MXPA97008531A - Suspensor for the automotive vehicle escape collector; assembly that comprises the suspen - Google Patents

Abstract

The present invention relates to a suspension for automotive vehicle exhaust manifold, comprising an upper frame (3) suitable to be attached to the body (5) of the vehicle and a lower frame (4) suitable to be attached to a collector (6) exhaust, these two reinforcements being joined together by an elastic system, characterized in that said elastic system comprises two crossed elastic rings (1, 2) that each incorporate a ring (B) of a material with high modulus of elasticity covered of rubber (C), these rings (1, 2) being fixed to one and the other reinforcement (3, 4) in two diametrically opposed locations of their circumference.

Description

SUSPENSOR FOR THE AUTOMOTIVE VEHICLE ESCAPE COLLECTOR; ASSEMBLY THAT UNDERSTANDS THE SUSPENSOR The present invention relates to a suspender for the escape of an automotive vehicle, which has a superior armature suitable to be fastened to the body of the vehicle and a lower armature suitable to be fastened to an exhaust manifold, these two reinforcements are joined between Yes for an elastic system. The object of the present invention is to obtain a great flexibility of the suspender in the vertical direction (Z direction) under load, ie when the suspender, attached to the body, supports an exhaust manifold at rest but certainly with a sharp increase of the tension when important forces are exerted on the collector in the vertical descending direction. You must also obtain a good damping of vibrations in this direction Z so that the collector of a vehicle in motion does not transmit more than the minimum of vibrations to the body. Likewise, it is desirable that the hanger has a great flexibility in the longitudinal direction (X) of the vehicle, to withstand the expansion of the exhaust manifold under the effect of temperature. Finally, a great flexibility must also be obtained with respect to the forces exerted in the transverse direction (Y), but with a limitation of the displacements in this direction and, if possible, without impairing the flexibility in the Z direction. The presently known suspenders do not respond to all of these conditions, especially as regards the limitation of the movements of the axes in the transverse direction Y. All the desirable properties indicated above are obtained, in accordance with the present invention, thanks to a suspensor of the type indicated at the beginning, characterized in that said elastic system has two crossed elastic rings in which each one incorporates a ring of a material with high modulus of elasticity covered in rubber, these rings are fixed to one and the other reinforcement in two places diametrically opposite of its circumference. It can be provided, for example, that said rings have at rest a general circular or slightly elliptical shape, and have a flat cross section. It is understood that such a hanger can have a very great flexibility with respect to the vertical tensile forces (in the Z direction) that are exerted between the two reinforcements, since the rings could deform very easily, ovalizing, until the sections that they extend between the two armors, originally arcs of circle, they are tensed enough to be almost rectilinear.

From that moment, the tensile stress of the rings of material with high modulus of elasticity of the two rings will intervene, which will provide the desirable limitation of the elongation of the suspensor under the effect of vertical forces. It is also understood that this suspender will also have great flexibility with respect to the horizontal forces exerted in the transverse direction (Y) perpendicular to the median vertical plane of the suspender. In effect, such forces will subject only one of the rings to the ovalizing extension forces until the limit of extension, and the resulting weaker tension does not increase more than a little by the presence of the other ring, which will suffer, for the otherwise, a compression eventually accompanied by a bend. The limitation of the displacement of the exhaust manifold in this direction will be ensured only by that of the rings (in the direction of travel) that will be subjected to an extension, but this effect will be sufficient, taking into consideration the fact that the forces in the direction horizontal and transverse will be in principle more reduced (centrifugal force in the turns), than vertical forces. With respect to the forces exerted in the horizontal and longitudinal direction (X direction) perpendicular to the previous one, the suspensor will also oppose a weak tension, in fact "rolling" the two rings carried between the armors. As for the damping effect of the vibrations with respect to the different forces, this will be obtained thanks to the rubber (natural or synthetic) interposed between the armor and the resistant rings of the rings. Conveniently, and to optimize the effects described above, the suspender may also be characterized in that the angle under which said rings are crossed at rest is approximately 90 °, these rings being angularly separated, on one side and the other of the vertical plane medium of the suspensor, by an angle of approximately 45 ° with respect to this plane. In order to limit the deformations of the rings while maintaining a very weak tension of the suspender under the static force at rest, it can also be foreseen that in the two diametrically opposite areas of their crosses, said rings are in solidarity with each other, these areas being in addition joined together by a diametral elastic arm able to undergo deformation. The arrangement is such that this deformation of the arm occurs since the suspensor supports the static load of the collector, the deformation of the arm occurs by the ovalization of the rings and the consecutive approach, from each other, of the two diametrically opposed zones.

