Seal Arrangement for a Tyre Pressure-Regulating Device

• US 20080314487A1
• Filed: 01/18/2007
• Published: 12/25/2008
• Est. Priority Date: 02/10/2006
• Status: Active Grant

• Current Assignee: Schaeffler Technologies AG & Co.KG (INA-Holding Schaeffler GmbH & Co. KG)
• Original Assignee: Schaeffler KG (INA-Holding Schaeffler GmbH & Co. KG)
• Inventors: Schaefer, Marc-Andre, Walter, Wilhelm, Heuberger, Robert
• Granted Patent: US 7,997,316 B2
• Time in Patent Office: Days
• US Class Current: 152/418
• CPC Class Codes: B60C 23/00363 Details of sealings
• CPC Class Codes: F16C 19/364 with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
• CPC Class Codes: F16C 19/543 in O-arrangement
• CPC Class Codes: F16C 41/005 Fluid passages not relating to lubrication or cooling

Abstract

Seal arrangement for a tire pressure-regulating device for a motor vehicle, comprising a compressed-air supply to a vehicle tire through a hole in the inner ring of a rolling bearing of a wheel bearing, through a seal housing which is connected to a wheel hub in a rotationally fixed manner and through the wheel hub itself, wherein a flat seal is fixed on the inner ring of the rolling bearing, with the radially outer end of the said seal having a sealing lip which is directed towards the seal housing and bears against it.

Claims

1. A seal arrangement for a tire pressure regulating device for a motor vehicles with a compressed air supply to a vehicle tire through a bore in the inner ring of a rolling bearing of a wheel bearing, through a seal housing connected fixedly in terms of rotation to a wheel hub, and through the wheel hub itself, comprising a flat seal fastened on the inner ring of the rolling bearing, the radially outer end of the seal has a sealing lip directed toward the seal housing and bearing against the latter.

2. The seal arrangement as claimed in claim 1, wherein the flat seal consists of an elastomer or elastic plastic material.

3. The seal arrangement as claimed in claim 1, wherein the flat seal is connected to a carrier part arranged firmly on the inner ring of the rolling bearing.

4. The seal arrangement as claimed in claim 1, wherein within the seal housing, a sliding ring is fastened, of which the inner surface pointing away from the seal housing is in sealing contact with the outer surface, pointing toward the seal housing, of a sheet metal ring, in that the sheet metal ring is designed with a trough-shaped or pot-shaped cross section and has a bore on its bottom pointing toward the bearing inner ring, and in that the bottom side, facing toward the bearing inner ring, of the sheet metal ring lies on the flat seal in the region of the bore of the latter.

5. The seal arrangement as claimed in claim 1, wherein leakage reception spaces for the reception or transfer of leakage air are formed essentially between the flat seal and the inner ring-side end of the seal housing.

6. The seal arrangement as claimed in claim 5, wherein leakage reception spaces are designed in such a way that they are flow-connected to bores for leakage discharge and to the sealing gap between the sliding ring and the sheet metal ring.

7. The seal arrangement as claimed in claim 1, wherein bores, oriented axially parallel to the compressed air supply, for discharging the leakage air occurring during filling with compressed air are formed in the seal housing.

8. The seal arrangement as claimed in claim 1, wherein bores, oriented axially parallel to the compressed air supply, for discharging the leakage air occurring during filling with compressed air are formed in the flat seal and in the inner ring of the rolling bearing.

9. The seal arrangement as claimed in claim 1, wherein bores, pointing radially outward, for discharging the leakage air occurring during filling with compressed air are formed laterally, near the bottom, in the sheet metal ring.

10. The seal arrangement as claimed in claim 1, wherein the bores provided for diverting leakage air are connected to a venting valve.