CN106164436A - The exhaustor suspension bracket of motor vehicles - Google Patents

Abstract

The invention mainly relates to the exhaustor suspension bracket (1) of a kind of motor vehicles, including: main body (2), it is formed by elastomeric material, for cooperating with the arm coming from gas exhaust piping, with pedestal (4), it is equipped with at least one opening (11), described opening is adapted to allow for the fixing device of described exhaustor suspension bracket (1) to be passed through on the element being positioned at below motor vehicle floor, it is characterized in that, described pedestal (4) also includes indexing means (14), it is for making described exhaustor suspension bracket (1) index relative to mechanical erection plate (15) by the cooperation between at least two dividing column (17) and two corresponding guide holes (16).

Description

Exhaust pipe hangers for motor vehicles

technical field

The invention relates to an exhaust pipe hanger of a motor vehicle and a corresponding automatic installation method.

Background technique

It is known that a motor vehicle equipped with a heat engine comprises an exhaust line for combustion gases during combustion of a mixture of air and hydrocarbon fuel in the cylinders of the engine.

This exhaust line includes, inter alia, an exhaust duct and a decontamination system, for example of the SCR ("Selective Catalytic Reduction" in English, "Réduction Sélective Catalytique" in French) type system, which allows a chemical reduction of the nitrogen oxides present in the exhaust gas.

The exhaust line installed under the floor is held by exhaust pipe hangers which are each fastened to a component located under the vehicle floor. Thus, each arm supporting the exhaust line cooperates with a groove provided in the body of the exhaust hanger. The main body is made of an elastic material, such as an elastomer, to ensure relief of vibrations and stresses generated during operation of the vehicle that may be reflected on the discharge member.

Document DE3643698 describes a mounting method in which the positioning of the exhaust pipe hanger on the mechanical mounting plate is achieved by bringing the outer contour of the base of the hanger against the inner face of the mounting part. However, such a system does not allow compliance with the standards for automatic screw connections which stipulate a very small permissible distance of less than two millimeters.

In fact, mechanically welded parts such as bases have a permissible spacing of about 2.5 mm, so that indexing by the outer profile produces at least a permissible spacing of this value respecting the length of the part. In addition, it is necessary to provide supplementary clearance for the profile to be placed inside the groove ensuring centering, which leads to allowable clearances when positioning hangers substantially higher than the clearance imposed by the screwing station.

Contents of the invention

The present invention aims to effectively solve this drawback by proposing an exhaust pipe hanger for a motor vehicle comprising: a main body formed of elastic material for connecting with the exhaust pipe Cooperating with the arm of the motor vehicle, and the base, equipped with at least one opening, said opening is suitable for allowing the fastening device of said exhaust pipe hanger to pass on the element located under the floor of the motor vehicle, characterized in that said base is also Indexing means are included for indexing the exhaust pipe hanger relative to the mechanical mounting plate by cooperation between at least two indexing posts and two corresponding guide holes.

Thus, the invention also relates to an assembly formed by: - an exhaust pipe hanger for a motor vehicle, comprising: a body formed of elastic material for cooperating with an arm emerging from the exhaust pipe, and a base , which is equipped with at least one opening suitable for allowing the passage of the fixing means of the exhaust pipe hanger over an element located under the floor of the motor vehicle; and, - a mechanical mounting plate, which enables the base to also comprise Indexing means for indexing the exhaust pipe hanger relative to the mechanical mounting plate by cooperation between at least two indexing posts and two corresponding guide holes.

The invention thus allows precise positioning of the hanger on said mechanical mounting plate. In fact, contrary to the system described in document DE3643698, the indexing of the hanger on the mechanical mounting plate is realized in approximately point-like areas, which makes the indexing independent of the component manufacturing tolerances. This makes it possible to observe the very small permissible distances prescribed by certain specifications.

According to one embodiment, said indexing means consist of two guide holes implemented in said base, adapted to cooperate with an indexing column belonging to said mechanical mounting plate.

According to one embodiment, the two guide holes are implemented in lugs emerging from the longitudinal edge of the base.

According to one embodiment, the two guide holes are completely opposite to each other.

According to one embodiment, the size of one of the guide holes is substantially equal to the size of the corresponding graduation column, while the size of the other elliptical guide hole is slightly larger than the size of the corresponding graduation column. This allows the positioning of the base to be adjusted in the longitudinal direction of the vehicle or in the transverse direction of the vehicle.

According to one embodiment, the base comprises at least one support area for abutting against a corresponding support surface of the mechanical mounting plate.

According to one embodiment, the base comprises two support areas extending convexly on either side of the body.

According to one embodiment, said body has the shape of a parallelepiped with two bevels on the side opposite to said base.

