JPH09303410A - Creep preventing device for rolling bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sealing device for a rolling bearing, capable of realizing creep prevention surely and inexpensively. SOLUTION: The creep, in the engaging surface between an outer wheel 2 and a housing 9 can be prevented, by providing the cauked part 7 of a seal 4 with caulkedly fixed to an outer wheel 2, and the optional place of the caulked part 7 to be caulkedly fixed is notched to form a fitting hole 8, and while a fitting projection 10, fitted to a fitting hole 8, is protrudedly provided on the bottom part inner wall surface 11 of the housing 9, to be fitted to the fitting hole 8 of the seal 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing creep which occurs in a fitting surface between an outer ring and a housing in a rolling bearing.

[0002]

2. Description of the Related Art Conventionally, a creep prevention device of this type includes a device using a creep retaining ring that utilizes a wedge action with a housing or a device that uses a difference in expansion coefficient by winding a resin band around an outer ring. Are known.

[0003]

However, although the above-mentioned prior art is sufficient in terms of the rotational torque between the outer ring and the housing to prevent creep, it cannot be expected to prevent creep when vibration conditions are added to it. there were. That is, although the creep retaining ring is inexpensive from the viewpoint of cost, it uses the wedge action between the creep retaining ring and the housing as described above, so that the housing is often deformed to prevent creep. There was a problem with reliability, and there was also a problem that the housing was scraped. Further, even in the case of a resin band, the reliability of preventing creep is similarly low and the cost is high, so that the productivity is poor.

As a result of repeated research, the present inventor has succeeded in preventing creep reliably and inexpensively by improving the sealing portion and the inner wall of the housing bottom portion facing the sealing portion.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a rolling bearing sealing device capable of reliably and inexpensively preventing creep. is there.

[0006]

In order to achieve the above-mentioned object, the technical means of the present invention is to provide a rolling bearing having an edge of a sealing portion fixed to an outer ring by caulking. A fitting hole is formed by cutting out an arbitrary portion of an edge portion of the portion, and a fitting protrusion that fits into the fitting hole is provided on an inner wall surface of the bottom of the housing so as to project the fitting protrusion into the fitting hole of the sealing portion. Is to be fitted to.

[0007]

[Operation] By inserting the fitting protrusion protruding from the inner wall surface of the housing bottom into the fitting hole of the sealing portion which is caulked and fixed to the outer ring, no slippage occurs at the fitting surface between the outer ring and the housing. .

[0008]

An embodiment of the present invention will be described below with reference to the drawings. The creep prevention device of the present invention is applied to all cases in which creep is a problem in the case of outer ring rotation load, inner ring rotation load, direction indefinite load, or static load, and is appropriately selected within the scope of the present invention. It

The illustrated example shows a rolling ball bearing in which rolling elements (balls) 3 are arranged between an inner ring 1 and an outer ring 2 and a sealing portion 4 made of a seal is provided. In addition to the above-mentioned seal, a shield may be used for the sealing portion 4.

The sealing portion 4 is composed mainly of an elastic body 6 such as rubber.
And a curl portion 5a on the periphery thereof, and the elastic body 6 covers the curl portion 5a in a bulging manner. The caulked portion 7 is formed around the caulked portion 7. In the present invention, the caulked portion 7 is notched at any position and the fitting hole 8 is formed.
Is formed. It should be noted that the configuration other than the fitting hole 8 is not limited to the illustrated example at all, and can be changed to a known sealing portion structure and is arbitrary.

One or a plurality of fitting holes 8 are formed in the circumferential direction of the crimped portion 7, and the shape and the number of the fitting holes 8 are arbitrary. It is assumed that the shapes and the number of arrangements are such that they fit together. And
The crimped portion 7 is crimped and fixed to the outer ring 2. Further, due to the caulking of the caulked portion 7 of the sealing portion 4, the starting torque between the outer ring 2 and the sealing portion 4 is 1000 kg · c.
m or more.

