FR2867511A1 - Tubular sections assembling device for heat engine, has sealing unit that is constituted by sealing joint interposed between apron and seat, where joint has annular bulge and is adapted to form of annular washer - Google Patents

Abstract

The device has a sealing unit which is defined at the level of an apron and/or a seat. The sealing unit is constituted by a sealing joint (14) which is interposed between the apron and the seat. The joint including an annular bulge (20) is adapted to the form of an annular washer (15) that delimits a central opening (16) which is traversed by a tubular section.

Description

2867511 1

  The present invention relates to a reversible assembly device of a first and a second tubular section of an exhaust line. This invention, again, relates to a seal for such an assembly device.

  This invention relates to the field of the automotive industry and, more particularly, that of equipment for ensuring the escape of gases from the combustion of a fuel within an internal combustion engine.

  It will be observed that such equipment complements this heat engine and is constituted by an exhaust line, equipping the output of this engine, and defined by an assembly of a succession of elements, in particular tubular elements, as well as, usually, a silencer designed to reduce the noise emissions of this engine and this line of exhaust.

  Already known, exhaust lines having a succession of tubular elements assembled by welding. Such a type of welded assembly has the disadvantage, in case of deterioration of an element of this exhaust line, not to be able to replace the only deteriorated element but requires, in most cases, a replacement the entire exhaust line.

  This problem has, in part, been solved by means of a reversible assembly device of two tubular sections of such an exhaust line, this device allowing replacement of only part of this exhaust line, more particularly of a deteriorated part.

  In fact, such a device comprises interlocking means associated with a first tubular section and complementary engagement means associated with a second tubular section and adapted to cooperate with said interlocking means of the first tubular section. This device comprises, again, means adapted to ensure immobilization of the first and second tubular section relative to each other. It will be observed that this device has a number of drawbacks related to a lack of leaktightness of the exhaust line at this device.

  The present invention is intended to overcome the disadvantages of devices of the state of the art.

  For this purpose, the invention relates to a reversible assembly device of a first and a second tubular section of an exhaust line, this device comprising, on the one hand, interlocking means associated with the first tubular section as well as complementary engagement means associated with the second tubular section and adapted to cooperate with said interlocking means of the first tubular section and, secondly, means adapted to ensure immobilization of the first and second tubular section relative to each other. This device comprises: - a skirt, extending the interlocking means associated with the first tubular section, and flaring from these interlocking means; a seat associated with the second tubular section and adopting a shape complementary to said skirt; - Immobilizing means constituted by reversible type means adapted to support said skirt against said seat; sealing means associated with the skirt and / or the seat.

  According to another characteristic, the invention also relates to a seal intended to be interposed between the skirt and the seat of the aforementioned reversible assembly device, characterized in that this seal: - adopts the shape of a annular washer defining a central opening to be traversed by a tubular member; - adopts a frustoconical shape to fit the conical shape of the skirt and / or seat; comprises means capable of ensuring its maintenance on said tubular element engaged through the central opening.

  Such a seal is designed, on the one hand, to be arranged between the skirt and the seat and, on the other hand, to be compressed between this skirt and this seat, this through the means of mentioned above.

  Other objects and advantages of the present invention will become apparent from the following description relating to embodiments which are given by way of indicative and non-limiting examples.

  The understanding of this description will be facilitated with reference to the drawing attached in the appendix and in which: FIG. 1 is a diagrammatic partial view in longitudinal section of the assembly device according to the invention; - Figure 2 is a schematic partial and plan view of a seal; - Figure 3 is a schematic and side view of the seal shown in Figure 2; - Figure 4 is a schematic and sectional view along II-II of the seal shown in Figure 2.

  The present invention relates to the field of the automotive industry and, more particularly, that of equipment for ensuring the escape of gases from the combustion of a fuel within an internal combustion engine.

  Such equipment completes this engine and is constituted by an exhaust line 1, equipping the output of the engine, and defined by an assembly of a succession of elements, including tubular elements.

  The invention relates, then, to a device 2 designed to ensure a reversible assembly of a first tubular section 3 that includes a first element of this exhaust line 1 with a second tubular section 4 that comprises a second element of this line. exhaust 1.

  To do this and as visible in FIG. 1, such a device 2 comprises, on the one hand, interlocking means 5 associated with the first tubular section 3 as well as complementary interlocking means 6 associated with the second section. tubular 4 and adapted to cooperate with said means 5 of interlocking the first tubular section 3 and, secondly, means adapted to ensure immobilization of the first 3 and second 4 tubular section 3 relative to the other 4.

  In this respect, it will be observed that the interlocking means 5 associated with the first tubular section 3 consist of an interlocking sleeve. This interlocking sleeve is preferably constituted by an extension of this first tubular section 3 and has an increased internal section with respect to the latter 3.

  These engagement means 5 (more particularly the interlocking sleeve) are extended by a skirt 8 flaring. This skirt 8 is more particularly constituted by a conical flare such as a hoop.

  With regard to the complementary interlocking means 6 associated with the second tubular section 4, the latter 6 consist of a portion of tube of section at most equal (but preferably adjusted) to the internal section of the interlocking sleeve of the interlocking means 5 of the first tubular section 4.

  The tube portion of the complementary interlocking means 6 is defined either by the second tubular section 4 itself (FIG. 1) or by an extension of the latter 4.

