Power transmission device for motor vehicle and motor vehicle

Abstract

The invention relates to a power transmission device (10) for a motor vehicle, comprising: a housing (12); a transmission (14) having a transmission element (16) arranged in a transmission housing part (18) of the housing (12); at least one wheelset disposed in the wheelset chamber of the housing (12); at least one clutch device arranged in a clutch chamber of the housing (12); a differential unit (26) having a crown gear (28); and an oil pan (30) arranged in the bottom region (34) of the transmission housing part (18) for collecting oil at least for lubricating and cooling the transmission element (16). A differential capsule device (24) is also provided, which is arranged on the axial end face (S1) of the differential unit (26) and is designed as a radial annular body arranged in the radial region of the crown gear (28), which extends in the circumferential direction (38) of the differential unit (26) over at most 75% of the circumference of the differential unit (26).

Description

Technical Field

[0001] The invention relates to a drive train for a motor vehicle, in particular a car, according to the preamble of patent claim 1. The invention also relates to a motor vehicle, in particular a car, having such a drive train. Background Art

[0002] DE 10 2010 004 222 A1 discloses a transmission for a motor vehicle having a transmission element rotatable for transmitting torque, which is arranged in a first part of the transmission. A reservoir for a liquid for lubricating and cooling the transmission element is also provided, wherein the reservoir is arranged in a second part of the transmission, separate from the first part. Summary of the Invention

[0003] The object of the present invention is to provide a drive unit for a motor vehicle and a motor vehicle having such a drive unit, which allow a particularly advantageous oil conduction to be achieved.

[0004] This object is achieved by a drive train for a motor vehicle having the features of patent claim 1 and a motor vehicle having the features of patent claim 7. Advantageous embodiments with suitable developments of the invention are specified in the remaining claims.

[0005] A first aspect of the present invention relates to a power transmission device for a motor vehicle, also referred to simply as a vehicle, and preferably configured as an automobile, particularly a passenger car. This means that the motor vehicle, in its manufactured state, comprises a power transmission device and can be driven by means of or via the power transmission device. The power transmission device comprises a housing, which can, for example, be constructed from multiple parts and thus have multiple housing components. In particular, the housing components are constructed independently of one another and are connected to one another. The power transmission device comprises a transmission, also referred to simply as a gear, and a transmission element. The transmission element is arranged in a gear housing component of the housing, wherein the gear housing component is also referred to as a gear housing. For example, the gear housing component is a first housing component of the housing. In particular, the transmission element is arranged in a gear chamber of the housing, particularly of the gear housing component, wherein, for example, the gear chamber is directly defined by the housing, particularly by the gear housing component. Most preferably, the gear chamber is defined by a surface on the inner circumference of the housing, particularly by an inner surface of the gear housing component. The first transmission element can be, for example, a first gear having, for example, a first toothing. The second transmission element can be, for example, a second gear having a second gear. In particular, it is conceivable that the gears mesh with each other via toothing. The power transmission device also includes at least one gear set, which is preferably provided in addition to the transmission element. The gear set is disposed in a gear set chamber of the housing. The gear set chamber is thus defined by the housing, in particular, by a surface on the inner circumference of the housing, in particular directly. For example, the housing can include a gear set housing component, wherein the gear set chamber can be defined by the gear set housing component, in particular, by a surface on the inner circumference of the housing, in particular directly. For example, the gear set housing component is the second of the housing components. The gear set includes, for example, at least or exactly two gears, in particular, meshing with each other. The power transmission device also includes a clutch device, which is particularly provided outside the transmission mechanism, and preferably outside the gear set, and is, for example, configured as a multiple clutch, in particular, a dual clutch having at least or exactly two clutches. Furthermore, it is conceivable that the clutch device includes more than two clutches, such as, for example, a triple clutch having at least three or exactly three clutches. The clutch device is disposed in a clutch chamber of the housing, wherein the clutch chamber is, for example, formed by a surface on the inner circumference of the housing, in particular directly. For example, the clutch chamber is defined by the clutch housing, in particular by the inner circumferential surface of the clutch housing, in particular directly, wherein the clutch housing is, for example, the second or third part of the housing component. The power transmission device also includes a differential unit, which is also referred to as a differential mechanism or is configured as a differential mechanism. A differential mechanism is also simply called a differential. In particular, at least one or exactly two wheels of a motor vehicle can be driven, for example, via the differential mechanism, in particular by means of a power unit. The differential unit includes a crown gear.The crown gear is a gear which is provided in particular in addition to the above-mentioned gears.

