JP6185306B2 - Cylindrical roller bearing with aligning ring - Google Patents

Description

  The present invention relates to a cylindrical roller bearing with a centering ring, and more particularly to a cylindrical roller bearing with a centering ring applicable to a continuous casting machine, a blower, and a table roller.

  At the steelworks, the finished steel is sent to the casting process. Slabs, blooms, billets, etc. are often cast in a continuous casting machine that directly produces billets from molten steel. The outline of the continuous casting equipment is as follows. First, molten steel is poured from the ladle into the tundish, and then poured into the mold from the top. Cooling water is sprayed on the surface of the slab, and the surface layer portion is sequentially fed backward by a plurality of guide rolls arranged continuously toward the lower side of the mold while solidifying gradually. After that, it is cut into a predetermined length by a cutting device to be a predetermined product size and conveyed to the next process.

  Since the roll used in the continuous casting equipment as described above receives an excessive radial load from the slab and bends, a rolling bearing having alignment is required as a bearing device for supporting the end of the roll.

  Also, the bearing device that holds one end of the roll is in a fixed state (fixed side) to cope with the thermal expansion of the roll caused by heating the roll from the hot slab and to position the roll in the axial direction. The bearing device that supports the other end of the roll is generally used in a so-called free state (free side) so as to allow relative displacement in the axial direction between the roll and the outer ring. It is known that a cylindrical roller bearing with a centering ring is used for this free-side bearing device (see, for example, Patent Document 1).

  FIG. 6 shows a bearing device 150 in which a cylindrical roller bearing 100 with a centering ring is incorporated. A cylindrical roller bearing 100 with an aligning ring used in this bearing device 150 has an inner ring 110 having an inner ring raceway surface 111 on an outer peripheral surface, an outer ring raceway surface 121 on an inner peripheral surface, and the outer peripheral surface 122 has a spherical shape. An outer ring 120 having an inner ring, a plurality of cylindrical rollers 130 which are rotatably arranged between the inner ring raceway surface 111 and the outer ring raceway surface 121, and a spherical inner shape fitted to the outer peripheral surface 122 of the outer ring 120 so as to be swingable. And a centering ring 140 having a peripheral surface 141.

  The inner ring 110 is fitted to the rotary shaft 151 and is positioned in the axial direction by nuts and inner presser lids (not shown) via inner ring spacers 152 and 153 located on both sides in the axial direction. The aligning ring 140 is positioned in the axial direction by fitting into the axle box (housing) 161 and fastening the outer pressing lid 162 to the axle box 161 with a bolt. Further, the space between the inner ring spacer 152 and the outer presser lid 162 and the space between the inner ring spacer 153 and the axle box 161 are sealed by sealing members 171 and 172, respectively.

JP 2009-001921 A

  By the way, in the cylindrical roller bearing 100 with the aligning ring used in the bearing device 150 as shown in FIG. 6, in order to improve the basic dynamic load rating and the basic static load rating, the bearing peripheral parts are changed and the bearing is changed. It is conceivable to secure a wider space for increasing the size or to increase the length of the cylindrical roller. However, changing the bearing peripheral parts leads to an increase in the cost of the entire bearing device, and when the length of the cylindrical roller is increased, the thickness of the collar portion of the outer ring is reduced, which causes a problem of the strength of the collar portion. Occur.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to improve the basic dynamic load rating and the basic static load rating while securing the strength of the outer ring, and to provide a device in which a bearing is incorporated. An object of the present invention is to provide a cylindrical roller bearing with a centering ring capable of suppressing an increase in cost.

The above object of the present invention is achieved by the following configurations.
(1) an inner ring having an inner ring raceway surface on the outer peripheral surface;
An outer ring having an outer ring raceway surface on the inner circumferential surface and an outer circumferential surface having a spherical shape;
A plurality of cylindrical rollers arranged to roll between the inner ring raceway surface and the outer ring raceway surface;
In a rolling bearing with a centering ring provided with a centering ring having a spherical inner peripheral surface fitted so as to be swingable to the outer peripheral surface of the outer ring,
The outer ring has a symmetrical shape in the axial direction, and its axial center is offset with respect to the axial center of the inner ring and the aligning ring,
The aligning ring is formed in an asymmetric shape in the axial direction,
An axial width of the outer ring is longer than an axial width of at least one of the aligning ring and the inner ring.

According to the cylindrical roller bearing with the aligning ring of the present invention, the outer ring has a symmetrical shape in the axial direction, and its axial center is arranged offset with respect to the axial center of the inner ring and aligning ring. The core ring is formed in an asymmetric shape in the axial direction, and the axial width of the outer ring is set longer than the axial width of at least one of the aligning ring and the inner ring. Accordingly, the length of the cylindrical roller can be increased while securing the strength of the collar portion of the outer ring, and the basic dynamic load rating and the basic static load rating can be increased. Further, by not changing the widths of the aligning ring and the inner ring, there is no need to improve the bearing peripheral parts, and the cost increase of the device in which the bearing is incorporated can be suppressed.

