Oil guide device

Abstract

An oil guide device has a planetary gear set (10) with a sun gear (11), at least two planetary gears (14) and a planetary carrier (12), and a guiding element (30). The sun gear (11) meshes with the planetary gears (14). The guiding element (30) surrounds an outer circumference of the sun gear (11) in sections. The guiding element (30) is attached to the planetary carrier (12). The guiding element (30) is arranged in a circumferential direction between two planetary gears (14) which are adjacent in the circumferential direction. The guiding element (30) has a guiding surface which has a front end section (36) and a rear end section (35). The guiding element (30) extends from the rear end section (35) in the direction of rotation of the sun gear (11) on the outer circumference of the sun gear (11) to the front end section (36). The guiding surface is designed to discharge oil from the front end section (36) of the guiding element (30) in the direction of rotation, whereas the guiding surface is designed to limit a discharge of oil from the rear end section (35) of the guiding element (30) counter to the direction of rotation.

Description

[0001] Oil guide device

[0002] Technical area

[0003] The present invention relates to an oil guide device, a transmission with an oil guide device and a vehicle with a transmission.

[0004] State of the art

[0005] Oil-guided devices for lubricating and cooling a rotating spur gear meshing with a counter-spur gear are known. Especially in automotive applications, the power density requirements are very high, so effective cooling is correspondingly important.

[0006] Description of the invention

[0007] It is an object of the present invention to provide an improved oil guide device with which sufficient cooling of transmission elements can be ensured.

[0008] The object is achieved with an oil guide device having the features of claim 1. Advantageous further developments are the subject of the dependent claims.

[0009] An oil guide device comprises a planetary gear set comprising a sun gear, at least two planetary gears, and a planetary carrier, and a guide element. The planetary gear set may be formed by a first planetary gear set. The sun gear may be formed by a first sun gear. The planetary gear may be formed by a first planetary gear. The planetary carrier may be formed by a first planetary carrier. The oil guide device can be used in a transmission for a vehicle, for example a passenger car, a truck, or another commercial vehicle. The transmission may have a stationary component, for example a transmission housing. The first planetary gear set may be configured to be coupled to a second planetary gear set.

[0010] The first sun gear meshes with the first planet gears. The first sun gear can be rotatable about a rotational axis of the first sun gear. The first planet carrier can be rotatable about the rotational axis. The first sun gear can rotate in a preferred direction of rotation about the rotational axis. The preferred direction of rotation can form a direction of rotation of the sun. When the oil guide device is used as intended, the preferred direction of rotation can be related to forward travel of the vehicle. The preferred direction of rotation can correspond to a relative speed of the first sun gear relative to the first planet carrier. If, for example, the first sun gear is stationary relative to the transmission housing and the first planet carrier rotates relative to the transmission housing opposite to the preferred direction of rotation, then the sun gear rotates relative to the first planet carrier in the preferred direction of rotation.The first planetary gears can be connected to the first planetary carrier so that they can rotate about a planetary axis of rotation. If the first sun gear rotates in the preferred direction of rotation, the first planetary gears can rotate opposite to the preferred direction of rotation.

[0011] The guide element partially surrounds an outer circumference of the first sun gear. The guide element is connected to the first planet carrier. The guide element can be connected to the first planet carrier in a rotationally fixed manner. The guide element is arranged in the circumferential direction between two circumferentially adjacent first planet gears. The guide element has a guide surface having a front end portion and a rear end portion. The guide element extends from the rear end portion in the direction of rotation of the sun gear on the outer circumference of the sun gear to the front end portion. The guide surface is designed to drain oil from the front end portion of the guide element in the direction of rotation, whereas the guide surface is designed to restrict the drainage of oil from the rear end portion of the guide element counter to the direction of rotation. The guide element can have a circumferential front side.The circumferential front side can be the side of the guide element on which the front end portion of the guide element is arranged. A circumferential rear side can be arranged relative to the guide element in the circumferential direction opposite to the preferred direction of rotation. Oil can be conveyed to a circumferential front side of the guide element under the action of a centrifugal force on the guide surface. The oil can be conveyed to the circumferential front side when the first sun gear rotates in the preferred direction of rotation.

[0012] If 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. For example, a mechanical operative connection can be provided by a positive or frictional connection. The mechanical operative connection can correspond to 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] A permanently non-rotatable connection between two elements, on the other hand, is understood to be a connection in which the two elements are rigidly coupled to each other under all intended conditions of the transmission. The elements can be present as individual components connected in a non-rotatable manner or as a single piece. A switching element, such as a clutch or brake, can selectively establish or break a non-rotatable connection between two elements.

[0014] If two elements are connected to each other, they are linked by one or more connection points. However, relative movements, such as pivoting, may be possible between these elements at and around the connection points.

