 open on axially opposite sides of the sleeve 30.

[0062] The second oil channel 32 extends from the distribution oil channel 34 in the axial direction and in the radial direction such that an opening of the second oil channel 32 is aligned with a toothing of the first sun gear 11. The second oil channel 32 is inclined inward in the radial direction starting from the distribution oil channel 34. The second oil channel 32 is arranged radially further inward relative to the third oil channel 33. The second oil channel 32 is formed by a cylindrical bore having a smaller diameter than the first oil channel 31 and the third oil channel 33.

[0063] An outer ring of the rotor bearing 40 is mounted on an inner circumference of the bearing area of ​​the sleeve 30. The rotor bearing 40 is preloaded in the axial direction against a stop to the electric motor via a preload element 50. The preload element 50 is formed by a spring washer. The preload element is axially supported on an end face of the oil distribution area of ​​the sleeve 30, with the first oil channel 31 opening into this end face. The preload element 50 is arranged axially in the bearing area of ​​the sleeve 30 between this end face and the rotor bearing 40.

[0064] In a further embodiment, the sleeve 30 can be formed in two parts, with the bearing region being formed by a bearing element and the oil distribution region by an oil distribution element. The oil distribution element and the bearing element are then fastened to one another. The bearing element is made of metal. The oil distribution element is made of plastic. In a further embodiment, a plurality of first oil channels 31, second oil channels 32, and third oil channels 33 are arranged evenly distributed in the circumferential direction.

[0065] Fig. 2 shows a further sectional view of the first embodiment of the oil guide arrangement. In Fig. 2 the oil flow direction is shown by thick arrows.

[0066] Fig. Figure 3 shows a sectional view of a second embodiment of the oil guide arrangement. The present embodiment has all the features of one of the previous embodiments. The present embodiment differs from the previous embodiments by a different design of the fifth oil channel 95 and an additional connecting oil channel 91.

[0067] In the second embodiment, the fourth oil channel 94 also extends radially inward from the lubricating oil supply and axially to the rotor bearing 40. However, the fourth oil channel 94 is not closed there by the sleeve 30, but opens into the connecting oil channel 91. The fifth oil channel 95 no longer connects the fourth oil channel 94 with the distribution oil channel 34. Instead, the fifth oil channel 95 ends at its intersection with the fourth oil channel 94. In the second embodiment, the fourth oil channel 94 fluidically connects the lubricating oil supply directly to the sleeve 30 without the fifth oil channel 95.

[0068] The connecting oil channel 91 is formed by an inner circumference of a portion of the stationary component 9 and the bearing area of ​​the sleeve 30 and can be considered part of the distributor oil channel 34. The connecting oil channel 91 is formed by a groove in the bearing area of ​​the sleeve 30, which groove extends in the axial direction. In one embodiment, the groove is annular in the circumferential direction. In another embodiment, the groove is provided only in a limited circumferential area. Outside the opening of the fourth oil channel 94, the groove is closed by the stationary component 9, thus forming the connecting oil channel 91.

[0069] Fig. Figure 4 shows a sectional view of a third embodiment of the oil guide arrangement. The present embodiment has all the features of one of the previous embodiments. The sectional view runs through the first oil channel 31, through the second oil channel 32, and through the third oil channel 33. The second oil channel 32 is arranged in the radial direction relative to a rotational axis of the first sun gear 11 opposite to the first oil channel 31 and the third oil channel 33. The second oil channel 32 is in a direction of gravity, the vertical direction in Fig. 4, arranged at the top. This utilizes gravity to transport lubricating oil from the second oil channel 32 to the teeth of the first sun gear 11. Reference symbol 1 sun gear 4 Input element 5 First output shaft 8 Catchment component 9 Stationary component 10 First planetary gear set 11 First sun gear 12 First planet carrier 13 First planetary bolt 14 First planetary gear 15 First ring gear 20 Second planetary gear set 21 Second sun gear 30 sleeve 31 First oil channel 32 Second oil channel 33 Third oil channel 34 Distributor oil channel 40 rotor bearings 50 preload element 60 sealing element 70 Stator 71 Rotor 91 connecting oil channel 94 Fourth oil channel 95 Fifth oil channel

