JPH1073128A - Rolling bearing with collar - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cope with the thinning of a rolling bearing maintaining the seal performance of the bearing. SOLUTION: In the rolling bearing with a collar having an inner ring, an outer ring and a rolling body arranged between the inner/outer rings, on the outer periphery surface of whose outer ring the collasr part is installed, a cylinder part 6 with a steel plate cover 5 providing a flange 7 extending to the radial direction outside on one end and a flange 8 extending to the radial direction inside on the other end respectively is pressed in and fixed to the outer periphery surface 2a of the outer ring so that the flange 7 is in contact with the one end surface of the outer ring 2. A ring shape plate 9 providing the flange 10 in the radial direction outside for overlapping with the flange 7 of a steel plate cover 5 is arranged on the end surface 2c of the outer ring 2 and a collar part 11 is formed by integrating the flange 7 of the steel plate cover 5 by a fix means with the flange 10 of the ring shape plate 9. Folding parts 16, 17 slanting to the bearing inside are formed on the inner periphery part of the flange 8 of the steel plate cover 5 and the inner periphery part of the ring shape plate 9 respectively and seal parts C3, C4 are formed between both folded parts 16, 17 and the outer periphery surface 1a of the inner ring respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flanged rolling bearing having a flange formed on the outer peripheral surface of an outer ring.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 3 (corresponding to Japanese Utility Model Application Laid-Open No. 56-93520), a flanged rolling bearing in which a flange portion is formed on the outer peripheral surface of an outer ring has an inner ring 31, an outer ring 30, and an inner and outer ring. A rolling element 32 disposed between the rings 31 and 30 and held by a retainer 33; and a flange 36 extending radially outward at one end of a cylindrical portion 35 having a width substantially equal to the width of the outer ring 30. The cylindrical portion 35 of the steel plate cover 34 provided with a flange 37 extending inward in the radial direction at an end thereof is pressed into the outer peripheral surface 30 a of the outer ring 30 until the radially inner flange 37 contacts one end surface 30 b of the outer ring 30. The radially outer flange 36 is fixed to be a flange, and the radially inner flange 37 is extended 38 to incline its inner periphery toward the inside of the bearing. Form a non-contact seal C1 between And, further, the metal shield plate 41 in a circumferential groove 40 formed in the outer race inner peripheral surface of the outer ring end surface 30c side
And a non-contact sealing portion C2 is formed between the inner peripheral portion of the shield plate 41 and the outer peripheral surface 31a of the inner ring.

[0003]

However, thin rolling bearings are often used for bearings used in equipment such as OA equipment whose size and cost are decreasing. Roller bearings of a thin type are required for heat roller bearings with the downsizing of laser beam printers.
It is difficult to form the circumferential groove 40 of the outer race 30 for fitting and fixing the bearing 1, and it is difficult to seal the bearing, and it is impossible to meet the demand. Further, since the flange portion has a shape in which the radially outward flange 36 is bent into a U-shaped cross section, the flange portion comes into contact with the housing 42, so that it is difficult to position the flange portion with respect to the housing 42.

Accordingly, an object of the present invention is to make it possible to cope with a reduction in the thickness of a rolling bearing while maintaining the sealing performance of the bearing, and to more reliably and easily position the flange portion with respect to the housing. An object of the present invention is to provide a flanged rolling bearing that can be sufficiently obtained.

[0005]

Means for Solving the Problems As means for solving the above problems, there is provided an inner ring, an outer ring, and a rolling element disposed between the inner and outer rings, and a flange portion is provided on an outer peripheral surface of the outer ring. In the flanged rolling bearing, the cylindrical portion of the steel plate cover provided with a flange extending radially outward at one end of the cylindrical portion and a flange extending radially inward at the other end of the cylindrical portion, the radially inward An annular plate provided with a radially outer flange that is press-fitted and fixed to the outer peripheral surface of the outer ring so that the flange abuts against one end surface of the outer ring, and is provided on the other end surface of the outer ring, is provided with a radially outer flange that fits with the radially outer flange of the steel plate cover. A flange portion is formed by integrating the radially outer flange of the steel plate cover and the radially outer flange of the annular plate with fixing means, and forming an inner peripheral portion of the radially inner flange of the steel plate cover and To the inner periphery of the annular plate Each forms a bent portion which is inclined bearing inner side, characterized in that the formation of the respective seal between the both bent portion and the inner ring outer peripheral surface.

