JP3025594B2 - Four-row tapered roller bearing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a tapered roller disposed between an inner ring, an outer ring, and an inner and outer ring of an axially multi-split structure,
In particular, the inner roller row is an O-shaped array and the adjacent outer roller row is X
The present invention relates to a four-row tapered roller bearing arranged between a guideway of an inner ring and a guideway of an outer ring in a shape arrangement. Here, the X-shaped arrangement means an arrangement of a so-called front combination type in which the action lines of the tapered rollers in the double roller row converge with respect to the center axis of the bearing, and the O-shaped arrangement means the tapered rollers in the double roller row. Of the so-called back-to-back combination type, in which the action lines are discrete with respect to the center axis of the bearing.

[0002]

2. Description of the Related Art Such tapered roller bearings are already known.
However, for example, German Patent Application Publication No. 361
As disclosed in Japanese Patent No. 5343, the inner rings and the outer rings are always separated from each other by annular spacers. Such a configuration is necessary because the inner race with the roller assembly cannot be disassembled without damaging the individual bearing components for alignment of the bearing rings and adjustment of the bearing clearance. As the opposing end faces of the inner race with the roller assembly are reground, the abrasive powder enters between the bearing components, causing premature damage to the bearing during operation. To avoid this, in the case of known bearings, only the side faces of the annular spacer are separately ground when the bearing rings are aligned. The disadvantage of this known bearing is that it consists of many parts that have to be specially machined, and the precisely matched annular spacers and bearing rings are easily interchanged when assembling the bearing,
The disadvantage is that the bearing clearance adjusted by the annular spacer is not optimal after assembly.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a four-row tapered roller bearing of the type mentioned at the outset consisting of a smaller number of parts than is known, with a pre-adjusted bearing gap having assembled the bearing. In this case, it is formed so that it hardly changes.

[0004]

In accordance with the invention, it is an object of the invention to provide a separate outer race for each roller row and a common inner race for adjacent outer and inner roller rows. This is achieved by the inner outer ring and the inner ring being in direct contact with each other at the end faces facing each other, and the opposite end faces of the inner outer ring being disposed in direct contact with the end faces of the outer outer ring.

[0005] According to the configuration according to the invention, it is no longer necessary to insert an annular spacer between the individual bearing rings. Before alignment of the bearing rings and adjustment of the bearing clearance, the inner race can be finished polished and combined with the roller assembly in one unit. Due to the alignment of the bearing rings and, for example, the adjustment of the bearing gap between the inner roller rows and the corresponding raceways of the bearing rings, the inner ring with the final assembled roller assembly is not damaged without the inner ring being damaged. The mutually facing end faces of the part can be polished accordingly. This eliminates the need for expensive assemblies, such as threaded rings and nuts, for axially fixing the bearing, since tight bearing tolerances, measured on the inner ring, are maintained. A bearing is thus produced which is very inexpensive to manufacture and which can be installed without difficulty.

[0006] Advantageous embodiments of the invention are specified in the claims.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the drawings.

The four-row tapered roller bearing is suitable as a rolling bearing for rolling mills, especially for cold and hot strip rolling lines, and has two inner rings 1,2 and four outer rings 3,4.
5, 6 and rolling elements (conical rollers). The tapered rollers 7 of each roller row 8a, 8b, 8c, 8d are held and guided in a holder 9. Inner (in the axial direction) roller rows 8b and 8c are guide tracks 10b and 10c of the inner rings 1 and 2, respectively.
And the guide tracks 11b and 11c of the inner outer ring portions 4 and 5 are arranged in an O-shape arrangement, and the outer (axially outer) roller rows 8a and 8d are respectively adjacent to the inner roller rows 8b and 8c and X
The guide tracks 10a, 10
b, 10c, 10d and the guide tracks 11a, 11b, 11c, 11d of the outer ring portions 3, 4, 5, 6 are arranged. Each bearing component can be replaced as needed. The width tolerance of the bearing measured for the inner rings 1 and 2 is smaller than ± 0.25 mm. The inner outer rings 4 and 5 are in direct contact with each other at end faces 12 and 13 facing each other, and end faces 14 and 15a located on the opposite sides of the inner outer rings 4 and 5.
Are in direct contact with the end surfaces 14a, 15 of the outer outer rings 3, 6.

