JPH0655670A - Bearing seal and manufacture thereof - Google Patents

Abstract

PURPOSE:To provide a bearing seal for sealing a bearing wherein a reinforcing plate and an elastic sealing member which are integral with each other is formed by a blanking method to protrude a seal lip and at the same time a bent section is formed on the lip. CONSTITUTION:A reinforcing plate integral with an elastic sealing member is formed by a blanking method and at the same time a lip 4 protruding from the periphery of a reinforcing ring 3a is formed and a curved shape 5 is formed on a flat section of the lip 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing seal which can be continuously formed in a large amount and is excellent in overall strength and adherence to a bearing without the need for post-treatment, and a manufacturing method thereof.

[0002]

2. Description of the Related Art Conventionally, a bearing seal mounted on a bearing has a reinforcing ring formed in a desired ring shape and a sealing member having a seal lip. A sealing member made of was vulcanized and molded to obtain a bearing seal having a desired shape.

[0003]

However, in the molding process of the bearing seal as described above, a complicated process such as supplying a reinforcing material and a sealing material into a mold and molding, and then taking out a molded product is required. This is necessary, and since the excess sealing material always forms a burr on the outside, and this burr is taken out together with the molded product, a troublesome removing step of the burr is required. Hereinafter, a detailed description will be given with reference to the drawings.

In order to eliminate such a problem, FIG.
As shown in Japanese Patent Laid-Open No. 54-68882, a punching type manufacturing method for obtaining a bearing seal composed of a reinforcing ring 7 and a seal ring d by punching the elastic sealing material b together with the reinforcing plate a with the press punch 1 at the same time. Is being developed and implemented.

However, such a bearing seal has a drawback in that its mechanical strength cannot be increased because it is stamped from a plate material to form the lip portion 4 and shaped into a flat shape. In order to eliminate this drawback, it is necessary to increase the thickness of the reinforcing ring 7 or use an expensive plate material having high hardness, which is disadvantageous in terms of workability and cost. In addition, the flat shape selects a mounting space and narrows the degree of freedom in designing other members. In view of such drawbacks, the present invention has an object to provide a bearing seal having dramatically improved moldability and high strength.

[0006]

The present invention will be described with reference to the drawings. As shown in FIG. 1, a bearing seal attached to a bearing that rotates relative to and sealing the bearing is a reinforcing plate made of metal or the like. Elastic sealant b on one side of a
After the elastic sealing material b or the elastic material c is adhered or removably attached to the other surface, the press punch 1 punches it to obtain a bearing seal, and the peripheral edge of the punched elastic sealing ring 2b is reinforced. It is characterized in that the lip portion 4 protruding from the peripheral edge of the ring 3a is formed, and at the same time, the bearing seal is curvedly formed 5 in an annular shape.

A method of manufacturing a bearing seal mounted on a bearing to hermetically seal the inside and the outside thereof, wherein an elastic sealing material b is formed and fixed on the upper surface of a reinforcing plate a made of metal or the like, and an elastic sealing material b is formed on the lower surface. Alternatively, after the elastic material c is adhered or detachably attached, it is punched by the press punch 1 and the punched upper surface elastic sealing ring 2 is punched.
At the same time as forming the lip portion 4 protruding from the peripheral edge of b, the elastic sealing ring 6b or the elastic ring 6c on the lower surface is formed.
The bearing seal is bent in an annular shape by the pinching deformation of
It features a manufacturing method that is formed at most.

[0008]

The present invention has the above-described structure and exhibits the following excellent effects. That is, according to the present invention, an elastic sealing material b made of an elastic material such as synthetic rubber is fixed in advance on the surface of a reinforcing plate a such as a thin plate or a band plate, and this is punched by a press punch 1 to form a peripheral edge of the elastic sealing ring 2b. A bearing seal having a lip 4 as shown in FIG. 1 is obtained.

An elastic sealing ring 2b similar to the upper surface or an elastic ring 6c as shown in FIG. 3 is formed on the lower surface of the bearing seal.
Since the bearing seal is squeezed by the elastic sealing ring 6b or the elastic ring 6c on the lower surface to be depressed and deformed from the cut portions on the inner and outer peripheral sides, the cutting deformation is clearly left on the punched bearing seal. An annular curve 5 is formed in the overall shape.

[0010]

EXAMPLE In the practice of the present invention, the elastic sealing material b or elastic material c disposed on the lower surface of the reinforcing ring a is selected from materials having elasticity if the main purpose is to make the curve 5 bend. Instead, as shown in FIG. 3, the curve 5 may be formed and then removed. Going further, the elastic ring 6c
Can be a plastic coating or a cycle part.

With respect to the degree of bending of the curve 5, bending can be performed at various angles by adjusting the punching speed of the press punch 1 or the gap between the upper and lower punches in addition to adjusting the thickness of the elastic material c.

[0012]

According to the present invention, the rigidity of the bearing seal is remarkably increased by the curved shape 5, and even when the bearing is fixed to the bearing, the strong fixation is realized with a high falling load. The bearing seal A has a very useful shape and manufacturing method in a seal member for a very small place such as a miniature bearing, and can be mass-produced at low cost. Further, the curved 5 shape saves space in the bearing in the arrangement relationship of the retainer and the like.

[0013]

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the manufacturing method of the present invention.

FIG. 3 is a sectional view showing another embodiment of the present invention.

FIG. 4 is a cross-sectional view of a conventional example that does not use the present invention.

[0014]

[Explanation of symbols]

 a Reinforcement plate made of metal or the like b Elastic sealing material c Elastic material 1 Press punch 2b Elastic sealing ring 3a Reinforcing ring 4 Lip part 5 Curvature 6b Lower elastic sealing ring 6c Lower elastic ring

Claims (2)

[Claims] 1. In a bearing seal mounted on a bearing to seal the inside and outside thereof, an elastic sealant b is formed and fixed on one surface of a reinforcing plate a made of metal or the like, and an elastic sealant b or elastic material c is attached to the other surface. When the bearing seal is obtained by punching with the press punch 1 after adhering or releasably attaching the same, the punched elastic sealing ring 2b forms a lip portion 4 protruding from the circumferential edge of the reinforcing ring 3a, and at the same time, the bearing is formed. The seal is curved in an annular shape 5
A bearing seal characterized by being hardened. 2. A method of manufacturing a bearing seal mounted on a bearing to seal the inside and outside thereof, wherein an elastic sealing material b is formed and fixed on the upper surface of a reinforcing plate a made of metal or the like, and an elastic sealing material b or an elastic material is attached on the lower surface. After the material c is adhered or removably attached, it is punched by the press punch 1 to form the lip portion 4 protruding from the peripheral edge of the punched upper surface elastic sealing ring 2b, and at the same time,
A method of manufacturing a bearing seal, characterized in that the bearing seal is formed by curving the annular seal 5 by deforming the elastic sealing ring 6b or the elastic ring 6c on the lower surface.