JPH0754663Y2 - Cylindrical roller bearing with seal - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is to improve the sealing performance of a non-separable cylindrical roller bearing with a seal.

[Conventional technology]

Conventionally, as this type of non-separable cylindrical roller bearing, for example, one described in Japanese Utility Model Laid-Open No. 60-93015 is known. In this bearing, as shown in FIG. 3, an outer ring 1 is a bearing ring having a flange 1a at both shaft ends, and an inner ring 2 is a flange 3a at one end.
And a collar ring 4 in contact with the end surface of the cylindrical roller 5
And a step surface 4a and a notch surface 4b are formed on the outer diameter surface of the collar ring 4. The seal plate 6 fitted into the circumferential groove 1b on the inner circumference of the shaft end of the outer ring 1 has an inner peripheral portion of the cored bar 7 bent obliquely inward so that the inner end edge of the cored bar 7 is axially inward. The extending inner lip 8 is in sliding contact with the step surface 4a of the collar ring 4, and the outer lip 9 extending obliquely inward in the axial direction is orthogonal to the inner peripheral portion of the core metal 7 and the notch surface 4b of the collar ring 4. Is in sliding contact with.

[Problems to be solved by the invention]

In the above cylindrical roller bearing, when the collar ring 4 moves in the axial direction and the radial direction during conveyance, external force or impact is applied to the inner lip 8 and the outer lip 9 of the seal plate 6 by the collar ring 4. In addition, the inner lip 8 and the outer lip 9 may not only be damaged or worn, but also may be plastically deformed when a large external force or impact is applied, which impairs the sealing function of the seal plate when the bearing is used. is there.

For this reason, it is necessary to fix the movement of the collar wheel 4 during conveyance by using a special jig, which requires a great deal of labor and time to attach and detach the jig.

An object of the present invention is to solve the above problems and to provide a cylindrical roller bearing that prevents the lip of the seal plate from receiving an external force or shock during transportation without using a fixing jig.

[Means for Solving the Problems] In the cylindrical roller bearing with a seal of the present invention, one of the outer ring and the inner ring is a combination of one raceway ring with a collar and a collar ring, or one Brimless race ring and 2
The outer diameter surface or the inner diameter surface of at least one of the collar and the collar ring of the one-sided collar ring, or the outer diameter surface or the inner diameter of at least one of the two collar rings. The surface is formed with a notch surface that reduces or expands in diameter in two steps via a step surface from the inner side to the outer side in the axial direction.

The seal plate attached to the other one of the outer ring and the inner ring is a bent portion extending substantially inward in the axial direction from the end edge of the intermediate portion extending in the radial direction through the inclined portion axially outward from the attachment portion. The bent portion of the seal plate is provided with a cored bar formed with a core and a lip portion made of an elastic body that extends in a substantially radial direction on the side opposite to the mounting part from the connecting portion between the intermediate part and the bent part of the cored bar. The tip end surface and the peripheral surface on the lip portion side are respectively covered with elastic bodies.

The bent portion of the seal plate is the first of either the outer ring or the inner ring.
A non-contact type seal part is constructed in close proximity to the step surface and the notch surface with a slight axial clearance and radial clearance, respectively, and a bearing ring with one collar or a collar ring is used as the shaft. Direction and radial directions to control the movement in both directions, and the side surface of the tip portion of the lip portion of the seal plate is in sliding contact with the second step surface of either the outer ring or the inner ring to make a contact type seal. Make up part.

[Action]

According to the sealed cylindrical roller bearing of the present invention, when the bearing ring with a collar or the collar ring moves in the axial direction and the radial direction during transportation, the bent portion of the seal plate causes the first ring of the bearing ring with a collar or the collar ring to move. In order to support the one-sided stepped ring and the notched surface and support the one-sided orbital ring or collar ring to prevent its movement, the lip portion of the seal plate has a large one-sided orbital ring or collared ring. No external force or shock is applied.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a vertical sectional side view of an upper half portion showing an embodiment of the present invention.

