DE102017117217A1 - Improvement of the sealing effect of bearings - Google Patents

Abstract

The invention relates to a clutch bearing device (1), in particular clutch release bearing or clutch engagement bearing, comprising: - a bearing inner element (2) which is rotatable about an axis of rotation (D) which is aligned in the axial direction (A), - wherein the bearing inner element (2 ) and in its interior a cavity (H) formed symmetrically with respect to the axis of rotation (D), the cavity (H) comprising, along the axial direction (A), a radius which is variably adapted to the diameter of the cavity (H) to vary along the axis of rotation (D).

Description

The invention relates to a clutch bearing device, in particular in the form of a clutch release bearing or clutch engagement bearing.

In conventional clutch bearing devices, such as a clutch release bearing, wear, dirt and fluids, such as oil, pass from a clutch device to the release bearing or clutch bearing device.

Despite provided seals to protect the release bearing and the clutch bearing device called abrasion and / or dirt and / or fluid enters the camp and affects its function and life.

It is therefore an object of the present invention to provide a clutch bearing device which is inexpensive and can be produced in a material-saving manner and has an improved sealing performance, in particular in the case of release bearings, in order to protect against contamination.

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

• - ein Lagerinnenelement, das um eine Drehachse, die in axialer Richtung ausgerichtet ist, rotierbar ist,
• - wobei vorzugsweise das Lagerinnenelement in seinem Inneren einen zur Drehachse symmetrisch ausgebildeten Hohlraum umfasst.

According to the invention comprises in the present invention, a clutch bearing device, in particular a clutch release bearing or a clutch engagement bearing:

• a bearing inner element, which is rotatable about an axis of rotation which is aligned in the axial direction,
• - Preferably, wherein the bearing inner element comprises in its interior a symmetrical to the axis of rotation formed cavity.

Preferably, the cavity along the axial direction comprises a radius that is variably configured to vary the diameter of the cavity along the axis of rotation. Due to the variable design of the diameter can be promoted by the centrifugal forces or centrifugal forces by rotation of the bearing inner element dirt and / or fluid of, for example, a smaller diameter of the cavity towards a larger diameter of the cavity. In this case, dirt and / or fluid moves along the inner circumferential surface of the bearing inner element, which forms the cavity.

Furthermore, it is preferred that the cavity is conical or conical. In this way, it is easy and defined to realize a radius of variable design along the axial direction.

Furthermore, it is favorable that the bearing inner element in the axial direction comprises a first end side and an opposite second end side, wherein preferably the cavity extends in the axial direction, in particular over the entire length from the first end side to the second end side.

It is also advantageous if the cavity in the axial direction has a length which corresponds at least to the diameter of a rolling element of the coupling bearing device in the axial direction. In other words, it is favorable if the length of the cavity in the axial direction corresponds to at least one rolling element diameter.

Advantageously, the cavity in the axial direction has a length which corresponds to a multiple of the diameter of a rolling element of the coupling bearing device in the axial direction. It is advantageous if the axial length or the length in the axial direction of the cavity corresponds to 1.1 to 3.5 times the diameter of a rolling element.

Preferably, the bearing inner element comprises in the axial direction a first end side and an opposite second end side.

It can also be provided that the cavity at a shoulder, which is preferably arranged radially inward on the bearing inner element or on its inner lateral surface, has a first radius and on the second end side has a second radius.

Alternatively or additionally, it is possible that the cavity has a first radius at the first end face and has a second radius at the second end face.

Conveniently, the first radius is formed smaller than the second radius to promote fluids and / or dirt from the shoulder and / or the first end face with the first radius toward the second end face with the second radius.

Furthermore, it is possible for the cavity to comprise the second radius on the coupling side.

It is also advantageous if the inner circumferential surface of the bearing inner element which delimits the cavity comprises a surface structure, in particular a twist applied by means of turning machining. Using the surface structure, dirt and / or fluid in addition to variable trained diameter to be promoted, whereby the conveying effect is increased.

