FR2683874A1

FR2683874A1 - Torsion bar bearing

Info

Publication number: FR2683874A1
Application number: FR9114109A
Authority: FR
Inventors: Chaussepied Jean-Noel
Original assignee: Hutchinson SA
Current assignee: Hutchinson SA
Priority date: 1991-11-15
Filing date: 1991-11-15
Publication date: 1993-05-21
Anticipated expiration: 2011-11-15
Also published as: FR2683874B1

Abstract

The means for locking the bearing onto a torsion bar or the like comprise pins 2 and 3 slipped into imbricated hinge knuckles 4 that the corresponding edges of two half-shells 1a and 1b include. The first mounted may thus act as a hinge allowing relative pivoting of the two half-shells upon mounting. The internal elastic ribs 5 of the half-shells are compressed on the bar upon complete closure, in order to fit the second pin 3. Next, the release of the bearing submits the pins 2 and 3 to flexural loads, which holds them in place by friction.

Description

Palier de barre de torsion.Torsion bar bearing.

La présente invention concerne un palier de barre de torsion, en particulier de barre antidévers pour véhicule automobile, du type comportant une armature relativement rigide, constituée de deux demi-coquilles opposées de forme générale semi-cylindrique et reliées par une charnière de sorte que l'armature puisse être montée puis refermée sur une barre de torsion, un moyen de fermeture permettant alors de la verrouiller sur la barre ; des nervures en matériau élastique, solidaires de la face intérieure de ladite armature et s'étendant sensiblement selon des génératrices desdites demi-coquilles, ces nervures étant propres à pincer la barre lorsque ladite armature y est verrouillée ; et un matelas de matériau élastique plus souple que lesdites nervures, solidaire extérieurement de ladite armature et propre à être bloqué dans un moyen de support du véhicule, ce matelas étant propre à travailler en torsion lors du fonctionnement de la barre. The present invention relates to a torsion bar bearing, in particular an anti-roll bar for a motor vehicle, of the type comprising a relatively rigid frame, consisting of two opposite half-shells of generally semi-cylindrical shape and connected by a hinge so that the the frame can be mounted and then closed on a torsion bar, a closing means allowing it to be locked on the bar; ribs of elastic material, integral with the inner face of said frame and extending substantially along generatrices of said half-shells, these ribs being able to pinch the bar when said frame is locked there; and a mattress of elastic material more flexible than said ribs, externally secured to said frame and suitable for being locked in a vehicle support means, this mattress being suitable for working in torsion during the operation of the bar.

On comprend que les nervures en matériau élastique (élastomere ou analogue) bloqueront efficacement le palier sur la barre, à la fois axialement et en torsion, tout en pouvant suivre les déformations en hélice de cette barre, lors du fonctionnement. C'est cependant le matériau élastique dudit matelas, en principe plus épais que lesdites nervures, qui encaissera l'essentiel des débattements en torsion. En tout cas, on voit que ce type de palier évitera en fonctionnement le frottement, l'usure et les couinements qui affectent fréquemment les autres paliers de la technique antérieure. It is understood that the ribs of elastic material (elastomer or the like) will effectively block the bearing on the bar, both axially and in torsion, while being able to follow the helical deformations of this bar, during operation. However, it is the elastic material of said mattress, in principle thicker than said ribs, which will collect most of the torsional travel. In any case, it is seen that this type of bearing in operation will avoid the friction, wear and squeaks which frequently affect the other bearings of the prior art.

Cependant l'invention ne porte pas sur ce concept général du palier, mais plus particulierement sur ses moyens de fermeture, c'est-à-dire sur les moyens qui permettront de le verrouiller sur la barre de torsion, sans toutefois interdire un déverrouillage ultérieur, dans le cas ou le palier aurait besoin d'être remplacé. However, the invention does not relate to this general concept of the bearing, but more particularly to its closing means, that is to say to the means which will make it possible to lock it on the torsion bar, without however prohibiting subsequent unlocking. , in case the bearing needs to be replaced.

Le but de la présente invention est d'obtenir des moyens de fermeture faciles à mettre en oeuvre et peu coûteux, tout en assurant un verrouillage efficace et sûr du palier sur la barre. The object of the present invention is to obtain closing means which are easy to implement and inexpensive, while ensuring effective and secure locking of the bearing on the bar.

A cet effet, un palier du type général défini au début sera essentiellement caractérisé en ce que ladite charnière est constituée par un premier axe engagé dans des trous alignés que comportent des gonds imbriqués, formés sur les deux bords coopérants des deux demi-coquilles, lesquelles sont moulées chacune d'une pièce, et en ce que ledit moyen de fermeture est constitué par un second axe engagé dans les trous alignés que comportent les gonds imbriqués formés sur les deux autres bords coopérants desdites demicoquilles. To this end, a bearing of the general type defined at the start will be essentially characterized in that said hinge is constituted by a first axis engaged in aligned holes which have nested hinges, formed on the two cooperating edges of the two half-shells, which are each molded in one piece, and in that said closure means is constituted by a second axis engaged in the aligned holes that comprise the nested hinges formed on the other two cooperating edges of said half shells.

