DE102018101137A1 - sealing device - Google Patents

Abstract

The invention relates to a sealing device (1) for sealing two bearing elements (41, 42) rotatable relative to one another about an axis (D), in particular for sealing a wheel bearing (40), wherein the sealing device (1) comprises:
an inside (IS) on which rolling elements can be arranged, and an outside (AS),
a first sealing element (2) for fastening to a bearing element (42), the first sealing element (2) sealingly protecting the inner side (IS) from the outer side (AS), and
- wherein the first sealing element (2) comprises an annular carrier part (3) and a pulse generator part (4) for detecting the rotational speed,
- Wherein the pulse generator part (4) on the end face of the annular support member (3) is arranged, which is oriented to the inside (IS).

Description

The invention relates to a sealing device of a wheel bearing for sealing two about an axis relative to each other rotatable bearing elements.

In other words, the invention preferably relates to a so-called. Clean encoder including an interface seal.

From the DE 10 2012 216 940 A1 An ABS encoder arrangement is known in which a magnetic field of a multipole structure of a multipole ring is detected by a sensor device having a sensor head.

An annular cap member of the encoder assembly is disposed between the multi-pole structure attached to an angle ring of a seal assembly and the sensor head.

Here, between the sensor head and the annular cap element and between the annular cap element and the multipole structure in each case a gap which spaces the individual components from each other.

However, these two gaps, as well as the ring cap element, degrade the detection of the magnetic field that creates the multipole structure. As a result, an exact detection of the speed of the multipole structure is weakened relative to the sensor head.

It is therefore an object of the present invention to provide a sealing device for sealing two about an axis relative to each other rotatable bearing elements, which is inexpensive and material-saving to produce and ensures improved detection of the speed or a magnetic field to be detected.

This object is achieved by the features of the independent claim. Further advantageous developments are the subject of the dependent claims.

According to the invention comprises in a first aspect of the present invention, a sealing device of a wheel bearing for sealing two about an axis relative to each other rotatable bearing elements.

• - eine Innenseite, auf welcher Wälzkörper anordenbar sind, und eine Außenseite,
• - ein erstes Dichtelement zum Befestigen an einem Lagerelement, wobei das erste Dichtelement die Innenseite von der Außenseite dichtend schützt, und
• - wobei das erste Dichtelement ein kreisringförmiges Trägerteil und ein Impulsgeberteil zur Erfassung der Drehzahl umfasst.

Preferably, the sealing device comprises:

• an inside on which rolling elements can be arranged, and an outside,
• a first sealing element for fastening to a bearing element, the first sealing element sealingly protecting the inside from the outside, and
• - Wherein the first sealing element comprises an annular support member and a pulse generator part for detecting the rotational speed.

The pulse generator part is preferably an encoder or a multipole structure which generates a changing magnetic field that can be conveniently detected by a sensor.

By changing the magnetic field can be concluded that the speed of the pulse generator part.

Furthermore, it is advantageous if the pulse generator part is annular or hollow cylindrical or preferably follows the shape of the annular carrier part.

Preferably, the pulse generator part is arranged on the end face of the annular support part, which is oriented to the inside. In this way, the pulse generator is protected against any wear and dirt.

It is also advantageous if the pulse generator part is attached to the end face of the annular support member. In other words, it is advantageous if therefore the pulse generator part and the annular carrier part are formed in one piece.

Preferably, the annular support member in cross section comprises a first, radially inner and a second, radially outer end.

Conveniently, the first end has a smaller distance from the axis of rotation compared to the second end.

It is also advantageous if the first sealing element comprises a first hollow-cylindrical carrier part.

Advantageously, the first hollow cylindrical support member with the annular support member, in particular with its first end, connected. In this context, it is advantageous if the first hollow cylindrical support member and the annular support member are integrally formed.

Furthermore, it can be provided that the first hollow-cylindrical carrier part extends away from the annular carrier part in the direction of the outside. In this way, the first hollow cylindrical support member and the annular support member together in cross section form an L-shape.

Preferably, the first hollow cylindrical support part extends inwardly from the annular support part in the direction of the inside. Also in this embodiment, the first hollow cylindrical support member and the annular support member in cross-section together form an L-shape.

It is also advantageous if the first hollow-cylindrical carrier part then extends outwards in the direction of the outer side in order to form a connecting piece of U-shaped cross-section. In summary, therefore, is advantageous if the first hollow cylindrical support member initially extends in the direction of the inside and then in the direction of the outside, whereby a cross-sectionally U-shaped connector is formed.

