DE102005009980B3 - Antifriction bearing has inner ring along with truncated cone like inner surface, which is limited laterally by first board, second board, and outer ring with retaining segments which stand in interference with inner ring - Google Patents

Abstract

The antifriction bearing has an inner ring (1) along with a truncated cone like inner surface (5) which is limited laterally by the first board (7), second board (10) and the outer ring (2). The retaining segments (4) and the inner ring (1) stand with one another in interference and are fixed in the range of the second board (10) by the rolling member (3) at the inner ring. An independent claim has been included for the assembly unit for the antifriction bearing.

Description

The The invention relates to a rolling bearing and an assembly unit for a rolling bearing.

roller bearing become common with cages equipped for receiving the rolling elements. Especially with rolling bearings with big Dimensions are also cages used, which have multiple cage segments.

A rolling bearing with a segmented cage is for example from the US 2 071 797 known. There is a tapered roller bearing with an inner ring, an outer ring, a series of tapered rollers and spacers between the tapered rollers known. The inner ring has at the ends of its conical raceway rings with annular grooves, wherein one of the rings is removable. The spacers are concave in shape at their sides and have at their ends projections which extend into the grooves of the rings and are slidably guided there.

From the DE 34 04 200 A1 is a tapered roller bearing with a one-piece cage known, in which on the side of the small diameter of the inner ring no shoulder is provided. At an outer peripheral portion on the side of the larger diameter, a shoulder is formed. The cage has radially inwardly bent and tapered projections which engage an engagement portion of the shoulder such that there is no contact with the shoulder during rotation of the bearing.

The DE 37 23 168 C2 also discloses a tapered roller bearing with a one-piece cage. The cage has on the side of its smaller diameter elastic projections. The projections engage with bias behind the small board of the inner ring and support the cage axially.

From the DE 102 46 825 A1 a cage for a rolling bearing is known which has a plurality of circumferentially juxtaposed segments. The segments are made of plastic and each have two circumferentially extending circumferential webs and at least two connecting webs, which connect the two circumferential webs together and form together with the peripheral webs at least one pocket for receiving a rolling element.

From the DE 38 41 629 C2 is a roller bearing with a flexurally elastic cage known which has radially inwardly projecting and radially outwardly projecting projections. The outwardly projecting projections are based on the outer ring. The inwardly projecting projections are based on the inner ring. As a result, the cage is deformed so that its retaining surfaces are made against the rolling elements and in this way the play between the rolling elements and the cage is reduced.

Of the Invention is based on the object, a rolling bearing with a segmented Cage like that form, that equipped with rolling elements cage segments captively fixed on the inner ring of the bearing are.

These Task is solved by the combination of features of claim 1.

The Rolling bearing according to the invention has an inner ring with a truncated cone-shaped inner Running track on the side by a first board and a second Board is limited. Furthermore, the rolling bearing according to the invention, an outer ring with a frustoconical outer raceway. Between the inner raceway and the outer raceway Rolling elements roll off. Furthermore has the rolling bearing according to the invention via cage segments, which are lined up in the circumferential direction and equipped with the rolling elements. The cage segments equipped with the rolling elements are in the area of the first board due to the fact that the cage segments and the inner ring engage each other and in the area the second board by the rolling elements captive fixed on the inner ring.

The Rolling bearing according to the invention has the advantage that with a reasonable effort the assembly of the rolling bearing is greatly facilitated. It is particularly advantageous that fixation by the cage segments only in the area of one of the two borders. Furthermore is it advantageous that a reliable Fixation of the cage segments on Inner ring guaranteed is.

In a preferred embodiment of the Rolling bearing according to the invention indicates the inner raceway in an area adjacent to the first board their minimum and in an area adjacent to the second board their maximum diameter. This has the advantage that the first board during operation of the rolling bearing is not exposed to high loads and thus there is a fixation the cage segments easily possible is.

