DE102020112044A1 - Rolling bearing with flinger - Google Patents

Abstract

The invention relates to a rolling bearing with a rotating inner bearing ring (1) and a stationary outer bearing ring (2), each of which has radially opposite raceways (3, 4) for rolling elements (5) that correspond to one another and are spaced apart from one another by a rolling element cage (6) are arranged on at least one bearing end face (7; 8) a formed from a sheet metal material centrifugal disc (9 - 9 '' '') for the bearing cover, the bearing inner ring side via a fastening edge portion (10) to an outer radial receiving edge portion (11) of the bearing inner ring ( 1) is attached, the centrifugal disk (9 '- 9' '' ') having a guide edge section (13' - 13 '' '') extending outward in the axial direction from a radially extending central section (12) on the outer bearing ring side, which while maintaining a radial gap dimension with an axially extending sealing edge portion (14) of the bearing outer ring (2) cooperates, at de n a radially inwardly extending stop section (15) directly adjoins in the interior of the bearing.

Description

The invention relates to a rolling bearing with a rotating inner bearing ring and a stationary outer bearing ring, each having corresponding radially opposite raceways for rolling elements which are guided at a distance from one another by a rolling element cage, a flinger formed from sheet metal being arranged on at least one bearing face for bearing cover , which is attached to the bearing inner ring side via a fastening edge section to an outer radial receiving edge section of the bearing inner ring.

The field of application of the invention extends primarily to motor vehicle technology. Particularly in the case of rapidly rotating gear shaft bearings, the rolling bearings with centrifugal disks of interest here are used in applications where too much gear oil or dirt is to be prevented from penetrating the interior of the bearing in order to cause splashing losses or wear. A sufficient sealing effect is achieved with centrifugal disks through rotation and centrifugal force delivery. The centrifugal disk, which is usually on the outside, shields the sealing gap that results between the outer edge of the centrifugal disk and the inner wall of the bearing outer ring. The centrifugal disc is attached to the inner ring of the bearing in a form-fitting connection over the inner edge.

State of the art

From the US 6,283,634 B1 several embodiments of a generic roller bearing with flinger disks emerge. In all embodiments, a flinger formed from a sheet metal material is arranged on each side of the bearing to cover the bearing, each of which is attached to an outer radial receiving edge portion of the bearing inner ring via a fastening edge portion in a form-fitting manner. The outer edge section of the centrifugal disk forms a radial gap with a sealing edge section of the bearing outer ring on the inner wall side, which on the one hand allows a relative rotation between the bearing inner ring and the bearing outer ring and on the other hand ensures that the bearing inner ring is shielded as completely as possible from the ingress of dirt and lubricating oil.

According to one in the one there 1 The embodiment shown, the sealing edge section of the bearing outer ring is provided with an additional recess, which is used in the context of a standardization with regard to the same construction for the alternative mounting of a seal instead of a flinger on the roller bearing. However, if a centrifugal disk is installed in connection with such a standardized roller bearing, dirt can accumulate in the area of the recess, which cannot be removed and can penetrate into the interior of the bearing as it accumulates. This leads to undesired wear on the rolling bearings.

In the embodiment according to 2 instead of a recess on the bearing outer ring and also on the bearing inner ring, only a shoulder with a radial stop section and an essentially axial sealing edge section is realized. This means that no dirt can collect at this point. The radial stop section serves to limit the position of the centrifugal disk during assembly. After springing back, an axial gap is formed here. The essentially axially running sealing edge section, however, runs at an obtuse angle with respect to the axially running stop section in order to promote the outflow of lubricating oil transported away by the centrifugal disk. The radial gap dimension exists between the outer edge of the centrifugal disk and the sealing edge section corresponding thereto.

The centrifugal disc is made as a stamped and bent part from sheet metal and is bent several times in cross-section in order to create enough free space for the bearing cage. When the centrifugal disk is pressed onto the outer radial receiving edge section of the bearing inner ring, however, the sealing disk may flare up, so that the radial and, in particular, the axial gap dimension is not maintained. In extreme cases, the centrifugal disc grinds on the bearing outer ring, which causes additional wear and a reduction in the efficiency of the bearing.

In the embodiment according to 3 grinding is prevented by vulcanizing an elastomer material onto the outer radial edge of the centrifugal disk. Although this prevents metallic grinding of the adjacent components, a centrifugal disk designed in this way is subject to increased manufacturing costs.

It is therefore the object of the present invention to further improve a generic roller bearing in such a way that its centrifugal disk can on the one hand be easily manufactured in terms of manufacturing technology and on the other hand can be reliably installed in the desired position.

Disclosure of the invention

The invention includes the technical teaching that a centrifugal disk on the bearing outer ring side is one of a radially extending Has a special guide edge section extending outward in the center section and axially outward, which interacts with a sealing edge section of the bearing outer ring running axially in cross section, while maintaining a radial gap dimension, to which a radially inward stop section directly adjoins in the interior direction of the bearing.

