DE102017117583A1 - Spherical roller bearings - Google Patents

Abstract

The invention relates to a double row spherical roller bearing (1), comprising an outer ring (2) with a spherical outer ring raceway (3), a coaxially arranged bordlosen inner ring (4) with two spherical inner ring raceways (5, 6), which to the spherical outer ring raceway (3). are formed geometrically complementary, and two rows (13, 16) of on the raceways (3, 5, 6) of the outer ring (2) and inner ring (4) rolling barrel rollers (14, 17), which by at least one guided on the inner ring cage (19, 23) are kept at a distance from each other. The invention has for its object to present an operational and wear-resistant guide arrangement for the at least one cage, by means of whose radial clearance is independent of the required depending on the application condition different radial clearance of the barrel rollers in spherical roller bearings, and which is easy and without additional components can be realized. This object is achieved in that the at least one cage (19, 23) has a radially inwardly directed guide surface (20a, 24a), by means of which the cage (19, 23) on a geometrically complementary guide surface (9, 11) of the inner ring (4) is guided radially, that the guide surface (9, 11) of the inner ring (4) axially between an inner ring raceway (5, 6) and an axial side surface (7, 8) of the inner ring (4) is formed, and that at least a guide surface (20a, 24a) of the cage (19, 23) and the at least one guide surface (9, 11) of the inner ring (4) are aligned parallel to the axis of rotation (30) of the spherical roller bearing (1).

Description

The invention relates to a double-row spherical roller bearing, comprising an outer ring with a spherical outer ring raceway, a coaxially arranged, bordlosen inner ring with two spherical inner ring raceways, which are geometrically complementary to the spherical outer ring raceway, and two rows of rolling on the tracks of outer ring and inner ring barrel rollers, which are held by at least one guided on the inner ring cage at a distance from each other.

A double row spherical roller bearing is from the DE 10 2011 079 988 A1 known. The barrel rolls of each row of barrel rolls are each guided by a sheet metal cage. Each of these cages has two parallel side rings, which are interconnected by spaced transverse webs and thus form pockets for receiving the barrel rollers. The side rings, which are disposed adjacent to the side surfaces of the inner ring, are bent radially toward the spherical inner ring raceways of the inner ring, and their radial end surfaces are guided on the respective associated spherical inner ring raceways. In order to avoid line contact of the edges of the radial end surfaces of the axially bent side rings on the spherical inner ring raceways, which would lead to increased wear in this area, the radial end surfaces must be processed consuming according to the curvature of the spherical inner ring raceway. Since such spherical roller bearings are often to have a different radial clearance of the barrel rollers in spherical roller bearings, depending on the expected operating conditions, which is achieved in that the raceway diameter of the inner ring raceway are ground depending on the required radial clearance, it follows that the radial play of these on the inner ring raceways radially guided cages is correspondingly different. This is detrimental to the guidance of the barrel rollers in the spherical roller bearing, unless the cages are adjusted according to the different values of the radial clearance in order to guide the cages regardless of the radial clearance of the barrel roller in the spherical roller bearing. This means that costly different cages for spherical roller bearings with different adjusted radial clearance must be made and kept.

Against this background, the present invention seeks to present a safe operation and wear-resistant guide assembly of at least one cage for the barrel rollers in spherical roller bearings, by means of which its radial clearance is independent of the required depending on the application conditions radial clearance of the barrel rollers in spherical roller bearings, and easy and cost-effective without additional components and mechanical processing can be realized.

This object is achieved by a double row spherical roller bearing with the features of claim 1. Advantageous further developments are mentioned in the dependent claims.

Accordingly, the invention relates to a double-row spherical roller bearings, comprising an outer ring with a spherical outer ring raceway, a coaxially arranged, bordlosen inner ring with two spherical inner ring raceways, which are geometrically complementary to the spherical outer ring raceway, and two rows of rolling on the tracks of outer ring and inner ring barrel rollers which are held by at least one cage guided on the inner ring at a distance from each other.

