JPH06649Y2 - Split cylindrical roller bearing assembly - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a split type cylindrical roller bearing assembly, and more particularly to improvement of its disassembly property.

[Conventional technology]

In the split type cylindrical roller bearing assembly, each part such as the inner ring, the outer ring and the housing is divided into two parts along the shaft center so as to be easily attached to the shaft part or the neck part of the roll. To assemble this bearing to a shaft, for example, a guide roll of a continuous casting facility at an iron mill, assemble the lower half of each of the two parts into a roll, and then assemble the upper half of each part with bolts. Tighten together.

By the way, the above guide roll bends downward when a high load is applied during casting. In addition, the shaft centers of the bearings assembled in a pair when the rolls are mounted may be deviated by a small amount in the casting feed direction (in this case, in the horizontal direction). In such a case, the alignment of the bearing is important in order not to apply excessive force to the bearing.

In the conventional split type cylindrical roller bearing assembly of this type,
For example, as shown in FIG. 10, the outer ring 1 is formed in a semicircular shape and is provided only on the load side, and its outer peripheral surface 1A is formed in a spherical shape in order to obtain a self-centering function. On the other hand, the housing is divided into an upper housing 2 and a lower housing 3,
A spherical groove 4 is formed in the lower housing 3 to slidably receive the spherical outer peripheral surface 1A of the outer ring 1. On the end surface 2A of the upper housing 2 which is joined to the end surface 3A of the lower housing 3, a centering space 5 composed of a concave step portion is formed so as to face the flat end surface 1B of the outer ring 1. The alignment space 5 serves as a relief for the outer ring end surface 1B during alignment.

A knock pin 6 is provided at the center of the alignment groove 4, and an elongated hole 7 into which the knock pin 6 is fitted is provided in the outer ring 1. Due to the spherical structure of the spherical outer peripheral surface 1A of the outer ring 1 and the groove 4 of the lower housing 3 which supports the outer peripheral surface 1A, the guide roller is aligned in the feed direction (hereinafter referred to as feed alignment) and in the guide roller deflection direction. Alignment (hereinafter referred to as flexure alignment) is possible.

However, even if the centering space 5 is provided, if the outer ring 1 also rotates as the guide roller rotates, the outer ring end surface 1B of the outer ring 1 rotates.
Cannot contact the center of the upper housing 2 because it abuts against the upper housing 2, and the centering space 5 becomes meaningless. Therefore,
The knock pin 6 and the elongated hole 7 prevent the outer ring 1 from rotating due to the rotation of the guide roller, thereby enabling flexure alignment.

[Problems to be solved by the invention]

However, in the conventional split type cylindrical roller bearing assembly using such a knock pin, even if the outer ring 1 is slid out from the spherical groove 4 of the lower housing 3 when the bearing is replaced, the knock pin 6 becomes an obstacle. In particular, there is a problem that it is almost impossible to remove it when the dirty oil sticks strongly after long-term use.

This invention solves such a conventional problem, and it is an object of the invention to provide a split type cylindrical roller bearing assembly having a self-aligning function and capable of easily removing the outer ring when disassembled. Has an aim.

[Means for solving problems]

The present invention for achieving the above object has an inner ring formed by joining two semicircular divided inner ring members having an outer peripheral track, and a semicircular shape having an inner peripheral track concentric with the inner ring and a spherical outer peripheral surface. An outer ring, an upper housing having a semi-circular raceway on the inner circumference that opposes the inner raceway of the outer race, and a spherical groove that is detachably joined to the upper housing and slidably supports the spherical outer circumferential surface of the outer race. Lower housing on the inner circumference,
In a split type cylindrical roller bearing assembly including an outer ring and a cylindrical roller arranged between races of an upper housing, a concave step portion is formed on an end surface of the upper housing facing an end surface of the semicircular outer ring. A centering space is formed, and a centering support portion is provided in the centering space, the outer ring end surface of which is partially supported by point contact, line contact, or the like.

[Action]

The centering support part, which is arranged in the centering space and partially supports the end surface of the outer ring by point contact, line contact, etc., functions together with the function of the conventional knock pin, that is, the outer ring, together with the function of the rocking fulcrum of the outer ring during centering. Fulfills the rotation control function. Therefore, the knock pin is omitted, and the outer ring can be easily separated from the housing when disassembled.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. It should be noted that the same or corresponding parts as in the conventional case are designated by the same reference numerals.

1 to 4 show an embodiment of the present invention, in which the outer ring 1 has a semicircular shape as in the conventional case, and has a spherical outer peripheral surface 1A and an inner peripheral track 1C. Tenth
There is no elongated hole into which the conventional knock pin shown in the figure fits.

