FR2529628A1

FR2529628A1 - Nut locking device.

Info

Publication number: FR2529628A1
Application number: FR8211878A
Authority: FR
Original assignee: Individual
Current assignee: Individual
Priority date: 1982-06-30
Filing date: 1982-06-30
Publication date: 1984-01-06

Abstract

The invention relates to a device for blocking nuts most especially but not exclusively for the wheels of vehicles. This device is characterised: - on the one hand, in that it comprises two main elements 5, 7 of which one plate 5 is immobilised rotatably with respect to the nut 4 and a lug 7 which is immobilised rotatably about the axis 9 of the stud 3 and, - on the other hand, in that these two elements are joined together by at least one clamping means 11 whose body is mounted in one of the elements and passes through a slot 13 which is cut out in the other element and which has a bowed shape according to a radius whose centre is that of the nut 4. Application to the bolt-manufacturing industry.

Description

L'invention se rapporte à un dispositif de blocage d'écrous plus particulièrement mais non exclusivement pour roues de véhicules. The invention relates to a nut locking device more particularly but not exclusively for vehicle wheels.

I1 arrive souvent que les écrous de roues se dessèrent, quelquefois même, se dévissent complètement et provoquent, par la projection de la roue libérée et/ou le déséquilibre du véhicule, des accidents d'autant plus graves que ce desserage, généralement dû à des vibrations est, de ce fait, plus fréquent sur les véhicules industriels qui sont très lourds. I1 often happens that the wheel nuts loosen, sometimes even, unscrew completely and cause, by the projection of the released wheel and / or the imbalance of the vehicle, accidents all the more serious as this loosening, generally due to vibration is therefore more frequent on industrial vehicles which are very heavy.

Dans des ensembles mécaniques ne devant être démontés qu'exceptionnellement, il est connu (brevet français A 2.190.200) de bloquer deux organes de serrages voisins à l'aide d'un feuillard traversé par les corps des deux organes de serrage et dont, après serrage, les extrémités sont relevées contre ltun des six pans que présente la tête des organes de serrage pour ensuite en interdir la rotation. In mechanical assemblies which need only be dismantled in exceptional cases, it is known (French patent A 2,190,200) to block two neighboring tightening members using a strip crossed by the bodies of the two tightening members and of which, after tightening, the ends are raised against one of the hexagon that the head of the clamping members has and then prohibit rotation.

Bien qu'efficace, ce dispositif ne peut évidemment convenir pour des pièces devant être démontées fréquemment, telles des roues de véhicule, du fait que les pliages et dépliages successifs du feuillard casseraient rapidement celui-ci. Although effective, this device is obviously not suitable for parts that have to be dismantled frequently, such as vehicle wheels, because the successive folding and unfolding of the strip would quickly break it.

Un résultat que l'invention vise à obtenir est un dispositif de blocage qui est à la fois efficace et applicable à des pièces fréquemment démontées. One result which the invention aims to obtain is a locking device which is both effective and applicable to parts that are frequently dismantled.

A cet effet, l'invention a pour objet un dispositif de blocage du type cité plus haut, notamment caractérisé
- d'une part, en ce qu'il comprend deux éléments principaux dont une plaque immobilisée en rotation par rapport à l'écrou et une patte immobile en rotation autour de l'axe du goujon et,
- d'autre part, en ce que ces deux éléments sont associés entre eux par au moins un moyen de serrage dont le corps se monte dans l'un des éléments et traverse une lumière qui est découpée dans l'autre élément et qui présente une forme arquée selon un rayon ayant pour centre l'axe de 1 'écrou. To this end, the subject of the invention is a blocking device of the type mentioned above, in particular characterized
on the one hand, in that it comprises two main elements including a plate immobilized in rotation relative to the nut and a stationary tab in rotation around the axis of the stud and,
- on the other hand, in that these two elements are associated with each other by at least one clamping means, the body of which is mounted in one of the elements and passes through a lumen which is cut from the other element and which has a arcuate shape according to a radius having for center the axis of 1 nut.

L'invention sera bien comprise à l'aide de la descrip tion ci-après faite, à titre d'exemple non limitatif, en regard du dessin ci-annexé qui représente, schématiquement
- figure 1 : le dispositif vu de face,
- figure 2 : une coupe selon II-II de la figure 1,
- figure 3 : une variante de réalisation du dispositif,
- figure 4 : une coupe selon IV-IV de la figure 3,
- figure 5 : une coupe selon V-V de la figure 3.The invention will be better understood with the aid of the following description made, by way of nonlimiting example, with reference to the appended drawing which represents, schematically
- Figure 1: the device seen from the front,
FIG. 2: a section along II-II of FIG. 1,
FIG. 3: an alternative embodiment of the device,
FIG. 4: a section on IV-IV of FIG. 3,
- Figure 5: a section along VV of Figure 3.

