DE102009020861A1 - Clutch actuation bearing, in particular for a dual clutch system - Google Patents

Abstract

The invention relates to a clutch actuating bearing. According to the invention, a first ring element is attached to a bearing inner ring, which has a conical surface section which projects to the inner wall of the bearing outer ring. At the bearing outer ring, a second ring element is attached, which forms an inwardly penetrating annular jacket which extends, leaving a sealing gap along a rolling body facing away from the outside of the aforementioned conical surface portion.

Description

Field of the invention

The The invention relates to a clutch actuating bearing which serves as such by adjusting its axial position against an associated clutch system the engaged state of the coupling system. In particular, this depends the invention of an engagement bearing as such serves one to induce a clutch engagement state intended axial force to initiate a coupling system.

Background of the invention

Out DE 199 12 432 B4 a clutch actuating bearing in the form of a release bearing is known, which is arranged concentrically to a transmission main shaft and in the axial direction thereof displaceable. With a corresponding axial load of the clutch actuating bearing, the bearing can be moved to a disengaged position and thereby cancel the engaged state of an associated clutch system. The clutch actuating bearing comprises a bearing inner ring and a bearing outer ring. On the bearing inner ring, a ring element is placed which forms a radially outwardly penetrating radial flange. Between this radial flange and the inner wall of the bearing outer ring, a sealing gap is formed.

Next Non-contact sealing systems are used in clutch actuation bearings also used elastomer seals. Draw these elastomeric seals characterized by a high sealing effect. Due to the friction contact the sealing lips with the associated running surfaces results However, compared to non-contact seals typically a slightly higher level of frictional seizure leads to a warming of the bearing.

Object of the invention

Of the Invention is based on the object, a clutch actuating bearing to create this from a manufacturing point of view relatively is inexpensive to produce, and in addition to a high Lubricant retention effect also due to low bearing friction distinguished.

invention solution

These The object is achieved by a clutch actuating bearing with a bearing inner ring, a bearing outer ring, as well as rolling elements in a defined between the two bearing rings track space are received and support the two bearing rings against each other, this clutch operating bearing being characterized in that a first ring element is attached to the bearing inner ring the one to the inner wall of the bearing outer ring cone-like having penetrating skirt portion, and that in the bearing outer ring a second ring element is inserted, one inward penetrating ring jacket forms while leaving a sealing gap along a side facing away from the rolling elements outside of the cone shell portion extends.

Thereby it is possible in an advantageous manner, first already by the first ring element a surprisingly high Retention effect and also in interaction with the second ring member to create a tread system on Any lubricant that migrates out of the bearing area combined shear and centrifugal force exerted by which a high retention effect is achieved.

advantageous Embodiments of this clutch actuation bearing are Subject of the dependent claims.

Brief description of the figures

Further Details and features of the invention will become apparent from the following Description in connection with the drawing. It shows:

1 an axial sectional view illustrating the structure of a erfindungemäßen clutch actuation bearing for a dual-clutch transmission;

2 a detailed representation to illustrate further structural details of the clutch actuation bearing according to the invention, as well as the achieved here lubricant retention effect.

Detailed description the figures

This in 1 illustrated clutch actuation bearing according to the invention comprises a bearing inner ring 1 , a bearing outer ring 2 , as well as rolling elements 3 in one between the two bearing rings 1 . 2 defined railway space are included and the two bearing rings 1 . 2 supported against each other in the manner of an angular contact ball bearing.

The bearing outer ring 2 is in its the coupling device (not shown) facing the end region with a ring flange 2a provided as such the introduction of the bearing actuation forces in the bearing outer ring 2 serves.

The clutch actuating bearing according to the invention is characterized in that the bearing inner ring 1 a first ring element 4 recognized is the one to the inner wall of the bearing outer ring 2 penetrating cone shell section 4a and that to the bearing outer ring 2 a second ring element 5 is attached, which is an inwardly penetrating annular jacket 5a forms while leaving a sealing gap S along one of the rolling elements 3 remote from the outside of the cone shell section 4a extends.

The sealing gap S is designed so that its measured parallel to the bearing axis gap width in the interior is slightly lower than in the middle and in the outer area. The mutually facing and the sealing gap space defining lateral surfaces of the two ring elements 4 . 5 do not run in this way to each other equidistant.

The first ring element 4 also has a sleeve portion 4b on, which adjoins the outer edge region of the conical surface section 4a followed. The sleeve section 4b is designed such that this together with the inner wall of the bearing outer ring 2 also forms a running nip.

The first ring element 4 also has a press ring section 4d on the so on the geometry of a through the bearing inner ring 1 seat portion is matched, that the first ring element 4 anchored there under a relatively high load-bearing press fit. It is possible in the joint area of these two components 1 . 4 also to realize other geometries by which, for example, a positive locking of the first ring element 4 on the bearing inner ring 1 is reached.

