DE1694407U - SOLID WINDOW CAGE FOR NEEDLE BEARINGS. - Google Patents

Description

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MaeBiTfeneterkäfiR for needle roller bearings

The invention relates to one-piece, massive window cages for guiding and holding needle rollers.

The appropriate design of such needle cages offers difficulties in view of the often very small needle and cage dimensions more funJctional as well as more technical Kind, needle cages are predominantly without Bearing race «installed so that the cage not only guides the needles, but also has to hold axially and radially. These conditions, as well as the possibility of more rational, more precise Manufacturing are fulfilled by the needle cage according to the invention, for its manufacture a solid ring is used, in the one from the shell side or from the bore side an annular groove of such depth is incorporated that after the punching out of the window «Between the side rings remaining cage bars in the area of the bing groove inside baw · lie outside the needle center circle, with the webs in the middle web section For the formation of Haitvorsprüngen 'whole or are partially widened. The shark ledges on the opposite side of the cage, i.e. in the case of cages with an annular groove machined from the shell side the outer ones or, in the case of cages with an annular groove machined from the bore side, the inner, will be after punching out the window

r. 1018

date

7/30/54

Name page -2

DURKOPP

from the two sides, over the Uadelmitten-'kreis extending web sections, in a known manner, by upsetting or the like. worked out.

The cage according to the invention provides the needles with good axially parallel guidance through the lateral web sections and secure, radial retention through the widened, central web section in conjunction with outer and inner retaining projections. In addition, the stepped cage bars create large grease spaces so that long lubrication periods for the bearing arise.

Another major advantage of the new needle cage is its high load-bearing capacity, due to the large number of hadels. The number of! Threads that make up a cage of certain The diameter depends on the distance between the roller window, i.e. on the width of the cage bars from, The bar width is, provided the "windows are created by punching," limited in terms of production. The stronger that too The higher the material, the higher it is the cutting pressure and the greater the risk that the webs will bend during punching. The most endangered zone is in the middle of the bridge, while the edge parts of the bridge through ■ the stiffening cage side rings are not at risk to the same extent. In addition still comes that the material arched through the

date

7/30/54

Surname

Leaf - 3 "-

B «»., No. 1018

Ι * -ι "ΐ

DÜRKOPP ι
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Sonitt stamp shape cut in the edge areas » in the middle, however, is torn off. For these reasons, with 'solid cages, with over the whole, length evenly thick webs, a relatively large penster distance necessary. In the cage according to the invention, abge-etuftem.Stegteil, however, occurs

Cutting pressure in the web edge parts, wj0 'the largest due to the cage side rings Sri «h * rfceit is given. In the endangered Stftgfcitte is the material thickness of the Cage ring only about a quarter of that Material thickness in the edge zones and thus the cutting pressure there is low. The cage bars can therefore be kept relatively narrow, i.e. the windows can be moved closer together

The drawings illustrate, on a greatly enlarged scale, two embodiments It was the object of discovery.

Pig. 2

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igt a radial section along the line AB in Fig. 2 through part of the preferred embodiment of a cage,

an axial section along the line G-D in 'Pig. I,

a top view of a cage window and

a diagrammatic representation of a web delimiting the cage window "

In the pig. 5 to 8 the same representations are selected for a second embodiment, the one exact inversion of the preferred first cage design is.

• 3 . 4th

date

7/30/54

Surname

Leaf - 4 -

Order no. 1018

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DÜRKOPP

- 4th

The one in the Pig. 1 to 4 is made of a cylindrical king, into which a central ring groove E of a trapezoidal cross-section is worked from the outer side broader, flatter singles R ¹ and R * 'are to the side of the annular groove K, also from the outer side of the rock. einearföi ^ t'et ,, so that the: Keifigring, before the punching out of the window receiving the squares, has a smooth bore and a stepped outer shape.

The windows a are like the pig. 3 shows, kept somewhat narrower in the area of the central annular groove R, so that the webs b are somewhat wider in this section and form retaining projections V lying within the needle tape circle, which secure the needles inwardly against falling out. The lateral web sections b * ^f extending beyond the needle center circle guide the needles at their ends, while the cage side rings c limit the needles in the axial direction.

On the side of the cage shell, the middle annular groove R and the lateral annular grooves R and R ¹ * form rib-like elevations d, the ends of which are pressed down a little after punching out the window a, in the direction of the window, so that retaining projections d * arise. which the needles against falling out to the outside

date

7/30/54

Surname

Bi.- '5 ·

W * - ßejt.-Nr. 1018

DÜRKOPP

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to back up. One can, however, ^{omit the lateral annular grooves R 1} and H '·' and instead produce the outer Haitevois stanchions b 'in the lateral web sections b, in a manner known per se, by seaming or rolling. For bearings with an outer race, the look of the retaining projections can even come into port, so that the cage is ready for use after the punching and the window. The cavities created by the annular grooves R, R ¹ and R ″ serve to hold lubricant.

In the cage shown in FIGS. 5 to 8, the annular grooves R, H 'and R ¹ ' are worked into the ring from the bore side the holding projections b 'formed by the widened web center section secure the needles to the outside and the holding projections d ¹ diff created by a special operation after the punching out of the window a take over the radial securing of the needles to the inside.

In the case of very small cage diameters, the result is i! «, r 'execution according to Fig. 5 to 8 manufacturing

rigkditen through the required Cut-off plate profiling. As the cutting board ia dt «cage bore must be drilled, it is with a small bore diameter of course, much more useful if that

date

7/30/54

Surname

Leaf - 6 -

DÜRKOPP

Cutting plate can be designed as a smooth mandrel »as is the case with the cage construction according to FIGS. 1 to 4 of the Pail. The second embodiment is available as * ·; imr limited _t particularly for larger Hadelkäfige, useful.

Claims

date

7/30/54

Name page - 7 -

Wd. Order no. 1018

Claims (1)

1· 2. 3. Maasiv window cage for needle bearings »thereby characterized in that the middle part of the solid ring used for its manufacture an annular groove of such depth machined from the shell side or from the bore side has that the remaining after punching out the window between the cage side rings The cage bars in the area of the groove lie inside or outside the needle center circle, with the cage bars in this middle bar section for the formation of Haitvorsprüngen whole or are partially widened * Solid window cage according to claim 1, characterized in that the central annular groove (R) has a trapezoidal cross-section. A passive window cage according to Afcspruch 1 and 2, ^{characterized in that outer and inner retaining projections (b 1} ) are worked out from the two lateral sections (b ^ft ) of the cage webs (b) that extend beyond the needle center circle. iSassive window cage according to claim 1 to 3, characterized in that the lateral web sections (b '') are offset in such a way that rib-like elevations (d) are created, the ends of which are upset to form outer or inner retaining projections (d ¹ ) » date 7/30/54 Wd. Order no. 1018