In this spherical roller bearing is provided according to the invention that the at least one cage has a radially inwardly directed guide surface, by means of which the cage is radially guided on a geometrically complementary guide surface of the inner ring, that the guide surface of the inner ring axially between an inner ring raceway and an axial side surface is formed of the inner ring, and that the at least one guide surface of the cage and the at least one guide surface of the inner ring are aligned parallel to the axis of rotation of the spherical roller bearing.

The guide surfaces on the cage and on the inner ring are thus made axially parallel and cylindrical, so that a planar guidance of the cage is ensured on the inner ring. The guide surface on the inner ring remains unchanged for all different diameters of the at least one inner ring raceway, corresponding to the required radial clearance, so that the guide play of the at least one cage remains unchanged. The guide clearance can be kept very small, independent of the radial clearance, which improves the guidance of the barrel rollers in the spherical roller bearing. The guide surface on the cage can be comparatively easily cylindrically produced by punching or by another mechanical machining, whereby the largest possible contact surface between the guide surface of the cage and the guide surface of the inner ring can be produced.

In a further development of this spherical roller bearing can be provided that the at least one cage has two parallel side rings, the pockets for receiving the barrel rollers forming by a plurality of spaced transverse webs are interconnected, wherein at least one of the side rings is bent radially towards the associated guide surface of the inner ring and its at least one radial end surface forming at least one axially parallel guide surface of the cage, which cooperates with a small radial play with the at least one guide surface of the inner ring.

The at least one axially parallel guide surface of the inner ring can pass into the at least one inner ring raceway without a shoulder or via a step extending radially to the axis of rotation.

It can further be provided that a radial upper edge of the at least one guide surface of the inner ring radially bent side ring of the at least one cage in the radial height of the axes of rotation of the barrel rolls, and that the two side rings connecting transverse webs also in the radial height of the axes of rotation the barrel rolls run. In connection with the structure described so far, it can be seen that the radial upper edge of the at least one guide surface of the inner ring radially bent side ring is located where the axes of rotation of the inclined arranged barrel rollers projecting projecting axially outward.

For a good supply of lubricant and removal of lubricant, axial lubricant bores can be formed in a radially extending side surface of the at least one side ring bent toward the at least one guide surface of the inner ring.

The cage guide according to the invention is particularly useful in a double-row spherical roller bearing having an outer ring with a extending over its entire width spherical outer ring raceway and a bordlosen inner ring with two parallel, spherical inner ring raceways, and with two parallel rows of cage-guided barrel rollers, which on the Rolling raceways of the outer ring and the inner ring, wherein the inner ring axially outwardly immediately adjacent to both end side surfaces and the two inner ring raceways a first axially parallel guide surface or a second axially parallel guide surface, each row of barrel rollers is guided by a respective cage, with their the first axially parallel guide surface on the inner ring cooperating first, axially outer side ring is bent radially inward, and wherein the second, axially inner side ring in Area of the local radial height of the axis of rotation of the barrel rollers between the first row and the second row of barrel rollers is arranged. The aforementioned guide surfaces on the respective cage and on the inner ring are aligned parallel to the axis of rotation of the spherical roller bearing.

A spherical roller bearing having the features of the invention may also be formed in a single row. Here, the formation and orientation of the radial guide surfaces on the single cage and the single-lane inner ring parallel to the axis of rotation of the spherical roller bearing are identical as in the described construction of a double-row spherical roller bearing.

Whether formed single-row or double-row, one of the features of the invention exhibiting spherical roller bearing can be produced with an adaptable to the particular conditions radial clearance, which is adjustable by correspondingly different diameter of the inner ring raceway, while the radial guide clearance between the at least one, axially parallel guide surface of the inner ring and the thus cooperating, at least one axis-parallel guide surface of the at least one cage is unchanged constant.

• 1 einen radialen Teilschnitt durch ein erfindungsgemäßes, zweireihiges Pendelrollenlager,
• 2 einen perspektivischen Schnitt durch das Pendelrollenlager gemäß 1, und
• 3 eine vergrößerte Detaildarstellung des Pendelrollenlagers gemäß 1 mit Darstellung des Radialspiels zwischen der Führungsfläche des Innenrings und der Führungsfläche des wenigstens einen Käfigs an Hand von drei unterschiedlichen Durchmessern der Innenringlaufbahn entsprechend der für die jeweiligen Einsatzbedingungen vorgesehenen Radialluft.

