DE102012215584A1 - Axial groove or angular contact ball bearing has sleeve which comprises radial flanges axially arranged on both sides, and elastic element is inserted into sleeve, and the running wheels are enclosed in radial flanges of sleeve - Google Patents

Abstract

The ball bearing has two inner race grooves (10,11) which are incorporated in the two axial sides of an inner running wheel (1). One of the two outer race grooves (12,13) is incorporated to inner axial side of an outer running wheels (2,3). The circumferentially spaced bearing balls (4a,5a) are arranged in two rows (4,5) of the inner race grooves and outer race grooves. A sleeve (6) comprises radial flanges (6a,6b) axially arranged on both sides. An elastic element (7) is inserted into the sleeve, and the running wheels are enclosed in the radial flanges of sleeve.

Description

Field of the invention

The invention relates to a two-sided axial or angular contact ball bearing and a drive arrangement for actuating a functional element in a motor vehicle.

Background of the invention

Double-sided thrust ball bearings and double-row angular contact ball bearings can be used in applications with predominantly axial tensile or compressive loads.

For example, in the document DE 402575 a thrust bearing with two or more rows of balls described.

The publication DE 20 2005 020 084 U1 describes the use of a double-acting axial ball bearing in a drive arrangement for the motorized actuation of a tailgate of a motor vehicle.

The publication DE 20 2005 016 953 U1 also describes a drive arrangement for the motorized actuation of a tailgate of a motor vehicle, which, however, has a bearing block instead of a double-acting axial ball bearing.

Two-way thrust ball bearings conventionally have several parts to be mounted separately, which must be secured or fixed during assembly in the bearing seat, which on the one hand makes their assembly consuming. On the other hand, double-acting axial deep groove ball bearings can have preloads or play in the case of incorrectly adjusted fixation.

Double-row angular contact ball bearings have a low load rating compared to double-acting axial ball bearings and are usually subject to play.

Summary of the invention

Task is to provide a two-sided axial or angular contact ball bearings available, which can be mounted easily and without play.

This object is achieved by a, in particular two-sided, axial or angular contact ball bearings, which comprises an axially formed on both sides with radial rims sleeve and an inserted into the sleeve elastic element. The bearing further comprises two, incorporated in the two axial sides of an inner running disk Innenlaufrillen and two Außenlaufrillen, of which at least one is incorporated in an inner axial side of an outer race. In the inner grooves and outer grooves while two rows of bearing balls are arranged circumferentially, in particular wherein each one ball bearing row is arranged in one of the inner grooves and in one of the outer grooves. The pulleys are enclosed by the radial rims of the sleeve.

In this way, an axial fixation of the pulleys and an encapsulation of the bearing can be effected by the sleeve. Thus, advantageously, a preassembled unit can be made available, can be dispensed with their mounting on an additional axial fixation of the pulleys. The elastic element used in the sleeve allows the bearing to bias play and thus provide a ready to install component available, which in a simple manner, for example by pressing, for example on a shaft, or by pressing, for example in a bearing seat, for example in a Housing, can be mounted. Overall, it is thus advantageously possible to provide an axial groove or angular contact ball bearing which can be loaded on both sides and can be mounted in a simple manner without play.

In principle, it is possible to additionally provide ball cages for the bearing ball rows.

Advantageously, however, it is also possible to design the bearing without cage cage. On the one hand costs can be reduced. On the other hand, a higher load capacity can be made possible by additional balls.

Preferably, the elastic element is an at least in the axial direction elastically acting element. In particular, the elastic element can be an element that acts elastically in both the axial and the radial direction.

It has been found that for a backlash-free preload of the bearing already a (single) elastic element is sufficient. In the sleeve can be used, for example, on one side an elastic element. For example, the elastic element may be arranged adjacent to a radial board, in particular to an inner axial side of a radial board. For example, the elastic member may be disposed between the inner axial side of a radial board and the outer axial side of a running disk.

In one embodiment, the elastic element is annular. For example, the elastic element may be a plastic ring or a plate spring.

