DE102011002898A1 - Double row tapered roller bearing - Google Patents

Abstract

The invention relates to an angular roller bearing with an outer bearing ring (1) and an inner bearing ring (15) and with raceways (2, 6) of the bearing rings (1, 15) inclined at an angle to the longitudinal axis of the bearing in an O-arrangement, on which Rolling cylindrical rolling elements (10) arranged side by side in two rows, the outer bearing ring (1) being undivided and without rims, the inner bearing ring (15) also being undivided and without radially outer rims, and in which the smallest inner diameter of the outer bearing ring (1) is larger than the largest outer diameter of the inner bearing ring (15). To simplify assembly and to improve the bearing rigidity, it is provided that for the radially outer lateral rim guidance of the rolling elements (10) on both sides of the raceways (6) of the inner bearing ring (15), bandages (13) or rings (17) are axially immovable.

Description

Field of the invention

The invention relates to a tapered roller bearing, with an outer bearing ring and an inner bearing ring and inclined at an angle to the longitudinal axis of the bearing in O arrangement employed raceways of the bearing rings on which roll in two rows juxtaposed cylindrical rolling elements, the outer bearing ring undivided and without Borde is formed, wherein the inner bearing ring is also formed undivided and without radially outer rims, and in which the smallest inner diameter of the outer bearing ring is greater than the largest outer diameter of the inner bearing ring.

Background of the invention

Such a double-row tapered roller bearing is in the DE 199 37 660 A1 described. Since this multi-row tapered roller bearing has no rims on the outer and inner rings, the cylindrical rolling elements are guided in a cage which is formed from two sections which are positively connected to each other at their ends facing each other. The sections of the cage are formed as a mirror image plane cage bands consisting of individual, pockets forming segments. The segments are connected to each other in the circumferential direction by intermediate parts and both cage bands have at their mutually facing ends first engagement parts, in which engages a cohesive connecting part in the form of a wire ring. In this way, a hinge-like composite cage is formed and the cage bands are associated with each other so that a segment of the one cage strip engages in a free space formed by two adjacent segments of the other cage strip. The cage bands have at their opposite ends second engagement parts, in each of which engages a further wire ring.

For this known double row tapered roller bearing is in the DE 10 2006 012 785 A1 stated that the leadership of the cylindrical rolling elements only by the cage, ie without rims, takes place on the bearing rings. To avoid this, it is proposed according to this DE 10 2006 012 785 A1 to form the outer bearing ring undivided and provided with thrust shelves for the cylindrical rolling elements. In addition, the inner ring is radially divided and has no thrust shelves. The leadership of the cylindrical rolling elements is formed by inner rims on a separately formed guide ring, which is centered at a radial end on its outer surface by the outer bearing ring and is encompassed at the other radially opposite end of the inner bearing ring. The two-part formed inner bearing ring is assembled by a clamp-like fastener.

Against this background, the present invention seeks to propose a double-row tapered roller bearing, which consists of a few parts and is thus simple, easy to assemble, able to absorb large radial and axial loads, can be produced with high accuracy, with a predefinable Preloaded let and in particular suitable for tilting moment bearing applications.

Summary of the invention

Based on this task is proposed in a double-row tapered roller bearing of the type mentioned above that the raceways of the inner bearing ring bandages or rings are arranged axially immovable to the radially outer lateral board guide the rolling elements facing side surfaces thrust shelves to the radially outer lateral boarding of the rolling elements form.

A second solution of the aforementioned object is to provide the inner bearing ring with a shelf or paragraph, wherein the smallest inner diameter of the outer bearing ring is greater than the largest outer diameter of the region of the inner Lagerrkngs without board or heel, and that for lateral boarding of the rolling elements at least on the side without board or paragraph a bandage or a ring next to the track is arranged axially immovable.

According to a third solution to the object of the invention is proposed in a double-row tapered roller bearing of the type mentioned without radially outer rims or shoulders on the inner bearing ring, that each raceway is bounded by rims on the inner bearing ring to the radially inner lateral boarding of the rolling elements, and that are provided according to the radially outer lateral guide of the rolling elements according stiff segment cages, which are connected to each other via plug outer segments.

The three solutions of the above-mentioned object are characterized in that both the outer bearing ring and the inner bearing ring are executed undivided, which improves the rigidity of the bearing assembly in the assembled state and the application of an axial and radial bias by mounting with a sufficiently heated allows outer bearing ring, without filling plugs would be required. It is provided that for the preparation of a preloaded tapered roller bearing of the intermediate space between the two bearing rings with the rolling elements can be filled when a predetermined temperature difference between the two bearing rings is set.