Advantageously, a first hollow-cylindrical carrier part on the side facing away from the annular support member end face comprises a sealing part to the interface seal for a connection point between a bearing element and a joint bell. Thus, the first hollow-cylindrical carrier part leading leading to a component and thus generate a sealed area.

The sealing part preferably comprises a sealing lip, wherein the sealing lip expediently extends inwards in the radial direction.

Conveniently, the sealing part encloses the axial end of the first hollow cylindrical support part.

Furthermore, it can be provided that the pulse generator part extends from the annular carrier part, in particular from a radially outer second end of the annular carrier part, in the axial direction towards the inside, so that the pulse generator part is L-shaped. In this way, a labyrinth seal can be formed.

It is also advantageous if the first sealing element comprises a second hollow-cylindrical carrier part.

Preferably, the second hollow cylindrical support member extends in the axial direction towards the inside.

Conveniently, the second hollow cylindrical support member is disposed at a radially outer second end of the annular support member.

Furthermore, it is advantageous if the pulse generator part at least partially surrounds the second hollow-cylindrical carrier part in order to form a labyrinth seal.

Furthermore, it can be provided that the first hollow-cylindrical carrier part comprises a further annular carrier part on the end face facing away from the annular carrier part.

It is possible that the first hollow cylindrical support member and the further circular support member and preferably also the circular support member are integrally formed.

Preferably, the further annular support part extends from the first hollow cylindrical support part in cross-section in the radial direction inwards. As a result, the distance to a connection point between a bearing element and a joint bell can be reduced.

Advantageously, the further annular carrier part comprises a sealing part, which extends in the radial direction to the interface seal inwards. In this way it is possible to seal a joint between a bearing element and a joint bell.

It is also advantageous if the sealing part comprises a sealing lip, wherein preferably the sealing lip extends inward in the radial direction.

Conveniently, the sealing part at least partially surrounds the further annular carrier part.

Furthermore, it is possible for a further sealing part to be arranged on the radially outwardly oriented side of the first hollow-cylindrical carrier part.

Preferably, the further sealing part of the first hollow cylindrical support member is integrally connected to the sealing part of the further annular support member.

It is also advantageous if the sealing device comprises a second sealing element for fastening to a bearing element.

Preferably, the second sealing element comprises a carrier element, which is at least partially enveloped by a sealing material.

Conveniently, the support element is formed in cross-section C-shaped.

Advantageously, the sealing material has a first and a second sealing part.

It can also be provided that the first sealing part touchingly bears against the first sealing element or a third sealing element in order to seal the inner and outer sides against one another.

Furthermore, it is advantageous if the third sealing element is L-shaped, wherein preferably the third sealing element is arranged on a bearing element.

It is also advantageous if the first sealing part is arranged at the radially inner end of the carrier element and preferably in the axial and / or radial direction close to the first sealing element in order to form a labyrinth seal between the first and second sealing element.

Conveniently, the first sealing part has a sealing lip, wherein preferably the sealing lip extends inward in the radial direction.

Advantageously, the first and / or second sealing part on an elastic sealing material, such as rubber on.

Furthermore, it is favorable if the sealing material comprises rubber as the material.

It is also possible that the second sealing part at least partially surrounds the carrier element at its radially outer end on the side which is oriented to the outside. As a result, a labyrinth seal can be created.

It is also conceivable that the first sealing part and the second sealing part are integrally formed.

Preferably, the support member, in particular the annular support member and / or the hollow cylindrical support member, as a deep-drawn part of a sheet material, in particular made of a corrosion-resistant chromium-nickel steel, or from a non-ferrous metal sheet.

A second aspect of the present invention includes a wheel bearing for a motor vehicle.

It is expressly understood that the features of the sealing device, as mentioned in the first aspect, can be used individually or in combination with each other in the wheel bearing application.

In other words, the features mentioned above under the first aspect of the invention relating to the sealing device can also be combined here with further features in the second aspect of the invention.

• - ein erstes Lagerelement,
• - ein zweites Lagerelement,
• - wobei zwischen dem ersten und zweiten Lagerelement Wälzkörper angeordnet sind.

A wheel bearing for a motor vehicle preferably comprises:

• a first bearing element,
• a second bearing element,
• - Wherein are arranged between the first and second bearing element rolling elements.

It is further preferred that the wheel bearing comprises a sealing device, in particular according to the abovementioned first aspect of the invention, for protecting the rolling bodies.

