Oil guide channel component for installation in a gearbox and gearbox with an oil guide channel component

Description

State of the art

[0001] In the current state of the art, transmissions for motor vehicles are often used in combination with an electric motor drive. As with conventional transmissions, the transmission elements must be lubricated with oil. To increase transmission efficiency and reduce costs, an oil pump for transmission lubrication, which is often used in conventional transmissions, can be dispensed with. The lubrication and cooling of the transmission elements is preferably achieved through passive oil distribution. The lubrication of the rotating transmission elements is important for the reliability of the transmission. Insufficient lubrication can result in an insufficient supply of oil to the bearings of the transmission elements and the sealing rings. This can lead to increased wear and even failure of the transmission elements.

[0002] An oil guide channel part for installation in a motor vehicle transmission is known from DE 10 2017 108 748 B3. The transmission shown has a transmission housing and at least one transmission gear arranged in the transmission housing, which is at least partially arranged in an oil sump of the transmission. A section of the rotating transmission gear rolls through the oil sump and absorbs oil in the process. This process is often described in technical terms as splashing. In order to distribute oil absorbed by the transmission gear more precisely within the transmission, a spectacle-like oil guide channel part is used in the prior art, which can be inserted into the transmission as an insert. The oil guide channel part has several apertures and a guide channel with a receiving opening and an outlet opening, wherein the guide channel has an oil guide direction from the receiving opening to the outlet opening and a channel wall that is closed all the way around and perpendicular to the oil guide direction.In DE 10 2017 108 748 B3, the channel wall is formed by a semi-circular hollow body curved around a gear axis of a transmission gear of the transmission, which, in a predetermined installed state of the oil guide channel part, is located predominantly above an oil sump level of the transmission. The curved guide channel has a receiving opening designed as a collecting mouth for receiving oil thrown up by another transmission gear, which meshes with the transmission gear surrounded by the semi-circular hollow body, and transported further by the second transmission gear to the collecting mouth. An end section of the semi-circular hollow body facing away from the collecting mouth and closed except for a throttle bore forms an oil collection area for collecting oil conveyed through the guide channel. The throttle bore forms the only outlet opening of the guide channel and therefore simultaneously represents an outlet for the oil from the at least one oil collection area.The throttle bore is located vertically above the meshing area of ​​the two transmission gears, so that the outflowing oil flow flows into their meshing area and wets the contact surfaces of the teeth.

[0003] Another oil guide channel part for installation in a motor vehicle transmission with an oil collection area having a first collection basin is known from EP 2 700 849 A1. Disclosure of the invention

[0004] The invention relates to an oil guide channel part for installation in a transmission, in particular for installation in a motor vehicle transmission, wherein the oil guide channel part has a guide channel with a receiving opening and with an outlet opening, wherein the guide channel has an oil guide direction from the receiving opening to the outlet opening and a channel wall that is closed all the way around and perpendicular to the oil guide direction, wherein the oil guide channel part further has at least one oil collection area for collecting oil guided through the guide channel, wherein the oil guide channel part has at least one outlet for oil from the at least one oil collection area.According to the invention, the at least one oil collection region comprises a first collection basin with a first basin wall and a first basin bottom and a second collection basin with a second basin wall and a second basin bottom, wherein the guide channel adjoins the first basin wall and the second basin wall in such a way that, viewed in the oil guide direction of the guide channel, the first basin bottom is arranged between the receiving opening and the outlet opening and the second basin bottom is arranged between the receiving opening and the first basin bottom.

[0005] Furthermore, the invention relates to a transmission, in particular a motor vehicle transmission, with a transmission housing, with an oil guide channel part arranged in the transmission housing with the features described above, and with at least one transmission gear arranged in the transmission housing, which is at least partially arranged in an oil sump of the transmission, wherein the oil guide channel part, in a predetermined installed state which defines an orientation of the oil guide channel part in the transmission housing relative to the force of gravity, is arranged in the transmission housing such that the receiving opening is positioned on the end face of the transmission gear arranged at least partially in the oil sump, the oil conduction direction from the receiving opening to the outlet opening has at least one component running counter to the force of gravity and at least the first basin bottom is arranged above the transmission gear.

