DRIVE DEVICE FOR DRIVING A WHEEL OF A SPRING STRUT-TYPE AXLE FOR AN ELECTRICALLY DRIVABLE VEHICLE

• US 20140011620A1
• Filed: 02/01/2012
• Published: 01/09/2014
• Est. Priority Date: 03/16/2011
• Status: Abandoned Application

• Current Assignee: ZF Friedrichshafen AG (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Original Assignee: ZF Friedrichshafen AG (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Inventors: Munster, Martin, Pollmeyer, Stephan, Heimann, Jens
• Application Number:
  US14/004,742
• Publication Number:
  US 20140011620A1
• Time in Patent Office: Days
• US Class Current: 475/149
• CPC Class Codes: B60K 17/046 with planetary gearing having orbital motion
• CPC Class Codes: B60K 2007/0038 the motor moving together with the wheel axle
• CPC Class Codes: B60K 2007/0061 the motor axle being parallel to the wheel axle
• CPC Class Codes: B60K 7/0007 the motor being electric
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility

Abstract

A drive device (1) for driving a wheel (2) of a spring strut axle for an electrically driven vehicle. The drive device has an electric machine (3) and a transmission unit, and the transmission unit has a spur gear transmission (5) and a planetary transmission (4) which, viewed in the direction of the flow of force in traction operation, is positioned at the output side of the electric machine (3) in the sequence of from the electric machine (3) to the planetary transmission (4) and then to the spur gear transmission (5).

Claims

1-14. -14. (canceled)

15. A drive device (1) for driving a wheel (2) of a spring strut axle of an electrically driven vehicle, the drive device comprising:

an electric machine (3), and

a transmission unit,

the transmission unit comprising a spur gear transmission (5) and a planetary transmission (4) which, viewed in a direction of a flow of force during traction operation, being positioned on an output side of the electric machine (3) in a sequence of the planetary transmission (4) and then the spur gear transmission (5).

16. The drive device (1) for driving the wheel (2) of the spring strut axle for the electrically driven vehicle according to claim 15, wherein a rotor (9) of the electric machine (3) is designed as inner rotor and is connected, via a sun gear shaft (10), with a sun gear (11) of the planetary transmission (4), a carrier (12) of the planetary transmission (4) is connected, via a carrier shaft (13), with a pinion (14) of the spur gear transmission (5), which meshes with a spur gear (15), which is either connected with a wheel hub (16) of the wheel (2), or is designed as single part with the wheel hub (16), and a ring gear (17) of the planetary transmission (4) is fixed in positioned to a housing.

17. The drive device (1) for driving the wheel (2) of the spring strut axle for the electrically driven vehicle according to claim 16, wherein a bearing of an output (20) of the drive device (1) is formed by a wheel bearing of the wheel (2).

18. The drive device (1) for driving the wheel (2) of the spring strut axle for the electrically driven vehicle according to claim 16, wherein at least one of the rotor (9) of the electric machine (3) is designed as one part with the sun gear shaft (10) and the carrier shaft (13) is designed as one part with the pinion (14).

19. The drive device (1) for driving the wheel (2) of the spring strut axle for the electrically driven vehicle according to claim 15, wherein the planetary transmission (4) and the spur gear transmission (5), when axially viewed, are positioned on a side of the electric machine (3) which faces the wheel (2).

20. The drive device (1) for driving the wheel (2) of the spring strut axle for the electrically driven vehicle according to claim 15, wherein the planetary transmission (4) is positioned on a side of the electric machine (3) which faces away from the wheel (2), and the spur gear transmission (5) is positioned on a side of the electric machine (3) which faces toward the wheel (2), and the electric machine (3) is an inner rotor motor and a rotor (9) thereof is a hollow shaft, and a carrier shaft (13) of the planetary transmission (4) passes through a cavity of the rotor (9) of the electric machine (3) to a pinion (14) of the spur gear transmission (5).