In a preferred embodiment, the elastic element is a plastic ring, for example of an elastomeric material. Thus, the elastic element can be provided on the one hand cost and with a low weight. On the other hand, an elastic element in the form of a plastic ring simplifies the pre-assembly of the bearing, since plastics, in particular elastomeric materials, have a comparatively high surface friction, which allows the elastic element to retain the position when inserted into the sleeve and not to slip, for example. In addition, the pre-assembly is designed in a designed as a plastic ring elastic element in that can be dispensed with an exact positioning or conditioning of the elastic element on the sleeve, since its elastic properties is given due to the material properties in all spatial directions.

In a special embodiment of these embodiments, the sleeve has a receptacle for the elastic element, in particular the plastic ring on. The recording can be at least partially formed by one of the radial shelves. For example, the receptacle may be formed partially by a radial board and partially by a portion of the sleeve extending therebetween and extending between the radial rims. To form the receptacle, an end section of the radial board can be curved inwards.

At least one of the radial rims can serve as an attachment point or contact surface for an outer running disks.

For example, the one radial board can serve as an abutment point or bearing surface for an outer race, both at normal and high bearing loads.

The other radial board can only serve as a contact point or contact surface for an outer running disk at high loads acting on the bearing. In particular, a section of the radial flange, for example an inwardly curved end section, which for example forms the receptacle for the elastic element, serve as an abutment point or contact surface for an outer running disk, which bears on an elastic element, at high loads acting on the bearing is applied, which in turn rests against the radial board. Thus, it can be advantageously ensured that the elastic element, in particular a plastic ring, is not overloaded.

As an alternative or in addition to such an attachment point or such a contact surface, the sleeve may have a cavity adjoining the elastic element, for example in the form of an undercut, into which the elastic element can expand at high loads and thereby be protected from overloading. Preferably, such a cavity or undercut is substantially radially in the sleeve, for example in a between the Radialborden, in particular axially extending sleeve portion formed. Thus, an axial play of the bearing can be avoided while still achieving a relief of the elastic element at high loads.

Within the scope of a preferred embodiment, the bearing comprises two outer running disks. The outer grooves can be incorporated in each case in the inner axial sides of the two outer discs. The radial rims of the sleeve can thereby enclose the two outer running disks and in particular also the inner running disk arranged therebetween.

For example, one of the outer running discs, in particular with its outer axial side, abut against one of the radial rims, in particular on its inner axial side. The radial board can serve as a point of contact or contact surface both at normal and at high loads acting on bearings.

The other outer running disk can rest, in particular with its outer axial side, against the elastic element, in particular its inner axial surface.

The elastic element can in turn, in particular with its outer axial side, rest against the other radial board, in particular on its inner axial side.

In particular, a section of the other radial flange, for example an inwardly curved end section, which for example forms the receptacle for the elastic element, can serve as an abutment point or contact surface for the outer running disk resting on the elastic element at high loads acting on the bearing and / or adjacent to a, in particular substantially radial, cavity or undercut can be formed.

The bearing ball rows can be arranged in the context of this embodiment in each case between the inner disk and one of the outer disks. In particular, while the bearing ball rows each in one of the inner grooves of inner race and be arranged in one of the outer grooves of the outer discs.

In another embodiment, one of the outer raceways is machined into the inner axial side of the elastic element. The radial rims of the sleeve can thereby enclose the outer running disk equipped with one outer race and the elastic element equipped with the other outer race and in particular the inner running disk arranged therebetween.

In this embodiment, one of the rows of bearing balls may be disposed between the one axial side of the inner race and an outer race member such as an outer race, and the other of the rows of bearing balls between the other axial side of the inner race and the outer race provided with the elastic member. In this case, in particular, one of the rows of bearing ball in the inner race on the one axial side of the inner race and in an outer race, for example, the outer race, be arranged, wherein the other row of bearing balls in the inner race on the other axial side of the inner rotor disk and in the outer race of the with the Outboard groove provided elastic element can be arranged.

In the context of a special embodiment of the two preceding embodiments, one of the outer running disk also serves as an elastic element.

In another embodiment, one of the outer raceways is machined into the inner axial side of a radial board. For example, the outer race can be embossed in the sleeve, in particular in the radial board. The other outer race may be formed in the outer rotor, which optionally also serves as an elastic element.

