WO2015154759A1

WO2015154759A1 - Segment bearing arrangement with frictional connection

Info

Publication number: WO2015154759A1
Application number: PCT/DE2015/200052
Authority: WO
Inventors: Johannes Lang; Alexander Stark; Andre Anger
Original assignee: Schaeffler Technologies AG & Co. KG
Priority date: 2014-04-09
Filing date: 2015-01-30
Publication date: 2015-10-15
Also published as: DE102014206805A1; CN106133347A; EP3129666A1; CN106133347B

Abstract

Segment bearings together with rolling bearings which allow a rotational movement, i.e. a rotation by more than 360 degrees, are used for pivoting movements. The aim of the invention is to provide a segment bearing arrangement which can be easily assembled. For this purpose, a segment bearing arrangement (1) is proposed, comprising a cage (2); a plurality of rollers (4), said rollers (4) being arranged in the cage (2); and a partial bearing shell (3) as a track support for the rollers (4), said cage (2) together with the rollers (4) being arranged on the partial bearing shell (3) in a pivotal manner in a circumferential direction relative to a main axis, wherein the bearing part shell (3) has side pieces (6) for axially guiding the cage (2). The cage (2) is secured to the lateral pieces (6) via a frictional connection (11) so as to be prevented from falling out radially in the direction of the main axis.

Description

Name of the invention

Segment bearing arrangement with frictional connection

description

The invention relates to a segment bearing arrangement with the features of the preamble of claim 1. Rolling bearings have in many designs an outer ring, an inner ring and rollers arranged therebetween rolling elements, so that the rings can rotate to each other. In addition to rolling bearings, which allow such a rotational movement, ie a rotation of more than 360 degrees, so-called segment bearings are used for pivotal movements. Such segment bearings usually extend over an angular range about their pivot axis, which is formed smaller than 360 degrees.

The published patent application DE 10 2005 034 739 A1, which is probably the closest prior art, discloses a mounting of a pivotable lever, wherein the lever is supported relative to a surrounding structure via a segment bearing. The segment bearing comprises an outer and an inner bearing half shell, between which rollers are arranged in a cage. The bearing shells are permanently connected to each other. Field of the invention

It is an object of the present invention to provide a segment bearing assembly which can be easily assembled. This object is achieved by a segment 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.

The object of the invention relates to a segment bearing arrangement, which is designed in particular as a radial bearing arrangement. The segment bearing assembly allows a relative pivoting of two bearing partners about a pivot axis as a major axis of the segment bearing assembly. The segment bearing arrangement extends around the main axis by an angular range of less than 360 degrees, in particular less than 180 degrees.

The segment bearing has a cage and a plurality of rollers, wherein the rollers are arranged in the cage. In a preferred embodiment of the invention, the rollers are designed as needle rollers. In the preferred embodiment, the needle rollers 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. The rollers, in particular needle rollers, are arranged in one or more rows in the cage.

The segment bearing arrangement has a bearing part shell, which comprises a raceway for the rollers as the raceway carrier. In operation, the rollers roll on the track of the bearing part shell, so that the roller-filled cage is pivotally mounted on the bearing part shell about the main axis in the direction of rotation by a pivot angle. Particularly preferably extends the bearing part shell in the circumferential direction about the main axis over an angular range, which is smaller than 360 degrees, in particular less than 180 degrees, is formed. The bearing part shell has side walls, which are designed for axial guidance of the cage. Particularly preferably, the bearing part shell is formed as a metal and / or sheet metal shell. In particular, the bearing part shell is realized as a forming part. In this preferred embodiment, the side walls are realized as deformed metal sections, in particular forming or flange shelves. The side rims preferably extend in a plane that is perpendicular to the main axis. In normal operation, the cage can run in the axial direction on the side rims, so that the cage is guided by the side rims.

In the context of the invention it is proposed that the cage is secured against radial falling out in the direction of the main axis, namely by the cage enters into a frictional connection with the side rims. The frictional connection between the cage and side shelves thus ensures that the segment bearing assembly can not disintegrate during assembly.

