Directly driven drive axle with a gear train comprising an axially-fixed sun pinion

• US 20060009324A1
• Filed: 09/02/2003
• Published: 01/12/2006
• Est. Priority Date: 09/02/2002
• Status: Active Grant

• Current Assignee: Harlan Global Manufacturing, LLC
• Original Assignee: Ewald Speth Antriebstechnik GmbH
• Inventors: Keuth, Karl-Heinz
• Granted Patent: US 7,351,178 B2
• Time in Patent Office: Days
• US Class Current: 475/221
• CPC Class Codes: B60K 17/046 with planetary gearing having orbital motion
• CPC Class Codes: B60K 17/16 of differential gearing
• 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 1/28 with gears having orbital motion
• CPC Class Codes: F16H 37/082 and additional planetary reduction gears
• CPC Class Codes: F16H 57/025 Support of gearboxes, e.g. torque arms, or attachment to other devices

Abstract

The invention relates to a drive axle for electrically-driven vehicles with an electric motor (11), arranged on the driven motor shaft (12) and driveshafts (14, 15), connected to the motor shaft (12) with an interposed reduction gear train (13) and a subsequent differential gear for each wheel arranged thereon. An externally-toothed sun pinion (19) is arranged on the motor shaft (12), supported in motor shaft bearings (25) connected to the gearbox housing of the gear train as part of the reduction gear train, characterised in that the motor shaft bearings (25) are embodied as bearings for support of radial and axial forces and a bush (26) is arranged between the motor shaft bearings (25) and the sun pinion (19) which is supported on both sides against the motor shaft bearing (25) and the sun pinion (19). The sun pinion (19) is fixed against the bush (26) by a fixing means (28), located at the free end of the motor shaft (12). The sun pinion (19) and the gear wheels (20) of the reduction gear train (13) in engagement therewith are embodied as helical gear with a force component acting in the direction of the motor shaft bearing (25).

Claims

1-5. -5. (canceled)

6. A driving axle for a vehicle that is driven by an electric motor, comprising:

a driven motor shaft 12, wherein said electric motor 11 is disposed on said motor shaft;

drive shafts 14, 15 coupled to said motor shaft 12 via the interposition of a reduction transmission stage 13 and a following differential transmission, wherein said drive shafts 14, 15 are intended for wheels respectively disposed thereon;

an externally toothed sun pinion 19 that, as part of said reduction transmission stage 13, is disposed on said motor shaft 12, which is mounted in motor shaft bearings 25 that are connected to a gearbox 24 of said reduction transmission stage 13, wherein said motor shaft bearings 25 are embodied as bearings that absorb radial and axial forces;

a sleeve 26 that is disposed between said motor shaft bearings 25 and said sun pinion 19 and is supported on opposite sides against said motor shaft bearings and said sun pinion;

a securing means 28 disposed on a free end of said motor shaft 12 for fixing said sun pinion 19 against said sleeve 26; and

gears 20 of said reduction transmission stage 13 that mesh with said sun pinion 19, wherein said sun pinion and said gears 20 are embodied as helical gears having a force component that acts in the direction of said motor shaft bearings 25.

7. A driving axle according to claim 6, wherein said sun pinion 19 is supported directly against said sleeve 26.

8. A driving axle according to claim 6, wherein a spacer disk 27 is disposed between said sleeve 26 and said sun pinion 19.

9. A driving axle according to claim 6, wherein said securing means 28 fixes said sun pinion 19 against said sleeve 26 with bias.

10. A driving axle according to claim 6, wherein said sun pinion 19 is disposed between said sleeve 26 and said securing means 28 with slight axial play.