TRANSMISSION DEVICE AND OIL GUIDANCE STRUCTURE PROVIDED THEREIN

• US 20200132183A1
• Filed: 02/19/2018
• Published: 04/30/2020
• Est. Priority Date: 04/25/2017
• Status: Active Grant

• Current Assignee: Schaeffler Technologies AG & Co.KG (INA-Holding Schaeffler GmbH & Co. KG)
• Original Assignee: Schaeffler Technologies AG & Co.KG (INA-Holding Schaeffler GmbH & Co. KG)
• Inventors: GUNNEL, Ronny, GREIN, Andreas, KALMAR, Zoltan, WURZBERGER, Philip, DORRIE, Swen
• Granted Patent: US 11,105,410 B2
• Time in Patent Office: Days
• CPC Class Codes: B60K 1/00 Arrangement or mounting of electrical propulsion units B60K7/00 takes precedence; arrangement or mounting of plural diverse prime-movers for mutual or common propulsion B60K6/00; electric transmission arrangements B60K17/12; electric equipment or propulsion of electrically-propelled vehicles per se B60L; current-collectors for power supply lines of electrically-propelled vehicles B60L5/00
• CPC Class Codes: B60K 2001/001 one motor mounted on a propulsion axle for rotating right and left wheels of this axle
• CPC Class Codes: F16H 37/04 Combinations of toothed gearings only F16H37/06 takes precedence
• CPC Class Codes: F16H 57/037 Gearboxes for accommodating differential gearings rotating cases for differential gearings F16H48/40
• CPC Class Codes: F16H 57/0409 characterised by the problem to increase efficiency, e.g. by reducing splash losses
• CPC Class Codes: F16H 57/0423 Lubricant guiding means mounted or supported on the casing, e.g. shields or baffles for collecting lubricant, tubes or pipes means for guiding lubricant into an axial channel of a shaft F16H57/0426; lubrication by injection, injection nozzles or tubes therefore F16H57/0456
• CPC Class Codes: F16H 57/045 Lubricant storage reservoirs, e.g. reservoirs in addition to a gear sump for collecting lubricant in the upper part of a gear case
• CPC Class Codes: F16H 57/0453 Section walls to divide a gear sump
• CPC Class Codes: F16H 57/0471 Bearing
• CPC Class Codes: F16H 57/0483 Axle or inter-axle differentials
• CPC Class Codes: F16H 57/0493 Gearings with spur or bevel gears differentials with spur or bevel gears F16H57/0483
• CPC Class Codes: F16H 57/0495 with fixed gear ratio

Abstract

A transmission device is provided having a transmission housing, a gear set received in the transmission device having a first gear wheel, which is rotatable about a first gear wheel axis, and a second gear wheel, which engages the first gear wheel and is rotatable abut a second gear wheel axis. In a lateral region of the first gear wheel, there is an oil guidance structure, which is designed as a component produced separately from the transmission housing, and comprises an orifice segment extending radially to the first gear wheel axis, and extends at least in part about the first transmission axis and forms a first lateral surface facing the gear wheel, leaving an intermediate space.

Claims

1. A transmission device comprising:

a transmission housing which has a bottom region and a first and second side wall region,

a gear set accommodated in the transmission housing and having a first gearwheel which is rotatable about a first gearwheel axis, and

a second gearwheel which engages the first gearwheel and is rotatable about a second gearwheel axis, which extends parallel to the first gearwheel axis,

wherein,

in a side region of the first gearwheel, there is an oil guidance structure, which is formed as a component produced separately from the transmission housing,

the oil guidance structure comprises a first orifice segment, which extends at least partially around the first gearwheel axis and, in doing so, forms a first side face facing the first gearwheel,

the first orifice segment is bounded by an inner rim and an outer rim,

a distance between the inner rim of the first orifice segment and the first gearwheel axis is smaller than a radius of an inner diameter of the first gearwheel, and

the oil guidance structure is arranged in such a way that an intermediate space remains between the first gearwheel and the first side face of the first orifice segment, said first side face facing the first gearwheel.

