DE7025697U - SELF-LOCKING NON-RELEASE NUT. - Google Patents

Description

For -ii '"·' A: .- η ·; In .. ·: '.-.-- rdor the priorities of the corresponding; ; r-i ::: '.. Ar.:rr-;.i-j:inpn' .'r. 6922075 of June 30, 1969 and :. ': .. "" "'. ■■." v-; r, ■ '. Claimed March 1970 (FRANCE).

: · · '· ■ ·: ■■ ^r ' j: '; : ^r 7.: -indicates improvements in self-

i r-'uttorn preferably on self-assured '': ^; .rr. cum Determining the inner race of a '-ir.os Kuifllager, a bearing with cylindrical: en rollers, a roller bearing or the like.

r-r. sir.d already known numerous unsolvable nuts whose Si-? herur.g through accessories or built into the nut itself Smock is effected.

Sc it is known to be clamped between a mother and a man. Part, for example the inner race eir.e ~ Bearing to insert a safety washer, di3 rr.it a:

702569719.11.70

ί is stranding the inner tongue, which is slidable within a groove I, dio in the longitudinal direction in one with a thread
provided eir.gefräst shaft on which the nut is screwed, 'Ji. <' Z se may also icherunqsringscheibe
have a certain '»" ¹ number before. Au !? or.'. pitz-.m ^ d er -7.ur.gpr., the '-. • ine pa ^ .er.'je Fer t le-jung the mother against co: to be harnessed "part by simple :; '' lay egg .- 'o the sharpener, in
one on the front side overlapping the frontal width
the mutier voi ge ~ '- h ~ r, A allow recess.

L. ^l io5o better known. However, some embodiments have

gel on. The need to manufacture a longitudinal groove in the ^{shaft marked with:} e '- inde can namely lead to manufacturing complications, while the insertion of a locking washer, for example made of soft steel, between a!

ι Kutt ^e r court? · he front side and the inner race!

tir. °: bearing can produce a lack of angularity when tightening the nut. In addition, the clamping moment can be de
Determine mother only in a certain approximation, so that the! Inc- Lei lungbrir.gcn one opposite a recess of the mother!

more to lay down. Tip is possible. After all, at UmIau-! fen the threaded shaft at high speed, as is the case with turbine air jet engines, in which the speed can reach 45,000 rpm, the centrifugal and
tancential forces strive to lift the folded tongue,

702569719.11.70

which can undo the locking of the nut and consequently make it easier to loosen it. In addition, due to the Schwinqur.gen, ■ which rotate with the aforementioned very high speeds-

the screw connections are exposed to tearing off the tongues that are fragile in spite of everything. ι

There are also nuts with notches known, in the j

Front side a ^{synthetic f} offring, for example made of nylon, \ is used. Finally, one generally uses that j the fittings are exposed to high temperatures and i

as a result, the use of ^: plastic ring inserted into the nut, securing means that are ^{made from one piece with the:} nut s - '.nd. :

Used in this context; in so far nuts that one elliptically constricted upper. Have part or only a conical part, and which are provided with slots, being the elliptical or conical part as it progresses Screw the cutter onto the threaded shaft or screw enables elastic self-locking «-.

These well-known nuts have eir.e öesairthehe which considerably is larger than that of the standardized. Cutters ir.it incisions. Due to their considerable height, these nuts lead to a Greater length of the threaded. Wave and consequently to corresponding disadvantages, such as a ^ e-

702569719.11.70

more important than the conditions of aircraft construction entaeaen stand.

; L fcfil T

• fei "cucLuiiu j ic \ ji. Ui.c aujyauf iju

to fix, according to the innovation an insoluble nut of a particularly simple Formcebunc is created, the total height of which is essentially the same as that of the standardized nuts, without OaR accessories or the like must be used for a corresponding locking effect or in the shaft seen with thread a longitudinal groove is to be milled.