[0006] In the context of this application, "oil" refers to a transmission-compatible liquid lubricant, regardless of whether it is marketed commercially as oil. This can, for example, be a lubricant known as ATF (Automatic Transmission Fluid) or similar substances. Preferably, it is MTF.

[0007] A predetermined installation state, which defines an orientation of the oil guide channel part in the transmission relative to gravity, is understood to be an installation state which represents a specific orientation of the oil guide channel part relative to the transmission housing when the orientation of the associated transmission relative to the earth's gravity field is known. The orientation of the transmission relative to the earth's gravity field is generally known for a normal position of the transmission, whereby the normal position is the position in which the transmission is aligned relative to gravity in its intended use. If the transmission is a motor vehicle transmission, the transmission assumes a specific orientation relative to the earth's gravity field when the motor vehicle is aligned horizontally relative to the earth's gravity field in the normal position. This applies regardless of whether the motor vehicle is actually moved horizontally to the earth's gravity field or is driving up an incline with an angle of incline.From a previously known installation position of the gearbox in the motor vehicle, it can therefore be fundamentally deduced how an oil guide channel part is to be installed in the gearbox so that the oil guide channel part assumes a certain orientation relative to gravity in the normal position.

[0008] A component of the oil flow direction that runs counter to gravity from the intake opening to the outlet opening means that the oil flow direction, broken down into movement components, has at least one component directed counter to gravity or movement component. This does not necessarily mean that the entire oil flow direction runs antiparallel to the direction of gravity. The oil flow direction can, for example, also run diagonally to gravity or parallel to gravity.

[0009] An oil guide channel part is understood to be a component that has at least one guide channel for oil transport. The oil guide channel part can be designed to distribute oil supplied to the oil guide channel part within the oil guide channel part under the influence of gravity. The oil guide channel part can in particular be designed as an insert that is inserted into the transmission during assembly. The oil guide channel part can be made of plastic or metal or a plastic-metal composite. The oil guide channel part can be constructed in one piece or in multiple pieces. In particular, it is possible to assemble the oil guide channel part from two or more shell parts that are mechanically connected to one another via snap-in connections or clip connections.

[0010] In the context of the present application, relative to an assumed reference point, the terms "bottom" or "below" denote a position at a point located lower in the direction of gravity, and the terms "top" or "above" denote a position at a point located higher in the direction of gravity, wherein an orientation of the oil guide channel part is assumed which corresponds to the predetermined installation state.

[0011] A transmission oil sump is an area within the transmission housing where oil accumulates under the influence of gravity. A transmission gear that is at least partially located in a transmission oil sump is defined as a gear with a lower part immersed in the oil sump, in the direction of gravity, while an upper part of the gear protrudes from the oil sump. As the transmission gear rotates, it absorbs oil from the oil sump and transports it against gravity to a release point or knock-off point. This process is called "splashing." The circulation and flow rate of the oil through the transmission gear depend directly on the speed and, via viscosity, also on the temperature. The amount of oil transported from the oil sump to a transmission gear causes the oil sump level to drop during operation.The transmission gear can therefore be regarded as an oil-feeding transmission gear. Oil sprayed from the transmission gear and any other transmission gears during rapid rotation in the transmission housing can reach places from which there is no rapid return flow to the oil sump. To ensure that sufficient oil is nevertheless pumped by the transmission gear and that the transmission does not run dry, the oil sump must contain an appropriate amount of oil. On the other hand, too high an oil quantity in the oil sump is undesirable, as this increases the disadvantageous drag losses of the transmission. As a compromise, it is therefore desirable to direct the amount of oil transported by the transmission gear as precisely as possible to the lubrication points in the transmission in order to avoid splashing losses and to be able to reduce the level in the oil sump to a level at which the drag losses of the transmission are as low as possible. This is achieved by the oil guide channel section. Advantages of the invention

[0012] The oil guide channel part according to the invention enables a more targeted oil supply to bearings of rotating transmission elements within a transmission housing. This is achieved in that the at least one oil collection area has a first collection basin with a first basin wall and a first basin base, and a second collection basin with a second basin wall and a second basin base. The guide channel adjoins the first basin wall and the second basin wall in such a way that, viewed in the oil flow direction of the guide channel, the first basin base is arranged between the receiving opening and the outlet opening, and the second basin base is arranged between the receiving opening and the first basin base.