Of the first board and the second board can be one-piece be formed with the inner ring, since it is within the scope of the invention it is not necessary to make the shelves removable.

Especially it is advantageous if the cage segments the inner ring with mounted outer ring in Do not touch the area of the procedure. That way, you can have negative ones Effects on the operation of the rolling bearing according to the invention can be avoided. In particular, the inner ring in the region of the first board has a in the circumferential direction recess in the projections of the cage segments intervention. The recess is preferably towards the rolling elements open. Accordingly, the projections of the extend cage segments preferably parallel to the axial direction of the rolling elements. Such a geometry is feasible with a comparatively small effort.

Around the attachment of the cage segments on the inner ring, it is advantageous if at least one on the projections the cage segments tuned Recess opens into the depression. About these Recess can the projections the cage segments be easily introduced into the depression. The projections are preferably on circumferentially extending webs of the cage segments educated.

Preferably are the cage segments not connected to each other and thus displaceable relative to each other, so that a deformation and a resulting increased friction and avoided increased wear can be. To the number of cage segments not too big to let, can these each be equipped with several rolling elements. The handling of the cage segments equipped with rolling elements can be facilitated by the rolling elements of the cage segments be kept captive. In particular, the rolling elements in receiving pockets of the cage segments be arranged. The receiving pockets allow a secure recording the rolling elements and a reliable one guide the cage segments at the rolling elements. In the receiving pockets can Guide surfaces for guide the cage segments formed on the rolling elements be. about These guide surfaces can be the management relations precise be predetermined and thereby meets high quality requirements and a long life can be achieved. Particularly inexpensive it when the cage segments are made of plastic. This still has the advantage of a relatively low weight of the cage segments and allows a big Variety of shapes.

The Rolling bearing according to the invention can be formed multi-row. In particular, it is considered a tapered roller bearing educated.

The The invention further relates to a mounting unit for a rolling bearing. The assembly unit according to the invention has an inner ring with a truncated cone-shaped inner Running track on the side by a first board and a second Board is limited. Furthermore, the assembly unit according to the invention Rolling on, which roll on the inner track and cage segments, which are in the circumferential direction strung together and equipped with the rolling elements. The cage segments equipped with the rolling elements are in the area of the first board due to the fact that the cage segments and the inner ring engage with each other and in the area of second boards by the rolling elements captive fixed on the inner ring.

The Invention will be described below with reference to the drawing Embodiment explained.

It demonstrate:

1 an embodiment of the rolling bearing according to the invention fragmentary in section,

2 an embodiment of a cage segment in perspective and

3 the embodiment of the cage segment 2 in section.

1 shows an embodiment of the rolling bearing according to the invention fragmentary in section. The rolling bearing is designed as a double-row tapered roller bearing and serves, for example, the rotatable mounting of a rotor of a wind turbine. The rolling bearing has two axially juxtaposed inner rings 1 , an outer ring 2 , Rolling elements 3 and cage segments 4 on. In 1 is just one of the two inner rings 1 fully illustrated, so that the description below in each case on this inner ring 1 refers. For the other inner ring 1 , which is shown only in part, mutatis mutandis, the same applies. The inner ring 1 has a frustoconical inner raceway 5 on which the rolling elements 3 roll. In a similar way, the outer ring has 2 via a frustoconical outer raceway 6 so that the rolling elements 3 between the inner raceway 5 and the outer raceway 6 roll.