Claims

[1] Oil guide arrangement with a stationary component (9), a sleeve (30), a rotor bearing (40) of an electric motor of a drive unit and a transmission of the drive unit, wherein the transmission has at least one first planetary gear set (10), wherein the stationary component (9) is designed to fluidically connect the sleeve (30) to a lubricating oil supply of the drive unit, wherein the sleeve (30) has a first oil channel (31) which is designed to supply the rotor bearing (40) with lubricating oil, a second oil channel (32) which is designed to supply a first sun gear (11) with lubricating oil, and a third oil channel (33) which is designed to supply a bearing of a first planet gear (14) on a first planet carrier (12) with lubricating oil, wherein the rotor bearing (40) is mounted on the sleeve (30), and wherein the sleeve (30) is fastened to the stationary component (9). [2] Oil guide arrangement according to claim 1, characterized by in that the sleeve (30) has a bearing region and an oil distribution region, wherein the bearing region forms a bearing seat for the rotor bearing (40), and wherein the oil distribution region forms the first oil channel (31), the second oil channel (32) and the third oil channel (33). [3] Oil guide arrangement according to claim 2, characterized by that the sleeve (30) is formed in two parts with a bearing element and an oil distribution element, wherein the bearing area is formed by the bearing element and the oil distribution area is formed by the oil distribution element. [4] Oil guide arrangement according to claim 2 or 3, characterized by that the bearing area at least partially forms a connecting oil channel (91) between the oil distribution area and the stationary component (9). [5] Oil guide arrangement according to one of the preceding claims, characterized bythat the oil guide arrangement further comprises a prestressing element (50) which bears against the sleeve and prestresses the rotor bearing (40) in an axial direction against a stop. [6] Oil guide arrangement according to one of the preceding claims, characterized by that the stationary component (9) has a fourth oil channel (94) which is designed for the fluidic connection of the sleeve (30) to the lubricating oil supply of the drive unit. [7] Oil guide arrangement according to one of the preceding claims, characterized by that the stationary component (9) has a fifth oil channel (95) which is designed for a fluidic connection of a rotor (71) of the electric motor with the lubricating oil supply of the drive unit. [8] Oil guide arrangement according to one of the preceding claims, characterized by that the second oil channel (32) has an opening which is aligned with a toothing of the first sun gear (11). [9] Oil guide arrangement according to one of the preceding claims, characterized by that the first oil channel (31) and the third oil channel (33) open in the axial direction on opposite sides of the sleeve (30). [10] Oil guide arrangement according to one of the preceding claims, characterized bythat the transmission further comprises an input element (4), a first output shaft (5), a second output shaft and a second planetary gear set (20), wherein the first planetary gear set (10) comprises at least a first rotating element, a second rotating element and a third rotating element and the second planetary gear set (20) comprises at least a first rotating element, a second rotating element and a third rotating element, wherein the first rotating element of the first planetary gear set (10) is rotationally fixedly connected to the input element (4), wherein the second rotating element of the first planetary gear set (10) is rotationally fixedly connected to the first output shaft (5), wherein the third rotating element of the first planetary gear set (10) is rotationally fixedly connected to the first rotating element of the second planetary gear set (20), wherein the second rotating element of the second planetary gear set (20) is fixed,and wherein the third rotary element of the second planetary gear set (20) is rotationally fixedly connected to the second output shaft (6)., [11] Oil guide arrangement according to one of the preceding claims, characterized by that the stationary component (9) is formed by a second planet carrier. [12] Drive unit with an oil guide arrangement according to one of the preceding claims and an electric motor, the rotor (71) of which is rotatably mounted on the sleeve (30) via the rotor bearing (40) of the oil guide arrangement. [13] Drive unit according to claim 12, characterized by that the drive unit has an input element (4) which extends in the axial direction through the sleeve (30). [14] Vehicle with a drive unit according to claim 12 or 13 and at least two output elements, wherein the two output elements can be driven by the electric motor via the transmission.

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