[0015] The first planetary gear set can have the first sun gear, the first planet carrier, a bolt, which can be formed by a planet bolt or first planet bolt, the first planet gears, and a first ring gear. The first planetary gear set can have four first planet bolts and four first planet gears. The first planet gear can mesh with the first ring gear. The first planet gear can be rotatably mounted on the first planet bolt. The first planet bolt can be connected to the first planet carrier. The circumferential front side of the guide element can be a side of the guide element in the circumferential direction in which the first sun gear rotates in the preferred direction of rotation. On the circumferential front side of the guide element, teeth of a toothing of one of the first planet gears can move inward in a radial direction towards the sun gear.One of the first planetary gears can move oil radially inward toward the first sun gear on the circumferential front side of the guide element. Due to the direction of rotation of one of the first planetary gears, one of the first planetary gears on the circumferential front side of the guide element can function as a gear pump. Thus, with the teeth of one of the first planetary gears, the oil can be actively carried radially inward directly into the meshing between the sun gear and the planetary gear. This allows the first sun gear to be cooled very effectively.

[0016] Several guide elements can be distributed in the circumferential direction. A guide element can be provided between each circumferentially adjacent pair of first planet gears. The guide element can be arranged radially within the planetary axis of rotation.

[0017] The guide surface can be designed to be partially circular in the circumferential direction. The guide surface can be arranged concentrically to the first sun gear. The guide surface can be inclined in the circumferential direction such that a distance of the guide surface on a circumferential front side of the guide element is smaller than a distance of the guide surface on the circumferential back side of the guide element. The guide surface can be designed to be flat. The guide surface can be designed such that oil which is repelled, for example, by the sun, is captured and guided in the circumferential direction to the planetary gearing on the circumferential front side, the teeth of which move towards the sun. The guide element can be designed such that it directly or indirectly at least partially captures an oil flow from an oil supply, for example an oil channel for the first sun gear, and guides it into the gearing of one of the planetary gears which is arranged on the circumferential front side of the guide element.

[0018] The guide element can be designed in one piece with the first planet carrier. The guide element can be made of plastic. The guide element can be manufactured, for example, using an injection molding process. The guide element can be made of metal. The guide element can be made, for example, from formed sheet metal. The guide element can be attached to the first planet carrier by means of clips. Ribs can be attached to the guide element. The ribs can be aligned in the axial direction. The ribs can extend along the entire guide element. The ribs can extend along a section of the guide element. The ribs can be attached to an outer circumference of the guide element in the radial direction. The ribs can be designed such that they ensure dimensional stability of the guide element when a centrifugal force acts on the guide element.

[0019] The first sun gear and the first planet gears may be helical gears. The oil may be drained in an axial direction through the meshing of the first sun gear with one of the first planet gears.

[0020] In one embodiment, the guide element may comprise a circumferential limiting element arranged at the rear end portion of the guide element.

[0021] The circumferential limiting element can extend in the radial direction toward the first sun gear. The circumferential limiting element can be configured as a wall section. The circumferential limiting element can have a planar limiting surface. The circumferential limiting element can be oriented in the axial direction. The limiting surface can be oriented in the axial direction. The circumferential limiting element, the limiting surface, or a combination thereof can be oriented at an acute angle to the axial direction. The circumferential limiting element can be arranged in the axial direction in a central region of a tooth geometry of the first sun gear.

[0022] The circumferential limiting element can limit the flow of oil from the guide surface in the circumferential direction to the circumferential rear side across the guide element. The circumferential limiting element can be configured to limit the discharge of oil from the rear end portion of the guide element counter to the direction of rotation. The circumferential limiting element can be configured such that, under the action of a centrifugal force, an oblique oil level is established on the guide surface with respect to the circumferential direction, which oil level has a lower height in the radial direction at the circumferential front side than at the circumferential rear side.

[0023] In one embodiment, the guide element may comprise an axial limiting element arranged on an axial rear side of the guide element in the axial direction.

[0024] An axial rear side can be a side of the guide element in the axial direction that is opposite an oil supply, for example, an oil channel for the first sun gear, relative to the guide element. The axial limiting element can be configured such that it can be used to limit an oil flow in the axial direction toward the axial rear side across the guide element. The axial limiting element can be configured to limit the discharge of oil from the axial rear side of the guide element.

[0025] The axial limiting element can extend in the radial direction toward the first sun gear. The axial limiting element can be configured as a wall section. The axial limiting element can have a flat limiting surface. The axial limiting element can be oriented in the circumferential direction. The axial limiting element can be oriented at an acute angle to the circumferential direction. The axial limiting element can be arranged in the axial direction in a central region of the tooth geometry of the first sun gear.

[0026] In one embodiment, the oil guide device may further comprise a stationary component having a main oil channel and an oil channel for the first sun gear. The main oil channel may be in fluid communication with the oil channel for the first sun gear. The oil channel for the first sun gear may have an opening that forms a nozzle axis. The nozzle axis may be configured such that oil flows from the oil channel for the first sun gear to the first sun gear. The nozzle axis may be configured such that oil flows from the oil channel for the first sun gear to the first sun gear at least temporarily.

[0027] If two elements are fluidly connected, a fluid, such as oil, can be directed from one element to the other. The fluid connection can be designed to be leak-free, so that the oil is essentially completely directed from one element to the other. However, the fluid connection can also be established via an oil jet. The fluid connection can also be subject to leakage.