In the area of their minimum diameter is laterally next to the inner raceway 5 a holding board 7 in one piece with the inner ring 1 trained, the inner career 5 surmounted and thus a stop for the rolling elements 3 represents. The truncated cone-shaped rolling elements 3 lie with their small faces 8th on a contact surface 9 of the holding board 7 on, perpendicular to the inner raceway 5 is oriented. The holding board 7 is only when still the rolling bearing of relevance, since the rolling elements 3 in a rotational movement to the region of the maximum diameter of the inner raceway 5 to be postponed. There is next to the inner raceway 5 a starting board 10 in one piece with the inner ring 1 educated. The rolling elements 3 run with her big face 11 at a contact surface 12 of the in-flight shelf 10 at. The contact surface 12 is perpendicular to the inner raceway 5 oriented. The contact surface 12 may also have a slightly convex shape, so that the orientation to the raceway 5 over the contact surface 12 varied. The distance between the contact surface 9 of the holding board 7 and the contact surface 12 of the in-flight shelf 10 is chosen only slightly larger than the longitudinal extent of the rolling elements 3 in this area, so that the rolling elements 3 are installed with a very small clearance parallel to their axial direction in the rolling bearing. Because in the rolling bearing no continuous cage, but the cage segments 4 are used, the small game alone is not enough, with the rolling elements 3 equipped cage segments 4 with removed outer ring 2 on the inner ring 1 to fix. It thus requires further measures, so that the inner ring 1 and the populated cage segments 4 can be handled as a single entity.

This is in the area of the retaining board 7 a circumferential groove 13 with inner surfaces 14 in the inner ring 1 let in, parallel to the axial direction of the rolling elements 3 oriented and to the rolling elements 3 is open. In the groove 13 grab equally oriented tabs 15 the cage segments 4 one. In the in 1 illustrated state in which the outer ring 2 is mounted, the projections touch 15 the cage segments 4 the inner surfaces 14 the groove 13 Not. If the outer ring 2 mounted, has the intervention of the projections 15 the cage segments 4 in the groove 13 of the inner ring 1 thus no effect on the functioning of the rolling bearing.

Will the outer ring 2 dismantled, the rolling bearing is no longer through the outer ring 2 held together. Except in the circumferential direction of the inner ring 1 can the cage segments 4 in the area of the retaining board 7 However, even then move only slightly, as they are with their protrusions 15 on the inner surfaces 14 the groove 13 attacks. In the area of the inboard shelf 10 there is no such forced guidance of the cage segments 4 so that they are in the groove 13 engaging projections 15 pivoted outwards or out of the groove 13 can be pulled out. These movements are only possible if the cage segments 4 not with rolling elements 3 are equipped. As based on 2 will be explained in more detail, are the rolling elements 3 after insertion into the cage segments 4 secured in all directions against falling out. The populated cage segments 4 can therefore only together with the rolling elements 3 to be moved. According to 1 hit the rolling elements 3 however, in trying the cage segments 4 out of the groove 13 pull out, with their large faces 11 at the contact surface 12 of the in-flight shelf 10 and thereby prevent such movement of the cage segments 4 , A pivoting movement of the cage segments 4 from the inner raceway 5 away is also prevented by the large faces 11 the rolling elements 3 at the contact surface 12 of the in-flight shelf 10 attacks. Consequently, those with rolling elements 3 equipped cage segments 4 with removed outer ring 2 captive on the inner ring 1 fixed and together with this a unit that can be handled as a whole and in particular also installed.

2 shows an embodiment of a cage segment 4 in perspective view. Several of these cage segments 4 are in the in 1 shown rolling bearings in the circumferential direction without firm connection lined up. Each cage segment 4 is made of a plastic, for example of poly-phenyl-sulfide or of poly-ether-ether-ketone, and has a first peripheral ridge 16 and a second circumferential ridge 17 on, which run at a distance parallel to each other. The peripheral webs 16 and 17 are slightly curved or have a polygon shape that follows a slight bend. In this case, the bend of the first peripheral ridge 16 a smaller radius of curvature than the curvature of the second circumferential ridge 17 on. At the opposite ends of the first peripheral ridge 16 are the tabs 15 formed so that the cage segment 4 two projections 15 having. The projections 15 have their greatest extent respectively in the longitudinal direction of the first peripheral ridge 16 on.

