Transmission mechanism for a drive unit

Abstract

The invention relates to a transmission (10) for a drive unit of a vehicle, having a transmission housing (12) with a wall (14), wherein a bearing seat (16) for a rolling bearing (18) and / or a radial shaft sealing ring (20) is configured in the wall (14). It is proposed that a wiping rib (22) which protrudes from the wall (14) is configured on the wall (14), which extends along a central longitudinal axis (24), wherein the central longitudinal axis (24) of the wiping rib (22) intersects the bearing seat (16), and wherein one or more recesses (26) are configured in the wall (14) between the wiping rib (22) and the bearing seat (16), which extend between the wiping rib (22) and the bearing seat (16).

Description

Technical Field

[0001] This invention relates to a transmission mechanism for a drive unit of a vehicle. Background Technology

[0002] For example, this type of transmission mechanism is known from DE 10 2019 100 315 A1, which discloses a drive unit for a vehicle having an electric motor and a transmission mechanism. It includes an oil supply unit that supplies oil to the electric motor, the transmission mechanism, and an inverter for controlling the electric motor, wherein the oil is delivered using an oil pump. This results in high structural and economic costs.

[0003] DE 10 2012 202 453 B4 discloses a transmission mechanism with an oil guiding system, on which the oil contained is sprayed by an oil immersion wheel and collected on multiple oil guiding mechanisms. The oil guiding mechanisms result in relatively large positional requirements within the transmission mechanism. Summary of the Invention

[0004] The problem upon which this invention is based is solved by a transmission mechanism having the following characteristics.

[0005] According to the present invention, a transmission mechanism for a drive unit of a vehicle is provided, wherein the transmission mechanism has a transmission mechanism housing having a wall portion (housing wall portion) and a support (bearing support and / or sealing ring support) for a rolling bearing and / or a radial shaft sealing ring is constructed in the wall portion.

[0006] An ablation rib protruding from the wall portion is constructed therein, extending along a central longitudinal axis. The central longitudinal axis of the ablation rib (in its extension) intersects with a support for a rolling bearing and / or a radial shaft seal ring. Between the ablation rib and the support, one or more recesses are constructed in the wall portion, extending between the ablation rib and the support.

[0007] This allows for passive lubrication of transmission components, such as gears, but also of rolling bearings and radial shaft seals. Here, the lubricating substance, such as oil, distributed by the rotating components in the transmission mechanism is collected by scraping ribs and guided by one or more recesses to the support or the rolling bearings and / or radial shaft seals disposed therein. The scraping ribs reduce the distance between the wall and the transmission components, such as gears disposed on the shaft.

[0008] By selectively collecting and deflecting lubricating material through scraping ribs and recesses, and by closely guiding it along the gear housing when necessary, sufficient lubrication of the transmission components can be achieved with relatively little lubricant. There is no need for oil sump or pump, or separate gear sets for lubrication in different operating directions.

[0009] Cost savings can be achieved by reducing the number of oil pumps, oil volume, and manufacturing and assembly steps. Furthermore, structural space and materials or weight can be saved. Reduced oil volume minimizes turbulence losses. This improves efficiency and contributes to a structurally and cost-effective design for the transmission mechanism and the drive unit with it.

[0010] Rolling bearings can be used in the supports for rolling bearings and radial shaft seals, and radial shaft seals can also be used if necessary. The transmission mechanism may have other components. For example, the transmission mechanism may have a transmission shaft with teeth or applied gears constructed thereon. The transmission shaft can be guided through the rolling bearings and / or radial shaft seals. Thus, the transmission shaft is rotatably supported in the transmission housing and, if necessary, sealed.

[0011] According to one improvement, the recess can be configured as a gap extending from the scraping rib toward the support. This facilitates lubricant delivery. Therefore, the lubricant collected by the scraping rib is delivered toward the support via the gap. Undesirable entrainment of lubricant introduced into the gap in a single pass is largely avoided. By matching the gap in its depth and / or width, the delivery volume of the lubricant can be matched.

[0012] According to an improvement, the gap may have a depth (extending axially) at its support-facing end, said depth extending axially beyond the supports for the rolling bearing and the radial shaft seal ring by at least 50%, preferably completely. Therefore, the rolling bearing and the radial shaft seal ring can also be supplied with lubricant to a sufficient extent.