[0028] The nozzle axis can be aligned in the direction of a toothing geometry of the first sun gear. The nozzle axis can be aligned so as to be inclined inward in the radial direction. The nozzle axis can be aligned so as to be axially aligned. A gap can be provided between the guide surface and the first sun gear. The gap can extend over a small height in the radial direction. The height of the gap can be less than a tooth height of the first sun gear or can substantially correspond to a tooth height of the first sun gear. The height of the gap can be less than a height of a region in the radial direction between a center axis of the planetary pin and an outer circumference of the first sun gear. The nozzle axis can be aligned with the gap between the guide surface and the first sun gear. The nozzle axis can be aligned so as to be inclined outward in the radial direction. The nozzle axis can be aligned with the guide surface of the guide element.

[0029] The oil channel for the first sun gear can be designed such that oil emerges in a jet from the opening of the oil channel for the first sun gear. The oil channel for the first sun gear can be designed such that an oil jet flows to the first sun gear. The oil channel for the first sun gear can be designed such that an oil jet flows onto a toothing geometry of the first sun gear. The oil channel for the first sun gear can be designed such that an oil jet is reflected at the first sun gear to the guide surface of the guide element. The oil channel for the first sun gear can form a nozzle. The oil channel for the first sun gear can have a nozzle. A nozzle can, for example, be screwable into the oil channel for the first sun gear. The nozzle can have the nozzle axis.

[0030] The axial limiting element can be arranged opposite the oil channel for the first sun gear relative to the guide element. The oil channel for the first sun gear can be formed in the first sun gear. The oil channel for the first sun gear can extend in the radial direction. The first sun gear can be hollow.

[0031] In one embodiment, an opening cross-section of the oil channel for the first sun gear can be smaller than an opening cross-section of the main oil channel. An opening cross-section of the nozzle of the oil channel for the first sun gear can be smaller than an opening cross-section of the main oil channel. Oil can be discharged from the oil channel for the first sun gear via the opening cross-section.

[0032] The oil channel for the first sun gear can have a cylindrical opening. The oil channel for the first sun gear can be formed by a cylindrical bore. The oil channel for the first sun gear can be attached to the stationary component as a separate component, for example, screwed or pressed in. A diameter of the cylindrical bore can be smaller than a diameter of the main oil channel. Several oil channels for the first sun gear can be arranged distributed in the circumferential direction. Several oil channels for the first sun gear can be evenly distributed in the circumferential direction.

[0033] The oil passage for the first sun gear can be configured such that oil is sprayed out of the oil passage for the first sun gear. The oil passage for the first sun gear can be configured such that oil leaves the oil passage for the first sun gear in the form of a mist. The oil passage for the first sun gear can be configured such that oil leaves the oil passage for the first sun gear in the form of an oil jet. The oil passage for the first sun gear can be configured such that the oil jet hardly widens. The diameter of the oil jet can be smaller than the height of the gap between the guide element and the first sun gear.

[0034] In one embodiment, the oil guide device can be configured to oil a transmission having an input element and a first output shaft. The transmission can further have a second output shaft. The first planetary gear set can form a first gear set of the transmission. The stationary component can further have an oil channel for the first gear set, which is in fluid communication with the main oil channel. The oil channel for the first gear set can have an opening forming a nozzle axis oriented in the axial direction. The nozzle axis can be oriented outward in the radial direction.

[0035] In one embodiment, the first planetary gear set may include at least the first planetary pin having a cavity and a recess extending in the radial direction from the cavity through the first planetary pin to an outer side of the first planetary pin. The cavity of the first planetary pin may be in fluid communication with the oil passage for the first gear set. The cavity of the first planetary pin may be configured as a cylindrical bore in the axial direction. The recess may be configured as a cylindrical bore. A cross-sectional area of ​​the recess may be smaller than a cross-sectional area of ​​the cavity. A plurality of recesses may be arranged distributed in the circumferential direction. A plurality of recesses may be arranged evenly distributed in the circumferential direction. The recess may be arranged in a central region of the bearing relative to a bearing for one of the first planetary gears.

[0036] In one embodiment, the oil guide device may include a collecting component with a collecting surface, which is arranged to collect oil from one end of the oil channel for the first gear set in the radial direction and guide it in the axial direction to the first planetary pin. The nozzle axis of the oil channel for the first gear set may be aligned with the cavity of the first planetary pin. The collecting component may be connected to the first planetary carrier. The collecting component may be connected to the first planetary carrier in a rotationally fixed manner. The guide element and the collecting component may be configured as a single piece.

[0037] In one embodiment, the oil guide device can have a deflection element configured to collect oil from one end of the oil channel for the first sun gear in the direction of the nozzle axis and guide it in the radial direction to the collecting component. The deflection element can have an arcuate deflection surface on the inside in the radial direction. The arcuate deflection surface can open into a flat surface extending outward in the radial direction. The nozzle axis can be aligned with the arcuate section. The deflection element can extend in sections in the circumferential direction. The deflection element can extend in the circumferential direction in a region of one of the first planetary pins. The deflection element can be arranged in the circumferential direction between two guide elements. Multiple deflection elements can be arranged in the circumferential direction. Multiple deflection elements can be arranged evenly distributed in the circumferential direction.This means that the oil channel for the first sun gear and the oil channel for the first gear set can be formed by a common oil channel.