[0013] Since the lubrication points in a transmission are located at different vertical positions, the oil must be pumped upwards from the oil sump located at the bottom of the transmission housing to the input shaft, with lubrication points also located in between. A two-stage oil collection area with a second collection basin, the second basin bottom of which is located between the receiving opening and the first basin bottom, advantageously ensures that the oil can be more easily delivered to lubrication points that are located at different vertical levels relative to gravity.

[0014] The oil guide channel part is particularly advantageously designed to be installed in a transmission in a predetermined installation state, which defines an orientation of the oil guide channel part relative to gravity. In an orientation corresponding to the predetermined installation state, the first basin base and the second basin base are aligned approximately perpendicular to gravity, and the oil conduction direction runs from the receiving opening to the outlet opening against gravity. The oil guide channel part according to the invention can be installed in a transmission in such a way that, in the predetermined installation state, the receiving opening of the guide channel can be positioned on the end face of a transmission gear of the transmission, and the basin base can be positioned above the transmission gear.Oil taken up in the guide channel through the receiving opening can be transported to the outlet opening against the force of gravity, whereby oil escaping from the outlet opening can collect in the first collecting basin.

[0015] In contrast to the solutions known from the prior art, in which the oil collection area forms the end region of a semi-circular hollow body curved around a gear axis, in the present invention the oil collection area comprises a first and second collection basin. At least the first oil collection basin can be arranged above the oil-promoting transmission gear. The second oil collection basin is arranged below the first oil collection basin and can be located, in the direction of gravity, for example, at least partially below the end wall of the oil-promoting transmission gear or completely or partially above it. The supply of oil accumulating in the first and second collection basins causes the oil sump at the bottom of the transmission housing to sink during operation. The guide channel is designed as a simple, circumferentially closed channel which can extend in a straight line from the receiving opening to an outlet opening, preferably over 80% of its longitudinal extension direction.The opening cross-section of the intake opening can correspond to the opening cross-section of the outlet opening. The guide channel with the surrounding channel wall represents a guide channel integrated into the oil guide channel section.

[0016] In contrast to the prior art, the oil guide channel section is designed so that the oil does not collect in the guide channel, but rather outside the guide channel in the first and second collecting basins. This advantageously ensures sufficient lubrication of the gearbox bearings even during speed fluctuations, since during operation the supply contained in the first and second collecting basins can initially be used to supply the lubrication points. At least one drain, but preferably several drains can be provided on the first and second collecting basins in order to supply oil to different bearings in the gearbox. Advantageously, compared to the prior art, the quantity of oil pumped through the guide channel during operation can be made less dependent on the quantity of oil draining from the oil collection area via a drain.The guide channel serves solely to fill the first and second reservoirs, while the outflow of oil from the first reservoir and the second reservoir can be adjusted via the geometric design of the reservoirs and the geometric design of the associated drains. The oil supply to the bearing points of the transmission elements can therefore be advantageously optimized both locally and over time. This results in improved lubrication of the bearing points, particularly in transmissions in which rotating transmission elements are arranged one above the other in several planes with respect to gravity.

[0017] Since the first and second reservoirs can be advantageously used as intermediate storage, faster lubrication is available when the electric motor driving the transmission is reactivated, even during short deactivation periods. During longer downtimes, the first reservoir and / or the second reservoir can optionally be completely drained toward the oil sump via a small drain opening in the respective reservoir base. However, the drain openings are by no means mandatory.

[0018] Advantageous embodiments and further developments of the invention are made possible by the features specified in the dependent claims.

