Oil guide channel section for installation in a gearbox

Description

State of the art

[0001] In current technology, transmissions for motor vehicles are used particularly in combination with an electric motor drive. As with conventional transmissions, the transmission components must be lubricated with oil. To increase transmission efficiency and reduce costs, the oil pump often used in conventional transmissions for lubrication can be omitted. Lubrication and cooling of the transmission components are preferably achieved through passive oil distribution. Lubrication of the rotating transmission components is crucial for transmission reliability. Insufficient lubrication can lead to an inadequate supply of oil to the bearings of the transmission components and the sealing rings. This can result in increased wear and even transmission component failure.

[0002] From DE 10 2017 108 748 B3, an oil guide channel component for installation in a motor vehicle transmission is known. The illustrated transmission has a transmission housing and at least one gear arranged in the transmission housing, which is at least partially submerged in an oil sump of the transmission. The rotating gear rolls through the oil sump with a section of its surface, thereby absorbing oil. This process is often described in technical terms as splashing. To distribute the oil absorbed by the gear more precisely within the transmission, a spectacle-shaped oil guide channel component is used, which can be inserted into the transmission as an insert. The oil guide channel component has several baffles and a guide channel with an intake opening and an outlet opening, wherein the guide channel has an oil flow direction from the intake opening to the outlet opening and a channel wall that is closed around its perpendicular to the oil flow direction.In DE 10 2017 108 748 B3, the channel wall is formed by a semi-circular hollow body curved around the axis of a gear of the transmission. In a predetermined installation state of the oil guide channel section, this hollow body is located predominantly above the oil sump level of the transmission. The curved guide channel has a receiving opening designed as a catch mouth for receiving oil. This oil is thrown up by another gear, which meshes with the gear surrounded by the semi-circular hollow body, and transported by the second gear to the catch mouth. In DE 10 2017 108 748 B3, an end section of the semi-circular hollow body, facing away from the catch mouth and closed except for a throttle bore, forms an oil collection area for accumulating the oil conveyed through the guide channel.The throttle bore forms the only outlet of the guide channel and therefore simultaneously serves as a drain for the oil from the at least one oil collection area. The throttle bore is located vertically above the meshing area of ​​the two gear teeth, so that the outflowing oil flows into their meshing area and wets the contact surfaces of the teeth.

[0003] A generic oil guide channel component 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 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 from the receiving opening to the outlet opening has an oil guide direction and a channel wall closed all around perpendicular to the oil guide direction, wherein the oil guide channel part further has at least one oil collection area for accumulating 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.The at least one oil collection area comprises a first collecting basin, wherein the first collecting basin has a first basin wall and a first basin floor, wherein the guide channel adjoins the basin wall of the first collecting basin such that, viewed in the oil flow direction of the guide channel, the first basin floor is arranged between the intake opening and the outlet opening. According to the invention, the guide channel is designed to be straight from the intake opening to the outlet opening.

[0005] In the context of this application, "oil" is understood to mean a transmission-compatible liquid lubricant, irrespective of whether it is marketed commercially as oil. In particular, it may be a lubricant designated as ATF (Automatic Transmission Fluid) or similar substances.

[0006] A predetermined installation state, which defines an orientation of the oil guide channel section in the gearbox relative to gravity, is understood to be an installation state that represents a specific orientation of the oil guide channel section relative to the gearbox housing, given a known orientation of the associated gearbox relative to the Earth's gravitational field. The orientation of the gearbox relative to the Earth's gravitational field is generally known for a normal position of the gearbox, where the normal position is the position in which the gearbox is oriented relative to gravity during its intended use. If the gearbox is a motor vehicle gearbox, it assumes a specific orientation relative to the Earth's gravity when the motor vehicle is horizontally oriented relative to the Earth's gravitational field in its normal position. This applies regardless of whether the motor vehicle is actually moving horizontally relative to the Earth's gravitational field or is traveling uphill at an angle of inclination.Based on the known installation position of the transmission in the vehicle, it is generally possible to deduce how an oil guide channel component should be installed in the transmission so that the oil guide channel component assumes a specific orientation relative to gravity in its normal position. Since, in most possible driving conditions, the angle of inclination during downhill or uphill driving deviates only very moderately from the horizontal by + / - 20°, the geometric design of the oil guide channel component is adapted to a horizontal vehicle position.