[0038] The deflecting element can be connected to the first planet carrier. Depending on the angular position of the first planet carrier relative to the stationary component, the common oil channel can conduct oil to the deflecting element or to the first sun gear. The oil can be supplied to the first sun gear directly or indirectly via the guide element and via one of the first planet gears if the angular position of the first planet carrier is such that an oil jet from the common oil channel strikes between two of the first planet pins. The oil can be conducted to the collecting component via the deflecting element if the angular position of the first planet carrier is such that the oil jet from the common oil channel is directed at one of the first planet pins or one of the first planet gears.

[0039] In one embodiment, the transmission may further include a second gear set. The stationary component may form an oil passage for the second gear set, which is in fluid communication with the main oil passage.

[0040] In one embodiment, the main oil channel may include an annular channel. The annular channel may extend annularly in the circumferential direction. The annular channel may be in fluid communication with the oil channel for the second gear set.

[0041] In one embodiment, the oil guide device can comprise a support element that is rotationally fixedly connected to the stationary component. The support element can extend in the circumferential direction. The support element can cover the annular channel. The support element can seal the annular channel. The support element can form the annular channel at least in sections. The support element can be designed to receive a second bolt.

[0042] In one embodiment, the second gear set may include a second pin having a cavity and a recess extending in the radial direction from the cavity through the second pin to an outer side of the second pin. The cavity may be in fluid communication with the annular channel. The second pin may be connected to the carrier element. An oil throttle, for example an oil orifice, may be provided in the cavity of the second pin. The cavity of the second pin may be configured as a cylindrical bore in the axial direction. The recess may be configured as a cylindrical bore. A cross-sectional area of ​​the recess may be smaller than a cross-sectional area of ​​the cavity. A plurality of recesses may be arranged distributed in the circumferential direction. A plurality of recesses may be arranged evenly distributed in the circumferential direction.The recess can be arranged in a central region of the bearing on the second pin. Several recesses, for example two, can be arranged next to each other in the axial direction.

[0043] In one aspect, a transmission comprises an input element, a first output shaft, a second output shaft, and an oil guide device according to any one of the preceding embodiments. The transmission may have the function of a differential.

[0044] In one embodiment, the planetary gear set of the oil guide device can form the first planetary gear set with the first sun gear, the first planet carrier, the first planet pin, and the first planetary gear. The second gear set of the oil guide device can be formed by the second planetary gear set. The first planetary gear set and the second planetary gear set can be mechanically operatively connected to one another such that a torque can be transmitted from the first planetary gear set to the second planetary gear set. The first output shaft can be configured to output a torque from the first planetary gear set. The second output shaft can be configured to output a torque from the second planetary gear set. The first planetary gear set can have at least a first element, for example the first sun gear, a second element, for example the first planet carrier, and a third element, for example the first ring gear.The second planetary gear set can have at least a first element, for example a second sun gear, a second element, for example a second planet carrier, and a third element, for example a second ring gear. The input element can be rotationally fixedly connected to the first element of the first planetary gear set. The input element can form this first element on an outer circumference. The second element of the first planetary gear set can be rotationally fixedly connected to the first output shaft. The third element of the first planetary gear set can be rotationally fixedly connected to the first element of the second planetary gear set. The second element of the second planetary gear set can be rotationally fixedly connected to the stationary component. The third element of the second planetary gear set can be rotationally fixedly connected to the second output shaft.

[0045] The second planetary gear set may include the second sun gear, the second planet carrier, a second planet pinion, a second planet gear, and the second ring gear. One of the second planet pinions may form the second pinion. The second sun gear may mesh with the second planet gear. The second planet gear may mesh with the second ring gear. 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. The carrier element may be formed by the second planet carrier.

[0046] The first and second planetary gear sets can be designed as minus planetary gears or as plus planetary gears.

[0047] If the first or second planetary gear set is designed as a negative planetary gear set, the respective second element can be formed by the planet carrier. The respective third element can be formed by the ring gear. The input element can form the first sun gear on an outer circumference. The first ring gear can be connected in a rotationally fixed manner to the second sun gear. A sun ring gear can form the first ring gear on an inner circumference and the second sun gear on an outer circumference. The second planet carrier can be connected in a rotationally fixed manner to the stationary component.

[0048] If the first or second planetary gear set is designed as a positive planetary gear set, the respective second element can be formed by the ring gear. The respective third element can be formed by the planet carrier.

[0049] 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 be arranged offset from one another in the axial direction.

[0050] In one embodiment, the input element can be rotationally fixedly connected to the first sun gear. The first planetary carrier can be rotationally fixedly connected to the first output shaft for outputting torque from the first planetary gear set. The second ring gear of the second planetary gear set can be rotationally fixedly connected to the second output shaft for outputting torque from the second planetary gear set. The first planetary gear set and the second planetary gear set can then be configured as a negative planetary gear.