The upper housing 2 has, on its inner peripheral surface, an inner peripheral track 1 of the outer ring 1.
A semicircular inner circumferential track 2C facing C is provided,
Further, the end surface 2A has a centering space 5 formed as in the conventional case. However, in this embodiment, at the center of the bottom surface 5A of the aligning space 5, a steel ball 10 serving as an aligning support portion is provided.
Is different from the conventional one. The inner peripheral track 2C is conventionally formed in the shape of a semi-cylindrical surface, but in this embodiment, it is so-called crown-shaped and bulges toward the inner diameter side as it moves from the end to the center, and the top part thereof is a cylindrical roller described later. It is formed so as to abut on 18. Reference numeral 11 denotes a bolt hole, which penetrates from the seating surface 12 formed by cutting out the outer surface of the upper housing 2 to the end surface 2A, and the fastening bolt 13 with the lower housing 3 is inserted therein.

A spherical groove 4 similar to the conventional one is formed in the lower housing 3, and the spherical outer peripheral surface 1A of the outer ring 1 is slidably fitted therein, but the spherical groove 4 is not provided with the conventional knock pin. . 14 is a screw hole of the fastening bolt 13 for attaching the upper housing 2, and 3A is an end face.

The inner ring 15 is composed of two semi-circular divided inner ring members 15A and 15B having an outer peripheral raceway 16, both 15A and 15B.
Are joined together in an annular shape by tightening bolts 17.

Outer raceway 16 of the inner ring 15 and inner raceway 1C of the outer ring 1
Further, the cylindrical roller 18 is arranged between the upper housing 2 and the inner peripheral raceway 2C.

In the split type cylindrical roller bearing configured as described above, each of the previously divided two parts is divided into, for example, the guide roll R.
The inner ring 15 which is the central member is sequentially attached to the neck portion Rn of the assembly.

In this way, when the pair of bearings attached to the guide roller R are eccentric to each other, the guide roller shaft tilts in the feeding direction according to the amount of eccentricity. Following this inclination, sliding occurs between the spherical outer peripheral surface 1A of the outer ring 1 and the centering groove 4 of the lower housing 3, and the feed is automatically centered. The range of the centering angle β in this feed centering is regulated by the clearance C provided between the outer ring 1 and the centering groove 4 (see FIG. 3).

The continuous casting equipment is operated and the guide roller R is, for example, the first
When starting to rotate in the clockwise direction in the figure, the inner ring 15 integrally rotates and the cylindrical roller 18 rolls. The rolling causes the outer ring 1 to rotate in the clockwise direction, and the center portion of one end face 1B of the outer ring 1 contacts the ball 10 provided in the upper housing 2 in a substantially point contact manner. In this state, when a load during casting is applied to the guide roll R, the guide roller R bends downward, and the axis Ro of the roller neck Rn portion inclines as shown in FIG. 2, for example. Then, following this bending, sliding occurs between the spherical outer peripheral surface 1A of the outer ring 1 of the bearing and the centering groove 4 of the lower housing 3, and the outer ring 1 uses the ball 10 as a fulcrum and the arrow G in FIG. Respond in the direction indicated by. As a result, the guide roller R
Is automatically flexed and aligned. It should be noted that the range of the centering angle α in this flexure centering is restricted by the clearance C provided between the outer ring 1 and the centering groove 4.

At this time, the cylindrical roller 18 on the upper housing 2 side oscillates in the centering direction with the crown-shaped bulging apex of the surface of the inner peripheral raceway 2C serving as a spindle. This is the inner circumference of the upper housing 2,
This is a function that is not available in the conventional products that have a simple inner surface of a cylindrical inner peripheral raceway, and this improves the alignment.

When removing the split cylindrical roller bearing assembly from the guide roller R for repair of the continuous casting facility, first, the fastening bolt 13 is removed, the upper housing 2 is removed, and then the various components may be removed. The outer ring 1 and the lower housing 3 are detached from the guide roller R as a unit, but these two are not pin-coupled as in the conventional case.
It can be easily pulled out by hitting one end of the outer ring 1 (see FIGS. 5 (a) and 5 (b)).

Thus, according to this embodiment, extremely good alignment can be obtained, and the outer ring 1 can be easily attached to the lower housing 3 when disassembled.
Can be taken from. Further, it is not necessary to machine the long hole of the outer ring and the knock pin of the housing 3 which are costly, thus reducing the cost.