[0007] An oil guide channel component is a component that has at least one guide channel for oil transport. The oil guide channel component can be designed to distribute the supplied oil within the oil guide channel component under the influence of gravity. The oil guide channel component can be designed, in particular, as an insert that is placed into the gearbox during assembly. The oil guide channel component can be made of plastic, metal, or a plastic-metal composite. The oil guide channel component can be constructed as a single piece or in multiple parts. In particular, it is possible to assemble the oil guide channel component from two or more shell parts that are mechanically connected to each other via snap-fit ​​or clip connections.

[0008] In the context of the present application, the terms "below" or "underneath" refer to a position at a point lower in the direction of gravity relative to an assumed reference point, and the terms "above" or "above" refer to a position at a point higher in the direction of gravity, assuming an orientation of the oil guide channel part corresponding to the predetermined installation state.

[0009] The term "oil sump" refers to a region within the gearbox housing where oil accumulates under the influence of gravity. A gear that is at least partially submerged in the oil sump is defined as a gear whose lower portion, in the direction of gravity, is immersed in the sump, while its upper portion protrudes above it. As the gear rotates, it draws oil from the sump and transports it against gravity to a point of separation or discharge. This process is known as "splashing." The oil circulation and flow rate through the gear depend directly on the rotational speed and, via the viscosity, also on the temperature. The amount of oil carried away from the sump by the gear causes the oil level in the sump to drop during operation.The gear can therefore be considered an oil-carrying gear. Oil splashed from the gear and, if applicable, other gears during rapid rotation within the gearbox housing can reach points where rapid return to the oil sump is not possible. These oil losses are known as churning losses. To ensure that sufficient oil is still delivered by the gear and the gearbox does not run dry, the oil sump must contain a corresponding amount of oil. On the other hand, an excessively high oil level in the sump is undesirable, as this increases detrimental drag losses within the gearbox. As a compromise, it is therefore desirable to direct the oil carried away by the gear as precisely as possible to the lubrication points within the gearbox to avoid churning losses and to lower the oil level in the sump to a level where gearbox drag losses are minimized.This is achieved through the oil guide channel section. Advantages of the invention

[0010] The oil guide channel according to the invention enables a more targeted oil supply to bearings of rotating gear elements within a gear housing. This is achieved by the formation of a first collecting basin, which has a first basin wall and a first basin floor, in combination with a specially designed guide channel, wherein the guide channel adjoins the basin wall of the first collecting basin in such a way that the first basin floor, viewed in the oil flow direction of the guide channel, is arranged between the receiving opening and the outlet opening of the guide channel.The oil guide channel section is particularly advantageously designed for installation in a gearbox in a predetermined installation state, which defines an orientation of the oil guide channel section relative to gravity, wherein in an orientation corresponding to the predetermined installation state, the first basin floor is aligned approximately perpendicular to gravity and the oil flow direction from the receiving opening to the outlet opening runs against gravity. The oil guide channel section according to the invention can, in particular, be installed in a gearbox such that, in the predetermined installation state, the receiving opening of the guide channel can be positioned on the end face of a gear of the gearbox and the first basin floor can be positioned above the gear.Oil drawn into the guide channel through the intake opening can be transported against gravity to the outlet opening, with oil exiting the outlet opening collecting in the first reservoir. The straight design of the guide channel allows for the unimpeded transport of the oil supplied to the guide channel towards the outlet opening. In a gearbox, the straight guide channel can be oriented, in particular, so that it runs tangentially to the end face of a gear in the predetermined installation state. The intake opening of the guide channel can, for example, be designed as a jaw opening, with the circumferential edge of the intake opening beveled according to the tangential angle of the guide channel, thus achieving the closest possible proximity of the intake opening to the end face of the gear.The contour of the surrounding edge can be adapted to the radius of curvature of the face of a gear. In an orientation of the oil guide channel section that corresponds to the predetermined installation state, oil exiting the outlet opening of the guide channel flows in the direction of gravity and collects in the first collection basin, which is thereby filled.

