DE102014206804B3 - Bearing arrangement with a cage - Google Patents

Abstract

The invention has for its object to propose a bearing assembly, which meets the requirements in terms of assembly, transport and functional properties.
It is a bearing assembly 1 with a cage 2, with a plurality of rollers 3, wherein the rollers 3 are arranged captive in the cage 2, wherein the cage 2 a receiving portion 7 for inserting the rollers and at least one locking member 6 for locking the receiving portion. 7 has, wherein the receiving portion 7 and the at least one locking part 6 are interconnected.

Description

The invention relates to a bearing arrangement with a cage and with a plurality of rollers, wherein the rollers are arranged captive in the cage.

Rolling bearings generally have a plurality of rolling elements over which two bearing partners can roll to each other. Due to the large number of rolling elements in a rolling bearing, the requirement already arises during assembly of mounting a correct number of rolling elements in the rolling bearing. This requirement can be simplified, for example, in the use of cages with individual receptacles for the rolling elements, since it can be controlled in a fairly simple manner, whether each individual receptacle is filled with a rolling element. Further requirements arise in the transport of rolling bearings, since in the event that the rolling elements are not arranged self-holding or captive in the rolling bearing, they can fall out. After the number of rolling elements is no longer checked in the final assembly of rolling bearings, falling out of rolling elements can lead to incorrect assembly.

The publication DE 967 539 B describes a needle bearing for oscillating movements with individually held and guided in a plastic cage needles. The special feature of this needle roller bearing is that the needles in the plastic cage are fully guided. This is implemented in this document by the fact that the plastic cage is made of a resilient plastic material, wherein the needles can be pressed into the elastic plastic cage.

The publication WO 2004/010015 A1 relates to a radial roller bearing with a cage, the cage having a cage nest and a cage finger ring. In the cage nest cylindrical rollers can be inserted and secured with the cage finger ring, so that the cylindrical rollers are taken captive in spaced pockets of the cage.

The publication FR 2 307 177 A1 also relates to a cage for a conventional radial rolling bearing, wherein the cage also provides pockets in which rollers can be accommodated as rolling elements spaced from each other.

The publication DE 10 2009 034 018 A1 discloses a cage for a radial rolling bearing, wherein rollers are held in the cage and spaced apart by plastic inserts.

The publication DE 3 821 037 A1 shows an endless belt cage, wherein portions of the endless belt cage can be inserted into each other.

The publication JP 2009 047275 A relates to a segment bearing, which has a bearing shell and a plurality of rollers, which are separated in a cage by web portions from each other. The cage is secured by a hold-down, the hold-down is clipped into the bearing shell.

The publication DE 10 2005 054 082 A1 relates to a cage for a rolling bearing, wherein the cage can also be used for a pivot bearing. The cage has segments in which rollers are arranged and which are arranged displaceable relative to each other. The segments are linked together or secured by a hold-down, which is attached to the bearing ring.

The publication DE 10 2005 034 739 A1 describes a bearing of a pivotable lever in a pivot bearing, with a plurality of rollers, wherein the rollers are arranged in a cage full complement.

The publication EP 2 159 436 A1 , which forms the closest prior art, shows a segment bearing with a bearing shell and a cage, wherein in the cage rollers are arranged as rolling elements captive and full complement. The publication EP 2 312 173 A1 shows a similar segment storage as the publication EP 2 159 436 A1 ,

Field of the invention

The invention has for its object to propose a bearing assembly, which meets the requirements in terms of assembly, transport and functional properties.

This object is achieved by a bearing arrangement with the features of claim 1. Preferred or advantageous embodiments of the invention will become apparent from the dependent claims, the following description and the accompanying drawings.

In the context of the invention, a bearing arrangement is proposed which is designed in particular as a radial bearing arrangement. In particular, the bearing assembly defines a pivot or rotation axis - called the main axis - called.

The bearing assembly comprises a cage and a plurality of rollers, wherein the rollers in the cage captive, in particular self-holding, are arranged. In particular, the majority of Rolls in the cage in all directions, in particular radially inwardly, held radially outwardly and axially in both directions positively by the cage. The cage has a plurality of receptacles, in particular individual receptacles or double receptacles, wherein in each case a single roller and in the double receptacles each two rollers is or are arranged in the individual receptacles. The cage can be formed in one or more rows.

