FR2685410A1 - BEARING WITH TAPERED FOUR ROWS. - Google Patents

Abstract

A four-row tapered roller bearing having inner and outer rings divided in the axial direction is disclosed. The central rows of rollers are arranged in O and the neighboring end roller rows are arranged in X between the raceways of the inner and outer ring parts. For each row of rollers (8a, 8b, 8c, 8d), there is provided a separate outer ring part (3, 4, 5, 6) and, for the contiguous central and extreme rows of rollers, a ring part common interior (1, 2). The central outer ring parts (4, 5) and the inner ring parts (1, 2) are applied directly against each other by their end faces (12, 13, 18, 19) facing each other. screws and the end faces (14, 15a) mutually remote from the central parts (4, 5) of the outer ring are applied directly against the end faces (14a, 15) of the end parts (3, 6) of the outer ring.

Description

Four-row tapered roller bearing The present invention

  relates to a four-row tapered roller bearing with inner and outer rings divided into several parts in the axial direction and arranged between

  rings, tapered rollers, preferably rows of wheels

  the central units being arranged in an O and the rows of rollers

  my neighbors being arranged in X between the raceways of the inner ring parts and the raceways of the outer ring parts (The arrangement in X, means that the lines of action of the tapered rollers of the two rows converge with respect to the 'axis

  median of the bearing; the arrangement in O means that the lines of ac-

  tion of the cylindrical rollers of the two rows are divergent by

  relative to the center line of the bearing).

  Tapered roller bearings of this type are known.

  In these, the inner and outer ring parts are separated

  each other by annular spacers as shown

  felt for example in document DE-OS 36 15 343 Such an agency-

  is necessary since it is not possible to disassemble

  the inner ring parts with the roller sets without damage

  mage the different elements of the bearing to adjust

  of the rings and of the clearance adjustment If the correction were made

  tion of the front faces facing the inner ring parts with the sets of rollers mounted, grinding dust could penetrate between the different elements and cause rapid destruction of the bearing In the known bearing, to avoid this drawback,

  only the lateral faces of the annular spacers are ground isolated

  When the bearing rings are adjusted, the inconvenience

  negate known bearings is that they are formed of a large number of elements which must be specially machined and that the spacers

  precisely adjusted rings so that the rings can be made

  cleverly inverted when mounting the bearings, causing play

  which no longer corresponds to the clearance adjusted by means of the spacers.

  The objective of the present invention is to provide a roller

  Four-row tapered roller with fewer elements than in the known embodiments and in which the preset clearance cannot be inadvertently changed at

mounting-

  The problem is solved according to the invention by the fact that there is provided, for each row of rollers, an outer ring portion

  separate and, for the rows of central and extreme rollers

  gues, a part of a common inner ring, that the central parts

  the outer ring and inner ring parts are applied

  quées directly one against the other by their front faces in vis-

  opposite and that the front faces distant from the central parts of the outer ring are applied directly against the front faces of the

  outer parts of the outer ring.

  Thanks to this arrangement, no annular spacer is born.

  between the different ring parts The inner rings can be brought to the final dimension and assembled with the bodies

  rollers to form a set before adjusting the wheel rings

  Lement and adjustment of the clearance For the adjustment of the bearing rings and the adjustment of the clearance, for example between the rows of central rollers and the raceways of the rings concerned, it is possible to correct

  the front faces facing the central parts of the outer ring

  re without risk of damaging the inner rings carrying the sets of rollers mounted This allows a very tight width tolerance to be observed, measured in relation to the inner rings; thus, it is no longer necessary to resort to expensive mounting elements, such as threaded rings and nuts, for the axial positioning of the bearing. According to an improvement of the invention, the front faces

  are arranged on axial extensions of the inner ring parts

  exterior and exterior that protrude from the roadways

is lying.

  According to an embodiment of the rolling

  According to the invention, the central parts of the outer ring are provided, inside the bore with large chamfers, at the level of

  their faces opposite The inner ring parts may include

  bear, in the bore, chamfers which extend from the faces

opposite.

  In accordance with an embodiment of the invention, all

  the bearing parts are interchangeable provided that

  pect their position inside the assembly.

  Advantageously, the width tolerance of the bearing

  measured on the inner rings is less than + 0.25 mm.

  The invention is described below in detail using

  of an embodiment shown in the drawing.

  The single figure shows a tapered roller bearing

with four rows seen in section.