[0011] In contrast to prior art solutions where the oil collection area forms the end region of a semi-circular hollow body curved around a gear axis, the oil collection area in the present invention comprises a first collection basin that can be arranged above the oil-carrying gear. The oil accumulating in the first collection basin causes the oil sump at the bottom of the gearbox housing to sink during operation. The guide channel is designed as a simple, circumferentially closed channel that can preferably extend in a straight line from the intake opening to an outlet opening. The cross-sectional area of ​​the intake opening can correspond to the cross-sectional area of ​​the outlet opening. The guide channel with its circumferential channel wall is integrated into the oil guide channel section.

[0012] Unlike the prior art, the oil guide channel section is designed so that the oil does not accumulate in the guide channel, but rather outside the guide channel in the first collection basin. This advantageously ensures sufficient lubrication of the gearbox bearings even with speed fluctuations, as the supply contained in the first collection basin can initially be used to lubricate the points during operation. At least one drain, but preferably several, can be provided on the first collection basin to supply oil to different bearings in the gearbox. Compared to the prior art, the amount of oil conveyed through the guide channel during operation can be advantageously designed to be independent of the amount of oil draining from the oil collection area via a drain.The guide channel serves only to fill the first collection basin, while the outflow of oil from the first collection basin can be controlled by the geometric design of the basin and the geometric design of at least one outlet from the basin. The oil supply to the bearings of the gear elements can therefore be advantageously optimized both spatially and with regard to timing. This results in improved lubrication of the bearings, particularly in gearboxes where rotating gear elements are arranged one above the other in several planes relative to gravity.

[0013] Since the first collection basin can be advantageously used as an intermediate storage tank, even after short deactivation periods of the electric motor driving the gearbox, faster lubrication is available upon reactivation of the electric motor. During longer periods of inactivity, however, the first collection basin can also empty completely into the oil sump via a small drain opening in its base.

[0014] Advantageous embodiments and further developments of the invention are enabled by the features specified in the dependent claims. Advantageously, an end of the channel wall of the guide channel facing away from the receiving opening can form a circumferential wall projecting beyond the first basin floor of the first collecting basin and defining the outlet opening, such that oil exiting the outlet opening of the guide channel collects in the first collecting basin by flowing in the direction of gravity. Oil flowing over the circumferential wall can thus advantageously flow directly into the first collecting basin and fill it.

[0015] The oil collection area of ​​the oil channel section can further include, for example, a second collection basin, wherein the second collection basin has a second basin wall and a second basin floor, and wherein the second collection basin is connected to the first collection basin via a connecting channel.

[0016] The first and second collection basins can advantageously be equipped with drains. For example, a first drain can project from the first basin wall above the bottom of the first basin in the predetermined installation direction. Similarly, a second drain can project from the second basin wall above the bottom of the second collection basin in the predetermined installation direction. Furthermore, a third drain can project from the first basin wall opposite the first drain in the predetermined installation direction above the bottom of the first basin. The first, second, and / or third drains can supply different bearings in a gearbox with lubricating oil. The oil supply to the bearings is advantageously "passive," meaning the oil drains through the respective drains.

[0017] Advantageously, the edge of the surrounding wall of the guide channel can be positioned at a smaller distance from the bottom of the first collection basin on the side facing the first basin than the distance between the edge of the surrounding wall and the bottom of the second basin on the side facing the second collection basin. Oil fed into the oil collection area via the guide channel first enters the first collection basin and at least partially fills it before flowing through the connecting channel into the second collection basin. This optionally prevents premature oil flow towards a second outlet on the first collection basin and ensures that the first outlet on the first collection basin is supplied with oil first.In a certain sense, therefore, in this embodiment, the oil flows through the first and second outlets in a cascade-like manner, with the first collection basin being filled first until oil flows out of the oil guide channel section via the first outlet, and simultaneously, shortly before or a short time later, the supplied oil begins to fill the second collection basin via the connecting channel, so that in this example, oil only flows out via the second outlet after it has already flowed out via the first outlet.

[0018] Of course, additional collection basins can also be provided on the oil guide channel section and / or additional drains on the first or second collection basin, with which further bearings of rotating gear elements can be lubricated with oil.