It is an idea of the invention that an assembly of the segment bearing assembly in a surrounding construction is also made difficult by the fact that due to the non-continuous bearing part shell in the circumferential direction of the cage accidentally fall out of the bearing shell part. This is a hindrance in a final assembly, because although possibly the bearing shell part can be set in the surrounding construction, but the cage is first fixed by a bearing partner in the working position. For a remedy, the invention proposes that the cage enters into a frictional connection with the side rims, so that it can not fall out due to the frictional engagement. By the Frictional connection is thus ensured that in the final assembly of the cage always remains in the mounted position in the bearing part shell. In this way, the final assembly is simplified and also prevents assembly errors.

In a preferred embodiment of the invention it is provided that the cage in the bearing part shell, in particular between the side rims, is clamped in the axial direction to form the frictional connection. In a preferred structural embodiment of the invention, the cage in the bearing part shell, in particular between the side rims in a radial plan view in an interference fit, in particular in an interference fit, arranged. There is thus an overlap between the cage and the bearing shell, in particular the side rims of the bearing shell. The press-fit of the clamped state or the frictional connection is formed. In an initial assembly of the cage with the rollers can be easily inserted into the bearing part shell, in particular pressed, and there is sufficiently secured by the frictional connection for transport and final assembly.

In a preferred embodiment of the invention, the cage has at least one frictional engagement element, wherein the frictional engagement element is frictionally supported on at least one of the side walls. Particularly preferably, the cage has such Reibschlussorgane on both axial sides. The one or more frictional elements widen the cage in the axial direction, so that the frictional connection between the cage and side shelves takes place.

In a preferred realization of the invention, the frictional engagement elements are designed as wear elements, wherein it is provided that the frictional engagement elements grind off during a relative movement between the cage and the bearing part shell, in particular the side walls other way, so that the cage is released for a particular low-friction operation. Thus, the cage is used with the Reibschlussorganen in the bearing part shell and the segment bearing assembly used for example in a surrounding construction for final assembly. In operation, it is usually disadvantageous if the cage is frictionally held in the bearing part shell. For this reason, the Reibschlussorgane as wear organs constructive and / or material technology are designed so that they separate automatically from the body of the cage in a relative movement between bearing shell and cage, in particular abrade, and thereby wear. Consequently, the Reibschlussorgane be separated during operation of the body and the cage can be moved without friction in the bearing part shell friction. In a possible embodiment of the invention, the frictional engagement elements are formed from a plastic. The plastic has the advantage that it can wear out during a relative movement between the cage and bearing shell part over time and thus can separate. It can be provided that the Reibschlussorgane are fixed to the side rims. In an alternative and at the same time preferred embodiment of the invention, the Reibschlussorgane are attached to the cage, in particular integrally formed. It is particularly preferred that the cage is realized with the Reibschlussorganen as a plastic cage. In this embodiment, the Reibschlussorgane can be taken into account in the design of the tool for the plastic cage, so that they can be formed without additional costs to the cage. The Reibschlussorgane are formed for example as nubs, which extend away in the axial direction of side ring portions of the cage and abut with their free ends on the side rims.

In addition to securing against falling out in the radial direction by the frictional connection is preferably provided that the Segment bearing assembly has end stop devices, wherein the end stop means are designed for positive locking against falling out of the cage in the direction of rotation. In a preferred embodiment of the invention, the rollers are positively secured in the cage in the direction of the main axis of the cage. At least in the assembled state of cage and bearing shell part, the rollers are captively caught in the cage. By securing the cage to the bearing part shell is achieved in that neither the cage nor the rollers can fall out during transport or during assembly.

In a further development of the invention, it is preferred that the rollers in the cage by the cage captive, in particular self-holding, are arranged. Thus, the rollers are captively secured in the cage without bearing shell. Specifically, the plurality of rollers are held in the cage in all directions, in particular radially inwardly, radially outwardly and axially positively in both directions by the cage. In this embodiment, the roller-filled cage forms a self-retaining subassembly assembly, wherein accidental loss of individual roles during assembly to the preassembly assembly for segment bearing assembly or in the final assembly is excluded.