21. The drive device (1) for driving the wheel (2) of the spring strut axle for the electrically driven vehicle according to claim 15, wherein a housing (18, 19) of the drive device (1) is directly connected to a wheel carrier (8) of a spring strut.

22. The drive device (1) for driving the wheel (2) of the spring strut axle for the electrically driven vehicle according to claim 21, wherein the housing (18, 19) is one of screwed to the wheel carrier (8), integrated with the wheel carrier (8) as a multi-part welded component, and designed as one part with the wheel carrier (8).

23. The drive device (1) for driving the wheel (2) of the spring strut axle for the electrically driven vehicle according to claim 15, wherein an attachment of a brake caliper, in a case of at least one of a disc brake, a damper (6) and a spring, is integrated with a housing (18, 19) of the drive device (1).

24. The drive device (1) for driving the wheel (2) of the spring strut axle for the electrically driven vehicle according to claim 23, wherein connecting screws for securing the brake caliper are housing screws for attaching the drive device (1) to a wheel carrier (8) of the spring strut axle.

25. The drive device (1) for driving the wheel (2) of the spring strut axle for the electrically driven vehicle according to claim 15, wherein the electric machine has an output shaft that is rotatable at a high maximum rotational speed that is larger than 5,000 rpm and a ratio of the rotational speed of the output shaft of the electric machine with respect to a rotational speed of a wheel shaft, is larger than 10.

26. The drive device (1) for driving the wheel (2) of the spring strut axle for the electrically driven vehicle according to claim 15, wherein at least a majority of the drive device is positioned ahead of a center of the wheel with respect to a forward drive direction of the vehicle.

27. The drive device (1) for driving the wheel (2) of the spring strut axle for the electrically driven vehicle according to claim 15, wherein at least a majority of the drive device is positioned after a center of the wheel with respect to a forward drive direction of the vehicle.

28. The drive device (1) for driving the wheel (2) of the spring strut axle for the electrically driven vehicle according to claim 15, wherein at least a majority of the drive device is positioned at opposite track rods of a spring strut with respect to a center of the wheel.

29. The drive device (1) for driving the wheel (2) of the spring strut axle for the electrically driven vehicle according to claim 15, wherein the electric machine has an output shaft that is rotatable at a high maximum rotational speed that is between 6,000 rpm and 10,000 rpm and a ratio of the rotational speed of the output shaft of the electric machine with respect to a rotational speed of a wheel shaft, is between 14 and 17.

30. The drive device (1) for driving the wheel (2) of the spring strut axle for the electrically driven vehicle according to claim 15, wherein the electric machine has an output shaft that is rotatable at a high maximum rotational speed that is around 7,000 rpm and a ratio of the rotational speed of the output shaft of the electric machine with respect to a rotational speed of a wheel shaft, is around 16.

31. A drive device (1) for driving a wheel (2) of a spring strut axle of an electrically driven vehicle, the drive device comprising:

an electric machine (3), and

a transmission unit,

the transmission unit comprising a spur gear transmission (5) and a planetary transmission (4) which, viewed in a direction of a flow of force during traction operation, being positioned on an output side of the electric machine (3) such that the flow of force during traction operation flows from the electric machine (3), through the planetary transmission (4) and to the spur gear transmission (5).

32. A drive device for driving a wheel of a spring strut axle of an electrically driven vehicle, the drive device comprising:

an electric machine (3),

a planetary transmission (4), and

a spur gear transmission (5),

a rotor of the electric machine being continuously connected to and driving a sun gear of the planetary transmission,

a ring gear of the planetary transmission being continuously connected to a housing enclosing the planetary transmission (4) and the spur gear transmission (5),

a planetary carrier of the planetary transmission being continuously connected to and driving a pinion gear of the spur gear transmission,

a spur gear of the spur gear transmission meshing with and being driven by the pinion gear, and

the spur gear of the spur gear transmission being continuously connected to a wheel hub which supports the wheel of the spring strut axle.