[0019] The oil guide channel part can advantageously have several retaining cams projecting from the oil guide channel part, preferably on opposite sides of the oil guide channel part, by means of which the oil guide channel part can be inserted into a gearbox in a predetermined installation state. Brief description of the drawings

[0020] Possible embodiments of the invention are explained below with reference to the accompanying drawing. The drawing shows: Fig. 1 shows a cross-section through a transmission of a motor vehicle driven by an electric machine, for illustrative purposes; 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 top view of the oil guide channel part made of Fig. 2 , Fig. 4 another perspective view of the oil guide channel part made of Fig. 2 and Fig. 3 , Fig. 5 an enlarged detail view from Fig. 6 , Fig. 6 a cross-section through a gearbox with gearbox housing, which corresponds to the illustration of the Fig. 1 corresponds to an oil guide channel section inserted therein in a predetermined installation state, as described in the Figures 1 to 4 was depicted. Embodiments of the invention

[0021] Fig. 1 Figure 1 shows a drive device for a motor vehicle, comprising a gearbox 100. The description of the gearbox serves to illustrate the possible applications of an oil guide channel component, as described further below.

[0022] The gearbox 100 is connected at its input to an electric machine 110, which has a rotor shaft 103. The rotor shaft 103 meshes with a gear 104, which is rotationally fixed to a drive shaft 101 of the gearbox. The drive shaft 101 is supported around its outer circumference at two axially spaced bearing points 171 and 172 in a (in Fig. 1(not shown) gearbox housing rotatably mounted.

[0023] Furthermore, the transmission 100 comprises a clutch assembly 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 on a clutch element 121 via a spindle drive and a shift fork 129. The clutch element 121 is mounted axially displaceably on a guide hub 105. The clutch element 121 is, for example, ring-shaped and can rotate relative to the shift fork 129. The clutch element 121 can have internal teeth that engage with external teeth on the guide hub 105, so that the clutch element 121 is displaceable on the guide hub 105 parallel to the axis of the drive shaft 101. The guide hub 105 and the clutch element 121 engaged with it are mounted non-rotatably on the drive shaft 101. Furthermore, a coupling element 122 is provided, which is rotationally fixed 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 axially via the shift fork until the internal teeth of the coupling element 121 engage with the external teeth of the coupling element 122, thereby locking the coupling element 121 to the coupling element 122. Through the coupling, the gear 104, the drive shaft 101, the guide hub 105, the coupling element 121, the coupling element 122 and the pinion 106 rotate as a block around the axis of the drive shaft 101. Upon decoupling, the coupling element 121 is moved away from the coupling element 122 by means of the rotary actuator 123. Fig. 1Pulled to the left, the coupling between the pinion 106 and the drive shaft 101 is released. The pinion 106 can now rotate around the drive shaft 101.

[0024] The pinion 106 meshes with a gear 107. The gear 107 is rotationally fixed 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 driven by the differential 130. The gear 107 is rigidly connected to the differential cage 108 of the differential 130. As shown in Fig. 7, the differential 130 can be integrated into the gearbox housing 140 of the gearbox 100.

[0025] As previously described, in the decoupled state, the coupling between the pinion 106 and the drive shaft 101 is released by means of the clutch device 120. If, for example, the electric motor is switched off while a vehicle is in motion, the rotor shaft 103 and the drive shaft 101 are no longer driven. The wheels of the still-rolling vehicle now drive the transmission gear 107 via the output shaft 102, which meshes with the pinion 106, causing the pinion 106 to rotate around the drive shaft 101. Even in this state, it must be ensured that, for example, the bearing 176 of the pinion 106, located above the oil sump of the transmission 100, is adequately supplied with oil.

[0026] Fig. 2, Fig. 3 and Fig. 4 show an embodiment of an oil guide channel part 1 according to the invention, which can, for example, be designed to be used in the following ways: Fig. 1The oil guide channel part 1 is to be installed in the illustrated gearbox 100. As shown here, it can be designed as an insert that is placed into the gearbox 100 during assembly. The oil guide channel part 1 can be made of plastic, metal, or a plastic-metal composite and can be constructed in one piece or in multiple parts. In particular, it is possible to assemble the oil guide channel part from two or more shell parts, which are mechanically connected to each other via snap-fit ​​or clip connections.