The invention will be explained below with reference to an embodiment shown in the drawing. In the drawing shows

• 1 a partial radial section through an inventive, double-row spherical roller bearings,
• 2 a perspective section through the spherical roller bearing according to 1 , and
• 3 an enlarged detail of the spherical roller bearing according to 1 with representation of the radial clearance between the guide surface of the inner ring and the guide surface of the at least one cage on the basis of three different diameters of the inner ring raceway according to the intended for the respective operating conditions radial clearance.

1 shows therefore a partial radial section through a features of the invention having double-row spherical roller bearings 1 However, the invention is also applicable to single-row spherical roller bearings, in which the axes of rotation of the barrel rollers are parallel to the axis of rotation of the spherical roller bearing.

The double row spherical roller bearing 1 has an outer ring 2 with a spherical outer ring raceway 3 on, extending over the entire axial width of the outer ring 2 extends. The center of curvature of the spherical outer ring raceway 3 lies on a rotation axis 30 Double row spherical roller bearing 1 , and the outer ring raceway 3 has a radius 32 on. This is only indicated here and known to the person skilled in the art. The double row spherical roller bearing 1 also has an inner ring 4 with a first spherical inner ring raceway 5 and a second spherical inner raceway 6 on, each at half the angle between the radii 32 are inclined and with the same radii 32 like the spherical outer ring raceway 3 , are formed.

Adjacent to a left-hand side surface 7 and the first spherical inner raceway 5 is a first, to the axis of rotation 30 parallel guide surface 9 on the inner ring 4 formed, which has a first radially extending paragraph 10 in the first spherical inner ring raceway 5 passes. Mirror-symmetric to the first axis-parallel guide surface 9 is adjacent to a right-hand side surface 8th of the inner ring 4 a second, axially spaced and axially parallel guide surface 11 on the inner ring 4 formed, which has a second, radially extending paragraph 12 in the second parallel, spherical inner ring raceway 6 passes.

There are two rows 13 . 16 cage-guided barrel rollers 14 . 17 in spherical roller bearings 1 arranged around their respective axes of rotation 15 . 18 are rotatable. Recognizable are these axes of rotation 15 . 18 opposite inclined to the axis of rotation 30 of the spherical roller bearing 1 aligned.

The barrel rolls 14 the first row 13 are through a first cage 19 out, which can be made of solid metal made of metal, can be stamped and shaped as a sheet metal part, or may consist of a plastic injection molded part. The first cage 19 has a first, axially outer side ring 20 on, the radially in the direction of the first axis-parallel guide surface 9 on the inner ring 4 is bent. Its radial end surface is as a guide surface 20a formed on the first axis-parallel guide surface 9 on the inner ring 4 is performed with little play. From a radial top edge 20b of the first side ring 20 are mutually spaced transverse webs 22 to a second side ring 21 of the first cage 19 , which is approximately at the radial height of the intersection of the axes of rotation 15 . 18 the barrel rolls 14 . 17 the two barrel rows 13 . 16 in the middle of the spherical roller bearing 1 is arranged in the circumferential direction.

The second cage 23 for the barrel rolls 17 the second row 16 has a first side ring 24 and a second side ring parallel thereto 25 on, which by means of spaced transverse webs 26 connected to each other, so that pockets for receiving these barrel rollers 17 are formed. The second cage 23 is a mirror image of the first cage 19 trained and arranged. Accordingly, the first, axially outer side ring 24 at the second cage 23 bent radially inward, and its guide surface 24a is due to the further axis-parallel guide surface 11 on the inner ring 4 guided radially with little play. The crossbars 26 the second cage 23 extend from a radial top edge 24b of the first side ring 24 the second cage 23 axially inward toward the second side ring 21 of the first cage 19 , The second side ring 21 of the first cage 19 and the second side ring 25 the second cage 23 are arranged axially next to each other and are axially inside the spherical roller bearings 1 at the same radial height, that is approximately at the radial height of the axes of rotation 15 . 18 the barrel rolls 14 . 17 the first row 13 and the second row 16 ,

A radially outwardly open circumferential groove 28 in the outer ring 2 is used for the circumferential distribution of lubricant supplied thereto, which via radial lubricant holes 29 in the region of this circumferential groove 28 in the spherical roller bearing 1 is insertable. Axially aligned lubricant bores 27 are in the frontal side surfaces 20c . 24c the axially outer side rings 20 . 24 of the two cages 19 . 23 formed by which lubricant from the spherical roller bearings 1 is deductible.

