DE102015214330A1 - slewing bearings - Google Patents

Abstract

The invention relates to a slewing bearing (60) designed as a tapered roller bearing or cylindrical roller bearing, having a bearing outer ring (72) between which rolling elements (62, 64) guided in a cage (74) are arranged in at least two rolling element rows (66 , 68) are arranged. According to the invention, it is provided that the bearing inner ring (70) is formed from two firmly interconnected inner rings (10, 40) which are each associated with one of the two rows of rolling elements (66, 68), that each of the two inner rings (10, 40). consists of two ring segments (12, 14, 42, 44), that the bearing outer ring (72) of two firmly interconnected outer rings (20, 50) is formed, each associated with one of the two rows of rolling elements (86, 68), and that each of the two outer rings (20, 50) consists of two ring segments (22, 24, 52, 54). Due to the segmentation of the bearing inner ring (70) and the bearing outer ring (72) is a simplified assembly of large roller bearing (60) given at the same time reduced manufacturing costs.

Description

The invention relates to a large rolling bearing, designed as tapered roller bearings or cylindrical roller bearings, with a bearing inner ring and with a bearing outer ring, between which are guided in a cage rolling elements in at least two rows of rolling elements.

Large-diameter bearings are used, inter alia, in wind turbines, which may be designed, for example, as cylindrical roller bearings or tapered roller bearings. The term slewing bearings are usually understood as those rolling bearings having an outside diameter of more than 0.5 meters. In the use of slewing bearings, among other things, their assembly is problematic, especially in confined spaces, as they are commonly found in gondolas of wind turbines.

From the DE 10 2011 083 119 A1 a rolling bearing is known, in which for deformation assurance of a first and a second bearing ring member, which together form a radially inner or a radially outer bearing ring, this in addition to a non-positive screw in retrospect additionally form-fitting and / or cohesively with the help of a space provided for receiving space one of the bearing ring elements provided, activatable expansion material are interconnected. The two bearing ring elements are in each case in one piece, so designed without a radial pitch. The activatable expansion material may be, for example, a curable and preferably foaming epoxy resin adhesive.

The disadvantage is, inter alia, the increased production and assembly costs through the receiving space and the final expansion material to be activated. Furthermore, no radial division of the bearing ring elements is provided so that there is no significant reduction in the assembly effort in the case of, for example, cranked waves and / or cramped installation conditions.

The invention has for its object to present a slewing bearing, which can be mounted with little effort on a shaft or axis with particular not readily available freely accessible ends or on a cranked shaft or axle.

To solve this problem, the invention is based on a large roller bearing, which is preferably designed as a tapered roller bearing or cylindrical roller bearing, with a bearing inner ring and a bearing outer ring, between which are guided in a cage rolling elements in at least two rows of rolling elements. In this slewing bearing is provided that the bearing inner ring is formed of two firmly interconnected inner rings, each associated with one of the two rows of rolling elements, that each of the two inner rings consists of two ring segments, that the bearing outer ring is formed of two firmly interconnected outer rings, the each one of the two rows of rolling elements are assigned, and that each of the two outer rings consists of two ring segments.

This structure facilitates the installation of a large rolling bearing on, for example, cranked shafts and cranked axles and / or in cramped installation conditions considerably. In addition, the manufacturing process of the large roller bearing can be made more cost-effective due to the segmentation of the bearing rings. In addition, the smaller parts of the bearing rings can be handled and processed more easily.

According to an advantageous embodiment of a slewing bearing with the features of the invention it is provided that the ring segments of the two inner rings and the ring segments of the two outer rings each extend over an angle of α = 180 ° and circumferentially abutting each other form two radial joints on each inner ring or outer ring ,

As a result, the segments of the bearing rings during assembly of the large roller bearing can be relatively easily transported, handle and mounted on a shaft or axle, without prejudice to their dimensions. In principle, instead of the semi-annular shape, the segments can have any open, annular shape with a segment angle of α = 360 ° / n, where n can be any positive integer greater than or equal to three.