Selon une disposition complémentaire importante de la présente invention, propre à conférer à la fermeture la sécurité voulue, on prévoit que l'épaisseur desdites nervures est telle, par rapport au diamètre de ladite barre de torsion, que l'alignement des trous des demi-coquilles ne peut être obtenu que moyennant un écrasement desdites nervures, en pressant de l'extérieur les deux demi-coquilles l'une contre l'autre, cet alignement permettant l'introduction dudit second axe une fois le premier axe déjà mis en place avant montage sur la barre, par suite de quoi un relâchement de la pression exercée de l'extérieur sur lesdites demi-coquilles permettra auxdits axes d'être soumis, de la part desdits gonds imbriqués, à des efforts de flexion de sens alternés, et d'etre ainsi maintenus en place par frottement. According to an important complementary arrangement of the present invention, capable of giving the closure the desired security, it is provided that the thickness of said ribs is such, relative to the diameter of said torsion bar, that the alignment of the holes of the half shells can only be obtained by crushing said ribs, by pressing the two half-shells from the outside against one another, this alignment allowing the introduction of said second axis once the first axis already in place before mounting on the bar, as a result of which a relaxation of the pressure exerted from the outside on said half-shells will allow said axes to be subjected, on the part of said nested hinges, to bending forces of alternating directions, and d 'thus be held in place by friction.

Avantageusement aussi, ladite armature présente au moins au niveau de son moyen de fermeture et sur chaque demi-coquille, des surfaces d'appui pour une pince ou analogue, accessibles au moins localement grâce à des encoches pratiquées dans ledit matelas. Advantageously also, said frame has at least at its closure means and on each half-shell, bearing surfaces for a clamp or the like, accessible at least locally by means of notches made in said mattress.

L'invention pourra encore se caractériser en ce que les deux demi-coquilles sont identiques et peuvent s'ajuster l'une sur l'autre par complémentarité de formes lorsqu'elles sont opposées l'une à l'autre par leurs bords respectifs, les gonds de l'une s'intercalant exactement entre les gonds de l'autre. Cela rend la fabrication par moulage peu coûteuse, puisqu'il suffit d'un seul moule pour la fabrication des demi-coquilles. The invention may also be characterized in that the two half-shells are identical and can be adjusted to one another by complementarity of shapes when they are opposite to each other by their respective edges, the hinges of one being inserted exactly between the hinges of the other. This makes manufacturing by molding inexpensive, since a single mold is sufficient for the manufacture of the half-shells.

Un mode d'exécution de l'invention va maintenant être décrit à titre d'exemple nullement limitatif, avec référence aux figures du dessin annexé dans lequel
- la figure 1 représente les deux demi-coquilles rigides de 1 ' armature du palier, sans leur revetement de matériau élastique
- la figure 2 est une vue en coupe transversale de ce palier, avec le matériau élastique de revêtement ; et
- la figure 3 est une vue en plan du palier complet de la figure 2.An embodiment of the invention will now be described by way of non-limiting example, with reference to the figures of the accompanying drawing in which
- Figure 1 shows the two rigid half-shells of one bearing frame, without their coating of elastic material
- Figure 2 is a cross-sectional view of this bearing, with the elastic coating material; and
- Figure 3 is a plan view of the full bearing of Figure 2.

Sur les figures, on a référencé en la et lb les deux demi-coquilles rigides, en matiere synthétique moulée, leur forme générale étant semi-cylindrique. Ces deux demicoquilles sont identiques et opposées l'une à l'autre en tête-beche, de sorte à pouvoir constituer ensemble une armature 1 rigide et pratiquement cylindrique, par complémentarité de formes ; ainsi, les gonds 4 des bords de chaque armature peuvent-ils s'emboîter exactement dans les créneaux qui séparent deux gonds 4 voisins sur les bords correspondants de l'autre armature. In the figures, the two rigid half-shells, made of molded synthetic material, have been referenced in la and lb, their general shape being semi-cylindrical. These two half-shells are identical and opposite one another at the top, so as to be able to constitute together a rigid and practically cylindrical frame 1, by complementarity of shapes; thus, the hinges 4 of the edges of each frame can fit exactly into the slots which separate two neighboring hinges 4 on the corresponding edges of the other frame.

La face intérieure de chaque demi-coquille d'armature est revêtue d'une couche de matériau élastique adhérisée à l'armature et présentant longitudinalement des nervures 5 dont le rôle a été expliqué plus haut ; de même pour le matelas plus épais 6 de matière élastique qui revêt extérieurement l'armature 1. The inner face of each armature half-shell is coated with a layer of elastic material adhered to the armature and having ribs 5 longitudinally, the role of which has been explained above; similarly for the thicker mattress 6 of elastic material which externally covers the frame 1.