In the embodiment shown here sits the bearing inner ring 1 in one of the bearing outer ring 2 encompassed axial area. The bearing inner ring 1 forms in the area of its inner peripheral surface 1a a dome surface. On this Kalottenfläche supports a balance ring 9 from. That balancing ring 9 in turn supports a pressure ring 10 from. The pressure ring 10 serves to initiate the guided over the bearing actuation force in a not-shown here coupling system.

At the bearing outer ring 2 is on the ring flange section 2a opposite rear one inward to the bearing inner ring 1 penetrating floor flange 2c educated. At this floor flange 2c closes along the inner edge of an inner ring land 2d at. This inner ring bridge 2d dives into a circumferential groove 1b of the bearing inner ring 1 and in conjunction with this component also forms a largely sealing gap.

How out 2 can be seen, the depth of insertion of the first ring element 4 on the bearing inner ring 1 by a radially retracted ring land 4c established. The first ring element 4 is dimensioned such that this almost the entire between the front bearing ring end face 1a and the rolling elements 3 extending axial region of the bearing inner ring 1 embraces. The sleeve section 4b of the first ring element 4 in this case forms a relative to the adjacent wall region of the bearing outer ring 2 largely foreclosed lubricant retention space R. To escape from this lubricant retention space lubricant would first to the rolling elements 3 penetrate and then into the circumferential annular gap between the sleeve portion 4b of the first ring element 4 and the inner peripheral wall of the bearing outer ring 2 penetration. In this circumferential annular gap prevails lubricant backpressure which builds up in the cone shell-like gap space S by lubricant shear stress, and by centrifugal force.

The second ring element 5 is on the bearing outer ring 2 axially secured. This is in the bearing outer ring 2 a safety groove 2 B educated. In this safety groove 2 B sits an outer ring shell section 5b of the second ring element 5 , In this ring shell section 5b are several notches 5c formed as such the ring shell section 5b divide into several segments. These segments can during the assembly of the second ring element 5 radially spring and snap at Ereichen the desired position of the ring element in the locking groove 2 B one.

The clear width ta, tb of the cone shell section 4a and the sleeve section 4b adjacent gap spaces is preferably in the range 0.2 to 0.8 mm. The ring elements shown here 4 . 5 are made of a high-strength material, especially steel. It is also possible to manufacture these components from high-strength plastic material, or in particular to perform as a metal-plastic composite components. As far as the bearing is designed essentially only for one direction of rotation, it is possible in the area of the gaps additional lubricant retention supporting structures such. B. to provide spiral grooves.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 19912432 B4 [0002]

Claims (7)

Clutch actuating bearing with: - a bearing inner ring ( 1 ), - a bearing outer ring ( 2 ), and - Rolling elements ( 3 ) in one between the two bearing rings ( 1 . 2 ) and the two bearing rings ( 1 . 2 ) against each other, characterized in that - in one between the bearing inner ring ( 1 ) and the bearing outer ring ( 2 ) lying on the bearing inner ring ( 1 ) a first ring element ( 4 ) is the one to the inner wall of the bearing outer ring ( 2 ) penetrating cone shell section ( 4a ), and - that in the bearing outer ring ( 2 ) a second ring element ( 5 ) is inserted, which has an inwardly penetrating annular jacket ( 5a ) forms while leaving a movement gap along one of the rolling elements ( 3 ) facing away from the outside of the conical surface section ( 4a ). Clutch actuating bearing according to claim 1, characterized in that the first ring element ( 4 ) a sleeve section ( 4b ) which adjoins the outer edge region of the conical surface portion ( 4a ). Clutch actuating bearing according to claim 2, characterized in that the sleeve portion ( 4b ) is designed such that this together with the inner wall of the bearing outer ring ( 2 ) forms a ring-cylindrical running gap. Clutch actuating bearing according to at least one of claims 1 to 3, characterized in that the first ring element ( 4 ) a press ring section ( 4d ) has the geometry of a through the bearing inner ring ( 1 ) is adjusted seat portion that the first ring element ( 4 ) is anchored there under a press fit. Clutch actuating bearing according to at least one of claims 1 to 4, characterized in that the first ring element ( 4 ) and the second ring element ( 5 ) in the region of their mutually facing surfaces of the conical surface portion ( 4a ) and the ring mantle ( 5a ) define a gap whose parallel to the bearing axis measured gap width (ta) in the vicinity of the bearing outer ring ( 2 ) is greater than in the middle region between these bearing rings ( 1 . 2 ). Clutch actuating bearing according to at least one of claims 1 to 5, characterized in that the sleeve portion ( 4b ) so far to the rolling elements ( 3 ) penetrates that this overlaps a peripheral portion of a Wälzkörperkäfigs. Clutch actuating bearing according to at least one of claims 1 to 6, characterized in that on the first ring element ( 4 ) an annular shoulder ( 4c ) is formed, which on an annular end face of the bearing inner ring ( 1 ) is seated.