[0006] The power transmission device also has an oil sump, also referred to as a sump, which contains a lubricant and coolant in the form of oil. Oil is a liquid with which, for example, transmission elements and / or wheelsets and / or clutch arrangements and / or crown wheels can be lubricated and / or cooled. The oil sump is arranged in the bottom region of the wheelset compartment and is designed to collect the oil used at least for lubricating and cooling the transmission elements. This means that, in particular after cooling and lubricating the transmission elements, the oil accumulates in the bottom region, forming the oil sump.

[0007] In order to enable particularly advantageous oil guidance, also known as oil directing, of the oil, a differential capsule device is provided according to the invention. Preferably, the differential capsule device is separate from the housing, therefore in particular from the housing component, and is, for example, at least indirectly, in particular directly, fastened to the housing. The differential capsule device is arranged on an axial end side, also known as an axial side, of the differential unit. This means that the differential unit has two axial end sides, which face away from and are opposite each other in the axial direction of the differential unit, and therefore in the axial direction of the drivetrain, wherein the differential capsule device is arranged on one of the axial end sides of the differential unit. The axial direction of the differential unit coincides with the axis of rotation about which the crown gear can rotate relative to the housing. Therefore, during operation of the drivetrain, for example, the crown gear rotates relative to the housing about the axis of rotation, whereby, for example, during operation of the drivetrain, the motor vehicle is driven by means of or via the drivetrain. The differential capsule device is designed as an at least substantially radial annular body which is arranged in the radial region of the crown gear and extends in the circumferential direction of the differential unit, in particular the crown gear, in particular around the axis of rotation, extending over a maximum of 75% of the circumference of the differential unit, in particular the crown gear, and thus over a maximum of three-quarters of the circumference. This means that when viewed in the circumferential direction of the crown gear extending around the axis of rotation, the differential capsule device is annular and in this case is designed as a ring or a ring-like ring, wherein, however, the ring does not extend completely circumferentially or continuously in the circumferential direction extending around the axis of rotation of the differential unit, but rather the ring extends over a maximum of 75% of the circumference of the differential unit, in particular the crown gear, in the circumferential direction extending around the axis of rotation of the differential unit, so that, for example, the ring or the annular body and the differential capsule device extend over a maximum of 270 degrees in the circumferential direction extending around the axis of rotation of the differential unit or the crown gear. In other words again, the annular body extends circumferentially, i.e. over 360 degrees in a circumferential direction extending around the axis of rotation of the differential unit and the crown gear, so that the annular body is not closed circumferentially, i.e. in the circumferential direction of the differential unit, but rather the annular body is open circumferentially, i.e. in the circumferential direction extending around the axis of rotation of the differential unit, so that the annular body extends over a maximum of 75% of the circumference of the differential unit or, respectively, does not extend over more than 270 degrees in the circumferential direction of the differential unit, i.e. in the circumferential direction extending around the axis of rotation of the differential unit and thus over a maximum of 270 degrees of the crown gear.Thus, the aforementioned circumferential region of the crown gear is a region extending in the circumferential direction of the differential unit, in which the annular body is arranged or extends, wherein the circumferential region does not extend over 360 degrees in the circumferential direction of the differential unit about the axis of rotation, i.e., does not extend completely circumferentially, but rather, when viewed in the circumferential direction of the differential unit, the radial region in which the annular body is arranged extends over a maximum of 75% of the circumference of the differential unit, i.e., in particular, over a maximum of 270 degrees. For example, when viewed in a plane perpendicular to the axial extension of the differential unit and, for example, from the direction of the clutch device, in particular extending toward the differential capsule device, the differential capsule device and the annular body extend counterclockwise in the circumferential direction of the differential unit from approximately 1 o'clock to approximately 4 o'clock.