According to a further advantageous embodiment, it is provided that the radial joints formed by the two joined ring segments of the first inner ring with respect to the radial joints of the two assembled ring segments of the second inner ring by a respective angle β of 90 ° circumferentially offset, and that the Ring segments of the first inner ring and the ring segments of the second inner ring are non-positively connected to each other by means of connecting means.

As a result, the resulting between the two ring segments of the first inner ring radial joints or butt joints are each overlapped by a ring segment of the second inner ring in the circumferential direction of the bearing, resulting in a high mechanical strength of the first inner ring and second inner ring axially joined together double row bearing inner ring results. Basically, the bearing inner ring and / or the bearing outer ring can be constructed with more than two axially congruent juxtaposed and each segmented inner rings and outer rings.

Finally, it can be provided that the radial joints formed by the two joined ring segments of the first outer ring are circumferentially offset by an angle β of 90 ° with respect to the radial joints of the two joined ring segments of the second outer ring, and that the ring segments of the first Outer ring and the ring segments of the second outer ring are non-positively connected by means of connecting means.

As a result, in turn, two radial joints or butt joints between the two ring segments of the first outer ring are each overlapped by a ring segment of the second outer ring in the circumferential direction of the bearing, resulting in a high mechanical strength of the first outer ring and second outer ring axially joined together bearing outer ring results.

For a better understanding of the invention, the description is accompanied by a drawing. In the drawing shows

1 a schematic cross section through two ring segments of a first inner ring to form a double row bearing inner ring and by two ring segments of a first outer ring to form a double row bearing outer ring,

2 a schematic cross section through two ring segments of a second inner ring to complete the double row bearing inner ring and two ring segments of a second outer ring to complete the double row bearing outer ring, and

3 a partial cross section through an inventive large rolling bearing along the section line III of 1 and 2 ,

The 1 shows a schematic cross section through two ring segments of a first inner ring to form a double row bearing inner ring and two ring segments of a first outer ring to form a double row bearing outer ring. A first inner ring 10 of a total of two inner rings 10 . 40 of in 3 shown large roller bearing 60 is made of two ring segments 12 . 14 formed, each extending over a segment angle of α = 180 °. For the sake of better graphical clarity not designated and in the circumferential direction of the bearing rings and the rolling bearing 60 facing end faces of the ring segments 12 . 14 lie abutting one another and thus form the two-part first inner ring 10 two radial joints 16 . 18 out. Between the end faces mentioned, an at least zone-wise and undercut-free positive connection can be provided in order to ensure the cohesion of the ring segments 12 . 14 of the first inner ring 10 to optimize.

A concentric to the first inner ring 10 arranged first outer ring 20 is accordingly made of two ring segments 22 . 24 constructed with a segment angle of each α = 180 °, whose non-designated end faces to create two radial joints 26 . 28 also in abutment. The first inner ring 10 and the first outer ring 20 are concentric to a longitudinal central axis 30 arranged the large rolling bearing, which is perpendicular to the paper plane in the selected representation. The four ring segments 12 . 14 . 22 . 24 the two bearing rings 10 . 20 also each have an approximately circular sector-shaped cross-sectional geometry.

2 shows a schematic cross section through two ring segments 42 . 44 a second inner ring 40 , the completion of the double-row bearing inner ring 70 serves, as well as two ring segments 52 . 54 a second outer ring 50 , which completes the double-row bearing outer ring 72 serves (see also 3 ). The second inner ring 40 is therefore also made of two ring segments 42 . 44 formed, which also extend over a not designated here segment angle of α = 180 °. Accordingly, a second outer ring 50 from two ring segments 52 . 54 built up. For the sake of better graphic clarity, non-designated end faces of the ring segments 42 . 44 . 52 . 54 lie abutting one another and thus form two radial joints 46 . 48 out. Between these end faces can also be provided at least regionally and undercut-free positive connection. The four ring segments 42 . 44 . 52 . 54 the bearing rings 40 . 50 for the second row of rolling elements 68 also each have an approximately circular sector-shaped cross-sectional geometry.

