JPH06159370A - Unhulled-rice removing cage for roller - Google Patents

Abstract

PURPOSE: To provide a retaining projection to ensure an operation with no bearing noise and a smooth engagement of roller. CONSTITUTION: The retaining projection 3 has a stepped cylindrical portion 10 cooperative with an outer periphery 11 of an end surface concaved portion 14 of a roller and an inclination surface 4 starting from the outer surface 8 of a side ring or a roller guide surface 6 and inclined at an edge surface 5 of the retaining projection 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention is formed in side rings for engaging side rings on both sides, and webs located between the side rings and the end recesses of the rollers that fit into the pockets. The present invention relates to a fir-removed cage for rollers made by cutting, which has a retaining projection.

[0002]

2. Description of the Prior Art A cage having a retaining projection, which is already formed into a final shape, for engaging an end face recess of a roller before fitting the roller into a pocket is disclosed in German Patent No. 271.
It is known from Japanese Patent No. 2834. This allows the cage to be made without fir. No additional shaping is required.
This known cage is made, for example, of steel and can therefore be hardened. In this case, the rollers must be fitted in a snap-like manner, in which case the retaining projections must be displaced by elastic deformation of the side ring parts. The holding projection has a rectangular cross section, which often causes a problem in that the roller cannot be fitted smoothly. Furthermore, the edges of the retaining projections are scraped by the circumference of the roller recess during a given operation. This causes noise, which causes a problem that it changes after abrasion and normal roller guidance cannot be performed.

Furthermore, German patent application No. 40
In 09172.4 it is proposed to utilize a compound tool for machining pockets in metal cages. This compound tool simultaneously processes a holding projection for holding the roller in the end face recess. The tool moves in an elliptical orbit by superimposing circular motion and linear motion.

[0004]

SUMMARY OF THE INVENTION The object of the invention is to ensure a noise-free operation of the bearings and a smooth fit of the rollers in a de-firing cage for rollers made by machining of the type mentioned at the outset. It is to provide such a holding protrusion.

[0005]

According to the invention, it is an object of the invention to provide, in a fir-release cage for a roller of the type mentioned at the outset, the retaining projections cooperating with the circumference of the roller end face recess. It is achieved by having a stepped cylindrical surface portion and an inclined surface which is emitted from the circumferential surface of the side ring or the roller guide surface and is inclined at the end surface of the holding projection.

The stepped cylindrical surface portion of the holding projection is located at the portion of the maximum rising amount of the inclined surface in the radial direction with respect to the cage, and therefore performs the roller holding function here.
The curvature does not necessarily have to match the curvature of the inner peripheral surface of the end face recess of the roller. This creates a corner-free contact surface or guide surface and prevents premature wear and loud noise generation. The inclined surface is inclined with respect to the guide surface for the roller end surface of the side ring and joins the end surface of the holding projection. As a result, the roller can be easily inserted, and the retaining projection expands until it is snapped into the recess on the end surface of the roller due to the elastic deformation of the side ring.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments in which these and other features are shown in the drawings will be described below. The figures show only those parts which are important for the understanding of the invention.

FIG. 1 shows a cage with side rings 1 on both sides and a web 2 located between them.
The cage is machined from a tubular member of bronze material. The pocket 13 is processed by a lathe. The side ring 1 is provided with a holding projection 3 forming an inclined surface 4 for holding the cylindrical roller on the end surface. The end surface 5 of the holding projection 3 having the inclined surface 4 has one sawtooth-shaped inclination in cross section. The inclined surface 4 extends from the outer peripheral edge of the guide surface 6 formed on the side ring 1 for guiding the cylindrical roller 7 or the inner peripheral surface 8 of the cage, and holds the holding projection 3 that performs a holding function.
To the border edge 9 of. As can be seen from FIG. 3, the boundary edge 9 has a curved shape when viewed from the axial direction, and the cross section together with the inclined surface 4 has a substantially semi-elliptical shape or a water drop shape as a whole. The boundary edge 9 is formed with a stepwise cylindrical surface portion 10 which is curved in conformity with the recess 14 of the cylindrical roller 7 and extends in the axial direction. This cylindrical surface portion 10 cooperates with the inner circumference of the recess 14. The web side guide surface 12 for the cylindrical roller 7 is curved in a concave shape as shown in FIG.

When the cylindrical roller 7 shown in FIG. 2 is fitted into the pocket 13 shown in FIG.
Comes into contact with the inclined surface 4 that inclines toward the end surface of the cylindrical roller 7 as the insertion into the pocket 13 progresses. When the cylindrical roller 7 is further inserted, the holding protrusions 3 and 3 facing each other are expanded by elastic deformation of the side ring portions 1 and 1, and the maximum axial length portion of the cylindrical roller 7 passes through the position of the holding protrusion 3. Finally, as shown in FIG. 3, the retaining projections 3 snap into the recesses 14 on both sides of the cylindrical roller 7.

In this embodiment, the holding projection having the inclined surface with respect to the cylindrical roller to be fitted from the inner side in the radial direction is shown, but the cylindrical roller is fitted from the outer side in the radial direction by reversing the radial direction. You can also

[0011]

According to the cage according to the present invention, the roller can be easily snapped into the retaining projection of the pocket, and no noise is generated even during the operation of the bearing. .

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of a fir-free retainer having a holding protrusion for a cylindrical roller.

FIG. 2 is a partially cutaway side view of a cylindrical roller having a recess formed on an end surface.

FIG. 3 is a partial cross-sectional view of the cylindrical roller of FIG. 2 assembled in the cage of FIG.

[Explanation of symbols]

 1 side ring 3 holding protrusion 4 inclined surface 5 guide surface 6 roller guide surface 8 inner peripheral surface of side ring 10 cylindrical surface portion 14 recess

Claims (3)

[Claims] 1. A side projection having a pair of side rings and a retaining projection formed on the side ring for engaging with a web disposed between the side rings and an end surface recess of a roller fitted in the pocket. In the fir-removed cage for rollers made by the cutting process, the retaining projection (3) is
Emitted from the stepped cylindrical surface portion (10) cooperating with the circumference (11) of the roller end surface recess (14) and the circumferential surface (8) or roller guide surface (6) of the side ring (1). Retaining projections (3)
And a sloping surface (4) which is inclined at the end surface (5) of the roller. 2. Fir-removed cage for rollers according to claim 1, characterized in that the inclined surface (4) and the end surface (5) extend in one plane. 3. A retaining projection (3) with an inclined surface (4),
It is assumed that the cross section in a plane parallel to the end face, which starts from the circumferential surface (8) of the side ring (1) and is curved in the range of the end face recess (14) of the roller, is substantially elliptical. The fir-removed cage for rollers according to claim 1 or 2.