As regards the reinforcements, each of these will be constituted by a plate comprising a central part suitable to be fastened to the body of the vehicle or to said collector, and two end parts that serve as supports to said rings and bent each one obliquely to the inside of the corresponding ring. This bending will, of course, be a function of the inclination of the rings, so that the plane of each ring extends perpendicularly to the plane of the end parts of the reinforcements. This suspender may also be characterized in that it comprises resilient stops which face each other and are directed towards each other, being carried respectively by the central part of said plates, which will make it possible to limit the clogging of the suspensor under the effect of the ascending forces exerted on it by The exhaust manifold. The present invention also deals with the general arrangement of an assembly comprising a vehicle body, a suspensor according to the foregoing, attached to the bodywork, and an exhaust manifold attached to the suspensor. Taking into account the considerations set forth above, such an assembly could be characterized in that the suspender is oriented in such a way that the line joining the diametrically opposite zones of the crosses of said rings has the same direction as the longitudinal axis of the vehicle. This assembly may also be characterized in that the static load of said exhaust manifold at rest subjects the rings to forces such that the diametrical spring arm undergoes deformation. Now, by way of example, a non-limiting embodiment of the invention will be described with reference to the figures of the accompanying drawing in which: Figure 1 is a sectional view of the suspender according to line II of Figure 2, in FIG. an assembly according to the invention, the suspender being supposed to be at rest, that is to say, not subjected to the static charge of the exhaust manifold; Figure 2 is a side view of this hanger; Figure 3 is the deformation diagram of the suspensor in the vertical direction when it is subjected to the forces Fz; Figure 4 is a side view of the hanger subjected to the static charge of an exhaust manifold; and Figure 5 is a side view showing the deformation of the hanger when subjected to longitudinal forces in the X direction. In the drawing, the reference axes, which are the Z axis of the vertical forces, the X axis of forces were represented. longitudinal (direction of the exhaust manifold), and the Y axis of the transverse forces.