  The tapered roller bearing with four rows of rolling bodies can be used as a rolling mill cage bearing, in particular in cold or hot rolling mills and is formed by two parts of inner ring 1, 2, four parts of outer ring 3 , 4, 5, 6 and rolling bodies The tapered rollers 7 of each row

  rollers 8 a, 8 b, 8 c, 8 d are held and guided by a cage 9

  rollers 8 b, 8 c central are arranged in O between the sleeves

  mins of rolling l Ob, l Oc of inner rings 1, 2 and raceways i lb, 1 i c of central parts 4, 5 of outer ring, while rows of rollers 8 a, 8 d ends and rows of

  rollers 8 b, 8 c contiguous central units are arranged in X between the

  rolling minutes l Oa, l Ob, 1 Oc, ld of inner ring parts

  1, 2 and the tracks lia, i lb, 1 lc, lid of the central parts

  the outer ring 3, 4, 5, 6 The bearing parts are inter-

  changeable as long as their mounting location is respected.

  The bearing width tolerance, measured at the inner ring parts 1, 2, is less than 0.25 mm The central parts

  outer ring 4, 5 are applied directly against one another

  be by their front faces 12, 13 facing each other, while the faces

  mutually distant frontal 14, 15 has central parts of ba

  outer guide 4, 5 are applied directly against the front faces

  the 14 a, 15 of the outer parts of the outer ring 3, 6 The parts

  outer ring centers 4, 5 and the end portions of the outer ring

  3, 6 and the inner ring parts 1, 2 are for

  views on their front faces facing extensions 16, 16 a,

  17, 17 a which protrude in the axial direction with respect to the che-

  rolling mins 10 b, 1 Oc, lia, 11 b, llc, 11 d Ring parts

  interior 1, 2 are also applied directly against each other

  machined by their facing faces 18, 19 The outer ring parts 3, 4, 5, 6 are provided at their peripheral surface 20, in the unloaded zone, with machined zones 21

  recessed The central parts of the outer ring 4 and 5 are

  views, on both sides, on their front faces, of several hollow

  elements 22 distributed around the circumference and oriented in the direction ra-

  which are intended for ventilation or lubrication of the roller

  ment They also have on their opposite faces, inside

  of the bore, large chamfers 23 which form a reser-

  ve additional grease inside the bearing The parts of

  inner ring 1, 2 have inside the bore of the chan-

  brakes 24 which extend from the front faces 18, 19, 25, 26 and facilitate mounting when replacing the complete member The inner ring parts 1, 2 are still provided on their front faces 18, 19, 25 , 26 of several lubrication grooves 27 distributed

  on the circumference and include in the cylindrical bore

  spiral nures 29 intended to receive grease and wear particles.

  The invention is not limited to the embodiment shown

  felt Construction variants are possible without departing from the framework

of the present invention.

Claims (5)

  1 Tapered roller bearing with four rows comprising   both inner and outer rings divided into several parts in the axial direction and, arranged between the bearing rings, tapered rollers, preferably the rows of central rollers being arranged in O and the rows of neighboring extreme rollers being   arranged in X between the raceways of the inner ring parts   and the raceways of the outer ring parts, characterized in that there is provided, for each row of rollers (8 a, 8 b, 8 c, 8 d), an outer ring part (3, 4 , 5, 6) separate and, for the rows of adjacent central and extreme rollers, a common inner ring part (1, 2), than the central ring parts   outer (4, 5) and the inner ring parts (1, 2) are applied   directly opposite one another by their front faces (12, 13, 18, 19) facing each other and that the front faces (14, 15 a) distant from the   central parts (4, 5) of outer ring are applied directly   ment against the front faces (14 a, 15) of the end portions (3, 6) of outer ring.   2 four-row tapered roller bearing according to claim 1, characterized in that the end faces (14, 14a, 15, 15a, 18, 19) are arranged on axial extensions (16, 16a, 17, 17 a) inner ring parts (1, 2) and outer ring parts (3, 4, 5, 6) which protrude from the raceways   bearing (l Ob, 10 c, lia, llb, lic, lld).   3 four-row tapered roller bearing according to claim 1 or 2, characterized in that the central parts of the outer ring (4, 5) are provided, at the opposite faces,   large chamfers (23) inside the bore.   4 Tapered roller bearing with four rows according to   any one of claims 1 to 3, characterized in that   the inner ring parts (1, 2) comprise in the bore, chamfers (24) which extend from the front faces (18, 19, 25, 26). Four-row tapered roller bearing according to   any one of claims 1 to 4, characterized in that   all the rolling parts are interchangeable provided that their   position in the assembly is respected.   6 Four-row tapered roller bearing according to   any one of claims 1 to 5, characterized in that the   bearing width tolerance measured at the inner rings   (1, 2) is less than 0.25 mm.