In the context of the invention it is proposed that the cage consists of at least two separate components. One of the components is formed by a receiving portion, which is designed for insertion of the rollers. In particular, the receiving section makes it possible to insert the rollers into or onto the receiving section in a pre-assembled state. The receiving portion may be formed in several parts, but particularly preferably the receiving portion is made in one piece. In particular, the receiving portion is adapted to receive all the roles of the cage. It is preferably provided that the rollers are held in the receiving portion without the at least one locking part losierbar, so that they can be inserted in a simple manner.

Furthermore, the cage comprises as a further component or components at least one locking part, which is designed to lock the receiving portion. The locking takes place such that by locking the receiving portion by the at least one locking member, the rollers are arranged captive in the cage.

The receiving portion and the at least one locking part are connected together in the locked state. Particularly preferably, the receiving portion and the at least one locking part are positively connected to each other. Optionally, in addition to the positive connection, the receiving portion and the at least one locking member may be connected to each other cohesively and / or non-positively. However, it is also possible that receiving portion and the at least one locking member are connected to each other only form-fitting manner. In particular, the at least one locking part and the receiving portion together form a plug-in arrangement. In modified embodiments, the receiving portion may also be cohesively, in particular via welding or gluing, and / or non-positively connected to each other.

While in the known state of the art, the plastic cage must be designed to be elastic in order to enable a recording of roles, the invention proposes that the cage is formed in several parts and can be assembled via at least one subsequent connection to the cage. This embodiment has the advantage that not only an elastic plastic, which allows the rollers to be pressed into the cage, but also any material, thus a metal or a plastic, in particular a hard or rigid plastic, can be used as base material for the cage , The use of a hard or rigid plastic thus represents a preferred embodiment of the invention. In particular, the cage is rigid and / or dimensionally stable. The plastic cage in the preferred embodiment or its components, comprising the receiving portion and the at least one locking part, are easy and inexpensive to produce, for example by a plastic injection molding process. The fact that the receiving section allows insertion of the rollers, a secure and complete installation is possible. Locking with the at least one locking part ensures that no rolls can be lost even during subsequent transport. Ultimately, there are also functional advantages, since the cage - in contrast to the prior art - can be made of a hard material and / or rigid, so that the cage during operation of the bearing assembly can not be deformed in a simple manner.

According to the rollers in the cage are full-roll - also called vollnadelig - arranged. In a full complement arrangement, the rollers in the direction of rotation about the main axis are preferably placed so close together that a maximum number of rollers can be arranged in the direction of rotation. In particular, the sum of all free distances in the direction of rotation is smaller than the diameter of a roll in the direction of rotation. Due to the full complement arrangement, the largest possible radial load capacity of the bearing arrangement is achieved while at the same time saving space. The rollers each have their own axis of rotation, wherein the totality of the axes of rotation defines a pitch circle diameter of the rollers. In particular, in the pitch diameter, the rollers are immediately adjacent to each other, in particular full complement, arranged.

In a preferred embodiment of the invention, the rollers are designed as needle rollers. The needles have a length-to-diameter ratio which is preferably greater than 4: 1, preferably greater than 6: 1 and in particular greater than 8: 1. Alternatively or additionally, needles are defined as needles which have a diameter of less than or equal to 5 mm. Especially with needles as rollers, it is unusual to arrange them in full complement arrangement in a cage. In a preferred embodiment of the invention, the cage is designed as a Filigrankäfig. At a Filigrankäfig is provided for each of the needle rollers a single shot.

According to the invention, the cage is designed as a segment cage. The cage extends over an angular range which is less than 360 degrees, in particular less than 270 degrees, in particular less than or equal to 180 degrees. Such segment cages are particularly preferably used in bearing arrangements for oscillating movements or pivoting movements. According to the invention, the bearing arrangement is designed as a segment bearing, so that it extends in the direction of rotation over an angular range of less than 360 degrees, in particular less than 270 degrees and in particular less than or equal to 180 degrees. Especially with the segment cages or segment bearings, the loss of individual rolling elements, especially rollers, is particularly dangerous because the segment cages may tend to pivot in the direction of rotation relative to shells so that the rolling elements can fall out. The inventive design as a captive cage ensures even with segment cages or segment bearings that no roles can be lost.