Furthermore, it is advantageous if the surface structure is designed to convey fluids and / or dirt in one direction, in particular to convey in a direction in the course of which the radius of the cavity increases. Thus, the conveying effect can be enhanced.

It is also advantageous if the surface structure is helically formed on the lateral surface of the cavity.

Advantageously, the surface structure is formed as a thread on or within the lateral surface of the cavity.

Furthermore, it is favorable if the cavity in the axial direction has a length which corresponds at least to the width of a rolling body raceway in the axial direction, wherein preferably the rolling body raceway is arranged on the outside on the bearing inner element.

Advantageously, the clutch bearing device has a bearing outer element and rolling elements, which are arranged between the bearing outer element and the bearing inner element.

Furthermore, it is preferred that the cavity in the axial direction is preferably arranged radially within the rolling bodies.

It is also advantageous if the cavity and a rolling element are arranged in the axial direction to each other such that the length of the cavity in the axial direction and the diameter of a rolling element overlap at least partially, preferably completely, in the radial direction.

In other words, it is advantageous if the cavity extends radially inside the rolling bodies and has a length in the axial direction, so that the length of the cavity and the length of the cavity overlap or overlap at least partially, as seen in the radial direction cover. Stated another way, a straight line that extends from the axis of rotation and extends in the radial direction, preferably cuts a rolling element and the length of the cavity.

Alternatively, it is also possible that the cavity and the rolling elements are arranged in the axial direction to each other such that a radial overlap, or an overlap in the radial direction, the length of the cavity in the axial direction and the diameter of a rolling element can be avoided. In other words, it is advantageous if the cavity and the diameter of the rolling body or the rolling elements are arranged to each other such that they are arranged axially offset from one another, so that they do not overlap in the radial direction.

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

This idea preferably relates - in simplified terms - to a clutch bearing device having a conical bore in the interior.

Preferably, the present invention in all camps, including in for example truck release bearings, are used, which preferably no radial support, for. B. in the bore and in which favorably the inner ring or the bearing inner element is always rotated in one direction (with surfaces with swirl).

Preferably, the clutch bearing device according to the invention, in particular a clutch release or Kupplungsrückrücklager, can be used in "dry applications".

Expressed again in other words, it is advantageous if, by attaching a conical bore, a conveying action is generated in a certain direction and when dirt is applied, for example, dirt and / or fluid is conveyed back again in the direction of the coupling region.

Further, by applying a twist (e.g., in turning), this effect can be enhanced, and it is preferable to do so only for bearings having one direction of rotation.

In this way, in addition to the normal seal can be prevented that dirt and / or fluid enters the sealing area at all.

• 1 eine Schnittansicht auf eine erfindungsgemäße Kupplungslagervorrichtung nach einem ersten Ausführungsbeispiel;
• 2 eine Schnittansicht auf eine erfindungsgemäße Kupplungslagervorrichtung nach einem zweiten Ausführungsbeispiel;
• 3 eine Schnittansicht auf eine erfindungsgemäße Kupplungslagervorrichtung nach einem dritten Ausführungsbeispiel;
• 4 eine Schnittansicht auf eine erfindungsgemäße Kupplungslagervorrichtung nach einem vierten Ausführungsbeispiel; und
• 5 eine Schnittansicht auf eine erfindungsgemäße Kupplungslagervorrichtung nach einem fünften Ausführungsbeispiel; und
• 6 eine Schnittansicht auf eine Kupplungslagervorrichtung aus dem Stand der Technik.

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 coupling bearing device according to the invention according to a first embodiment;
• 2 a sectional view of a coupling bearing device according to the invention according to a second embodiment;
• 3 a sectional view of a coupling bearing device according to the invention according to a third embodiment;
• 4 a sectional view of a clutch bearing device according to a fourth embodiment of the invention; and
• 5 a sectional view of a coupling bearing device according to a fifth embodiment of the invention; and
• 6 a sectional view of a clutch bearing device of the prior art.