In a preferred embodiment of the invention, the cage is designed as a Filigrankäfig. In a Filigrankäfig a single shot is provided for each of the roles. The cage thus has a plurality of individual receptacles, wherein in each case a single role is arranged in the individual receptacles. The cage may be formed in one or more rows to accommodate one or more rows of rollers. Particularly preferably, the rollers in the cage are full-roll - also called vollnadelig - arranged. In a full complement arrangement, the rollers are preferably placed close to one another in the direction of rotation about the main axis, 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 segment 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 cage is formed as the plastic cage. The plastic cage can be implemented in several parts and, for example, have two cage part shells, which together form the plastic cage, with a cage of the plastic cage, the cage halves are initially separated, the rollers are inserted and subsequently the cage halves are connected to each other to hold the rollers captive , The connection of the cage part halves can be positive, cohesive and / or non-positive. In an alternative embodiment, the plastic cage can also be formed in one piece or in one piece, wherein webs or other holding members in the plastic cage to form the individual receptacles and to secure the rollers in the plastic cage in the radial direction are elastic, so that the rollers can be pressed into the plastic cage , wherein the webs or retaining members are elastically deformed when pressed.

In a preferred embodiment of the invention, the segment bearing arrangement is designed as a pivot lever arrangement, in particular with a Zugspannhebel for a brake or for a stabilizing rod of a hydraulic unit. The pivot lever assembly includes a pivot lever, wherein the pivot lever is mounted on the roller-filled cage. Especially 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 shows a segment bearing arrangement in three-dimensional representation as an embodiment of the invention.

1 shows a schematic three-dimensional representation of a segment bearing arrangement 1 as an embodiment of the invention. The segment bearing assembly 1 is formed as a radial bearing. It extends over less than 360 degrees and is limited as a segment bearing in this example to an angular range about a major axis of the segment bearing assembly 1 of less than 180 degrees. In particular, the segment bearing arrangement 1 is designed to pivot two bearing partners to each other about the main axis.

The segment bearing arrangement 1 has a plastic cage 2 and a bearing part shell 3. In the plastic cage 2, a plurality of rollers 4 formed as needle rollers is arranged. The roll-filled plastic cage 2 can be pivoted in the bearing part shell 3 in the direction of rotation about the main axis by a pivot angle by rolling the rollers 4 on a raceway 5 of the bearing part shell 3 and the plastic cage 2 moves by a pivoting S in the bearing part shell 3. In particular, the raceway 5 forms a straight cylinder jacket surface whose central axis lies on the main axis.

The bearing part shell 3 is formed in this example as a bearing half shell and as a metal component, in particular as a metal forming part realized. The bearing part shell 3 has on the axial sides in each case a side board 6, which leads the plastic cage 2 in the axial direction and at the same time secures against falling out. At the free ends of the bearing part shell 3 in the circumferential direction end stop means 7 are formed in the form of radially inwardly bent end stops 8 in the form of tab sections which limit the pivoting S and thus the pivot angle in the direction of rotation on both sides, so that the plastic cage 2 in the circumferential direction about the main axis form-fitting is secured.

The plastic cage 2 is designed to hold the rollers 4 captive. For this purpose, the plastic cage 2 has individual receptacles 9, in each of which a roller 4 is arranged. The individual receptacles 9 are bounded in the radial direction inwards to the main axis by stub stubs 10, which extend in the axial direction only over a partial section of the rollers 4. The plastic cage 2 keeps the rollers 4 captive even without the bearing part shell 3, wherein on the radial outer side (not shown) further web stub or even continuous webs are arranged so that the rollers are secured in the radial direction inwardly by the stub shaft 10 positively against falling out and are secured in the direction radially outward by the stub stems or webs, not shown against falling out in the radial direction to the outside. The web stub 10 have the advantage that the rollers 4 can be pressed in the plastic cage 2 by an elastic deformation of the web stub 10 and thereby inserted. Against this background, it is also possible that the plastic cage 2 has webs on the shown front side and has the web stub on its rear side, so that the plastic cage 2 is equipped by the rear side. In alternative embodiments, the plastic cage 2, as shown, not one piece, in particular in one piece, be formed, but for example, consist of two shells, with an inner and an outer part shell can be connected to each other. In this embodiment, the rollers are 4 first inserted into one of the partial shells and then secured by placing the other partial shell. The two partial shells can be positively, non-positively and / or materially connected to each other. The individual receptacles 9 are realized in this embodiment by the interaction of the two partial shells.