In this case, it is favorable if the sealing device, in particular with its first hollow-cylindrical carrier part, covers or seals a joint bell of a constant-velocity joint, in order to prevent the penetration of dirt.

Hereinafter, the inventive idea presented above is expressed in other words in addition.

This idea preferably concerns - in simplified terms - a sealing device with a carrier plate or a carrier part and a pulse generator part or an encoder, the encoder being arranged behind the carrier plate. Thus, the encoder is protected from wear and contamination by, for example, a metal sheet.

• 1 eine Schnittansicht auf eine erfindungsgemäße Dichtungsvorrichtung nach einem ersten Ausführungsbeispiel; und
• 2 eine Schnittansicht auf eine erfindungsgemäße Dichtungsvorrichtung nach einem zweiten Ausführungsbeispiel.

The invention will be explained in more detail by means of embodiments in conjunction with accompanying drawings. Here are shown schematically:

• 1 a sectional view of a sealing device according to the invention according to a first embodiment; and
• 2 a sectional view of a sealing device according to the invention according to a second embodiment.

In the following description, like reference characters will be used for like items.

1 shows a sectional view of a sealing device according to the invention 1 according to a first embodiment.

Shown in more detail, shows 1 a wheel bearing 40 with a first bearing element 41 , a second bearing element 42 wherein between the first and second bearing element 41 . 42 Rolling elements (not shown) are arranged.

Furthermore, the wheel bearing 40 a sealing device 1 to protect the rolling elements (not shown).

The sealing device 1 for sealing two around an axis D relative to each other rotatable bearing elements 41 . 42 a wheel bearing 40 includes an inside IS on which rolling elements (not shown) are arranged, and an outer side AS ,

Furthermore, the sealing device 1 a first sealing element 2 for fastening to the bearing element 42 , wherein the first sealing element 2 or the sealing device 1 the inside IS from the outside AS protects tightly.

The first sealing element 2 includes an annular carrier part 3 and a pulse generator part 4 for detecting the speed.

The pulse generator part 4 is on the front side of the annular support member 3 attached to the inside IS is oriented.

The circular carrier part 3 has in cross-section a first, radially inner 3A and a second, radially outer end 3B on, being the first end 3A compared to the second end 3B a smaller distance to the axis of rotation D Has.

Further shows 1 in that the first sealing element 2 a first hollow cylindrical support part 5 includes, with the annular support part 3 or with its first end 3A connected is. Strictly speaking, the first hollow cylindrical carrier part 5 and the annular support part 3 formed in one piece.

In this case, the first hollow cylindrical support part extends 5 from the annular support part 3 outwards towards the outside AS path.

The first hollow cylindrical support part 5 has according to 1 at the to the annular support part 3 facing away from a sealing part 7 , This serves the interface seal for a connection point between the bearing element 42 or the wheel bearing 40 and a joint bell (not shown).

The sealing part 7 surrounds the axial end of the first hollow cylindrical support member 5 ,

In this case, the sealing part 7 a sealing lip 8th on, with the sealing lip 8th in the radial direction R extends inwards.

Further shows 1 in that the pulse generator part 4 from the annular support part 3 or from the radially outer second end 3B of the annular support member 3 in the axial direction A to the inside IS extends. Thereby, the pulse generator part 4 is L-shaped, whereby it is possible to form a labyrinth seal.

Also is in 1 to realize that the sealing device 1 a second sealing element 12 for fastening to the bearing element 41 has, wherein the second sealing element 12 a carrier element 13 includes.

The carrier element 13 is of a sealing material 14 at least partially wrapped and formed in cross-section C-shaped.

This includes the sealing material 14 of the carrier element 13 a first 14A and a second sealing part 14B , wherein the first sealing part 14A touching a third sealing element 15 is applied to the interior IS and outside AS seal against each other.

According to 1 is the third sealing element L-shaped and formed on the bearing element 42 arranged.

The first sealing part 14A is at the radially inner end of the support element 13 and in the axial and radial directions A . R close to the first sealing element 2 arranged to be between the first and second sealing element 2 . 12 to form a labyrinth seal.

The second sealing part 14B however, the carrier element envelops 13 at its radially outer end at least partially on the side facing the outside AS is oriented, whereby between the L-shaped pulse generator part 4 and the second sealing part 14B a labyrinth seal is created.

The first sealing part 14A has a sealing lip 16 extending in the radial direction R extends inwardly and, as already mentioned, on the third sealing element 15 is applied.