En se reportant au dessin, on voit que l'ensemble 1, tel une roue, présente des perçages 2 traversés par des goujons 3 portés par une pièce (non représentée) contre laquelle l'ensemble 1 est appliqué par des écrous 4 se vissant sur les goujons 3. Referring to the drawing, it can be seen that the assembly 1, like a wheel, has holes 2 crossed by studs 3 carried by a part (not shown) against which the assembly 1 is applied by nuts 4 screwing onto the studs 3.

Selon une caractéristique essentielle de l'invention - d'une part, , le dispositif de blocage des écrous comprend deux éléments principaux 5 et 7 ou 6 et 8 dont une plaque 5 ou 6 immobilisée en rotation par rapport à l'écrou 4 et une patte 7 ou 8 immobile en rotation autour de l'axe 9 ou 10 du goujon 3 et,
- d'autre part, ces deux éléments sont associés entre eux par au moins un moyen de serrage 11 ou 12 dont le corps se monte dans l'un des éléments et traverse une lumière 13 ou 14 qui est découpée dans l'autre élément et qui présente une forMe arquée selon un rayon ayant pour centre l'axe de l'écrou 4.According to an essential characteristic of the invention - on the one hand, the nut locking device comprises two main elements 5 and 7 or 6 and 8 including a plate 5 or 6 immobilized in rotation relative to the nut 4 and a leg 7 or 8 immobile in rotation about the axis 9 or 10 of the stud 3 and,
- on the other hand, these two elements are associated with each other by at least one clamping means 11 or 12, the body of which is mounted in one of the elements and passes through a lumen 13 or 14 which is cut from the other element and which has an arcuate shape according to a radius having as its center the axis of the nut 4.

Dans une première forme de réalisation (figures 1 et 2), la plaque 5 immobilisée en rotation par rapport à l'écrou consiste en une collerette solidaire de l'écrou 4, laquelle collerette peut être venue de matriçage ou être constituée par une rondelle solidarisée à l'écrou par un cordon ou des points de soudure 15. In a first embodiment (Figures 1 and 2), the plate 5 immobilized in rotation relative to the nut consists of a flange secured to the nut 4, which flange may have come from the die-forging or be constituted by a washer secured to the nut by a bead or welding spots 15.

La patte 7, immobile en rotation autour de l'axe 9 du goujon , se présente sous la forme d'une rondelle, dans le perçage central 16 de laquelle l'écrou peut tourner librement et à laquelle rondelle est associé un moyen 17 d'immo hiiisation en rotation tel une bride reliée à un point fixe formé par exemple par un goujon voisin sur lequel la bride serait enfilée directement ou par l'intermédiaire d'une patte 7 d'un autre dispositif de blocage afin que ces deux dispositifs se bloquent réciproquement. The tab 7, which is stationary in rotation about the axis 9 of the stud, is in the form of a washer, in the central bore 16 of which the nut can rotate freely and to which washer is associated means 17 of immo hiiisation in rotation such as a flange connected to a fixed point formed for example by a neighboring stud on which the flange would be threaded directly or by means of a tab 7 of another locking device so that these two devices are blocked reciprocally.

Dans l'élément opposé à celui présentant la lumière arquée, sont prévus, en vue du montage du moyen de serrage 11, plusieurs logements 18 répartis sur une circonférence ayant pour centre le centre de la rondelle et pour rayon le même rayon que la lumière arquée qui, sur l'autre élément, s'étend sur un angle au centre au moins égal à celui séparant deux logements 18 afin que ladite gorge 13 dégage toujours au moins un de ces logements 18. In the element opposite to that having the arcuate light, there are provided, for mounting the clamping means 11, several housings 18 distributed over a circumference having for center the center of the washer and for radius the same radius as the arcuate light which, on the other element, extends over an angle at the center at least equal to that separating two housings 18 so that said groove 13 always releases at least one of these housings 18.