[0027] The oil guide channel part 1 has a guide channel 2 with a receiving opening 11 and with an outlet opening 12, wherein the guide channel 2 has an oil flow direction F from the receiving opening 11 to the outlet opening 12 (shown in Fig. 5) and has a channel wall 21 that is closed all around perpendicular to the oil flow direction F. The oil guide channel section 1 further has an oil collection area 13a for accumulating oil conveyed through the guide channel 2 and an outlet 15a for oil from the oil collection area 13a. The oil collection area 13a comprises a first collection basin 13. The first collection basin 13 has a first basin wall 25 and a first basin floor 24. An end of the channel wall 21 facing away from the receiving opening 11 of the guide channel 2 forms a circumferential wall 21a that projects beyond the first basin floor 24 of the first collection basin 13 and delimits the outlet opening 12, as shown in Fig. 2, Fig. 3 and especially in Fig. 5This is clearly visible. The oil channel section 1 also has a first drain 15, which projects from the first basin wall 25 above the first basin floor 24 and has a drain opening 17. The first drain 15 is designed as an angled channel. Additionally, a further drain 19 can be formed at the upper edge of the first basin wall 25, which functions as an overflow. The first collection basin 13 can have a small drain opening 20 in the first basin floor 24, designed as a bore, through which the first collection basin 13 can empty itself during extended periods of inactivity. The diameter of the drain opening 20 is designed to be so small that the amount of oil flowing out through the drain opening 20 during operation is significantly less than the amount of oil supplied to the guide channel 2.

[0028] As further in Fig. 2, Fig. 3 and Fig. 4As shown, the oil collection area 13a of the oil guide channel section 1 comprises a second collection basin 14, wherein the second collection basin 14 has a second basin wall 27 and a second basin floor 26. As shown in Fig. 3 As can be seen, the second collection basin 14 is connected by a connecting channel 29 ( Fig. 3 ) with the first collection basin 13. A second outlet 16 projects above the second basin floor 26 from the second basin wall 27 of the second collection basin 14 and has an outlet opening 18. The second outlet 16 can also be channel-shaped. In addition, the second outlet 16 can, for example, have a further outlet opening 18a, which is angled away from the outlet 16.

[0029] The edge of the circumferential wall 21a preferably has a distance from the first basin floor 24 on a side facing the first collecting basin 13, which is smaller than the distance of the edge of the circumferential wall 21a from the second basin floor 26 on a side facing the second collecting basin 14.

[0030] The in the Figures 2 to 4 The illustrated oil guide channel section 1 is designed to be arranged in the gearbox housing 140 of a gearbox in a predetermined installation state, which defines an orientation of the oil guide channel section relative to gravity G. However, without being limited thereto, the oil guide channel section 1 is preferably intended to flow into the housing 140 of a gearbox. Fig. 1The illustrated gearbox 100 is used for this purpose. For this purpose, the oil guide channel part 1 has retaining cams 23 projecting from its sides, with which the oil guide channel part 1 can be installed and anchored in a gearbox housing 140 of the gearbox 100 in a predetermined orientation relative to the normal position of the gearbox 100. As shown in Fig. 2 As can still be seen, the oil guide channel part 1 can be provided with reinforcing ribs 22 to increase stability.

[0031] Fig. 6 and the enlarged detail view of the Fig. 5 show a gearbox 100, whose basic design is the same as in the Fig. 1 The gearbox shown corresponds to the oil guide channel part 1 installed therein. Figs. 2 to 4It can be seen that the receiving opening 11 of the guide channel 2 can be positioned on the end face of the gear 107 and in the immediate vicinity of the end face of the gear 107, while the first basin bottom 24 of the first collecting basin 13 can be arranged above the gear 107. The oil flow direction F therefore runs from the receiving opening 11 to the outlet opening 12 against the force of gravity G, the orientation of which is determined for the normal position of the gearbox 100 in Fig. 6 is shown.

[0032] As in the Figures 5 and 6As shown, the guide channel 2 is preferably straight and, at least in the area of ​​the gear 107, preferably runs tangentially to an end face of the gear 107. The receiving opening 11 can be designed as a jaw, wherein the circumferential edge of the receiving opening 11 can be chamfered 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 107. The contour of the circumferential edge can be adapted to the radius of curvature of the end face of the gear 107, as shown.