In this embodiment, one of the rows of bearing balls may be disposed between the one axial side of the inner race and the outer race and the other of the rows of bearing balls between the other axial side of the inner race and the outer race provided with radial flange. Specifically, one of the rows of bearing balls in the inner race may be disposed on the one axial side of the inner race and in an outer race of the outer race, the other row of ball bearings in the inner race on the other axial side of the inner race and in the outer race of the radial flange provided with the outer race can be arranged.

In a further preferred embodiment, the sleeve is an outer sleeve with radially inwardly formed Radialborden. In this case, between the Radialborden, in particular axially, extending portion of the sleeve, in particular its radially outward side, for mounting in a bearing seat, for example in a housing, be designed. In this case, it is possible for the outer diameter of the annular elastic element and / or the outer diameter of the outer running disks to abut against the radially inward side of the section of the sleeve extending between the radial edges. The inner running disk can in particular be a wave washer, for example for mounting on a shaft.

In particular, it may be between the Radialborden, in particular axially extending portion of the sleeve, in particular its radially outward side, for a press fit in a bearing seat, for example in a housing, in particular with any internal geometry, for example, inter alia, with cylindrical inner geometry, designed or serve for its training. The inner running disk can in particular be a wave washer, in particular with any desired internal geometry, for example, inter alia, with a cylindrical internal geometry, for a press fit on a shaft.

In the context of another preferred embodiment, the sleeve is an inner sleeve with radial outward radial rims. In this case, between the Radialborden, in particular axially, extending portion of the sleeve, in particular its radially inward side, be designed for attachment to a shaft. In this case, it is possible for the inner diameter of the annular elastic element and / or the inner diameter of the outer running disks to abut against the radially outward side of the section of the sleeve extending between the radial edges. The inner running disk can be designed for mounting in a bearing seat, for example in a housing.

In particular, it may be between the Radialborden, in particular axially extending portion of the sleeve, in particular its radially inward side, in particular with arbitrary internal geometry, for example, inter alia, with cylindrical inner geometry, designed for a press fit on a shaft or serve for its formation. The inner running disk can be designed for a press fit in a bearing seat, for example in a housing, in particular with any desired internal geometry, for example, inter alia, with a cylindrical inner geometry, or serve for its formation.

The bearing according to the invention can be used for example in a, in particular electrical, drive arrangement for, in particular motor, actuation of a functional element, for example a flap or door, for example a tailgate, in a motor vehicle. For example, the bearing in a in the publication DE 20 2005 016 953 U1 described drive assembly, in particular instead of the bearing block, are used.

Another object is a, for example, electrical, drive arrangement for, in particular motor, actuation of a functional element, for example a flap or door, for example a tailgate, in a motor vehicle, which comprises a bearing according to the invention. In particular, the drive arrangement may be a tailgate drive, for example an electric tailgate drive.

Short description of the drawing

The invention will now be described by way of example with reference to the accompanying drawings with reference to preferred embodiments, wherein the features shown below, both individually and in combination may represent an aspect of the invention. Show it:

1 a schematic cross section through an embodiment of an axial ball bearing according to the invention with an outer sleeve;

2 a schematic cross section through an embodiment of an angular contact ball bearing according to the invention with an outer sleeve;

3 a schematic cross section through an embodiment of an axial ball bearing according to the invention with an inner sleeve; and

4 a schematic cross section through an embodiment of an axial ball bearing according to the invention with an outer sleeve equipped with an outer race.

Detailed description of the drawing

The 1 to 4 show double-acting axial deep groove ball bearings or angular contact ball bearings, each two in the two axial sides of an inner (axial) running disk 1 integrated inner grooves 10 . 11 , two outer grooves 12 . 13 and two rows 4 . 5 in the inner grooves 10 . 11 and outer grooves 12 . 13 circumferentially arranged bearing balls 4a . 5a exhibit. In this case, at least one of the outer grooves 12 . 13 in the inner axial side of an outer (axial) running disk 2 . 3 incorporated

The 1 to 4 show that the bearings continue doing an axial bilateral with radial rims 6a . 6b trained sleeve 6 have, in which an elastic element 7 is used in the form of a plastic ring made of an elastomeric material. The sleeve 6 is in particular designed so that they all the individual parts 1 . 2 . 3 . 4a . 5a . 7 holds the bearing and can be pressed over its outer diameter or pressed over its inner diameter.