[0051] In a further aspect, a vehicle comprises a drive unit, at least two drive wheels, and a transmission according to one of the preceding aspects and embodiments. The drive unit can be formed by an electric machine or an internal combustion engine. The drive unit is configured to drive the input element. One of the drive wheels is configured to drive the vehicle via the first output shaft. The other of the drive wheels is configured to drive the vehicle via the second output shaft.

[0052] Short description of the characters

[0053] Figure 1 shows a sectional view of an embodiment of an oil guide device. Figure 2 shows another sectional view of the embodiment of the oil guide device.

[0054] Figure 3 shows a sectional view of another embodiment of the oil guide device.

[0055] Figure 4 shows a further sectional view of an embodiment of the oil guide device.

[0056] Figure 5 shows a perspective view of another embodiment of the oil guide device.

[0057] Detailed description of embodiments

[0058] Figure 1 shows a sectional view of an embodiment of an oil guide device.

[0059] Figure 1 is shown in a half-section. The oil guide device comprises a stationary component 9, in this case a transmission housing, a first gear set, in this case a first planetary gear set 10, and a guide element 30. The first planetary gear set 10 comprises a first sun gear 11, four first planetary gears 14 shown in Figure 4, and a first planet carrier 12. The oil guide device is used for a transmission with an input element 4, a first output shaft 5, a second output shaft 6, and a second gear set, in this case a second planetary gear set 20.

[0060] The first sun gear 11 is in engagement with the first planet gears 14. The guide element 30 surrounds an outer circumference of the first sun gear 11 in sections in a central region of the first sun gear 11 in an axial direction of the first sun gear 11. The guide element 30 is arranged in the circumferential direction between two first planet gears 14. The guide element 30 is connected to the first planet carrier 12, in this case connected in a rotationally fixed manner, and rotates together with the first planet carrier 12 about an axis of rotation. The first sun gear 11 rotates about the axis of rotation in a preferred direction of rotation. The first planet gears 14 rotate in opposite directions on the first planet carrier 12 about a planetary axis of rotation. The first planet carrier 12 rotates in the preferred direction of rotation about the axis of rotation.In this respect, an outer circumference of one of the first planetary gears 14 on the circumferential front side of the guide element 30 moves inward in the radial direction toward the first sun gear 11.

[0061] The guide element 30 has a guide surface with a front end portion 36 and a rear end portion 35, which are shown in Figure 4. The guide element 30 extends from the rear end portion 35 in the direction of rotation of the sun gear 11 on the outer circumference of the sun gear 11 to the front end portion 36. The front end portion 36 is arranged on the circumferential front side of the guide element 30. The guide surface is designed to drain oil from the front end portion 36 of the guide element 30 in the direction of rotation, whereas the guide surface is designed to restrict the drainage of oil from the rear end portion 35 of the guide element 30 against the direction of rotation. The guide surface is designed such that oil is conveyed past the guide surface to the circumferential front side. When the first sun gear 11, the first planet carrier 12 and the first planet gears 14 rotate, the guide element 30 also rotates about the axis of rotation.A centrifugal force acts on the oil. The oil is pressed radially outward toward the guide surface and distributed toward the circumferential front side of the guide element 30. At the circumferential rear side of the guide element 30, oil movement beyond the guide element 30 is restricted.

[0062] Further details of the oil guide device are described below.

[0063] The first planetary gear set 10 comprises the first sun gear 11, the first planet carrier 12, four first planetary pinions 13 shown in Figure 4, four first planetary gears 14 shown in Figure 4, and a first ring gear 15. The first planetary gears 14 mesh with the first ring gear 15 and are each rotatably mounted on one of the first planetary pinions 13. The first planetary pinions 13 are connected to the first planet carrier 12.

[0064] The second planetary gear set 20 includes a second sun gear 21, a second planet carrier 22, a number of second planet pinions 23, a number of second planet gears 24, and a second ring gear 25. The second sun gear 21 meshes with the second planet gears 24. The second planet gears 24 mesh with the second ring gear 25 and are each rotatably mounted on one of the second planet pinions 23. The second planet pinions 23 are connected to the second planet carrier 22.

[0065] The first planetary gear set 10 and the second planetary gear set 20 are arranged in the same plane in an axial direction. The second planetary gear set 20 is arranged radially outward from the first planetary gear set 10.

[0066] The input element 4 forms the first sun gear 11 of the first planetary gear set 10 on an outer circumference of an end portion of the input element 4 on a right-hand side in Figure 1, on which the second output shaft 6 is arranged in the axial direction relative to the first planetary gear set 10. The first planet carrier 12 is rotationally fixedly connected to the first output shaft 5 via a spline for outputting a torque from the first planetary gear set 10. The second planet carrier 22 is rotationally fixedly connected to the stationary component 9. The second ring gear 25 is rotationally fixedly connected to the second output shaft 6 for outputting a torque from the second planetary gear set 20.