The present invention also relates to a method for automatically installing the exhaust pipe hanger of a motor vehicle as defined above, characterized in that the method comprises:

- the step of placing said exhaust pipe hanger on a mechanical mounting plate by means of said indexing means,

- the step of moving the frame to the vicinity of elements located under the floor of the motor vehicle,

- the step of mounting said exhaust pipe hanger on said element, in particular by mechanical means, preferably by screwing, and

- the step of retracting said mechanical mounting plate.

According to one embodiment, the step of placing the exhaust pipe hanger is to make the guide hole opened in the base of the exhaust pipe hanger cooperate with the indexing column of the mechanical mounting plate.

According to one embodiment, the step of placing the exhaust pipe hanger consists in placing a support area of the exhaust pipe hanger against a corresponding support surface of the mechanical mounting plate.

Description of drawings

The invention may be better understood by reading the following description and by studying the accompanying drawings. The given drawings are only illustrative and not limiting of the invention. .

1 is a perspective view of an exhaust pipe held under a vehicle floor by an exhaust pipe hanger according to the present invention;

Figures 2a to 2e show the different steps of placing the exhaust pipe hanger on the mechanical mounting plate and then screwing the exhaust pipe hanger on the underbody element of the motor vehicle.

detailed description

Identical, similar or analogous elements retain the same references between figures.

Figure 1 shows an exhaust pipe hanger 1 comprising a body 2 secured to a base 4, for example by means of an agrafe system. A body 2 , preferably made of elastic material such as elastomer, is intended to cooperate with an arm 3 welded by one end to the wall of the exhaust line 5 .

Thus, the body 2 comprises a groove 6 in which one end of the arm 3 is snapped into place. The arm 3 may comprise a flange 8 visible in FIG. 2 c , which elastically deforms the material of the body 2 at the groove 6 which then closes to hold the arm 3 after insertion of the flange 8 .

The body 2 is in this case in the shape of a parallelepiped with two bevels 9 on the opposite side to the base 4 . This shape allows easy insertion of the main body 2 into the channel delimited by the mechanical mounting plate 15 described below. However, as a variant, the main body 2 can assume all other shapes suitable for the underbody construction of the vehicle.

Furthermore, the base 4 has a generally rectangular shape at rounded end edges. As clearly visible in FIGS. 2 a and 2 b , the hanger 1 is equipped with two openings 11 suitable for allowing the passage of the fixing means 12 of the hanger 1 over elements located under the floor of the motor vehicle. The opening 11 is located in the longitudinal end of the base 4 . The fixing means 12 are in this case screws, but may be replaced in variants by rivets or all other equivalent means.

The base 4 also comprises indexing means 14 for indexing the hanger 1 relative to the mechanical mounting plate 15 (see Figures 2a and 2b). The indexing device 14 is formed in this case by two guide holes 16 for cooperating with an indexing column 17 belonging to the mechanical mounting plate 15 . The two guide holes 16 are diametrically opposed to each other. These guide holes 16 are implemented in two lugs 19 emerging from the longitudinal edge of the base 4 .

The size of one of the guide holes 16 is substantially equal to that of the corresponding post 17 , while the size of the other, slightly oval guide hole 16 is slightly larger than that of the corresponding post 17 . Thereby, it is avoided to have a statically indeterminate system by allowing the positioning of the base 4 to be adjusted in the longitudinal direction of the vehicle and/or in the transverse direction of the vehicle.

As a variant, the guide holes 16 are replaced by pins emerging from the ears 19 for cooperating with holes of complementary shape implemented in the plate 15 .

As can be seen in FIG. 2 a , the base 4 comprises two support areas 21 located around the opening 11 , each for bearing against a corresponding support surface 30 of the plate 15 . These support areas 21 extend convexly on both sides of the main body 2 .

The axis of the guide hole 16 and the opening 11 implemented in the base 4 are substantially perpendicular to the axis of the groove 6 of the receiving arm 3 .

Furthermore, the mechanical mounting plate 15 comprises two facing brackets 25, each of which is substantially U-shaped. The free ends of the branches of the bracket 25 are located at a distance from each other. These brackets 25 thus delimit a channel 28 of substantially rectangular section for the body 2 of the hanger 1 . In addition, each bracket 25 comprises a support surface 30 of the base 4 screwed around the positioning pin 26 . The posts 17 emerging from the support surface are positioned in the vicinity of two diametrically opposed corners defining the opening of the channel 28 .

In the following, with reference to FIGS. 2 a to 2 e , an automatic mounting method of the aforementioned exhaust pipe hanger 1 on an underbody element 40 , ie in this case below the vehicle floor in the form of a seat cross member reinforcement, is described. The exhaust line 5 and the corresponding arm 3 are not shown in all figures to facilitate understanding.