The outer ring 10 is a bearing ring with double collars having flanges 11 on both axial ends, and a circumferential groove 10a for fitting a seal plate, which will be described later, is formed on the inner circumferential surfaces of both axial ends.

The inner ring 12 is configured by combining a one-sided collar ring 13 having a collar 14 on one shaft end side and a collar ring 16 assembled on the other shaft end side.
Notch surfaces 13c and 13d, which are reduced in diameter from the inner side to the outer side in the axial direction, through a first step surface 13a on the upper step side and a second step surface 13b on the lower step side in two steps in the vertical direction. Similarly, the outer diameter surface of the collar wheel 16 is also formed with upper and lower first step surfaces 16a and lower step second step surfaces 16b, and the cutout surfaces 16c and 16d are reduced in two steps vertically. Has been done.

Between the outer ring 10 and the inner ring 12 described above, a plurality of cylindrical rollers 19 that are held and guided by a cage 19a and rotate are interposed.
Both shaft end sides are sealed by a seal plate 20 fitted in the circumferential groove 10a of 10 and grease is filled inside the bearing.

The seal plate 20 is composed of a cored bar 21 and an elastic body 26 such as rubber integrally bonded to the cored bar 21, and the outer peripheral portion is a mounting portion 22 formed by bending the cored bar 21 outward in the axial direction. An intermediate portion 24 extending inward in the radial direction from an inner peripheral edge of the portion 22 through an inclined portion 23 inwardly inward in the axial direction is formed.
A bent portion 25 is formed by bending from the inner peripheral edge of the inner peripheral portion of the inner peripheral surface of the inner peripheral portion of the inner peripheral portion at an angle of approximately 90 degrees.

The elastic body 26 of the seal plate 20 is an axially outer surface (outer surface) from both surfaces of the edge portion of the core metal of the mounting portion 22 to the intermediate portion 24 via the inclined portion 23, and the tip end surface of the core metal of the bent portion 25. And the inner and outer peripheral surfaces are respectively covered and adhered, and a lip portion 27 that extends substantially inward in the radial direction from the inner peripheral surface of the continuous portion of the intermediate portion 24 and the bent portion 25 is formed. A tip portion 27a having a thickness larger than that of the extending portion is provided at the end edge.

The seal plate 20 is fitted with the mounting portions 22 which are swaged into the circumferential grooves 10a on the left and right sides of the outer ring 10, respectively. In the seal plate 20 at the left shaft end, the tip end surface of the bent portion 25 is close to the one-sided collar ring 13 and the first step surface 13a on the upper step side with a slight axial clearance. , The inner peripheral surface of the bent portion 25 is close to the first cutout surface 13c on the upper stage side with a slight radial clearance to form a non-contact type seal portion,
The axially inner side surface of the lip tip portion 27a is the second lower side.
The contact type seal portion is constituted by sliding contact with the step surface 13b.
Similarly, in the seal plate 20 at the right shaft end, the front end surface of the bent portion 25 and the inner peripheral surface of the collar ring 16 are the upper step side first step surfaces.
16a and the first cutout surface 16c are close to each other with a slight gap therebetween to form a non-contact type seal portion, and the lip tip portion 27
The side surface on the inner side in the axial direction of a is in sliding contact with the second step surface 16b on the lower step side to form a contact-type seal portion.

Cylindrical roller bearings with the above configuration are
When the collar ring 13 or the collar ring 16 moves in the axial direction, the first step surface 13a on the upper stage side of the one-sided collar ring 13 or the first step surface 16a on the upper stage side of the collar ring 16 is a bent portion of the seal plate 20. When the one-rim flanged race ring 13 or the collar ring 16 moves in the radial direction by contacting the tip end surface of 25, the first cutout surface 13c on the upper-stage side of the one-rim collared race ring 13 or the upper-stage side of the collar ring 16 The first cutout surface 16c of the first contact surface abuts on the inner peripheral surface of the bent portion 25 of the seal plate 20. The bent portion 25 of the seal plate 20 is a portion in which the inner peripheral edge of the cored bar 21 is bent and formed inward in the axial direction, and has high bending rigidity, and even if an external force is applied by the one-sided collar ring 13 or the collar ring 16. Since it does not deform, the ring 13 with a collar or the collar 16 has a sealing plate 20.
Axially and radially supported by the bent portion 25 of
The movement of the seal plate 20 in the axial direction and the radial direction exceeding the clearance between the seal plate 20 and the bent portion 25 is prevented.