Between the peripheral webs 16 and 17 extend connecting webs 18 , which are approximately perpendicular to the peripheral webs 16 and 17 are oriented. Overall, by the peripheral webs 16 and 17 and the connecting webs 18 several receiving pockets 19 designed to accommodate the rolling elements 3 serve. To guide the cage segment 4 at the rolling elements 3 have the connecting webs 18 each laterally molded guide surfaces 20 on. The guide surfaces 20 are in the area of the connecting webs 18 closer to the second perimeter bridge 17 as at the first perimeter bridge 16 is arranged, particularly pronounced.

The connecting bridges 18 extend in a direction perpendicular to the plane in which the receiving pockets 19 are arranged so far that they only slightly behind the rolling elements during operation of the rolling bearing 3 stand back and thus the careers 5 and 6 of the rolling bearing do not touch. This causes the cage segments 4 at standstill of the rolling bearing on the raceways 5 and 6 can support and such support takes place even with excessive wear to the then no longer existing Wälzkörperführung the cage segments 4 to replace. These are on the connecting webs 18 surveys 21 educated. The surveys 21 not just on the in 2 visible top of the cage segment 4 trained, but also on the bottom.

The first and the last connecting bridge 18 of the cage segment 4 pointing to their outward facing faces 22 each no guide surfaces 20 because there is no rolling element in this area 3 is arranged, but the next cage segment 4 , Furthermore, the faces 22 the connecting webs 18 between the peripheral webs 16 and 17 concave. This ensures that adjacent cage segments 4 in the area of the circumferential webs 16 and 17 touch. In this way, it can be avoided by the action of adjacent cage segments 4 towards each other to a deformation of the connecting webs 18 and thus to a clamping of the rolling elements 3 that comes in the receiving pockets 19 between the connecting webs 18 are arranged.

3 shows the embodiment of the cage segment 4 out 2 in section. The cut is transverse to the connecting webs 18 guided. For better understanding is in one of the receiving pockets 19 the outline of a rolling element 3 drawn in the cutting plane. The rolling element 3 lies on the guide surfaces 20 the connecting webs 18 on and over the connecting bridges 18 slightly. As a result, on the one hand, a good rolling body guidance of the cage segment 4 given and on the other hand the possibility of a raceway guide provided with increasing wear. In the presentation of the 3 are the surveys 21 on the top and bottom of the cage segment 4 to recognize.

Due to the concave shape of the guide surfaces 20 the connecting webs 18 are the rolling elements 3 in the receiving pockets 19 of the cage segment 4 enclosed and can not fall out in any direction. Accordingly, for the equipping of the cage segment 4 a certain amount of force required, with which the rolling elements 3 in the receiving pockets 19 be pressed. The assembly of the cage segment 4 is preferably prior to attaching the cage segment 4 on the inner ring 1 carried out. To attach the assembled cage segment 4 on the inner ring 1 To facilitate, the edge of the groove points 13 of the inner ring 1 two not figuratively represented recesses, which are slightly larger than the projections 15 of the cage segment 4 are and are arranged at the same distance from each other as the projections 15 of the cage segment 4 , This makes it possible, the projections 15 of the cage segment 4 over the recesses in the groove 13 introduce. If in this way all cage segments 4 on the inner ring 1 are attached, the recesses are closed again. This can for example be done with the material that in the production of the recesses from the edge of the groove 13 was eroded out. This can for example be done with the material that in the production of the recesses from the edge of the groove 13 was eroded out. The recesses may also be designed so that with rolling elements 3 stocked cage segment 4 by elastic deformation of the projections 15 can be pressed. Closing the recesses is thus not required in this case.

Alternatively to the described embodiment, the rolling bearing according to the invention may for example also be formed single row. It is also possible, the rolling elements 3 cylindrical or barrel-shaped, that is to say with a convexly curved lateral surface.