[0013] According to one improvement, the depth of the gap can be increased towards the support. This facilitates the conveying action towards the rolling bearing and the radial shaft seal ring. The conveying action can be enhanced, for example, by the capillary effect that occurs in the gap.

[0014] According to an improved design, a collecting rib can be constructed on each side of the wall at the support-facing end of the gap. The collecting ribs can be angled relative to each other. In other words, the collecting ribs can surround the gap and form either a V-shape or a funnel shape. Therefore, the collecting ribs function like a funnel. This facilitates the delivery of lubricating material to the support, as the collecting ribs can also collect lubricating material and deliver any that does not reach the gap to the support. The angle between the collecting ribs and the gap can vary depending on the flow of lubricating material or the application. The collecting ribs protrude from the wall.

[0015] According to an improved design, the collecting rib can transition into a support shoulder protruding from the wall of the support. This optimizes the stability of both the support shoulder and the collecting rib. Furthermore, it facilitates the conveying process, as lubricating material can be guided from the collecting rib to the support via the support shoulder. The support shoulder is a section of the support that extends axially from the wall.

[0016] According to an improved embodiment, the recess can be constructed as two recesses, wherein one recess is constructed in the wall portion on one side of the central longitudinal axis of the scraping rib, and the second recess is constructed in the wall portion on the other side of the central longitudinal axis of the scraping rib. The recesses also further guide the lubricating material collected by the scraping rib to the support.

[0017] According to one improvement, one or more recesses and / or collecting ribs can be arranged or constructed symmetrically, for example, axisily, about the central longitudinal axis of the scraping ribs. This contributes to uniform lubrication of the transmission mechanism, more precisely, it contributes to uniform lubrication of the transmission mechanism regardless of its direction of operation. The angle of the collecting ribs relative to the central longitudinal axis of the scraping ribs can be matched according to the flow of lubricating material or the application.

[0018] The problem upon which this invention is based is also solved by a drive unit for a vehicle having the transmission mechanism as described above. For the advantages thus achievable, please refer to the related statement concerning the transmission mechanism.

[0019] The drive unit may have other components. Therefore, the drive unit may have a motor coupled to and capable of driving the transmission mechanism. The motor may refer to an electric motor, thus forming an electric drive unit, such as an electric drive unit in the form of an electric shaft (E-axis).

[0020] The motor can also refer to a combustion motor, thus the drive unit constitutes a burner drive device. Similarly, it can be considered that the motor refers to a combination of an electric motor and a combustion motor. The drive unit would then constitute a hybrid drive device. Attached Figure Description

[0021] Possible embodiments of the present invention will now be explained with reference to the accompanying drawings. Wherein are shown:

[0022] Figure 1 A schematic partial view shows the transmission mechanism in the area of ​​the support for the rolling bearing and radial shaft seal ring;

[0023] Figure 2 Shown in partial view according to Figure 1 The direction of the line of sight observed from arrow B in the image. Figure 1 The situation of the transmission mechanism in the support area; and

[0024] Figure 3 A schematic partial view illustrates a possible design for the transmission mechanism in the area of ​​the support for the rolling bearing and the radial shaft seal ring. Detailed Implementation

[0025] exist Figure 1 and Figure 2 In the figure, the transmission mechanism of the drive unit for the vehicle is generally indicated by reference numeral 10.

[0026] The transmission mechanism 10 has a transmission mechanism housing 12 with a wall portion 14. A support 16 for a rolling bearing 18 and / or a radial shaft seal ring 20 is constructed within the wall portion 14. In this example, the rolling bearing 18 and the radial shaft seal ring 20 are inserted into the support 16 (see [link to documentation]). Figure 1 ).

[0027] A scraping rib 22 protruding from the wall portion 14 is constructed on the wall portion 14, the scraping rib extending along the central longitudinal axis 24 (see...). Figure 2 The central longitudinal axis 24 of the scraping rib 22 (on its extension) intersects with the support 16 for the rolling bearing 18 and / or the radial shaft seal ring 20. Between the scraping rib 22 and the support 16, a recess 26 is constructed in the wall, extending between the scraping rib 22 and the support 16.

[0028] The transmission mechanism 10 may have other components, such as a transmission mechanism shaft with teeth or an applied gear (not shown). The transmission mechanism shaft can be guided through the rolling bearing 18 and the radial shaft seal ring 20. Thus, the transmission mechanism shaft is rotatably supported in the transmission mechanism housing 12 and sealed (not shown).