2u this ·; - Purpose is a self-assured, insoluble mother

Ui P

wrestling determined ii-t ur.c those, the end face opposite the pressing face at least two diametrically opposed and separated from one another by ^ adialc incisions! has, characterized in that it eir at least i ~ the height of the neck. kor. Is ches thread, while au r the outer ridge ut_r ^v utter at the root of the nok- ■ Ice. ¹ , ei .-. E deep groove is formed, up the Xccken in radial. Direction elastically deformable to r.?cher ..

According to one, another. The feature of the innovation is the thread ^; originally designed conically over the entire height of the cutter. ;

702569719.11.70

A nut made in accordance with the innovation with a conical interior: ·. <.vinds, whose part with the The smallest diameter can be deformed radially, is particularly easy and effective to use, especially --- »i Ver Application on a shaft rotating at high speed, as is the case with turbine air jet engines. Also is It is possible to achieve a desired locking torque according to the conicity of the thread of the nut previously given.

According to a further feature of the innovation, the thread origin is cylindrical over the entire height of the nut formed, whereupon the cams are plastically deformed in the radial direction.

By tilting the cams towards the inside of the nut by a predetermined angle, a nut is obtained, whose thread is partially conical. The area of the nut with the conical thread forms a sex safety zone the external thread, this securing being carried out from the root of the cams to their outer upper part. It is special advantageous to only one or a few diametrically opposite pairs of cams towards the axis of the nut tilt to allow for a smoother and more conforming fuse 7U.

702569719.11.70

* * »" Γ'-iri U ti mi η * (· ·· «·· ■ ·» ■>

ft ti ti i. it ι ι:

It should also be noted that according to the innovation, the thread on the Inner part of the nut is provided, but that it can also be provided on the nut's Außenurp.fang k ^, rin.

According to a further feature of the Neue_u io v: = :: · cams each essentially parallel to one another? .- ■■? Ken up.

Another feature of the innovation is that the aforementioned Groove has a substantially U-shaped cross-section in order to allow the cams to be bent by means of a wedge To enable forming tool, wherein the groove is preferably arranged approximately halfway up the nut.

The height of the actual nut with its securing means is thus advantageously reduced, while the thread surface the cam is much larger than half of the total thread area.

The innovation also relates to a method for producing the nut described above, which is characterized is that a cylindrical ring is internally threaded and a deep groove is made on the outer circumference of the ring » is, on its Anpreßstirnseitc opposite front side, incisions are milled, each in two cross-j

passages are formed, each of which has the parallel f

i lelen flanks of two diametrically opposite each other

702569719.11.70

delimit arranged cams, and at least one pair of a * -. j. diametrically opposed cams with the help of a Vi, stuff is tipped.

In this way, the milling of the incisions, which ensures the parallelism of the flanks of the cams, enables a perfect free balancing of the moving masses, especially at high speeds, with considerable at the same time Reducing the weight of the nut and manufacturing costs,

Other features and advantages of the innovation emerge from the following Description based on the drawings illustrating some exemplary embodiments. Show it:

Fig. 1 is a perspective view of a nut according to the innovation with twelve cams,

Fig. 2 is a section along the line II-II in Fig. 1,

3 is a perspective view of another embodiment of a nut according to FIG Innovation with only four cams,

4 is a perspective view of a nut,

whose internal thread is conical over the entire height of the nut, and

Fig. 5 is a partially sectioned side view showing the nut of FIG. 4 and a

702569719.11.70

• · * »» 0 «III · I · _B » · · I »· lltl II«

VJeIle illustrated with a cylindrical thread for receiving the nut.

According to the embodiment of Figures 1 and 2, there is the self-locking (autc-freine) non-detachable nut essentially consisting of an internally threaded ring 2, which with its compression) end face a part to be clamped, for example the inner h Race of a (not shown) bearing to set. The cylindrical ring 2 has on its the press face opposite end face milled incisions, recesses or the like. 4 on. Each incision 4 is from the other by cams, teeth or the like. 5 Getrcrr * -, The height of the thread 6 of each cam 5 is essentially the same as that with The height 7 is provided with a thread and corresponds to the full inner part of the ring 2.

