Oilway arrangement for a transmission housing

Abstract

An oil guidance arrangement for a transmission housing (1) of a vehicle includes at least one annular oil slinger (2) for collecting radially outward flowing oil. A guide area (3) for generating a laminar oil flow is closed in sections and is provided on a circumferential area of the oil slinger (2). A transmission housing (1) includes the oil guidance arrangement. The oil slinger (2) of the oil guidance arrangement is attached to a transmission housing-side centering plate (10) and surrounds a clutch (6). By rotation of the clutch (6), oil is guidable radially outward to the guide area (3) of the oil slinger (2).

Claims

1. An oil guidance arrangement for a transmission housing (1) of a vehicle, comprising at least one annular disk-shaped oil slinger (2) for collecting radially outward flowing oil, wherein the oil slinger (2) has a guide area (3) for generating a laminar oil flow, the guide area (3) closed in sections and having at least one inflow opening (4) and at least one outflow opening (5), the guide area (3) provided on a circumferential area of the oil slinger (2).

2. The oil guidance arrangement of claim 1, wherein the guide area (3) has a turbine blade geometry in a circumferential direction for oil guidance.

3. The oil guidance arrangement of claim 1, wherein the guide area (3) is configured such that a radially directed oil flow enters into the guide area (3) through the inflow opening (4), the oil in the guide area (3) is tangentially diverted by the guide area (3), and an axially aligned oil flow exits the guide area (3) through the outflow opening (5).

4. The oil guidance arrangement of claim 1, wherein the guide area (3) on the circumferential area of the oil slinger (2) extends along a circumferential angle of approximately thirty degrees.

5. The oil guidance arrangement of claim 1, wherein the oil slinger (2) comprises a plurality of attachment sections across the circumferential area, the plurality of attachment sections configured for attachment on the transmission housing (1) to mount the oil slinger (2) to the transmission housing (1).

6. The oil guidance arrangement of claim 1, wherein the oil slinger (2) defines a central recess (9), the central recess (9) configured for receipt of a shaft within the transmission housing (1).

7. A transmission housing, comprising the oil guidance arrangement of claim 1, wherein the oil slinger (2) of the oil guidance arrangement is attached to a transmission housing-side centering plate (10) and radially surrounds a clutch (6) such that rotation of the clutch (6) guides oil radially outward to the guide area (3) of the oil slinger (2).

8. The transmission housing of claim 7, wherein the inflow opening (4) of the guide area (3) of the oil slinger (2) is radially aligned with the clutch (6).

9. The transmission housing of claim 7, wherein the outflow opening (5) in the guide area (3) of the oil slinger (2) is directed axially towards an interior space of the transmission housing (1).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The present invention is explained in greater detail in the following with reference to the drawings. In the drawings:

(2) FIG. 1 shows a schematic top view of one possible variant embodiment of an oil guidance arrangement including an oil slinger for a transmission housing;

(3) FIG. 2 shows a schematic side view of the oil guidance arrangement;

(4) FIG. 3 shows a schematic rear view of the oil guidance arrangement;

(5) FIG. 4 shows an enlarged part view of the oil slinger including a guide area for the laminar oil flow guidance;

(6) FIG. 5 shows an axial section of a transmission housing according to example aspects of the invention, including an oil guidance arrangement and including a clutch filled with oil;

(7) FIG. 6 shows a longitudinal section of the transmission housing including the oil guidance arrangement and including oil flowing radially outward from the clutch;

(8) FIG. 7 shows one further axial section of the transmission housing including oil which is flowing into the guide area of the oil slinger due to the rotation of the clutch;

(9) FIG. 8 shows one further longitudinal section of the transmission housing including oil flowing axially out of the guide area of the oil slinger; and

(10) FIG. 9 shows one further axial section of the transmission housing including the outflow-side guide area of the oil slinger.

DETAILED DESCRIPTION

(11) Reference will now be made to embodiments of the invention, one or more examples of which are shown in the drawings. Each embodiment is provided by way of explanation of the invention, and not as a limitation of the invention. For example, features illustrated or described as part of one embodiment can be combined with another embodiment to yield still another embodiment. It is intended that the present invention include these and other modifications and variations to the embodiments described herein.

(12) In FIGS. 1 through 4, various views of an oil guidance arrangement according to example aspects of the invention are represented by way of example, while various views of a transmission housing 1 including the installed oil guidance arrangement are shown by way of example in FIGS. 5 through 9.

(13) The oil guidance arrangement according to the invention includes an approximately annular disk-shaped oil slinger 2 for collecting radially outward flowing oil. In order to avoid turbulence during the oil flow guidance, it is provided that a guide area 3 for generating a laminar oil flow, which is closed in sections or in part, is provided on the circumferential area of the oil slinger 2.