The advantage of the solution according to the invention is, in particular, that the shape, which is simplified compared to the prior art, creates a reinforced outer edge area which minimizes the centrifugal disk turning up during assembly. Since the centrifugal disk according to the invention does not have a cross-sectional shape which creates space for an internal bearing cage, simple and dimensionally accurate manufacture can be guaranteed. This is because there is no absurdly curved edge area that causes component stresses in different directions. Since the axially extending sealing edge section is at a right angle to the radially extending stop section, this area of the bearing outer ring corresponding to the centrifugal disk can also be produced simply by turning a ring shoulder internally.

According to a first embodiment of the centrifugal disk according to the invention, the outer guide edge section thereof runs at right angles from the central section and, in the mounted state on the roller bearing, extends outward in order to open out in the axial direction. On the one hand, this ensures a high edge reinforcement and the right-angled shape is sufficient to divert the lubricating oil transported radially outward by the centrifugal disk to the outside via the guide edge section without creating a backflow effect. The leading edge section of this centrifugal disk can be produced, for example, by deep drawing or the like, in that a cylindrical deep drawing punch interacts with a die bore.

With regard to a second embodiment, it is provided that the guide edge section of the centrifugal disk extends outward at an obtuse angle from the radial central section. As a result, compared to the previous embodiment, an improved diversion is brought about by the inclination of the guide edge section. The obtuse angle is to be dimensioned in such a way that the outer radial end area of the middle section is just positioned axially adjacent to the stop section of the bearing outer ring. On the other hand, a sufficient discharge of thrown off lubricating oil can also be achieved with a sufficiently short axially extending sealing edge section on the bearing outer ring.

According to a third embodiment, the guide edge section of the centrifugal disk, viewed in cross section, is bent several times from the radial central section and extends radially outward in the axial direction. This corresponds to the first embodiment described above.

According to a fourth embodiment, it is proposed that the leading edge section of the centrifugal disk be rounded outwards from the radial central section and that it also open out in the axial direction. A rounded leading edge section also gives the component sufficient rigidity and can be easily manufactured as a stamped and bent part.

According to a further measure improving the invention, it is proposed that the inner radial fastening edge section of the centrifugal disk be beaded at least in sections along the circumference. Corresponding to this, the outer radial receiving edge section of the bearing inner ring cooperating with the fastening edge section should have an annular undercut for holding the flanged fastening edge section in order to create a positive connection of the flinger on the bearing inner ring.

Figure list

• 1 einen Teilschnitt durch ein Wälzlager nach Art eines Kugellagers mit beidseitig montierten Schleuderscheiben gemäß Stand der Technik,
• 1a eine Schnittdarstellung im Bereich des Leitrandabschnitts der Schleuderscheibe gemäß 1 mit Ölflussverlauf,
• 2 eine Schnittdarstellung im Bereich des Leitrandabschnitts gemäß einer ersten Ausführungsform einer erfindungsgemäßen Schleuderscheibe,
• 3 eine Schnittdarstellung im Bereich des Leitrandabschnitts gemäß einer zweiten Ausführungsform einer erfindungsgemäßen Schleuderscheibe,
• 4 eine Schnittdarstellung im Bereich des Leitrandabschnitts gemäß einer dritten Ausführungsform einer erfindungsgemäßen Schleuderscheibe, und
• 5 eine Schnittdarstellung im Bereich des Leitrandabschnitts gemäß einer vierten Ausführungsform einer erfindungsgemäßen Schleuderscheibe.

Further measures improving the invention are set out in more detail below together with the description of the preferred embodiments against the background of the prior art. It shows:

• 1 a partial section through a roller bearing in the manner of a ball bearing with flinger disks mounted on both sides according to the state of the art,
• 1a a sectional view in the area of the leading edge portion of the centrifugal disk according to FIG 1 with oil flow curve,
• 2 a sectional view in the area of the leading edge section according to a first embodiment of a centrifugal disk according to the invention,
• 3 a sectional view in the area of the leading edge section according to a second embodiment of a centrifugal disk according to the invention,
• 4th a sectional view in the area of the guide edge section according to a third embodiment of a centrifugal disk according to the invention, and
• 5 a sectional view in the area of the guide edge section according to a fourth embodiment of a centrifugal disk according to the invention.

According to 1 the roller bearing designed as a single-row ball bearing consists essentially of an inner bearing ring 1 , which is attached to a rotating shaft (not shown) and with a bearing outer ring which is fixed in a stationary manner in a housing (also not shown here) 2 cooperates. The bearing inner ring 1 has a career 3 for spherical rolling elements 5 on; the bearing outer ring has the same 2 also a career 4th for the rolling elements 5 on. All rolling elements 5 are via a rolling element cage 6th out of plastic spaced apart.

At both ends of the bearing 7th and 8th is in each case a centrifugal disk formed from a sheet metal material 9 attached to the bearing cover. The fastening takes place via a fastening edge section provided on the bearing inner ring side 10 , which is flanged along the circumference and on an outer radial receiving edge portion 11 of the bearing inner ring 1 is arranged such that the slinger 9 in an undercut provided there 16 engages in the manner of a clip connection.