According to the exemplary embodiment shown in FIG. 1, twelve cams 5 forehands are on the ring 2, but they could also provided that they are even and are arranged diametrically opposite one another, one more or make less than twelve total numbers. In the outer circumference of the ring 2, precisely at the level of the root * l of the cams or teeth 5, a deep annular groove 8 is formed according to the illustrated embodiment, which has a cross section in Has the shape of a slightly open U. So it turns out

702569719.11.70

that each cam 5 has a weakening point at its root 9, which makes it possible to move it towards the interior of the ring 2 to incline or tilt.

The cams 5 each point essentially parallel to one another lele flanks 10, while the incisions 4 between two adjacent cams are substantially trapezoidal.

As can be clearly seen from FIG. 3 and according to another embodiment the ring 2 has a smaller diameter than the ring described above, having only four each has cams 5 separated from one another by incisions 4.

The incisions 4 can be milled by, for example, two crossed ones, in each case to the opposite one another Flanks 10 of two adjacent cams 5 make parallel passages, so that the second milling pass is made in each incision gang advantageously eliminates all burrs left behind during the first pass. Of course you can also a series of successive milling passes are carried out in such a way that each in Fig. 1 by a dashed Corridor 11, the passage shown schematically, passes through two mutually opposite incisions 4,

702569719.11.70

- 10 on a chord of the ring 2.

After the shaping of the ring 2 has been completed, a tool forming a wedge can be used which by circumferential action, the cam tilts at the same time in the direction of the interior of the nut 1, in a predetermined manner Angle with respect to d ^ m of the press face 3 of the ring 2 corresponding full part. Of course, any suitable? Tool to be used if only one or certain pairs of diametrically opposed cams are to be tilted.

The self-locking and tightening of a nut after the innovation against a part to be clamped, for example one! Bearing inner race, do the following: j

After placing the nut on a screw or threaded shaft, the nut anixKXHsxSshKasda] with its threaded portion 7 can rotate freely on the shaft until the first thread of the shaft forms the base of the threaded inner surface 6 of the cams 5 reached, which have previously been inclined towards the axis of the nut 1 or diagonally £ provides. It should be noted that the nut can be tightened using a suitable tool,

- 11 -

702569719.11.70

which can be inserted into the incisions 4 between the cams 5. ... more arises at the base of the cams 5 up to her upper. Outer edge a progressive braking, d. H. Fuse. The securing takes place according to the screwing progressive by making a radial and outward deformation of the squat? by supporting her threaded inner surface 6 causes against the shaft while this deformation, which allows the cams to contract against the shaft, causes a deformation the actual mother body, d. H. of the press face 3 of the ring 2 corresponding full part, brings about within the permissible tolerance limit between the External and internal threads. It stands to reason that the threaded in the direction of the axis Wave occurring deformation of the mother body which seeks to intensify the security. When the P * tear face 3 brought into the correct position, which is achieved by a counteraction opposite to that described above counter effect causes an increase in the safety of the cams

gently, d. H. forcibly bending the cams in Rich% \ ± device leads to the threaded shaft. In this way, the successive j the deformations and counteraction of the nut body due to the cams 5 during the tightening and the cams due to the nut body during the fixing, a

- 12 -

702569719.11.70

Increased securing of the nut against the part to be clamped.

It should be noted that the materials that come into function in the formation of a nut according to the innovation are any steels [

or alloys that can withstand tempering doors that min »

0
can reach at least 650 C, are resistant. The cams arranged diametrically opposite one another can be of any desired type, and the annular groove formed at the level of the root of the cams or teeth can have a different cross-section than one. U-, V-shaped or the like. Cross-section without leaving the area of innovation.

In Fig. 4 and 5, a nut 21 is shown, which over their entire height has a conical thread, while the previous nut has the Kenical thread: only on the cams was present.

According to the embodiment shown in FIGS the nut 21 is provided with a conical internal thread 22 and it can cooperate with a screw or shaft 23 which is provided with a more cylindrically external thread.