In the above embodiment, the ball 10 serving as an alignment fulcrum has been described as being provided on the upper housing 2 side, but the present invention is not limited to this, and it may be embedded on the end face 1B side of the outer ring 1 (Fig. 6).
Further, as the center of fulcrum, instead of the ball 10, a pin 20 having a hemispherical tip may be implanted in the bottom surface 5A of the centering space 5 in the end surface 2A of the upper housing 2 (Fig. 7). The pin 21 formed in the shape of a needle may be implanted in the same manner as above (FIG. 8). Both of them are the same in terms of their effects. If a cage is used, the cage will also be split.

FIG. 9 shows still another embodiment.

In this embodiment, the end face 1B of the outer ring 1 is formed with a mountain-shaped slope inclined in the width direction, and the ridge line portion 22 of the mountain is used as the centering support portion. When the outer ring 1 is assembled into the lower housing 3 and the upper and lower housings 2 and 3 are joined, when the outer ring 1 is rotated by the rotation of the guide roller R, the ridge line portion 22
Comes into line contact with the bottom surface 5A of the aligning space 5 and serves as a supporting portion for aligning.

In this case, it is relatively easy to process the hardened outer ring 1 having a high hardness, and there is an advantage that particularly good bending alignment is obtained.

[Effect of device]

As described above, according to the present invention, the centering space is provided at the end portion of the upper housing, and the centering support portion for supporting the end surface of the outer ring is disposed there. Therefore, the conventional knock pin can be removed, and the bearing can be removed. The disassemblability is greatly improved and the maintenance work becomes easier.

[Brief description of drawings]

FIG. 1 (a) is a front sectional view of an embodiment of the present invention, FIG.
(b) is a partially enlarged view of FIG. 1 (a), and FIG. 2 is II-II of FIG.
Sectional view, FIG. 3 is a sectional view taken along the line III-III in FIG. 1, FIG. 4 is an exploded perspective view of an essential part of FIG. 1, and FIGS. 5 (a) and 5 (b) are members shown in FIG. Sectional view for explaining the disassembling mode of No. 6,
FIG. 7, FIG. 8 and FIG. 8 are partial cross-sectional views showing another embodiment of the main part structure of the present invention, and FIG. 9 is an exploded perspective view of the main part for explaining still another embodiment of the present invention. FIG. 10 is an exploded perspective view of a main part of a conventional split type cylindrical roller bearing assembly. 1 is an outer ring, 1A is a spherical outer peripheral surface of the outer ring, 1B is an end surface of a semicircular outer ring, 1C is an inner peripheral track of the outer ring, 2 is an upper housing,
2A is an end face of the upper housing, 2C is a semicircular inner circumferential track of the upper housing, 3 is a lower housing, 3A is an end face of the housing, 4 is a spherical groove,
5 is a centering space, 5A is its bottom surface, 10, 20, 21, 2
2 is an alignment support part, 15 is an inner ring, 16 is an outer raceway of the inner ring,
18 is a cylindrical roller.

Claims (5)

[Scope of utility model registration request] Claim: What is claimed is: 1. An inner ring formed by joining two semicircular divided inner ring members each having an outer circumferential track, a semicircular outer ring having an inner circumferential track concentric with the inner ring and a spherical outer circumferential surface, It has an upper housing having a semicircular raceway facing the inner raceway of the outer ring on the inner circumference, and a spherical groove removably joined to the upper housing and slidably supporting the spherical outer circumferential surface of the outer race on the inner circumference. In a split type cylindrical roller bearing assembly including a lower housing and a cylindrical roller arranged between the races of the inner / outer ring and the upper housing, an end surface of the upper housing facing an end surface of the semicircular outer ring. A split type characterized in that a centering space consisting of concave stepped portions is formed in the center, and a centering support part where the outer ring end face is partially supported by point contact, line contact, etc. is arranged in the centering space. Cylindrical roller bearing assembly. 2. The split cylindrical roller bearing assembly plate according to claim 1, wherein the centering support portion is a utility model registration in which a steel ball is embedded in either the outer ring end surface or the upper housing end surface. 3. The split type cylindrical roller bearing assembly according to claim 1, wherein the centering support portion is a utility model registration in which a pin having a spherical tip is planted on the end surface of the upper housing. 4. The split type cylindrical roller bearing assembly according to claim 1, wherein the aligning support portion is a utility model registration in which a pin having a needle-like tip is implanted in the end surface of the upper housing. 5. The split type cylindrical roller bearing assembly according to claim 1, wherein the centering support portion comprises a ridge of a mountain-shaped slope formed on the end face of the outer ring.