Par exemple, dans la collerette 5 de l'écrou, seront percés et taraudés quatre trous 18 régulièrement répartis et, dans la rondelle -de la patte de blocage 7, la lumière s'étendra sur au moins 900 et, de préférence, sur 1800. For example, in the flange 5 of the nut, will be drilled and tapped four holes 18 regularly distributed and, in the washer -from the locking tab 7, the light will extend over at least 900 and, preferably, over 1800 .

Quant au moyen de serrage 11, il consistera, par exemple, en une vis qui, après avoir traversé la lumière 13, se- vissera dans l'un des trous taraudés 18 jusqu'à ce que sa tête serre énergiquement la rondelle sur la collerette et immobilise celle-ci. As for the clamping means 11, it will consist, for example, of a screw which, after having passed through the lumen 13, will be screwed into one of the tapped holes 18 until its head vigorously tightens the washer on the flange and immobilizes it.

Dans une variante de réalisation (figures 3, 4 et 5), c'est l'élément 6 qui présente la lumière arquée 14 qui est immobilisé en rotation par rapport à l'écrou 4. Il consiste, à cet effet, en une rondelle dont le perçage central 19 a une forme polygonale complémentaire à celle de l'écrou 4. In an alternative embodiment (Figures 3, 4 and 5), it is the element 6 which has the arcuate lumen 14 which is immobilized in rotation relative to the nut 4. It consists, for this purpose, in a washer whose central bore 19 has a polygonal shape complementary to that of the nut 4.

L'élément 8 immobilisé en rotation autour de l'axe 10 du goujon 3 est une patte ainsi rendue immobile par sa fixation à un point fixe tel un support 20 relié à un point fixe et/ou par utilisation de son prolongement 8a comme patte d'un autre dispositif de blocage afin que ces deux dispositifs se bloquent réciproquement. The element 8 immobilized in rotation about the axis 10 of the stud 3 is a lug thus made immobile by its fixing to a fixed point such as a support 20 connected to a fixed point and / or by using its extension 8a as a d 'another blocking device so that these two devices block each other.

L'organe 12 de serrage traverse la lumière arquée, qui s'étend sur un angle au centre au moins égal à l'angle au centre de chacune des faces de l'écrou, avant de se monter dans la patte 9 qui comprend, à cet effet, un seul logement 21, tel un trou taraudé. The clamping member 12 passes through the arcuate lumen, which extends over an angle at the center at least equal to the angle at the center of each of the faces of the nut, before being mounted in the tab 9 which comprises, at for this purpose, a single housing 21, such as a tapped hole.

Claims

1. Locking device for a nut (4) on its threaded rod (3) such as that of a stud, CHARACTERIZED

- firstly, in that it comprises two main elements (5 and 7 or 6 and 8), including a plate (5 or 6) immobilized in rotation about the axis (9 or 10) of the threaded rod (3) and,

- on the other hand, in that these two elements are associated with each other by at least one clamping means (it or 12) whose body is mounted in one of the elements and passes through a lumen (13 or 14) which is cut from the other element and which has an arcuate shape along a radius having the axis of the nut (4) as its center.

2. Locking device according to claim 1 characterized

- in that the plate (5), immobilized in rotation relative to the nut, consists of a flange secured to the nut (4) while the tab (7), immobilized in rotation around the axis (9 ) of the threaded rod (3), is in the form of a washer in the central bore (16) of which the nut can rotate freely and to which washer is associated a means (17) of immobilization in rotation such a flange connected to a fixed point, and

- in that, in one of these elements, there are provided, for mounting the clamping means (11), several housings (18) distributed over a circumference having for center the center of the washer and for radius the same radius as the arcuate light presented by the other element and which extends over an angle at the center at least equal to that separating two housings (18) so that said groove (13) always releases at least one housing (18).

3. Locking device according to claim 1 characterized

- in that the element (6) which is immobilized in rotation relative to the nut (4), has the arcuate lumen (14) and consists of a washer whose central bore (19) has a polygonal shape complementary to that of the nut (4) while the element (8) immobilized in rotation about the axis (10) of the stud (3) is a lug thus rendered immobile by its attachment to a fixed point, and

- in that the clamping member (12) passes through the arcuate lumen which extends over an angle at the center at least equal to the angle at the center of each of the faces of the nut, before being mounted in the tab (8) which, for this purpose, comprises a housing (21).

4. Device according to claim 2 or 3 characterized in that the fixed point consists of a neighboring threaded rod.

5. Device according to claim 2 or 3 characterized in that the fixed point consists of a device for blocking a neighboring nut.