[0008] The differential capsule device has an opening for draining oil from the differential unit on an axial side of the differential capsule device facing the wheelset chamber, in particular, on the front side. For example, the differential capsule device has two axial sides, in particular, end sides, which face away from or are opposite each other in the axial direction of the differential unit, and therefore in the axial direction of the differential capsule device, wherein the differential capsule device has the opening on one of its axial sides. In particular, the opening is a through-hole, for example, configured as a hole and / or formed by machining, through which oil can flow, thereby draining or discharging oil from the differential unit and supplying it to, for example, an oil sump. It is conceivable that the opening is a channel, also called an oil channel, through which oil from the differential unit can flow, thereby draining or discharging oil from the differential unit. In other words, after the differential unit, in particular the crown gear, has been cooled and / or lubricated, oil can flow from the differential unit through the opening and thus be drained from the differential unit through the opening.

[0009] The differential capsule device has an oil ramp on its axial side facing the wheelset chamber, arranged obliquely with respect to the circumferential direction, for directing oil flung from the crown gear at a first driving speed of the motor vehicle back into the oil sump. In other words, when the motor vehicle is driven by the powertrain at the first driving speed, particularly when traveling along the ground, the crown gear rotates relative to the housing about the axis of rotation, and oil for lubricating and cooling the crown gear is flung from the crown gear. The oil flung from the crown gear at the first driving speed can, for example, be collected by means of the oil ramp and / or flow along the oil ramp and directed to the oil sump, i.e., returned, by means of the oil ramp.

[0010] Furthermore, the differential capsule device has an oil guide channel on its axial side facing the wheelset compartment, particularly in the axial direction of the differential unit, and thus in the axial direction of the drivetrain as a whole. This channel is arranged in an upper region in the vertical direction of the vehicle when the drivetrain is installed, extends circumferentially around the differential unit, and terminates at an opening. The channel is used to guide oil flung from the crown gear at a second driving speed of the motor vehicle that is higher than the first driving speed back to the oil sump. In other words, the oil guide channel, arranged on the axial side of the differential unit facing the wheelset compartment, is arranged in an upper region in the vertical direction of the vehicle when the drivetrain is installed, particularly in the upper region of the differential capsule device. The drivetrain is in its installed position when the motor vehicle having the drivetrain is manufactured. In this case, the oil guide channel extends in a circumferential direction around the axis of rotation of the differential unit, terminating at or at an opening. When the motor vehicle is driven by the drivetrain at a second driving speed that is higher than or greater than the first driving speed, particularly when traveling along the ground, oil is flung from the crown gear. Oil flung out by the crown gear at the second driving speed can flow into and / or be flung out into the oil guide channel, where it can then flow through the oil guide channel and be directed back into the oil sump. The differential capsule device thus makes it possible to collect the oil flung out by the crown gear across all speed ranges and direct it back into the oil sump, for example, to the suction area of a pump, by means of which oil can be drawn in and delivered, in particular from the sump, in particular in such a way that the oil drawn in and delivered by the pump is (re)delivered by the pump to the transmission element and / or the wheelset and / or the crown gear and / or the differential unit and / or the differential capsule device. For example, the pump can be an electric pump, also referred to as an oil pump. As can be seen, the differential capsule device has at least three functions. The first function consists of allowing oil to be discharged from the differential unit through an opening in the differential capsule device. The second function consists of allowing oil discharged from the crown gear at the first driving speed to be directed back into the oil sump by means of an oil ramp. The third function consists in that, by means of the oil guide channel, the oil thrown off the crown gear at the second driving speed can be led back into the oil sump. Thus, the oil can form, for example, three flows, also referred to as oil flows. The first flow is formed, for example, by the oil flowing out of the clutch chamber. The second flow is, for example, oil thrown off the crown gear at a first, low or relatively low driving speed. The third flow is formed or constituted, for example, by the oil thrown off the crown gear at a high or higher second speed. The first speed is, for example, in the range of 0 to 25 km / h, wherein the second speed is, for example, in the range of 25 to 250 km / h. The oil flows can be combined into a total flow by a differential capsule device (also referred to as a differential capsule device) and, for example, smoothed.In other words, for example, the total flow can be smoothed, particularly on its path to the oil sump, and particularly on its path to at least one or more intake ports of the oil filter and / or the oil sump of the powertrain, thereby enabling particularly advantageous oil guidance. In particular, the differential capsule device is used to enclose the differential unit, or clutch housing component, also known as the clutch housing, particularly via a cover in the form of the differential capsule device. The flows, for example, originate from different oil chambers, which are, for example, at least partially separated from one another. The first oil chamber is, for example, the clutch chamber. With the aid of the differential capsule device, the oil flows from the particularly separated oil chambers can be brought together, in particular to form a total flow. Compared to conventional solutions, the oil drawn in by the pump has a lower air content, as the differential capsule device also serves to smooth, particularly deaerate, the oil, particularly the total flow. Consequently, the traction performance of the powertrain can be optimized compared to conventional solutions. In particular, the differential capsule device allows foamed oil to drain in a smoothed manner, particularly from the clutch chamber, and thus from the clutch unit back to the oil sump. The oil reaches the oil sump and / or the intake opening in a degassed state, so that the oil can be guided and conveyed in a particularly advantageous manner.