[0067] The first ring gear 15 and the second sun gear 21 are formed by a sun ring gear 1. The sun ring gear 1 has the first ring gear 15 on an inner circumference. The sun ring gear 1 has the second sun gear 21 on an outer circumference. As a result, the first planetary gear set 10 is mechanically operatively connected to the second planetary gear set 20.

[0068] The first output shaft 5 and the second output shaft 6 are arranged coaxially with the input element 4. The first output shaft 5 extends in the axial direction through the input element 4. The first output shaft 5 extends partially in the axial direction within the second output shaft 6.

[0069] The stationary component 9 has a main oil passage 90. The stationary component 9 further has an oil passage 91 for the first sun gear 11, an annular passage 95, an oil passage 96 for the first gear set, and an oil passage 97 for the second gear set, each of which is in parallel fluid communication with the main oil passage 90.

[0070] The main oil channel 90 is supplied with pressurized oil by an oil pump (not shown).

[0071] The main oil channel 90 extends in Figure 1 on the right side of the first planetary gear set 10 and the second planetary gear set 20 in a vertical direction. At a vertically upper end region of the main oil channel 90, the main oil channel 90 extends in a horizontal direction to a left side of the first planetary gear set 10 and the second planetary gear set 20. The left side is a side on which the first output shaft 5 is arranged with respect to the first planetary gear set 10. On the left side, the main oil channel 90 extends vertically downward to the oil channel 91 for the first sun gear 11, to the annular channel 95, which is in fluid communication with the axially extending oil channel 97 for the second gear set, and to the oil channel 96 for the first gear set. The main oil channel 90 is designed as a cylindrical bore.

[0072] The annular channel 95 extends in the circumferential direction. The annular channel 95 is covered in the axial direction on the right side in Figure 1 by the second planet carrier 22.

[0073] The second planetary pins 23 have a hollow space extending in the axial direction and a number of recesses extending in the radial direction from the hollow space through the second planetary pin 23 to an outer side of the second planetary pin 23. The recesses oil a bearing for one of the second planetary gears 24. The hollow space of the second planetary pin 23 is in fluid communication with the annular channel 95. An oil throttle, in this case an oil orifice, is provided in the hollow space of the second planetary pin 23.

[0074] The oil channel 96 for the first gear set extends axially and radially outwardly from the main oil channel 90 toward the first planetary gear set 10. The oil channel 96 for the first gear set is designed as a cylindrical bore having a smaller diameter than the main oil channel 90. The oil channel 96 for the first gear set forms an oil throttle, in this case an oil orifice. A collecting component 80 is connected in a rotationally fixed manner to the first planet carrier 12. The collecting component 80 has a collecting surface that is plate-shaped and circumferentially configured such that it collects oil from one end of the oil channel 96 for the first gear set in the radial direction and guides it in the axial direction to one of the first planetary pins 13.

[0075] The oil channel 91 for the first sun gear 11 forms an oil throttle, in this case an oil orifice. The oil channel 91 for the first sun gear 11, the oil channel 96 for the first gear set, and the oil throttle in the oil channel 97 for the second gear set determine the distribution of oil volume flows in the transmission.

[0076] The oil channel 91 for the first sun gear 11 has an opening that forms a nozzle axis. In this case, the oil channel 91 for the first sun gear 11 is formed by a cylindrical bore that has a smaller diameter than the main oil channel 90. In this respect, the oil channel 91 for the first sun gear 11 forms a nozzle. The nozzle axis is configured such that oil flows from the oil channel 91 for the first sun gear 11 at least temporarily to the first sun gear 11. The nozzle axis is inclined inward in the radial direction with respect to the axial direction. In this case, the oil channel 91 for the first sun gear 11 is configured such that the oil leaves the oil channel 91 for the first sun gear 11 as an oil jet. The oil jet is directed onto a toothing geometry of the first sun gear 11 into a gap in the radial direction between the guide element 30 and the first sun gear 11.The oil jet is reflected at the first sun gear 11 and flows outward to the guide surface of the guide element 30 in the radial direction.

[0077] The guide element 30 has an axial limiting element 31 and a circumferential limiting element 32. The axial limiting element 31 is arranged on an axial rear side of the guide element 30. The axial rear side is a side of the guide element 30 which, with respect to the guide element 30, is arranged in the axial direction opposite the oil channel 91 for the first sun gear 11, i.e., the right-hand side in Figure 1. The axial limiting element 31 is designed as a wall section with a flat surface. The axial limiting element 31 extends inward in the radial direction and is oriented in the circumferential direction. The axial limiting element 31 extends in the circumferential direction along the entire guide element 30. As a result, oil flow in the axial direction on the axial rear side is limited beyond the guide element 30.

[0078] The circumferential limiting element 32 is arranged on the circumferential rear side of the guide element 30. The circumferential limiting element 32 extends radially inward as a wall section with a flat surface and is aligned in the axial direction. The circumferential limiting element 32 extends in the axial direction along the entire guide element 30.