The second side ring 21 of the first cage 19 and the second side ring 25 the second cage 23 run noticeably at the same radial height and abut each other without being connected to each other so that they can slide against each other.

3 shows in an enlarged cross section of the spherical roller bearing 1 a constant, radial guidance game C1 between that guide surface 11 of the inner ring 4 , which between the right front side surface 8th and the second spherical inner raceway 6 on the inner ring 4 is formed, and the cooperating, axis-parallel guide surface 24a on the first side ring 24 the second cage 23 ,

Also shows 3 a normal radial clearance CN , a reduced radial clearance C2 and an enlarged radial clearance C3 between the second spherical inner raceway 6 and the rolling surface of the barrel rolls 17 the second barrel roller row 16 , It can be seen that the radial guide play C1 for the cage 23 regardless of the different radial clearance C2 . CN and C3 is. This applies accordingly to the constant leadership game C1 between the first cage 19 and the inner ring 4 , As between the guide surfaces 9 . 11 on the inner ring 4 and the guide surfaces 20a . 24a at the first cage 19 as well as the second cage 23 only a surface contact over the entire width of the first side ring 20 of the first cage 19 or the first side ring 24 the second cage 23 takes place, both of which are cylindrical, the processing costs and wear are low and remain over the intended service life of the spherical roller bearing 1 essentially constant.

All in the above description of the figures, in the claims and in the The introduction mentioned features are used individually as well as in any combination with each other. The invention is thus not limited to the described and claimed feature combinations, but all feature combinations are to be regarded as disclosed.

LIST OF REFERENCE NUMBERS

1

Spherical roller bearings

2

outer ring

3

Spherical outer ring raceway

4

inner ring

5

First spherical inner ring raceway

6

Second, parallel, spherical inner raceway

7

Left side surface of the inner ring

8th

Right side surface of the inner ring

9

First axis-parallel guide surface of the inner ring

10

First radially extending shoulder of the inner ring

11

Second axis-parallel guide surface of the inner ring

12

Second radially extending shoulder of the inner ring

13

First row of cage-guided barrel rollers

14

Barrel rollers of the first row

15

Rotary axle of the barrel rollers of the first row

16

Second row of cage-guided barrel rollers

17

Bollards of the second row

18

Rotary axle of the barrel rollers of the second row

19

First cage

20

First side ring on the first cage

20a

Axially parallel guide surface of the first cage

20b

Radial upper edge of the first cage

20c

Side surface of the first cage

21

Second side ring on the first cage

22

Crossbars of the first cage

23

Second cage

24

First side ring on the second cage

24a

Axially parallel guide surface of the second cage

24b

Radial upper edge of the second cage

24c

Side surface of the second cage

25

Second side ring of the second cage

26

Crossbars of the second cage

27

lubricant bore

28

Circumferential groove on the outer ring

29

Radial lubricant bore

30

Rotary axis of the spherical roller bearing

32

radius

C1

Constant, radial guide play

C2

Reduced radial clearance

CN

Normal radial clearance

C3

Increased radial clearance

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 102011079988 A1 [0002]

Claims (9)