[0011] In an advantageous embodiment of the invention, in the installed position of the drive unit, in particular viewed in a plane perpendicular to the axial extension of the differential unit, the opening is arranged approximately at nine o'clock, thereby enabling particularly advantageous oil guidance.

[0012] Another embodiment of the present invention is distinguished by a differential capsule device that is designed, in particular, to be independent of the transmission housing component, and in particular to be directly attached to the transmission housing component. Preferably, in the installed position of the power transmission device, the differential capsule device covers an oil outlet area for the oil flowing out of the clutch housing on the side of the clutch housing component that faces the housing and forms the clutch chamber. Thus, the differential capsule device can be used dually or on both sides, i.e., on both axial sides, to guide the oil as needed. Thus, for example, a fourth function of the differential capsule device includes the differential capsule device covering the oil outlet area on the side of the differential capsule device that faces the clutch housing component. For example, the side of the differential capsule device that faces the clutch housing component, in particular in the axial direction of the differential unit, can be the other of the axial sides of the differential capsule device. Thus, a dual-side use of the differential capsule device is possible, enabling oil to be advantageously guided on both axial sides of the differential capsule device as needed.

[0013] Another design variant of the present invention is characterized by the differential capsule device having a displacement body with a ramp labyrinth. Thus, for example, the fifth function of the differential capsule device includes a displacement body with a ramp labyrinth. Preferably, the displacement body with the ramp labyrinth is arranged at approximately the five o'clock position, particularly in the plane extending perpendicularly to the axial direction. This allows for particularly advantageous oil guidance, stabilization, and, in particular, degassing. For example, the displacement body with the ramp labyrinth is arranged on the side of the differential capsule device facing the clutch housing component.

[0014] Finally, it has proven particularly advantageous that, in the area where the auxiliary take-off / transfer gearbox (also known as a PTU (Power Take-off Unit)) for all-wheel drive variants is located, the outer side of the differential capsule unit has an inwardly concave curved profile, for example, curving concavely on the side facing this area or the auxiliary take-off, i.e., curving away from this area or the auxiliary take-off. Thus, the differential capsule unit can be used in at least nearly all derivatives or variants of a motor vehicle, and thus, for example, in variants with two-wheel drive as well as in variants with all-wheel drive or four-wheel drive, i.e., can be installed therein, making the variant particularly economical to implement.

[0015] A second aspect of the present invention relates to a motor vehicle, also referred to simply as a vehicle, and preferably configured as an automobile, in particular a passenger car, and having a drivetrain according to the first aspect of the present invention. The advantages and advantageous configurations of the first aspect of the present invention are to be regarded as those of the second aspect of the present invention, and vice versa.