1

inner ring

2

outer ring

3

rolling elements

4

cage segment

5

inner career

6

outer career

7

holding board

8th

small face

9

contact surface

10

start-up board

11

big face

12

approach surface

13

groove

14

palm

15

head Start

16

first peripheral land

17

second peripheral land

18

connecting web

19

receiving pocket

20

guide surface

21

survey

22

face

Claims (17)

Rolling bearings with an inner ring ( 1 ), which has a frustoconical inner raceway ( 5 ) which laterally through a first board ( 7 ) and a second board ( 10 ), an outer ring ( 2 ), which has a frustoconical outer raceway ( 6 ), rolling elements ( 3 ) between the inner raceway ( 5 ) and the outer raceway ( 6 ) and cage segments ( 4 ), in scope aligned with each other and with the rolling elements ( 3 ) are fitted, wherein the with the rolling elements ( 3 ) equipped cage segments ( 4 ) in the area of the first board ( 7 ) in that the cage segments ( 4 ) and the inner ring ( 1 ) and in the area of the second board ( 10 ) through the rolling elements ( 3 ) captive on the inner ring ( 1 ) are fixed. Rolling bearing according to claim 1, characterized in that the inner raceway ( 5 ) in one to the first board ( 7 ) adjacent to their minimum and in one to the second board ( 10 ) adjacent region has its maximum diameter. Rolling bearing according to one of the preceding claims, characterized in that the first board ( 7 ) and the second board ( 10 ) in one piece with the inner ring ( 1 ) are formed. Rolling bearing according to one of the preceding claims, characterized in that the cage segments ( 4 ) the inner ring ( 1 ) with mounted outer ring ( 2 ) do not touch in the area of the intervention. Rolling bearing according to one of the preceding claims, characterized in that the inner ring ( 1 ) in the area of the first board ( 7 ) a circumferentially extending recess ( 13 ), in the projections ( 15 ) of the cage segments ( 4 ) intervene. Rolling bearing according to claim 5, characterized in that the recess ( 13 ) to the rolling elements ( 3 ) is open. Rolling bearing according to one of claims 5 or 6, characterized in that at least one of the projections ( 15 ) of the cage segments ( 4 ) tuned recess in the recess ( 13 ) opens. Rolling bearing according to one of claims 5 to 7, characterized in that the projections ( 15 ) on circumferentially extending webs ( 16 ) of the cage segments ( 4 ) are formed. Rolling bearing according to one of the preceding claims, characterized in that the cage segments ( 4 ) are not interconnected. Rolling bearing according to one of the preceding claims, characterized in that the cage segments ( 4 ) each with a plurality of rolling elements ( 3 ) are equipped. Rolling bearing according to one of the preceding claims, characterized in that the rolling bodies ( 3 ) of the cage segments ( 4 ) are held captive. Rolling bearing according to one of the preceding claims, characterized in that the rolling bodies ( 3 ) in receiving pockets ( 19 ) of the cage segments ( 4 ) are arranged. Cage according to claim 12, characterized in that in the receiving pockets ( 19 ) Guide surfaces ( 20 ) for guiding the cage segments ( 4 ) on the rolling elements ( 3 ) are formed. Rolling bearing according to one of the preceding claims, characterized in that the cage segments ( 4 ) are made of plastic. roller bearing according to one of the preceding claims, characterized that it is formed multi-row. roller bearing according to one of the preceding claims, characterized that it is designed as a tapered roller bearing. Mounting unit for a roller bearing, wherein the mounting unit consists of an inner ring ( 1 ), which has a frustoconical inner raceway ( 5 ) which laterally through a first board ( 7 ) and a second board ( 10 ), rolling elements ( 3 ), on the inner career ( 5 ) and cage segments ( 4 ), which are lined up in the circumferential direction and with the rolling elements ( 3 ) and wherein the with the rolling elements ( 3 ) equipped cage segments ( 4 ) in the area of the first ring ( 7 ) in that the cage segments ( 4 ) and the inner ring ( 1 ) and in the area of the second board ( 10 ) through the rolling elements ( 3 ), captive on the inner ring ( 1 ) are fixed.