Seal device and seal assembly

Patent metadata

Field	Value
Publication number	US-11092239-B2
Application number	US-201716466167-A
Country	US
Kind code	B2
Filing date	Oct 25, 2017
Priority date	Dec 16, 2016
Publication date	Aug 17, 2021
Grant date	Aug 17, 2021

Abstract

The invention relates to a seal device ( 1 ) for sealing two bearing elements which rotate relative to each other about an axis (D), in particular for sealing a rolling bearing. The seal device ( 1 ) includes a sealing section ( 2 ) for sealing purposes and a fastening section ( 3 ) for holding the seal device ( 1 ) against a bearing element ( 21 ). The sealing section ( 2 ) is arranged at one end of the fastening section ( 3 ) and includes a free end (E) opposite thereof. All the sections ( 2, 3 ) have a common carrier element ( 4 ) and at least one sealing element ( 5 ), and all the sections ( 2, 3 ) extend in the radial direction (R) and/or in the axial direction (A). The fastening section ( 3 ) extends at least partly in the axial direction (A) such that the carrier element ( 4 ) and the sealing element ( 5 ) rest directly against a bearing element ( 21 ) in order to form a clamping seat in the radial direction (R) by the carrier element ( 4 ) in order to hold against a bearing element ( 21 ) and a static seal by the seal element ( 5 ) in order to seal against a bearing element ( 21 ). The invention further relates to a seal assembly ( 20 ) for a rolling bearing, in particular for a wheel bearing assembly, including a bearing element ( 21 ) and a seal device ( 1 ).

First claim

The invention claimed is:

1. A seal device for sealing two bearing elements that rotate relative to each other about an axis, the seal device comprises:
a sealing section for sealing, and
a fastening section configured to hold the seal device on one of the bearing elements,
the sealing section is arranged on a first end of the fastening section and comprises a tree end opposite the first end,
the sealing section and the fastening section have a common carrier element and at least one sealing element, and the carrier element and the sealing section along with the sealing element are arranged adjacent to each other in an axial direction along an axial end side of the bearing element, and the carrier element and the sealing element directly contact an inner lateral surface of the bearing element,
the sealing section and the fastening section extend in at least one of a radial direction or an axial direction,
the fastening section extends at least partially in the axial direction and is configured for direct contacting of the carrier element and the sealing element on the bearing element, in order to form a force fit in the radial direction by the carrier element for holding on the bearing element and to form a static seal by the sealing element for sealing against the bearing element.

2. The seal device according to claim 1 , wherein, in the radial direction, directed outward from a rotational axis of the seal device, the sealing element extends past the carrier element in the fastening section, and is configured to guarantee a secure static seal against the bearing element.

3. The seal device according to claim 1 , wherein the sealing section extends at least partially in the radial direction and is configured for the direct contacting on the bearing element, in order to form a stop for positioning on the bearing element by the carrier element.

4. A seal assembly for a rolling bearing, comprising:
a bearing element,
a seal device according to claim 1 ,
the bearing element comprises, in the radial direction, the inner lateral surface and an outer lateral surface, and in the axial direction, the axial end side that connects the inner lateral surface to the outer lateral surface,
the sealing section of the seal device is arranged on the axial end side of the bearing element to position the seal device and the fastening section of the seal device is arranged on the inner lateral surface of the bearing element to hold the seal device on the bearing element, and
the carrier element and the sealing element directly contact the inner lateral surface of the bearing element in the fastening section of the seal device, in order to form a force fit in the radial direction by the carrier element to hold on the inner lateral surface of the bearing element and to form a static seal by the sealing element for sealing against the inner lateral surface of the bearing element.

5. The seal assembly according to claim 4 , wherein the seal device comprises, on the free end of the sealing section, an extension that is formed by the sealing element such that a seal gap is produced between the extension and the outer lateral surface of the bearing element, and a non-abrasive pre-seal is formed between the extension of the seal device and the outer lateral surface of the bearing element.

6. The seal assembly according to claim 5 , wherein the axial end side of the bearing element comprises a first part for arrangement of the sealing section of the seal device and a second part for forming a labyrinth seal, the second part of the axial end side surrounds at least partially the sealing section, in order to form the labyrinth seal, the second part of the axial end side forms an annular recess, in order to form the labyrinth seal with the sealing section of the seal device, and the extension is arranged at least partially within the second part of the axial end side of the bearing element and at a distance to the second part, in order to cover an axial seal gap between the extension and the second part of the axial end side.

7. The seal assembly according to claim 6 , wherein the second part of the axial end side comprises a base, a first side part, and a second side part, the extension is arranged at least partially within the second part of the axial end side of the bearing element and at a distance to the base of the second part of the axial end side, in order to cover the axial seal gap between the extension and the base by the first side part of the second part of the axial end side.

8. The seal assembly according to claim 7 , wherein the bearing element comprises a drainage channel for collecting and draining a lubricant, the extension extends into the drainage channel, the extension has a step-shaped construction, the outer lateral surface of the bearing element follows a shape of the extension, the extension forms a collection channel that is open in the radial direction, and the extension surrounds, together with the sealing section and the fastening section, the second part of the axial end side of the bearing element.

9. A seal device for sealing two bearing elements that rotate relative to each other about an axis, the seal device comprises:
a sealing section for sealing, and
a fastening section configured to hold the seal device on one of the bearing elements,
the sealing section is arranged on a first end of the fastening section and comprises a free end opposite the first end,
the sealing section and the fastening section have a common carrier element and at least one sealing element,
the sealing section and the fastening section extend in at least one of a radial direction or an axial direction,
the fastening section extends at least partially in the axial direction and is configured for direct contacting of the carrier element and the sealing element on the bearing element, in order to form a force fit in the radial direction by the carrier element for holding on the bearing element and to form a static seal by the sealing element for sealing against the bearing element,
further comprising an extension on the sealing section that extends in at least one of the radial or axial direction and is formed by the sealing element, the extension forms, together with the sealing section and the fastening section, a U-shaped cross section that is adapted for holding the bearing element, and the extension is arranged on the free end of the seal section.

10. A seal device for sealing two bearing elements that rotate relative to each other about an axis, the seal device comprises:
a fastening section configured to hold the seal device on one of the bearing elements,
a sealing section arranged on a first end of the fastening section and comprises a free end opposite the first end,
the sealing section and the fastening section have a common carrier element and a sealing element affixed to the carrier element,
the sealing section and the fastening section extend in a radial direction and in an axial direction,
the fastening section extends at least partially in the axial direction and is configured for direct contacting of an axially extending part of the carrier element on the bearing element, in order to form a force fit in the radial direction by the carrier element for holding on the bearing element and is configured for direct contact of the seal element on the bearing element to form a static seal,
wherein the seal element is configured for direct contact on an inner lateral surface of the bearing element to form the static seal, and the seal element includes an extension on the free end thereof that extends in an axial direction and is adapted to form a seal gap between the extension and an outer lateral surface of the bearing

Assignees

• Schaeffler Technologies Ag

Inventors

• Happ Alexander
• Krapf Marco

Classifications

• F16J15/3232 Primary

  having two or more lips · CPC title

• F16C2326/02

  Wheel hubs or castors · CPC title

• F16C33/805

  in addition to other sealings, e.g. dirt guards to protect sealings with sealing lips · CPC title

• F16C33/7876

  with sealing lips · CPC title

• F16J15/3268

  Mounting of sealing rings · CPC title