JPH0126405B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a cylindrical metal plate outer cylinder that holds rolling elements in a window, and a metal plate outer cylinder that is held by the metal plate outer cylinder and engages between the rolling elements. The present invention relates to a two-material window cage for rolling bearings, in particular roller bearings, with projections made of special materials.

A two-material window retainer of this kind is known (German patent no.
(Specification No. 1159215, Specification No. 1525153).
A plastic comb-shaped retainer is inserted into this metal plate outer cylinder or is engaged by means of elastically deformable means. The plastic protrusions that engage between the rolling elements and extend over the entire length of the rolling elements make it difficult for the lubricant to enter the inside of the bearing and, moreover, prevent the lubricant from entering the inside of the bearing on the one hand and the plastic protrusions on the other hand. For reasons of manufacturing technology, it is almost impossible to give the pockets between the pieces the same dimensions. The rolling elements are therefore guided only in the window of the sheet metal sleeve or only between relatively long projections, which are considered as retainers and are clamped on one side, so that the rolling elements can be guided over a wide circumferential area. The advantage of a cage enclosing the cage is lost and therefore no difference from a simple metal plate cage or a normal cage is obtained. When subjected to vibration, the long free protrusion is excited and tends to cause natural vibrations, so there is a risk of damage. Furthermore, the bending of one edge of the sheet metal sleeve and the construction of the plastic comb cage result in an asymmetrical cross-sectional shape of the entire cage, which impairs precise roller guidance.

The object of the present invention is to eliminate these drawbacks and to provide a structure in which the entry of lubricant is unobstructed, there is no risk of breakage of the projections, good rolling element guidance is ensured and simple or inexpensive manufacture is possible. The object of the present invention is to provide a two-material window cage as mentioned at the outset, which is possible.

This problem can be solved according to the present invention by providing two protrusions facing each other with an interval in the axial direction, and the protrusions on each side are integrated by a ring, and this ring is attached to the metal plate outer cylinder at the end face. The problem is solved by inserting or surrounding this metal plate sleeve.

A perfectly symmetrical cage is thus obtained, in which only the short tabs engage between the rolling elements, so that there is no risk of breakage of the tabs. Good roller guidance is nevertheless guaranteed. This is because the projections can be adjusted without difficulty in such a way that, after the desired run-in wear, they surround the rolling elements over a large circumferential area with as little play as possible. The axial spacing between the projections ensures that lubricant entry is unobstructed. It can be manufactured very cheaply. This is because only a small amount of cutting occurs. The sheet metal sleeve can be cut out of a precision tube or rolled up and welded from a sheet metal strip, and the window can then be punched out of the tube or the sheet metal that has not yet been deformed. The ring with projections can be produced, for example, with a simple injection molding tool. The ringed tab can be constructed from plastic. However, it is also possible to combine the sheet steel cylinder with a tab or a ring made of brass or the like, in which case the manufacturing costs are much lower than in the case of a metal holder.

The ring can be pushed into the metal plate sleeve. However, if the ring is made of a material that is easily elastically deformable,
The ring can have a ridge on its cylindrical outer surface that engages an annular groove on the inner surface of the sheet metal sleeve to axially fix the ring.

It is of course also possible and often advantageous to provide the annular groove on the annular outer surface and the elevation on the inner surface of the sheet metal sleeve.

According to the invention, since the protrusions are slit from the sides facing each other, high elasticity is achieved and accurate guidance of the rolling elements can be ensured with a small initial stress.

The invention will be explained below with reference to the embodiments shown in the drawings.

The cylindrical roller bearing according to FIGS. 1 and 2 has a cage, which has a cylindrical sheet metal sleeve 1, from which windows 2 are punched, and these windows form a cylinder. Hold roller 3. A plastic ring 4 is inserted into each end face of the metal plate outer cylinder 1,
Since this plastic ring has protrusions 5 that engage between the rollers 3, there are two protrusions 5 facing each other and spaced apart from each other in the axial direction between each two cylindrical rollers 3. . The ring 4 has a ridge 6 on its cylindrical outer surface which engages an annular groove 7 on the inner surface of the sheet metal sleeve 1. As is clear from the drawing, the protrusion 5 is axially slit 5a from opposite sides.

The embodiment according to FIG. 3 differs from that shown in FIG. This differs from the embodiment according to FIG.

[Brief explanation of drawings]

Fig. 1 is an axial cross-sectional view of the cylindrical roller bearing taken along the - line in Fig. 2, Fig. 2 is a sectional view taken along the - line in Fig. 1, and Fig. 3 is a modification of the cylindrical roller bearing according to Fig. 1. FIG. 1, 1a...Metal plate outer cylinder, 4, 4a...Ring, 5
... protrusion, 6 ... protuberance, 7 ... annular groove.

Claims (1)

[Claims] 1. A cylindrical metal plate outer cylinder that holds a rolling element in a window;
and protrusions made of a material having better sliding properties than the metal plate outer cylinder, which are held by the metal plate outer cylinder and engaged between the rolling elements, respectively facing each other at a distance in the axial direction. Two projecting pieces 5 are provided, the projecting pieces 5 on each side being integrated by a ring 4, 4a, which is inserted into the metal plate outer cylinder 1, 1a at the end face or surrounding this metal plate outer cylinder. A two-material window cage for rolling bearings, which is characterized by: 2. Window according to claim 1, characterized in that the ring 4 has a ridge 6 on its cylindrical outer surface, which ridge engages in an annular groove 7 on the inner surface of the metal plate outer cylinder 1 with retainer. 3. The projecting piece 5 is characterized in that a slit 5a is cut in the axial direction from the sides facing each other,
A holder with a window according to claim 1.