JP2000291673A - Bearing support device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To prevent corrosion of a retaining ring and a retaining ring groove for preventing a rolling bearing or the like from jumping out, and to prolong the service life without increasing production costs. SOLUTION: A fixed shaft side retaining ring groove 11 and an inner sleeve side retaining ring groove 12 are formed on an outer peripheral surface of a fixed shaft 1 and an inner peripheral surface of an inner sleeve 5 so as to face each other. Elastic retaining rings 13 that elastically expand and contract in the radial direction are attached to 11 and 12, and a screw member 15 is screwed into a radial screw hole 14 of the inner sleeve 5. The fixed shaft side retaining ring groove 11 is elastically pressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing support device used for a bearing for rotatably supporting an outer ring such as a backup roll of a rolling mill or a straightening machine, and more particularly, a retaining ring for preventing a bearing or the like from jumping out. The present invention relates to a bearing support device capable of preventing corrosion of a retaining ring groove and extending the life of the bearing.

[0002]

2. Description of the Related Art In rolling mills and straightening machines for steel facilities,
In order to prevent the work roll from bending, a cylindrical backup roll is provided on the back of the work roll. The cylindrical backup roll is rotatably supported concentrically on a fixed shaft fixed to a housing or the like via a bearing.

FIG. 3 shows a bearing supporting device for supporting the bearing of the backup roll. A backup roll 2 is concentrically disposed on a fixed shaft 1 fixed to a housing (not shown), and a rolling bearing 3 is interposed between the two. The rolling bearing 3 includes an outer ring 3a, an inner ring 3b, and a rolling element 3c.

A sealing device 4 is provided axially outward of the rolling bearing 3, and an inner sleeve 5 fitted to the fixed shaft 1 is disposed radially inward of the sealing device 4, and a sealing device is provided. An outer sleeve 6 fitted to the backup roll 2 is disposed radially outward of the device 4.

[0005] Retaining ring grooves 7 and 8 are formed on the outer peripheral surface of the fixed shaft 1 and the inner peripheral surface of the backup roll 2, respectively. After the device 4 and the inner and outer sleeves 5 and 6 have been assembled, the retaining rings 9 and 10 are mounted, whereby the rolling bearing 3, the sealing device 4 and the inner and outer sleeves 5 and 6 are axially outward. Is prevented from jumping out.

[0006]

By the way, during operation of a rolling mill or the like, the backup roll 2 is provided with cooling water, high-temperature heat,
Because of being exposed to rolling oil, oxide scale, and the like, a portion exposed to the outside by the bearing support device, for example, a retaining ring 9
And the retaining ring groove 7 may be easily corroded by rust. However, as shown in FIG.
Because of its shape, etc., compared to the retaining ring 9 and the retaining ring groove 7,
Rust is less likely to occur.

For this reason, there is a case where it is desired to suppress the occurrence of rust on the retaining ring 9 and the retaining ring groove 7 for preventing the rolling bearing 3 and the like from jumping out, and to extend the life.

In order to prevent the occurrence of rust on the retaining ring 9 and the retaining ring groove 7, Japanese Utility Model Publication No. 8-8375 discloses a cover for covering the retaining ring 9 and the retaining ring groove 7. Although the configuration is disclosed, since the cover must be manufactured as a separate part, the manufacturing cost may be increased.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and prevents corrosion of a retaining ring or a retaining ring groove for preventing a rolling bearing or the like from jumping out, thereby increasing production costs. It is an object of the present invention to provide a bearing support device that can extend the life without inviting.

