FR2479380A1 - FREE WHEEL COUPLING DEVICE - Google Patents

Abstract

FREE-WHEEL COUPLING DEVICE OF THE TYPE INCLUDING A CAGE INCLUDING GUIDING ALVEOLES AND / OR MAINTAINING A PLURALITY OF LOCKING ELEMENTS ARRANGED BETWEEN A CYLINDRICAL TRACK AND A TRACK EQUIPPED WITH A SERIES OF RAMPS, CHARACTERIZED IN THAT THE CAGE INCLUDES AT LEAST ONE DEPRESSION AND OR PROTUBERANCE, OBTAINED BY DEFORMATION, AND EXTENDING RADIALLY FROM ITS CYLINDRICAL WALL TO CONSTITUTE A LANDING SPAN ON AT LEAST ONE OF THE FOREGOING PATHS.

Description

2479380O

The present invention relates to a freewheel coupling device and relates more particularly to the cage of such a coupling.

It is often necessary to associate with such ac-

couplings at least one rolling or friction bearing

to support the radial load, when the device

freewheeling.

We already know such realizations in which

the aforementioned bearings are obtained by extending axially-

either the ring carrying the ramps to make a

min of rolling, or the cage to provide it with bearing surfaces The aim of the present invention is to simplify the production of such devices by proposing a cage for holding the wedging elements shaped so as to present such bearing surfaces, said type cage

comprising guide and / or holding cells for a greater

reality of wedging elements arranged between a path oylin-

drique and a path provided with a series of amps, being characterized

laughed at in that it includes at least one depression and / or-

protuberance, obtained by deformation, and extending radially-

ment relative to its cylindrical wall, to constitute a

bearing range on at least one of the aforementioned paths.

According to a first embodiment of this present

vention, the centering of the cage on the other path is ensured

by its radial edges.

Other advantages and characteristics of the present

te invention will appear more clearly following the des-

following description of two embodiments given uni-

only as examples and shown in the accompanying drawings in which:

- Figure 1 shows in radial section, a device for

coupling according to the inventiono - figure 2 represents a portion of the coupling cage of figure 1o - figure 3 partially represents, a variant of the

Figure 2 cage.

The freewheel coupling device represents

tee in Figure 1, in the locked position, consists of

a cage 1 with cells 3 for holding and / or guiding a greater

reality of wedging elements 5 formed by rollers or needles, and arranged between a cylindrical inner path 7 carried by a shaft 9 for example, and an outer path II having a circular series of wedge ramps 13

worn by a ring 15 for example, the stress on po-

blocking position of the wedging elements being ensured

thanks to an external radial tongue 17 attached or de-

cut in the cage, and the end of which cooperates with an elastic support constituted by a spring 19 disposed against the radial wall 21 of an axial groove 23 formed in the ring 15, it being understood that other means of biasing in position

blocking can be used.

2 shows partially, the cage 1 according to the invention obtained by cutting, without removing chips, a section of tube or a flat t8le, to achieve the

cells 3, the longitudinal sides 24 of which have lans

substantially radial lookouts 25 of opposite orientation, des-

for retaining and guiding the wedging elements, the cylindrical wall 26 of the cage also being subjected jet in lu. lX1 t dea largQur it

-a etune opera don e die ormati'on a Froid, with discovery-

pe or not according to the diameter of the elements 5, to create between two consecutive cells for example, a radial depression which internally extends the wall 26 by a bowl 27 with oblique side walls 28 which are connected to a bottom 30 in the form of a pad dimensions close to those of the cells of the cage, the ends of which end in flanges

radials 29 oriented outwards, said pads, in the name

bre of three for example, preferably regularly distributed over the periphery of the cage, constitute bearing surfaces on the cylindrical path 7, centering on the. outer ring, and more precisely on the portions 31 of the latter, located between two consecutive ramps, being provided by the aforementioned flanges of the cage which thus fulfills the function of

friction bearing, supporting the radial load when the

freewheeling.

It is clear from the above description

that the invention makes it possible to use the usual technique for manufacturing a rolling cage by cutting and deformation of a strip or of a section of tube of relatively small thickness, in order to produce an economical cage for free wheel

mant also bearing, without having to extend it axially au-

beyond the edges * If the diameter of the wedging elements allows, it is possible, as shown in Figure 3, to deform

the cylindrical wall 26 of the. cage 1 so as to obtain,

placed either on either side of a cell 3, or between two

consecutive alveoli, a protrusion-depression couple for-

mé respectively, and as described above, a bowl 27 provided with a pad 33 oriented this time radially outward, followed by another comprising a pad 30 oriented inwardly, ensuring when the device operates in

freewheeling, centering of the cage in pairs of shoes on the

bre of three for example, regularly distributed, and this, on the one hand on the aforementioned portions 31 of the outer ring, and

on the other hand on the inner cylindrical path 7, without born

site the creation of radial edges.

Of course, the invention is in no way limited to the modes of execution described and represented; dest as well as the bearing surfaces forming the skids can be obtained by deformation

and / or cutting the wall 26 and presenting shapes, orien-

different distributions or distributions.

Furthermore, the arrangement of Figure 1 can be reversed by making a cage provided with protrusions

exterior 33 centered between the ramps and edges of ex-

inner-shells 29 centered on the inner cylindrical path

laughing 7.

Finally, we can consider the application of the variants described above to a freewheel whose cylindrical path

is carried by the outer ring, and whose ramps are

read or attached to the inner ring.

RE VNDICATIONS

1 / Freewheel coupling device of the type comprising

a cage comprising guide and / or hand cells

of a plurality of wedging elements arranged in-

be a cylindrical path and a path provided with a series of ramps, characterized in that the cage comprises at least one depression and / or protuberance, obtained by deformation, and extending radially with respect to its cylindrical wall to constitute a span landing on at least one of

aforementioned paths.

2 / Device according to claim 1 characterized in that the aforementioned scope is constituted by the bottom of a bowl

made in the cylindrical wall of the cage.

3 / Device according to claim 2 characterized in that the bottom has the shape of a shoe of similar dimensions

of those of a cell.

4 / Device according to one of claims 1 to 3 characterized

in that the spans allow centering on both

aforementioned paths.

/ Device according to one of claims 1 to 3 characterized

in that the centering of the cage on the other path is sufficient

sure by its radial edges.

6 / Device according to one of claims 1 to 5 characterized

in that the bearing rests on the cylindrical path

or on the ramp path.

7 / Device according to one of claims 1 to 6 characterized

in that the cage-includes regularly repaired litters-

ties on its periphery, and each arranged between two al-

consecutive voles.

8 / Device according to one of claims 1 to 4 characterized

in that the cage includes several pairs of orientable spans

each in two opposite directions, and regularly

distributed around its periphery to ensure centering on each

none of the paths respectively.

9 / Device according to one of claims 1 to 8 characterized

in that the centering on the path provided with the amps is obtained

5.

'u at the level of the zones: sparing them.

/ Device according to one of claims i to 9 charac-

s $ in that the cage is obtained without removal of shavings.