JPH06249245A - Cage for roller bearing - Google Patents

Abstract

PURPOSE:To secure an excellent lubricating state for a long time by making a lubricant easy to stay at a pocket surface, and enabling the lubricant to be speedily supplied to a roller. CONSTITUTION:In a cage 1 for a roller bearing made of metal with a plurality of pockets 2 formed at several points on the circumference, the inner and outer portions in the radial direction of an intermediate region A in the axial direction are projected in the circumferential direction at the pocket surface 4 of poles 3... between the adjacent pockets 2, a portion corresponding to a roller PCD of the pocket surface 4 is retracted in the circumferential direction, and the pocket surface 4 is recessed in an almost lateral V shape. Consequently, a lubricant storing space Z of an approximate triangle is formed between the circumferential surface of a roller 5 and the pocket surface 4 so that even if a lubricant oil film at the circumferential surface of the roller 5 is peeled off, another lubricant oil film is successively formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal roller bearing retainer in which pockets are punched out at several places around the circumference, and rollers are housed and retained in the pockets so that the rollers cannot slip out radially inward and outward.

[0002]

2. Description of the Related Art FIGS. 6 and 7 show a conventional metal roller bearing cage. In the figure, 50 is a retainer, 51 is a plurality of pockets, 52 is a pillar portion between the pockets 51, and 53 is a pocket surface of the pillar portion 52. In the cage 50 of the illustrated example,
Protrusions 55 and 56 that prevent the roller 54 from slipping out are provided at two locations in the radial direction inside and outside the pocket surface 53 that are axially separated. The projections 55 and 56 are formed by coining, and are provided substantially symmetrically inside and outside the roller PCD in the radial direction.

In the coining process described above, two pairs of machining tools (not shown) are inserted into the pockets 51, 51 on both sides of the pillar 52 to be machined, and the pillar 52 is pinched by the pair of machining tools. That is, the processing is to plastically deform, that is, the processing surface shape of the processing tool is transferred to the pocket surface 53 of the column portion 52.

[0004]

In the conventional roller bearing retainer 50, the projections 55 and 56 for preventing the rollers from slipping out are provided.
Spots are provided at two points on the pocket surface 53,
The roller 54 slides on the pocket surface 53 excluding the protrusions 55 and 56, but when the roller 54 contacts the protrusions 55 and 56 during rolling, the oil film formed on the peripheral surface of the roller 54 is changed. Will be partially scraped.

Even if the oil film is scraped off in this way, the roller 5
If there is a lubricant around 4 and the oil film is reformed at an early stage, there is no problem.
Has a structure in which the lubricant is less likely to collect around the rollers 54. Therefore, if the oil film of the rollers 54 is scraped off as described above, it is not possible to expect the oil film to be reformed at an early stage, and the lubrication failure tends to occur. .

In view of the above circumstances, the present invention makes it easier to collect the lubricant on the pocket surface, and also allows the lubricant to be quickly supplied to the rollers, thereby ensuring a good lubrication state for a long period of time. Is an issue.

[0007]

In order to solve such a problem, according to the present invention, pockets are formed by punching at several places on the circumference, and the rollers are housed and held inside the pockets so that the rollers cannot come out radially inward and outward. The metal roller bearing cage to be used has the following structure.

In the roller bearing cage according to the present invention, at least the radial inner and outer portions of the axially intermediate region of the pocket surface of the pillar portion between the pockets are projected in the circumferential direction, and the roller PCD of this pocket surface is accommodated. The portion to be retracted is retracted in the circumferential direction, and the pocket surface is recessed in a substantially horizontal V shape.

[0009]

The roller is prevented from slipping in and out in the radial direction at the radially inner and outer protruding portions of at least the axially intermediate portion of the pocket surface of the column portion. Further, as the roller rolls, the roller comes into contact with the pocket surface, that is, the two sloped surfaces each having a horizontal V shape, so that the guide form of this cage is a roller guide.

By the way, when the roller is in contact with the lateral V-shaped pocket surface and is rolling, a substantially triangular space which is long in the axial direction is formed between the peripheral surface of the roller and the pocket surface. This space serves as a reservoir for the lubricant. Therefore, even if the oil film on the peripheral surface of the roller is scraped off by the rolling motion of the roller, for example, at the pocket opening edge of the cage, as the roller rotates, the lubricant in the space rotates around the roller. Since the oil film is transferred and supplied to the surface and the oil film is immediately reformed, the lubrication state is kept good. The oil film is formed on such a roller every time the roller makes one rotation.