In a first step shown on FIGS. 2 a and 2 b , the hanger 1 is placed on the mechanical mounting plate 15 . Thus, the main body 2 is inserted into the interior of the channel 28 via its end with a bevel. In addition, the controlled centering of the hanger 1 on the mechanical plate 15 is carried out by cooperating the indexing column 17 of the bracket 25 with the guide hole 16 of the hanger 1 . The support area 21 of the hanger 1 bears against the corresponding support surface 30 of the bracket 25 . Each opening 11 of the base 4 is thus positioned opposite the corresponding screw-on positioning pin 26 .

The mechanical mounting plate 15 then moves with the hanger 1 so that it bears in the vicinity of the underbody element 40 as shown on Figures 2c and 2d. The element 40 comprises a flat area 41 against which the hanger 1 is intended to be fixed. The positioning pins 26 and the openings 11 of the bracket 1 are positioned opposite the corresponding holes 43 implemented in the flat area 41 of the beam reinforcement.

The threaded connection of the hanger 1 on the element 40 of the base plate is then achieved by unscrewing the dowel pins 26 so that the base 4 remains screwed between the screw head 12 and the wall of the element 40, tightened if necessary by a washer.

The mechanical mounting plate 15 is then retracted by moving it away from the underbody element 40, as shown in Figure 2e.

The exhaust pipe 5 is held by four exhaust pipe hangers, which can be carried out in a similar manner to fasten the exhaust pipe hangers in places such as longitudinal members, rear cross members and underfloor areas of the vehicle or any other capable The parts that accept the exhaust hanger are made up of three other underbody elements.

It is known that the plate 15 is integrated on the mechanical frame on which it is mounted before fixing the exhaust line under the vehicle floor.

Apart from placing the hanger 1 on the mechanical mounting plate 15, all other steps of the method according to the invention can be carried out automatically, which represents a great gain in terms of installation time and labor.

As a variant, the hanger 1 comprises a sole support area 21 against the mechanical mounting plate 15 .

Of course, the above description is given by way of example only and does not limit the scope of the present invention, and all other equivalents may be used instead of implementation details without departing from the scope of the present invention.

Claims (10)

1. an assembly, by formed below: the exhaustor suspension bracket (1) of-motor vehicles, including: main body (2), it is by elastomeric material Formed, for cooperating with the arm (3) coming from gas exhaust piping (5), and pedestal (4), it is equipped with at least one opening (11), described Opening is adapted to allow for the fixing device (12) of described exhaustor suspension bracket (1) and is being positioned at the element below motor vehicle floor (40) On pass through；And ,-mechanical erection plate (15), it is characterised in that described pedestal (4) also includes indexing means (14), it is used for leading to Cross the cooperation between at least two dividing column (17) and two corresponding guide holes (16) make described exhaustor suspension bracket (1) relative to Mechanical erection plate (15) indexes.

Assembly the most according to claim 1, it is characterised in that described indexing means (14) is by real in described pedestal (4) Two guide holes (16) executed are constituted, it is adaptable to cooperate with the dividing column (17) belonging to described mechanical erection plate (15).

Assembly the most according to claim 2, it is characterised in that said two guide hole (16) comes from described pedestal (4) The ear (19) of longitudinal edge implements.

4. according to the assembly according to any one of claim 1-3, it is characterised in that said two guide hole (16) complete phase each other Right.

5. according to the assembly according to any one of claim 1-4, it is characterised in that the size of in described guide hole (16) Be substantially equal to the size of dividing column (17) of correspondence, and another oval guide hole (16) be dimensioned to be slightly larger than correspondence point The size of degree post (17).

6. according to the assembly according to any one of claim 1-5, it is characterised in that described pedestal (4) includes at least one Support region (21), for the corresponding stayed surface (30) against described mechanical erection plate (15).

Assembly the most according to claim 6, it is characterised in that described pedestal (4) includes two supporting zones (21), its The projection ground, both sides of described main body (2) extends.

8. according to the assembly according to any one of claim 1-7, it is characterised in that described main body (2) is parallelepiped-shaped Shape, has two oblique angles (9) being positioned at described pedestal (4) opposition side.

9. the exhaustor suspension bracket (1) formed according to assembly in any one of the preceding claims wherein and mechanical erection plate (15) automatic installation method, it is characterised in that described method includes:

-by described indexing means (14), described exhaustor suspension bracket (1) is placed on the step on mechanical erection plate (15),

-member frame moved the step near the element (40) being positioned at below motor vehicle floor,

-described exhaustor suspension bracket (1) is installed step on the element, install particularly by machinery, preferably It is threaded connection and installs, and

-regain the step of described mechanical erection plate (15).

Method the most according to claim 9, it is characterised in that the step of described placement described exhaustor suspension bracket is, makes The guide hole (16) offered in the described pedestal (4) of described exhaustor suspension bracket (1) and the dividing column of described mechanical erection plate (15) (17) cooperation.