In the above-mentioned flanged rolling bearing, the flange portion is formed so as to make surface contact with a housing in which the outer ring is fitted. Also,
In the above-mentioned flanged rolling bearing, the fixing means may be:
It is characterized by being formed by caulking and fixing the end of one outer flange so as to sandwich the other outer flange.

Further, in the above-mentioned or the flanged rolling bearing, the bent portion of the annular plate is bent from the inner corner of the outer ring end face.

In the above invention, since the flange portion is formed by joining the two flanges, the strength is sufficiently maintained, and a part of the steel plate cover and the annular plate is also used as the seal plate. Therefore, there is no need to form a circumferential groove for fitting the shield plate on the outer ring as in the related art, and it is possible to cope with a thin-type rolling bearing that maintains sealing performance.

In the above invention, since the flange is formed so as to be in surface contact with the housing, the positioning of the flange with respect to the housing can be reliably and easily obtained. Moreover, as in the above-described invention, the formation of the flange by the palm of the two flanges of the steel plate cover and the annular plate,
Sufficient strength of the flange can be obtained.

In the above invention, since the bent portion of the annular plate is bent from the inner corner of the end surface of the outer race, when the annular plate is mounted on the outer race, the bent portion is formed at the inner corner of the end surface of the outer race. , The axis alignment is easy and the assembly is easy.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. FIGS. 1 and 2 show an embodiment according to the present invention, in which an inner ring 1, an outer ring 2, and a rolling element 3 arranged between inner and outer rings 1 and 2 and held by a retainer 4 are shown. Have. Then, the cylindrical portion 6 of the steel plate cover 5 provided with a flat flange 7 extending radially outward at one end of the cylindrical portion 6 and a flat flange 8 extending radially inward at the other end thereof, The radially inner flange 8 is press-fitted and fixed to the outer race outer peripheral surface 2a so that the inner flange 8 abuts on one end surface 2b of the outer race 2. Further, the annular plate 9 provided with a flat radially outer flange 10 to be engaged with the radially outer flange 7 of the steel plate cover 5 is connected to the other end surface 2c of the outer race 2.
After the radially outer flange 10 of the annular plate 9 is engaged with the radially outer flange 7 of the steel plate cover 5, the flat flange 11 extending integrally in the radial direction is integrated with the fixing means. Has formed. The flange 11 is connected to the housing 1
Since the shape has a radial surface that comes into surface contact with the housing 9, the positioning of the flange 11 with respect to the housing 19 can be performed reliably and easily.

Next, a description will be given of the means for fixing the two flanges 7 and 10 after the radially outer flange 7 of the steel plate cover 5 and the radially outer flange 10 of the annular plate 9 are joined. Radial outer flange 7 of the steel plate cover 5
A plurality of tongues 12 for bending are formed on the end circumference, and the tongues 12 are joined to the radially outer flange 7 of the steel plate cover 5 in the radial direction of the annular plate 9 made of steel. The surface of the outer flange 10 opposite to the palm engagement surface is crimped 13 along the entire surface so as to make strong contact flatly, and the radial outer flange 10 of the annular plate 9 is attached to the tongue piece 12. The flanges 7 and 10 are fixed by firmly sandwiching between the steel plate cover 5 and the radially outer flange 7 of the steel plate cover 5. Of course, the tongue piece 12 may not be provided on the radially outer flange 7 of the steel plate cover 5 and the radially outer flange 7 may be directly bent. However, the plurality of tongue pieces 12 are formed and folded. Bending is easier to process. Further, as the fixing means, there are various methods such as riveting other than the above-described crimping and bending, but crimping and bending are the easiest to process.

The radially outer flange 10 of the annular plate 9 is formed by bending a root portion 14 of the flange 10 so as to be located in a range on the outer peripheral surface 2a of the outer ring. The crimped bent portion 13 of the radially outer flange 7 substantially coincides with the outer surface 9a of the annular plate 9 in the radial direction or is positioned on the bearing outer ring side. For this reason, the inner ring 1 is combined with the flat surface of
The fixing work of the fixing ring 18 to be fixed to the shaft 20 at the time of attachment to the shaft is not hindered.