Ceci étant, on comprend qu'après avoir mis en correspondance, d'un côté, les gonds 4 d'une demi-coquille avec les gonds 4 de l'autre demi-coquille, et avoir enfilé un premier axe 2 dans les trous alignés 11 qui traversent ces gonds, on a constitué une charniere, permettant d'ouvrir et de monter le palier sur la barre antidévers. That said, we understand that after having matched, on one side, the hinges 4 of a half-shell with the hinges 4 of the other half-shell, and having threaded a first axis 2 in the aligned holes 11 which pass through these hinges, a hinge has been formed, making it possible to open and mount the bearing on the anti-roll bar.

Du fait de l'épaisseur des nervures 5, telle que l'espace qu'elles ménagent entre elles est d'un diamètre inférieur à celui de la barre, le palier ne peut être complètement refermé sur cette dernière qu'en pressant les deux moitiés du palier l'une contre l'autre, jusqu'à alignement des trous 11 des gonds 4 sur l'autre côté des demi-coquilles. On peut alors enfiler dans ces trous I un second axe 3. Après relâchement des deux moitiés du palier, les nervures 5, comprimées sur la barre antidévers, solliciteront ces deux moitiés l'une 9 l'opposé de l'autre, ce qui soumettra les axes 2 et 3 à des efforts de flexion alternés qui les empêcheront de coulisser dans les gonds 4 et les maintiendront donc en place. Due to the thickness of the ribs 5, such that the space which they provide between them is of a diameter less than that of the bar, the bearing can only be completely closed on the latter by pressing the two halves of the bearing one against the other, until the holes 11 of the hinges 4 are aligned with the other side of the half-shells. We can then thread into these holes I a second axis 3. After loosening of the two halves of the bearing, the ribs 5, compressed on the anti-roll bar, will urge these two halves one opposite the other, which will subject axes 2 and 3 to alternate bending forces which will prevent them from sliding in the hinges 4 and will therefore keep them in place.

Pour le serrage du palier sur la barre, on peut utiliser une pince ou analogue, à doigts décalés. Les extrémités de ces doigts pourront s'appuyer sur des surfaces d'appui 9 que comportent les bords des coquilles la et lb, en passant par des encoches 10 que comporte le matelas 6. For clamping the bearing on the bar, it is possible to use pliers or the like, with offset fingers. The ends of these fingers may be supported on bearing surfaces 9 which comprise the edges of the shells 1a and 1b, passing through notches 10 which comprise the mattress 6.

Les demi-coquilles la et lb étant identiques, des surfaces d'appui 9 sont également visibles du côté de l'axe 2, mais elles peuvent rester inutilisées, à moins que le premier axe 2 ne soit mis en place après le second axe 3. The half-shells la and lb being identical, the bearing surfaces 9 are also visible from the side of the axis 2, but they can remain unused, unless the first axis 2 is put in place after the second axis 3 .

Claims

1. Torsion bar bearing, in particular of an anti-roll bar for a motor vehicle, of the type comprising a relatively rigid frame, consisting of two opposite half-shells (la, lb) of generally semi-cylindrical shape and connected by a hinge (2) of so that the armature can be mounted and then closed on a torsion bar, a closing means (3, 4) then allowing it to be locked on the bar; ribs (5) of elastic material, integral with the inner face of said frame (1) and extending substantially along generatrices of said half-shells (la, lb), these ribs (5) being able to pinch the bar when said frame (1) is locked there; and a mattress (6) of elastic material more flexible than said ribs (5), externally secured to said frame (1) and suitable for being locked in a vehicle support means, this mattress (6) being suitable for working in torsion during the operation of the bar, characterized in that said hinge (2) is constituted by a first axis (2) engaged in aligned holes (11) that have nested hinges (4) formed on the two cooperating edges of the two half-shells (la, lb), which are each molded in one piece, and in that said closure means (3, 4) is constituted by a second axis (3) engaged in the aligned holes (11) which comprise the overlapping hinges (4) formed on the other two cooperating edges of said half-shells.

2. Bearing according to claim 1, characterized in that the thickness of said ribs (5) is such, relative to the diameter of said torsion bar, that the alignment of the holes (11) of the half-shells (la, lb ) can only be obtained by crushing said ribs, by pressing the two half-shells from the outside against one another, this alignment allowing the introduction of said second axis (3) once the first axis (2 ) already in place before mounting on the bar, as a result of which the pressure exerted from the outside on said half-shells (la, lb) will allow said axes to be subjected, on the part of said nested hinges, to bending forces of alternating directions, and thus to be held in place by friction.

3. Bearing according to claim 2, characterized in that said frame (1) has at least at its closure means (3, 4) and on each half-shell (la, lb), bearing surfaces ( 9) for pliers or the like, accessible at least locally by means of notches (10) formed in said mattress (6).

4. Bearing according to any one of the preceding claims, characterized in that the two half-shells (la, lb) are identical and can be adjusted to one another by complementary shapes when they are opposite l 'to each other by their respective edges, the hinges (4) of one being inserted exactly between the hinges (4) of the other.