As already explained, the plastic cage 2 is secured in the bearing part shell 3 with respect to the direction of rotation by the Endanschlageinrichtungen 7 and in the axial direction by the side rims 6 positively against falling out or retracting.

For securing against falling out of the plastic cage 2 in the radial direction of the plastic cage 2 is secured in the bearing part shell 3 via a frictional connection. In particular, the cage 2 is clamped in the bearing part shell 3 in the axial direction with respect to the main axis or pivot axis. For this purpose, 2 Reibschlussorgane 1 1 are formed in the form of nubs on the axial side surfaces of the plastic cage, with two studs 1 1 are arranged on each side of the plastic cage 2 and wherein the respective opposing studs 1 1 are attached to the same axial position. The knobs 1 1 can be made together with the plastic cage 2, in particular, the studs 1 1 formed integrally with the plastic cage 2. The nubs 1 1 are made in a press fit, that is, this or the plastic cage 2 is compressed in the axial direction to the main axis. In the relaxed state, the axial width of the cage in the region of the studs 1 1 would be greater than the axial clearance between the side walls 6. By clamping the plastic cage 2 with the knobs 1 1, the frictional connection is generated, which ensures that the plastic cage 2 is not in radial direction can fall out. In addition, it is achieved by the frictional connection that the plastic cage 2 can not be moved in the direction of rotation. The press fit used, as shown in Figure 1, represents a mounting state of the segment bearing assembly 1. After the final assembly in a surrounding construction is achieved in further operation by pivoting the plastic cage 2 along the pivoting path S, that the studs 1 1 through Abrasion friction on the side walls 6 and thus the frictional connection is dissolved during operation. Thus, the frictional connection represents a transport and / or mounting backup for the segment bearing assembly. The frictional connection is designed to be self-resolving during operation, so that after some operating time no functional disadvantages due to the frictional connection remain.

LIST OF REFERENCE NUMBERS

I Segment bearing arrangement

2 plastic cage

3 bearing shell

4 rolls

6 side shelves

7 End stop device

8 end stop

9 single shot

10 bridge stubs

I pimples

5 pivoting path

Claims

claims

1 . Segment bearing arrangement (1) with a cage (2), with a plurality of rollers (4), wherein the rollers (4) in the cage (2) are arranged, with a bearing part shell (3) as a raceway carrier for the rollers (4), wherein the cage (2) with the rollers (4) on the bearing part shell (3) with respect to a main axis in the direction of rotation is pivotally mounted, wherein the bearing part shell (3) has side rims (6) for the axial guidance of the cage (2), characterized in that the cage (2) is secured against radial fall-out in the direction of the main axis on the side boards (6) via a frictional connection (1 1).

Second segment bearing assembly (1) according to claim 1, characterized in that the cage (2) in the bearing part shell (3) is clamped in the axial direction.

3. segment bearing assembly (1) according to claim 1 or 2, characterized in that the cage (2) in the bearing part shell (3) is arranged in a press fit.

4. Segment bearing arrangement (1) according to one of the preceding claims, characterized in that the cage (2) has at least one Reibschlussorgane (22), wherein the at least one Reibschlussorgan (1 1) on at least one of the side rims (3) are frictionally supported.

5. segment bearing assembly (1) according to claim 4, characterized in that the Reibschlussorgane (1 1) are formed of a plastic.

6. segment bearing assembly (1) according to any one of the preceding claims, characterized in that the cage (2) as a plastic cage (2) is formed.

7. Segment bearing arrangement (1) according to one of the preceding claims, characterized in that the rollers (4) in the cage (2) are arranged captive.

8. segment bearing assembly (1) according to any one of the preceding claims, characterized in that the rollers (4) are designed as needle rollers.

9. segment bearing assembly (1) according to any one of the preceding claims, characterized in that the rollers (4) in the cage (2) are held individually and arranged full complement.

10. Segment bearing arrangement (1) according to one of the preceding claims, characterized in that this (1) is designed as a pivot lever bearing.