[0019] Advantageously, an end of the guide channel wall facing away from the receiving opening can form a wall that protrudes beyond the first basin floor of the first collection basin and delimits the outlet opening. Oil draining over this wall can thus advantageously drain directly into the first collection basin and fill it.

[0020] Advantageously, the guide channel can be continuously closed from the receiving opening to the outlet opening and can be linear over at least 80% of its longitudinal extent. This enables the oil supplied to the guide channel to be transported as unhindered as possible towards the outlet opening. The linear guide channel can be aligned in a transmission in particular such that, in the predetermined installed state, a section of it runs tangentially to an end face of a transmission gear. The receiving opening of the guide channel can, for example, be designed as a catch mouth, wherein the circumferential edge of the receiving opening can be chamfered according to the tangential angle of the guide channel so that the receiving opening can be brought as close as possible to the end face of the transmission gear. The contour of the circumferential edge can be adapted to the radius of curvature of the end face of a transmission gear.In an orientation of the oil guide channel part which corresponds to the predetermined installation state, oil escaping from the outlet opening of the guide channel flows in the direction of gravity and collects in the first collecting basin, which is thereby filled.

[0021] The second reservoir can be easily filled by oil flowing from the first reservoir over a first dam. This initially fills the first reservoir to the level of the first dam. Once this level is reached, oil in or along the oil guide channel drains over the first dam toward the second reservoir.

[0022] Advantageously, the first reservoir has at least one first outlet, and the second reservoir has at least one second outlet, with oil from the second reservoir flowing to the second outlet, in particular via a second dam. The at least one first outlet and the at least one second outlet can supply lubricating oil to different bearings at different vertical levels in a transmission. The oil supply to the bearings is advantageously "passive," i.e., by the oil draining through the respective associated outlets.

[0023] Furthermore, the first collection basin can be provided with a partition wall which projects from the first basin floor and divides the first collection basin into at least two sub-regions, wherein the outlet opening opens towards a first sub-region and the second sub-region is connected to the first sub-region via a hole in the partition wall. When the first collection basin is filled, the partition wall is flooded so that oil reaches both sub-regions. From the second sub-region, the oil is only drained away via the hole in the direction of the first sub-region. In this case, the partition wall can in particular be designed as a surge breaker and has a keel facing the outlet opening, from which sub-walls which are bent backwards in opposite directions extend to a first outlet and a third outlet.Oil exiting the guide channel's outlet port hits the keel and is split into two partial streams that flow toward opposite outlets.

[0024] The oil guide channel part according to the invention can be used particularly advantageously in combination with a transmission, wherein the oil guide channel part can be used in a transmission housing of the transmission. The transmission has at least one transmission gear arranged in the transmission housing, which is at least partially arranged in an oil sump of the transmission. In a predetermined installed state, which defines an orientation of the oil guide channel part in the transmission housing relative to gravity, the oil guide channel part is arranged in the transmission housing such that the receiving opening is positioned on the end face of the transmission gear arranged at least partially in the oil sump, the oil conduction direction from the receiving opening to the outlet opening has at least one component running counter to gravity, and at least the first basin bottom is arranged above the transmission gear.

[0025] During operation, oil thrown up from the oil sump by the gear wheel advantageously enters the receiving opening and along the oil guide direction of the guide channel to the outlet opening.

[0026] Advantageously, the first collecting basin is provided with at least one first outlet, and the second collecting basin is provided with at least one second outlet. An outlet opening of the first outlet supplies a bearing of a first transmission element, in particular the bearing of an input-side rotor shaft mounted in the transmission, with oil, and an outlet opening of the second outlet supplies a bearing of a second transmission element, in particular a pinion bearing, with oil. Different bearings of transmission elements of the transmission can be supplied with oil via the first outlet and the second outlet, and optionally further outlets. Short description of the drawings