The double-row tapered roller bearing according to the invention can be particularly advantageous as rotary axis storage in the tool, printing and textile machinery, for storage of wind turbines, robotic arms, rotary tables and tracking systems of solar systems and the like use when mounting holes are arranged in the outer and inner bearing ring to the double-row tapered roller bearings with the corresponding adjacent structures to connect positively and / or non-positively.

The bandages or rings are preferably fixed immovably by shrinking on the inner bearing ring.

If the bandages consist of spring plate rings or of cut-to-length endless bands with overlapping ends, they can advantageously be fastened by screwing, pinning or welding to the inner bearing ring.

If the outer lateral Bordführung made by massive steel rings, these steel rings may have axial, circumferential projections which are arranged at a small distance from the radial side surfaces of the outer bearing ring, thereby forming the steel rings at the same time an additional, gap-forming seal against inadvertent leakage to the outside.

According to another embodiment may be attached to the bandages plastic rings with axial circumferential projections, which are arranged at a small distance to or sliding on radial side surfaces of the outer bearing ring and thereby form a seal against inadvertent leakage to the outside. This also increases the grease space in the bearing and increases the service life of grease lubrication.

According to another variant it can be provided that the rolling elements are guided by plastic cage segments which seal the tapered roller bearing to the outside.

Finally, the invention relates to the use of the tapered roller bearing according to at least some of the above features with mounting holes in the outer and inner bearing ring as a rotary axis storage in tool, printing and textile machinery, for storage of wind turbines, robot arms, as well as tracking systems of solar systems or other devices.

Short description of the drawing

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

1 a first embodiment of a double row tapered roller bearing according to the invention, in which the rolling elements are guided by a rigid segmented cage,

2 a second embodiment of the double-row tapered roller bearing according to the invention, in which the leadership of the rolling elements by means of both sides of the rows of rolling elements arranged on the inner ring bandages,

3 an embodiment of the double row tapered roller bearing according to the invention accordingly 2 with plastic sealing rings,

4 a further embodiment of the double-row tapered roller bearing according to the invention, in which the rolling elements are guided by massive metal rings arranged on either side of the rows of rolling elements,

5 an inventive two-row tapered roller bearing according to 2 with a seal by outer segments of the cage, and

6 a further embodiment of the double row tapered roller bearing according to the invention, in which the leadership of the rolling elements is effected by a board on the inner bearing ring and on the axially other side by a bandage.

Detailed description of the drawing

Of the various embodiments of the double row tapered roller bearing according to the invention only one half of the bearing is shown in longitudinal section, and it is in the 2 to 6 only those important for understanding as well as the reference numbers 1 different reference numerals entered.

The embodiment according to 1 has an outer bearing ring 1 with in the illustrated embodiment at approximately 90 ° to each other inclined tracks 2 and end-side radial side surfaces 4 as well as with the outer bearing ring 1 passing through fixing holes 3 on. In addition, this tapered roller bearing has an inner bearing ring 5 with to the raceways 2 complementary raceways 6 radially inward through ribs 7 are limited. On the careers 2 and 6 are in two rows cylindrical rolling elements 10 arranged by rigidly executed segment cages 11 guided are. Segment cages 11 are by pluggable outer segments 12 connected with each other.

The inner bearing ring 5 also has axial mounting hole 9 on and has a ring-shaped paragraph 8th , the one end face of one of the pluggable outer segments 12 covering to protect it from external influences. The radially inner lateral board guide of the rolling elements 10 takes place through the radially inner ribs 7 while the radially outer lateral board guide of the rolling elements 10 through the stiffly executed segment cages 11 he follows.

As the smallest inner diameter of the outer bearing ring 1 larger than the largest outer diameter of the inner bearing ring 5 , let the double-row tapered roller bearing mount in such a way that initially the rolling elements 10 with her segment cage 11 on the right side of the inner bearing ring 5 be assembled and the outer segments 12 on the segment cage 11 be plugged, after which the outer bearing ring 1 axially from the left onto the inner bearing ring 5 to the contact with the rolling elements 10 is postponed. After that, the second segment cage 11 in the space between the raceways 2 . 6 introduced and then the rolling elements 10 , Subsequently, this second segment cage is also 11 through the pluggable outer segments 12 closed and the inventive double-row tapered roller bearing is ready to install.

A desired preload and backlash of the double row tapered roller bearing according to the invention can be achieved in that the outer bearing ring 1 is sufficiently heated before mounting. When the outer bearing ring 1 After completion of the assembly cools, he pulls together and creates the desired preload and backlash.