In a preferred structural embodiment of the invention, the receiving portion is formed as a cage outer shell and the at least one locking part as a cage inner shell. Cage outer shell and inner cage shell are arranged offset to each other in the radial direction to the main axis. In particular, the inner cage shell and the cage outer shell are arranged coaxially and / or concentrically with each other and / or to the main axis. The cage outer shell know holding members for positive securing of the needle rollers from falling out radially outwards. By contrast, the inner part of the cage shell has holding members for the positive securing of the rollers from falling out radially inwards. Furthermore, the cage outer shell part allows insertion of the rollers in the areas between the holding members, so that a filling of the cage outer shell with rollers is simplified. Due to the positive connection of cage outer shell and cage inner shell, the roles between cage outer shell and cage inner shell are captured captive. Preferably, the cage outer shell part additionally has an axial securing, such as a side ring section on. Alternatively, the side ring portion may also be formed in the inner cage shell.

In constructive realizations of the invention, the holding members may be formed, for example, as continuous webs or web portions. In training as a continuous stand, these have the advantage that they reinforce the cage outer shell and the inner cage shell part constructively. By contrast, it is also possible that the holding members are designed only as web portions or web stub, wherein the rollers are held only in sections in the longitudinal extent of the role. The webs or web portions may have reduced friction contours. So it is possible, for example, that they occupy a circular cross-section. The holding members are in particular arranged so that the rollers, in particular the needles, are held in full-roll fashion in the cage.

In a particularly preferred embodiment of the invention cage outer shell and cage inner shell are locked or clipped together. In this way, a quick release between cage outer shell and cage inner shell part is created so that after a loading of the cage outer shell, the cage inner shell can be easily plugged and locked or clipped.

In an alternative embodiment of the invention, the receiving portion is formed as a cage outer part shell, which in turn has holding members, in particular in the form of the webs or web portions already described. The receiving portion is thus still adapted to receive the rollers for pre-assembly. Alternatively, the receiving portion may be formed as a cage inner shell with the holding members. The at least one locking part is formed in several pieces and comprises a plurality of webs which are inserted into the receiving portion. For example, have side ring portions of the receiving portion through openings into which the webs can be inserted to lock the receiving portion.

In a preferred embodiment of the invention, the bearing arrangement has at least one bearing part shell, in particular a sheet metal part shell or a bearing ring, wherein the bearing part shell or the bearing ring carries a raceway for the rollers. Particularly preferably, the bearing part shell is designed as a bearing outer shell.

In a preferred embodiment of the invention, the bearing part shell, in particular the bearing outer shell part are connected to the cage captive. By this development it is achieved that falling out of the cage from the bearing shell z. B. is prevented during transport. Particularly preferably, the cage is pivotally received in the bearing part shell around the main axis, wherein on the one hand by a holding device falling out of the cage in the radial direction to the main axis is positively prevented and on the other hand pivoting out of the cage from the Bearing shell part is positively prevented by Endanschlageinrichtungen. This advantageously forms a ready-to-install, self-holding assembly.

In one possible application, the bearing arrangement is designed as a pivot lever arrangement, in particular with a tension release lever for a brake or for a push rod of a hydraulic unit. The pivot lever assembly includes a pivot lever, wherein the pivot lever is mounted on the roller-filled cage. Particularly preferably, the bearing part shell is arranged stationary in a surrounding construction and the pivot lever is pivotally mounted on the roller-filled cage relative to the surrounding structure. Further features, advantages and effects of the invention will become apparent from the description of a preferred embodiment of the invention and the accompanying figure. Showing:

1 a three-dimensional exploded view of a bearing assembly with a plastic cage as an embodiment of the invention.

The 1 shows a bearing assembly 1 , which is formed as a radial bearing and thereby defines a major axis. The bearing arrangement 1 For example, can be used to support a non-illustrated pivot lever, which can be pivoted on the bearing assembly with respect to a surrounding construction, also not shown.