[0010]

In order to achieve the above object,
In the bearing support device according to the present invention, a bearing is interposed between a fixed shaft and a cylindrical roll provided concentrically with the fixed shaft, and a sealing device is disposed outside the bearing in the axial direction. An inner sleeve fitted to a fixed shaft is provided radially inward of the device, an outer sleeve fitted to an outer ring is provided radially outward of the sealing device, and a retaining ring formed on the inner peripheral surface of the cylindrical roll In the bearing support device, wherein a groove is provided with a retaining ring that comes into contact with an outer sleeve on a side surface, the stationary shaft side retaining ring groove is opposed to an outer peripheral surface of the fixed shaft and an inner peripheral surface of the inner sleeve, respectively. And an inner sleeve side retaining ring groove is formed, an elastic retaining ring that elastically expands and contracts in the radial direction is mounted on both retaining ring grooves, and a screw member is screwed into a radial screw hole of the inner sleeve. The elastic retaining ring is elastically pressed by the member into the stationary shaft-side retaining ring groove. And it features.

As described above, according to the present invention, the fixed shaft side retaining ring groove and the inner sleeve side retaining ring groove are formed on the outer peripheral surface of the fixed shaft and the inner peripheral surface of the inner sleeve so as to face each other. An elastic retaining ring that elastically expands and contracts in the radial direction is attached to these retaining ring grooves, and a screw member is screwed into a radial screw hole of the inner sleeve, and the elastic retaining ring is fixed to the fixed shaft side by the screw member. It is elastically pressed against the ring groove. Therefore,
Since both retaining ring grooves and elastic retaining ring are covered by the inner sleeve itself and shielded from the outside, they are hardly exposed to cooling water, high-temperature heat, rolling oil, oxide scale, etc. Corrosion can be effectively prevented, and the life can be extended. In addition, since the structure is a simple structure in which the inner sleeve side retaining ring groove, the radial screw hole and the screw member are simply added, there is no increase in manufacturing cost unlike the case where the cover is provided as a separate component.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a bearing support device according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view of a bearing supporting device used for a bearing for supporting a backup roll such as a rolling mill according to an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of a main part of FIG. It is.

As shown in FIG. 1, a housing (not shown)
A cylindrical backup roll 2 is concentrically disposed on a fixed shaft 1 fixed to the above, and a rolling bearing 3 is interposed between the two. The rolling bearing 3 includes an outer ring 3a, an inner ring 3b, and an axial moving body 3c.

A sealing device 4 is provided on the outside of the rolling bearing 3 in the axial direction, and an inner sleeve 5 fitted on the fixed shaft 1 is disposed radially inward of the sealing device 4 for sealing. An outer sleeve 6 fitted to the backup roll 2 is disposed radially outward of the device 4.

A retaining ring groove 8 is formed on the inner peripheral surface of the backup roll 2, and a retaining ring 10 is formed in the retaining ring groove 8.
To prevent the rolling bearing 3, the sealing device 4 and the outer sleeve 6 from protruding outward in the axial direction.

Next, as shown in FIG. 2, the fixed shaft side retaining ring groove 11 and the inner sleeve side retaining ring groove 12 are opposed to the outer peripheral surface of the fixed shaft 1 and the inner peripheral surface of the inner sleeve 5, respectively. Is formed. The inner sleeve-side retaining ring groove 12 is formed deeper than the fixed shaft-side retaining ring groove 11, so that the following elastic retaining ring 13 can be temporarily stored therein.

An elastic retaining ring 13 that elastically expands and contracts in the radial direction is mounted on both retaining ring grooves 11 and 12. A plurality of radial screw holes 14 are formed radially outward of the inner sleeve-side retaining ring groove 12, and the plurality of radial screw holes 14 are formed in the circumferential direction of the inner sleeve 5. They are arranged at intervals. A screw member 15 is screwed into these radial screw holes 14, and the screw member 15 elastically presses the elastic retaining ring 13 against the fixed-axis-side retaining ring groove 11.

The procedure for mounting the elastic retaining ring 13 is as follows.
After the elastic retaining ring 13 is once housed in the inner sleeve side retaining ring groove 12, the inner sleeve 5 is fitted to the fixed shaft 1, and thereafter,
A screw member 15 is screwed into the radial screw hole 14, and the elastic member 13 is used to fix the elastic retaining ring 13 to the fixed shaft side retaining ring groove 1.
2, the elastic retaining ring 13 is housed in both the inner sleeve side retaining ring groove 12 and the fixed shaft side retaining ring groove 11 as shown in FIG.