[0016] Further advantages, features, and details of the invention are given in the following description of preferred embodiments and with reference to the accompanying drawings. The above-mentioned features and combinations of features mentioned in the description, as well as the features and combinations of features mentioned in the description of the drawings and / or shown alone in the drawings, can be used not only in the respective combination but also in other combinations or alone without departing from the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In the attached figure:

[0018] Figure 1 shows a fragment of a schematic cross-sectional perspective view of a power transmission device for a motor vehicle;

[0019] Figure 2 A schematic perspective view showing a differential capsule device of a power transmission device;

[0020] Figure 3 Another schematic perspective view of a differential capsule device is shown;

[0021] Figure 4Another schematic perspective view of a differential capsule device is shown;

[0022] Figure 5 shows a partial schematic diagram of the power transmission device on the second axial end side of the differential capsule device along the y direction;

[0023] Figure 6 shows a partial schematic longitudinal sectional view of the power transmission device in the x direction;

[0024] Figure 7 shows a detail of another schematic longitudinal sectional view of the power transmission device in the x direction;

[0025] Figure 8 shows a partial schematic cross section of the power transmission device in the y direction;

[0026] Figure 9 A detail of another schematic longitudinal section through the power transmission device in the x-direction is shown. DETAILED DESCRIPTION

[0027] In the figures, identical or functionally identical elements are provided with the same reference symbols.

[0028] Figure 1 A drive train 10 for a motor vehicle (also referred to as vehicle for short) is shown in a partially schematic sectional perspective view. This means that the motor vehicle, which is preferably designed as a motor vehicle, in particular a passenger car, has a drive train 10 in its finished state. The motor vehicle can be driven by means of or via the drive train 10. The drive train 10 has a housing 12, which can be of one-piece, thus integral, or of multiple parts. For example, in combination with Figure 8As can be seen, the power transmission device 10 has a transmission 14, which is also simply called a transmission and has a transmission element 16, for example, which is designed as a gear or includes a gear, which is arranged in a transmission housing part 18 of the housing 12. For example, a transmission chamber 22 is defined by the transmission housing part 18, in particular by a surface 20 on the inner peripheral side of the transmission housing part 18, in particular directly, wherein the transmission element 16 can be arranged in the transmission chamber 22 and thus in the transmission housing part 18. A wheel set is also provided, which is arranged in a wheel set chamber of the housing 12. The power transmission device 10 also includes at least one clutch device, which can be in the form of a double clutch or a triple clutch or other clutch. The clutch device is arranged in a clutch chamber of the housing 12, wherein the clutch chamber can be defined, for example, by the clutch housing part, in particular by a surface on the inner peripheral side of the clutch housing part, in particular directly. It is conceivable that the transmission housing part 18 and the clutch housing part are components that are independent of each other and are connected to each other, or that the transmission housing part 18 and the clutch housing part are formed integrally with each other and thus are formed from a single piece. Figure 1 In the embodiment, for example, the clutch housing components and the clutch device are at least largely concealed so that the observer can see the clutch housing components and the clutch device at least partially concealed. Figure 1 1. The view from the clutch device to the housing 12 and thus to the differential capsule device 24, which is also referred to as a differential capsule device and will be explained in more detail below. The power transmission device 10 also includes a differential unit 26, which is also simply referred to as a differential and is particularly configured as a differential mechanism and has a crown gear 28. The crown gear 28 is rotatable relative to the housing 12 about an axis of rotation 36. The power transmission device 10 also has an oil sump 30, which is located at Figure 5 It is particularly schematically shown in FIG. 1 , which is also called the bottom shell, and its oil level, also called the liquid level, as shown in FIG. Figure 5 The oil sump 30 is shown and designated by reference numeral 32 . The oil sump 30 is arranged in a bottom region 34 of the housing 12 , in particular of the transmission housing part 18 , and serves to collect oil which is used at least for lubricating and cooling the transmission element 16 .