2. The transmission device as claimed in claim 1, wherein the first side face of the orifice segment comprises a conical or funnel-shaped surface which is aligned radially with respect to the first gearwheel axis.

3. The transmission device as claimed in claim 1, wherein the distance between the outer rim of the first orifice segment and the first axis is greater than the inner circle of the first gearwheel, and in that a contour of the outer rim of the first orifice segment is of complementary design to an inner contour of the adjacent bottom region.

4. The transmission device as claimed in claim 1, wherein the first orifice segment extends around the first gearwheel axis in the manner of a continuous flat annular disk.

5. The transmission device as claimed in claim 1, wherein the first orifice segment is adjoined by a second orifice segment which extends around the second gearwheel axis in the manner of a continuous ring.

6. The transmission device as claimed in claim 5, wherein the second orifice segment carries a half shell section which extends from the second orifice segment in a direction of the second gearwheel axis and which bounds a tip circle of the second gearwheel while leaving an intermediate space.

7. The transmission device as claimed in claim 6, wherein the half shell section forms an inner wall of a semi-arcuate hollow body curved in the manner of a semi-arc around the second gearwheel axis.

8. The transmission device as claimed in claim 1, wherein the first orifice segment forms an inner collar, which extends in a direction away from the first gearwheel toward a bearing device, which supports a transmission component carrying the first gearwheel.

9. The transmission device as claimed in claim 1, wherein the first gearwheel fits around an axle differential, wherein this axle differential is a spur gear differential.

10. The transmission device as claimed in claim 1, wherein the oil guidance structure is arranged in an intermediate region between the first gearwheel and the first side wall region of the transmission housing.

11. A transmission device comprising:

a transmission housing having a bottom region, a first side wall region, and a second side wall region;

a gear set in the transmission housing having

a first gearwheel which is rotatable about a first axis and has a center hole having a radius, and

a second gearwheel engaging the first gearwheel and rotatable about a second axis; and

an oil guide having an orifice segment, which extends at least partially around the first axis and includes a first side face facing the first gearwheel and spaced from the first gearwheel by an intermediate space, the orifice segment having an inner rim circumscribing the first axis and an outer rim, wherein a distance between the inner rim and the first axis is smaller than the radius of the center hole of the first gearwheel.

12. The transmission device as claimed in claim 11, wherein the first side face of the orifice segment comprises a conical or funnel-shaped surface which is aligned radially with respect to the first axis.

13. The transmission device as claimed in claim 11, wherein the distance between the outer rim of the orifice segment and the first axis is greater than the center hole of the first gearwheel, and in that a contour of the outer rim of the orifice segment is of complementary design to an inner contour of the adjacent bottom region.

14. The transmission device as claimed in claim 11, wherein the orifice segment extends around the first axis in the manner of a continuous flat annular disk.

15. The transmission device as claimed in claim 11, wherein the orifice segment is adjoined by a second orifice segment which extends around the second axis in the manner of a continuous ring.

16. The transmission device as claimed in claim 15, wherein the second orifice segment carries a half shell section which extends from the second orifice segment in a direction of the second axis and which bounds a tip circle of the second gearwheel while leaving an intermediate space.

17. The transmission device as claimed in claim 16, wherein the half shell section forms an inner wall of a semi-arcuate hollow body curved in the manner of a semi-arc around the second axis.

18. The transmission device as claimed in claim 11, wherein the orifice segment forms an inner collar, which extends in a direction away from the first gearwheel toward a bearing device, which supports a transmission component carrying the first gearwheel.

19. The transmission device as claimed in claim 11, wherein the first gearwheel fits around an axle differential, wherein this axle differential is a spur gear differential.

20. The transmission device as claimed in claim 11, wherein the oil guide is arranged in an intermediate region between the first gearwheel and the first side wall region of the transmission housing.