[0033] The gear 107 of the gearbox 100 is partially located in an oil sump 150. The gear 107 draws oil from the oil sump 150 and transports it to the receiving opening 11 of the guide channel 2. The momentum of the oil pushes it in the guide channel 2 in the oil flow direction F to the outlet opening 12.

[0034] How best to Fig. 5As can be seen, in the predetermined installation state of the oil guide channel section 1, the oil exiting from the outlet opening 12 of the guide channel 2 during operation flows over the circumferential wall 21a in the direction of gravity G and thus towards the first collection basin 13, where it accumulates. Since the edge of the circumferential wall 21a on the side facing the first collection basin 13 is a smaller distance from the first basin floor 24 than the distance of the edge of the circumferential wall 21a from the second basin floor 26 on the side facing the second collection basin 14, the oil initially flows over the edge of the circumferential wall 21a on the side facing the first collection basin 12, thus filling it first. As soon as the oil reaches the connecting channel 29, the second collection basin 14 also fills with oil via this channel.The rising oil level in the first collection basin 13 and the second collection basin 14 reaches the first outlet 15 and the second outlet 16 after a short time and flows out of the oil guide channel part 1 under the influence of gravity G via the first outlet opening 17 and the second outlet opening 18 and third outlet opening 18a.

[0035] The oil flowing from the oil guide channel section 1 via the first drain 15 and the second drain 18 can be directed to different bearings of gear elements in the gearbox 100, which may be spatially separated. For example, the first drain 15 can be used to supply the bearing 176 of the pinion 16 in Fig. 1 to supply with oil, while the second process 16 supplies the bearing of a rotor shaft 103 with oil.

[0036] However, the oil guide channel part 1 can also be configured differently than in Figs. 2 to 4The structure shown is as follows. It is understood that, by means of at least one initial collection basin and the branching outlets and / or connecting channels to further collection basins, an optimal supply of lubricating oil to the bearings of rotating gear elements can be optimally adapted, even for differently constructed gearboxes.

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), wherein the first collection reservoir (13) has a first reservoir wall (25) and a first reservoir base (24), wherein the duct (2) is contiguous to the first reservoir wall (25) of the first collection reservoir (13) 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), characterized in that the duct (2) is designed to be rectilinear from the receiving opening (11) to the outlet opening (12).

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) is aligned approximately perpendicularly to gravity (G), and the oil guiding direction (F) from the receiving opening (11) and up to the outlet opening (12) runs 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 (11) forms an encircling wall (21a) projecting beyond the first reservoir base (24) 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 oil collection region (13a) of the oil duct part (1) comprises a second collection reservoir (14), wherein the second collection reservoir (14) has a second reservoir wall (27) and a second reservoir base (26), wherein the second collection reservoir (14) is connected to the first collection reservoir (13) by way of a connecting duct (29).

5. Oil duct part (1) according to Claims 3 and 4, characterized in that the periphery of the encircling wall (21a) on a side facing the first collection reservoir (13) has a spacing from the first reservoir base (24) that is less than the spacing of the periphery of the encircling wall (21a) from the second reservoir base (26) on a side facing the second collection reservoir (14).

6. Oil duct part according to one of the preceding claims, characterized in that a first drain (15), in the predetermined installation direction above the first reservoir base (24), protrudes from the first reservoir wall (25).

7. Oil duct part according to Claim 4, characterized in that a second drain (16), in the predetermined installation direction above the second reservoir base (26), protrudes from the second reservoir wall (27) of the second collection reservoir (14).

8. Oil duct part (1) according to any one of the preceding claims, characterized in that a third drain (19) in the predetermined installation direction above the first reservoir base (26), on a side opposite the first drain (15), protrudes from the first reservoir wall (25) of the first collection reservoir (13).

9. Oil duct part (1) according to one of the preceding claims, characterized in that the oil duct part (1), preferably on mutually opposite sides of the oil duct part (1), has a plurality of retaining cams (23) which protrude from the oil duct part (1) and by way of which the oil duct part (1) is able to be assembled in the predetermined installation state in the gearbox (100).

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.