[0027] Possible embodiments of the invention are explained below with reference to the accompanying drawings. The drawings show: Fig. 1 shows a cross section through a transmission of a motor vehicle, which is driven by an electrical machine (not shown), and in which the oil guide channel part can be used, Fig. 2 shows a perspective view of an embodiment of an oil guide channel part according to the invention for use in a transmission, Fig. 3 shows a cross section through a transmission with a transmission housing, which corresponds to the structure in the illustration of the Fig. 1 corresponds, with an oil guide channel part inserted therein in a predetermined installation state, as shown in the Figur 2 was presented. Embodiments of the invention

[0028] Fig. 1 shows a drive device for a motor vehicle, which includes a transmission 100. The description of the transmission serves to explain the possible uses of an oil guide channel part, as described further below.

[0029] The transmission 100 is connected on the input side to an electrical machine (not shown) having a rotor shaft 103. The rotor shaft 103 is mounted in two bearings 175, 175b and meshes with a gear 104, which is non-rotatably coupled to a drive shaft 101 or intermediate shaft of the transmission. The drive shaft 101 is mounted over its outer circumference at two axially spaced bearing points 171 and 172 in a (in Fig. 1 not shown) gearbox housing is rotatably mounted.

[0030] Furthermore, the transmission 100 comprises a clutch device 120, which can be controlled, for example, by means of a preferably electrically actuated rotary actuator 123. The electric actuator 123 can, for example, act via a spindle drive and a shift fork 129 on a clutch element 121, which is axially displaceable on a Fig. 1 not visible guide hub. The coupling element 121 is, for example, ring-shaped and can rotate relative to the shift fork 129. The coupling element 121 can have internal teeth that engage with external teeth of the guide hub, so that the coupling element 121 can be displaced on the guide axis parallel to the axis of the drive shaft 101. The guide hub and the coupling element 121 engaging therewith are mounted on the drive shaft 101 in a rotationally fixed manner. Furthermore, a coupling element 122 is provided, which is coupled in a rotationally fixed manner to a pinion 106. The pinion 106 is rotatably mounted on the drive shaft 101, for example, by means of a bearing 176 designed as a nail bearing. The coupling element 122 can have external teeth.When the rotary actuator 123 is actuated, the spindle drive moves the coupling element 121 in the axial direction via the shift fork until the internal toothing of the coupling element 121 engages with the external toothing of the coupling element 122, whereby the coupling element 121 is coupled to the coupling element 122 in a rotationally fixed manner. As a result of the coupling, the gear 104, the drive shaft 101, the guide hub, the coupling element 121, the coupling element 122 and the pinion 106 rotate as a block around the axis of the drive shaft 101. When uncoupled, the coupling element 121 is separated from the coupling element 122 by means of the rotary actuator 123. Fig. 1 to the right, thereby removing the coupling between the pinion 106 and the drive shaft 101. The pinion 106 can now rotate around the drive shaft 101.

[0031] The pinion 106 meshes with a transmission gear 107. The transmission gear 107 is rotationally coupled to a differential 130. The differential 130 has an output shaft 102 in the form of a first output shaft 102a and a second output shaft 102b, which can be rotationally driven by the differential 130. The transmission gear 107 is fixedly connected to the differential cage 108 of the differential 130. As shown in Fig. 3 As shown, the differential 130 may be integrated into the transmission housing 140 of the transmission 100.

[0032] As already described, in the decoupled state, the coupling between the pinion 106 and the drive shaft 101 is canceled by means of the coupling device 120. If, for example, the electric motor is also switched off while a motor vehicle is in motion, the rotor shaft 103 and the drive shaft 101 are no longer driven. The wheels of the still-rolling motor vehicle now drive the transmission gear 107 via the output shaft 102, which meshes with the pinion 106, so that the pinion 106 rotates around the drive shaft 101. Even in this state, it must be ensured that, for example, the bearing 176 of the pinion 106, arranged above the oil sump of the transmission 100, is sufficiently supplied with oil.