[0079] In a further embodiment, the oil guide device is used in a vehicle. The first output shaft 5 is operatively connected to a first drive wheel of the vehicle. The second output shaft 6 is operatively connected to a second drive wheel of the vehicle. The connection between one of the first output shafts 5 and the second output shaft 6 and the respective one of the first drive wheel and the second drive wheel is made directly via a rotationally fixed connection or via an intermediate gear. In a further embodiment, the intermediate gear is designed as a reduction stage. In a further embodiment, joints are arranged between each of the first output shaft 5 and the second output shaft 6 and the respective one of the first drive wheel and the second drive wheel in order to achieve at least one of a steering angle and a spring travel.

[0080] Figure 2 shows a further sectional view of the embodiment of the oil guide device described with reference to Figure 1. The section runs in the axial direction and the radial direction through one of the first planetary pins 13 and one of the first planetary gears 14.

[0081] The first planetary pins 13 have a hollow space extending in the axial direction and a number of recesses. Each of the recesses extends in the radial direction from the hollow space through the first planetary pin 13 to an outer side of the first planetary pin 13. A bearing for one of the first planetary gears 14 is oiled via the recesses of each of the first planetary pins 13. A collecting component 80 with a collecting surface is arranged to collect oil from an end portion of the oil channel 96 for the first gear set in the radial direction and to conduct it in the axial direction to the first planetary pin 13.

[0082] The oil channel 96 for the first gear set is aligned with the cavity of the first planetary pin 13 such that an oil jet from the oil channel 96 for the first gear set flows into the cavity of the first planetary pin 13 with a corresponding rotational angle position of the first planet carrier 12 to the stationary component 9.

[0083] Figure 3 shows a sectional view of another embodiment of the oil guide device. The present embodiment differs from the previous embodiment in the design of the oil channel 96 for the first gear set and in that the oil guide device additionally has a deflection element 81.

[0084] The deflection element 81 is designed to collect oil from one end of the oil channel 91 for the first sun gear 11 in the direction of the nozzle axis and direct it in the radial direction to the collecting component 80. The deflection element 81 has an arcuate section that opens into a flat section that extends in the radial direction. The nozzle axis is aligned with the arcuate section. The deflection element 81 extends in the circumferential direction in the region of one of the first planetary pins 13. Several deflection elements 81 are arranged in the circumferential direction. A deflection element 81 is arranged on each of the first planetary pins 13. In this respect, the oil channel 91 for the first sun gear 11 and the oil channel 96 for the first gear set can be formed by a common oil channel.Depending on the rotational angle position of the first planet carrier 12 relative to the stationary component 9, the oil flows from the oil channel 91, 96 for the first sun gear 11 and the first gear set to the deflection element 81 or the collecting component 80 and the first planetary pin 13 or to the first sun gear 11 or the guide element 30.

[0085] Figure 4 shows a further sectional view of an embodiment of the oil guide device. The present embodiment has all the features of at least one of the preceding embodiments. The sectional view in Figure 4 runs perpendicular to the axial direction. A preferred direction of rotation of the first sun gear 11 is clockwise in Figure 4 and is represented by an arrow. Accordingly, the circumferential restriction sections 32 on each of the four guide elements 30 are arranged counterclockwise on the circumferential rear side. A direction of rotation of the first planet gears 14 about their respective planetary axes of rotation is counterclockwise and is represented by an arrow in Figure 4.

[0086] Figure 5 shows a perspective view of another embodiment of the oil guide device. The present embodiment has all the features of at least one of the preceding embodiments. The input element 4, the first sun gear 11, and the first output shaft 5 are not shown in Figure 5. Several guide elements 30 are connected to one another via a disk-shaped element that extends in the radial direction. The disk-shaped element has recesses in the region of the first planetary pins 13 to enable the oil channel 96 for the first gear set to guide an oil jet directly or indirectly into the cavity of one of the first planetary pins 13.

[0087] The first sun gear 11 and the first planet gears 14 are helically toothed. The oil is thus drained in the axial direction through the meshing of the first sun gear 11 with one of the first planet gears 14. In an alternative embodiment, the helical direction of the gears is opposite to that shown in Figure 5.

[0088] Reference symbol

[0089] Sun gear

[0090] Input element

[0091] First output wave

[0092] Second output shaft

[0093] Stationary component

[0094] Planetary gear set, first planetary gear set Sun gear, first sun gear

[0095] Planet carrier, first planet carrier Planet pin, first planet pin Planet gear, first planet gear

[0096] First ring gear

[0097] Second planetary gear set

[0098] Second sun gear

[0099] Second planet carrier

[0100] Second planetary bolt

[0101] Second planetary gear

[0102] Second ring gear

[0103] Guide element

[0104] Axial limiting element Circumferential limiting element Rear end section

[0105] Front end section

[0106] Catch component deflection element

[0107] Main oil channel

[0108] Oil channel for the first sun gear, Oil channel for the sun gear Ring channel Oil channel for the first gear set Oil channel for the second gear set