  The device 2 comprises, again, a seat 9 associated with the second tubular section 4 and adopting a shape complementary to that of said skirt 8, more particularly a conical shape.

  This seat 9 may be constituted by an annular bead associated with the second tubular section 4, such a bead can be defined by deformation of the second tubular section 4, in particular by expansion.

  However and according to another embodiment, this seat 9 is defined at an annular element 10 disposed around this second tubular section 4 (more particularly fitted 2867511 5 over the latter 4) and made integral with this second section. tubular 4, in particular by welding.

  A preferred embodiment consists in that this annular element 10 is constituted by a double cone.

  According to another characteristic of the invention, this seat 9 is set back with respect to the free end 11 of the second tubular section 4, more particularly recessed with respect to the tube portion of the complementary interlocking means 6.

  In this regard and as can be seen in FIG. 1, between this seat 9 and the free end 11 of this second tubular section 4, the latter 4 comprises a part of tube usually referred to as a control and, at least in part, defined by the means of FIG. complementary interlocking 6.

  According to another characteristic of the invention, the device 2 comprises, again, means 12 able to ensure immobilization of the first 3 and second 4 tubular section 3 with respect to the other 4.

  These immobilizing means 12 consist of reversible type means and designed capable of making said skirt 8 rest against said seat 9.

  These immobilizing means 12 are preferably defined by a collar (more particularly a clamp) disposed over this skirt 8 and this seat 9, more particularly over this skirt 8 and an annular element 10 (in particular constituted by a bi-cone as evoked above).

  In order to make a bearing of this skirt 8 on this seat 9, the collar of these immobilizing means 12 is itself designed to bear on this skirt 8 and on this seat 9 (or on said annular element 10). To do this, this collar may adopt a shape complementary to this skirt 8 and seat 9 (or to the annular element 10 mentioned above and visible in Figure 1).

  According to another characteristic of the invention, the device 2 comprises, again, sealing means 13, that is to say 2867511 6 implanted at the level of the skirt 8 and / or the seat 9, or interposed between this skirt 8 and this seat 9.

  Such sealing means 13 are designed so as to be crushed by the skirt 8 and / or by the seat 9, this by means of immobilizing means 12 and in order to ensure the seal between this skirt 8 and this seat 9.

  According to a first embodiment not shown, such sealing means 13 may be defined at this skirt 8 and / or seat 9 and adopt, for example, the shape of an annular bead.

  However, and according to a preferred embodiment visible in the appended figures, these sealing means 13 are constituted by a seal 14 interposed between the skirt 8 and the seat 9.

  This seal 14 takes the form of an annular washer 15 defining a central opening 16 to be traversed by a tubular element, more particularly constituted by the second tubular section 4. According to a preferred embodiment shown in Figure 1, this seal 14 is intended to be engaged over the witness that includes this second tubular section 4.

  This seal 14 adopts a frustoconical shape so as to match the conical shape of the skirt 8 and / or the seat 9.

  According to another feature, this seal 14 comprises means 17 able to maintain it on a tubular element (more particularly on the witness of the second tubular section 4) engaged through the central opening 16.

  In fact, these holding means 17 consist of tabs 18 extending radially inside the central opening 16 and from the washer 15.

  Such a tongue 18 is of elastic type in order to ensure the holding of this tongue 18 on the tubular element. A preferred embodiment consists in defining this tongue 18 of material with said washer 15.

  As can be seen in FIGS. 3 and 4, such a tongue 18 has a free end 19 shaped flared 2867511 7 in order to facilitate, where appropriate, the extraction of the seal 14 in case of disassembly.

  Another characteristic of this seal 14 is that it comprises, more particularly at its washer 15, an annular bead 20.

  It is, more particularly, this bead 20 which seals between the skirt 8 and the seat 9.

  To do this, this bead 20 is designed so as to be crushed by the skirt 8 and / or the seat 9.

  According to another characteristic, the seal 14 is defined in a metallic material.

  Although the invention has been described with respect to a particular embodiment, it is understood that it is in no way limited and that various modifications of shapes, materials and combinations thereof can be made. various elements without departing from the scope and spirit of the invention.

2867511 8

Claims (2)

  1. Device (2) reversibly assembling a first (3) and a second (4) tubular section of an exhaust line (1), this device (2) comprising, on the one hand, interlocking means (5) associated with the first tubular section (3) as well as complementary engagement means (6) associated with the second tubular section (4) and able to cooperate with said interlocking means (5) of the first tubular section (3) and, secondly, means (12) adapted to ensure immobilization of the first (3) and second (4) tubular section one (3) relative to the other (4) , characterized in that it comprises: - a skirt (8), extending the engagement means (5) associated with the first tubular section (3), and flaring from these interlocking means (5); - A seat (9) associated with the second tubular section (4) and adopting a shape complementary to said skirt (8); immobilization means (12) constituted by reversible type means able to make said skirt (8) rest against said seat (9); - Sealing means (13) associated with the skirt (8) and / or the seat (9).   2. Seal (14) intended to be interposed between the skirt (8) and the seat (9) of the reversible assembly device (2) according to claim 1, characterized in that this seal (14): - adopts the form of an annular washer (15) delimiting a central opening (16) to be traversed by a tubular element - adopts a frustoconical shape so as to marry the conical shape of the skirt (8) and / or seat (9); - Has means (17) adapted to ensure its maintenance on said tubular member engaged through the central opening (16).