For this purpose, the inner outer rings 4, 5 and the outer outer rings 3, 6 and the inner rings 1, 2 are provided with end faces facing each other.
Guide tracks 10b, 10c, 11a, 11b, 11c, 1
Extensions 16, 16a, 1 projecting axially from 1d
7, 17a. The inner rings 1, 2 are also in direct contact at the end faces 18, 19 facing each other. The outer races 3, 4, 5, and 6 have stepped portions 21 in the non-load range of the outer peripheral surface 20.
It has. The inner outer races 4, 5 are provided at their two end faces with a plurality of radially extending cutouts 22 which are arranged on the circumference used for ventilation or lubrication of the bearing. Furthermore, these cutouts 22 are provided with a large inclined part 23 on the inner peripheral surface on the side facing each other, so that an auxiliary grease storage part is formed in the bearing.

The inner rings 1 and 2 have end faces 18 and 1 on the inner peripheral surface.
It has ramps 24 emanating from 9, 25, 26, which facilitate assembly when replacing its components when the whole is constructed closed. Further, the inner rings 1 and 2 are provided with a plurality of lubrication grooves 27 distributed circumferentially on the end faces 18, 19, 25 and 26, and a spiral for accommodating lubricating grease and wear particles on a cylindrical inner peripheral face. It has a groove 29.

The invention is not limited to the embodiment shown, but the structure of the individual structural parts can easily be changed within the scope of the invention.

[0012]

According to the present invention, a four-row tapered roller bearing having a small number of components, which can be easily manufactured at low cost can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view of a four-row tapered roller bearing according to the present invention.

[Explanation of symbols]

 1, 2 Inner ring 3-6 Outer ring 8a-8d Roller row 14, 14a End face 15, 15a End face 16, 16a Extension 17, 17a Extension 18, 18, End face 23, 24 Inclined section 25, 26 End face

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Rotor Middle 8720 Schweinfurt, Gelderscheimer straße 86 (56) References JP-A-61-171917 (JP, A) Japanese Utility Model 63-180102 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) F16C 19/38 F16C 33/58

Claims (6)

(57) [Claims] 1. An axially multi-segmented inner ring having tapered rollers disposed between an outer ring and an inner and outer ring, particularly an inner roller row having an O-shaped arrangement, an adjacent outer roller row having an X-shaped arrangement, and an inner ring having an X-shaped arrangement. In a four-row tapered roller bearing arranged between the guide track and the outer ring guide track, a separate outer ring (3, 4, 5, 6) is provided for each roller row (8a, 8b, 8c, 8d). A common inner ring (1,2) is provided for the outer roller row and the inner roller row adjacent to each other, and the inner outer ring (4,5) and the inner ring (1,2) face each other. 13,18,1
9), the end faces (14, 15a) located on opposite sides of the inner outer ring (4, 5) are connected to the outer outer ring (3, 6).
Characterized in that they are arranged in direct contact with the end faces (14a, 15) of the four-row tapered roller bearing. 2. An end face (14, 14a, 15, 15a, 1
8, 19) are the guide tracks (10b, 10c, 11a, 1).
1b, 11c, 11d) are formed at axially extending portions (16, 16a, 17, 17a) of the inner inner ring (1, 2) and the outer ring (3, 4, 5, 6) projecting in the axial direction. The four-row tapered roller bearing according to claim 1. 3. The four-row tapered roller bearing according to claim 1, wherein the inner outer ring (4, 5) has a large inclined portion (23) on the inner peripheral surface on the side facing each other. 4. An inner ring (1, 2) having an end face (18,
The four-row tapered roller bearing according to any one of claims 1 to 3, wherein the bearing has an inclined portion (24) emanating from each of (19, 25, 26). 5. The four-row tapered roller bearing according to claim 1, wherein all bearing parts are made interchangeable according to the position of the seat. 6. The four-row tapered roller bearing according to claim 1, wherein a width tolerance of the bearing measured for the inner ring (1, 2) is smaller than ± 0.25 mm.