The first inner ring 10 and the first outer ring 20 for the first row of rolling elements 66 as well as the second inner ring 40 and the second outer ring 50 for the second row of rolling elements 68 form each congruent superimposed as well as creating a in 3 recognizable axial joint 80 a bearing inner ring 70 or a bearing outer ring 72 , The result is the segmented bearing inner ring 70 out of four and the segmented bearing outer ring 72 also constructed of four respectively interconnected in a suitable manner ring segments.

The ring segments 42 . 44 such as 52 . 54 of the second inner and outer ring 40 . 50 are in each case by an angle β of 90 ° with respect to the ring segments 12 . 14 . 22 . 24 of the first inner and outer ring 10 . 20 arranged twisted so that the radial joints 16 . 18 . 26 . 28 ; 46 . 48 . 56 . 58 the bearing inner ring 70 or the bearing outer ring 72 not fully enforce in the axial direction.

3 shows a partial cross section through an inventive large rolling bearing 60 along the section line III of 1 and 2 , The segmented slewing bearing 60 is here exemplary as a tapered roller bearing with slightly frustoconical rolling elements 62 . 64 executed. The rolling elements 62 . 64 are in a first row of rolling elements 66 and a second row of rolling elements 68 axially arranged side by side and roll on the double-row bearing inner ring 70 and the double row bearing outer ring 72 from. Here are the rolling elements 62 . 64 each in unmarked pockets of a cage 74 taken up and led by this. The cage 74 For example, it can be realized as a pin cage with at least two segments. In the case of an alternative cage design, such as a comb cage or a window cage, this is preferably constructed of a plurality of individually combinable individual segments.

The double row bearing inner ring 70 is from the two axially juxtaposed inner rings 10 . 40 formed while the double row bearing outer ring 72 in turn, from the first outer ring 20 and the second outer ring 50 is constructed. The rolling elements roll in the selected cutting plane 62 the first row of rolling elements 66 at the first ring segment 12 of the first inner ring 10 and the first ring segment 22 of the first outer ring 20 down while the rolling elements 64 the second row of rolling elements 68 at the first ring segment 42 of the second inner ring 40 and the first ring segment 52 of the second outer ring 50 roll off.

The two inner rings 10 . 40 and the two outer rings 20 . 50 are each by means of a variety of suitable connecting means 76 . 78 creating an axial joint 80 firmly connected. The connecting means 76 . 78 are preferably arranged circumferentially equally spaced. Here are the lanyards 76 . 78 exemplary as a bolt 82 . 84 formed, which each have a through hole 86 . 88 in the second inner ring 40 and in the second outer ring 50 are arranged, and their better for clarity not designated threaded sections in each case a threaded bore 90 . 92 of the first inner ring 10 and the first outer ring 20 are screwed in. All other connecting means have a corresponding structural design. Alternatively or additionally, the first inner ring 10 and the second inner ring 40 of the bearing inner ring 70 as well as the first outer ring 20 and the second outer ring 50 of the bearing outer ring 72 also riveted and / or glued together.

For radial centering, the first ring segment 22 of the first outer ring 20 as well as all other ring segments of the first outer ring 20 an annular groove 94 or have a circumferential recess, in which a circumferential axial projection 96 of the ring segment 52 of the second outer ring 50 as well as all other ring segments of the second outer ring 50 intervene at least partially positively. The axial projection 96 is here in the range of a side surface 98 of the first ring segment 52 of the second outer ring 50 formed, whereas the annular groove 94 or the recess in a side surface 100 of the first ring segment 22 of the first outer ring 20 is formed, in the assembled state of the large rolling bearing shown here 60 creating the axial joint 80 on the side surface 98 is applied. A gap of the axial joint 80 As well as the radial joints is ideally in the range of only a few micrometers.

Due to the fully segmented design of the bearing inner ring 70 and the bearing outer ring 72 of the slewing bearing 60 This can also be easily assembled and disassembled on, for example, cranked shafts and axles or on parts and axes whose ends are not readily accessible.