The suspender comprises an outer ring 1, crossed at 90 ° with an inner ring 2 penetrating it and whose external diameter before assembly is slightly greater than the inner diameter of the outer ring 1. In this way, the introduction of the ring 2 into the ring 1 causes its ovalization: ring 2 was extended in vertical direction and ring 1 in horizontal direction, so that a compensation is established, which allows them to have practically the same inter-axes at the level of the extreme bent parts 31-41 and 32-42 of the reinforcements in sheet 3 and 4, one attached to the body 5 of the vehicle by a screw 33 and the other to the exhaust manifold 6 by a screw 43. It will be noted that two rings can also be used that have in principle exactly the same dimensions, which would greatly increase its ovalization after assembly. At the fixation level the inter-axes would then be different. However, the problem would be easily solved by providing between the end portions 31 and 41, which serve as support for the outer ring 1, a spacing less than the spacing between the folded end portions 32 and 42 which serve as support for the inner ring 2, which would then have a height substantially greater than that of the outer ring. The reinforcements 3 and 4 would then be asymmetric, which would present neither inconvenience nor manufacturing difficulty. Whichever is the embodiment, the rings will advantageously be each constituted by a ring B covered with natural or synthetic rubber C adhered to the plates 3 and 4 at the level of the bent ends 31-32 and 41-42. The rings could be made of any suitable material with high modulus of elasticity; metallic fabric, glass or carbon fibers, metal band, etc. In section 7, a horizontal rubber arm is shown connecting the two diametrically opposite zones of the inner ring 2, at the level of its joint with the outer ring 1. The rubber can be overmoulded on these joint areas to avoid discontinuity between the rings and ensure their solidarity at this level. Figure 4 shows the deformation of the arm 7 when the suspensor is subjected to a static force FZQ corresponding to the weight of the exhaust manifold at rest. Figure 3 shows the diagram of vertical elongations of the suspensor as a function of the vertical forces Fz exerted on them by the collector. It is seen that from one side and the other of the deformation zone Fj, responses Rl and R2 are obtained at the strong tension, the lower zone Rl is due to the strong compressive tension of the arm 4 before the deformation and the upper zone R2 it is due to the extension of the B rings of the rings. The area with strong tension R3 corresponds to a stop of the suspender after the ascending vertical forces were exerted on it by the manifold 6. This stop can be obtained comfortably by rubber blocks 34 and 44 overmolded on the heads of the screws 33 and 43 and suitable for bumping the arm 7 on one side and on the other after the suspension is clogged. On Figure 1 the offset of the supports 41 and 42 was represented by circle arcs in dotted line when the collector 6 subjected the suspensor to transverse forces, with the elastic and limiting effects described above. Figure 5, finally, shows the deformation of the suspensor when the collector 6, for example under the effect of a dilatation Delta x, subjected it to longitudinal forces. There is then little deformation of the rings, which also explains the weak tension of the suspensor in this direction X, with a vertical tension (direction Z) slightly disturbed, whatever the deviation in X.

Claims (8)

1. Exhaust manifold for automotive vehicle, comprising a top frame (3) suitable to be attached to the body (5) of the vehicle and a lower frame (4) suitable to be attached to an exhaust manifold (6), being these two reinforcements joined together by an elastic system, characterized in that said elastic system comprises two crossed elastic rings (1, 2) each incorporating a ring (B) of a materwith a high modulus of elasticity covered in rubber (C), these rings (1, 2) being fixed to one and the other reinforcement (3, 4) in two diametrically opposed locations of their circumference.

2. Suspensor according to claim 1, characterized in that the angle at which said rings (1, 2) intersect at rest is approximately 90 °, these rings being angularly separated, on one side and the other of a vertical plane half of the suspensor, by an angle of approximately 45 ° with respect to this plane.

3. Suspensor according to claim 1 or 2, characterized in that in the two diametrically opposed areas of their crosses the rings (1, 2) are joined to one another, these two areas being further joined to each other by a diametral elastic arm. (7) apt to undergo a deformation.

A suspension according to any of the preceding claims, characterized in that said rings (1, 2) have at rest a general circular or slightly elliptical shape, and have a flat cross section.

5. Suspension according to any of the preceding claims, characterized in that said reinforcements are each constituted by a plate (3, 4) comprising a central part suitable to be attached to the body (5) of a vehicle or to the collector (6) , and two end parts (31, 32, 41, 42) that serve as supports to said rings (1, 2) and each one bent obliquely towards the inside of the corresponding ring.

6. Suspensor according to claim 5, characterized in that it has two resilient stops (34, 44) facing and directing towards each other, being carried respectively by the central part of the plates (3, 4).

Assembly comprising a vehicle body (5), a suspender according to any of the preceding claims, fixed to the body, and an exhaust manifold (6) fixed to said suspension, characterized in that the latter is oriented so that the line joining the diametrically opposite zones of the intersections of said rings (1, 2) has the same direction as the longitudinal axis (X) of the vehicle.

8. Assembly according to claim 7, comprising a suspender according to claim 3, characterized in that the static charge of the exhaust manifold (6) at rest subjects the rings (1, 2) to forces such that the elastic arm (7) diametral suffers a deformation.