The 1 to 4 illustrate that the running wheels 1 . 2 . 3 thereby from the Radialborden 6a . 6b the sleeve 6 enclosed or axially between them 6a . 6b are arranged. Between the radial shelves 6a . 6b it extends an axial section 6c the sleeve 6 ,

The 1 to 4 illustrate that through the sleeve 6 an axial fixation of the pulleys 1 . 2 . 3 and encapsulation of the bearing can be effected. Through the plastic ring 7 the bearing is preloaded without play. Overall, it is thus advantageously possible to provide an axial ball bearing or angular contact ball bearing which can be pressed onto a shaft as a preassembled structural unit or pressed into a bearing seat.

As part of the in the 1 . 2 and 4 shown embodiments, the sleeve 6 designed as an outer sleeve whose 6 between the radial shelves 6a . 6b extending axial section 6c the outer diameter of the inner disk 1 , the outer rotor disk / n 2 . 3 and the plastic ring 7 encloses from outside. Here, the radially outward side or the outer diameter L is between the Radialborden 6a . 6b axial, extending sleeve portion 6c for forming a press fit in a bearing seat, for example in a housing designed. The inner running disk 1 is a wave washer, the radially inward side or inner diameter W is designed to form a press fit on a shaft with a rotation axis R.

As part of the in 2 the embodiment shown is the sleeve 6 designed as an inner sleeve whose 6 between the radial shelves 6a . 6b extending axial section 6c the inner diameter of the inner disk 1 , the outer rotor disk / n 2 . 3 and the plastic ring 7 enclosing from inside. Here, the radially inner side or the inner diameter W of which is between the Radialborden 6a . 6b axial, extending sleeve portion 6c designed to form a press fit on a shaft with a rotation axis R. The radially outward side or the outer diameter L of the inner running disk 1 is outside diameter L of the inner sheave 1 is designed to form a press fit in a bearing seat, for example in a housing.

In the in 1 As shown embodiment, the bearing is designed as a double-acting axial ball bearing, which has an inner running disk 1 with incorporated in both Axialseiten inner grooves 10 . 11 , two outer discs 2 . 3 with in the inner axial sides incorporated outer grooves 12 . 13 as well as two rows 4 . 5 from between the inner rotor 1 and the outer discs 2 . 3 in the inner and outer grooves 10 . 11 . 12 . 13 encircling bearing balls 4a . 5a , The outer running disks 2 . 3 and especially the ones in between 2 . 3 arranged inner running disk 1 are doing of an axial on both sides with Radialborden 6a . 6b trained sleeve 6 enclosed in the 6 on one side a plastic ring 7 is used.

This is one of the outer discs 3 , especially with her 3 outer axial side, on one of the radial rims 6b , especially at the 6b inner axial side, on. For this outer race 3 serves this radial board 6b both as normal and high bearing loads as a bearing surface.

The other outer running disk 2 lies with it, especially with her 2 outer axial side, on the plastic ring 7 , especially his 7 inner axial surface, on. The plastic ring 7 lies in turn, especially with his 7 outer axial side, at the other Radialbord 6a , especially at the 6a inner axial side, on. This radial board 6a has an inwardly curved end portion, which is connected to a non-curved Radialbordabschnitt and a portion of the adjacent thereto between the Radialborden 6a . 6b extending axial sleeve section 6c a receptacle for the plastic ring 7 formed. On the other hand serves the inwardly curved end portion of the radial flange 6a at high loads acting on the bearing as an attachment point or contact surface for the on the plastic ring 7 fitting outer running disk 2 , thereby advantageously overloading outer race 2 , whereby advantageously an overload of the plastic ring 7 can be prevented at high loads.

In the in 1 embodiment shown are the bearing ball rows 4 . 5 each between the inner disk 1 and one of the outer pulleys 2 . 3 arranged. Here are the bearing ball rows 4 . 5 each in one of the inner grooves 10 . 11 the inner running disk 1 and in one of the outer raceways 12 . 13 the outer pulleys 2 . 3 arranged.

The as part of 2 The embodiment shown differs essentially from that in FIG 1 shown embodiment that the bearing is an angular contact ball bearing. Unlike the in 1 shown embodiment, no curved Radialbord end portion is provided, which at high loads as a contact point or contact surface for an outer race 2 serves. Instead, the sleeve points 6 one to the plastic ring 7 adjacent undercut, in which the plastic ring 7 at high loads acting on the bearing into it and thus can be protected against overload.