[0033] Fig. 2 shows an embodiment of an oil guide channel part 1 according to the invention, which can be intended, for example, in the Fig. 1 The oil guide channel part 1 can be installed in the illustrated transmission 100. The oil guide channel part 1 can, as shown here, be designed as an insert, which is inserted into the transmission 100 during assembly of the transmission 100. The oil guide channel part 1 can be made of plastic or metal or a plastic-metal composite and can be constructed in one piece or in multiple pieces. In particular, it is possible to assemble the oil guide channel part from two or more shell parts, which are mechanically connected to one another via snap-in connections or clip connections.

[0034] The oil guide channel part 1 has a (in Fig. 3 better visible) guide channel 2 with a receiving opening 11 and with an outlet opening 12, wherein the guide channel 2 from the receiving opening 11 to the outlet opening 12 has an oil guide direction F (shown in Fig. 3 ) and a channel wall 21 which is closed all the way around and perpendicular to the oil guide direction F. The oil guide channel part 1 further has an oil collection area 13a for collecting oil conveyed through the guide channel 2 and an outlet 15a for oil from the oil collection area 13a.

[0035] As in Fig. 2 As shown, the oil collection area 13a comprises a first collection basin 13 at the upper end of the oil guide channel part 1. The first collection basin 13 has a first basin wall 25 and a first basin bottom 24. As best shown in Fig. 3 As can be seen, an end of the channel wall 21 facing away from the receiving opening 11 of the guide channel 2 forms a wall 21a projecting beyond the first basin bottom 24 of the first collecting basin 13 and delimiting the outlet opening 12.

[0036] As in Fig. 2 As can also be seen, the first collecting basin 13 is provided with a partition wall 201 projecting from the first basin bottom 24, the height of which partition wall is less than the height of the basin wall 25. The partition wall 201 divides the first collecting basin 13 into at least two sub-areas, wherein the outlet opening 12 opens into a first sub-area 13b. The second sub-area 13c is connected to the first sub-area 13b via a narrow opening 202 in the partition wall 201. As shown in Fig. 2 As can also be seen, the partition wall 201 can be designed as a surge breaker with a keel 206 facing the outlet opening 12. From the keel 206, partial walls bent backwards in opposite directions extend to a first outlet 15 and a third outlet 16a of the first collecting basin 13. Oil emerging from the outlet opening 12 runs via the wall 21 into the first collecting basin 13 and there strikes the keel 206. The partition wall 201 can be partially flooded so that the oil collects in the first partial area 13b and the second partial area 13a. From there, the oil runs via the first outlet 15 towards the outlet opening 17 and via the third outlet 16a towards the outlet opening 18a. The first outlet 15 and the second outlet 16 can be designed as an angled groove.

[0037] As continued in Fig. 2 As can be seen, the oil collection area of ​​the oil guide channel part 1 comprises a second collection basin 14, wherein the second collection basin 14 has a second basin wall 27 and a second basin bottom 26. The second collection basin 14 is arranged between the receiving opening 11 of the guide channel and the first basin bottom 24 of the first collection basin 13. On its side facing the second collection basin 14, the basin wall 25 of the first collection basin 13 is interrupted by a first dam 203. The height of the first dam 203 is significantly less than the height of the basin wall 25. Oil that fills the first collection basin 13, if the fill level is sufficient, partially drains over the dam 203 in the direction of the second collection basin 14. The basin wall 27 of the second collection basin 14 can also be interrupted at one point by a second dam 204, the height of which is less than the height of the second basin wall 27.If the second collecting basin 14 is sufficiently filled, the oil flows via the second dam 204 to a second drain 16 designed as an angled channel, which has a further drain opening 18.

[0038] The Figur 2 The oil guide channel part 1 shown is designed to be arranged in the transmission housing 140 of a transmission in a predetermined installation state, which defines an orientation of the oil guide channel part relative to the force of gravity G. Without being limited thereto, the oil guide channel part 1 is preferably intended to be inserted into the Fig. 1 illustrated transmission 100. For this purpose, the oil guide channel part 1 can be provided with corresponding projections and retaining cams, with which the oil guide channel part 1 can be installed and anchored in a transmission housing 140 of the transmission 100 in a predetermined orientation relative to the normal position of the transmission 100.