The bearing arrangement 1 includes a cage 2 , which is formed as a plastic cage, in which in two rows a plurality of needles 3 can be inserted as roles. The needles 3 are each formed as a straight cylinder and have a length in an axial direction, which is more than three times the diameter of the needles 3 is. The needles 3 in the two rows are identical in design. Furthermore, the bearing arrangement comprises an outer bearing part shell 4 which is a career 5 for the needles 3 provides. The bearing arrangement 1 is designed as a segment bearing and is limited to an angular extent of less than 180 degrees. Also the cage 2 is designed as a segment cage.

The cage 2 includes a cage inner shell 6 and a cage outer shell 7 , which have locking connections 8a , B can be positively connected to each other. During assembly, the needles become 3 first into the cage outer shell 7 inserted and in a subsequent step, the inner cage shell 6 pressed on and form-fitting with the cage outer shell 7 locked. In the locked state are the needles 3 in the cage 2 positively held captive.

The cage outer shell 7 has axially on both sides a side ring section 9a , b and a middle ring section 10 on. The side ring sections 9a , b are each with the center ring section 10 over footbridges 11 connected so that arranged in two rows for each needle 3 a single shot 12 through side ring section 9a and middle ring section 10 in the axial direction and by two webs 11 is formed in the direction of rotation. Through the single shots 12 can the needles 3 in the correct number in a simple manner in the cage outer shell 7 be inserted. The distance of the webs 11 in the direction of rotation is chosen so that the needles 3 be held captive in the radial direction outwardly positively. In the axial direction are the needles 3 from falling out through the side ring sections 9a , b or the middle ring section 10 secured.

The cage inner shell 6 has side ring sections in a similar construction 13a , b and a middle ring section 14 on, which in the same way over webs 15 are connected. The bridges 15 are spaced in the direction of rotation such that the needles 3 are positively secured against falling radially inward.

After locking cage outer shell 7 and inner cage shell 6 be for every single needle 3 the receiving pockets 12 formed, wherein in each of the receiving pockets 12 exactly one needle 3 is arranged. In the mounted state are the needles 3 arranged in the direction of rotation so close to each other that they are fully booked or vollnadelig. In particular, the number and distribution of the needles 3 in the direction of rotation chosen so that a pitch circle diameter, which by the axes of rotation of the needles 3 is determined, the total length all the gaps between the needles 3 smaller than the diameter of a needle 3 is. Due to the full complement configuration, a maximum load capacity of the bearing assembly can be 1 to reach. The radial position of the webs 11 respectively. 15 is chosen so that the full complement arrangement is made possible. To reduce the frictional resistance, the webs 11 . 15 be circular in cross-section.

The cage 2 is made of a dimensionally stable and / or rigid plastic, so that the inner cage shell 6 and the cage outer shell 7 to a likewise dimensionally stable and / or bending-resistant cage 2 can be joined together.

The locking connections 8a , b are in relation to the direction of rotation at the free ends of the cage 2 are arranged and each by two positioning sections 17a , b and positioning shots 18a , b formed, wherein the positioning sections 17a , B are aligned radially outward and when locking from the positioning receptacles 18a , B are positively received and thereby the relative position of the cage inner shell 6 to the cage outer shell 7 to ensure. In the middle is a snap tab 19 on the cage inner shell 6 arranged, which in a locking receptacle 20 the cage outer shell shell can engage latching, so cage inner shell 6 and cage outer shell 7 locked together.

The bearing shell 4 can be made of metal or plastic and has side shelves 21a , b on that the cage 2 lead in the axial direction. The pivoting movement of the cage in the direction of rotation is on both sides by end stops 22a , b limited, can start against the Endstegabschnitte which together through Endstegbereiche of the inner cage shell 6 and the cage outer shell 7 be formed. The end stops 22a , b and the Endstegabschnitte together form Endanschlageinrichtungen. The end stops 22a , B are formed as extending in the radial direction tongues of the bearing half-shell.

The advantage of the bearing arrangement 1 For one, that's the needles 3 full roll and captive in the cage 2 held to the other the cage 2 can be easily mounted and also the dimensionally stable cage 2 has good functional properties.

