JPH0765622B2 - Rolling bearing sealing device assembly structure - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a sealing device for a unit type rolling bearing having a flange on an inner ring or an outer ring. Specifically, it facilitates assembly of a sealing material and improves durability. The present invention relates to a sealing device assembly structure.

[Conventional technology]

Conventionally, in the assembly of rolling bearings, the inner and outer rings are largely eccentric, the rolling bodies are inserted between them, and then the rolling bodies are evenly arranged and the cages are mounted and assembled. When mounting a sealing body that shuts off the inside and outside of this, in the case of a rolling bearing having a flange on the outside, there is no means or space to mount it after assembling, so there is no space for mounting the rolling bearing on the inner ring or outer ring before assembling in advance. Must be assembled. Hereinafter, a detailed description will be given with reference to the drawings.

As a structure of such a sealing body, as shown in FIG. 4, a sealing body 4 is generally attached to an outer ring B3 and slidably contacts an opposing inner ring B1 to generate a sealing force.

[Problems to be Solved by the Invention]

However, the seal body 4 as described above is pre-mounted before the rolling bearing B is assembled due to the structure of the rolling bearing B having the flange b. When sealed, the seal body 4
Has a structure in which the seal lip 1 slidingly contacting the inner ring B1 of the inner ring B1 is deformed greatly due to the eccentricity and permanent deformation or damage may occur. Therefore, the seal body 4 has a large eccentricity of the inner ring B1 and the outer ring B3. A flexible shape or material that can follow is required, and there is a big defect that the shape and material of the seal lip 1 are greatly restricted.

The present invention has been made in view of such drawbacks, and an object thereof is to provide a sealing device assembly structure for a rolling bearing which is excellent in assembling properties of the bearing and exhibits high sealing performance.

[Problems to be Solved by the Invention]

INDUSTRIAL APPLICABILITY The present invention, as shown in the drawings, includes an inner ring that sandwiches a rolling element B2.
A sealing device assembling structure for a rolling bearing B comprising a B1 and an outer ring B3, and one or both of which is provided with a radial flange b, wherein the sealing device of the assembling structure has an outer peripheral side as shown in FIG. It has a divided structure of the member A1 and the inner peripheral member A2 and is formed into a substantially L-shape a which faces each other. That is, after the outer ring B3 fitted with the outer peripheral member A1 in advance, the rolling body B2, and the inner ring B1 in which the inner peripheral member A2 is loosely fitted to the inner portion, are assembled,
It is characterized in that the inner peripheral member A2 is moved outward to be axially attached to the inner ring B1 so that the sealing body A is assembled and integrated.

At this time, the dimension in which the inner ring B1 is free in the radial direction after mounting the outer peripheral member A1 on the outer ring B3 must be larger than the eccentric dimension for inserting the rolling body B2, and similarly the inner peripheral member A2 is also. When it is loosely fitted to the inner ring B1, it must have a free dimension larger than the eccentric dimension.

[Action]

The present invention exerts the following excellent effects with such a configuration.

That is, when the rolling bearing B is assembled, the outer ring is previously
Attach the outer peripheral member A1 to B3 and the inner peripheral member A2 to the inner ring.
It is loosely fitted inside B1, and then the inner and outer rings B1 and B3
The rolling element B2 is inserted with eccentricity, but at this time, the outer peripheral side member A1 and the inner peripheral side member A2 allow the mounting eccentricity amount of the inner ring B1, so that a large force that inhibits the eccentricity does not work very easily. The rolling element B2 can be arranged, and the seal lip 1 extending in the axial direction does not receive a strong force from other parts. From this state, as shown in FIG. 2, the inner peripheral side member A2 loosely supported by the inner ring B1 is moved to the normal position of the inner ring B1 and axially attached to complete the sealed body A.

At this time, when it is difficult to insert the fitting device from the outside due to the flange b located on the outside, a mounting jig passing between the rolling bodies B2 is used to move the inner peripheral member A2 from the inside toward the outside. By pushing it in, there is no slip fit to the normal position.

The sealed body A thus mounted and combined keeps a good contact shape and an appropriate contact pressure on the seal lip 1, and can be easily assembled without a limit flexibility as in the prior art to provide a strong seal. Power and excellent durability are now demonstrated.

〔Example〕

In carrying out the present invention, the combined shape of the outer peripheral member A1 and the inner peripheral member A2 is formed into a substantially L shape a and combined so as to face each other, and the seal lip 1 provided on one side is The structure shown in FIG. 1 is in sliding contact with the radial portion of the inner peripheral member A2, and in FIG. 3 is in contact with the radial portion of the outer peripheral member A1.

〔The invention's effect〕

As described above, according to the present invention, when the rolling bearing B is assembled, the divided sealing bodies A are separately assembled, so that not only good mountability is obtained, but also the degree of freedom in design is increased and sealing performance is improved. It is a revolutionary rolling bearing sealing device assembly structure that has succeeded in greatly improving durability.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing a state in which the sealed body of the present invention is mounted. FIG. 2 is a partial sectional view showing the state up to FIG. FIG. 3 is a partial sectional view showing another embodiment of the sealed body of the present invention. FIG. 4 is a sectional view showing a conventional rolling bearing and a seal body. A ... Sealing body, A1 ... Outer side member, A2 ... Inner side member, a ... Almost L-shaped, B1 ... Inner ring, B2 ... Rolling body, B3 ... Outer ring, b ...
Flange, 1 ... Seal lip

Claims (1)

[Claims] 1. A sealing device assembly structure for a rolling bearing B, comprising an inner ring B1 and an outer ring B3 sandwiching a rolling element B2, and one or both of which has a radial flange b; Each of the side members A1 and the inner peripheral member A2 is formed into a substantially L-shape a which faces each other, and one of them is provided with a seal lip 1 which is slidably contacted with a radial portion of the mating member A1 or A2. After assembling the outer ring B3 fitted with the outer peripheral member A1, the rolling body B2, and the inner ring B1 having the inner peripheral member A2 loosely fitted to the inner part, the inner peripheral member A2 is mounted outward. 1. A rolling bearing sealing device assembling structure, characterized in that the sealing body A is assembled and integrated by axially attaching the sealing body A to the inner ring B1.