Further, bent portions 16 and 17 are formed on the inner peripheral portion of the radially inner flange 8 of the steel plate cover 5 and the inner peripheral portion of the annular plate 9, respectively.
Non-contact sealing portions C3 and C4 are formed between the two bent portions 16 and 17 and the outer peripheral surface 1a of the inner ring, respectively. This sealing portion may be a contact sealing portion in which a rubber seal (not shown) is integrated with an end of the bent portion and the rubber seal is brought into contact with the outer peripheral surface of the inner ring, not shown, in addition to the non-contact shape. The non-contact seal is advantageous in terms of torque reduction, and the contact seal is advantageous in terms of sealing.

Furthermore, the bent portion 17 of the annular plate 9
Are bent from the inner corner 21 of the outer ring end face. For this reason, when attaching the annular plate 9 to the outer ring 2,
7 is guided by the inner corner 21 of the end face of the outer ring, so that axis alignment is easy and assembly is easy.

Furthermore, the bent portions 16 at the inner peripheral portions of the radially inner flange 8 and the annular plate 9 of the steel plate cover 5,
Since the inner ring 17 is formed to be inclined toward the inside of the bearing, the stepped portion 20 a and the shaft 20
Ring 18 and both bent portions 1 fitted in the circumferential groove 20b
Since there is no interference between 6, 6 and 17, the sealing performance is not affected.

[0017]

According to the present invention, the rolling bearing can be made thinner while maintaining the sealing performance of the bearing. In addition, since the housing and the flange are in surface contact, the positioning of the flange with respect to the housing can be performed reliably and easily. In addition, since the flange portion is formed by a pair of flanges, sufficient strength of the flange portion can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view of a flanged rolling bearing of the present invention.

FIG. 2 is a partial view of a main part as viewed in the direction of arrow A in FIG. 1;

FIG. 3 is a sectional view of a conventional flanged rolling bearing.

[Explanation of symbols]

 Reference Signs List 1 inner ring 1a outer peripheral surface 2 outer ring 2a outer peripheral surface 2b one end surface 2c other end surface 3 rolling element 4 retainer 5 steel plate cover 6 cylindrical portion 7 radial outer flange 8 radial inner flange 9 annular plate 9a outer surface 10 radial direction Outer flange 11 Flange part 12 Tongue piece 13 Bend part 14 Root part 15 Flat surface 16 Bend part 17 Bend part 18 Fixing ring 19 Housing 20 Axis 21 Inner corner part

Claims (4)

[Claims] 1. A flanged rolling bearing having an inner race, an outer race, and a rolling element disposed between the inner and outer races, wherein a flange is provided on an outer peripheral surface of the outer race. The cylindrical portion of the steel plate cover provided with a flange extending radially outward at the other end and a flange extending radially inward at the other end, on the outer peripheral surface of the outer ring as the radially inner flange abuts against one end surface of the outer ring. An annular plate provided with a radially outer flange which is press-fitted and fixed to be engaged with the radially outer flange of the steel plate cover is disposed on the other end surface of the outer ring, and the radially outer flange of the steel plate cover and the annular plate are provided. The outer flange in the radial direction is integrally formed with a fixing means to form a flange portion, and the inner peripheral portion of the radially inner flange of the steel plate cover and the inner peripheral portion of the annular plate are inclined toward the bearing inner side, respectively. To form a bent portion, the two bent portions A flanged rolling bearing, wherein a sealing portion is formed between the flange and the inner ring outer peripheral surface. 2. The flanged rolling bearing according to claim 1, wherein the flange portion is formed so as to make surface contact with a housing into which the outer ring is fitted. 3. The fixing means according to claim 2, wherein said fixing means is formed by caulking and fixing an end of one outer flange so as to sandwich the other outer flange.
A flanged rolling bearing according to item 1. 4. The flanged rolling bearing according to claim 1, wherein the bent portion of the annular plate is bent from an inner corner of the outer ring end surface.