The housing 9 has a fitting projection 10 that fits in the fitting hole 8 of the sealing portion 4 at an arbitrary position on the inner wall surface 11 of the housing bottom (opposing the fitting hole 8 and the fitting hole 8). A position where it can be fitted inside) is provided so as to project in the axial direction. Then, the fitting protrusion 10 is fitted into the fitting hole 8 of the sealing portion 4 to prevent slippage at the fitting surface between the two.
Further, the fitting protrusion 10 is provided in accordance with the fitting hole 8 formed in the crimped portion 7 of the sealing portion 4, and the shape and the number of the fitting protrusions 10 are not limited and are arbitrary.

Although not shown in the drawing, the fitting projection 1
0 is formed in a taper shape (tapered in the axial direction),
The fitting hole 8 may be formed in a tapered shape that matches the tapered fitting protrusion 10. With this configuration, the fitting operation becomes extremely smooth.

Further, although the fitting projection 10 is formed in a substantially cylindrical shape in this embodiment, it is merely an embodiment and the invention is not limited to this. For example, it may be appropriately changed to another arbitrary shape such as a prismatic shape. It is possible.

FIG. 5 shows another embodiment of the fitting protrusion 10. That is, instead of projecting a part of the bottom inner wall surface 11 as in the above-described embodiment, the screw 1 is inserted from the outside of the housing 9.
Alternatively, a protrusion such as 2 may be attached and the tip 12a thereof may be axially projected from the bottom inner wall surface 11 side by a desired length.

Therefore, the fitting hole 8 of the sealing portion 4 which is caulked and fixed to the outer ring 2 and the fitting projection 10 (12a) protruding from the inner wall surface 11 of the bottom of the housing 9 are positioned, and When both 8 and 10 (12a) are fitted together, the fitting projection 10 (12a) of the housing 9 is fitted between the rising walls 7a and 7a of the crimped portions 7 and 7 located on both sides in the fitting hole 8. ) Is fitted, the outer ring 2 does not move at all in the circumferential direction, so that the outer ring 2 does not slip on the fitting surface between the outer diameter surface 2a and the receiving seat 9a of the housing 9.

[0017]

According to the present invention, which is constructed as described above, the fitting projection provided on the housing is fitted into the fitting hole provided in the sealing portion which is caulked and fixed to the outer ring.
Since the outer ring does not move in the circumferential direction at all, slippage does not occur at the fitting surface between the outer ring and the housing. Therefore, reliable creep prevention can be expected at the fitting surface between the outer ring and the housing of the rolling bearing.

Therefore, unlike the prior art in which special parts are used or the structure is specially processed, the simple structure as described above ensures a secure fit between the outer ring and the housing in the rolling bearing. Since creep prevention can be expected, it is possible to provide a rolling bearing sealing device that is very inexpensive and effective in preventing creep. Further, unlike the prior art, the structure is not such that a force is directly applied to the outer ring, so that there is no adverse effect on the movement in the axial direction at the time of fitting, and the elongation of the shaft can be easily adapted. For the same reason, it can be used as a normal bearing, and a conventional product supply device such as a parts feeder can be used.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of a creep preventing device for a rolling bearing according to the present invention.

FIG. 2 is a vertical sectional side view showing an enlarged main part (fitted state).

FIG. 3 is a partially longitudinal front view showing an enlarged main part (fitted state).

FIG. 4 is a partial vertical perspective view showing a fitting hole forming portion.

FIG. 5 is a perspective view showing another embodiment of the fitting protrusion with a part thereof cut away.

[Explanation of symbols]

 1: Inner ring 2: Outer ring 4: Sealing part 7: Crimped part 8: Fitting hole 9: Housing 10 (12a): Fitting protrusion

Claims (1)

[Claims] 1. A rolling bearing having an edge portion of a sealing portion crimped and fixed to an outer ring, wherein an arbitrary portion of the edge portion of the sealing portion which is crimped and fixed is cut out to form a fitting hole.
A creep preventing device for a rolling bearing, wherein a fitting protrusion that fits in the fitting hole is provided on an inner wall surface of the bottom of the housing, and the fitting protrusion is fitted in the fitting hole of the sealing portion.