Claims

Patent claims 1. An oil guide device comprising a planetary gear set (10) comprising a sun gear (11), at least two planet gears (14) and a planet carrier (12), and a guide element (30), wherein the sun gear (11) is in engagement with the planet gears (14), the guide element (30) partially surrounds an outer circumference of the sun gear (11), is connected to the planet carrier (12) and is arranged in a circumferential direction between two planet gears (14) adjacent in the circumferential direction, the guide element (30) has a guide surface having a front end portion (36) and a rear end portion (35), wherein the guide element (30) extends from the rear end portion (35) in the direction of rotation of the sun gear (11) on the outer circumference of the sun gear (11) to the front end portion (36), and the guide surface is designed to discharge oil from the front end portion (36) of the guide element (30) in the direction of rotation,whereas the guide surface is designed to restrict the discharge of oil from the rear end portion (35) of the guide element (30) against the direction of rotation., 2. Oil guide device according to one of the preceding claims, characterized in that the guide element (30) has a circumferential limiting element (32) which is arranged on the rear end section (35) of the guide element (30).

3. Oil guide device according to one of the preceding claims, characterized in that the guide element (30) has an axial limiting element (31) which is arranged on an axial rear side of the guide element (30) in the axial direction.

4. Oil guide device according to one of the preceding claims, characterized in that the oil guide device further comprises a stationary component (9) with a main oil channel (90) and an oil channel (91) for the sun gear (11), the main oil channel (90) is in fluid communication with the oil channel (91) for the sun gear (11), the oil channel (91) for the sun gear (11) has an opening which forms a nozzle axis, and the nozzle axis is arranged such that oil flows from the oil channel (91) for the sun gear (11) to the sun gear (11).

5. Oil guide device according to claim 4, characterized in that an opening cross section of the oil channel (91) for the sun gear (11) is smaller than an opening cross section of the main oil channel (90).

6. Oil guide device according to one of the preceding claims, characterized in that the oil guide device is designed to oil a transmission which has an input element (4) and a first output shaft (5), the planetary gear set (10) forms a first gear set of the transmission, the stationary component (9) further has an oil channel (96) for the first gear set, which is in fluid connection with the main oil channel (90).

7. Oil guide device according to claim 6, characterized in that the planetary gear set (10) has at least one planetary pin (13) which has a cavity and a recess which extends in the radial direction from the cavity through the planetary pin (13) to an outer side of the planetary pin (13), and the cavity of the planetary pin (13) is in fluid communication with the oil channel (96) for the first gear set.

8. Oil guide device according to claim 7, characterized in that the oil guide device has a collecting component (80) with a collecting surface, which is arranged to collect oil from one end of the oil channel (96) for the first gear set in the radial direction and guide it in the axial direction to the planetary pin (13).

9. Oil guide device according to claim 8, characterized in that the oil guide device has a deflection element (81) which is designed to collect oil from one end of the oil channel (91) for the sun gear (11) in the direction of the nozzle axis and guide it in the radial direction to the collecting component (80).

10. Oil guide device according to one of claims 6 - 9, characterized in that the transmission further comprises a second gear set, the stationary component (9) forms an oil channel (97) for the second gear set, which is in fluid communication with the main oil channel (90).

11. Oil guide device according to claim 10, characterized in that the main oil channel (90) has an annular channel (95) which extends annularly in the circumferential direction and which is in fluid communication with the oil channel (97) for the second gear set.

12. Oil guide device according to claim 11, characterized in that the oil guide device has a carrier element which is connected to the stationary component (9) in a rotationally fixed manner, the carrier element extends in the circumferential direction, and the carrier element covers the annular channel (95).

13. Oil guide device according to claim 11 or 12, characterized in that the second gear set has a second bolt having a cavity and a recess extending in the radial direction from the cavity through the second bolt to an outer side of the second bolt, and the cavity is in fluid communication with the annular channel (95).

14. A transmission comprising an input element (4), a first output shaft (5), a second output shaft (6) and an oil guide device according to one of the preceding claims.

15. Transmission according to claim 14, characterized in that the planetary gear set (10) of the oil guide device forms a first planetary gear set (10) with a first sun gear (11), a first planet carrier (12), a first planet pin (13) and a first planetary gear (14), the second gear set of the oil guide device is formed by a second planetary gear set (20), the first planetary gear set (10) and the second planetary gear set (20) are mechanically operatively connected to one another such that a torque can be transmitted from the first planetary gear set (10) to the second planetary gear set (20), the first output shaft (5) is designed to output a torque from the first planetary gear set (10), and the second output shaft (6) is designed to output a torque from the second planetary gear set (20).

16. Transmission according to claim 15, characterized in that the input element (4) is connected in a rotationally fixed manner to the first sun gear (11), the first planet carrier (12) is connected in a rotationally fixed manner to the first output shaft (5) for outputting a torque from the first planetary gear set (10), and a second ring gear (25) of the second planetary gear set (20) is connected in a rotationally fixed manner to the second output shaft (6) for outputting a torque from the second planetary gear set (20).

17. A vehicle having a drive unit, at least two drive wheels and a transmission according to any one of claims 14-16, wherein the drive unit is arranged to drive the input element (4), one of the drive wheels is arranged to drive the vehicle via the first output shaft (5), and the other of the drive wheels is arranged to drive the vehicle via the second output shaft (6).

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