(A) is sectional drawing which shows the bearing apparatus with which the cylindrical roller bearing with the aligning ring which concerns on 1st Embodiment of this invention was integrated, (b) is the cylindrical roller bearing with the aligning ring of (a). FIG. (A) is sectional drawing which shows the bearing apparatus with which the cylindrical roller bearing with the aligning ring which concerns on 2nd Embodiment of this invention was integrated, (b) is the cylindrical roller bearing with the aligning ring of (a). FIG. (A) is sectional drawing which shows the bearing apparatus with which the cylindrical roller bearing with the aligning ring which concerns on 3rd Embodiment of this invention was integrated, (b) is the cylindrical roller bearing with the aligning ring of (a). FIG. (A) is sectional drawing which shows the bearing apparatus with which the cylindrical roller bearing with the aligning ring which concerns on 4th Embodiment of this invention was integrated, (b) is the cylindrical roller bearing with the aligning ring of (a). FIG. (A) is sectional drawing which shows the bearing apparatus incorporating the cylindrical roller bearing with the aligning ring which concerns on the 1st modification of this invention, (b) is the alignment which concerns on the 2nd modification of this invention. It is sectional drawing which shows the bearing apparatus with which the cylindrical roller bearing with a ring was integrated. (A) is sectional drawing which shows the bearing apparatus in which the conventional cylindrical roller bearing with a centering ring was integrated, (b) is sectional drawing of the cylindrical roller bearing with a centering ring of (a).

  Hereinafter, a cylindrical roller bearing with a centering ring according to each embodiment of the present invention will be described with reference to the drawings together with a bearing device in which the bearing is incorporated.

(First embodiment)
As shown in FIG. 1, a cylindrical roller bearing 1 with a centering ring according to the first embodiment includes an inner ring 10 having an inner ring raceway surface 11 on an outer peripheral surface, an outer ring raceway surface 21 on an inner peripheral surface, and flanges on both axial sides thereof. An outer ring 20 having a portion 23 and an outer peripheral surface 22 having a spherical shape, a plurality of cylindrical rollers 30 that are arranged between the inner ring raceway surface 11 and the outer ring raceway surface 21 so as to roll freely, and an outer ring And an aligning ring 40 having a spherical inner peripheral surface 41 which is fitted to the outer peripheral surface 22 of 20 in a swingable manner.

  The inner ring 10 is fitted to the rotary shaft 51 and is positioned in the axial direction by nuts and inner pressing lids (not shown) via inner ring spacers 52 and 53 located on both sides in the axial direction. The aligning ring 40 is positioned in the axial direction by fitting into a shaft box (housing) 61 and fastening the outer pressing cover 62 to the shaft box 61 with bolts. Further, between the inner ring spacer 52 and the outer presser lid 62 and between the inner ring spacer 53 and the axle box 61 are sealed by sealing members 71 and 72, respectively.

  The cylindrical roller bearing 1 with the aligning ring configured as described above has the aligning function by sliding the spherical outer peripheral surface 102 b of the outer ring 20 and the spherical inner peripheral surface 104 a of the aligning ring 104. It becomes the composition which is provided, and can cope with the deflection of the shaft while receiving an excessive load.

  In the present embodiment, the axial width of the outer ring 20 is set longer than the axial width of the inner ring 10 and the aligning ring 40, and both end portions of the outer ring 20 are in the axial direction of the inner ring 10 and the aligning ring 40. It protrudes outward in the axial direction from both end faces. Accordingly, the axial length of the cylindrical roller 30 is set longer than that of the conventional bearing 100 shown in FIG. 6, and the basic dynamic load rating is ensured while ensuring the strength of the flange portion 23 of the outer ring 20. And the basic static load rating can be increased. Further, since the axial widths of the inner ring 10 and the aligning ring 40 are not changed, there is no need to improve bearing peripheral parts, and the cost increase of the bearing device 50 in which the bearing 1 is incorporated can be suppressed.

(Second Embodiment)
FIG. 2 shows a cylindrical roller bearing 1a with a centering ring according to a second embodiment of the present invention, and a bearing device 50a incorporating the bearing 1a. In this embodiment, the inner ring 10 has a flange portion 12 at one axial end portion of the inner ring raceway surface 11, and a flange ring 15 that forms a flange portion 16 abuts on the other axial end portion of the inner ring 10. Are arranged. Therefore, in the present embodiment, the flange portion 23 of the outer ring 20 and the flange portions 12 and 16 of the inner ring 10 and the collar ring 15 can receive an axial load.
Other configurations and operations are the same as those in the first embodiment.