(14) The guide area 3 of the oil slinger 2 has a turbine blade geometry for laminar oil flow guidance which is indicated by way of example in FIG. 4 by flow arrows provided along the turbine blade geometry turning in the tangential direction between an inflow opening 4 and an outflow opening 5 of the guide area 3. The inflow opening 4 of the guide area 3 is utilized for the radially inflowing oil flow, while assigned to the outflow opening 5 of the guide area 3 is the axially outflowing oil flow for returning oil into an oil sump 12 of the transmission housing 1.

(15) A top view of the oil slinger 2 of the oil guidance arrangement is represented on the inflow side in FIG. 1, wherein an oil flow generated by way of a rotation of a component, such as a clutch 6, is represented, the oil flow being guided into the inflow opening 4 of the guide area 3. Multiple attachment sections are provided on the oil slinger 2 across the circumferential area, as bolt-on domes 7, for facilitating attachment on the transmission-housing side. In addition, multiple open spaces 8 are provided on the oil slinger 2, for example, for a pump drive gear or the like.

(16) In FIG. 2, a side view of the oil slinger 2 of the oil guidance arrangement is represented, by way of which a radial seal 13 of the transmission housing 1 is indicated. Furthermore, flow arrows for the oil flow guided along the guide area 3 are indicated.

(17) A back view of the oil slinger 2 of the oil guidance arrangement is represented in FIG. 3. The outflow opening 5 of the guide area 3 having the turbine blade geometry is indicated in this view. The oil flow emerges axially from the plane of the drawing, from the outflow opening 5 or the outlet of the guide area 3, which is indicated by a circle in FIG. 3. In addition, further open spaces 8A for constrictions forming on the oil slinger 2 are indicated. Furthermore, a central recess 9 is provided in the oil slinger 2 for the passage of a shaft extending in the transmission housing 1.

(18) A partial view of the oil slinger 2 including the guide area 3 is shown in detail in FIG. 4. The indicated flow arrows clearly show that the oil flow enters the inflow opening 4 initially directed radially and is tangentially aligned in the circumferential direction along the guide area 3 due to the turbine blade geometry turning in the circumferential direction, in order to finally flow out of the outflow opening 5 of the guide area 3 as an axial oil flow. As a result, it is ensured that a nearly laminar oil flow is ensured, and so turbulence is avoided to the greatest extent possible.

(19) An example of an installation of the oil guidance arrangement according to example aspects of the invention in the transmission housing 1 is represented in FIGS. 5 through 9. The oil slinger 2 of the oil guidance arrangement is attached to a centering plate 10 of a clutch bell housing 11 of the transmission housing 1 and surrounds the clutch 6 which is rotatably mounted in the clutch bell housing 11 and can be designed, for example, as a dual clutch. Due to the rotation of the clutch 6, the oil provided in the interior of the clutch 6 is conveyed radially outward to the circumferential area of the oil slinger 2 into the guide area 3, which is indicated by corresponding flow arrows in FIGS. 5 and 6.

(20) FIG. 7 shows one further axial section of the transmission housing 1 including the installed oil slinger 2. Due to the rotation of the clutch 6, the oil is conveyed from a gap between the clutch 6 and the oil slinger 2 toward the inflow opening 4 of the guide area 3 of the oil slinger 2.

(21) Thereafter, the oil is conveyed in the axial direction via the turbine blade-shaped outflow opening 5 in the guide area 3 outward into the interior space of the transmission housing 1 without foaming up. This is indicated by way of a corresponding flow arrow in the longitudinal section of the transmission housing 1 represented in FIG. 8.

(22) FIG. 9 shows one further axial section of the transmission housing 1 on the outflow side of the oil slinger 2, including the oil flow flowing axially out of the guide area 3 of the oil slinger 2, which is indicated in FIG. 9 by a circle in the area of the outflow opening 5. The oil emerging from the outflow opening 5 runs downward between the clutch bell housing 11 and the centering plate 10 along the longest possible path in order to stabilize the oil to the greatest extent possible before the oil enters the oil sump 12 of the transmission housing 1 and is scavenged of circulated again by the oil pump.

(23) Modifications and variations can be made to the embodiments illustrated or described herein without departing from the scope and spirit of the invention as set forth in the appended claims.

REFERENCE CHARACTERS

(24) 1 transmission housing 2 oil slinger 3 guide area 4 inflow opening 5 outflow opening 6 clutch 7 bolt-on dome 8, 8A open space 9 central recess 10 centering plate 11 clutch bell housing 12 oil sump 13 radial seal