JPH0732982Y2 - Rolling bearing seal device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a rolling bearing seal device in which at least one of an inner ring and an outer ring has an axially separable rolling bearing which is not axially separable.

(Prior Art) Conventionally, as shown in FIG. 4, a sealing device for a rolling bearing in which at least one of the inner and outer races is axially separable has a metal ring 2 having an L-shaped cross section on the inner peripheral surface of the outer end of the outer ring 1. The inner ring 4 is fixed, and the seal 3 made of an elastic material is attached to the inner periphery of the inner ring 4 to contact the outer peripheral surface of the inner ring 4.
Is fixed to face the outer end of the cage 7 of the roller 6, and the inner ring 4
When it moves outward in the axial direction, it contacts the inner ring 5, or as shown in FIG. The bearing was prevented from separating.

(Problems to be Solved by the Invention) By the way, the above-mentioned conventional techniques have the following problems.

In order to make the bearing non-separated in the axial direction, the cage 7 of the bearing and the inner ring 5 of the sealing device are brought into contact with each other, so that an impact load generated at the time of contact is generated in the rolling portion of the bearing. It acts on a certain cage 7 and rollers 6, and may damage or deform them, which may adversely affect the performance of the bearing.

Since the metal ring 2 and the inner ring 5 of the sealing device are press-fitted and fixed, the accuracy of the outer diameter of the metal ring 2 is likely to be incorrect, and the fitting accuracy with the outer ring 1 is deteriorated. Therefore, the outer diameter of the metal ring 2 needs to be corrected by post-processing, which increases the number of steps and cost for the processing.

(Means for Solving the Problems) The present invention is intended to solve the above problems, and in a rolling bearing sealing device in which at least one of the inner and outer races is axially separable, Of the metal seal core metal fixed to the end of the ring directly opposes the side surface of the step formed on the outer side surface of the other ring so that both rings are not separated in the axial direction and the seal core is It is characterized in that a sealing portion is formed between the other bearing ring and an elastic body seal attached to a portion of the gold other than a surface facing the step portion side surface.

Hereinafter, a specific description will be given based on the illustrated embodiment. FIGS. 1 and 2 show the first embodiment, in which 10 is an integral outer ring having double-row raceways, 11 and 11 'are axially separable inner rings, 12,
12 'is a rolling element, and 13 and 13' are cages. This inner ring 11,1
Steps 11a, 11a 'are formed on the outer surface of 1', and an L-shaped cross section metal seal metal seal metal core 14, 14 'is formed on the inner surface of the end of the outer ring 10.
The outer peripheral surfaces 14a, 14a 'of the
When the 11, 11 'are moved in the axial direction, they are opposed to the stepped portions 11a, 11a' so as to contact the shoulders of the stepped portions 11a, 11a '. Reference numerals 15 and 15 'are slingers having an L-shaped cross section, and inner peripheral surfaces 15a and 15a' are stepped portions 11a and 11a.
Fixed to the outer peripheral surface of the seal, and the seals 16 and 16 'made of an elastic body are attached to the lower ends of the seal cores 14 and 14' and abutted against the lower and vertical surfaces of the slinger 15 and 15 ', and the slinger 15 and 15' upper ends. A slight gap 17, 17 'is provided between the inner peripheral surfaces of the seal cores 14, 14', and grease is filled in the seals 16, 16 '.

Next, the operation will be described. When the inner rings 11, 11 'try to move outward in the axial direction, the shoulders of the stepped portions 11a, 11a' come into contact with the tips of the other surfaces 14b, 14b 'of the seal cores 14, 14' to prevent movement.

FIG. 3 shows a second embodiment, in which a step portion 31a is formed on the outer surface of the inner ring 31, the outer peripheral surface 34a of the seal core metal 34 having an L-shaped cross section is fixed to the inner surface of the end portion of the outer ring 30, and the other surface 34b is formed. The seal 36 is fixed and is in contact with the outer peripheral surface of the inner ring 31. 32 is a rolling element and 33 is a cage.

The operation of the second embodiment is the same as that of the first embodiment.

(Effect) According to the present invention, in a rolling bearing seal device in which at least one of the inner and outer races is axially separable, the tip of the metal seal core metal fixed to the end of one race is Directly opposed to the side surface of the step portion formed on the outer side surface of the other race, both axial rings were not separated in the axial direction, and the seal core was attached to a position other than the surface opposed to the side surface of the step portion. Since the sealing portion is formed between the other bearing ring by the elastic body seal, it is possible to avoid contact between the rolling portion of the bearing (the cage and the rolling element) and the seal, and therefore the interference with the seal. Therefore, the rolling part is not damaged or deformed. Therefore, the bearing can be axially unseparated without adversely affecting the performance of the bearing.

Further, since the metal seal core bar can be brought into direct contact with the side surface of the step portion of the bearing ring, the non-separating action of the bearing can be achieved firmly and reliably. In addition, since the sealing part by the elastic body seal is not affected by the non-separating action of the bearing,
The initial sealability can be maintained. Further, since it is not necessary to use a separate member such as the inner ring of the prior art for the seal core metal, the number of parts can be reduced, the processing can be facilitated, and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a front sectional view of a first embodiment of the present invention, FIG. 2 is an enlarged view of an essential portion of FIG. 1, and FIG. 3 is a front sectional view of an essential portion of the second embodiment.
FIG. 5 is a front sectional view of a main part of a first example of a conventional device, and FIG. 5 is a front sectional view of a main part of a second example of a conventional device. 10,20,30… Outer ring, 11,21,31… Inner ring 11a, 21a, 31a… Step, 12,22,32… Rolling element 13,23,33… Cage, 14,24,34… Seal core 16,26,36… Seal

Claims (1)

[Scope of utility model registration request] 1. A rolling bearing seal device in which at least one of the inner and outer races is axially separable, and the tip of a metal seal cored bar fixed to the end of one race is directly connected to the other. Face the step side formed on the outer side of the bearing ring,
Both bearing rings are not separated in the axial direction, and a sealing portion is formed between the other bearing ring and the other bearing ring by an elastic body seal attached to a position other than the surface of the seal core bar facing the step side surface. Sealing device for rolling bearings.