The slinger shown here 9 of the prior art consists of a steel sheet and is produced as a stamped and bent part by forming.

In terms of the detail according to 1a the shaping takes place in such a way that a central section 12th the slinger 9 of the prior art in the assembled state the rolling bearing cage 6th arched at a distance. In particular, the outer radial edge area has a U-shaped profile, which represents a shape in the direction of the interior of the bearing. According to the arrow, this comes from the slinger 9 lubricating oil conducted away accordingly following the contour to the outside.

To 2 has a slinger according to the invention 9 'on the other hand, one of the radially extending middle section 12th outgoing in guide edge section extending therefrom at right angles 13th 'which opens out in the axial direction.

The slinger 9 '- like the other embodiments of alternative centrifugal disks according to the invention - act while maintaining a radial gap dimension with an axially extending sealing edge section 14th of the bearing outer ring 2 together, on which there is a radially inwardly extending stop section in the inside direction of the bearing 15th directly, as in 1 illustrated. To that extent is the centrifugal disk according to the invention 9 'against the slinger 9 of the prior art interchangeable.

the 3 illustrates a second embodiment of a centrifugal disk according to the invention 9 ", in which a leading edge section 13th 'at an obtuse angle from the radial central section 12th goes out.

In a third embodiment according to 4th runs a leading edge section 13th '''the slinger 9 '''bent several times from the radial middle section 12th out to the outside. The multiple kinking causes the leading edge section 13th '''in contrast to the previous embodiment opens out in the axial direction.

In the fourth embodiment according to 5 is a leading edge section 13th '''' the slinger 9 '''' is rounded and goes from the radial middle section 12th the end. The rounded leading edge section 13th '''' also opens out in the axial direction.

The invention is not limited to the embodiments described above. Rather, modifications thereof are also conceivable, which are also covered by the scope of protection of the following claims. For example, mixed forms of the above geometries are also conceivable. It is also conceivable that a guide edge section just adjoins the radial middle section, that is to say without an outwardly extending edge-side shape, provided a drainage contour is provided on the part of the bearing outer ring.

List of reference symbols

1

Bearing inner ring

2

Bearing outer ring

3

first career

4th

second career

5

Rolling elements

6th

Rolling element cage

7th

first bearing face

8th

second bearing face

9

Slinger

10

Fastening edge section

11

Receiving edge section

12th

Middle section

13th

Leading edge section

14th

Sealing edge section

15th

Stop section

16

Freeway

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was 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.

Patent literature cited

• US 6283634 B1 [0003]

Claims (10)

Rolling bearings with a rotating inner bearing ring (1) and a stationary outer bearing ring (2), each of which has radially opposite raceways (3, 4) for rolling elements (5) that correspond to one another and are spaced apart from one another by a rolling element cage (6) At least one bearing end face (7; 8) a flinger disc (9-9 '''') formed from a sheet metal material is arranged for the bearing cover and is fastened on the bearing inner ring side via a fastening edge section (10) to an outer radial receiving edge section (11) of the bearing inner ring (1) , characterized in that the centrifugal disk (9 '- 9'''') on the bearing outer ring side has a guide edge section (13' - 13 '''') which starts from a radially extending central section (12) and extends outward in the axial direction, which under Compliance with a radial gap dimension cooperates with an axially extending sealing edge section (14) of the bearing outer ring (2), to which s I a radially inwardly extending stop section (15) directly connects in the interior direction of the bearing. Roller bearings after Claim 1 , characterized in that the guide edge section (13 ') of the centrifugal disk (9') extends outwards at right angles from the central section (12) in order to open out in the axial direction. Roller bearings after Claim 1 , characterized in that the guide edge section (13 ") of the centrifugal disk (9") extends outward at an obtuse angle from the radial central section (12). Roller bearings after Claim 1 , characterized in that the guide edge section (13 ''') of the centrifugal disk (9''') extends outwardly from the radial central section (12) in a multiple fold manner in order to open out in the axial direction. Roller bearings after Claim 1 , characterized in that the leading edge section (13 '''') of the centrifugal disk (9 '''') extends outward in a rounded manner from the radial central section (12) in order to open out in the axial direction. Roller bearings after Claim 1 , characterized in that there is an axial gap between the radial stop section (15) and the centrifugal disk (9 '- 9'''') which opens into the radial gap. Roller bearings after Claim 1 , characterized in that the reshaped centrifugal disk (9 '- 9'''') is made from a sheet steel consisting of a stamped and bent part. Roller bearings after Claim 1 , characterized in that the inner radial fastening edge section (10) of the centrifugal disk (9 '- 9'''') is at least partially beaded along the circumference. Roller bearings after Claim 8 , characterized in that the outer radial receiving edge section (11) of the bearing inner ring (1) cooperating with the fastening edge section (10) has an annular undercut (16) for engaging the flinger (9 '- 9'''') in the manner of a clip connection. Rolling bearing according to one of the preceding claims, characterized in that the rolling elements (5) are spherical and interact with radially opposite raceways (3, 4) each having a concave cross section, the rolling bearing being designed in the manner of a single-row ball bearing.

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