In addition to prevent the cage 2 during assembly or during transport from the bearing shell 4 solves, is the cage 2 in the bearing shell 4 held captive. An escape in the axial direction is already through the side boards 21a , b, in the direction of rotation through the end stops 22a , b prevented. In addition, to prevent falling out in the radial direction of the cage in the bearing shell 4 pivotable, but positively held with respect to the radial direction. These are in the sideboards 21a , b retaining lugs 23 z. In the form of axially towards the cage 2 introduced facing caulking.

The cage inner shell 6 points for each retaining lug 23 a running in the direction of rotation and reset in the axial direction guide section 24 on, which in each case one of the retaining lugs 23 can record. The retaining lugs 23 are in the lead sections 24 positively guided, so that in the way limited movement in the direction of rotation is allowed to fall out of the cage 2 is prevented in the radial direction, however. The retaining lugs 23 and the guide sections 24 are sized so that the cage 2 can be snapped into the bearing shell.

In order to operate the bearing assembly 1 a reset of the cage 2 relative to the bearing half shell 4 to allow in the direction of rotation, the cage points 2 and in this example, the inner cage shell 6 Restoring wings 25 on, at the side ring sections 13a , b are formed and extending in the axial direction over the side rims 21a extend b.

LIST OF REFERENCE NUMBERS

1

bearing arrangement

2

Cage

3

needles

4

Half bearing

5

career

6

Cage inner partial shell

7

Cage outer part shell

8a, b

locking connection

9a, b

Side ring section

10

Center ring section

11

Stege

12

Bags

13a, b

Side ring sections

14

Center ring section

15

Stege

16

empty

17a, b

positioning portions

18a, b

positioning recordings

19

snap tab

20

latching receptacle

21a, b

sideboards

22a, b

end stops

23

retaining lugs

24

guide sections

25

Restoring wings

Claims (8)

Bearing arrangement ( 1 ) with a cage ( 2 ), with the cage ( 2 ) as a segment cage and / or the bearing assembly ( 1 ) is formed as a segment bearing, with a plurality of rollers ( 3 ), where the roles ( 3 ) in the cage ( 2 ) are arranged captive and full complement, characterized in that the cage ( 2 ) a receiving section ( 7 ) for inserting the rollers and at least one locking part ( 6 ) for locking the receiving portion ( 7 ), wherein the receiving section ( 7 ) and the at least one locking part ( 6 ) are interconnected. Bearing arrangement ( 1 ) according to claim 1, characterized in that the rollers ( 3 ) are formed as needle rollers. Bearing arrangement ( 1 ) according to one of the preceding claims, characterized in that the receiving section ( 7 ) as a cage outer shell ( 7 ) and the at least one locking part as a cage inner shell ( 6 ), wherein the cage outer shell ( 7 ) Holding organs ( 11 ) to positive locking of the rollers ( 3 ) falling out radially outward and the inner cage shell ( 6 ) Holding organs ( 15 ) for positive locking of the rollers ( 3 ) from falling out radially inwardly. Bearing arrangement ( 1 ) according to claim 3, characterized in that the holding members as webs ( 11 ; 15 ) or are formed as web portions. Bearing arrangement ( 1 ) according to one of claims 3 or 4, characterized in that the cage outer shell ( 7 ) and the inner cage shell ( 6 ) are locked together or clipped together. Bearing arrangement ( 1 ) according to one of claims 1 or 2, characterized in that the receiving portion as a cage outer shell ( 7 ) or as a cage inner shell ( 6 ) and the at least one locking part as a plurality of webs ( 11 . 15 ) is formed, which are inserted into the receiving portion. Bearing arrangement ( 1 ) according to one of the preceding claims, characterized by a bearing part shell ( 4 ), with the cage ( 2 ) in the bearing part shell ( 4 ) is pivotally and at the same time taken captive. Bearing arrangement ( 1 ) according to one of the preceding claims, characterized as a pivot lever arrangement with a pivoting lever and a surrounding construction, wherein the pivoting lever relative to the surrounding structure via the roller-filled cage ( 2 ) is pivotally mounted.

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