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

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

Shown in more detail 1 a clutch bearing device 1 , In particular a clutch release bearing, with a bearing inner element 2 that is about a rotation axis D in the axial direction A is aligned, is rotatable.

Further, the clutch bearing apparatus has 1 a bearing outer element 5 and rolling elements W between the outer bearing element 5 and the bearing inner element 2 are arranged.

The bearing inner element 2 includes in its interior one to the axis of rotation D symmetrically formed cavity H which is along the axial direction A includes a radius that is variably formed. This can change the diameter of the cavity H along the axis of rotation D vary.

In other words, the cavity is H conical or conical running formed.

Here has the bearing inner element 2 in the axial direction A a first face 3 and an opposite second end face 4 where the cavity H over the entire length from the first end 3 to the second end face 4 in the axial direction A extends.

In other words, the cavity points H in the axial direction A a length greater than the diameter of a rolling element W the clutch bearing device 1 in the axial direction A equivalent.

So has the cavity H in the axial direction A a length which is a multiple of the diameter of a rolling element W the clutch bearing device 1 in the axial direction A equivalent.

As 1 shows is the cavity H in the axial direction A radially inside the rolling elements W or within the rolling element shown W is arranged.

Also are the cavity H and the rolling element W in the axial direction A arranged such that the length L of the cavity in the axial direction A and the diameter X a rolling element W partially overlap, in the radial direction R considered.

In other words, extends radially within the rolling body W or the rolling elements of the cavity H and points in the axial direction A a length L on, taking the length of the diameter X and the length L of the cavity H partially, in the radial direction R Seen, overlap or overlap or overlap. Again, in other words, a straight line intersects with the axis of rotation D goes out and in the radial direction R extends a rolling element W and the length L of the cavity H ,

As already mentioned, the bearing inner element 2 in the axial direction A a first face 3 and an opposite second end face 4 on, with the cavity H at the first end 3 has a first radius and a second end face 4 has a second radius.

Here, the first radius is formed smaller than the second radius to fluids and dirt from the first end face 3 with the first radius towards the second end face 4 to promote with the second radius.

The cavity H has the second radius on the clutch side.

2 shows a sectional view of a coupling bearing device according to the invention according to a second embodiment, 3 a sectional view of a coupling bearing device according to the invention 1 according to a third embodiment and 4 a sectional view of a coupling bearing device according to the invention 1 according to a fourth embodiment.

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 of the embodiments according to the 2 to 5 received.

First of all, when comparing 1 With 2 and 4 to hold that in 2 and 4 the inner lateral surface M of the bearing inner element 2 that the cavity H limited, has a surface structure comprising a spin applied twist.

Thus, the clutch bearing device 1 formed by the surface structure, to promote fluids and dirt in one direction, and in one direction to promote, in the course of which the radius of the cavity H increases.

Further show 2 and 4 in that the surface structure is helical on the lateral surface M of the cavity H is formed, wherein the surface structure as a thread on the lateral surface M of the cavity H is trained.

When comparing 1 With 3 and 4 it is noticeable that the conical formation of the cavity H from the first front 3 towards the second end 4 not continuous is formed continuously, but of a paragraph on the second end face 4 is limited.

When comparing the 1 and 5 it is noticeable that the conical cavity H in the axial direction A to the rolling element W is arranged offset.

Furthermore, the cavity has H on a heel 6 a first radius and at the second end face 4 a second radius. Again, the first radius is made smaller than the second radius to fluids and dirt from the paragraph 6 with the first radius along the lateral surface M towards the second end 4 to promote with the second radius.

Additionally shows 5 that the cavity H and the rolling element shown W in the axial direction A are arranged such that the length L of the cavity H in the axial direction A and the diameter of the rolling element W do not overlap or are the rolling elements W and the length L of the cavity H in the axial direction A shifted to each other.

Finally, it should be mentioned that 6 a sectional view of a clutch bearing device 1 from the prior art shows.