[0029] In order to achieve a particularly advantageous oil guidance, also referred to as oil guidance, the drive train 10 has a differential capsule arrangement 24. Figure 1It can be seen that the differential capsule device 24 is arranged on the axial end side S1 of the differential unit 26 and is designed as a radial annular body, which is arranged on the radial area of the crown gear 28, that is, extends in the circumferential direction extending around the rotation axis 36 of the differential unit 26, so that the differential capsule device 24 is designed as a radial annular body, that is, extends in the circumferential direction of the differential unit 26, and therefore also extends in the circumferential direction of the crown gear 28, however, it does not extend completely in the circumferential direction of the differential unit 24, that is, it does not extend over 360 degrees, but the annular body extends in the circumferential direction of the differential unit 26 and the crown gear 28, over a maximum of 75% of the circumference of the differential unit 26, and therefore in particular over a maximum of 270 degrees. The circumferential direction of the differential unit 26 and therefore the circumferential direction of the crown gear 28 is Figure 1 The differential unit 26 is shown by a double arrow 38 and extends around the rotation axis 36. During operation of the power transmission device 10, the axial direction of the crown gear 28 of the differential unit 26 coincides with the rotation axis 36, and the differential unit 26 rotates around the rotation axis 36 or can rotate relative to the housing 12. In this case, the axial direction of the differential unit 26 extends in the axial direction of the crown gear 28 or coincides with the axial direction of the crown gear 28.

[0030] from Figures 2 to 4 The differential capsule device 24 can be seen particularly clearly in FIG. Figure 2 , an arrow indicates a first flow of oil, which is also referred to as first oil flow 40, first flow, first partial flow, or first sub-flow. The first oil flow, also referred to as first oil flow 40, originates in particular from the clutch chamber and, therefore, in particular, from the clutch arrangement. In other words, first oil flow 40 is formed in particular from oil that has flowed out of the clutch chamber and, therefore, out of the clutch arrangement, in particular after the oil has cooled and / or lubricated the clutch arrangement.

[0031] exist Figure 1 In the present invention, PTU denotes the area in which the auxiliary take-off device, also referred to as the power take-off unit, is arranged for all-wheel drive variants of the motor vehicle. In this case, the differential capsule device 24 has an arcuate profile BK in the area PTU or at a position ST on its outer side AS facing the area PTU. The profile BK is particularly concave inwardly in the radial direction of the differential unit 26 and is particularly curved away from the area PTU in the radial direction of the differential unit 26, and is therefore concave.

[0032] exist Figure 2 In FIG, a second oil flow 42 is also indicated by an arrow, which is also referred to as a second oil flow, a second oil flow, a second partial flow, a second sub-flow or a second oil flow. The second flow is formed, for example, by oil that is thrown or ejected by the crown wheel 28 at a lower first driving speed of the motor vehicle, that is, when the motor vehicle is traveling at the first driving speed. In addition, Figure 2 4. A third oil flow is shown by arrow 44, which is also referred to as a third oil flow, a third oil flow, a third partial flow, a third sub-flow or a third oil flow. The third flow is formed, for example, by oil that is ejected or thrown out of the crown gear 28 at a second driving speed that is higher than the first driving speed, i.e., when the motor vehicle is traveling at a second driving speed that is higher than or greater than the first driving speed. By means of the differential capsule device 24, the oil flows 40, 42 and 44 are combined, in particular to form Figure 2 The total oil flow 46 is shown by arrows in FIG. 4 and the oil flow and / or the total oil flow 46 is smoothed in particular on its way to and into the oil sump. This smoothing of the oil, and therefore of the partial flows and / or the total flow, is also referred to as oil smoothing, e.g. Figure 2 The movement is carried out in the region of the differential capsule device 24, which is indicated by 48. Figure 2 In the embodiment, an inlet of the differential capsule device 24 is indicated by reference numeral 50, wherein, for example, the first flow enters the differential capsule device 24 via or at the inlet 50. A second inlet of the differential capsule device 24 is indicated by reference numeral 52, wherein, for example, oil ejected or flung from the crown gear 28 enters the differential capsule device 24 at or via the second inlet 52. For example, the wheelset may include a differential unit and / or a crown gear.