[0039] Fig. 3 shows a gearbox 100, the basic structure of which is similar to that shown in the Fig. 1 shown gearbox, with the oil guide channel part 1 installed therein from Fig. 2 It can be seen that the receiving opening 11 of the guide channel 2 can be positioned on the front side of the gear wheel 107 and in the immediate vicinity of the front side of the gear wheel 107, while the basin bottom 24 of the first collecting basin 13 and, in this embodiment, for example, also the basin bottom 26 of the second collecting basin 14 can be arranged above the gear wheel 107. The oil guide direction F has a component running from the receiving opening 11 to the outlet opening 12 against the force of gravity G. The orientation of the force of gravity G is for the normal position of the transmission 100 in Fig. 3It can be seen that the oil flow direction F runs approximately obliquely to the force of gravity and has a relatively large component that directly opposes the force of gravity. Viewed in the oil flow direction F of the guide channel 2, the first basin base 24 is arranged between the receiving opening 11 and the outlet opening 12, and the second basin base 26 is arranged between the receiving opening 11 and the first basin base 24.

[0040] The guide channel 2 is preferably linear over 80% of its longitudinal extent and, at least in the region of the gear wheel 107, preferably runs tangentially to an end face of the gear wheel 107. The receiving opening 11 can be designed as a catch mouth, wherein the peripheral edge of the receiving opening 11 can be beveled according to the angle formed by the direction of gravity and the conveying direction F, so that the receiving opening 11 can be brought as close as possible to the end face of the gear wheel 107. The contour of the peripheral edge can be adapted to the radius of curvature of the end face of the gear wheel 107, as shown.

[0041] The transmission gear 107 of the transmission 100 is partially arranged in an oil sump 150. The transmission gear 107 receives oil from the oil sump 150 and transports it into the receiving opening 11 of the guide channel 2. The movement impulse of the oil pushes it in the guide channel 2 in the oil flow direction F to the outlet opening 12.

[0042] The oil flowing out of the oil guide channel part 1 via the first outlet 15, the second outlet 18, and the third outlet 18a can be directed in the transmission 100 to different bearings of transmission elements, which may be spatially separated from one another. For example, the first outlet 15 can supply oil via the outlet opening 17, and the third outlet 16a can supply oil via the outlet opening 18a to a first and / or second bearing of a transmission element, in particular to the bearing 175 and the bearing 175b of the input-side rotor shaft 103 mounted in the transmission 100.

[0043] The drain opening 18 of the second drain 16 can supply a bearing of a further transmission element, in particular the bearing 176 of the pinion 106, with oil in another plane which is arranged between the receiving opening 11 and the outlet opening 12.

[0044] It is understood that by means of the first collection basin and the second collection basin and the outlets branching off from them, an optimal supply of lubricating oil to the bearings of rotating transmission elements can be optimally adapted even for differently constructed transmissions.

Claims

1. Oil duct part (1) for installation in a gearbox (100), in particular for installation in a motor vehicle gearbox, wherein the oil duct part (1) has a duct (2) with a receiving opening (11) and an outlet opening (12), wherein the duct (2) from the receiving opening (11) to the outlet opening (12) has an oil guiding direction (F) and a duct wall (21) which is circumferentially closed perpendicularly to the oil guiding direction (F), wherein the oil duct part (1) furthermore has at least one oil collection region (13a) for the accumulation of oil directed through the duct (2), wherein the oil duct part (1) has at least one drain (15a) for oil from the at least one oil collection region (13a), wherein the at least one oil collection region (13a) comprises a first collection reservoir (13) with a first reservoir wall (25) and a first reservoir base (24), characterized in that the at least one oil collection region (13a) comprises a second collection reservoir (14) with a second reservoir wall (27) and a second reservoir base (26), wherein the duct (2) is contiguous to the first reservoir wall (25) and the second reservoir wall (27) in such a manner that, when viewed in the oil guiding direction (F) of the duct (2), the first reservoir base (24) is disposed between the receiving opening (11) and the outlet opening (12), and the second reservoir base (26) is disposed between the receiving opening (11) and the first reservoir base (24).

