JPH10159859A - Bearing seal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a coming-off and deformation so as to exhibit a steady sealing characteristic by forming a plurality of tongue piece parts, in each of which a substantially L-shaped slit is cut for providing flexibility, in the outer circumference part, of a reinforcing ring and protruding the tip of the tongue piece beyond the aperture of an outer ring so as to cover a seal part. SOLUTION: As a tongue piece part, 3b provided with a projection part covered by means of an elastic seal part 2 is arranged in a reinforcing ring 3 for a bearing seal, a bearing can be quickly inserted into the inside of a port part with preciseness while maintaining great flexibility based on extensible deformable elasticity of the seal part 2 filling a slit 3a. When an outer circumference part of a fitting groove 11a and the tongue piece part 3b are fixed in the fitting groove 11a in the depth, a high sealing property is exhibited by means of the seal part, 2 covering the outer circumference, while the seal part 2 is prevented from coming off as the tip of the protruded tongue piece part 3b is fitted in the groove. In this way, installation to a bearing can be facilitated while a coming-off and deformation can be prevented, and steady sealing performance can be exhibited.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing seal for hermetically sealing a bearing, and more particularly, to an improvement in the structure of a bearing seal having improved mounting and fixing properties.

[0002]

SUMMARY OF THE INVENTION The present invention relates to a rolling element (1).
c) a bearing seal which is mounted on one of the inner and outer races (1a, 1b) provided with and seals the inside thereof;
The bearing seal comprises an elastic seal portion (2) made of synthetic rubber or synthetic resin and a reinforcing ring (3) of metal or hard synthetic resin for reinforcing the seal portion.
A substantially L-shaped slit (3) is formed on the outer periphery of the reinforcing ring (3).
a) is engraved to form a plurality of tongue pieces (3b) provided with flexibility, and the tip of the tongue pieces (3b) is provided with an outer ring (1).
It is characterized in that it projects to a diameter larger than the diameter of a) and is covered with the seal portion (2). The tongue piece (3b) formed on the outer periphery of the reinforcing ring (3) is formed by a substantially L-shaped slit (3a) carved on both sides or one side thereof. ) Is characterized in that the tongue piece (3b) including the seal portion (2) is covered with the seal portion (2).

[0003]

In a conventional metal ring type bearing seal formed by punching a metal plate into a ring shape, a conventional metal seal is directly crimped into a fitting groove of the bearing. Deformation is likely to occur, and metal-to-metal contact makes it impossible to have high sealing performance. In a molding type bearing seal in which an elastic sealing material is compression-molded in a molding die, the sealing material is in close contact with the fitting groove of the bearing, so that the sealing performance is improved. It is difficult to wipe out the danger of causing a rotation with the rotating member to be slid by gradually weakening the fixing force.

SUMMARY OF THE INVENTION An object of the present invention is to provide an inexpensive bearing seal which facilitates mounting on a bearing against the above-mentioned problems, prevents detachment and deformation, and exhibits stable sealing performance.

[0005]

2. Description of the Related Art Conventionally, in a bearing seal that seals a lubricant inside a bearing and blocks dust and moisture from the outside, a metal plate is punched in a ring shape and swaged into a fitting groove of the bearing. A metal ring type bearing seal to be fitted or a molding type bearing seal in which a sealing material is put into a cavity engraved in a molding die and compression molded is used.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the drawings. As shown in FIG. 1, a flexible tongue piece (3b, 31b) is provided on the outer periphery of a reinforcing ring (3) constituting a bearing seal.
b), and the tongue piece (3b, 31b) is covered with a seal part (2) made of an elastic body because a substantially L-shaped slit (3a, 31a) is engraved on both sides or one side. However, the tip portion has great flexibility in the plane direction.

In mounting the bearing seal,
As shown in FIG. 2, when the outer periphery of the bearing seal is aligned with the mouth of the outer ring (1 a) of the bearing and is pressed into the back with the press-fitting jig (4), it projects into the mouth with a diameter larger than the diameter. The tip of the tongue piece (3b, 31b) is caught, but the slit (3) on both sides or one side of the tongue piece (3b, 31b) is caught.
a, 31a) and the sealing portion (2) that fills the slits (3a, 31a) expand and deform without affecting other portions, and when deformed beyond a certain amount, the diameter becomes equal to the diameter. And is pulled into the mouth. Here, the outer periphery of the bearing seal is first fitted into the fitting groove (11a) of the bearing seal disposed at the back, and then the tips of the tongue pieces (3b, 31b) are fitted as described above, as shown in FIG. Is securely fixed as shown in FIG. In this state, the fitting portion on the periphery of the bearing seal is a sealing portion (2) made of an elastic body including the tongue pieces (3b, 31b).
, The entire periphery thereof elastically adheres to the fitting groove (11a) of the bearing outer ring (1a), and exhibits high sealing performance.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The tongue piece (3b) provided on the bearing seal of the present invention has another shape as shown in FIG. As shown in the figure, a slit (3a) is engraved in one side from the periphery of the reinforcing ring (3) in a substantially L-shape to provide a tongue piece (31) having a high degree of flexibility.
b) can also be formed in the circumferential direction. In each case, the characteristic action and effect of the present invention can be achieved by projecting the tip of the bearing into a diameter larger than the diameter of the bearing outer ring (1a) and covering it with the seal portion (2). It will be demonstrated.

[0009]

According to the above configuration, the following excellent effects can be obtained. According to the present invention, since the tongue pieces (3b, 31b) each having a protruding portion covered with the elastic seal portion (2) are provided on the reinforcing ring (3) of the bearing seal, the bearing seal can be mounted easily. Is a slit (3
a) It is quickly and accurately inserted into the mouth while maintaining great flexibility due to the elasticity of the elasticity of the seal part (2) that fills a)
Outer peripheral portion and tongue piece (3b) of the fitting groove (11a) at the back
When the is fixed, the sealing portion (2) covering the outer periphery exhibits high sealing performance and the tongue piece (3b) protruding.
Is fitted into the groove, making it difficult to remove. As described above, according to the present invention, it is possible to provide an inexpensive bearing seal that can be easily mounted on a bearing, prevents detachment and deformation, and exhibits stable sealing performance.

[Brief description of the drawings]

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

FIG. 2 is a sectional view showing a state in which a bearing seal of the present invention is mounted.

FIG. 3 is a cross-sectional view showing a state where mounting is completed from FIG. 2;

FIG. 4 is a partial cross-sectional view showing another embodiment of the present invention.

[Explanation of symbols]

 1a Inner ring 1b Outer ring 1c Rolling element 11a Fitting groove 2 Seal part 3 Reinforcement ring 3a Slit 3b Tongue piece 31b Tongue piece 4 Press-fitting jig

Claims (2)

[Claims] 1. A bearing seal mounted on a bearing comprising an inner and an outer ring provided with a rolling element and sealing the inside thereof, wherein the bearing seal comprises a sealing portion made of an elastic body and a reinforcing ring for reinforcing the sealing portion. A plurality of tongue pieces formed by engraving a substantially L-shaped slit in the outer peripheral part of the reinforcing ring are provided at equal intervals, and the tip of the tongue piece protrudes to a diameter larger than the diameter of the bearing outer ring to form a seal. A bearing seal characterized by being coated. 2. The bearing seal according to claim 1, wherein a substantially L-shaped slit provided in an outer peripheral portion of said reinforcing ring is engraved on both sides of said tongue piece.