[0033] For example, in Figure 3 and Figure 4 The first axial end side AS1 of the differential capsule device 24 can be seen in FIG. In the finished state of the power transmission device 10, the first axial end side AS1 of the differential capsule device 24 faces the wheel set chamber and / or the differential unit 26, in particular the crown gear 28. The oil collecting chamber, which is particularly arranged on the axial side AS1, is denoted by reference numeral 54. The oil channel of the differential capsule device 24, also known as the oil guide channel, is particularly arranged on the axial side AS1. Figure 3 Indicated by reference numeral 56. Thus, for example, the differential capsule device 24 has an oil ramp 58 arranged obliquely with respect to the circumferential direction on its axial side AS1 facing the wheelset chamber in the axial direction of the differential unit 26, for guiding the oil thrown out from the crown gear 28 at the first driving speed back into the oil pan 30. The oil channel 56 is an oil guide channel arranged on the axial side AS1 of the differential capsule device 24, which faces the wheelset chamber in the axial direction of the differential unit 26, wherein, in the installation position of the power transmission device 10, the oil channel 56 (oil guide channel) is arranged in the upper area BE of the differential capsule device 24 in the vertical direction of the vehicle. In this case, the power transmission device 10 is in the installation position shown in the figure in the manufactured state of the motor vehicle having the power transmission device 10. From Figure 3It can be seen that the oil guide channel (oil channel 56) extends around the circumferential direction of the differential unit 26, which extends around the axis of rotation 36 and therefore around the axial extension of the differential unit 26, and ends at the opening 60 of the differential capsule device 24, wherein the oil guide channel (oil channel 56) is used to guide the oil to be thrown out or already thrown out from the crown gear 28 at the second driving speed back into the oil pan 30. The differential capsule device 24 has an opening 60 on its axial side AS1 facing the wheel set chamber in the axial direction of the differential unit 26, which is used to guide the oil out of the differential unit 26. In particular, the second and third oil flows 42 and 44 indicated by the arrows can be combined in or through the oil collection chamber 54, as a result of which a particularly advantageous and required oil guidance can be achieved. From Figure 3 It can be seen that, in the installed position of the drivetrain, the opening 60 is arranged at approximately the nine o'clock position in a plane perpendicular to the axial direction of the differential unit 26 and therefore perpendicular to the axis of rotation 36. For example, the differential capsule device 24 is fastened to the transmission housing component 18 and, for example, in the installed position of the drivetrain 10, covers an oil outlet region, in particular an oil outlet region of the transmission housing component 18, on the side facing the clutch housing component, wherein, for example, the oil outlet region serves for oil flowing out of the clutch housing, in particular the clutch chamber.

[0034] exist Figure 4 The oil channel 56, the oil collecting chamber 54 and the oil ramp 58 can be seen particularly clearly. Figure 2 The second axial side AS2 of the differential capsule device 24 is shown, wherein the axial sides AS1 and AS2 are, for example, axial end sides of the differential capsule device 24. Figure 2 As can be seen particularly clearly in FIG, the axial sides AS1 and AS2 of the differential capsule device 24 face away from and opposite each other in the axial direction of the differential unit 26. In this case, for example, the second axial side AS2 faces away from the differential unit 26 and / or the wheelset chamber in the axial direction of the differential unit 26 and, for example, faces the clutch device and the clutch chamber.

[0035] exist Figure 5 In FIG. 1 , the wall of the differential capsule device 24 can be seen, which is arranged above the oil level 32 (also referred to as the oil level) in the vertical direction of the vehicle in the installed position of the power transmission device 10 and is denoted by reference numeral 62. In particular, the wall 62 is or serves as a separating element between the smoothing chamber between the differential unit 26 and the oil sump 30 (see FIG. 1 ). Figure 8 ). In addition, a wall cover of the differential capsule device 24 is indicated by reference numeral 64, which is provided above the ribs between the bearings above the oil level. Figure 6 and Figure 7 The total flow and region 48 are shown, where Figure 6 Shown Figure 5 Schematic diagram of the AA section, Figure 7 Shown Figure 5 Schematic diagram of the BB section.

[0036] from Figure 2 and Figure 9 It can be seen that the differential capsule device 24 comprises a displacement body 66 having a ramp labyrinth 68 , in particular for further stabilization and / or degassing of the oil.