In the cylindrical roller bearing in which the seal plate 20 is assembled as described above, the bent portion 25 of the seal plate 20 has the first step surfaces 13a and 16a and the first cutouts on the upper step side of the race ring 13 with the flange and the flange wheel 16. Face 13c, 16c
Since the non-contact type seal part is formed between the bearing and, the leakage of the grease filled in the bearing to the outside of the bearing is prevented.

Further, since the lip tip portion 27a of the seal plate 20 constitutes a contact-type seal portion between the one-rim collared race ring 13 and the collar ring 16 and the second step surface 13b, 16b on the lower step side, Ingress of foreign matter from outside the bearing is blocked.

The lip tip portion 27a of the seal plate 20 has second side surfaces 13b, 16b on the lower side of the side surface of the raceway ring 13 with a collar and the collar ring 16.
Since they are slidably contacted with each other, it is possible to prevent the lip tip portion 27a from being reversed when the seal plate 20 is assembled and the sealing property being deteriorated.

Further, since the seal plate 20 is assembled so as not to project outward in the axial direction from the end surface of the bearing, it can be used without interfering with each other even when combined with other parts.

The seal plate 20 of the above embodiment has flexibility because the extending portion of the lip portion 27 is thinner than the lip tip portion 27a, and thus has flexibility and easily follows the movement in the axial direction. Therefore, the change in the contact pressure of the lip tip portion 27a of the seal plate 20 is small, and the sealing performance is not deteriorated even in the axial movement.

Further, the seal plate 20 of this embodiment includes the inclined portion 23 and the intermediate portion 24.
And the space part 29 as a grease reservoir due to the bent part 25
Since the grease is formed, the grease pushed out from the raceway by the cylindrical roller 19 when the bearing is used can be retained in this space 29, and the mounting portion 22 and the lip portion 27 of the seal plate 20 can be held.
The grease does not flow out of the bearing from outside.

Further, in this embodiment, since both sides of the edge portion of the core metal of the mounting portion 22 of the seal plate 20 are covered with elastic bodies to seal the caulked portion of the core metal, the outer ring 10 is mounted in the circumferential groove 10a. The sealing property of the portion 22 is also high.

Further, since the seal plate 20 of this embodiment covers the tip end surface and the inner peripheral surface of the cored bar of the bent portion 25 with the elastic body, even if the race ring 13 with one collar or the collar ring 16 moves. No abrasion powder is generated unlike when metal surfaces contact each other,
It is possible to prevent the bearing life from being shortened due to the inclusion of wear powder in the enclosed grease.

FIG. 2 is a vertical sectional side view of an upper half portion showing another embodiment of the present invention.

In this embodiment, the outer ring 12 is constituted by combining a collarless bearing ring 15 having no flanges on both shaft end sides and a collar ring 17, 18 assembled on both shaft end sides.
As in the embodiment of FIG. 1, the outer diameter surface of the first step surface 17a, 18a and the first notch surface 17c, 18c on the upper side, and the second step surface 17b, 18b on the lower side and the first step surface 17c, 18c, respectively. Two cutout surfaces 17d and 18d are formed.

The structure and the assembled state of the seal plate 20 are basically the same as those of the seal plate of FIG. 1, but the elastic body 26 covering the outer peripheral surface of the bent portion 25 is slightly radial direction from the bent portion 25. Bent from the outside
The auxiliary lip portion 28 is formed by extending the tip end surface of the auxiliary lip portion 25 to the inner side in the axial direction.
A non-contact type seal portion is formed by making a small gap between the outer diameter surface of 17, 18 and the outer surface.