It is also conceivable that the first sealing part 14A and the second sealing part 14B are formed in one piece.

2 shows a sectional view of a sealing device according to the invention 1 according to a second embodiment.

Still more concrete, shows 2 also like 1 a wheel bearing 40 with a first bearing element 41 and with a second bearing element 42 wherein between the first and second bearing element 41 . 42 Rolling elements (not shown) are arranged.

Furthermore, the wheel bearing 40 a sealing device 1 to protect the rolling elements (not shown).

The sealing device 1 for sealing two around an axis D relative to each other rotatable bearing elements 41 . 42 a wheel bearing 40 includes an inside IS on which rolling elements (not shown) are arranged, and an outer side AS ,

Furthermore, the sealing device 1 a first sealing element 2 for fastening to the bearing element 42 , wherein the first sealing element 2 the inside IS from the outside AS protects tightly.

The first sealing element 2 includes an annular carrier part 3 and a pulse generator part 4 for detecting the speed.

Regarding the further embodiments will be to avoid unnecessary repetition to the first embodiment 1 referenced, which are analogously applicable here.

Therefore, only the differences between the first and second embodiments will be discussed below.

First, when comparing the 1 and 2 to hold that the first sealing element 2 in 1 is designed differently than the first sealing element 2 to 2 ,

Also in 2 has the first sealing element 2 a first hollow cylindrical support part 5 , wherein the first hollow cylindrical support part 5 with the annular support part 3 or with its first end 3A connected is.

Thus, the first hollow cylindrical support part extends 5 from the annular support part 3 first inward towards the inside IS away and then outward towards the outside AS , To a cross-sectionally U-shaped connector 6 to build.

Furthermore, the first hollow cylindrical support part extends 5 from the annular support part 3 continue outward towards the outside AS , so that the annular support element 3 in the axial direction A from the first hollow cylindrical support part 5 or extends away from the end face directed to the outside.

Further shows 2 in that the first sealing element 2 a second hollow cylindrical support part 9 has that in the axial direction A to the inside IS extends.

Here, the second hollow cylindrical support member 9 at a radially outer second end 3B arranged the annular support member, wherein the pulse generator part 4 the second hollow cylindrical support part 9 at least partially surrounds to form a labyrinth seal.

Furthermore, according to 2 the first hollow cylindrical support part 5 at the to the annular support part 3 facing away from another annular support member 10 ,

The further annular carrier part 10 extends from the first hollow cylindrical support member 5 in cross section in the radial direction R inward to the distance to a junction between the wheel bearing 40 or its bearing element 42 and a joint bell (not shown) to reduce.

Also is in 2 to recognize that the further annular carrier part 10 a sealing part 7 includes, extending to the interface seal in the radial direction R extends inwards. As a result, a connection point between the bearing element 42 and a joint bell (not shown) are sealed.

The sealing part 7 has after 2 a sealing lip 8th extending in the radial direction R extends inwards.

The sealing part 7 surrounds the further annular carrier part 10 ,

Further, on the radially outwardly oriented side of the first hollow cylindrical support part 5 another seal part 11 arranged with the sealing part 7 the further annular carrier part 10 is connected in one piece.

Also in the exemplary embodiment 2 has the sealing device 1 a second sealing element 12 for fastening to the bearing element 41 , wherein the second sealing element 12 a carrier element 13 includes.

The carrier element 13 of the second sealing element 12 is of a sealing material 14 partially wrapped and formed in cross-section C-shaped.

According to 2 has the sealing material 14 a first 14A and a second sealing part 14B , wherein the first sealing part 14A radially inwardly touching the first sealing element 2 or on the connector 6 is applied to the interior IS and outside AS seal against each other.

Regarding the two presented embodiments according to the 1 and 2 be still mentions that the pulse generator part 4 is designed as an encoder and in the circumferential direction of the shape of the annular support member 3 of the first sealing element 2 follows, and that preferably the sealing material and the sealing parts and sealing parts as a sealing material have a rubber.