It can be clearly seen that between the first 3 and the second end face 4 the cavity H in the axial direction A is not formed conically, as is the case in the clutch bearing devices according to the invention 1 the case is.

LIST OF REFERENCE NUMBERS

1

Clutch bearing device

2

Inner bearing element

3

first end face

4

second end face

5

Outer bearing element

6

paragraph

A

axial direction

D

axis of rotation

H

cavity

L

Length of the cavity

M

lateral surface

R

radial direction

W

rolling elements

X

Diameter of the rolling element

Claims (10)

Clutch bearing device (1), in particular clutch release bearing or clutch engagement bearing, comprising: a bearing inner element (2) which is rotatable about an axis of rotation (D) which is aligned in the axial direction (A), - wherein the bearing inner element (2) in its interior a to the axis of rotation (D) symmetrically formed cavity (H), - Wherein the cavity (H) along the axial direction (A) comprises a radius which is variably adapted to vary the diameter of the cavity (H) along the axis of rotation (D). Clutch bearing device according to Claim 1 - wherein the cavity (H) is conically formed, - wherein preferably the bearing inner element (2) in the axial direction (A) a first end face (3) and an opposite second end face (4), and wherein the cavity (H ) in the axial direction (A), preferably over the entire length from the first end face (3) to the second end face (4). Clutch bearing device according to Claim 1 or 2 , wherein the cavity (H) in the axial direction (A) has a length (L) which is at least the diameter of a Rolling elements of the clutch bearing device (1) in the axial direction (A) corresponds. Clutch bearing device according to one of the preceding claims, wherein the cavity (H) in the axial direction (A) has a length (L) which corresponds to a multiple of the diameter of a rolling element of the clutch bearing device (1) in the axial direction (A). Clutch bearing device according to one of the preceding claims, - wherein the bearing inner element (2) in the axial direction (A) comprises a first end face (3) and an opposite second end face (4), - Preferably wherein the cavity (H) at a shoulder (6) has a first radius and at the second end face (4) has a second radius, or preferably wherein the cavity (H) at the first end face (3) has a first radius and at the second end face (4) has a second radius, wherein preferably the first radius is smaller than the second radius to promote fluids and debris from the shoulder (6) or the first face (3) of the first radius to the second face (4) of the second radius, - Preferably wherein the cavity (H) on the coupling side comprises the second radius. Coupling bearing device according to one of the preceding claims, wherein the inner circumferential surface (M) of the bearing inner element (2), which delimits the cavity (H), a surface structure, in particular a rotationally applied swirl comprises. Clutch bearing device according to Claim 6 , - wherein the surface structure is adapted to promote fluids and dirt in one direction, in particular to promote in a direction in the course of which the radius of the cavity (H) increases. Clutch bearing device according to Claim 6 or 7 , - wherein the surface structure is helically formed on the lateral surface (M) of the cavity (H), - wherein preferably the surface structure is formed as a thread on the lateral surface (M) of the cavity (H). Clutch bearing device according to one of the preceding claims, - wherein the cavity (H) in the axial direction (A) has a length (L) which corresponds at least to the width of a Wälzkörperlaufbahn in the axial direction (A), - In which preferably the rolling body raceway is arranged on the outside on the bearing inner element (2). Clutch bearing device according to one of the preceding claims, - wherein the clutch bearing device (1) has a bearing outer element (5) and rolling elements (W), which are arranged between the bearing outer element (5) and the bearing inner element (2), - Wherein the cavity (H) in the axial direction (A) and preferably radially within the rolling elements (W) is arranged, and - wherein the cavity (H) and the rolling elements (W) in the axial direction (A) are arranged to each other such that the length (L) of the cavity (H) in the axial direction (A) and the diameter of a rolling body (W) at least partially, preferably completely, in the radial direction (R) overlap, or wherein the cavity (H) and the rolling body (W) in the axial direction (A) are arranged to each other such that an overlap in the radial direction (R) of the length ( L) of the cavity (H) in the axial direction (A) and the diameter of a rolling body (W) is avoidable.

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