Since the configuration other than the above is the same as that of the embodiment shown in FIG. 1, the same parts are designated by the same reference numerals, and the repeated description will be omitted.

In the cylindrical roller bearing of this embodiment, when used in the inner ring rotation, the auxiliary lip portion 28 of the seal plate 20 guides the grease between the collar rings 17 and 18 and the inner peripheral surface of the cage 19a inward in the axial direction. As a result, it acts to be introduced between the end surface of the cylindrical roller 19 and the flange surface (roller guide surface) of the collar wheels 17 and 18, and the lubrication performance is significantly improved.

Further, since the inner ring 12 is composed of one collarless race ring 15 and two collar rings 17 and 18 of the same shape, machining of the race ring 15 is extremely easy as compared with the inner ring of FIG. Become.

The operation and effects other than those described above are the same as those of the embodiment shown in FIG.

In each of the above-mentioned embodiments, a seal plate is fitted to the outer ring, and the inner ring is constituted by a race ring with a collar and a collar ring, or a race ring without a collar and a collar ring, and a step surface is formed between these race rings and the collar ring. Although the case where the notch surface that reduces the diameter in two steps is formed through the above, the inner ring is provided with the peripheral groove for fitting the seal plate, and the outer ring is the outer ring and the collar ring with the collar, or, It is composed of a bearing ring without a collar and a collar ring, and a cutout surface that expands in two stages through a step surface is formed on these bearing ring and collar ring, and the mounting portion, the bent portion, and the lip portion are the same as those described above. The seal plate on the opposite side of the example may be fitted to the inner ring so as to have the same positional relationship as the outer ring with respect to the outer ring, and even in the case of such a configuration, the same as the above. The effect is obtained.

Further, the seal plate of each of the above-mentioned embodiments is fitted to the shaft end portions on both the left and right sides of the bearing, but either one of them may be selected depending on the operating conditions such as the machine on which the bearing is mounted, the type of device, the mounting position of the bearing, etc. The present invention can be applied to the case where the seal plate is fitted only to the shaft end portion.

The inner ring in the embodiment of FIG. 1 may be constituted by the collarless race ring and the collar ring of the embodiment of FIG. 2, and conversely, the inner ring of the embodiment of FIG. It may be configured by the race ring with a collar and the collar ring in the example.

[Effect of device]

As described above, in the cylindrical roller bearing with a seal of the present invention, the core metal of the seal plate fitted to at least one shaft end of the cylindrical roller bearing has the inclined portion extending outward from the mounting portion in the axial direction. A bending portion extending substantially inward in the axial direction from the end edge of the intermediate portion extending in the radial direction, and covering the tip end surface of the bending portion and the peripheral surface on the lip portion side with elastic bodies, respectively. From the tip of the bent part, place the bent part close to each other with a slight axial clearance and radial clearance between the stepped surface of the one-sided collar ring or the collar ring and the notch surface, respectively. Also has a configuration in which the tip side surface of the lip portion extending from the axially outer side in a substantially radial direction is slidably contacted with the second step surface of the collar ring with a collar or the collar ring. The ring is supported axially and radially by the bent part of the seal plate Rukoto can. Therefore, according to this invention, even if the bearing ring with a collar or the collar ring moves in the axial direction and the radial direction during the transportation of the bearing, the lip portion of the seal plate is not subjected to a large external force or impact, and the lip portion of the lip portion is not affected. It is possible not only to eliminate almost no external damage and wear but also to prevent plastic deformation. For this reason, the sealing function of the seal plate is not impaired even when the sheet is conveyed without using a special fixing jig, so that the handling time during the conveyance is simplified.

Further, according to the present invention, even when the bearing is in use, the axial and radial movements of the one-sided orbital ring or the collar ring are restricted by the bent portions of the seal plate, and the surface pressure of the lip portion of the seal plate is regulated. Is low, the amount of wear on the lip is extremely small, and a high-performance sealing effect can be maintained for a long period of time.