The embodiment according to 2 differs from the embodiment according to 1 in that the radially outer lateral on-board guide of the rolling elements 10 on both sides of the raceways 6 of the inner bearing ring 5 arranged bandages 13 he follows. The rolling elements 10 facing side surfaces of the bandages 13 are according to the angle of the rolling elements 10 beveled and form the thrust rims for the rolling elements 10 to the radially outer lateral boarding guide. The right bandage 13 lies axially on the heel 8th of the inner bearing ring 5 and is thereby axially fixed. The left bandage 13 Can on the outer peripheral surface of the inner bearing ring 5 shrunk, if it is designed as a spring plate ring and is axially fixed by the shrinkage stress. In this embodiment, a desired preload and backlash as well as the embodiment according to 1 to reach.

The embodiment according to 3 points to the embodiment according to 2 on the bandages 13 arranged plastic rings 14 with axial, circumferential projections 24 on, with a small distance to or dragging on the radial front side surfaces 4 of the outer bearing ring 1 are arranged. By the design of these plastic rings 14 This results in an enlarged fat receiving space, resulting in a longer service life of the grease filling.

Another embodiment of the double row tapered roller bearing according to the invention is shown in FIG 4 shown. This embodiment differs from the previous embodiments according to FIGS 1 to 3 in that instead of the bandages 13 massive hardened steel rings 17 on the inner bearing ring 5 shrunk. These steel rings 17 are with contact surfaces 18 provided for Axialbordwirkung and further have axial circumferential projections 25 on, with a small distance to the radial side surfaces 4 of the outer bearing ring 1 are arranged and protect the bearing interior against fat loss. This embodiment is with comb segment cages 16 provided, which are not connected radially on the outside, since the radially outer lateral board guide of the rolling elements 10 through the hardened steel rings 17 and their contact surfaces 18 he follows.

The embodiment according to 5 differs from the embodiment according to 2 in that the inner bearing ring 15 has no shoulder on its radial outer surface, so that both bandages 13 either by shrink fit on the inner bearing ring 15 are fixed, or if the bandages 13 consist of cut to length endless bands with overlapping ends, are fastened by screwing, pinning or welding on the inner bearing ring. In this embodiment, plastic cage segments 19 with sealing effect by attached outer segments 20 intended.

In the embodiment according to 6 has the inner bearing ring 21 on its in the figure right side a starter board 22 for the rolling elements, so on this page a guide through a bandage 13 or a steel ring 17 is not required. In this embodiment, a segment cage 23 provided, whose individual segments by sealing outer segments 20 , as in 5 represented, interconnected, or individually, z. B. are executed with overlaps. The segment cage 23 Here is made of a plastic or a sheet metal.

In the embodiments according to the 2 to 6 can the segment cages 11 . 16 . 19 . 23 by spacers, not shown between the rolling elements 10 to be replaced, which is a guide of the rolling elements 10 ensure without tilting.

All embodiments according to the 1 to 6 are with radially inner rims 7 However, in the embodiments according to FIG 2 to 6 Although advantageous, but need not necessarily be present.

By moving the center circle diameter, the size of the rolling elements can be selected. The massive inner bearing ring 5 . 15 . 21 and the short lever on the outer circumference can expect a high rigidity and usually require no additional support from the shaft to be supported, but only a centering shoulder on the same. The double-row tapered roller bearing according to the invention is of course without the mounting holes 3 and 9 useful if the installation conditions do not require such mounting holes.

Particularly advantageous is the use of the inventive double-row tapered roller bearing with mounting holes 3 . 9 in the outer and inner bearing ring 1 . 5 . 15 . 21 As rotary axis storage in tool, printing and textile machinery, for the storage of wind turbines, robotic arms, rotary tables, tracking systems of solar systems and the like, when high demands are placed on the Kippsteifigkeit at the same time good rotational speed.

LIST OF REFERENCE NUMBERS

1

Outer bearing ring

2

raceways

3

mounting holes

4

Radial side surfaces

5

Inner bearing ring

6

raceways

7

Radial inner thrust rims

8th

paragraph

9

mounting holes

10

Cylindrical rolling elements

11

Rigid segment cage

12

Plug-in outer segments

13

bandages

14

Plastic rings or segments

15

Inner bearing ring

16

Comb segment cages

17

steel rings

18

contact surfaces

19

Plastic cage segments

20

outer segments

21

Inner bearing ring

22

start-up board

23

Sheet metal cage, plastic segment cage

24

Projection on the plastic ring

25

Projection on the steel 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 19937660 A1 [0002]
• DE 102006012785 A1 [0003]

Claims (10)