LIST OF REFERENCE NUMBERS

1

sealing device

2

sealing element

3

annular carrier part

3A

first, radially inner end

3B

second, radially outboard end

4

pulse part

5

first hollow cylindrical support part

6

joint

7

sealing part

8th

sealing lip

9

second hollow cylindrical support part

10

another circular support part

11

another sealing part

12

second sealing element

13

support part

14

Seal material

14A

first sealing part

14B

second sealing part

15

third sealing element

16

sealing lip

40

Wheel bearings

41

bearing element

42

bearing element

IS

inside

AS

outside

A

axial direction

R

radial direction

D

Axis, axis of rotation

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102012216940 A1 [0003]

Claims (10)

Sealing device (1) of a wheel bearing (40) for sealing two bearing elements (41, 42) rotatable relative to one another about an axis (D), the sealing device (1) comprising: - an inner side (IS) on which rolling elements can be arranged, and an outer side (AS), - a first sealing element (2) for fastening to a bearing element (42), wherein the first sealing element (2) sealingly protects the inner side (IS) from the outer side (AS), and - wherein the first sealing element (2) an annular carrier part (3) and a pulse generator part (4) for detecting the rotational speed comprises, characterized in that the pulse generator part (4) on the end face of the annular support member (3) is arranged, which is oriented to the inside (IS) , Sealing device after Claim 1 , - wherein the pulse generator part (4) on the end face of the annular support member (3) is fixed, - preferably wherein the annular support member (3) in cross section a first (3A), radially inner and a second, radially outer end (3B) , - wherein preferably the first end (3A) compared to the second end (3B) has a smaller distance from the axis of rotation (D). Sealing device after Claim 1 or 2 - wherein the first sealing element (2) comprises a first hollow-cylindrical support part (5), - wherein preferably the first hollow cylindrical support part (5) with the annular support member (3), in particular with the first end (3A) is connected, - preferably the first hollow cylindrical support part (5) extends away from the annular support part (3) outwards in the direction of the outer side (AS), - preferably the first hollow cylindrical support part (5) extends from the annular support part (3) inwards towards the inside ( IS), wherein preferably the first hollow cylindrical carrier part (5) then extends outwards in the direction of the outer side (AS) in order to form a U-shaped connecting piece (6). Sealing device according to one of the preceding claims, - wherein a first hollow cylindrical support part (5) on the side facing away from the annular support part (3) end face comprises a sealing part (7) for interface seal for a connection point between a bearing element and a joint bell, - Preferably wherein the sealing part (7) comprises a sealing lip (8). Sealing device according to one of the preceding claims, - Wherein the pulse generator part (4) of the annular support member (3), in particular from a radially outer second end (3 B) of the annular support member (3), in the axial direction (A) to the inside (IS) extends, so that the pulse generator part (4) is L-shaped. Sealing device according to one of the preceding claims, - wherein the first sealing element (2) comprises a second hollow-cylindrical support part (9), wherein preferably the second hollow cylindrical carrier part (9) extends in the axial direction (A) towards the inside (IS), wherein preferably the second hollow cylindrical carrier part (9) is arranged at a radially outer second end (3B) of the annular carrier part (3), - Preferably wherein the pulse generator part (4), the second hollow cylindrical support member (6) at least partially surrounds to form a labyrinth seal. Sealing device according to one of the preceding claims, - Wherein the first hollow cylindrical carrier part (5) on the side facing away from the annular support part (3) facing away from another annular support member (10), wherein preferably the further annular carrier part (10) extends from the first hollow cylindrical support part (5) in the cross section in the radial direction (R) inwards in order to reduce the distance to a connection point between a bearing element and a joint bell, wherein preferably the further annular carrier part (10) comprises a sealing part (7) which extends in the radial direction (R) towards the interface seal in order to seal a connection point between a bearing element and a joint bell, wherein preferably the sealing part (7) comprises a sealing lip (8), - Preferably wherein the sealing part (7) at least partially surrounds the further annular support member (10). Sealing device after Claim 4 or 5 - Wherein on the radially outwardly oriented side of the first hollow cylindrical support member (5), a further sealing part (11) is arranged, - wherein preferably the further sealing part (11) of the first hollow cylindrical support member (5) with the sealing part (7) of the other annular support member (10) is integrally connected. Sealing device according to one of the preceding claims, - wherein the sealing device (1) comprises a second sealing element (12) for attachment to a bearing element (41), - preferably wherein the second sealing element (12) comprises a support element (13) which is made of a sealing material (14) is at least partially encased, - wherein preferably the sealing material (14) has a first (14A) and a second sealing part (14B), - preferably wherein the first sealing part (14A) contacting the first sealing element (2) or a third Sealing element (15) rests to seal the inner (IS) and outer side (AS) against each other. Wheel bearing (40) for a motor vehicle comprising: - a first bearing element (41), - a second bearing element (42), - between the first and second bearing element (41, 42) rolling elements are arranged, and - a sealing device (1) according to one of the Claims 1 to 9 to protect the rolling elements.

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