The as part of 3 The embodiment shown differs essentially from that in FIG 1 shown embodiment that the sleeve 6 - As explained above - as an inner sleeve with radially outwardly formed Radialborden 6a . 6b is trained.

The as part of 4 shown embodiment differs on the one hand by the in 1 shown embodiment that the bearing only an outer disk 2 . 7 with an outer raceway 12 has, whose 2 . 7 Outer Axialseite also directly on the inner axial side of a Radialbordes 6a rests and which also serves as an elastic element. On the other hand, the differs in the context of 4 shown embodiment of the in 1 shown embodiment that the second outer race 13 into the inner axial side of the other radial flange 6b is incorporated. Here is the one camp ball rows 4 between the outer rotor 2 and one axial side of the inner race 1 and the other camp ball rows 5 between the other axial side of the inner race 1 and with the outer raceway 13 provided radial board 6b arranged.

LIST OF REFERENCE NUMBERS

1

 inner running disk, in particular shaft or running disk

2, 3

 outer rotor

4, 5

 Bearing ball row

4a, 5a

 bearing ball

6

 shell

6a, 6b

 radial board

6c

 between Radialborden trained sleeve section

7

 elastic element, in particular plastic ring

10, 11

 Inner grooves

12, 13

 Outer grooves

R

 axis of rotation

W

 Surface for a press fit on a shaft

L

 Surface for a press fit in a bearing seat

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 402575 [0003]
• DE 202005020084 U1 [0004]
• DE 202005016953 U1 [0005, 0037]

Claims (10)

Axial or angular contact ball bearings, comprising two inner grooves ( 10 . 11 ), which in the two axial sides of an inner running disc ( 1 ), two outer grooves ( 12 . 13 ), at least one of which into an inner axial side of an outer race ( 2 . 3 ) and two rows ( 4 . 5 ) of in the inner grooves ( 10 . 11 ) and outer grooves ( 12 . 13 ) circumferentially arranged bearing balls ( 4a . 5a ), wherein the bearing continues to have an axial on both sides with radial rims ( 6a . 6b ) formed sleeve ( 6 ), wherein in the sleeve ( 6 ) an elastic element ( 7 ) is inserted, and wherein the running discs ( 1 . 2 . 3 ) from the radial shelves ( 6a . 6b ) of the sleeve ( 6 ) are enclosed. Bearing according to claim 1, wherein the elastic element ( 7 ) is an at least in the axial direction elastically acting element. Bearing according to claim 1 or 2, wherein the elastic element is annular, in particular as a plastic ring or plate spring is formed. Bearing according to one of claims 1 to 3, wherein the bearing has two outer discs ( 2 . 3 ), wherein the outer grooves ( 12 . 13 ) in each case in the inner axial sides of the two outer running discs ( 2 . 3 ) are incorporated. Bearing according to one of claims 1 to 4, wherein one of the outer grooves ( 12 ) in an inner axial side of the elastic element ( 7 ) is incorporated. Bearing according to one of claims 1 to 5, wherein one of the outer running disc ( 2 ) also as an elastic element ( 7 ) serves. Bearing according to one of claims 1 to 6, wherein one of the outer grooves ( 13 ) into the inner axial side of a radial flange ( 6b ) is incorporated. Bearing according to one of claims 1 to 7, wherein the sleeve ( 6 ) an outer sleeve with radially inwardly formed Radialborden ( 6a . 6b ) one being between the radial shelves ( 6a . 6b ) extending section ( 6c ) of the sleeve ( 6 ) is designed for fastening in a bearing seat and wherein the inner running disc ( 1 ) is a wave washer for mounting on a shaft. Bearing according to one of claims 1 to 7, wherein sleeve ( 6 ) an inner sleeve with radially outwardly formed Radialborden ( 6a . 6b ), wherein between the radial rims ( 6a . 6b ) extending section ( 6c ) of the sleeve ( 6 ) is designed for attachment to a shaft and wherein the inner running disc ( 1 ) is designed for attachment in a bearing seat. Drive arrangement for actuating a functional element in a motor vehicle, in particular an electric tailgate drive, comprising a bearing according to one of claims 1 to 9.

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