(Third embodiment)
FIG. 3 shows a cylindrical roller bearing 1b with an aligning ring according to a third embodiment of the present invention, and a bearing device 50b incorporating the bearing 1b. In the bearing device 50b of this embodiment, since the two sealing members 72 on one end side in the axial direction are arranged, the outer ring 20 extends from the end faces in the axial direction of the inner ring 10 and the aligning ring 40 on one end side in the axial direction. It is not possible to secure the space to be put out. For this reason, the outer ring 20 is formed substantially flush with the axial end surfaces of the inner ring 10 and the aligning ring 40 on one end side in the axial direction, and the shafts of the inner ring 10 and the aligning ring 40 on the other end side in the axial direction. By projecting from the direction end face, the axial width of the outer ring 20 is set to be longer than the axial widths of the inner ring 10 and the aligning ring 40.
For this reason, the axial center X1 of the cylindrical roller 30 and the outer ring 20 is offset to the other axial end side with respect to the axial center X2 of the inner ring 10 and the aligning ring 40. In this embodiment, since the outer ring 20 having a symmetrical shape in the axial direction is offset, the aligning ring 40 is formed in a symmetrical shape in the axial direction in the first and second embodiments. In the form, it is formed in an asymmetric shape in the axial direction in accordance with the outer peripheral surface 22 of the outer ring 20.

Therefore, even in such a configuration, the axial length of the cylindrical roller 30 is set to be longer than that of the conventional bearing 100 shown in FIG. 6, and the basic motion is ensured while ensuring the strength of the flange portion 23 of the outer ring 20. The rated load and basic static load rating can be increased. Further, by not changing the axial widths of the inner ring 10 and the aligning ring 40, it is not necessary to improve the bearing peripheral parts, and the cost increase of the bearing device 50b in which the bearing is incorporated can be suppressed.
Other configurations and operations are the same as those in the first embodiment.

(Fourth embodiment)
FIG. 4 shows a cylindrical roller bearing 1c with a centering ring according to a fourth embodiment of the present invention, and a bearing device 50c incorporating the bearing 1c. In this embodiment, similarly to the second embodiment, the inner ring 10 has a collar portion 12 at one axial end portion of the inner ring raceway surface 11, and a collar portion 16 at the other axial end portion of the inner ring 10. A collar ring 15 is arranged in contact with each other. Similarly to the third embodiment, the outer ring 20 protrudes from the axial end surfaces of the inner ring 10 and the aligning ring 40 only on the other axial end side, so that the axial width of the outer ring 20 is the inner ring 10 and the outer ring 20. It is set longer than the axial width of the aligning ring 40. Thereby, in this embodiment, there can exist an effect similar to 2nd and 3rd embodiment.
Other configurations and operations are the same as those in the first embodiment.

The present invention is not limited to the above-described embodiments, and modifications, improvements, etc. can be made as appropriate without departing from the spirit of the present invention.
For example, the outer ring and the aligning ring of the present invention may have a shape having an oil groove or an oil hole, or may have a shape not having an oil groove or an oil hole.
In this embodiment, the bearing is a full roller type, but may be a type having a cage.
Furthermore, in this embodiment, the axial width of the outer ring is set to be longer than the axial width of both the aligning ring and the inner ring. However, in the present invention, the axial width of the outer ring is the aligning ring. And at least one axial width of the inner ring may be set longer. For example, as shown in FIGS. 5 (a) and 5 (b), first and second modified cylindrical roller bearings 1d and 1e with aligning rings, bearing mountings determined at the positions of the shaft box 61 and the outer presser lid 62 are provided. Without changing the width, both ends of the aligning ring 40 are brought into contact with the axle box 61 and the outer presser lid 62, and only both ends or one end of the aligning ring 40 are made equal to or smaller than the outer ring 20. The embodiment may be partially extended in the axial direction. In addition, although the 1st and 2nd modification changes the cylindrical roller bearing 1 with a centering ring of 1st Embodiment, it is the cylindrical roller bearing 1a-1c with a centering ring of 2nd-4th Embodiment. Can also be diverted.

DESCRIPTION OF SYMBOLS 1 Cylindrical roller bearing with a centering ring 10 Inner ring 11 Inner ring raceway surface 12 Collar part 20 Outer ring 21 Outer ring raceway surface 22 Outer ring surface 23 Collar part 30 Cylindrical roller 40 Alignment ring 41 Inner circumference surface

Claims (1)

An inner ring having an inner ring raceway surface on the outer peripheral surface;
An outer ring having an outer ring raceway surface on the inner circumferential surface and an outer circumferential surface having a spherical shape;
A plurality of cylindrical rollers arranged to roll between the inner ring raceway surface and the outer ring raceway surface;
In a rolling bearing with a centering ring provided with a centering ring having a spherical inner peripheral surface fitted so as to be swingable to the outer peripheral surface of the outer ring,
The outer ring has a symmetrical shape in the axial direction, and its axial center is offset with respect to the axial center of the inner ring and the aligning ring,
The aligning ring is formed in an asymmetric shape in the axial direction,
An axial width of the outer ring is longer than an axial width of at least one of the aligning ring and the inner ring.

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