Axle assembly for drive device of a motor vehicle

• US 10,179,478 B2
• Filed: 09/17/2015
• Issued: 01/15/2019
• Est. Priority Date: 09/17/2015
• Status: Active Grant

• Current Assignee: ZF Friedrichshafen AG (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Original Assignee: ZF Friedrichshafen AG (Zeppelin - Stiftung der Stadt Friedrichshafen)
• Inventors: Bauer, Manuel, Neumuller, Rudolf, Lenz, Paul, Haselberger, Peter, Sigl, Horst, Dudek, Daniel, Kobler, Matthias, Wagner, Daniela, Hildebrand, Rainer, Brachmeier, Stefan
• Primary Examiner(s): Yabut, Daniel D
• Application Number:
  US14/857,400
• Publication Number:
  US 20170080753A1
• Time in Patent Office: 1,216 Days
• CPC Class Codes: B60B 35/125 of the planetary type
• CPC Class Codes: B60B 35/14 composite or split, e.g. half- axles; Couplings between axle parts or sections
• CPC Class Codes: B60B 35/166 characterised by reinforcements, e.g. reinforcement ribs
• CPC Class Codes: F16H 48/08 comprising bevel gears
• CPC Class Codes: F16H 57/025 Support of gearboxes, e.g. torque arms, or attachment to other devices
• CPC Class Codes: F16H 57/027 characterised by means for venting gearboxes, e.g. air breathers
• CPC Class Codes: F16H 57/037 Gearboxes for accommodating differential gearings rotating cases for differential gearings F16H48/40
• CPC Class Codes: F16H 57/0457 Splash lubrication characterised by the problem reducing losses, e.g. splash losses F16H57/0409
• CPC Class Codes: F16H 57/0483 Axle or inter-axle differentials

Abstract

An axle assembly for a drive device for the road wheels of a vehicle includes: a stationary housing having a housing interior at least partially filled with a lubricating liquid; axle housings connected to the stationary housing and configured to permit axles of the vehicle to pass towards the road wheels; a venting bore in one of the axle housings configured to allow pressurized air to escape from the stationary housing; and at least one rib sized and positioned in the housing interior of the stationary housing so as to prevent migration of the lubricating liquid out of the venting bore.

Claims

1. An axle assembly (1) for a drive device for road wheels (7) of a vehicle, comprising:

a stationary housing (10) having a housing interior (9) at least partially filled with a lubricating liquid;

differential supports (23) arranged in the housing interior (9), the differential supports contactingly supporting a differential of the drive device;

axle housings (20) connected to and extending from the stationary housing (10) and structured and arranged with respect to the stationary housing (10) so as to provide respective openings through which the axles (5) of the vehicle pass towards the road wheels (7);

a venting bore (22) in one of the axle housings (20) configured to allow pressurized air to escape from the stationary housing (10); and

at least two ribs (34) arranged, parallel or substantially parallel to each other, at an upper surface of said housing interior (9) of said stationary housing (10) and positioned transverse to a direction of the one of the axle housings (20) having the venting bore (22), said at least two ribs (34) being arranged in a region of the housing interior (9) at which the stationary housing (10) joins the one of the axle housings (20) having the venting bore (22) so as to prevent migration of the lubricating liquid out of the venting bore (22), at least one of the at least two ribs (34) being arranged in the housing interior (9) so as to extend from one of the differential supports (23) to an opposing wall of the stationary housing (10).

2. The axle assembly (1) according to claim 1, wherein each of said at least two ribs (34) comprises a wall portion projecting radially inwardly in relation to the housing interior (9) and configured to intercept lubricating liquid in said stationary housing (10).

3. The axle assembly (1) according to claim 1, wherein said at least two ribs (34) are formed integrally with said stationary housing (10).

4. The axle assembly (1) according to claim 1, wherein said at least two ribs (34) are fastened to said housing interior (9) of said stationary housing (10).

5. The axle assembly (1) according to claim 1, wherein said at least two ribs (34) are arranged substantially parallel with a drive shaft of the drive device and perpendicular to an axis of rotation of the axles (5).

6. The axle assembly (1) according to claim 1, wherein the number of the at least two ribs (34) equals two.