JPH0658336A - Bearing seal and its manufacture - Google Patents

Abstract

PURPOSE:To hold stable fitting force and fallout resistance without any influence of the thickness of an elastomer layer, by providing the elastomer layer in which convex ribs are formed at required intervals circumferentially on one side face of a reinforcing ring made of metal, etc. CONSTITUTION:An elastomer layer 9 in which a radial pattern 9a is formed by protrusive lines, is bonded on one side face of a metal plate 8, they are fixed by presser dies 11, 12, and the elastomer layer 9 and the metal plate 8 are punched at a time with a stamping punch 13. Protrusive ribs are formed at even intervals on the surface of the elastomer layer 9 by the radial pattern, and fitting lips projected from peripheral edge of the elastomer layer 9 are formed on the protrusive ribs. Stable fitting force and fallout resistance can be held without any influence of the thickness of the elastomer layer 6, because the fitting lips 7a are projected from the peripheral edge of the elastomer layer 6 and go round to the peripheral edge of a reinforcing ring 5, in a finished product. When bearing seals are stacked, their touch area is kept small by the protrusive ribs and their mutual sticking is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing seal and its manufacturing method.

[0002]

2. Description of the Related Art The inventor of the present invention previously provided an elastomer layer 2 on one surface of a reinforcing ring 1 made of metal or the like as shown in FIGS. 8 to 10 as a bearing seal to be mounted on a bearing. We devised a bearing seal with a different structure (Japanese Patent Application No. 4-128322). A seal lip 2a is formed on the elastomer layer 2. Further, in the other figures, 3 is an outer ring of the bearing, 3a is a fitting groove formed in the outer ring 3 of the bearing, and 4 is an inner ring of the bearing.

In the bearing seal, when fitted in the fitting groove 3a, the seal lip 2a of the elastomer layer 2 wraps around the peripheral edge of the reinforcing ring 1 and thus a firm fixation can be realized. However, in the bearing seal having such a structure, the thickness of the elastomer layer 2 is greatly related to the protrusion amount of the seal lip 2a, that is, the thicker the elastomer layer is, the larger the seal lip 2a is.
Is largely protruded, and the fitting force and the drop-off strength are increased. In reality, it is difficult to make the thickness of the elastomer layer uniform, so that the fitting force and the drop-off strength eventually vary from product to product. There is a problem.

Further, when a plurality of bearing seals are overlapped with each other, the upper surface of the elastomer layer comes into close contact with the reinforcing ring of the upper bearing seal, which causes troubles during processing, storage and assembly work. There is also.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is achieved by providing a reinforcing rib on one surface of which a convex rib is circumferentially formed at required intervals. SUMMARY OF THE INVENTION It is an object of the present invention to provide a bearing seal capable of solving the above problems, and also provide a manufacturing method capable of easily and mass-producing the bearing seal.

[0006]

SUMMARY OF THE INVENTION The gist of the present invention is to provide an elastomer layer having convex ribs circumferentially formed on one surface of a reinforcing ring made of metal or the like at required intervals. The bearing seal that is provided and one side of a plate made of metal or the like are bonded with an elastomer layer on which a radial pattern or a lattice pattern is formed by ridges or grooves, which are fixed with a pressing die and punched with an elastomer. A method of manufacturing a bearing seal is characterized in that a layer and a plate made of metal or the like are punched simultaneously.

[0007]

Next, the operation of the bearing seal having the above structure will be described. When the bearing seal is fitted in the fitting groove of the bearing, the convex rib is fitted on the back side.

Further, when fitted, the fitting lip of the convex rib protrudes from the peripheral edge of the elastomer layer and wraps around the peripheral edge of the reinforcing ring, so that the thickness of the elastomer layer is not affected, and the stable fitting force and falling strength are obtained. Can be held. Therefore, there is no variation in the fitting force and the drop-off strength of the product. Further, when a plurality of bearing seals are overlapped with each other, the contact areas of the upper and lower bearing seals are kept narrow by the convex ribs, so that mutual contact is prevented.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a plan view of a bearing seal according to the present invention, and FIG. 2 is a sectional view taken along line BB in FIG.

The bearing seal according to the present invention comprises a reinforcing ring 5 made of metal or the like, on one side of which a convex rib 7 is provided with an elastomer layer 6 formed at required intervals in the circumferential direction.

As a result, when fitted, as shown in FIGS. 3 and 4, the fitting lip 7a of the convex rib 7 considerably protrudes from the peripheral edge of the elastomer layer 6 and wraps around the peripheral edge of the reinforcing ring 5. It is possible to maintain stable fitting force and falling strength without affecting the thickness of the layer 6.