[0037] Reference Signs List

[0038] 10 Power transmission equipment

[0039] 12 Housing

[0040] 14 Transmission Mechanism

[0041] 16 Transmission elements

[0042] 18 Transmission housing parts

[0043] 20 Inner circumference surface

[0044] 22 Transmission Mechanism Room

[0045] 24 Differential Capsule Device

[0046] 26 differential unit

[0047] 28 Crown gear

[0048] 30 Oil pan

[0049] 32 Oil level

[0050] 34 bottom area

[0051] 36 Rotation axis

[0052] 38 Double Arrow

[0053] 40 First oil flow

[0054] 42 Second oil flow

[0055] 44 Third oil flow

[0056] 46 Total oil flow

[0057] 48 areas

[0058] 50 Entrance

[0059] 52 Entrance

[0060] 54 Oil Collection Chamber

[0061] 56 Oil channel

[0062] 58 Oil Ramp

[0063] 60 opening

[0064] 62 wall

[0065] 64 Wall Cover

[0066] 66 Exclusion Body

[0067] 68 Ramp Maze

[0068] AS lateral

[0069] AS1 axial side

[0070] AS2 axial side

[0071] BE area

[0072] BK curved profile

[0073] PTU Area

[0074] S1 Axial end side

[0075] ST position.

Claims

1. A power transmission device (10) for a motor vehicle, the power transmission device comprising: - housing (12); a transmission (14) having a transmission element (16) arranged in a transmission housing part (18) of the housing (12); - at least one wheelset disposed in a wheelset compartment of the housing (12); - at least one clutch device arranged in a clutch chamber of the housing (12); - a differential unit (26) having a crown gear (28); and an oil sump (30) arranged in the bottom region (34) of the transmission housing part (18), The oil sump is used to collect oil, which is used at least for lubricating and cooling the transmission element (16), and is characterized in that: A differential capsule device (24) is provided, which is arranged on the axial end side (S1) of the differential unit (26) and is designed as a radial annular body, which is arranged in the radial region of the crown gear (28) and extends in the circumferential direction (38) of the differential unit (26) over a maximum of 75% of the circumference of the differential unit (26), - an opening (60) for draining oil from the differential unit (26) on the axial side (AS1) of the differential capsule device (24) facing the wheelset chamber; - an oil ramp (58) arranged obliquely relative to the circumferential direction on the axial side (AS1) of the differential capsule device (24) facing the wheelset chamber, the oil ramp being used to guide the oil thrown off the crown gear (28) at a first driving speed of the motor vehicle back into the oil sump (30); - An oil guide channel (56) is provided on the axial side (AS1) of the differential capsule device (24) facing the wheelset chamber, the oil guide channel being arranged in the upper region (BE) in the vertical direction of the vehicle in the installation position of the power transmission device (10), extending in the circumferential direction (38) and terminating at the opening (60), for guiding oil thrown off the crown gear (28) at a second driving speed of the motor vehicle higher than the first driving speed back into the oil pan (30).

2. The power transmission device (10) according to claim 1, It is characterized by: In the installed position of the power transmission device (10), the opening (60) is arranged at the nine o'clock position.

3. The power transmission device (10) according to claim 1 or 2, It is characterized by: The differential capsule device (24) is fixed to the transmission housing part (18) and, in the installed position of the power transmission device (10), covers the oil outlet area for the oil flowing out of the clutch housing on the side of the clutch housing part forming the clutch chamber facing the housing (12).

4. The power transmission device (10) according to any one of the preceding claims, It is characterized by: The differential capsule device (24) has a displacement body (66) with a ramp labyrinth (68).

5. The power transmission device (10) according to claim 4, It is characterized by: The displacement body (66) with the ramp labyrinth (68) is arranged at the 5 o'clock position in the installed position of the power transmission device (10).

6. The power transmission device (10) according to any one of the preceding claims, It is characterized by: In an area (PTU) where an auxiliary take-off for an all-wheel drive variant is arranged, a differential capsule device (24) has an inwardly concave arcuate contour (BK) on an outer side (AS) of the differential capsule device (24).

7. A motor vehicle comprising a drivetrain according to any one of the preceding claims.

Images