A seal member 16 is provided on the inner peripheral surface of the inner sleeve 5.

As described above, in the present embodiment,
A fixed shaft-side retaining ring groove 11 and an inner sleeve-side retaining ring groove 12 are formed on the outer peripheral surface of the fixed shaft 1 and the inner peripheral surface of the inner sleeve 5 so as to face each other.
An elastic retaining ring 13 that elastically expands and contracts in the radial direction is attached to the inner ring 12, and a screw member 15 is screwed into a radial screw hole 14 of the inner sleeve 5.
3 is elastically pressed into the fixed shaft side retaining ring groove 11.

Therefore, since both the retaining ring grooves 11, 12 and the elastic retaining ring 13 are covered with the inner sleeve 5 and shielded from the outside, the cooling water, the high-temperature heat, the rolling oil, the oxide scale, etc. Rust is effectively prevented, corrosion due to rust is effectively prevented, and a long life can be achieved. In addition, since the structure is a simple structure in which the inner sleeve side retaining ring groove 12, the radial screw hole 14, and the screw member 15 are simply added, a rise in manufacturing cost is caused as in the case where the cover is provided as a separate component. There is no.

The present invention is not limited to the above-described embodiment, but can be variously modified. For example, the rolling bearing may be of a type with a cage or a full-roller type, and the inner ring and the outer ring may have a raceway surface formed on a fixed shaft outer peripheral surface and a backup roll inner peripheral surface, respectively. good.

[0024]

As described above, according to the present invention,
A fixed shaft-side retaining ring groove and an inner sleeve-side retaining ring groove are formed on the outer peripheral surface of the fixed shaft and the inner peripheral surface of the inner sleeve so as to face each other, and then elastically expand and contract radially in these two retaining ring grooves. An elastic retaining ring is mounted, and a screw member is screwed into a radial screw hole of the inner sleeve, and the elastic member is elastically pressed against the fixed shaft side retaining ring groove by the screw member. Therefore, since both the retaining ring groove and the elastic retaining ring are covered by the inner sleeve itself and shielded from the outside, there is almost no exposure to cooling water, high-temperature heat, rolling oil, and oxide scale, Corrosion due to rust can be effectively prevented, and the life can be extended. In addition, since the structure is a simple structure in which the inner sleeve side retaining ring groove, the radial screw hole and the screw member are simply added, there is no increase in manufacturing cost unlike the case where the cover is provided as a separate component.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a bearing support device used for a bearing that supports a backup roll such as a rolling mill according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a main part of FIG.

FIG. 3 is a cross-sectional view of a bearing support device used for a bearing that supports a backup roll such as a rolling mill according to the related art.

[Description of Signs] 1 Fixed shaft 2 Backup roll 3 Rolling bearing 4 Sealing device 5 Inner sleeve 6 Outer sleeve 8 Retaining ring groove 10 Retaining ring 11 Fixed shaft side retaining ring groove 12 Inner sleeve side retaining ring groove 13 Elastic retaining ring 14 Diameter Directional screw hole 15 Screw member 16 Seal member

Claims (1)

[Claims] A rolling bearing is interposed between a fixed shaft and a cylindrical roll provided concentrically with the fixed shaft, and a sealing device is disposed axially outward of the bearing. Inward
An inner sleeve fitted to the fixed shaft is provided, an outer sleeve fitted to the roll is provided radially outward of the sealing device, and a snap ring groove formed on the inner peripheral surface of the cylindrical roll is provided on the outer sleeve side. In a bearing support device having a retaining ring in contact therewith, on an outer peripheral surface of the fixed shaft and an inner peripheral surface of the inner sleeve,
A fixed shaft-side retaining ring groove and an inner sleeve-side retaining ring groove are formed so as to face each other, and an elastic retaining ring that elastically expands and contracts in the radial direction is attached to both of the retaining ring grooves. A bearing support device, wherein a screw member is screwed into the hole, and the screw member elastically presses the elastic retaining ring against the fixed shaft side retaining ring groove.