2. Oil duct part (1) according to Claim 1, characterized in that the oil duct part (1) is designed to be installed in a gearbox (100) in a predetermined installation state which defines an orientation of the oil duct part (1) relative to gravity (G), wherein in an orientation which corresponds to the predetermined installation state, the first reservoir base (24) and the second reservoir base (26) are aligned approximately perpendicularly to gravity (G) and the oil guiding direction (F) from the receiving opening (11) and up to the outlet opening (12) has at least one component running counter to gravity (G).

3. Oil duct part (1) according to Claim 1 or 2, characterized in that an end of the duct wall (21) of the duct (2) facing away from the receiving opening (21) forms a wall (24a) projecting beyond the first reservoir base (11) of the first collection reservoir (13) and delimiting the outlet opening (12).

4. Oil duct part (1) according to one of the preceding claims, characterized in that the duct (2) is continuously closed from the receiving opening (11) to the outlet opening (12) and is formed to be rectilinear on at least 80% of its longitudinal extent.

5. Oil duct part (1) according to one of the preceding claims, characterized in that the second collection reservoir (14) can be filled by an oil draining from the first collection reservoir (13) via a first dam (203).

6. Oil duct part according to one of the preceding claims, characterized in that the first collection reservoir (13) is provided with at least one first drain (15).

7. Oil duct part according to one of the preceding claims, characterized in that the second collection reservoir (14) is provided with at least one second drain (16), wherein oil from the second collection reservoir (14) reaches the second drain (16) in particular via a second dam (204).

8. Oil duct part according to any one of the preceding claims, characterized in that at least the first collection reservoir (13) is provided with a partition wall (201) which protrudes from the first reservoir base (24) and divides the first collection reservoir (13) into at least two sub-regions, wherein the outlet opening (12) opens towards a first sub-region (13b) and the second sub-region (13c) is connected to the first sub-region (13b) via a through opening (202) in the partition wall (201).

9. Oil duct part according to Claim 8, characterized in that the partition wall (201) is designed as a surge breaker, wherein the partition wall has a keel (206) which faces the outlet opening (12), from which sub-walls that are bent backwards in opposite directions extend to a first drain (15) and a third drain (16a).

10. Oil duct part (1) according to one of the preceding claims, characterized in that the oil duct part (1) is designed as an insert part.

11. Gearbox (100), in particular motor vehicle gearbox, having a gearbox housing (140), having an oil duct part (1) according to one of Claims 1 to 10 disposed in the gearbox housing (100), and having at least one gearwheel (107) which is disposed in the gearbox housing (140) and is at least partially disposed in an oil sump (150) of the gearbox (100), wherein the oil duct part (1) in a predetermined installation state in the gearbox (140) which defines an orientation of the oil duct part (1) relative to gravity (G), is disposed in the gearbox housing (140) in such a manner that the receiving opening (11) is positioned on the end face of the gearwheel (107) disposed at least partially in the oil sump (150), the oil guiding direction (F) from the receiving opening (11) to the outlet opening (12) has at least one component running counter to gravity (G), and at least the first reservoir base (24) is disposed above the gearwheel (107).

12. Gearbox (100) according to Claim 11, characterized in that oil discharged by the gearwheel (107) from the oil sump (150) during operation makes its way into the receiving opening (11) and along the oil guiding direction (F) of the duct (2) to the outlet opening (12).

13. Gearbox according to Claim 11 or 12, characterized in that the first collection reservoir (13) is provided with at least one first drain (15) and the second collection reservoir (14) is provided with at least one second drain (16), wherein a drain opening (17) of the first drain (15) supplies a bearing of a first gearbox element, in particular the bearing (175) of an input-proximal rotor shaft (102) mounted in the gearbox (100) with oil, and a drain opening (18) of the second drain (16) supplies a bearing of a second gearbox element, in particular a bearing (176) of a pinion (106), with oil.