Further, according to the present invention, even if the raceway ring with one collar or the collar ring moves in the axial direction or the radial direction and the core metal of the seal plate comes into contact therewith, the metal surfaces do not come into contact with each other. No generation of wear debris that adversely affects the service life.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of an upper half portion showing an embodiment of the present invention, and FIG. 2 is a vertical sectional side view of an upper half portion showing another embodiment of the present invention.
FIG. 3 is a vertical sectional side view of an upper half portion showing a conventional cylindrical roller bearing. In the figure, 10 is an outer ring, 12 is an inner ring, 13 is a bearing ring with a collar, and 14
The collars 13a, 13b, 13c are the upper-stage first step surface, the lower-step second step surface, the upper-step first notch surface, and the flange-free race wheel, respectively, 17,18 brim ring, 16a, 17
a, 18a is the first step surface of the upper side of the collar ring, 16b, 17b, 18b is the second step surface of the lower side of the collar wheel, 16c, 17c, 18c is the first notch surface of the upper side of the collar wheel, Reference numeral 19 is a cylindrical roller, 20 is a seal plate, 21 is a core metal, 22 and 25 are seal plate mounting portions and bent portions, 26 is an elastic body, and 27 is a lip portion of the seal plate.

Continuation of the front page (56) Bibliographic references Sho 60-93015 (JP, U) Actual opening Sho 56-133125 (JP, U)

Claims (5)

[Scope of utility model registration request] 1. A cylindrical roller bearing in which a cylindrical roller is rotatably interposed between an outer ring and an inner ring, each of which has a flange on both axial ends, and a seal plate is attached to at least one shaft end, Any one of the outer ring and the inner ring is constituted by a combination of a single collar ring and a collar ring, or a combination of one collarless ring and two collar rings, with a single collar The outer diameter surface or inner diameter surface of at least one shaft end side of the collar of the bearing ring and the collar ring combined with it, or the outer diameter surface or inner diameter of the collar end of at least one collar ring combined with the collarless bearing ring. The surface is formed with a notched surface that reduces or expands in diameter in two steps via a step surface from the inner side to the outer side in the axial direction,
The seal plate attached to either the outer ring or the inner ring is
A cored bar formed with a bent part extending substantially inward in the axial direction from an edge of an intermediate part extending in the radial direction from a mounting part through an inclined part outward in the axial direction, and a bent part with the intermediate part of the cored bar A lip portion made of an elastic body extending in a substantially radial direction on the side opposite to the attachment portion from the connecting portion with the portion, and on the tip surface of the bent portion of the core metal of the seal plate and the peripheral surface on the lip portion side. Each of the elastic bodies is covered, and the bent portion of the core metal of the seal plate has a slight axial clearance between the outer ring and the inner ring between the first step and the notch surface. A non-contact type seal portion is formed in close proximity to the radial clearance, and a bearing ring with a collar or a collar ring is supported in the axial and radial directions to restrict movement in both directions, and The tip side surface of the lip part is in sliding contact with the second step surface to form a contact type seal part. Sealed cylindrical roller bearing according to claim. 2. An auxiliary lip portion extending axially inward of the tip of the bent portion is formed on the peripheral surface of the seal plate on the opposite side of the bent portion of the core metal, and the auxiliary lip portion is a collar. They are close to each other with a slight gap between the outer diameter surface or inner diameter surface of at least one of the collar and the collar ring of the bearing ring or between at least one outer diameter surface or inner diameter surface of the two collar rings. A cylindrical roller bearing with a seal according to claim 1 of the utility model registration claim. 3. The utility model registration claim in which the tip of the lip portion of the seal plate is molded thickly.
A cylindrical roller bearing with a seal as described in the item. 4. A cylinder with a seal according to claim 1, wherein the inclined part, the intermediate part and the bent part of the core metal of the seal plate form a space for storing grease. Roller bearing. 5. A cylindrical roller bearing with a seal according to claim 1 or 2, wherein elastic bodies are coated on both surfaces of a core bar mounting portion of the seal plate.