The nut 21 has a plurality of diametrically opposed to each other oppositely arranged and through milled incisions 25 separated from each other. Cam 24 on. In the outer circumference of the

- 13-

702569719.11.70

Nut, preferably at the level of the root of the cam, a deep annular groove 26 is made. In other words, each cam has on its basid a notch made on the outer circumference of the nut. It is clear that this notch or groove naturally favors the deformation of the upper part of the pattern when screwing on. It should be noted, however, that the groove 26 is not indispensable. As can be seen from FIG. 5, the conicity of the internal thread 22 of the nut 21 according to the angle cK> hercestelit worder.

It goes without saying that this conicity, depending on the species the assembly in question (screwing) and depending on the desired moment of secrecy can be. It is useful, however, that this conicity is produced so that that of the pressing face of the mother corresponding full part can be screwed freely on the screw 23, and that the last threads of the Cam 24 a fuse start number. begins to take effect. It is precisely at this point in time that a progressive backup takes place the mother, up to the definition of the part to be clamped with simultaneous creation of a VerfDr- j

tion of the cam 24 in the radial direction and outward. It j

It is clear that this radial deformation of the nut, which interacts with the actual conicity of the thread of the nut Cams ensure proper clamping and definition of the

702569719.11.70

exciting part. 'E _L discussed above, the screw is ^J thus produced in Flugzeuybav particularly effective, and in particular if the bearing races. ¹ Ur ijt: brought to a very high speed!,: · .-: Gev.:nciv. To be clamped on a shaft.

According to the embodiment shown in FIGS. 4 and 5, the press-on end of the nut 21 is opposite Front cam 24 on. Although in certain cases the presence of the cams is particularly beneficial, it is It is essential to point out that the nut could just as well have axial slots or the like instead of the j cams with also and possibly at least one groove or notch formed in the outer circumference of the butter.

The nut described above can be used without the To leave the area of innovation, just as well have the form of a winning ring. So the ring would have a conical A. Have external threads, the axial part of which started with the Diameter with cams or slots and possibly with at least one in the inner circumference of the ring, for example on the base j

de '"cam, produced annular groove would be provided. Such i

ι rting has not been shown in the drawing because j

its structure can be easily deduced from the above. j

- 15 - '

702569719.11.70

The innovation is therefore in no way limited to the exemplary embodiments described. The number

: -: i-length and the shape of the cams or the slots can be, .coin. The innovation thus contains all the technical equivalents of the described means forming means κ as well as their combinations, provided that they are implemented in the sense of the innovation.

702569719.11.70

Claims (1)

A_n_s_E_r_ü_c_h_e Self-locking non-detachable nut, especially for fixing Lajer running rings, the opposite of which is the contact face Front face at least two diametrically opposed and by milled radial incisions having separate cams, characterized in that the mother a conical thread at least at the level of the cams (5, 24) (6.22), while on the external or the Inside of the nut at the root of the cams a deep groove (B, 26) is formed so that the cams are radially deformable and elastically deformable. 2. Nut according to claim 1, characterized in that the The thread is initially conical over the entire height of the nut. ?. Nut according to claim 1, characterized in that daP. that Gev.'inde initially designed to be cylindrical over the entire height of the nut, after which the cams (?) In radial Direction are plastically deformed. - 17 - 702569719.11.70 Nut according to claims 2 and 3, characterized in that the thread extends over the inner circumference of the nut] stretches, wooei then the groove on the outer circumference of the nut at ι the base of the cam is made. 5. Nut according to claim 2 and 3, characterized in that the thread extends over the outer circumference of the cutter, in which case the groove on the inner circumference of the nut is hero-placed at the base of the cam. 6. Nut according to claims 1 to:>, characterized in that that the cams (5,24; each ir '-' essential to each other | Widen parallel flanks (10). Cutter according to claims 1 to 6, characterized in that that the groove (8) a bending of the cam (5) by means of j of a tool that creates a wedge in the! j has a substantial U-shaped cross-section. j 8. Nut according to claims 1 to 7, characterized in that the incisions (Ί, 25) used for turning the nut-ί cash sinJ. j 9. Cutter according to claims 1 to S, characterized in that ra ⁿ . dir-:; ut (8.26) about halfway up the mother- 702569719.11.70