Tapered roller bearing, with an outer bearing ring ( 1 ) and an inner bearing ring ( 15 ) and at an angle inclined to the longitudinal axis of the bearing in O arrangement employed careers ( 2 . 6 ) of the bearing rings ( 1 . 15 ), on which in two rows of juxtaposed cylindrical rolling elements ( 10 ), whereby the outer bearing ring ( 1 ) is formed undivided and without shelves, wherein the inner bearing ring ( 15 ) is also formed undivided and without radially outer ribs, and in which the smallest inner diameter of the outer bearing ring ( 1 ) is greater than the largest outer diameter of the inner bearing ring ( 15 ), characterized in that the radially outer lateral board guide of the rolling elements ( 10 ) on both sides of the raceways ( 6 ) of the inner bearing ring ( 15 ) Bandages ( 13 ) or rings ( 17 ) are arranged axially immovable. Tapered roller bearing, with an outer bearing ring ( 1 ) and an inner bearing ring ( 5 . 21 ) and inclined at an angle to a longitudinal axis of the bearing in O-arrangement salaried careers ( 2 . 6 ) of the bearing rings ( 5 . 21 ), on which in two rows of juxtaposed cylindrical rolling elements ( 10 ), whereby the outer bearing ring ( 1 ) is formed undivided and without shelves, wherein the inner bearing ring ( 5 . 21 ) is also undivided, and the smallest inner diameter of the outer bearing ring ( 1 ) greater than the largest outer diameter of the inner race ( 5 . 21 ), characterized in that the inner bearing ring ( 5 . 21 ) a board ( 22 ) or paragraph ( 8th ), that the smallest inner diameter of the outer bearing ring ( 1 ) greater than the largest outer diameter of the area of the inner bearing ring ( 5 . 21 ) is without board or heel, and that the lateral guidance of the rolling elements ( 10 ) at least on the side without paragraph a bandage ( 13 ) or a ring ( 17 ) next to the track ( 6 ) of the inner bearing ring ( 5 . 21 ) is arranged axially immovable. Tapered roller bearing, with an outer bearing ring ( 1 ) and an inner bearing ring ( 5 ) and at an angle inclined to the longitudinal axis of the bearing in O arrangement employed careers ( 2 . 6 ) of the bearing rings ( 1 . 5 ), on which in two rows of juxtaposed cylindrical rolling elements ( 10 ), whereby the outer bearing ring ( 1 ) is formed undivided and without shelves, wherein the inner bearing ring ( 5 ) is also formed undivided and without radially outer ribs, and in which the smallest inner diameter of the outer bearing ring ( 1 ) is greater than the largest outer diameter of the inner bearing ring ( 5 ), characterized in that each career ( 6 ) of the inner bearing ring ( 5 ) to the radially inner lateral Bordführung by Borde ( 7 ) on the inner bearing ring ( 5 ) is limited, and that for the radially outer lateral guidance of the rolling elements ( 10 ) according to stiff segment cages ( 11 ) are provided, which via pluggable outer segments ( 12 ) are connected. Tapered roller bearing according to claim 1 or 2, characterized in that the bandages ( 13 ) or rings ( 17 ) by shrinking on the inner bearing ring ( 5 . 15 . 21 ) are fixed immovably. Tapered roller bearing according to claim 1 or 2, characterized in that the bandages ( 13 ) consist of spring plate rings or of cut-to-length endless bands with overlapping ends and by screwing, pinning or welding to the inner bearing ring ( 5 . 15 . 21 ) are attached. Rolled roller bearing according to claim 1, 2 or 4, characterized in that the rings ( 17 ) axially encircling projections, which at a small axial distance to the radial end-side side surfaces ( 4 ) of the outer bearing ring ( 1 ) are arranged. Tapered roller bearing according to one of claims 1, 2, 4 or 5, characterized in that on the bandages ( 13 ) Plastic rings ( 14 ) with axial circumferential projections ( 24 ), which at a small distance to or sliding on radial side surfaces ( 4 ) of the outer bearing ring ( 1 ) are arranged. Tapered roller bearing according to one of claims 1, 2, 4 or 5, characterized in that the rolling bodies ( 10 ) by the tapered roller bearing outwardly sealing plastic cage segments ( 19 . 20 ). Tapered roller bearing according to one of claims 1 to 8, characterized in that it can be filled with its rolling elements for the production of a preloaded tapered roller bearing without the use of filler, when a temperature difference between the two bearing rings ( 1 . 5 ) is set. Use of the tapered roller bearing according to one of claims 1 to 9 with fastening bores ( 3 . 9 ) in the outer and inner bearing ring ( 1 . 5 . 15 . 21 ) as a rotary axis storage in tool, printing and textile machines, for the storage of wind turbines, robot arms, tracking systems of solar systems and the like.

Images