[0011]

1 to 5 show an embodiment of the present invention. In the roller bearing cage 1 of the illustrated example, pockets 2 having a substantially rectangular shape in plan view are punched out at several circumferential positions of a metal cylindrical member, and pillar portions 3 between the pockets 2 are formed.
In the pocket surface 4, the radially inner and outer portions of the axial intermediate region A are projected in the circumferential direction, and the portion of the pocket surface 4 corresponding to the roller PCD is retracted in the circumferential direction. Is recessed into a substantially horizontal V shape. The recess of the pocket surface 4 is formed by subjecting each of the plurality of pillars 3 to coining.
In addition, reference numerals 5 and 6 are attached to the radially inner and outer protruding portions of the axially intermediate region A of the column portion 3.

The protrusions 5 and 6 of the adjacent pillars 3 prevent the rollers 7 from slipping inward and outward in the radial direction. Further, in the state where the roller 7 abuts on the pocket surface 4 which is recessed in the lateral V shape and rolls, a substantially triangular space Z that is long in the axial direction is formed between the peripheral surface of the roller 7 and the pocket surface 4. The space Z serves as a reservoir for the lubricant. The lubricant in the space Z is transferred and supplied to the peripheral surface of the roller 7 as the roller 7 rolls, and the oil film is re-formed. Therefore, if the oil film on the circumferential surface of the roller 7 is, for example, the pocket 2
Even if it is scraped off by the inner and outer openings of the roller 7, the lubricant in the space Z immediately re-forms the oil film on the peripheral surface of the roller 7 as the roller 7 rotates, so that the lubrication state is improved. To be kept. The oil film is formed on the roller 7 every time the roller 7 makes one rotation.

By the way, the interval W1 between the projections 5 and 6 inside and outside the radial direction of the axial intermediate region A of the adjacent pillars 3 is set to be smaller than the diameter R of the rollers 7, and Radial inner / outer spacing W2 between the axial end regions B and C
The diameter is set to be larger than the diameter R of the roller 7. Also,
The volume of the space Z can be appropriately variably set by adjusting the dimensional difference between the interval W3 between the bottoms of the recesses of the adjacent pocket surfaces 4 and the interval W1.

For the roller bearing cage 1, for example, a strip-shaped steel plate is prepared, rectangular pockets 2 are punched and formed at predetermined intervals in the longitudinal direction, and pillars 3 between the adjacent pockets 2 are illustrated. As shown in FIG. 5, coining is performed using tools 10 and 10 to make the pocket surface 4 concave in a V shape, and then the strip-shaped steel sheet is formed into a cylindrical shape and the butt ends are welded. It

Incidentally, when the column portion 3 is coined, the protrusions 5 and 6 project in a state of being warped inward and outward in the radial direction, although they are slightly, but this projecting is not shown. .

The present invention is not limited to the above embodiment. For example, the protrusions for preventing the rollers from slipping out may be formed over the entire axial length of the pocket surface 4, or may be formed at several axial positions such as the axial intermediate region and both sides thereof.

[0017]

As described above, in the present invention, at least the axial intermediate region of the pocket surface of the pillar portion is used as the roller sliding contact surface to secure a wide sliding contact width, and the roller sliding contact surface thus wide. Since a substantially triangular lubricant storage space is provided between the roller and the roller, even if the lubricant oil film on the roller peripheral surface is scraped off by the protruding part for preventing the roller from slipping out, Along with this, the lubricant can be continuously transferred and supplied to the circumferential surface of the roller to re-form the oil film. Therefore, not only can the lubrication state of the sliding contact portion between the roller and the column portion be improved for a long period of time, but also the rolling characteristics of the roller bearing can be stabilized.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an embodiment of a roller bearing cage according to the present invention.

FIG. 2 is a sectional view taken along the line (2)-(2) of FIG.

3 is a sectional view taken along line (3)-(3) of FIG.

4 is a partial perspective view of the roller bearing cage of FIG. 1. FIG.

5 is a cross-sectional view showing a coining treatment mode in the roller bearing cage of FIG. 1. FIG.

FIG. 6 is a vertical sectional view of a conventional roller bearing cage.

7 is a sectional view taken along line (7)-(7) of FIG.

[Explanation of symbols]

 1 Cage 2 Pocket 3 Column part 4 Pocket surface 5 Radial inner side protrusion 6 Radial outer side protrusion 7 Roller Z Lubricant storage space

Claims (2)

[Claims] 1. A metal roller bearing retainer in which pockets are punched out at several places around the circumference, and rollers are housed and retained inside the pockets so that they cannot slip out in and out of the radial direction. At least the radial inner and outer portions of the axial intermediate region of the pocket surface of the pillar portion are projected in the circumferential direction, and the portion of the pocket surface corresponding to the roller PCD is receded in the circumferential direction, so that the pocket surface is substantially lateral V. A cage for roller bearings, which is characterized by being recessed in a V shape. 2. The cage for roller bearings according to claim 1, wherein the pocket surface of the column portion is plastically deformed into a substantially horizontal V-shape by coining by pinching the column portion from both sides in the circumferential direction with a working tool. A cage for roller bearings, characterized in that it is made possible.