Next, a method of manufacturing the bearing seal according to the present invention will be described with reference to FIGS.
First, on one surface of the metal plate 8, an elastomer layer 9 having a radial pattern 9a formed by protrusions as shown in FIG. 5 or an elastomer layer 9 having a lattice pattern 10a formed by protrusions as shown in FIG. Adhere the layer 10. Next, as shown in FIG. 7, these are fixed by holding molds 11 and 12, and in this state, punching punch 13 is used to form elastomer layer 9
Alternatively, 10 and the metal plate 8 are punched at the same time.

The layers 9 and 10 of the elastomer have a cross section.

[Outer 1] Shape and

[Outside 2] shape,

[Outside 3] It is manufactured by molding and vulcanizing with an elastomer such as rubber using a molding die in which shaped grooves are formed in a radial or lattice pattern. Further, when punching into a washer shape with a punching punch, the punching is performed in accordance with each radial pattern or lattice pattern of the elastomer layers 9, 10.

Then, as described above, the elastomer layer 9,
When 10 and the metal plate 8 are punched at the same time by the punching punch 13, convex ribs are formed at equal intervals on the surface of the elastomer layers 9 and 10 by the radial pattern and the lattice pattern by the ridges.
In addition, the convex ribs are formed with fitting lips protruding from the peripheral edges of the elastomer layers 9 and 10.

Further, in the above-mentioned embodiment, an example of using an elastomer layer having a grid pattern formed by ridges is shown. However, on the contrary, an elastomer layer having a grid pattern formed by concave grooves instead of the ridge is formed. It may be used, and in this case, a flat surface portion other than the concave groove forms a rib, and a bearing seal similar to that of the above embodiment can be obtained.

[0016]

The bearing seal of the present invention has the above-described structure and operation, and when fitted, the fitting lip of the convex rib considerably extends beyond the peripheral edge of the elastomer layer and wraps around the peripheral edge of the reinforcing ring. It is possible to maintain stable fitting force and drop strength without affecting the thickness of the elastomer layer. Therefore, there is no variation in the fitting force and the drop-off strength of the product.

Further, when a plurality of bearing seals are superposed on each other, the contact areas of the upper and lower bearing seals are kept narrow by the convex ribs, so that mutual contact is prevented. .

Further, in order to obtain a proper fitting force and drop-off strength with only the elastomer layer as in the conventional product, a considerable thickness is required and a large amount of material is required. However, in the present invention, a convex rib is formed. Moreover, since it is sufficient to provide it at several places, the amount of elastomer used can be reduced to less than half that of conventional products, which is economical.

Furthermore, since the convex ribs are used for point-wise fixing, it is possible to suppress deformation of the reinforcing ring after fitting, and in addition, fitting is facilitated, and the rib portion on the lower surface of the seal is also provided. Since it is easily deformed, it is easy to fit inside the fitting groove.

Further, according to the manufacturing method of the present invention, the bearing seal having the above structure can be manufactured easily and in large quantities.

[Brief description of drawings]

FIG. 1 is a plan view of a bearing seal according to the present invention.

FIG. 2 is a sectional view taken along line BB in FIG.

FIG. 3 is a sectional view of a fitted state of the bearing seal according to the present invention.

FIG. 4 is a side view of the bearing in which the bearing seal according to the present invention is fitted.

FIG. 5 is a perspective view of an example of an elastomeric layer.

FIG. 6 is a perspective view of another embodiment of an elastomeric layer.

FIG. 7 is an explanatory diagram of a manufacturing method.

FIG. 8 is a plan view of a conventional product.

9 is a cross-sectional view taken along the line AA in FIG.

FIG. 10 is a cross-sectional view of a conventional product in a fitted state.

[Explanation of symbols]

 5 Reinforcement ring 6 Elastomer layer 7 Convex rib 7a Fitting lip 8 Metal plate 9 Elastomer layer 9a Radial pattern by ridge 10 Elastomer layer 10a Lattice pattern by ridge 11 Suppress die 12 Suppress die 13 Punch punch

Claims (2)

[Claims] 1. A bearing seal comprising a reinforcing ring made of metal or the like, and provided on one surface thereof with an elastomer layer having convex ribs circumferentially formed at required intervals. 2. An elastomer layer having a radial pattern or a lattice pattern formed by ridges or grooves is adhered to one surface of a plate made of metal or the like, these are fixed by a holding die, and an elastomer layer is formed by a punching punch. A method of manufacturing a bearing seal, which comprises punching a metal plate at the same time.