LIST OF REFERENCE NUMBERS

10

First inner ring

12

First ring segment of the first inner ring

14

Second ring segment of the first inner ring

16

Radial fugue

18

Radial fugue

20

First outer ring

22

First ring segment of the first outer ring

24

Second ring segment of the first outer ring

26

Radial fugue

28

Radial fugue

30

Longitudinal central axis

40

Second inner ring

42

First ring segment of the second inner ring

44

Second ring segment of the second inner ring

46

Radial fugue

48

Radial fugue

50

Second outer ring

52

First ring segment of the second outer ring

54

Second ring segment of the second outer ring

56

Radial fugue

58

Radial fugue

60

slewing bearings

62

rolling elements

64

rolling elements

66

First row of rolling elements

68

Second row of rolling elements

70

Bearing inner ring

72

Bearing outer ring

74

Cage

76

First connecting means

78

Second connecting means

80

Axial joint

82

bolts

84

bolts

86

Through hole in ring segment 42

88

Through hole in ring segment 52

90

Threaded hole in ring segment 22

92

Second threaded hole in ring segment 12

94

ring groove

96

head Start

98

Side surface of the first ring segment 52 of the second outer ring

100

Side surface of the first ring segment 22 of the first outer ring

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 102011083119 A1 [0003]

Claims (4)

Slewing bearings ( 60 ), designed as a tapered roller bearing or cylindrical roller bearing, with a bearing inner ring ( 70 ) and with a bearing outer ring ( 72 ), between which in a cage ( 74 ) guided rolling bodies ( 62 . 64 ) in at least two rows of rolling elements ( 66 . 68 ) are arranged, characterized in that the bearing inner ring ( 70 ) of two firmly connected inner rings ( 10 . 40 ) is formed, each one of the two rows of rolling elements ( 66 . 68 ) are associated with each of the two inner rings ( 10 . 40 ) of two ring segments ( 12 . 14 ; 42 . 44 ), the bearing outer ring ( 72 ) of two firmly connected outer rings ( 20 . 50 ) is formed, each one of the two rows of rolling elements ( 66 . 68 ), and that each of the two outer rings ( 20 . 50 ) of two ring segments ( 22 . 24 ; 52 . 54 ) consists. Slewing bearings ( 60 ) according to claim 1, characterized in that the ring segments ( 12 . 14 ; 42 . 44 ) of the two inner rings ( 10 . 40 ) and the ring segments ( 22 . 24 ; 52 . 54 ) both of the outer rings ( 20 . 50 ) each extend over an angle α = 180 ° and circumferentially abutting each other two radial joints ( 16 . 18 ; 26 . 28 ) on each inner ring ( 10 . 40 ) or outer ring ( 20 . 50 ) form. Slewing bearings ( 60 ) according to claim 2, characterized in that the of the two assembled ring segments ( 12 . 14 ) of the first inner ring ( 10 ) formed radial joints ( 16 . 18 ) in relation to the radial joints ( 46 . 48 ) of the two joined ring segments ( 42 . 44 ) of the second inner ring ( 40 ) are each arranged at an angle β of 90 ° circumferentially offset, and that the ring segments ( 12 . 14 ) of the first inner ring ( 10 ) as well as the ring segments ( 42 . 44 ) of the second inner ring ( 40 ) by means of connecting means ( 76 ) are positively connected with each other. Slewing bearings ( 60 ) according to claim 2 or 3, characterized in that the of the two assembled ring segments ( 22 . 24 ) of the first outer ring ( 20 ) formed radial joints ( 26 . 28 ) in relation to the radial joints ( 56 . 58 ) of the two joined ring segments ( 52 . 54 ) of the second outer ring ( 20 ) are each arranged at an angle β of 90 ° circumferentially offset, and that the ring segments ( 22 . 24 ) of the first outer ring ( 20 ) as well as the ring segments ( 52 . 54 ) of the second outer ring ( 50 ) by means of connecting means ( 78 ) are positively connected with each other.

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