[0029] In this example, the recess 26 is configured as a gap 28 that extends from the scraped rib 22 toward the support 16 (see [reference]). Figure 2 The lubricant, such as oil, collected by the scraping rib 22 can be delivered to the support 16 via the gap 28.

[0030] The gap 28 has a depth at its end 30 facing the support 16 extending along or parallel to the axial direction 32, the depth extending axially beyond the support 16 for the rolling bearing 18 and the radial shaft seal ring 20 by at least 50%, preferably completely (see...). Figure 1 The gap 28 increases toward the support 16 in terms of its depth (see...). Figure 1 ).

[0031] In this example, at the end 30 of the gap 28 facing the support 16, a collecting rib 34 and a collecting rib 36 are respectively constructed on the wall portion 14 on both sides of the gap 28. In this example, the collecting ribs 34 are angled relative to each other. In other words, the collecting ribs 34 and 36 can surround the gap 28 between them and form a V-shape or funnel shape. The collecting ribs 34 and 36 protrude from the wall portion 14.

[0032] The ribs 34 and 36 transition into the support shoulder 38 of the support 16, which protrudes from the wall portion 14. The support shoulder 38 is a section of the support 16 that extends axially from the wall portion 14.

[0033] In this example, the recess 26 or gap 28 and the collecting rib 34 are arranged or constructed symmetrically about the central longitudinal axis 24 of the scraping rib 22.

[0034] Figure 3 One possible design of the transmission mechanism 10 is shown. Identical or functionally identical elements are given the same reference numerals, thus avoiding repetition of the preceding statements.

[0035] Instead of the gap 28 and the collecting rib 34, two recesses 26 are provided here, which are constructed as two recesses 40 and 42. One of the recesses 40 is constructed in the wall portion 14 on one side of the central longitudinal axis 24 of the scraping rib 22. The second recess 42 is constructed in the wall portion 14 on the other side of the central longitudinal axis 24 of the scraping rib 22. The lubricating substance, such as oil, collected by the scraping rib 22 is further guided to the support 16 by means of the recesses 40 and 42.

[0036] The drive unit for a vehicle can have this transmission mechanism and can be constructed as described above.

Claims

1. A transmission mechanism (10) for a drive unit of a vehicle, comprising a transmission mechanism housing (12) with a wall portion (14), wherein, A support (16) for a rolling bearing (18) and / or a radial shaft seal ring (20) is constructed in the wall portion (14), characterized in that a scraping rib (22) protruding from the wall portion (14) is constructed on the wall portion (14), the scraping rib extending along a central longitudinal axis (24), wherein the central longitudinal axis (24) of the scraping rib (22) intersects the support (16), and wherein one or more recesses (26) are constructed in the wall portion (14) between the scraping rib (22) and the support (16), the recesses being in the scraping rib... Except for the rib (22) extending between the support (16), the recess (26) is constructed as a gap (28) extending from the scraping rib (22) toward the support (16). On the end (30) of the gap (28) facing the support (16), a collecting rib (34, 36) is constructed on the wall portion (14) on both sides of the gap (28), and the collecting rib (34, 36) transitions into the support shoulder (38) of the support (16) protruding from the wall portion (14).

2. The transmission mechanism (10) according to claim 1, characterized in that, The gap (28) has a depth at its end (30) facing the support (16), which extends axially by at least 50% beyond the support (16) for the rolling bearing (18) and the radial shaft seal ring (20).

3. The transmission mechanism (10) according to claim 2, characterized in that, The depth extends axially completely beyond the support (16) for the rolling bearing (18) and the radial shaft seal ring (20).

4. The transmission mechanism (10) according to claim 1 or 2, characterized in that, The gap (28) increases in depth toward the support (16).

5. The transmission mechanism (10) according to claim 1 or 2, characterized in that, The recess (26) is constructed as two recesses (40, 42), wherein one of the recesses (40) is constructed in the wall portion (14) on one side of the central longitudinal axis (24) of the scraping rib (22), and the second recess (42) is constructed on the other side of the central longitudinal axis (24) of the scraping rib (22).

6. The transmission mechanism (10) according to claim 1 or 2, characterized in that, The one or more recesses (26) and / or collecting ribs (34, 36) are arranged symmetrically about the central longitudinal axis (24) of the scraping ribs (22).

7. A drive unit for a vehicle having a transmission mechanism (10) according to any one of the preceding claims.

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