Double row spherical roller bearing (1), comprising an outer ring (2) with a spherical outer ring raceway (3), a coaxially arranged Bordeless inner ring (4) with two spherical inner ring raceways (5, 6), which are formed to the spherical outer ring raceway (3) geometrically complementary , and two rows (13, 16) of barrel rollers (14, 17) rolling on the raceways (3, 5, 6) of the outer ring (2) and inner ring (4), which are guided by at least one cage guided on the inner ring (4). 19, 23) are kept at a distance from each other, characterized in that the at least one cage (19, 23) has a radially inwardly directed guide surface (20a, 24a), by means of which the cage (19, 23) on a geometrically complementary guide surface (9, 11) of the inner ring (4) is guided radially, that the guide surface (9, 11) of the inner ring (4) axially between an inner ring raceway (5, 6) and an axial side surface (7, 8) of the inner ring (4) educated is, and that the at least one guide surface (20a, 24a) of the cage (19, 23) and the at least one guide surface (9, 11) of the inner ring (4) parallel to the axis of rotation (30) of the spherical roller bearing (1) are aligned. Spherical roller bearing after Claim 1 characterized in that the at least one cage (19, 23) comprises two parallel side rings (20, 21; 24, 25) forming the pockets for receiving the barrel rollers (14, 17) by a plurality of spaced transverse webs (22, 26) are interconnected, wherein at least one of the side rings (20, 24) to the associated guide surface (9, 11) of the inner ring (4) is bent radially outwards and its at least one radial end surface, the at least one axially parallel guide surface (20a, 24a) of the Cage (19, 23b) forms, which cooperates with a small radial play (C1) with the at least one guide surface (9, 11) of the inner ring (4). Spherical roller bearing after Claim 1 or 2 , characterized in that the at least one axially parallel guide surface (5, 6) of the inner ring (4) without paragraph in the at least one inner ring raceway (5, 6) passes. Spherical roller bearing after Claim 1 or 2 , characterized in that the at least one axially parallel guide surface (5, 6) of the inner ring (4) via at least one radially to the axis of rotation (30) aligned paragraph (10, 12) merges into the at least one inner ring raceway (5, 6). Spherical roller bearing after one of Claims 1 to 4 , characterized in that a radial upper edge (20b, 24b) of at least one guide surface (9, 11) of the inner ring (4) radially bent side ring (20, 24) of the at least one cage (19, 23) in the region of the radial height the axes of rotation (15, 18) of the barrel rollers (14, 17) extend, and in that the transverse webs (22, 26) connecting the two side rings (20, 21; 24, 25) also in the region of the radial height of the axes of rotation (15, 18 ) of the barrel rollers (14, 17). Spherical roller bearing after one of Claims 1 to 5 , Characterized in that in a side face (20c, 24c) of the at least one guide surface (9, 11) of the inner ring (4) bent towards at least one side of the ring (20, 24) axial lubricating bores (27) are formed. Spherical roller bearing (1), with a over the entire width of the outer ring (2) extending spherical outer ring raceway (3), and with a bordlosen inner ring (4), which has two mutually parallel spherical inner ring raceways (5, 6), and with parallel Rows (13, 16) of cage-guided barrel rollers (14, 17) which roll on the raceways (3, 5, 6) of the outer ring (2) and the inner ring (4), according to one of Claims 1 to 6 , characterized in that the inner ring (4) has a first axially parallel guide surface (9) or a second axially parallel guide surface (11) in each case axially outside immediately adjacent to both front side surfaces (7, 8) and to the two inner ring raceways (5, 6) in that each row (13, 16) of the barrel rollers (14, 17) is guided by a respective cage (19, 23) whose first, axially outer side ring (20) cooperates with the first axis-parallel guide surface (9) on the inner ring (4) ) is bent radially inward, and the second, axially inner side ring (21) in the region of the local radial height of the axis of rotation (15, 18) of the barrel rollers (14, 17) between the first row (13) and the second row (16 ) of the barrel rollers (14, 17) is arranged. Spherical roller bearing after one of Claims 1 to 7 , characterized in that it is formed with radial air (C2, CN, C3) between the barrel rollers (14, 17) and the raceways (3, 5, 6), which is adjustable by correspondingly different diameters of the inner ring raceways (5, 6) wherein the radial guide play (C1) between the at least one, axially parallel guide surface (9, 11) of the inner ring (4) and the cooperating, at least one axis-parallel guide surface (20a, 24a) of the at least one cage (19, 23) regardless of the set radial clearance (C2, CN, C3) remains constant. Spherical roller bearing, with the applicable to a single row spherical roller bearing characteristics of at least one of the preceding claims, and with a design and alignment of the radial guide surfaces on the single cage and on single-lane inner ring parallel to the axis of rotation of the single-row spherical roller bearing.

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